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linux/fs/btrfs/send.c

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Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: using vmalloc and friends needs vmalloc.h On powerpc, we don't get the implicit vmalloc.h include, and as a result the build fails noisily: fs/btrfs/send.c: In function 'fs_path_free': fs/btrfs/send.c:185:4: error: implicit declaration of function 'vfree' [-Werror=implicit-function-declaration] fs/btrfs/send.c: In function 'fs_path_ensure_buf': fs/btrfs/send.c:215:4: error: implicit declaration of function 'vmalloc' [-Werror=implicit-function-declaration] fs/btrfs/send.c:215:12: warning: assignment makes pointer from integer without a cast [enabled by default] fs/btrfs/send.c:225:12: warning: assignment makes pointer from integer without a cast [enabled by default] fs/btrfs/send.c:233:13: warning: assignment makes pointer from integer without a cast [enabled by default] fs/btrfs/send.c: In function 'iterate_dir_item': fs/btrfs/send.c:900:10: warning: assignment makes pointer from integer without a cast [enabled by default] fs/btrfs/send.c:909:11: warning: assignment makes pointer from integer without a cast [enabled by default] fs/btrfs/send.c: In function 'btrfs_ioctl_send': fs/btrfs/send.c:4463:17: warning: assignment makes pointer from integer without a cast [enabled by default] fs/btrfs/send.c:4469:17: warning: assignment makes pointer from integer without a cast [enabled by default] fs/btrfs/send.c:4475:2: error: implicit declaration of function 'vzalloc' [-Werror=implicit-function-declaration] fs/btrfs/send.c:4475:20: warning: assignment makes pointer from integer without a cast [enabled by default] fs/btrfs/send.c:4483:21: warning: assignment makes pointer from integer without a cast [enabled by default] Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2012-07-27 10:11:13 +10:00
btrfs: reuse kbasename helper To get name of the file from a pathname let's use kbasename() helper. It allows to simplify code a bit. Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Signed-off-by: Josef Bacik <jbacik@fusionio.com> Signed-off-by: Chris Mason <chris.mason@fusionio.com>
2013-08-21 10:32:13 +03:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: use btrfs_crc32c everywhere instead of libcrc32c After the commit titled "Btrfs: fix btrfs boot when compiled as built-in", LIBCRC32C requirement was removed from btrfs' Kconfig. This made it not possible to build a kernel with btrfs enabled (either as module or built-in) if libcrc32c is not enabled as well. So just replace all uses of libcrc32c with the equivalent function in btrfs hash.h - btrfs_crc32c. Signed-off-by: Filipe David Borba Manana <fdmanana@gmail.com> Signed-off-by: Chris Mason <clm@fb.com>
2014-01-29 21:06:04 +00:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
btrfs: send: squeeze bitfilelds in fs_path We know that buf_len is at most PATH_MAX, 4k, and can merge it with the reversed member. This saves 3 bytes in favor of inline_buf. Signed-off-by: David Sterba <dsterba@suse.cz> Signed-off-by: Josef Bacik <jbacik@fb.com>
2014-02-03 19:23:47 +01:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
btrfs: send: lower memory requirements in common case The fs_path structure uses an inline buffer and falls back to a chain of allocations, but vmalloc is not necessary because PATH_MAX fits into PAGE_SIZE. The size of fs_path has been reduced to 256 bytes from PAGE_SIZE, usually 4k. Experimental measurements show that most paths on a single filesystem do not exceed 200 bytes, and these get stored into the inline buffer directly, which is now 230 bytes. Longer paths are kmalloced when needed. Signed-off-by: David Sterba <dsterba@suse.cz> Signed-off-by: Josef Bacik <jbacik@fb.com>
2014-02-05 16:17:34 +01:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
btrfs: add "no file data" flag to btrfs send ioctl This patch adds the flag, BTRFS_SEND_FLAG_NO_FILE_DATA to the btrfs send ioctl code. When this flag is set, the btrfs send code will never write file data into the stream (thus also avoiding expensive reads of that data in the first place). BTRFS_SEND_C_UPDATE_EXTENT commands will be sent (instead of BTRFS_SEND_C_WRITE) with an offset, length pair indicating the extent in question. This patch does not affect the operation of BTRFS_SEND_C_CLONE commands - they will continue to be sent when a search finds an appropriate extent to clone from. Signed-off-by: Mark Fasheh <mfasheh@suse.de> Signed-off-by: Josef Bacik <jbacik@fusionio.com>
2013-02-04 20:54:57 +00:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: skip search tree for REG files It is really unnecessary to search tree again for @gen, @mode and @rdev in the case of REG inodes' creation, as we've got btrfs_inode_item in sctx, and @gen, @mode and @rdev can easily be fetched. Signed-off-by: Liu Bo <bo.li.liu@oracle.com> Signed-off-by: Josef Bacik <jbacik@fb.com>
2014-02-27 17:29:01 +08:00
Btrfs: incompatible format change to remove hole extents Btrfs has always had these filler extent data items for holes in inodes. This has made somethings very easy, like logging hole punches and sending hole punches. However for large holey files these extent data items are pure overhead. So add an incompatible feature to no longer add hole extents to reduce the amount of metadata used by these sort of files. This has a few changes for logging and send obviously since they will need to detect holes and log/send the holes if there are any. I've tested this thoroughly with xfstests and it doesn't cause any issues with and without the incompat format set. Thanks, Signed-off-by: Josef Bacik <jbacik@fusionio.com> Signed-off-by: Chris Mason <clm@fb.com>
2013-10-22 12:18:51 -04:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: add readahead for send_write Btrfs send reads data from disk and then writes to a stream via pipe or a file via flush. Currently we're going to read each page a time, so every page results in a disk read, which is not friendly to disks, esp. HDD. Given that, the performance can be gained by adding readahead for those pages. Here is a quick test: $ btrfs subvolume create send $ xfs_io -f -c "pwrite 0 1G" send/foobar $ btrfs subvolume snap -r send ro $ time "btrfs send ro -f /dev/null" w/o w real 1m37.527s 0m9.097s user 0m0.122s 0m0.086s sys 0m53.191s 0m12.857s Signed-off-by: Liu Bo <bo.li.liu@oracle.com> Reviewed-by: David Sterba <dsterba@suse.cz> Signed-off-by: Josef Bacik <jbacik@fb.com>
2014-03-05 10:07:35 +08:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: fix infinite path build loops in incremental send The send operation processes inodes by their ascending number, and assumes that any rename/move operation can be successfully performed (sent to the caller) once all previous inodes (those with a smaller inode number than the one we're currently processing) were processed. This is not true when an incremental send had to process an hierarchical change between 2 snapshots where the parent-children relationship between directory inodes was reversed - that is, parents became children and children became parents. This situation made the path building code go into an infinite loop, which kept allocating more and more memory that eventually lead to a krealloc warning being displayed in dmesg: WARNING: CPU: 1 PID: 5705 at mm/page_alloc.c:2477 __alloc_pages_nodemask+0x365/0xad0() Modules linked in: btrfs raid6_pq xor pci_stub vboxpci(O) vboxnetadp(O) vboxnetflt(O) vboxdrv(O) snd_hda_codec_hdmi snd_hda_codec_realtek joydev radeon snd_hda_intel snd_hda_codec snd_hwdep snd_seq_midi snd_pcm psmouse i915 snd_rawmidi serio_raw snd_seq_midi_event lpc_ich snd_seq snd_timer ttm snd_seq_device rfcomm drm_kms_helper parport_pc bnep bluetooth drm ppdev snd soundcore i2c_algo_bit snd_page_alloc binfmt_misc video lp parport r8169 mii hid_generic usbhid hid CPU: 1 PID: 5705 Comm: btrfs Tainted: G O 3.13.0-rc7-fdm-btrfs-next-18+ #3 Hardware name: To Be Filled By O.E.M. To Be Filled By O.E.M./Z77 Pro4, BIOS P1.50 09/04/2012 [ 5381.660441] 00000000000009ad ffff8806f6f2f4e8 ffffffff81777434 0000000000000007 [ 5381.660447] 0000000000000000 ffff8806f6f2f528 ffffffff8104a9ec ffff8807038f36f0 [ 5381.660452] 0000000000000000 0000000000000206 ffff8807038f2490 ffff8807038f36f0 [ 5381.660457] Call Trace: [ 5381.660464] [<ffffffff81777434>] dump_stack+0x4e/0x68 [ 5381.660471] [<ffffffff8104a9ec>] warn_slowpath_common+0x8c/0xc0 [ 5381.660476] [<ffffffff8104aa3a>] warn_slowpath_null+0x1a/0x20 [ 5381.660480] [<ffffffff81144995>] __alloc_pages_nodemask+0x365/0xad0 [ 5381.660487] [<ffffffff8108313f>] ? local_clock+0x4f/0x60 [ 5381.660491] [<ffffffff811430e8>] ? free_one_page+0x98/0x440 [ 5381.660495] [<ffffffff8108313f>] ? local_clock+0x4f/0x60 [ 5381.660502] [<ffffffff8113fae4>] ? __get_free_pages+0x14/0x50 [ 5381.660508] [<ffffffff81095fb8>] ? trace_hardirqs_off_caller+0x28/0xd0 [ 5381.660515] [<ffffffff81183caf>] alloc_pages_current+0x10f/0x1f0 [ 5381.660520] [<ffffffff8113fae4>] ? __get_free_pages+0x14/0x50 [ 5381.660524] [<ffffffff8113fae4>] __get_free_pages+0x14/0x50 [ 5381.660530] [<ffffffff8115dace>] kmalloc_order_trace+0x3e/0x100 [ 5381.660536] [<ffffffff81191ea0>] __kmalloc_track_caller+0x220/0x230 [ 5381.660560] [<ffffffffa0729fdb>] ? fs_path_ensure_buf.part.12+0x6b/0x200 [btrfs] [ 5381.660564] [<ffffffff8178085c>] ? retint_restore_args+0xe/0xe [ 5381.660569] [<ffffffff811580ef>] krealloc+0x6f/0xb0 [ 5381.660586] [<ffffffffa0729fdb>] fs_path_ensure_buf.part.12+0x6b/0x200 [btrfs] [ 5381.660601] [<ffffffffa072a208>] fs_path_prepare_for_add+0x98/0xb0 [btrfs] [ 5381.660615] [<ffffffffa072a2bc>] fs_path_add_path+0x2c/0x60 [btrfs] [ 5381.660628] [<ffffffffa072c55c>] get_cur_path+0x7c/0x1c0 [btrfs] Even without this loop, the incremental send couldn't succeed, because it would attempt to send a rename/move operation for the lower inode before the highest inode number was renamed/move. This issue is easy to trigger with the following steps: $ mkfs.btrfs -f /dev/sdb3 $ mount /dev/sdb3 /mnt/btrfs $ mkdir -p /mnt/btrfs/a/b/c/d $ mkdir /mnt/btrfs/a/b/c2 $ btrfs subvol snapshot -r /mnt/btrfs /mnt/btrfs/snap1 $ mv /mnt/btrfs/a/b/c/d /mnt/btrfs/a/b/c2/d2 $ mv /mnt/btrfs/a/b/c /mnt/btrfs/a/b/c2/d2/cc $ btrfs subvol snapshot -r /mnt/btrfs /mnt/btrfs/snap2 $ btrfs send -p /mnt/btrfs/snap1 /mnt/btrfs/snap2 > /tmp/incremental.send The structure of the filesystem when the first snapshot is taken is: . (ino 256) |-- a (ino 257) |-- b (ino 258) |-- c (ino 259) | |-- d (ino 260) | |-- c2 (ino 261) And its structure when the second snapshot is taken is: . (ino 256) |-- a (ino 257) |-- b (ino 258) |-- c2 (ino 261) |-- d2 (ino 260) |-- cc (ino 259) Before the move/rename operation is performed for the inode 259, the move/rename for inode 260 must be performed, since 259 is now a child of 260. A test case for xfstests, with a more complex scenario, will follow soon. Signed-off-by: Filipe David Borba Manana <fdmanana@gmail.com> Signed-off-by: Josef Bacik <jbacik@fb.com> Signed-off-by: Chris Mason <clm@fb.com>
2014-01-22 10:00:53 +00:00
Btrfs: fix send attempting to rmdir non-empty directories The incremental send algorithm assumed that it was possible to issue a directory remove (rmdir) if the the inode number it was currently processing was greater than (or equal) to any inode that referenced the directory's inode. This wasn't a valid assumption because any such inode might be a child directory that is pending a move/rename operation, because it was moved into a directory that has a higher inode number and was moved/renamed too - in other words, the case the following commit addressed: 9f03740a956d7ac6a1b8f8c455da6fa5cae11c22 (Btrfs: fix infinite path build loops in incremental send) This made an incremental send issue an rmdir operation before the target directory was actually empty, which made btrfs receive fail. Therefore it needs to wait for all pending child directory inodes to be moved/renamed before sending an rmdir operation. Simple steps to reproduce this issue: $ mkfs.btrfs -f /dev/sdb3 $ mount /dev/sdb3 /mnt/btrfs $ mkdir -p /mnt/btrfs/a/b/c/x $ mkdir /mnt/btrfs/a/b/y $ btrfs subvolume snapshot -r /mnt/btrfs /mnt/btrfs/snap1 $ btrfs send /mnt/btrfs/snap1 -f /tmp/base.send $ mv /mnt/btrfs/a/b/y /mnt/btrfs/a/b/YY $ mv /mnt/btrfs/a/b/c/x /mnt/btrfs/a/b/YY $ rmdir /mnt/btrfs/a/b/c $ btrfs subvolume snapshot -r /mnt/btrfs /mnt/btrfs/snap2 $ btrfs send -p /mnt/btrfs/snap1 /mnt/btrfs/snap2 -f /tmp/incremental.send $ umount /mnt/btrfs $ mkfs.btrfs -f /dev/sdb3 $ mount /dev/sdb3 /mnt/btrfs $ btrfs receive /mnt/btrfs -f /tmp/base.send $ btrfs receive /mnt/btrfs -f /tmp/incremental.send The second btrfs receive command failed with: ERROR: rmdir o259-6-0 failed. Directory not empty A test case for xfstests follows. Signed-off-by: Filipe David Borba Manana <fdmanana@gmail.com> Signed-off-by: Josef Bacik <jbacik@fb.com>
2014-02-19 14:31:44 +00:00
Btrfs: fix infinite path build loops in incremental send The send operation processes inodes by their ascending number, and assumes that any rename/move operation can be successfully performed (sent to the caller) once all previous inodes (those with a smaller inode number than the one we're currently processing) were processed. This is not true when an incremental send had to process an hierarchical change between 2 snapshots where the parent-children relationship between directory inodes was reversed - that is, parents became children and children became parents. This situation made the path building code go into an infinite loop, which kept allocating more and more memory that eventually lead to a krealloc warning being displayed in dmesg: WARNING: CPU: 1 PID: 5705 at mm/page_alloc.c:2477 __alloc_pages_nodemask+0x365/0xad0() Modules linked in: btrfs raid6_pq xor pci_stub vboxpci(O) vboxnetadp(O) vboxnetflt(O) vboxdrv(O) snd_hda_codec_hdmi snd_hda_codec_realtek joydev radeon snd_hda_intel snd_hda_codec snd_hwdep snd_seq_midi snd_pcm psmouse i915 snd_rawmidi serio_raw snd_seq_midi_event lpc_ich snd_seq snd_timer ttm snd_seq_device rfcomm drm_kms_helper parport_pc bnep bluetooth drm ppdev snd soundcore i2c_algo_bit snd_page_alloc binfmt_misc video lp parport r8169 mii hid_generic usbhid hid CPU: 1 PID: 5705 Comm: btrfs Tainted: G O 3.13.0-rc7-fdm-btrfs-next-18+ #3 Hardware name: To Be Filled By O.E.M. To Be Filled By O.E.M./Z77 Pro4, BIOS P1.50 09/04/2012 [ 5381.660441] 00000000000009ad ffff8806f6f2f4e8 ffffffff81777434 0000000000000007 [ 5381.660447] 0000000000000000 ffff8806f6f2f528 ffffffff8104a9ec ffff8807038f36f0 [ 5381.660452] 0000000000000000 0000000000000206 ffff8807038f2490 ffff8807038f36f0 [ 5381.660457] Call Trace: [ 5381.660464] [<ffffffff81777434>] dump_stack+0x4e/0x68 [ 5381.660471] [<ffffffff8104a9ec>] warn_slowpath_common+0x8c/0xc0 [ 5381.660476] [<ffffffff8104aa3a>] warn_slowpath_null+0x1a/0x20 [ 5381.660480] [<ffffffff81144995>] __alloc_pages_nodemask+0x365/0xad0 [ 5381.660487] [<ffffffff8108313f>] ? local_clock+0x4f/0x60 [ 5381.660491] [<ffffffff811430e8>] ? free_one_page+0x98/0x440 [ 5381.660495] [<ffffffff8108313f>] ? local_clock+0x4f/0x60 [ 5381.660502] [<ffffffff8113fae4>] ? __get_free_pages+0x14/0x50 [ 5381.660508] [<ffffffff81095fb8>] ? trace_hardirqs_off_caller+0x28/0xd0 [ 5381.660515] [<ffffffff81183caf>] alloc_pages_current+0x10f/0x1f0 [ 5381.660520] [<ffffffff8113fae4>] ? __get_free_pages+0x14/0x50 [ 5381.660524] [<ffffffff8113fae4>] __get_free_pages+0x14/0x50 [ 5381.660530] [<ffffffff8115dace>] kmalloc_order_trace+0x3e/0x100 [ 5381.660536] [<ffffffff81191ea0>] __kmalloc_track_caller+0x220/0x230 [ 5381.660560] [<ffffffffa0729fdb>] ? fs_path_ensure_buf.part.12+0x6b/0x200 [btrfs] [ 5381.660564] [<ffffffff8178085c>] ? retint_restore_args+0xe/0xe [ 5381.660569] [<ffffffff811580ef>] krealloc+0x6f/0xb0 [ 5381.660586] [<ffffffffa0729fdb>] fs_path_ensure_buf.part.12+0x6b/0x200 [btrfs] [ 5381.660601] [<ffffffffa072a208>] fs_path_prepare_for_add+0x98/0xb0 [btrfs] [ 5381.660615] [<ffffffffa072a2bc>] fs_path_add_path+0x2c/0x60 [btrfs] [ 5381.660628] [<ffffffffa072c55c>] get_cur_path+0x7c/0x1c0 [btrfs] Even without this loop, the incremental send couldn't succeed, because it would attempt to send a rename/move operation for the lower inode before the highest inode number was renamed/move. This issue is easy to trigger with the following steps: $ mkfs.btrfs -f /dev/sdb3 $ mount /dev/sdb3 /mnt/btrfs $ mkdir -p /mnt/btrfs/a/b/c/d $ mkdir /mnt/btrfs/a/b/c2 $ btrfs subvol snapshot -r /mnt/btrfs /mnt/btrfs/snap1 $ mv /mnt/btrfs/a/b/c/d /mnt/btrfs/a/b/c2/d2 $ mv /mnt/btrfs/a/b/c /mnt/btrfs/a/b/c2/d2/cc $ btrfs subvol snapshot -r /mnt/btrfs /mnt/btrfs/snap2 $ btrfs send -p /mnt/btrfs/snap1 /mnt/btrfs/snap2 > /tmp/incremental.send The structure of the filesystem when the first snapshot is taken is: . (ino 256) |-- a (ino 257) |-- b (ino 258) |-- c (ino 259) | |-- d (ino 260) | |-- c2 (ino 261) And its structure when the second snapshot is taken is: . (ino 256) |-- a (ino 257) |-- b (ino 258) |-- c2 (ino 261) |-- d2 (ino 260) |-- cc (ino 259) Before the move/rename operation is performed for the inode 259, the move/rename for inode 260 must be performed, since 259 is now a child of 260. A test case for xfstests, with a more complex scenario, will follow soon. Signed-off-by: Filipe David Borba Manana <fdmanana@gmail.com> Signed-off-by: Josef Bacik <jbacik@fb.com> Signed-off-by: Chris Mason <clm@fb.com>
2014-01-22 10:00:53 +00:00
Btrfs: incremental send, don't rename a directory too soon There's one more case where we can't issue a rename operation for a directory as soon as we process it. We used to delay directory renames only if they have some ancestor directory with a higher inode number that got renamed too, but there's another case where we need to delay the rename too - when a directory A is renamed to the old name of a directory B but that directory B has its rename delayed because it has now (in the send root) an ancestor with a higher inode number that was renamed. If we don't delay the directory rename in this case, the receiving end of the send stream will attempt to rename A to the old name of B before B got renamed to its new name, which results in a "directory not empty" error. So fix this by delaying directory renames for this case too. Steps to reproduce: $ mkfs.btrfs -f /dev/sdb $ mount /dev/sdb /mnt $ mkdir /mnt/a $ mkdir /mnt/b $ mkdir /mnt/c $ touch /mnt/a/file $ btrfs subvolume snapshot -r /mnt /mnt/snap1 $ mv /mnt/c /mnt/x $ mv /mnt/a /mnt/x/y $ mv /mnt/b /mnt/a $ btrfs subvolume snapshot -r /mnt /mnt/snap2 $ btrfs send /mnt/snap1 -f /tmp/1.send $ btrfs send -p /mnt/snap1 /mnt/snap2 -f /tmp/2.send $ mkfs.btrfs -f /dev/sdc $ mount /dev/sdc /mnt2 $ btrfs receive /mnt2 -f /tmp/1.send $ btrfs receive /mnt2 -f /tmp/2.send ERROR: rename b -> a failed. Directory not empty A test case for xfstests follows soon. Reported-by: Ames Cornish <ames@cornishes.net> Signed-off-by: Filipe Manana <fdmanana@suse.com> Signed-off-by: Chris Mason <clm@fb.com>
2015-02-28 22:29:22 +00:00
Btrfs: fix infinite path build loops in incremental send The send operation processes inodes by their ascending number, and assumes that any rename/move operation can be successfully performed (sent to the caller) once all previous inodes (those with a smaller inode number than the one we're currently processing) were processed. This is not true when an incremental send had to process an hierarchical change between 2 snapshots where the parent-children relationship between directory inodes was reversed - that is, parents became children and children became parents. This situation made the path building code go into an infinite loop, which kept allocating more and more memory that eventually lead to a krealloc warning being displayed in dmesg: WARNING: CPU: 1 PID: 5705 at mm/page_alloc.c:2477 __alloc_pages_nodemask+0x365/0xad0() Modules linked in: btrfs raid6_pq xor pci_stub vboxpci(O) vboxnetadp(O) vboxnetflt(O) vboxdrv(O) snd_hda_codec_hdmi snd_hda_codec_realtek joydev radeon snd_hda_intel snd_hda_codec snd_hwdep snd_seq_midi snd_pcm psmouse i915 snd_rawmidi serio_raw snd_seq_midi_event lpc_ich snd_seq snd_timer ttm snd_seq_device rfcomm drm_kms_helper parport_pc bnep bluetooth drm ppdev snd soundcore i2c_algo_bit snd_page_alloc binfmt_misc video lp parport r8169 mii hid_generic usbhid hid CPU: 1 PID: 5705 Comm: btrfs Tainted: G O 3.13.0-rc7-fdm-btrfs-next-18+ #3 Hardware name: To Be Filled By O.E.M. To Be Filled By O.E.M./Z77 Pro4, BIOS P1.50 09/04/2012 [ 5381.660441] 00000000000009ad ffff8806f6f2f4e8 ffffffff81777434 0000000000000007 [ 5381.660447] 0000000000000000 ffff8806f6f2f528 ffffffff8104a9ec ffff8807038f36f0 [ 5381.660452] 0000000000000000 0000000000000206 ffff8807038f2490 ffff8807038f36f0 [ 5381.660457] Call Trace: [ 5381.660464] [<ffffffff81777434>] dump_stack+0x4e/0x68 [ 5381.660471] [<ffffffff8104a9ec>] warn_slowpath_common+0x8c/0xc0 [ 5381.660476] [<ffffffff8104aa3a>] warn_slowpath_null+0x1a/0x20 [ 5381.660480] [<ffffffff81144995>] __alloc_pages_nodemask+0x365/0xad0 [ 5381.660487] [<ffffffff8108313f>] ? local_clock+0x4f/0x60 [ 5381.660491] [<ffffffff811430e8>] ? free_one_page+0x98/0x440 [ 5381.660495] [<ffffffff8108313f>] ? local_clock+0x4f/0x60 [ 5381.660502] [<ffffffff8113fae4>] ? __get_free_pages+0x14/0x50 [ 5381.660508] [<ffffffff81095fb8>] ? trace_hardirqs_off_caller+0x28/0xd0 [ 5381.660515] [<ffffffff81183caf>] alloc_pages_current+0x10f/0x1f0 [ 5381.660520] [<ffffffff8113fae4>] ? __get_free_pages+0x14/0x50 [ 5381.660524] [<ffffffff8113fae4>] __get_free_pages+0x14/0x50 [ 5381.660530] [<ffffffff8115dace>] kmalloc_order_trace+0x3e/0x100 [ 5381.660536] [<ffffffff81191ea0>] __kmalloc_track_caller+0x220/0x230 [ 5381.660560] [<ffffffffa0729fdb>] ? fs_path_ensure_buf.part.12+0x6b/0x200 [btrfs] [ 5381.660564] [<ffffffff8178085c>] ? retint_restore_args+0xe/0xe [ 5381.660569] [<ffffffff811580ef>] krealloc+0x6f/0xb0 [ 5381.660586] [<ffffffffa0729fdb>] fs_path_ensure_buf.part.12+0x6b/0x200 [btrfs] [ 5381.660601] [<ffffffffa072a208>] fs_path_prepare_for_add+0x98/0xb0 [btrfs] [ 5381.660615] [<ffffffffa072a2bc>] fs_path_add_path+0x2c/0x60 [btrfs] [ 5381.660628] [<ffffffffa072c55c>] get_cur_path+0x7c/0x1c0 [btrfs] Even without this loop, the incremental send couldn't succeed, because it would attempt to send a rename/move operation for the lower inode before the highest inode number was renamed/move. This issue is easy to trigger with the following steps: $ mkfs.btrfs -f /dev/sdb3 $ mount /dev/sdb3 /mnt/btrfs $ mkdir -p /mnt/btrfs/a/b/c/d $ mkdir /mnt/btrfs/a/b/c2 $ btrfs subvol snapshot -r /mnt/btrfs /mnt/btrfs/snap1 $ mv /mnt/btrfs/a/b/c/d /mnt/btrfs/a/b/c2/d2 $ mv /mnt/btrfs/a/b/c /mnt/btrfs/a/b/c2/d2/cc $ btrfs subvol snapshot -r /mnt/btrfs /mnt/btrfs/snap2 $ btrfs send -p /mnt/btrfs/snap1 /mnt/btrfs/snap2 > /tmp/incremental.send The structure of the filesystem when the first snapshot is taken is: . (ino 256) |-- a (ino 257) |-- b (ino 258) |-- c (ino 259) | |-- d (ino 260) | |-- c2 (ino 261) And its structure when the second snapshot is taken is: . (ino 256) |-- a (ino 257) |-- b (ino 258) |-- c2 (ino 261) |-- d2 (ino 260) |-- cc (ino 259) Before the move/rename operation is performed for the inode 259, the move/rename for inode 260 must be performed, since 259 is now a child of 260. A test case for xfstests, with a more complex scenario, will follow soon. Signed-off-by: Filipe David Borba Manana <fdmanana@gmail.com> Signed-off-by: Josef Bacik <jbacik@fb.com> Signed-off-by: Chris Mason <clm@fb.com>
2014-01-22 10:00:53 +00:00
Btrfs: fix send attempting to rmdir non-empty directories The incremental send algorithm assumed that it was possible to issue a directory remove (rmdir) if the the inode number it was currently processing was greater than (or equal) to any inode that referenced the directory's inode. This wasn't a valid assumption because any such inode might be a child directory that is pending a move/rename operation, because it was moved into a directory that has a higher inode number and was moved/renamed too - in other words, the case the following commit addressed: 9f03740a956d7ac6a1b8f8c455da6fa5cae11c22 (Btrfs: fix infinite path build loops in incremental send) This made an incremental send issue an rmdir operation before the target directory was actually empty, which made btrfs receive fail. Therefore it needs to wait for all pending child directory inodes to be moved/renamed before sending an rmdir operation. Simple steps to reproduce this issue: $ mkfs.btrfs -f /dev/sdb3 $ mount /dev/sdb3 /mnt/btrfs $ mkdir -p /mnt/btrfs/a/b/c/x $ mkdir /mnt/btrfs/a/b/y $ btrfs subvolume snapshot -r /mnt/btrfs /mnt/btrfs/snap1 $ btrfs send /mnt/btrfs/snap1 -f /tmp/base.send $ mv /mnt/btrfs/a/b/y /mnt/btrfs/a/b/YY $ mv /mnt/btrfs/a/b/c/x /mnt/btrfs/a/b/YY $ rmdir /mnt/btrfs/a/b/c $ btrfs subvolume snapshot -r /mnt/btrfs /mnt/btrfs/snap2 $ btrfs send -p /mnt/btrfs/snap1 /mnt/btrfs/snap2 -f /tmp/incremental.send $ umount /mnt/btrfs $ mkfs.btrfs -f /dev/sdb3 $ mount /dev/sdb3 /mnt/btrfs $ btrfs receive /mnt/btrfs -f /tmp/base.send $ btrfs receive /mnt/btrfs -f /tmp/incremental.send The second btrfs receive command failed with: ERROR: rmdir o259-6-0 failed. Directory not empty A test case for xfstests follows. Signed-off-by: Filipe David Borba Manana <fdmanana@gmail.com> Signed-off-by: Josef Bacik <jbacik@fb.com>
2014-02-19 14:31:44 +00:00
Btrfs: incremental send, check if orphanized dir inode needs delayed rename If a directory inode is orphanized, because some inode previously processed has a new name that collides with the old name of the current inode, we need to check if it needs its rename operation delayed too, as its ancestor-descendent relationship with some other inode might have been reversed between the parent and send snapshots and therefore its rename operation needs to happen after that other inode is renamed. For example, for the following reproducer where this is needed (provided by Robbie Ko): $ mkfs.btrfs -f /dev/sdb $ mount /dev/sdb /mnt $ mkfs.btrfs -f /dev/sdc $ mount /dev/sdc /mnt2 $ mkdir -p /mnt/data/n1/n2 $ mkdir /mnt/data/n4 $ mkdir -p /mnt/data/t6/t7 $ mkdir /mnt/data/t5 $ mkdir /mnt/data/t7 $ mkdir /mnt/data/n4/t2 $ mkdir /mnt/data/t4 $ mkdir /mnt/data/t3 $ mv /mnt/data/t7 /mnt/data/n4/t2 $ mv /mnt/data/t4 /mnt/data/n4/t2/t7 $ mv /mnt/data/t5 /mnt/data/n4/t2/t7/t4 $ mv /mnt/data/t6 /mnt/data/n4/t2/t7/t4/t5 $ mv /mnt/data/n1/n2 /mnt/data/n4/t2/t7/t4/t5/t6 $ mv /mnt/data/n1 /mnt/data/n4/t2/t7/t4/t5/t6 $ mv /mnt/data/n4/t2/t7/t4/t5/t6/t7 /mnt/data/n4/t2/t7/t4/t5/t6/n2 $ mv /mnt/data/t3 /mnt/data/n4/t2/t7/t4/t5/t6/n2/t7 $ btrfs subvolume snapshot -r /mnt /mnt/snap1 $ mv /mnt/data/n4/t2/t7/t4/t5/t6/n1 /mnt/data/n4 $ mv /mnt/data/n4/t2 /mnt/data/n4/n1 $ mv /mnt/data/n4/n1/t2/t7/t4/t5/t6/n2 /mnt/data/n4/n1/t2 $ mv /mnt/data/n4/n1/t2/n2/t7/t3 /mnt/data/n4/n1/t2 $ mv /mnt/data/n4/n1/t2/t7/t4/t5/t6 /mnt/data/n4/n1/t2 $ mv /mnt/data/n4/n1/t2/t7/t4 /mnt/data/n4/n1/t2/t6 $ mv /mnt/data/n4/n1/t2/t7 /mnt/data/n4/n1/t2/t3 $ mv /mnt/data/n4/n1/t2/n2/t7 /mnt/data/n4/n1/t2 $ btrfs subvolume snapshot -r /mnt /mnt/snap2 $ btrfs send /mnt/snap1 | btrfs receive /mnt2 $ btrfs send -p /mnt/snap1 /mnt/snap2 | btrfs receive /mnt2 ERROR: send ioctl failed with -12: Cannot allocate memory Where the parent snapshot directory hierarchy is the following: . (ino 256) |-- data/ (ino 257) |-- n4/ (ino 260) |-- t2/ (ino 265) |-- t7/ (ino 264) |-- t4/ (ino 266) |-- t5/ (ino 263) |-- t6/ (ino 261) |-- n1/ (ino 258) |-- n2/ (ino 259) |-- t7/ (ino 262) |-- t3/ (ino 267) And the send snapshot's directory hierarchy is the following: . (ino 256) |-- data/ (ino 257) |-- n4/ (ino 260) |-- n1/ (ino 258) |-- t2/ (ino 265) |-- n2/ (ino 259) |-- t3/ (ino 267) | |-- t7 (ino 264) | |-- t6/ (ino 261) | |-- t4/ (ino 266) | |-- t5/ (ino 263) | |-- t7/ (ino 262) While processing inode 262 we orphanize inode 264 and later attempt to rename inode 264 to its new name/location, which resulted in building an incorrect destination path string for the rename operation with the value "data/n4/t2/t7/t4/t5/t6/n2/t7/t3/t7". This rename operation must have been done only after inode 267 is processed and renamed, as the ancestor-descendent relationship between inodes 264 and 267 was reversed between both snapshots, because otherwise it results in an infinite loop when building the path string for inode 264 when we are processing an inode with a number larger than 264. That loop is the following: start inode 264, send progress of 265 for example parent of 264 -> 267 parent of 267 -> 262 parent of 262 -> 259 parent of 259 -> 261 parent of 261 -> 263 parent of 263 -> 266 parent of 266 -> 264 |--> back to first iteration while current path string length is <= PATH_MAX, and fail with -ENOMEM otherwise So fix this by making the check if we need to delay a directory rename regardless of the current inode having been orphanized or not. A test case for fstests follows soon. Thanks to Robbie Ko for providing a reproducer for this problem. Reported-by: Robbie Ko <robbieko@synology.com> Signed-off-by: Filipe Manana <fdmanana@suse.com>
2015-04-09 14:09:14 +01:00
Btrfs: fix send attempting to rmdir non-empty directories The incremental send algorithm assumed that it was possible to issue a directory remove (rmdir) if the the inode number it was currently processing was greater than (or equal) to any inode that referenced the directory's inode. This wasn't a valid assumption because any such inode might be a child directory that is pending a move/rename operation, because it was moved into a directory that has a higher inode number and was moved/renamed too - in other words, the case the following commit addressed: 9f03740a956d7ac6a1b8f8c455da6fa5cae11c22 (Btrfs: fix infinite path build loops in incremental send) This made an incremental send issue an rmdir operation before the target directory was actually empty, which made btrfs receive fail. Therefore it needs to wait for all pending child directory inodes to be moved/renamed before sending an rmdir operation. Simple steps to reproduce this issue: $ mkfs.btrfs -f /dev/sdb3 $ mount /dev/sdb3 /mnt/btrfs $ mkdir -p /mnt/btrfs/a/b/c/x $ mkdir /mnt/btrfs/a/b/y $ btrfs subvolume snapshot -r /mnt/btrfs /mnt/btrfs/snap1 $ btrfs send /mnt/btrfs/snap1 -f /tmp/base.send $ mv /mnt/btrfs/a/b/y /mnt/btrfs/a/b/YY $ mv /mnt/btrfs/a/b/c/x /mnt/btrfs/a/b/YY $ rmdir /mnt/btrfs/a/b/c $ btrfs subvolume snapshot -r /mnt/btrfs /mnt/btrfs/snap2 $ btrfs send -p /mnt/btrfs/snap1 /mnt/btrfs/snap2 -f /tmp/incremental.send $ umount /mnt/btrfs $ mkfs.btrfs -f /dev/sdb3 $ mount /dev/sdb3 /mnt/btrfs $ btrfs receive /mnt/btrfs -f /tmp/base.send $ btrfs receive /mnt/btrfs -f /tmp/incremental.send The second btrfs receive command failed with: ERROR: rmdir o259-6-0 failed. Directory not empty A test case for xfstests follows. Signed-off-by: Filipe David Borba Manana <fdmanana@gmail.com> Signed-off-by: Josef Bacik <jbacik@fb.com>
2014-02-19 14:31:44 +00:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: fix use of radix_tree for name_cache in send/receive We can't easily use the index of the radix tree for inums as the radix tree uses 32bit indexes on 32bit kernels. For 32bit kernels, we now use the lower 32bit of the inum as index and an additional list to store multiple entries per radix tree entry. Reported-by: Arne Jansen <sensille@gmx.net> Signed-off-by: Alexander Block <ablock84@googlemail.com>
2012-07-28 14:20:58 +02:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: fix infinite path build loops in incremental send The send operation processes inodes by their ascending number, and assumes that any rename/move operation can be successfully performed (sent to the caller) once all previous inodes (those with a smaller inode number than the one we're currently processing) were processed. This is not true when an incremental send had to process an hierarchical change between 2 snapshots where the parent-children relationship between directory inodes was reversed - that is, parents became children and children became parents. This situation made the path building code go into an infinite loop, which kept allocating more and more memory that eventually lead to a krealloc warning being displayed in dmesg: WARNING: CPU: 1 PID: 5705 at mm/page_alloc.c:2477 __alloc_pages_nodemask+0x365/0xad0() Modules linked in: btrfs raid6_pq xor pci_stub vboxpci(O) vboxnetadp(O) vboxnetflt(O) vboxdrv(O) snd_hda_codec_hdmi snd_hda_codec_realtek joydev radeon snd_hda_intel snd_hda_codec snd_hwdep snd_seq_midi snd_pcm psmouse i915 snd_rawmidi serio_raw snd_seq_midi_event lpc_ich snd_seq snd_timer ttm snd_seq_device rfcomm drm_kms_helper parport_pc bnep bluetooth drm ppdev snd soundcore i2c_algo_bit snd_page_alloc binfmt_misc video lp parport r8169 mii hid_generic usbhid hid CPU: 1 PID: 5705 Comm: btrfs Tainted: G O 3.13.0-rc7-fdm-btrfs-next-18+ #3 Hardware name: To Be Filled By O.E.M. To Be Filled By O.E.M./Z77 Pro4, BIOS P1.50 09/04/2012 [ 5381.660441] 00000000000009ad ffff8806f6f2f4e8 ffffffff81777434 0000000000000007 [ 5381.660447] 0000000000000000 ffff8806f6f2f528 ffffffff8104a9ec ffff8807038f36f0 [ 5381.660452] 0000000000000000 0000000000000206 ffff8807038f2490 ffff8807038f36f0 [ 5381.660457] Call Trace: [ 5381.660464] [<ffffffff81777434>] dump_stack+0x4e/0x68 [ 5381.660471] [<ffffffff8104a9ec>] warn_slowpath_common+0x8c/0xc0 [ 5381.660476] [<ffffffff8104aa3a>] warn_slowpath_null+0x1a/0x20 [ 5381.660480] [<ffffffff81144995>] __alloc_pages_nodemask+0x365/0xad0 [ 5381.660487] [<ffffffff8108313f>] ? local_clock+0x4f/0x60 [ 5381.660491] [<ffffffff811430e8>] ? free_one_page+0x98/0x440 [ 5381.660495] [<ffffffff8108313f>] ? local_clock+0x4f/0x60 [ 5381.660502] [<ffffffff8113fae4>] ? __get_free_pages+0x14/0x50 [ 5381.660508] [<ffffffff81095fb8>] ? trace_hardirqs_off_caller+0x28/0xd0 [ 5381.660515] [<ffffffff81183caf>] alloc_pages_current+0x10f/0x1f0 [ 5381.660520] [<ffffffff8113fae4>] ? __get_free_pages+0x14/0x50 [ 5381.660524] [<ffffffff8113fae4>] __get_free_pages+0x14/0x50 [ 5381.660530] [<ffffffff8115dace>] kmalloc_order_trace+0x3e/0x100 [ 5381.660536] [<ffffffff81191ea0>] __kmalloc_track_caller+0x220/0x230 [ 5381.660560] [<ffffffffa0729fdb>] ? fs_path_ensure_buf.part.12+0x6b/0x200 [btrfs] [ 5381.660564] [<ffffffff8178085c>] ? retint_restore_args+0xe/0xe [ 5381.660569] [<ffffffff811580ef>] krealloc+0x6f/0xb0 [ 5381.660586] [<ffffffffa0729fdb>] fs_path_ensure_buf.part.12+0x6b/0x200 [btrfs] [ 5381.660601] [<ffffffffa072a208>] fs_path_prepare_for_add+0x98/0xb0 [btrfs] [ 5381.660615] [<ffffffffa072a2bc>] fs_path_add_path+0x2c/0x60 [btrfs] [ 5381.660628] [<ffffffffa072c55c>] get_cur_path+0x7c/0x1c0 [btrfs] Even without this loop, the incremental send couldn't succeed, because it would attempt to send a rename/move operation for the lower inode before the highest inode number was renamed/move. This issue is easy to trigger with the following steps: $ mkfs.btrfs -f /dev/sdb3 $ mount /dev/sdb3 /mnt/btrfs $ mkdir -p /mnt/btrfs/a/b/c/d $ mkdir /mnt/btrfs/a/b/c2 $ btrfs subvol snapshot -r /mnt/btrfs /mnt/btrfs/snap1 $ mv /mnt/btrfs/a/b/c/d /mnt/btrfs/a/b/c2/d2 $ mv /mnt/btrfs/a/b/c /mnt/btrfs/a/b/c2/d2/cc $ btrfs subvol snapshot -r /mnt/btrfs /mnt/btrfs/snap2 $ btrfs send -p /mnt/btrfs/snap1 /mnt/btrfs/snap2 > /tmp/incremental.send The structure of the filesystem when the first snapshot is taken is: . (ino 256) |-- a (ino 257) |-- b (ino 258) |-- c (ino 259) | |-- d (ino 260) | |-- c2 (ino 261) And its structure when the second snapshot is taken is: . (ino 256) |-- a (ino 257) |-- b (ino 258) |-- c2 (ino 261) |-- d2 (ino 260) |-- cc (ino 259) Before the move/rename operation is performed for the inode 259, the move/rename for inode 260 must be performed, since 259 is now a child of 260. A test case for xfstests, with a more complex scenario, will follow soon. Signed-off-by: Filipe David Borba Manana <fdmanana@gmail.com> Signed-off-by: Josef Bacik <jbacik@fb.com> Signed-off-by: Chris Mason <clm@fb.com>
2014-01-22 10:00:53 +00:00
Btrfs: fix send attempting to rmdir non-empty directories The incremental send algorithm assumed that it was possible to issue a directory remove (rmdir) if the the inode number it was currently processing was greater than (or equal) to any inode that referenced the directory's inode. This wasn't a valid assumption because any such inode might be a child directory that is pending a move/rename operation, because it was moved into a directory that has a higher inode number and was moved/renamed too - in other words, the case the following commit addressed: 9f03740a956d7ac6a1b8f8c455da6fa5cae11c22 (Btrfs: fix infinite path build loops in incremental send) This made an incremental send issue an rmdir operation before the target directory was actually empty, which made btrfs receive fail. Therefore it needs to wait for all pending child directory inodes to be moved/renamed before sending an rmdir operation. Simple steps to reproduce this issue: $ mkfs.btrfs -f /dev/sdb3 $ mount /dev/sdb3 /mnt/btrfs $ mkdir -p /mnt/btrfs/a/b/c/x $ mkdir /mnt/btrfs/a/b/y $ btrfs subvolume snapshot -r /mnt/btrfs /mnt/btrfs/snap1 $ btrfs send /mnt/btrfs/snap1 -f /tmp/base.send $ mv /mnt/btrfs/a/b/y /mnt/btrfs/a/b/YY $ mv /mnt/btrfs/a/b/c/x /mnt/btrfs/a/b/YY $ rmdir /mnt/btrfs/a/b/c $ btrfs subvolume snapshot -r /mnt/btrfs /mnt/btrfs/snap2 $ btrfs send -p /mnt/btrfs/snap1 /mnt/btrfs/snap2 -f /tmp/incremental.send $ umount /mnt/btrfs $ mkfs.btrfs -f /dev/sdb3 $ mount /dev/sdb3 /mnt/btrfs $ btrfs receive /mnt/btrfs -f /tmp/base.send $ btrfs receive /mnt/btrfs -f /tmp/incremental.send The second btrfs receive command failed with: ERROR: rmdir o259-6-0 failed. Directory not empty A test case for xfstests follows. Signed-off-by: Filipe David Borba Manana <fdmanana@gmail.com> Signed-off-by: Josef Bacik <jbacik@fb.com>
2014-02-19 14:31:44 +00:00
Btrfs: incompatible format change to remove hole extents Btrfs has always had these filler extent data items for holes in inodes. This has made somethings very easy, like logging hole punches and sending hole punches. However for large holey files these extent data items are pure overhead. So add an incompatible feature to no longer add hole extents to reduce the amount of metadata used by these sort of files. This has a few changes for logging and send obviously since they will need to detect holes and log/send the holes if there are any. I've tested this thoroughly with xfstests and it doesn't cause any issues with and without the incompat format set. Thanks, Signed-off-by: Josef Bacik <jbacik@fusionio.com> Signed-off-by: Chris Mason <clm@fb.com>
2013-10-22 12:18:51 -04:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: cleanup unused arguments in send.c sctx is removed from the argument of the function that doesn't use sctx. Signed-off-by: Tsutomu Itoh <t-itoh@jp.fujitsu.com> Signed-off-by: Josef Bacik <jbacik@fusionio.com>
2013-05-08 07:51:52 +00:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: cleanup unused arguments in send.c sctx is removed from the argument of the function that doesn't use sctx. Signed-off-by: Tsutomu Itoh <t-itoh@jp.fujitsu.com> Signed-off-by: Josef Bacik <jbacik@fusionio.com>
2013-05-08 07:51:52 +00:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: cleanup unused arguments in send.c sctx is removed from the argument of the function that doesn't use sctx. Signed-off-by: Tsutomu Itoh <t-itoh@jp.fujitsu.com> Signed-off-by: Josef Bacik <jbacik@fusionio.com>
2013-05-08 07:51:52 +00:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: cleanup unused arguments in send.c sctx is removed from the argument of the function that doesn't use sctx. Signed-off-by: Tsutomu Itoh <t-itoh@jp.fujitsu.com> Signed-off-by: Josef Bacik <jbacik@fusionio.com>
2013-05-08 07:51:52 +00:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
btrfs: send: lower memory requirements in common case The fs_path structure uses an inline buffer and falls back to a chain of allocations, but vmalloc is not necessary because PATH_MAX fits into PAGE_SIZE. The size of fs_path has been reduced to 256 bytes from PAGE_SIZE, usually 4k. Experimental measurements show that most paths on a single filesystem do not exceed 200 bytes, and these get stored into the inline buffer directly, which is now 230 bytes. Longer paths are kmalloced when needed. Signed-off-by: David Sterba <dsterba@suse.cz> Signed-off-by: Josef Bacik <jbacik@fb.com>
2014-02-05 16:17:34 +01:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: limit the path size in send to PATH_MAX fs_path_ensure_buf is used to make sure our path buffers for send are big enough for the path names as we construct them. The buffer size is limited to 32K by the length field in the struct. But bugs in the path construction can end up trying to build a huge buffer, and we'll do invalid memmmoves when the buffer length field wraps. This patch is step one, preventing the overflows. Signed-off-by: Chris Mason <clm@fb.com>
2014-04-26 05:02:03 -07:00
btrfs: send: fix old buffer length in fs_path_ensure_buf In "btrfs: send: lower memory requirements in common case" the code to save the old_buf_len was incorrectly moved to a wrong place and broke the original logic. Reported-by: Filipe David Manana <fdmanana@gmail.com> Signed-off-by: David Sterba <dsterba@suse.cz> Reviewed-by: Filipe David Manana <fdmanana@gmail.com> Signed-off-by: Josef Bacik <jbacik@fb.com>
2014-02-25 19:32:59 +01:00
btrfs: send: lower memory requirements in common case The fs_path structure uses an inline buffer and falls back to a chain of allocations, but vmalloc is not necessary because PATH_MAX fits into PAGE_SIZE. The size of fs_path has been reduced to 256 bytes from PAGE_SIZE, usually 4k. Experimental measurements show that most paths on a single filesystem do not exceed 200 bytes, and these get stored into the inline buffer directly, which is now 230 bytes. Longer paths are kmalloced when needed. Signed-off-by: David Sterba <dsterba@suse.cz> Signed-off-by: Josef Bacik <jbacik@fb.com>
2014-02-05 16:17:34 +01:00
Btrfs: send, fix corrupted path strings for long paths If a path has more than 230 characters, we allocate a new buffer to use for the path, but we were forgotting to copy the contents of the previous buffer into the new one, which has random content from the kmalloc call. Test: mkfs.btrfs -f /dev/sdd mount /dev/sdd /mnt TEST_PATH="/mnt/fdmanana/.config/google-chrome-mysetup/Default/Pepper_Data/Shockwave_Flash/WritableRoot/#SharedObjects/JSHJ4ZKN/s.wsj.net/[[IMPORT]]/players.edgesuite.net/flash/plugins/osmf/advanced-streaming-plugin/v2.7/osmf1.6/Ak#" mkdir -p $TEST_PATH echo "hello world" > $TEST_PATH/amaiAdvancedStreamingPlugin.txt btrfs subvolume snapshot -r /mnt /mnt/mysnap1 btrfs send /mnt/mysnap1 -f /tmp/1.snap A test for xfstests follows. Signed-off-by: Filipe David Borba Manana <fdmanana@gmail.com> Cc: Marc Merlin <marc@merlins.org> Tested-by: Marc MERLIN <marc@merlins.org> Signed-off-by: Chris Mason <clm@fb.com>
2014-05-21 17:38:13 +01:00
btrfs: send: simplify allocation code in fs_path_ensure_buf Signed-off-by: David Sterba <dsterba@suse.cz> Signed-off-by: Josef Bacik <jbacik@fb.com>
2014-02-25 19:33:08 +01:00
Btrfs: send, fix corrupted path strings for long paths If a path has more than 230 characters, we allocate a new buffer to use for the path, but we were forgotting to copy the contents of the previous buffer into the new one, which has random content from the kmalloc call. Test: mkfs.btrfs -f /dev/sdd mount /dev/sdd /mnt TEST_PATH="/mnt/fdmanana/.config/google-chrome-mysetup/Default/Pepper_Data/Shockwave_Flash/WritableRoot/#SharedObjects/JSHJ4ZKN/s.wsj.net/[[IMPORT]]/players.edgesuite.net/flash/plugins/osmf/advanced-streaming-plugin/v2.7/osmf1.6/Ak#" mkdir -p $TEST_PATH echo "hello world" > $TEST_PATH/amaiAdvancedStreamingPlugin.txt btrfs subvolume snapshot -r /mnt /mnt/mysnap1 btrfs send /mnt/mysnap1 -f /tmp/1.snap A test for xfstests follows. Signed-off-by: Filipe David Borba Manana <fdmanana@gmail.com> Cc: Marc Merlin <marc@merlins.org> Tested-by: Marc MERLIN <marc@merlins.org> Signed-off-by: Chris Mason <clm@fb.com>
2014-05-21 17:38:13 +01:00
btrfs: send: simplify allocation code in fs_path_ensure_buf Signed-off-by: David Sterba <dsterba@suse.cz> Signed-off-by: Josef Bacik <jbacik@fb.com>
2014-02-25 19:33:08 +01:00
Btrfs: send, fix corrupted path strings for long paths If a path has more than 230 characters, we allocate a new buffer to use for the path, but we were forgotting to copy the contents of the previous buffer into the new one, which has random content from the kmalloc call. Test: mkfs.btrfs -f /dev/sdd mount /dev/sdd /mnt TEST_PATH="/mnt/fdmanana/.config/google-chrome-mysetup/Default/Pepper_Data/Shockwave_Flash/WritableRoot/#SharedObjects/JSHJ4ZKN/s.wsj.net/[[IMPORT]]/players.edgesuite.net/flash/plugins/osmf/advanced-streaming-plugin/v2.7/osmf1.6/Ak#" mkdir -p $TEST_PATH echo "hello world" > $TEST_PATH/amaiAdvancedStreamingPlugin.txt btrfs subvolume snapshot -r /mnt /mnt/mysnap1 btrfs send /mnt/mysnap1 -f /tmp/1.snap A test for xfstests follows. Signed-off-by: Filipe David Borba Manana <fdmanana@gmail.com> Cc: Marc Merlin <marc@merlins.org> Tested-by: Marc MERLIN <marc@merlins.org> Signed-off-by: Chris Mason <clm@fb.com>
2014-05-21 17:38:13 +01:00
btrfs: send: simplify allocation code in fs_path_ensure_buf Signed-off-by: David Sterba <dsterba@suse.cz> Signed-off-by: Josef Bacik <jbacik@fb.com>
2014-02-25 19:33:08 +01:00
btrfs: send: lower memory requirements in common case The fs_path structure uses an inline buffer and falls back to a chain of allocations, but vmalloc is not necessary because PATH_MAX fits into PAGE_SIZE. The size of fs_path has been reduced to 256 bytes from PAGE_SIZE, usually 4k. Experimental measurements show that most paths on a single filesystem do not exceed 200 bytes, and these get stored into the inline buffer directly, which is now 230 bytes. Longer paths are kmalloced when needed. Signed-off-by: David Sterba <dsterba@suse.cz> Signed-off-by: Josef Bacik <jbacik@fb.com>
2014-02-05 16:17:34 +01:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
btrfs: send: remove prepared member from fs_path The member is used only to return value back from fs_path_prepare_for_add, we can do it locally and save 8 bytes for the inline_buf path. Signed-off-by: David Sterba <dsterba@suse.cz> Signed-off-by: Josef Bacik <jbacik@fb.com>
2014-02-03 19:23:19 +01:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
btrfs: send: remove prepared member from fs_path The member is used only to return value back from fs_path_prepare_for_add, we can do it locally and save 8 bytes for the inline_buf path. Signed-off-by: David Sterba <dsterba@suse.cz> Signed-off-by: Josef Bacik <jbacik@fb.com>
2014-02-03 19:23:19 +01:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
btrfs: send: remove prepared member from fs_path The member is used only to return value back from fs_path_prepare_for_add, we can do it locally and save 8 bytes for the inline_buf path. Signed-off-by: David Sterba <dsterba@suse.cz> Signed-off-by: Josef Bacik <jbacik@fb.com>
2014-02-03 19:23:19 +01:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
btrfs: send: remove prepared member from fs_path The member is used only to return value back from fs_path_prepare_for_add, we can do it locally and save 8 bytes for the inline_buf path. Signed-off-by: David Sterba <dsterba@suse.cz> Signed-off-by: Josef Bacik <jbacik@fb.com>
2014-02-03 19:23:19 +01:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
btrfs: send: remove prepared member from fs_path The member is used only to return value back from fs_path_prepare_for_add, we can do it locally and save 8 bytes for the inline_buf path. Signed-off-by: David Sterba <dsterba@suse.cz> Signed-off-by: Josef Bacik <jbacik@fb.com>
2014-02-03 19:23:19 +01:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
btrfs: send: remove prepared member from fs_path The member is used only to return value back from fs_path_prepare_for_add, we can do it locally and save 8 bytes for the inline_buf path. Signed-off-by: David Sterba <dsterba@suse.cz> Signed-off-by: Josef Bacik <jbacik@fb.com>
2014-02-03 19:23:19 +01:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
btrfs: send: remove prepared member from fs_path The member is used only to return value back from fs_path_prepare_for_add, we can do it locally and save 8 bytes for the inline_buf path. Signed-off-by: David Sterba <dsterba@suse.cz> Signed-off-by: Josef Bacik <jbacik@fb.com>
2014-02-03 19:23:19 +01:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
btrfs: send: remove prepared member from fs_path The member is used only to return value back from fs_path_prepare_for_add, we can do it locally and save 8 bytes for the inline_buf path. Signed-off-by: David Sterba <dsterba@suse.cz> Signed-off-by: Josef Bacik <jbacik@fb.com>
2014-02-03 19:23:19 +01:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
btrfs: send: remove prepared member from fs_path The member is used only to return value back from fs_path_prepare_for_add, we can do it locally and save 8 bytes for the inline_buf path. Signed-off-by: David Sterba <dsterba@suse.cz> Signed-off-by: Josef Bacik <jbacik@fb.com>
2014-02-03 19:23:19 +01:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
btrfs: send: remove prepared member from fs_path The member is used only to return value back from fs_path_prepare_for_add, we can do it locally and save 8 bytes for the inline_buf path. Signed-off-by: David Sterba <dsterba@suse.cz> Signed-off-by: Josef Bacik <jbacik@fb.com>
2014-02-03 19:23:19 +01:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
btrfs: send: remove prepared member from fs_path The member is used only to return value back from fs_path_prepare_for_add, we can do it locally and save 8 bytes for the inline_buf path. Signed-off-by: David Sterba <dsterba@suse.cz> Signed-off-by: Josef Bacik <jbacik@fb.com>
2014-02-03 19:23:19 +01:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
btrfs: send: remove prepared member from fs_path The member is used only to return value back from fs_path_prepare_for_add, we can do it locally and save 8 bytes for the inline_buf path. Signed-off-by: David Sterba <dsterba@suse.cz> Signed-off-by: Josef Bacik <jbacik@fb.com>
2014-02-03 19:23:19 +01:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: hold the commit_root_sem when getting the commit root during send We currently rely too heavily on roots being read-only to save us from just accessing root->commit_root. We can easily balance blocks out from underneath a read only root, so to save us from getting screwed make sure we only access root->commit_root under the commit root sem. Thanks, Signed-off-by: Josef Bacik <jbacik@fb.com> Signed-off-by: Chris Mason <clm@fb.com>
2014-03-28 17:16:01 -04:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
btrfs: make static code static & remove dead code Big patch, but all it does is add statics to functions which are in fact static, then remove the associated dead-code fallout. removed functions: btrfs_iref_to_path() __btrfs_lookup_delayed_deletion_item() __btrfs_search_delayed_insertion_item() __btrfs_search_delayed_deletion_item() find_eb_for_page() btrfs_find_block_group() range_straddles_pages() extent_range_uptodate() btrfs_file_extent_length() btrfs_scrub_cancel_devid() btrfs_start_transaction_lflush() btrfs_print_tree() is left because it is used for debugging. btrfs_start_transaction_lflush() and btrfs_reada_detach() are left for symmetry. ulist.c functions are left, another patch will take care of those. Signed-off-by: Eric Sandeen <sandeen@redhat.com> Signed-off-by: Josef Bacik <jbacik@fusionio.com>
2013-04-25 20:41:01 +00:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: fix sparse warning Fix the following sparse warning: fs/btrfs/send.c:518:51: warning: incorrect type in argument 2 (different address spaces) fs/btrfs/send.c:518:51: expected char const [noderef] <asn:1>*<noident> fs/btrfs/send.c:518:51: got char * We can safely use (const char __user *) with set_fs(KERNEL_DS) __force added to avoid sparse-all warning: fs/btrfs/send.c:518:40: warning: cast adds address space to expression (<asn:1>) Signed-off-by: Fabian Frederick <fabf@skynet.be> Reviewed-by: Zach Brown <zab@zabbo.net> Signed-off-by: Chris Mason <clm@fb.com>
2014-07-15 21:17:17 +02:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
btrfs: send: clean up dead code Remove ifdefed code: - tlv_put for 8, 16 and 32, add a generic tempalte if needed in future - tlv_put_timespec - the btrfs_timespec fields are used - fs_path_remove obsoleted long ago Signed-off-by: David Sterba <dsterba@suse.cz> Signed-off-by: Josef Bacik <jbacik@fb.com> Signed-off-by: Chris Mason <clm@fb.com>
2013-12-16 17:34:10 +01:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
btrfs: send: clean up dead code Remove ifdefed code: - tlv_put for 8, 16 and 32, add a generic tempalte if needed in future - tlv_put_timespec - the btrfs_timespec fields are used - fs_path_remove obsoleted long ago Signed-off-by: David Sterba <dsterba@suse.cz> Signed-off-by: Josef Bacik <jbacik@fb.com> Signed-off-by: Chris Mason <clm@fb.com>
2013-12-16 17:34:10 +01:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: write_buf is now callable outside send.c Developing service cmds needs it. Signed-off-by: Anand Jain <anand.jain@oracle.com>
2012-09-14 00:04:21 -06:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
btrfs: Use WARN_ON()'s return value in place of WARN_ON(1) Use WARN_ON()'s return value in place of WARN_ON(1) for cleaner source code that outputs a more descriptive warnings. Also fix the styling warning of redundant braces that came up as a result of this fix. Signed-off-by: Dulshani Gunawardhana <dulshani.gunawardhana89@gmail.com> Reviewed-by: Zach Brown <zab@redhat.com> Signed-off-by: Josef Bacik <jbacik@fusionio.com> Signed-off-by: Chris Mason <chris.mason@fusionio.com>
2013-10-31 10:30:08 +05:30
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: use btrfs_crc32c everywhere instead of libcrc32c After the commit titled "Btrfs: fix btrfs boot when compiled as built-in", LIBCRC32C requirement was removed from btrfs' Kconfig. This made it not possible to build a kernel with btrfs enabled (either as module or built-in) if libcrc32c is not enabled as well. So just replace all uses of libcrc32c with the equivalent function in btrfs hash.h - btrfs_crc32c. Signed-off-by: Filipe David Borba Manana <fdmanana@gmail.com> Signed-off-by: Chris Mason <clm@fb.com>
2014-01-29 21:06:04 +00:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: write_buf is now callable outside send.c Developing service cmds needs it. Signed-off-by: Anand Jain <anand.jain@oracle.com>
2012-09-14 00:04:21 -06:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: hold the commit_root_sem when getting the commit root during send We currently rely too heavily on roots being read-only to save us from just accessing root->commit_root. We can easily balance blocks out from underneath a read only root, so to save us from getting screwed make sure we only access root->commit_root under the commit root sem. Thanks, Signed-off-by: Josef Bacik <jbacik@fb.com> Signed-off-by: Chris Mason <clm@fb.com>
2014-03-28 17:16:01 -04:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: hold the commit_root_sem when getting the commit root during send We currently rely too heavily on roots being read-only to save us from just accessing root->commit_root. We can easily balance blocks out from underneath a read only root, so to save us from getting screwed make sure we only access root->commit_root under the commit root sem. Thanks, Signed-off-by: Josef Bacik <jbacik@fb.com> Signed-off-by: Chris Mason <clm@fb.com>
2014-03-28 17:16:01 -04:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: add rdev to get_inode_info in send/receive We need rdev in the next commit. Signed-off-by: Alexander Block <ablock84@googlemail.com>
2012-07-26 23:39:10 +02:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: hold the commit_root_sem when getting the commit root during send We currently rely too heavily on roots being read-only to save us from just accessing root->commit_root. We can easily balance blocks out from underneath a read only root, so to save us from getting screwed make sure we only access root->commit_root under the commit root sem. Thanks, Signed-off-by: Josef Bacik <jbacik@fb.com> Signed-off-by: Chris Mason <clm@fb.com>
2014-03-28 17:16:01 -04:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: extended inode refs support for send mechanism This adds support for the new extended inode refs to btrfs send. Signed-off-by: Jan Schmidt <list.btrfs@jan-o-sch.net>
2012-10-15 08:30:45 +00:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: extended inode refs support for send mechanism This adds support for the new extended inode refs to btrfs send. Signed-off-by: Jan Schmidt <list.btrfs@jan-o-sch.net>
2012-10-15 08:30:45 +00:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: cleanup unused arguments in send.c sctx is removed from the argument of the function that doesn't use sctx. Signed-off-by: Tsutomu Itoh <t-itoh@jp.fujitsu.com> Signed-off-by: Josef Bacik <jbacik@fusionio.com>
2013-05-08 07:51:52 +00:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: extended inode refs support for send mechanism This adds support for the new extended inode refs to btrfs send. Signed-off-by: Jan Schmidt <list.btrfs@jan-o-sch.net>
2012-10-15 08:30:45 +00:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: extended inode refs support for send mechanism This adds support for the new extended inode refs to btrfs send. Signed-off-by: Jan Schmidt <list.btrfs@jan-o-sch.net>
2012-10-15 08:30:45 +00:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: extended inode refs support for send mechanism This adds support for the new extended inode refs to btrfs send. Signed-off-by: Jan Schmidt <list.btrfs@jan-o-sch.net>
2012-10-15 08:30:45 +00:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: extended inode refs support for send mechanism This adds support for the new extended inode refs to btrfs send. Signed-off-by: Jan Schmidt <list.btrfs@jan-o-sch.net>
2012-10-15 08:30:45 +00:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: extended inode refs support for send mechanism This adds support for the new extended inode refs to btrfs send. Signed-off-by: Jan Schmidt <list.btrfs@jan-o-sch.net>
2012-10-15 08:30:45 +00:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: extended inode refs support for send mechanism This adds support for the new extended inode refs to btrfs send. Signed-off-by: Jan Schmidt <list.btrfs@jan-o-sch.net>
2012-10-15 08:30:45 +00:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: cleanup unused arguments in send.c sctx is removed from the argument of the function that doesn't use sctx. Signed-off-by: Tsutomu Itoh <t-itoh@jp.fujitsu.com> Signed-off-by: Josef Bacik <jbacik@fusionio.com>
2013-05-08 07:51:52 +00:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: cleanup unused arguments in send.c sctx is removed from the argument of the function that doesn't use sctx. Signed-off-by: Tsutomu Itoh <t-itoh@jp.fujitsu.com> Signed-off-by: Josef Bacik <jbacik@fusionio.com>
2013-05-08 07:51:52 +00:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: extended inode refs support for send mechanism This adds support for the new extended inode refs to btrfs send. Signed-off-by: Jan Schmidt <list.btrfs@jan-o-sch.net>
2012-10-15 08:30:45 +00:00
btrfs: drop unused parameter from btrfs_item_nr Remove unused eb parameter from btrfs_item_nr Signed-off-by: Ross Kirk <ross.kirk@gmail.com> Reviewed-by: David Sterba <dsterba@suse.cz> Signed-off-by: Josef Bacik <jbacik@fusionio.com> Signed-off-by: Chris Mason <chris.mason@fusionio.com>
2013-09-16 15:58:09 +01:00
Btrfs: extended inode refs support for send mechanism This adds support for the new extended inode refs to btrfs send. Signed-off-by: Jan Schmidt <list.btrfs@jan-o-sch.net>
2012-10-15 08:30:45 +00:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: extended inode refs support for send mechanism This adds support for the new extended inode refs to btrfs send. Signed-off-by: Jan Schmidt <list.btrfs@jan-o-sch.net>
2012-10-15 08:30:45 +00:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: extended inode refs support for send mechanism This adds support for the new extended inode refs to btrfs send. Signed-off-by: Jan Schmidt <list.btrfs@jan-o-sch.net>
2012-10-15 08:30:45 +00:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: extended inode refs support for send mechanism This adds support for the new extended inode refs to btrfs send. Signed-off-by: Jan Schmidt <list.btrfs@jan-o-sch.net>
2012-10-15 08:30:45 +00:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: extended inode refs support for send mechanism This adds support for the new extended inode refs to btrfs send. Signed-off-by: Jan Schmidt <list.btrfs@jan-o-sch.net>
2012-10-15 08:30:45 +00:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: extended inode refs support for send mechanism This adds support for the new extended inode refs to btrfs send. Signed-off-by: Jan Schmidt <list.btrfs@jan-o-sch.net>
2012-10-15 08:30:45 +00:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: cleanup unused arguments in send.c sctx is removed from the argument of the function that doesn't use sctx. Signed-off-by: Tsutomu Itoh <t-itoh@jp.fujitsu.com> Signed-off-by: Josef Bacik <jbacik@fusionio.com>
2013-05-08 07:51:52 +00:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: cleanup unused arguments in send.c sctx is removed from the argument of the function that doesn't use sctx. Signed-off-by: Tsutomu Itoh <t-itoh@jp.fujitsu.com> Signed-off-by: Josef Bacik <jbacik@fusionio.com>
2013-05-08 07:51:52 +00:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: send, use the right limits for xattr names and values We were limiting the sum of the xattr name and value lengths to PATH_MAX, which is not correct, specially on filesystems created with btrfs-progs v3.12 or higher, where the default leaf size is max(16384, PAGE_SIZE), or systems with page sizes larger than 4096 bytes. Xattrs have their own specific maximum name and value lengths, which depend on the leaf size, therefore use these limits to be able to send xattrs with sizes larger than PATH_MAX. A test case for xfstests follows. Signed-off-by: Filipe David Borba Manana <fdmanana@gmail.com> Signed-off-by: Chris Mason <clm@fb.com>
2014-05-23 20:15:16 +01:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: send, lower mem requirements for processing xattrs Maximum xattr size can be up to nearly the leaf size. For an fs with a leaf size larger than the page size, using kmalloc requires allocating multiple pages that are contiguous, which might not be possible if there's heavy memory fragmentation. Therefore fallback to vmalloc if we fail to allocate with kmalloc. Also start with a smaller buffer size, since xattr values typically are smaller than a page. Reported-by: Chris Murphy <lists@colorremedies.com> Signed-off-by: Filipe Manana <fdmanana@suse.com> Signed-off-by: Chris Mason <clm@fb.com>
2014-08-20 10:45:45 +01:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
btrfs: drop unused parameter from btrfs_item_nr Remove unused eb parameter from btrfs_item_nr Signed-off-by: Ross Kirk <ross.kirk@gmail.com> Reviewed-by: David Sterba <dsterba@suse.cz> Signed-off-by: Josef Bacik <jbacik@fusionio.com> Signed-off-by: Chris Mason <chris.mason@fusionio.com>
2013-09-16 15:58:09 +01:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: send, use the right limits for xattr names and values We were limiting the sum of the xattr name and value lengths to PATH_MAX, which is not correct, specially on filesystems created with btrfs-progs v3.12 or higher, where the default leaf size is max(16384, PAGE_SIZE), or systems with page sizes larger than 4096 bytes. Xattrs have their own specific maximum name and value lengths, which depend on the leaf size, therefore use these limits to be able to send xattrs with sizes larger than PATH_MAX. A test case for xfstests follows. Signed-off-by: Filipe David Borba Manana <fdmanana@gmail.com> Signed-off-by: Chris Mason <clm@fb.com>
2014-05-23 20:15:16 +01:00
Btrfs: send, lower mem requirements for processing xattrs Maximum xattr size can be up to nearly the leaf size. For an fs with a leaf size larger than the page size, using kmalloc requires allocating multiple pages that are contiguous, which might not be possible if there's heavy memory fragmentation. Therefore fallback to vmalloc if we fail to allocate with kmalloc. Also start with a smaller buffer size, since xattr values typically are smaller than a page. Reported-by: Chris Murphy <lists@colorremedies.com> Signed-off-by: Filipe Manana <fdmanana@suse.com> Signed-off-by: Chris Mason <clm@fb.com>
2014-08-20 10:45:45 +01:00
Btrfs: send, use the right limits for xattr names and values We were limiting the sum of the xattr name and value lengths to PATH_MAX, which is not correct, specially on filesystems created with btrfs-progs v3.12 or higher, where the default leaf size is max(16384, PAGE_SIZE), or systems with page sizes larger than 4096 bytes. Xattrs have their own specific maximum name and value lengths, which depend on the leaf size, therefore use these limits to be able to send xattrs with sizes larger than PATH_MAX. A test case for xfstests follows. Signed-off-by: Filipe David Borba Manana <fdmanana@gmail.com> Signed-off-by: Chris Mason <clm@fb.com>
2014-05-23 20:15:16 +01:00
Btrfs: send, lower mem requirements for processing xattrs Maximum xattr size can be up to nearly the leaf size. For an fs with a leaf size larger than the page size, using kmalloc requires allocating multiple pages that are contiguous, which might not be possible if there's heavy memory fragmentation. Therefore fallback to vmalloc if we fail to allocate with kmalloc. Also start with a smaller buffer size, since xattr values typically are smaller than a page. Reported-by: Chris Murphy <lists@colorremedies.com> Signed-off-by: Filipe Manana <fdmanana@suse.com> Signed-off-by: Chris Mason <clm@fb.com>
2014-08-20 10:45:45 +01:00
Btrfs: send, use the right limits for xattr names and values We were limiting the sum of the xattr name and value lengths to PATH_MAX, which is not correct, specially on filesystems created with btrfs-progs v3.12 or higher, where the default leaf size is max(16384, PAGE_SIZE), or systems with page sizes larger than 4096 bytes. Xattrs have their own specific maximum name and value lengths, which depend on the leaf size, therefore use these limits to be able to send xattrs with sizes larger than PATH_MAX. A test case for xfstests follows. Signed-off-by: Filipe David Borba Manana <fdmanana@gmail.com> Signed-off-by: Chris Mason <clm@fb.com>
2014-05-23 20:15:16 +01:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: send, lower mem requirements for processing xattrs Maximum xattr size can be up to nearly the leaf size. For an fs with a leaf size larger than the page size, using kmalloc requires allocating multiple pages that are contiguous, which might not be possible if there's heavy memory fragmentation. Therefore fallback to vmalloc if we fail to allocate with kmalloc. Also start with a smaller buffer size, since xattr values typically are smaller than a page. Reported-by: Chris Murphy <lists@colorremedies.com> Signed-off-by: Filipe Manana <fdmanana@suse.com> Signed-off-by: Chris Mason <clm@fb.com>
2014-08-20 10:45:45 +01:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: send, lower mem requirements for processing xattrs Maximum xattr size can be up to nearly the leaf size. For an fs with a leaf size larger than the page size, using kmalloc requires allocating multiple pages that are contiguous, which might not be possible if there's heavy memory fragmentation. Therefore fallback to vmalloc if we fail to allocate with kmalloc. Also start with a smaller buffer size, since xattr values typically are smaller than a page. Reported-by: Chris Murphy <lists@colorremedies.com> Signed-off-by: Filipe Manana <fdmanana@suse.com> Signed-off-by: Chris Mason <clm@fb.com>
2014-08-20 10:45:45 +01:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: cleanup unused arguments in send.c sctx is removed from the argument of the function that doesn't use sctx. Signed-off-by: Tsutomu Itoh <t-itoh@jp.fujitsu.com> Signed-off-by: Josef Bacik <jbacik@fusionio.com>
2013-05-08 07:51:52 +00:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: extended inode refs support for send mechanism This adds support for the new extended inode refs to btrfs send. Signed-off-by: Jan Schmidt <list.btrfs@jan-o-sch.net>
2012-10-15 08:30:45 +00:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: cleanup unused arguments in send.c sctx is removed from the argument of the function that doesn't use sctx. Signed-off-by: Tsutomu Itoh <t-itoh@jp.fujitsu.com> Signed-off-by: Josef Bacik <jbacik@fusionio.com>
2013-05-08 07:51:52 +00:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: hold the commit_root_sem when getting the commit root during send We currently rely too heavily on roots being read-only to save us from just accessing root->commit_root. We can easily balance blocks out from underneath a read only root, so to save us from getting screwed make sure we only access root->commit_root under the commit root sem. Thanks, Signed-off-by: Josef Bacik <jbacik@fb.com> Signed-off-by: Chris Mason <clm@fb.com>
2014-03-28 17:16:01 -04:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: incremental send, fix clone operations for compressed extents Marc reported a problem where the receiving end of an incremental send was performing clone operations that failed with -EINVAL. This happened because, unlike for uncompressed extents, we were not checking if the source clone offset and length, after summing the data offset, falls within the source file's boundaries. So make sure we do such checks when attempting to issue clone operations for compressed extents. Problem reproducible with the following steps: $ mkfs.btrfs -f /dev/sdb $ mount -o compress /dev/sdb /mnt $ mkfs.btrfs -f /dev/sdc $ mount -o compress /dev/sdc /mnt2 # Create the file with a single extent of 128K. This creates a metadata file # extent item with a data start offset of 0 and a logical length of 128K. $ xfs_io -f -c "pwrite -S 0xaa 64K 128K" -c "fsync" /mnt/foo # Now rewrite the range 64K to 112K of our file. This will make the inode's # metadata continue to point to the 128K extent we created before, but now # with an extent item that points to the extent with a data start offset of # 112K and a logical length of 16K. # That metadata file extent item is associated with the logical file offset # at 176K and covers the logical file range 176K to 192K. $ xfs_io -c "pwrite -S 0xbb 64K 112K" -c "fsync" /mnt/foo # Now rewrite the range 180K to 12K. This will make the inode's metadata # continue to point the the 128K extent we created earlier, with a single # extent item that points to it with a start offset of 112K and a logical # length of 4K. # That metadata file extent item is associated with the logical file offset # at 176K and covers the logical file range 176K to 180K. $ xfs_io -c "pwrite -S 0xcc 180K 12K" -c "fsync" /mnt/foo $ btrfs subvolume snapshot -r /mnt /mnt/snap1 $ touch /mnt/bar # Calls the btrfs clone ioctl. $ ~/xfstests/src/cloner -s $((176 * 1024)) -d $((176 * 1024)) \ -l $((4 * 1024)) /mnt/foo /mnt/bar $ btrfs subvolume snapshot -r /mnt /mnt/snap2 $ btrfs send /mnt/snap1 | btrfs receive /mnt2 At subvol /mnt/snap1 At subvol snap1 $ btrfs send -p /mnt/snap1 /mnt/snap2 | btrfs receive /mnt2 At subvol /mnt/snap2 At snapshot snap2 ERROR: failed to clone extents to bar Invalid argument A test case for fstests follows soon. Reported-by: Marc MERLIN <marc@merlins.org> Tested-by: Marc MERLIN <marc@merlins.org> Signed-off-by: Filipe Manana <fdmanana@suse.com> Tested-by: David Sterba <dsterba@suse.cz> Tested-by: Jan Alexander Steffens (heftig) <jan.steffens@gmail.com> Signed-off-by: Chris Mason <clm@fb.com>
2015-05-03 01:56:00 +01:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: rename backref_ctx::found_in_send_root to found_itself The new name should be easier to understand/read. Commit is a result of Arne's review. Signed-off-by: Alexander Block <ablock84@googlemail.com>
2012-07-28 12:42:05 +02:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: fix gcc warnings for 32bit compiles Signed-off-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Signed-off-by: Chris Mason <chris.mason@fusionio.com>
2012-08-13 02:52:38 -06:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: add/fix comments/documentation for send/receive As the subject already said, add/fix comments. Signed-off-by: Alexander Block <ablock84@googlemail.com>
2012-07-28 14:11:31 +02:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: fix gcc warnings for 32bit compiles Signed-off-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Signed-off-by: Chris Mason <chris.mason@fusionio.com>
2012-08-13 02:52:38 -06:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: rename backref_ctx::found_in_send_root to found_itself The new name should be easier to understand/read. Commit is a result of Arne's review. Signed-off-by: Alexander Block <ablock84@googlemail.com>
2012-07-28 12:42:05 +02:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: add/fix comments/documentation for send/receive As the subject already said, add/fix comments. Signed-off-by: Alexander Block <ablock84@googlemail.com>
2012-07-28 14:11:31 +02:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: hold the commit_root_sem when getting the commit root during send We currently rely too heavily on roots being read-only to save us from just accessing root->commit_root. We can easily balance blocks out from underneath a read only root, so to save us from getting screwed make sure we only access root->commit_root under the commit root sem. Thanks, Signed-off-by: Josef Bacik <jbacik@fb.com> Signed-off-by: Chris Mason <clm@fb.com>
2014-03-28 17:16:01 -04:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: incremental send, fix clone operations for compressed extents Marc reported a problem where the receiving end of an incremental send was performing clone operations that failed with -EINVAL. This happened because, unlike for uncompressed extents, we were not checking if the source clone offset and length, after summing the data offset, falls within the source file's boundaries. So make sure we do such checks when attempting to issue clone operations for compressed extents. Problem reproducible with the following steps: $ mkfs.btrfs -f /dev/sdb $ mount -o compress /dev/sdb /mnt $ mkfs.btrfs -f /dev/sdc $ mount -o compress /dev/sdc /mnt2 # Create the file with a single extent of 128K. This creates a metadata file # extent item with a data start offset of 0 and a logical length of 128K. $ xfs_io -f -c "pwrite -S 0xaa 64K 128K" -c "fsync" /mnt/foo # Now rewrite the range 64K to 112K of our file. This will make the inode's # metadata continue to point to the 128K extent we created before, but now # with an extent item that points to the extent with a data start offset of # 112K and a logical length of 16K. # That metadata file extent item is associated with the logical file offset # at 176K and covers the logical file range 176K to 192K. $ xfs_io -c "pwrite -S 0xbb 64K 112K" -c "fsync" /mnt/foo # Now rewrite the range 180K to 12K. This will make the inode's metadata # continue to point the the 128K extent we created earlier, with a single # extent item that points to it with a start offset of 112K and a logical # length of 4K. # That metadata file extent item is associated with the logical file offset # at 176K and covers the logical file range 176K to 180K. $ xfs_io -c "pwrite -S 0xcc 180K 12K" -c "fsync" /mnt/foo $ btrfs subvolume snapshot -r /mnt /mnt/snap1 $ touch /mnt/bar # Calls the btrfs clone ioctl. $ ~/xfstests/src/cloner -s $((176 * 1024)) -d $((176 * 1024)) \ -l $((4 * 1024)) /mnt/foo /mnt/bar $ btrfs subvolume snapshot -r /mnt /mnt/snap2 $ btrfs send /mnt/snap1 | btrfs receive /mnt2 At subvol /mnt/snap1 At subvol snap1 $ btrfs send -p /mnt/snap1 /mnt/snap2 | btrfs receive /mnt2 At subvol /mnt/snap2 At snapshot snap2 ERROR: failed to clone extents to bar Invalid argument A test case for fstests follows soon. Reported-by: Marc MERLIN <marc@merlins.org> Tested-by: Marc MERLIN <marc@merlins.org> Signed-off-by: Filipe Manana <fdmanana@suse.com> Tested-by: David Sterba <dsterba@suse.cz> Tested-by: Jan Alexander Steffens (heftig) <jan.steffens@gmail.com> Signed-off-by: Chris Mason <clm@fb.com>
2015-05-03 01:56:00 +01:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: code cleanups for send/receive Doing some code cleanups as suggested by Arne. Changes do not change any logic. Signed-off-by: Alexander Block <ablock84@googlemail.com>
2012-07-28 16:33:49 +02:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: code cleanups for send/receive Doing some code cleanups as suggested by Arne. Changes do not change any logic. Signed-off-by: Alexander Block <ablock84@googlemail.com>
2012-07-28 16:33:49 +02:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: add/fix comments/documentation for send/receive As the subject already said, add/fix comments. Signed-off-by: Alexander Block <ablock84@googlemail.com>
2012-07-28 14:11:31 +02:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: fix btrfs send for inline items and compression The btrfs send code was assuming the offset of the file item into the extent translated to bytes on disk. If we're compressed, this isn't true, and so it was off into extents owned by other files. It was also improperly handling inline extents. This solves a crash where we may have gone past the end of the file extent item by not testing early enough for an inline extent. It also solves problems where we have a whole between the end of the inline item and the start of the full extent. Signed-off-by: Chris Mason <chris.mason@fusionio.com>
2012-08-07 16:25:13 -04:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: fix a bug in parsing return value in logical resolve In logical resolve, we parse extent_from_logical()'s 'ret' as a kind of flag. It is possible to lose our errors because (-EXXXX & BTRFS_EXTENT_FLAG_TREE_BLOCK) is true. I'm not sure if it is on purpose, it just looks too hacky if it is. I'd rather use a real flag and a 'ret' to catch errors. Acked-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Signed-off-by: Liu Bo <liub.liubo@gmail.com>
2012-09-07 20:01:28 -06:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: use kmalloc instead of stack for backref_ctx Make sure to never get in trouble due to the backref_ctx which was on the stack before. Commit is a result of Arne's review. Signed-off-by: Alexander Block <ablock84@googlemail.com>
2012-07-28 12:44:34 +02:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: fix btrfs send for inline items and compression The btrfs send code was assuming the offset of the file item into the extent translated to bytes on disk. If we're compressed, this isn't true, and so it was off into extents owned by other files. It was also improperly handling inline extents. This solves a crash where we may have gone past the end of the file extent item by not testing early enough for an inline extent. It also solves problems where we have a whole between the end of the inline item and the start of the full extent. Signed-off-by: Chris Mason <chris.mason@fusionio.com>
2012-08-07 16:25:13 -04:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: hold the commit_root_sem when getting the commit root during send We currently rely too heavily on roots being read-only to save us from just accessing root->commit_root. We can easily balance blocks out from underneath a read only root, so to save us from getting screwed make sure we only access root->commit_root under the commit root sem. Thanks, Signed-off-by: Josef Bacik <jbacik@fb.com> Signed-off-by: Chris Mason <clm@fb.com>
2014-03-28 17:16:01 -04:00
Btrfs: use kmalloc instead of stack for backref_ctx Make sure to never get in trouble due to the backref_ctx which was on the stack before. Commit is a result of Arne's review. Signed-off-by: Alexander Block <ablock84@googlemail.com>
2012-07-28 12:44:34 +02:00
Btrfs: hold the commit_root_sem when getting the commit root during send We currently rely too heavily on roots being read-only to save us from just accessing root->commit_root. We can easily balance blocks out from underneath a read only root, so to save us from getting screwed make sure we only access root->commit_root under the commit root sem. Thanks, Signed-off-by: Josef Bacik <jbacik@fb.com> Signed-off-by: Chris Mason <clm@fb.com>
2014-03-28 17:16:01 -04:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: fix btrfs send for inline items and compression The btrfs send code was assuming the offset of the file item into the extent translated to bytes on disk. If we're compressed, this isn't true, and so it was off into extents owned by other files. It was also improperly handling inline extents. This solves a crash where we may have gone past the end of the file extent item by not testing early enough for an inline extent. It also solves problems where we have a whole between the end of the inline item and the start of the full extent. Signed-off-by: Chris Mason <chris.mason@fusionio.com>
2012-08-07 16:25:13 -04:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: fix btrfs send for inline items and compression The btrfs send code was assuming the offset of the file item into the extent translated to bytes on disk. If we're compressed, this isn't true, and so it was off into extents owned by other files. It was also improperly handling inline extents. This solves a crash where we may have gone past the end of the file extent item by not testing early enough for an inline extent. It also solves problems where we have a whole between the end of the inline item and the start of the full extent. Signed-off-by: Chris Mason <chris.mason@fusionio.com>
2012-08-07 16:25:13 -04:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: fix btrfs send for inline items and compression The btrfs send code was assuming the offset of the file item into the extent translated to bytes on disk. If we're compressed, this isn't true, and so it was off into extents owned by other files. It was also improperly handling inline extents. This solves a crash where we may have gone past the end of the file extent item by not testing early enough for an inline extent. It also solves problems where we have a whole between the end of the inline item and the start of the full extent. Signed-off-by: Chris Mason <chris.mason@fusionio.com>
2012-08-07 16:25:13 -04:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: remove transaction from send Lets try this again. We can deadlock the box if we send on a box and try to write onto the same fs with the app that is trying to listen to the send pipe. This is because the writer could get stuck waiting for a transaction commit which is being blocked by the send. So fix this by making sure looking at the commit roots is always going to be consistent. We do this by keeping track of which roots need to have their commit roots swapped during commit, and then taking the commit_root_sem and swapping them all at once. Then make sure we take a read lock on the commit_root_sem in cases where we search the commit root to make sure we're always looking at a consistent view of the commit roots. Previously we had problems with this because we would swap a fs tree commit root and then swap the extent tree commit root independently which would cause the backref walking code to screw up sometimes. With this patch we no longer deadlock and pass all the weird send/receive corner cases. Thanks, Reportedy-by: Hugo Mills <hugo@carfax.org.uk> Signed-off-by: Josef Bacik <jbacik@fb.com> Signed-off-by: Chris Mason <clm@fb.com>
2014-03-13 15:42:13 -04:00
Btrfs: fix a bug in parsing return value in logical resolve In logical resolve, we parse extent_from_logical()'s 'ret' as a kind of flag. It is possible to lose our errors because (-EXXXX & BTRFS_EXTENT_FLAG_TREE_BLOCK) is true. I'm not sure if it is on purpose, it just looks too hacky if it is. I'd rather use a real flag and a 'ret' to catch errors. Acked-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Signed-off-by: Liu Bo <liub.liubo@gmail.com>
2012-09-07 20:01:28 -06:00
Btrfs: remove transaction from send Lets try this again. We can deadlock the box if we send on a box and try to write onto the same fs with the app that is trying to listen to the send pipe. This is because the writer could get stuck waiting for a transaction commit which is being blocked by the send. So fix this by making sure looking at the commit roots is always going to be consistent. We do this by keeping track of which roots need to have their commit roots swapped during commit, and then taking the commit_root_sem and swapping them all at once. Then make sure we take a read lock on the commit_root_sem in cases where we search the commit root to make sure we're always looking at a consistent view of the commit roots. Previously we had problems with this because we would swap a fs tree commit root and then swap the extent tree commit root independently which would cause the backref walking code to screw up sometimes. With this patch we no longer deadlock and pass all the weird send/receive corner cases. Thanks, Reportedy-by: Hugo Mills <hugo@carfax.org.uk> Signed-off-by: Josef Bacik <jbacik@fb.com> Signed-off-by: Chris Mason <clm@fb.com>
2014-03-13 15:42:13 -04:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: fix a bug in parsing return value in logical resolve In logical resolve, we parse extent_from_logical()'s 'ret' as a kind of flag. It is possible to lose our errors because (-EXXXX & BTRFS_EXTENT_FLAG_TREE_BLOCK) is true. I'm not sure if it is on purpose, it just looks too hacky if it is. I'd rather use a real flag and a 'ret' to catch errors. Acked-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Signed-off-by: Liu Bo <liub.liubo@gmail.com>
2012-09-07 20:01:28 -06:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: use kmalloc instead of stack for backref_ctx Make sure to never get in trouble due to the backref_ctx which was on the stack before. Commit is a result of Arne's review. Signed-off-by: Alexander Block <ablock84@googlemail.com>
2012-07-28 12:44:34 +02:00
Btrfs: incremental send, fix clone operations for compressed extents Marc reported a problem where the receiving end of an incremental send was performing clone operations that failed with -EINVAL. This happened because, unlike for uncompressed extents, we were not checking if the source clone offset and length, after summing the data offset, falls within the source file's boundaries. So make sure we do such checks when attempting to issue clone operations for compressed extents. Problem reproducible with the following steps: $ mkfs.btrfs -f /dev/sdb $ mount -o compress /dev/sdb /mnt $ mkfs.btrfs -f /dev/sdc $ mount -o compress /dev/sdc /mnt2 # Create the file with a single extent of 128K. This creates a metadata file # extent item with a data start offset of 0 and a logical length of 128K. $ xfs_io -f -c "pwrite -S 0xaa 64K 128K" -c "fsync" /mnt/foo # Now rewrite the range 64K to 112K of our file. This will make the inode's # metadata continue to point to the 128K extent we created before, but now # with an extent item that points to the extent with a data start offset of # 112K and a logical length of 16K. # That metadata file extent item is associated with the logical file offset # at 176K and covers the logical file range 176K to 192K. $ xfs_io -c "pwrite -S 0xbb 64K 112K" -c "fsync" /mnt/foo # Now rewrite the range 180K to 12K. This will make the inode's metadata # continue to point the the 128K extent we created earlier, with a single # extent item that points to it with a start offset of 112K and a logical # length of 4K. # That metadata file extent item is associated with the logical file offset # at 176K and covers the logical file range 176K to 180K. $ xfs_io -c "pwrite -S 0xcc 180K 12K" -c "fsync" /mnt/foo $ btrfs subvolume snapshot -r /mnt /mnt/snap1 $ touch /mnt/bar # Calls the btrfs clone ioctl. $ ~/xfstests/src/cloner -s $((176 * 1024)) -d $((176 * 1024)) \ -l $((4 * 1024)) /mnt/foo /mnt/bar $ btrfs subvolume snapshot -r /mnt /mnt/snap2 $ btrfs send /mnt/snap1 | btrfs receive /mnt2 At subvol /mnt/snap1 At subvol snap1 $ btrfs send -p /mnt/snap1 /mnt/snap2 | btrfs receive /mnt2 At subvol /mnt/snap2 At snapshot snap2 ERROR: failed to clone extents to bar Invalid argument A test case for fstests follows soon. Reported-by: Marc MERLIN <marc@merlins.org> Tested-by: Marc MERLIN <marc@merlins.org> Signed-off-by: Filipe Manana <fdmanana@suse.com> Tested-by: David Sterba <dsterba@suse.cz> Tested-by: Jan Alexander Steffens (heftig) <jan.steffens@gmail.com> Signed-off-by: Chris Mason <clm@fb.com>
2015-05-03 01:56:00 +01:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: use kmalloc instead of stack for backref_ctx Make sure to never get in trouble due to the backref_ctx which was on the stack before. Commit is a result of Arne's review. Signed-off-by: Alexander Block <ablock84@googlemail.com>
2012-07-28 12:44:34 +02:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: fix btrfs send for inline items and compression The btrfs send code was assuming the offset of the file item into the extent translated to bytes on disk. If we're compressed, this isn't true, and so it was off into extents owned by other files. It was also improperly handling inline extents. This solves a crash where we may have gone past the end of the file extent item by not testing early enough for an inline extent. It also solves problems where we have a whole between the end of the inline item and the start of the full extent. Signed-off-by: Chris Mason <chris.mason@fusionio.com>
2012-08-07 16:25:13 -04:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: use kmalloc instead of stack for backref_ctx Make sure to never get in trouble due to the backref_ctx which was on the stack before. Commit is a result of Arne's review. Signed-off-by: Alexander Block <ablock84@googlemail.com>
2012-07-28 12:44:34 +02:00
Btrfs: fix btrfs send for inline items and compression The btrfs send code was assuming the offset of the file item into the extent translated to bytes on disk. If we're compressed, this isn't true, and so it was off into extents owned by other files. It was also improperly handling inline extents. This solves a crash where we may have gone past the end of the file extent item by not testing early enough for an inline extent. It also solves problems where we have a whole between the end of the inline item and the start of the full extent. Signed-off-by: Chris Mason <chris.mason@fusionio.com>
2012-08-07 16:25:13 -04:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: use kmalloc instead of stack for backref_ctx Make sure to never get in trouble due to the backref_ctx which was on the stack before. Commit is a result of Arne's review. Signed-off-by: Alexander Block <ablock84@googlemail.com>
2012-07-28 12:44:34 +02:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: convert printk to btrfs_ and fix BTRFS prefix Convert all applicable cases of printk and pr_* to the btrfs_* macros. Fix all uses of the BTRFS prefix. Signed-off-by: Frank Holton <fholton@gmail.com> Signed-off-by: Josef Bacik <jbacik@fb.com> Signed-off-by: Chris Mason <clm@fb.com>
2013-12-20 11:37:06 -05:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
btrfs: remove stale newlines from log messages I've noticed an extra line after "use no compression", but search revealed much more in messages of more critical levels and rare errors. Signed-off-by: David Sterba <dsterba@suse.cz> Signed-off-by: Chris Mason <clm@fb.com>
2014-05-15 16:48:20 +02:00
Btrfs: fix btrfs send for inline items and compression The btrfs send code was assuming the offset of the file item into the extent translated to bytes on disk. If we're compressed, this isn't true, and so it was off into extents owned by other files. It was also improperly handling inline extents. This solves a crash where we may have gone past the end of the file extent item by not testing early enough for an inline extent. It also solves problems where we have a whole between the end of the inline item and the start of the full extent. Signed-off-by: Chris Mason <chris.mason@fusionio.com>
2012-08-07 16:25:13 -04:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: use kmalloc instead of stack for backref_ctx Make sure to never get in trouble due to the backref_ctx which was on the stack before. Commit is a result of Arne's review. Signed-off-by: Alexander Block <ablock84@googlemail.com>
2012-07-28 12:44:34 +02:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: use kmalloc instead of stack for backref_ctx Make sure to never get in trouble due to the backref_ctx which was on the stack before. Commit is a result of Arne's review. Signed-off-by: Alexander Block <ablock84@googlemail.com>
2012-07-28 12:44:34 +02:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: cleanup unused arguments in send.c sctx is removed from the argument of the function that doesn't use sctx. Signed-off-by: Tsutomu Itoh <t-itoh@jp.fujitsu.com> Signed-off-by: Josef Bacik <jbacik@fusionio.com>
2013-05-08 07:51:52 +00:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: send, don't BUG_ON() when an empty symlink is found commit a879719b8c90e15c9e7fa7266d5e3c0ca962f9df upstream. When a symlink is successfully created it always has an inline extent containing the source path. However if an error happens when creating the symlink, we can leave in the subvolume's tree a symlink inode without any such inline extent item - this happens if after btrfs_symlink() calls btrfs_end_transaction() and before it calls the inode eviction handler (through the final iput() call), the transaction gets committed and a crash happens before the eviction handler gets called, or if a snapshot of the subvolume is made before the eviction handler gets called. Sadly we can't just avoid this by making btrfs_symlink() call btrfs_end_transaction() after it calls the eviction handler, because the later can commit the current transaction before it removes any items from the subvolume tree (if it encounters ENOSPC errors while reserving space for removing all the items). So make send fail more gracefully, with an -EIO error, and print a message to dmesg/syslog informing that there's an empty symlink inode, so that the user can delete the empty symlink or do something else about it. Reported-by: Stephen R. van den Berg <srb@cuci.nl> Signed-off-by: Filipe Manana <fdmanana@suse.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-12-31 18:07:59 +00:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: don't use ram_bytes for uncompressed inline items If we truncate an uncompressed inline item, ram_bytes isn't updated to reflect the new size. The fixe uses the size directly from the item header when reading uncompressed inlines, and also fixes truncate to update the size as it goes. Reported-by: Jens Axboe <axboe@fb.com> Signed-off-by: Chris Mason <clm@fb.com> CC: stable@vger.kernel.org
2014-01-03 21:07:00 -08:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: fix snprintf usage by send's gen_unique_name The buffer size argument passed to snprintf must account for the trailing null byte added by snprintf, and it returns a value >= then sizeof(buffer) when the string can't fit in the buffer. Since our buffer has a size of 64 characters, and the maximum orphan name we can generate is 63 characters wide, we must pass 64 as the buffer size to snprintf, and not 63. Signed-off-by: Filipe David Borba Manana <fdmanana@gmail.com> Reviewed-by: David Sterba <dsterba@suse.cz> Signed-off-by: Josef Bacik <jbacik@fb.com> Signed-off-by: Chris Mason <clm@fb.com>
2014-01-21 23:36:38 +00:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
btrfs: send: replace check with an assert in gen_unique_name The buffer passed to snprintf can hold the fully expanded format string, 64 = 3x largest ULL + 3x char + trailing null. I don't think that removing the check entirely is a good idea, hence the ASSERT. Signed-off-by: David Sterba <dsterba@suse.cz> Signed-off-by: Josef Bacik <jbacik@fb.com>
2014-02-03 18:24:09 +01:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: add rdev to get_inode_info in send/receive We need rdev in the next commit. Signed-off-by: Alexander Block <ablock84@googlemail.com>
2012-07-26 23:39:10 +02:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: add rdev to get_inode_info in send/receive We need rdev in the next commit. Signed-off-by: Alexander Block <ablock84@googlemail.com>
2012-07-26 23:39:10 +02:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: code cleanups for send/receive Doing some code cleanups as suggested by Arne. Changes do not change any logic. Signed-off-by: Alexander Block <ablock84@googlemail.com>
2012-07-28 16:33:49 +02:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: code cleanups for send/receive Doing some code cleanups as suggested by Arne. Changes do not change any logic. Signed-off-by: Alexander Block <ablock84@googlemail.com>
2012-07-28 16:33:49 +02:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: send, don't error in the presence of subvols/snapshots If we are doing an incremental send and the base snapshot has a directory with name X that doesn't exist anymore in the second snapshot and a new subvolume/snapshot exists in the second snapshot that has the same name as the directory (name X), the incremental send would fail with -ENOENT error. This is because it attempts to lookup for an inode with a number matching the objectid of a root, which doesn't exist. Steps to reproduce: mkfs.btrfs -f /dev/sdd mount /dev/sdd /mnt mkdir /mnt/testdir btrfs subvolume snapshot -r /mnt /mnt/mysnap1 rmdir /mnt/testdir btrfs subvolume create /mnt/testdir btrfs subvolume snapshot -r /mnt /mnt/mysnap2 btrfs send -p /mnt/mysnap1 /mnt/mysnap2 -f /tmp/send.data A test case for xfstests follows. Reported-by: Robert White <rwhite@pobox.com> Signed-off-by: Filipe David Borba Manana <fdmanana@gmail.com> Signed-off-by: Chris Mason <clm@fb.com>
2014-05-25 04:49:24 +01:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: add/fix comments/documentation for send/receive As the subject already said, add/fix comments. Signed-off-by: Alexander Block <ablock84@googlemail.com>
2012-07-28 14:11:31 +02:00
Btrfs: cleanup unused arguments in send.c sctx is removed from the argument of the function that doesn't use sctx. Signed-off-by: Tsutomu Itoh <t-itoh@jp.fujitsu.com> Signed-off-by: Josef Bacik <jbacik@fusionio.com>
2013-05-08 07:51:52 +00:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: extended inode refs support for send mechanism This adds support for the new extended inode refs to btrfs send. Signed-off-by: Jan Schmidt <list.btrfs@jan-o-sch.net>
2012-10-15 08:30:45 +00:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: extended inode refs support for send mechanism This adds support for the new extended inode refs to btrfs send. Signed-off-by: Jan Schmidt <list.btrfs@jan-o-sch.net>
2012-10-15 08:30:45 +00:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: send, fix incorrect ref access when using extrefs When running send, if an inode only has extended reference items associated to it and no regular references, send.c:get_first_ref() was incorrectly assuming the reference it found was of type BTRFS_INODE_REF_KEY due to use of the wrong key variable. This caused weird behaviour when using the found item has a regular reference, such as weird path string, and occasionally (when lucky) a crash: [ 190.600652] general protection fault: 0000 [#1] SMP DEBUG_PAGEALLOC [ 190.600994] Modules linked in: btrfs xor raid6_pq binfmt_misc nfsd auth_rpcgss oid_registry nfs_acl nfs lockd fscache sunrpc psmouse serio_raw evbug pcspkr i2c_piix4 e1000 floppy [ 190.602565] CPU: 2 PID: 14520 Comm: btrfs Not tainted 3.13.0-fdm-btrfs-next-26+ #1 [ 190.602728] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 190.602868] task: ffff8800d447c920 ti: ffff8801fa79e000 task.ti: ffff8801fa79e000 [ 190.603030] RIP: 0010:[<ffffffff813266b4>] [<ffffffff813266b4>] memcpy+0x54/0x110 [ 190.603262] RSP: 0018:ffff8801fa79f880 EFLAGS: 00010202 [ 190.603395] RAX: ffff8800d4326e3f RBX: 000000000000036a RCX: ffff880000000000 [ 190.603553] RDX: 000000000000032a RSI: ffe708844042936a RDI: ffff8800d43271a9 [ 190.603710] RBP: ffff8801fa79f8c8 R08: 00000000003a4ef0 R09: 0000000000000000 [ 190.603867] R10: 793a4ef09f000000 R11: 9f0000000053726f R12: ffff8800d43271a9 [ 190.604020] R13: 0000160000000000 R14: ffff8802110134f0 R15: 000000000000036a [ 190.604020] FS: 00007fb423d09b80(0000) GS:ffff880216200000(0000) knlGS:0000000000000000 [ 190.604020] CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b [ 190.604020] CR2: 00007fb4229d4b78 CR3: 00000001f5d76000 CR4: 00000000000006e0 [ 190.604020] Stack: [ 190.604020] ffffffffa01f4d49 ffff8801fa79f8f0 00000000000009f9 ffff8801fa79f8c8 [ 190.604020] 00000000000009f9 ffff880211013260 000000000000f971 ffff88021147dba8 [ 190.604020] 00000000000009f9 ffff8801fa79f918 ffffffffa02367f5 ffff8801fa79f928 [ 190.604020] Call Trace: [ 190.604020] [<ffffffffa01f4d49>] ? read_extent_buffer+0xb9/0x120 [btrfs] [ 190.604020] [<ffffffffa02367f5>] fs_path_add_from_extent_buffer+0x45/0x60 [btrfs] [ 190.604020] [<ffffffffa0238806>] get_first_ref+0x1f6/0x210 [btrfs] [ 190.604020] [<ffffffffa0238994>] __get_cur_name_and_parent+0x174/0x3a0 [btrfs] [ 190.604020] [<ffffffff8118df3d>] ? kmem_cache_alloc_trace+0x11d/0x1e0 [ 190.604020] [<ffffffffa0236674>] ? fs_path_alloc+0x24/0x60 [btrfs] [ 190.604020] [<ffffffffa0238c91>] get_cur_path+0xd1/0x240 [btrfs] (...) Steps to reproduce (either crash or some weirdness like an odd path string): mkfs.btrfs -f -O extref /dev/sdd mount /dev/sdd /mnt mkdir /mnt/testdir touch /mnt/testdir/foobar for i in `seq 1 2550`; do ln /mnt/testdir/foobar /mnt/testdir/foobar_link_`printf "%04d" $i` done ln /mnt/testdir/foobar /mnt/testdir/final_foobar_name rm -f /mnt/testdir/foobar for i in `seq 1 2550`; do rm -f /mnt/testdir/foobar_link_`printf "%04d" $i` done btrfs subvolume snapshot -r /mnt /mnt/mysnap btrfs send /mnt/mysnap -f /tmp/mysnap.send Signed-off-by: Filipe David Borba Manana <fdmanana@gmail.com> Signed-off-by: Chris Mason <clm@fb.com> Reviewed-by: Liu Bo <bo.li.liu@oracle.com>
2014-05-13 22:01:02 +01:00
Btrfs: extended inode refs support for send mechanism This adds support for the new extended inode refs to btrfs send. Signed-off-by: Jan Schmidt <list.btrfs@jan-o-sch.net>
2012-10-15 08:30:45 +00:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: send, avoid unnecessary inode item lookup in the btree Regardless of whether the caller is interested or not in knowing the inode's generation (dir_gen != NULL), get_first_ref always does a btree lookup to get the inode item. Avoid this useless lookup if dir_gen parameter is NULL (which is in some cases). Signed-off-by: Filipe David Borba Manana <fdmanana@gmail.com> Signed-off-by: Chris Mason <clm@fb.com>
2014-03-21 12:46:54 +00:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: extended inode refs support for send mechanism This adds support for the new extended inode refs to btrfs send. Signed-off-by: Jan Schmidt <list.btrfs@jan-o-sch.net>
2012-10-15 08:30:45 +00:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: cleanup unused arguments in send.c sctx is removed from the argument of the function that doesn't use sctx. Signed-off-by: Tsutomu Itoh <t-itoh@jp.fujitsu.com> Signed-off-by: Josef Bacik <jbacik@fusionio.com>
2013-05-08 07:51:52 +00:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: cleanup unused arguments in send.c sctx is removed from the argument of the function that doesn't use sctx. Signed-off-by: Tsutomu Itoh <t-itoh@jp.fujitsu.com> Signed-off-by: Josef Bacik <jbacik@fusionio.com>
2013-05-08 07:51:52 +00:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: send, avoid unnecessary inode item lookup in the btree Regardless of whether the caller is interested or not in knowing the inode's generation (dir_gen != NULL), get_first_ref always does a btree lookup to get the inode item. Avoid this useless lookup if dir_gen parameter is NULL (which is in some cases). Signed-off-by: Filipe David Borba Manana <fdmanana@gmail.com> Signed-off-by: Chris Mason <clm@fb.com>
2014-03-21 12:46:54 +00:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: add missing check for dir != tmp_dir to is_first_ref We missed that check which resultet in all refs with the same name being reported as first_ref. Reported-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com> Signed-off-by: Alexander Block <ablock84@googlemail.com>
2012-07-28 11:07:18 +02:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: code cleanups for send/receive Doing some code cleanups as suggested by Arne. Changes do not change any logic. Signed-off-by: Alexander Block <ablock84@googlemail.com>
2012-07-28 16:33:49 +02:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: cleanup unused arguments in send.c sctx is removed from the argument of the function that doesn't use sctx. Signed-off-by: Tsutomu Itoh <t-itoh@jp.fujitsu.com> Signed-off-by: Josef Bacik <jbacik@fusionio.com>
2013-05-08 07:51:52 +00:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: add/fix comments/documentation for send/receive As the subject already said, add/fix comments. Signed-off-by: Alexander Block <ablock84@googlemail.com>
2012-07-28 14:11:31 +02:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: check our parent dir when doing a compare send When doing a send with a parent subvol we will check to see if the file we are acting on is being overwritten and move it if we think it may be needed further down the line during the send. We check this by checking its directory and making sure it existed in the parent and making sure the file existed in the parent. The problem with this check is that if we create a directory and a file in that directory, and then snapshot, and then remove and re-create that same directory and file with different inode numbers and then try to snapshot and send with the original parent we will try and save the original file inside of that directory. This is a problem because during the receive we move the directory out of the way because it is a completely new inode, which makes us unable to find the old file inside of the directory when we try to move that out of the way for the overwrite. We fix this by checking the parent directory of the inode we think we are overwriting. If the parent directory generation in the send root != the parent directory generation in the parent root then we know it is a completely new directory and we need not bother with moving the file out of the way because it would have been completely destroyed. This fixes bz 60673. Thanks, Signed-off-by: Josef Bacik <jbacik@fusionio.com> Signed-off-by: Chris Mason <chris.mason@fusionio.com>
2013-08-06 16:47:48 -04:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: check our parent dir when doing a compare send When doing a send with a parent subvol we will check to see if the file we are acting on is being overwritten and move it if we think it may be needed further down the line during the send. We check this by checking its directory and making sure it existed in the parent and making sure the file existed in the parent. The problem with this check is that if we create a directory and a file in that directory, and then snapshot, and then remove and re-create that same directory and file with different inode numbers and then try to snapshot and send with the original parent we will try and save the original file inside of that directory. This is a problem because during the receive we move the directory out of the way because it is a completely new inode, which makes us unable to find the old file inside of the directory when we try to move that out of the way for the overwrite. We fix this by checking the parent directory of the inode we think we are overwriting. If the parent directory generation in the send root != the parent directory generation in the parent root then we know it is a completely new directory and we need not bother with moving the file out of the way because it would have been completely destroyed. This fixes bz 60673. Thanks, Signed-off-by: Josef Bacik <jbacik@fusionio.com> Signed-off-by: Chris Mason <chris.mason@fusionio.com>
2013-08-06 16:47:48 -04:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: add/fix comments/documentation for send/receive As the subject already said, add/fix comments. Signed-off-by: Alexander Block <ablock84@googlemail.com>
2012-07-28 14:11:31 +02:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: add rdev to get_inode_info in send/receive We need rdev in the next commit. Signed-off-by: Alexander Block <ablock84@googlemail.com>
2012-07-26 23:39:10 +02:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: add/fix comments/documentation for send/receive As the subject already said, add/fix comments. Signed-off-by: Alexander Block <ablock84@googlemail.com>
2012-07-28 14:11:31 +02:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: add rdev to get_inode_info in send/receive We need rdev in the next commit. Signed-off-by: Alexander Block <ablock84@googlemail.com>
2012-07-26 23:39:10 +02:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: incremental send, check if orphanized dir inode needs delayed rename If a directory inode is orphanized, because some inode previously processed has a new name that collides with the old name of the current inode, we need to check if it needs its rename operation delayed too, as its ancestor-descendent relationship with some other inode might have been reversed between the parent and send snapshots and therefore its rename operation needs to happen after that other inode is renamed. For example, for the following reproducer where this is needed (provided by Robbie Ko): $ mkfs.btrfs -f /dev/sdb $ mount /dev/sdb /mnt $ mkfs.btrfs -f /dev/sdc $ mount /dev/sdc /mnt2 $ mkdir -p /mnt/data/n1/n2 $ mkdir /mnt/data/n4 $ mkdir -p /mnt/data/t6/t7 $ mkdir /mnt/data/t5 $ mkdir /mnt/data/t7 $ mkdir /mnt/data/n4/t2 $ mkdir /mnt/data/t4 $ mkdir /mnt/data/t3 $ mv /mnt/data/t7 /mnt/data/n4/t2 $ mv /mnt/data/t4 /mnt/data/n4/t2/t7 $ mv /mnt/data/t5 /mnt/data/n4/t2/t7/t4 $ mv /mnt/data/t6 /mnt/data/n4/t2/t7/t4/t5 $ mv /mnt/data/n1/n2 /mnt/data/n4/t2/t7/t4/t5/t6 $ mv /mnt/data/n1 /mnt/data/n4/t2/t7/t4/t5/t6 $ mv /mnt/data/n4/t2/t7/t4/t5/t6/t7 /mnt/data/n4/t2/t7/t4/t5/t6/n2 $ mv /mnt/data/t3 /mnt/data/n4/t2/t7/t4/t5/t6/n2/t7 $ btrfs subvolume snapshot -r /mnt /mnt/snap1 $ mv /mnt/data/n4/t2/t7/t4/t5/t6/n1 /mnt/data/n4 $ mv /mnt/data/n4/t2 /mnt/data/n4/n1 $ mv /mnt/data/n4/n1/t2/t7/t4/t5/t6/n2 /mnt/data/n4/n1/t2 $ mv /mnt/data/n4/n1/t2/n2/t7/t3 /mnt/data/n4/n1/t2 $ mv /mnt/data/n4/n1/t2/t7/t4/t5/t6 /mnt/data/n4/n1/t2 $ mv /mnt/data/n4/n1/t2/t7/t4 /mnt/data/n4/n1/t2/t6 $ mv /mnt/data/n4/n1/t2/t7 /mnt/data/n4/n1/t2/t3 $ mv /mnt/data/n4/n1/t2/n2/t7 /mnt/data/n4/n1/t2 $ btrfs subvolume snapshot -r /mnt /mnt/snap2 $ btrfs send /mnt/snap1 | btrfs receive /mnt2 $ btrfs send -p /mnt/snap1 /mnt/snap2 | btrfs receive /mnt2 ERROR: send ioctl failed with -12: Cannot allocate memory Where the parent snapshot directory hierarchy is the following: . (ino 256) |-- data/ (ino 257) |-- n4/ (ino 260) |-- t2/ (ino 265) |-- t7/ (ino 264) |-- t4/ (ino 266) |-- t5/ (ino 263) |-- t6/ (ino 261) |-- n1/ (ino 258) |-- n2/ (ino 259) |-- t7/ (ino 262) |-- t3/ (ino 267) And the send snapshot's directory hierarchy is the following: . (ino 256) |-- data/ (ino 257) |-- n4/ (ino 260) |-- n1/ (ino 258) |-- t2/ (ino 265) |-- n2/ (ino 259) |-- t3/ (ino 267) | |-- t7 (ino 264) | |-- t6/ (ino 261) | |-- t4/ (ino 266) | |-- t5/ (ino 263) | |-- t7/ (ino 262) While processing inode 262 we orphanize inode 264 and later attempt to rename inode 264 to its new name/location, which resulted in building an incorrect destination path string for the rename operation with the value "data/n4/t2/t7/t4/t5/t6/n2/t7/t3/t7". This rename operation must have been done only after inode 267 is processed and renamed, as the ancestor-descendent relationship between inodes 264 and 267 was reversed between both snapshots, because otherwise it results in an infinite loop when building the path string for inode 264 when we are processing an inode with a number larger than 264. That loop is the following: start inode 264, send progress of 265 for example parent of 264 -> 267 parent of 267 -> 262 parent of 262 -> 259 parent of 259 -> 261 parent of 261 -> 263 parent of 263 -> 266 parent of 266 -> 264 |--> back to first iteration while current path string length is <= PATH_MAX, and fail with -ENOMEM otherwise So fix this by making the check if we need to delay a directory rename regardless of the current inode having been orphanized or not. A test case for fstests follows soon. Thanks to Robbie Ko for providing a reproducer for this problem. Reported-by: Robbie Ko <robbieko@synology.com> Signed-off-by: Filipe Manana <fdmanana@suse.com>
2015-04-09 14:09:14 +01:00
Btrfs: send, fix corner case for reference overwrite detection When the inode given to did_overwrite_ref() matches the current progress and has a reference that collides with the reference of other inode that has the same number as the current progress, we were always telling our caller that the inode's reference was overwritten, which is incorrect because the other inode might be a new inode (different generation number) in which case we must return false from did_overwrite_ref() so that its callers don't use an orphanized path for the inode (as it will never be orphanized, instead it will be unlinked and the new inode created later). The following test case for fstests reproduces the issue: seq=`basename $0` seqres=$RESULT_DIR/$seq echo "QA output created by $seq" tmp=/tmp/$$ status=1 # failure is the default! trap "_cleanup; exit \$status" 0 1 2 3 15 _cleanup() { rm -fr $send_files_dir rm -f $tmp.* } # get standard environment, filters and checks . ./common/rc . ./common/filter # real QA test starts here _supported_fs btrfs _supported_os Linux _require_scratch _need_to_be_root send_files_dir=$TEST_DIR/btrfs-test-$seq rm -f $seqres.full rm -fr $send_files_dir mkdir $send_files_dir _scratch_mkfs >>$seqres.full 2>&1 _scratch_mount # Create our test file with a single extent of 64K. mkdir -p $SCRATCH_MNT/foo $XFS_IO_PROG -f -c "pwrite -S 0xaa 0 64K" $SCRATCH_MNT/foo/bar \ | _filter_xfs_io _run_btrfs_util_prog subvolume snapshot -r $SCRATCH_MNT \ $SCRATCH_MNT/mysnap1 _run_btrfs_util_prog subvolume snapshot $SCRATCH_MNT \ $SCRATCH_MNT/mysnap2 echo "File digest before being replaced:" md5sum $SCRATCH_MNT/mysnap1/foo/bar | _filter_scratch # Remove the file and then create a new one in the same location with # the same name but with different content. This new file ends up # getting the same inode number as the previous one, because that inode # number was the highest inode number used by the snapshot's root and # therefore when attempting to find the a new inode number for the new # file, we end up reusing the same inode number. This happens because # currently btrfs uses the highest inode number summed by 1 for the # first inode created once a snapshot's root is loaded (done at # fs/btrfs/inode-map.c:btrfs_find_free_objectid in the linux kernel # tree). # Having these two different files in the snapshots with the same inode # number (but different generation numbers) caused the btrfs send code # to emit an incorrect path for the file when issuing an unlink # operation because it failed to realize they were different files. rm -f $SCRATCH_MNT/mysnap2/foo/bar $XFS_IO_PROG -f -c "pwrite -S 0xbb 0 96K" \ $SCRATCH_MNT/mysnap2/foo/bar | _filter_xfs_io _run_btrfs_util_prog subvolume snapshot -r $SCRATCH_MNT/mysnap2 \ $SCRATCH_MNT/mysnap2_ro _run_btrfs_util_prog send $SCRATCH_MNT/mysnap1 -f $send_files_dir/1.snap _run_btrfs_util_prog send -p $SCRATCH_MNT/mysnap1 \ $SCRATCH_MNT/mysnap2_ro -f $send_files_dir/2.snap echo "File digest in the original filesystem after being replaced:" md5sum $SCRATCH_MNT/mysnap2_ro/foo/bar | _filter_scratch # Now recreate the filesystem by receiving both send streams and verify # we get the same file contents that the original filesystem had. _scratch_unmount _scratch_mkfs >>$seqres.full 2>&1 _scratch_mount _run_btrfs_util_prog receive -vv $SCRATCH_MNT -f $send_files_dir/1.snap _run_btrfs_util_prog receive -vv $SCRATCH_MNT -f $send_files_dir/2.snap echo "File digest in the new filesystem:" # Must match the digest from the new file. md5sum $SCRATCH_MNT/mysnap2_ro/foo/bar | _filter_scratch status=0 exit Reported-by: Martin Raiber <martin@urbackup.org> Fixes: 8b191a684968 ("Btrfs: incremental send, check if orphanized dir inode needs delayed rename") Signed-off-by: Filipe Manana <fdmanana@suse.com>
2015-09-26 15:30:23 +01:00
Btrfs: incremental send, check if orphanized dir inode needs delayed rename If a directory inode is orphanized, because some inode previously processed has a new name that collides with the old name of the current inode, we need to check if it needs its rename operation delayed too, as its ancestor-descendent relationship with some other inode might have been reversed between the parent and send snapshots and therefore its rename operation needs to happen after that other inode is renamed. For example, for the following reproducer where this is needed (provided by Robbie Ko): $ mkfs.btrfs -f /dev/sdb $ mount /dev/sdb /mnt $ mkfs.btrfs -f /dev/sdc $ mount /dev/sdc /mnt2 $ mkdir -p /mnt/data/n1/n2 $ mkdir /mnt/data/n4 $ mkdir -p /mnt/data/t6/t7 $ mkdir /mnt/data/t5 $ mkdir /mnt/data/t7 $ mkdir /mnt/data/n4/t2 $ mkdir /mnt/data/t4 $ mkdir /mnt/data/t3 $ mv /mnt/data/t7 /mnt/data/n4/t2 $ mv /mnt/data/t4 /mnt/data/n4/t2/t7 $ mv /mnt/data/t5 /mnt/data/n4/t2/t7/t4 $ mv /mnt/data/t6 /mnt/data/n4/t2/t7/t4/t5 $ mv /mnt/data/n1/n2 /mnt/data/n4/t2/t7/t4/t5/t6 $ mv /mnt/data/n1 /mnt/data/n4/t2/t7/t4/t5/t6 $ mv /mnt/data/n4/t2/t7/t4/t5/t6/t7 /mnt/data/n4/t2/t7/t4/t5/t6/n2 $ mv /mnt/data/t3 /mnt/data/n4/t2/t7/t4/t5/t6/n2/t7 $ btrfs subvolume snapshot -r /mnt /mnt/snap1 $ mv /mnt/data/n4/t2/t7/t4/t5/t6/n1 /mnt/data/n4 $ mv /mnt/data/n4/t2 /mnt/data/n4/n1 $ mv /mnt/data/n4/n1/t2/t7/t4/t5/t6/n2 /mnt/data/n4/n1/t2 $ mv /mnt/data/n4/n1/t2/n2/t7/t3 /mnt/data/n4/n1/t2 $ mv /mnt/data/n4/n1/t2/t7/t4/t5/t6 /mnt/data/n4/n1/t2 $ mv /mnt/data/n4/n1/t2/t7/t4 /mnt/data/n4/n1/t2/t6 $ mv /mnt/data/n4/n1/t2/t7 /mnt/data/n4/n1/t2/t3 $ mv /mnt/data/n4/n1/t2/n2/t7 /mnt/data/n4/n1/t2 $ btrfs subvolume snapshot -r /mnt /mnt/snap2 $ btrfs send /mnt/snap1 | btrfs receive /mnt2 $ btrfs send -p /mnt/snap1 /mnt/snap2 | btrfs receive /mnt2 ERROR: send ioctl failed with -12: Cannot allocate memory Where the parent snapshot directory hierarchy is the following: . (ino 256) |-- data/ (ino 257) |-- n4/ (ino 260) |-- t2/ (ino 265) |-- t7/ (ino 264) |-- t4/ (ino 266) |-- t5/ (ino 263) |-- t6/ (ino 261) |-- n1/ (ino 258) |-- n2/ (ino 259) |-- t7/ (ino 262) |-- t3/ (ino 267) And the send snapshot's directory hierarchy is the following: . (ino 256) |-- data/ (ino 257) |-- n4/ (ino 260) |-- n1/ (ino 258) |-- t2/ (ino 265) |-- n2/ (ino 259) |-- t3/ (ino 267) | |-- t7 (ino 264) | |-- t6/ (ino 261) | |-- t4/ (ino 266) | |-- t5/ (ino 263) | |-- t7/ (ino 262) While processing inode 262 we orphanize inode 264 and later attempt to rename inode 264 to its new name/location, which resulted in building an incorrect destination path string for the rename operation with the value "data/n4/t2/t7/t4/t5/t6/n2/t7/t3/t7". This rename operation must have been done only after inode 267 is processed and renamed, as the ancestor-descendent relationship between inodes 264 and 267 was reversed between both snapshots, because otherwise it results in an infinite loop when building the path string for inode 264 when we are processing an inode with a number larger than 264. That loop is the following: start inode 264, send progress of 265 for example parent of 264 -> 267 parent of 267 -> 262 parent of 262 -> 259 parent of 259 -> 261 parent of 261 -> 263 parent of 263 -> 266 parent of 266 -> 264 |--> back to first iteration while current path string length is <= PATH_MAX, and fail with -ENOMEM otherwise So fix this by making the check if we need to delay a directory rename regardless of the current inode having been orphanized or not. A test case for fstests follows soon. Thanks to Robbie Ko for providing a reproducer for this problem. Reported-by: Robbie Ko <robbieko@synology.com> Signed-off-by: Filipe Manana <fdmanana@suse.com>
2015-04-09 14:09:14 +01:00
Btrfs: send, fix corner case for reference overwrite detection When the inode given to did_overwrite_ref() matches the current progress and has a reference that collides with the reference of other inode that has the same number as the current progress, we were always telling our caller that the inode's reference was overwritten, which is incorrect because the other inode might be a new inode (different generation number) in which case we must return false from did_overwrite_ref() so that its callers don't use an orphanized path for the inode (as it will never be orphanized, instead it will be unlinked and the new inode created later). The following test case for fstests reproduces the issue: seq=`basename $0` seqres=$RESULT_DIR/$seq echo "QA output created by $seq" tmp=/tmp/$$ status=1 # failure is the default! trap "_cleanup; exit \$status" 0 1 2 3 15 _cleanup() { rm -fr $send_files_dir rm -f $tmp.* } # get standard environment, filters and checks . ./common/rc . ./common/filter # real QA test starts here _supported_fs btrfs _supported_os Linux _require_scratch _need_to_be_root send_files_dir=$TEST_DIR/btrfs-test-$seq rm -f $seqres.full rm -fr $send_files_dir mkdir $send_files_dir _scratch_mkfs >>$seqres.full 2>&1 _scratch_mount # Create our test file with a single extent of 64K. mkdir -p $SCRATCH_MNT/foo $XFS_IO_PROG -f -c "pwrite -S 0xaa 0 64K" $SCRATCH_MNT/foo/bar \ | _filter_xfs_io _run_btrfs_util_prog subvolume snapshot -r $SCRATCH_MNT \ $SCRATCH_MNT/mysnap1 _run_btrfs_util_prog subvolume snapshot $SCRATCH_MNT \ $SCRATCH_MNT/mysnap2 echo "File digest before being replaced:" md5sum $SCRATCH_MNT/mysnap1/foo/bar | _filter_scratch # Remove the file and then create a new one in the same location with # the same name but with different content. This new file ends up # getting the same inode number as the previous one, because that inode # number was the highest inode number used by the snapshot's root and # therefore when attempting to find the a new inode number for the new # file, we end up reusing the same inode number. This happens because # currently btrfs uses the highest inode number summed by 1 for the # first inode created once a snapshot's root is loaded (done at # fs/btrfs/inode-map.c:btrfs_find_free_objectid in the linux kernel # tree). # Having these two different files in the snapshots with the same inode # number (but different generation numbers) caused the btrfs send code # to emit an incorrect path for the file when issuing an unlink # operation because it failed to realize they were different files. rm -f $SCRATCH_MNT/mysnap2/foo/bar $XFS_IO_PROG -f -c "pwrite -S 0xbb 0 96K" \ $SCRATCH_MNT/mysnap2/foo/bar | _filter_xfs_io _run_btrfs_util_prog subvolume snapshot -r $SCRATCH_MNT/mysnap2 \ $SCRATCH_MNT/mysnap2_ro _run_btrfs_util_prog send $SCRATCH_MNT/mysnap1 -f $send_files_dir/1.snap _run_btrfs_util_prog send -p $SCRATCH_MNT/mysnap1 \ $SCRATCH_MNT/mysnap2_ro -f $send_files_dir/2.snap echo "File digest in the original filesystem after being replaced:" md5sum $SCRATCH_MNT/mysnap2_ro/foo/bar | _filter_scratch # Now recreate the filesystem by receiving both send streams and verify # we get the same file contents that the original filesystem had. _scratch_unmount _scratch_mkfs >>$seqres.full 2>&1 _scratch_mount _run_btrfs_util_prog receive -vv $SCRATCH_MNT -f $send_files_dir/1.snap _run_btrfs_util_prog receive -vv $SCRATCH_MNT -f $send_files_dir/2.snap echo "File digest in the new filesystem:" # Must match the digest from the new file. md5sum $SCRATCH_MNT/mysnap2_ro/foo/bar | _filter_scratch status=0 exit Reported-by: Martin Raiber <martin@urbackup.org> Fixes: 8b191a684968 ("Btrfs: incremental send, check if orphanized dir inode needs delayed rename") Signed-off-by: Filipe Manana <fdmanana@suse.com>
2015-09-26 15:30:23 +01:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: add/fix comments/documentation for send/receive As the subject already said, add/fix comments. Signed-off-by: Alexander Block <ablock84@googlemail.com>
2012-07-28 14:11:31 +02:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: cleanup unused arguments in send.c sctx is removed from the argument of the function that doesn't use sctx. Signed-off-by: Tsutomu Itoh <t-itoh@jp.fujitsu.com> Signed-off-by: Josef Bacik <jbacik@fusionio.com>
2013-05-08 07:51:52 +00:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: cleanup unused arguments in send.c sctx is removed from the argument of the function that doesn't use sctx. Signed-off-by: Tsutomu Itoh <t-itoh@jp.fujitsu.com> Signed-off-by: Josef Bacik <jbacik@fusionio.com>
2013-05-08 07:51:52 +00:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: cleanup unused arguments in send.c sctx is removed from the argument of the function that doesn't use sctx. Signed-off-by: Tsutomu Itoh <t-itoh@jp.fujitsu.com> Signed-off-by: Josef Bacik <jbacik@fusionio.com>
2013-05-08 07:51:52 +00:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: add/fix comments/documentation for send/receive As the subject already said, add/fix comments. Signed-off-by: Alexander Block <ablock84@googlemail.com>
2012-07-28 14:11:31 +02:00
Btrfs: free nce and nce_head on error in name_cache_insert Both were leaked in case of error. Reported-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com> Signed-off-by: Alexander Block <ablock84@googlemail.com>
2012-08-01 12:07:43 +02:00
Btrfs: add/fix comments/documentation for send/receive As the subject already said, add/fix comments. Signed-off-by: Alexander Block <ablock84@googlemail.com>
2012-07-28 14:11:31 +02:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: fix use of radix_tree for name_cache in send/receive We can't easily use the index of the radix tree for inums as the radix tree uses 32bit indexes on 32bit kernels. For 32bit kernels, we now use the lower 32bit of the inum as index and an additional list to store multiple entries per radix tree entry. Reported-by: Arne Jansen <sensille@gmx.net> Signed-off-by: Alexander Block <ablock84@googlemail.com>
2012-07-28 14:20:58 +02:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: fix use of radix_tree for name_cache in send/receive We can't easily use the index of the radix tree for inums as the radix tree uses 32bit indexes on 32bit kernels. For 32bit kernels, we now use the lower 32bit of the inum as index and an additional list to store multiple entries per radix tree entry. Reported-by: Arne Jansen <sensille@gmx.net> Signed-off-by: Alexander Block <ablock84@googlemail.com>
2012-07-28 14:20:58 +02:00
Btrfs: fix memory leak in name_cache_insert() We should free name_cache_entry before returning from the error handling code. Signed-off-by: Tsutomu Itoh <t-itoh@jp.fujitsu.com>
2012-12-17 06:38:51 +00:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: fix memory leak in name_cache_insert() We should free name_cache_entry before returning from the error handling code. Signed-off-by: Tsutomu Itoh <t-itoh@jp.fujitsu.com>
2012-12-17 06:38:51 +00:00
Btrfs: fix use of radix_tree for name_cache in send/receive We can't easily use the index of the radix tree for inums as the radix tree uses 32bit indexes on 32bit kernels. For 32bit kernels, we now use the lower 32bit of the inum as index and an additional list to store multiple entries per radix tree entry. Reported-by: Arne Jansen <sensille@gmx.net> Signed-off-by: Alexander Block <ablock84@googlemail.com>
2012-07-28 14:20:58 +02:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: fix use of radix_tree for name_cache in send/receive We can't easily use the index of the radix tree for inums as the radix tree uses 32bit indexes on 32bit kernels. For 32bit kernels, we now use the lower 32bit of the inum as index and an additional list to store multiple entries per radix tree entry. Reported-by: Arne Jansen <sensille@gmx.net> Signed-off-by: Alexander Block <ablock84@googlemail.com>
2012-07-28 14:20:58 +02:00
Btrfs: free nce and nce_head on error in name_cache_insert Both were leaked in case of error. Reported-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com> Signed-off-by: Alexander Block <ablock84@googlemail.com>
2012-08-01 12:07:43 +02:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: free nce and nce_head on error in name_cache_insert Both were leaked in case of error. Reported-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com> Signed-off-by: Alexander Block <ablock84@googlemail.com>
2012-08-01 12:07:43 +02:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: fix use of radix_tree for name_cache in send/receive We can't easily use the index of the radix tree for inums as the radix tree uses 32bit indexes on 32bit kernels. For 32bit kernels, we now use the lower 32bit of the inum as index and an additional list to store multiple entries per radix tree entry. Reported-by: Arne Jansen <sensille@gmx.net> Signed-off-by: Alexander Block <ablock84@googlemail.com>
2012-07-28 14:20:58 +02:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: fix use of radix_tree for name_cache in send/receive We can't easily use the index of the radix tree for inums as the radix tree uses 32bit indexes on 32bit kernels. For 32bit kernels, we now use the lower 32bit of the inum as index and an additional list to store multiple entries per radix tree entry. Reported-by: Arne Jansen <sensille@gmx.net> Signed-off-by: Alexander Block <ablock84@googlemail.com>
2012-07-28 14:20:58 +02:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: fix use of radix_tree for name_cache in send/receive We can't easily use the index of the radix tree for inums as the radix tree uses 32bit indexes on 32bit kernels. For 32bit kernels, we now use the lower 32bit of the inum as index and an additional list to store multiple entries per radix tree entry. Reported-by: Arne Jansen <sensille@gmx.net> Signed-off-by: Alexander Block <ablock84@googlemail.com>
2012-07-28 14:20:58 +02:00
btrfs: send: remove BUG_ON from name_cache_delete If cleaning the name cache fails, we could try to proceed at the cost of some memory leak. This is not expected to happen often. Signed-off-by: David Sterba <dsterba@suse.cz> Signed-off-by: Josef Bacik <jbacik@fb.com>
2014-02-03 19:24:40 +01:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: fix use of radix_tree for name_cache in send/receive We can't easily use the index of the radix tree for inums as the radix tree uses 32bit indexes on 32bit kernels. For 32bit kernels, we now use the lower 32bit of the inum as index and an additional list to store multiple entries per radix tree entry. Reported-by: Arne Jansen <sensille@gmx.net> Signed-off-by: Alexander Block <ablock84@googlemail.com>
2012-07-28 14:20:58 +02:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: fix use of radix_tree for name_cache in send/receive We can't easily use the index of the radix tree for inums as the radix tree uses 32bit indexes on 32bit kernels. For 32bit kernels, we now use the lower 32bit of the inum as index and an additional list to store multiple entries per radix tree entry. Reported-by: Arne Jansen <sensille@gmx.net> Signed-off-by: Alexander Block <ablock84@googlemail.com>
2012-07-28 14:20:58 +02:00
btrfs: send: remove BUG_ON from name_cache_delete If cleaning the name cache fails, we could try to proceed at the cost of some memory leak. This is not expected to happen often. Signed-off-by: David Sterba <dsterba@suse.cz> Signed-off-by: Josef Bacik <jbacik@fb.com>
2014-02-03 19:24:40 +01:00
Btrfs: fix use of radix_tree for name_cache in send/receive We can't easily use the index of the radix tree for inums as the radix tree uses 32bit indexes on 32bit kernels. For 32bit kernels, we now use the lower 32bit of the inum as index and an additional list to store multiple entries per radix tree entry. Reported-by: Arne Jansen <sensille@gmx.net> Signed-off-by: Alexander Block <ablock84@googlemail.com>
2012-07-28 14:20:58 +02:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: fix use of radix_tree for name_cache in send/receive We can't easily use the index of the radix tree for inums as the radix tree uses 32bit indexes on 32bit kernels. For 32bit kernels, we now use the lower 32bit of the inum as index and an additional list to store multiple entries per radix tree entry. Reported-by: Arne Jansen <sensille@gmx.net> Signed-off-by: Alexander Block <ablock84@googlemail.com>
2012-07-28 14:20:58 +02:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: fix use of radix_tree for name_cache in send/receive We can't easily use the index of the radix tree for inums as the radix tree uses 32bit indexes on 32bit kernels. For 32bit kernels, we now use the lower 32bit of the inum as index and an additional list to store multiple entries per radix tree entry. Reported-by: Arne Jansen <sensille@gmx.net> Signed-off-by: Alexander Block <ablock84@googlemail.com>
2012-07-28 14:20:58 +02:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: fix use of radix_tree for name_cache in send/receive We can't easily use the index of the radix tree for inums as the radix tree uses 32bit indexes on 32bit kernels. For 32bit kernels, we now use the lower 32bit of the inum as index and an additional list to store multiple entries per radix tree entry. Reported-by: Arne Jansen <sensille@gmx.net> Signed-off-by: Alexander Block <ablock84@googlemail.com>
2012-07-28 14:20:58 +02:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: add/fix comments/documentation for send/receive As the subject already said, add/fix comments. Signed-off-by: Alexander Block <ablock84@googlemail.com>
2012-07-28 14:11:31 +02:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: add/fix comments/documentation for send/receive As the subject already said, add/fix comments. Signed-off-by: Alexander Block <ablock84@googlemail.com>
2012-07-28 14:11:31 +02:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: code cleanups for send/receive Doing some code cleanups as suggested by Arne. Changes do not change any logic. Signed-off-by: Alexander Block <ablock84@googlemail.com>
2012-07-28 16:33:49 +02:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: fix memory leak for name_cache in send/receive When everything is done, name_cache_free is called which however forgot to call kfree on the cache entries. Signed-off-by: Alexander Block <ablock84@googlemail.com>
2012-07-28 14:13:35 +02:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: add/fix comments/documentation for send/receive As the subject already said, add/fix comments. Signed-off-by: Alexander Block <ablock84@googlemail.com>
2012-07-28 14:11:31 +02:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: add/fix comments/documentation for send/receive As the subject already said, add/fix comments. Signed-off-by: Alexander Block <ablock84@googlemail.com>
2012-07-28 14:11:31 +02:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: add/fix comments/documentation for send/receive As the subject already said, add/fix comments. Signed-off-by: Alexander Block <ablock84@googlemail.com>
2012-07-28 14:11:31 +02:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: add/fix comments/documentation for send/receive As the subject already said, add/fix comments. Signed-off-by: Alexander Block <ablock84@googlemail.com>
2012-07-28 14:11:31 +02:00
Btrfs: fix send issuing outdated paths for utimes, chown and chmod When doing an incremental send, if we had a directory pending a move/rename operation and none of its parents, except for the immediate parent, were pending a move/rename, after processing the directory's references, we would be issuing utimes, chown and chmod intructions against am outdated path - a path which matched the one in the parent root. This change also simplifies a bit the code that deals with building a path for a directory which has a move/rename operation delayed. Steps to reproduce: $ mkfs.btrfs -f /dev/sdb3 $ mount /dev/sdb3 /mnt/btrfs $ mkdir -p /mnt/btrfs/a/b/c/d/e $ mkdir /mnt/btrfs/a/b/c/f $ chmod 0777 /mnt/btrfs/a/b/c/d/e $ btrfs subvolume snapshot -r /mnt/btrfs /mnt/btrfs/snap1 $ btrfs send /mnt/btrfs/snap1 -f /tmp/base.send $ mv /mnt/btrfs/a/b/c/f /mnt/btrfs/a/b/f2 $ mv /mnt/btrfs/a/b/c/d/e /mnt/btrfs/a/b/f2/e2 $ mv /mnt/btrfs/a/b/c /mnt/btrfs/a/b/c2 $ mv /mnt/btrfs/a/b/c2/d /mnt/btrfs/a/b/c2/d2 $ chmod 0700 /mnt/btrfs/a/b/f2/e2 $ btrfs subvolume snapshot -r /mnt/btrfs /mnt/btrfs/snap2 $ btrfs send -p /mnt/btrfs/snap1 /mnt/btrfs/snap2 -f /tmp/incremental.send $ umount /mnt/btrfs $ mkfs.btrfs -f /dev/sdb3 $ mount /dev/sdb3 /mnt/btrfs $ btrfs receive /mnt/btrfs -f /tmp/base.send $ btrfs receive /mnt/btrfs -f /tmp/incremental.send The second btrfs receive command failed with: ERROR: chmod a/b/c/d/e failed. No such file or directory A test case for xfstests follows. Signed-off-by: Filipe David Borba Manana <fdmanana@gmail.com> Signed-off-by: Josef Bacik <jbacik@fb.com>
2014-02-21 00:01:32 +00:00
Btrfs: cleanup unused arguments in send.c sctx is removed from the argument of the function that doesn't use sctx. Signed-off-by: Tsutomu Itoh <t-itoh@jp.fujitsu.com> Signed-off-by: Josef Bacik <jbacik@fusionio.com>
2013-05-08 07:51:52 +00:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: cleanup unused arguments in send.c sctx is removed from the argument of the function that doesn't use sctx. Signed-off-by: Tsutomu Itoh <t-itoh@jp.fujitsu.com> Signed-off-by: Josef Bacik <jbacik@fusionio.com>
2013-05-08 07:51:52 +00:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: add/fix comments/documentation for send/receive As the subject already said, add/fix comments. Signed-off-by: Alexander Block <ablock84@googlemail.com>
2012-07-28 14:11:31 +02:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: add/fix comments/documentation for send/receive As the subject already said, add/fix comments. Signed-off-by: Alexander Block <ablock84@googlemail.com>
2012-07-28 14:11:31 +02:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: cleanup unused arguments in send.c sctx is removed from the argument of the function that doesn't use sctx. Signed-off-by: Tsutomu Itoh <t-itoh@jp.fujitsu.com> Signed-off-by: Josef Bacik <jbacik@fusionio.com>
2013-05-08 07:51:52 +00:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: incremental send, check if orphanized dir inode needs delayed rename If a directory inode is orphanized, because some inode previously processed has a new name that collides with the old name of the current inode, we need to check if it needs its rename operation delayed too, as its ancestor-descendent relationship with some other inode might have been reversed between the parent and send snapshots and therefore its rename operation needs to happen after that other inode is renamed. For example, for the following reproducer where this is needed (provided by Robbie Ko): $ mkfs.btrfs -f /dev/sdb $ mount /dev/sdb /mnt $ mkfs.btrfs -f /dev/sdc $ mount /dev/sdc /mnt2 $ mkdir -p /mnt/data/n1/n2 $ mkdir /mnt/data/n4 $ mkdir -p /mnt/data/t6/t7 $ mkdir /mnt/data/t5 $ mkdir /mnt/data/t7 $ mkdir /mnt/data/n4/t2 $ mkdir /mnt/data/t4 $ mkdir /mnt/data/t3 $ mv /mnt/data/t7 /mnt/data/n4/t2 $ mv /mnt/data/t4 /mnt/data/n4/t2/t7 $ mv /mnt/data/t5 /mnt/data/n4/t2/t7/t4 $ mv /mnt/data/t6 /mnt/data/n4/t2/t7/t4/t5 $ mv /mnt/data/n1/n2 /mnt/data/n4/t2/t7/t4/t5/t6 $ mv /mnt/data/n1 /mnt/data/n4/t2/t7/t4/t5/t6 $ mv /mnt/data/n4/t2/t7/t4/t5/t6/t7 /mnt/data/n4/t2/t7/t4/t5/t6/n2 $ mv /mnt/data/t3 /mnt/data/n4/t2/t7/t4/t5/t6/n2/t7 $ btrfs subvolume snapshot -r /mnt /mnt/snap1 $ mv /mnt/data/n4/t2/t7/t4/t5/t6/n1 /mnt/data/n4 $ mv /mnt/data/n4/t2 /mnt/data/n4/n1 $ mv /mnt/data/n4/n1/t2/t7/t4/t5/t6/n2 /mnt/data/n4/n1/t2 $ mv /mnt/data/n4/n1/t2/n2/t7/t3 /mnt/data/n4/n1/t2 $ mv /mnt/data/n4/n1/t2/t7/t4/t5/t6 /mnt/data/n4/n1/t2 $ mv /mnt/data/n4/n1/t2/t7/t4 /mnt/data/n4/n1/t2/t6 $ mv /mnt/data/n4/n1/t2/t7 /mnt/data/n4/n1/t2/t3 $ mv /mnt/data/n4/n1/t2/n2/t7 /mnt/data/n4/n1/t2 $ btrfs subvolume snapshot -r /mnt /mnt/snap2 $ btrfs send /mnt/snap1 | btrfs receive /mnt2 $ btrfs send -p /mnt/snap1 /mnt/snap2 | btrfs receive /mnt2 ERROR: send ioctl failed with -12: Cannot allocate memory Where the parent snapshot directory hierarchy is the following: . (ino 256) |-- data/ (ino 257) |-- n4/ (ino 260) |-- t2/ (ino 265) |-- t7/ (ino 264) |-- t4/ (ino 266) |-- t5/ (ino 263) |-- t6/ (ino 261) |-- n1/ (ino 258) |-- n2/ (ino 259) |-- t7/ (ino 262) |-- t3/ (ino 267) And the send snapshot's directory hierarchy is the following: . (ino 256) |-- data/ (ino 257) |-- n4/ (ino 260) |-- n1/ (ino 258) |-- t2/ (ino 265) |-- n2/ (ino 259) |-- t3/ (ino 267) | |-- t7 (ino 264) | |-- t6/ (ino 261) | |-- t4/ (ino 266) | |-- t5/ (ino 263) | |-- t7/ (ino 262) While processing inode 262 we orphanize inode 264 and later attempt to rename inode 264 to its new name/location, which resulted in building an incorrect destination path string for the rename operation with the value "data/n4/t2/t7/t4/t5/t6/n2/t7/t3/t7". This rename operation must have been done only after inode 267 is processed and renamed, as the ancestor-descendent relationship between inodes 264 and 267 was reversed between both snapshots, because otherwise it results in an infinite loop when building the path string for inode 264 when we are processing an inode with a number larger than 264. That loop is the following: start inode 264, send progress of 265 for example parent of 264 -> 267 parent of 267 -> 262 parent of 262 -> 259 parent of 259 -> 261 parent of 261 -> 263 parent of 263 -> 266 parent of 266 -> 264 |--> back to first iteration while current path string length is <= PATH_MAX, and fail with -ENOMEM otherwise So fix this by making the check if we need to delay a directory rename regardless of the current inode having been orphanized or not. A test case for fstests follows soon. Thanks to Robbie Ko for providing a reproducer for this problem. Reported-by: Robbie Ko <robbieko@synology.com> Signed-off-by: Filipe Manana <fdmanana@suse.com>
2015-04-09 14:09:14 +01:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: fix send attempting to rmdir non-empty directories The incremental send algorithm assumed that it was possible to issue a directory remove (rmdir) if the the inode number it was currently processing was greater than (or equal) to any inode that referenced the directory's inode. This wasn't a valid assumption because any such inode might be a child directory that is pending a move/rename operation, because it was moved into a directory that has a higher inode number and was moved/renamed too - in other words, the case the following commit addressed: 9f03740a956d7ac6a1b8f8c455da6fa5cae11c22 (Btrfs: fix infinite path build loops in incremental send) This made an incremental send issue an rmdir operation before the target directory was actually empty, which made btrfs receive fail. Therefore it needs to wait for all pending child directory inodes to be moved/renamed before sending an rmdir operation. Simple steps to reproduce this issue: $ mkfs.btrfs -f /dev/sdb3 $ mount /dev/sdb3 /mnt/btrfs $ mkdir -p /mnt/btrfs/a/b/c/x $ mkdir /mnt/btrfs/a/b/y $ btrfs subvolume snapshot -r /mnt/btrfs /mnt/btrfs/snap1 $ btrfs send /mnt/btrfs/snap1 -f /tmp/base.send $ mv /mnt/btrfs/a/b/y /mnt/btrfs/a/b/YY $ mv /mnt/btrfs/a/b/c/x /mnt/btrfs/a/b/YY $ rmdir /mnt/btrfs/a/b/c $ btrfs subvolume snapshot -r /mnt/btrfs /mnt/btrfs/snap2 $ btrfs send -p /mnt/btrfs/snap1 /mnt/btrfs/snap2 -f /tmp/incremental.send $ umount /mnt/btrfs $ mkfs.btrfs -f /dev/sdb3 $ mount /dev/sdb3 /mnt/btrfs $ btrfs receive /mnt/btrfs -f /tmp/base.send $ btrfs receive /mnt/btrfs -f /tmp/incremental.send The second btrfs receive command failed with: ERROR: rmdir o259-6-0 failed. Directory not empty A test case for xfstests follows. Signed-off-by: Filipe David Borba Manana <fdmanana@gmail.com> Signed-off-by: Josef Bacik <jbacik@fb.com>
2014-02-19 14:31:44 +00:00
Btrfs: incremental send, check if orphanized dir inode needs delayed rename If a directory inode is orphanized, because some inode previously processed has a new name that collides with the old name of the current inode, we need to check if it needs its rename operation delayed too, as its ancestor-descendent relationship with some other inode might have been reversed between the parent and send snapshots and therefore its rename operation needs to happen after that other inode is renamed. For example, for the following reproducer where this is needed (provided by Robbie Ko): $ mkfs.btrfs -f /dev/sdb $ mount /dev/sdb /mnt $ mkfs.btrfs -f /dev/sdc $ mount /dev/sdc /mnt2 $ mkdir -p /mnt/data/n1/n2 $ mkdir /mnt/data/n4 $ mkdir -p /mnt/data/t6/t7 $ mkdir /mnt/data/t5 $ mkdir /mnt/data/t7 $ mkdir /mnt/data/n4/t2 $ mkdir /mnt/data/t4 $ mkdir /mnt/data/t3 $ mv /mnt/data/t7 /mnt/data/n4/t2 $ mv /mnt/data/t4 /mnt/data/n4/t2/t7 $ mv /mnt/data/t5 /mnt/data/n4/t2/t7/t4 $ mv /mnt/data/t6 /mnt/data/n4/t2/t7/t4/t5 $ mv /mnt/data/n1/n2 /mnt/data/n4/t2/t7/t4/t5/t6 $ mv /mnt/data/n1 /mnt/data/n4/t2/t7/t4/t5/t6 $ mv /mnt/data/n4/t2/t7/t4/t5/t6/t7 /mnt/data/n4/t2/t7/t4/t5/t6/n2 $ mv /mnt/data/t3 /mnt/data/n4/t2/t7/t4/t5/t6/n2/t7 $ btrfs subvolume snapshot -r /mnt /mnt/snap1 $ mv /mnt/data/n4/t2/t7/t4/t5/t6/n1 /mnt/data/n4 $ mv /mnt/data/n4/t2 /mnt/data/n4/n1 $ mv /mnt/data/n4/n1/t2/t7/t4/t5/t6/n2 /mnt/data/n4/n1/t2 $ mv /mnt/data/n4/n1/t2/n2/t7/t3 /mnt/data/n4/n1/t2 $ mv /mnt/data/n4/n1/t2/t7/t4/t5/t6 /mnt/data/n4/n1/t2 $ mv /mnt/data/n4/n1/t2/t7/t4 /mnt/data/n4/n1/t2/t6 $ mv /mnt/data/n4/n1/t2/t7 /mnt/data/n4/n1/t2/t3 $ mv /mnt/data/n4/n1/t2/n2/t7 /mnt/data/n4/n1/t2 $ btrfs subvolume snapshot -r /mnt /mnt/snap2 $ btrfs send /mnt/snap1 | btrfs receive /mnt2 $ btrfs send -p /mnt/snap1 /mnt/snap2 | btrfs receive /mnt2 ERROR: send ioctl failed with -12: Cannot allocate memory Where the parent snapshot directory hierarchy is the following: . (ino 256) |-- data/ (ino 257) |-- n4/ (ino 260) |-- t2/ (ino 265) |-- t7/ (ino 264) |-- t4/ (ino 266) |-- t5/ (ino 263) |-- t6/ (ino 261) |-- n1/ (ino 258) |-- n2/ (ino 259) |-- t7/ (ino 262) |-- t3/ (ino 267) And the send snapshot's directory hierarchy is the following: . (ino 256) |-- data/ (ino 257) |-- n4/ (ino 260) |-- n1/ (ino 258) |-- t2/ (ino 265) |-- n2/ (ino 259) |-- t3/ (ino 267) | |-- t7 (ino 264) | |-- t6/ (ino 261) | |-- t4/ (ino 266) | |-- t5/ (ino 263) | |-- t7/ (ino 262) While processing inode 262 we orphanize inode 264 and later attempt to rename inode 264 to its new name/location, which resulted in building an incorrect destination path string for the rename operation with the value "data/n4/t2/t7/t4/t5/t6/n2/t7/t3/t7". This rename operation must have been done only after inode 267 is processed and renamed, as the ancestor-descendent relationship between inodes 264 and 267 was reversed between both snapshots, because otherwise it results in an infinite loop when building the path string for inode 264 when we are processing an inode with a number larger than 264. That loop is the following: start inode 264, send progress of 265 for example parent of 264 -> 267 parent of 267 -> 262 parent of 262 -> 259 parent of 259 -> 261 parent of 261 -> 263 parent of 263 -> 266 parent of 266 -> 264 |--> back to first iteration while current path string length is <= PATH_MAX, and fail with -ENOMEM otherwise So fix this by making the check if we need to delay a directory rename regardless of the current inode having been orphanized or not. A test case for fstests follows soon. Thanks to Robbie Ko for providing a reproducer for this problem. Reported-by: Robbie Ko <robbieko@synology.com> Signed-off-by: Filipe Manana <fdmanana@suse.com>
2015-04-09 14:09:14 +01:00
Btrfs: fix send issuing outdated paths for utimes, chown and chmod When doing an incremental send, if we had a directory pending a move/rename operation and none of its parents, except for the immediate parent, were pending a move/rename, after processing the directory's references, we would be issuing utimes, chown and chmod intructions against am outdated path - a path which matched the one in the parent root. This change also simplifies a bit the code that deals with building a path for a directory which has a move/rename operation delayed. Steps to reproduce: $ mkfs.btrfs -f /dev/sdb3 $ mount /dev/sdb3 /mnt/btrfs $ mkdir -p /mnt/btrfs/a/b/c/d/e $ mkdir /mnt/btrfs/a/b/c/f $ chmod 0777 /mnt/btrfs/a/b/c/d/e $ btrfs subvolume snapshot -r /mnt/btrfs /mnt/btrfs/snap1 $ btrfs send /mnt/btrfs/snap1 -f /tmp/base.send $ mv /mnt/btrfs/a/b/c/f /mnt/btrfs/a/b/f2 $ mv /mnt/btrfs/a/b/c/d/e /mnt/btrfs/a/b/f2/e2 $ mv /mnt/btrfs/a/b/c /mnt/btrfs/a/b/c2 $ mv /mnt/btrfs/a/b/c2/d /mnt/btrfs/a/b/c2/d2 $ chmod 0700 /mnt/btrfs/a/b/f2/e2 $ btrfs subvolume snapshot -r /mnt/btrfs /mnt/btrfs/snap2 $ btrfs send -p /mnt/btrfs/snap1 /mnt/btrfs/snap2 -f /tmp/incremental.send $ umount /mnt/btrfs $ mkfs.btrfs -f /dev/sdb3 $ mount /dev/sdb3 /mnt/btrfs $ btrfs receive /mnt/btrfs -f /tmp/base.send $ btrfs receive /mnt/btrfs -f /tmp/incremental.send The second btrfs receive command failed with: ERROR: chmod a/b/c/d/e failed. No such file or directory A test case for xfstests follows. Signed-off-by: Filipe David Borba Manana <fdmanana@gmail.com> Signed-off-by: Josef Bacik <jbacik@fb.com>
2014-02-21 00:01:32 +00:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: fix infinite path build loops in incremental send The send operation processes inodes by their ascending number, and assumes that any rename/move operation can be successfully performed (sent to the caller) once all previous inodes (those with a smaller inode number than the one we're currently processing) were processed. This is not true when an incremental send had to process an hierarchical change between 2 snapshots where the parent-children relationship between directory inodes was reversed - that is, parents became children and children became parents. This situation made the path building code go into an infinite loop, which kept allocating more and more memory that eventually lead to a krealloc warning being displayed in dmesg: WARNING: CPU: 1 PID: 5705 at mm/page_alloc.c:2477 __alloc_pages_nodemask+0x365/0xad0() Modules linked in: btrfs raid6_pq xor pci_stub vboxpci(O) vboxnetadp(O) vboxnetflt(O) vboxdrv(O) snd_hda_codec_hdmi snd_hda_codec_realtek joydev radeon snd_hda_intel snd_hda_codec snd_hwdep snd_seq_midi snd_pcm psmouse i915 snd_rawmidi serio_raw snd_seq_midi_event lpc_ich snd_seq snd_timer ttm snd_seq_device rfcomm drm_kms_helper parport_pc bnep bluetooth drm ppdev snd soundcore i2c_algo_bit snd_page_alloc binfmt_misc video lp parport r8169 mii hid_generic usbhid hid CPU: 1 PID: 5705 Comm: btrfs Tainted: G O 3.13.0-rc7-fdm-btrfs-next-18+ #3 Hardware name: To Be Filled By O.E.M. To Be Filled By O.E.M./Z77 Pro4, BIOS P1.50 09/04/2012 [ 5381.660441] 00000000000009ad ffff8806f6f2f4e8 ffffffff81777434 0000000000000007 [ 5381.660447] 0000000000000000 ffff8806f6f2f528 ffffffff8104a9ec ffff8807038f36f0 [ 5381.660452] 0000000000000000 0000000000000206 ffff8807038f2490 ffff8807038f36f0 [ 5381.660457] Call Trace: [ 5381.660464] [<ffffffff81777434>] dump_stack+0x4e/0x68 [ 5381.660471] [<ffffffff8104a9ec>] warn_slowpath_common+0x8c/0xc0 [ 5381.660476] [<ffffffff8104aa3a>] warn_slowpath_null+0x1a/0x20 [ 5381.660480] [<ffffffff81144995>] __alloc_pages_nodemask+0x365/0xad0 [ 5381.660487] [<ffffffff8108313f>] ? local_clock+0x4f/0x60 [ 5381.660491] [<ffffffff811430e8>] ? free_one_page+0x98/0x440 [ 5381.660495] [<ffffffff8108313f>] ? local_clock+0x4f/0x60 [ 5381.660502] [<ffffffff8113fae4>] ? __get_free_pages+0x14/0x50 [ 5381.660508] [<ffffffff81095fb8>] ? trace_hardirqs_off_caller+0x28/0xd0 [ 5381.660515] [<ffffffff81183caf>] alloc_pages_current+0x10f/0x1f0 [ 5381.660520] [<ffffffff8113fae4>] ? __get_free_pages+0x14/0x50 [ 5381.660524] [<ffffffff8113fae4>] __get_free_pages+0x14/0x50 [ 5381.660530] [<ffffffff8115dace>] kmalloc_order_trace+0x3e/0x100 [ 5381.660536] [<ffffffff81191ea0>] __kmalloc_track_caller+0x220/0x230 [ 5381.660560] [<ffffffffa0729fdb>] ? fs_path_ensure_buf.part.12+0x6b/0x200 [btrfs] [ 5381.660564] [<ffffffff8178085c>] ? retint_restore_args+0xe/0xe [ 5381.660569] [<ffffffff811580ef>] krealloc+0x6f/0xb0 [ 5381.660586] [<ffffffffa0729fdb>] fs_path_ensure_buf.part.12+0x6b/0x200 [btrfs] [ 5381.660601] [<ffffffffa072a208>] fs_path_prepare_for_add+0x98/0xb0 [btrfs] [ 5381.660615] [<ffffffffa072a2bc>] fs_path_add_path+0x2c/0x60 [btrfs] [ 5381.660628] [<ffffffffa072c55c>] get_cur_path+0x7c/0x1c0 [btrfs] Even without this loop, the incremental send couldn't succeed, because it would attempt to send a rename/move operation for the lower inode before the highest inode number was renamed/move. This issue is easy to trigger with the following steps: $ mkfs.btrfs -f /dev/sdb3 $ mount /dev/sdb3 /mnt/btrfs $ mkdir -p /mnt/btrfs/a/b/c/d $ mkdir /mnt/btrfs/a/b/c2 $ btrfs subvol snapshot -r /mnt/btrfs /mnt/btrfs/snap1 $ mv /mnt/btrfs/a/b/c/d /mnt/btrfs/a/b/c2/d2 $ mv /mnt/btrfs/a/b/c /mnt/btrfs/a/b/c2/d2/cc $ btrfs subvol snapshot -r /mnt/btrfs /mnt/btrfs/snap2 $ btrfs send -p /mnt/btrfs/snap1 /mnt/btrfs/snap2 > /tmp/incremental.send The structure of the filesystem when the first snapshot is taken is: . (ino 256) |-- a (ino 257) |-- b (ino 258) |-- c (ino 259) | |-- d (ino 260) | |-- c2 (ino 261) And its structure when the second snapshot is taken is: . (ino 256) |-- a (ino 257) |-- b (ino 258) |-- c2 (ino 261) |-- d2 (ino 260) |-- cc (ino 259) Before the move/rename operation is performed for the inode 259, the move/rename for inode 260 must be performed, since 259 is now a child of 260. A test case for xfstests, with a more complex scenario, will follow soon. Signed-off-by: Filipe David Borba Manana <fdmanana@gmail.com> Signed-off-by: Josef Bacik <jbacik@fb.com> Signed-off-by: Chris Mason <clm@fb.com>
2014-01-22 10:00:53 +00:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: cleanup unused arguments in send.c sctx is removed from the argument of the function that doesn't use sctx. Signed-off-by: Tsutomu Itoh <t-itoh@jp.fujitsu.com> Signed-off-by: Josef Bacik <jbacik@fusionio.com>
2013-05-08 07:51:52 +00:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: fix wrong search path initialization before searching tree root To search tree root without transaction protection, we should neither search commit root nor skip locking here, fix it. Signed-off-by: Wang Shilong <wangsl.fnst@cn.fujitsu.com> Signed-off-by: Josef Bacik <jbacik@fb.com> Signed-off-by: Chris Mason <clm@fb.com>
2014-01-15 00:26:43 +08:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
btrfs: fix resending received snapshot with parent This fixes a regression introduced by 37b8d27d between v4.1 and v4.2. When a snapshot is received, its received_uuid is set to the original uuid of the subvolume. When that snapshot is then resent to a third filesystem, it's received_uuid is set to the second uuid instead of the original one. The same was true for the parent_uuid. This behaviour was partially changed in 37b8d27d, but in that patch only the parent_uuid was taken from the real original, not the uuid itself, causing the search for the parent to fail in the case below. This happens for example when trying to send a series of linked snapshots (e.g. created by snapper) from the backup file system back to the original one. The following commands reproduce the issue in v4.2.1 (no error in 4.1.6) # setup three test file systems for i in 1 2 3; do truncate -s 50M fs$i mkfs.btrfs fs$i mkdir $i mount fs$i $i done echo "content" > 1/testfile btrfs su snapshot -r 1/ 1/snap1 echo "changed content" > 1/testfile btrfs su snapshot -r 1/ 1/snap2 # works fine: btrfs send 1/snap1 | btrfs receive 2/ btrfs send -p 1/snap1 1/snap2 | btrfs receive 2/ # ERROR: could not find parent subvolume btrfs send 2/snap1 | btrfs receive 3/ btrfs send -p 2/snap1 2/snap2 | btrfs receive 3/ Signed-off-by: Robin Ruede <rruede+git@gmail.com> Fixes: 37b8d27de5d0 ("Btrfs: use received_uuid of parent during send") Cc: stable@vger.kernel.org # v4.2+ Reviewed-by: Filipe Manana <fdmanana@suse.com> Tested-by: Ed Tomlinson <edt@aei.ca>
2015-09-30 21:23:33 +02:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: fix pass of transid with wrong endianness in send.c fs/btrfs/send.c:2190:9: warning: incorrect type in argument 3 (different base types) fs/btrfs/send.c:2190:9: expected unsigned long long [unsigned] [usertype] value fs/btrfs/send.c:2190:9: got restricted __le64 [usertype] ctransid fs/btrfs/send.c:2195:17: warning: incorrect type in argument 3 (different base types) fs/btrfs/send.c:2195:17: expected unsigned long long [unsigned] [usertype] value fs/btrfs/send.c:2195:17: got restricted __le64 [usertype] ctransid fs/btrfs/send.c:3716:9: warning: incorrect type in argument 3 (different base types) fs/btrfs/send.c:3716:9: expected unsigned long long [unsigned] [usertype] value fs/btrfs/send.c:3716:9: got restricted __le64 [usertype] ctransid Signed-off-by: Filipe David Borba Manana <fdmanana@gmail.com> Signed-off-by: Josef Bacik <jbacik@fb.com> Signed-off-by: Chris Mason <clm@fb.com>
2013-12-03 15:55:48 +00:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: use received_uuid of parent during send Neil Horman pointed out a problem where if he did something like this receive A snap A B change B send -p A B and then on another box do recieve A receive B the receive B would fail because we use the UUID of A for the clone sources for B. This makes sense most of the time because normally you are sending from the original sources, not a received source. However when you use a recieved subvol its UUID is going to be something completely different, so if you then try to receive the diff on a different volume it won't find the UUID because the new A will be something else. The only constant is the received uuid. So instead check to see if we have received_uuid set on the root, and if so use that as the clone source, as btrfs receive looks for matches either in received_uuid or uuid. Thanks, Reported-by: Neil Horman <nhorman@redhat.com> Signed-off-by: Josef Bacik <jbacik@fb.com> Reviewed-by: Hugo Mills <hugo@carfax.org.uk> Signed-off-by: Chris Mason <clm@fb.com>
2015-06-04 17:17:25 -04:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: fix pass of transid with wrong endianness in send.c fs/btrfs/send.c:2190:9: warning: incorrect type in argument 3 (different base types) fs/btrfs/send.c:2190:9: expected unsigned long long [unsigned] [usertype] value fs/btrfs/send.c:2190:9: got restricted __le64 [usertype] ctransid fs/btrfs/send.c:2195:17: warning: incorrect type in argument 3 (different base types) fs/btrfs/send.c:2195:17: expected unsigned long long [unsigned] [usertype] value fs/btrfs/send.c:2195:17: got restricted __le64 [usertype] ctransid fs/btrfs/send.c:3716:9: warning: incorrect type in argument 3 (different base types) fs/btrfs/send.c:3716:9: expected unsigned long long [unsigned] [usertype] value fs/btrfs/send.c:3716:9: got restricted __le64 [usertype] ctransid Signed-off-by: Filipe David Borba Manana <fdmanana@gmail.com> Signed-off-by: Josef Bacik <jbacik@fb.com> Signed-off-by: Chris Mason <clm@fb.com>
2013-12-03 15:55:48 +00:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: cleanup unused arguments in send.c sctx is removed from the argument of the function that doesn't use sctx. Signed-off-by: Tsutomu Itoh <t-itoh@jp.fujitsu.com> Signed-off-by: Josef Bacik <jbacik@fusionio.com>
2013-05-08 07:51:52 +00:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: cleanup unused arguments in send.c sctx is removed from the argument of the function that doesn't use sctx. Signed-off-by: Tsutomu Itoh <t-itoh@jp.fujitsu.com> Signed-off-by: Josef Bacik <jbacik@fusionio.com>
2013-05-08 07:51:52 +00:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: cleanup unused arguments in send.c sctx is removed from the argument of the function that doesn't use sctx. Signed-off-by: Tsutomu Itoh <t-itoh@jp.fujitsu.com> Signed-off-by: Josef Bacik <jbacik@fusionio.com>
2013-05-08 07:51:52 +00:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: cleanup unused arguments in send.c sctx is removed from the argument of the function that doesn't use sctx. Signed-off-by: Tsutomu Itoh <t-itoh@jp.fujitsu.com> Signed-off-by: Josef Bacik <jbacik@fusionio.com>
2013-05-08 07:51:52 +00:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: cleanup unused arguments in send.c sctx is removed from the argument of the function that doesn't use sctx. Signed-off-by: Tsutomu Itoh <t-itoh@jp.fujitsu.com> Signed-off-by: Josef Bacik <jbacik@fusionio.com>
2013-05-08 07:51:52 +00:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: cleanup unused arguments in send.c sctx is removed from the argument of the function that doesn't use sctx. Signed-off-by: Tsutomu Itoh <t-itoh@jp.fujitsu.com> Signed-off-by: Josef Bacik <jbacik@fusionio.com>
2013-05-08 07:51:52 +00:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: cleanup unused arguments in send.c sctx is removed from the argument of the function that doesn't use sctx. Signed-off-by: Tsutomu Itoh <t-itoh@jp.fujitsu.com> Signed-off-by: Josef Bacik <jbacik@fusionio.com>
2013-05-08 07:51:52 +00:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
btrfs: kill btrfs_inode_*time helpers They just opencode taking address of the timespec member. Signed-off-by: David Sterba <dsterba@suse.cz> Signed-off-by: Chris Mason <clm@fb.com>
2014-12-12 17:39:12 +01:00
Btrfs: add/fix comments/documentation for send/receive As the subject already said, add/fix comments. Signed-off-by: Alexander Block <ablock84@googlemail.com>
2012-07-28 14:11:31 +02:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: cleanup unused arguments in send.c sctx is removed from the argument of the function that doesn't use sctx. Signed-off-by: Tsutomu Itoh <t-itoh@jp.fujitsu.com> Signed-off-by: Josef Bacik <jbacik@fusionio.com>
2013-05-08 07:51:52 +00:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: fix cur_ino < parent_ino case for send/receive When the current inodes inum is smaller then the inum of the parent directory strange things were happending due to wrong path resolution and other bugs. Fix this with a new approach for the problem. Reported-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com> Signed-off-by: Alexander Block <ablock84@googlemail.com>
2012-07-28 10:42:24 +02:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: fix cur_ino < parent_ino case for send/receive When the current inodes inum is smaller then the inum of the parent directory strange things were happending due to wrong path resolution and other bugs. Fix this with a new approach for the problem. Reported-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com> Signed-off-by: Alexander Block <ablock84@googlemail.com>
2012-07-28 10:42:24 +02:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: fix cur_ino < parent_ino case for send/receive When the current inodes inum is smaller then the inum of the parent directory strange things were happending due to wrong path resolution and other bugs. Fix this with a new approach for the problem. Reported-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com> Signed-off-by: Alexander Block <ablock84@googlemail.com>
2012-07-28 10:42:24 +02:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: fix cur_ino < parent_ino case for send/receive When the current inodes inum is smaller then the inum of the parent directory strange things were happending due to wrong path resolution and other bugs. Fix this with a new approach for the problem. Reported-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com> Signed-off-by: Alexander Block <ablock84@googlemail.com>
2012-07-28 10:42:24 +02:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: cleanup unused arguments in send.c sctx is removed from the argument of the function that doesn't use sctx. Signed-off-by: Tsutomu Itoh <t-itoh@jp.fujitsu.com> Signed-off-by: Josef Bacik <jbacik@fusionio.com>
2013-05-08 07:51:52 +00:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: skip search tree for REG files It is really unnecessary to search tree again for @gen, @mode and @rdev in the case of REG inodes' creation, as we've got btrfs_inode_item in sctx, and @gen, @mode and @rdev can easily be fetched. Signed-off-by: Liu Bo <bo.li.liu@oracle.com> Signed-off-by: Josef Bacik <jbacik@fb.com>
2014-02-27 17:29:01 +08:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: code cleanups for send/receive Doing some code cleanups as suggested by Arne. Changes do not change any logic. Signed-off-by: Alexander Block <ablock84@googlemail.com>
2012-07-28 16:33:49 +02:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: code cleanups for send/receive Doing some code cleanups as suggested by Arne. Changes do not change any logic. Signed-off-by: Alexander Block <ablock84@googlemail.com>
2012-07-28 16:33:49 +02:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: code cleanups for send/receive Doing some code cleanups as suggested by Arne. Changes do not change any logic. Signed-off-by: Alexander Block <ablock84@googlemail.com>
2012-07-28 16:33:49 +02:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: code cleanups for send/receive Doing some code cleanups as suggested by Arne. Changes do not change any logic. Signed-off-by: Alexander Block <ablock84@googlemail.com>
2012-07-28 16:33:49 +02:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: code cleanups for send/receive Doing some code cleanups as suggested by Arne. Changes do not change any logic. Signed-off-by: Alexander Block <ablock84@googlemail.com>
2012-07-28 16:33:49 +02:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: code cleanups for send/receive Doing some code cleanups as suggested by Arne. Changes do not change any logic. Signed-off-by: Alexander Block <ablock84@googlemail.com>
2012-07-28 16:33:49 +02:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: code cleanups for send/receive Doing some code cleanups as suggested by Arne. Changes do not change any logic. Signed-off-by: Alexander Block <ablock84@googlemail.com>
2012-07-28 16:33:49 +02:00
btrfs: switch more printks to our helpers Convert the simple cases, not all functions provide a way to reach the fs_info. Also skipped debugging messages (print-tree, integrity checker and pr_debug) and messages that are printed from possibly unfinished mount. Signed-off-by: David Sterba <dsterba@suse.com>
2015-10-08 11:37:06 +02:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: fix cur_ino < parent_ino case for send/receive When the current inodes inum is smaller then the inum of the parent directory strange things were happending due to wrong path resolution and other bugs. Fix this with a new approach for the problem. Reported-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com> Signed-off-by: Alexander Block <ablock84@googlemail.com>
2012-07-28 10:42:24 +02:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: fix cur_ino < parent_ino case for send/receive When the current inodes inum is smaller then the inum of the parent directory strange things were happending due to wrong path resolution and other bugs. Fix this with a new approach for the problem. Reported-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com> Signed-off-by: Alexander Block <ablock84@googlemail.com>
2012-07-28 10:42:24 +02:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: cleanup unused arguments in send.c sctx is removed from the argument of the function that doesn't use sctx. Signed-off-by: Tsutomu Itoh <t-itoh@jp.fujitsu.com> Signed-off-by: Josef Bacik <jbacik@fusionio.com>
2013-05-08 07:51:52 +00:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: send correct rdev and mode in btrfs-send When sending a device file, the stream was missing the mode. Also the rdev was encoded wrongly. Signed-off-by: Arne Jansen <sensille@gmx.net>
2012-10-15 18:28:46 +00:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: cleanup unused arguments in send.c sctx is removed from the argument of the function that doesn't use sctx. Signed-off-by: Tsutomu Itoh <t-itoh@jp.fujitsu.com> Signed-off-by: Josef Bacik <jbacik@fusionio.com>
2013-05-08 07:51:52 +00:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: fix cur_ino < parent_ino case for send/receive When the current inodes inum is smaller then the inum of the parent directory strange things were happending due to wrong path resolution and other bugs. Fix this with a new approach for the problem. Reported-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com> Signed-off-by: Alexander Block <ablock84@googlemail.com>
2012-07-28 10:42:24 +02:00
Btrfs: make some tree searches in send.c more efficient We have this pattern where we do search for a contiguous group of items in a tree and everytime we find an item, we process it, then we release our path, increment the offset of the search key, do another full tree search and repeat these steps until a tree search can't find more items we're interested in. Instead of doing these full tree searches after processing each item, just process the next item/slot in our leaf and don't release the path. Since all these trees are read only and we always use the commit root for a search and skip node/leaf locks, we're not affecting concurrency on the trees. Signed-off-by: Filipe David Borba Manana <fdmanana@gmail.com> Signed-off-by: Josef Bacik <jbacik@fb.com>
2014-02-05 16:48:56 +00:00
Btrfs: fix cur_ino < parent_ino case for send/receive When the current inodes inum is smaller then the inum of the parent directory strange things were happending due to wrong path resolution and other bugs. Fix this with a new approach for the problem. Reported-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com> Signed-off-by: Alexander Block <ablock84@googlemail.com>
2012-07-28 10:42:24 +02:00
Btrfs: make some tree searches in send.c more efficient We have this pattern where we do search for a contiguous group of items in a tree and everytime we find an item, we process it, then we release our path, increment the offset of the search key, do another full tree search and repeat these steps until a tree search can't find more items we're interested in. Instead of doing these full tree searches after processing each item, just process the next item/slot in our leaf and don't release the path. Since all these trees are read only and we always use the commit root for a search and skip node/leaf locks, we're not affecting concurrency on the trees. Signed-off-by: Filipe David Borba Manana <fdmanana@gmail.com> Signed-off-by: Josef Bacik <jbacik@fb.com>
2014-02-05 16:48:56 +00:00
Btrfs: fix cur_ino < parent_ino case for send/receive When the current inodes inum is smaller then the inum of the parent directory strange things were happending due to wrong path resolution and other bugs. Fix this with a new approach for the problem. Reported-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com> Signed-off-by: Alexander Block <ablock84@googlemail.com>
2012-07-28 10:42:24 +02:00
Btrfs: make some tree searches in send.c more efficient We have this pattern where we do search for a contiguous group of items in a tree and everytime we find an item, we process it, then we release our path, increment the offset of the search key, do another full tree search and repeat these steps until a tree search can't find more items we're interested in. Instead of doing these full tree searches after processing each item, just process the next item/slot in our leaf and don't release the path. Since all these trees are read only and we always use the commit root for a search and skip node/leaf locks, we're not affecting concurrency on the trees. Signed-off-by: Filipe David Borba Manana <fdmanana@gmail.com> Signed-off-by: Josef Bacik <jbacik@fb.com>
2014-02-05 16:48:56 +00:00
Btrfs: fix cur_ino < parent_ino case for send/receive When the current inodes inum is smaller then the inum of the parent directory strange things were happending due to wrong path resolution and other bugs. Fix this with a new approach for the problem. Reported-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com> Signed-off-by: Alexander Block <ablock84@googlemail.com>
2012-07-28 10:42:24 +02:00
Btrfs: skip subvol entries when checking if we've created a dir already We have logic to see if we've already created a parent directory by check to see if an inode inside of that directory has a lower inode number than the one we are currently processing. The logic is that if there is a lower inode number then we would have had to made sure the directory was created at that previous point. The problem is that subvols inode numbers count from the lowest objectid in the root tree, which may be less than our current progress. So just skip if our dir item key is a root item. This fixes the original test and the xfstest version I made that added an extra subvol create. Thanks, Reported-by: Emil Karlson <jekarlson@gmail.com> Signed-off-by: Josef Bacik <jbacik@fusionio.com> Signed-off-by: Chris Mason <chris.mason@fusionio.com>
2013-08-12 10:56:14 -04:00
Btrfs: fix cur_ino < parent_ino case for send/receive When the current inodes inum is smaller then the inum of the parent directory strange things were happending due to wrong path resolution and other bugs. Fix this with a new approach for the problem. Reported-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com> Signed-off-by: Alexander Block <ablock84@googlemail.com>
2012-07-28 10:42:24 +02:00
Btrfs: make some tree searches in send.c more efficient We have this pattern where we do search for a contiguous group of items in a tree and everytime we find an item, we process it, then we release our path, increment the offset of the search key, do another full tree search and repeat these steps until a tree search can't find more items we're interested in. Instead of doing these full tree searches after processing each item, just process the next item/slot in our leaf and don't release the path. Since all these trees are read only and we always use the commit root for a search and skip node/leaf locks, we're not affecting concurrency on the trees. Signed-off-by: Filipe David Borba Manana <fdmanana@gmail.com> Signed-off-by: Josef Bacik <jbacik@fb.com>
2014-02-05 16:48:56 +00:00
Btrfs: fix cur_ino < parent_ino case for send/receive When the current inodes inum is smaller then the inum of the parent directory strange things were happending due to wrong path resolution and other bugs. Fix this with a new approach for the problem. Reported-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com> Signed-off-by: Alexander Block <ablock84@googlemail.com>
2012-07-28 10:42:24 +02:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: share the same code for __record_{new,deleted}_ref This has no functional change, only picks out the same part of two functions, and makes it shared. Signed-off-by: Liu Bo <bo.li.liu@oracle.com> Signed-off-by: Josef Bacik <jbacik@fb.com>
2014-03-03 21:31:03 +08:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
btrfs: reuse kbasename helper To get name of the file from a pathname let's use kbasename() helper. It allows to simplify code a bit. Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Signed-off-by: Josef Bacik <jbacik@fusionio.com> Signed-off-by: Chris Mason <chris.mason@fusionio.com>
2013-08-21 10:32:13 +03:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
btrfs: reuse kbasename helper To get name of the file from a pathname let's use kbasename() helper. It allows to simplify code a bit. Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Signed-off-by: Josef Bacik <jbacik@fusionio.com> Signed-off-by: Chris Mason <chris.mason@fusionio.com>
2013-08-21 10:32:13 +03:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: fix send issues related to inode number reuse If you are sending a snapshot and specifying a parent snapshot we will walk the trees and figure out where they differ and send the differences only. The way we check for differences are if the leaves aren't the same and if the keys are not the same within the leaves. So if neither leaf is the same (ie the leaf has been cow'ed from the parent snapshot) we walk each item in the send root and check it against the parent root. If the items match exactly then we don't do anything. This doesn't quite work for inode refs, since they will just have the name and the parent objectid. If you move the file from a directory and then remove that directory and re-create a directory with the same inode number as the old directory and then move that file back into that directory we will assume that nothing changed and you will get errors when you try to receive. In order to fix this we need to do extra checking to see if the inode ref really is the same or not. So do this by passing down BTRFS_COMPARE_TREE_SAME if the items match. Then if the key type is an inode ref we can do some extra checking, otherwise we just keep processing. The extra checking is to look up the generation of the directory in the parent volume and compare it to the generation of the send volume. If they match then they are the same directory and we are good to go. If they don't we have to add them to the changed refs list. This means we have to track the generation of the ref we're trying to lookup when we iterate all the refs for a particular inode. So in the case of looking for new refs we have to get the generation from the parent volume, and in the case of looking for deleted refs we have to get the generation from the send volume to compare with. There was also the issue of using a ulist to keep track of the directories we needed to check. Because we can get a deleted ref and a new ref for the same inode number the ulist won't work since it indexes based on the value. So instead just dup any directory ref we find and add it to a local list, and then process that list as normal and do away with using a ulist for this altogether. Before we would fail all of the tests in the far-progs that related to moving directories (test group 32). With this patch we now pass these tests, and all of the tests in the far-progs send testing suite. Thanks, Signed-off-by: Josef Bacik <jbacik@fusionio.com> Signed-off-by: Chris Mason <chris.mason@fusionio.com>
2013-08-16 16:52:55 -04:00
Btrfs: cleanup unused arguments in send.c sctx is removed from the argument of the function that doesn't use sctx. Signed-off-by: Tsutomu Itoh <t-itoh@jp.fujitsu.com> Signed-off-by: Josef Bacik <jbacik@fusionio.com>
2013-05-08 07:51:52 +00:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: code cleanups for send/receive Doing some code cleanups as suggested by Arne. Changes do not change any logic. Signed-off-by: Alexander Block <ablock84@googlemail.com>
2012-07-28 16:33:49 +02:00
Btrfs: cleanup unused arguments in send.c sctx is removed from the argument of the function that doesn't use sctx. Signed-off-by: Tsutomu Itoh <t-itoh@jp.fujitsu.com> Signed-off-by: Josef Bacik <jbacik@fusionio.com>
2013-05-08 07:51:52 +00:00
Btrfs: code cleanups for send/receive Doing some code cleanups as suggested by Arne. Changes do not change any logic. Signed-off-by: Alexander Block <ablock84@googlemail.com>
2012-07-28 16:33:49 +02:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: cleanup unused arguments in send.c sctx is removed from the argument of the function that doesn't use sctx. Signed-off-by: Tsutomu Itoh <t-itoh@jp.fujitsu.com> Signed-off-by: Josef Bacik <jbacik@fusionio.com>
2013-05-08 07:51:52 +00:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: add/fix comments/documentation for send/receive As the subject already said, add/fix comments. Signed-off-by: Alexander Block <ablock84@googlemail.com>
2012-07-28 14:11:31 +02:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: cleanup unused arguments in send.c sctx is removed from the argument of the function that doesn't use sctx. Signed-off-by: Tsutomu Itoh <t-itoh@jp.fujitsu.com> Signed-off-by: Josef Bacik <jbacik@fusionio.com>
2013-05-08 07:51:52 +00:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: cleanup unused arguments in send.c sctx is removed from the argument of the function that doesn't use sctx. Signed-off-by: Tsutomu Itoh <t-itoh@jp.fujitsu.com> Signed-off-by: Josef Bacik <jbacik@fusionio.com>
2013-05-08 07:51:52 +00:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: fix send attempting to rmdir non-empty directories The incremental send algorithm assumed that it was possible to issue a directory remove (rmdir) if the the inode number it was currently processing was greater than (or equal) to any inode that referenced the directory's inode. This wasn't a valid assumption because any such inode might be a child directory that is pending a move/rename operation, because it was moved into a directory that has a higher inode number and was moved/renamed too - in other words, the case the following commit addressed: 9f03740a956d7ac6a1b8f8c455da6fa5cae11c22 (Btrfs: fix infinite path build loops in incremental send) This made an incremental send issue an rmdir operation before the target directory was actually empty, which made btrfs receive fail. Therefore it needs to wait for all pending child directory inodes to be moved/renamed before sending an rmdir operation. Simple steps to reproduce this issue: $ mkfs.btrfs -f /dev/sdb3 $ mount /dev/sdb3 /mnt/btrfs $ mkdir -p /mnt/btrfs/a/b/c/x $ mkdir /mnt/btrfs/a/b/y $ btrfs subvolume snapshot -r /mnt/btrfs /mnt/btrfs/snap1 $ btrfs send /mnt/btrfs/snap1 -f /tmp/base.send $ mv /mnt/btrfs/a/b/y /mnt/btrfs/a/b/YY $ mv /mnt/btrfs/a/b/c/x /mnt/btrfs/a/b/YY $ rmdir /mnt/btrfs/a/b/c $ btrfs subvolume snapshot -r /mnt/btrfs /mnt/btrfs/snap2 $ btrfs send -p /mnt/btrfs/snap1 /mnt/btrfs/snap2 -f /tmp/incremental.send $ umount /mnt/btrfs $ mkfs.btrfs -f /dev/sdb3 $ mount /dev/sdb3 /mnt/btrfs $ btrfs receive /mnt/btrfs -f /tmp/base.send $ btrfs receive /mnt/btrfs -f /tmp/incremental.send The second btrfs receive command failed with: ERROR: rmdir o259-6-0 failed. Directory not empty A test case for xfstests follows. Signed-off-by: Filipe David Borba Manana <fdmanana@gmail.com> Signed-off-by: Josef Bacik <jbacik@fb.com>
2014-02-19 14:31:44 +00:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: fix send attempting to rmdir non-empty directories The incremental send algorithm assumed that it was possible to issue a directory remove (rmdir) if the the inode number it was currently processing was greater than (or equal) to any inode that referenced the directory's inode. This wasn't a valid assumption because any such inode might be a child directory that is pending a move/rename operation, because it was moved into a directory that has a higher inode number and was moved/renamed too - in other words, the case the following commit addressed: 9f03740a956d7ac6a1b8f8c455da6fa5cae11c22 (Btrfs: fix infinite path build loops in incremental send) This made an incremental send issue an rmdir operation before the target directory was actually empty, which made btrfs receive fail. Therefore it needs to wait for all pending child directory inodes to be moved/renamed before sending an rmdir operation. Simple steps to reproduce this issue: $ mkfs.btrfs -f /dev/sdb3 $ mount /dev/sdb3 /mnt/btrfs $ mkdir -p /mnt/btrfs/a/b/c/x $ mkdir /mnt/btrfs/a/b/y $ btrfs subvolume snapshot -r /mnt/btrfs /mnt/btrfs/snap1 $ btrfs send /mnt/btrfs/snap1 -f /tmp/base.send $ mv /mnt/btrfs/a/b/y /mnt/btrfs/a/b/YY $ mv /mnt/btrfs/a/b/c/x /mnt/btrfs/a/b/YY $ rmdir /mnt/btrfs/a/b/c $ btrfs subvolume snapshot -r /mnt/btrfs /mnt/btrfs/snap2 $ btrfs send -p /mnt/btrfs/snap1 /mnt/btrfs/snap2 -f /tmp/incremental.send $ umount /mnt/btrfs $ mkfs.btrfs -f /dev/sdb3 $ mount /dev/sdb3 /mnt/btrfs $ btrfs receive /mnt/btrfs -f /tmp/base.send $ btrfs receive /mnt/btrfs -f /tmp/incremental.send The second btrfs receive command failed with: ERROR: rmdir o259-6-0 failed. Directory not empty A test case for xfstests follows. Signed-off-by: Filipe David Borba Manana <fdmanana@gmail.com> Signed-off-by: Josef Bacik <jbacik@fb.com>
2014-02-19 14:31:44 +00:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: don't treat top/root directory inode as deleted/reused We can't do the deleted/reused logic for top/root inodes as it would create a stream that tries to delete and recreate the root dir. Reported-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com> Signed-off-by: Alexander Block <ablock84@googlemail.com>
2012-08-01 14:48:59 +02:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: make some tree searches in send.c more efficient We have this pattern where we do search for a contiguous group of items in a tree and everytime we find an item, we process it, then we release our path, increment the offset of the search key, do another full tree search and repeat these steps until a tree search can't find more items we're interested in. Instead of doing these full tree searches after processing each item, just process the next item/slot in our leaf and don't release the path. Since all these trees are read only and we always use the commit root for a search and skip node/leaf locks, we're not affecting concurrency on the trees. Signed-off-by: Filipe David Borba Manana <fdmanana@gmail.com> Signed-off-by: Josef Bacik <jbacik@fb.com>
2014-02-05 16:48:56 +00:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: fix send attempting to rmdir non-empty directories The incremental send algorithm assumed that it was possible to issue a directory remove (rmdir) if the the inode number it was currently processing was greater than (or equal) to any inode that referenced the directory's inode. This wasn't a valid assumption because any such inode might be a child directory that is pending a move/rename operation, because it was moved into a directory that has a higher inode number and was moved/renamed too - in other words, the case the following commit addressed: 9f03740a956d7ac6a1b8f8c455da6fa5cae11c22 (Btrfs: fix infinite path build loops in incremental send) This made an incremental send issue an rmdir operation before the target directory was actually empty, which made btrfs receive fail. Therefore it needs to wait for all pending child directory inodes to be moved/renamed before sending an rmdir operation. Simple steps to reproduce this issue: $ mkfs.btrfs -f /dev/sdb3 $ mount /dev/sdb3 /mnt/btrfs $ mkdir -p /mnt/btrfs/a/b/c/x $ mkdir /mnt/btrfs/a/b/y $ btrfs subvolume snapshot -r /mnt/btrfs /mnt/btrfs/snap1 $ btrfs send /mnt/btrfs/snap1 -f /tmp/base.send $ mv /mnt/btrfs/a/b/y /mnt/btrfs/a/b/YY $ mv /mnt/btrfs/a/b/c/x /mnt/btrfs/a/b/YY $ rmdir /mnt/btrfs/a/b/c $ btrfs subvolume snapshot -r /mnt/btrfs /mnt/btrfs/snap2 $ btrfs send -p /mnt/btrfs/snap1 /mnt/btrfs/snap2 -f /tmp/incremental.send $ umount /mnt/btrfs $ mkfs.btrfs -f /dev/sdb3 $ mount /dev/sdb3 /mnt/btrfs $ btrfs receive /mnt/btrfs -f /tmp/base.send $ btrfs receive /mnt/btrfs -f /tmp/incremental.send The second btrfs receive command failed with: ERROR: rmdir o259-6-0 failed. Directory not empty A test case for xfstests follows. Signed-off-by: Filipe David Borba Manana <fdmanana@gmail.com> Signed-off-by: Josef Bacik <jbacik@fb.com>
2014-02-19 14:31:44 +00:00
Btrfs: make some tree searches in send.c more efficient We have this pattern where we do search for a contiguous group of items in a tree and everytime we find an item, we process it, then we release our path, increment the offset of the search key, do another full tree search and repeat these steps until a tree search can't find more items we're interested in. Instead of doing these full tree searches after processing each item, just process the next item/slot in our leaf and don't release the path. Since all these trees are read only and we always use the commit root for a search and skip node/leaf locks, we're not affecting concurrency on the trees. Signed-off-by: Filipe David Borba Manana <fdmanana@gmail.com> Signed-off-by: Josef Bacik <jbacik@fb.com>
2014-02-05 16:48:56 +00:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: make some tree searches in send.c more efficient We have this pattern where we do search for a contiguous group of items in a tree and everytime we find an item, we process it, then we release our path, increment the offset of the search key, do another full tree search and repeat these steps until a tree search can't find more items we're interested in. Instead of doing these full tree searches after processing each item, just process the next item/slot in our leaf and don't release the path. Since all these trees are read only and we always use the commit root for a search and skip node/leaf locks, we're not affecting concurrency on the trees. Signed-off-by: Filipe David Borba Manana <fdmanana@gmail.com> Signed-off-by: Josef Bacik <jbacik@fb.com>
2014-02-05 16:48:56 +00:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: fix send attempting to rmdir non-empty directories The incremental send algorithm assumed that it was possible to issue a directory remove (rmdir) if the the inode number it was currently processing was greater than (or equal) to any inode that referenced the directory's inode. This wasn't a valid assumption because any such inode might be a child directory that is pending a move/rename operation, because it was moved into a directory that has a higher inode number and was moved/renamed too - in other words, the case the following commit addressed: 9f03740a956d7ac6a1b8f8c455da6fa5cae11c22 (Btrfs: fix infinite path build loops in incremental send) This made an incremental send issue an rmdir operation before the target directory was actually empty, which made btrfs receive fail. Therefore it needs to wait for all pending child directory inodes to be moved/renamed before sending an rmdir operation. Simple steps to reproduce this issue: $ mkfs.btrfs -f /dev/sdb3 $ mount /dev/sdb3 /mnt/btrfs $ mkdir -p /mnt/btrfs/a/b/c/x $ mkdir /mnt/btrfs/a/b/y $ btrfs subvolume snapshot -r /mnt/btrfs /mnt/btrfs/snap1 $ btrfs send /mnt/btrfs/snap1 -f /tmp/base.send $ mv /mnt/btrfs/a/b/y /mnt/btrfs/a/b/YY $ mv /mnt/btrfs/a/b/c/x /mnt/btrfs/a/b/YY $ rmdir /mnt/btrfs/a/b/c $ btrfs subvolume snapshot -r /mnt/btrfs /mnt/btrfs/snap2 $ btrfs send -p /mnt/btrfs/snap1 /mnt/btrfs/snap2 -f /tmp/incremental.send $ umount /mnt/btrfs $ mkfs.btrfs -f /dev/sdb3 $ mount /dev/sdb3 /mnt/btrfs $ btrfs receive /mnt/btrfs -f /tmp/base.send $ btrfs receive /mnt/btrfs -f /tmp/incremental.send The second btrfs receive command failed with: ERROR: rmdir o259-6-0 failed. Directory not empty A test case for xfstests follows. Signed-off-by: Filipe David Borba Manana <fdmanana@gmail.com> Signed-off-by: Josef Bacik <jbacik@fb.com>
2014-02-19 14:31:44 +00:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: make some tree searches in send.c more efficient We have this pattern where we do search for a contiguous group of items in a tree and everytime we find an item, we process it, then we release our path, increment the offset of the search key, do another full tree search and repeat these steps until a tree search can't find more items we're interested in. Instead of doing these full tree searches after processing each item, just process the next item/slot in our leaf and don't release the path. Since all these trees are read only and we always use the commit root for a search and skip node/leaf locks, we're not affecting concurrency on the trees. Signed-off-by: Filipe David Borba Manana <fdmanana@gmail.com> Signed-off-by: Josef Bacik <jbacik@fb.com>
2014-02-05 16:48:56 +00:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: fix infinite path build loops in incremental send The send operation processes inodes by their ascending number, and assumes that any rename/move operation can be successfully performed (sent to the caller) once all previous inodes (those with a smaller inode number than the one we're currently processing) were processed. This is not true when an incremental send had to process an hierarchical change between 2 snapshots where the parent-children relationship between directory inodes was reversed - that is, parents became children and children became parents. This situation made the path building code go into an infinite loop, which kept allocating more and more memory that eventually lead to a krealloc warning being displayed in dmesg: WARNING: CPU: 1 PID: 5705 at mm/page_alloc.c:2477 __alloc_pages_nodemask+0x365/0xad0() Modules linked in: btrfs raid6_pq xor pci_stub vboxpci(O) vboxnetadp(O) vboxnetflt(O) vboxdrv(O) snd_hda_codec_hdmi snd_hda_codec_realtek joydev radeon snd_hda_intel snd_hda_codec snd_hwdep snd_seq_midi snd_pcm psmouse i915 snd_rawmidi serio_raw snd_seq_midi_event lpc_ich snd_seq snd_timer ttm snd_seq_device rfcomm drm_kms_helper parport_pc bnep bluetooth drm ppdev snd soundcore i2c_algo_bit snd_page_alloc binfmt_misc video lp parport r8169 mii hid_generic usbhid hid CPU: 1 PID: 5705 Comm: btrfs Tainted: G O 3.13.0-rc7-fdm-btrfs-next-18+ #3 Hardware name: To Be Filled By O.E.M. To Be Filled By O.E.M./Z77 Pro4, BIOS P1.50 09/04/2012 [ 5381.660441] 00000000000009ad ffff8806f6f2f4e8 ffffffff81777434 0000000000000007 [ 5381.660447] 0000000000000000 ffff8806f6f2f528 ffffffff8104a9ec ffff8807038f36f0 [ 5381.660452] 0000000000000000 0000000000000206 ffff8807038f2490 ffff8807038f36f0 [ 5381.660457] Call Trace: [ 5381.660464] [<ffffffff81777434>] dump_stack+0x4e/0x68 [ 5381.660471] [<ffffffff8104a9ec>] warn_slowpath_common+0x8c/0xc0 [ 5381.660476] [<ffffffff8104aa3a>] warn_slowpath_null+0x1a/0x20 [ 5381.660480] [<ffffffff81144995>] __alloc_pages_nodemask+0x365/0xad0 [ 5381.660487] [<ffffffff8108313f>] ? local_clock+0x4f/0x60 [ 5381.660491] [<ffffffff811430e8>] ? free_one_page+0x98/0x440 [ 5381.660495] [<ffffffff8108313f>] ? local_clock+0x4f/0x60 [ 5381.660502] [<ffffffff8113fae4>] ? __get_free_pages+0x14/0x50 [ 5381.660508] [<ffffffff81095fb8>] ? trace_hardirqs_off_caller+0x28/0xd0 [ 5381.660515] [<ffffffff81183caf>] alloc_pages_current+0x10f/0x1f0 [ 5381.660520] [<ffffffff8113fae4>] ? __get_free_pages+0x14/0x50 [ 5381.660524] [<ffffffff8113fae4>] __get_free_pages+0x14/0x50 [ 5381.660530] [<ffffffff8115dace>] kmalloc_order_trace+0x3e/0x100 [ 5381.660536] [<ffffffff81191ea0>] __kmalloc_track_caller+0x220/0x230 [ 5381.660560] [<ffffffffa0729fdb>] ? fs_path_ensure_buf.part.12+0x6b/0x200 [btrfs] [ 5381.660564] [<ffffffff8178085c>] ? retint_restore_args+0xe/0xe [ 5381.660569] [<ffffffff811580ef>] krealloc+0x6f/0xb0 [ 5381.660586] [<ffffffffa0729fdb>] fs_path_ensure_buf.part.12+0x6b/0x200 [btrfs] [ 5381.660601] [<ffffffffa072a208>] fs_path_prepare_for_add+0x98/0xb0 [btrfs] [ 5381.660615] [<ffffffffa072a2bc>] fs_path_add_path+0x2c/0x60 [btrfs] [ 5381.660628] [<ffffffffa072c55c>] get_cur_path+0x7c/0x1c0 [btrfs] Even without this loop, the incremental send couldn't succeed, because it would attempt to send a rename/move operation for the lower inode before the highest inode number was renamed/move. This issue is easy to trigger with the following steps: $ mkfs.btrfs -f /dev/sdb3 $ mount /dev/sdb3 /mnt/btrfs $ mkdir -p /mnt/btrfs/a/b/c/d $ mkdir /mnt/btrfs/a/b/c2 $ btrfs subvol snapshot -r /mnt/btrfs /mnt/btrfs/snap1 $ mv /mnt/btrfs/a/b/c/d /mnt/btrfs/a/b/c2/d2 $ mv /mnt/btrfs/a/b/c /mnt/btrfs/a/b/c2/d2/cc $ btrfs subvol snapshot -r /mnt/btrfs /mnt/btrfs/snap2 $ btrfs send -p /mnt/btrfs/snap1 /mnt/btrfs/snap2 > /tmp/incremental.send The structure of the filesystem when the first snapshot is taken is: . (ino 256) |-- a (ino 257) |-- b (ino 258) |-- c (ino 259) | |-- d (ino 260) | |-- c2 (ino 261) And its structure when the second snapshot is taken is: . (ino 256) |-- a (ino 257) |-- b (ino 258) |-- c2 (ino 261) |-- d2 (ino 260) |-- cc (ino 259) Before the move/rename operation is performed for the inode 259, the move/rename for inode 260 must be performed, since 259 is now a child of 260. A test case for xfstests, with a more complex scenario, will follow soon. Signed-off-by: Filipe David Borba Manana <fdmanana@gmail.com> Signed-off-by: Josef Bacik <jbacik@fb.com> Signed-off-by: Chris Mason <clm@fb.com>
2014-01-22 10:00:53 +00:00
Btrfs: fix send attempting to rmdir non-empty directories The incremental send algorithm assumed that it was possible to issue a directory remove (rmdir) if the the inode number it was currently processing was greater than (or equal) to any inode that referenced the directory's inode. This wasn't a valid assumption because any such inode might be a child directory that is pending a move/rename operation, because it was moved into a directory that has a higher inode number and was moved/renamed too - in other words, the case the following commit addressed: 9f03740a956d7ac6a1b8f8c455da6fa5cae11c22 (Btrfs: fix infinite path build loops in incremental send) This made an incremental send issue an rmdir operation before the target directory was actually empty, which made btrfs receive fail. Therefore it needs to wait for all pending child directory inodes to be moved/renamed before sending an rmdir operation. Simple steps to reproduce this issue: $ mkfs.btrfs -f /dev/sdb3 $ mount /dev/sdb3 /mnt/btrfs $ mkdir -p /mnt/btrfs/a/b/c/x $ mkdir /mnt/btrfs/a/b/y $ btrfs subvolume snapshot -r /mnt/btrfs /mnt/btrfs/snap1 $ btrfs send /mnt/btrfs/snap1 -f /tmp/base.send $ mv /mnt/btrfs/a/b/y /mnt/btrfs/a/b/YY $ mv /mnt/btrfs/a/b/c/x /mnt/btrfs/a/b/YY $ rmdir /mnt/btrfs/a/b/c $ btrfs subvolume snapshot -r /mnt/btrfs /mnt/btrfs/snap2 $ btrfs send -p /mnt/btrfs/snap1 /mnt/btrfs/snap2 -f /tmp/incremental.send $ umount /mnt/btrfs $ mkfs.btrfs -f /dev/sdb3 $ mount /dev/sdb3 /mnt/btrfs $ btrfs receive /mnt/btrfs -f /tmp/base.send $ btrfs receive /mnt/btrfs -f /tmp/incremental.send The second btrfs receive command failed with: ERROR: rmdir o259-6-0 failed. Directory not empty A test case for xfstests follows. Signed-off-by: Filipe David Borba Manana <fdmanana@gmail.com> Signed-off-by: Josef Bacik <jbacik@fb.com>
2014-02-19 14:31:44 +00:00
Btrfs: fix infinite path build loops in incremental send The send operation processes inodes by their ascending number, and assumes that any rename/move operation can be successfully performed (sent to the caller) once all previous inodes (those with a smaller inode number than the one we're currently processing) were processed. This is not true when an incremental send had to process an hierarchical change between 2 snapshots where the parent-children relationship between directory inodes was reversed - that is, parents became children and children became parents. This situation made the path building code go into an infinite loop, which kept allocating more and more memory that eventually lead to a krealloc warning being displayed in dmesg: WARNING: CPU: 1 PID: 5705 at mm/page_alloc.c:2477 __alloc_pages_nodemask+0x365/0xad0() Modules linked in: btrfs raid6_pq xor pci_stub vboxpci(O) vboxnetadp(O) vboxnetflt(O) vboxdrv(O) snd_hda_codec_hdmi snd_hda_codec_realtek joydev radeon snd_hda_intel snd_hda_codec snd_hwdep snd_seq_midi snd_pcm psmouse i915 snd_rawmidi serio_raw snd_seq_midi_event lpc_ich snd_seq snd_timer ttm snd_seq_device rfcomm drm_kms_helper parport_pc bnep bluetooth drm ppdev snd soundcore i2c_algo_bit snd_page_alloc binfmt_misc video lp parport r8169 mii hid_generic usbhid hid CPU: 1 PID: 5705 Comm: btrfs Tainted: G O 3.13.0-rc7-fdm-btrfs-next-18+ #3 Hardware name: To Be Filled By O.E.M. To Be Filled By O.E.M./Z77 Pro4, BIOS P1.50 09/04/2012 [ 5381.660441] 00000000000009ad ffff8806f6f2f4e8 ffffffff81777434 0000000000000007 [ 5381.660447] 0000000000000000 ffff8806f6f2f528 ffffffff8104a9ec ffff8807038f36f0 [ 5381.660452] 0000000000000000 0000000000000206 ffff8807038f2490 ffff8807038f36f0 [ 5381.660457] Call Trace: [ 5381.660464] [<ffffffff81777434>] dump_stack+0x4e/0x68 [ 5381.660471] [<ffffffff8104a9ec>] warn_slowpath_common+0x8c/0xc0 [ 5381.660476] [<ffffffff8104aa3a>] warn_slowpath_null+0x1a/0x20 [ 5381.660480] [<ffffffff81144995>] __alloc_pages_nodemask+0x365/0xad0 [ 5381.660487] [<ffffffff8108313f>] ? local_clock+0x4f/0x60 [ 5381.660491] [<ffffffff811430e8>] ? free_one_page+0x98/0x440 [ 5381.660495] [<ffffffff8108313f>] ? local_clock+0x4f/0x60 [ 5381.660502] [<ffffffff8113fae4>] ? __get_free_pages+0x14/0x50 [ 5381.660508] [<ffffffff81095fb8>] ? trace_hardirqs_off_caller+0x28/0xd0 [ 5381.660515] [<ffffffff81183caf>] alloc_pages_current+0x10f/0x1f0 [ 5381.660520] [<ffffffff8113fae4>] ? __get_free_pages+0x14/0x50 [ 5381.660524] [<ffffffff8113fae4>] __get_free_pages+0x14/0x50 [ 5381.660530] [<ffffffff8115dace>] kmalloc_order_trace+0x3e/0x100 [ 5381.660536] [<ffffffff81191ea0>] __kmalloc_track_caller+0x220/0x230 [ 5381.660560] [<ffffffffa0729fdb>] ? fs_path_ensure_buf.part.12+0x6b/0x200 [btrfs] [ 5381.660564] [<ffffffff8178085c>] ? retint_restore_args+0xe/0xe [ 5381.660569] [<ffffffff811580ef>] krealloc+0x6f/0xb0 [ 5381.660586] [<ffffffffa0729fdb>] fs_path_ensure_buf.part.12+0x6b/0x200 [btrfs] [ 5381.660601] [<ffffffffa072a208>] fs_path_prepare_for_add+0x98/0xb0 [btrfs] [ 5381.660615] [<ffffffffa072a2bc>] fs_path_add_path+0x2c/0x60 [btrfs] [ 5381.660628] [<ffffffffa072c55c>] get_cur_path+0x7c/0x1c0 [btrfs] Even without this loop, the incremental send couldn't succeed, because it would attempt to send a rename/move operation for the lower inode before the highest inode number was renamed/move. This issue is easy to trigger with the following steps: $ mkfs.btrfs -f /dev/sdb3 $ mount /dev/sdb3 /mnt/btrfs $ mkdir -p /mnt/btrfs/a/b/c/d $ mkdir /mnt/btrfs/a/b/c2 $ btrfs subvol snapshot -r /mnt/btrfs /mnt/btrfs/snap1 $ mv /mnt/btrfs/a/b/c/d /mnt/btrfs/a/b/c2/d2 $ mv /mnt/btrfs/a/b/c /mnt/btrfs/a/b/c2/d2/cc $ btrfs subvol snapshot -r /mnt/btrfs /mnt/btrfs/snap2 $ btrfs send -p /mnt/btrfs/snap1 /mnt/btrfs/snap2 > /tmp/incremental.send The structure of the filesystem when the first snapshot is taken is: . (ino 256) |-- a (ino 257) |-- b (ino 258) |-- c (ino 259) | |-- d (ino 260) | |-- c2 (ino 261) And its structure when the second snapshot is taken is: . (ino 256) |-- a (ino 257) |-- b (ino 258) |-- c2 (ino 261) |-- d2 (ino 260) |-- cc (ino 259) Before the move/rename operation is performed for the inode 259, the move/rename for inode 260 must be performed, since 259 is now a child of 260. A test case for xfstests, with a more complex scenario, will follow soon. Signed-off-by: Filipe David Borba Manana <fdmanana@gmail.com> Signed-off-by: Josef Bacik <jbacik@fb.com> Signed-off-by: Chris Mason <clm@fb.com>
2014-01-22 10:00:53 +00:00
Btrfs: fix send attempting to rmdir non-empty directories The incremental send algorithm assumed that it was possible to issue a directory remove (rmdir) if the the inode number it was currently processing was greater than (or equal) to any inode that referenced the directory's inode. This wasn't a valid assumption because any such inode might be a child directory that is pending a move/rename operation, because it was moved into a directory that has a higher inode number and was moved/renamed too - in other words, the case the following commit addressed: 9f03740a956d7ac6a1b8f8c455da6fa5cae11c22 (Btrfs: fix infinite path build loops in incremental send) This made an incremental send issue an rmdir operation before the target directory was actually empty, which made btrfs receive fail. Therefore it needs to wait for all pending child directory inodes to be moved/renamed before sending an rmdir operation. Simple steps to reproduce this issue: $ mkfs.btrfs -f /dev/sdb3 $ mount /dev/sdb3 /mnt/btrfs $ mkdir -p /mnt/btrfs/a/b/c/x $ mkdir /mnt/btrfs/a/b/y $ btrfs subvolume snapshot -r /mnt/btrfs /mnt/btrfs/snap1 $ btrfs send /mnt/btrfs/snap1 -f /tmp/base.send $ mv /mnt/btrfs/a/b/y /mnt/btrfs/a/b/YY $ mv /mnt/btrfs/a/b/c/x /mnt/btrfs/a/b/YY $ rmdir /mnt/btrfs/a/b/c $ btrfs subvolume snapshot -r /mnt/btrfs /mnt/btrfs/snap2 $ btrfs send -p /mnt/btrfs/snap1 /mnt/btrfs/snap2 -f /tmp/incremental.send $ umount /mnt/btrfs $ mkfs.btrfs -f /dev/sdb3 $ mount /dev/sdb3 /mnt/btrfs $ btrfs receive /mnt/btrfs -f /tmp/base.send $ btrfs receive /mnt/btrfs -f /tmp/incremental.send The second btrfs receive command failed with: ERROR: rmdir o259-6-0 failed. Directory not empty A test case for xfstests follows. Signed-off-by: Filipe David Borba Manana <fdmanana@gmail.com> Signed-off-by: Josef Bacik <jbacik@fb.com>
2014-02-19 14:31:44 +00:00
Btrfs: fix infinite path build loops in incremental send The send operation processes inodes by their ascending number, and assumes that any rename/move operation can be successfully performed (sent to the caller) once all previous inodes (those with a smaller inode number than the one we're currently processing) were processed. This is not true when an incremental send had to process an hierarchical change between 2 snapshots where the parent-children relationship between directory inodes was reversed - that is, parents became children and children became parents. This situation made the path building code go into an infinite loop, which kept allocating more and more memory that eventually lead to a krealloc warning being displayed in dmesg: WARNING: CPU: 1 PID: 5705 at mm/page_alloc.c:2477 __alloc_pages_nodemask+0x365/0xad0() Modules linked in: btrfs raid6_pq xor pci_stub vboxpci(O) vboxnetadp(O) vboxnetflt(O) vboxdrv(O) snd_hda_codec_hdmi snd_hda_codec_realtek joydev radeon snd_hda_intel snd_hda_codec snd_hwdep snd_seq_midi snd_pcm psmouse i915 snd_rawmidi serio_raw snd_seq_midi_event lpc_ich snd_seq snd_timer ttm snd_seq_device rfcomm drm_kms_helper parport_pc bnep bluetooth drm ppdev snd soundcore i2c_algo_bit snd_page_alloc binfmt_misc video lp parport r8169 mii hid_generic usbhid hid CPU: 1 PID: 5705 Comm: btrfs Tainted: G O 3.13.0-rc7-fdm-btrfs-next-18+ #3 Hardware name: To Be Filled By O.E.M. To Be Filled By O.E.M./Z77 Pro4, BIOS P1.50 09/04/2012 [ 5381.660441] 00000000000009ad ffff8806f6f2f4e8 ffffffff81777434 0000000000000007 [ 5381.660447] 0000000000000000 ffff8806f6f2f528 ffffffff8104a9ec ffff8807038f36f0 [ 5381.660452] 0000000000000000 0000000000000206 ffff8807038f2490 ffff8807038f36f0 [ 5381.660457] Call Trace: [ 5381.660464] [<ffffffff81777434>] dump_stack+0x4e/0x68 [ 5381.660471] [<ffffffff8104a9ec>] warn_slowpath_common+0x8c/0xc0 [ 5381.660476] [<ffffffff8104aa3a>] warn_slowpath_null+0x1a/0x20 [ 5381.660480] [<ffffffff81144995>] __alloc_pages_nodemask+0x365/0xad0 [ 5381.660487] [<ffffffff8108313f>] ? local_clock+0x4f/0x60 [ 5381.660491] [<ffffffff811430e8>] ? free_one_page+0x98/0x440 [ 5381.660495] [<ffffffff8108313f>] ? local_clock+0x4f/0x60 [ 5381.660502] [<ffffffff8113fae4>] ? __get_free_pages+0x14/0x50 [ 5381.660508] [<ffffffff81095fb8>] ? trace_hardirqs_off_caller+0x28/0xd0 [ 5381.660515] [<ffffffff81183caf>] alloc_pages_current+0x10f/0x1f0 [ 5381.660520] [<ffffffff8113fae4>] ? __get_free_pages+0x14/0x50 [ 5381.660524] [<ffffffff8113fae4>] __get_free_pages+0x14/0x50 [ 5381.660530] [<ffffffff8115dace>] kmalloc_order_trace+0x3e/0x100 [ 5381.660536] [<ffffffff81191ea0>] __kmalloc_track_caller+0x220/0x230 [ 5381.660560] [<ffffffffa0729fdb>] ? fs_path_ensure_buf.part.12+0x6b/0x200 [btrfs] [ 5381.660564] [<ffffffff8178085c>] ? retint_restore_args+0xe/0xe [ 5381.660569] [<ffffffff811580ef>] krealloc+0x6f/0xb0 [ 5381.660586] [<ffffffffa0729fdb>] fs_path_ensure_buf.part.12+0x6b/0x200 [btrfs] [ 5381.660601] [<ffffffffa072a208>] fs_path_prepare_for_add+0x98/0xb0 [btrfs] [ 5381.660615] [<ffffffffa072a2bc>] fs_path_add_path+0x2c/0x60 [btrfs] [ 5381.660628] [<ffffffffa072c55c>] get_cur_path+0x7c/0x1c0 [btrfs] Even without this loop, the incremental send couldn't succeed, because it would attempt to send a rename/move operation for the lower inode before the highest inode number was renamed/move. This issue is easy to trigger with the following steps: $ mkfs.btrfs -f /dev/sdb3 $ mount /dev/sdb3 /mnt/btrfs $ mkdir -p /mnt/btrfs/a/b/c/d $ mkdir /mnt/btrfs/a/b/c2 $ btrfs subvol snapshot -r /mnt/btrfs /mnt/btrfs/snap1 $ mv /mnt/btrfs/a/b/c/d /mnt/btrfs/a/b/c2/d2 $ mv /mnt/btrfs/a/b/c /mnt/btrfs/a/b/c2/d2/cc $ btrfs subvol snapshot -r /mnt/btrfs /mnt/btrfs/snap2 $ btrfs send -p /mnt/btrfs/snap1 /mnt/btrfs/snap2 > /tmp/incremental.send The structure of the filesystem when the first snapshot is taken is: . (ino 256) |-- a (ino 257) |-- b (ino 258) |-- c (ino 259) | |-- d (ino 260) | |-- c2 (ino 261) And its structure when the second snapshot is taken is: . (ino 256) |-- a (ino 257) |-- b (ino 258) |-- c2 (ino 261) |-- d2 (ino 260) |-- cc (ino 259) Before the move/rename operation is performed for the inode 259, the move/rename for inode 260 must be performed, since 259 is now a child of 260. A test case for xfstests, with a more complex scenario, will follow soon. Signed-off-by: Filipe David Borba Manana <fdmanana@gmail.com> Signed-off-by: Josef Bacik <jbacik@fb.com> Signed-off-by: Chris Mason <clm@fb.com>
2014-01-22 10:00:53 +00:00
Btrfs: incremental send, check if orphanized dir inode needs delayed rename If a directory inode is orphanized, because some inode previously processed has a new name that collides with the old name of the current inode, we need to check if it needs its rename operation delayed too, as its ancestor-descendent relationship with some other inode might have been reversed between the parent and send snapshots and therefore its rename operation needs to happen after that other inode is renamed. For example, for the following reproducer where this is needed (provided by Robbie Ko): $ mkfs.btrfs -f /dev/sdb $ mount /dev/sdb /mnt $ mkfs.btrfs -f /dev/sdc $ mount /dev/sdc /mnt2 $ mkdir -p /mnt/data/n1/n2 $ mkdir /mnt/data/n4 $ mkdir -p /mnt/data/t6/t7 $ mkdir /mnt/data/t5 $ mkdir /mnt/data/t7 $ mkdir /mnt/data/n4/t2 $ mkdir /mnt/data/t4 $ mkdir /mnt/data/t3 $ mv /mnt/data/t7 /mnt/data/n4/t2 $ mv /mnt/data/t4 /mnt/data/n4/t2/t7 $ mv /mnt/data/t5 /mnt/data/n4/t2/t7/t4 $ mv /mnt/data/t6 /mnt/data/n4/t2/t7/t4/t5 $ mv /mnt/data/n1/n2 /mnt/data/n4/t2/t7/t4/t5/t6 $ mv /mnt/data/n1 /mnt/data/n4/t2/t7/t4/t5/t6 $ mv /mnt/data/n4/t2/t7/t4/t5/t6/t7 /mnt/data/n4/t2/t7/t4/t5/t6/n2 $ mv /mnt/data/t3 /mnt/data/n4/t2/t7/t4/t5/t6/n2/t7 $ btrfs subvolume snapshot -r /mnt /mnt/snap1 $ mv /mnt/data/n4/t2/t7/t4/t5/t6/n1 /mnt/data/n4 $ mv /mnt/data/n4/t2 /mnt/data/n4/n1 $ mv /mnt/data/n4/n1/t2/t7/t4/t5/t6/n2 /mnt/data/n4/n1/t2 $ mv /mnt/data/n4/n1/t2/n2/t7/t3 /mnt/data/n4/n1/t2 $ mv /mnt/data/n4/n1/t2/t7/t4/t5/t6 /mnt/data/n4/n1/t2 $ mv /mnt/data/n4/n1/t2/t7/t4 /mnt/data/n4/n1/t2/t6 $ mv /mnt/data/n4/n1/t2/t7 /mnt/data/n4/n1/t2/t3 $ mv /mnt/data/n4/n1/t2/n2/t7 /mnt/data/n4/n1/t2 $ btrfs subvolume snapshot -r /mnt /mnt/snap2 $ btrfs send /mnt/snap1 | btrfs receive /mnt2 $ btrfs send -p /mnt/snap1 /mnt/snap2 | btrfs receive /mnt2 ERROR: send ioctl failed with -12: Cannot allocate memory Where the parent snapshot directory hierarchy is the following: . (ino 256) |-- data/ (ino 257) |-- n4/ (ino 260) |-- t2/ (ino 265) |-- t7/ (ino 264) |-- t4/ (ino 266) |-- t5/ (ino 263) |-- t6/ (ino 261) |-- n1/ (ino 258) |-- n2/ (ino 259) |-- t7/ (ino 262) |-- t3/ (ino 267) And the send snapshot's directory hierarchy is the following: . (ino 256) |-- data/ (ino 257) |-- n4/ (ino 260) |-- n1/ (ino 258) |-- t2/ (ino 265) |-- n2/ (ino 259) |-- t3/ (ino 267) | |-- t7 (ino 264) | |-- t6/ (ino 261) | |-- t4/ (ino 266) | |-- t5/ (ino 263) | |-- t7/ (ino 262) While processing inode 262 we orphanize inode 264 and later attempt to rename inode 264 to its new name/location, which resulted in building an incorrect destination path string for the rename operation with the value "data/n4/t2/t7/t4/t5/t6/n2/t7/t3/t7". This rename operation must have been done only after inode 267 is processed and renamed, as the ancestor-descendent relationship between inodes 264 and 267 was reversed between both snapshots, because otherwise it results in an infinite loop when building the path string for inode 264 when we are processing an inode with a number larger than 264. That loop is the following: start inode 264, send progress of 265 for example parent of 264 -> 267 parent of 267 -> 262 parent of 262 -> 259 parent of 259 -> 261 parent of 261 -> 263 parent of 263 -> 266 parent of 266 -> 264 |--> back to first iteration while current path string length is <= PATH_MAX, and fail with -ENOMEM otherwise So fix this by making the check if we need to delay a directory rename regardless of the current inode having been orphanized or not. A test case for fstests follows soon. Thanks to Robbie Ko for providing a reproducer for this problem. Reported-by: Robbie Ko <robbieko@synology.com> Signed-off-by: Filipe Manana <fdmanana@suse.com>
2015-04-09 14:09:14 +01:00
Btrfs: fix infinite path build loops in incremental send The send operation processes inodes by their ascending number, and assumes that any rename/move operation can be successfully performed (sent to the caller) once all previous inodes (those with a smaller inode number than the one we're currently processing) were processed. This is not true when an incremental send had to process an hierarchical change between 2 snapshots where the parent-children relationship between directory inodes was reversed - that is, parents became children and children became parents. This situation made the path building code go into an infinite loop, which kept allocating more and more memory that eventually lead to a krealloc warning being displayed in dmesg: WARNING: CPU: 1 PID: 5705 at mm/page_alloc.c:2477 __alloc_pages_nodemask+0x365/0xad0() Modules linked in: btrfs raid6_pq xor pci_stub vboxpci(O) vboxnetadp(O) vboxnetflt(O) vboxdrv(O) snd_hda_codec_hdmi snd_hda_codec_realtek joydev radeon snd_hda_intel snd_hda_codec snd_hwdep snd_seq_midi snd_pcm psmouse i915 snd_rawmidi serio_raw snd_seq_midi_event lpc_ich snd_seq snd_timer ttm snd_seq_device rfcomm drm_kms_helper parport_pc bnep bluetooth drm ppdev snd soundcore i2c_algo_bit snd_page_alloc binfmt_misc video lp parport r8169 mii hid_generic usbhid hid CPU: 1 PID: 5705 Comm: btrfs Tainted: G O 3.13.0-rc7-fdm-btrfs-next-18+ #3 Hardware name: To Be Filled By O.E.M. To Be Filled By O.E.M./Z77 Pro4, BIOS P1.50 09/04/2012 [ 5381.660441] 00000000000009ad ffff8806f6f2f4e8 ffffffff81777434 0000000000000007 [ 5381.660447] 0000000000000000 ffff8806f6f2f528 ffffffff8104a9ec ffff8807038f36f0 [ 5381.660452] 0000000000000000 0000000000000206 ffff8807038f2490 ffff8807038f36f0 [ 5381.660457] Call Trace: [ 5381.660464] [<ffffffff81777434>] dump_stack+0x4e/0x68 [ 5381.660471] [<ffffffff8104a9ec>] warn_slowpath_common+0x8c/0xc0 [ 5381.660476] [<ffffffff8104aa3a>] warn_slowpath_null+0x1a/0x20 [ 5381.660480] [<ffffffff81144995>] __alloc_pages_nodemask+0x365/0xad0 [ 5381.660487] [<ffffffff8108313f>] ? local_clock+0x4f/0x60 [ 5381.660491] [<ffffffff811430e8>] ? free_one_page+0x98/0x440 [ 5381.660495] [<ffffffff8108313f>] ? local_clock+0x4f/0x60 [ 5381.660502] [<ffffffff8113fae4>] ? __get_free_pages+0x14/0x50 [ 5381.660508] [<ffffffff81095fb8>] ? trace_hardirqs_off_caller+0x28/0xd0 [ 5381.660515] [<ffffffff81183caf>] alloc_pages_current+0x10f/0x1f0 [ 5381.660520] [<ffffffff8113fae4>] ? __get_free_pages+0x14/0x50 [ 5381.660524] [<ffffffff8113fae4>] __get_free_pages+0x14/0x50 [ 5381.660530] [<ffffffff8115dace>] kmalloc_order_trace+0x3e/0x100 [ 5381.660536] [<ffffffff81191ea0>] __kmalloc_track_caller+0x220/0x230 [ 5381.660560] [<ffffffffa0729fdb>] ? fs_path_ensure_buf.part.12+0x6b/0x200 [btrfs] [ 5381.660564] [<ffffffff8178085c>] ? retint_restore_args+0xe/0xe [ 5381.660569] [<ffffffff811580ef>] krealloc+0x6f/0xb0 [ 5381.660586] [<ffffffffa0729fdb>] fs_path_ensure_buf.part.12+0x6b/0x200 [btrfs] [ 5381.660601] [<ffffffffa072a208>] fs_path_prepare_for_add+0x98/0xb0 [btrfs] [ 5381.660615] [<ffffffffa072a2bc>] fs_path_add_path+0x2c/0x60 [btrfs] [ 5381.660628] [<ffffffffa072c55c>] get_cur_path+0x7c/0x1c0 [btrfs] Even without this loop, the incremental send couldn't succeed, because it would attempt to send a rename/move operation for the lower inode before the highest inode number was renamed/move. This issue is easy to trigger with the following steps: $ mkfs.btrfs -f /dev/sdb3 $ mount /dev/sdb3 /mnt/btrfs $ mkdir -p /mnt/btrfs/a/b/c/d $ mkdir /mnt/btrfs/a/b/c2 $ btrfs subvol snapshot -r /mnt/btrfs /mnt/btrfs/snap1 $ mv /mnt/btrfs/a/b/c/d /mnt/btrfs/a/b/c2/d2 $ mv /mnt/btrfs/a/b/c /mnt/btrfs/a/b/c2/d2/cc $ btrfs subvol snapshot -r /mnt/btrfs /mnt/btrfs/snap2 $ btrfs send -p /mnt/btrfs/snap1 /mnt/btrfs/snap2 > /tmp/incremental.send The structure of the filesystem when the first snapshot is taken is: . (ino 256) |-- a (ino 257) |-- b (ino 258) |-- c (ino 259) | |-- d (ino 260) | |-- c2 (ino 261) And its structure when the second snapshot is taken is: . (ino 256) |-- a (ino 257) |-- b (ino 258) |-- c2 (ino 261) |-- d2 (ino 260) |-- cc (ino 259) Before the move/rename operation is performed for the inode 259, the move/rename for inode 260 must be performed, since 259 is now a child of 260. A test case for xfstests, with a more complex scenario, will follow soon. Signed-off-by: Filipe David Borba Manana <fdmanana@gmail.com> Signed-off-by: Josef Bacik <jbacik@fb.com> Signed-off-by: Chris Mason <clm@fb.com>
2014-01-22 10:00:53 +00:00
Btrfs: fix send attempting to rmdir non-empty directories The incremental send algorithm assumed that it was possible to issue a directory remove (rmdir) if the the inode number it was currently processing was greater than (or equal) to any inode that referenced the directory's inode. This wasn't a valid assumption because any such inode might be a child directory that is pending a move/rename operation, because it was moved into a directory that has a higher inode number and was moved/renamed too - in other words, the case the following commit addressed: 9f03740a956d7ac6a1b8f8c455da6fa5cae11c22 (Btrfs: fix infinite path build loops in incremental send) This made an incremental send issue an rmdir operation before the target directory was actually empty, which made btrfs receive fail. Therefore it needs to wait for all pending child directory inodes to be moved/renamed before sending an rmdir operation. Simple steps to reproduce this issue: $ mkfs.btrfs -f /dev/sdb3 $ mount /dev/sdb3 /mnt/btrfs $ mkdir -p /mnt/btrfs/a/b/c/x $ mkdir /mnt/btrfs/a/b/y $ btrfs subvolume snapshot -r /mnt/btrfs /mnt/btrfs/snap1 $ btrfs send /mnt/btrfs/snap1 -f /tmp/base.send $ mv /mnt/btrfs/a/b/y /mnt/btrfs/a/b/YY $ mv /mnt/btrfs/a/b/c/x /mnt/btrfs/a/b/YY $ rmdir /mnt/btrfs/a/b/c $ btrfs subvolume snapshot -r /mnt/btrfs /mnt/btrfs/snap2 $ btrfs send -p /mnt/btrfs/snap1 /mnt/btrfs/snap2 -f /tmp/incremental.send $ umount /mnt/btrfs $ mkfs.btrfs -f /dev/sdb3 $ mount /dev/sdb3 /mnt/btrfs $ btrfs receive /mnt/btrfs -f /tmp/base.send $ btrfs receive /mnt/btrfs -f /tmp/incremental.send The second btrfs receive command failed with: ERROR: rmdir o259-6-0 failed. Directory not empty A test case for xfstests follows. Signed-off-by: Filipe David Borba Manana <fdmanana@gmail.com> Signed-off-by: Josef Bacik <jbacik@fb.com>
2014-02-19 14:31:44 +00:00
Btrfs: incremental send, check if orphanized dir inode needs delayed rename If a directory inode is orphanized, because some inode previously processed has a new name that collides with the old name of the current inode, we need to check if it needs its rename operation delayed too, as its ancestor-descendent relationship with some other inode might have been reversed between the parent and send snapshots and therefore its rename operation needs to happen after that other inode is renamed. For example, for the following reproducer where this is needed (provided by Robbie Ko): $ mkfs.btrfs -f /dev/sdb $ mount /dev/sdb /mnt $ mkfs.btrfs -f /dev/sdc $ mount /dev/sdc /mnt2 $ mkdir -p /mnt/data/n1/n2 $ mkdir /mnt/data/n4 $ mkdir -p /mnt/data/t6/t7 $ mkdir /mnt/data/t5 $ mkdir /mnt/data/t7 $ mkdir /mnt/data/n4/t2 $ mkdir /mnt/data/t4 $ mkdir /mnt/data/t3 $ mv /mnt/data/t7 /mnt/data/n4/t2 $ mv /mnt/data/t4 /mnt/data/n4/t2/t7 $ mv /mnt/data/t5 /mnt/data/n4/t2/t7/t4 $ mv /mnt/data/t6 /mnt/data/n4/t2/t7/t4/t5 $ mv /mnt/data/n1/n2 /mnt/data/n4/t2/t7/t4/t5/t6 $ mv /mnt/data/n1 /mnt/data/n4/t2/t7/t4/t5/t6 $ mv /mnt/data/n4/t2/t7/t4/t5/t6/t7 /mnt/data/n4/t2/t7/t4/t5/t6/n2 $ mv /mnt/data/t3 /mnt/data/n4/t2/t7/t4/t5/t6/n2/t7 $ btrfs subvolume snapshot -r /mnt /mnt/snap1 $ mv /mnt/data/n4/t2/t7/t4/t5/t6/n1 /mnt/data/n4 $ mv /mnt/data/n4/t2 /mnt/data/n4/n1 $ mv /mnt/data/n4/n1/t2/t7/t4/t5/t6/n2 /mnt/data/n4/n1/t2 $ mv /mnt/data/n4/n1/t2/n2/t7/t3 /mnt/data/n4/n1/t2 $ mv /mnt/data/n4/n1/t2/t7/t4/t5/t6 /mnt/data/n4/n1/t2 $ mv /mnt/data/n4/n1/t2/t7/t4 /mnt/data/n4/n1/t2/t6 $ mv /mnt/data/n4/n1/t2/t7 /mnt/data/n4/n1/t2/t3 $ mv /mnt/data/n4/n1/t2/n2/t7 /mnt/data/n4/n1/t2 $ btrfs subvolume snapshot -r /mnt /mnt/snap2 $ btrfs send /mnt/snap1 | btrfs receive /mnt2 $ btrfs send -p /mnt/snap1 /mnt/snap2 | btrfs receive /mnt2 ERROR: send ioctl failed with -12: Cannot allocate memory Where the parent snapshot directory hierarchy is the following: . (ino 256) |-- data/ (ino 257) |-- n4/ (ino 260) |-- t2/ (ino 265) |-- t7/ (ino 264) |-- t4/ (ino 266) |-- t5/ (ino 263) |-- t6/ (ino 261) |-- n1/ (ino 258) |-- n2/ (ino 259) |-- t7/ (ino 262) |-- t3/ (ino 267) And the send snapshot's directory hierarchy is the following: . (ino 256) |-- data/ (ino 257) |-- n4/ (ino 260) |-- n1/ (ino 258) |-- t2/ (ino 265) |-- n2/ (ino 259) |-- t3/ (ino 267) | |-- t7 (ino 264) | |-- t6/ (ino 261) | |-- t4/ (ino 266) | |-- t5/ (ino 263) | |-- t7/ (ino 262) While processing inode 262 we orphanize inode 264 and later attempt to rename inode 264 to its new name/location, which resulted in building an incorrect destination path string for the rename operation with the value "data/n4/t2/t7/t4/t5/t6/n2/t7/t3/t7". This rename operation must have been done only after inode 267 is processed and renamed, as the ancestor-descendent relationship between inodes 264 and 267 was reversed between both snapshots, because otherwise it results in an infinite loop when building the path string for inode 264 when we are processing an inode with a number larger than 264. That loop is the following: start inode 264, send progress of 265 for example parent of 264 -> 267 parent of 267 -> 262 parent of 262 -> 259 parent of 259 -> 261 parent of 261 -> 263 parent of 263 -> 266 parent of 266 -> 264 |--> back to first iteration while current path string length is <= PATH_MAX, and fail with -ENOMEM otherwise So fix this by making the check if we need to delay a directory rename regardless of the current inode having been orphanized or not. A test case for fstests follows soon. Thanks to Robbie Ko for providing a reproducer for this problem. Reported-by: Robbie Ko <robbieko@synology.com> Signed-off-by: Filipe Manana <fdmanana@suse.com>
2015-04-09 14:09:14 +01:00
Btrfs: fix infinite path build loops in incremental send The send operation processes inodes by their ascending number, and assumes that any rename/move operation can be successfully performed (sent to the caller) once all previous inodes (those with a smaller inode number than the one we're currently processing) were processed. This is not true when an incremental send had to process an hierarchical change between 2 snapshots where the parent-children relationship between directory inodes was reversed - that is, parents became children and children became parents. This situation made the path building code go into an infinite loop, which kept allocating more and more memory that eventually lead to a krealloc warning being displayed in dmesg: WARNING: CPU: 1 PID: 5705 at mm/page_alloc.c:2477 __alloc_pages_nodemask+0x365/0xad0() Modules linked in: btrfs raid6_pq xor pci_stub vboxpci(O) vboxnetadp(O) vboxnetflt(O) vboxdrv(O) snd_hda_codec_hdmi snd_hda_codec_realtek joydev radeon snd_hda_intel snd_hda_codec snd_hwdep snd_seq_midi snd_pcm psmouse i915 snd_rawmidi serio_raw snd_seq_midi_event lpc_ich snd_seq snd_timer ttm snd_seq_device rfcomm drm_kms_helper parport_pc bnep bluetooth drm ppdev snd soundcore i2c_algo_bit snd_page_alloc binfmt_misc video lp parport r8169 mii hid_generic usbhid hid CPU: 1 PID: 5705 Comm: btrfs Tainted: G O 3.13.0-rc7-fdm-btrfs-next-18+ #3 Hardware name: To Be Filled By O.E.M. To Be Filled By O.E.M./Z77 Pro4, BIOS P1.50 09/04/2012 [ 5381.660441] 00000000000009ad ffff8806f6f2f4e8 ffffffff81777434 0000000000000007 [ 5381.660447] 0000000000000000 ffff8806f6f2f528 ffffffff8104a9ec ffff8807038f36f0 [ 5381.660452] 0000000000000000 0000000000000206 ffff8807038f2490 ffff8807038f36f0 [ 5381.660457] Call Trace: [ 5381.660464] [<ffffffff81777434>] dump_stack+0x4e/0x68 [ 5381.660471] [<ffffffff8104a9ec>] warn_slowpath_common+0x8c/0xc0 [ 5381.660476] [<ffffffff8104aa3a>] warn_slowpath_null+0x1a/0x20 [ 5381.660480] [<ffffffff81144995>] __alloc_pages_nodemask+0x365/0xad0 [ 5381.660487] [<ffffffff8108313f>] ? local_clock+0x4f/0x60 [ 5381.660491] [<ffffffff811430e8>] ? free_one_page+0x98/0x440 [ 5381.660495] [<ffffffff8108313f>] ? local_clock+0x4f/0x60 [ 5381.660502] [<ffffffff8113fae4>] ? __get_free_pages+0x14/0x50 [ 5381.660508] [<ffffffff81095fb8>] ? trace_hardirqs_off_caller+0x28/0xd0 [ 5381.660515] [<ffffffff81183caf>] alloc_pages_current+0x10f/0x1f0 [ 5381.660520] [<ffffffff8113fae4>] ? __get_free_pages+0x14/0x50 [ 5381.660524] [<ffffffff8113fae4>] __get_free_pages+0x14/0x50 [ 5381.660530] [<ffffffff8115dace>] kmalloc_order_trace+0x3e/0x100 [ 5381.660536] [<ffffffff81191ea0>] __kmalloc_track_caller+0x220/0x230 [ 5381.660560] [<ffffffffa0729fdb>] ? fs_path_ensure_buf.part.12+0x6b/0x200 [btrfs] [ 5381.660564] [<ffffffff8178085c>] ? retint_restore_args+0xe/0xe [ 5381.660569] [<ffffffff811580ef>] krealloc+0x6f/0xb0 [ 5381.660586] [<ffffffffa0729fdb>] fs_path_ensure_buf.part.12+0x6b/0x200 [btrfs] [ 5381.660601] [<ffffffffa072a208>] fs_path_prepare_for_add+0x98/0xb0 [btrfs] [ 5381.660615] [<ffffffffa072a2bc>] fs_path_add_path+0x2c/0x60 [btrfs] [ 5381.660628] [<ffffffffa072c55c>] get_cur_path+0x7c/0x1c0 [btrfs] Even without this loop, the incremental send couldn't succeed, because it would attempt to send a rename/move operation for the lower inode before the highest inode number was renamed/move. This issue is easy to trigger with the following steps: $ mkfs.btrfs -f /dev/sdb3 $ mount /dev/sdb3 /mnt/btrfs $ mkdir -p /mnt/btrfs/a/b/c/d $ mkdir /mnt/btrfs/a/b/c2 $ btrfs subvol snapshot -r /mnt/btrfs /mnt/btrfs/snap1 $ mv /mnt/btrfs/a/b/c/d /mnt/btrfs/a/b/c2/d2 $ mv /mnt/btrfs/a/b/c /mnt/btrfs/a/b/c2/d2/cc $ btrfs subvol snapshot -r /mnt/btrfs /mnt/btrfs/snap2 $ btrfs send -p /mnt/btrfs/snap1 /mnt/btrfs/snap2 > /tmp/incremental.send The structure of the filesystem when the first snapshot is taken is: . (ino 256) |-- a (ino 257) |-- b (ino 258) |-- c (ino 259) | |-- d (ino 260) | |-- c2 (ino 261) And its structure when the second snapshot is taken is: . (ino 256) |-- a (ino 257) |-- b (ino 258) |-- c2 (ino 261) |-- d2 (ino 260) |-- cc (ino 259) Before the move/rename operation is performed for the inode 259, the move/rename for inode 260 must be performed, since 259 is now a child of 260. A test case for xfstests, with a more complex scenario, will follow soon. Signed-off-by: Filipe David Borba Manana <fdmanana@gmail.com> Signed-off-by: Josef Bacik <jbacik@fb.com> Signed-off-by: Chris Mason <clm@fb.com>
2014-01-22 10:00:53 +00:00
Btrfs: fix send attempting to rmdir non-empty directories The incremental send algorithm assumed that it was possible to issue a directory remove (rmdir) if the the inode number it was currently processing was greater than (or equal) to any inode that referenced the directory's inode. This wasn't a valid assumption because any such inode might be a child directory that is pending a move/rename operation, because it was moved into a directory that has a higher inode number and was moved/renamed too - in other words, the case the following commit addressed: 9f03740a956d7ac6a1b8f8c455da6fa5cae11c22 (Btrfs: fix infinite path build loops in incremental send) This made an incremental send issue an rmdir operation before the target directory was actually empty, which made btrfs receive fail. Therefore it needs to wait for all pending child directory inodes to be moved/renamed before sending an rmdir operation. Simple steps to reproduce this issue: $ mkfs.btrfs -f /dev/sdb3 $ mount /dev/sdb3 /mnt/btrfs $ mkdir -p /mnt/btrfs/a/b/c/x $ mkdir /mnt/btrfs/a/b/y $ btrfs subvolume snapshot -r /mnt/btrfs /mnt/btrfs/snap1 $ btrfs send /mnt/btrfs/snap1 -f /tmp/base.send $ mv /mnt/btrfs/a/b/y /mnt/btrfs/a/b/YY $ mv /mnt/btrfs/a/b/c/x /mnt/btrfs/a/b/YY $ rmdir /mnt/btrfs/a/b/c $ btrfs subvolume snapshot -r /mnt/btrfs /mnt/btrfs/snap2 $ btrfs send -p /mnt/btrfs/snap1 /mnt/btrfs/snap2 -f /tmp/incremental.send $ umount /mnt/btrfs $ mkfs.btrfs -f /dev/sdb3 $ mount /dev/sdb3 /mnt/btrfs $ btrfs receive /mnt/btrfs -f /tmp/base.send $ btrfs receive /mnt/btrfs -f /tmp/incremental.send The second btrfs receive command failed with: ERROR: rmdir o259-6-0 failed. Directory not empty A test case for xfstests follows. Signed-off-by: Filipe David Borba Manana <fdmanana@gmail.com> Signed-off-by: Josef Bacik <jbacik@fb.com>
2014-02-19 14:31:44 +00:00
Btrfs: fix infinite path build loops in incremental send The send operation processes inodes by their ascending number, and assumes that any rename/move operation can be successfully performed (sent to the caller) once all previous inodes (those with a smaller inode number than the one we're currently processing) were processed. This is not true when an incremental send had to process an hierarchical change between 2 snapshots where the parent-children relationship between directory inodes was reversed - that is, parents became children and children became parents. This situation made the path building code go into an infinite loop, which kept allocating more and more memory that eventually lead to a krealloc warning being displayed in dmesg: WARNING: CPU: 1 PID: 5705 at mm/page_alloc.c:2477 __alloc_pages_nodemask+0x365/0xad0() Modules linked in: btrfs raid6_pq xor pci_stub vboxpci(O) vboxnetadp(O) vboxnetflt(O) vboxdrv(O) snd_hda_codec_hdmi snd_hda_codec_realtek joydev radeon snd_hda_intel snd_hda_codec snd_hwdep snd_seq_midi snd_pcm psmouse i915 snd_rawmidi serio_raw snd_seq_midi_event lpc_ich snd_seq snd_timer ttm snd_seq_device rfcomm drm_kms_helper parport_pc bnep bluetooth drm ppdev snd soundcore i2c_algo_bit snd_page_alloc binfmt_misc video lp parport r8169 mii hid_generic usbhid hid CPU: 1 PID: 5705 Comm: btrfs Tainted: G O 3.13.0-rc7-fdm-btrfs-next-18+ #3 Hardware name: To Be Filled By O.E.M. To Be Filled By O.E.M./Z77 Pro4, BIOS P1.50 09/04/2012 [ 5381.660441] 00000000000009ad ffff8806f6f2f4e8 ffffffff81777434 0000000000000007 [ 5381.660447] 0000000000000000 ffff8806f6f2f528 ffffffff8104a9ec ffff8807038f36f0 [ 5381.660452] 0000000000000000 0000000000000206 ffff8807038f2490 ffff8807038f36f0 [ 5381.660457] Call Trace: [ 5381.660464] [<ffffffff81777434>] dump_stack+0x4e/0x68 [ 5381.660471] [<ffffffff8104a9ec>] warn_slowpath_common+0x8c/0xc0 [ 5381.660476] [<ffffffff8104aa3a>] warn_slowpath_null+0x1a/0x20 [ 5381.660480] [<ffffffff81144995>] __alloc_pages_nodemask+0x365/0xad0 [ 5381.660487] [<ffffffff8108313f>] ? local_clock+0x4f/0x60 [ 5381.660491] [<ffffffff811430e8>] ? free_one_page+0x98/0x440 [ 5381.660495] [<ffffffff8108313f>] ? local_clock+0x4f/0x60 [ 5381.660502] [<ffffffff8113fae4>] ? __get_free_pages+0x14/0x50 [ 5381.660508] [<ffffffff81095fb8>] ? trace_hardirqs_off_caller+0x28/0xd0 [ 5381.660515] [<ffffffff81183caf>] alloc_pages_current+0x10f/0x1f0 [ 5381.660520] [<ffffffff8113fae4>] ? __get_free_pages+0x14/0x50 [ 5381.660524] [<ffffffff8113fae4>] __get_free_pages+0x14/0x50 [ 5381.660530] [<ffffffff8115dace>] kmalloc_order_trace+0x3e/0x100 [ 5381.660536] [<ffffffff81191ea0>] __kmalloc_track_caller+0x220/0x230 [ 5381.660560] [<ffffffffa0729fdb>] ? fs_path_ensure_buf.part.12+0x6b/0x200 [btrfs] [ 5381.660564] [<ffffffff8178085c>] ? retint_restore_args+0xe/0xe [ 5381.660569] [<ffffffff811580ef>] krealloc+0x6f/0xb0 [ 5381.660586] [<ffffffffa0729fdb>] fs_path_ensure_buf.part.12+0x6b/0x200 [btrfs] [ 5381.660601] [<ffffffffa072a208>] fs_path_prepare_for_add+0x98/0xb0 [btrfs] [ 5381.660615] [<ffffffffa072a2bc>] fs_path_add_path+0x2c/0x60 [btrfs] [ 5381.660628] [<ffffffffa072c55c>] get_cur_path+0x7c/0x1c0 [btrfs] Even without this loop, the incremental send couldn't succeed, because it would attempt to send a rename/move operation for the lower inode before the highest inode number was renamed/move. This issue is easy to trigger with the following steps: $ mkfs.btrfs -f /dev/sdb3 $ mount /dev/sdb3 /mnt/btrfs $ mkdir -p /mnt/btrfs/a/b/c/d $ mkdir /mnt/btrfs/a/b/c2 $ btrfs subvol snapshot -r /mnt/btrfs /mnt/btrfs/snap1 $ mv /mnt/btrfs/a/b/c/d /mnt/btrfs/a/b/c2/d2 $ mv /mnt/btrfs/a/b/c /mnt/btrfs/a/b/c2/d2/cc $ btrfs subvol snapshot -r /mnt/btrfs /mnt/btrfs/snap2 $ btrfs send -p /mnt/btrfs/snap1 /mnt/btrfs/snap2 > /tmp/incremental.send The structure of the filesystem when the first snapshot is taken is: . (ino 256) |-- a (ino 257) |-- b (ino 258) |-- c (ino 259) | |-- d (ino 260) | |-- c2 (ino 261) And its structure when the second snapshot is taken is: . (ino 256) |-- a (ino 257) |-- b (ino 258) |-- c2 (ino 261) |-- d2 (ino 260) |-- cc (ino 259) Before the move/rename operation is performed for the inode 259, the move/rename for inode 260 must be performed, since 259 is now a child of 260. A test case for xfstests, with a more complex scenario, will follow soon. Signed-off-by: Filipe David Borba Manana <fdmanana@gmail.com> Signed-off-by: Josef Bacik <jbacik@fb.com> Signed-off-by: Chris Mason <clm@fb.com>
2014-01-22 10:00:53 +00:00
Btrfs: fix send attempting to rmdir non-empty directories The incremental send algorithm assumed that it was possible to issue a directory remove (rmdir) if the the inode number it was currently processing was greater than (or equal) to any inode that referenced the directory's inode. This wasn't a valid assumption because any such inode might be a child directory that is pending a move/rename operation, because it was moved into a directory that has a higher inode number and was moved/renamed too - in other words, the case the following commit addressed: 9f03740a956d7ac6a1b8f8c455da6fa5cae11c22 (Btrfs: fix infinite path build loops in incremental send) This made an incremental send issue an rmdir operation before the target directory was actually empty, which made btrfs receive fail. Therefore it needs to wait for all pending child directory inodes to be moved/renamed before sending an rmdir operation. Simple steps to reproduce this issue: $ mkfs.btrfs -f /dev/sdb3 $ mount /dev/sdb3 /mnt/btrfs $ mkdir -p /mnt/btrfs/a/b/c/x $ mkdir /mnt/btrfs/a/b/y $ btrfs subvolume snapshot -r /mnt/btrfs /mnt/btrfs/snap1 $ btrfs send /mnt/btrfs/snap1 -f /tmp/base.send $ mv /mnt/btrfs/a/b/y /mnt/btrfs/a/b/YY $ mv /mnt/btrfs/a/b/c/x /mnt/btrfs/a/b/YY $ rmdir /mnt/btrfs/a/b/c $ btrfs subvolume snapshot -r /mnt/btrfs /mnt/btrfs/snap2 $ btrfs send -p /mnt/btrfs/snap1 /mnt/btrfs/snap2 -f /tmp/incremental.send $ umount /mnt/btrfs $ mkfs.btrfs -f /dev/sdb3 $ mount /dev/sdb3 /mnt/btrfs $ btrfs receive /mnt/btrfs -f /tmp/base.send $ btrfs receive /mnt/btrfs -f /tmp/incremental.send The second btrfs receive command failed with: ERROR: rmdir o259-6-0 failed. Directory not empty A test case for xfstests follows. Signed-off-by: Filipe David Borba Manana <fdmanana@gmail.com> Signed-off-by: Josef Bacik <jbacik@fb.com>
2014-02-19 14:31:44 +00:00
Btrfs: fix infinite path build loops in incremental send The send operation processes inodes by their ascending number, and assumes that any rename/move operation can be successfully performed (sent to the caller) once all previous inodes (those with a smaller inode number than the one we're currently processing) were processed. This is not true when an incremental send had to process an hierarchical change between 2 snapshots where the parent-children relationship between directory inodes was reversed - that is, parents became children and children became parents. This situation made the path building code go into an infinite loop, which kept allocating more and more memory that eventually lead to a krealloc warning being displayed in dmesg: WARNING: CPU: 1 PID: 5705 at mm/page_alloc.c:2477 __alloc_pages_nodemask+0x365/0xad0() Modules linked in: btrfs raid6_pq xor pci_stub vboxpci(O) vboxnetadp(O) vboxnetflt(O) vboxdrv(O) snd_hda_codec_hdmi snd_hda_codec_realtek joydev radeon snd_hda_intel snd_hda_codec snd_hwdep snd_seq_midi snd_pcm psmouse i915 snd_rawmidi serio_raw snd_seq_midi_event lpc_ich snd_seq snd_timer ttm snd_seq_device rfcomm drm_kms_helper parport_pc bnep bluetooth drm ppdev snd soundcore i2c_algo_bit snd_page_alloc binfmt_misc video lp parport r8169 mii hid_generic usbhid hid CPU: 1 PID: 5705 Comm: btrfs Tainted: G O 3.13.0-rc7-fdm-btrfs-next-18+ #3 Hardware name: To Be Filled By O.E.M. To Be Filled By O.E.M./Z77 Pro4, BIOS P1.50 09/04/2012 [ 5381.660441] 00000000000009ad ffff8806f6f2f4e8 ffffffff81777434 0000000000000007 [ 5381.660447] 0000000000000000 ffff8806f6f2f528 ffffffff8104a9ec ffff8807038f36f0 [ 5381.660452] 0000000000000000 0000000000000206 ffff8807038f2490 ffff8807038f36f0 [ 5381.660457] Call Trace: [ 5381.660464] [<ffffffff81777434>] dump_stack+0x4e/0x68 [ 5381.660471] [<ffffffff8104a9ec>] warn_slowpath_common+0x8c/0xc0 [ 5381.660476] [<ffffffff8104aa3a>] warn_slowpath_null+0x1a/0x20 [ 5381.660480] [<ffffffff81144995>] __alloc_pages_nodemask+0x365/0xad0 [ 5381.660487] [<ffffffff8108313f>] ? local_clock+0x4f/0x60 [ 5381.660491] [<ffffffff811430e8>] ? free_one_page+0x98/0x440 [ 5381.660495] [<ffffffff8108313f>] ? local_clock+0x4f/0x60 [ 5381.660502] [<ffffffff8113fae4>] ? __get_free_pages+0x14/0x50 [ 5381.660508] [<ffffffff81095fb8>] ? trace_hardirqs_off_caller+0x28/0xd0 [ 5381.660515] [<ffffffff81183caf>] alloc_pages_current+0x10f/0x1f0 [ 5381.660520] [<ffffffff8113fae4>] ? __get_free_pages+0x14/0x50 [ 5381.660524] [<ffffffff8113fae4>] __get_free_pages+0x14/0x50 [ 5381.660530] [<ffffffff8115dace>] kmalloc_order_trace+0x3e/0x100 [ 5381.660536] [<ffffffff81191ea0>] __kmalloc_track_caller+0x220/0x230 [ 5381.660560] [<ffffffffa0729fdb>] ? fs_path_ensure_buf.part.12+0x6b/0x200 [btrfs] [ 5381.660564] [<ffffffff8178085c>] ? retint_restore_args+0xe/0xe [ 5381.660569] [<ffffffff811580ef>] krealloc+0x6f/0xb0 [ 5381.660586] [<ffffffffa0729fdb>] fs_path_ensure_buf.part.12+0x6b/0x200 [btrfs] [ 5381.660601] [<ffffffffa072a208>] fs_path_prepare_for_add+0x98/0xb0 [btrfs] [ 5381.660615] [<ffffffffa072a2bc>] fs_path_add_path+0x2c/0x60 [btrfs] [ 5381.660628] [<ffffffffa072c55c>] get_cur_path+0x7c/0x1c0 [btrfs] Even without this loop, the incremental send couldn't succeed, because it would attempt to send a rename/move operation for the lower inode before the highest inode number was renamed/move. This issue is easy to trigger with the following steps: $ mkfs.btrfs -f /dev/sdb3 $ mount /dev/sdb3 /mnt/btrfs $ mkdir -p /mnt/btrfs/a/b/c/d $ mkdir /mnt/btrfs/a/b/c2 $ btrfs subvol snapshot -r /mnt/btrfs /mnt/btrfs/snap1 $ mv /mnt/btrfs/a/b/c/d /mnt/btrfs/a/b/c2/d2 $ mv /mnt/btrfs/a/b/c /mnt/btrfs/a/b/c2/d2/cc $ btrfs subvol snapshot -r /mnt/btrfs /mnt/btrfs/snap2 $ btrfs send -p /mnt/btrfs/snap1 /mnt/btrfs/snap2 > /tmp/incremental.send The structure of the filesystem when the first snapshot is taken is: . (ino 256) |-- a (ino 257) |-- b (ino 258) |-- c (ino 259) | |-- d (ino 260) | |-- c2 (ino 261) And its structure when the second snapshot is taken is: . (ino 256) |-- a (ino 257) |-- b (ino 258) |-- c2 (ino 261) |-- d2 (ino 260) |-- cc (ino 259) Before the move/rename operation is performed for the inode 259, the move/rename for inode 260 must be performed, since 259 is now a child of 260. A test case for xfstests, with a more complex scenario, will follow soon. Signed-off-by: Filipe David Borba Manana <fdmanana@gmail.com> Signed-off-by: Josef Bacik <jbacik@fb.com> Signed-off-by: Chris Mason <clm@fb.com>
2014-01-22 10:00:53 +00:00
Btrfs: fix send attempting to rmdir non-empty directories The incremental send algorithm assumed that it was possible to issue a directory remove (rmdir) if the the inode number it was currently processing was greater than (or equal) to any inode that referenced the directory's inode. This wasn't a valid assumption because any such inode might be a child directory that is pending a move/rename operation, because it was moved into a directory that has a higher inode number and was moved/renamed too - in other words, the case the following commit addressed: 9f03740a956d7ac6a1b8f8c455da6fa5cae11c22 (Btrfs: fix infinite path build loops in incremental send) This made an incremental send issue an rmdir operation before the target directory was actually empty, which made btrfs receive fail. Therefore it needs to wait for all pending child directory inodes to be moved/renamed before sending an rmdir operation. Simple steps to reproduce this issue: $ mkfs.btrfs -f /dev/sdb3 $ mount /dev/sdb3 /mnt/btrfs $ mkdir -p /mnt/btrfs/a/b/c/x $ mkdir /mnt/btrfs/a/b/y $ btrfs subvolume snapshot -r /mnt/btrfs /mnt/btrfs/snap1 $ btrfs send /mnt/btrfs/snap1 -f /tmp/base.send $ mv /mnt/btrfs/a/b/y /mnt/btrfs/a/b/YY $ mv /mnt/btrfs/a/b/c/x /mnt/btrfs/a/b/YY $ rmdir /mnt/btrfs/a/b/c $ btrfs subvolume snapshot -r /mnt/btrfs /mnt/btrfs/snap2 $ btrfs send -p /mnt/btrfs/snap1 /mnt/btrfs/snap2 -f /tmp/incremental.send $ umount /mnt/btrfs $ mkfs.btrfs -f /dev/sdb3 $ mount /dev/sdb3 /mnt/btrfs $ btrfs receive /mnt/btrfs -f /tmp/base.send $ btrfs receive /mnt/btrfs -f /tmp/incremental.send The second btrfs receive command failed with: ERROR: rmdir o259-6-0 failed. Directory not empty A test case for xfstests follows. Signed-off-by: Filipe David Borba Manana <fdmanana@gmail.com> Signed-off-by: Josef Bacik <jbacik@fb.com>
2014-02-19 14:31:44 +00:00
Btrfs: fix infinite path build loops in incremental send The send operation processes inodes by their ascending number, and assumes that any rename/move operation can be successfully performed (sent to the caller) once all previous inodes (those with a smaller inode number than the one we're currently processing) were processed. This is not true when an incremental send had to process an hierarchical change between 2 snapshots where the parent-children relationship between directory inodes was reversed - that is, parents became children and children became parents. This situation made the path building code go into an infinite loop, which kept allocating more and more memory that eventually lead to a krealloc warning being displayed in dmesg: WARNING: CPU: 1 PID: 5705 at mm/page_alloc.c:2477 __alloc_pages_nodemask+0x365/0xad0() Modules linked in: btrfs raid6_pq xor pci_stub vboxpci(O) vboxnetadp(O) vboxnetflt(O) vboxdrv(O) snd_hda_codec_hdmi snd_hda_codec_realtek joydev radeon snd_hda_intel snd_hda_codec snd_hwdep snd_seq_midi snd_pcm psmouse i915 snd_rawmidi serio_raw snd_seq_midi_event lpc_ich snd_seq snd_timer ttm snd_seq_device rfcomm drm_kms_helper parport_pc bnep bluetooth drm ppdev snd soundcore i2c_algo_bit snd_page_alloc binfmt_misc video lp parport r8169 mii hid_generic usbhid hid CPU: 1 PID: 5705 Comm: btrfs Tainted: G O 3.13.0-rc7-fdm-btrfs-next-18+ #3 Hardware name: To Be Filled By O.E.M. To Be Filled By O.E.M./Z77 Pro4, BIOS P1.50 09/04/2012 [ 5381.660441] 00000000000009ad ffff8806f6f2f4e8 ffffffff81777434 0000000000000007 [ 5381.660447] 0000000000000000 ffff8806f6f2f528 ffffffff8104a9ec ffff8807038f36f0 [ 5381.660452] 0000000000000000 0000000000000206 ffff8807038f2490 ffff8807038f36f0 [ 5381.660457] Call Trace: [ 5381.660464] [<ffffffff81777434>] dump_stack+0x4e/0x68 [ 5381.660471] [<ffffffff8104a9ec>] warn_slowpath_common+0x8c/0xc0 [ 5381.660476] [<ffffffff8104aa3a>] warn_slowpath_null+0x1a/0x20 [ 5381.660480] [<ffffffff81144995>] __alloc_pages_nodemask+0x365/0xad0 [ 5381.660487] [<ffffffff8108313f>] ? local_clock+0x4f/0x60 [ 5381.660491] [<ffffffff811430e8>] ? free_one_page+0x98/0x440 [ 5381.660495] [<ffffffff8108313f>] ? local_clock+0x4f/0x60 [ 5381.660502] [<ffffffff8113fae4>] ? __get_free_pages+0x14/0x50 [ 5381.660508] [<ffffffff81095fb8>] ? trace_hardirqs_off_caller+0x28/0xd0 [ 5381.660515] [<ffffffff81183caf>] alloc_pages_current+0x10f/0x1f0 [ 5381.660520] [<ffffffff8113fae4>] ? __get_free_pages+0x14/0x50 [ 5381.660524] [<ffffffff8113fae4>] __get_free_pages+0x14/0x50 [ 5381.660530] [<ffffffff8115dace>] kmalloc_order_trace+0x3e/0x100 [ 5381.660536] [<ffffffff81191ea0>] __kmalloc_track_caller+0x220/0x230 [ 5381.660560] [<ffffffffa0729fdb>] ? fs_path_ensure_buf.part.12+0x6b/0x200 [btrfs] [ 5381.660564] [<ffffffff8178085c>] ? retint_restore_args+0xe/0xe [ 5381.660569] [<ffffffff811580ef>] krealloc+0x6f/0xb0 [ 5381.660586] [<ffffffffa0729fdb>] fs_path_ensure_buf.part.12+0x6b/0x200 [btrfs] [ 5381.660601] [<ffffffffa072a208>] fs_path_prepare_for_add+0x98/0xb0 [btrfs] [ 5381.660615] [<ffffffffa072a2bc>] fs_path_add_path+0x2c/0x60 [btrfs] [ 5381.660628] [<ffffffffa072c55c>] get_cur_path+0x7c/0x1c0 [btrfs] Even without this loop, the incremental send couldn't succeed, because it would attempt to send a rename/move operation for the lower inode before the highest inode number was renamed/move. This issue is easy to trigger with the following steps: $ mkfs.btrfs -f /dev/sdb3 $ mount /dev/sdb3 /mnt/btrfs $ mkdir -p /mnt/btrfs/a/b/c/d $ mkdir /mnt/btrfs/a/b/c2 $ btrfs subvol snapshot -r /mnt/btrfs /mnt/btrfs/snap1 $ mv /mnt/btrfs/a/b/c/d /mnt/btrfs/a/b/c2/d2 $ mv /mnt/btrfs/a/b/c /mnt/btrfs/a/b/c2/d2/cc $ btrfs subvol snapshot -r /mnt/btrfs /mnt/btrfs/snap2 $ btrfs send -p /mnt/btrfs/snap1 /mnt/btrfs/snap2 > /tmp/incremental.send The structure of the filesystem when the first snapshot is taken is: . (ino 256) |-- a (ino 257) |-- b (ino 258) |-- c (ino 259) | |-- d (ino 260) | |-- c2 (ino 261) And its structure when the second snapshot is taken is: . (ino 256) |-- a (ino 257) |-- b (ino 258) |-- c2 (ino 261) |-- d2 (ino 260) |-- cc (ino 259) Before the move/rename operation is performed for the inode 259, the move/rename for inode 260 must be performed, since 259 is now a child of 260. A test case for xfstests, with a more complex scenario, will follow soon. Signed-off-by: Filipe David Borba Manana <fdmanana@gmail.com> Signed-off-by: Josef Bacik <jbacik@fb.com> Signed-off-by: Chris Mason <clm@fb.com>
2014-01-22 10:00:53 +00:00
Btrfs: fix send attempting to rmdir non-empty directories The incremental send algorithm assumed that it was possible to issue a directory remove (rmdir) if the the inode number it was currently processing was greater than (or equal) to any inode that referenced the directory's inode. This wasn't a valid assumption because any such inode might be a child directory that is pending a move/rename operation, because it was moved into a directory that has a higher inode number and was moved/renamed too - in other words, the case the following commit addressed: 9f03740a956d7ac6a1b8f8c455da6fa5cae11c22 (Btrfs: fix infinite path build loops in incremental send) This made an incremental send issue an rmdir operation before the target directory was actually empty, which made btrfs receive fail. Therefore it needs to wait for all pending child directory inodes to be moved/renamed before sending an rmdir operation. Simple steps to reproduce this issue: $ mkfs.btrfs -f /dev/sdb3 $ mount /dev/sdb3 /mnt/btrfs $ mkdir -p /mnt/btrfs/a/b/c/x $ mkdir /mnt/btrfs/a/b/y $ btrfs subvolume snapshot -r /mnt/btrfs /mnt/btrfs/snap1 $ btrfs send /mnt/btrfs/snap1 -f /tmp/base.send $ mv /mnt/btrfs/a/b/y /mnt/btrfs/a/b/YY $ mv /mnt/btrfs/a/b/c/x /mnt/btrfs/a/b/YY $ rmdir /mnt/btrfs/a/b/c $ btrfs subvolume snapshot -r /mnt/btrfs /mnt/btrfs/snap2 $ btrfs send -p /mnt/btrfs/snap1 /mnt/btrfs/snap2 -f /tmp/incremental.send $ umount /mnt/btrfs $ mkfs.btrfs -f /dev/sdb3 $ mount /dev/sdb3 /mnt/btrfs $ btrfs receive /mnt/btrfs -f /tmp/base.send $ btrfs receive /mnt/btrfs -f /tmp/incremental.send The second btrfs receive command failed with: ERROR: rmdir o259-6-0 failed. Directory not empty A test case for xfstests follows. Signed-off-by: Filipe David Borba Manana <fdmanana@gmail.com> Signed-off-by: Josef Bacik <jbacik@fb.com>
2014-02-19 14:31:44 +00:00
Btrfs: fix infinite path build loops in incremental send The send operation processes inodes by their ascending number, and assumes that any rename/move operation can be successfully performed (sent to the caller) once all previous inodes (those with a smaller inode number than the one we're currently processing) were processed. This is not true when an incremental send had to process an hierarchical change between 2 snapshots where the parent-children relationship between directory inodes was reversed - that is, parents became children and children became parents. This situation made the path building code go into an infinite loop, which kept allocating more and more memory that eventually lead to a krealloc warning being displayed in dmesg: WARNING: CPU: 1 PID: 5705 at mm/page_alloc.c:2477 __alloc_pages_nodemask+0x365/0xad0() Modules linked in: btrfs raid6_pq xor pci_stub vboxpci(O) vboxnetadp(O) vboxnetflt(O) vboxdrv(O) snd_hda_codec_hdmi snd_hda_codec_realtek joydev radeon snd_hda_intel snd_hda_codec snd_hwdep snd_seq_midi snd_pcm psmouse i915 snd_rawmidi serio_raw snd_seq_midi_event lpc_ich snd_seq snd_timer ttm snd_seq_device rfcomm drm_kms_helper parport_pc bnep bluetooth drm ppdev snd soundcore i2c_algo_bit snd_page_alloc binfmt_misc video lp parport r8169 mii hid_generic usbhid hid CPU: 1 PID: 5705 Comm: btrfs Tainted: G O 3.13.0-rc7-fdm-btrfs-next-18+ #3 Hardware name: To Be Filled By O.E.M. To Be Filled By O.E.M./Z77 Pro4, BIOS P1.50 09/04/2012 [ 5381.660441] 00000000000009ad ffff8806f6f2f4e8 ffffffff81777434 0000000000000007 [ 5381.660447] 0000000000000000 ffff8806f6f2f528 ffffffff8104a9ec ffff8807038f36f0 [ 5381.660452] 0000000000000000 0000000000000206 ffff8807038f2490 ffff8807038f36f0 [ 5381.660457] Call Trace: [ 5381.660464] [<ffffffff81777434>] dump_stack+0x4e/0x68 [ 5381.660471] [<ffffffff8104a9ec>] warn_slowpath_common+0x8c/0xc0 [ 5381.660476] [<ffffffff8104aa3a>] warn_slowpath_null+0x1a/0x20 [ 5381.660480] [<ffffffff81144995>] __alloc_pages_nodemask+0x365/0xad0 [ 5381.660487] [<ffffffff8108313f>] ? local_clock+0x4f/0x60 [ 5381.660491] [<ffffffff811430e8>] ? free_one_page+0x98/0x440 [ 5381.660495] [<ffffffff8108313f>] ? local_clock+0x4f/0x60 [ 5381.660502] [<ffffffff8113fae4>] ? __get_free_pages+0x14/0x50 [ 5381.660508] [<ffffffff81095fb8>] ? trace_hardirqs_off_caller+0x28/0xd0 [ 5381.660515] [<ffffffff81183caf>] alloc_pages_current+0x10f/0x1f0 [ 5381.660520] [<ffffffff8113fae4>] ? __get_free_pages+0x14/0x50 [ 5381.660524] [<ffffffff8113fae4>] __get_free_pages+0x14/0x50 [ 5381.660530] [<ffffffff8115dace>] kmalloc_order_trace+0x3e/0x100 [ 5381.660536] [<ffffffff81191ea0>] __kmalloc_track_caller+0x220/0x230 [ 5381.660560] [<ffffffffa0729fdb>] ? fs_path_ensure_buf.part.12+0x6b/0x200 [btrfs] [ 5381.660564] [<ffffffff8178085c>] ? retint_restore_args+0xe/0xe [ 5381.660569] [<ffffffff811580ef>] krealloc+0x6f/0xb0 [ 5381.660586] [<ffffffffa0729fdb>] fs_path_ensure_buf.part.12+0x6b/0x200 [btrfs] [ 5381.660601] [<ffffffffa072a208>] fs_path_prepare_for_add+0x98/0xb0 [btrfs] [ 5381.660615] [<ffffffffa072a2bc>] fs_path_add_path+0x2c/0x60 [btrfs] [ 5381.660628] [<ffffffffa072c55c>] get_cur_path+0x7c/0x1c0 [btrfs] Even without this loop, the incremental send couldn't succeed, because it would attempt to send a rename/move operation for the lower inode before the highest inode number was renamed/move. This issue is easy to trigger with the following steps: $ mkfs.btrfs -f /dev/sdb3 $ mount /dev/sdb3 /mnt/btrfs $ mkdir -p /mnt/btrfs/a/b/c/d $ mkdir /mnt/btrfs/a/b/c2 $ btrfs subvol snapshot -r /mnt/btrfs /mnt/btrfs/snap1 $ mv /mnt/btrfs/a/b/c/d /mnt/btrfs/a/b/c2/d2 $ mv /mnt/btrfs/a/b/c /mnt/btrfs/a/b/c2/d2/cc $ btrfs subvol snapshot -r /mnt/btrfs /mnt/btrfs/snap2 $ btrfs send -p /mnt/btrfs/snap1 /mnt/btrfs/snap2 > /tmp/incremental.send The structure of the filesystem when the first snapshot is taken is: . (ino 256) |-- a (ino 257) |-- b (ino 258) |-- c (ino 259) | |-- d (ino 260) | |-- c2 (ino 261) And its structure when the second snapshot is taken is: . (ino 256) |-- a (ino 257) |-- b (ino 258) |-- c2 (ino 261) |-- d2 (ino 260) |-- cc (ino 259) Before the move/rename operation is performed for the inode 259, the move/rename for inode 260 must be performed, since 259 is now a child of 260. A test case for xfstests, with a more complex scenario, will follow soon. Signed-off-by: Filipe David Borba Manana <fdmanana@gmail.com> Signed-off-by: Josef Bacik <jbacik@fb.com> Signed-off-by: Chris Mason <clm@fb.com>
2014-01-22 10:00:53 +00:00
Btrfs: fix send attempting to rmdir non-empty directories The incremental send algorithm assumed that it was possible to issue a directory remove (rmdir) if the the inode number it was currently processing was greater than (or equal) to any inode that referenced the directory's inode. This wasn't a valid assumption because any such inode might be a child directory that is pending a move/rename operation, because it was moved into a directory that has a higher inode number and was moved/renamed too - in other words, the case the following commit addressed: 9f03740a956d7ac6a1b8f8c455da6fa5cae11c22 (Btrfs: fix infinite path build loops in incremental send) This made an incremental send issue an rmdir operation before the target directory was actually empty, which made btrfs receive fail. Therefore it needs to wait for all pending child directory inodes to be moved/renamed before sending an rmdir operation. Simple steps to reproduce this issue: $ mkfs.btrfs -f /dev/sdb3 $ mount /dev/sdb3 /mnt/btrfs $ mkdir -p /mnt/btrfs/a/b/c/x $ mkdir /mnt/btrfs/a/b/y $ btrfs subvolume snapshot -r /mnt/btrfs /mnt/btrfs/snap1 $ btrfs send /mnt/btrfs/snap1 -f /tmp/base.send $ mv /mnt/btrfs/a/b/y /mnt/btrfs/a/b/YY $ mv /mnt/btrfs/a/b/c/x /mnt/btrfs/a/b/YY $ rmdir /mnt/btrfs/a/b/c $ btrfs subvolume snapshot -r /mnt/btrfs /mnt/btrfs/snap2 $ btrfs send -p /mnt/btrfs/snap1 /mnt/btrfs/snap2 -f /tmp/incremental.send $ umount /mnt/btrfs $ mkfs.btrfs -f /dev/sdb3 $ mount /dev/sdb3 /mnt/btrfs $ btrfs receive /mnt/btrfs -f /tmp/base.send $ btrfs receive /mnt/btrfs -f /tmp/incremental.send The second btrfs receive command failed with: ERROR: rmdir o259-6-0 failed. Directory not empty A test case for xfstests follows. Signed-off-by: Filipe David Borba Manana <fdmanana@gmail.com> Signed-off-by: Josef Bacik <jbacik@fb.com>
2014-02-19 14:31:44 +00:00
Btrfs: fix infinite path build loops in incremental send The send operation processes inodes by their ascending number, and assumes that any rename/move operation can be successfully performed (sent to the caller) once all previous inodes (those with a smaller inode number than the one we're currently processing) were processed. This is not true when an incremental send had to process an hierarchical change between 2 snapshots where the parent-children relationship between directory inodes was reversed - that is, parents became children and children became parents. This situation made the path building code go into an infinite loop, which kept allocating more and more memory that eventually lead to a krealloc warning being displayed in dmesg: WARNING: CPU: 1 PID: 5705 at mm/page_alloc.c:2477 __alloc_pages_nodemask+0x365/0xad0() Modules linked in: btrfs raid6_pq xor pci_stub vboxpci(O) vboxnetadp(O) vboxnetflt(O) vboxdrv(O) snd_hda_codec_hdmi snd_hda_codec_realtek joydev radeon snd_hda_intel snd_hda_codec snd_hwdep snd_seq_midi snd_pcm psmouse i915 snd_rawmidi serio_raw snd_seq_midi_event lpc_ich snd_seq snd_timer ttm snd_seq_device rfcomm drm_kms_helper parport_pc bnep bluetooth drm ppdev snd soundcore i2c_algo_bit snd_page_alloc binfmt_misc video lp parport r8169 mii hid_generic usbhid hid CPU: 1 PID: 5705 Comm: btrfs Tainted: G O 3.13.0-rc7-fdm-btrfs-next-18+ #3 Hardware name: To Be Filled By O.E.M. To Be Filled By O.E.M./Z77 Pro4, BIOS P1.50 09/04/2012 [ 5381.660441] 00000000000009ad ffff8806f6f2f4e8 ffffffff81777434 0000000000000007 [ 5381.660447] 0000000000000000 ffff8806f6f2f528 ffffffff8104a9ec ffff8807038f36f0 [ 5381.660452] 0000000000000000 0000000000000206 ffff8807038f2490 ffff8807038f36f0 [ 5381.660457] Call Trace: [ 5381.660464] [<ffffffff81777434>] dump_stack+0x4e/0x68 [ 5381.660471] [<ffffffff8104a9ec>] warn_slowpath_common+0x8c/0xc0 [ 5381.660476] [<ffffffff8104aa3a>] warn_slowpath_null+0x1a/0x20 [ 5381.660480] [<ffffffff81144995>] __alloc_pages_nodemask+0x365/0xad0 [ 5381.660487] [<ffffffff8108313f>] ? local_clock+0x4f/0x60 [ 5381.660491] [<ffffffff811430e8>] ? free_one_page+0x98/0x440 [ 5381.660495] [<ffffffff8108313f>] ? local_clock+0x4f/0x60 [ 5381.660502] [<ffffffff8113fae4>] ? __get_free_pages+0x14/0x50 [ 5381.660508] [<ffffffff81095fb8>] ? trace_hardirqs_off_caller+0x28/0xd0 [ 5381.660515] [<ffffffff81183caf>] alloc_pages_current+0x10f/0x1f0 [ 5381.660520] [<ffffffff8113fae4>] ? __get_free_pages+0x14/0x50 [ 5381.660524] [<ffffffff8113fae4>] __get_free_pages+0x14/0x50 [ 5381.660530] [<ffffffff8115dace>] kmalloc_order_trace+0x3e/0x100 [ 5381.660536] [<ffffffff81191ea0>] __kmalloc_track_caller+0x220/0x230 [ 5381.660560] [<ffffffffa0729fdb>] ? fs_path_ensure_buf.part.12+0x6b/0x200 [btrfs] [ 5381.660564] [<ffffffff8178085c>] ? retint_restore_args+0xe/0xe [ 5381.660569] [<ffffffff811580ef>] krealloc+0x6f/0xb0 [ 5381.660586] [<ffffffffa0729fdb>] fs_path_ensure_buf.part.12+0x6b/0x200 [btrfs] [ 5381.660601] [<ffffffffa072a208>] fs_path_prepare_for_add+0x98/0xb0 [btrfs] [ 5381.660615] [<ffffffffa072a2bc>] fs_path_add_path+0x2c/0x60 [btrfs] [ 5381.660628] [<ffffffffa072c55c>] get_cur_path+0x7c/0x1c0 [btrfs] Even without this loop, the incremental send couldn't succeed, because it would attempt to send a rename/move operation for the lower inode before the highest inode number was renamed/move. This issue is easy to trigger with the following steps: $ mkfs.btrfs -f /dev/sdb3 $ mount /dev/sdb3 /mnt/btrfs $ mkdir -p /mnt/btrfs/a/b/c/d $ mkdir /mnt/btrfs/a/b/c2 $ btrfs subvol snapshot -r /mnt/btrfs /mnt/btrfs/snap1 $ mv /mnt/btrfs/a/b/c/d /mnt/btrfs/a/b/c2/d2 $ mv /mnt/btrfs/a/b/c /mnt/btrfs/a/b/c2/d2/cc $ btrfs subvol snapshot -r /mnt/btrfs /mnt/btrfs/snap2 $ btrfs send -p /mnt/btrfs/snap1 /mnt/btrfs/snap2 > /tmp/incremental.send The structure of the filesystem when the first snapshot is taken is: . (ino 256) |-- a (ino 257) |-- b (ino 258) |-- c (ino 259) | |-- d (ino 260) | |-- c2 (ino 261) And its structure when the second snapshot is taken is: . (ino 256) |-- a (ino 257) |-- b (ino 258) |-- c2 (ino 261) |-- d2 (ino 260) |-- cc (ino 259) Before the move/rename operation is performed for the inode 259, the move/rename for inode 260 must be performed, since 259 is now a child of 260. A test case for xfstests, with a more complex scenario, will follow soon. Signed-off-by: Filipe David Borba Manana <fdmanana@gmail.com> Signed-off-by: Josef Bacik <jbacik@fb.com> Signed-off-by: Chris Mason <clm@fb.com>
2014-01-22 10:00:53 +00:00
Btrfs: part 2, fix incremental send's decision to delay a dir move/rename For an incremental send, fix the process of determining whether the directory inode we're currently processing needs to have its move/rename operation delayed. We were ignoring the fact that if the inode's new immediate ancestor has a higher inode number than ours but wasn't renamed/moved, we might still need to delay our move/rename, because some other ancestor directory higher in the hierarchy might have an inode number higher than ours *and* was renamed/moved too - in this case we have to wait for rename/move of that ancestor to happen before our current directory's rename/move operation. Simple steps to reproduce this issue: $ mkfs.btrfs -f /dev/sdd $ mount /dev/sdd /mnt $ mkdir -p /mnt/a/x1/x2 $ mkdir /mnt/a/Z $ mkdir -p /mnt/a/x1/x2/x3/x4/x5 $ btrfs subvolume snapshot -r /mnt /mnt/snap1 $ btrfs send /mnt/snap1 -f /tmp/base.send $ mv /mnt/a/x1/x2/x3 /mnt/a/Z/X33 $ mv /mnt/a/x1/x2 /mnt/a/Z/X33/x4/x5/X22 $ btrfs subvolume snapshot -r /mnt /mnt/snap2 $ btrfs send -p /mnt/snap1 /mnt/snap2 -f /tmp/incremental.send The incremental send caused the kernel code to enter an infinite loop when building the path string for directory Z after its references are processed. A more complex scenario: $ mkfs.btrfs -f /dev/sdd $ mount /dev/sdd /mnt $ mkdir -p /mnt/a/b/c/d $ mkdir /mnt/a/b/c/d/e $ mkdir /mnt/a/b/c/d/f $ mv /mnt/a/b/c/d/e /mnt/a/b/c/d/f/E2 $ mkdir /mmt/a/b/c/g $ mv /mnt/a/b/c/d /mnt/a/b/D2 $ btrfs subvolume snapshot -r /mnt /mnt/snap1 $ btrfs send /mnt/snap1 -f /tmp/base.send $ mkdir /mnt/a/o $ mv /mnt/a/b/c/g /mnt/a/b/D2/f/G2 $ mv /mnt/a/b/D2 /mnt/a/b/dd $ mv /mnt/a/b/c /mnt/a/C2 $ mv /mnt/a/b/dd/f /mnt/a/o/FF $ mv /mnt/a/b /mnt/a/o/FF/E2/BB $ btrfs subvolume snapshot -r /mnt /mnt/snap2 $ btrfs send -p /mnt/snap1 /mnt/snap2 -f /tmp/incremental.send A test case for xfstests follows. Signed-off-by: Filipe David Borba Manana <fdmanana@gmail.com> Signed-off-by: Chris Mason <clm@fb.com>
2014-03-19 14:20:54 +00:00
Btrfs: send, fix more issues related to directory renames This is a continuation of the previous changes titled: Btrfs: fix incremental send's decision to delay a dir move/rename Btrfs: part 2, fix incremental send's decision to delay a dir move/rename There's a few more cases where a directory rename/move must be delayed which was previously overlooked. If our immediate ancestor has a lower inode number than ours and it doesn't have a delayed rename/move operation associated to it, it doesn't mean there isn't any non-direct ancestor of our current inode that needs to be renamed/moved before our current inode (i.e. with a higher inode number than ours). So we can't stop the search if our immediate ancestor has a lower inode number than ours, we need to navigate the directory hierarchy upwards until we hit the root or: 1) find an ancestor with an higher inode number that was renamed/moved in the send root too (or already has a pending rename/move registered); 2) find an ancestor that is a new directory (higher inode number than ours and exists only in the send root). Reproducer for case 1) $ mkfs.btrfs -f /dev/sdd $ mount /dev/sdd /mnt $ mkdir -p /mnt/a/b $ mkdir -p /mnt/a/c/d $ mkdir /mnt/a/b/e $ mkdir /mnt/a/c/d/f $ mv /mnt/a/b /mnt/a/c/d/2b $ mkdir /mnt/a/x $ mkdir /mnt/a/y $ btrfs subvolume snapshot -r /mnt /mnt/snap1 $ btrfs send /mnt/snap1 -f /tmp/base.send $ mv /mnt/a/x /mnt/a/y $ mv /mnt/a/c/d/2b/e /mnt/a/c/d/2b/2e $ mv /mnt/a/c/d /mnt/a/h/2d $ mv /mnt/a/c /mnt/a/h/2d/2b/2c $ btrfs subvolume snapshot -r /mnt /mnt/snap2 $ btrfs send -p /mnt/snap1 /mnt/snap2 -f /tmp/incremental.send Simple reproducer for case 2) $ mkfs.btrfs -f /dev/sdd $ mount /dev/sdd /mnt $ mkdir -p /mnt/a/b $ mkdir /mnt/a/c $ mv /mnt/a/b /mnt/a/c/b2 $ mkdir /mnt/a/e $ btrfs subvolume snapshot -r /mnt /mnt/snap1 $ btrfs send /mnt/snap1 -f /tmp/base.send $ mv /mnt/a/c/b2 /mnt/a/e/b3 $ mkdir /mnt/a/e/b3/f $ mkdir /mnt/a/h $ mv /mnt/a/c /mnt/a/e/b3/f/c2 $ mv /mnt/a/e /mnt/a/h/e2 $ btrfs subvolume snapshot -r /mnt /mnt/snap2 $ btrfs send -p /mnt/snap1 /mnt/snap2 -f /tmp/incremental.send Another simple reproducer for case 2) $ mkfs.btrfs -f /dev/sdd $ mount /dev/sdd /mnt $ mkdir -p /mnt/a/b $ mkdir /mnt/a/c $ mkdir /mnt/a/b/d $ mkdir /mnt/a/c/e $ btrfs subvolume snapshot -r /mnt /mnt/snap1 $ btrfs send /mnt/snap1 -f /tmp/base.send $ mkdir /mnt/a/b/d/f $ mkdir /mnt/a/b/g $ mv /mnt/a/c/e /mnt/a/b/g/e2 $ mv /mnt/a/c /mnt/a/b/d/f/c2 $ mv /mnt/a/b/d/f /mnt/a/b/g/e2/f2 $ btrfs subvolume snapshot -r /mnt /mnt/snap2 $ btrfs send -p /mnt/snap1 /mnt/snap2 -f /tmp/incremental.send More complex reproducer for case 2) $ mkfs.btrfs -f /dev/sdd $ mount /dev/sdd /mnt $ mkdir -p /mnt/a/b $ mkdir -p /mnt/a/c/d $ mkdir /mnt/a/b/e $ mkdir /mnt/a/c/d/f $ mv /mnt/a/b /mnt/a/c/d/2b $ mkdir /mnt/a/x $ mkdir /mnt/a/y $ btrfs subvolume snapshot -r /mnt /mnt/snap1 $ btrfs send /mnt/snap1 -f /tmp/base.send $ mv /mnt/a/x /mnt/a/y $ mv /mnt/a/c/d/2b/e /mnt/a/c/d/2b/2e $ mv /mnt/a/c/d /mnt/a/h/2d $ mv /mnt/a/c /mnt/a/h/2d/2b/2c $ btrfs subvolume snapshot -r /mnt /mnt/snap2 $ btrfs send -p /mnt/snap1 /mnt/snap2 -f /tmp/incremental.send For both cases the incremental send would enter an infinite loop when building path strings. While solving these cases, this change also re-implements the code to detect when directory moves/renames should be delayed. Instead of dealing with several specific cases separately, it's now more generic handling all cases with a simple detection algorithm and if when applying a delayed move/rename there's a path loop detected, it further delays the move/rename registering a new ancestor inode as the dependency inode (so our rename happens after that ancestor is renamed). Tests for these cases is being added to xfstests too. Signed-off-by: Filipe David Borba Manana <fdmanana@gmail.com> Signed-off-by: Chris Mason <clm@fb.com>
2014-03-27 20:14:01 +00:00
Btrfs: incremental send, don't rename a directory too soon There's one more case where we can't issue a rename operation for a directory as soon as we process it. We used to delay directory renames only if they have some ancestor directory with a higher inode number that got renamed too, but there's another case where we need to delay the rename too - when a directory A is renamed to the old name of a directory B but that directory B has its rename delayed because it has now (in the send root) an ancestor with a higher inode number that was renamed. If we don't delay the directory rename in this case, the receiving end of the send stream will attempt to rename A to the old name of B before B got renamed to its new name, which results in a "directory not empty" error. So fix this by delaying directory renames for this case too. Steps to reproduce: $ mkfs.btrfs -f /dev/sdb $ mount /dev/sdb /mnt $ mkdir /mnt/a $ mkdir /mnt/b $ mkdir /mnt/c $ touch /mnt/a/file $ btrfs subvolume snapshot -r /mnt /mnt/snap1 $ mv /mnt/c /mnt/x $ mv /mnt/a /mnt/x/y $ mv /mnt/b /mnt/a $ btrfs subvolume snapshot -r /mnt /mnt/snap2 $ btrfs send /mnt/snap1 -f /tmp/1.send $ btrfs send -p /mnt/snap1 /mnt/snap2 -f /tmp/2.send $ mkfs.btrfs -f /dev/sdc $ mount /dev/sdc /mnt2 $ btrfs receive /mnt2 -f /tmp/1.send $ btrfs receive /mnt2 -f /tmp/2.send ERROR: rename b -> a failed. Directory not empty A test case for xfstests follows soon. Reported-by: Ames Cornish <ames@cornishes.net> Signed-off-by: Filipe Manana <fdmanana@suse.com> Signed-off-by: Chris Mason <clm@fb.com>
2015-02-28 22:29:22 +00:00
Btrfs: fix infinite path build loops in incremental send The send operation processes inodes by their ascending number, and assumes that any rename/move operation can be successfully performed (sent to the caller) once all previous inodes (those with a smaller inode number than the one we're currently processing) were processed. This is not true when an incremental send had to process an hierarchical change between 2 snapshots where the parent-children relationship between directory inodes was reversed - that is, parents became children and children became parents. This situation made the path building code go into an infinite loop, which kept allocating more and more memory that eventually lead to a krealloc warning being displayed in dmesg: WARNING: CPU: 1 PID: 5705 at mm/page_alloc.c:2477 __alloc_pages_nodemask+0x365/0xad0() Modules linked in: btrfs raid6_pq xor pci_stub vboxpci(O) vboxnetadp(O) vboxnetflt(O) vboxdrv(O) snd_hda_codec_hdmi snd_hda_codec_realtek joydev radeon snd_hda_intel snd_hda_codec snd_hwdep snd_seq_midi snd_pcm psmouse i915 snd_rawmidi serio_raw snd_seq_midi_event lpc_ich snd_seq snd_timer ttm snd_seq_device rfcomm drm_kms_helper parport_pc bnep bluetooth drm ppdev snd soundcore i2c_algo_bit snd_page_alloc binfmt_misc video lp parport r8169 mii hid_generic usbhid hid CPU: 1 PID: 5705 Comm: btrfs Tainted: G O 3.13.0-rc7-fdm-btrfs-next-18+ #3 Hardware name: To Be Filled By O.E.M. To Be Filled By O.E.M./Z77 Pro4, BIOS P1.50 09/04/2012 [ 5381.660441] 00000000000009ad ffff8806f6f2f4e8 ffffffff81777434 0000000000000007 [ 5381.660447] 0000000000000000 ffff8806f6f2f528 ffffffff8104a9ec ffff8807038f36f0 [ 5381.660452] 0000000000000000 0000000000000206 ffff8807038f2490 ffff8807038f36f0 [ 5381.660457] Call Trace: [ 5381.660464] [<ffffffff81777434>] dump_stack+0x4e/0x68 [ 5381.660471] [<ffffffff8104a9ec>] warn_slowpath_common+0x8c/0xc0 [ 5381.660476] [<ffffffff8104aa3a>] warn_slowpath_null+0x1a/0x20 [ 5381.660480] [<ffffffff81144995>] __alloc_pages_nodemask+0x365/0xad0 [ 5381.660487] [<ffffffff8108313f>] ? local_clock+0x4f/0x60 [ 5381.660491] [<ffffffff811430e8>] ? free_one_page+0x98/0x440 [ 5381.660495] [<ffffffff8108313f>] ? local_clock+0x4f/0x60 [ 5381.660502] [<ffffffff8113fae4>] ? __get_free_pages+0x14/0x50 [ 5381.660508] [<ffffffff81095fb8>] ? trace_hardirqs_off_caller+0x28/0xd0 [ 5381.660515] [<ffffffff81183caf>] alloc_pages_current+0x10f/0x1f0 [ 5381.660520] [<ffffffff8113fae4>] ? __get_free_pages+0x14/0x50 [ 5381.660524] [<ffffffff8113fae4>] __get_free_pages+0x14/0x50 [ 5381.660530] [<ffffffff8115dace>] kmalloc_order_trace+0x3e/0x100 [ 5381.660536] [<ffffffff81191ea0>] __kmalloc_track_caller+0x220/0x230 [ 5381.660560] [<ffffffffa0729fdb>] ? fs_path_ensure_buf.part.12+0x6b/0x200 [btrfs] [ 5381.660564] [<ffffffff8178085c>] ? retint_restore_args+0xe/0xe [ 5381.660569] [<ffffffff811580ef>] krealloc+0x6f/0xb0 [ 5381.660586] [<ffffffffa0729fdb>] fs_path_ensure_buf.part.12+0x6b/0x200 [btrfs] [ 5381.660601] [<ffffffffa072a208>] fs_path_prepare_for_add+0x98/0xb0 [btrfs] [ 5381.660615] [<ffffffffa072a2bc>] fs_path_add_path+0x2c/0x60 [btrfs] [ 5381.660628] [<ffffffffa072c55c>] get_cur_path+0x7c/0x1c0 [btrfs] Even without this loop, the incremental send couldn't succeed, because it would attempt to send a rename/move operation for the lower inode before the highest inode number was renamed/move. This issue is easy to trigger with the following steps: $ mkfs.btrfs -f /dev/sdb3 $ mount /dev/sdb3 /mnt/btrfs $ mkdir -p /mnt/btrfs/a/b/c/d $ mkdir /mnt/btrfs/a/b/c2 $ btrfs subvol snapshot -r /mnt/btrfs /mnt/btrfs/snap1 $ mv /mnt/btrfs/a/b/c/d /mnt/btrfs/a/b/c2/d2 $ mv /mnt/btrfs/a/b/c /mnt/btrfs/a/b/c2/d2/cc $ btrfs subvol snapshot -r /mnt/btrfs /mnt/btrfs/snap2 $ btrfs send -p /mnt/btrfs/snap1 /mnt/btrfs/snap2 > /tmp/incremental.send The structure of the filesystem when the first snapshot is taken is: . (ino 256) |-- a (ino 257) |-- b (ino 258) |-- c (ino 259) | |-- d (ino 260) | |-- c2 (ino 261) And its structure when the second snapshot is taken is: . (ino 256) |-- a (ino 257) |-- b (ino 258) |-- c2 (ino 261) |-- d2 (ino 260) |-- cc (ino 259) Before the move/rename operation is performed for the inode 259, the move/rename for inode 260 must be performed, since 259 is now a child of 260. A test case for xfstests, with a more complex scenario, will follow soon. Signed-off-by: Filipe David Borba Manana <fdmanana@gmail.com> Signed-off-by: Josef Bacik <jbacik@fb.com> Signed-off-by: Chris Mason <clm@fb.com>
2014-01-22 10:00:53 +00:00
btrfs: fix uninit variable warning fs/btrfs/send.c:2926: warning: ‘entry’ may be used uninitialized in this function Signed-off-by: Chris Mason <clm@fb.com>
2014-03-21 15:30:44 -07:00
Btrfs: fix infinite path build loops in incremental send The send operation processes inodes by their ascending number, and assumes that any rename/move operation can be successfully performed (sent to the caller) once all previous inodes (those with a smaller inode number than the one we're currently processing) were processed. This is not true when an incremental send had to process an hierarchical change between 2 snapshots where the parent-children relationship between directory inodes was reversed - that is, parents became children and children became parents. This situation made the path building code go into an infinite loop, which kept allocating more and more memory that eventually lead to a krealloc warning being displayed in dmesg: WARNING: CPU: 1 PID: 5705 at mm/page_alloc.c:2477 __alloc_pages_nodemask+0x365/0xad0() Modules linked in: btrfs raid6_pq xor pci_stub vboxpci(O) vboxnetadp(O) vboxnetflt(O) vboxdrv(O) snd_hda_codec_hdmi snd_hda_codec_realtek joydev radeon snd_hda_intel snd_hda_codec snd_hwdep snd_seq_midi snd_pcm psmouse i915 snd_rawmidi serio_raw snd_seq_midi_event lpc_ich snd_seq snd_timer ttm snd_seq_device rfcomm drm_kms_helper parport_pc bnep bluetooth drm ppdev snd soundcore i2c_algo_bit snd_page_alloc binfmt_misc video lp parport r8169 mii hid_generic usbhid hid CPU: 1 PID: 5705 Comm: btrfs Tainted: G O 3.13.0-rc7-fdm-btrfs-next-18+ #3 Hardware name: To Be Filled By O.E.M. To Be Filled By O.E.M./Z77 Pro4, BIOS P1.50 09/04/2012 [ 5381.660441] 00000000000009ad ffff8806f6f2f4e8 ffffffff81777434 0000000000000007 [ 5381.660447] 0000000000000000 ffff8806f6f2f528 ffffffff8104a9ec ffff8807038f36f0 [ 5381.660452] 0000000000000000 0000000000000206 ffff8807038f2490 ffff8807038f36f0 [ 5381.660457] Call Trace: [ 5381.660464] [<ffffffff81777434>] dump_stack+0x4e/0x68 [ 5381.660471] [<ffffffff8104a9ec>] warn_slowpath_common+0x8c/0xc0 [ 5381.660476] [<ffffffff8104aa3a>] warn_slowpath_null+0x1a/0x20 [ 5381.660480] [<ffffffff81144995>] __alloc_pages_nodemask+0x365/0xad0 [ 5381.660487] [<ffffffff8108313f>] ? local_clock+0x4f/0x60 [ 5381.660491] [<ffffffff811430e8>] ? free_one_page+0x98/0x440 [ 5381.660495] [<ffffffff8108313f>] ? local_clock+0x4f/0x60 [ 5381.660502] [<ffffffff8113fae4>] ? __get_free_pages+0x14/0x50 [ 5381.660508] [<ffffffff81095fb8>] ? trace_hardirqs_off_caller+0x28/0xd0 [ 5381.660515] [<ffffffff81183caf>] alloc_pages_current+0x10f/0x1f0 [ 5381.660520] [<ffffffff8113fae4>] ? __get_free_pages+0x14/0x50 [ 5381.660524] [<ffffffff8113fae4>] __get_free_pages+0x14/0x50 [ 5381.660530] [<ffffffff8115dace>] kmalloc_order_trace+0x3e/0x100 [ 5381.660536] [<ffffffff81191ea0>] __kmalloc_track_caller+0x220/0x230 [ 5381.660560] [<ffffffffa0729fdb>] ? fs_path_ensure_buf.part.12+0x6b/0x200 [btrfs] [ 5381.660564] [<ffffffff8178085c>] ? retint_restore_args+0xe/0xe [ 5381.660569] [<ffffffff811580ef>] krealloc+0x6f/0xb0 [ 5381.660586] [<ffffffffa0729fdb>] fs_path_ensure_buf.part.12+0x6b/0x200 [btrfs] [ 5381.660601] [<ffffffffa072a208>] fs_path_prepare_for_add+0x98/0xb0 [btrfs] [ 5381.660615] [<ffffffffa072a2bc>] fs_path_add_path+0x2c/0x60 [btrfs] [ 5381.660628] [<ffffffffa072c55c>] get_cur_path+0x7c/0x1c0 [btrfs] Even without this loop, the incremental send couldn't succeed, because it would attempt to send a rename/move operation for the lower inode before the highest inode number was renamed/move. This issue is easy to trigger with the following steps: $ mkfs.btrfs -f /dev/sdb3 $ mount /dev/sdb3 /mnt/btrfs $ mkdir -p /mnt/btrfs/a/b/c/d $ mkdir /mnt/btrfs/a/b/c2 $ btrfs subvol snapshot -r /mnt/btrfs /mnt/btrfs/snap1 $ mv /mnt/btrfs/a/b/c/d /mnt/btrfs/a/b/c2/d2 $ mv /mnt/btrfs/a/b/c /mnt/btrfs/a/b/c2/d2/cc $ btrfs subvol snapshot -r /mnt/btrfs /mnt/btrfs/snap2 $ btrfs send -p /mnt/btrfs/snap1 /mnt/btrfs/snap2 > /tmp/incremental.send The structure of the filesystem when the first snapshot is taken is: . (ino 256) |-- a (ino 257) |-- b (ino 258) |-- c (ino 259) | |-- d (ino 260) | |-- c2 (ino 261) And its structure when the second snapshot is taken is: . (ino 256) |-- a (ino 257) |-- b (ino 258) |-- c2 (ino 261) |-- d2 (ino 260) |-- cc (ino 259) Before the move/rename operation is performed for the inode 259, the move/rename for inode 260 must be performed, since 259 is now a child of 260. A test case for xfstests, with a more complex scenario, will follow soon. Signed-off-by: Filipe David Borba Manana <fdmanana@gmail.com> Signed-off-by: Josef Bacik <jbacik@fb.com> Signed-off-by: Chris Mason <clm@fb.com>
2014-01-22 10:00:53 +00:00
Btrfs: part 2, fix incremental send's decision to delay a dir move/rename For an incremental send, fix the process of determining whether the directory inode we're currently processing needs to have its move/rename operation delayed. We were ignoring the fact that if the inode's new immediate ancestor has a higher inode number than ours but wasn't renamed/moved, we might still need to delay our move/rename, because some other ancestor directory higher in the hierarchy might have an inode number higher than ours *and* was renamed/moved too - in this case we have to wait for rename/move of that ancestor to happen before our current directory's rename/move operation. Simple steps to reproduce this issue: $ mkfs.btrfs -f /dev/sdd $ mount /dev/sdd /mnt $ mkdir -p /mnt/a/x1/x2 $ mkdir /mnt/a/Z $ mkdir -p /mnt/a/x1/x2/x3/x4/x5 $ btrfs subvolume snapshot -r /mnt /mnt/snap1 $ btrfs send /mnt/snap1 -f /tmp/base.send $ mv /mnt/a/x1/x2/x3 /mnt/a/Z/X33 $ mv /mnt/a/x1/x2 /mnt/a/Z/X33/x4/x5/X22 $ btrfs subvolume snapshot -r /mnt /mnt/snap2 $ btrfs send -p /mnt/snap1 /mnt/snap2 -f /tmp/incremental.send The incremental send caused the kernel code to enter an infinite loop when building the path string for directory Z after its references are processed. A more complex scenario: $ mkfs.btrfs -f /dev/sdd $ mount /dev/sdd /mnt $ mkdir -p /mnt/a/b/c/d $ mkdir /mnt/a/b/c/d/e $ mkdir /mnt/a/b/c/d/f $ mv /mnt/a/b/c/d/e /mnt/a/b/c/d/f/E2 $ mkdir /mmt/a/b/c/g $ mv /mnt/a/b/c/d /mnt/a/b/D2 $ btrfs subvolume snapshot -r /mnt /mnt/snap1 $ btrfs send /mnt/snap1 -f /tmp/base.send $ mkdir /mnt/a/o $ mv /mnt/a/b/c/g /mnt/a/b/D2/f/G2 $ mv /mnt/a/b/D2 /mnt/a/b/dd $ mv /mnt/a/b/c /mnt/a/C2 $ mv /mnt/a/b/dd/f /mnt/a/o/FF $ mv /mnt/a/b /mnt/a/o/FF/E2/BB $ btrfs subvolume snapshot -r /mnt /mnt/snap2 $ btrfs send -p /mnt/snap1 /mnt/snap2 -f /tmp/incremental.send A test case for xfstests follows. Signed-off-by: Filipe David Borba Manana <fdmanana@gmail.com> Signed-off-by: Chris Mason <clm@fb.com>
2014-03-19 14:20:54 +00:00
Btrfs: incremental send, don't rename a directory too soon There's one more case where we can't issue a rename operation for a directory as soon as we process it. We used to delay directory renames only if they have some ancestor directory with a higher inode number that got renamed too, but there's another case where we need to delay the rename too - when a directory A is renamed to the old name of a directory B but that directory B has its rename delayed because it has now (in the send root) an ancestor with a higher inode number that was renamed. If we don't delay the directory rename in this case, the receiving end of the send stream will attempt to rename A to the old name of B before B got renamed to its new name, which results in a "directory not empty" error. So fix this by delaying directory renames for this case too. Steps to reproduce: $ mkfs.btrfs -f /dev/sdb $ mount /dev/sdb /mnt $ mkdir /mnt/a $ mkdir /mnt/b $ mkdir /mnt/c $ touch /mnt/a/file $ btrfs subvolume snapshot -r /mnt /mnt/snap1 $ mv /mnt/c /mnt/x $ mv /mnt/a /mnt/x/y $ mv /mnt/b /mnt/a $ btrfs subvolume snapshot -r /mnt /mnt/snap2 $ btrfs send /mnt/snap1 -f /tmp/1.send $ btrfs send -p /mnt/snap1 /mnt/snap2 -f /tmp/2.send $ mkfs.btrfs -f /dev/sdc $ mount /dev/sdc /mnt2 $ btrfs receive /mnt2 -f /tmp/1.send $ btrfs receive /mnt2 -f /tmp/2.send ERROR: rename b -> a failed. Directory not empty A test case for xfstests follows soon. Reported-by: Ames Cornish <ames@cornishes.net> Signed-off-by: Filipe Manana <fdmanana@suse.com> Signed-off-by: Chris Mason <clm@fb.com>
2015-02-28 22:29:22 +00:00
Btrfs: fix infinite path build loops in incremental send The send operation processes inodes by their ascending number, and assumes that any rename/move operation can be successfully performed (sent to the caller) once all previous inodes (those with a smaller inode number than the one we're currently processing) were processed. This is not true when an incremental send had to process an hierarchical change between 2 snapshots where the parent-children relationship between directory inodes was reversed - that is, parents became children and children became parents. This situation made the path building code go into an infinite loop, which kept allocating more and more memory that eventually lead to a krealloc warning being displayed in dmesg: WARNING: CPU: 1 PID: 5705 at mm/page_alloc.c:2477 __alloc_pages_nodemask+0x365/0xad0() Modules linked in: btrfs raid6_pq xor pci_stub vboxpci(O) vboxnetadp(O) vboxnetflt(O) vboxdrv(O) snd_hda_codec_hdmi snd_hda_codec_realtek joydev radeon snd_hda_intel snd_hda_codec snd_hwdep snd_seq_midi snd_pcm psmouse i915 snd_rawmidi serio_raw snd_seq_midi_event lpc_ich snd_seq snd_timer ttm snd_seq_device rfcomm drm_kms_helper parport_pc bnep bluetooth drm ppdev snd soundcore i2c_algo_bit snd_page_alloc binfmt_misc video lp parport r8169 mii hid_generic usbhid hid CPU: 1 PID: 5705 Comm: btrfs Tainted: G O 3.13.0-rc7-fdm-btrfs-next-18+ #3 Hardware name: To Be Filled By O.E.M. To Be Filled By O.E.M./Z77 Pro4, BIOS P1.50 09/04/2012 [ 5381.660441] 00000000000009ad ffff8806f6f2f4e8 ffffffff81777434 0000000000000007 [ 5381.660447] 0000000000000000 ffff8806f6f2f528 ffffffff8104a9ec ffff8807038f36f0 [ 5381.660452] 0000000000000000 0000000000000206 ffff8807038f2490 ffff8807038f36f0 [ 5381.660457] Call Trace: [ 5381.660464] [<ffffffff81777434>] dump_stack+0x4e/0x68 [ 5381.660471] [<ffffffff8104a9ec>] warn_slowpath_common+0x8c/0xc0 [ 5381.660476] [<ffffffff8104aa3a>] warn_slowpath_null+0x1a/0x20 [ 5381.660480] [<ffffffff81144995>] __alloc_pages_nodemask+0x365/0xad0 [ 5381.660487] [<ffffffff8108313f>] ? local_clock+0x4f/0x60 [ 5381.660491] [<ffffffff811430e8>] ? free_one_page+0x98/0x440 [ 5381.660495] [<ffffffff8108313f>] ? local_clock+0x4f/0x60 [ 5381.660502] [<ffffffff8113fae4>] ? __get_free_pages+0x14/0x50 [ 5381.660508] [<ffffffff81095fb8>] ? trace_hardirqs_off_caller+0x28/0xd0 [ 5381.660515] [<ffffffff81183caf>] alloc_pages_current+0x10f/0x1f0 [ 5381.660520] [<ffffffff8113fae4>] ? __get_free_pages+0x14/0x50 [ 5381.660524] [<ffffffff8113fae4>] __get_free_pages+0x14/0x50 [ 5381.660530] [<ffffffff8115dace>] kmalloc_order_trace+0x3e/0x100 [ 5381.660536] [<ffffffff81191ea0>] __kmalloc_track_caller+0x220/0x230 [ 5381.660560] [<ffffffffa0729fdb>] ? fs_path_ensure_buf.part.12+0x6b/0x200 [btrfs] [ 5381.660564] [<ffffffff8178085c>] ? retint_restore_args+0xe/0xe [ 5381.660569] [<ffffffff811580ef>] krealloc+0x6f/0xb0 [ 5381.660586] [<ffffffffa0729fdb>] fs_path_ensure_buf.part.12+0x6b/0x200 [btrfs] [ 5381.660601] [<ffffffffa072a208>] fs_path_prepare_for_add+0x98/0xb0 [btrfs] [ 5381.660615] [<ffffffffa072a2bc>] fs_path_add_path+0x2c/0x60 [btrfs] [ 5381.660628] [<ffffffffa072c55c>] get_cur_path+0x7c/0x1c0 [btrfs] Even without this loop, the incremental send couldn't succeed, because it would attempt to send a rename/move operation for the lower inode before the highest inode number was renamed/move. This issue is easy to trigger with the following steps: $ mkfs.btrfs -f /dev/sdb3 $ mount /dev/sdb3 /mnt/btrfs $ mkdir -p /mnt/btrfs/a/b/c/d $ mkdir /mnt/btrfs/a/b/c2 $ btrfs subvol snapshot -r /mnt/btrfs /mnt/btrfs/snap1 $ mv /mnt/btrfs/a/b/c/d /mnt/btrfs/a/b/c2/d2 $ mv /mnt/btrfs/a/b/c /mnt/btrfs/a/b/c2/d2/cc $ btrfs subvol snapshot -r /mnt/btrfs /mnt/btrfs/snap2 $ btrfs send -p /mnt/btrfs/snap1 /mnt/btrfs/snap2 > /tmp/incremental.send The structure of the filesystem when the first snapshot is taken is: . (ino 256) |-- a (ino 257) |-- b (ino 258) |-- c (ino 259) | |-- d (ino 260) | |-- c2 (ino 261) And its structure when the second snapshot is taken is: . (ino 256) |-- a (ino 257) |-- b (ino 258) |-- c2 (ino 261) |-- d2 (ino 260) |-- cc (ino 259) Before the move/rename operation is performed for the inode 259, the move/rename for inode 260 must be performed, since 259 is now a child of 260. A test case for xfstests, with a more complex scenario, will follow soon. Signed-off-by: Filipe David Borba Manana <fdmanana@gmail.com> Signed-off-by: Josef Bacik <jbacik@fb.com> Signed-off-by: Chris Mason <clm@fb.com>
2014-01-22 10:00:53 +00:00
Btrfs: send, fix more issues related to directory renames This is a continuation of the previous changes titled: Btrfs: fix incremental send's decision to delay a dir move/rename Btrfs: part 2, fix incremental send's decision to delay a dir move/rename There's a few more cases where a directory rename/move must be delayed which was previously overlooked. If our immediate ancestor has a lower inode number than ours and it doesn't have a delayed rename/move operation associated to it, it doesn't mean there isn't any non-direct ancestor of our current inode that needs to be renamed/moved before our current inode (i.e. with a higher inode number than ours). So we can't stop the search if our immediate ancestor has a lower inode number than ours, we need to navigate the directory hierarchy upwards until we hit the root or: 1) find an ancestor with an higher inode number that was renamed/moved in the send root too (or already has a pending rename/move registered); 2) find an ancestor that is a new directory (higher inode number than ours and exists only in the send root). Reproducer for case 1) $ mkfs.btrfs -f /dev/sdd $ mount /dev/sdd /mnt $ mkdir -p /mnt/a/b $ mkdir -p /mnt/a/c/d $ mkdir /mnt/a/b/e $ mkdir /mnt/a/c/d/f $ mv /mnt/a/b /mnt/a/c/d/2b $ mkdir /mnt/a/x $ mkdir /mnt/a/y $ btrfs subvolume snapshot -r /mnt /mnt/snap1 $ btrfs send /mnt/snap1 -f /tmp/base.send $ mv /mnt/a/x /mnt/a/y $ mv /mnt/a/c/d/2b/e /mnt/a/c/d/2b/2e $ mv /mnt/a/c/d /mnt/a/h/2d $ mv /mnt/a/c /mnt/a/h/2d/2b/2c $ btrfs subvolume snapshot -r /mnt /mnt/snap2 $ btrfs send -p /mnt/snap1 /mnt/snap2 -f /tmp/incremental.send Simple reproducer for case 2) $ mkfs.btrfs -f /dev/sdd $ mount /dev/sdd /mnt $ mkdir -p /mnt/a/b $ mkdir /mnt/a/c $ mv /mnt/a/b /mnt/a/c/b2 $ mkdir /mnt/a/e $ btrfs subvolume snapshot -r /mnt /mnt/snap1 $ btrfs send /mnt/snap1 -f /tmp/base.send $ mv /mnt/a/c/b2 /mnt/a/e/b3 $ mkdir /mnt/a/e/b3/f $ mkdir /mnt/a/h $ mv /mnt/a/c /mnt/a/e/b3/f/c2 $ mv /mnt/a/e /mnt/a/h/e2 $ btrfs subvolume snapshot -r /mnt /mnt/snap2 $ btrfs send -p /mnt/snap1 /mnt/snap2 -f /tmp/incremental.send Another simple reproducer for case 2) $ mkfs.btrfs -f /dev/sdd $ mount /dev/sdd /mnt $ mkdir -p /mnt/a/b $ mkdir /mnt/a/c $ mkdir /mnt/a/b/d $ mkdir /mnt/a/c/e $ btrfs subvolume snapshot -r /mnt /mnt/snap1 $ btrfs send /mnt/snap1 -f /tmp/base.send $ mkdir /mnt/a/b/d/f $ mkdir /mnt/a/b/g $ mv /mnt/a/c/e /mnt/a/b/g/e2 $ mv /mnt/a/c /mnt/a/b/d/f/c2 $ mv /mnt/a/b/d/f /mnt/a/b/g/e2/f2 $ btrfs subvolume snapshot -r /mnt /mnt/snap2 $ btrfs send -p /mnt/snap1 /mnt/snap2 -f /tmp/incremental.send More complex reproducer for case 2) $ mkfs.btrfs -f /dev/sdd $ mount /dev/sdd /mnt $ mkdir -p /mnt/a/b $ mkdir -p /mnt/a/c/d $ mkdir /mnt/a/b/e $ mkdir /mnt/a/c/d/f $ mv /mnt/a/b /mnt/a/c/d/2b $ mkdir /mnt/a/x $ mkdir /mnt/a/y $ btrfs subvolume snapshot -r /mnt /mnt/snap1 $ btrfs send /mnt/snap1 -f /tmp/base.send $ mv /mnt/a/x /mnt/a/y $ mv /mnt/a/c/d/2b/e /mnt/a/c/d/2b/2e $ mv /mnt/a/c/d /mnt/a/h/2d $ mv /mnt/a/c /mnt/a/h/2d/2b/2c $ btrfs subvolume snapshot -r /mnt /mnt/snap2 $ btrfs send -p /mnt/snap1 /mnt/snap2 -f /tmp/incremental.send For both cases the incremental send would enter an infinite loop when building path strings. While solving these cases, this change also re-implements the code to detect when directory moves/renames should be delayed. Instead of dealing with several specific cases separately, it's now more generic handling all cases with a simple detection algorithm and if when applying a delayed move/rename there's a path loop detected, it further delays the move/rename registering a new ancestor inode as the dependency inode (so our rename happens after that ancestor is renamed). Tests for these cases is being added to xfstests too. Signed-off-by: Filipe David Borba Manana <fdmanana@gmail.com> Signed-off-by: Chris Mason <clm@fb.com>
2014-03-27 20:14:01 +00:00
Btrfs: fix infinite path build loops in incremental send The send operation processes inodes by their ascending number, and assumes that any rename/move operation can be successfully performed (sent to the caller) once all previous inodes (those with a smaller inode number than the one we're currently processing) were processed. This is not true when an incremental send had to process an hierarchical change between 2 snapshots where the parent-children relationship between directory inodes was reversed - that is, parents became children and children became parents. This situation made the path building code go into an infinite loop, which kept allocating more and more memory that eventually lead to a krealloc warning being displayed in dmesg: WARNING: CPU: 1 PID: 5705 at mm/page_alloc.c:2477 __alloc_pages_nodemask+0x365/0xad0() Modules linked in: btrfs raid6_pq xor pci_stub vboxpci(O) vboxnetadp(O) vboxnetflt(O) vboxdrv(O) snd_hda_codec_hdmi snd_hda_codec_realtek joydev radeon snd_hda_intel snd_hda_codec snd_hwdep snd_seq_midi snd_pcm psmouse i915 snd_rawmidi serio_raw snd_seq_midi_event lpc_ich snd_seq snd_timer ttm snd_seq_device rfcomm drm_kms_helper parport_pc bnep bluetooth drm ppdev snd soundcore i2c_algo_bit snd_page_alloc binfmt_misc video lp parport r8169 mii hid_generic usbhid hid CPU: 1 PID: 5705 Comm: btrfs Tainted: G O 3.13.0-rc7-fdm-btrfs-next-18+ #3 Hardware name: To Be Filled By O.E.M. To Be Filled By O.E.M./Z77 Pro4, BIOS P1.50 09/04/2012 [ 5381.660441] 00000000000009ad ffff8806f6f2f4e8 ffffffff81777434 0000000000000007 [ 5381.660447] 0000000000000000 ffff8806f6f2f528 ffffffff8104a9ec ffff8807038f36f0 [ 5381.660452] 0000000000000000 0000000000000206 ffff8807038f2490 ffff8807038f36f0 [ 5381.660457] Call Trace: [ 5381.660464] [<ffffffff81777434>] dump_stack+0x4e/0x68 [ 5381.660471] [<ffffffff8104a9ec>] warn_slowpath_common+0x8c/0xc0 [ 5381.660476] [<ffffffff8104aa3a>] warn_slowpath_null+0x1a/0x20 [ 5381.660480] [<ffffffff81144995>] __alloc_pages_nodemask+0x365/0xad0 [ 5381.660487] [<ffffffff8108313f>] ? local_clock+0x4f/0x60 [ 5381.660491] [<ffffffff811430e8>] ? free_one_page+0x98/0x440 [ 5381.660495] [<ffffffff8108313f>] ? local_clock+0x4f/0x60 [ 5381.660502] [<ffffffff8113fae4>] ? __get_free_pages+0x14/0x50 [ 5381.660508] [<ffffffff81095fb8>] ? trace_hardirqs_off_caller+0x28/0xd0 [ 5381.660515] [<ffffffff81183caf>] alloc_pages_current+0x10f/0x1f0 [ 5381.660520] [<ffffffff8113fae4>] ? __get_free_pages+0x14/0x50 [ 5381.660524] [<ffffffff8113fae4>] __get_free_pages+0x14/0x50 [ 5381.660530] [<ffffffff8115dace>] kmalloc_order_trace+0x3e/0x100 [ 5381.660536] [<ffffffff81191ea0>] __kmalloc_track_caller+0x220/0x230 [ 5381.660560] [<ffffffffa0729fdb>] ? fs_path_ensure_buf.part.12+0x6b/0x200 [btrfs] [ 5381.660564] [<ffffffff8178085c>] ? retint_restore_args+0xe/0xe [ 5381.660569] [<ffffffff811580ef>] krealloc+0x6f/0xb0 [ 5381.660586] [<ffffffffa0729fdb>] fs_path_ensure_buf.part.12+0x6b/0x200 [btrfs] [ 5381.660601] [<ffffffffa072a208>] fs_path_prepare_for_add+0x98/0xb0 [btrfs] [ 5381.660615] [<ffffffffa072a2bc>] fs_path_add_path+0x2c/0x60 [btrfs] [ 5381.660628] [<ffffffffa072c55c>] get_cur_path+0x7c/0x1c0 [btrfs] Even without this loop, the incremental send couldn't succeed, because it would attempt to send a rename/move operation for the lower inode before the highest inode number was renamed/move. This issue is easy to trigger with the following steps: $ mkfs.btrfs -f /dev/sdb3 $ mount /dev/sdb3 /mnt/btrfs $ mkdir -p /mnt/btrfs/a/b/c/d $ mkdir /mnt/btrfs/a/b/c2 $ btrfs subvol snapshot -r /mnt/btrfs /mnt/btrfs/snap1 $ mv /mnt/btrfs/a/b/c/d /mnt/btrfs/a/b/c2/d2 $ mv /mnt/btrfs/a/b/c /mnt/btrfs/a/b/c2/d2/cc $ btrfs subvol snapshot -r /mnt/btrfs /mnt/btrfs/snap2 $ btrfs send -p /mnt/btrfs/snap1 /mnt/btrfs/snap2 > /tmp/incremental.send The structure of the filesystem when the first snapshot is taken is: . (ino 256) |-- a (ino 257) |-- b (ino 258) |-- c (ino 259) | |-- d (ino 260) | |-- c2 (ino 261) And its structure when the second snapshot is taken is: . (ino 256) |-- a (ino 257) |-- b (ino 258) |-- c2 (ino 261) |-- d2 (ino 260) |-- cc (ino 259) Before the move/rename operation is performed for the inode 259, the move/rename for inode 260 must be performed, since 259 is now a child of 260. A test case for xfstests, with a more complex scenario, will follow soon. Signed-off-by: Filipe David Borba Manana <fdmanana@gmail.com> Signed-off-by: Josef Bacik <jbacik@fb.com> Signed-off-by: Chris Mason <clm@fb.com>
2014-01-22 10:00:53 +00:00
Btrfs: send, fix more issues related to directory renames This is a continuation of the previous changes titled: Btrfs: fix incremental send's decision to delay a dir move/rename Btrfs: part 2, fix incremental send's decision to delay a dir move/rename There's a few more cases where a directory rename/move must be delayed which was previously overlooked. If our immediate ancestor has a lower inode number than ours and it doesn't have a delayed rename/move operation associated to it, it doesn't mean there isn't any non-direct ancestor of our current inode that needs to be renamed/moved before our current inode (i.e. with a higher inode number than ours). So we can't stop the search if our immediate ancestor has a lower inode number than ours, we need to navigate the directory hierarchy upwards until we hit the root or: 1) find an ancestor with an higher inode number that was renamed/moved in the send root too (or already has a pending rename/move registered); 2) find an ancestor that is a new directory (higher inode number than ours and exists only in the send root). Reproducer for case 1) $ mkfs.btrfs -f /dev/sdd $ mount /dev/sdd /mnt $ mkdir -p /mnt/a/b $ mkdir -p /mnt/a/c/d $ mkdir /mnt/a/b/e $ mkdir /mnt/a/c/d/f $ mv /mnt/a/b /mnt/a/c/d/2b $ mkdir /mnt/a/x $ mkdir /mnt/a/y $ btrfs subvolume snapshot -r /mnt /mnt/snap1 $ btrfs send /mnt/snap1 -f /tmp/base.send $ mv /mnt/a/x /mnt/a/y $ mv /mnt/a/c/d/2b/e /mnt/a/c/d/2b/2e $ mv /mnt/a/c/d /mnt/a/h/2d $ mv /mnt/a/c /mnt/a/h/2d/2b/2c $ btrfs subvolume snapshot -r /mnt /mnt/snap2 $ btrfs send -p /mnt/snap1 /mnt/snap2 -f /tmp/incremental.send Simple reproducer for case 2) $ mkfs.btrfs -f /dev/sdd $ mount /dev/sdd /mnt $ mkdir -p /mnt/a/b $ mkdir /mnt/a/c $ mv /mnt/a/b /mnt/a/c/b2 $ mkdir /mnt/a/e $ btrfs subvolume snapshot -r /mnt /mnt/snap1 $ btrfs send /mnt/snap1 -f /tmp/base.send $ mv /mnt/a/c/b2 /mnt/a/e/b3 $ mkdir /mnt/a/e/b3/f $ mkdir /mnt/a/h $ mv /mnt/a/c /mnt/a/e/b3/f/c2 $ mv /mnt/a/e /mnt/a/h/e2 $ btrfs subvolume snapshot -r /mnt /mnt/snap2 $ btrfs send -p /mnt/snap1 /mnt/snap2 -f /tmp/incremental.send Another simple reproducer for case 2) $ mkfs.btrfs -f /dev/sdd $ mount /dev/sdd /mnt $ mkdir -p /mnt/a/b $ mkdir /mnt/a/c $ mkdir /mnt/a/b/d $ mkdir /mnt/a/c/e $ btrfs subvolume snapshot -r /mnt /mnt/snap1 $ btrfs send /mnt/snap1 -f /tmp/base.send $ mkdir /mnt/a/b/d/f $ mkdir /mnt/a/b/g $ mv /mnt/a/c/e /mnt/a/b/g/e2 $ mv /mnt/a/c /mnt/a/b/d/f/c2 $ mv /mnt/a/b/d/f /mnt/a/b/g/e2/f2 $ btrfs subvolume snapshot -r /mnt /mnt/snap2 $ btrfs send -p /mnt/snap1 /mnt/snap2 -f /tmp/incremental.send More complex reproducer for case 2) $ mkfs.btrfs -f /dev/sdd $ mount /dev/sdd /mnt $ mkdir -p /mnt/a/b $ mkdir -p /mnt/a/c/d $ mkdir /mnt/a/b/e $ mkdir /mnt/a/c/d/f $ mv /mnt/a/b /mnt/a/c/d/2b $ mkdir /mnt/a/x $ mkdir /mnt/a/y $ btrfs subvolume snapshot -r /mnt /mnt/snap1 $ btrfs send /mnt/snap1 -f /tmp/base.send $ mv /mnt/a/x /mnt/a/y $ mv /mnt/a/c/d/2b/e /mnt/a/c/d/2b/2e $ mv /mnt/a/c/d /mnt/a/h/2d $ mv /mnt/a/c /mnt/a/h/2d/2b/2c $ btrfs subvolume snapshot -r /mnt /mnt/snap2 $ btrfs send -p /mnt/snap1 /mnt/snap2 -f /tmp/incremental.send For both cases the incremental send would enter an infinite loop when building path strings. While solving these cases, this change also re-implements the code to detect when directory moves/renames should be delayed. Instead of dealing with several specific cases separately, it's now more generic handling all cases with a simple detection algorithm and if when applying a delayed move/rename there's a path loop detected, it further delays the move/rename registering a new ancestor inode as the dependency inode (so our rename happens after that ancestor is renamed). Tests for these cases is being added to xfstests too. Signed-off-by: Filipe David Borba Manana <fdmanana@gmail.com> Signed-off-by: Chris Mason <clm@fb.com>
2014-03-27 20:14:01 +00:00
Btrfs: fix infinite path build loops in incremental send The send operation processes inodes by their ascending number, and assumes that any rename/move operation can be successfully performed (sent to the caller) once all previous inodes (those with a smaller inode number than the one we're currently processing) were processed. This is not true when an incremental send had to process an hierarchical change between 2 snapshots where the parent-children relationship between directory inodes was reversed - that is, parents became children and children became parents. This situation made the path building code go into an infinite loop, which kept allocating more and more memory that eventually lead to a krealloc warning being displayed in dmesg: WARNING: CPU: 1 PID: 5705 at mm/page_alloc.c:2477 __alloc_pages_nodemask+0x365/0xad0() Modules linked in: btrfs raid6_pq xor pci_stub vboxpci(O) vboxnetadp(O) vboxnetflt(O) vboxdrv(O) snd_hda_codec_hdmi snd_hda_codec_realtek joydev radeon snd_hda_intel snd_hda_codec snd_hwdep snd_seq_midi snd_pcm psmouse i915 snd_rawmidi serio_raw snd_seq_midi_event lpc_ich snd_seq snd_timer ttm snd_seq_device rfcomm drm_kms_helper parport_pc bnep bluetooth drm ppdev snd soundcore i2c_algo_bit snd_page_alloc binfmt_misc video lp parport r8169 mii hid_generic usbhid hid CPU: 1 PID: 5705 Comm: btrfs Tainted: G O 3.13.0-rc7-fdm-btrfs-next-18+ #3 Hardware name: To Be Filled By O.E.M. To Be Filled By O.E.M./Z77 Pro4, BIOS P1.50 09/04/2012 [ 5381.660441] 00000000000009ad ffff8806f6f2f4e8 ffffffff81777434 0000000000000007 [ 5381.660447] 0000000000000000 ffff8806f6f2f528 ffffffff8104a9ec ffff8807038f36f0 [ 5381.660452] 0000000000000000 0000000000000206 ffff8807038f2490 ffff8807038f36f0 [ 5381.660457] Call Trace: [ 5381.660464] [<ffffffff81777434>] dump_stack+0x4e/0x68 [ 5381.660471] [<ffffffff8104a9ec>] warn_slowpath_common+0x8c/0xc0 [ 5381.660476] [<ffffffff8104aa3a>] warn_slowpath_null+0x1a/0x20 [ 5381.660480] [<ffffffff81144995>] __alloc_pages_nodemask+0x365/0xad0 [ 5381.660487] [<ffffffff8108313f>] ? local_clock+0x4f/0x60 [ 5381.660491] [<ffffffff811430e8>] ? free_one_page+0x98/0x440 [ 5381.660495] [<ffffffff8108313f>] ? local_clock+0x4f/0x60 [ 5381.660502] [<ffffffff8113fae4>] ? __get_free_pages+0x14/0x50 [ 5381.660508] [<ffffffff81095fb8>] ? trace_hardirqs_off_caller+0x28/0xd0 [ 5381.660515] [<ffffffff81183caf>] alloc_pages_current+0x10f/0x1f0 [ 5381.660520] [<ffffffff8113fae4>] ? __get_free_pages+0x14/0x50 [ 5381.660524] [<ffffffff8113fae4>] __get_free_pages+0x14/0x50 [ 5381.660530] [<ffffffff8115dace>] kmalloc_order_trace+0x3e/0x100 [ 5381.660536] [<ffffffff81191ea0>] __kmalloc_track_caller+0x220/0x230 [ 5381.660560] [<ffffffffa0729fdb>] ? fs_path_ensure_buf.part.12+0x6b/0x200 [btrfs] [ 5381.660564] [<ffffffff8178085c>] ? retint_restore_args+0xe/0xe [ 5381.660569] [<ffffffff811580ef>] krealloc+0x6f/0xb0 [ 5381.660586] [<ffffffffa0729fdb>] fs_path_ensure_buf.part.12+0x6b/0x200 [btrfs] [ 5381.660601] [<ffffffffa072a208>] fs_path_prepare_for_add+0x98/0xb0 [btrfs] [ 5381.660615] [<ffffffffa072a2bc>] fs_path_add_path+0x2c/0x60 [btrfs] [ 5381.660628] [<ffffffffa072c55c>] get_cur_path+0x7c/0x1c0 [btrfs] Even without this loop, the incremental send couldn't succeed, because it would attempt to send a rename/move operation for the lower inode before the highest inode number was renamed/move. This issue is easy to trigger with the following steps: $ mkfs.btrfs -f /dev/sdb3 $ mount /dev/sdb3 /mnt/btrfs $ mkdir -p /mnt/btrfs/a/b/c/d $ mkdir /mnt/btrfs/a/b/c2 $ btrfs subvol snapshot -r /mnt/btrfs /mnt/btrfs/snap1 $ mv /mnt/btrfs/a/b/c/d /mnt/btrfs/a/b/c2/d2 $ mv /mnt/btrfs/a/b/c /mnt/btrfs/a/b/c2/d2/cc $ btrfs subvol snapshot -r /mnt/btrfs /mnt/btrfs/snap2 $ btrfs send -p /mnt/btrfs/snap1 /mnt/btrfs/snap2 > /tmp/incremental.send The structure of the filesystem when the first snapshot is taken is: . (ino 256) |-- a (ino 257) |-- b (ino 258) |-- c (ino 259) | |-- d (ino 260) | |-- c2 (ino 261) And its structure when the second snapshot is taken is: . (ino 256) |-- a (ino 257) |-- b (ino 258) |-- c2 (ino 261) |-- d2 (ino 260) |-- cc (ino 259) Before the move/rename operation is performed for the inode 259, the move/rename for inode 260 must be performed, since 259 is now a child of 260. A test case for xfstests, with a more complex scenario, will follow soon. Signed-off-by: Filipe David Borba Manana <fdmanana@gmail.com> Signed-off-by: Josef Bacik <jbacik@fb.com> Signed-off-by: Chris Mason <clm@fb.com>
2014-01-22 10:00:53 +00:00
Btrfs: incremental send, check if orphanized dir inode needs delayed rename If a directory inode is orphanized, because some inode previously processed has a new name that collides with the old name of the current inode, we need to check if it needs its rename operation delayed too, as its ancestor-descendent relationship with some other inode might have been reversed between the parent and send snapshots and therefore its rename operation needs to happen after that other inode is renamed. For example, for the following reproducer where this is needed (provided by Robbie Ko): $ mkfs.btrfs -f /dev/sdb $ mount /dev/sdb /mnt $ mkfs.btrfs -f /dev/sdc $ mount /dev/sdc /mnt2 $ mkdir -p /mnt/data/n1/n2 $ mkdir /mnt/data/n4 $ mkdir -p /mnt/data/t6/t7 $ mkdir /mnt/data/t5 $ mkdir /mnt/data/t7 $ mkdir /mnt/data/n4/t2 $ mkdir /mnt/data/t4 $ mkdir /mnt/data/t3 $ mv /mnt/data/t7 /mnt/data/n4/t2 $ mv /mnt/data/t4 /mnt/data/n4/t2/t7 $ mv /mnt/data/t5 /mnt/data/n4/t2/t7/t4 $ mv /mnt/data/t6 /mnt/data/n4/t2/t7/t4/t5 $ mv /mnt/data/n1/n2 /mnt/data/n4/t2/t7/t4/t5/t6 $ mv /mnt/data/n1 /mnt/data/n4/t2/t7/t4/t5/t6 $ mv /mnt/data/n4/t2/t7/t4/t5/t6/t7 /mnt/data/n4/t2/t7/t4/t5/t6/n2 $ mv /mnt/data/t3 /mnt/data/n4/t2/t7/t4/t5/t6/n2/t7 $ btrfs subvolume snapshot -r /mnt /mnt/snap1 $ mv /mnt/data/n4/t2/t7/t4/t5/t6/n1 /mnt/data/n4 $ mv /mnt/data/n4/t2 /mnt/data/n4/n1 $ mv /mnt/data/n4/n1/t2/t7/t4/t5/t6/n2 /mnt/data/n4/n1/t2 $ mv /mnt/data/n4/n1/t2/n2/t7/t3 /mnt/data/n4/n1/t2 $ mv /mnt/data/n4/n1/t2/t7/t4/t5/t6 /mnt/data/n4/n1/t2 $ mv /mnt/data/n4/n1/t2/t7/t4 /mnt/data/n4/n1/t2/t6 $ mv /mnt/data/n4/n1/t2/t7 /mnt/data/n4/n1/t2/t3 $ mv /mnt/data/n4/n1/t2/n2/t7 /mnt/data/n4/n1/t2 $ btrfs subvolume snapshot -r /mnt /mnt/snap2 $ btrfs send /mnt/snap1 | btrfs receive /mnt2 $ btrfs send -p /mnt/snap1 /mnt/snap2 | btrfs receive /mnt2 ERROR: send ioctl failed with -12: Cannot allocate memory Where the parent snapshot directory hierarchy is the following: . (ino 256) |-- data/ (ino 257) |-- n4/ (ino 260) |-- t2/ (ino 265) |-- t7/ (ino 264) |-- t4/ (ino 266) |-- t5/ (ino 263) |-- t6/ (ino 261) |-- n1/ (ino 258) |-- n2/ (ino 259) |-- t7/ (ino 262) |-- t3/ (ino 267) And the send snapshot's directory hierarchy is the following: . (ino 256) |-- data/ (ino 257) |-- n4/ (ino 260) |-- n1/ (ino 258) |-- t2/ (ino 265) |-- n2/ (ino 259) |-- t3/ (ino 267) | |-- t7 (ino 264) | |-- t6/ (ino 261) | |-- t4/ (ino 266) | |-- t5/ (ino 263) | |-- t7/ (ino 262) While processing inode 262 we orphanize inode 264 and later attempt to rename inode 264 to its new name/location, which resulted in building an incorrect destination path string for the rename operation with the value "data/n4/t2/t7/t4/t5/t6/n2/t7/t3/t7". This rename operation must have been done only after inode 267 is processed and renamed, as the ancestor-descendent relationship between inodes 264 and 267 was reversed between both snapshots, because otherwise it results in an infinite loop when building the path string for inode 264 when we are processing an inode with a number larger than 264. That loop is the following: start inode 264, send progress of 265 for example parent of 264 -> 267 parent of 267 -> 262 parent of 262 -> 259 parent of 259 -> 261 parent of 261 -> 263 parent of 263 -> 266 parent of 266 -> 264 |--> back to first iteration while current path string length is <= PATH_MAX, and fail with -ENOMEM otherwise So fix this by making the check if we need to delay a directory rename regardless of the current inode having been orphanized or not. A test case for fstests follows soon. Thanks to Robbie Ko for providing a reproducer for this problem. Reported-by: Robbie Ko <robbieko@synology.com> Signed-off-by: Filipe Manana <fdmanana@suse.com>
2015-04-09 14:09:14 +01:00
Btrfs: fix infinite path build loops in incremental send The send operation processes inodes by their ascending number, and assumes that any rename/move operation can be successfully performed (sent to the caller) once all previous inodes (those with a smaller inode number than the one we're currently processing) were processed. This is not true when an incremental send had to process an hierarchical change between 2 snapshots where the parent-children relationship between directory inodes was reversed - that is, parents became children and children became parents. This situation made the path building code go into an infinite loop, which kept allocating more and more memory that eventually lead to a krealloc warning being displayed in dmesg: WARNING: CPU: 1 PID: 5705 at mm/page_alloc.c:2477 __alloc_pages_nodemask+0x365/0xad0() Modules linked in: btrfs raid6_pq xor pci_stub vboxpci(O) vboxnetadp(O) vboxnetflt(O) vboxdrv(O) snd_hda_codec_hdmi snd_hda_codec_realtek joydev radeon snd_hda_intel snd_hda_codec snd_hwdep snd_seq_midi snd_pcm psmouse i915 snd_rawmidi serio_raw snd_seq_midi_event lpc_ich snd_seq snd_timer ttm snd_seq_device rfcomm drm_kms_helper parport_pc bnep bluetooth drm ppdev snd soundcore i2c_algo_bit snd_page_alloc binfmt_misc video lp parport r8169 mii hid_generic usbhid hid CPU: 1 PID: 5705 Comm: btrfs Tainted: G O 3.13.0-rc7-fdm-btrfs-next-18+ #3 Hardware name: To Be Filled By O.E.M. To Be Filled By O.E.M./Z77 Pro4, BIOS P1.50 09/04/2012 [ 5381.660441] 00000000000009ad ffff8806f6f2f4e8 ffffffff81777434 0000000000000007 [ 5381.660447] 0000000000000000 ffff8806f6f2f528 ffffffff8104a9ec ffff8807038f36f0 [ 5381.660452] 0000000000000000 0000000000000206 ffff8807038f2490 ffff8807038f36f0 [ 5381.660457] Call Trace: [ 5381.660464] [<ffffffff81777434>] dump_stack+0x4e/0x68 [ 5381.660471] [<ffffffff8104a9ec>] warn_slowpath_common+0x8c/0xc0 [ 5381.660476] [<ffffffff8104aa3a>] warn_slowpath_null+0x1a/0x20 [ 5381.660480] [<ffffffff81144995>] __alloc_pages_nodemask+0x365/0xad0 [ 5381.660487] [<ffffffff8108313f>] ? local_clock+0x4f/0x60 [ 5381.660491] [<ffffffff811430e8>] ? free_one_page+0x98/0x440 [ 5381.660495] [<ffffffff8108313f>] ? local_clock+0x4f/0x60 [ 5381.660502] [<ffffffff8113fae4>] ? __get_free_pages+0x14/0x50 [ 5381.660508] [<ffffffff81095fb8>] ? trace_hardirqs_off_caller+0x28/0xd0 [ 5381.660515] [<ffffffff81183caf>] alloc_pages_current+0x10f/0x1f0 [ 5381.660520] [<ffffffff8113fae4>] ? __get_free_pages+0x14/0x50 [ 5381.660524] [<ffffffff8113fae4>] __get_free_pages+0x14/0x50 [ 5381.660530] [<ffffffff8115dace>] kmalloc_order_trace+0x3e/0x100 [ 5381.660536] [<ffffffff81191ea0>] __kmalloc_track_caller+0x220/0x230 [ 5381.660560] [<ffffffffa0729fdb>] ? fs_path_ensure_buf.part.12+0x6b/0x200 [btrfs] [ 5381.660564] [<ffffffff8178085c>] ? retint_restore_args+0xe/0xe [ 5381.660569] [<ffffffff811580ef>] krealloc+0x6f/0xb0 [ 5381.660586] [<ffffffffa0729fdb>] fs_path_ensure_buf.part.12+0x6b/0x200 [btrfs] [ 5381.660601] [<ffffffffa072a208>] fs_path_prepare_for_add+0x98/0xb0 [btrfs] [ 5381.660615] [<ffffffffa072a2bc>] fs_path_add_path+0x2c/0x60 [btrfs] [ 5381.660628] [<ffffffffa072c55c>] get_cur_path+0x7c/0x1c0 [btrfs] Even without this loop, the incremental send couldn't succeed, because it would attempt to send a rename/move operation for the lower inode before the highest inode number was renamed/move. This issue is easy to trigger with the following steps: $ mkfs.btrfs -f /dev/sdb3 $ mount /dev/sdb3 /mnt/btrfs $ mkdir -p /mnt/btrfs/a/b/c/d $ mkdir /mnt/btrfs/a/b/c2 $ btrfs subvol snapshot -r /mnt/btrfs /mnt/btrfs/snap1 $ mv /mnt/btrfs/a/b/c/d /mnt/btrfs/a/b/c2/d2 $ mv /mnt/btrfs/a/b/c /mnt/btrfs/a/b/c2/d2/cc $ btrfs subvol snapshot -r /mnt/btrfs /mnt/btrfs/snap2 $ btrfs send -p /mnt/btrfs/snap1 /mnt/btrfs/snap2 > /tmp/incremental.send The structure of the filesystem when the first snapshot is taken is: . (ino 256) |-- a (ino 257) |-- b (ino 258) |-- c (ino 259) | |-- d (ino 260) | |-- c2 (ino 261) And its structure when the second snapshot is taken is: . (ino 256) |-- a (ino 257) |-- b (ino 258) |-- c2 (ino 261) |-- d2 (ino 260) |-- cc (ino 259) Before the move/rename operation is performed for the inode 259, the move/rename for inode 260 must be performed, since 259 is now a child of 260. A test case for xfstests, with a more complex scenario, will follow soon. Signed-off-by: Filipe David Borba Manana <fdmanana@gmail.com> Signed-off-by: Josef Bacik <jbacik@fb.com> Signed-off-by: Chris Mason <clm@fb.com>
2014-01-22 10:00:53 +00:00
Btrfs: incremental send, fix invalid path after dir rename This fixes yet one more case not caught by the commit titled: Btrfs: fix infinite path build loops in incremental send In this case, even before the initial full send, we have a directory which is a child of a directory with a higher inode number. Then we perform the initial send, and after we rename both the child and the parent, without moving them around. After doing these 2 renames, an incremental send sent a rename instruction for the child directory which contained an invalid "from" path (referenced the parent's old name, not the new one), which made the btrfs receive command fail. Steps to reproduce: $ mkfs.btrfs -f /dev/sdb3 $ mount /dev/sdb3 /mnt/btrfs $ mkdir -p /mnt/btrfs/a/b $ mkdir /mnt/btrfs/d $ mkdir /mnt/btrfs/a/b/c $ mv /mnt/btrfs/d /mnt/btrfs/a/b/c $ btrfs subvolume snapshot -r /mnt/btrfs /mnt/btrfs/snap1 $ btrfs send /mnt/btrfs/snap1 -f /tmp/base.send $ mv /mnt/btrfs/a/b/c /mnt/btrfs/a/b/x $ mv /mnt/btrfs/a/b/x/d /mnt/btrfs/a/b/x/y $ btrfs subvolume snapshot -r /mnt/btrfs /mnt/btrfs/snap2 $ btrfs send -p /mnt/btrfs/snap1 /mnt/btrfs/snap2 -f /tmp/incremental.send $ umout /mnt/btrfs $ mkfs.btrfs -f /dev/sdb3 $ mount /dev/sdb3 /mnt/btrfs $ btrfs receive /mnt/btrfs -f /tmp/base.send $ btrfs receive /mnt/btrfs -f /tmp/incremental.send The second btrfs receive command failed with: "ERROR: rename a/b/c/d -> a/b/x/y failed. No such file or directory" A test case for xfstests follows. Signed-off-by: Filipe David Borba Manana <fdmanana@gmail.com> Signed-off-by: Josef Bacik <jbacik@fb.com>
2014-02-16 13:43:11 +00:00
Btrfs: fix infinite path build loops in incremental send The send operation processes inodes by their ascending number, and assumes that any rename/move operation can be successfully performed (sent to the caller) once all previous inodes (those with a smaller inode number than the one we're currently processing) were processed. This is not true when an incremental send had to process an hierarchical change between 2 snapshots where the parent-children relationship between directory inodes was reversed - that is, parents became children and children became parents. This situation made the path building code go into an infinite loop, which kept allocating more and more memory that eventually lead to a krealloc warning being displayed in dmesg: WARNING: CPU: 1 PID: 5705 at mm/page_alloc.c:2477 __alloc_pages_nodemask+0x365/0xad0() Modules linked in: btrfs raid6_pq xor pci_stub vboxpci(O) vboxnetadp(O) vboxnetflt(O) vboxdrv(O) snd_hda_codec_hdmi snd_hda_codec_realtek joydev radeon snd_hda_intel snd_hda_codec snd_hwdep snd_seq_midi snd_pcm psmouse i915 snd_rawmidi serio_raw snd_seq_midi_event lpc_ich snd_seq snd_timer ttm snd_seq_device rfcomm drm_kms_helper parport_pc bnep bluetooth drm ppdev snd soundcore i2c_algo_bit snd_page_alloc binfmt_misc video lp parport r8169 mii hid_generic usbhid hid CPU: 1 PID: 5705 Comm: btrfs Tainted: G O 3.13.0-rc7-fdm-btrfs-next-18+ #3 Hardware name: To Be Filled By O.E.M. To Be Filled By O.E.M./Z77 Pro4, BIOS P1.50 09/04/2012 [ 5381.660441] 00000000000009ad ffff8806f6f2f4e8 ffffffff81777434 0000000000000007 [ 5381.660447] 0000000000000000 ffff8806f6f2f528 ffffffff8104a9ec ffff8807038f36f0 [ 5381.660452] 0000000000000000 0000000000000206 ffff8807038f2490 ffff8807038f36f0 [ 5381.660457] Call Trace: [ 5381.660464] [<ffffffff81777434>] dump_stack+0x4e/0x68 [ 5381.660471] [<ffffffff8104a9ec>] warn_slowpath_common+0x8c/0xc0 [ 5381.660476] [<ffffffff8104aa3a>] warn_slowpath_null+0x1a/0x20 [ 5381.660480] [<ffffffff81144995>] __alloc_pages_nodemask+0x365/0xad0 [ 5381.660487] [<ffffffff8108313f>] ? local_clock+0x4f/0x60 [ 5381.660491] [<ffffffff811430e8>] ? free_one_page+0x98/0x440 [ 5381.660495] [<ffffffff8108313f>] ? local_clock+0x4f/0x60 [ 5381.660502] [<ffffffff8113fae4>] ? __get_free_pages+0x14/0x50 [ 5381.660508] [<ffffffff81095fb8>] ? trace_hardirqs_off_caller+0x28/0xd0 [ 5381.660515] [<ffffffff81183caf>] alloc_pages_current+0x10f/0x1f0 [ 5381.660520] [<ffffffff8113fae4>] ? __get_free_pages+0x14/0x50 [ 5381.660524] [<ffffffff8113fae4>] __get_free_pages+0x14/0x50 [ 5381.660530] [<ffffffff8115dace>] kmalloc_order_trace+0x3e/0x100 [ 5381.660536] [<ffffffff81191ea0>] __kmalloc_track_caller+0x220/0x230 [ 5381.660560] [<ffffffffa0729fdb>] ? fs_path_ensure_buf.part.12+0x6b/0x200 [btrfs] [ 5381.660564] [<ffffffff8178085c>] ? retint_restore_args+0xe/0xe [ 5381.660569] [<ffffffff811580ef>] krealloc+0x6f/0xb0 [ 5381.660586] [<ffffffffa0729fdb>] fs_path_ensure_buf.part.12+0x6b/0x200 [btrfs] [ 5381.660601] [<ffffffffa072a208>] fs_path_prepare_for_add+0x98/0xb0 [btrfs] [ 5381.660615] [<ffffffffa072a2bc>] fs_path_add_path+0x2c/0x60 [btrfs] [ 5381.660628] [<ffffffffa072c55c>] get_cur_path+0x7c/0x1c0 [btrfs] Even without this loop, the incremental send couldn't succeed, because it would attempt to send a rename/move operation for the lower inode before the highest inode number was renamed/move. This issue is easy to trigger with the following steps: $ mkfs.btrfs -f /dev/sdb3 $ mount /dev/sdb3 /mnt/btrfs $ mkdir -p /mnt/btrfs/a/b/c/d $ mkdir /mnt/btrfs/a/b/c2 $ btrfs subvol snapshot -r /mnt/btrfs /mnt/btrfs/snap1 $ mv /mnt/btrfs/a/b/c/d /mnt/btrfs/a/b/c2/d2 $ mv /mnt/btrfs/a/b/c /mnt/btrfs/a/b/c2/d2/cc $ btrfs subvol snapshot -r /mnt/btrfs /mnt/btrfs/snap2 $ btrfs send -p /mnt/btrfs/snap1 /mnt/btrfs/snap2 > /tmp/incremental.send The structure of the filesystem when the first snapshot is taken is: . (ino 256) |-- a (ino 257) |-- b (ino 258) |-- c (ino 259) | |-- d (ino 260) | |-- c2 (ino 261) And its structure when the second snapshot is taken is: . (ino 256) |-- a (ino 257) |-- b (ino 258) |-- c2 (ino 261) |-- d2 (ino 260) |-- cc (ino 259) Before the move/rename operation is performed for the inode 259, the move/rename for inode 260 must be performed, since 259 is now a child of 260. A test case for xfstests, with a more complex scenario, will follow soon. Signed-off-by: Filipe David Borba Manana <fdmanana@gmail.com> Signed-off-by: Josef Bacik <jbacik@fb.com> Signed-off-by: Chris Mason <clm@fb.com>
2014-01-22 10:00:53 +00:00
Btrfs: incremental send, fix invalid path after dir rename This fixes yet one more case not caught by the commit titled: Btrfs: fix infinite path build loops in incremental send In this case, even before the initial full send, we have a directory which is a child of a directory with a higher inode number. Then we perform the initial send, and after we rename both the child and the parent, without moving them around. After doing these 2 renames, an incremental send sent a rename instruction for the child directory which contained an invalid "from" path (referenced the parent's old name, not the new one), which made the btrfs receive command fail. Steps to reproduce: $ mkfs.btrfs -f /dev/sdb3 $ mount /dev/sdb3 /mnt/btrfs $ mkdir -p /mnt/btrfs/a/b $ mkdir /mnt/btrfs/d $ mkdir /mnt/btrfs/a/b/c $ mv /mnt/btrfs/d /mnt/btrfs/a/b/c $ btrfs subvolume snapshot -r /mnt/btrfs /mnt/btrfs/snap1 $ btrfs send /mnt/btrfs/snap1 -f /tmp/base.send $ mv /mnt/btrfs/a/b/c /mnt/btrfs/a/b/x $ mv /mnt/btrfs/a/b/x/d /mnt/btrfs/a/b/x/y $ btrfs subvolume snapshot -r /mnt/btrfs /mnt/btrfs/snap2 $ btrfs send -p /mnt/btrfs/snap1 /mnt/btrfs/snap2 -f /tmp/incremental.send $ umout /mnt/btrfs $ mkfs.btrfs -f /dev/sdb3 $ mount /dev/sdb3 /mnt/btrfs $ btrfs receive /mnt/btrfs -f /tmp/base.send $ btrfs receive /mnt/btrfs -f /tmp/incremental.send The second btrfs receive command failed with: "ERROR: rename a/b/c/d -> a/b/x/y failed. No such file or directory" A test case for xfstests follows. Signed-off-by: Filipe David Borba Manana <fdmanana@gmail.com> Signed-off-by: Josef Bacik <jbacik@fb.com>
2014-02-16 13:43:11 +00:00
Btrfs: fix send attempting to rmdir non-empty directories The incremental send algorithm assumed that it was possible to issue a directory remove (rmdir) if the the inode number it was currently processing was greater than (or equal) to any inode that referenced the directory's inode. This wasn't a valid assumption because any such inode might be a child directory that is pending a move/rename operation, because it was moved into a directory that has a higher inode number and was moved/renamed too - in other words, the case the following commit addressed: 9f03740a956d7ac6a1b8f8c455da6fa5cae11c22 (Btrfs: fix infinite path build loops in incremental send) This made an incremental send issue an rmdir operation before the target directory was actually empty, which made btrfs receive fail. Therefore it needs to wait for all pending child directory inodes to be moved/renamed before sending an rmdir operation. Simple steps to reproduce this issue: $ mkfs.btrfs -f /dev/sdb3 $ mount /dev/sdb3 /mnt/btrfs $ mkdir -p /mnt/btrfs/a/b/c/x $ mkdir /mnt/btrfs/a/b/y $ btrfs subvolume snapshot -r /mnt/btrfs /mnt/btrfs/snap1 $ btrfs send /mnt/btrfs/snap1 -f /tmp/base.send $ mv /mnt/btrfs/a/b/y /mnt/btrfs/a/b/YY $ mv /mnt/btrfs/a/b/c/x /mnt/btrfs/a/b/YY $ rmdir /mnt/btrfs/a/b/c $ btrfs subvolume snapshot -r /mnt/btrfs /mnt/btrfs/snap2 $ btrfs send -p /mnt/btrfs/snap1 /mnt/btrfs/snap2 -f /tmp/incremental.send $ umount /mnt/btrfs $ mkfs.btrfs -f /dev/sdb3 $ mount /dev/sdb3 /mnt/btrfs $ btrfs receive /mnt/btrfs -f /tmp/base.send $ btrfs receive /mnt/btrfs -f /tmp/incremental.send The second btrfs receive command failed with: ERROR: rmdir o259-6-0 failed. Directory not empty A test case for xfstests follows. Signed-off-by: Filipe David Borba Manana <fdmanana@gmail.com> Signed-off-by: Josef Bacik <jbacik@fb.com>
2014-02-19 14:31:44 +00:00
Btrfs: fix infinite path build loops in incremental send The send operation processes inodes by their ascending number, and assumes that any rename/move operation can be successfully performed (sent to the caller) once all previous inodes (those with a smaller inode number than the one we're currently processing) were processed. This is not true when an incremental send had to process an hierarchical change between 2 snapshots where the parent-children relationship between directory inodes was reversed - that is, parents became children and children became parents. This situation made the path building code go into an infinite loop, which kept allocating more and more memory that eventually lead to a krealloc warning being displayed in dmesg: WARNING: CPU: 1 PID: 5705 at mm/page_alloc.c:2477 __alloc_pages_nodemask+0x365/0xad0() Modules linked in: btrfs raid6_pq xor pci_stub vboxpci(O) vboxnetadp(O) vboxnetflt(O) vboxdrv(O) snd_hda_codec_hdmi snd_hda_codec_realtek joydev radeon snd_hda_intel snd_hda_codec snd_hwdep snd_seq_midi snd_pcm psmouse i915 snd_rawmidi serio_raw snd_seq_midi_event lpc_ich snd_seq snd_timer ttm snd_seq_device rfcomm drm_kms_helper parport_pc bnep bluetooth drm ppdev snd soundcore i2c_algo_bit snd_page_alloc binfmt_misc video lp parport r8169 mii hid_generic usbhid hid CPU: 1 PID: 5705 Comm: btrfs Tainted: G O 3.13.0-rc7-fdm-btrfs-next-18+ #3 Hardware name: To Be Filled By O.E.M. To Be Filled By O.E.M./Z77 Pro4, BIOS P1.50 09/04/2012 [ 5381.660441] 00000000000009ad ffff8806f6f2f4e8 ffffffff81777434 0000000000000007 [ 5381.660447] 0000000000000000 ffff8806f6f2f528 ffffffff8104a9ec ffff8807038f36f0 [ 5381.660452] 0000000000000000 0000000000000206 ffff8807038f2490 ffff8807038f36f0 [ 5381.660457] Call Trace: [ 5381.660464] [<ffffffff81777434>] dump_stack+0x4e/0x68 [ 5381.660471] [<ffffffff8104a9ec>] warn_slowpath_common+0x8c/0xc0 [ 5381.660476] [<ffffffff8104aa3a>] warn_slowpath_null+0x1a/0x20 [ 5381.660480] [<ffffffff81144995>] __alloc_pages_nodemask+0x365/0xad0 [ 5381.660487] [<ffffffff8108313f>] ? local_clock+0x4f/0x60 [ 5381.660491] [<ffffffff811430e8>] ? free_one_page+0x98/0x440 [ 5381.660495] [<ffffffff8108313f>] ? local_clock+0x4f/0x60 [ 5381.660502] [<ffffffff8113fae4>] ? __get_free_pages+0x14/0x50 [ 5381.660508] [<ffffffff81095fb8>] ? trace_hardirqs_off_caller+0x28/0xd0 [ 5381.660515] [<ffffffff81183caf>] alloc_pages_current+0x10f/0x1f0 [ 5381.660520] [<ffffffff8113fae4>] ? __get_free_pages+0x14/0x50 [ 5381.660524] [<ffffffff8113fae4>] __get_free_pages+0x14/0x50 [ 5381.660530] [<ffffffff8115dace>] kmalloc_order_trace+0x3e/0x100 [ 5381.660536] [<ffffffff81191ea0>] __kmalloc_track_caller+0x220/0x230 [ 5381.660560] [<ffffffffa0729fdb>] ? fs_path_ensure_buf.part.12+0x6b/0x200 [btrfs] [ 5381.660564] [<ffffffff8178085c>] ? retint_restore_args+0xe/0xe [ 5381.660569] [<ffffffff811580ef>] krealloc+0x6f/0xb0 [ 5381.660586] [<ffffffffa0729fdb>] fs_path_ensure_buf.part.12+0x6b/0x200 [btrfs] [ 5381.660601] [<ffffffffa072a208>] fs_path_prepare_for_add+0x98/0xb0 [btrfs] [ 5381.660615] [<ffffffffa072a2bc>] fs_path_add_path+0x2c/0x60 [btrfs] [ 5381.660628] [<ffffffffa072c55c>] get_cur_path+0x7c/0x1c0 [btrfs] Even without this loop, the incremental send couldn't succeed, because it would attempt to send a rename/move operation for the lower inode before the highest inode number was renamed/move. This issue is easy to trigger with the following steps: $ mkfs.btrfs -f /dev/sdb3 $ mount /dev/sdb3 /mnt/btrfs $ mkdir -p /mnt/btrfs/a/b/c/d $ mkdir /mnt/btrfs/a/b/c2 $ btrfs subvol snapshot -r /mnt/btrfs /mnt/btrfs/snap1 $ mv /mnt/btrfs/a/b/c/d /mnt/btrfs/a/b/c2/d2 $ mv /mnt/btrfs/a/b/c /mnt/btrfs/a/b/c2/d2/cc $ btrfs subvol snapshot -r /mnt/btrfs /mnt/btrfs/snap2 $ btrfs send -p /mnt/btrfs/snap1 /mnt/btrfs/snap2 > /tmp/incremental.send The structure of the filesystem when the first snapshot is taken is: . (ino 256) |-- a (ino 257) |-- b (ino 258) |-- c (ino 259) | |-- d (ino 260) | |-- c2 (ino 261) And its structure when the second snapshot is taken is: . (ino 256) |-- a (ino 257) |-- b (ino 258) |-- c2 (ino 261) |-- d2 (ino 260) |-- cc (ino 259) Before the move/rename operation is performed for the inode 259, the move/rename for inode 260 must be performed, since 259 is now a child of 260. A test case for xfstests, with a more complex scenario, will follow soon. Signed-off-by: Filipe David Borba Manana <fdmanana@gmail.com> Signed-off-by: Josef Bacik <jbacik@fb.com> Signed-off-by: Chris Mason <clm@fb.com>
2014-01-22 10:00:53 +00:00
Btrfs: incremental send, fix invalid path after dir rename This fixes yet one more case not caught by the commit titled: Btrfs: fix infinite path build loops in incremental send In this case, even before the initial full send, we have a directory which is a child of a directory with a higher inode number. Then we perform the initial send, and after we rename both the child and the parent, without moving them around. After doing these 2 renames, an incremental send sent a rename instruction for the child directory which contained an invalid "from" path (referenced the parent's old name, not the new one), which made the btrfs receive command fail. Steps to reproduce: $ mkfs.btrfs -f /dev/sdb3 $ mount /dev/sdb3 /mnt/btrfs $ mkdir -p /mnt/btrfs/a/b $ mkdir /mnt/btrfs/d $ mkdir /mnt/btrfs/a/b/c $ mv /mnt/btrfs/d /mnt/btrfs/a/b/c $ btrfs subvolume snapshot -r /mnt/btrfs /mnt/btrfs/snap1 $ btrfs send /mnt/btrfs/snap1 -f /tmp/base.send $ mv /mnt/btrfs/a/b/c /mnt/btrfs/a/b/x $ mv /mnt/btrfs/a/b/x/d /mnt/btrfs/a/b/x/y $ btrfs subvolume snapshot -r /mnt/btrfs /mnt/btrfs/snap2 $ btrfs send -p /mnt/btrfs/snap1 /mnt/btrfs/snap2 -f /tmp/incremental.send $ umout /mnt/btrfs $ mkfs.btrfs -f /dev/sdb3 $ mount /dev/sdb3 /mnt/btrfs $ btrfs receive /mnt/btrfs -f /tmp/base.send $ btrfs receive /mnt/btrfs -f /tmp/incremental.send The second btrfs receive command failed with: "ERROR: rename a/b/c/d -> a/b/x/y failed. No such file or directory" A test case for xfstests follows. Signed-off-by: Filipe David Borba Manana <fdmanana@gmail.com> Signed-off-by: Josef Bacik <jbacik@fb.com>
2014-02-16 13:43:11 +00:00
Btrfs: fix infinite path build loops in incremental send The send operation processes inodes by their ascending number, and assumes that any rename/move operation can be successfully performed (sent to the caller) once all previous inodes (those with a smaller inode number than the one we're currently processing) were processed. This is not true when an incremental send had to process an hierarchical change between 2 snapshots where the parent-children relationship between directory inodes was reversed - that is, parents became children and children became parents. This situation made the path building code go into an infinite loop, which kept allocating more and more memory that eventually lead to a krealloc warning being displayed in dmesg: WARNING: CPU: 1 PID: 5705 at mm/page_alloc.c:2477 __alloc_pages_nodemask+0x365/0xad0() Modules linked in: btrfs raid6_pq xor pci_stub vboxpci(O) vboxnetadp(O) vboxnetflt(O) vboxdrv(O) snd_hda_codec_hdmi snd_hda_codec_realtek joydev radeon snd_hda_intel snd_hda_codec snd_hwdep snd_seq_midi snd_pcm psmouse i915 snd_rawmidi serio_raw snd_seq_midi_event lpc_ich snd_seq snd_timer ttm snd_seq_device rfcomm drm_kms_helper parport_pc bnep bluetooth drm ppdev snd soundcore i2c_algo_bit snd_page_alloc binfmt_misc video lp parport r8169 mii hid_generic usbhid hid CPU: 1 PID: 5705 Comm: btrfs Tainted: G O 3.13.0-rc7-fdm-btrfs-next-18+ #3 Hardware name: To Be Filled By O.E.M. To Be Filled By O.E.M./Z77 Pro4, BIOS P1.50 09/04/2012 [ 5381.660441] 00000000000009ad ffff8806f6f2f4e8 ffffffff81777434 0000000000000007 [ 5381.660447] 0000000000000000 ffff8806f6f2f528 ffffffff8104a9ec ffff8807038f36f0 [ 5381.660452] 0000000000000000 0000000000000206 ffff8807038f2490 ffff8807038f36f0 [ 5381.660457] Call Trace: [ 5381.660464] [<ffffffff81777434>] dump_stack+0x4e/0x68 [ 5381.660471] [<ffffffff8104a9ec>] warn_slowpath_common+0x8c/0xc0 [ 5381.660476] [<ffffffff8104aa3a>] warn_slowpath_null+0x1a/0x20 [ 5381.660480] [<ffffffff81144995>] __alloc_pages_nodemask+0x365/0xad0 [ 5381.660487] [<ffffffff8108313f>] ? local_clock+0x4f/0x60 [ 5381.660491] [<ffffffff811430e8>] ? free_one_page+0x98/0x440 [ 5381.660495] [<ffffffff8108313f>] ? local_clock+0x4f/0x60 [ 5381.660502] [<ffffffff8113fae4>] ? __get_free_pages+0x14/0x50 [ 5381.660508] [<ffffffff81095fb8>] ? trace_hardirqs_off_caller+0x28/0xd0 [ 5381.660515] [<ffffffff81183caf>] alloc_pages_current+0x10f/0x1f0 [ 5381.660520] [<ffffffff8113fae4>] ? __get_free_pages+0x14/0x50 [ 5381.660524] [<ffffffff8113fae4>] __get_free_pages+0x14/0x50 [ 5381.660530] [<ffffffff8115dace>] kmalloc_order_trace+0x3e/0x100 [ 5381.660536] [<ffffffff81191ea0>] __kmalloc_track_caller+0x220/0x230 [ 5381.660560] [<ffffffffa0729fdb>] ? fs_path_ensure_buf.part.12+0x6b/0x200 [btrfs] [ 5381.660564] [<ffffffff8178085c>] ? retint_restore_args+0xe/0xe [ 5381.660569] [<ffffffff811580ef>] krealloc+0x6f/0xb0 [ 5381.660586] [<ffffffffa0729fdb>] fs_path_ensure_buf.part.12+0x6b/0x200 [btrfs] [ 5381.660601] [<ffffffffa072a208>] fs_path_prepare_for_add+0x98/0xb0 [btrfs] [ 5381.660615] [<ffffffffa072a2bc>] fs_path_add_path+0x2c/0x60 [btrfs] [ 5381.660628] [<ffffffffa072c55c>] get_cur_path+0x7c/0x1c0 [btrfs] Even without this loop, the incremental send couldn't succeed, because it would attempt to send a rename/move operation for the lower inode before the highest inode number was renamed/move. This issue is easy to trigger with the following steps: $ mkfs.btrfs -f /dev/sdb3 $ mount /dev/sdb3 /mnt/btrfs $ mkdir -p /mnt/btrfs/a/b/c/d $ mkdir /mnt/btrfs/a/b/c2 $ btrfs subvol snapshot -r /mnt/btrfs /mnt/btrfs/snap1 $ mv /mnt/btrfs/a/b/c/d /mnt/btrfs/a/b/c2/d2 $ mv /mnt/btrfs/a/b/c /mnt/btrfs/a/b/c2/d2/cc $ btrfs subvol snapshot -r /mnt/btrfs /mnt/btrfs/snap2 $ btrfs send -p /mnt/btrfs/snap1 /mnt/btrfs/snap2 > /tmp/incremental.send The structure of the filesystem when the first snapshot is taken is: . (ino 256) |-- a (ino 257) |-- b (ino 258) |-- c (ino 259) | |-- d (ino 260) | |-- c2 (ino 261) And its structure when the second snapshot is taken is: . (ino 256) |-- a (ino 257) |-- b (ino 258) |-- c2 (ino 261) |-- d2 (ino 260) |-- cc (ino 259) Before the move/rename operation is performed for the inode 259, the move/rename for inode 260 must be performed, since 259 is now a child of 260. A test case for xfstests, with a more complex scenario, will follow soon. Signed-off-by: Filipe David Borba Manana <fdmanana@gmail.com> Signed-off-by: Josef Bacik <jbacik@fb.com> Signed-off-by: Chris Mason <clm@fb.com>
2014-01-22 10:00:53 +00:00
Btrfs: incremental send, fix invalid path after dir rename This fixes yet one more case not caught by the commit titled: Btrfs: fix infinite path build loops in incremental send In this case, even before the initial full send, we have a directory which is a child of a directory with a higher inode number. Then we perform the initial send, and after we rename both the child and the parent, without moving them around. After doing these 2 renames, an incremental send sent a rename instruction for the child directory which contained an invalid "from" path (referenced the parent's old name, not the new one), which made the btrfs receive command fail. Steps to reproduce: $ mkfs.btrfs -f /dev/sdb3 $ mount /dev/sdb3 /mnt/btrfs $ mkdir -p /mnt/btrfs/a/b $ mkdir /mnt/btrfs/d $ mkdir /mnt/btrfs/a/b/c $ mv /mnt/btrfs/d /mnt/btrfs/a/b/c $ btrfs subvolume snapshot -r /mnt/btrfs /mnt/btrfs/snap1 $ btrfs send /mnt/btrfs/snap1 -f /tmp/base.send $ mv /mnt/btrfs/a/b/c /mnt/btrfs/a/b/x $ mv /mnt/btrfs/a/b/x/d /mnt/btrfs/a/b/x/y $ btrfs subvolume snapshot -r /mnt/btrfs /mnt/btrfs/snap2 $ btrfs send -p /mnt/btrfs/snap1 /mnt/btrfs/snap2 -f /tmp/incremental.send $ umout /mnt/btrfs $ mkfs.btrfs -f /dev/sdb3 $ mount /dev/sdb3 /mnt/btrfs $ btrfs receive /mnt/btrfs -f /tmp/base.send $ btrfs receive /mnt/btrfs -f /tmp/incremental.send The second btrfs receive command failed with: "ERROR: rename a/b/c/d -> a/b/x/y failed. No such file or directory" A test case for xfstests follows. Signed-off-by: Filipe David Borba Manana <fdmanana@gmail.com> Signed-off-by: Josef Bacik <jbacik@fb.com>
2014-02-16 13:43:11 +00:00
Btrfs: fix infinite path build loops in incremental send The send operation processes inodes by their ascending number, and assumes that any rename/move operation can be successfully performed (sent to the caller) once all previous inodes (those with a smaller inode number than the one we're currently processing) were processed. This is not true when an incremental send had to process an hierarchical change between 2 snapshots where the parent-children relationship between directory inodes was reversed - that is, parents became children and children became parents. This situation made the path building code go into an infinite loop, which kept allocating more and more memory that eventually lead to a krealloc warning being displayed in dmesg: WARNING: CPU: 1 PID: 5705 at mm/page_alloc.c:2477 __alloc_pages_nodemask+0x365/0xad0() Modules linked in: btrfs raid6_pq xor pci_stub vboxpci(O) vboxnetadp(O) vboxnetflt(O) vboxdrv(O) snd_hda_codec_hdmi snd_hda_codec_realtek joydev radeon snd_hda_intel snd_hda_codec snd_hwdep snd_seq_midi snd_pcm psmouse i915 snd_rawmidi serio_raw snd_seq_midi_event lpc_ich snd_seq snd_timer ttm snd_seq_device rfcomm drm_kms_helper parport_pc bnep bluetooth drm ppdev snd soundcore i2c_algo_bit snd_page_alloc binfmt_misc video lp parport r8169 mii hid_generic usbhid hid CPU: 1 PID: 5705 Comm: btrfs Tainted: G O 3.13.0-rc7-fdm-btrfs-next-18+ #3 Hardware name: To Be Filled By O.E.M. To Be Filled By O.E.M./Z77 Pro4, BIOS P1.50 09/04/2012 [ 5381.660441] 00000000000009ad ffff8806f6f2f4e8 ffffffff81777434 0000000000000007 [ 5381.660447] 0000000000000000 ffff8806f6f2f528 ffffffff8104a9ec ffff8807038f36f0 [ 5381.660452] 0000000000000000 0000000000000206 ffff8807038f2490 ffff8807038f36f0 [ 5381.660457] Call Trace: [ 5381.660464] [<ffffffff81777434>] dump_stack+0x4e/0x68 [ 5381.660471] [<ffffffff8104a9ec>] warn_slowpath_common+0x8c/0xc0 [ 5381.660476] [<ffffffff8104aa3a>] warn_slowpath_null+0x1a/0x20 [ 5381.660480] [<ffffffff81144995>] __alloc_pages_nodemask+0x365/0xad0 [ 5381.660487] [<ffffffff8108313f>] ? local_clock+0x4f/0x60 [ 5381.660491] [<ffffffff811430e8>] ? free_one_page+0x98/0x440 [ 5381.660495] [<ffffffff8108313f>] ? local_clock+0x4f/0x60 [ 5381.660502] [<ffffffff8113fae4>] ? __get_free_pages+0x14/0x50 [ 5381.660508] [<ffffffff81095fb8>] ? trace_hardirqs_off_caller+0x28/0xd0 [ 5381.660515] [<ffffffff81183caf>] alloc_pages_current+0x10f/0x1f0 [ 5381.660520] [<ffffffff8113fae4>] ? __get_free_pages+0x14/0x50 [ 5381.660524] [<ffffffff8113fae4>] __get_free_pages+0x14/0x50 [ 5381.660530] [<ffffffff8115dace>] kmalloc_order_trace+0x3e/0x100 [ 5381.660536] [<ffffffff81191ea0>] __kmalloc_track_caller+0x220/0x230 [ 5381.660560] [<ffffffffa0729fdb>] ? fs_path_ensure_buf.part.12+0x6b/0x200 [btrfs] [ 5381.660564] [<ffffffff8178085c>] ? retint_restore_args+0xe/0xe [ 5381.660569] [<ffffffff811580ef>] krealloc+0x6f/0xb0 [ 5381.660586] [<ffffffffa0729fdb>] fs_path_ensure_buf.part.12+0x6b/0x200 [btrfs] [ 5381.660601] [<ffffffffa072a208>] fs_path_prepare_for_add+0x98/0xb0 [btrfs] [ 5381.660615] [<ffffffffa072a2bc>] fs_path_add_path+0x2c/0x60 [btrfs] [ 5381.660628] [<ffffffffa072c55c>] get_cur_path+0x7c/0x1c0 [btrfs] Even without this loop, the incremental send couldn't succeed, because it would attempt to send a rename/move operation for the lower inode before the highest inode number was renamed/move. This issue is easy to trigger with the following steps: $ mkfs.btrfs -f /dev/sdb3 $ mount /dev/sdb3 /mnt/btrfs $ mkdir -p /mnt/btrfs/a/b/c/d $ mkdir /mnt/btrfs/a/b/c2 $ btrfs subvol snapshot -r /mnt/btrfs /mnt/btrfs/snap1 $ mv /mnt/btrfs/a/b/c/d /mnt/btrfs/a/b/c2/d2 $ mv /mnt/btrfs/a/b/c /mnt/btrfs/a/b/c2/d2/cc $ btrfs subvol snapshot -r /mnt/btrfs /mnt/btrfs/snap2 $ btrfs send -p /mnt/btrfs/snap1 /mnt/btrfs/snap2 > /tmp/incremental.send The structure of the filesystem when the first snapshot is taken is: . (ino 256) |-- a (ino 257) |-- b (ino 258) |-- c (ino 259) | |-- d (ino 260) | |-- c2 (ino 261) And its structure when the second snapshot is taken is: . (ino 256) |-- a (ino 257) |-- b (ino 258) |-- c2 (ino 261) |-- d2 (ino 260) |-- cc (ino 259) Before the move/rename operation is performed for the inode 259, the move/rename for inode 260 must be performed, since 259 is now a child of 260. A test case for xfstests, with a more complex scenario, will follow soon. Signed-off-by: Filipe David Borba Manana <fdmanana@gmail.com> Signed-off-by: Josef Bacik <jbacik@fb.com> Signed-off-by: Chris Mason <clm@fb.com>
2014-01-22 10:00:53 +00:00
Btrfs: fix send attempting to rmdir non-empty directories The incremental send algorithm assumed that it was possible to issue a directory remove (rmdir) if the the inode number it was currently processing was greater than (or equal) to any inode that referenced the directory's inode. This wasn't a valid assumption because any such inode might be a child directory that is pending a move/rename operation, because it was moved into a directory that has a higher inode number and was moved/renamed too - in other words, the case the following commit addressed: 9f03740a956d7ac6a1b8f8c455da6fa5cae11c22 (Btrfs: fix infinite path build loops in incremental send) This made an incremental send issue an rmdir operation before the target directory was actually empty, which made btrfs receive fail. Therefore it needs to wait for all pending child directory inodes to be moved/renamed before sending an rmdir operation. Simple steps to reproduce this issue: $ mkfs.btrfs -f /dev/sdb3 $ mount /dev/sdb3 /mnt/btrfs $ mkdir -p /mnt/btrfs/a/b/c/x $ mkdir /mnt/btrfs/a/b/y $ btrfs subvolume snapshot -r /mnt/btrfs /mnt/btrfs/snap1 $ btrfs send /mnt/btrfs/snap1 -f /tmp/base.send $ mv /mnt/btrfs/a/b/y /mnt/btrfs/a/b/YY $ mv /mnt/btrfs/a/b/c/x /mnt/btrfs/a/b/YY $ rmdir /mnt/btrfs/a/b/c $ btrfs subvolume snapshot -r /mnt/btrfs /mnt/btrfs/snap2 $ btrfs send -p /mnt/btrfs/snap1 /mnt/btrfs/snap2 -f /tmp/incremental.send $ umount /mnt/btrfs $ mkfs.btrfs -f /dev/sdb3 $ mount /dev/sdb3 /mnt/btrfs $ btrfs receive /mnt/btrfs -f /tmp/base.send $ btrfs receive /mnt/btrfs -f /tmp/incremental.send The second btrfs receive command failed with: ERROR: rmdir o259-6-0 failed. Directory not empty A test case for xfstests follows. Signed-off-by: Filipe David Borba Manana <fdmanana@gmail.com> Signed-off-by: Josef Bacik <jbacik@fb.com>
2014-02-19 14:31:44 +00:00
Btrfs: incremental send, fix invalid path after dir rename This fixes yet one more case not caught by the commit titled: Btrfs: fix infinite path build loops in incremental send In this case, even before the initial full send, we have a directory which is a child of a directory with a higher inode number. Then we perform the initial send, and after we rename both the child and the parent, without moving them around. After doing these 2 renames, an incremental send sent a rename instruction for the child directory which contained an invalid "from" path (referenced the parent's old name, not the new one), which made the btrfs receive command fail. Steps to reproduce: $ mkfs.btrfs -f /dev/sdb3 $ mount /dev/sdb3 /mnt/btrfs $ mkdir -p /mnt/btrfs/a/b $ mkdir /mnt/btrfs/d $ mkdir /mnt/btrfs/a/b/c $ mv /mnt/btrfs/d /mnt/btrfs/a/b/c $ btrfs subvolume snapshot -r /mnt/btrfs /mnt/btrfs/snap1 $ btrfs send /mnt/btrfs/snap1 -f /tmp/base.send $ mv /mnt/btrfs/a/b/c /mnt/btrfs/a/b/x $ mv /mnt/btrfs/a/b/x/d /mnt/btrfs/a/b/x/y $ btrfs subvolume snapshot -r /mnt/btrfs /mnt/btrfs/snap2 $ btrfs send -p /mnt/btrfs/snap1 /mnt/btrfs/snap2 -f /tmp/incremental.send $ umout /mnt/btrfs $ mkfs.btrfs -f /dev/sdb3 $ mount /dev/sdb3 /mnt/btrfs $ btrfs receive /mnt/btrfs -f /tmp/base.send $ btrfs receive /mnt/btrfs -f /tmp/incremental.send The second btrfs receive command failed with: "ERROR: rename a/b/c/d -> a/b/x/y failed. No such file or directory" A test case for xfstests follows. Signed-off-by: Filipe David Borba Manana <fdmanana@gmail.com> Signed-off-by: Josef Bacik <jbacik@fb.com>
2014-02-16 13:43:11 +00:00
Btrfs: incremental send, don't rename a directory too soon There's one more case where we can't issue a rename operation for a directory as soon as we process it. We used to delay directory renames only if they have some ancestor directory with a higher inode number that got renamed too, but there's another case where we need to delay the rename too - when a directory A is renamed to the old name of a directory B but that directory B has its rename delayed because it has now (in the send root) an ancestor with a higher inode number that was renamed. If we don't delay the directory rename in this case, the receiving end of the send stream will attempt to rename A to the old name of B before B got renamed to its new name, which results in a "directory not empty" error. So fix this by delaying directory renames for this case too. Steps to reproduce: $ mkfs.btrfs -f /dev/sdb $ mount /dev/sdb /mnt $ mkdir /mnt/a $ mkdir /mnt/b $ mkdir /mnt/c $ touch /mnt/a/file $ btrfs subvolume snapshot -r /mnt /mnt/snap1 $ mv /mnt/c /mnt/x $ mv /mnt/a /mnt/x/y $ mv /mnt/b /mnt/a $ btrfs subvolume snapshot -r /mnt /mnt/snap2 $ btrfs send /mnt/snap1 -f /tmp/1.send $ btrfs send -p /mnt/snap1 /mnt/snap2 -f /tmp/2.send $ mkfs.btrfs -f /dev/sdc $ mount /dev/sdc /mnt2 $ btrfs receive /mnt2 -f /tmp/1.send $ btrfs receive /mnt2 -f /tmp/2.send ERROR: rename b -> a failed. Directory not empty A test case for xfstests follows soon. Reported-by: Ames Cornish <ames@cornishes.net> Signed-off-by: Filipe Manana <fdmanana@suse.com> Signed-off-by: Chris Mason <clm@fb.com>
2015-02-28 22:29:22 +00:00
Btrfs: send, account for orphan directories when building path strings If we have directories with a pending move/rename operation, we must take into account any orphan directories that got created before executing the pending move/rename. Those orphan directories are directories with an inode number higher then the current send progress and that don't exist in the parent snapshot, they are created before current progress reaches their inode number, with a generated name of the form oN-M-I and at the root of the filesystem tree, and later when progress matches their inode number, moved/renamed to their final location. Reproducer: $ mkfs.btrfs -f /dev/sdd $ mount /dev/sdd /mnt $ mkdir -p /mnt/a/b/c/d $ mkdir /mnt/a/b/e $ mv /mnt/a/b/c /mnt/a/b/e/CC $ mkdir /mnt/a/b/e/CC/d/f $ mkdir /mnt/a/g $ btrfs subvolume snapshot -r /mnt /mnt/snap1 $ btrfs send /mnt/snap1 -f /tmp/base.send $ mkdir /mnt/a/g/h $ mv /mnt/a/b/e /mnt/a/g/h/EE $ mv /mnt/a/g/h/EE/CC/d /mnt/a/g/h/EE/DD $ btrfs subvolume snapshot -r /mnt /mnt/snap2 $ btrfs send -p /mnt/snap1 /mnt/snap2 -f /tmp/incremental.send The second receive command failed with the following error: ERROR: rename a/b/e/CC/d -> o264-7-0/EE/DD failed. No such file or directory A test case for xfstests follows soon. Signed-off-by: Filipe David Borba Manana <fdmanana@gmail.com> Signed-off-by: Chris Mason <clm@fb.com>
2014-03-22 17:15:24 +00:00
Btrfs: send, fix more issues related to directory renames This is a continuation of the previous changes titled: Btrfs: fix incremental send's decision to delay a dir move/rename Btrfs: part 2, fix incremental send's decision to delay a dir move/rename There's a few more cases where a directory rename/move must be delayed which was previously overlooked. If our immediate ancestor has a lower inode number than ours and it doesn't have a delayed rename/move operation associated to it, it doesn't mean there isn't any non-direct ancestor of our current inode that needs to be renamed/moved before our current inode (i.e. with a higher inode number than ours). So we can't stop the search if our immediate ancestor has a lower inode number than ours, we need to navigate the directory hierarchy upwards until we hit the root or: 1) find an ancestor with an higher inode number that was renamed/moved in the send root too (or already has a pending rename/move registered); 2) find an ancestor that is a new directory (higher inode number than ours and exists only in the send root). Reproducer for case 1) $ mkfs.btrfs -f /dev/sdd $ mount /dev/sdd /mnt $ mkdir -p /mnt/a/b $ mkdir -p /mnt/a/c/d $ mkdir /mnt/a/b/e $ mkdir /mnt/a/c/d/f $ mv /mnt/a/b /mnt/a/c/d/2b $ mkdir /mnt/a/x $ mkdir /mnt/a/y $ btrfs subvolume snapshot -r /mnt /mnt/snap1 $ btrfs send /mnt/snap1 -f /tmp/base.send $ mv /mnt/a/x /mnt/a/y $ mv /mnt/a/c/d/2b/e /mnt/a/c/d/2b/2e $ mv /mnt/a/c/d /mnt/a/h/2d $ mv /mnt/a/c /mnt/a/h/2d/2b/2c $ btrfs subvolume snapshot -r /mnt /mnt/snap2 $ btrfs send -p /mnt/snap1 /mnt/snap2 -f /tmp/incremental.send Simple reproducer for case 2) $ mkfs.btrfs -f /dev/sdd $ mount /dev/sdd /mnt $ mkdir -p /mnt/a/b $ mkdir /mnt/a/c $ mv /mnt/a/b /mnt/a/c/b2 $ mkdir /mnt/a/e $ btrfs subvolume snapshot -r /mnt /mnt/snap1 $ btrfs send /mnt/snap1 -f /tmp/base.send $ mv /mnt/a/c/b2 /mnt/a/e/b3 $ mkdir /mnt/a/e/b3/f $ mkdir /mnt/a/h $ mv /mnt/a/c /mnt/a/e/b3/f/c2 $ mv /mnt/a/e /mnt/a/h/e2 $ btrfs subvolume snapshot -r /mnt /mnt/snap2 $ btrfs send -p /mnt/snap1 /mnt/snap2 -f /tmp/incremental.send Another simple reproducer for case 2) $ mkfs.btrfs -f /dev/sdd $ mount /dev/sdd /mnt $ mkdir -p /mnt/a/b $ mkdir /mnt/a/c $ mkdir /mnt/a/b/d $ mkdir /mnt/a/c/e $ btrfs subvolume snapshot -r /mnt /mnt/snap1 $ btrfs send /mnt/snap1 -f /tmp/base.send $ mkdir /mnt/a/b/d/f $ mkdir /mnt/a/b/g $ mv /mnt/a/c/e /mnt/a/b/g/e2 $ mv /mnt/a/c /mnt/a/b/d/f/c2 $ mv /mnt/a/b/d/f /mnt/a/b/g/e2/f2 $ btrfs subvolume snapshot -r /mnt /mnt/snap2 $ btrfs send -p /mnt/snap1 /mnt/snap2 -f /tmp/incremental.send More complex reproducer for case 2) $ mkfs.btrfs -f /dev/sdd $ mount /dev/sdd /mnt $ mkdir -p /mnt/a/b $ mkdir -p /mnt/a/c/d $ mkdir /mnt/a/b/e $ mkdir /mnt/a/c/d/f $ mv /mnt/a/b /mnt/a/c/d/2b $ mkdir /mnt/a/x $ mkdir /mnt/a/y $ btrfs subvolume snapshot -r /mnt /mnt/snap1 $ btrfs send /mnt/snap1 -f /tmp/base.send $ mv /mnt/a/x /mnt/a/y $ mv /mnt/a/c/d/2b/e /mnt/a/c/d/2b/2e $ mv /mnt/a/c/d /mnt/a/h/2d $ mv /mnt/a/c /mnt/a/h/2d/2b/2c $ btrfs subvolume snapshot -r /mnt /mnt/snap2 $ btrfs send -p /mnt/snap1 /mnt/snap2 -f /tmp/incremental.send For both cases the incremental send would enter an infinite loop when building path strings. While solving these cases, this change also re-implements the code to detect when directory moves/renames should be delayed. Instead of dealing with several specific cases separately, it's now more generic handling all cases with a simple detection algorithm and if when applying a delayed move/rename there's a path loop detected, it further delays the move/rename registering a new ancestor inode as the dependency inode (so our rename happens after that ancestor is renamed). Tests for these cases is being added to xfstests too. Signed-off-by: Filipe David Borba Manana <fdmanana@gmail.com> Signed-off-by: Chris Mason <clm@fb.com>
2014-03-27 20:14:01 +00:00
Btrfs: send, account for orphan directories when building path strings If we have directories with a pending move/rename operation, we must take into account any orphan directories that got created before executing the pending move/rename. Those orphan directories are directories with an inode number higher then the current send progress and that don't exist in the parent snapshot, they are created before current progress reaches their inode number, with a generated name of the form oN-M-I and at the root of the filesystem tree, and later when progress matches their inode number, moved/renamed to their final location. Reproducer: $ mkfs.btrfs -f /dev/sdd $ mount /dev/sdd /mnt $ mkdir -p /mnt/a/b/c/d $ mkdir /mnt/a/b/e $ mv /mnt/a/b/c /mnt/a/b/e/CC $ mkdir /mnt/a/b/e/CC/d/f $ mkdir /mnt/a/g $ btrfs subvolume snapshot -r /mnt /mnt/snap1 $ btrfs send /mnt/snap1 -f /tmp/base.send $ mkdir /mnt/a/g/h $ mv /mnt/a/b/e /mnt/a/g/h/EE $ mv /mnt/a/g/h/EE/CC/d /mnt/a/g/h/EE/DD $ btrfs subvolume snapshot -r /mnt /mnt/snap2 $ btrfs send -p /mnt/snap1 /mnt/snap2 -f /tmp/incremental.send The second receive command failed with the following error: ERROR: rename a/b/e/CC/d -> o264-7-0/EE/DD failed. No such file or directory A test case for xfstests follows soon. Signed-off-by: Filipe David Borba Manana <fdmanana@gmail.com> Signed-off-by: Chris Mason <clm@fb.com>
2014-03-22 17:15:24 +00:00
Btrfs: fix infinite path build loops in incremental send The send operation processes inodes by their ascending number, and assumes that any rename/move operation can be successfully performed (sent to the caller) once all previous inodes (those with a smaller inode number than the one we're currently processing) were processed. This is not true when an incremental send had to process an hierarchical change between 2 snapshots where the parent-children relationship between directory inodes was reversed - that is, parents became children and children became parents. This situation made the path building code go into an infinite loop, which kept allocating more and more memory that eventually lead to a krealloc warning being displayed in dmesg: WARNING: CPU: 1 PID: 5705 at mm/page_alloc.c:2477 __alloc_pages_nodemask+0x365/0xad0() Modules linked in: btrfs raid6_pq xor pci_stub vboxpci(O) vboxnetadp(O) vboxnetflt(O) vboxdrv(O) snd_hda_codec_hdmi snd_hda_codec_realtek joydev radeon snd_hda_intel snd_hda_codec snd_hwdep snd_seq_midi snd_pcm psmouse i915 snd_rawmidi serio_raw snd_seq_midi_event lpc_ich snd_seq snd_timer ttm snd_seq_device rfcomm drm_kms_helper parport_pc bnep bluetooth drm ppdev snd soundcore i2c_algo_bit snd_page_alloc binfmt_misc video lp parport r8169 mii hid_generic usbhid hid CPU: 1 PID: 5705 Comm: btrfs Tainted: G O 3.13.0-rc7-fdm-btrfs-next-18+ #3 Hardware name: To Be Filled By O.E.M. To Be Filled By O.E.M./Z77 Pro4, BIOS P1.50 09/04/2012 [ 5381.660441] 00000000000009ad ffff8806f6f2f4e8 ffffffff81777434 0000000000000007 [ 5381.660447] 0000000000000000 ffff8806f6f2f528 ffffffff8104a9ec ffff8807038f36f0 [ 5381.660452] 0000000000000000 0000000000000206 ffff8807038f2490 ffff8807038f36f0 [ 5381.660457] Call Trace: [ 5381.660464] [<ffffffff81777434>] dump_stack+0x4e/0x68 [ 5381.660471] [<ffffffff8104a9ec>] warn_slowpath_common+0x8c/0xc0 [ 5381.660476] [<ffffffff8104aa3a>] warn_slowpath_null+0x1a/0x20 [ 5381.660480] [<ffffffff81144995>] __alloc_pages_nodemask+0x365/0xad0 [ 5381.660487] [<ffffffff8108313f>] ? local_clock+0x4f/0x60 [ 5381.660491] [<ffffffff811430e8>] ? free_one_page+0x98/0x440 [ 5381.660495] [<ffffffff8108313f>] ? local_clock+0x4f/0x60 [ 5381.660502] [<ffffffff8113fae4>] ? __get_free_pages+0x14/0x50 [ 5381.660508] [<ffffffff81095fb8>] ? trace_hardirqs_off_caller+0x28/0xd0 [ 5381.660515] [<ffffffff81183caf>] alloc_pages_current+0x10f/0x1f0 [ 5381.660520] [<ffffffff8113fae4>] ? __get_free_pages+0x14/0x50 [ 5381.660524] [<ffffffff8113fae4>] __get_free_pages+0x14/0x50 [ 5381.660530] [<ffffffff8115dace>] kmalloc_order_trace+0x3e/0x100 [ 5381.660536] [<ffffffff81191ea0>] __kmalloc_track_caller+0x220/0x230 [ 5381.660560] [<ffffffffa0729fdb>] ? fs_path_ensure_buf.part.12+0x6b/0x200 [btrfs] [ 5381.660564] [<ffffffff8178085c>] ? retint_restore_args+0xe/0xe [ 5381.660569] [<ffffffff811580ef>] krealloc+0x6f/0xb0 [ 5381.660586] [<ffffffffa0729fdb>] fs_path_ensure_buf.part.12+0x6b/0x200 [btrfs] [ 5381.660601] [<ffffffffa072a208>] fs_path_prepare_for_add+0x98/0xb0 [btrfs] [ 5381.660615] [<ffffffffa072a2bc>] fs_path_add_path+0x2c/0x60 [btrfs] [ 5381.660628] [<ffffffffa072c55c>] get_cur_path+0x7c/0x1c0 [btrfs] Even without this loop, the incremental send couldn't succeed, because it would attempt to send a rename/move operation for the lower inode before the highest inode number was renamed/move. This issue is easy to trigger with the following steps: $ mkfs.btrfs -f /dev/sdb3 $ mount /dev/sdb3 /mnt/btrfs $ mkdir -p /mnt/btrfs/a/b/c/d $ mkdir /mnt/btrfs/a/b/c2 $ btrfs subvol snapshot -r /mnt/btrfs /mnt/btrfs/snap1 $ mv /mnt/btrfs/a/b/c/d /mnt/btrfs/a/b/c2/d2 $ mv /mnt/btrfs/a/b/c /mnt/btrfs/a/b/c2/d2/cc $ btrfs subvol snapshot -r /mnt/btrfs /mnt/btrfs/snap2 $ btrfs send -p /mnt/btrfs/snap1 /mnt/btrfs/snap2 > /tmp/incremental.send The structure of the filesystem when the first snapshot is taken is: . (ino 256) |-- a (ino 257) |-- b (ino 258) |-- c (ino 259) | |-- d (ino 260) | |-- c2 (ino 261) And its structure when the second snapshot is taken is: . (ino 256) |-- a (ino 257) |-- b (ino 258) |-- c2 (ino 261) |-- d2 (ino 260) |-- cc (ino 259) Before the move/rename operation is performed for the inode 259, the move/rename for inode 260 must be performed, since 259 is now a child of 260. A test case for xfstests, with a more complex scenario, will follow soon. Signed-off-by: Filipe David Borba Manana <fdmanana@gmail.com> Signed-off-by: Josef Bacik <jbacik@fb.com> Signed-off-by: Chris Mason <clm@fb.com>
2014-01-22 10:00:53 +00:00
Btrfs: fix send attempting to rmdir non-empty directories The incremental send algorithm assumed that it was possible to issue a directory remove (rmdir) if the the inode number it was currently processing was greater than (or equal) to any inode that referenced the directory's inode. This wasn't a valid assumption because any such inode might be a child directory that is pending a move/rename operation, because it was moved into a directory that has a higher inode number and was moved/renamed too - in other words, the case the following commit addressed: 9f03740a956d7ac6a1b8f8c455da6fa5cae11c22 (Btrfs: fix infinite path build loops in incremental send) This made an incremental send issue an rmdir operation before the target directory was actually empty, which made btrfs receive fail. Therefore it needs to wait for all pending child directory inodes to be moved/renamed before sending an rmdir operation. Simple steps to reproduce this issue: $ mkfs.btrfs -f /dev/sdb3 $ mount /dev/sdb3 /mnt/btrfs $ mkdir -p /mnt/btrfs/a/b/c/x $ mkdir /mnt/btrfs/a/b/y $ btrfs subvolume snapshot -r /mnt/btrfs /mnt/btrfs/snap1 $ btrfs send /mnt/btrfs/snap1 -f /tmp/base.send $ mv /mnt/btrfs/a/b/y /mnt/btrfs/a/b/YY $ mv /mnt/btrfs/a/b/c/x /mnt/btrfs/a/b/YY $ rmdir /mnt/btrfs/a/b/c $ btrfs subvolume snapshot -r /mnt/btrfs /mnt/btrfs/snap2 $ btrfs send -p /mnt/btrfs/snap1 /mnt/btrfs/snap2 -f /tmp/incremental.send $ umount /mnt/btrfs $ mkfs.btrfs -f /dev/sdb3 $ mount /dev/sdb3 /mnt/btrfs $ btrfs receive /mnt/btrfs -f /tmp/base.send $ btrfs receive /mnt/btrfs -f /tmp/incremental.send The second btrfs receive command failed with: ERROR: rmdir o259-6-0 failed. Directory not empty A test case for xfstests follows. Signed-off-by: Filipe David Borba Manana <fdmanana@gmail.com> Signed-off-by: Josef Bacik <jbacik@fb.com>
2014-02-19 14:31:44 +00:00
Btrfs: fix infinite path build loops in incremental send The send operation processes inodes by their ascending number, and assumes that any rename/move operation can be successfully performed (sent to the caller) once all previous inodes (those with a smaller inode number than the one we're currently processing) were processed. This is not true when an incremental send had to process an hierarchical change between 2 snapshots where the parent-children relationship between directory inodes was reversed - that is, parents became children and children became parents. This situation made the path building code go into an infinite loop, which kept allocating more and more memory that eventually lead to a krealloc warning being displayed in dmesg: WARNING: CPU: 1 PID: 5705 at mm/page_alloc.c:2477 __alloc_pages_nodemask+0x365/0xad0() Modules linked in: btrfs raid6_pq xor pci_stub vboxpci(O) vboxnetadp(O) vboxnetflt(O) vboxdrv(O) snd_hda_codec_hdmi snd_hda_codec_realtek joydev radeon snd_hda_intel snd_hda_codec snd_hwdep snd_seq_midi snd_pcm psmouse i915 snd_rawmidi serio_raw snd_seq_midi_event lpc_ich snd_seq snd_timer ttm snd_seq_device rfcomm drm_kms_helper parport_pc bnep bluetooth drm ppdev snd soundcore i2c_algo_bit snd_page_alloc binfmt_misc video lp parport r8169 mii hid_generic usbhid hid CPU: 1 PID: 5705 Comm: btrfs Tainted: G O 3.13.0-rc7-fdm-btrfs-next-18+ #3 Hardware name: To Be Filled By O.E.M. To Be Filled By O.E.M./Z77 Pro4, BIOS P1.50 09/04/2012 [ 5381.660441] 00000000000009ad ffff8806f6f2f4e8 ffffffff81777434 0000000000000007 [ 5381.660447] 0000000000000000 ffff8806f6f2f528 ffffffff8104a9ec ffff8807038f36f0 [ 5381.660452] 0000000000000000 0000000000000206 ffff8807038f2490 ffff8807038f36f0 [ 5381.660457] Call Trace: [ 5381.660464] [<ffffffff81777434>] dump_stack+0x4e/0x68 [ 5381.660471] [<ffffffff8104a9ec>] warn_slowpath_common+0x8c/0xc0 [ 5381.660476] [<ffffffff8104aa3a>] warn_slowpath_null+0x1a/0x20 [ 5381.660480] [<ffffffff81144995>] __alloc_pages_nodemask+0x365/0xad0 [ 5381.660487] [<ffffffff8108313f>] ? local_clock+0x4f/0x60 [ 5381.660491] [<ffffffff811430e8>] ? free_one_page+0x98/0x440 [ 5381.660495] [<ffffffff8108313f>] ? local_clock+0x4f/0x60 [ 5381.660502] [<ffffffff8113fae4>] ? __get_free_pages+0x14/0x50 [ 5381.660508] [<ffffffff81095fb8>] ? trace_hardirqs_off_caller+0x28/0xd0 [ 5381.660515] [<ffffffff81183caf>] alloc_pages_current+0x10f/0x1f0 [ 5381.660520] [<ffffffff8113fae4>] ? __get_free_pages+0x14/0x50 [ 5381.660524] [<ffffffff8113fae4>] __get_free_pages+0x14/0x50 [ 5381.660530] [<ffffffff8115dace>] kmalloc_order_trace+0x3e/0x100 [ 5381.660536] [<ffffffff81191ea0>] __kmalloc_track_caller+0x220/0x230 [ 5381.660560] [<ffffffffa0729fdb>] ? fs_path_ensure_buf.part.12+0x6b/0x200 [btrfs] [ 5381.660564] [<ffffffff8178085c>] ? retint_restore_args+0xe/0xe [ 5381.660569] [<ffffffff811580ef>] krealloc+0x6f/0xb0 [ 5381.660586] [<ffffffffa0729fdb>] fs_path_ensure_buf.part.12+0x6b/0x200 [btrfs] [ 5381.660601] [<ffffffffa072a208>] fs_path_prepare_for_add+0x98/0xb0 [btrfs] [ 5381.660615] [<ffffffffa072a2bc>] fs_path_add_path+0x2c/0x60 [btrfs] [ 5381.660628] [<ffffffffa072c55c>] get_cur_path+0x7c/0x1c0 [btrfs] Even without this loop, the incremental send couldn't succeed, because it would attempt to send a rename/move operation for the lower inode before the highest inode number was renamed/move. This issue is easy to trigger with the following steps: $ mkfs.btrfs -f /dev/sdb3 $ mount /dev/sdb3 /mnt/btrfs $ mkdir -p /mnt/btrfs/a/b/c/d $ mkdir /mnt/btrfs/a/b/c2 $ btrfs subvol snapshot -r /mnt/btrfs /mnt/btrfs/snap1 $ mv /mnt/btrfs/a/b/c/d /mnt/btrfs/a/b/c2/d2 $ mv /mnt/btrfs/a/b/c /mnt/btrfs/a/b/c2/d2/cc $ btrfs subvol snapshot -r /mnt/btrfs /mnt/btrfs/snap2 $ btrfs send -p /mnt/btrfs/snap1 /mnt/btrfs/snap2 > /tmp/incremental.send The structure of the filesystem when the first snapshot is taken is: . (ino 256) |-- a (ino 257) |-- b (ino 258) |-- c (ino 259) | |-- d (ino 260) | |-- c2 (ino 261) And its structure when the second snapshot is taken is: . (ino 256) |-- a (ino 257) |-- b (ino 258) |-- c2 (ino 261) |-- d2 (ino 260) |-- cc (ino 259) Before the move/rename operation is performed for the inode 259, the move/rename for inode 260 must be performed, since 259 is now a child of 260. A test case for xfstests, with a more complex scenario, will follow soon. Signed-off-by: Filipe David Borba Manana <fdmanana@gmail.com> Signed-off-by: Josef Bacik <jbacik@fb.com> Signed-off-by: Chris Mason <clm@fb.com>
2014-01-22 10:00:53 +00:00
Btrfs: fix send attempting to rmdir non-empty directories The incremental send algorithm assumed that it was possible to issue a directory remove (rmdir) if the the inode number it was currently processing was greater than (or equal) to any inode that referenced the directory's inode. This wasn't a valid assumption because any such inode might be a child directory that is pending a move/rename operation, because it was moved into a directory that has a higher inode number and was moved/renamed too - in other words, the case the following commit addressed: 9f03740a956d7ac6a1b8f8c455da6fa5cae11c22 (Btrfs: fix infinite path build loops in incremental send) This made an incremental send issue an rmdir operation before the target directory was actually empty, which made btrfs receive fail. Therefore it needs to wait for all pending child directory inodes to be moved/renamed before sending an rmdir operation. Simple steps to reproduce this issue: $ mkfs.btrfs -f /dev/sdb3 $ mount /dev/sdb3 /mnt/btrfs $ mkdir -p /mnt/btrfs/a/b/c/x $ mkdir /mnt/btrfs/a/b/y $ btrfs subvolume snapshot -r /mnt/btrfs /mnt/btrfs/snap1 $ btrfs send /mnt/btrfs/snap1 -f /tmp/base.send $ mv /mnt/btrfs/a/b/y /mnt/btrfs/a/b/YY $ mv /mnt/btrfs/a/b/c/x /mnt/btrfs/a/b/YY $ rmdir /mnt/btrfs/a/b/c $ btrfs subvolume snapshot -r /mnt/btrfs /mnt/btrfs/snap2 $ btrfs send -p /mnt/btrfs/snap1 /mnt/btrfs/snap2 -f /tmp/incremental.send $ umount /mnt/btrfs $ mkfs.btrfs -f /dev/sdb3 $ mount /dev/sdb3 /mnt/btrfs $ btrfs receive /mnt/btrfs -f /tmp/base.send $ btrfs receive /mnt/btrfs -f /tmp/incremental.send The second btrfs receive command failed with: ERROR: rmdir o259-6-0 failed. Directory not empty A test case for xfstests follows. Signed-off-by: Filipe David Borba Manana <fdmanana@gmail.com> Signed-off-by: Josef Bacik <jbacik@fb.com>
2014-02-19 14:31:44 +00:00
Btrfs: fix infinite path build loops in incremental send The send operation processes inodes by their ascending number, and assumes that any rename/move operation can be successfully performed (sent to the caller) once all previous inodes (those with a smaller inode number than the one we're currently processing) were processed. This is not true when an incremental send had to process an hierarchical change between 2 snapshots where the parent-children relationship between directory inodes was reversed - that is, parents became children and children became parents. This situation made the path building code go into an infinite loop, which kept allocating more and more memory that eventually lead to a krealloc warning being displayed in dmesg: WARNING: CPU: 1 PID: 5705 at mm/page_alloc.c:2477 __alloc_pages_nodemask+0x365/0xad0() Modules linked in: btrfs raid6_pq xor pci_stub vboxpci(O) vboxnetadp(O) vboxnetflt(O) vboxdrv(O) snd_hda_codec_hdmi snd_hda_codec_realtek joydev radeon snd_hda_intel snd_hda_codec snd_hwdep snd_seq_midi snd_pcm psmouse i915 snd_rawmidi serio_raw snd_seq_midi_event lpc_ich snd_seq snd_timer ttm snd_seq_device rfcomm drm_kms_helper parport_pc bnep bluetooth drm ppdev snd soundcore i2c_algo_bit snd_page_alloc binfmt_misc video lp parport r8169 mii hid_generic usbhid hid CPU: 1 PID: 5705 Comm: btrfs Tainted: G O 3.13.0-rc7-fdm-btrfs-next-18+ #3 Hardware name: To Be Filled By O.E.M. To Be Filled By O.E.M./Z77 Pro4, BIOS P1.50 09/04/2012 [ 5381.660441] 00000000000009ad ffff8806f6f2f4e8 ffffffff81777434 0000000000000007 [ 5381.660447] 0000000000000000 ffff8806f6f2f528 ffffffff8104a9ec ffff8807038f36f0 [ 5381.660452] 0000000000000000 0000000000000206 ffff8807038f2490 ffff8807038f36f0 [ 5381.660457] Call Trace: [ 5381.660464] [<ffffffff81777434>] dump_stack+0x4e/0x68 [ 5381.660471] [<ffffffff8104a9ec>] warn_slowpath_common+0x8c/0xc0 [ 5381.660476] [<ffffffff8104aa3a>] warn_slowpath_null+0x1a/0x20 [ 5381.660480] [<ffffffff81144995>] __alloc_pages_nodemask+0x365/0xad0 [ 5381.660487] [<ffffffff8108313f>] ? local_clock+0x4f/0x60 [ 5381.660491] [<ffffffff811430e8>] ? free_one_page+0x98/0x440 [ 5381.660495] [<ffffffff8108313f>] ? local_clock+0x4f/0x60 [ 5381.660502] [<ffffffff8113fae4>] ? __get_free_pages+0x14/0x50 [ 5381.660508] [<ffffffff81095fb8>] ? trace_hardirqs_off_caller+0x28/0xd0 [ 5381.660515] [<ffffffff81183caf>] alloc_pages_current+0x10f/0x1f0 [ 5381.660520] [<ffffffff8113fae4>] ? __get_free_pages+0x14/0x50 [ 5381.660524] [<ffffffff8113fae4>] __get_free_pages+0x14/0x50 [ 5381.660530] [<ffffffff8115dace>] kmalloc_order_trace+0x3e/0x100 [ 5381.660536] [<ffffffff81191ea0>] __kmalloc_track_caller+0x220/0x230 [ 5381.660560] [<ffffffffa0729fdb>] ? fs_path_ensure_buf.part.12+0x6b/0x200 [btrfs] [ 5381.660564] [<ffffffff8178085c>] ? retint_restore_args+0xe/0xe [ 5381.660569] [<ffffffff811580ef>] krealloc+0x6f/0xb0 [ 5381.660586] [<ffffffffa0729fdb>] fs_path_ensure_buf.part.12+0x6b/0x200 [btrfs] [ 5381.660601] [<ffffffffa072a208>] fs_path_prepare_for_add+0x98/0xb0 [btrfs] [ 5381.660615] [<ffffffffa072a2bc>] fs_path_add_path+0x2c/0x60 [btrfs] [ 5381.660628] [<ffffffffa072c55c>] get_cur_path+0x7c/0x1c0 [btrfs] Even without this loop, the incremental send couldn't succeed, because it would attempt to send a rename/move operation for the lower inode before the highest inode number was renamed/move. This issue is easy to trigger with the following steps: $ mkfs.btrfs -f /dev/sdb3 $ mount /dev/sdb3 /mnt/btrfs $ mkdir -p /mnt/btrfs/a/b/c/d $ mkdir /mnt/btrfs/a/b/c2 $ btrfs subvol snapshot -r /mnt/btrfs /mnt/btrfs/snap1 $ mv /mnt/btrfs/a/b/c/d /mnt/btrfs/a/b/c2/d2 $ mv /mnt/btrfs/a/b/c /mnt/btrfs/a/b/c2/d2/cc $ btrfs subvol snapshot -r /mnt/btrfs /mnt/btrfs/snap2 $ btrfs send -p /mnt/btrfs/snap1 /mnt/btrfs/snap2 > /tmp/incremental.send The structure of the filesystem when the first snapshot is taken is: . (ino 256) |-- a (ino 257) |-- b (ino 258) |-- c (ino 259) | |-- d (ino 260) | |-- c2 (ino 261) And its structure when the second snapshot is taken is: . (ino 256) |-- a (ino 257) |-- b (ino 258) |-- c2 (ino 261) |-- d2 (ino 260) |-- cc (ino 259) Before the move/rename operation is performed for the inode 259, the move/rename for inode 260 must be performed, since 259 is now a child of 260. A test case for xfstests, with a more complex scenario, will follow soon. Signed-off-by: Filipe David Borba Manana <fdmanana@gmail.com> Signed-off-by: Josef Bacik <jbacik@fb.com> Signed-off-by: Chris Mason <clm@fb.com>
2014-01-22 10:00:53 +00:00
Btrfs: incremental send, fix invalid path after dir rename This fixes yet one more case not caught by the commit titled: Btrfs: fix infinite path build loops in incremental send In this case, even before the initial full send, we have a directory which is a child of a directory with a higher inode number. Then we perform the initial send, and after we rename both the child and the parent, without moving them around. After doing these 2 renames, an incremental send sent a rename instruction for the child directory which contained an invalid "from" path (referenced the parent's old name, not the new one), which made the btrfs receive command fail. Steps to reproduce: $ mkfs.btrfs -f /dev/sdb3 $ mount /dev/sdb3 /mnt/btrfs $ mkdir -p /mnt/btrfs/a/b $ mkdir /mnt/btrfs/d $ mkdir /mnt/btrfs/a/b/c $ mv /mnt/btrfs/d /mnt/btrfs/a/b/c $ btrfs subvolume snapshot -r /mnt/btrfs /mnt/btrfs/snap1 $ btrfs send /mnt/btrfs/snap1 -f /tmp/base.send $ mv /mnt/btrfs/a/b/c /mnt/btrfs/a/b/x $ mv /mnt/btrfs/a/b/x/d /mnt/btrfs/a/b/x/y $ btrfs subvolume snapshot -r /mnt/btrfs /mnt/btrfs/snap2 $ btrfs send -p /mnt/btrfs/snap1 /mnt/btrfs/snap2 -f /tmp/incremental.send $ umout /mnt/btrfs $ mkfs.btrfs -f /dev/sdb3 $ mount /dev/sdb3 /mnt/btrfs $ btrfs receive /mnt/btrfs -f /tmp/base.send $ btrfs receive /mnt/btrfs -f /tmp/incremental.send The second btrfs receive command failed with: "ERROR: rename a/b/c/d -> a/b/x/y failed. No such file or directory" A test case for xfstests follows. Signed-off-by: Filipe David Borba Manana <fdmanana@gmail.com> Signed-off-by: Josef Bacik <jbacik@fb.com>
2014-02-16 13:43:11 +00:00
Btrfs: fix infinite path build loops in incremental send The send operation processes inodes by their ascending number, and assumes that any rename/move operation can be successfully performed (sent to the caller) once all previous inodes (those with a smaller inode number than the one we're currently processing) were processed. This is not true when an incremental send had to process an hierarchical change between 2 snapshots where the parent-children relationship between directory inodes was reversed - that is, parents became children and children became parents. This situation made the path building code go into an infinite loop, which kept allocating more and more memory that eventually lead to a krealloc warning being displayed in dmesg: WARNING: CPU: 1 PID: 5705 at mm/page_alloc.c:2477 __alloc_pages_nodemask+0x365/0xad0() Modules linked in: btrfs raid6_pq xor pci_stub vboxpci(O) vboxnetadp(O) vboxnetflt(O) vboxdrv(O) snd_hda_codec_hdmi snd_hda_codec_realtek joydev radeon snd_hda_intel snd_hda_codec snd_hwdep snd_seq_midi snd_pcm psmouse i915 snd_rawmidi serio_raw snd_seq_midi_event lpc_ich snd_seq snd_timer ttm snd_seq_device rfcomm drm_kms_helper parport_pc bnep bluetooth drm ppdev snd soundcore i2c_algo_bit snd_page_alloc binfmt_misc video lp parport r8169 mii hid_generic usbhid hid CPU: 1 PID: 5705 Comm: btrfs Tainted: G O 3.13.0-rc7-fdm-btrfs-next-18+ #3 Hardware name: To Be Filled By O.E.M. To Be Filled By O.E.M./Z77 Pro4, BIOS P1.50 09/04/2012 [ 5381.660441] 00000000000009ad ffff8806f6f2f4e8 ffffffff81777434 0000000000000007 [ 5381.660447] 0000000000000000 ffff8806f6f2f528 ffffffff8104a9ec ffff8807038f36f0 [ 5381.660452] 0000000000000000 0000000000000206 ffff8807038f2490 ffff8807038f36f0 [ 5381.660457] Call Trace: [ 5381.660464] [<ffffffff81777434>] dump_stack+0x4e/0x68 [ 5381.660471] [<ffffffff8104a9ec>] warn_slowpath_common+0x8c/0xc0 [ 5381.660476] [<ffffffff8104aa3a>] warn_slowpath_null+0x1a/0x20 [ 5381.660480] [<ffffffff81144995>] __alloc_pages_nodemask+0x365/0xad0 [ 5381.660487] [<ffffffff8108313f>] ? local_clock+0x4f/0x60 [ 5381.660491] [<ffffffff811430e8>] ? free_one_page+0x98/0x440 [ 5381.660495] [<ffffffff8108313f>] ? local_clock+0x4f/0x60 [ 5381.660502] [<ffffffff8113fae4>] ? __get_free_pages+0x14/0x50 [ 5381.660508] [<ffffffff81095fb8>] ? trace_hardirqs_off_caller+0x28/0xd0 [ 5381.660515] [<ffffffff81183caf>] alloc_pages_current+0x10f/0x1f0 [ 5381.660520] [<ffffffff8113fae4>] ? __get_free_pages+0x14/0x50 [ 5381.660524] [<ffffffff8113fae4>] __get_free_pages+0x14/0x50 [ 5381.660530] [<ffffffff8115dace>] kmalloc_order_trace+0x3e/0x100 [ 5381.660536] [<ffffffff81191ea0>] __kmalloc_track_caller+0x220/0x230 [ 5381.660560] [<ffffffffa0729fdb>] ? fs_path_ensure_buf.part.12+0x6b/0x200 [btrfs] [ 5381.660564] [<ffffffff8178085c>] ? retint_restore_args+0xe/0xe [ 5381.660569] [<ffffffff811580ef>] krealloc+0x6f/0xb0 [ 5381.660586] [<ffffffffa0729fdb>] fs_path_ensure_buf.part.12+0x6b/0x200 [btrfs] [ 5381.660601] [<ffffffffa072a208>] fs_path_prepare_for_add+0x98/0xb0 [btrfs] [ 5381.660615] [<ffffffffa072a2bc>] fs_path_add_path+0x2c/0x60 [btrfs] [ 5381.660628] [<ffffffffa072c55c>] get_cur_path+0x7c/0x1c0 [btrfs] Even without this loop, the incremental send couldn't succeed, because it would attempt to send a rename/move operation for the lower inode before the highest inode number was renamed/move. This issue is easy to trigger with the following steps: $ mkfs.btrfs -f /dev/sdb3 $ mount /dev/sdb3 /mnt/btrfs $ mkdir -p /mnt/btrfs/a/b/c/d $ mkdir /mnt/btrfs/a/b/c2 $ btrfs subvol snapshot -r /mnt/btrfs /mnt/btrfs/snap1 $ mv /mnt/btrfs/a/b/c/d /mnt/btrfs/a/b/c2/d2 $ mv /mnt/btrfs/a/b/c /mnt/btrfs/a/b/c2/d2/cc $ btrfs subvol snapshot -r /mnt/btrfs /mnt/btrfs/snap2 $ btrfs send -p /mnt/btrfs/snap1 /mnt/btrfs/snap2 > /tmp/incremental.send The structure of the filesystem when the first snapshot is taken is: . (ino 256) |-- a (ino 257) |-- b (ino 258) |-- c (ino 259) | |-- d (ino 260) | |-- c2 (ino 261) And its structure when the second snapshot is taken is: . (ino 256) |-- a (ino 257) |-- b (ino 258) |-- c2 (ino 261) |-- d2 (ino 260) |-- cc (ino 259) Before the move/rename operation is performed for the inode 259, the move/rename for inode 260 must be performed, since 259 is now a child of 260. A test case for xfstests, with a more complex scenario, will follow soon. Signed-off-by: Filipe David Borba Manana <fdmanana@gmail.com> Signed-off-by: Josef Bacik <jbacik@fb.com> Signed-off-by: Chris Mason <clm@fb.com>
2014-01-22 10:00:53 +00:00
Btrfs: incremental send, don't rename a directory too soon There's one more case where we can't issue a rename operation for a directory as soon as we process it. We used to delay directory renames only if they have some ancestor directory with a higher inode number that got renamed too, but there's another case where we need to delay the rename too - when a directory A is renamed to the old name of a directory B but that directory B has its rename delayed because it has now (in the send root) an ancestor with a higher inode number that was renamed. If we don't delay the directory rename in this case, the receiving end of the send stream will attempt to rename A to the old name of B before B got renamed to its new name, which results in a "directory not empty" error. So fix this by delaying directory renames for this case too. Steps to reproduce: $ mkfs.btrfs -f /dev/sdb $ mount /dev/sdb /mnt $ mkdir /mnt/a $ mkdir /mnt/b $ mkdir /mnt/c $ touch /mnt/a/file $ btrfs subvolume snapshot -r /mnt /mnt/snap1 $ mv /mnt/c /mnt/x $ mv /mnt/a /mnt/x/y $ mv /mnt/b /mnt/a $ btrfs subvolume snapshot -r /mnt /mnt/snap2 $ btrfs send /mnt/snap1 -f /tmp/1.send $ btrfs send -p /mnt/snap1 /mnt/snap2 -f /tmp/2.send $ mkfs.btrfs -f /dev/sdc $ mount /dev/sdc /mnt2 $ btrfs receive /mnt2 -f /tmp/1.send $ btrfs receive /mnt2 -f /tmp/2.send ERROR: rename b -> a failed. Directory not empty A test case for xfstests follows soon. Reported-by: Ames Cornish <ames@cornishes.net> Signed-off-by: Filipe Manana <fdmanana@suse.com> Signed-off-by: Chris Mason <clm@fb.com>
2015-02-28 22:29:22 +00:00
Btrfs: incremental send, don't delay directory renames unnecessarily Even though we delay the rename of directories when they become descendents of other directories that were also renamed in the send root to prevent infinite path build loops, we were doing it in cases where this was not needed and was actually harmful resulting in infinite path build loops as we ended up with a circular dependency of delayed directory renames. Consider the following reproducer: $ mkfs.btrfs -f /dev/sdb $ mount /dev/sdb /mnt $ mkfs.btrfs -f /dev/sdc $ mount /dev/sdc /mnt2 $ mkdir /mnt/data $ mkdir /mnt/data/n1 $ mkdir /mnt/data/n1/n2 $ mkdir /mnt/data/n4 $ mkdir /mnt/data/n1/n2/p1 $ mkdir /mnt/data/n1/n2/p1/p2 $ mkdir /mnt/data/t6 $ mkdir /mnt/data/t7 $ mkdir -p /mnt/data/t5/t7 $ mkdir /mnt/data/t2 $ mkdir /mnt/data/t4 $ mkdir -p /mnt/data/t1/t3 $ mkdir /mnt/data/p1 $ mv /mnt/data/t1 /mnt/data/p1 $ mkdir -p /mnt/data/p1/p2 $ mv /mnt/data/t4 /mnt/data/p1/p2/t1 $ mv /mnt/data/t5 /mnt/data/n4/t5 $ mv /mnt/data/n1/n2/p1/p2 /mnt/data/n4/t5/p2 $ mv /mnt/data/t7 /mnt/data/n4/t5/p2/t7 $ mv /mnt/data/t2 /mnt/data/n4/t1 $ mv /mnt/data/p1 /mnt/data/n4/t5/p2/p1 $ mv /mnt/data/n1/n2 /mnt/data/n4/t5/p2/p1/p2/n2 $ mv /mnt/data/n4/t5/p2/p1/p2/t1 /mnt/data/n4/t5/p2/p1/p2/n2/t1 $ mv /mnt/data/n4/t5/t7 /mnt/data/n4/t5/p2/p1/p2/n2/t1/t7 $ mv /mnt/data/n4/t5/p2/p1/t1/t3 /mnt/data/n4/t5/p2/p1/p2/n2/t1/t3 $ mv /mnt/data/n4/t5/p2/p1/p2/n2/p1 /mnt/data/n4/t5/p2/p1/p2/n2/t1/t7/p1 $ mv /mnt/data/t6 /mnt/data/n4/t5/p2/p1/p2/n2/t1/t3/t5 $ mv /mnt/data/n4/t5/p2/p1/t1 /mnt/data/n4/t5/p2/p1/p2/n2/t1/t3/t1 $ mv /mnt/data/n1 /mnt/data/n4/t5/p2/p1/p2/n2/t1/t7/p1/n1 $ btrfs subvolume snapshot -r /mnt /mnt/snap1 $ mv /mnt/data/n4/t1 /mnt/data/n4/t5/p2/p1/p2/n2/t1/t7/p1/t1 $ mv /mnt/data/n4/t5/p2/p1/p2/n2/t1 /mnt/data/n4/ $ mv /mnt/data/n4/t5/p2/p1/p2/n2 /mnt/data/n4/t1/n2 $ mv /mnt/data/n4/t1/t7/p1 /mnt/data/n4/t1/n2/p1 $ mv /mnt/data/n4/t1/t3/t1 /mnt/data/n4/t1/n2/t1 $ mv /mnt/data/n4/t1/t3 /mnt/data/n4/t1/n2/t1/t3 $ mv /mnt/data/n4/t5/p2/p1/p2 /mnt/data/n4/t1/n2/p1/p2 $ mv /mnt/data/n4/t1/t7 /mnt/data/n4/t1/n2/p1/t7 $ mv /mnt/data/n4/t5/p2/p1 /mnt/data/n4/t1/n2/p1/p2/p1 $ mv /mnt/data/n4/t1/n2/t1/t3/t5 /mnt/data/n4/t1/n2/p1/p2/t5 $ mv /mnt/data/n4/t5 /mnt/data/n4/t1/n2/p1/p2/p1/t5 $ mv /mnt/data/n4/t1/n2/p1/p2/p1/t5/p2 /mnt/data/n4/t1/n2/p1/p2/p1/p2 $ mv /mnt/data/n4/t1/n2/p1/p2/p1/p2/t7 /mnt/data/n4/t1/t7 $ btrfs subvolume snapshot -r /mnt /mnt/snap2 $ btrfs send /mnt/snap1 | btrfs receive /mnt2 $ btrfs send -p /mnt/snap1 /mnt/snap2 | btrfs receive -vv /mnt2 ERROR: send ioctl failed with -12: Cannot allocate memory This reproducer resulted in an infinite path build loop when building the path for inode 266 because the following circular dependency of delayed directory renames was created: ino 272 <- ino 261 <- ino 259 <- ino 268 <- ino 267 <- ino 261 Where the notation "X <- Y" means the rename of inode X is delayed by the rename of inode Y (X will be renamed after Y is renamed). This resulted in an infinite path build loop of inode 266 because that inode has inode 261 as an ancestor in the send root and inode 261 is in the circular dependency of delayed renames listed above. Fix this by not delaying the rename of a directory inode if an ancestor of the inode in the send root, which has a delayed rename operation, is not also a descendent of the inode in the parent root. Thanks to Robbie Ko for sending the reproducer example. A test case for xfstests follows soon. Reported-by: Robbie Ko <robbieko@synology.com> Signed-off-by: Filipe Manana <fdmanana@suse.com>
2015-03-27 17:50:45 +00:00
Btrfs: fix infinite path build loops in incremental send The send operation processes inodes by their ascending number, and assumes that any rename/move operation can be successfully performed (sent to the caller) once all previous inodes (those with a smaller inode number than the one we're currently processing) were processed. This is not true when an incremental send had to process an hierarchical change between 2 snapshots where the parent-children relationship between directory inodes was reversed - that is, parents became children and children became parents. This situation made the path building code go into an infinite loop, which kept allocating more and more memory that eventually lead to a krealloc warning being displayed in dmesg: WARNING: CPU: 1 PID: 5705 at mm/page_alloc.c:2477 __alloc_pages_nodemask+0x365/0xad0() Modules linked in: btrfs raid6_pq xor pci_stub vboxpci(O) vboxnetadp(O) vboxnetflt(O) vboxdrv(O) snd_hda_codec_hdmi snd_hda_codec_realtek joydev radeon snd_hda_intel snd_hda_codec snd_hwdep snd_seq_midi snd_pcm psmouse i915 snd_rawmidi serio_raw snd_seq_midi_event lpc_ich snd_seq snd_timer ttm snd_seq_device rfcomm drm_kms_helper parport_pc bnep bluetooth drm ppdev snd soundcore i2c_algo_bit snd_page_alloc binfmt_misc video lp parport r8169 mii hid_generic usbhid hid CPU: 1 PID: 5705 Comm: btrfs Tainted: G O 3.13.0-rc7-fdm-btrfs-next-18+ #3 Hardware name: To Be Filled By O.E.M. To Be Filled By O.E.M./Z77 Pro4, BIOS P1.50 09/04/2012 [ 5381.660441] 00000000000009ad ffff8806f6f2f4e8 ffffffff81777434 0000000000000007 [ 5381.660447] 0000000000000000 ffff8806f6f2f528 ffffffff8104a9ec ffff8807038f36f0 [ 5381.660452] 0000000000000000 0000000000000206 ffff8807038f2490 ffff8807038f36f0 [ 5381.660457] Call Trace: [ 5381.660464] [<ffffffff81777434>] dump_stack+0x4e/0x68 [ 5381.660471] [<ffffffff8104a9ec>] warn_slowpath_common+0x8c/0xc0 [ 5381.660476] [<ffffffff8104aa3a>] warn_slowpath_null+0x1a/0x20 [ 5381.660480] [<ffffffff81144995>] __alloc_pages_nodemask+0x365/0xad0 [ 5381.660487] [<ffffffff8108313f>] ? local_clock+0x4f/0x60 [ 5381.660491] [<ffffffff811430e8>] ? free_one_page+0x98/0x440 [ 5381.660495] [<ffffffff8108313f>] ? local_clock+0x4f/0x60 [ 5381.660502] [<ffffffff8113fae4>] ? __get_free_pages+0x14/0x50 [ 5381.660508] [<ffffffff81095fb8>] ? trace_hardirqs_off_caller+0x28/0xd0 [ 5381.660515] [<ffffffff81183caf>] alloc_pages_current+0x10f/0x1f0 [ 5381.660520] [<ffffffff8113fae4>] ? __get_free_pages+0x14/0x50 [ 5381.660524] [<ffffffff8113fae4>] __get_free_pages+0x14/0x50 [ 5381.660530] [<ffffffff8115dace>] kmalloc_order_trace+0x3e/0x100 [ 5381.660536] [<ffffffff81191ea0>] __kmalloc_track_caller+0x220/0x230 [ 5381.660560] [<ffffffffa0729fdb>] ? fs_path_ensure_buf.part.12+0x6b/0x200 [btrfs] [ 5381.660564] [<ffffffff8178085c>] ? retint_restore_args+0xe/0xe [ 5381.660569] [<ffffffff811580ef>] krealloc+0x6f/0xb0 [ 5381.660586] [<ffffffffa0729fdb>] fs_path_ensure_buf.part.12+0x6b/0x200 [btrfs] [ 5381.660601] [<ffffffffa072a208>] fs_path_prepare_for_add+0x98/0xb0 [btrfs] [ 5381.660615] [<ffffffffa072a2bc>] fs_path_add_path+0x2c/0x60 [btrfs] [ 5381.660628] [<ffffffffa072c55c>] get_cur_path+0x7c/0x1c0 [btrfs] Even without this loop, the incremental send couldn't succeed, because it would attempt to send a rename/move operation for the lower inode before the highest inode number was renamed/move. This issue is easy to trigger with the following steps: $ mkfs.btrfs -f /dev/sdb3 $ mount /dev/sdb3 /mnt/btrfs $ mkdir -p /mnt/btrfs/a/b/c/d $ mkdir /mnt/btrfs/a/b/c2 $ btrfs subvol snapshot -r /mnt/btrfs /mnt/btrfs/snap1 $ mv /mnt/btrfs/a/b/c/d /mnt/btrfs/a/b/c2/d2 $ mv /mnt/btrfs/a/b/c /mnt/btrfs/a/b/c2/d2/cc $ btrfs subvol snapshot -r /mnt/btrfs /mnt/btrfs/snap2 $ btrfs send -p /mnt/btrfs/snap1 /mnt/btrfs/snap2 > /tmp/incremental.send The structure of the filesystem when the first snapshot is taken is: . (ino 256) |-- a (ino 257) |-- b (ino 258) |-- c (ino 259) | |-- d (ino 260) | |-- c2 (ino 261) And its structure when the second snapshot is taken is: . (ino 256) |-- a (ino 257) |-- b (ino 258) |-- c2 (ino 261) |-- d2 (ino 260) |-- cc (ino 259) Before the move/rename operation is performed for the inode 259, the move/rename for inode 260 must be performed, since 259 is now a child of 260. A test case for xfstests, with a more complex scenario, will follow soon. Signed-off-by: Filipe David Borba Manana <fdmanana@gmail.com> Signed-off-by: Josef Bacik <jbacik@fb.com> Signed-off-by: Chris Mason <clm@fb.com>
2014-01-22 10:00:53 +00:00
Btrfs: incremental send, check if orphanized dir inode needs delayed rename If a directory inode is orphanized, because some inode previously processed has a new name that collides with the old name of the current inode, we need to check if it needs its rename operation delayed too, as its ancestor-descendent relationship with some other inode might have been reversed between the parent and send snapshots and therefore its rename operation needs to happen after that other inode is renamed. For example, for the following reproducer where this is needed (provided by Robbie Ko): $ mkfs.btrfs -f /dev/sdb $ mount /dev/sdb /mnt $ mkfs.btrfs -f /dev/sdc $ mount /dev/sdc /mnt2 $ mkdir -p /mnt/data/n1/n2 $ mkdir /mnt/data/n4 $ mkdir -p /mnt/data/t6/t7 $ mkdir /mnt/data/t5 $ mkdir /mnt/data/t7 $ mkdir /mnt/data/n4/t2 $ mkdir /mnt/data/t4 $ mkdir /mnt/data/t3 $ mv /mnt/data/t7 /mnt/data/n4/t2 $ mv /mnt/data/t4 /mnt/data/n4/t2/t7 $ mv /mnt/data/t5 /mnt/data/n4/t2/t7/t4 $ mv /mnt/data/t6 /mnt/data/n4/t2/t7/t4/t5 $ mv /mnt/data/n1/n2 /mnt/data/n4/t2/t7/t4/t5/t6 $ mv /mnt/data/n1 /mnt/data/n4/t2/t7/t4/t5/t6 $ mv /mnt/data/n4/t2/t7/t4/t5/t6/t7 /mnt/data/n4/t2/t7/t4/t5/t6/n2 $ mv /mnt/data/t3 /mnt/data/n4/t2/t7/t4/t5/t6/n2/t7 $ btrfs subvolume snapshot -r /mnt /mnt/snap1 $ mv /mnt/data/n4/t2/t7/t4/t5/t6/n1 /mnt/data/n4 $ mv /mnt/data/n4/t2 /mnt/data/n4/n1 $ mv /mnt/data/n4/n1/t2/t7/t4/t5/t6/n2 /mnt/data/n4/n1/t2 $ mv /mnt/data/n4/n1/t2/n2/t7/t3 /mnt/data/n4/n1/t2 $ mv /mnt/data/n4/n1/t2/t7/t4/t5/t6 /mnt/data/n4/n1/t2 $ mv /mnt/data/n4/n1/t2/t7/t4 /mnt/data/n4/n1/t2/t6 $ mv /mnt/data/n4/n1/t2/t7 /mnt/data/n4/n1/t2/t3 $ mv /mnt/data/n4/n1/t2/n2/t7 /mnt/data/n4/n1/t2 $ btrfs subvolume snapshot -r /mnt /mnt/snap2 $ btrfs send /mnt/snap1 | btrfs receive /mnt2 $ btrfs send -p /mnt/snap1 /mnt/snap2 | btrfs receive /mnt2 ERROR: send ioctl failed with -12: Cannot allocate memory Where the parent snapshot directory hierarchy is the following: . (ino 256) |-- data/ (ino 257) |-- n4/ (ino 260) |-- t2/ (ino 265) |-- t7/ (ino 264) |-- t4/ (ino 266) |-- t5/ (ino 263) |-- t6/ (ino 261) |-- n1/ (ino 258) |-- n2/ (ino 259) |-- t7/ (ino 262) |-- t3/ (ino 267) And the send snapshot's directory hierarchy is the following: . (ino 256) |-- data/ (ino 257) |-- n4/ (ino 260) |-- n1/ (ino 258) |-- t2/ (ino 265) |-- n2/ (ino 259) |-- t3/ (ino 267) | |-- t7 (ino 264) | |-- t6/ (ino 261) | |-- t4/ (ino 266) | |-- t5/ (ino 263) | |-- t7/ (ino 262) While processing inode 262 we orphanize inode 264 and later attempt to rename inode 264 to its new name/location, which resulted in building an incorrect destination path string for the rename operation with the value "data/n4/t2/t7/t4/t5/t6/n2/t7/t3/t7". This rename operation must have been done only after inode 267 is processed and renamed, as the ancestor-descendent relationship between inodes 264 and 267 was reversed between both snapshots, because otherwise it results in an infinite loop when building the path string for inode 264 when we are processing an inode with a number larger than 264. That loop is the following: start inode 264, send progress of 265 for example parent of 264 -> 267 parent of 267 -> 262 parent of 262 -> 259 parent of 259 -> 261 parent of 261 -> 263 parent of 263 -> 266 parent of 266 -> 264 |--> back to first iteration while current path string length is <= PATH_MAX, and fail with -ENOMEM otherwise So fix this by making the check if we need to delay a directory rename regardless of the current inode having been orphanized or not. A test case for fstests follows soon. Thanks to Robbie Ko for providing a reproducer for this problem. Reported-by: Robbie Ko <robbieko@synology.com> Signed-off-by: Filipe Manana <fdmanana@suse.com>
2015-04-09 14:09:14 +01:00
Btrfs: fix infinite path build loops in incremental send The send operation processes inodes by their ascending number, and assumes that any rename/move operation can be successfully performed (sent to the caller) once all previous inodes (those with a smaller inode number than the one we're currently processing) were processed. This is not true when an incremental send had to process an hierarchical change between 2 snapshots where the parent-children relationship between directory inodes was reversed - that is, parents became children and children became parents. This situation made the path building code go into an infinite loop, which kept allocating more and more memory that eventually lead to a krealloc warning being displayed in dmesg: WARNING: CPU: 1 PID: 5705 at mm/page_alloc.c:2477 __alloc_pages_nodemask+0x365/0xad0() Modules linked in: btrfs raid6_pq xor pci_stub vboxpci(O) vboxnetadp(O) vboxnetflt(O) vboxdrv(O) snd_hda_codec_hdmi snd_hda_codec_realtek joydev radeon snd_hda_intel snd_hda_codec snd_hwdep snd_seq_midi snd_pcm psmouse i915 snd_rawmidi serio_raw snd_seq_midi_event lpc_ich snd_seq snd_timer ttm snd_seq_device rfcomm drm_kms_helper parport_pc bnep bluetooth drm ppdev snd soundcore i2c_algo_bit snd_page_alloc binfmt_misc video lp parport r8169 mii hid_generic usbhid hid CPU: 1 PID: 5705 Comm: btrfs Tainted: G O 3.13.0-rc7-fdm-btrfs-next-18+ #3 Hardware name: To Be Filled By O.E.M. To Be Filled By O.E.M./Z77 Pro4, BIOS P1.50 09/04/2012 [ 5381.660441] 00000000000009ad ffff8806f6f2f4e8 ffffffff81777434 0000000000000007 [ 5381.660447] 0000000000000000 ffff8806f6f2f528 ffffffff8104a9ec ffff8807038f36f0 [ 5381.660452] 0000000000000000 0000000000000206 ffff8807038f2490 ffff8807038f36f0 [ 5381.660457] Call Trace: [ 5381.660464] [<ffffffff81777434>] dump_stack+0x4e/0x68 [ 5381.660471] [<ffffffff8104a9ec>] warn_slowpath_common+0x8c/0xc0 [ 5381.660476] [<ffffffff8104aa3a>] warn_slowpath_null+0x1a/0x20 [ 5381.660480] [<ffffffff81144995>] __alloc_pages_nodemask+0x365/0xad0 [ 5381.660487] [<ffffffff8108313f>] ? local_clock+0x4f/0x60 [ 5381.660491] [<ffffffff811430e8>] ? free_one_page+0x98/0x440 [ 5381.660495] [<ffffffff8108313f>] ? local_clock+0x4f/0x60 [ 5381.660502] [<ffffffff8113fae4>] ? __get_free_pages+0x14/0x50 [ 5381.660508] [<ffffffff81095fb8>] ? trace_hardirqs_off_caller+0x28/0xd0 [ 5381.660515] [<ffffffff81183caf>] alloc_pages_current+0x10f/0x1f0 [ 5381.660520] [<ffffffff8113fae4>] ? __get_free_pages+0x14/0x50 [ 5381.660524] [<ffffffff8113fae4>] __get_free_pages+0x14/0x50 [ 5381.660530] [<ffffffff8115dace>] kmalloc_order_trace+0x3e/0x100 [ 5381.660536] [<ffffffff81191ea0>] __kmalloc_track_caller+0x220/0x230 [ 5381.660560] [<ffffffffa0729fdb>] ? fs_path_ensure_buf.part.12+0x6b/0x200 [btrfs] [ 5381.660564] [<ffffffff8178085c>] ? retint_restore_args+0xe/0xe [ 5381.660569] [<ffffffff811580ef>] krealloc+0x6f/0xb0 [ 5381.660586] [<ffffffffa0729fdb>] fs_path_ensure_buf.part.12+0x6b/0x200 [btrfs] [ 5381.660601] [<ffffffffa072a208>] fs_path_prepare_for_add+0x98/0xb0 [btrfs] [ 5381.660615] [<ffffffffa072a2bc>] fs_path_add_path+0x2c/0x60 [btrfs] [ 5381.660628] [<ffffffffa072c55c>] get_cur_path+0x7c/0x1c0 [btrfs] Even without this loop, the incremental send couldn't succeed, because it would attempt to send a rename/move operation for the lower inode before the highest inode number was renamed/move. This issue is easy to trigger with the following steps: $ mkfs.btrfs -f /dev/sdb3 $ mount /dev/sdb3 /mnt/btrfs $ mkdir -p /mnt/btrfs/a/b/c/d $ mkdir /mnt/btrfs/a/b/c2 $ btrfs subvol snapshot -r /mnt/btrfs /mnt/btrfs/snap1 $ mv /mnt/btrfs/a/b/c/d /mnt/btrfs/a/b/c2/d2 $ mv /mnt/btrfs/a/b/c /mnt/btrfs/a/b/c2/d2/cc $ btrfs subvol snapshot -r /mnt/btrfs /mnt/btrfs/snap2 $ btrfs send -p /mnt/btrfs/snap1 /mnt/btrfs/snap2 > /tmp/incremental.send The structure of the filesystem when the first snapshot is taken is: . (ino 256) |-- a (ino 257) |-- b (ino 258) |-- c (ino 259) | |-- d (ino 260) | |-- c2 (ino 261) And its structure when the second snapshot is taken is: . (ino 256) |-- a (ino 257) |-- b (ino 258) |-- c2 (ino 261) |-- d2 (ino 260) |-- cc (ino 259) Before the move/rename operation is performed for the inode 259, the move/rename for inode 260 must be performed, since 259 is now a child of 260. A test case for xfstests, with a more complex scenario, will follow soon. Signed-off-by: Filipe David Borba Manana <fdmanana@gmail.com> Signed-off-by: Josef Bacik <jbacik@fb.com> Signed-off-by: Chris Mason <clm@fb.com>
2014-01-22 10:00:53 +00:00
Btrfs: send, fix more issues related to directory renames This is a continuation of the previous changes titled: Btrfs: fix incremental send's decision to delay a dir move/rename Btrfs: part 2, fix incremental send's decision to delay a dir move/rename There's a few more cases where a directory rename/move must be delayed which was previously overlooked. If our immediate ancestor has a lower inode number than ours and it doesn't have a delayed rename/move operation associated to it, it doesn't mean there isn't any non-direct ancestor of our current inode that needs to be renamed/moved before our current inode (i.e. with a higher inode number than ours). So we can't stop the search if our immediate ancestor has a lower inode number than ours, we need to navigate the directory hierarchy upwards until we hit the root or: 1) find an ancestor with an higher inode number that was renamed/moved in the send root too (or already has a pending rename/move registered); 2) find an ancestor that is a new directory (higher inode number than ours and exists only in the send root). Reproducer for case 1) $ mkfs.btrfs -f /dev/sdd $ mount /dev/sdd /mnt $ mkdir -p /mnt/a/b $ mkdir -p /mnt/a/c/d $ mkdir /mnt/a/b/e $ mkdir /mnt/a/c/d/f $ mv /mnt/a/b /mnt/a/c/d/2b $ mkdir /mnt/a/x $ mkdir /mnt/a/y $ btrfs subvolume snapshot -r /mnt /mnt/snap1 $ btrfs send /mnt/snap1 -f /tmp/base.send $ mv /mnt/a/x /mnt/a/y $ mv /mnt/a/c/d/2b/e /mnt/a/c/d/2b/2e $ mv /mnt/a/c/d /mnt/a/h/2d $ mv /mnt/a/c /mnt/a/h/2d/2b/2c $ btrfs subvolume snapshot -r /mnt /mnt/snap2 $ btrfs send -p /mnt/snap1 /mnt/snap2 -f /tmp/incremental.send Simple reproducer for case 2) $ mkfs.btrfs -f /dev/sdd $ mount /dev/sdd /mnt $ mkdir -p /mnt/a/b $ mkdir /mnt/a/c $ mv /mnt/a/b /mnt/a/c/b2 $ mkdir /mnt/a/e $ btrfs subvolume snapshot -r /mnt /mnt/snap1 $ btrfs send /mnt/snap1 -f /tmp/base.send $ mv /mnt/a/c/b2 /mnt/a/e/b3 $ mkdir /mnt/a/e/b3/f $ mkdir /mnt/a/h $ mv /mnt/a/c /mnt/a/e/b3/f/c2 $ mv /mnt/a/e /mnt/a/h/e2 $ btrfs subvolume snapshot -r /mnt /mnt/snap2 $ btrfs send -p /mnt/snap1 /mnt/snap2 -f /tmp/incremental.send Another simple reproducer for case 2) $ mkfs.btrfs -f /dev/sdd $ mount /dev/sdd /mnt $ mkdir -p /mnt/a/b $ mkdir /mnt/a/c $ mkdir /mnt/a/b/d $ mkdir /mnt/a/c/e $ btrfs subvolume snapshot -r /mnt /mnt/snap1 $ btrfs send /mnt/snap1 -f /tmp/base.send $ mkdir /mnt/a/b/d/f $ mkdir /mnt/a/b/g $ mv /mnt/a/c/e /mnt/a/b/g/e2 $ mv /mnt/a/c /mnt/a/b/d/f/c2 $ mv /mnt/a/b/d/f /mnt/a/b/g/e2/f2 $ btrfs subvolume snapshot -r /mnt /mnt/snap2 $ btrfs send -p /mnt/snap1 /mnt/snap2 -f /tmp/incremental.send More complex reproducer for case 2) $ mkfs.btrfs -f /dev/sdd $ mount /dev/sdd /mnt $ mkdir -p /mnt/a/b $ mkdir -p /mnt/a/c/d $ mkdir /mnt/a/b/e $ mkdir /mnt/a/c/d/f $ mv /mnt/a/b /mnt/a/c/d/2b $ mkdir /mnt/a/x $ mkdir /mnt/a/y $ btrfs subvolume snapshot -r /mnt /mnt/snap1 $ btrfs send /mnt/snap1 -f /tmp/base.send $ mv /mnt/a/x /mnt/a/y $ mv /mnt/a/c/d/2b/e /mnt/a/c/d/2b/2e $ mv /mnt/a/c/d /mnt/a/h/2d $ mv /mnt/a/c /mnt/a/h/2d/2b/2c $ btrfs subvolume snapshot -r /mnt /mnt/snap2 $ btrfs send -p /mnt/snap1 /mnt/snap2 -f /tmp/incremental.send For both cases the incremental send would enter an infinite loop when building path strings. While solving these cases, this change also re-implements the code to detect when directory moves/renames should be delayed. Instead of dealing with several specific cases separately, it's now more generic handling all cases with a simple detection algorithm and if when applying a delayed move/rename there's a path loop detected, it further delays the move/rename registering a new ancestor inode as the dependency inode (so our rename happens after that ancestor is renamed). Tests for these cases is being added to xfstests too. Signed-off-by: Filipe David Borba Manana <fdmanana@gmail.com> Signed-off-by: Chris Mason <clm@fb.com>
2014-03-27 20:14:01 +00:00
Btrfs: fix infinite path build loops in incremental send The send operation processes inodes by their ascending number, and assumes that any rename/move operation can be successfully performed (sent to the caller) once all previous inodes (those with a smaller inode number than the one we're currently processing) were processed. This is not true when an incremental send had to process an hierarchical change between 2 snapshots where the parent-children relationship between directory inodes was reversed - that is, parents became children and children became parents. This situation made the path building code go into an infinite loop, which kept allocating more and more memory that eventually lead to a krealloc warning being displayed in dmesg: WARNING: CPU: 1 PID: 5705 at mm/page_alloc.c:2477 __alloc_pages_nodemask+0x365/0xad0() Modules linked in: btrfs raid6_pq xor pci_stub vboxpci(O) vboxnetadp(O) vboxnetflt(O) vboxdrv(O) snd_hda_codec_hdmi snd_hda_codec_realtek joydev radeon snd_hda_intel snd_hda_codec snd_hwdep snd_seq_midi snd_pcm psmouse i915 snd_rawmidi serio_raw snd_seq_midi_event lpc_ich snd_seq snd_timer ttm snd_seq_device rfcomm drm_kms_helper parport_pc bnep bluetooth drm ppdev snd soundcore i2c_algo_bit snd_page_alloc binfmt_misc video lp parport r8169 mii hid_generic usbhid hid CPU: 1 PID: 5705 Comm: btrfs Tainted: G O 3.13.0-rc7-fdm-btrfs-next-18+ #3 Hardware name: To Be Filled By O.E.M. To Be Filled By O.E.M./Z77 Pro4, BIOS P1.50 09/04/2012 [ 5381.660441] 00000000000009ad ffff8806f6f2f4e8 ffffffff81777434 0000000000000007 [ 5381.660447] 0000000000000000 ffff8806f6f2f528 ffffffff8104a9ec ffff8807038f36f0 [ 5381.660452] 0000000000000000 0000000000000206 ffff8807038f2490 ffff8807038f36f0 [ 5381.660457] Call Trace: [ 5381.660464] [<ffffffff81777434>] dump_stack+0x4e/0x68 [ 5381.660471] [<ffffffff8104a9ec>] warn_slowpath_common+0x8c/0xc0 [ 5381.660476] [<ffffffff8104aa3a>] warn_slowpath_null+0x1a/0x20 [ 5381.660480] [<ffffffff81144995>] __alloc_pages_nodemask+0x365/0xad0 [ 5381.660487] [<ffffffff8108313f>] ? local_clock+0x4f/0x60 [ 5381.660491] [<ffffffff811430e8>] ? free_one_page+0x98/0x440 [ 5381.660495] [<ffffffff8108313f>] ? local_clock+0x4f/0x60 [ 5381.660502] [<ffffffff8113fae4>] ? __get_free_pages+0x14/0x50 [ 5381.660508] [<ffffffff81095fb8>] ? trace_hardirqs_off_caller+0x28/0xd0 [ 5381.660515] [<ffffffff81183caf>] alloc_pages_current+0x10f/0x1f0 [ 5381.660520] [<ffffffff8113fae4>] ? __get_free_pages+0x14/0x50 [ 5381.660524] [<ffffffff8113fae4>] __get_free_pages+0x14/0x50 [ 5381.660530] [<ffffffff8115dace>] kmalloc_order_trace+0x3e/0x100 [ 5381.660536] [<ffffffff81191ea0>] __kmalloc_track_caller+0x220/0x230 [ 5381.660560] [<ffffffffa0729fdb>] ? fs_path_ensure_buf.part.12+0x6b/0x200 [btrfs] [ 5381.660564] [<ffffffff8178085c>] ? retint_restore_args+0xe/0xe [ 5381.660569] [<ffffffff811580ef>] krealloc+0x6f/0xb0 [ 5381.660586] [<ffffffffa0729fdb>] fs_path_ensure_buf.part.12+0x6b/0x200 [btrfs] [ 5381.660601] [<ffffffffa072a208>] fs_path_prepare_for_add+0x98/0xb0 [btrfs] [ 5381.660615] [<ffffffffa072a2bc>] fs_path_add_path+0x2c/0x60 [btrfs] [ 5381.660628] [<ffffffffa072c55c>] get_cur_path+0x7c/0x1c0 [btrfs] Even without this loop, the incremental send couldn't succeed, because it would attempt to send a rename/move operation for the lower inode before the highest inode number was renamed/move. This issue is easy to trigger with the following steps: $ mkfs.btrfs -f /dev/sdb3 $ mount /dev/sdb3 /mnt/btrfs $ mkdir -p /mnt/btrfs/a/b/c/d $ mkdir /mnt/btrfs/a/b/c2 $ btrfs subvol snapshot -r /mnt/btrfs /mnt/btrfs/snap1 $ mv /mnt/btrfs/a/b/c/d /mnt/btrfs/a/b/c2/d2 $ mv /mnt/btrfs/a/b/c /mnt/btrfs/a/b/c2/d2/cc $ btrfs subvol snapshot -r /mnt/btrfs /mnt/btrfs/snap2 $ btrfs send -p /mnt/btrfs/snap1 /mnt/btrfs/snap2 > /tmp/incremental.send The structure of the filesystem when the first snapshot is taken is: . (ino 256) |-- a (ino 257) |-- b (ino 258) |-- c (ino 259) | |-- d (ino 260) | |-- c2 (ino 261) And its structure when the second snapshot is taken is: . (ino 256) |-- a (ino 257) |-- b (ino 258) |-- c2 (ino 261) |-- d2 (ino 260) |-- cc (ino 259) Before the move/rename operation is performed for the inode 259, the move/rename for inode 260 must be performed, since 259 is now a child of 260. A test case for xfstests, with a more complex scenario, will follow soon. Signed-off-by: Filipe David Borba Manana <fdmanana@gmail.com> Signed-off-by: Josef Bacik <jbacik@fb.com> Signed-off-by: Chris Mason <clm@fb.com>
2014-01-22 10:00:53 +00:00
Btrfs: send, fix more issues related to directory renames This is a continuation of the previous changes titled: Btrfs: fix incremental send's decision to delay a dir move/rename Btrfs: part 2, fix incremental send's decision to delay a dir move/rename There's a few more cases where a directory rename/move must be delayed which was previously overlooked. If our immediate ancestor has a lower inode number than ours and it doesn't have a delayed rename/move operation associated to it, it doesn't mean there isn't any non-direct ancestor of our current inode that needs to be renamed/moved before our current inode (i.e. with a higher inode number than ours). So we can't stop the search if our immediate ancestor has a lower inode number than ours, we need to navigate the directory hierarchy upwards until we hit the root or: 1) find an ancestor with an higher inode number that was renamed/moved in the send root too (or already has a pending rename/move registered); 2) find an ancestor that is a new directory (higher inode number than ours and exists only in the send root). Reproducer for case 1) $ mkfs.btrfs -f /dev/sdd $ mount /dev/sdd /mnt $ mkdir -p /mnt/a/b $ mkdir -p /mnt/a/c/d $ mkdir /mnt/a/b/e $ mkdir /mnt/a/c/d/f $ mv /mnt/a/b /mnt/a/c/d/2b $ mkdir /mnt/a/x $ mkdir /mnt/a/y $ btrfs subvolume snapshot -r /mnt /mnt/snap1 $ btrfs send /mnt/snap1 -f /tmp/base.send $ mv /mnt/a/x /mnt/a/y $ mv /mnt/a/c/d/2b/e /mnt/a/c/d/2b/2e $ mv /mnt/a/c/d /mnt/a/h/2d $ mv /mnt/a/c /mnt/a/h/2d/2b/2c $ btrfs subvolume snapshot -r /mnt /mnt/snap2 $ btrfs send -p /mnt/snap1 /mnt/snap2 -f /tmp/incremental.send Simple reproducer for case 2) $ mkfs.btrfs -f /dev/sdd $ mount /dev/sdd /mnt $ mkdir -p /mnt/a/b $ mkdir /mnt/a/c $ mv /mnt/a/b /mnt/a/c/b2 $ mkdir /mnt/a/e $ btrfs subvolume snapshot -r /mnt /mnt/snap1 $ btrfs send /mnt/snap1 -f /tmp/base.send $ mv /mnt/a/c/b2 /mnt/a/e/b3 $ mkdir /mnt/a/e/b3/f $ mkdir /mnt/a/h $ mv /mnt/a/c /mnt/a/e/b3/f/c2 $ mv /mnt/a/e /mnt/a/h/e2 $ btrfs subvolume snapshot -r /mnt /mnt/snap2 $ btrfs send -p /mnt/snap1 /mnt/snap2 -f /tmp/incremental.send Another simple reproducer for case 2) $ mkfs.btrfs -f /dev/sdd $ mount /dev/sdd /mnt $ mkdir -p /mnt/a/b $ mkdir /mnt/a/c $ mkdir /mnt/a/b/d $ mkdir /mnt/a/c/e $ btrfs subvolume snapshot -r /mnt /mnt/snap1 $ btrfs send /mnt/snap1 -f /tmp/base.send $ mkdir /mnt/a/b/d/f $ mkdir /mnt/a/b/g $ mv /mnt/a/c/e /mnt/a/b/g/e2 $ mv /mnt/a/c /mnt/a/b/d/f/c2 $ mv /mnt/a/b/d/f /mnt/a/b/g/e2/f2 $ btrfs subvolume snapshot -r /mnt /mnt/snap2 $ btrfs send -p /mnt/snap1 /mnt/snap2 -f /tmp/incremental.send More complex reproducer for case 2) $ mkfs.btrfs -f /dev/sdd $ mount /dev/sdd /mnt $ mkdir -p /mnt/a/b $ mkdir -p /mnt/a/c/d $ mkdir /mnt/a/b/e $ mkdir /mnt/a/c/d/f $ mv /mnt/a/b /mnt/a/c/d/2b $ mkdir /mnt/a/x $ mkdir /mnt/a/y $ btrfs subvolume snapshot -r /mnt /mnt/snap1 $ btrfs send /mnt/snap1 -f /tmp/base.send $ mv /mnt/a/x /mnt/a/y $ mv /mnt/a/c/d/2b/e /mnt/a/c/d/2b/2e $ mv /mnt/a/c/d /mnt/a/h/2d $ mv /mnt/a/c /mnt/a/h/2d/2b/2c $ btrfs subvolume snapshot -r /mnt /mnt/snap2 $ btrfs send -p /mnt/snap1 /mnt/snap2 -f /tmp/incremental.send For both cases the incremental send would enter an infinite loop when building path strings. While solving these cases, this change also re-implements the code to detect when directory moves/renames should be delayed. Instead of dealing with several specific cases separately, it's now more generic handling all cases with a simple detection algorithm and if when applying a delayed move/rename there's a path loop detected, it further delays the move/rename registering a new ancestor inode as the dependency inode (so our rename happens after that ancestor is renamed). Tests for these cases is being added to xfstests too. Signed-off-by: Filipe David Borba Manana <fdmanana@gmail.com> Signed-off-by: Chris Mason <clm@fb.com>
2014-03-27 20:14:01 +00:00
Btrfs: fix infinite path build loops in incremental send The send operation processes inodes by their ascending number, and assumes that any rename/move operation can be successfully performed (sent to the caller) once all previous inodes (those with a smaller inode number than the one we're currently processing) were processed. This is not true when an incremental send had to process an hierarchical change between 2 snapshots where the parent-children relationship between directory inodes was reversed - that is, parents became children and children became parents. This situation made the path building code go into an infinite loop, which kept allocating more and more memory that eventually lead to a krealloc warning being displayed in dmesg: WARNING: CPU: 1 PID: 5705 at mm/page_alloc.c:2477 __alloc_pages_nodemask+0x365/0xad0() Modules linked in: btrfs raid6_pq xor pci_stub vboxpci(O) vboxnetadp(O) vboxnetflt(O) vboxdrv(O) snd_hda_codec_hdmi snd_hda_codec_realtek joydev radeon snd_hda_intel snd_hda_codec snd_hwdep snd_seq_midi snd_pcm psmouse i915 snd_rawmidi serio_raw snd_seq_midi_event lpc_ich snd_seq snd_timer ttm snd_seq_device rfcomm drm_kms_helper parport_pc bnep bluetooth drm ppdev snd soundcore i2c_algo_bit snd_page_alloc binfmt_misc video lp parport r8169 mii hid_generic usbhid hid CPU: 1 PID: 5705 Comm: btrfs Tainted: G O 3.13.0-rc7-fdm-btrfs-next-18+ #3 Hardware name: To Be Filled By O.E.M. To Be Filled By O.E.M./Z77 Pro4, BIOS P1.50 09/04/2012 [ 5381.660441] 00000000000009ad ffff8806f6f2f4e8 ffffffff81777434 0000000000000007 [ 5381.660447] 0000000000000000 ffff8806f6f2f528 ffffffff8104a9ec ffff8807038f36f0 [ 5381.660452] 0000000000000000 0000000000000206 ffff8807038f2490 ffff8807038f36f0 [ 5381.660457] Call Trace: [ 5381.660464] [<ffffffff81777434>] dump_stack+0x4e/0x68 [ 5381.660471] [<ffffffff8104a9ec>] warn_slowpath_common+0x8c/0xc0 [ 5381.660476] [<ffffffff8104aa3a>] warn_slowpath_null+0x1a/0x20 [ 5381.660480] [<ffffffff81144995>] __alloc_pages_nodemask+0x365/0xad0 [ 5381.660487] [<ffffffff8108313f>] ? local_clock+0x4f/0x60 [ 5381.660491] [<ffffffff811430e8>] ? free_one_page+0x98/0x440 [ 5381.660495] [<ffffffff8108313f>] ? local_clock+0x4f/0x60 [ 5381.660502] [<ffffffff8113fae4>] ? __get_free_pages+0x14/0x50 [ 5381.660508] [<ffffffff81095fb8>] ? trace_hardirqs_off_caller+0x28/0xd0 [ 5381.660515] [<ffffffff81183caf>] alloc_pages_current+0x10f/0x1f0 [ 5381.660520] [<ffffffff8113fae4>] ? __get_free_pages+0x14/0x50 [ 5381.660524] [<ffffffff8113fae4>] __get_free_pages+0x14/0x50 [ 5381.660530] [<ffffffff8115dace>] kmalloc_order_trace+0x3e/0x100 [ 5381.660536] [<ffffffff81191ea0>] __kmalloc_track_caller+0x220/0x230 [ 5381.660560] [<ffffffffa0729fdb>] ? fs_path_ensure_buf.part.12+0x6b/0x200 [btrfs] [ 5381.660564] [<ffffffff8178085c>] ? retint_restore_args+0xe/0xe [ 5381.660569] [<ffffffff811580ef>] krealloc+0x6f/0xb0 [ 5381.660586] [<ffffffffa0729fdb>] fs_path_ensure_buf.part.12+0x6b/0x200 [btrfs] [ 5381.660601] [<ffffffffa072a208>] fs_path_prepare_for_add+0x98/0xb0 [btrfs] [ 5381.660615] [<ffffffffa072a2bc>] fs_path_add_path+0x2c/0x60 [btrfs] [ 5381.660628] [<ffffffffa072c55c>] get_cur_path+0x7c/0x1c0 [btrfs] Even without this loop, the incremental send couldn't succeed, because it would attempt to send a rename/move operation for the lower inode before the highest inode number was renamed/move. This issue is easy to trigger with the following steps: $ mkfs.btrfs -f /dev/sdb3 $ mount /dev/sdb3 /mnt/btrfs $ mkdir -p /mnt/btrfs/a/b/c/d $ mkdir /mnt/btrfs/a/b/c2 $ btrfs subvol snapshot -r /mnt/btrfs /mnt/btrfs/snap1 $ mv /mnt/btrfs/a/b/c/d /mnt/btrfs/a/b/c2/d2 $ mv /mnt/btrfs/a/b/c /mnt/btrfs/a/b/c2/d2/cc $ btrfs subvol snapshot -r /mnt/btrfs /mnt/btrfs/snap2 $ btrfs send -p /mnt/btrfs/snap1 /mnt/btrfs/snap2 > /tmp/incremental.send The structure of the filesystem when the first snapshot is taken is: . (ino 256) |-- a (ino 257) |-- b (ino 258) |-- c (ino 259) | |-- d (ino 260) | |-- c2 (ino 261) And its structure when the second snapshot is taken is: . (ino 256) |-- a (ino 257) |-- b (ino 258) |-- c2 (ino 261) |-- d2 (ino 260) |-- cc (ino 259) Before the move/rename operation is performed for the inode 259, the move/rename for inode 260 must be performed, since 259 is now a child of 260. A test case for xfstests, with a more complex scenario, will follow soon. Signed-off-by: Filipe David Borba Manana <fdmanana@gmail.com> Signed-off-by: Josef Bacik <jbacik@fb.com> Signed-off-by: Chris Mason <clm@fb.com>
2014-01-22 10:00:53 +00:00
Btrfs: part 2, fix incremental send's decision to delay a dir move/rename For an incremental send, fix the process of determining whether the directory inode we're currently processing needs to have its move/rename operation delayed. We were ignoring the fact that if the inode's new immediate ancestor has a higher inode number than ours but wasn't renamed/moved, we might still need to delay our move/rename, because some other ancestor directory higher in the hierarchy might have an inode number higher than ours *and* was renamed/moved too - in this case we have to wait for rename/move of that ancestor to happen before our current directory's rename/move operation. Simple steps to reproduce this issue: $ mkfs.btrfs -f /dev/sdd $ mount /dev/sdd /mnt $ mkdir -p /mnt/a/x1/x2 $ mkdir /mnt/a/Z $ mkdir -p /mnt/a/x1/x2/x3/x4/x5 $ btrfs subvolume snapshot -r /mnt /mnt/snap1 $ btrfs send /mnt/snap1 -f /tmp/base.send $ mv /mnt/a/x1/x2/x3 /mnt/a/Z/X33 $ mv /mnt/a/x1/x2 /mnt/a/Z/X33/x4/x5/X22 $ btrfs subvolume snapshot -r /mnt /mnt/snap2 $ btrfs send -p /mnt/snap1 /mnt/snap2 -f /tmp/incremental.send The incremental send caused the kernel code to enter an infinite loop when building the path string for directory Z after its references are processed. A more complex scenario: $ mkfs.btrfs -f /dev/sdd $ mount /dev/sdd /mnt $ mkdir -p /mnt/a/b/c/d $ mkdir /mnt/a/b/c/d/e $ mkdir /mnt/a/b/c/d/f $ mv /mnt/a/b/c/d/e /mnt/a/b/c/d/f/E2 $ mkdir /mmt/a/b/c/g $ mv /mnt/a/b/c/d /mnt/a/b/D2 $ btrfs subvolume snapshot -r /mnt /mnt/snap1 $ btrfs send /mnt/snap1 -f /tmp/base.send $ mkdir /mnt/a/o $ mv /mnt/a/b/c/g /mnt/a/b/D2/f/G2 $ mv /mnt/a/b/D2 /mnt/a/b/dd $ mv /mnt/a/b/c /mnt/a/C2 $ mv /mnt/a/b/dd/f /mnt/a/o/FF $ mv /mnt/a/b /mnt/a/o/FF/E2/BB $ btrfs subvolume snapshot -r /mnt /mnt/snap2 $ btrfs send -p /mnt/snap1 /mnt/snap2 -f /tmp/incremental.send A test case for xfstests follows. Signed-off-by: Filipe David Borba Manana <fdmanana@gmail.com> Signed-off-by: Chris Mason <clm@fb.com>
2014-03-19 14:20:54 +00:00
Btrfs: send, fix more issues related to directory renames This is a continuation of the previous changes titled: Btrfs: fix incremental send's decision to delay a dir move/rename Btrfs: part 2, fix incremental send's decision to delay a dir move/rename There's a few more cases where a directory rename/move must be delayed which was previously overlooked. If our immediate ancestor has a lower inode number than ours and it doesn't have a delayed rename/move operation associated to it, it doesn't mean there isn't any non-direct ancestor of our current inode that needs to be renamed/moved before our current inode (i.e. with a higher inode number than ours). So we can't stop the search if our immediate ancestor has a lower inode number than ours, we need to navigate the directory hierarchy upwards until we hit the root or: 1) find an ancestor with an higher inode number that was renamed/moved in the send root too (or already has a pending rename/move registered); 2) find an ancestor that is a new directory (higher inode number than ours and exists only in the send root). Reproducer for case 1) $ mkfs.btrfs -f /dev/sdd $ mount /dev/sdd /mnt $ mkdir -p /mnt/a/b $ mkdir -p /mnt/a/c/d $ mkdir /mnt/a/b/e $ mkdir /mnt/a/c/d/f $ mv /mnt/a/b /mnt/a/c/d/2b $ mkdir /mnt/a/x $ mkdir /mnt/a/y $ btrfs subvolume snapshot -r /mnt /mnt/snap1 $ btrfs send /mnt/snap1 -f /tmp/base.send $ mv /mnt/a/x /mnt/a/y $ mv /mnt/a/c/d/2b/e /mnt/a/c/d/2b/2e $ mv /mnt/a/c/d /mnt/a/h/2d $ mv /mnt/a/c /mnt/a/h/2d/2b/2c $ btrfs subvolume snapshot -r /mnt /mnt/snap2 $ btrfs send -p /mnt/snap1 /mnt/snap2 -f /tmp/incremental.send Simple reproducer for case 2) $ mkfs.btrfs -f /dev/sdd $ mount /dev/sdd /mnt $ mkdir -p /mnt/a/b $ mkdir /mnt/a/c $ mv /mnt/a/b /mnt/a/c/b2 $ mkdir /mnt/a/e $ btrfs subvolume snapshot -r /mnt /mnt/snap1 $ btrfs send /mnt/snap1 -f /tmp/base.send $ mv /mnt/a/c/b2 /mnt/a/e/b3 $ mkdir /mnt/a/e/b3/f $ mkdir /mnt/a/h $ mv /mnt/a/c /mnt/a/e/b3/f/c2 $ mv /mnt/a/e /mnt/a/h/e2 $ btrfs subvolume snapshot -r /mnt /mnt/snap2 $ btrfs send -p /mnt/snap1 /mnt/snap2 -f /tmp/incremental.send Another simple reproducer for case 2) $ mkfs.btrfs -f /dev/sdd $ mount /dev/sdd /mnt $ mkdir -p /mnt/a/b $ mkdir /mnt/a/c $ mkdir /mnt/a/b/d $ mkdir /mnt/a/c/e $ btrfs subvolume snapshot -r /mnt /mnt/snap1 $ btrfs send /mnt/snap1 -f /tmp/base.send $ mkdir /mnt/a/b/d/f $ mkdir /mnt/a/b/g $ mv /mnt/a/c/e /mnt/a/b/g/e2 $ mv /mnt/a/c /mnt/a/b/d/f/c2 $ mv /mnt/a/b/d/f /mnt/a/b/g/e2/f2 $ btrfs subvolume snapshot -r /mnt /mnt/snap2 $ btrfs send -p /mnt/snap1 /mnt/snap2 -f /tmp/incremental.send More complex reproducer for case 2) $ mkfs.btrfs -f /dev/sdd $ mount /dev/sdd /mnt $ mkdir -p /mnt/a/b $ mkdir -p /mnt/a/c/d $ mkdir /mnt/a/b/e $ mkdir /mnt/a/c/d/f $ mv /mnt/a/b /mnt/a/c/d/2b $ mkdir /mnt/a/x $ mkdir /mnt/a/y $ btrfs subvolume snapshot -r /mnt /mnt/snap1 $ btrfs send /mnt/snap1 -f /tmp/base.send $ mv /mnt/a/x /mnt/a/y $ mv /mnt/a/c/d/2b/e /mnt/a/c/d/2b/2e $ mv /mnt/a/c/d /mnt/a/h/2d $ mv /mnt/a/c /mnt/a/h/2d/2b/2c $ btrfs subvolume snapshot -r /mnt /mnt/snap2 $ btrfs send -p /mnt/snap1 /mnt/snap2 -f /tmp/incremental.send For both cases the incremental send would enter an infinite loop when building path strings. While solving these cases, this change also re-implements the code to detect when directory moves/renames should be delayed. Instead of dealing with several specific cases separately, it's now more generic handling all cases with a simple detection algorithm and if when applying a delayed move/rename there's a path loop detected, it further delays the move/rename registering a new ancestor inode as the dependency inode (so our rename happens after that ancestor is renamed). Tests for these cases is being added to xfstests too. Signed-off-by: Filipe David Borba Manana <fdmanana@gmail.com> Signed-off-by: Chris Mason <clm@fb.com>
2014-03-27 20:14:01 +00:00
Btrfs: incremental send, don't delay directory renames unnecessarily Even though we delay the rename of directories when they become descendents of other directories that were also renamed in the send root to prevent infinite path build loops, we were doing it in cases where this was not needed and was actually harmful resulting in infinite path build loops as we ended up with a circular dependency of delayed directory renames. Consider the following reproducer: $ mkfs.btrfs -f /dev/sdb $ mount /dev/sdb /mnt $ mkfs.btrfs -f /dev/sdc $ mount /dev/sdc /mnt2 $ mkdir /mnt/data $ mkdir /mnt/data/n1 $ mkdir /mnt/data/n1/n2 $ mkdir /mnt/data/n4 $ mkdir /mnt/data/n1/n2/p1 $ mkdir /mnt/data/n1/n2/p1/p2 $ mkdir /mnt/data/t6 $ mkdir /mnt/data/t7 $ mkdir -p /mnt/data/t5/t7 $ mkdir /mnt/data/t2 $ mkdir /mnt/data/t4 $ mkdir -p /mnt/data/t1/t3 $ mkdir /mnt/data/p1 $ mv /mnt/data/t1 /mnt/data/p1 $ mkdir -p /mnt/data/p1/p2 $ mv /mnt/data/t4 /mnt/data/p1/p2/t1 $ mv /mnt/data/t5 /mnt/data/n4/t5 $ mv /mnt/data/n1/n2/p1/p2 /mnt/data/n4/t5/p2 $ mv /mnt/data/t7 /mnt/data/n4/t5/p2/t7 $ mv /mnt/data/t2 /mnt/data/n4/t1 $ mv /mnt/data/p1 /mnt/data/n4/t5/p2/p1 $ mv /mnt/data/n1/n2 /mnt/data/n4/t5/p2/p1/p2/n2 $ mv /mnt/data/n4/t5/p2/p1/p2/t1 /mnt/data/n4/t5/p2/p1/p2/n2/t1 $ mv /mnt/data/n4/t5/t7 /mnt/data/n4/t5/p2/p1/p2/n2/t1/t7 $ mv /mnt/data/n4/t5/p2/p1/t1/t3 /mnt/data/n4/t5/p2/p1/p2/n2/t1/t3 $ mv /mnt/data/n4/t5/p2/p1/p2/n2/p1 /mnt/data/n4/t5/p2/p1/p2/n2/t1/t7/p1 $ mv /mnt/data/t6 /mnt/data/n4/t5/p2/p1/p2/n2/t1/t3/t5 $ mv /mnt/data/n4/t5/p2/p1/t1 /mnt/data/n4/t5/p2/p1/p2/n2/t1/t3/t1 $ mv /mnt/data/n1 /mnt/data/n4/t5/p2/p1/p2/n2/t1/t7/p1/n1 $ btrfs subvolume snapshot -r /mnt /mnt/snap1 $ mv /mnt/data/n4/t1 /mnt/data/n4/t5/p2/p1/p2/n2/t1/t7/p1/t1 $ mv /mnt/data/n4/t5/p2/p1/p2/n2/t1 /mnt/data/n4/ $ mv /mnt/data/n4/t5/p2/p1/p2/n2 /mnt/data/n4/t1/n2 $ mv /mnt/data/n4/t1/t7/p1 /mnt/data/n4/t1/n2/p1 $ mv /mnt/data/n4/t1/t3/t1 /mnt/data/n4/t1/n2/t1 $ mv /mnt/data/n4/t1/t3 /mnt/data/n4/t1/n2/t1/t3 $ mv /mnt/data/n4/t5/p2/p1/p2 /mnt/data/n4/t1/n2/p1/p2 $ mv /mnt/data/n4/t1/t7 /mnt/data/n4/t1/n2/p1/t7 $ mv /mnt/data/n4/t5/p2/p1 /mnt/data/n4/t1/n2/p1/p2/p1 $ mv /mnt/data/n4/t1/n2/t1/t3/t5 /mnt/data/n4/t1/n2/p1/p2/t5 $ mv /mnt/data/n4/t5 /mnt/data/n4/t1/n2/p1/p2/p1/t5 $ mv /mnt/data/n4/t1/n2/p1/p2/p1/t5/p2 /mnt/data/n4/t1/n2/p1/p2/p1/p2 $ mv /mnt/data/n4/t1/n2/p1/p2/p1/p2/t7 /mnt/data/n4/t1/t7 $ btrfs subvolume snapshot -r /mnt /mnt/snap2 $ btrfs send /mnt/snap1 | btrfs receive /mnt2 $ btrfs send -p /mnt/snap1 /mnt/snap2 | btrfs receive -vv /mnt2 ERROR: send ioctl failed with -12: Cannot allocate memory This reproducer resulted in an infinite path build loop when building the path for inode 266 because the following circular dependency of delayed directory renames was created: ino 272 <- ino 261 <- ino 259 <- ino 268 <- ino 267 <- ino 261 Where the notation "X <- Y" means the rename of inode X is delayed by the rename of inode Y (X will be renamed after Y is renamed). This resulted in an infinite path build loop of inode 266 because that inode has inode 261 as an ancestor in the send root and inode 261 is in the circular dependency of delayed renames listed above. Fix this by not delaying the rename of a directory inode if an ancestor of the inode in the send root, which has a delayed rename operation, is not also a descendent of the inode in the parent root. Thanks to Robbie Ko for sending the reproducer example. A test case for xfstests follows soon. Reported-by: Robbie Ko <robbieko@synology.com> Signed-off-by: Filipe Manana <fdmanana@suse.com>
2015-03-27 17:50:45 +00:00
Btrfs: part 2, fix incremental send's decision to delay a dir move/rename For an incremental send, fix the process of determining whether the directory inode we're currently processing needs to have its move/rename operation delayed. We were ignoring the fact that if the inode's new immediate ancestor has a higher inode number than ours but wasn't renamed/moved, we might still need to delay our move/rename, because some other ancestor directory higher in the hierarchy might have an inode number higher than ours *and* was renamed/moved too - in this case we have to wait for rename/move of that ancestor to happen before our current directory's rename/move operation. Simple steps to reproduce this issue: $ mkfs.btrfs -f /dev/sdd $ mount /dev/sdd /mnt $ mkdir -p /mnt/a/x1/x2 $ mkdir /mnt/a/Z $ mkdir -p /mnt/a/x1/x2/x3/x4/x5 $ btrfs subvolume snapshot -r /mnt /mnt/snap1 $ btrfs send /mnt/snap1 -f /tmp/base.send $ mv /mnt/a/x1/x2/x3 /mnt/a/Z/X33 $ mv /mnt/a/x1/x2 /mnt/a/Z/X33/x4/x5/X22 $ btrfs subvolume snapshot -r /mnt /mnt/snap2 $ btrfs send -p /mnt/snap1 /mnt/snap2 -f /tmp/incremental.send The incremental send caused the kernel code to enter an infinite loop when building the path string for directory Z after its references are processed. A more complex scenario: $ mkfs.btrfs -f /dev/sdd $ mount /dev/sdd /mnt $ mkdir -p /mnt/a/b/c/d $ mkdir /mnt/a/b/c/d/e $ mkdir /mnt/a/b/c/d/f $ mv /mnt/a/b/c/d/e /mnt/a/b/c/d/f/E2 $ mkdir /mmt/a/b/c/g $ mv /mnt/a/b/c/d /mnt/a/b/D2 $ btrfs subvolume snapshot -r /mnt /mnt/snap1 $ btrfs send /mnt/snap1 -f /tmp/base.send $ mkdir /mnt/a/o $ mv /mnt/a/b/c/g /mnt/a/b/D2/f/G2 $ mv /mnt/a/b/D2 /mnt/a/b/dd $ mv /mnt/a/b/c /mnt/a/C2 $ mv /mnt/a/b/dd/f /mnt/a/o/FF $ mv /mnt/a/b /mnt/a/o/FF/E2/BB $ btrfs subvolume snapshot -r /mnt /mnt/snap2 $ btrfs send -p /mnt/snap1 /mnt/snap2 -f /tmp/incremental.send A test case for xfstests follows. Signed-off-by: Filipe David Borba Manana <fdmanana@gmail.com> Signed-off-by: Chris Mason <clm@fb.com>
2014-03-19 14:20:54 +00:00
Btrfs: send, fix more issues related to directory renames This is a continuation of the previous changes titled: Btrfs: fix incremental send's decision to delay a dir move/rename Btrfs: part 2, fix incremental send's decision to delay a dir move/rename There's a few more cases where a directory rename/move must be delayed which was previously overlooked. If our immediate ancestor has a lower inode number than ours and it doesn't have a delayed rename/move operation associated to it, it doesn't mean there isn't any non-direct ancestor of our current inode that needs to be renamed/moved before our current inode (i.e. with a higher inode number than ours). So we can't stop the search if our immediate ancestor has a lower inode number than ours, we need to navigate the directory hierarchy upwards until we hit the root or: 1) find an ancestor with an higher inode number that was renamed/moved in the send root too (or already has a pending rename/move registered); 2) find an ancestor that is a new directory (higher inode number than ours and exists only in the send root). Reproducer for case 1) $ mkfs.btrfs -f /dev/sdd $ mount /dev/sdd /mnt $ mkdir -p /mnt/a/b $ mkdir -p /mnt/a/c/d $ mkdir /mnt/a/b/e $ mkdir /mnt/a/c/d/f $ mv /mnt/a/b /mnt/a/c/d/2b $ mkdir /mnt/a/x $ mkdir /mnt/a/y $ btrfs subvolume snapshot -r /mnt /mnt/snap1 $ btrfs send /mnt/snap1 -f /tmp/base.send $ mv /mnt/a/x /mnt/a/y $ mv /mnt/a/c/d/2b/e /mnt/a/c/d/2b/2e $ mv /mnt/a/c/d /mnt/a/h/2d $ mv /mnt/a/c /mnt/a/h/2d/2b/2c $ btrfs subvolume snapshot -r /mnt /mnt/snap2 $ btrfs send -p /mnt/snap1 /mnt/snap2 -f /tmp/incremental.send Simple reproducer for case 2) $ mkfs.btrfs -f /dev/sdd $ mount /dev/sdd /mnt $ mkdir -p /mnt/a/b $ mkdir /mnt/a/c $ mv /mnt/a/b /mnt/a/c/b2 $ mkdir /mnt/a/e $ btrfs subvolume snapshot -r /mnt /mnt/snap1 $ btrfs send /mnt/snap1 -f /tmp/base.send $ mv /mnt/a/c/b2 /mnt/a/e/b3 $ mkdir /mnt/a/e/b3/f $ mkdir /mnt/a/h $ mv /mnt/a/c /mnt/a/e/b3/f/c2 $ mv /mnt/a/e /mnt/a/h/e2 $ btrfs subvolume snapshot -r /mnt /mnt/snap2 $ btrfs send -p /mnt/snap1 /mnt/snap2 -f /tmp/incremental.send Another simple reproducer for case 2) $ mkfs.btrfs -f /dev/sdd $ mount /dev/sdd /mnt $ mkdir -p /mnt/a/b $ mkdir /mnt/a/c $ mkdir /mnt/a/b/d $ mkdir /mnt/a/c/e $ btrfs subvolume snapshot -r /mnt /mnt/snap1 $ btrfs send /mnt/snap1 -f /tmp/base.send $ mkdir /mnt/a/b/d/f $ mkdir /mnt/a/b/g $ mv /mnt/a/c/e /mnt/a/b/g/e2 $ mv /mnt/a/c /mnt/a/b/d/f/c2 $ mv /mnt/a/b/d/f /mnt/a/b/g/e2/f2 $ btrfs subvolume snapshot -r /mnt /mnt/snap2 $ btrfs send -p /mnt/snap1 /mnt/snap2 -f /tmp/incremental.send More complex reproducer for case 2) $ mkfs.btrfs -f /dev/sdd $ mount /dev/sdd /mnt $ mkdir -p /mnt/a/b $ mkdir -p /mnt/a/c/d $ mkdir /mnt/a/b/e $ mkdir /mnt/a/c/d/f $ mv /mnt/a/b /mnt/a/c/d/2b $ mkdir /mnt/a/x $ mkdir /mnt/a/y $ btrfs subvolume snapshot -r /mnt /mnt/snap1 $ btrfs send /mnt/snap1 -f /tmp/base.send $ mv /mnt/a/x /mnt/a/y $ mv /mnt/a/c/d/2b/e /mnt/a/c/d/2b/2e $ mv /mnt/a/c/d /mnt/a/h/2d $ mv /mnt/a/c /mnt/a/h/2d/2b/2c $ btrfs subvolume snapshot -r /mnt /mnt/snap2 $ btrfs send -p /mnt/snap1 /mnt/snap2 -f /tmp/incremental.send For both cases the incremental send would enter an infinite loop when building path strings. While solving these cases, this change also re-implements the code to detect when directory moves/renames should be delayed. Instead of dealing with several specific cases separately, it's now more generic handling all cases with a simple detection algorithm and if when applying a delayed move/rename there's a path loop detected, it further delays the move/rename registering a new ancestor inode as the dependency inode (so our rename happens after that ancestor is renamed). Tests for these cases is being added to xfstests too. Signed-off-by: Filipe David Borba Manana <fdmanana@gmail.com> Signed-off-by: Chris Mason <clm@fb.com>
2014-03-27 20:14:01 +00:00
Btrfs: incremental send, don't delay directory renames unnecessarily Even though we delay the rename of directories when they become descendents of other directories that were also renamed in the send root to prevent infinite path build loops, we were doing it in cases where this was not needed and was actually harmful resulting in infinite path build loops as we ended up with a circular dependency of delayed directory renames. Consider the following reproducer: $ mkfs.btrfs -f /dev/sdb $ mount /dev/sdb /mnt $ mkfs.btrfs -f /dev/sdc $ mount /dev/sdc /mnt2 $ mkdir /mnt/data $ mkdir /mnt/data/n1 $ mkdir /mnt/data/n1/n2 $ mkdir /mnt/data/n4 $ mkdir /mnt/data/n1/n2/p1 $ mkdir /mnt/data/n1/n2/p1/p2 $ mkdir /mnt/data/t6 $ mkdir /mnt/data/t7 $ mkdir -p /mnt/data/t5/t7 $ mkdir /mnt/data/t2 $ mkdir /mnt/data/t4 $ mkdir -p /mnt/data/t1/t3 $ mkdir /mnt/data/p1 $ mv /mnt/data/t1 /mnt/data/p1 $ mkdir -p /mnt/data/p1/p2 $ mv /mnt/data/t4 /mnt/data/p1/p2/t1 $ mv /mnt/data/t5 /mnt/data/n4/t5 $ mv /mnt/data/n1/n2/p1/p2 /mnt/data/n4/t5/p2 $ mv /mnt/data/t7 /mnt/data/n4/t5/p2/t7 $ mv /mnt/data/t2 /mnt/data/n4/t1 $ mv /mnt/data/p1 /mnt/data/n4/t5/p2/p1 $ mv /mnt/data/n1/n2 /mnt/data/n4/t5/p2/p1/p2/n2 $ mv /mnt/data/n4/t5/p2/p1/p2/t1 /mnt/data/n4/t5/p2/p1/p2/n2/t1 $ mv /mnt/data/n4/t5/t7 /mnt/data/n4/t5/p2/p1/p2/n2/t1/t7 $ mv /mnt/data/n4/t5/p2/p1/t1/t3 /mnt/data/n4/t5/p2/p1/p2/n2/t1/t3 $ mv /mnt/data/n4/t5/p2/p1/p2/n2/p1 /mnt/data/n4/t5/p2/p1/p2/n2/t1/t7/p1 $ mv /mnt/data/t6 /mnt/data/n4/t5/p2/p1/p2/n2/t1/t3/t5 $ mv /mnt/data/n4/t5/p2/p1/t1 /mnt/data/n4/t5/p2/p1/p2/n2/t1/t3/t1 $ mv /mnt/data/n1 /mnt/data/n4/t5/p2/p1/p2/n2/t1/t7/p1/n1 $ btrfs subvolume snapshot -r /mnt /mnt/snap1 $ mv /mnt/data/n4/t1 /mnt/data/n4/t5/p2/p1/p2/n2/t1/t7/p1/t1 $ mv /mnt/data/n4/t5/p2/p1/p2/n2/t1 /mnt/data/n4/ $ mv /mnt/data/n4/t5/p2/p1/p2/n2 /mnt/data/n4/t1/n2 $ mv /mnt/data/n4/t1/t7/p1 /mnt/data/n4/t1/n2/p1 $ mv /mnt/data/n4/t1/t3/t1 /mnt/data/n4/t1/n2/t1 $ mv /mnt/data/n4/t1/t3 /mnt/data/n4/t1/n2/t1/t3 $ mv /mnt/data/n4/t5/p2/p1/p2 /mnt/data/n4/t1/n2/p1/p2 $ mv /mnt/data/n4/t1/t7 /mnt/data/n4/t1/n2/p1/t7 $ mv /mnt/data/n4/t5/p2/p1 /mnt/data/n4/t1/n2/p1/p2/p1 $ mv /mnt/data/n4/t1/n2/t1/t3/t5 /mnt/data/n4/t1/n2/p1/p2/t5 $ mv /mnt/data/n4/t5 /mnt/data/n4/t1/n2/p1/p2/p1/t5 $ mv /mnt/data/n4/t1/n2/p1/p2/p1/t5/p2 /mnt/data/n4/t1/n2/p1/p2/p1/p2 $ mv /mnt/data/n4/t1/n2/p1/p2/p1/p2/t7 /mnt/data/n4/t1/t7 $ btrfs subvolume snapshot -r /mnt /mnt/snap2 $ btrfs send /mnt/snap1 | btrfs receive /mnt2 $ btrfs send -p /mnt/snap1 /mnt/snap2 | btrfs receive -vv /mnt2 ERROR: send ioctl failed with -12: Cannot allocate memory This reproducer resulted in an infinite path build loop when building the path for inode 266 because the following circular dependency of delayed directory renames was created: ino 272 <- ino 261 <- ino 259 <- ino 268 <- ino 267 <- ino 261 Where the notation "X <- Y" means the rename of inode X is delayed by the rename of inode Y (X will be renamed after Y is renamed). This resulted in an infinite path build loop of inode 266 because that inode has inode 261 as an ancestor in the send root and inode 261 is in the circular dependency of delayed renames listed above. Fix this by not delaying the rename of a directory inode if an ancestor of the inode in the send root, which has a delayed rename operation, is not also a descendent of the inode in the parent root. Thanks to Robbie Ko for sending the reproducer example. A test case for xfstests follows soon. Reported-by: Robbie Ko <robbieko@synology.com> Signed-off-by: Filipe Manana <fdmanana@suse.com>
2015-03-27 17:50:45 +00:00
Btrfs: send, fix more issues related to directory renames This is a continuation of the previous changes titled: Btrfs: fix incremental send's decision to delay a dir move/rename Btrfs: part 2, fix incremental send's decision to delay a dir move/rename There's a few more cases where a directory rename/move must be delayed which was previously overlooked. If our immediate ancestor has a lower inode number than ours and it doesn't have a delayed rename/move operation associated to it, it doesn't mean there isn't any non-direct ancestor of our current inode that needs to be renamed/moved before our current inode (i.e. with a higher inode number than ours). So we can't stop the search if our immediate ancestor has a lower inode number than ours, we need to navigate the directory hierarchy upwards until we hit the root or: 1) find an ancestor with an higher inode number that was renamed/moved in the send root too (or already has a pending rename/move registered); 2) find an ancestor that is a new directory (higher inode number than ours and exists only in the send root). Reproducer for case 1) $ mkfs.btrfs -f /dev/sdd $ mount /dev/sdd /mnt $ mkdir -p /mnt/a/b $ mkdir -p /mnt/a/c/d $ mkdir /mnt/a/b/e $ mkdir /mnt/a/c/d/f $ mv /mnt/a/b /mnt/a/c/d/2b $ mkdir /mnt/a/x $ mkdir /mnt/a/y $ btrfs subvolume snapshot -r /mnt /mnt/snap1 $ btrfs send /mnt/snap1 -f /tmp/base.send $ mv /mnt/a/x /mnt/a/y $ mv /mnt/a/c/d/2b/e /mnt/a/c/d/2b/2e $ mv /mnt/a/c/d /mnt/a/h/2d $ mv /mnt/a/c /mnt/a/h/2d/2b/2c $ btrfs subvolume snapshot -r /mnt /mnt/snap2 $ btrfs send -p /mnt/snap1 /mnt/snap2 -f /tmp/incremental.send Simple reproducer for case 2) $ mkfs.btrfs -f /dev/sdd $ mount /dev/sdd /mnt $ mkdir -p /mnt/a/b $ mkdir /mnt/a/c $ mv /mnt/a/b /mnt/a/c/b2 $ mkdir /mnt/a/e $ btrfs subvolume snapshot -r /mnt /mnt/snap1 $ btrfs send /mnt/snap1 -f /tmp/base.send $ mv /mnt/a/c/b2 /mnt/a/e/b3 $ mkdir /mnt/a/e/b3/f $ mkdir /mnt/a/h $ mv /mnt/a/c /mnt/a/e/b3/f/c2 $ mv /mnt/a/e /mnt/a/h/e2 $ btrfs subvolume snapshot -r /mnt /mnt/snap2 $ btrfs send -p /mnt/snap1 /mnt/snap2 -f /tmp/incremental.send Another simple reproducer for case 2) $ mkfs.btrfs -f /dev/sdd $ mount /dev/sdd /mnt $ mkdir -p /mnt/a/b $ mkdir /mnt/a/c $ mkdir /mnt/a/b/d $ mkdir /mnt/a/c/e $ btrfs subvolume snapshot -r /mnt /mnt/snap1 $ btrfs send /mnt/snap1 -f /tmp/base.send $ mkdir /mnt/a/b/d/f $ mkdir /mnt/a/b/g $ mv /mnt/a/c/e /mnt/a/b/g/e2 $ mv /mnt/a/c /mnt/a/b/d/f/c2 $ mv /mnt/a/b/d/f /mnt/a/b/g/e2/f2 $ btrfs subvolume snapshot -r /mnt /mnt/snap2 $ btrfs send -p /mnt/snap1 /mnt/snap2 -f /tmp/incremental.send More complex reproducer for case 2) $ mkfs.btrfs -f /dev/sdd $ mount /dev/sdd /mnt $ mkdir -p /mnt/a/b $ mkdir -p /mnt/a/c/d $ mkdir /mnt/a/b/e $ mkdir /mnt/a/c/d/f $ mv /mnt/a/b /mnt/a/c/d/2b $ mkdir /mnt/a/x $ mkdir /mnt/a/y $ btrfs subvolume snapshot -r /mnt /mnt/snap1 $ btrfs send /mnt/snap1 -f /tmp/base.send $ mv /mnt/a/x /mnt/a/y $ mv /mnt/a/c/d/2b/e /mnt/a/c/d/2b/2e $ mv /mnt/a/c/d /mnt/a/h/2d $ mv /mnt/a/c /mnt/a/h/2d/2b/2c $ btrfs subvolume snapshot -r /mnt /mnt/snap2 $ btrfs send -p /mnt/snap1 /mnt/snap2 -f /tmp/incremental.send For both cases the incremental send would enter an infinite loop when building path strings. While solving these cases, this change also re-implements the code to detect when directory moves/renames should be delayed. Instead of dealing with several specific cases separately, it's now more generic handling all cases with a simple detection algorithm and if when applying a delayed move/rename there's a path loop detected, it further delays the move/rename registering a new ancestor inode as the dependency inode (so our rename happens after that ancestor is renamed). Tests for these cases is being added to xfstests too. Signed-off-by: Filipe David Borba Manana <fdmanana@gmail.com> Signed-off-by: Chris Mason <clm@fb.com>
2014-03-27 20:14:01 +00:00
Btrfs: part 2, fix incremental send's decision to delay a dir move/rename For an incremental send, fix the process of determining whether the directory inode we're currently processing needs to have its move/rename operation delayed. We were ignoring the fact that if the inode's new immediate ancestor has a higher inode number than ours but wasn't renamed/moved, we might still need to delay our move/rename, because some other ancestor directory higher in the hierarchy might have an inode number higher than ours *and* was renamed/moved too - in this case we have to wait for rename/move of that ancestor to happen before our current directory's rename/move operation. Simple steps to reproduce this issue: $ mkfs.btrfs -f /dev/sdd $ mount /dev/sdd /mnt $ mkdir -p /mnt/a/x1/x2 $ mkdir /mnt/a/Z $ mkdir -p /mnt/a/x1/x2/x3/x4/x5 $ btrfs subvolume snapshot -r /mnt /mnt/snap1 $ btrfs send /mnt/snap1 -f /tmp/base.send $ mv /mnt/a/x1/x2/x3 /mnt/a/Z/X33 $ mv /mnt/a/x1/x2 /mnt/a/Z/X33/x4/x5/X22 $ btrfs subvolume snapshot -r /mnt /mnt/snap2 $ btrfs send -p /mnt/snap1 /mnt/snap2 -f /tmp/incremental.send The incremental send caused the kernel code to enter an infinite loop when building the path string for directory Z after its references are processed. A more complex scenario: $ mkfs.btrfs -f /dev/sdd $ mount /dev/sdd /mnt $ mkdir -p /mnt/a/b/c/d $ mkdir /mnt/a/b/c/d/e $ mkdir /mnt/a/b/c/d/f $ mv /mnt/a/b/c/d/e /mnt/a/b/c/d/f/E2 $ mkdir /mmt/a/b/c/g $ mv /mnt/a/b/c/d /mnt/a/b/D2 $ btrfs subvolume snapshot -r /mnt /mnt/snap1 $ btrfs send /mnt/snap1 -f /tmp/base.send $ mkdir /mnt/a/o $ mv /mnt/a/b/c/g /mnt/a/b/D2/f/G2 $ mv /mnt/a/b/D2 /mnt/a/b/dd $ mv /mnt/a/b/c /mnt/a/C2 $ mv /mnt/a/b/dd/f /mnt/a/o/FF $ mv /mnt/a/b /mnt/a/o/FF/E2/BB $ btrfs subvolume snapshot -r /mnt /mnt/snap2 $ btrfs send -p /mnt/snap1 /mnt/snap2 -f /tmp/incremental.send A test case for xfstests follows. Signed-off-by: Filipe David Borba Manana <fdmanana@gmail.com> Signed-off-by: Chris Mason <clm@fb.com>
2014-03-19 14:20:54 +00:00
Btrfs: send, fix more issues related to directory renames This is a continuation of the previous changes titled: Btrfs: fix incremental send's decision to delay a dir move/rename Btrfs: part 2, fix incremental send's decision to delay a dir move/rename There's a few more cases where a directory rename/move must be delayed which was previously overlooked. If our immediate ancestor has a lower inode number than ours and it doesn't have a delayed rename/move operation associated to it, it doesn't mean there isn't any non-direct ancestor of our current inode that needs to be renamed/moved before our current inode (i.e. with a higher inode number than ours). So we can't stop the search if our immediate ancestor has a lower inode number than ours, we need to navigate the directory hierarchy upwards until we hit the root or: 1) find an ancestor with an higher inode number that was renamed/moved in the send root too (or already has a pending rename/move registered); 2) find an ancestor that is a new directory (higher inode number than ours and exists only in the send root). Reproducer for case 1) $ mkfs.btrfs -f /dev/sdd $ mount /dev/sdd /mnt $ mkdir -p /mnt/a/b $ mkdir -p /mnt/a/c/d $ mkdir /mnt/a/b/e $ mkdir /mnt/a/c/d/f $ mv /mnt/a/b /mnt/a/c/d/2b $ mkdir /mnt/a/x $ mkdir /mnt/a/y $ btrfs subvolume snapshot -r /mnt /mnt/snap1 $ btrfs send /mnt/snap1 -f /tmp/base.send $ mv /mnt/a/x /mnt/a/y $ mv /mnt/a/c/d/2b/e /mnt/a/c/d/2b/2e $ mv /mnt/a/c/d /mnt/a/h/2d $ mv /mnt/a/c /mnt/a/h/2d/2b/2c $ btrfs subvolume snapshot -r /mnt /mnt/snap2 $ btrfs send -p /mnt/snap1 /mnt/snap2 -f /tmp/incremental.send Simple reproducer for case 2) $ mkfs.btrfs -f /dev/sdd $ mount /dev/sdd /mnt $ mkdir -p /mnt/a/b $ mkdir /mnt/a/c $ mv /mnt/a/b /mnt/a/c/b2 $ mkdir /mnt/a/e $ btrfs subvolume snapshot -r /mnt /mnt/snap1 $ btrfs send /mnt/snap1 -f /tmp/base.send $ mv /mnt/a/c/b2 /mnt/a/e/b3 $ mkdir /mnt/a/e/b3/f $ mkdir /mnt/a/h $ mv /mnt/a/c /mnt/a/e/b3/f/c2 $ mv /mnt/a/e /mnt/a/h/e2 $ btrfs subvolume snapshot -r /mnt /mnt/snap2 $ btrfs send -p /mnt/snap1 /mnt/snap2 -f /tmp/incremental.send Another simple reproducer for case 2) $ mkfs.btrfs -f /dev/sdd $ mount /dev/sdd /mnt $ mkdir -p /mnt/a/b $ mkdir /mnt/a/c $ mkdir /mnt/a/b/d $ mkdir /mnt/a/c/e $ btrfs subvolume snapshot -r /mnt /mnt/snap1 $ btrfs send /mnt/snap1 -f /tmp/base.send $ mkdir /mnt/a/b/d/f $ mkdir /mnt/a/b/g $ mv /mnt/a/c/e /mnt/a/b/g/e2 $ mv /mnt/a/c /mnt/a/b/d/f/c2 $ mv /mnt/a/b/d/f /mnt/a/b/g/e2/f2 $ btrfs subvolume snapshot -r /mnt /mnt/snap2 $ btrfs send -p /mnt/snap1 /mnt/snap2 -f /tmp/incremental.send More complex reproducer for case 2) $ mkfs.btrfs -f /dev/sdd $ mount /dev/sdd /mnt $ mkdir -p /mnt/a/b $ mkdir -p /mnt/a/c/d $ mkdir /mnt/a/b/e $ mkdir /mnt/a/c/d/f $ mv /mnt/a/b /mnt/a/c/d/2b $ mkdir /mnt/a/x $ mkdir /mnt/a/y $ btrfs subvolume snapshot -r /mnt /mnt/snap1 $ btrfs send /mnt/snap1 -f /tmp/base.send $ mv /mnt/a/x /mnt/a/y $ mv /mnt/a/c/d/2b/e /mnt/a/c/d/2b/2e $ mv /mnt/a/c/d /mnt/a/h/2d $ mv /mnt/a/c /mnt/a/h/2d/2b/2c $ btrfs subvolume snapshot -r /mnt /mnt/snap2 $ btrfs send -p /mnt/snap1 /mnt/snap2 -f /tmp/incremental.send For both cases the incremental send would enter an infinite loop when building path strings. While solving these cases, this change also re-implements the code to detect when directory moves/renames should be delayed. Instead of dealing with several specific cases separately, it's now more generic handling all cases with a simple detection algorithm and if when applying a delayed move/rename there's a path loop detected, it further delays the move/rename registering a new ancestor inode as the dependency inode (so our rename happens after that ancestor is renamed). Tests for these cases is being added to xfstests too. Signed-off-by: Filipe David Borba Manana <fdmanana@gmail.com> Signed-off-by: Chris Mason <clm@fb.com>
2014-03-27 20:14:01 +00:00
Btrfs: part 2, fix incremental send's decision to delay a dir move/rename For an incremental send, fix the process of determining whether the directory inode we're currently processing needs to have its move/rename operation delayed. We were ignoring the fact that if the inode's new immediate ancestor has a higher inode number than ours but wasn't renamed/moved, we might still need to delay our move/rename, because some other ancestor directory higher in the hierarchy might have an inode number higher than ours *and* was renamed/moved too - in this case we have to wait for rename/move of that ancestor to happen before our current directory's rename/move operation. Simple steps to reproduce this issue: $ mkfs.btrfs -f /dev/sdd $ mount /dev/sdd /mnt $ mkdir -p /mnt/a/x1/x2 $ mkdir /mnt/a/Z $ mkdir -p /mnt/a/x1/x2/x3/x4/x5 $ btrfs subvolume snapshot -r /mnt /mnt/snap1 $ btrfs send /mnt/snap1 -f /tmp/base.send $ mv /mnt/a/x1/x2/x3 /mnt/a/Z/X33 $ mv /mnt/a/x1/x2 /mnt/a/Z/X33/x4/x5/X22 $ btrfs subvolume snapshot -r /mnt /mnt/snap2 $ btrfs send -p /mnt/snap1 /mnt/snap2 -f /tmp/incremental.send The incremental send caused the kernel code to enter an infinite loop when building the path string for directory Z after its references are processed. A more complex scenario: $ mkfs.btrfs -f /dev/sdd $ mount /dev/sdd /mnt $ mkdir -p /mnt/a/b/c/d $ mkdir /mnt/a/b/c/d/e $ mkdir /mnt/a/b/c/d/f $ mv /mnt/a/b/c/d/e /mnt/a/b/c/d/f/E2 $ mkdir /mmt/a/b/c/g $ mv /mnt/a/b/c/d /mnt/a/b/D2 $ btrfs subvolume snapshot -r /mnt /mnt/snap1 $ btrfs send /mnt/snap1 -f /tmp/base.send $ mkdir /mnt/a/o $ mv /mnt/a/b/c/g /mnt/a/b/D2/f/G2 $ mv /mnt/a/b/D2 /mnt/a/b/dd $ mv /mnt/a/b/c /mnt/a/C2 $ mv /mnt/a/b/dd/f /mnt/a/o/FF $ mv /mnt/a/b /mnt/a/o/FF/E2/BB $ btrfs subvolume snapshot -r /mnt /mnt/snap2 $ btrfs send -p /mnt/snap1 /mnt/snap2 -f /tmp/incremental.send A test case for xfstests follows. Signed-off-by: Filipe David Borba Manana <fdmanana@gmail.com> Signed-off-by: Chris Mason <clm@fb.com>
2014-03-19 14:20:54 +00:00
Btrfs: send, fix more issues related to directory renames This is a continuation of the previous changes titled: Btrfs: fix incremental send's decision to delay a dir move/rename Btrfs: part 2, fix incremental send's decision to delay a dir move/rename There's a few more cases where a directory rename/move must be delayed which was previously overlooked. If our immediate ancestor has a lower inode number than ours and it doesn't have a delayed rename/move operation associated to it, it doesn't mean there isn't any non-direct ancestor of our current inode that needs to be renamed/moved before our current inode (i.e. with a higher inode number than ours). So we can't stop the search if our immediate ancestor has a lower inode number than ours, we need to navigate the directory hierarchy upwards until we hit the root or: 1) find an ancestor with an higher inode number that was renamed/moved in the send root too (or already has a pending rename/move registered); 2) find an ancestor that is a new directory (higher inode number than ours and exists only in the send root). Reproducer for case 1) $ mkfs.btrfs -f /dev/sdd $ mount /dev/sdd /mnt $ mkdir -p /mnt/a/b $ mkdir -p /mnt/a/c/d $ mkdir /mnt/a/b/e $ mkdir /mnt/a/c/d/f $ mv /mnt/a/b /mnt/a/c/d/2b $ mkdir /mnt/a/x $ mkdir /mnt/a/y $ btrfs subvolume snapshot -r /mnt /mnt/snap1 $ btrfs send /mnt/snap1 -f /tmp/base.send $ mv /mnt/a/x /mnt/a/y $ mv /mnt/a/c/d/2b/e /mnt/a/c/d/2b/2e $ mv /mnt/a/c/d /mnt/a/h/2d $ mv /mnt/a/c /mnt/a/h/2d/2b/2c $ btrfs subvolume snapshot -r /mnt /mnt/snap2 $ btrfs send -p /mnt/snap1 /mnt/snap2 -f /tmp/incremental.send Simple reproducer for case 2) $ mkfs.btrfs -f /dev/sdd $ mount /dev/sdd /mnt $ mkdir -p /mnt/a/b $ mkdir /mnt/a/c $ mv /mnt/a/b /mnt/a/c/b2 $ mkdir /mnt/a/e $ btrfs subvolume snapshot -r /mnt /mnt/snap1 $ btrfs send /mnt/snap1 -f /tmp/base.send $ mv /mnt/a/c/b2 /mnt/a/e/b3 $ mkdir /mnt/a/e/b3/f $ mkdir /mnt/a/h $ mv /mnt/a/c /mnt/a/e/b3/f/c2 $ mv /mnt/a/e /mnt/a/h/e2 $ btrfs subvolume snapshot -r /mnt /mnt/snap2 $ btrfs send -p /mnt/snap1 /mnt/snap2 -f /tmp/incremental.send Another simple reproducer for case 2) $ mkfs.btrfs -f /dev/sdd $ mount /dev/sdd /mnt $ mkdir -p /mnt/a/b $ mkdir /mnt/a/c $ mkdir /mnt/a/b/d $ mkdir /mnt/a/c/e $ btrfs subvolume snapshot -r /mnt /mnt/snap1 $ btrfs send /mnt/snap1 -f /tmp/base.send $ mkdir /mnt/a/b/d/f $ mkdir /mnt/a/b/g $ mv /mnt/a/c/e /mnt/a/b/g/e2 $ mv /mnt/a/c /mnt/a/b/d/f/c2 $ mv /mnt/a/b/d/f /mnt/a/b/g/e2/f2 $ btrfs subvolume snapshot -r /mnt /mnt/snap2 $ btrfs send -p /mnt/snap1 /mnt/snap2 -f /tmp/incremental.send More complex reproducer for case 2) $ mkfs.btrfs -f /dev/sdd $ mount /dev/sdd /mnt $ mkdir -p /mnt/a/b $ mkdir -p /mnt/a/c/d $ mkdir /mnt/a/b/e $ mkdir /mnt/a/c/d/f $ mv /mnt/a/b /mnt/a/c/d/2b $ mkdir /mnt/a/x $ mkdir /mnt/a/y $ btrfs subvolume snapshot -r /mnt /mnt/snap1 $ btrfs send /mnt/snap1 -f /tmp/base.send $ mv /mnt/a/x /mnt/a/y $ mv /mnt/a/c/d/2b/e /mnt/a/c/d/2b/2e $ mv /mnt/a/c/d /mnt/a/h/2d $ mv /mnt/a/c /mnt/a/h/2d/2b/2c $ btrfs subvolume snapshot -r /mnt /mnt/snap2 $ btrfs send -p /mnt/snap1 /mnt/snap2 -f /tmp/incremental.send For both cases the incremental send would enter an infinite loop when building path strings. While solving these cases, this change also re-implements the code to detect when directory moves/renames should be delayed. Instead of dealing with several specific cases separately, it's now more generic handling all cases with a simple detection algorithm and if when applying a delayed move/rename there's a path loop detected, it further delays the move/rename registering a new ancestor inode as the dependency inode (so our rename happens after that ancestor is renamed). Tests for these cases is being added to xfstests too. Signed-off-by: Filipe David Borba Manana <fdmanana@gmail.com> Signed-off-by: Chris Mason <clm@fb.com>
2014-03-27 20:14:01 +00:00
Btrfs: part 2, fix incremental send's decision to delay a dir move/rename For an incremental send, fix the process of determining whether the directory inode we're currently processing needs to have its move/rename operation delayed. We were ignoring the fact that if the inode's new immediate ancestor has a higher inode number than ours but wasn't renamed/moved, we might still need to delay our move/rename, because some other ancestor directory higher in the hierarchy might have an inode number higher than ours *and* was renamed/moved too - in this case we have to wait for rename/move of that ancestor to happen before our current directory's rename/move operation. Simple steps to reproduce this issue: $ mkfs.btrfs -f /dev/sdd $ mount /dev/sdd /mnt $ mkdir -p /mnt/a/x1/x2 $ mkdir /mnt/a/Z $ mkdir -p /mnt/a/x1/x2/x3/x4/x5 $ btrfs subvolume snapshot -r /mnt /mnt/snap1 $ btrfs send /mnt/snap1 -f /tmp/base.send $ mv /mnt/a/x1/x2/x3 /mnt/a/Z/X33 $ mv /mnt/a/x1/x2 /mnt/a/Z/X33/x4/x5/X22 $ btrfs subvolume snapshot -r /mnt /mnt/snap2 $ btrfs send -p /mnt/snap1 /mnt/snap2 -f /tmp/incremental.send The incremental send caused the kernel code to enter an infinite loop when building the path string for directory Z after its references are processed. A more complex scenario: $ mkfs.btrfs -f /dev/sdd $ mount /dev/sdd /mnt $ mkdir -p /mnt/a/b/c/d $ mkdir /mnt/a/b/c/d/e $ mkdir /mnt/a/b/c/d/f $ mv /mnt/a/b/c/d/e /mnt/a/b/c/d/f/E2 $ mkdir /mmt/a/b/c/g $ mv /mnt/a/b/c/d /mnt/a/b/D2 $ btrfs subvolume snapshot -r /mnt /mnt/snap1 $ btrfs send /mnt/snap1 -f /tmp/base.send $ mkdir /mnt/a/o $ mv /mnt/a/b/c/g /mnt/a/b/D2/f/G2 $ mv /mnt/a/b/D2 /mnt/a/b/dd $ mv /mnt/a/b/c /mnt/a/C2 $ mv /mnt/a/b/dd/f /mnt/a/o/FF $ mv /mnt/a/b /mnt/a/o/FF/E2/BB $ btrfs subvolume snapshot -r /mnt /mnt/snap2 $ btrfs send -p /mnt/snap1 /mnt/snap2 -f /tmp/incremental.send A test case for xfstests follows. Signed-off-by: Filipe David Borba Manana <fdmanana@gmail.com> Signed-off-by: Chris Mason <clm@fb.com>
2014-03-19 14:20:54 +00:00
Btrfs: send, fix more issues related to directory renames This is a continuation of the previous changes titled: Btrfs: fix incremental send's decision to delay a dir move/rename Btrfs: part 2, fix incremental send's decision to delay a dir move/rename There's a few more cases where a directory rename/move must be delayed which was previously overlooked. If our immediate ancestor has a lower inode number than ours and it doesn't have a delayed rename/move operation associated to it, it doesn't mean there isn't any non-direct ancestor of our current inode that needs to be renamed/moved before our current inode (i.e. with a higher inode number than ours). So we can't stop the search if our immediate ancestor has a lower inode number than ours, we need to navigate the directory hierarchy upwards until we hit the root or: 1) find an ancestor with an higher inode number that was renamed/moved in the send root too (or already has a pending rename/move registered); 2) find an ancestor that is a new directory (higher inode number than ours and exists only in the send root). Reproducer for case 1) $ mkfs.btrfs -f /dev/sdd $ mount /dev/sdd /mnt $ mkdir -p /mnt/a/b $ mkdir -p /mnt/a/c/d $ mkdir /mnt/a/b/e $ mkdir /mnt/a/c/d/f $ mv /mnt/a/b /mnt/a/c/d/2b $ mkdir /mnt/a/x $ mkdir /mnt/a/y $ btrfs subvolume snapshot -r /mnt /mnt/snap1 $ btrfs send /mnt/snap1 -f /tmp/base.send $ mv /mnt/a/x /mnt/a/y $ mv /mnt/a/c/d/2b/e /mnt/a/c/d/2b/2e $ mv /mnt/a/c/d /mnt/a/h/2d $ mv /mnt/a/c /mnt/a/h/2d/2b/2c $ btrfs subvolume snapshot -r /mnt /mnt/snap2 $ btrfs send -p /mnt/snap1 /mnt/snap2 -f /tmp/incremental.send Simple reproducer for case 2) $ mkfs.btrfs -f /dev/sdd $ mount /dev/sdd /mnt $ mkdir -p /mnt/a/b $ mkdir /mnt/a/c $ mv /mnt/a/b /mnt/a/c/b2 $ mkdir /mnt/a/e $ btrfs subvolume snapshot -r /mnt /mnt/snap1 $ btrfs send /mnt/snap1 -f /tmp/base.send $ mv /mnt/a/c/b2 /mnt/a/e/b3 $ mkdir /mnt/a/e/b3/f $ mkdir /mnt/a/h $ mv /mnt/a/c /mnt/a/e/b3/f/c2 $ mv /mnt/a/e /mnt/a/h/e2 $ btrfs subvolume snapshot -r /mnt /mnt/snap2 $ btrfs send -p /mnt/snap1 /mnt/snap2 -f /tmp/incremental.send Another simple reproducer for case 2) $ mkfs.btrfs -f /dev/sdd $ mount /dev/sdd /mnt $ mkdir -p /mnt/a/b $ mkdir /mnt/a/c $ mkdir /mnt/a/b/d $ mkdir /mnt/a/c/e $ btrfs subvolume snapshot -r /mnt /mnt/snap1 $ btrfs send /mnt/snap1 -f /tmp/base.send $ mkdir /mnt/a/b/d/f $ mkdir /mnt/a/b/g $ mv /mnt/a/c/e /mnt/a/b/g/e2 $ mv /mnt/a/c /mnt/a/b/d/f/c2 $ mv /mnt/a/b/d/f /mnt/a/b/g/e2/f2 $ btrfs subvolume snapshot -r /mnt /mnt/snap2 $ btrfs send -p /mnt/snap1 /mnt/snap2 -f /tmp/incremental.send More complex reproducer for case 2) $ mkfs.btrfs -f /dev/sdd $ mount /dev/sdd /mnt $ mkdir -p /mnt/a/b $ mkdir -p /mnt/a/c/d $ mkdir /mnt/a/b/e $ mkdir /mnt/a/c/d/f $ mv /mnt/a/b /mnt/a/c/d/2b $ mkdir /mnt/a/x $ mkdir /mnt/a/y $ btrfs subvolume snapshot -r /mnt /mnt/snap1 $ btrfs send /mnt/snap1 -f /tmp/base.send $ mv /mnt/a/x /mnt/a/y $ mv /mnt/a/c/d/2b/e /mnt/a/c/d/2b/2e $ mv /mnt/a/c/d /mnt/a/h/2d $ mv /mnt/a/c /mnt/a/h/2d/2b/2c $ btrfs subvolume snapshot -r /mnt /mnt/snap2 $ btrfs send -p /mnt/snap1 /mnt/snap2 -f /tmp/incremental.send For both cases the incremental send would enter an infinite loop when building path strings. While solving these cases, this change also re-implements the code to detect when directory moves/renames should be delayed. Instead of dealing with several specific cases separately, it's now more generic handling all cases with a simple detection algorithm and if when applying a delayed move/rename there's a path loop detected, it further delays the move/rename registering a new ancestor inode as the dependency inode (so our rename happens after that ancestor is renamed). Tests for these cases is being added to xfstests too. Signed-off-by: Filipe David Borba Manana <fdmanana@gmail.com> Signed-off-by: Chris Mason <clm@fb.com>
2014-03-27 20:14:01 +00:00
Btrfs: send, don't delay dir move if there's a new parent inode If between two snapshots we rename an existing directory named X to Y and make it a child (direct or not) of a new inode named X, we were delaying the move/rename of the former directory unnecessarily, which would result in attempting to rename the new directory from its orphan name to name X prematurely. Minimal reproducer: $ mkfs.btrfs -f /dev/vdd $ mount /dev/vdd /mnt $ mkdir -p /mnt/merlin/RC/OSD/Source $ btrfs subvolume snapshot -r /mnt /mnt/mysnap1 $ mkdir /mnt/OSD $ mv /mnt/merlin/RC/OSD /mnt/OSD/OSD-Plane_788 $ mv /mnt/OSD /mnt/merlin/RC $ btrfs subvolume snapshot -r /mnt /mnt/mysnap2 $ btrfs send /mnt/mysnap1 -f /tmp/1.snap $ btrfs send -p /mnt/mysnap1 /mnt/mysnap2 -f /tmp/2.snap $ mkfs.btrfs -f /dev/vdc $ mount /dev/vdc /mnt2 $ btrfs receive /mnt2 -f /tmp/1.snap $ btrfs receive /mnt2 -f /tmp/2.snap The second receive (from an incremental send) failed with the following error message: "rename o261-7-0 -> merlin/RC/OSD failed". This is a regression introduced in the 3.16 kernel. A test case for xfstests follows. Reported-by: Marc Merlin <marc@merlins.org> Signed-off-by: Filipe Manana <fdmanana@suse.com> Signed-off-by: Chris Mason <clm@fb.com>
2014-10-02 19:17:32 +01:00
Btrfs: send, fix more issues related to directory renames This is a continuation of the previous changes titled: Btrfs: fix incremental send's decision to delay a dir move/rename Btrfs: part 2, fix incremental send's decision to delay a dir move/rename There's a few more cases where a directory rename/move must be delayed which was previously overlooked. If our immediate ancestor has a lower inode number than ours and it doesn't have a delayed rename/move operation associated to it, it doesn't mean there isn't any non-direct ancestor of our current inode that needs to be renamed/moved before our current inode (i.e. with a higher inode number than ours). So we can't stop the search if our immediate ancestor has a lower inode number than ours, we need to navigate the directory hierarchy upwards until we hit the root or: 1) find an ancestor with an higher inode number that was renamed/moved in the send root too (or already has a pending rename/move registered); 2) find an ancestor that is a new directory (higher inode number than ours and exists only in the send root). Reproducer for case 1) $ mkfs.btrfs -f /dev/sdd $ mount /dev/sdd /mnt $ mkdir -p /mnt/a/b $ mkdir -p /mnt/a/c/d $ mkdir /mnt/a/b/e $ mkdir /mnt/a/c/d/f $ mv /mnt/a/b /mnt/a/c/d/2b $ mkdir /mnt/a/x $ mkdir /mnt/a/y $ btrfs subvolume snapshot -r /mnt /mnt/snap1 $ btrfs send /mnt/snap1 -f /tmp/base.send $ mv /mnt/a/x /mnt/a/y $ mv /mnt/a/c/d/2b/e /mnt/a/c/d/2b/2e $ mv /mnt/a/c/d /mnt/a/h/2d $ mv /mnt/a/c /mnt/a/h/2d/2b/2c $ btrfs subvolume snapshot -r /mnt /mnt/snap2 $ btrfs send -p /mnt/snap1 /mnt/snap2 -f /tmp/incremental.send Simple reproducer for case 2) $ mkfs.btrfs -f /dev/sdd $ mount /dev/sdd /mnt $ mkdir -p /mnt/a/b $ mkdir /mnt/a/c $ mv /mnt/a/b /mnt/a/c/b2 $ mkdir /mnt/a/e $ btrfs subvolume snapshot -r /mnt /mnt/snap1 $ btrfs send /mnt/snap1 -f /tmp/base.send $ mv /mnt/a/c/b2 /mnt/a/e/b3 $ mkdir /mnt/a/e/b3/f $ mkdir /mnt/a/h $ mv /mnt/a/c /mnt/a/e/b3/f/c2 $ mv /mnt/a/e /mnt/a/h/e2 $ btrfs subvolume snapshot -r /mnt /mnt/snap2 $ btrfs send -p /mnt/snap1 /mnt/snap2 -f /tmp/incremental.send Another simple reproducer for case 2) $ mkfs.btrfs -f /dev/sdd $ mount /dev/sdd /mnt $ mkdir -p /mnt/a/b $ mkdir /mnt/a/c $ mkdir /mnt/a/b/d $ mkdir /mnt/a/c/e $ btrfs subvolume snapshot -r /mnt /mnt/snap1 $ btrfs send /mnt/snap1 -f /tmp/base.send $ mkdir /mnt/a/b/d/f $ mkdir /mnt/a/b/g $ mv /mnt/a/c/e /mnt/a/b/g/e2 $ mv /mnt/a/c /mnt/a/b/d/f/c2 $ mv /mnt/a/b/d/f /mnt/a/b/g/e2/f2 $ btrfs subvolume snapshot -r /mnt /mnt/snap2 $ btrfs send -p /mnt/snap1 /mnt/snap2 -f /tmp/incremental.send More complex reproducer for case 2) $ mkfs.btrfs -f /dev/sdd $ mount /dev/sdd /mnt $ mkdir -p /mnt/a/b $ mkdir -p /mnt/a/c/d $ mkdir /mnt/a/b/e $ mkdir /mnt/a/c/d/f $ mv /mnt/a/b /mnt/a/c/d/2b $ mkdir /mnt/a/x $ mkdir /mnt/a/y $ btrfs subvolume snapshot -r /mnt /mnt/snap1 $ btrfs send /mnt/snap1 -f /tmp/base.send $ mv /mnt/a/x /mnt/a/y $ mv /mnt/a/c/d/2b/e /mnt/a/c/d/2b/2e $ mv /mnt/a/c/d /mnt/a/h/2d $ mv /mnt/a/c /mnt/a/h/2d/2b/2c $ btrfs subvolume snapshot -r /mnt /mnt/snap2 $ btrfs send -p /mnt/snap1 /mnt/snap2 -f /tmp/incremental.send For both cases the incremental send would enter an infinite loop when building path strings. While solving these cases, this change also re-implements the code to detect when directory moves/renames should be delayed. Instead of dealing with several specific cases separately, it's now more generic handling all cases with a simple detection algorithm and if when applying a delayed move/rename there's a path loop detected, it further delays the move/rename registering a new ancestor inode as the dependency inode (so our rename happens after that ancestor is renamed). Tests for these cases is being added to xfstests too. Signed-off-by: Filipe David Borba Manana <fdmanana@gmail.com> Signed-off-by: Chris Mason <clm@fb.com>
2014-03-27 20:14:01 +00:00
Btrfs: part 2, fix incremental send's decision to delay a dir move/rename For an incremental send, fix the process of determining whether the directory inode we're currently processing needs to have its move/rename operation delayed. We were ignoring the fact that if the inode's new immediate ancestor has a higher inode number than ours but wasn't renamed/moved, we might still need to delay our move/rename, because some other ancestor directory higher in the hierarchy might have an inode number higher than ours *and* was renamed/moved too - in this case we have to wait for rename/move of that ancestor to happen before our current directory's rename/move operation. Simple steps to reproduce this issue: $ mkfs.btrfs -f /dev/sdd $ mount /dev/sdd /mnt $ mkdir -p /mnt/a/x1/x2 $ mkdir /mnt/a/Z $ mkdir -p /mnt/a/x1/x2/x3/x4/x5 $ btrfs subvolume snapshot -r /mnt /mnt/snap1 $ btrfs send /mnt/snap1 -f /tmp/base.send $ mv /mnt/a/x1/x2/x3 /mnt/a/Z/X33 $ mv /mnt/a/x1/x2 /mnt/a/Z/X33/x4/x5/X22 $ btrfs subvolume snapshot -r /mnt /mnt/snap2 $ btrfs send -p /mnt/snap1 /mnt/snap2 -f /tmp/incremental.send The incremental send caused the kernel code to enter an infinite loop when building the path string for directory Z after its references are processed. A more complex scenario: $ mkfs.btrfs -f /dev/sdd $ mount /dev/sdd /mnt $ mkdir -p /mnt/a/b/c/d $ mkdir /mnt/a/b/c/d/e $ mkdir /mnt/a/b/c/d/f $ mv /mnt/a/b/c/d/e /mnt/a/b/c/d/f/E2 $ mkdir /mmt/a/b/c/g $ mv /mnt/a/b/c/d /mnt/a/b/D2 $ btrfs subvolume snapshot -r /mnt /mnt/snap1 $ btrfs send /mnt/snap1 -f /tmp/base.send $ mkdir /mnt/a/o $ mv /mnt/a/b/c/g /mnt/a/b/D2/f/G2 $ mv /mnt/a/b/D2 /mnt/a/b/dd $ mv /mnt/a/b/c /mnt/a/C2 $ mv /mnt/a/b/dd/f /mnt/a/o/FF $ mv /mnt/a/b /mnt/a/o/FF/E2/BB $ btrfs subvolume snapshot -r /mnt /mnt/snap2 $ btrfs send -p /mnt/snap1 /mnt/snap2 -f /tmp/incremental.send A test case for xfstests follows. Signed-off-by: Filipe David Borba Manana <fdmanana@gmail.com> Signed-off-by: Chris Mason <clm@fb.com>
2014-03-19 14:20:54 +00:00
Btrfs: send, fix more issues related to directory renames This is a continuation of the previous changes titled: Btrfs: fix incremental send's decision to delay a dir move/rename Btrfs: part 2, fix incremental send's decision to delay a dir move/rename There's a few more cases where a directory rename/move must be delayed which was previously overlooked. If our immediate ancestor has a lower inode number than ours and it doesn't have a delayed rename/move operation associated to it, it doesn't mean there isn't any non-direct ancestor of our current inode that needs to be renamed/moved before our current inode (i.e. with a higher inode number than ours). So we can't stop the search if our immediate ancestor has a lower inode number than ours, we need to navigate the directory hierarchy upwards until we hit the root or: 1) find an ancestor with an higher inode number that was renamed/moved in the send root too (or already has a pending rename/move registered); 2) find an ancestor that is a new directory (higher inode number than ours and exists only in the send root). Reproducer for case 1) $ mkfs.btrfs -f /dev/sdd $ mount /dev/sdd /mnt $ mkdir -p /mnt/a/b $ mkdir -p /mnt/a/c/d $ mkdir /mnt/a/b/e $ mkdir /mnt/a/c/d/f $ mv /mnt/a/b /mnt/a/c/d/2b $ mkdir /mnt/a/x $ mkdir /mnt/a/y $ btrfs subvolume snapshot -r /mnt /mnt/snap1 $ btrfs send /mnt/snap1 -f /tmp/base.send $ mv /mnt/a/x /mnt/a/y $ mv /mnt/a/c/d/2b/e /mnt/a/c/d/2b/2e $ mv /mnt/a/c/d /mnt/a/h/2d $ mv /mnt/a/c /mnt/a/h/2d/2b/2c $ btrfs subvolume snapshot -r /mnt /mnt/snap2 $ btrfs send -p /mnt/snap1 /mnt/snap2 -f /tmp/incremental.send Simple reproducer for case 2) $ mkfs.btrfs -f /dev/sdd $ mount /dev/sdd /mnt $ mkdir -p /mnt/a/b $ mkdir /mnt/a/c $ mv /mnt/a/b /mnt/a/c/b2 $ mkdir /mnt/a/e $ btrfs subvolume snapshot -r /mnt /mnt/snap1 $ btrfs send /mnt/snap1 -f /tmp/base.send $ mv /mnt/a/c/b2 /mnt/a/e/b3 $ mkdir /mnt/a/e/b3/f $ mkdir /mnt/a/h $ mv /mnt/a/c /mnt/a/e/b3/f/c2 $ mv /mnt/a/e /mnt/a/h/e2 $ btrfs subvolume snapshot -r /mnt /mnt/snap2 $ btrfs send -p /mnt/snap1 /mnt/snap2 -f /tmp/incremental.send Another simple reproducer for case 2) $ mkfs.btrfs -f /dev/sdd $ mount /dev/sdd /mnt $ mkdir -p /mnt/a/b $ mkdir /mnt/a/c $ mkdir /mnt/a/b/d $ mkdir /mnt/a/c/e $ btrfs subvolume snapshot -r /mnt /mnt/snap1 $ btrfs send /mnt/snap1 -f /tmp/base.send $ mkdir /mnt/a/b/d/f $ mkdir /mnt/a/b/g $ mv /mnt/a/c/e /mnt/a/b/g/e2 $ mv /mnt/a/c /mnt/a/b/d/f/c2 $ mv /mnt/a/b/d/f /mnt/a/b/g/e2/f2 $ btrfs subvolume snapshot -r /mnt /mnt/snap2 $ btrfs send -p /mnt/snap1 /mnt/snap2 -f /tmp/incremental.send More complex reproducer for case 2) $ mkfs.btrfs -f /dev/sdd $ mount /dev/sdd /mnt $ mkdir -p /mnt/a/b $ mkdir -p /mnt/a/c/d $ mkdir /mnt/a/b/e $ mkdir /mnt/a/c/d/f $ mv /mnt/a/b /mnt/a/c/d/2b $ mkdir /mnt/a/x $ mkdir /mnt/a/y $ btrfs subvolume snapshot -r /mnt /mnt/snap1 $ btrfs send /mnt/snap1 -f /tmp/base.send $ mv /mnt/a/x /mnt/a/y $ mv /mnt/a/c/d/2b/e /mnt/a/c/d/2b/2e $ mv /mnt/a/c/d /mnt/a/h/2d $ mv /mnt/a/c /mnt/a/h/2d/2b/2c $ btrfs subvolume snapshot -r /mnt /mnt/snap2 $ btrfs send -p /mnt/snap1 /mnt/snap2 -f /tmp/incremental.send For both cases the incremental send would enter an infinite loop when building path strings. While solving these cases, this change also re-implements the code to detect when directory moves/renames should be delayed. Instead of dealing with several specific cases separately, it's now more generic handling all cases with a simple detection algorithm and if when applying a delayed move/rename there's a path loop detected, it further delays the move/rename registering a new ancestor inode as the dependency inode (so our rename happens after that ancestor is renamed). Tests for these cases is being added to xfstests too. Signed-off-by: Filipe David Borba Manana <fdmanana@gmail.com> Signed-off-by: Chris Mason <clm@fb.com>
2014-03-27 20:14:01 +00:00
Btrfs: part 2, fix incremental send's decision to delay a dir move/rename For an incremental send, fix the process of determining whether the directory inode we're currently processing needs to have its move/rename operation delayed. We were ignoring the fact that if the inode's new immediate ancestor has a higher inode number than ours but wasn't renamed/moved, we might still need to delay our move/rename, because some other ancestor directory higher in the hierarchy might have an inode number higher than ours *and* was renamed/moved too - in this case we have to wait for rename/move of that ancestor to happen before our current directory's rename/move operation. Simple steps to reproduce this issue: $ mkfs.btrfs -f /dev/sdd $ mount /dev/sdd /mnt $ mkdir -p /mnt/a/x1/x2 $ mkdir /mnt/a/Z $ mkdir -p /mnt/a/x1/x2/x3/x4/x5 $ btrfs subvolume snapshot -r /mnt /mnt/snap1 $ btrfs send /mnt/snap1 -f /tmp/base.send $ mv /mnt/a/x1/x2/x3 /mnt/a/Z/X33 $ mv /mnt/a/x1/x2 /mnt/a/Z/X33/x4/x5/X22 $ btrfs subvolume snapshot -r /mnt /mnt/snap2 $ btrfs send -p /mnt/snap1 /mnt/snap2 -f /tmp/incremental.send The incremental send caused the kernel code to enter an infinite loop when building the path string for directory Z after its references are processed. A more complex scenario: $ mkfs.btrfs -f /dev/sdd $ mount /dev/sdd /mnt $ mkdir -p /mnt/a/b/c/d $ mkdir /mnt/a/b/c/d/e $ mkdir /mnt/a/b/c/d/f $ mv /mnt/a/b/c/d/e /mnt/a/b/c/d/f/E2 $ mkdir /mmt/a/b/c/g $ mv /mnt/a/b/c/d /mnt/a/b/D2 $ btrfs subvolume snapshot -r /mnt /mnt/snap1 $ btrfs send /mnt/snap1 -f /tmp/base.send $ mkdir /mnt/a/o $ mv /mnt/a/b/c/g /mnt/a/b/D2/f/G2 $ mv /mnt/a/b/D2 /mnt/a/b/dd $ mv /mnt/a/b/c /mnt/a/C2 $ mv /mnt/a/b/dd/f /mnt/a/o/FF $ mv /mnt/a/b /mnt/a/o/FF/E2/BB $ btrfs subvolume snapshot -r /mnt /mnt/snap2 $ btrfs send -p /mnt/snap1 /mnt/snap2 -f /tmp/incremental.send A test case for xfstests follows. Signed-off-by: Filipe David Borba Manana <fdmanana@gmail.com> Signed-off-by: Chris Mason <clm@fb.com>
2014-03-19 14:20:54 +00:00
Btrfs: send, fix more issues related to directory renames This is a continuation of the previous changes titled: Btrfs: fix incremental send's decision to delay a dir move/rename Btrfs: part 2, fix incremental send's decision to delay a dir move/rename There's a few more cases where a directory rename/move must be delayed which was previously overlooked. If our immediate ancestor has a lower inode number than ours and it doesn't have a delayed rename/move operation associated to it, it doesn't mean there isn't any non-direct ancestor of our current inode that needs to be renamed/moved before our current inode (i.e. with a higher inode number than ours). So we can't stop the search if our immediate ancestor has a lower inode number than ours, we need to navigate the directory hierarchy upwards until we hit the root or: 1) find an ancestor with an higher inode number that was renamed/moved in the send root too (or already has a pending rename/move registered); 2) find an ancestor that is a new directory (higher inode number than ours and exists only in the send root). Reproducer for case 1) $ mkfs.btrfs -f /dev/sdd $ mount /dev/sdd /mnt $ mkdir -p /mnt/a/b $ mkdir -p /mnt/a/c/d $ mkdir /mnt/a/b/e $ mkdir /mnt/a/c/d/f $ mv /mnt/a/b /mnt/a/c/d/2b $ mkdir /mnt/a/x $ mkdir /mnt/a/y $ btrfs subvolume snapshot -r /mnt /mnt/snap1 $ btrfs send /mnt/snap1 -f /tmp/base.send $ mv /mnt/a/x /mnt/a/y $ mv /mnt/a/c/d/2b/e /mnt/a/c/d/2b/2e $ mv /mnt/a/c/d /mnt/a/h/2d $ mv /mnt/a/c /mnt/a/h/2d/2b/2c $ btrfs subvolume snapshot -r /mnt /mnt/snap2 $ btrfs send -p /mnt/snap1 /mnt/snap2 -f /tmp/incremental.send Simple reproducer for case 2) $ mkfs.btrfs -f /dev/sdd $ mount /dev/sdd /mnt $ mkdir -p /mnt/a/b $ mkdir /mnt/a/c $ mv /mnt/a/b /mnt/a/c/b2 $ mkdir /mnt/a/e $ btrfs subvolume snapshot -r /mnt /mnt/snap1 $ btrfs send /mnt/snap1 -f /tmp/base.send $ mv /mnt/a/c/b2 /mnt/a/e/b3 $ mkdir /mnt/a/e/b3/f $ mkdir /mnt/a/h $ mv /mnt/a/c /mnt/a/e/b3/f/c2 $ mv /mnt/a/e /mnt/a/h/e2 $ btrfs subvolume snapshot -r /mnt /mnt/snap2 $ btrfs send -p /mnt/snap1 /mnt/snap2 -f /tmp/incremental.send Another simple reproducer for case 2) $ mkfs.btrfs -f /dev/sdd $ mount /dev/sdd /mnt $ mkdir -p /mnt/a/b $ mkdir /mnt/a/c $ mkdir /mnt/a/b/d $ mkdir /mnt/a/c/e $ btrfs subvolume snapshot -r /mnt /mnt/snap1 $ btrfs send /mnt/snap1 -f /tmp/base.send $ mkdir /mnt/a/b/d/f $ mkdir /mnt/a/b/g $ mv /mnt/a/c/e /mnt/a/b/g/e2 $ mv /mnt/a/c /mnt/a/b/d/f/c2 $ mv /mnt/a/b/d/f /mnt/a/b/g/e2/f2 $ btrfs subvolume snapshot -r /mnt /mnt/snap2 $ btrfs send -p /mnt/snap1 /mnt/snap2 -f /tmp/incremental.send More complex reproducer for case 2) $ mkfs.btrfs -f /dev/sdd $ mount /dev/sdd /mnt $ mkdir -p /mnt/a/b $ mkdir -p /mnt/a/c/d $ mkdir /mnt/a/b/e $ mkdir /mnt/a/c/d/f $ mv /mnt/a/b /mnt/a/c/d/2b $ mkdir /mnt/a/x $ mkdir /mnt/a/y $ btrfs subvolume snapshot -r /mnt /mnt/snap1 $ btrfs send /mnt/snap1 -f /tmp/base.send $ mv /mnt/a/x /mnt/a/y $ mv /mnt/a/c/d/2b/e /mnt/a/c/d/2b/2e $ mv /mnt/a/c/d /mnt/a/h/2d $ mv /mnt/a/c /mnt/a/h/2d/2b/2c $ btrfs subvolume snapshot -r /mnt /mnt/snap2 $ btrfs send -p /mnt/snap1 /mnt/snap2 -f /tmp/incremental.send For both cases the incremental send would enter an infinite loop when building path strings. While solving these cases, this change also re-implements the code to detect when directory moves/renames should be delayed. Instead of dealing with several specific cases separately, it's now more generic handling all cases with a simple detection algorithm and if when applying a delayed move/rename there's a path loop detected, it further delays the move/rename registering a new ancestor inode as the dependency inode (so our rename happens after that ancestor is renamed). Tests for these cases is being added to xfstests too. Signed-off-by: Filipe David Borba Manana <fdmanana@gmail.com> Signed-off-by: Chris Mason <clm@fb.com>
2014-03-27 20:14:01 +00:00
Btrfs: part 2, fix incremental send's decision to delay a dir move/rename For an incremental send, fix the process of determining whether the directory inode we're currently processing needs to have its move/rename operation delayed. We were ignoring the fact that if the inode's new immediate ancestor has a higher inode number than ours but wasn't renamed/moved, we might still need to delay our move/rename, because some other ancestor directory higher in the hierarchy might have an inode number higher than ours *and* was renamed/moved too - in this case we have to wait for rename/move of that ancestor to happen before our current directory's rename/move operation. Simple steps to reproduce this issue: $ mkfs.btrfs -f /dev/sdd $ mount /dev/sdd /mnt $ mkdir -p /mnt/a/x1/x2 $ mkdir /mnt/a/Z $ mkdir -p /mnt/a/x1/x2/x3/x4/x5 $ btrfs subvolume snapshot -r /mnt /mnt/snap1 $ btrfs send /mnt/snap1 -f /tmp/base.send $ mv /mnt/a/x1/x2/x3 /mnt/a/Z/X33 $ mv /mnt/a/x1/x2 /mnt/a/Z/X33/x4/x5/X22 $ btrfs subvolume snapshot -r /mnt /mnt/snap2 $ btrfs send -p /mnt/snap1 /mnt/snap2 -f /tmp/incremental.send The incremental send caused the kernel code to enter an infinite loop when building the path string for directory Z after its references are processed. A more complex scenario: $ mkfs.btrfs -f /dev/sdd $ mount /dev/sdd /mnt $ mkdir -p /mnt/a/b/c/d $ mkdir /mnt/a/b/c/d/e $ mkdir /mnt/a/b/c/d/f $ mv /mnt/a/b/c/d/e /mnt/a/b/c/d/f/E2 $ mkdir /mmt/a/b/c/g $ mv /mnt/a/b/c/d /mnt/a/b/D2 $ btrfs subvolume snapshot -r /mnt /mnt/snap1 $ btrfs send /mnt/snap1 -f /tmp/base.send $ mkdir /mnt/a/o $ mv /mnt/a/b/c/g /mnt/a/b/D2/f/G2 $ mv /mnt/a/b/D2 /mnt/a/b/dd $ mv /mnt/a/b/c /mnt/a/C2 $ mv /mnt/a/b/dd/f /mnt/a/o/FF $ mv /mnt/a/b /mnt/a/o/FF/E2/BB $ btrfs subvolume snapshot -r /mnt /mnt/snap2 $ btrfs send -p /mnt/snap1 /mnt/snap2 -f /tmp/incremental.send A test case for xfstests follows. Signed-off-by: Filipe David Borba Manana <fdmanana@gmail.com> Signed-off-by: Chris Mason <clm@fb.com>
2014-03-19 14:20:54 +00:00
Btrfs: fix infinite path build loops in incremental send The send operation processes inodes by their ascending number, and assumes that any rename/move operation can be successfully performed (sent to the caller) once all previous inodes (those with a smaller inode number than the one we're currently processing) were processed. This is not true when an incremental send had to process an hierarchical change between 2 snapshots where the parent-children relationship between directory inodes was reversed - that is, parents became children and children became parents. This situation made the path building code go into an infinite loop, which kept allocating more and more memory that eventually lead to a krealloc warning being displayed in dmesg: WARNING: CPU: 1 PID: 5705 at mm/page_alloc.c:2477 __alloc_pages_nodemask+0x365/0xad0() Modules linked in: btrfs raid6_pq xor pci_stub vboxpci(O) vboxnetadp(O) vboxnetflt(O) vboxdrv(O) snd_hda_codec_hdmi snd_hda_codec_realtek joydev radeon snd_hda_intel snd_hda_codec snd_hwdep snd_seq_midi snd_pcm psmouse i915 snd_rawmidi serio_raw snd_seq_midi_event lpc_ich snd_seq snd_timer ttm snd_seq_device rfcomm drm_kms_helper parport_pc bnep bluetooth drm ppdev snd soundcore i2c_algo_bit snd_page_alloc binfmt_misc video lp parport r8169 mii hid_generic usbhid hid CPU: 1 PID: 5705 Comm: btrfs Tainted: G O 3.13.0-rc7-fdm-btrfs-next-18+ #3 Hardware name: To Be Filled By O.E.M. To Be Filled By O.E.M./Z77 Pro4, BIOS P1.50 09/04/2012 [ 5381.660441] 00000000000009ad ffff8806f6f2f4e8 ffffffff81777434 0000000000000007 [ 5381.660447] 0000000000000000 ffff8806f6f2f528 ffffffff8104a9ec ffff8807038f36f0 [ 5381.660452] 0000000000000000 0000000000000206 ffff8807038f2490 ffff8807038f36f0 [ 5381.660457] Call Trace: [ 5381.660464] [<ffffffff81777434>] dump_stack+0x4e/0x68 [ 5381.660471] [<ffffffff8104a9ec>] warn_slowpath_common+0x8c/0xc0 [ 5381.660476] [<ffffffff8104aa3a>] warn_slowpath_null+0x1a/0x20 [ 5381.660480] [<ffffffff81144995>] __alloc_pages_nodemask+0x365/0xad0 [ 5381.660487] [<ffffffff8108313f>] ? local_clock+0x4f/0x60 [ 5381.660491] [<ffffffff811430e8>] ? free_one_page+0x98/0x440 [ 5381.660495] [<ffffffff8108313f>] ? local_clock+0x4f/0x60 [ 5381.660502] [<ffffffff8113fae4>] ? __get_free_pages+0x14/0x50 [ 5381.660508] [<ffffffff81095fb8>] ? trace_hardirqs_off_caller+0x28/0xd0 [ 5381.660515] [<ffffffff81183caf>] alloc_pages_current+0x10f/0x1f0 [ 5381.660520] [<ffffffff8113fae4>] ? __get_free_pages+0x14/0x50 [ 5381.660524] [<ffffffff8113fae4>] __get_free_pages+0x14/0x50 [ 5381.660530] [<ffffffff8115dace>] kmalloc_order_trace+0x3e/0x100 [ 5381.660536] [<ffffffff81191ea0>] __kmalloc_track_caller+0x220/0x230 [ 5381.660560] [<ffffffffa0729fdb>] ? fs_path_ensure_buf.part.12+0x6b/0x200 [btrfs] [ 5381.660564] [<ffffffff8178085c>] ? retint_restore_args+0xe/0xe [ 5381.660569] [<ffffffff811580ef>] krealloc+0x6f/0xb0 [ 5381.660586] [<ffffffffa0729fdb>] fs_path_ensure_buf.part.12+0x6b/0x200 [btrfs] [ 5381.660601] [<ffffffffa072a208>] fs_path_prepare_for_add+0x98/0xb0 [btrfs] [ 5381.660615] [<ffffffffa072a2bc>] fs_path_add_path+0x2c/0x60 [btrfs] [ 5381.660628] [<ffffffffa072c55c>] get_cur_path+0x7c/0x1c0 [btrfs] Even without this loop, the incremental send couldn't succeed, because it would attempt to send a rename/move operation for the lower inode before the highest inode number was renamed/move. This issue is easy to trigger with the following steps: $ mkfs.btrfs -f /dev/sdb3 $ mount /dev/sdb3 /mnt/btrfs $ mkdir -p /mnt/btrfs/a/b/c/d $ mkdir /mnt/btrfs/a/b/c2 $ btrfs subvol snapshot -r /mnt/btrfs /mnt/btrfs/snap1 $ mv /mnt/btrfs/a/b/c/d /mnt/btrfs/a/b/c2/d2 $ mv /mnt/btrfs/a/b/c /mnt/btrfs/a/b/c2/d2/cc $ btrfs subvol snapshot -r /mnt/btrfs /mnt/btrfs/snap2 $ btrfs send -p /mnt/btrfs/snap1 /mnt/btrfs/snap2 > /tmp/incremental.send The structure of the filesystem when the first snapshot is taken is: . (ino 256) |-- a (ino 257) |-- b (ino 258) |-- c (ino 259) | |-- d (ino 260) | |-- c2 (ino 261) And its structure when the second snapshot is taken is: . (ino 256) |-- a (ino 257) |-- b (ino 258) |-- c2 (ino 261) |-- d2 (ino 260) |-- cc (ino 259) Before the move/rename operation is performed for the inode 259, the move/rename for inode 260 must be performed, since 259 is now a child of 260. A test case for xfstests, with a more complex scenario, will follow soon. Signed-off-by: Filipe David Borba Manana <fdmanana@gmail.com> Signed-off-by: Josef Bacik <jbacik@fb.com> Signed-off-by: Chris Mason <clm@fb.com>
2014-01-22 10:00:53 +00:00
Btrfs: send, fix more issues related to directory renames This is a continuation of the previous changes titled: Btrfs: fix incremental send's decision to delay a dir move/rename Btrfs: part 2, fix incremental send's decision to delay a dir move/rename There's a few more cases where a directory rename/move must be delayed which was previously overlooked. If our immediate ancestor has a lower inode number than ours and it doesn't have a delayed rename/move operation associated to it, it doesn't mean there isn't any non-direct ancestor of our current inode that needs to be renamed/moved before our current inode (i.e. with a higher inode number than ours). So we can't stop the search if our immediate ancestor has a lower inode number than ours, we need to navigate the directory hierarchy upwards until we hit the root or: 1) find an ancestor with an higher inode number that was renamed/moved in the send root too (or already has a pending rename/move registered); 2) find an ancestor that is a new directory (higher inode number than ours and exists only in the send root). Reproducer for case 1) $ mkfs.btrfs -f /dev/sdd $ mount /dev/sdd /mnt $ mkdir -p /mnt/a/b $ mkdir -p /mnt/a/c/d $ mkdir /mnt/a/b/e $ mkdir /mnt/a/c/d/f $ mv /mnt/a/b /mnt/a/c/d/2b $ mkdir /mnt/a/x $ mkdir /mnt/a/y $ btrfs subvolume snapshot -r /mnt /mnt/snap1 $ btrfs send /mnt/snap1 -f /tmp/base.send $ mv /mnt/a/x /mnt/a/y $ mv /mnt/a/c/d/2b/e /mnt/a/c/d/2b/2e $ mv /mnt/a/c/d /mnt/a/h/2d $ mv /mnt/a/c /mnt/a/h/2d/2b/2c $ btrfs subvolume snapshot -r /mnt /mnt/snap2 $ btrfs send -p /mnt/snap1 /mnt/snap2 -f /tmp/incremental.send Simple reproducer for case 2) $ mkfs.btrfs -f /dev/sdd $ mount /dev/sdd /mnt $ mkdir -p /mnt/a/b $ mkdir /mnt/a/c $ mv /mnt/a/b /mnt/a/c/b2 $ mkdir /mnt/a/e $ btrfs subvolume snapshot -r /mnt /mnt/snap1 $ btrfs send /mnt/snap1 -f /tmp/base.send $ mv /mnt/a/c/b2 /mnt/a/e/b3 $ mkdir /mnt/a/e/b3/f $ mkdir /mnt/a/h $ mv /mnt/a/c /mnt/a/e/b3/f/c2 $ mv /mnt/a/e /mnt/a/h/e2 $ btrfs subvolume snapshot -r /mnt /mnt/snap2 $ btrfs send -p /mnt/snap1 /mnt/snap2 -f /tmp/incremental.send Another simple reproducer for case 2) $ mkfs.btrfs -f /dev/sdd $ mount /dev/sdd /mnt $ mkdir -p /mnt/a/b $ mkdir /mnt/a/c $ mkdir /mnt/a/b/d $ mkdir /mnt/a/c/e $ btrfs subvolume snapshot -r /mnt /mnt/snap1 $ btrfs send /mnt/snap1 -f /tmp/base.send $ mkdir /mnt/a/b/d/f $ mkdir /mnt/a/b/g $ mv /mnt/a/c/e /mnt/a/b/g/e2 $ mv /mnt/a/c /mnt/a/b/d/f/c2 $ mv /mnt/a/b/d/f /mnt/a/b/g/e2/f2 $ btrfs subvolume snapshot -r /mnt /mnt/snap2 $ btrfs send -p /mnt/snap1 /mnt/snap2 -f /tmp/incremental.send More complex reproducer for case 2) $ mkfs.btrfs -f /dev/sdd $ mount /dev/sdd /mnt $ mkdir -p /mnt/a/b $ mkdir -p /mnt/a/c/d $ mkdir /mnt/a/b/e $ mkdir /mnt/a/c/d/f $ mv /mnt/a/b /mnt/a/c/d/2b $ mkdir /mnt/a/x $ mkdir /mnt/a/y $ btrfs subvolume snapshot -r /mnt /mnt/snap1 $ btrfs send /mnt/snap1 -f /tmp/base.send $ mv /mnt/a/x /mnt/a/y $ mv /mnt/a/c/d/2b/e /mnt/a/c/d/2b/2e $ mv /mnt/a/c/d /mnt/a/h/2d $ mv /mnt/a/c /mnt/a/h/2d/2b/2c $ btrfs subvolume snapshot -r /mnt /mnt/snap2 $ btrfs send -p /mnt/snap1 /mnt/snap2 -f /tmp/incremental.send For both cases the incremental send would enter an infinite loop when building path strings. While solving these cases, this change also re-implements the code to detect when directory moves/renames should be delayed. Instead of dealing with several specific cases separately, it's now more generic handling all cases with a simple detection algorithm and if when applying a delayed move/rename there's a path loop detected, it further delays the move/rename registering a new ancestor inode as the dependency inode (so our rename happens after that ancestor is renamed). Tests for these cases is being added to xfstests too. Signed-off-by: Filipe David Borba Manana <fdmanana@gmail.com> Signed-off-by: Chris Mason <clm@fb.com>
2014-03-27 20:14:01 +00:00
Btrfs: incremental send, don't rename a directory too soon There's one more case where we can't issue a rename operation for a directory as soon as we process it. We used to delay directory renames only if they have some ancestor directory with a higher inode number that got renamed too, but there's another case where we need to delay the rename too - when a directory A is renamed to the old name of a directory B but that directory B has its rename delayed because it has now (in the send root) an ancestor with a higher inode number that was renamed. If we don't delay the directory rename in this case, the receiving end of the send stream will attempt to rename A to the old name of B before B got renamed to its new name, which results in a "directory not empty" error. So fix this by delaying directory renames for this case too. Steps to reproduce: $ mkfs.btrfs -f /dev/sdb $ mount /dev/sdb /mnt $ mkdir /mnt/a $ mkdir /mnt/b $ mkdir /mnt/c $ touch /mnt/a/file $ btrfs subvolume snapshot -r /mnt /mnt/snap1 $ mv /mnt/c /mnt/x $ mv /mnt/a /mnt/x/y $ mv /mnt/b /mnt/a $ btrfs subvolume snapshot -r /mnt /mnt/snap2 $ btrfs send /mnt/snap1 -f /tmp/1.send $ btrfs send -p /mnt/snap1 /mnt/snap2 -f /tmp/2.send $ mkfs.btrfs -f /dev/sdc $ mount /dev/sdc /mnt2 $ btrfs receive /mnt2 -f /tmp/1.send $ btrfs receive /mnt2 -f /tmp/2.send ERROR: rename b -> a failed. Directory not empty A test case for xfstests follows soon. Reported-by: Ames Cornish <ames@cornishes.net> Signed-off-by: Filipe Manana <fdmanana@suse.com> Signed-off-by: Chris Mason <clm@fb.com>
2015-02-28 22:29:22 +00:00
Btrfs: incremental send, check if orphanized dir inode needs delayed rename If a directory inode is orphanized, because some inode previously processed has a new name that collides with the old name of the current inode, we need to check if it needs its rename operation delayed too, as its ancestor-descendent relationship with some other inode might have been reversed between the parent and send snapshots and therefore its rename operation needs to happen after that other inode is renamed. For example, for the following reproducer where this is needed (provided by Robbie Ko): $ mkfs.btrfs -f /dev/sdb $ mount /dev/sdb /mnt $ mkfs.btrfs -f /dev/sdc $ mount /dev/sdc /mnt2 $ mkdir -p /mnt/data/n1/n2 $ mkdir /mnt/data/n4 $ mkdir -p /mnt/data/t6/t7 $ mkdir /mnt/data/t5 $ mkdir /mnt/data/t7 $ mkdir /mnt/data/n4/t2 $ mkdir /mnt/data/t4 $ mkdir /mnt/data/t3 $ mv /mnt/data/t7 /mnt/data/n4/t2 $ mv /mnt/data/t4 /mnt/data/n4/t2/t7 $ mv /mnt/data/t5 /mnt/data/n4/t2/t7/t4 $ mv /mnt/data/t6 /mnt/data/n4/t2/t7/t4/t5 $ mv /mnt/data/n1/n2 /mnt/data/n4/t2/t7/t4/t5/t6 $ mv /mnt/data/n1 /mnt/data/n4/t2/t7/t4/t5/t6 $ mv /mnt/data/n4/t2/t7/t4/t5/t6/t7 /mnt/data/n4/t2/t7/t4/t5/t6/n2 $ mv /mnt/data/t3 /mnt/data/n4/t2/t7/t4/t5/t6/n2/t7 $ btrfs subvolume snapshot -r /mnt /mnt/snap1 $ mv /mnt/data/n4/t2/t7/t4/t5/t6/n1 /mnt/data/n4 $ mv /mnt/data/n4/t2 /mnt/data/n4/n1 $ mv /mnt/data/n4/n1/t2/t7/t4/t5/t6/n2 /mnt/data/n4/n1/t2 $ mv /mnt/data/n4/n1/t2/n2/t7/t3 /mnt/data/n4/n1/t2 $ mv /mnt/data/n4/n1/t2/t7/t4/t5/t6 /mnt/data/n4/n1/t2 $ mv /mnt/data/n4/n1/t2/t7/t4 /mnt/data/n4/n1/t2/t6 $ mv /mnt/data/n4/n1/t2/t7 /mnt/data/n4/n1/t2/t3 $ mv /mnt/data/n4/n1/t2/n2/t7 /mnt/data/n4/n1/t2 $ btrfs subvolume snapshot -r /mnt /mnt/snap2 $ btrfs send /mnt/snap1 | btrfs receive /mnt2 $ btrfs send -p /mnt/snap1 /mnt/snap2 | btrfs receive /mnt2 ERROR: send ioctl failed with -12: Cannot allocate memory Where the parent snapshot directory hierarchy is the following: . (ino 256) |-- data/ (ino 257) |-- n4/ (ino 260) |-- t2/ (ino 265) |-- t7/ (ino 264) |-- t4/ (ino 266) |-- t5/ (ino 263) |-- t6/ (ino 261) |-- n1/ (ino 258) |-- n2/ (ino 259) |-- t7/ (ino 262) |-- t3/ (ino 267) And the send snapshot's directory hierarchy is the following: . (ino 256) |-- data/ (ino 257) |-- n4/ (ino 260) |-- n1/ (ino 258) |-- t2/ (ino 265) |-- n2/ (ino 259) |-- t3/ (ino 267) | |-- t7 (ino 264) | |-- t6/ (ino 261) | |-- t4/ (ino 266) | |-- t5/ (ino 263) | |-- t7/ (ino 262) While processing inode 262 we orphanize inode 264 and later attempt to rename inode 264 to its new name/location, which resulted in building an incorrect destination path string for the rename operation with the value "data/n4/t2/t7/t4/t5/t6/n2/t7/t3/t7". This rename operation must have been done only after inode 267 is processed and renamed, as the ancestor-descendent relationship between inodes 264 and 267 was reversed between both snapshots, because otherwise it results in an infinite loop when building the path string for inode 264 when we are processing an inode with a number larger than 264. That loop is the following: start inode 264, send progress of 265 for example parent of 264 -> 267 parent of 267 -> 262 parent of 262 -> 259 parent of 259 -> 261 parent of 261 -> 263 parent of 263 -> 266 parent of 266 -> 264 |--> back to first iteration while current path string length is <= PATH_MAX, and fail with -ENOMEM otherwise So fix this by making the check if we need to delay a directory rename regardless of the current inode having been orphanized or not. A test case for fstests follows soon. Thanks to Robbie Ko for providing a reproducer for this problem. Reported-by: Robbie Ko <robbieko@synology.com> Signed-off-by: Filipe Manana <fdmanana@suse.com>
2015-04-09 14:09:14 +01:00
Btrfs: send, fix more issues related to directory renames This is a continuation of the previous changes titled: Btrfs: fix incremental send's decision to delay a dir move/rename Btrfs: part 2, fix incremental send's decision to delay a dir move/rename There's a few more cases where a directory rename/move must be delayed which was previously overlooked. If our immediate ancestor has a lower inode number than ours and it doesn't have a delayed rename/move operation associated to it, it doesn't mean there isn't any non-direct ancestor of our current inode that needs to be renamed/moved before our current inode (i.e. with a higher inode number than ours). So we can't stop the search if our immediate ancestor has a lower inode number than ours, we need to navigate the directory hierarchy upwards until we hit the root or: 1) find an ancestor with an higher inode number that was renamed/moved in the send root too (or already has a pending rename/move registered); 2) find an ancestor that is a new directory (higher inode number than ours and exists only in the send root). Reproducer for case 1) $ mkfs.btrfs -f /dev/sdd $ mount /dev/sdd /mnt $ mkdir -p /mnt/a/b $ mkdir -p /mnt/a/c/d $ mkdir /mnt/a/b/e $ mkdir /mnt/a/c/d/f $ mv /mnt/a/b /mnt/a/c/d/2b $ mkdir /mnt/a/x $ mkdir /mnt/a/y $ btrfs subvolume snapshot -r /mnt /mnt/snap1 $ btrfs send /mnt/snap1 -f /tmp/base.send $ mv /mnt/a/x /mnt/a/y $ mv /mnt/a/c/d/2b/e /mnt/a/c/d/2b/2e $ mv /mnt/a/c/d /mnt/a/h/2d $ mv /mnt/a/c /mnt/a/h/2d/2b/2c $ btrfs subvolume snapshot -r /mnt /mnt/snap2 $ btrfs send -p /mnt/snap1 /mnt/snap2 -f /tmp/incremental.send Simple reproducer for case 2) $ mkfs.btrfs -f /dev/sdd $ mount /dev/sdd /mnt $ mkdir -p /mnt/a/b $ mkdir /mnt/a/c $ mv /mnt/a/b /mnt/a/c/b2 $ mkdir /mnt/a/e $ btrfs subvolume snapshot -r /mnt /mnt/snap1 $ btrfs send /mnt/snap1 -f /tmp/base.send $ mv /mnt/a/c/b2 /mnt/a/e/b3 $ mkdir /mnt/a/e/b3/f $ mkdir /mnt/a/h $ mv /mnt/a/c /mnt/a/e/b3/f/c2 $ mv /mnt/a/e /mnt/a/h/e2 $ btrfs subvolume snapshot -r /mnt /mnt/snap2 $ btrfs send -p /mnt/snap1 /mnt/snap2 -f /tmp/incremental.send Another simple reproducer for case 2) $ mkfs.btrfs -f /dev/sdd $ mount /dev/sdd /mnt $ mkdir -p /mnt/a/b $ mkdir /mnt/a/c $ mkdir /mnt/a/b/d $ mkdir /mnt/a/c/e $ btrfs subvolume snapshot -r /mnt /mnt/snap1 $ btrfs send /mnt/snap1 -f /tmp/base.send $ mkdir /mnt/a/b/d/f $ mkdir /mnt/a/b/g $ mv /mnt/a/c/e /mnt/a/b/g/e2 $ mv /mnt/a/c /mnt/a/b/d/f/c2 $ mv /mnt/a/b/d/f /mnt/a/b/g/e2/f2 $ btrfs subvolume snapshot -r /mnt /mnt/snap2 $ btrfs send -p /mnt/snap1 /mnt/snap2 -f /tmp/incremental.send More complex reproducer for case 2) $ mkfs.btrfs -f /dev/sdd $ mount /dev/sdd /mnt $ mkdir -p /mnt/a/b $ mkdir -p /mnt/a/c/d $ mkdir /mnt/a/b/e $ mkdir /mnt/a/c/d/f $ mv /mnt/a/b /mnt/a/c/d/2b $ mkdir /mnt/a/x $ mkdir /mnt/a/y $ btrfs subvolume snapshot -r /mnt /mnt/snap1 $ btrfs send /mnt/snap1 -f /tmp/base.send $ mv /mnt/a/x /mnt/a/y $ mv /mnt/a/c/d/2b/e /mnt/a/c/d/2b/2e $ mv /mnt/a/c/d /mnt/a/h/2d $ mv /mnt/a/c /mnt/a/h/2d/2b/2c $ btrfs subvolume snapshot -r /mnt /mnt/snap2 $ btrfs send -p /mnt/snap1 /mnt/snap2 -f /tmp/incremental.send For both cases the incremental send would enter an infinite loop when building path strings. While solving these cases, this change also re-implements the code to detect when directory moves/renames should be delayed. Instead of dealing with several specific cases separately, it's now more generic handling all cases with a simple detection algorithm and if when applying a delayed move/rename there's a path loop detected, it further delays the move/rename registering a new ancestor inode as the dependency inode (so our rename happens after that ancestor is renamed). Tests for these cases is being added to xfstests too. Signed-off-by: Filipe David Borba Manana <fdmanana@gmail.com> Signed-off-by: Chris Mason <clm@fb.com>
2014-03-27 20:14:01 +00:00
Btrfs: fix infinite path build loops in incremental send The send operation processes inodes by their ascending number, and assumes that any rename/move operation can be successfully performed (sent to the caller) once all previous inodes (those with a smaller inode number than the one we're currently processing) were processed. This is not true when an incremental send had to process an hierarchical change between 2 snapshots where the parent-children relationship between directory inodes was reversed - that is, parents became children and children became parents. This situation made the path building code go into an infinite loop, which kept allocating more and more memory that eventually lead to a krealloc warning being displayed in dmesg: WARNING: CPU: 1 PID: 5705 at mm/page_alloc.c:2477 __alloc_pages_nodemask+0x365/0xad0() Modules linked in: btrfs raid6_pq xor pci_stub vboxpci(O) vboxnetadp(O) vboxnetflt(O) vboxdrv(O) snd_hda_codec_hdmi snd_hda_codec_realtek joydev radeon snd_hda_intel snd_hda_codec snd_hwdep snd_seq_midi snd_pcm psmouse i915 snd_rawmidi serio_raw snd_seq_midi_event lpc_ich snd_seq snd_timer ttm snd_seq_device rfcomm drm_kms_helper parport_pc bnep bluetooth drm ppdev snd soundcore i2c_algo_bit snd_page_alloc binfmt_misc video lp parport r8169 mii hid_generic usbhid hid CPU: 1 PID: 5705 Comm: btrfs Tainted: G O 3.13.0-rc7-fdm-btrfs-next-18+ #3 Hardware name: To Be Filled By O.E.M. To Be Filled By O.E.M./Z77 Pro4, BIOS P1.50 09/04/2012 [ 5381.660441] 00000000000009ad ffff8806f6f2f4e8 ffffffff81777434 0000000000000007 [ 5381.660447] 0000000000000000 ffff8806f6f2f528 ffffffff8104a9ec ffff8807038f36f0 [ 5381.660452] 0000000000000000 0000000000000206 ffff8807038f2490 ffff8807038f36f0 [ 5381.660457] Call Trace: [ 5381.660464] [<ffffffff81777434>] dump_stack+0x4e/0x68 [ 5381.660471] [<ffffffff8104a9ec>] warn_slowpath_common+0x8c/0xc0 [ 5381.660476] [<ffffffff8104aa3a>] warn_slowpath_null+0x1a/0x20 [ 5381.660480] [<ffffffff81144995>] __alloc_pages_nodemask+0x365/0xad0 [ 5381.660487] [<ffffffff8108313f>] ? local_clock+0x4f/0x60 [ 5381.660491] [<ffffffff811430e8>] ? free_one_page+0x98/0x440 [ 5381.660495] [<ffffffff8108313f>] ? local_clock+0x4f/0x60 [ 5381.660502] [<ffffffff8113fae4>] ? __get_free_pages+0x14/0x50 [ 5381.660508] [<ffffffff81095fb8>] ? trace_hardirqs_off_caller+0x28/0xd0 [ 5381.660515] [<ffffffff81183caf>] alloc_pages_current+0x10f/0x1f0 [ 5381.660520] [<ffffffff8113fae4>] ? __get_free_pages+0x14/0x50 [ 5381.660524] [<ffffffff8113fae4>] __get_free_pages+0x14/0x50 [ 5381.660530] [<ffffffff8115dace>] kmalloc_order_trace+0x3e/0x100 [ 5381.660536] [<ffffffff81191ea0>] __kmalloc_track_caller+0x220/0x230 [ 5381.660560] [<ffffffffa0729fdb>] ? fs_path_ensure_buf.part.12+0x6b/0x200 [btrfs] [ 5381.660564] [<ffffffff8178085c>] ? retint_restore_args+0xe/0xe [ 5381.660569] [<ffffffff811580ef>] krealloc+0x6f/0xb0 [ 5381.660586] [<ffffffffa0729fdb>] fs_path_ensure_buf.part.12+0x6b/0x200 [btrfs] [ 5381.660601] [<ffffffffa072a208>] fs_path_prepare_for_add+0x98/0xb0 [btrfs] [ 5381.660615] [<ffffffffa072a2bc>] fs_path_add_path+0x2c/0x60 [btrfs] [ 5381.660628] [<ffffffffa072c55c>] get_cur_path+0x7c/0x1c0 [btrfs] Even without this loop, the incremental send couldn't succeed, because it would attempt to send a rename/move operation for the lower inode before the highest inode number was renamed/move. This issue is easy to trigger with the following steps: $ mkfs.btrfs -f /dev/sdb3 $ mount /dev/sdb3 /mnt/btrfs $ mkdir -p /mnt/btrfs/a/b/c/d $ mkdir /mnt/btrfs/a/b/c2 $ btrfs subvol snapshot -r /mnt/btrfs /mnt/btrfs/snap1 $ mv /mnt/btrfs/a/b/c/d /mnt/btrfs/a/b/c2/d2 $ mv /mnt/btrfs/a/b/c /mnt/btrfs/a/b/c2/d2/cc $ btrfs subvol snapshot -r /mnt/btrfs /mnt/btrfs/snap2 $ btrfs send -p /mnt/btrfs/snap1 /mnt/btrfs/snap2 > /tmp/incremental.send The structure of the filesystem when the first snapshot is taken is: . (ino 256) |-- a (ino 257) |-- b (ino 258) |-- c (ino 259) | |-- d (ino 260) | |-- c2 (ino 261) And its structure when the second snapshot is taken is: . (ino 256) |-- a (ino 257) |-- b (ino 258) |-- c2 (ino 261) |-- d2 (ino 260) |-- cc (ino 259) Before the move/rename operation is performed for the inode 259, the move/rename for inode 260 must be performed, since 259 is now a child of 260. A test case for xfstests, with a more complex scenario, will follow soon. Signed-off-by: Filipe David Borba Manana <fdmanana@gmail.com> Signed-off-by: Josef Bacik <jbacik@fb.com> Signed-off-by: Chris Mason <clm@fb.com>
2014-01-22 10:00:53 +00:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: fix infinite path build loops in incremental send The send operation processes inodes by their ascending number, and assumes that any rename/move operation can be successfully performed (sent to the caller) once all previous inodes (those with a smaller inode number than the one we're currently processing) were processed. This is not true when an incremental send had to process an hierarchical change between 2 snapshots where the parent-children relationship between directory inodes was reversed - that is, parents became children and children became parents. This situation made the path building code go into an infinite loop, which kept allocating more and more memory that eventually lead to a krealloc warning being displayed in dmesg: WARNING: CPU: 1 PID: 5705 at mm/page_alloc.c:2477 __alloc_pages_nodemask+0x365/0xad0() Modules linked in: btrfs raid6_pq xor pci_stub vboxpci(O) vboxnetadp(O) vboxnetflt(O) vboxdrv(O) snd_hda_codec_hdmi snd_hda_codec_realtek joydev radeon snd_hda_intel snd_hda_codec snd_hwdep snd_seq_midi snd_pcm psmouse i915 snd_rawmidi serio_raw snd_seq_midi_event lpc_ich snd_seq snd_timer ttm snd_seq_device rfcomm drm_kms_helper parport_pc bnep bluetooth drm ppdev snd soundcore i2c_algo_bit snd_page_alloc binfmt_misc video lp parport r8169 mii hid_generic usbhid hid CPU: 1 PID: 5705 Comm: btrfs Tainted: G O 3.13.0-rc7-fdm-btrfs-next-18+ #3 Hardware name: To Be Filled By O.E.M. To Be Filled By O.E.M./Z77 Pro4, BIOS P1.50 09/04/2012 [ 5381.660441] 00000000000009ad ffff8806f6f2f4e8 ffffffff81777434 0000000000000007 [ 5381.660447] 0000000000000000 ffff8806f6f2f528 ffffffff8104a9ec ffff8807038f36f0 [ 5381.660452] 0000000000000000 0000000000000206 ffff8807038f2490 ffff8807038f36f0 [ 5381.660457] Call Trace: [ 5381.660464] [<ffffffff81777434>] dump_stack+0x4e/0x68 [ 5381.660471] [<ffffffff8104a9ec>] warn_slowpath_common+0x8c/0xc0 [ 5381.660476] [<ffffffff8104aa3a>] warn_slowpath_null+0x1a/0x20 [ 5381.660480] [<ffffffff81144995>] __alloc_pages_nodemask+0x365/0xad0 [ 5381.660487] [<ffffffff8108313f>] ? local_clock+0x4f/0x60 [ 5381.660491] [<ffffffff811430e8>] ? free_one_page+0x98/0x440 [ 5381.660495] [<ffffffff8108313f>] ? local_clock+0x4f/0x60 [ 5381.660502] [<ffffffff8113fae4>] ? __get_free_pages+0x14/0x50 [ 5381.660508] [<ffffffff81095fb8>] ? trace_hardirqs_off_caller+0x28/0xd0 [ 5381.660515] [<ffffffff81183caf>] alloc_pages_current+0x10f/0x1f0 [ 5381.660520] [<ffffffff8113fae4>] ? __get_free_pages+0x14/0x50 [ 5381.660524] [<ffffffff8113fae4>] __get_free_pages+0x14/0x50 [ 5381.660530] [<ffffffff8115dace>] kmalloc_order_trace+0x3e/0x100 [ 5381.660536] [<ffffffff81191ea0>] __kmalloc_track_caller+0x220/0x230 [ 5381.660560] [<ffffffffa0729fdb>] ? fs_path_ensure_buf.part.12+0x6b/0x200 [btrfs] [ 5381.660564] [<ffffffff8178085c>] ? retint_restore_args+0xe/0xe [ 5381.660569] [<ffffffff811580ef>] krealloc+0x6f/0xb0 [ 5381.660586] [<ffffffffa0729fdb>] fs_path_ensure_buf.part.12+0x6b/0x200 [btrfs] [ 5381.660601] [<ffffffffa072a208>] fs_path_prepare_for_add+0x98/0xb0 [btrfs] [ 5381.660615] [<ffffffffa072a2bc>] fs_path_add_path+0x2c/0x60 [btrfs] [ 5381.660628] [<ffffffffa072c55c>] get_cur_path+0x7c/0x1c0 [btrfs] Even without this loop, the incremental send couldn't succeed, because it would attempt to send a rename/move operation for the lower inode before the highest inode number was renamed/move. This issue is easy to trigger with the following steps: $ mkfs.btrfs -f /dev/sdb3 $ mount /dev/sdb3 /mnt/btrfs $ mkdir -p /mnt/btrfs/a/b/c/d $ mkdir /mnt/btrfs/a/b/c2 $ btrfs subvol snapshot -r /mnt/btrfs /mnt/btrfs/snap1 $ mv /mnt/btrfs/a/b/c/d /mnt/btrfs/a/b/c2/d2 $ mv /mnt/btrfs/a/b/c /mnt/btrfs/a/b/c2/d2/cc $ btrfs subvol snapshot -r /mnt/btrfs /mnt/btrfs/snap2 $ btrfs send -p /mnt/btrfs/snap1 /mnt/btrfs/snap2 > /tmp/incremental.send The structure of the filesystem when the first snapshot is taken is: . (ino 256) |-- a (ino 257) |-- b (ino 258) |-- c (ino 259) | |-- d (ino 260) | |-- c2 (ino 261) And its structure when the second snapshot is taken is: . (ino 256) |-- a (ino 257) |-- b (ino 258) |-- c2 (ino 261) |-- d2 (ino 260) |-- cc (ino 259) Before the move/rename operation is performed for the inode 259, the move/rename for inode 260 must be performed, since 259 is now a child of 260. A test case for xfstests, with a more complex scenario, will follow soon. Signed-off-by: Filipe David Borba Manana <fdmanana@gmail.com> Signed-off-by: Josef Bacik <jbacik@fb.com> Signed-off-by: Chris Mason <clm@fb.com>
2014-01-22 10:00:53 +00:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: fix cur_ino < parent_ino case for send/receive When the current inodes inum is smaller then the inum of the parent directory strange things were happending due to wrong path resolution and other bugs. Fix this with a new approach for the problem. Reported-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com> Signed-off-by: Alexander Block <ablock84@googlemail.com>
2012-07-28 10:42:24 +02:00
Btrfs: fix send issues related to inode number reuse If you are sending a snapshot and specifying a parent snapshot we will walk the trees and figure out where they differ and send the differences only. The way we check for differences are if the leaves aren't the same and if the keys are not the same within the leaves. So if neither leaf is the same (ie the leaf has been cow'ed from the parent snapshot) we walk each item in the send root and check it against the parent root. If the items match exactly then we don't do anything. This doesn't quite work for inode refs, since they will just have the name and the parent objectid. If you move the file from a directory and then remove that directory and re-create a directory with the same inode number as the old directory and then move that file back into that directory we will assume that nothing changed and you will get errors when you try to receive. In order to fix this we need to do extra checking to see if the inode ref really is the same or not. So do this by passing down BTRFS_COMPARE_TREE_SAME if the items match. Then if the key type is an inode ref we can do some extra checking, otherwise we just keep processing. The extra checking is to look up the generation of the directory in the parent volume and compare it to the generation of the send volume. If they match then they are the same directory and we are good to go. If they don't we have to add them to the changed refs list. This means we have to track the generation of the ref we're trying to lookup when we iterate all the refs for a particular inode. So in the case of looking for new refs we have to get the generation from the parent volume, and in the case of looking for deleted refs we have to get the generation from the send volume to compare with. There was also the issue of using a ulist to keep track of the directories we needed to check. Because we can get a deleted ref and a new ref for the same inode number the ulist won't work since it indexes based on the value. So instead just dup any directory ref we find and add it to a local list, and then process that list as normal and do away with using a ulist for this altogether. Before we would fail all of the tests in the far-progs that related to moving directories (test group 32). With this patch we now pass these tests, and all of the tests in the far-progs send testing suite. Thanks, Signed-off-by: Josef Bacik <jbacik@fusionio.com> Signed-off-by: Chris Mason <chris.mason@fusionio.com>
2013-08-16 16:52:55 -04:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: uninit variable fixes in send/receive Signed-off-by: Chris Mason <chris.mason@fusionio.com>
2012-07-25 19:21:10 -04:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: send, don't send rmdir for same target multiple times When doing an incremental send, if we delete a directory that has N > 1 hardlinks for the same file and that file has the highest inode number inside the directory contents, an incremental send would send N times an rmdir operation against the directory. This made the btrfs receive command fail on the second rmdir instruction, as the target directory didn't exist anymore. Steps to reproduce the issue: $ mkfs.btrfs -f /dev/sdb3 $ mount /dev/sdb3 /mnt/btrfs $ mkdir -p /mnt/btrfs/a/b/c $ echo 'ola mundo' > /mnt/btrfs/a/b/c/foo.txt $ ln /mnt/btrfs/a/b/c/foo.txt /mnt/btrfs/a/b/c/bar.txt $ btrfs subvolume snapshot -r /mnt/btrfs /mnt/btrfs/snap1 $ btrfs send /mnt/btrfs/snap1 -f /tmp/base.send $ rm -f /mnt/btrfs/a/b/c/foo.txt $ rm -f /mnt/btrfs/a/b/c/bar.txt $ rmdir /mnt/btrfs/a/b/c $ btrfs subvolume snapshot -r /mnt/btrfs /mnt/btrfs/snap2 $ btrfs send -p /mnt/btrfs/snap1 /mnt/btrfs/snap2 -f /tmp/incremental.send $ umount /mnt/btrfs $ mkfs.btrfs -f /dev/sdb3 $ mount /dev/sdb3 /mnt/btrfs $ btrfs receive /mnt/btrfs -f /tmp/base.send $ btrfs receive /mnt/btrfs -f /tmp/incremental.send The second btrfs receive command failed with: ERROR: rmdir o259-6-0 failed. No such file or directory A test case for xfstests follows. Signed-off-by: Filipe David Borba Manana <fdmanana@gmail.com> Signed-off-by: Josef Bacik <jbacik@fb.com>
2014-02-16 21:01:39 +00:00
Btrfs: incremental send, don't rename a directory too soon There's one more case where we can't issue a rename operation for a directory as soon as we process it. We used to delay directory renames only if they have some ancestor directory with a higher inode number that got renamed too, but there's another case where we need to delay the rename too - when a directory A is renamed to the old name of a directory B but that directory B has its rename delayed because it has now (in the send root) an ancestor with a higher inode number that was renamed. If we don't delay the directory rename in this case, the receiving end of the send stream will attempt to rename A to the old name of B before B got renamed to its new name, which results in a "directory not empty" error. So fix this by delaying directory renames for this case too. Steps to reproduce: $ mkfs.btrfs -f /dev/sdb $ mount /dev/sdb /mnt $ mkdir /mnt/a $ mkdir /mnt/b $ mkdir /mnt/c $ touch /mnt/a/file $ btrfs subvolume snapshot -r /mnt /mnt/snap1 $ mv /mnt/c /mnt/x $ mv /mnt/a /mnt/x/y $ mv /mnt/b /mnt/a $ btrfs subvolume snapshot -r /mnt /mnt/snap2 $ btrfs send /mnt/snap1 -f /tmp/1.send $ btrfs send -p /mnt/snap1 /mnt/snap2 -f /tmp/2.send $ mkfs.btrfs -f /dev/sdc $ mount /dev/sdc /mnt2 $ btrfs receive /mnt2 -f /tmp/1.send $ btrfs receive /mnt2 -f /tmp/2.send ERROR: rename b -> a failed. Directory not empty A test case for xfstests follows soon. Reported-by: Ames Cornish <ames@cornishes.net> Signed-off-by: Filipe Manana <fdmanana@suse.com> Signed-off-by: Chris Mason <clm@fb.com>
2015-02-28 22:29:22 +00:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: don't treat top/root directory inode as deleted/reused We can't do the deleted/reused logic for top/root inodes as it would create a stream that tries to delete and recreate the root dir. Reported-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com> Signed-off-by: Alexander Block <ablock84@googlemail.com>
2012-08-01 14:48:59 +02:00
Btrfs: fix send issues related to inode number reuse If you are sending a snapshot and specifying a parent snapshot we will walk the trees and figure out where they differ and send the differences only. The way we check for differences are if the leaves aren't the same and if the keys are not the same within the leaves. So if neither leaf is the same (ie the leaf has been cow'ed from the parent snapshot) we walk each item in the send root and check it against the parent root. If the items match exactly then we don't do anything. This doesn't quite work for inode refs, since they will just have the name and the parent objectid. If you move the file from a directory and then remove that directory and re-create a directory with the same inode number as the old directory and then move that file back into that directory we will assume that nothing changed and you will get errors when you try to receive. In order to fix this we need to do extra checking to see if the inode ref really is the same or not. So do this by passing down BTRFS_COMPARE_TREE_SAME if the items match. Then if the key type is an inode ref we can do some extra checking, otherwise we just keep processing. The extra checking is to look up the generation of the directory in the parent volume and compare it to the generation of the send volume. If they match then they are the same directory and we are good to go. If they don't we have to add them to the changed refs list. This means we have to track the generation of the ref we're trying to lookup when we iterate all the refs for a particular inode. So in the case of looking for new refs we have to get the generation from the parent volume, and in the case of looking for deleted refs we have to get the generation from the send volume to compare with. There was also the issue of using a ulist to keep track of the directories we needed to check. Because we can get a deleted ref and a new ref for the same inode number the ulist won't work since it indexes based on the value. So instead just dup any directory ref we find and add it to a local list, and then process that list as normal and do away with using a ulist for this altogether. Before we would fail all of the tests in the far-progs that related to moving directories (test group 32). With this patch we now pass these tests, and all of the tests in the far-progs send testing suite. Thanks, Signed-off-by: Josef Bacik <jbacik@fusionio.com> Signed-off-by: Chris Mason <chris.mason@fusionio.com>
2013-08-16 16:52:55 -04:00
Btrfs: don't treat top/root directory inode as deleted/reused We can't do the deleted/reused logic for top/root inodes as it would create a stream that tries to delete and recreate the root dir. Reported-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com> Signed-off-by: Alexander Block <ablock84@googlemail.com>
2012-08-01 14:48:59 +02:00
Btrfs: cleanup unused arguments in send.c sctx is removed from the argument of the function that doesn't use sctx. Signed-off-by: Tsutomu Itoh <t-itoh@jp.fujitsu.com> Signed-off-by: Josef Bacik <jbacik@fusionio.com>
2013-05-08 07:51:52 +00:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: fix cur_ino < parent_ino case for send/receive When the current inodes inum is smaller then the inum of the parent directory strange things were happending due to wrong path resolution and other bugs. Fix this with a new approach for the problem. Reported-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com> Signed-off-by: Alexander Block <ablock84@googlemail.com>
2012-07-28 10:42:24 +02:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: cleanup unused arguments in send.c sctx is removed from the argument of the function that doesn't use sctx. Signed-off-by: Tsutomu Itoh <t-itoh@jp.fujitsu.com> Signed-off-by: Josef Bacik <jbacik@fusionio.com>
2013-05-08 07:51:52 +00:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: incremental send, clear name from cache after orphanization If a directory's reference ends up being orphanized, because the inode currently being processed has a new path that matches that directory's path, make sure we evict the name of the directory from the name cache. This is because there might be descendent inodes (either directories or regular files) that will be orphanized later too, and therefore the orphan name of the ancestor must be used, otherwise we send issue rename operations with a wrong path in the send stream. Reproducer: $ mkfs.btrfs -f /dev/sdb $ mount /dev/sdb /mnt $ mkdir -p /mnt/data/n1/n2/p1/p2 $ mkdir /mnt/data/n4 $ mkdir -p /mnt/data/p1/p2 $ btrfs subvolume snapshot -r /mnt /mnt/snap1 $ mv /mnt/data/p1/p2 /mnt/data $ mv /mnt/data/n1/n2/p1/p2 /mnt/data/p1 $ mv /mnt/data/p2 /mnt/data/n1/n2/p1 $ mv /mnt/data/n1/n2 /mnt/data/p1 $ mv /mnt/data/p1 /mnt/data/n4 $ mv /mnt/data/n4/p1/n2/p1 /mnt/data $ btrfs subvolume snapshot -r /mnt /mnt/snap2 $ btrfs send /mnt/snap1 -f /tmp/1.send $ btrfs send -p /mnt/snap1 /mnt/snap2 -f /tmp/2.send $ mkfs.btrfs -f /dev/sdc $ mount /dev/sdc /mnt2 $ btrfs receive /mnt2 -f /tmp/1.send $ btrfs receive /mnt2 -f /tmp/2.send ERROR: rename data/p1/p2 -> data/n4/p1/p2 failed. no such file or directory Directories data/p1 (inode 263) and data/p1/p2 (inode 264) in the parent snapshot are both orphanized during the incremental send, and as soon as data/p1 is orphanized, we must make sure that when orphanizing data/p1/p2 we use a source path of o263-6-o/p2 for the rename operation instead of the old path data/p1/p2 (the one before the orphanization of inode 263). A test case for xfstests follows soon. Reported-by: Robbie Ko <robbieko@synology.com> Signed-off-by: Filipe Manana <fdmanana@suse.com> Signed-off-by: Chris Mason <clm@fb.com>
2015-03-12 15:16:20 +00:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: incremental send, clear name from cache after orphanization If a directory's reference ends up being orphanized, because the inode currently being processed has a new path that matches that directory's path, make sure we evict the name of the directory from the name cache. This is because there might be descendent inodes (either directories or regular files) that will be orphanized later too, and therefore the orphan name of the ancestor must be used, otherwise we send issue rename operations with a wrong path in the send stream. Reproducer: $ mkfs.btrfs -f /dev/sdb $ mount /dev/sdb /mnt $ mkdir -p /mnt/data/n1/n2/p1/p2 $ mkdir /mnt/data/n4 $ mkdir -p /mnt/data/p1/p2 $ btrfs subvolume snapshot -r /mnt /mnt/snap1 $ mv /mnt/data/p1/p2 /mnt/data $ mv /mnt/data/n1/n2/p1/p2 /mnt/data/p1 $ mv /mnt/data/p2 /mnt/data/n1/n2/p1 $ mv /mnt/data/n1/n2 /mnt/data/p1 $ mv /mnt/data/p1 /mnt/data/n4 $ mv /mnt/data/n4/p1/n2/p1 /mnt/data $ btrfs subvolume snapshot -r /mnt /mnt/snap2 $ btrfs send /mnt/snap1 -f /tmp/1.send $ btrfs send -p /mnt/snap1 /mnt/snap2 -f /tmp/2.send $ mkfs.btrfs -f /dev/sdc $ mount /dev/sdc /mnt2 $ btrfs receive /mnt2 -f /tmp/1.send $ btrfs receive /mnt2 -f /tmp/2.send ERROR: rename data/p1/p2 -> data/n4/p1/p2 failed. no such file or directory Directories data/p1 (inode 263) and data/p1/p2 (inode 264) in the parent snapshot are both orphanized during the incremental send, and as soon as data/p1 is orphanized, we must make sure that when orphanizing data/p1/p2 we use a source path of o263-6-o/p2 for the rename operation instead of the old path data/p1/p2 (the one before the orphanization of inode 263). A test case for xfstests follows soon. Reported-by: Robbie Ko <robbieko@synology.com> Signed-off-by: Filipe Manana <fdmanana@suse.com> Signed-off-by: Chris Mason <clm@fb.com>
2015-03-12 15:16:20 +00:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: incremental send, don't rename a directory too soon There's one more case where we can't issue a rename operation for a directory as soon as we process it. We used to delay directory renames only if they have some ancestor directory with a higher inode number that got renamed too, but there's another case where we need to delay the rename too - when a directory A is renamed to the old name of a directory B but that directory B has its rename delayed because it has now (in the send root) an ancestor with a higher inode number that was renamed. If we don't delay the directory rename in this case, the receiving end of the send stream will attempt to rename A to the old name of B before B got renamed to its new name, which results in a "directory not empty" error. So fix this by delaying directory renames for this case too. Steps to reproduce: $ mkfs.btrfs -f /dev/sdb $ mount /dev/sdb /mnt $ mkdir /mnt/a $ mkdir /mnt/b $ mkdir /mnt/c $ touch /mnt/a/file $ btrfs subvolume snapshot -r /mnt /mnt/snap1 $ mv /mnt/c /mnt/x $ mv /mnt/a /mnt/x/y $ mv /mnt/b /mnt/a $ btrfs subvolume snapshot -r /mnt /mnt/snap2 $ btrfs send /mnt/snap1 -f /tmp/1.send $ btrfs send -p /mnt/snap1 /mnt/snap2 -f /tmp/2.send $ mkfs.btrfs -f /dev/sdc $ mount /dev/sdc /mnt2 $ btrfs receive /mnt2 -f /tmp/1.send $ btrfs receive /mnt2 -f /tmp/2.send ERROR: rename b -> a failed. Directory not empty A test case for xfstests follows soon. Reported-by: Ames Cornish <ames@cornishes.net> Signed-off-by: Filipe Manana <fdmanana@suse.com> Signed-off-by: Chris Mason <clm@fb.com>
2015-02-28 22:29:22 +00:00
Btrfs: incremental send, check if orphanized dir inode needs delayed rename If a directory inode is orphanized, because some inode previously processed has a new name that collides with the old name of the current inode, we need to check if it needs its rename operation delayed too, as its ancestor-descendent relationship with some other inode might have been reversed between the parent and send snapshots and therefore its rename operation needs to happen after that other inode is renamed. For example, for the following reproducer where this is needed (provided by Robbie Ko): $ mkfs.btrfs -f /dev/sdb $ mount /dev/sdb /mnt $ mkfs.btrfs -f /dev/sdc $ mount /dev/sdc /mnt2 $ mkdir -p /mnt/data/n1/n2 $ mkdir /mnt/data/n4 $ mkdir -p /mnt/data/t6/t7 $ mkdir /mnt/data/t5 $ mkdir /mnt/data/t7 $ mkdir /mnt/data/n4/t2 $ mkdir /mnt/data/t4 $ mkdir /mnt/data/t3 $ mv /mnt/data/t7 /mnt/data/n4/t2 $ mv /mnt/data/t4 /mnt/data/n4/t2/t7 $ mv /mnt/data/t5 /mnt/data/n4/t2/t7/t4 $ mv /mnt/data/t6 /mnt/data/n4/t2/t7/t4/t5 $ mv /mnt/data/n1/n2 /mnt/data/n4/t2/t7/t4/t5/t6 $ mv /mnt/data/n1 /mnt/data/n4/t2/t7/t4/t5/t6 $ mv /mnt/data/n4/t2/t7/t4/t5/t6/t7 /mnt/data/n4/t2/t7/t4/t5/t6/n2 $ mv /mnt/data/t3 /mnt/data/n4/t2/t7/t4/t5/t6/n2/t7 $ btrfs subvolume snapshot -r /mnt /mnt/snap1 $ mv /mnt/data/n4/t2/t7/t4/t5/t6/n1 /mnt/data/n4 $ mv /mnt/data/n4/t2 /mnt/data/n4/n1 $ mv /mnt/data/n4/n1/t2/t7/t4/t5/t6/n2 /mnt/data/n4/n1/t2 $ mv /mnt/data/n4/n1/t2/n2/t7/t3 /mnt/data/n4/n1/t2 $ mv /mnt/data/n4/n1/t2/t7/t4/t5/t6 /mnt/data/n4/n1/t2 $ mv /mnt/data/n4/n1/t2/t7/t4 /mnt/data/n4/n1/t2/t6 $ mv /mnt/data/n4/n1/t2/t7 /mnt/data/n4/n1/t2/t3 $ mv /mnt/data/n4/n1/t2/n2/t7 /mnt/data/n4/n1/t2 $ btrfs subvolume snapshot -r /mnt /mnt/snap2 $ btrfs send /mnt/snap1 | btrfs receive /mnt2 $ btrfs send -p /mnt/snap1 /mnt/snap2 | btrfs receive /mnt2 ERROR: send ioctl failed with -12: Cannot allocate memory Where the parent snapshot directory hierarchy is the following: . (ino 256) |-- data/ (ino 257) |-- n4/ (ino 260) |-- t2/ (ino 265) |-- t7/ (ino 264) |-- t4/ (ino 266) |-- t5/ (ino 263) |-- t6/ (ino 261) |-- n1/ (ino 258) |-- n2/ (ino 259) |-- t7/ (ino 262) |-- t3/ (ino 267) And the send snapshot's directory hierarchy is the following: . (ino 256) |-- data/ (ino 257) |-- n4/ (ino 260) |-- n1/ (ino 258) |-- t2/ (ino 265) |-- n2/ (ino 259) |-- t3/ (ino 267) | |-- t7 (ino 264) | |-- t6/ (ino 261) | |-- t4/ (ino 266) | |-- t5/ (ino 263) | |-- t7/ (ino 262) While processing inode 262 we orphanize inode 264 and later attempt to rename inode 264 to its new name/location, which resulted in building an incorrect destination path string for the rename operation with the value "data/n4/t2/t7/t4/t5/t6/n2/t7/t3/t7". This rename operation must have been done only after inode 267 is processed and renamed, as the ancestor-descendent relationship between inodes 264 and 267 was reversed between both snapshots, because otherwise it results in an infinite loop when building the path string for inode 264 when we are processing an inode with a number larger than 264. That loop is the following: start inode 264, send progress of 265 for example parent of 264 -> 267 parent of 267 -> 262 parent of 262 -> 259 parent of 259 -> 261 parent of 261 -> 263 parent of 263 -> 266 parent of 266 -> 264 |--> back to first iteration while current path string length is <= PATH_MAX, and fail with -ENOMEM otherwise So fix this by making the check if we need to delay a directory rename regardless of the current inode having been orphanized or not. A test case for fstests follows soon. Thanks to Robbie Ko for providing a reproducer for this problem. Reported-by: Robbie Ko <robbieko@synology.com> Signed-off-by: Filipe Manana <fdmanana@suse.com>
2015-04-09 14:09:14 +01:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: incremental send, don't rename a directory too soon There's one more case where we can't issue a rename operation for a directory as soon as we process it. We used to delay directory renames only if they have some ancestor directory with a higher inode number that got renamed too, but there's another case where we need to delay the rename too - when a directory A is renamed to the old name of a directory B but that directory B has its rename delayed because it has now (in the send root) an ancestor with a higher inode number that was renamed. If we don't delay the directory rename in this case, the receiving end of the send stream will attempt to rename A to the old name of B before B got renamed to its new name, which results in a "directory not empty" error. So fix this by delaying directory renames for this case too. Steps to reproduce: $ mkfs.btrfs -f /dev/sdb $ mount /dev/sdb /mnt $ mkdir /mnt/a $ mkdir /mnt/b $ mkdir /mnt/c $ touch /mnt/a/file $ btrfs subvolume snapshot -r /mnt /mnt/snap1 $ mv /mnt/c /mnt/x $ mv /mnt/a /mnt/x/y $ mv /mnt/b /mnt/a $ btrfs subvolume snapshot -r /mnt /mnt/snap2 $ btrfs send /mnt/snap1 -f /tmp/1.send $ btrfs send -p /mnt/snap1 /mnt/snap2 -f /tmp/2.send $ mkfs.btrfs -f /dev/sdc $ mount /dev/sdc /mnt2 $ btrfs receive /mnt2 -f /tmp/1.send $ btrfs receive /mnt2 -f /tmp/2.send ERROR: rename b -> a failed. Directory not empty A test case for xfstests follows soon. Reported-by: Ames Cornish <ames@cornishes.net> Signed-off-by: Filipe Manana <fdmanana@suse.com> Signed-off-by: Chris Mason <clm@fb.com>
2015-02-28 22:29:22 +00:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: incremental send, don't rename a directory too soon There's one more case where we can't issue a rename operation for a directory as soon as we process it. We used to delay directory renames only if they have some ancestor directory with a higher inode number that got renamed too, but there's another case where we need to delay the rename too - when a directory A is renamed to the old name of a directory B but that directory B has its rename delayed because it has now (in the send root) an ancestor with a higher inode number that was renamed. If we don't delay the directory rename in this case, the receiving end of the send stream will attempt to rename A to the old name of B before B got renamed to its new name, which results in a "directory not empty" error. So fix this by delaying directory renames for this case too. Steps to reproduce: $ mkfs.btrfs -f /dev/sdb $ mount /dev/sdb /mnt $ mkdir /mnt/a $ mkdir /mnt/b $ mkdir /mnt/c $ touch /mnt/a/file $ btrfs subvolume snapshot -r /mnt /mnt/snap1 $ mv /mnt/c /mnt/x $ mv /mnt/a /mnt/x/y $ mv /mnt/b /mnt/a $ btrfs subvolume snapshot -r /mnt /mnt/snap2 $ btrfs send /mnt/snap1 -f /tmp/1.send $ btrfs send -p /mnt/snap1 /mnt/snap2 -f /tmp/2.send $ mkfs.btrfs -f /dev/sdc $ mount /dev/sdc /mnt2 $ btrfs receive /mnt2 -f /tmp/1.send $ btrfs receive /mnt2 -f /tmp/2.send ERROR: rename b -> a failed. Directory not empty A test case for xfstests follows soon. Reported-by: Ames Cornish <ames@cornishes.net> Signed-off-by: Filipe Manana <fdmanana@suse.com> Signed-off-by: Chris Mason <clm@fb.com>
2015-02-28 22:29:22 +00:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: incremental send, check if orphanized dir inode needs delayed rename If a directory inode is orphanized, because some inode previously processed has a new name that collides with the old name of the current inode, we need to check if it needs its rename operation delayed too, as its ancestor-descendent relationship with some other inode might have been reversed between the parent and send snapshots and therefore its rename operation needs to happen after that other inode is renamed. For example, for the following reproducer where this is needed (provided by Robbie Ko): $ mkfs.btrfs -f /dev/sdb $ mount /dev/sdb /mnt $ mkfs.btrfs -f /dev/sdc $ mount /dev/sdc /mnt2 $ mkdir -p /mnt/data/n1/n2 $ mkdir /mnt/data/n4 $ mkdir -p /mnt/data/t6/t7 $ mkdir /mnt/data/t5 $ mkdir /mnt/data/t7 $ mkdir /mnt/data/n4/t2 $ mkdir /mnt/data/t4 $ mkdir /mnt/data/t3 $ mv /mnt/data/t7 /mnt/data/n4/t2 $ mv /mnt/data/t4 /mnt/data/n4/t2/t7 $ mv /mnt/data/t5 /mnt/data/n4/t2/t7/t4 $ mv /mnt/data/t6 /mnt/data/n4/t2/t7/t4/t5 $ mv /mnt/data/n1/n2 /mnt/data/n4/t2/t7/t4/t5/t6 $ mv /mnt/data/n1 /mnt/data/n4/t2/t7/t4/t5/t6 $ mv /mnt/data/n4/t2/t7/t4/t5/t6/t7 /mnt/data/n4/t2/t7/t4/t5/t6/n2 $ mv /mnt/data/t3 /mnt/data/n4/t2/t7/t4/t5/t6/n2/t7 $ btrfs subvolume snapshot -r /mnt /mnt/snap1 $ mv /mnt/data/n4/t2/t7/t4/t5/t6/n1 /mnt/data/n4 $ mv /mnt/data/n4/t2 /mnt/data/n4/n1 $ mv /mnt/data/n4/n1/t2/t7/t4/t5/t6/n2 /mnt/data/n4/n1/t2 $ mv /mnt/data/n4/n1/t2/n2/t7/t3 /mnt/data/n4/n1/t2 $ mv /mnt/data/n4/n1/t2/t7/t4/t5/t6 /mnt/data/n4/n1/t2 $ mv /mnt/data/n4/n1/t2/t7/t4 /mnt/data/n4/n1/t2/t6 $ mv /mnt/data/n4/n1/t2/t7 /mnt/data/n4/n1/t2/t3 $ mv /mnt/data/n4/n1/t2/n2/t7 /mnt/data/n4/n1/t2 $ btrfs subvolume snapshot -r /mnt /mnt/snap2 $ btrfs send /mnt/snap1 | btrfs receive /mnt2 $ btrfs send -p /mnt/snap1 /mnt/snap2 | btrfs receive /mnt2 ERROR: send ioctl failed with -12: Cannot allocate memory Where the parent snapshot directory hierarchy is the following: . (ino 256) |-- data/ (ino 257) |-- n4/ (ino 260) |-- t2/ (ino 265) |-- t7/ (ino 264) |-- t4/ (ino 266) |-- t5/ (ino 263) |-- t6/ (ino 261) |-- n1/ (ino 258) |-- n2/ (ino 259) |-- t7/ (ino 262) |-- t3/ (ino 267) And the send snapshot's directory hierarchy is the following: . (ino 256) |-- data/ (ino 257) |-- n4/ (ino 260) |-- n1/ (ino 258) |-- t2/ (ino 265) |-- n2/ (ino 259) |-- t3/ (ino 267) | |-- t7 (ino 264) | |-- t6/ (ino 261) | |-- t4/ (ino 266) | |-- t5/ (ino 263) | |-- t7/ (ino 262) While processing inode 262 we orphanize inode 264 and later attempt to rename inode 264 to its new name/location, which resulted in building an incorrect destination path string for the rename operation with the value "data/n4/t2/t7/t4/t5/t6/n2/t7/t3/t7". This rename operation must have been done only after inode 267 is processed and renamed, as the ancestor-descendent relationship between inodes 264 and 267 was reversed between both snapshots, because otherwise it results in an infinite loop when building the path string for inode 264 when we are processing an inode with a number larger than 264. That loop is the following: start inode 264, send progress of 265 for example parent of 264 -> 267 parent of 267 -> 262 parent of 262 -> 259 parent of 259 -> 261 parent of 261 -> 263 parent of 263 -> 266 parent of 266 -> 264 |--> back to first iteration while current path string length is <= PATH_MAX, and fail with -ENOMEM otherwise So fix this by making the check if we need to delay a directory rename regardless of the current inode having been orphanized or not. A test case for fstests follows soon. Thanks to Robbie Ko for providing a reproducer for this problem. Reported-by: Robbie Ko <robbieko@synology.com> Signed-off-by: Filipe Manana <fdmanana@suse.com>
2015-04-09 14:09:14 +01:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: fix send issues related to inode number reuse If you are sending a snapshot and specifying a parent snapshot we will walk the trees and figure out where they differ and send the differences only. The way we check for differences are if the leaves aren't the same and if the keys are not the same within the leaves. So if neither leaf is the same (ie the leaf has been cow'ed from the parent snapshot) we walk each item in the send root and check it against the parent root. If the items match exactly then we don't do anything. This doesn't quite work for inode refs, since they will just have the name and the parent objectid. If you move the file from a directory and then remove that directory and re-create a directory with the same inode number as the old directory and then move that file back into that directory we will assume that nothing changed and you will get errors when you try to receive. In order to fix this we need to do extra checking to see if the inode ref really is the same or not. So do this by passing down BTRFS_COMPARE_TREE_SAME if the items match. Then if the key type is an inode ref we can do some extra checking, otherwise we just keep processing. The extra checking is to look up the generation of the directory in the parent volume and compare it to the generation of the send volume. If they match then they are the same directory and we are good to go. If they don't we have to add them to the changed refs list. This means we have to track the generation of the ref we're trying to lookup when we iterate all the refs for a particular inode. So in the case of looking for new refs we have to get the generation from the parent volume, and in the case of looking for deleted refs we have to get the generation from the send volume to compare with. There was also the issue of using a ulist to keep track of the directories we needed to check. Because we can get a deleted ref and a new ref for the same inode number the ulist won't work since it indexes based on the value. So instead just dup any directory ref we find and add it to a local list, and then process that list as normal and do away with using a ulist for this altogether. Before we would fail all of the tests in the far-progs that related to moving directories (test group 32). With this patch we now pass these tests, and all of the tests in the far-progs send testing suite. Thanks, Signed-off-by: Josef Bacik <jbacik@fusionio.com> Signed-off-by: Chris Mason <chris.mason@fusionio.com>
2013-08-16 16:52:55 -04:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: fix send attempting to rmdir non-empty directories The incremental send algorithm assumed that it was possible to issue a directory remove (rmdir) if the the inode number it was currently processing was greater than (or equal) to any inode that referenced the directory's inode. This wasn't a valid assumption because any such inode might be a child directory that is pending a move/rename operation, because it was moved into a directory that has a higher inode number and was moved/renamed too - in other words, the case the following commit addressed: 9f03740a956d7ac6a1b8f8c455da6fa5cae11c22 (Btrfs: fix infinite path build loops in incremental send) This made an incremental send issue an rmdir operation before the target directory was actually empty, which made btrfs receive fail. Therefore it needs to wait for all pending child directory inodes to be moved/renamed before sending an rmdir operation. Simple steps to reproduce this issue: $ mkfs.btrfs -f /dev/sdb3 $ mount /dev/sdb3 /mnt/btrfs $ mkdir -p /mnt/btrfs/a/b/c/x $ mkdir /mnt/btrfs/a/b/y $ btrfs subvolume snapshot -r /mnt/btrfs /mnt/btrfs/snap1 $ btrfs send /mnt/btrfs/snap1 -f /tmp/base.send $ mv /mnt/btrfs/a/b/y /mnt/btrfs/a/b/YY $ mv /mnt/btrfs/a/b/c/x /mnt/btrfs/a/b/YY $ rmdir /mnt/btrfs/a/b/c $ btrfs subvolume snapshot -r /mnt/btrfs /mnt/btrfs/snap2 $ btrfs send -p /mnt/btrfs/snap1 /mnt/btrfs/snap2 -f /tmp/incremental.send $ umount /mnt/btrfs $ mkfs.btrfs -f /dev/sdb3 $ mount /dev/sdb3 /mnt/btrfs $ btrfs receive /mnt/btrfs -f /tmp/base.send $ btrfs receive /mnt/btrfs -f /tmp/incremental.send The second btrfs receive command failed with: ERROR: rmdir o259-6-0 failed. Directory not empty A test case for xfstests follows. Signed-off-by: Filipe David Borba Manana <fdmanana@gmail.com> Signed-off-by: Josef Bacik <jbacik@fb.com>
2014-02-19 14:31:44 +00:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: fix send issues related to inode number reuse If you are sending a snapshot and specifying a parent snapshot we will walk the trees and figure out where they differ and send the differences only. The way we check for differences are if the leaves aren't the same and if the keys are not the same within the leaves. So if neither leaf is the same (ie the leaf has been cow'ed from the parent snapshot) we walk each item in the send root and check it against the parent root. If the items match exactly then we don't do anything. This doesn't quite work for inode refs, since they will just have the name and the parent objectid. If you move the file from a directory and then remove that directory and re-create a directory with the same inode number as the old directory and then move that file back into that directory we will assume that nothing changed and you will get errors when you try to receive. In order to fix this we need to do extra checking to see if the inode ref really is the same or not. So do this by passing down BTRFS_COMPARE_TREE_SAME if the items match. Then if the key type is an inode ref we can do some extra checking, otherwise we just keep processing. The extra checking is to look up the generation of the directory in the parent volume and compare it to the generation of the send volume. If they match then they are the same directory and we are good to go. If they don't we have to add them to the changed refs list. This means we have to track the generation of the ref we're trying to lookup when we iterate all the refs for a particular inode. So in the case of looking for new refs we have to get the generation from the parent volume, and in the case of looking for deleted refs we have to get the generation from the send volume to compare with. There was also the issue of using a ulist to keep track of the directories we needed to check. Because we can get a deleted ref and a new ref for the same inode number the ulist won't work since it indexes based on the value. So instead just dup any directory ref we find and add it to a local list, and then process that list as normal and do away with using a ulist for this altogether. Before we would fail all of the tests in the far-progs that related to moving directories (test group 32). With this patch we now pass these tests, and all of the tests in the far-progs send testing suite. Thanks, Signed-off-by: Josef Bacik <jbacik@fusionio.com> Signed-off-by: Chris Mason <chris.mason@fusionio.com>
2013-08-16 16:52:55 -04:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: add correct parent to check_dirs when dir got moved We only added the parent for the new position of a moved dir. We also need to add the old parent of the moved dir. Reported-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com> Signed-off-by: Alexander Block <ablock84@googlemail.com>
2012-07-28 11:46:29 +02:00
Btrfs: fix send issues related to inode number reuse If you are sending a snapshot and specifying a parent snapshot we will walk the trees and figure out where they differ and send the differences only. The way we check for differences are if the leaves aren't the same and if the keys are not the same within the leaves. So if neither leaf is the same (ie the leaf has been cow'ed from the parent snapshot) we walk each item in the send root and check it against the parent root. If the items match exactly then we don't do anything. This doesn't quite work for inode refs, since they will just have the name and the parent objectid. If you move the file from a directory and then remove that directory and re-create a directory with the same inode number as the old directory and then move that file back into that directory we will assume that nothing changed and you will get errors when you try to receive. In order to fix this we need to do extra checking to see if the inode ref really is the same or not. So do this by passing down BTRFS_COMPARE_TREE_SAME if the items match. Then if the key type is an inode ref we can do some extra checking, otherwise we just keep processing. The extra checking is to look up the generation of the directory in the parent volume and compare it to the generation of the send volume. If they match then they are the same directory and we are good to go. If they don't we have to add them to the changed refs list. This means we have to track the generation of the ref we're trying to lookup when we iterate all the refs for a particular inode. So in the case of looking for new refs we have to get the generation from the parent volume, and in the case of looking for deleted refs we have to get the generation from the send volume to compare with. There was also the issue of using a ulist to keep track of the directories we needed to check. Because we can get a deleted ref and a new ref for the same inode number the ulist won't work since it indexes based on the value. So instead just dup any directory ref we find and add it to a local list, and then process that list as normal and do away with using a ulist for this altogether. Before we would fail all of the tests in the far-progs that related to moving directories (test group 32). With this patch we now pass these tests, and all of the tests in the far-progs send testing suite. Thanks, Signed-off-by: Josef Bacik <jbacik@fusionio.com> Signed-off-by: Chris Mason <chris.mason@fusionio.com>
2013-08-16 16:52:55 -04:00
Btrfs: add correct parent to check_dirs when dir got moved We only added the parent for the new position of a moved dir. We also need to add the old parent of the moved dir. Reported-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com> Signed-off-by: Alexander Block <ablock84@googlemail.com>
2012-07-28 11:46:29 +02:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: fix cur_ino < parent_ino case for send/receive When the current inodes inum is smaller then the inum of the parent directory strange things were happending due to wrong path resolution and other bugs. Fix this with a new approach for the problem. Reported-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com> Signed-off-by: Alexander Block <ablock84@googlemail.com>
2012-07-28 10:42:24 +02:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: fix send issues related to inode number reuse If you are sending a snapshot and specifying a parent snapshot we will walk the trees and figure out where they differ and send the differences only. The way we check for differences are if the leaves aren't the same and if the keys are not the same within the leaves. So if neither leaf is the same (ie the leaf has been cow'ed from the parent snapshot) we walk each item in the send root and check it against the parent root. If the items match exactly then we don't do anything. This doesn't quite work for inode refs, since they will just have the name and the parent objectid. If you move the file from a directory and then remove that directory and re-create a directory with the same inode number as the old directory and then move that file back into that directory we will assume that nothing changed and you will get errors when you try to receive. In order to fix this we need to do extra checking to see if the inode ref really is the same or not. So do this by passing down BTRFS_COMPARE_TREE_SAME if the items match. Then if the key type is an inode ref we can do some extra checking, otherwise we just keep processing. The extra checking is to look up the generation of the directory in the parent volume and compare it to the generation of the send volume. If they match then they are the same directory and we are good to go. If they don't we have to add them to the changed refs list. This means we have to track the generation of the ref we're trying to lookup when we iterate all the refs for a particular inode. So in the case of looking for new refs we have to get the generation from the parent volume, and in the case of looking for deleted refs we have to get the generation from the send volume to compare with. There was also the issue of using a ulist to keep track of the directories we needed to check. Because we can get a deleted ref and a new ref for the same inode number the ulist won't work since it indexes based on the value. So instead just dup any directory ref we find and add it to a local list, and then process that list as normal and do away with using a ulist for this altogether. Before we would fail all of the tests in the far-progs that related to moving directories (test group 32). With this patch we now pass these tests, and all of the tests in the far-progs send testing suite. Thanks, Signed-off-by: Josef Bacik <jbacik@fusionio.com> Signed-off-by: Chris Mason <chris.mason@fusionio.com>
2013-08-16 16:52:55 -04:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: add/fix comments/documentation for send/receive As the subject already said, add/fix comments. Signed-off-by: Alexander Block <ablock84@googlemail.com>
2012-07-28 14:11:31 +02:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: fix cur_ino < parent_ino case for send/receive When the current inodes inum is smaller then the inum of the parent directory strange things were happending due to wrong path resolution and other bugs. Fix this with a new approach for the problem. Reported-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com> Signed-off-by: Alexander Block <ablock84@googlemail.com>
2012-07-28 10:42:24 +02:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: fix send issues related to inode number reuse If you are sending a snapshot and specifying a parent snapshot we will walk the trees and figure out where they differ and send the differences only. The way we check for differences are if the leaves aren't the same and if the keys are not the same within the leaves. So if neither leaf is the same (ie the leaf has been cow'ed from the parent snapshot) we walk each item in the send root and check it against the parent root. If the items match exactly then we don't do anything. This doesn't quite work for inode refs, since they will just have the name and the parent objectid. If you move the file from a directory and then remove that directory and re-create a directory with the same inode number as the old directory and then move that file back into that directory we will assume that nothing changed and you will get errors when you try to receive. In order to fix this we need to do extra checking to see if the inode ref really is the same or not. So do this by passing down BTRFS_COMPARE_TREE_SAME if the items match. Then if the key type is an inode ref we can do some extra checking, otherwise we just keep processing. The extra checking is to look up the generation of the directory in the parent volume and compare it to the generation of the send volume. If they match then they are the same directory and we are good to go. If they don't we have to add them to the changed refs list. This means we have to track the generation of the ref we're trying to lookup when we iterate all the refs for a particular inode. So in the case of looking for new refs we have to get the generation from the parent volume, and in the case of looking for deleted refs we have to get the generation from the send volume to compare with. There was also the issue of using a ulist to keep track of the directories we needed to check. Because we can get a deleted ref and a new ref for the same inode number the ulist won't work since it indexes based on the value. So instead just dup any directory ref we find and add it to a local list, and then process that list as normal and do away with using a ulist for this altogether. Before we would fail all of the tests in the far-progs that related to moving directories (test group 32). With this patch we now pass these tests, and all of the tests in the far-progs send testing suite. Thanks, Signed-off-by: Josef Bacik <jbacik@fusionio.com> Signed-off-by: Chris Mason <chris.mason@fusionio.com>
2013-08-16 16:52:55 -04:00
Btrfs: add/fix comments/documentation for send/receive As the subject already said, add/fix comments. Signed-off-by: Alexander Block <ablock84@googlemail.com>
2012-07-28 14:11:31 +02:00
Btrfs: fix send issues related to inode number reuse If you are sending a snapshot and specifying a parent snapshot we will walk the trees and figure out where they differ and send the differences only. The way we check for differences are if the leaves aren't the same and if the keys are not the same within the leaves. So if neither leaf is the same (ie the leaf has been cow'ed from the parent snapshot) we walk each item in the send root and check it against the parent root. If the items match exactly then we don't do anything. This doesn't quite work for inode refs, since they will just have the name and the parent objectid. If you move the file from a directory and then remove that directory and re-create a directory with the same inode number as the old directory and then move that file back into that directory we will assume that nothing changed and you will get errors when you try to receive. In order to fix this we need to do extra checking to see if the inode ref really is the same or not. So do this by passing down BTRFS_COMPARE_TREE_SAME if the items match. Then if the key type is an inode ref we can do some extra checking, otherwise we just keep processing. The extra checking is to look up the generation of the directory in the parent volume and compare it to the generation of the send volume. If they match then they are the same directory and we are good to go. If they don't we have to add them to the changed refs list. This means we have to track the generation of the ref we're trying to lookup when we iterate all the refs for a particular inode. So in the case of looking for new refs we have to get the generation from the parent volume, and in the case of looking for deleted refs we have to get the generation from the send volume to compare with. There was also the issue of using a ulist to keep track of the directories we needed to check. Because we can get a deleted ref and a new ref for the same inode number the ulist won't work since it indexes based on the value. So instead just dup any directory ref we find and add it to a local list, and then process that list as normal and do away with using a ulist for this altogether. Before we would fail all of the tests in the far-progs that related to moving directories (test group 32). With this patch we now pass these tests, and all of the tests in the far-progs send testing suite. Thanks, Signed-off-by: Josef Bacik <jbacik@fusionio.com> Signed-off-by: Chris Mason <chris.mason@fusionio.com>
2013-08-16 16:52:55 -04:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: fix send issues related to inode number reuse If you are sending a snapshot and specifying a parent snapshot we will walk the trees and figure out where they differ and send the differences only. The way we check for differences are if the leaves aren't the same and if the keys are not the same within the leaves. So if neither leaf is the same (ie the leaf has been cow'ed from the parent snapshot) we walk each item in the send root and check it against the parent root. If the items match exactly then we don't do anything. This doesn't quite work for inode refs, since they will just have the name and the parent objectid. If you move the file from a directory and then remove that directory and re-create a directory with the same inode number as the old directory and then move that file back into that directory we will assume that nothing changed and you will get errors when you try to receive. In order to fix this we need to do extra checking to see if the inode ref really is the same or not. So do this by passing down BTRFS_COMPARE_TREE_SAME if the items match. Then if the key type is an inode ref we can do some extra checking, otherwise we just keep processing. The extra checking is to look up the generation of the directory in the parent volume and compare it to the generation of the send volume. If they match then they are the same directory and we are good to go. If they don't we have to add them to the changed refs list. This means we have to track the generation of the ref we're trying to lookup when we iterate all the refs for a particular inode. So in the case of looking for new refs we have to get the generation from the parent volume, and in the case of looking for deleted refs we have to get the generation from the send volume to compare with. There was also the issue of using a ulist to keep track of the directories we needed to check. Because we can get a deleted ref and a new ref for the same inode number the ulist won't work since it indexes based on the value. So instead just dup any directory ref we find and add it to a local list, and then process that list as normal and do away with using a ulist for this altogether. Before we would fail all of the tests in the far-progs that related to moving directories (test group 32). With this patch we now pass these tests, and all of the tests in the far-progs send testing suite. Thanks, Signed-off-by: Josef Bacik <jbacik@fusionio.com> Signed-off-by: Chris Mason <chris.mason@fusionio.com>
2013-08-16 16:52:55 -04:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: fix send issues related to inode number reuse If you are sending a snapshot and specifying a parent snapshot we will walk the trees and figure out where they differ and send the differences only. The way we check for differences are if the leaves aren't the same and if the keys are not the same within the leaves. So if neither leaf is the same (ie the leaf has been cow'ed from the parent snapshot) we walk each item in the send root and check it against the parent root. If the items match exactly then we don't do anything. This doesn't quite work for inode refs, since they will just have the name and the parent objectid. If you move the file from a directory and then remove that directory and re-create a directory with the same inode number as the old directory and then move that file back into that directory we will assume that nothing changed and you will get errors when you try to receive. In order to fix this we need to do extra checking to see if the inode ref really is the same or not. So do this by passing down BTRFS_COMPARE_TREE_SAME if the items match. Then if the key type is an inode ref we can do some extra checking, otherwise we just keep processing. The extra checking is to look up the generation of the directory in the parent volume and compare it to the generation of the send volume. If they match then they are the same directory and we are good to go. If they don't we have to add them to the changed refs list. This means we have to track the generation of the ref we're trying to lookup when we iterate all the refs for a particular inode. So in the case of looking for new refs we have to get the generation from the parent volume, and in the case of looking for deleted refs we have to get the generation from the send volume to compare with. There was also the issue of using a ulist to keep track of the directories we needed to check. Because we can get a deleted ref and a new ref for the same inode number the ulist won't work since it indexes based on the value. So instead just dup any directory ref we find and add it to a local list, and then process that list as normal and do away with using a ulist for this altogether. Before we would fail all of the tests in the far-progs that related to moving directories (test group 32). With this patch we now pass these tests, and all of the tests in the far-progs send testing suite. Thanks, Signed-off-by: Josef Bacik <jbacik@fusionio.com> Signed-off-by: Chris Mason <chris.mason@fusionio.com>
2013-08-16 16:52:55 -04:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: send, don't send rmdir for same target multiple times When doing an incremental send, if we delete a directory that has N > 1 hardlinks for the same file and that file has the highest inode number inside the directory contents, an incremental send would send N times an rmdir operation against the directory. This made the btrfs receive command fail on the second rmdir instruction, as the target directory didn't exist anymore. Steps to reproduce the issue: $ mkfs.btrfs -f /dev/sdb3 $ mount /dev/sdb3 /mnt/btrfs $ mkdir -p /mnt/btrfs/a/b/c $ echo 'ola mundo' > /mnt/btrfs/a/b/c/foo.txt $ ln /mnt/btrfs/a/b/c/foo.txt /mnt/btrfs/a/b/c/bar.txt $ btrfs subvolume snapshot -r /mnt/btrfs /mnt/btrfs/snap1 $ btrfs send /mnt/btrfs/snap1 -f /tmp/base.send $ rm -f /mnt/btrfs/a/b/c/foo.txt $ rm -f /mnt/btrfs/a/b/c/bar.txt $ rmdir /mnt/btrfs/a/b/c $ btrfs subvolume snapshot -r /mnt/btrfs /mnt/btrfs/snap2 $ btrfs send -p /mnt/btrfs/snap1 /mnt/btrfs/snap2 -f /tmp/incremental.send $ umount /mnt/btrfs $ mkfs.btrfs -f /dev/sdb3 $ mount /dev/sdb3 /mnt/btrfs $ btrfs receive /mnt/btrfs -f /tmp/base.send $ btrfs receive /mnt/btrfs -f /tmp/incremental.send The second btrfs receive command failed with: ERROR: rmdir o259-6-0 failed. No such file or directory A test case for xfstests follows. Signed-off-by: Filipe David Borba Manana <fdmanana@gmail.com> Signed-off-by: Josef Bacik <jbacik@fb.com>
2014-02-16 21:01:39 +00:00
Btrfs: fix send attempting to rmdir non-empty directories The incremental send algorithm assumed that it was possible to issue a directory remove (rmdir) if the the inode number it was currently processing was greater than (or equal) to any inode that referenced the directory's inode. This wasn't a valid assumption because any such inode might be a child directory that is pending a move/rename operation, because it was moved into a directory that has a higher inode number and was moved/renamed too - in other words, the case the following commit addressed: 9f03740a956d7ac6a1b8f8c455da6fa5cae11c22 (Btrfs: fix infinite path build loops in incremental send) This made an incremental send issue an rmdir operation before the target directory was actually empty, which made btrfs receive fail. Therefore it needs to wait for all pending child directory inodes to be moved/renamed before sending an rmdir operation. Simple steps to reproduce this issue: $ mkfs.btrfs -f /dev/sdb3 $ mount /dev/sdb3 /mnt/btrfs $ mkdir -p /mnt/btrfs/a/b/c/x $ mkdir /mnt/btrfs/a/b/y $ btrfs subvolume snapshot -r /mnt/btrfs /mnt/btrfs/snap1 $ btrfs send /mnt/btrfs/snap1 -f /tmp/base.send $ mv /mnt/btrfs/a/b/y /mnt/btrfs/a/b/YY $ mv /mnt/btrfs/a/b/c/x /mnt/btrfs/a/b/YY $ rmdir /mnt/btrfs/a/b/c $ btrfs subvolume snapshot -r /mnt/btrfs /mnt/btrfs/snap2 $ btrfs send -p /mnt/btrfs/snap1 /mnt/btrfs/snap2 -f /tmp/incremental.send $ umount /mnt/btrfs $ mkfs.btrfs -f /dev/sdb3 $ mount /dev/sdb3 /mnt/btrfs $ btrfs receive /mnt/btrfs -f /tmp/base.send $ btrfs receive /mnt/btrfs -f /tmp/incremental.send The second btrfs receive command failed with: ERROR: rmdir o259-6-0 failed. Directory not empty A test case for xfstests follows. Signed-off-by: Filipe David Borba Manana <fdmanana@gmail.com> Signed-off-by: Josef Bacik <jbacik@fb.com>
2014-02-19 14:31:44 +00:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: fix send issues related to inode number reuse If you are sending a snapshot and specifying a parent snapshot we will walk the trees and figure out where they differ and send the differences only. The way we check for differences are if the leaves aren't the same and if the keys are not the same within the leaves. So if neither leaf is the same (ie the leaf has been cow'ed from the parent snapshot) we walk each item in the send root and check it against the parent root. If the items match exactly then we don't do anything. This doesn't quite work for inode refs, since they will just have the name and the parent objectid. If you move the file from a directory and then remove that directory and re-create a directory with the same inode number as the old directory and then move that file back into that directory we will assume that nothing changed and you will get errors when you try to receive. In order to fix this we need to do extra checking to see if the inode ref really is the same or not. So do this by passing down BTRFS_COMPARE_TREE_SAME if the items match. Then if the key type is an inode ref we can do some extra checking, otherwise we just keep processing. The extra checking is to look up the generation of the directory in the parent volume and compare it to the generation of the send volume. If they match then they are the same directory and we are good to go. If they don't we have to add them to the changed refs list. This means we have to track the generation of the ref we're trying to lookup when we iterate all the refs for a particular inode. So in the case of looking for new refs we have to get the generation from the parent volume, and in the case of looking for deleted refs we have to get the generation from the send volume to compare with. There was also the issue of using a ulist to keep track of the directories we needed to check. Because we can get a deleted ref and a new ref for the same inode number the ulist won't work since it indexes based on the value. So instead just dup any directory ref we find and add it to a local list, and then process that list as normal and do away with using a ulist for this altogether. Before we would fail all of the tests in the far-progs that related to moving directories (test group 32). With this patch we now pass these tests, and all of the tests in the far-progs send testing suite. Thanks, Signed-off-by: Josef Bacik <jbacik@fusionio.com> Signed-off-by: Chris Mason <chris.mason@fusionio.com>
2013-08-16 16:52:55 -04:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: send, don't send rmdir for same target multiple times When doing an incremental send, if we delete a directory that has N > 1 hardlinks for the same file and that file has the highest inode number inside the directory contents, an incremental send would send N times an rmdir operation against the directory. This made the btrfs receive command fail on the second rmdir instruction, as the target directory didn't exist anymore. Steps to reproduce the issue: $ mkfs.btrfs -f /dev/sdb3 $ mount /dev/sdb3 /mnt/btrfs $ mkdir -p /mnt/btrfs/a/b/c $ echo 'ola mundo' > /mnt/btrfs/a/b/c/foo.txt $ ln /mnt/btrfs/a/b/c/foo.txt /mnt/btrfs/a/b/c/bar.txt $ btrfs subvolume snapshot -r /mnt/btrfs /mnt/btrfs/snap1 $ btrfs send /mnt/btrfs/snap1 -f /tmp/base.send $ rm -f /mnt/btrfs/a/b/c/foo.txt $ rm -f /mnt/btrfs/a/b/c/bar.txt $ rmdir /mnt/btrfs/a/b/c $ btrfs subvolume snapshot -r /mnt/btrfs /mnt/btrfs/snap2 $ btrfs send -p /mnt/btrfs/snap1 /mnt/btrfs/snap2 -f /tmp/incremental.send $ umount /mnt/btrfs $ mkfs.btrfs -f /dev/sdb3 $ mount /dev/sdb3 /mnt/btrfs $ btrfs receive /mnt/btrfs -f /tmp/base.send $ btrfs receive /mnt/btrfs -f /tmp/incremental.send The second btrfs receive command failed with: ERROR: rmdir o259-6-0 failed. No such file or directory A test case for xfstests follows. Signed-off-by: Filipe David Borba Manana <fdmanana@gmail.com> Signed-off-by: Josef Bacik <jbacik@fb.com>
2014-02-16 21:01:39 +00:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: fix send issues related to inode number reuse If you are sending a snapshot and specifying a parent snapshot we will walk the trees and figure out where they differ and send the differences only. The way we check for differences are if the leaves aren't the same and if the keys are not the same within the leaves. So if neither leaf is the same (ie the leaf has been cow'ed from the parent snapshot) we walk each item in the send root and check it against the parent root. If the items match exactly then we don't do anything. This doesn't quite work for inode refs, since they will just have the name and the parent objectid. If you move the file from a directory and then remove that directory and re-create a directory with the same inode number as the old directory and then move that file back into that directory we will assume that nothing changed and you will get errors when you try to receive. In order to fix this we need to do extra checking to see if the inode ref really is the same or not. So do this by passing down BTRFS_COMPARE_TREE_SAME if the items match. Then if the key type is an inode ref we can do some extra checking, otherwise we just keep processing. The extra checking is to look up the generation of the directory in the parent volume and compare it to the generation of the send volume. If they match then they are the same directory and we are good to go. If they don't we have to add them to the changed refs list. This means we have to track the generation of the ref we're trying to lookup when we iterate all the refs for a particular inode. So in the case of looking for new refs we have to get the generation from the parent volume, and in the case of looking for deleted refs we have to get the generation from the send volume to compare with. There was also the issue of using a ulist to keep track of the directories we needed to check. Because we can get a deleted ref and a new ref for the same inode number the ulist won't work since it indexes based on the value. So instead just dup any directory ref we find and add it to a local list, and then process that list as normal and do away with using a ulist for this altogether. Before we would fail all of the tests in the far-progs that related to moving directories (test group 32). With this patch we now pass these tests, and all of the tests in the far-progs send testing suite. Thanks, Signed-off-by: Josef Bacik <jbacik@fusionio.com> Signed-off-by: Chris Mason <chris.mason@fusionio.com>
2013-08-16 16:52:55 -04:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: cleanup unused arguments in send.c sctx is removed from the argument of the function that doesn't use sctx. Signed-off-by: Tsutomu Itoh <t-itoh@jp.fujitsu.com> Signed-off-by: Josef Bacik <jbacik@fusionio.com>
2013-05-08 07:51:52 +00:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: share the same code for __record_{new,deleted}_ref This has no functional change, only picks out the same part of two functions, and makes it shared. Signed-off-by: Liu Bo <bo.li.liu@oracle.com> Signed-off-by: Josef Bacik <jbacik@fb.com>
2014-03-03 21:31:03 +08:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: cleanup unused arguments in send.c sctx is removed from the argument of the function that doesn't use sctx. Signed-off-by: Tsutomu Itoh <t-itoh@jp.fujitsu.com> Signed-off-by: Josef Bacik <jbacik@fusionio.com>
2013-05-08 07:51:52 +00:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: share the same code for __record_{new,deleted}_ref This has no functional change, only picks out the same part of two functions, and makes it shared. Signed-off-by: Liu Bo <bo.li.liu@oracle.com> Signed-off-by: Josef Bacik <jbacik@fb.com>
2014-03-03 21:31:03 +08:00
Btrfs: add rdev to get_inode_info in send/receive We need rdev in the next commit. Signed-off-by: Alexander Block <ablock84@googlemail.com>
2012-07-26 23:39:10 +02:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: share the same code for __record_{new,deleted}_ref This has no functional change, only picks out the same part of two functions, and makes it shared. Signed-off-by: Liu Bo <bo.li.liu@oracle.com> Signed-off-by: Josef Bacik <jbacik@fb.com>
2014-03-03 21:31:03 +08:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: cleanup unused arguments in send.c sctx is removed from the argument of the function that doesn't use sctx. Signed-off-by: Tsutomu Itoh <t-itoh@jp.fujitsu.com> Signed-off-by: Josef Bacik <jbacik@fusionio.com>
2013-05-08 07:51:52 +00:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: share the same code for __record_{new,deleted}_ref This has no functional change, only picks out the same part of two functions, and makes it shared. Signed-off-by: Liu Bo <bo.li.liu@oracle.com> Signed-off-by: Josef Bacik <jbacik@fb.com>
2014-03-03 21:31:03 +08:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: share the same code for __record_{new,deleted}_ref This has no functional change, only picks out the same part of two functions, and makes it shared. Signed-off-by: Liu Bo <bo.li.liu@oracle.com> Signed-off-by: Josef Bacik <jbacik@fb.com>
2014-03-03 21:31:03 +08:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: cleanup unused arguments in send.c sctx is removed from the argument of the function that doesn't use sctx. Signed-off-by: Tsutomu Itoh <t-itoh@jp.fujitsu.com> Signed-off-by: Josef Bacik <jbacik@fusionio.com>
2013-05-08 07:51:52 +00:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: cleanup unused arguments in send.c sctx is removed from the argument of the function that doesn't use sctx. Signed-off-by: Tsutomu Itoh <t-itoh@jp.fujitsu.com> Signed-off-by: Josef Bacik <jbacik@fusionio.com>
2013-05-08 07:51:52 +00:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: fix send issues related to inode number reuse If you are sending a snapshot and specifying a parent snapshot we will walk the trees and figure out where they differ and send the differences only. The way we check for differences are if the leaves aren't the same and if the keys are not the same within the leaves. So if neither leaf is the same (ie the leaf has been cow'ed from the parent snapshot) we walk each item in the send root and check it against the parent root. If the items match exactly then we don't do anything. This doesn't quite work for inode refs, since they will just have the name and the parent objectid. If you move the file from a directory and then remove that directory and re-create a directory with the same inode number as the old directory and then move that file back into that directory we will assume that nothing changed and you will get errors when you try to receive. In order to fix this we need to do extra checking to see if the inode ref really is the same or not. So do this by passing down BTRFS_COMPARE_TREE_SAME if the items match. Then if the key type is an inode ref we can do some extra checking, otherwise we just keep processing. The extra checking is to look up the generation of the directory in the parent volume and compare it to the generation of the send volume. If they match then they are the same directory and we are good to go. If they don't we have to add them to the changed refs list. This means we have to track the generation of the ref we're trying to lookup when we iterate all the refs for a particular inode. So in the case of looking for new refs we have to get the generation from the parent volume, and in the case of looking for deleted refs we have to get the generation from the send volume to compare with. There was also the issue of using a ulist to keep track of the directories we needed to check. Because we can get a deleted ref and a new ref for the same inode number the ulist won't work since it indexes based on the value. So instead just dup any directory ref we find and add it to a local list, and then process that list as normal and do away with using a ulist for this altogether. Before we would fail all of the tests in the far-progs that related to moving directories (test group 32). With this patch we now pass these tests, and all of the tests in the far-progs send testing suite. Thanks, Signed-off-by: Josef Bacik <jbacik@fusionio.com> Signed-off-by: Chris Mason <chris.mason@fusionio.com>
2013-08-16 16:52:55 -04:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: fix send issues related to inode number reuse If you are sending a snapshot and specifying a parent snapshot we will walk the trees and figure out where they differ and send the differences only. The way we check for differences are if the leaves aren't the same and if the keys are not the same within the leaves. So if neither leaf is the same (ie the leaf has been cow'ed from the parent snapshot) we walk each item in the send root and check it against the parent root. If the items match exactly then we don't do anything. This doesn't quite work for inode refs, since they will just have the name and the parent objectid. If you move the file from a directory and then remove that directory and re-create a directory with the same inode number as the old directory and then move that file back into that directory we will assume that nothing changed and you will get errors when you try to receive. In order to fix this we need to do extra checking to see if the inode ref really is the same or not. So do this by passing down BTRFS_COMPARE_TREE_SAME if the items match. Then if the key type is an inode ref we can do some extra checking, otherwise we just keep processing. The extra checking is to look up the generation of the directory in the parent volume and compare it to the generation of the send volume. If they match then they are the same directory and we are good to go. If they don't we have to add them to the changed refs list. This means we have to track the generation of the ref we're trying to lookup when we iterate all the refs for a particular inode. So in the case of looking for new refs we have to get the generation from the parent volume, and in the case of looking for deleted refs we have to get the generation from the send volume to compare with. There was also the issue of using a ulist to keep track of the directories we needed to check. Because we can get a deleted ref and a new ref for the same inode number the ulist won't work since it indexes based on the value. So instead just dup any directory ref we find and add it to a local list, and then process that list as normal and do away with using a ulist for this altogether. Before we would fail all of the tests in the far-progs that related to moving directories (test group 32). With this patch we now pass these tests, and all of the tests in the far-progs send testing suite. Thanks, Signed-off-by: Josef Bacik <jbacik@fusionio.com> Signed-off-by: Chris Mason <chris.mason@fusionio.com>
2013-08-16 16:52:55 -04:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: fix send issues related to inode number reuse If you are sending a snapshot and specifying a parent snapshot we will walk the trees and figure out where they differ and send the differences only. The way we check for differences are if the leaves aren't the same and if the keys are not the same within the leaves. So if neither leaf is the same (ie the leaf has been cow'ed from the parent snapshot) we walk each item in the send root and check it against the parent root. If the items match exactly then we don't do anything. This doesn't quite work for inode refs, since they will just have the name and the parent objectid. If you move the file from a directory and then remove that directory and re-create a directory with the same inode number as the old directory and then move that file back into that directory we will assume that nothing changed and you will get errors when you try to receive. In order to fix this we need to do extra checking to see if the inode ref really is the same or not. So do this by passing down BTRFS_COMPARE_TREE_SAME if the items match. Then if the key type is an inode ref we can do some extra checking, otherwise we just keep processing. The extra checking is to look up the generation of the directory in the parent volume and compare it to the generation of the send volume. If they match then they are the same directory and we are good to go. If they don't we have to add them to the changed refs list. This means we have to track the generation of the ref we're trying to lookup when we iterate all the refs for a particular inode. So in the case of looking for new refs we have to get the generation from the parent volume, and in the case of looking for deleted refs we have to get the generation from the send volume to compare with. There was also the issue of using a ulist to keep track of the directories we needed to check. Because we can get a deleted ref and a new ref for the same inode number the ulist won't work since it indexes based on the value. So instead just dup any directory ref we find and add it to a local list, and then process that list as normal and do away with using a ulist for this altogether. Before we would fail all of the tests in the far-progs that related to moving directories (test group 32). With this patch we now pass these tests, and all of the tests in the far-progs send testing suite. Thanks, Signed-off-by: Josef Bacik <jbacik@fusionio.com> Signed-off-by: Chris Mason <chris.mason@fusionio.com>
2013-08-16 16:52:55 -04:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: cleanup unused arguments in send.c sctx is removed from the argument of the function that doesn't use sctx. Signed-off-by: Tsutomu Itoh <t-itoh@jp.fujitsu.com> Signed-off-by: Josef Bacik <jbacik@fusionio.com>
2013-05-08 07:51:52 +00:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: fix send issues related to inode number reuse If you are sending a snapshot and specifying a parent snapshot we will walk the trees and figure out where they differ and send the differences only. The way we check for differences are if the leaves aren't the same and if the keys are not the same within the leaves. So if neither leaf is the same (ie the leaf has been cow'ed from the parent snapshot) we walk each item in the send root and check it against the parent root. If the items match exactly then we don't do anything. This doesn't quite work for inode refs, since they will just have the name and the parent objectid. If you move the file from a directory and then remove that directory and re-create a directory with the same inode number as the old directory and then move that file back into that directory we will assume that nothing changed and you will get errors when you try to receive. In order to fix this we need to do extra checking to see if the inode ref really is the same or not. So do this by passing down BTRFS_COMPARE_TREE_SAME if the items match. Then if the key type is an inode ref we can do some extra checking, otherwise we just keep processing. The extra checking is to look up the generation of the directory in the parent volume and compare it to the generation of the send volume. If they match then they are the same directory and we are good to go. If they don't we have to add them to the changed refs list. This means we have to track the generation of the ref we're trying to lookup when we iterate all the refs for a particular inode. So in the case of looking for new refs we have to get the generation from the parent volume, and in the case of looking for deleted refs we have to get the generation from the send volume to compare with. There was also the issue of using a ulist to keep track of the directories we needed to check. Because we can get a deleted ref and a new ref for the same inode number the ulist won't work since it indexes based on the value. So instead just dup any directory ref we find and add it to a local list, and then process that list as normal and do away with using a ulist for this altogether. Before we would fail all of the tests in the far-progs that related to moving directories (test group 32). With this patch we now pass these tests, and all of the tests in the far-progs send testing suite. Thanks, Signed-off-by: Josef Bacik <jbacik@fusionio.com> Signed-off-by: Chris Mason <chris.mason@fusionio.com>
2013-08-16 16:52:55 -04:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: fix send issues related to inode number reuse If you are sending a snapshot and specifying a parent snapshot we will walk the trees and figure out where they differ and send the differences only. The way we check for differences are if the leaves aren't the same and if the keys are not the same within the leaves. So if neither leaf is the same (ie the leaf has been cow'ed from the parent snapshot) we walk each item in the send root and check it against the parent root. If the items match exactly then we don't do anything. This doesn't quite work for inode refs, since they will just have the name and the parent objectid. If you move the file from a directory and then remove that directory and re-create a directory with the same inode number as the old directory and then move that file back into that directory we will assume that nothing changed and you will get errors when you try to receive. In order to fix this we need to do extra checking to see if the inode ref really is the same or not. So do this by passing down BTRFS_COMPARE_TREE_SAME if the items match. Then if the key type is an inode ref we can do some extra checking, otherwise we just keep processing. The extra checking is to look up the generation of the directory in the parent volume and compare it to the generation of the send volume. If they match then they are the same directory and we are good to go. If they don't we have to add them to the changed refs list. This means we have to track the generation of the ref we're trying to lookup when we iterate all the refs for a particular inode. So in the case of looking for new refs we have to get the generation from the parent volume, and in the case of looking for deleted refs we have to get the generation from the send volume to compare with. There was also the issue of using a ulist to keep track of the directories we needed to check. Because we can get a deleted ref and a new ref for the same inode number the ulist won't work since it indexes based on the value. So instead just dup any directory ref we find and add it to a local list, and then process that list as normal and do away with using a ulist for this altogether. Before we would fail all of the tests in the far-progs that related to moving directories (test group 32). With this patch we now pass these tests, and all of the tests in the far-progs send testing suite. Thanks, Signed-off-by: Josef Bacik <jbacik@fusionio.com> Signed-off-by: Chris Mason <chris.mason@fusionio.com>
2013-08-16 16:52:55 -04:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: fix send issues related to inode number reuse If you are sending a snapshot and specifying a parent snapshot we will walk the trees and figure out where they differ and send the differences only. The way we check for differences are if the leaves aren't the same and if the keys are not the same within the leaves. So if neither leaf is the same (ie the leaf has been cow'ed from the parent snapshot) we walk each item in the send root and check it against the parent root. If the items match exactly then we don't do anything. This doesn't quite work for inode refs, since they will just have the name and the parent objectid. If you move the file from a directory and then remove that directory and re-create a directory with the same inode number as the old directory and then move that file back into that directory we will assume that nothing changed and you will get errors when you try to receive. In order to fix this we need to do extra checking to see if the inode ref really is the same or not. So do this by passing down BTRFS_COMPARE_TREE_SAME if the items match. Then if the key type is an inode ref we can do some extra checking, otherwise we just keep processing. The extra checking is to look up the generation of the directory in the parent volume and compare it to the generation of the send volume. If they match then they are the same directory and we are good to go. If they don't we have to add them to the changed refs list. This means we have to track the generation of the ref we're trying to lookup when we iterate all the refs for a particular inode. So in the case of looking for new refs we have to get the generation from the parent volume, and in the case of looking for deleted refs we have to get the generation from the send volume to compare with. There was also the issue of using a ulist to keep track of the directories we needed to check. Because we can get a deleted ref and a new ref for the same inode number the ulist won't work since it indexes based on the value. So instead just dup any directory ref we find and add it to a local list, and then process that list as normal and do away with using a ulist for this altogether. Before we would fail all of the tests in the far-progs that related to moving directories (test group 32). With this patch we now pass these tests, and all of the tests in the far-progs send testing suite. Thanks, Signed-off-by: Josef Bacik <jbacik@fusionio.com> Signed-off-by: Chris Mason <chris.mason@fusionio.com>
2013-08-16 16:52:55 -04:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: cleanup unused arguments in send.c sctx is removed from the argument of the function that doesn't use sctx. Signed-off-by: Tsutomu Itoh <t-itoh@jp.fujitsu.com> Signed-off-by: Josef Bacik <jbacik@fusionio.com>
2013-05-08 07:51:52 +00:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: fix send issues related to inode number reuse If you are sending a snapshot and specifying a parent snapshot we will walk the trees and figure out where they differ and send the differences only. The way we check for differences are if the leaves aren't the same and if the keys are not the same within the leaves. So if neither leaf is the same (ie the leaf has been cow'ed from the parent snapshot) we walk each item in the send root and check it against the parent root. If the items match exactly then we don't do anything. This doesn't quite work for inode refs, since they will just have the name and the parent objectid. If you move the file from a directory and then remove that directory and re-create a directory with the same inode number as the old directory and then move that file back into that directory we will assume that nothing changed and you will get errors when you try to receive. In order to fix this we need to do extra checking to see if the inode ref really is the same or not. So do this by passing down BTRFS_COMPARE_TREE_SAME if the items match. Then if the key type is an inode ref we can do some extra checking, otherwise we just keep processing. The extra checking is to look up the generation of the directory in the parent volume and compare it to the generation of the send volume. If they match then they are the same directory and we are good to go. If they don't we have to add them to the changed refs list. This means we have to track the generation of the ref we're trying to lookup when we iterate all the refs for a particular inode. So in the case of looking for new refs we have to get the generation from the parent volume, and in the case of looking for deleted refs we have to get the generation from the send volume to compare with. There was also the issue of using a ulist to keep track of the directories we needed to check. Because we can get a deleted ref and a new ref for the same inode number the ulist won't work since it indexes based on the value. So instead just dup any directory ref we find and add it to a local list, and then process that list as normal and do away with using a ulist for this altogether. Before we would fail all of the tests in the far-progs that related to moving directories (test group 32). With this patch we now pass these tests, and all of the tests in the far-progs send testing suite. Thanks, Signed-off-by: Josef Bacik <jbacik@fusionio.com> Signed-off-by: Chris Mason <chris.mason@fusionio.com>
2013-08-16 16:52:55 -04:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: fix send issues related to inode number reuse If you are sending a snapshot and specifying a parent snapshot we will walk the trees and figure out where they differ and send the differences only. The way we check for differences are if the leaves aren't the same and if the keys are not the same within the leaves. So if neither leaf is the same (ie the leaf has been cow'ed from the parent snapshot) we walk each item in the send root and check it against the parent root. If the items match exactly then we don't do anything. This doesn't quite work for inode refs, since they will just have the name and the parent objectid. If you move the file from a directory and then remove that directory and re-create a directory with the same inode number as the old directory and then move that file back into that directory we will assume that nothing changed and you will get errors when you try to receive. In order to fix this we need to do extra checking to see if the inode ref really is the same or not. So do this by passing down BTRFS_COMPARE_TREE_SAME if the items match. Then if the key type is an inode ref we can do some extra checking, otherwise we just keep processing. The extra checking is to look up the generation of the directory in the parent volume and compare it to the generation of the send volume. If they match then they are the same directory and we are good to go. If they don't we have to add them to the changed refs list. This means we have to track the generation of the ref we're trying to lookup when we iterate all the refs for a particular inode. So in the case of looking for new refs we have to get the generation from the parent volume, and in the case of looking for deleted refs we have to get the generation from the send volume to compare with. There was also the issue of using a ulist to keep track of the directories we needed to check. Because we can get a deleted ref and a new ref for the same inode number the ulist won't work since it indexes based on the value. So instead just dup any directory ref we find and add it to a local list, and then process that list as normal and do away with using a ulist for this altogether. Before we would fail all of the tests in the far-progs that related to moving directories (test group 32). With this patch we now pass these tests, and all of the tests in the far-progs send testing suite. Thanks, Signed-off-by: Josef Bacik <jbacik@fusionio.com> Signed-off-by: Chris Mason <chris.mason@fusionio.com>
2013-08-16 16:52:55 -04:00
Btrfs: cleanup unused arguments in send.c sctx is removed from the argument of the function that doesn't use sctx. Signed-off-by: Tsutomu Itoh <t-itoh@jp.fujitsu.com> Signed-off-by: Josef Bacik <jbacik@fusionio.com>
2013-05-08 07:51:52 +00:00
Btrfs: fix send issues related to inode number reuse If you are sending a snapshot and specifying a parent snapshot we will walk the trees and figure out where they differ and send the differences only. The way we check for differences are if the leaves aren't the same and if the keys are not the same within the leaves. So if neither leaf is the same (ie the leaf has been cow'ed from the parent snapshot) we walk each item in the send root and check it against the parent root. If the items match exactly then we don't do anything. This doesn't quite work for inode refs, since they will just have the name and the parent objectid. If you move the file from a directory and then remove that directory and re-create a directory with the same inode number as the old directory and then move that file back into that directory we will assume that nothing changed and you will get errors when you try to receive. In order to fix this we need to do extra checking to see if the inode ref really is the same or not. So do this by passing down BTRFS_COMPARE_TREE_SAME if the items match. Then if the key type is an inode ref we can do some extra checking, otherwise we just keep processing. The extra checking is to look up the generation of the directory in the parent volume and compare it to the generation of the send volume. If they match then they are the same directory and we are good to go. If they don't we have to add them to the changed refs list. This means we have to track the generation of the ref we're trying to lookup when we iterate all the refs for a particular inode. So in the case of looking for new refs we have to get the generation from the parent volume, and in the case of looking for deleted refs we have to get the generation from the send volume to compare with. There was also the issue of using a ulist to keep track of the directories we needed to check. Because we can get a deleted ref and a new ref for the same inode number the ulist won't work since it indexes based on the value. So instead just dup any directory ref we find and add it to a local list, and then process that list as normal and do away with using a ulist for this altogether. Before we would fail all of the tests in the far-progs that related to moving directories (test group 32). With this patch we now pass these tests, and all of the tests in the far-progs send testing suite. Thanks, Signed-off-by: Josef Bacik <jbacik@fusionio.com> Signed-off-by: Chris Mason <chris.mason@fusionio.com>
2013-08-16 16:52:55 -04:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: fix send issues related to inode number reuse If you are sending a snapshot and specifying a parent snapshot we will walk the trees and figure out where they differ and send the differences only. The way we check for differences are if the leaves aren't the same and if the keys are not the same within the leaves. So if neither leaf is the same (ie the leaf has been cow'ed from the parent snapshot) we walk each item in the send root and check it against the parent root. If the items match exactly then we don't do anything. This doesn't quite work for inode refs, since they will just have the name and the parent objectid. If you move the file from a directory and then remove that directory and re-create a directory with the same inode number as the old directory and then move that file back into that directory we will assume that nothing changed and you will get errors when you try to receive. In order to fix this we need to do extra checking to see if the inode ref really is the same or not. So do this by passing down BTRFS_COMPARE_TREE_SAME if the items match. Then if the key type is an inode ref we can do some extra checking, otherwise we just keep processing. The extra checking is to look up the generation of the directory in the parent volume and compare it to the generation of the send volume. If they match then they are the same directory and we are good to go. If they don't we have to add them to the changed refs list. This means we have to track the generation of the ref we're trying to lookup when we iterate all the refs for a particular inode. So in the case of looking for new refs we have to get the generation from the parent volume, and in the case of looking for deleted refs we have to get the generation from the send volume to compare with. There was also the issue of using a ulist to keep track of the directories we needed to check. Because we can get a deleted ref and a new ref for the same inode number the ulist won't work since it indexes based on the value. So instead just dup any directory ref we find and add it to a local list, and then process that list as normal and do away with using a ulist for this altogether. Before we would fail all of the tests in the far-progs that related to moving directories (test group 32). With this patch we now pass these tests, and all of the tests in the far-progs send testing suite. Thanks, Signed-off-by: Josef Bacik <jbacik@fusionio.com> Signed-off-by: Chris Mason <chris.mason@fusionio.com>
2013-08-16 16:52:55 -04:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: fix send issues related to inode number reuse If you are sending a snapshot and specifying a parent snapshot we will walk the trees and figure out where they differ and send the differences only. The way we check for differences are if the leaves aren't the same and if the keys are not the same within the leaves. So if neither leaf is the same (ie the leaf has been cow'ed from the parent snapshot) we walk each item in the send root and check it against the parent root. If the items match exactly then we don't do anything. This doesn't quite work for inode refs, since they will just have the name and the parent objectid. If you move the file from a directory and then remove that directory and re-create a directory with the same inode number as the old directory and then move that file back into that directory we will assume that nothing changed and you will get errors when you try to receive. In order to fix this we need to do extra checking to see if the inode ref really is the same or not. So do this by passing down BTRFS_COMPARE_TREE_SAME if the items match. Then if the key type is an inode ref we can do some extra checking, otherwise we just keep processing. The extra checking is to look up the generation of the directory in the parent volume and compare it to the generation of the send volume. If they match then they are the same directory and we are good to go. If they don't we have to add them to the changed refs list. This means we have to track the generation of the ref we're trying to lookup when we iterate all the refs for a particular inode. So in the case of looking for new refs we have to get the generation from the parent volume, and in the case of looking for deleted refs we have to get the generation from the send volume to compare with. There was also the issue of using a ulist to keep track of the directories we needed to check. Because we can get a deleted ref and a new ref for the same inode number the ulist won't work since it indexes based on the value. So instead just dup any directory ref we find and add it to a local list, and then process that list as normal and do away with using a ulist for this altogether. Before we would fail all of the tests in the far-progs that related to moving directories (test group 32). With this patch we now pass these tests, and all of the tests in the far-progs send testing suite. Thanks, Signed-off-by: Josef Bacik <jbacik@fusionio.com> Signed-off-by: Chris Mason <chris.mason@fusionio.com>
2013-08-16 16:52:55 -04:00
Btrfs: cleanup unused arguments in send.c sctx is removed from the argument of the function that doesn't use sctx. Signed-off-by: Tsutomu Itoh <t-itoh@jp.fujitsu.com> Signed-off-by: Josef Bacik <jbacik@fusionio.com>
2013-05-08 07:51:52 +00:00
Btrfs: fix send issues related to inode number reuse If you are sending a snapshot and specifying a parent snapshot we will walk the trees and figure out where they differ and send the differences only. The way we check for differences are if the leaves aren't the same and if the keys are not the same within the leaves. So if neither leaf is the same (ie the leaf has been cow'ed from the parent snapshot) we walk each item in the send root and check it against the parent root. If the items match exactly then we don't do anything. This doesn't quite work for inode refs, since they will just have the name and the parent objectid. If you move the file from a directory and then remove that directory and re-create a directory with the same inode number as the old directory and then move that file back into that directory we will assume that nothing changed and you will get errors when you try to receive. In order to fix this we need to do extra checking to see if the inode ref really is the same or not. So do this by passing down BTRFS_COMPARE_TREE_SAME if the items match. Then if the key type is an inode ref we can do some extra checking, otherwise we just keep processing. The extra checking is to look up the generation of the directory in the parent volume and compare it to the generation of the send volume. If they match then they are the same directory and we are good to go. If they don't we have to add them to the changed refs list. This means we have to track the generation of the ref we're trying to lookup when we iterate all the refs for a particular inode. So in the case of looking for new refs we have to get the generation from the parent volume, and in the case of looking for deleted refs we have to get the generation from the send volume to compare with. There was also the issue of using a ulist to keep track of the directories we needed to check. Because we can get a deleted ref and a new ref for the same inode number the ulist won't work since it indexes based on the value. So instead just dup any directory ref we find and add it to a local list, and then process that list as normal and do away with using a ulist for this altogether. Before we would fail all of the tests in the far-progs that related to moving directories (test group 32). With this patch we now pass these tests, and all of the tests in the far-progs send testing suite. Thanks, Signed-off-by: Josef Bacik <jbacik@fusionio.com> Signed-off-by: Chris Mason <chris.mason@fusionio.com>
2013-08-16 16:52:55 -04:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: cleanup unused arguments in send.c sctx is removed from the argument of the function that doesn't use sctx. Signed-off-by: Tsutomu Itoh <t-itoh@jp.fujitsu.com> Signed-off-by: Josef Bacik <jbacik@fusionio.com>
2013-05-08 07:51:52 +00:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: cleanup unused arguments in send.c sctx is removed from the argument of the function that doesn't use sctx. Signed-off-by: Tsutomu Itoh <t-itoh@jp.fujitsu.com> Signed-off-by: Josef Bacik <jbacik@fusionio.com>
2013-05-08 07:51:52 +00:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: fix infinite path build loops in incremental send The send operation processes inodes by their ascending number, and assumes that any rename/move operation can be successfully performed (sent to the caller) once all previous inodes (those with a smaller inode number than the one we're currently processing) were processed. This is not true when an incremental send had to process an hierarchical change between 2 snapshots where the parent-children relationship between directory inodes was reversed - that is, parents became children and children became parents. This situation made the path building code go into an infinite loop, which kept allocating more and more memory that eventually lead to a krealloc warning being displayed in dmesg: WARNING: CPU: 1 PID: 5705 at mm/page_alloc.c:2477 __alloc_pages_nodemask+0x365/0xad0() Modules linked in: btrfs raid6_pq xor pci_stub vboxpci(O) vboxnetadp(O) vboxnetflt(O) vboxdrv(O) snd_hda_codec_hdmi snd_hda_codec_realtek joydev radeon snd_hda_intel snd_hda_codec snd_hwdep snd_seq_midi snd_pcm psmouse i915 snd_rawmidi serio_raw snd_seq_midi_event lpc_ich snd_seq snd_timer ttm snd_seq_device rfcomm drm_kms_helper parport_pc bnep bluetooth drm ppdev snd soundcore i2c_algo_bit snd_page_alloc binfmt_misc video lp parport r8169 mii hid_generic usbhid hid CPU: 1 PID: 5705 Comm: btrfs Tainted: G O 3.13.0-rc7-fdm-btrfs-next-18+ #3 Hardware name: To Be Filled By O.E.M. To Be Filled By O.E.M./Z77 Pro4, BIOS P1.50 09/04/2012 [ 5381.660441] 00000000000009ad ffff8806f6f2f4e8 ffffffff81777434 0000000000000007 [ 5381.660447] 0000000000000000 ffff8806f6f2f528 ffffffff8104a9ec ffff8807038f36f0 [ 5381.660452] 0000000000000000 0000000000000206 ffff8807038f2490 ffff8807038f36f0 [ 5381.660457] Call Trace: [ 5381.660464] [<ffffffff81777434>] dump_stack+0x4e/0x68 [ 5381.660471] [<ffffffff8104a9ec>] warn_slowpath_common+0x8c/0xc0 [ 5381.660476] [<ffffffff8104aa3a>] warn_slowpath_null+0x1a/0x20 [ 5381.660480] [<ffffffff81144995>] __alloc_pages_nodemask+0x365/0xad0 [ 5381.660487] [<ffffffff8108313f>] ? local_clock+0x4f/0x60 [ 5381.660491] [<ffffffff811430e8>] ? free_one_page+0x98/0x440 [ 5381.660495] [<ffffffff8108313f>] ? local_clock+0x4f/0x60 [ 5381.660502] [<ffffffff8113fae4>] ? __get_free_pages+0x14/0x50 [ 5381.660508] [<ffffffff81095fb8>] ? trace_hardirqs_off_caller+0x28/0xd0 [ 5381.660515] [<ffffffff81183caf>] alloc_pages_current+0x10f/0x1f0 [ 5381.660520] [<ffffffff8113fae4>] ? __get_free_pages+0x14/0x50 [ 5381.660524] [<ffffffff8113fae4>] __get_free_pages+0x14/0x50 [ 5381.660530] [<ffffffff8115dace>] kmalloc_order_trace+0x3e/0x100 [ 5381.660536] [<ffffffff81191ea0>] __kmalloc_track_caller+0x220/0x230 [ 5381.660560] [<ffffffffa0729fdb>] ? fs_path_ensure_buf.part.12+0x6b/0x200 [btrfs] [ 5381.660564] [<ffffffff8178085c>] ? retint_restore_args+0xe/0xe [ 5381.660569] [<ffffffff811580ef>] krealloc+0x6f/0xb0 [ 5381.660586] [<ffffffffa0729fdb>] fs_path_ensure_buf.part.12+0x6b/0x200 [btrfs] [ 5381.660601] [<ffffffffa072a208>] fs_path_prepare_for_add+0x98/0xb0 [btrfs] [ 5381.660615] [<ffffffffa072a2bc>] fs_path_add_path+0x2c/0x60 [btrfs] [ 5381.660628] [<ffffffffa072c55c>] get_cur_path+0x7c/0x1c0 [btrfs] Even without this loop, the incremental send couldn't succeed, because it would attempt to send a rename/move operation for the lower inode before the highest inode number was renamed/move. This issue is easy to trigger with the following steps: $ mkfs.btrfs -f /dev/sdb3 $ mount /dev/sdb3 /mnt/btrfs $ mkdir -p /mnt/btrfs/a/b/c/d $ mkdir /mnt/btrfs/a/b/c2 $ btrfs subvol snapshot -r /mnt/btrfs /mnt/btrfs/snap1 $ mv /mnt/btrfs/a/b/c/d /mnt/btrfs/a/b/c2/d2 $ mv /mnt/btrfs/a/b/c /mnt/btrfs/a/b/c2/d2/cc $ btrfs subvol snapshot -r /mnt/btrfs /mnt/btrfs/snap2 $ btrfs send -p /mnt/btrfs/snap1 /mnt/btrfs/snap2 > /tmp/incremental.send The structure of the filesystem when the first snapshot is taken is: . (ino 256) |-- a (ino 257) |-- b (ino 258) |-- c (ino 259) | |-- d (ino 260) | |-- c2 (ino 261) And its structure when the second snapshot is taken is: . (ino 256) |-- a (ino 257) |-- b (ino 258) |-- c2 (ino 261) |-- d2 (ino 260) |-- cc (ino 259) Before the move/rename operation is performed for the inode 259, the move/rename for inode 260 must be performed, since 259 is now a child of 260. A test case for xfstests, with a more complex scenario, will follow soon. Signed-off-by: Filipe David Borba Manana <fdmanana@gmail.com> Signed-off-by: Josef Bacik <jbacik@fb.com> Signed-off-by: Chris Mason <clm@fb.com>
2014-01-22 10:00:53 +00:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
btrfs: send: remove BUG from process_all_refs There are only 2 static callers, the BUG would normally be never reached, but let's be nice. Signed-off-by: David Sterba <dsterba@suse.cz> Signed-off-by: Josef Bacik <jbacik@fb.com>
2014-02-03 19:24:19 +01:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: make some tree searches in send.c more efficient We have this pattern where we do search for a contiguous group of items in a tree and everytime we find an item, we process it, then we release our path, increment the offset of the search key, do another full tree search and repeat these steps until a tree search can't find more items we're interested in. Instead of doing these full tree searches after processing each item, just process the next item/slot in our leaf and don't release the path. Since all these trees are read only and we always use the commit root for a search and skip node/leaf locks, we're not affecting concurrency on the trees. Signed-off-by: Filipe David Borba Manana <fdmanana@gmail.com> Signed-off-by: Josef Bacik <jbacik@fb.com>
2014-02-05 16:48:56 +00:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: make some tree searches in send.c more efficient We have this pattern where we do search for a contiguous group of items in a tree and everytime we find an item, we process it, then we release our path, increment the offset of the search key, do another full tree search and repeat these steps until a tree search can't find more items we're interested in. Instead of doing these full tree searches after processing each item, just process the next item/slot in our leaf and don't release the path. Since all these trees are read only and we always use the commit root for a search and skip node/leaf locks, we're not affecting concurrency on the trees. Signed-off-by: Filipe David Borba Manana <fdmanana@gmail.com> Signed-off-by: Josef Bacik <jbacik@fb.com>
2014-02-05 16:48:56 +00:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: make some tree searches in send.c more efficient We have this pattern where we do search for a contiguous group of items in a tree and everytime we find an item, we process it, then we release our path, increment the offset of the search key, do another full tree search and repeat these steps until a tree search can't find more items we're interested in. Instead of doing these full tree searches after processing each item, just process the next item/slot in our leaf and don't release the path. Since all these trees are read only and we always use the commit root for a search and skip node/leaf locks, we're not affecting concurrency on the trees. Signed-off-by: Filipe David Borba Manana <fdmanana@gmail.com> Signed-off-by: Josef Bacik <jbacik@fb.com>
2014-02-05 16:48:56 +00:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: extended inode refs support for send mechanism This adds support for the new extended inode refs to btrfs send. Signed-off-by: Jan Schmidt <list.btrfs@jan-o-sch.net>
2012-10-15 08:30:45 +00:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: cleanup unused arguments in send.c sctx is removed from the argument of the function that doesn't use sctx. Signed-off-by: Tsutomu Itoh <t-itoh@jp.fujitsu.com> Signed-off-by: Josef Bacik <jbacik@fusionio.com>
2013-05-08 07:51:52 +00:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: make some tree searches in send.c more efficient We have this pattern where we do search for a contiguous group of items in a tree and everytime we find an item, we process it, then we release our path, increment the offset of the search key, do another full tree search and repeat these steps until a tree search can't find more items we're interested in. Instead of doing these full tree searches after processing each item, just process the next item/slot in our leaf and don't release the path. Since all these trees are read only and we always use the commit root for a search and skip node/leaf locks, we're not affecting concurrency on the trees. Signed-off-by: Filipe David Borba Manana <fdmanana@gmail.com> Signed-off-by: Josef Bacik <jbacik@fb.com>
2014-02-05 16:48:56 +00:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: code cleanups for send/receive Doing some code cleanups as suggested by Arne. Changes do not change any logic. Signed-off-by: Alexander Block <ablock84@googlemail.com>
2012-07-28 16:33:49 +02:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: fix infinite path build loops in incremental send The send operation processes inodes by their ascending number, and assumes that any rename/move operation can be successfully performed (sent to the caller) once all previous inodes (those with a smaller inode number than the one we're currently processing) were processed. This is not true when an incremental send had to process an hierarchical change between 2 snapshots where the parent-children relationship between directory inodes was reversed - that is, parents became children and children became parents. This situation made the path building code go into an infinite loop, which kept allocating more and more memory that eventually lead to a krealloc warning being displayed in dmesg: WARNING: CPU: 1 PID: 5705 at mm/page_alloc.c:2477 __alloc_pages_nodemask+0x365/0xad0() Modules linked in: btrfs raid6_pq xor pci_stub vboxpci(O) vboxnetadp(O) vboxnetflt(O) vboxdrv(O) snd_hda_codec_hdmi snd_hda_codec_realtek joydev radeon snd_hda_intel snd_hda_codec snd_hwdep snd_seq_midi snd_pcm psmouse i915 snd_rawmidi serio_raw snd_seq_midi_event lpc_ich snd_seq snd_timer ttm snd_seq_device rfcomm drm_kms_helper parport_pc bnep bluetooth drm ppdev snd soundcore i2c_algo_bit snd_page_alloc binfmt_misc video lp parport r8169 mii hid_generic usbhid hid CPU: 1 PID: 5705 Comm: btrfs Tainted: G O 3.13.0-rc7-fdm-btrfs-next-18+ #3 Hardware name: To Be Filled By O.E.M. To Be Filled By O.E.M./Z77 Pro4, BIOS P1.50 09/04/2012 [ 5381.660441] 00000000000009ad ffff8806f6f2f4e8 ffffffff81777434 0000000000000007 [ 5381.660447] 0000000000000000 ffff8806f6f2f528 ffffffff8104a9ec ffff8807038f36f0 [ 5381.660452] 0000000000000000 0000000000000206 ffff8807038f2490 ffff8807038f36f0 [ 5381.660457] Call Trace: [ 5381.660464] [<ffffffff81777434>] dump_stack+0x4e/0x68 [ 5381.660471] [<ffffffff8104a9ec>] warn_slowpath_common+0x8c/0xc0 [ 5381.660476] [<ffffffff8104aa3a>] warn_slowpath_null+0x1a/0x20 [ 5381.660480] [<ffffffff81144995>] __alloc_pages_nodemask+0x365/0xad0 [ 5381.660487] [<ffffffff8108313f>] ? local_clock+0x4f/0x60 [ 5381.660491] [<ffffffff811430e8>] ? free_one_page+0x98/0x440 [ 5381.660495] [<ffffffff8108313f>] ? local_clock+0x4f/0x60 [ 5381.660502] [<ffffffff8113fae4>] ? __get_free_pages+0x14/0x50 [ 5381.660508] [<ffffffff81095fb8>] ? trace_hardirqs_off_caller+0x28/0xd0 [ 5381.660515] [<ffffffff81183caf>] alloc_pages_current+0x10f/0x1f0 [ 5381.660520] [<ffffffff8113fae4>] ? __get_free_pages+0x14/0x50 [ 5381.660524] [<ffffffff8113fae4>] __get_free_pages+0x14/0x50 [ 5381.660530] [<ffffffff8115dace>] kmalloc_order_trace+0x3e/0x100 [ 5381.660536] [<ffffffff81191ea0>] __kmalloc_track_caller+0x220/0x230 [ 5381.660560] [<ffffffffa0729fdb>] ? fs_path_ensure_buf.part.12+0x6b/0x200 [btrfs] [ 5381.660564] [<ffffffff8178085c>] ? retint_restore_args+0xe/0xe [ 5381.660569] [<ffffffff811580ef>] krealloc+0x6f/0xb0 [ 5381.660586] [<ffffffffa0729fdb>] fs_path_ensure_buf.part.12+0x6b/0x200 [btrfs] [ 5381.660601] [<ffffffffa072a208>] fs_path_prepare_for_add+0x98/0xb0 [btrfs] [ 5381.660615] [<ffffffffa072a2bc>] fs_path_add_path+0x2c/0x60 [btrfs] [ 5381.660628] [<ffffffffa072c55c>] get_cur_path+0x7c/0x1c0 [btrfs] Even without this loop, the incremental send couldn't succeed, because it would attempt to send a rename/move operation for the lower inode before the highest inode number was renamed/move. This issue is easy to trigger with the following steps: $ mkfs.btrfs -f /dev/sdb3 $ mount /dev/sdb3 /mnt/btrfs $ mkdir -p /mnt/btrfs/a/b/c/d $ mkdir /mnt/btrfs/a/b/c2 $ btrfs subvol snapshot -r /mnt/btrfs /mnt/btrfs/snap1 $ mv /mnt/btrfs/a/b/c/d /mnt/btrfs/a/b/c2/d2 $ mv /mnt/btrfs/a/b/c /mnt/btrfs/a/b/c2/d2/cc $ btrfs subvol snapshot -r /mnt/btrfs /mnt/btrfs/snap2 $ btrfs send -p /mnt/btrfs/snap1 /mnt/btrfs/snap2 > /tmp/incremental.send The structure of the filesystem when the first snapshot is taken is: . (ino 256) |-- a (ino 257) |-- b (ino 258) |-- c (ino 259) | |-- d (ino 260) | |-- c2 (ino 261) And its structure when the second snapshot is taken is: . (ino 256) |-- a (ino 257) |-- b (ino 258) |-- c2 (ino 261) |-- d2 (ino 260) |-- cc (ino 259) Before the move/rename operation is performed for the inode 259, the move/rename for inode 260 must be performed, since 259 is now a child of 260. A test case for xfstests, with a more complex scenario, will follow soon. Signed-off-by: Filipe David Borba Manana <fdmanana@gmail.com> Signed-off-by: Josef Bacik <jbacik@fb.com> Signed-off-by: Chris Mason <clm@fb.com>
2014-01-22 10:00:53 +00:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: cleanup unused arguments in send.c sctx is removed from the argument of the function that doesn't use sctx. Signed-off-by: Tsutomu Itoh <t-itoh@jp.fujitsu.com> Signed-off-by: Josef Bacik <jbacik@fusionio.com>
2013-05-08 07:51:52 +00:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: cleanup unused arguments in send.c sctx is removed from the argument of the function that doesn't use sctx. Signed-off-by: Tsutomu Itoh <t-itoh@jp.fujitsu.com> Signed-off-by: Josef Bacik <jbacik@fusionio.com>
2013-05-08 07:51:52 +00:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: cleanup unused arguments in send.c sctx is removed from the argument of the function that doesn't use sctx. Signed-off-by: Tsutomu Itoh <t-itoh@jp.fujitsu.com> Signed-off-by: Josef Bacik <jbacik@fusionio.com>
2013-05-08 07:51:52 +00:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: cleanup unused arguments in send.c sctx is removed from the argument of the function that doesn't use sctx. Signed-off-by: Tsutomu Itoh <t-itoh@jp.fujitsu.com> Signed-off-by: Josef Bacik <jbacik@fusionio.com>
2013-05-08 07:51:52 +00:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: cleanup unused arguments in send.c sctx is removed from the argument of the function that doesn't use sctx. Signed-off-by: Tsutomu Itoh <t-itoh@jp.fujitsu.com> Signed-off-by: Josef Bacik <jbacik@fusionio.com>
2013-05-08 07:51:52 +00:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: cleanup unused arguments in send.c sctx is removed from the argument of the function that doesn't use sctx. Signed-off-by: Tsutomu Itoh <t-itoh@jp.fujitsu.com> Signed-off-by: Josef Bacik <jbacik@fusionio.com>
2013-05-08 07:51:52 +00:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: Cocci spatch "memdup.spatch" Signed-off-by: Thomas Meyer <thomas@m3y3r.de> Signed-off-by: Josef Bacik <jbacik@fusionio.com>
2013-06-01 09:37:50 +00:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: cleanup unused arguments in send.c sctx is removed from the argument of the function that doesn't use sctx. Signed-off-by: Tsutomu Itoh <t-itoh@jp.fujitsu.com> Signed-off-by: Josef Bacik <jbacik@fusionio.com>
2013-05-08 07:51:52 +00:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: cleanup unused arguments in send.c sctx is removed from the argument of the function that doesn't use sctx. Signed-off-by: Tsutomu Itoh <t-itoh@jp.fujitsu.com> Signed-off-by: Josef Bacik <jbacik@fusionio.com>
2013-05-08 07:51:52 +00:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: cleanup unused arguments in send.c sctx is removed from the argument of the function that doesn't use sctx. Signed-off-by: Tsutomu Itoh <t-itoh@jp.fujitsu.com> Signed-off-by: Josef Bacik <jbacik@fusionio.com>
2013-05-08 07:51:52 +00:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: cleanup unused arguments in send.c sctx is removed from the argument of the function that doesn't use sctx. Signed-off-by: Tsutomu Itoh <t-itoh@jp.fujitsu.com> Signed-off-by: Josef Bacik <jbacik@fusionio.com>
2013-05-08 07:51:52 +00:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: cleanup unused arguments in send.c sctx is removed from the argument of the function that doesn't use sctx. Signed-off-by: Tsutomu Itoh <t-itoh@jp.fujitsu.com> Signed-off-by: Josef Bacik <jbacik@fusionio.com>
2013-05-08 07:51:52 +00:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: cleanup unused arguments in send.c sctx is removed from the argument of the function that doesn't use sctx. Signed-off-by: Tsutomu Itoh <t-itoh@jp.fujitsu.com> Signed-off-by: Josef Bacik <jbacik@fusionio.com>
2013-05-08 07:51:52 +00:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: make some tree searches in send.c more efficient We have this pattern where we do search for a contiguous group of items in a tree and everytime we find an item, we process it, then we release our path, increment the offset of the search key, do another full tree search and repeat these steps until a tree search can't find more items we're interested in. Instead of doing these full tree searches after processing each item, just process the next item/slot in our leaf and don't release the path. Since all these trees are read only and we always use the commit root for a search and skip node/leaf locks, we're not affecting concurrency on the trees. Signed-off-by: Filipe David Borba Manana <fdmanana@gmail.com> Signed-off-by: Josef Bacik <jbacik@fb.com>
2014-02-05 16:48:56 +00:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: make some tree searches in send.c more efficient We have this pattern where we do search for a contiguous group of items in a tree and everytime we find an item, we process it, then we release our path, increment the offset of the search key, do another full tree search and repeat these steps until a tree search can't find more items we're interested in. Instead of doing these full tree searches after processing each item, just process the next item/slot in our leaf and don't release the path. Since all these trees are read only and we always use the commit root for a search and skip node/leaf locks, we're not affecting concurrency on the trees. Signed-off-by: Filipe David Borba Manana <fdmanana@gmail.com> Signed-off-by: Josef Bacik <jbacik@fb.com>
2014-02-05 16:48:56 +00:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: make some tree searches in send.c more efficient We have this pattern where we do search for a contiguous group of items in a tree and everytime we find an item, we process it, then we release our path, increment the offset of the search key, do another full tree search and repeat these steps until a tree search can't find more items we're interested in. Instead of doing these full tree searches after processing each item, just process the next item/slot in our leaf and don't release the path. Since all these trees are read only and we always use the commit root for a search and skip node/leaf locks, we're not affecting concurrency on the trees. Signed-off-by: Filipe David Borba Manana <fdmanana@gmail.com> Signed-off-by: Josef Bacik <jbacik@fb.com>
2014-02-05 16:48:56 +00:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: make some tree searches in send.c more efficient We have this pattern where we do search for a contiguous group of items in a tree and everytime we find an item, we process it, then we release our path, increment the offset of the search key, do another full tree search and repeat these steps until a tree search can't find more items we're interested in. Instead of doing these full tree searches after processing each item, just process the next item/slot in our leaf and don't release the path. Since all these trees are read only and we always use the commit root for a search and skip node/leaf locks, we're not affecting concurrency on the trees. Signed-off-by: Filipe David Borba Manana <fdmanana@gmail.com> Signed-off-by: Josef Bacik <jbacik@fb.com>
2014-02-05 16:48:56 +00:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: cleanup unused arguments in send.c sctx is removed from the argument of the function that doesn't use sctx. Signed-off-by: Tsutomu Itoh <t-itoh@jp.fujitsu.com> Signed-off-by: Josef Bacik <jbacik@fusionio.com>
2013-05-08 07:51:52 +00:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: make some tree searches in send.c more efficient We have this pattern where we do search for a contiguous group of items in a tree and everytime we find an item, we process it, then we release our path, increment the offset of the search key, do another full tree search and repeat these steps until a tree search can't find more items we're interested in. Instead of doing these full tree searches after processing each item, just process the next item/slot in our leaf and don't release the path. Since all these trees are read only and we always use the commit root for a search and skip node/leaf locks, we're not affecting concurrency on the trees. Signed-off-by: Filipe David Borba Manana <fdmanana@gmail.com> Signed-off-by: Josef Bacik <jbacik@fb.com>
2014-02-05 16:48:56 +00:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: stop using vfs_read in send Apparently we don't actually close the files until we return to userspace, so stop using vfs_read in send. This is actually better for us since we can avoid all the extra logic of holding the file we're sending open and making sure to clean it up. This will fix people who have been hitting too many files open errors when trying to send. Thanks, Signed-off-by: Josef Bacik <jbacik@fusionio.com> Signed-off-by: Chris Mason <chris.mason@fusionio.com>
2013-10-25 11:36:01 -04:00
Btrfs: add readahead for send_write Btrfs send reads data from disk and then writes to a stream via pipe or a file via flush. Currently we're going to read each page a time, so every page results in a disk read, which is not friendly to disks, esp. HDD. Given that, the performance can be gained by adding readahead for those pages. Here is a quick test: $ btrfs subvolume create send $ xfs_io -f -c "pwrite 0 1G" send/foobar $ btrfs subvolume snap -r send ro $ time "btrfs send ro -f /dev/null" w/o w real 1m37.527s 0m9.097s user 0m0.122s 0m0.086s sys 0m53.191s 0m12.857s Signed-off-by: Liu Bo <bo.li.liu@oracle.com> Reviewed-by: David Sterba <dsterba@suse.cz> Signed-off-by: Josef Bacik <jbacik@fb.com>
2014-03-05 10:07:35 +08:00
Btrfs: stop using vfs_read in send Apparently we don't actually close the files until we return to userspace, so stop using vfs_read in send. This is actually better for us since we can avoid all the extra logic of holding the file we're sending open and making sure to clean it up. This will fix people who have been hitting too many files open errors when trying to send. Thanks, Signed-off-by: Josef Bacik <jbacik@fusionio.com> Signed-off-by: Chris Mason <chris.mason@fusionio.com>
2013-10-25 11:36:01 -04:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: stop using vfs_read in send Apparently we don't actually close the files until we return to userspace, so stop using vfs_read in send. This is actually better for us since we can avoid all the extra logic of holding the file we're sending open and making sure to clean it up. This will fix people who have been hitting too many files open errors when trying to send. Thanks, Signed-off-by: Josef Bacik <jbacik@fusionio.com> Signed-off-by: Chris Mason <chris.mason@fusionio.com>
2013-10-25 11:36:01 -04:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: cleanup unused arguments in send.c sctx is removed from the argument of the function that doesn't use sctx. Signed-off-by: Tsutomu Itoh <t-itoh@jp.fujitsu.com> Signed-off-by: Josef Bacik <jbacik@fusionio.com>
2013-05-08 07:51:52 +00:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: stop using vfs_read in send Apparently we don't actually close the files until we return to userspace, so stop using vfs_read in send. This is actually better for us since we can avoid all the extra logic of holding the file we're sending open and making sure to clean it up. This will fix people who have been hitting too many files open errors when trying to send. Thanks, Signed-off-by: Josef Bacik <jbacik@fusionio.com> Signed-off-by: Chris Mason <chris.mason@fusionio.com>
2013-10-25 11:36:01 -04:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: stop using vfs_read in send Apparently we don't actually close the files until we return to userspace, so stop using vfs_read in send. This is actually better for us since we can avoid all the extra logic of holding the file we're sending open and making sure to clean it up. This will fix people who have been hitting too many files open errors when trying to send. Thanks, Signed-off-by: Josef Bacik <jbacik@fusionio.com> Signed-off-by: Chris Mason <chris.mason@fusionio.com>
2013-10-25 11:36:01 -04:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: code cleanups for send/receive Doing some code cleanups as suggested by Arne. Changes do not change any logic. Signed-off-by: Alexander Block <ablock84@googlemail.com>
2012-07-28 16:33:49 +02:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: cleanup unused arguments in send.c sctx is removed from the argument of the function that doesn't use sctx. Signed-off-by: Tsutomu Itoh <t-itoh@jp.fujitsu.com> Signed-off-by: Josef Bacik <jbacik@fusionio.com>
2013-05-08 07:51:52 +00:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: code cleanups for send/receive Doing some code cleanups as suggested by Arne. Changes do not change any logic. Signed-off-by: Alexander Block <ablock84@googlemail.com>
2012-07-28 16:33:49 +02:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: cleanup unused arguments in send.c sctx is removed from the argument of the function that doesn't use sctx. Signed-off-by: Tsutomu Itoh <t-itoh@jp.fujitsu.com> Signed-off-by: Josef Bacik <jbacik@fusionio.com>
2013-05-08 07:51:52 +00:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: code cleanups for send/receive Doing some code cleanups as suggested by Arne. Changes do not change any logic. Signed-off-by: Alexander Block <ablock84@googlemail.com>
2012-07-28 16:33:49 +02:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: add rdev to get_inode_info in send/receive We need rdev in the next commit. Signed-off-by: Alexander Block <ablock84@googlemail.com>
2012-07-26 23:39:10 +02:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: cleanup unused arguments in send.c sctx is removed from the argument of the function that doesn't use sctx. Signed-off-by: Tsutomu Itoh <t-itoh@jp.fujitsu.com> Signed-off-by: Josef Bacik <jbacik@fusionio.com>
2013-05-08 07:51:52 +00:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: use received_uuid of parent during send Neil Horman pointed out a problem where if he did something like this receive A snap A B change B send -p A B and then on another box do recieve A receive B the receive B would fail because we use the UUID of A for the clone sources for B. This makes sense most of the time because normally you are sending from the original sources, not a received source. However when you use a recieved subvol its UUID is going to be something completely different, so if you then try to receive the diff on a different volume it won't find the UUID because the new A will be something else. The only constant is the received uuid. So instead check to see if we have received_uuid set on the root, and if so use that as the clone source, as btrfs receive looks for matches either in received_uuid or uuid. Thanks, Reported-by: Neil Horman <nhorman@redhat.com> Signed-off-by: Josef Bacik <jbacik@fb.com> Reviewed-by: Hugo Mills <hugo@carfax.org.uk> Signed-off-by: Chris Mason <clm@fb.com>
2015-06-04 17:17:25 -04:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: fix pass of transid with wrong endianness in send.c fs/btrfs/send.c:2190:9: warning: incorrect type in argument 3 (different base types) fs/btrfs/send.c:2190:9: expected unsigned long long [unsigned] [usertype] value fs/btrfs/send.c:2190:9: got restricted __le64 [usertype] ctransid fs/btrfs/send.c:2195:17: warning: incorrect type in argument 3 (different base types) fs/btrfs/send.c:2195:17: expected unsigned long long [unsigned] [usertype] value fs/btrfs/send.c:2195:17: got restricted __le64 [usertype] ctransid fs/btrfs/send.c:3716:9: warning: incorrect type in argument 3 (different base types) fs/btrfs/send.c:3716:9: expected unsigned long long [unsigned] [usertype] value fs/btrfs/send.c:3716:9: got restricted __le64 [usertype] ctransid Signed-off-by: Filipe David Borba Manana <fdmanana@gmail.com> Signed-off-by: Josef Bacik <jbacik@fb.com> Signed-off-by: Chris Mason <clm@fb.com>
2013-12-03 15:55:48 +00:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: cleanup unused arguments in send.c sctx is removed from the argument of the function that doesn't use sctx. Signed-off-by: Tsutomu Itoh <t-itoh@jp.fujitsu.com> Signed-off-by: Josef Bacik <jbacik@fusionio.com>
2013-05-08 07:51:52 +00:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
btrfs: add "no file data" flag to btrfs send ioctl This patch adds the flag, BTRFS_SEND_FLAG_NO_FILE_DATA to the btrfs send ioctl code. When this flag is set, the btrfs send code will never write file data into the stream (thus also avoiding expensive reads of that data in the first place). BTRFS_SEND_C_UPDATE_EXTENT commands will be sent (instead of BTRFS_SEND_C_WRITE) with an offset, length pair indicating the extent in question. This patch does not affect the operation of BTRFS_SEND_C_CLONE commands - they will continue to be sent when a search finds an appropriate extent to clone from. Signed-off-by: Mark Fasheh <mfasheh@suse.de> Signed-off-by: Josef Bacik <jbacik@fusionio.com>
2013-02-04 20:54:57 +00:00
Btrfs: cleanup unused arguments in send.c sctx is removed from the argument of the function that doesn't use sctx. Signed-off-by: Tsutomu Itoh <t-itoh@jp.fujitsu.com> Signed-off-by: Josef Bacik <jbacik@fusionio.com>
2013-05-08 07:51:52 +00:00
btrfs: add "no file data" flag to btrfs send ioctl This patch adds the flag, BTRFS_SEND_FLAG_NO_FILE_DATA to the btrfs send ioctl code. When this flag is set, the btrfs send code will never write file data into the stream (thus also avoiding expensive reads of that data in the first place). BTRFS_SEND_C_UPDATE_EXTENT commands will be sent (instead of BTRFS_SEND_C_WRITE) with an offset, length pair indicating the extent in question. This patch does not affect the operation of BTRFS_SEND_C_CLONE commands - they will continue to be sent when a search finds an appropriate extent to clone from. Signed-off-by: Mark Fasheh <mfasheh@suse.de> Signed-off-by: Josef Bacik <jbacik@fusionio.com>
2013-02-04 20:54:57 +00:00
Btrfs: cleanup unused arguments in send.c sctx is removed from the argument of the function that doesn't use sctx. Signed-off-by: Tsutomu Itoh <t-itoh@jp.fujitsu.com> Signed-off-by: Josef Bacik <jbacik@fusionio.com>
2013-05-08 07:51:52 +00:00
btrfs: add "no file data" flag to btrfs send ioctl This patch adds the flag, BTRFS_SEND_FLAG_NO_FILE_DATA to the btrfs send ioctl code. When this flag is set, the btrfs send code will never write file data into the stream (thus also avoiding expensive reads of that data in the first place). BTRFS_SEND_C_UPDATE_EXTENT commands will be sent (instead of BTRFS_SEND_C_WRITE) with an offset, length pair indicating the extent in question. This patch does not affect the operation of BTRFS_SEND_C_CLONE commands - they will continue to be sent when a search finds an appropriate extent to clone from. Signed-off-by: Mark Fasheh <mfasheh@suse.de> Signed-off-by: Josef Bacik <jbacik@fusionio.com>
2013-02-04 20:54:57 +00:00
Btrfs: incompatible format change to remove hole extents Btrfs has always had these filler extent data items for holes in inodes. This has made somethings very easy, like logging hole punches and sending hole punches. However for large holey files these extent data items are pure overhead. So add an incompatible feature to no longer add hole extents to reduce the amount of metadata used by these sort of files. This has a few changes for logging and send obviously since they will need to detect holes and log/send the holes if there are any. I've tested this thoroughly with xfstests and it doesn't cause any issues with and without the incompat format set. Thanks, Signed-off-by: Josef Bacik <jbacik@fusionio.com> Signed-off-by: Chris Mason <clm@fb.com>
2013-10-22 12:18:51 -04:00
Btrfs: send, build path string only once in send_hole There's no point building the path string in each iteration of the send_hole loop, as it produces always the same string. Signed-off-by: Filipe David Borba Manana <fdmanana@gmail.com> Signed-off-by: Chris Mason <clm@fb.com>
2014-03-31 14:52:14 +01:00
Btrfs: incompatible format change to remove hole extents Btrfs has always had these filler extent data items for holes in inodes. This has made somethings very easy, like logging hole punches and sending hole punches. However for large holey files these extent data items are pure overhead. So add an incompatible feature to no longer add hole extents to reduce the amount of metadata used by these sort of files. This has a few changes for logging and send obviously since they will need to detect holes and log/send the holes if there are any. I've tested this thoroughly with xfstests and it doesn't cause any issues with and without the incompat format set. Thanks, Signed-off-by: Josef Bacik <jbacik@fusionio.com> Signed-off-by: Chris Mason <clm@fb.com>
2013-10-22 12:18:51 -04:00
Btrfs: send, fix file corruption due to incorrect cloning operations If we have a file that shares an extent with other files, when processing the extent item relative to a shared extent, we blindly issue a clone operation that will target a length matching the length in the extent item and uses as a source some other file the receiver already has and points to the same extent. However that range in the other file might not exclusively point only to the shared extent, and so using that length will result in the receiver getting a file with different data from the one in the send snapshot. This issue happened both for incremental and full send operations. So fix this by issuing clone operations with lengths that don't cover regions of the source file that point to different extents (or have holes). The following test case for fstests reproduces the problem. seq=`basename $0` seqres=$RESULT_DIR/$seq echo "QA output created by $seq" tmp=/tmp/$$ status=1 # failure is the default! trap "_cleanup; exit \$status" 0 1 2 3 15 _cleanup() { rm -fr $send_files_dir rm -f $tmp.* } # get standard environment, filters and checks . ./common/rc . ./common/filter # real QA test starts here _supported_fs btrfs _supported_os Linux _require_scratch _need_to_be_root _require_cp_reflink _require_xfs_io_command "fpunch" send_files_dir=$TEST_DIR/btrfs-test-$seq rm -f $seqres.full rm -fr $send_files_dir mkdir $send_files_dir _scratch_mkfs >>$seqres.full 2>&1 _scratch_mount # Create our test file with a single 100K extent. $XFS_IO_PROG -f -c "pwrite -S 0xaa 0K 100K" \ $SCRATCH_MNT/foo | _filter_xfs_io # Clone our file into a new file named bar. cp --reflink=always $SCRATCH_MNT/foo $SCRATCH_MNT/bar # Now overwrite parts of our foo file. $XFS_IO_PROG -c "pwrite -S 0xbb 50K 10K" \ -c "pwrite -S 0xcc 90K 10K" \ -c "fpunch 70K 10k" \ $SCRATCH_MNT/foo | _filter_xfs_io _run_btrfs_util_prog subvolume snapshot -r $SCRATCH_MNT \ $SCRATCH_MNT/snap echo "File digests in the original filesystem:" md5sum $SCRATCH_MNT/snap/foo | _filter_scratch md5sum $SCRATCH_MNT/snap/bar | _filter_scratch _run_btrfs_util_prog send $SCRATCH_MNT/snap -f $send_files_dir/1.snap # Now recreate the filesystem by receiving the send stream and verify # we get the same file contents that the original filesystem had. _scratch_unmount _scratch_mkfs >>$seqres.full 2>&1 _scratch_mount _run_btrfs_util_prog receive $SCRATCH_MNT -f $send_files_dir/1.snap # We expect the destination filesystem to have exactly the same file # data as the original filesystem. # The btrfs send implementation had a bug where it sent a clone # operation from file foo into file bar covering the whole [0, 100K[ # range after creating and writing the file foo. This was incorrect # because the file bar now included the updates done to file foo after # we cloned foo to bar, breaking the COW nature of reflink copies # (cloned extents). echo "File digests in the new filesystem:" md5sum $SCRATCH_MNT/snap/foo | _filter_scratch md5sum $SCRATCH_MNT/snap/bar | _filter_scratch status=0 exit Another test case that reproduces the problem when we have compressed extents: seq=`basename $0` seqres=$RESULT_DIR/$seq echo "QA output created by $seq" tmp=/tmp/$$ status=1 # failure is the default! trap "_cleanup; exit \$status" 0 1 2 3 15 _cleanup() { rm -fr $send_files_dir rm -f $tmp.* } # get standard environment, filters and checks . ./common/rc . ./common/filter # real QA test starts here _supported_fs btrfs _supported_os Linux _require_scratch _need_to_be_root _require_cp_reflink send_files_dir=$TEST_DIR/btrfs-test-$seq rm -f $seqres.full rm -fr $send_files_dir mkdir $send_files_dir _scratch_mkfs >>$seqres.full 2>&1 _scratch_mount "-o compress" # Create our file with an extent of 100K starting at file offset 0K. $XFS_IO_PROG -f -c "pwrite -S 0xaa 0K 100K" \ -c "fsync" \ $SCRATCH_MNT/foo | _filter_xfs_io # Rewrite part of the previous extent (its first 40K) and write a new # 100K extent starting at file offset 100K. $XFS_IO_PROG -c "pwrite -S 0xbb 0K 40K" \ -c "pwrite -S 0xcc 100K 100K" \ $SCRATCH_MNT/foo | _filter_xfs_io # Our file foo now has 3 file extent items in its metadata: # # 1) One covering the file range 0 to 40K; # 2) One covering the file range 40K to 100K, which points to the first # extent we wrote to the file and has a data offset field with value # 40K (our file no longer uses the first 40K of data from that # extent); # 3) One covering the file range 100K to 200K. # Now clone our file foo into file bar. cp --reflink=always $SCRATCH_MNT/foo $SCRATCH_MNT/bar # Create our snapshot for the send operation. _run_btrfs_util_prog subvolume snapshot -r $SCRATCH_MNT \ $SCRATCH_MNT/snap echo "File digests in the original filesystem:" md5sum $SCRATCH_MNT/snap/foo | _filter_scratch md5sum $SCRATCH_MNT/snap/bar | _filter_scratch _run_btrfs_util_prog send $SCRATCH_MNT/snap -f $send_files_dir/1.snap # Now recreate the filesystem by receiving the send stream and verify we # get the same file contents that the original filesystem had. # Btrfs send used to issue a clone operation from foo's range # [80K, 140K[ to bar's range [40K, 100K[ when cloning the extent pointed # to by foo's second file extent item, this was incorrect because of bad # accounting of the file extent item's data offset field. The correct # range to clone from should have been [40K, 100K[. _scratch_unmount _scratch_mkfs >>$seqres.full 2>&1 _scratch_mount "-o compress" _run_btrfs_util_prog receive $SCRATCH_MNT -f $send_files_dir/1.snap echo "File digests in the new filesystem:" # Must match the digests we got in the original filesystem. md5sum $SCRATCH_MNT/snap/foo | _filter_scratch md5sum $SCRATCH_MNT/snap/bar | _filter_scratch status=0 exit Signed-off-by: Filipe Manana <fdmanana@suse.com>
2015-10-02 10:47:34 +01:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: fix send to not send non-aligned clone operations It is possible for the send feature to send clone operations that request a cloning range (offset + length) that is not aligned with the block size. This makes the btrfs receive command send issue a clone ioctl call that will fail, as the ioctl will return an -EINVAL error because of the unaligned range. Fix this by not sending clone operations for non block aligned ranges, and instead send regular write operation for these (less common) cases. The following xfstest reproduces this issue, which fails on the second btrfs receive command without this change: seq=`basename $0` seqres=$RESULT_DIR/$seq echo "QA output created by $seq" tmp=`mktemp -d` status=1 # failure is the default! trap "_cleanup; exit \$status" 0 1 2 3 15 _cleanup() { rm -fr $tmp } # get standard environment, filters and checks . ./common/rc . ./common/filter # real QA test starts here _supported_fs btrfs _supported_os Linux _require_scratch _need_to_be_root rm -f $seqres.full _scratch_mkfs >/dev/null 2>&1 _scratch_mount $XFS_IO_PROG -f -c "truncate 819200" $SCRATCH_MNT/foo | _filter_xfs_io $BTRFS_UTIL_PROG filesystem sync $SCRATCH_MNT | _filter_scratch $XFS_IO_PROG -c "falloc -k 819200 667648" $SCRATCH_MNT/foo | _filter_xfs_io $BTRFS_UTIL_PROG filesystem sync $SCRATCH_MNT | _filter_scratch $XFS_IO_PROG -f -c "pwrite 1482752 2978" $SCRATCH_MNT/foo | _filter_xfs_io $BTRFS_UTIL_PROG filesystem sync $SCRATCH_MNT | _filter_scratch $BTRFS_UTIL_PROG subvol snapshot -r $SCRATCH_MNT $SCRATCH_MNT/mysnap1 | \ _filter_scratch $XFS_IO_PROG -f -c "truncate 883305" $SCRATCH_MNT/foo | _filter_xfs_io $BTRFS_UTIL_PROG filesystem sync $SCRATCH_MNT | _filter_scratch $BTRFS_UTIL_PROG subvol snapshot -r $SCRATCH_MNT $SCRATCH_MNT/mysnap2 | \ _filter_scratch $BTRFS_UTIL_PROG send $SCRATCH_MNT/mysnap1 -f $tmp/1.snap 2>&1 | _filter_scratch $BTRFS_UTIL_PROG send -p $SCRATCH_MNT/mysnap1 $SCRATCH_MNT/mysnap2 \ -f $tmp/2.snap 2>&1 | _filter_scratch md5sum $SCRATCH_MNT/foo | _filter_scratch md5sum $SCRATCH_MNT/mysnap1/foo | _filter_scratch md5sum $SCRATCH_MNT/mysnap2/foo | _filter_scratch _scratch_unmount _check_btrfs_filesystem $SCRATCH_DEV _scratch_mkfs >/dev/null 2>&1 _scratch_mount $BTRFS_UTIL_PROG receive $SCRATCH_MNT -f $tmp/1.snap md5sum $SCRATCH_MNT/mysnap1/foo | _filter_scratch $BTRFS_UTIL_PROG receive $SCRATCH_MNT -f $tmp/2.snap md5sum $SCRATCH_MNT/mysnap2/foo | _filter_scratch _scratch_unmount _check_btrfs_filesystem $SCRATCH_DEV status=0 exit The tests expected output is: QA output created by 025 FSSync 'SCRATCH_MNT' FSSync 'SCRATCH_MNT' wrote 2978/2978 bytes at offset 1482752 XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) FSSync 'SCRATCH_MNT' Create a readonly snapshot of 'SCRATCH_MNT' in 'SCRATCH_MNT/mysnap1' FSSync 'SCRATCH_MNT' Create a readonly snapshot of 'SCRATCH_MNT' in 'SCRATCH_MNT/mysnap2' At subvol SCRATCH_MNT/mysnap1 At subvol SCRATCH_MNT/mysnap2 129b8eaee8d3c2bcad49bec596591cb3 SCRATCH_MNT/foo 42b6369eae2a8725c1aacc0440e597aa SCRATCH_MNT/mysnap1/foo 129b8eaee8d3c2bcad49bec596591cb3 SCRATCH_MNT/mysnap2/foo At subvol mysnap1 42b6369eae2a8725c1aacc0440e597aa SCRATCH_MNT/mysnap1/foo At snapshot mysnap2 129b8eaee8d3c2bcad49bec596591cb3 SCRATCH_MNT/mysnap2/foo Signed-off-by: Filipe David Borba Manana <fdmanana@gmail.com> Signed-off-by: Josef Bacik <jbacik@fb.com> Signed-off-by: Chris Mason <clm@fb.com>
2014-01-12 02:26:28 +00:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: fix btrfs send for inline items and compression The btrfs send code was assuming the offset of the file item into the extent translated to bytes on disk. If we're compressed, this isn't true, and so it was off into extents owned by other files. It was also improperly handling inline extents. This solves a crash where we may have gone past the end of the file extent item by not testing early enough for an inline extent. It also solves problems where we have a whole between the end of the inline item and the start of the full extent. Signed-off-by: Chris Mason <chris.mason@fusionio.com>
2012-08-07 16:25:13 -04:00
Btrfs: don't use ram_bytes for uncompressed inline items If we truncate an uncompressed inline item, ram_bytes isn't updated to reflect the new size. The fixe uses the size directly from the item header when reading uncompressed inlines, and also fixes truncate to update the size as it goes. Reported-by: Jens Axboe <axboe@fb.com> Signed-off-by: Chris Mason <clm@fb.com> CC: stable@vger.kernel.org
2014-01-03 21:07:00 -08:00
Btrfs: fix btrfs send for inline items and compression The btrfs send code was assuming the offset of the file item into the extent translated to bytes on disk. If we're compressed, this isn't true, and so it was off into extents owned by other files. It was also improperly handling inline extents. This solves a crash where we may have gone past the end of the file extent item by not testing early enough for an inline extent. It also solves problems where we have a whole between the end of the inline item and the start of the full extent. Signed-off-by: Chris Mason <chris.mason@fusionio.com>
2012-08-07 16:25:13 -04:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: fix btrfs send for inline items and compression The btrfs send code was assuming the offset of the file item into the extent translated to bytes on disk. If we're compressed, this isn't true, and so it was off into extents owned by other files. It was also improperly handling inline extents. This solves a crash where we may have gone past the end of the file extent item by not testing early enough for an inline extent. It also solves problems where we have a whole between the end of the inline item and the start of the full extent. Signed-off-by: Chris Mason <chris.mason@fusionio.com>
2012-08-07 16:25:13 -04:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: fix send to not send non-aligned clone operations It is possible for the send feature to send clone operations that request a cloning range (offset + length) that is not aligned with the block size. This makes the btrfs receive command send issue a clone ioctl call that will fail, as the ioctl will return an -EINVAL error because of the unaligned range. Fix this by not sending clone operations for non block aligned ranges, and instead send regular write operation for these (less common) cases. The following xfstest reproduces this issue, which fails on the second btrfs receive command without this change: seq=`basename $0` seqres=$RESULT_DIR/$seq echo "QA output created by $seq" tmp=`mktemp -d` status=1 # failure is the default! trap "_cleanup; exit \$status" 0 1 2 3 15 _cleanup() { rm -fr $tmp } # get standard environment, filters and checks . ./common/rc . ./common/filter # real QA test starts here _supported_fs btrfs _supported_os Linux _require_scratch _need_to_be_root rm -f $seqres.full _scratch_mkfs >/dev/null 2>&1 _scratch_mount $XFS_IO_PROG -f -c "truncate 819200" $SCRATCH_MNT/foo | _filter_xfs_io $BTRFS_UTIL_PROG filesystem sync $SCRATCH_MNT | _filter_scratch $XFS_IO_PROG -c "falloc -k 819200 667648" $SCRATCH_MNT/foo | _filter_xfs_io $BTRFS_UTIL_PROG filesystem sync $SCRATCH_MNT | _filter_scratch $XFS_IO_PROG -f -c "pwrite 1482752 2978" $SCRATCH_MNT/foo | _filter_xfs_io $BTRFS_UTIL_PROG filesystem sync $SCRATCH_MNT | _filter_scratch $BTRFS_UTIL_PROG subvol snapshot -r $SCRATCH_MNT $SCRATCH_MNT/mysnap1 | \ _filter_scratch $XFS_IO_PROG -f -c "truncate 883305" $SCRATCH_MNT/foo | _filter_xfs_io $BTRFS_UTIL_PROG filesystem sync $SCRATCH_MNT | _filter_scratch $BTRFS_UTIL_PROG subvol snapshot -r $SCRATCH_MNT $SCRATCH_MNT/mysnap2 | \ _filter_scratch $BTRFS_UTIL_PROG send $SCRATCH_MNT/mysnap1 -f $tmp/1.snap 2>&1 | _filter_scratch $BTRFS_UTIL_PROG send -p $SCRATCH_MNT/mysnap1 $SCRATCH_MNT/mysnap2 \ -f $tmp/2.snap 2>&1 | _filter_scratch md5sum $SCRATCH_MNT/foo | _filter_scratch md5sum $SCRATCH_MNT/mysnap1/foo | _filter_scratch md5sum $SCRATCH_MNT/mysnap2/foo | _filter_scratch _scratch_unmount _check_btrfs_filesystem $SCRATCH_DEV _scratch_mkfs >/dev/null 2>&1 _scratch_mount $BTRFS_UTIL_PROG receive $SCRATCH_MNT -f $tmp/1.snap md5sum $SCRATCH_MNT/mysnap1/foo | _filter_scratch $BTRFS_UTIL_PROG receive $SCRATCH_MNT -f $tmp/2.snap md5sum $SCRATCH_MNT/mysnap2/foo | _filter_scratch _scratch_unmount _check_btrfs_filesystem $SCRATCH_DEV status=0 exit The tests expected output is: QA output created by 025 FSSync 'SCRATCH_MNT' FSSync 'SCRATCH_MNT' wrote 2978/2978 bytes at offset 1482752 XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) FSSync 'SCRATCH_MNT' Create a readonly snapshot of 'SCRATCH_MNT' in 'SCRATCH_MNT/mysnap1' FSSync 'SCRATCH_MNT' Create a readonly snapshot of 'SCRATCH_MNT' in 'SCRATCH_MNT/mysnap2' At subvol SCRATCH_MNT/mysnap1 At subvol SCRATCH_MNT/mysnap2 129b8eaee8d3c2bcad49bec596591cb3 SCRATCH_MNT/foo 42b6369eae2a8725c1aacc0440e597aa SCRATCH_MNT/mysnap1/foo 129b8eaee8d3c2bcad49bec596591cb3 SCRATCH_MNT/mysnap2/foo At subvol mysnap1 42b6369eae2a8725c1aacc0440e597aa SCRATCH_MNT/mysnap1/foo At snapshot mysnap2 129b8eaee8d3c2bcad49bec596591cb3 SCRATCH_MNT/mysnap2/foo Signed-off-by: Filipe David Borba Manana <fdmanana@gmail.com> Signed-off-by: Josef Bacik <jbacik@fb.com> Signed-off-by: Chris Mason <clm@fb.com>
2014-01-12 02:26:28 +00:00
Btrfs: send, fix file corruption due to incorrect cloning operations If we have a file that shares an extent with other files, when processing the extent item relative to a shared extent, we blindly issue a clone operation that will target a length matching the length in the extent item and uses as a source some other file the receiver already has and points to the same extent. However that range in the other file might not exclusively point only to the shared extent, and so using that length will result in the receiver getting a file with different data from the one in the send snapshot. This issue happened both for incremental and full send operations. So fix this by issuing clone operations with lengths that don't cover regions of the source file that point to different extents (or have holes). The following test case for fstests reproduces the problem. seq=`basename $0` seqres=$RESULT_DIR/$seq echo "QA output created by $seq" tmp=/tmp/$$ status=1 # failure is the default! trap "_cleanup; exit \$status" 0 1 2 3 15 _cleanup() { rm -fr $send_files_dir rm -f $tmp.* } # get standard environment, filters and checks . ./common/rc . ./common/filter # real QA test starts here _supported_fs btrfs _supported_os Linux _require_scratch _need_to_be_root _require_cp_reflink _require_xfs_io_command "fpunch" send_files_dir=$TEST_DIR/btrfs-test-$seq rm -f $seqres.full rm -fr $send_files_dir mkdir $send_files_dir _scratch_mkfs >>$seqres.full 2>&1 _scratch_mount # Create our test file with a single 100K extent. $XFS_IO_PROG -f -c "pwrite -S 0xaa 0K 100K" \ $SCRATCH_MNT/foo | _filter_xfs_io # Clone our file into a new file named bar. cp --reflink=always $SCRATCH_MNT/foo $SCRATCH_MNT/bar # Now overwrite parts of our foo file. $XFS_IO_PROG -c "pwrite -S 0xbb 50K 10K" \ -c "pwrite -S 0xcc 90K 10K" \ -c "fpunch 70K 10k" \ $SCRATCH_MNT/foo | _filter_xfs_io _run_btrfs_util_prog subvolume snapshot -r $SCRATCH_MNT \ $SCRATCH_MNT/snap echo "File digests in the original filesystem:" md5sum $SCRATCH_MNT/snap/foo | _filter_scratch md5sum $SCRATCH_MNT/snap/bar | _filter_scratch _run_btrfs_util_prog send $SCRATCH_MNT/snap -f $send_files_dir/1.snap # Now recreate the filesystem by receiving the send stream and verify # we get the same file contents that the original filesystem had. _scratch_unmount _scratch_mkfs >>$seqres.full 2>&1 _scratch_mount _run_btrfs_util_prog receive $SCRATCH_MNT -f $send_files_dir/1.snap # We expect the destination filesystem to have exactly the same file # data as the original filesystem. # The btrfs send implementation had a bug where it sent a clone # operation from file foo into file bar covering the whole [0, 100K[ # range after creating and writing the file foo. This was incorrect # because the file bar now included the updates done to file foo after # we cloned foo to bar, breaking the COW nature of reflink copies # (cloned extents). echo "File digests in the new filesystem:" md5sum $SCRATCH_MNT/snap/foo | _filter_scratch md5sum $SCRATCH_MNT/snap/bar | _filter_scratch status=0 exit Another test case that reproduces the problem when we have compressed extents: seq=`basename $0` seqres=$RESULT_DIR/$seq echo "QA output created by $seq" tmp=/tmp/$$ status=1 # failure is the default! trap "_cleanup; exit \$status" 0 1 2 3 15 _cleanup() { rm -fr $send_files_dir rm -f $tmp.* } # get standard environment, filters and checks . ./common/rc . ./common/filter # real QA test starts here _supported_fs btrfs _supported_os Linux _require_scratch _need_to_be_root _require_cp_reflink send_files_dir=$TEST_DIR/btrfs-test-$seq rm -f $seqres.full rm -fr $send_files_dir mkdir $send_files_dir _scratch_mkfs >>$seqres.full 2>&1 _scratch_mount "-o compress" # Create our file with an extent of 100K starting at file offset 0K. $XFS_IO_PROG -f -c "pwrite -S 0xaa 0K 100K" \ -c "fsync" \ $SCRATCH_MNT/foo | _filter_xfs_io # Rewrite part of the previous extent (its first 40K) and write a new # 100K extent starting at file offset 100K. $XFS_IO_PROG -c "pwrite -S 0xbb 0K 40K" \ -c "pwrite -S 0xcc 100K 100K" \ $SCRATCH_MNT/foo | _filter_xfs_io # Our file foo now has 3 file extent items in its metadata: # # 1) One covering the file range 0 to 40K; # 2) One covering the file range 40K to 100K, which points to the first # extent we wrote to the file and has a data offset field with value # 40K (our file no longer uses the first 40K of data from that # extent); # 3) One covering the file range 100K to 200K. # Now clone our file foo into file bar. cp --reflink=always $SCRATCH_MNT/foo $SCRATCH_MNT/bar # Create our snapshot for the send operation. _run_btrfs_util_prog subvolume snapshot -r $SCRATCH_MNT \ $SCRATCH_MNT/snap echo "File digests in the original filesystem:" md5sum $SCRATCH_MNT/snap/foo | _filter_scratch md5sum $SCRATCH_MNT/snap/bar | _filter_scratch _run_btrfs_util_prog send $SCRATCH_MNT/snap -f $send_files_dir/1.snap # Now recreate the filesystem by receiving the send stream and verify we # get the same file contents that the original filesystem had. # Btrfs send used to issue a clone operation from foo's range # [80K, 140K[ to bar's range [40K, 100K[ when cloning the extent pointed # to by foo's second file extent item, this was incorrect because of bad # accounting of the file extent item's data offset field. The correct # range to clone from should have been [40K, 100K[. _scratch_unmount _scratch_mkfs >>$seqres.full 2>&1 _scratch_mount "-o compress" _run_btrfs_util_prog receive $SCRATCH_MNT -f $send_files_dir/1.snap echo "File digests in the new filesystem:" # Must match the digests we got in the original filesystem. md5sum $SCRATCH_MNT/snap/foo | _filter_scratch md5sum $SCRATCH_MNT/snap/bar | _filter_scratch status=0 exit Signed-off-by: Filipe Manana <fdmanana@suse.com>
2015-10-02 10:47:34 +01:00
btrfs: add "no file data" flag to btrfs send ioctl This patch adds the flag, BTRFS_SEND_FLAG_NO_FILE_DATA to the btrfs send ioctl code. When this flag is set, the btrfs send code will never write file data into the stream (thus also avoiding expensive reads of that data in the first place). BTRFS_SEND_C_UPDATE_EXTENT commands will be sent (instead of BTRFS_SEND_C_WRITE) with an offset, length pair indicating the extent in question. This patch does not affect the operation of BTRFS_SEND_C_CLONE commands - they will continue to be sent when a search finds an appropriate extent to clone from. Signed-off-by: Mark Fasheh <mfasheh@suse.de> Signed-off-by: Josef Bacik <jbacik@fusionio.com>
2013-02-04 20:54:57 +00:00
Btrfs: send, fix file corruption due to incorrect cloning operations If we have a file that shares an extent with other files, when processing the extent item relative to a shared extent, we blindly issue a clone operation that will target a length matching the length in the extent item and uses as a source some other file the receiver already has and points to the same extent. However that range in the other file might not exclusively point only to the shared extent, and so using that length will result in the receiver getting a file with different data from the one in the send snapshot. This issue happened both for incremental and full send operations. So fix this by issuing clone operations with lengths that don't cover regions of the source file that point to different extents (or have holes). The following test case for fstests reproduces the problem. seq=`basename $0` seqres=$RESULT_DIR/$seq echo "QA output created by $seq" tmp=/tmp/$$ status=1 # failure is the default! trap "_cleanup; exit \$status" 0 1 2 3 15 _cleanup() { rm -fr $send_files_dir rm -f $tmp.* } # get standard environment, filters and checks . ./common/rc . ./common/filter # real QA test starts here _supported_fs btrfs _supported_os Linux _require_scratch _need_to_be_root _require_cp_reflink _require_xfs_io_command "fpunch" send_files_dir=$TEST_DIR/btrfs-test-$seq rm -f $seqres.full rm -fr $send_files_dir mkdir $send_files_dir _scratch_mkfs >>$seqres.full 2>&1 _scratch_mount # Create our test file with a single 100K extent. $XFS_IO_PROG -f -c "pwrite -S 0xaa 0K 100K" \ $SCRATCH_MNT/foo | _filter_xfs_io # Clone our file into a new file named bar. cp --reflink=always $SCRATCH_MNT/foo $SCRATCH_MNT/bar # Now overwrite parts of our foo file. $XFS_IO_PROG -c "pwrite -S 0xbb 50K 10K" \ -c "pwrite -S 0xcc 90K 10K" \ -c "fpunch 70K 10k" \ $SCRATCH_MNT/foo | _filter_xfs_io _run_btrfs_util_prog subvolume snapshot -r $SCRATCH_MNT \ $SCRATCH_MNT/snap echo "File digests in the original filesystem:" md5sum $SCRATCH_MNT/snap/foo | _filter_scratch md5sum $SCRATCH_MNT/snap/bar | _filter_scratch _run_btrfs_util_prog send $SCRATCH_MNT/snap -f $send_files_dir/1.snap # Now recreate the filesystem by receiving the send stream and verify # we get the same file contents that the original filesystem had. _scratch_unmount _scratch_mkfs >>$seqres.full 2>&1 _scratch_mount _run_btrfs_util_prog receive $SCRATCH_MNT -f $send_files_dir/1.snap # We expect the destination filesystem to have exactly the same file # data as the original filesystem. # The btrfs send implementation had a bug where it sent a clone # operation from file foo into file bar covering the whole [0, 100K[ # range after creating and writing the file foo. This was incorrect # because the file bar now included the updates done to file foo after # we cloned foo to bar, breaking the COW nature of reflink copies # (cloned extents). echo "File digests in the new filesystem:" md5sum $SCRATCH_MNT/snap/foo | _filter_scratch md5sum $SCRATCH_MNT/snap/bar | _filter_scratch status=0 exit Another test case that reproduces the problem when we have compressed extents: seq=`basename $0` seqres=$RESULT_DIR/$seq echo "QA output created by $seq" tmp=/tmp/$$ status=1 # failure is the default! trap "_cleanup; exit \$status" 0 1 2 3 15 _cleanup() { rm -fr $send_files_dir rm -f $tmp.* } # get standard environment, filters and checks . ./common/rc . ./common/filter # real QA test starts here _supported_fs btrfs _supported_os Linux _require_scratch _need_to_be_root _require_cp_reflink send_files_dir=$TEST_DIR/btrfs-test-$seq rm -f $seqres.full rm -fr $send_files_dir mkdir $send_files_dir _scratch_mkfs >>$seqres.full 2>&1 _scratch_mount "-o compress" # Create our file with an extent of 100K starting at file offset 0K. $XFS_IO_PROG -f -c "pwrite -S 0xaa 0K 100K" \ -c "fsync" \ $SCRATCH_MNT/foo | _filter_xfs_io # Rewrite part of the previous extent (its first 40K) and write a new # 100K extent starting at file offset 100K. $XFS_IO_PROG -c "pwrite -S 0xbb 0K 40K" \ -c "pwrite -S 0xcc 100K 100K" \ $SCRATCH_MNT/foo | _filter_xfs_io # Our file foo now has 3 file extent items in its metadata: # # 1) One covering the file range 0 to 40K; # 2) One covering the file range 40K to 100K, which points to the first # extent we wrote to the file and has a data offset field with value # 40K (our file no longer uses the first 40K of data from that # extent); # 3) One covering the file range 100K to 200K. # Now clone our file foo into file bar. cp --reflink=always $SCRATCH_MNT/foo $SCRATCH_MNT/bar # Create our snapshot for the send operation. _run_btrfs_util_prog subvolume snapshot -r $SCRATCH_MNT \ $SCRATCH_MNT/snap echo "File digests in the original filesystem:" md5sum $SCRATCH_MNT/snap/foo | _filter_scratch md5sum $SCRATCH_MNT/snap/bar | _filter_scratch _run_btrfs_util_prog send $SCRATCH_MNT/snap -f $send_files_dir/1.snap # Now recreate the filesystem by receiving the send stream and verify we # get the same file contents that the original filesystem had. # Btrfs send used to issue a clone operation from foo's range # [80K, 140K[ to bar's range [40K, 100K[ when cloning the extent pointed # to by foo's second file extent item, this was incorrect because of bad # accounting of the file extent item's data offset field. The correct # range to clone from should have been [40K, 100K[. _scratch_unmount _scratch_mkfs >>$seqres.full 2>&1 _scratch_mount "-o compress" _run_btrfs_util_prog receive $SCRATCH_MNT -f $send_files_dir/1.snap echo "File digests in the new filesystem:" # Must match the digests we got in the original filesystem. md5sum $SCRATCH_MNT/snap/foo | _filter_scratch md5sum $SCRATCH_MNT/snap/bar | _filter_scratch status=0 exit Signed-off-by: Filipe Manana <fdmanana@suse.com>
2015-10-02 10:47:34 +01:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: fix btrfs send for inline items and compression The btrfs send code was assuming the offset of the file item into the extent translated to bytes on disk. If we're compressed, this isn't true, and so it was off into extents owned by other files. It was also improperly handling inline extents. This solves a crash where we may have gone past the end of the file extent item by not testing early enough for an inline extent. It also solves problems where we have a whole between the end of the inline item and the start of the full extent. Signed-off-by: Chris Mason <chris.mason@fusionio.com>
2012-08-07 16:25:13 -04:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: fix btrfs send for inline items and compression The btrfs send code was assuming the offset of the file item into the extent translated to bytes on disk. If we're compressed, this isn't true, and so it was off into extents owned by other files. It was also improperly handling inline extents. This solves a crash where we may have gone past the end of the file extent item by not testing early enough for an inline extent. It also solves problems where we have a whole between the end of the inline item and the start of the full extent. Signed-off-by: Chris Mason <chris.mason@fusionio.com>
2012-08-07 16:25:13 -04:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: fix send to deal with sparse files properly Send was just sending everything it found, even if the extent was a hole. This is unpleasant for users, so just skip holes when we are sending. This will also skip sending prealloc extents since the send spec doesn't have a prealloc command. Eventually we will add a prealloc command and rev the send version so we can send down the prealloc info. Thanks, Signed-off-by: Josef Bacik <jbacik@fusionio.com> Signed-off-by: Chris Mason <chris.mason@fusionio.com>
2013-08-20 15:55:39 -04:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: check file extent type before anything else I hit this problem with my no holes patch and it made me realize what the problem was for bz 60834. If the first item in the leaf is an inline extent and we try to read anything starting from disk_bytenr onward we will read off the end of the leaf. So we need to check to see what it's type is, and if it's not REG we can just break out. This should fix this problem. Thanks, Signed-off-by: Josef Bacik <jbacik@fusionio.com> Signed-off-by: Chris Mason <chris.mason@fusionio.com>
2013-10-31 16:49:02 -04:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: use <= instead of < in is_extent_unchanged Used the wrong compare operator here. Reported-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com> Signed-off-by: Alexander Block <ablock84@googlemail.com>
2012-08-01 12:49:15 +02:00
Btrfs: fix send to deal with sparse files properly Send was just sending everything it found, even if the extent was a hole. This is unpleasant for users, so just skip holes when we are sending. This will also skip sending prealloc extents since the send spec doesn't have a prealloc command. Eventually we will add a prealloc command and rev the send version so we can send down the prealloc info. Thanks, Signed-off-by: Josef Bacik <jbacik@fusionio.com> Signed-off-by: Chris Mason <chris.mason@fusionio.com>
2013-08-20 15:55:39 -04:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: fix check for changed extent in is_extent_unchanged The previous check was working fine, but this check should be easier to read. Also, we could theoritically have some exotic bugs with the previous checks. Signed-off-by: Alexander Block <ablock84@googlemail.com>
2012-08-01 12:46:05 +02:00
Btrfs: fix btrfs send for inline items and compression The btrfs send code was assuming the offset of the file item into the extent translated to bytes on disk. If we're compressed, this isn't true, and so it was off into extents owned by other files. It was also improperly handling inline extents. This solves a crash where we may have gone past the end of the file extent item by not testing early enough for an inline extent. It also solves problems where we have a whole between the end of the inline item and the start of the full extent. Signed-off-by: Chris Mason <chris.mason@fusionio.com>
2012-08-07 16:25:13 -04:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: fix EIO from btrfs send in is_extent_unchanged for punched holes When you take a snapshot, punch a hole where there has been data, then take another snapshot and try to send an incremental stream, btrfs send would give you EIO. That is because is_extent_unchanged had no support for holes being punched. With this patch, instead of returning EIO we just return 0 (== the extent is not unchanged) and we're good. Signed-off-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Cc: Alexander Block <ablock84@gmail.com> Signed-off-by: Josef Bacik <jbacik@fusionio.com>
2013-03-21 14:30:23 +00:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: incompatible format change to remove hole extents Btrfs has always had these filler extent data items for holes in inodes. This has made somethings very easy, like logging hole punches and sending hole punches. However for large holey files these extent data items are pure overhead. So add an incompatible feature to no longer add hole extents to reduce the amount of metadata used by these sort of files. This has a few changes for logging and send obviously since they will need to detect holes and log/send the holes if there are any. I've tested this thoroughly with xfstests and it doesn't cause any issues with and without the incompat format set. Thanks, Signed-off-by: Josef Bacik <jbacik@fusionio.com> Signed-off-by: Chris Mason <clm@fb.com>
2013-10-22 12:18:51 -04:00
Btrfs: don't use ram_bytes for uncompressed inline items If we truncate an uncompressed inline item, ram_bytes isn't updated to reflect the new size. The fixe uses the size directly from the item header when reading uncompressed inlines, and also fixes truncate to update the size as it goes. Reported-by: Jens Axboe <axboe@fb.com> Signed-off-by: Chris Mason <clm@fb.com> CC: stable@vger.kernel.org
2014-01-03 21:07:00 -08:00
Btrfs: incompatible format change to remove hole extents Btrfs has always had these filler extent data items for holes in inodes. This has made somethings very easy, like logging hole punches and sending hole punches. However for large holey files these extent data items are pure overhead. So add an incompatible feature to no longer add hole extents to reduce the amount of metadata used by these sort of files. This has a few changes for logging and send obviously since they will need to detect holes and log/send the holes if there are any. I've tested this thoroughly with xfstests and it doesn't cause any issues with and without the incompat format set. Thanks, Signed-off-by: Josef Bacik <jbacik@fusionio.com> Signed-off-by: Chris Mason <clm@fb.com>
2013-10-22 12:18:51 -04:00
Btrfs: don't use ram_bytes for uncompressed inline items If we truncate an uncompressed inline item, ram_bytes isn't updated to reflect the new size. The fixe uses the size directly from the item header when reading uncompressed inlines, and also fixes truncate to update the size as it goes. Reported-by: Jens Axboe <axboe@fb.com> Signed-off-by: Chris Mason <clm@fb.com> CC: stable@vger.kernel.org
2014-01-03 21:07:00 -08:00
Btrfs: incompatible format change to remove hole extents Btrfs has always had these filler extent data items for holes in inodes. This has made somethings very easy, like logging hole punches and sending hole punches. However for large holey files these extent data items are pure overhead. So add an incompatible feature to no longer add hole extents to reduce the amount of metadata used by these sort of files. This has a few changes for logging and send obviously since they will need to detect holes and log/send the holes if there are any. I've tested this thoroughly with xfstests and it doesn't cause any issues with and without the incompat format set. Thanks, Signed-off-by: Josef Bacik <jbacik@fusionio.com> Signed-off-by: Chris Mason <clm@fb.com>
2013-10-22 12:18:51 -04:00
Btrfs: fix send file hole detection leading to data corruption There was a case where file hole detection was incorrect and it would cause an incremental send to override a section of a file with zeroes. This happened in the case where between the last leaf we processed which contained a file extent item for our current inode and the leaf we're currently are at (and has a file extent item for our current inode) there are only leafs containing exclusively file extent items for our current inode, and none of them was updated since the previous send operation. The file hole detection code would incorrectly consider the file range covered by these leafs as a hole. A test case for xfstests follows soon. Signed-off-by: Filipe David Borba Manana <fdmanana@gmail.com> Signed-off-by: Josef Bacik <jbacik@fb.com> Signed-off-by: Chris Mason <clm@fb.com>
2014-01-28 01:38:06 +00:00
Btrfs: incompatible format change to remove hole extents Btrfs has always had these filler extent data items for holes in inodes. This has made somethings very easy, like logging hole punches and sending hole punches. However for large holey files these extent data items are pure overhead. So add an incompatible feature to no longer add hole extents to reduce the amount of metadata used by these sort of files. This has a few changes for logging and send obviously since they will need to detect holes and log/send the holes if there are any. I've tested this thoroughly with xfstests and it doesn't cause any issues with and without the incompat format set. Thanks, Signed-off-by: Josef Bacik <jbacik@fusionio.com> Signed-off-by: Chris Mason <clm@fb.com>
2013-10-22 12:18:51 -04:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: fix send to deal with sparse files properly Send was just sending everything it found, even if the extent was a hole. This is unpleasant for users, so just skip holes when we are sending. This will also skip sending prealloc extents since the send spec doesn't have a prealloc command. Eventually we will add a prealloc command and rev the send version so we can send down the prealloc info. Thanks, Signed-off-by: Josef Bacik <jbacik@fusionio.com> Signed-off-by: Chris Mason <chris.mason@fusionio.com>
2013-08-20 15:55:39 -04:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: incompatible format change to remove hole extents Btrfs has always had these filler extent data items for holes in inodes. This has made somethings very easy, like logging hole punches and sending hole punches. However for large holey files these extent data items are pure overhead. So add an incompatible feature to no longer add hole extents to reduce the amount of metadata used by these sort of files. This has a few changes for logging and send obviously since they will need to detect holes and log/send the holes if there are any. I've tested this thoroughly with xfstests and it doesn't cause any issues with and without the incompat format set. Thanks, Signed-off-by: Josef Bacik <jbacik@fusionio.com> Signed-off-by: Chris Mason <clm@fb.com>
2013-10-22 12:18:51 -04:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: fix send to deal with sparse files properly Send was just sending everything it found, even if the extent was a hole. This is unpleasant for users, so just skip holes when we are sending. This will also skip sending prealloc extents since the send spec doesn't have a prealloc command. Eventually we will add a prealloc command and rev the send version so we can send down the prealloc info. Thanks, Signed-off-by: Josef Bacik <jbacik@fusionio.com> Signed-off-by: Chris Mason <chris.mason@fusionio.com>
2013-08-20 15:55:39 -04:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: incompatible format change to remove hole extents Btrfs has always had these filler extent data items for holes in inodes. This has made somethings very easy, like logging hole punches and sending hole punches. However for large holey files these extent data items are pure overhead. So add an incompatible feature to no longer add hole extents to reduce the amount of metadata used by these sort of files. This has a few changes for logging and send obviously since they will need to detect holes and log/send the holes if there are any. I've tested this thoroughly with xfstests and it doesn't cause any issues with and without the incompat format set. Thanks, Signed-off-by: Josef Bacik <jbacik@fusionio.com> Signed-off-by: Chris Mason <clm@fb.com>
2013-10-22 12:18:51 -04:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: make send's file extent item search more efficient Instead of looking for a file extent item, process it, release the path and do a btree search for the next file extent item, just process all file extent items in a leaf without intermediate btree searches. This way we save cpu and we're not blocking other tasks or affecting concurrency on the btree, because send's paths use the commit root and skip btree node/leaf locking. Signed-off-by: Filipe David Borba Manana <fdmanana@gmail.com> Signed-off-by: Josef Bacik <jbacik@fb.com> Signed-off-by: Chris Mason <clm@fb.com>
2014-01-24 17:42:09 +00:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: make send's file extent item search more efficient Instead of looking for a file extent item, process it, release the path and do a btree search for the next file extent item, just process all file extent items in a leaf without intermediate btree searches. This way we save cpu and we're not blocking other tasks or affecting concurrency on the btree, because send's paths use the commit root and skip btree node/leaf locking. Signed-off-by: Filipe David Borba Manana <fdmanana@gmail.com> Signed-off-by: Josef Bacik <jbacik@fb.com> Signed-off-by: Chris Mason <clm@fb.com>
2014-01-24 17:42:09 +00:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: make send's file extent item search more efficient Instead of looking for a file extent item, process it, release the path and do a btree search for the next file extent item, just process all file extent items in a leaf without intermediate btree searches. This way we save cpu and we're not blocking other tasks or affecting concurrency on the btree, because send's paths use the commit root and skip btree node/leaf locking. Signed-off-by: Filipe David Borba Manana <fdmanana@gmail.com> Signed-off-by: Josef Bacik <jbacik@fb.com> Signed-off-by: Chris Mason <clm@fb.com>
2014-01-24 17:42:09 +00:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: make send's file extent item search more efficient Instead of looking for a file extent item, process it, release the path and do a btree search for the next file extent item, just process all file extent items in a leaf without intermediate btree searches. This way we save cpu and we're not blocking other tasks or affecting concurrency on the btree, because send's paths use the commit root and skip btree node/leaf locking. Signed-off-by: Filipe David Borba Manana <fdmanana@gmail.com> Signed-off-by: Josef Bacik <jbacik@fb.com> Signed-off-by: Chris Mason <clm@fb.com>
2014-01-24 17:42:09 +00:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: fix infinite path build loops in incremental send The send operation processes inodes by their ascending number, and assumes that any rename/move operation can be successfully performed (sent to the caller) once all previous inodes (those with a smaller inode number than the one we're currently processing) were processed. This is not true when an incremental send had to process an hierarchical change between 2 snapshots where the parent-children relationship between directory inodes was reversed - that is, parents became children and children became parents. This situation made the path building code go into an infinite loop, which kept allocating more and more memory that eventually lead to a krealloc warning being displayed in dmesg: WARNING: CPU: 1 PID: 5705 at mm/page_alloc.c:2477 __alloc_pages_nodemask+0x365/0xad0() Modules linked in: btrfs raid6_pq xor pci_stub vboxpci(O) vboxnetadp(O) vboxnetflt(O) vboxdrv(O) snd_hda_codec_hdmi snd_hda_codec_realtek joydev radeon snd_hda_intel snd_hda_codec snd_hwdep snd_seq_midi snd_pcm psmouse i915 snd_rawmidi serio_raw snd_seq_midi_event lpc_ich snd_seq snd_timer ttm snd_seq_device rfcomm drm_kms_helper parport_pc bnep bluetooth drm ppdev snd soundcore i2c_algo_bit snd_page_alloc binfmt_misc video lp parport r8169 mii hid_generic usbhid hid CPU: 1 PID: 5705 Comm: btrfs Tainted: G O 3.13.0-rc7-fdm-btrfs-next-18+ #3 Hardware name: To Be Filled By O.E.M. To Be Filled By O.E.M./Z77 Pro4, BIOS P1.50 09/04/2012 [ 5381.660441] 00000000000009ad ffff8806f6f2f4e8 ffffffff81777434 0000000000000007 [ 5381.660447] 0000000000000000 ffff8806f6f2f528 ffffffff8104a9ec ffff8807038f36f0 [ 5381.660452] 0000000000000000 0000000000000206 ffff8807038f2490 ffff8807038f36f0 [ 5381.660457] Call Trace: [ 5381.660464] [<ffffffff81777434>] dump_stack+0x4e/0x68 [ 5381.660471] [<ffffffff8104a9ec>] warn_slowpath_common+0x8c/0xc0 [ 5381.660476] [<ffffffff8104aa3a>] warn_slowpath_null+0x1a/0x20 [ 5381.660480] [<ffffffff81144995>] __alloc_pages_nodemask+0x365/0xad0 [ 5381.660487] [<ffffffff8108313f>] ? local_clock+0x4f/0x60 [ 5381.660491] [<ffffffff811430e8>] ? free_one_page+0x98/0x440 [ 5381.660495] [<ffffffff8108313f>] ? local_clock+0x4f/0x60 [ 5381.660502] [<ffffffff8113fae4>] ? __get_free_pages+0x14/0x50 [ 5381.660508] [<ffffffff81095fb8>] ? trace_hardirqs_off_caller+0x28/0xd0 [ 5381.660515] [<ffffffff81183caf>] alloc_pages_current+0x10f/0x1f0 [ 5381.660520] [<ffffffff8113fae4>] ? __get_free_pages+0x14/0x50 [ 5381.660524] [<ffffffff8113fae4>] __get_free_pages+0x14/0x50 [ 5381.660530] [<ffffffff8115dace>] kmalloc_order_trace+0x3e/0x100 [ 5381.660536] [<ffffffff81191ea0>] __kmalloc_track_caller+0x220/0x230 [ 5381.660560] [<ffffffffa0729fdb>] ? fs_path_ensure_buf.part.12+0x6b/0x200 [btrfs] [ 5381.660564] [<ffffffff8178085c>] ? retint_restore_args+0xe/0xe [ 5381.660569] [<ffffffff811580ef>] krealloc+0x6f/0xb0 [ 5381.660586] [<ffffffffa0729fdb>] fs_path_ensure_buf.part.12+0x6b/0x200 [btrfs] [ 5381.660601] [<ffffffffa072a208>] fs_path_prepare_for_add+0x98/0xb0 [btrfs] [ 5381.660615] [<ffffffffa072a2bc>] fs_path_add_path+0x2c/0x60 [btrfs] [ 5381.660628] [<ffffffffa072c55c>] get_cur_path+0x7c/0x1c0 [btrfs] Even without this loop, the incremental send couldn't succeed, because it would attempt to send a rename/move operation for the lower inode before the highest inode number was renamed/move. This issue is easy to trigger with the following steps: $ mkfs.btrfs -f /dev/sdb3 $ mount /dev/sdb3 /mnt/btrfs $ mkdir -p /mnt/btrfs/a/b/c/d $ mkdir /mnt/btrfs/a/b/c2 $ btrfs subvol snapshot -r /mnt/btrfs /mnt/btrfs/snap1 $ mv /mnt/btrfs/a/b/c/d /mnt/btrfs/a/b/c2/d2 $ mv /mnt/btrfs/a/b/c /mnt/btrfs/a/b/c2/d2/cc $ btrfs subvol snapshot -r /mnt/btrfs /mnt/btrfs/snap2 $ btrfs send -p /mnt/btrfs/snap1 /mnt/btrfs/snap2 > /tmp/incremental.send The structure of the filesystem when the first snapshot is taken is: . (ino 256) |-- a (ino 257) |-- b (ino 258) |-- c (ino 259) | |-- d (ino 260) | |-- c2 (ino 261) And its structure when the second snapshot is taken is: . (ino 256) |-- a (ino 257) |-- b (ino 258) |-- c2 (ino 261) |-- d2 (ino 260) |-- cc (ino 259) Before the move/rename operation is performed for the inode 259, the move/rename for inode 260 must be performed, since 259 is now a child of 260. A test case for xfstests, with a more complex scenario, will follow soon. Signed-off-by: Filipe David Borba Manana <fdmanana@gmail.com> Signed-off-by: Josef Bacik <jbacik@fb.com> Signed-off-by: Chris Mason <clm@fb.com>
2014-01-22 10:00:53 +00:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: extended inode refs support for send mechanism This adds support for the new extended inode refs to btrfs send. Signed-off-by: Jan Schmidt <list.btrfs@jan-o-sch.net>
2012-10-15 08:30:45 +00:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: fix infinite path build loops in incremental send The send operation processes inodes by their ascending number, and assumes that any rename/move operation can be successfully performed (sent to the caller) once all previous inodes (those with a smaller inode number than the one we're currently processing) were processed. This is not true when an incremental send had to process an hierarchical change between 2 snapshots where the parent-children relationship between directory inodes was reversed - that is, parents became children and children became parents. This situation made the path building code go into an infinite loop, which kept allocating more and more memory that eventually lead to a krealloc warning being displayed in dmesg: WARNING: CPU: 1 PID: 5705 at mm/page_alloc.c:2477 __alloc_pages_nodemask+0x365/0xad0() Modules linked in: btrfs raid6_pq xor pci_stub vboxpci(O) vboxnetadp(O) vboxnetflt(O) vboxdrv(O) snd_hda_codec_hdmi snd_hda_codec_realtek joydev radeon snd_hda_intel snd_hda_codec snd_hwdep snd_seq_midi snd_pcm psmouse i915 snd_rawmidi serio_raw snd_seq_midi_event lpc_ich snd_seq snd_timer ttm snd_seq_device rfcomm drm_kms_helper parport_pc bnep bluetooth drm ppdev snd soundcore i2c_algo_bit snd_page_alloc binfmt_misc video lp parport r8169 mii hid_generic usbhid hid CPU: 1 PID: 5705 Comm: btrfs Tainted: G O 3.13.0-rc7-fdm-btrfs-next-18+ #3 Hardware name: To Be Filled By O.E.M. To Be Filled By O.E.M./Z77 Pro4, BIOS P1.50 09/04/2012 [ 5381.660441] 00000000000009ad ffff8806f6f2f4e8 ffffffff81777434 0000000000000007 [ 5381.660447] 0000000000000000 ffff8806f6f2f528 ffffffff8104a9ec ffff8807038f36f0 [ 5381.660452] 0000000000000000 0000000000000206 ffff8807038f2490 ffff8807038f36f0 [ 5381.660457] Call Trace: [ 5381.660464] [<ffffffff81777434>] dump_stack+0x4e/0x68 [ 5381.660471] [<ffffffff8104a9ec>] warn_slowpath_common+0x8c/0xc0 [ 5381.660476] [<ffffffff8104aa3a>] warn_slowpath_null+0x1a/0x20 [ 5381.660480] [<ffffffff81144995>] __alloc_pages_nodemask+0x365/0xad0 [ 5381.660487] [<ffffffff8108313f>] ? local_clock+0x4f/0x60 [ 5381.660491] [<ffffffff811430e8>] ? free_one_page+0x98/0x440 [ 5381.660495] [<ffffffff8108313f>] ? local_clock+0x4f/0x60 [ 5381.660502] [<ffffffff8113fae4>] ? __get_free_pages+0x14/0x50 [ 5381.660508] [<ffffffff81095fb8>] ? trace_hardirqs_off_caller+0x28/0xd0 [ 5381.660515] [<ffffffff81183caf>] alloc_pages_current+0x10f/0x1f0 [ 5381.660520] [<ffffffff8113fae4>] ? __get_free_pages+0x14/0x50 [ 5381.660524] [<ffffffff8113fae4>] __get_free_pages+0x14/0x50 [ 5381.660530] [<ffffffff8115dace>] kmalloc_order_trace+0x3e/0x100 [ 5381.660536] [<ffffffff81191ea0>] __kmalloc_track_caller+0x220/0x230 [ 5381.660560] [<ffffffffa0729fdb>] ? fs_path_ensure_buf.part.12+0x6b/0x200 [btrfs] [ 5381.660564] [<ffffffff8178085c>] ? retint_restore_args+0xe/0xe [ 5381.660569] [<ffffffff811580ef>] krealloc+0x6f/0xb0 [ 5381.660586] [<ffffffffa0729fdb>] fs_path_ensure_buf.part.12+0x6b/0x200 [btrfs] [ 5381.660601] [<ffffffffa072a208>] fs_path_prepare_for_add+0x98/0xb0 [btrfs] [ 5381.660615] [<ffffffffa072a2bc>] fs_path_add_path+0x2c/0x60 [btrfs] [ 5381.660628] [<ffffffffa072c55c>] get_cur_path+0x7c/0x1c0 [btrfs] Even without this loop, the incremental send couldn't succeed, because it would attempt to send a rename/move operation for the lower inode before the highest inode number was renamed/move. This issue is easy to trigger with the following steps: $ mkfs.btrfs -f /dev/sdb3 $ mount /dev/sdb3 /mnt/btrfs $ mkdir -p /mnt/btrfs/a/b/c/d $ mkdir /mnt/btrfs/a/b/c2 $ btrfs subvol snapshot -r /mnt/btrfs /mnt/btrfs/snap1 $ mv /mnt/btrfs/a/b/c/d /mnt/btrfs/a/b/c2/d2 $ mv /mnt/btrfs/a/b/c /mnt/btrfs/a/b/c2/d2/cc $ btrfs subvol snapshot -r /mnt/btrfs /mnt/btrfs/snap2 $ btrfs send -p /mnt/btrfs/snap1 /mnt/btrfs/snap2 > /tmp/incremental.send The structure of the filesystem when the first snapshot is taken is: . (ino 256) |-- a (ino 257) |-- b (ino 258) |-- c (ino 259) | |-- d (ino 260) | |-- c2 (ino 261) And its structure when the second snapshot is taken is: . (ino 256) |-- a (ino 257) |-- b (ino 258) |-- c2 (ino 261) |-- d2 (ino 260) |-- cc (ino 259) Before the move/rename operation is performed for the inode 259, the move/rename for inode 260 must be performed, since 259 is now a child of 260. A test case for xfstests, with a more complex scenario, will follow soon. Signed-off-by: Filipe David Borba Manana <fdmanana@gmail.com> Signed-off-by: Josef Bacik <jbacik@fb.com> Signed-off-by: Chris Mason <clm@fb.com>
2014-01-22 10:00:53 +00:00
Btrfs: update send_progress at correct places Updating send_progress in process_recorded_refs was not correct. It got updated too early in the cur_inode_new_gen case. Reported-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com> Reported-by: Arne Jansen <sensille@gmx.net> Signed-off-by: Alexander Block <ablock84@googlemail.com>
2012-07-28 16:09:35 +02:00
Btrfs: fix infinite path build loops in incremental send The send operation processes inodes by their ascending number, and assumes that any rename/move operation can be successfully performed (sent to the caller) once all previous inodes (those with a smaller inode number than the one we're currently processing) were processed. This is not true when an incremental send had to process an hierarchical change between 2 snapshots where the parent-children relationship between directory inodes was reversed - that is, parents became children and children became parents. This situation made the path building code go into an infinite loop, which kept allocating more and more memory that eventually lead to a krealloc warning being displayed in dmesg: WARNING: CPU: 1 PID: 5705 at mm/page_alloc.c:2477 __alloc_pages_nodemask+0x365/0xad0() Modules linked in: btrfs raid6_pq xor pci_stub vboxpci(O) vboxnetadp(O) vboxnetflt(O) vboxdrv(O) snd_hda_codec_hdmi snd_hda_codec_realtek joydev radeon snd_hda_intel snd_hda_codec snd_hwdep snd_seq_midi snd_pcm psmouse i915 snd_rawmidi serio_raw snd_seq_midi_event lpc_ich snd_seq snd_timer ttm snd_seq_device rfcomm drm_kms_helper parport_pc bnep bluetooth drm ppdev snd soundcore i2c_algo_bit snd_page_alloc binfmt_misc video lp parport r8169 mii hid_generic usbhid hid CPU: 1 PID: 5705 Comm: btrfs Tainted: G O 3.13.0-rc7-fdm-btrfs-next-18+ #3 Hardware name: To Be Filled By O.E.M. To Be Filled By O.E.M./Z77 Pro4, BIOS P1.50 09/04/2012 [ 5381.660441] 00000000000009ad ffff8806f6f2f4e8 ffffffff81777434 0000000000000007 [ 5381.660447] 0000000000000000 ffff8806f6f2f528 ffffffff8104a9ec ffff8807038f36f0 [ 5381.660452] 0000000000000000 0000000000000206 ffff8807038f2490 ffff8807038f36f0 [ 5381.660457] Call Trace: [ 5381.660464] [<ffffffff81777434>] dump_stack+0x4e/0x68 [ 5381.660471] [<ffffffff8104a9ec>] warn_slowpath_common+0x8c/0xc0 [ 5381.660476] [<ffffffff8104aa3a>] warn_slowpath_null+0x1a/0x20 [ 5381.660480] [<ffffffff81144995>] __alloc_pages_nodemask+0x365/0xad0 [ 5381.660487] [<ffffffff8108313f>] ? local_clock+0x4f/0x60 [ 5381.660491] [<ffffffff811430e8>] ? free_one_page+0x98/0x440 [ 5381.660495] [<ffffffff8108313f>] ? local_clock+0x4f/0x60 [ 5381.660502] [<ffffffff8113fae4>] ? __get_free_pages+0x14/0x50 [ 5381.660508] [<ffffffff81095fb8>] ? trace_hardirqs_off_caller+0x28/0xd0 [ 5381.660515] [<ffffffff81183caf>] alloc_pages_current+0x10f/0x1f0 [ 5381.660520] [<ffffffff8113fae4>] ? __get_free_pages+0x14/0x50 [ 5381.660524] [<ffffffff8113fae4>] __get_free_pages+0x14/0x50 [ 5381.660530] [<ffffffff8115dace>] kmalloc_order_trace+0x3e/0x100 [ 5381.660536] [<ffffffff81191ea0>] __kmalloc_track_caller+0x220/0x230 [ 5381.660560] [<ffffffffa0729fdb>] ? fs_path_ensure_buf.part.12+0x6b/0x200 [btrfs] [ 5381.660564] [<ffffffff8178085c>] ? retint_restore_args+0xe/0xe [ 5381.660569] [<ffffffff811580ef>] krealloc+0x6f/0xb0 [ 5381.660586] [<ffffffffa0729fdb>] fs_path_ensure_buf.part.12+0x6b/0x200 [btrfs] [ 5381.660601] [<ffffffffa072a208>] fs_path_prepare_for_add+0x98/0xb0 [btrfs] [ 5381.660615] [<ffffffffa072a2bc>] fs_path_add_path+0x2c/0x60 [btrfs] [ 5381.660628] [<ffffffffa072c55c>] get_cur_path+0x7c/0x1c0 [btrfs] Even without this loop, the incremental send couldn't succeed, because it would attempt to send a rename/move operation for the lower inode before the highest inode number was renamed/move. This issue is easy to trigger with the following steps: $ mkfs.btrfs -f /dev/sdb3 $ mount /dev/sdb3 /mnt/btrfs $ mkdir -p /mnt/btrfs/a/b/c/d $ mkdir /mnt/btrfs/a/b/c2 $ btrfs subvol snapshot -r /mnt/btrfs /mnt/btrfs/snap1 $ mv /mnt/btrfs/a/b/c/d /mnt/btrfs/a/b/c2/d2 $ mv /mnt/btrfs/a/b/c /mnt/btrfs/a/b/c2/d2/cc $ btrfs subvol snapshot -r /mnt/btrfs /mnt/btrfs/snap2 $ btrfs send -p /mnt/btrfs/snap1 /mnt/btrfs/snap2 > /tmp/incremental.send The structure of the filesystem when the first snapshot is taken is: . (ino 256) |-- a (ino 257) |-- b (ino 258) |-- c (ino 259) | |-- d (ino 260) | |-- c2 (ino 261) And its structure when the second snapshot is taken is: . (ino 256) |-- a (ino 257) |-- b (ino 258) |-- c2 (ino 261) |-- d2 (ino 260) |-- cc (ino 259) Before the move/rename operation is performed for the inode 259, the move/rename for inode 260 must be performed, since 259 is now a child of 260. A test case for xfstests, with a more complex scenario, will follow soon. Signed-off-by: Filipe David Borba Manana <fdmanana@gmail.com> Signed-off-by: Josef Bacik <jbacik@fb.com> Signed-off-by: Chris Mason <clm@fb.com>
2014-01-22 10:00:53 +00:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: fix infinite path build loops in incremental send The send operation processes inodes by their ascending number, and assumes that any rename/move operation can be successfully performed (sent to the caller) once all previous inodes (those with a smaller inode number than the one we're currently processing) were processed. This is not true when an incremental send had to process an hierarchical change between 2 snapshots where the parent-children relationship between directory inodes was reversed - that is, parents became children and children became parents. This situation made the path building code go into an infinite loop, which kept allocating more and more memory that eventually lead to a krealloc warning being displayed in dmesg: WARNING: CPU: 1 PID: 5705 at mm/page_alloc.c:2477 __alloc_pages_nodemask+0x365/0xad0() Modules linked in: btrfs raid6_pq xor pci_stub vboxpci(O) vboxnetadp(O) vboxnetflt(O) vboxdrv(O) snd_hda_codec_hdmi snd_hda_codec_realtek joydev radeon snd_hda_intel snd_hda_codec snd_hwdep snd_seq_midi snd_pcm psmouse i915 snd_rawmidi serio_raw snd_seq_midi_event lpc_ich snd_seq snd_timer ttm snd_seq_device rfcomm drm_kms_helper parport_pc bnep bluetooth drm ppdev snd soundcore i2c_algo_bit snd_page_alloc binfmt_misc video lp parport r8169 mii hid_generic usbhid hid CPU: 1 PID: 5705 Comm: btrfs Tainted: G O 3.13.0-rc7-fdm-btrfs-next-18+ #3 Hardware name: To Be Filled By O.E.M. To Be Filled By O.E.M./Z77 Pro4, BIOS P1.50 09/04/2012 [ 5381.660441] 00000000000009ad ffff8806f6f2f4e8 ffffffff81777434 0000000000000007 [ 5381.660447] 0000000000000000 ffff8806f6f2f528 ffffffff8104a9ec ffff8807038f36f0 [ 5381.660452] 0000000000000000 0000000000000206 ffff8807038f2490 ffff8807038f36f0 [ 5381.660457] Call Trace: [ 5381.660464] [<ffffffff81777434>] dump_stack+0x4e/0x68 [ 5381.660471] [<ffffffff8104a9ec>] warn_slowpath_common+0x8c/0xc0 [ 5381.660476] [<ffffffff8104aa3a>] warn_slowpath_null+0x1a/0x20 [ 5381.660480] [<ffffffff81144995>] __alloc_pages_nodemask+0x365/0xad0 [ 5381.660487] [<ffffffff8108313f>] ? local_clock+0x4f/0x60 [ 5381.660491] [<ffffffff811430e8>] ? free_one_page+0x98/0x440 [ 5381.660495] [<ffffffff8108313f>] ? local_clock+0x4f/0x60 [ 5381.660502] [<ffffffff8113fae4>] ? __get_free_pages+0x14/0x50 [ 5381.660508] [<ffffffff81095fb8>] ? trace_hardirqs_off_caller+0x28/0xd0 [ 5381.660515] [<ffffffff81183caf>] alloc_pages_current+0x10f/0x1f0 [ 5381.660520] [<ffffffff8113fae4>] ? __get_free_pages+0x14/0x50 [ 5381.660524] [<ffffffff8113fae4>] __get_free_pages+0x14/0x50 [ 5381.660530] [<ffffffff8115dace>] kmalloc_order_trace+0x3e/0x100 [ 5381.660536] [<ffffffff81191ea0>] __kmalloc_track_caller+0x220/0x230 [ 5381.660560] [<ffffffffa0729fdb>] ? fs_path_ensure_buf.part.12+0x6b/0x200 [btrfs] [ 5381.660564] [<ffffffff8178085c>] ? retint_restore_args+0xe/0xe [ 5381.660569] [<ffffffff811580ef>] krealloc+0x6f/0xb0 [ 5381.660586] [<ffffffffa0729fdb>] fs_path_ensure_buf.part.12+0x6b/0x200 [btrfs] [ 5381.660601] [<ffffffffa072a208>] fs_path_prepare_for_add+0x98/0xb0 [btrfs] [ 5381.660615] [<ffffffffa072a2bc>] fs_path_add_path+0x2c/0x60 [btrfs] [ 5381.660628] [<ffffffffa072c55c>] get_cur_path+0x7c/0x1c0 [btrfs] Even without this loop, the incremental send couldn't succeed, because it would attempt to send a rename/move operation for the lower inode before the highest inode number was renamed/move. This issue is easy to trigger with the following steps: $ mkfs.btrfs -f /dev/sdb3 $ mount /dev/sdb3 /mnt/btrfs $ mkdir -p /mnt/btrfs/a/b/c/d $ mkdir /mnt/btrfs/a/b/c2 $ btrfs subvol snapshot -r /mnt/btrfs /mnt/btrfs/snap1 $ mv /mnt/btrfs/a/b/c/d /mnt/btrfs/a/b/c2/d2 $ mv /mnt/btrfs/a/b/c /mnt/btrfs/a/b/c2/d2/cc $ btrfs subvol snapshot -r /mnt/btrfs /mnt/btrfs/snap2 $ btrfs send -p /mnt/btrfs/snap1 /mnt/btrfs/snap2 > /tmp/incremental.send The structure of the filesystem when the first snapshot is taken is: . (ino 256) |-- a (ino 257) |-- b (ino 258) |-- c (ino 259) | |-- d (ino 260) | |-- c2 (ino 261) And its structure when the second snapshot is taken is: . (ino 256) |-- a (ino 257) |-- b (ino 258) |-- c2 (ino 261) |-- d2 (ino 260) |-- cc (ino 259) Before the move/rename operation is performed for the inode 259, the move/rename for inode 260 must be performed, since 259 is now a child of 260. A test case for xfstests, with a more complex scenario, will follow soon. Signed-off-by: Filipe David Borba Manana <fdmanana@gmail.com> Signed-off-by: Josef Bacik <jbacik@fb.com> Signed-off-by: Chris Mason <clm@fb.com>
2014-01-22 10:00:53 +00:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: fix infinite path build loops in incremental send The send operation processes inodes by their ascending number, and assumes that any rename/move operation can be successfully performed (sent to the caller) once all previous inodes (those with a smaller inode number than the one we're currently processing) were processed. This is not true when an incremental send had to process an hierarchical change between 2 snapshots where the parent-children relationship between directory inodes was reversed - that is, parents became children and children became parents. This situation made the path building code go into an infinite loop, which kept allocating more and more memory that eventually lead to a krealloc warning being displayed in dmesg: WARNING: CPU: 1 PID: 5705 at mm/page_alloc.c:2477 __alloc_pages_nodemask+0x365/0xad0() Modules linked in: btrfs raid6_pq xor pci_stub vboxpci(O) vboxnetadp(O) vboxnetflt(O) vboxdrv(O) snd_hda_codec_hdmi snd_hda_codec_realtek joydev radeon snd_hda_intel snd_hda_codec snd_hwdep snd_seq_midi snd_pcm psmouse i915 snd_rawmidi serio_raw snd_seq_midi_event lpc_ich snd_seq snd_timer ttm snd_seq_device rfcomm drm_kms_helper parport_pc bnep bluetooth drm ppdev snd soundcore i2c_algo_bit snd_page_alloc binfmt_misc video lp parport r8169 mii hid_generic usbhid hid CPU: 1 PID: 5705 Comm: btrfs Tainted: G O 3.13.0-rc7-fdm-btrfs-next-18+ #3 Hardware name: To Be Filled By O.E.M. To Be Filled By O.E.M./Z77 Pro4, BIOS P1.50 09/04/2012 [ 5381.660441] 00000000000009ad ffff8806f6f2f4e8 ffffffff81777434 0000000000000007 [ 5381.660447] 0000000000000000 ffff8806f6f2f528 ffffffff8104a9ec ffff8807038f36f0 [ 5381.660452] 0000000000000000 0000000000000206 ffff8807038f2490 ffff8807038f36f0 [ 5381.660457] Call Trace: [ 5381.660464] [<ffffffff81777434>] dump_stack+0x4e/0x68 [ 5381.660471] [<ffffffff8104a9ec>] warn_slowpath_common+0x8c/0xc0 [ 5381.660476] [<ffffffff8104aa3a>] warn_slowpath_null+0x1a/0x20 [ 5381.660480] [<ffffffff81144995>] __alloc_pages_nodemask+0x365/0xad0 [ 5381.660487] [<ffffffff8108313f>] ? local_clock+0x4f/0x60 [ 5381.660491] [<ffffffff811430e8>] ? free_one_page+0x98/0x440 [ 5381.660495] [<ffffffff8108313f>] ? local_clock+0x4f/0x60 [ 5381.660502] [<ffffffff8113fae4>] ? __get_free_pages+0x14/0x50 [ 5381.660508] [<ffffffff81095fb8>] ? trace_hardirqs_off_caller+0x28/0xd0 [ 5381.660515] [<ffffffff81183caf>] alloc_pages_current+0x10f/0x1f0 [ 5381.660520] [<ffffffff8113fae4>] ? __get_free_pages+0x14/0x50 [ 5381.660524] [<ffffffff8113fae4>] __get_free_pages+0x14/0x50 [ 5381.660530] [<ffffffff8115dace>] kmalloc_order_trace+0x3e/0x100 [ 5381.660536] [<ffffffff81191ea0>] __kmalloc_track_caller+0x220/0x230 [ 5381.660560] [<ffffffffa0729fdb>] ? fs_path_ensure_buf.part.12+0x6b/0x200 [btrfs] [ 5381.660564] [<ffffffff8178085c>] ? retint_restore_args+0xe/0xe [ 5381.660569] [<ffffffff811580ef>] krealloc+0x6f/0xb0 [ 5381.660586] [<ffffffffa0729fdb>] fs_path_ensure_buf.part.12+0x6b/0x200 [btrfs] [ 5381.660601] [<ffffffffa072a208>] fs_path_prepare_for_add+0x98/0xb0 [btrfs] [ 5381.660615] [<ffffffffa072a2bc>] fs_path_add_path+0x2c/0x60 [btrfs] [ 5381.660628] [<ffffffffa072c55c>] get_cur_path+0x7c/0x1c0 [btrfs] Even without this loop, the incremental send couldn't succeed, because it would attempt to send a rename/move operation for the lower inode before the highest inode number was renamed/move. This issue is easy to trigger with the following steps: $ mkfs.btrfs -f /dev/sdb3 $ mount /dev/sdb3 /mnt/btrfs $ mkdir -p /mnt/btrfs/a/b/c/d $ mkdir /mnt/btrfs/a/b/c2 $ btrfs subvol snapshot -r /mnt/btrfs /mnt/btrfs/snap1 $ mv /mnt/btrfs/a/b/c/d /mnt/btrfs/a/b/c2/d2 $ mv /mnt/btrfs/a/b/c /mnt/btrfs/a/b/c2/d2/cc $ btrfs subvol snapshot -r /mnt/btrfs /mnt/btrfs/snap2 $ btrfs send -p /mnt/btrfs/snap1 /mnt/btrfs/snap2 > /tmp/incremental.send The structure of the filesystem when the first snapshot is taken is: . (ino 256) |-- a (ino 257) |-- b (ino 258) |-- c (ino 259) | |-- d (ino 260) | |-- c2 (ino 261) And its structure when the second snapshot is taken is: . (ino 256) |-- a (ino 257) |-- b (ino 258) |-- c2 (ino 261) |-- d2 (ino 260) |-- cc (ino 259) Before the move/rename operation is performed for the inode 259, the move/rename for inode 260 must be performed, since 259 is now a child of 260. A test case for xfstests, with a more complex scenario, will follow soon. Signed-off-by: Filipe David Borba Manana <fdmanana@gmail.com> Signed-off-by: Josef Bacik <jbacik@fb.com> Signed-off-by: Chris Mason <clm@fb.com>
2014-01-22 10:00:53 +00:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: fix infinite path build loops in incremental send The send operation processes inodes by their ascending number, and assumes that any rename/move operation can be successfully performed (sent to the caller) once all previous inodes (those with a smaller inode number than the one we're currently processing) were processed. This is not true when an incremental send had to process an hierarchical change between 2 snapshots where the parent-children relationship between directory inodes was reversed - that is, parents became children and children became parents. This situation made the path building code go into an infinite loop, which kept allocating more and more memory that eventually lead to a krealloc warning being displayed in dmesg: WARNING: CPU: 1 PID: 5705 at mm/page_alloc.c:2477 __alloc_pages_nodemask+0x365/0xad0() Modules linked in: btrfs raid6_pq xor pci_stub vboxpci(O) vboxnetadp(O) vboxnetflt(O) vboxdrv(O) snd_hda_codec_hdmi snd_hda_codec_realtek joydev radeon snd_hda_intel snd_hda_codec snd_hwdep snd_seq_midi snd_pcm psmouse i915 snd_rawmidi serio_raw snd_seq_midi_event lpc_ich snd_seq snd_timer ttm snd_seq_device rfcomm drm_kms_helper parport_pc bnep bluetooth drm ppdev snd soundcore i2c_algo_bit snd_page_alloc binfmt_misc video lp parport r8169 mii hid_generic usbhid hid CPU: 1 PID: 5705 Comm: btrfs Tainted: G O 3.13.0-rc7-fdm-btrfs-next-18+ #3 Hardware name: To Be Filled By O.E.M. To Be Filled By O.E.M./Z77 Pro4, BIOS P1.50 09/04/2012 [ 5381.660441] 00000000000009ad ffff8806f6f2f4e8 ffffffff81777434 0000000000000007 [ 5381.660447] 0000000000000000 ffff8806f6f2f528 ffffffff8104a9ec ffff8807038f36f0 [ 5381.660452] 0000000000000000 0000000000000206 ffff8807038f2490 ffff8807038f36f0 [ 5381.660457] Call Trace: [ 5381.660464] [<ffffffff81777434>] dump_stack+0x4e/0x68 [ 5381.660471] [<ffffffff8104a9ec>] warn_slowpath_common+0x8c/0xc0 [ 5381.660476] [<ffffffff8104aa3a>] warn_slowpath_null+0x1a/0x20 [ 5381.660480] [<ffffffff81144995>] __alloc_pages_nodemask+0x365/0xad0 [ 5381.660487] [<ffffffff8108313f>] ? local_clock+0x4f/0x60 [ 5381.660491] [<ffffffff811430e8>] ? free_one_page+0x98/0x440 [ 5381.660495] [<ffffffff8108313f>] ? local_clock+0x4f/0x60 [ 5381.660502] [<ffffffff8113fae4>] ? __get_free_pages+0x14/0x50 [ 5381.660508] [<ffffffff81095fb8>] ? trace_hardirqs_off_caller+0x28/0xd0 [ 5381.660515] [<ffffffff81183caf>] alloc_pages_current+0x10f/0x1f0 [ 5381.660520] [<ffffffff8113fae4>] ? __get_free_pages+0x14/0x50 [ 5381.660524] [<ffffffff8113fae4>] __get_free_pages+0x14/0x50 [ 5381.660530] [<ffffffff8115dace>] kmalloc_order_trace+0x3e/0x100 [ 5381.660536] [<ffffffff81191ea0>] __kmalloc_track_caller+0x220/0x230 [ 5381.660560] [<ffffffffa0729fdb>] ? fs_path_ensure_buf.part.12+0x6b/0x200 [btrfs] [ 5381.660564] [<ffffffff8178085c>] ? retint_restore_args+0xe/0xe [ 5381.660569] [<ffffffff811580ef>] krealloc+0x6f/0xb0 [ 5381.660586] [<ffffffffa0729fdb>] fs_path_ensure_buf.part.12+0x6b/0x200 [btrfs] [ 5381.660601] [<ffffffffa072a208>] fs_path_prepare_for_add+0x98/0xb0 [btrfs] [ 5381.660615] [<ffffffffa072a2bc>] fs_path_add_path+0x2c/0x60 [btrfs] [ 5381.660628] [<ffffffffa072c55c>] get_cur_path+0x7c/0x1c0 [btrfs] Even without this loop, the incremental send couldn't succeed, because it would attempt to send a rename/move operation for the lower inode before the highest inode number was renamed/move. This issue is easy to trigger with the following steps: $ mkfs.btrfs -f /dev/sdb3 $ mount /dev/sdb3 /mnt/btrfs $ mkdir -p /mnt/btrfs/a/b/c/d $ mkdir /mnt/btrfs/a/b/c2 $ btrfs subvol snapshot -r /mnt/btrfs /mnt/btrfs/snap1 $ mv /mnt/btrfs/a/b/c/d /mnt/btrfs/a/b/c2/d2 $ mv /mnt/btrfs/a/b/c /mnt/btrfs/a/b/c2/d2/cc $ btrfs subvol snapshot -r /mnt/btrfs /mnt/btrfs/snap2 $ btrfs send -p /mnt/btrfs/snap1 /mnt/btrfs/snap2 > /tmp/incremental.send The structure of the filesystem when the first snapshot is taken is: . (ino 256) |-- a (ino 257) |-- b (ino 258) |-- c (ino 259) | |-- d (ino 260) | |-- c2 (ino 261) And its structure when the second snapshot is taken is: . (ino 256) |-- a (ino 257) |-- b (ino 258) |-- c2 (ino 261) |-- d2 (ino 260) |-- cc (ino 259) Before the move/rename operation is performed for the inode 259, the move/rename for inode 260 must be performed, since 259 is now a child of 260. A test case for xfstests, with a more complex scenario, will follow soon. Signed-off-by: Filipe David Borba Manana <fdmanana@gmail.com> Signed-off-by: Josef Bacik <jbacik@fb.com> Signed-off-by: Chris Mason <clm@fb.com>
2014-01-22 10:00:53 +00:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: add rdev to get_inode_info in send/receive We need rdev in the next commit. Signed-off-by: Alexander Block <ablock84@googlemail.com>
2012-07-26 23:39:10 +02:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: Send: preserve ownership (uid and gid) also for symlinks. This patch also requires a change in the user-space part of "receive". We need to use "lchown" instead of "chown". We will do this in the following patch. Signed-off-by: Alex Lyakas <alex.btrfs@zadarastorage.com> if (S_ISREG(sctx->cur_inode_mode)) {
2012-10-17 13:52:47 +00:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: Send: preserve ownership (uid and gid) also for symlinks. This patch also requires a change in the user-space part of "receive". We need to use "lchown" instead of "chown". We will do this in the following patch. Signed-off-by: Alex Lyakas <alex.btrfs@zadarastorage.com> if (S_ISREG(sctx->cur_inode_mode)) {
2012-10-17 13:52:47 +00:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: Send: preserve ownership (uid and gid) also for symlinks. This patch also requires a change in the user-space part of "receive". We need to use "lchown" instead of "chown". We will do this in the following patch. Signed-off-by: Alex Lyakas <alex.btrfs@zadarastorage.com> if (S_ISREG(sctx->cur_inode_mode)) {
2012-10-17 13:52:47 +00:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: incompatible format change to remove hole extents Btrfs has always had these filler extent data items for holes in inodes. This has made somethings very easy, like logging hole punches and sending hole punches. However for large holey files these extent data items are pure overhead. So add an incompatible feature to no longer add hole extents to reduce the amount of metadata used by these sort of files. This has a few changes for logging and send obviously since they will need to detect holes and log/send the holes if there are any. I've tested this thoroughly with xfstests and it doesn't cause any issues with and without the incompat format set. Thanks, Signed-off-by: Josef Bacik <jbacik@fusionio.com> Signed-off-by: Chris Mason <clm@fb.com>
2013-10-22 12:18:51 -04:00
Btrfs: send, fix data corruption due to incorrect hole detection During an incremental send, when we finish processing an inode (corresponding to a regular file) we would assume the gap between the end of the last processed file extent and the file's size corresponded to a file hole, and therefore incorrectly send a bunch of zero bytes to overwrite that region in the file. This affects only kernel 3.14. Reproducer: mkfs.btrfs -f /dev/sdc mount /dev/sdc /mnt xfs_io -f -c "falloc -k 0 268435456" /mnt/foo btrfs subvolume snapshot -r /mnt /mnt/mysnap0 xfs_io -c "pwrite -S 0x01 -b 9216 16190218 9216" /mnt/foo xfs_io -c "pwrite -S 0x02 -b 1121 198720104 1121" /mnt/foo xfs_io -c "pwrite -S 0x05 -b 9216 107887439 9216" /mnt/foo xfs_io -c "pwrite -S 0x06 -b 9216 225520207 9216" /mnt/foo xfs_io -c "pwrite -S 0x07 -b 67584 102138300 67584" /mnt/foo xfs_io -c "pwrite -S 0x08 -b 7000 94897484 7000" /mnt/foo xfs_io -c "pwrite -S 0x09 -b 113664 245083212 113664" /mnt/foo xfs_io -c "pwrite -S 0x10 -b 123 17937788 123" /mnt/foo xfs_io -c "pwrite -S 0x11 -b 39936 229573311 39936" /mnt/foo xfs_io -c "pwrite -S 0x12 -b 67584 174792222 67584" /mnt/foo xfs_io -c "pwrite -S 0x13 -b 9216 249253213 9216" /mnt/foo xfs_io -c "pwrite -S 0x16 -b 67584 150046083 67584" /mnt/foo xfs_io -c "pwrite -S 0x17 -b 39936 118246040 39936" /mnt/foo xfs_io -c "pwrite -S 0x18 -b 67584 215965442 67584" /mnt/foo xfs_io -c "pwrite -S 0x19 -b 33792 97096725 33792" /mnt/foo xfs_io -c "pwrite -S 0x20 -b 125952 166300596 125952" /mnt/foo xfs_io -c "pwrite -S 0x21 -b 123 1078957 123" /mnt/foo xfs_io -c "pwrite -S 0x25 -b 9216 212044492 9216" /mnt/foo xfs_io -c "pwrite -S 0x26 -b 7000 265037146 7000" /mnt/foo xfs_io -c "pwrite -S 0x27 -b 42757 215922685 42757" /mnt/foo xfs_io -c "pwrite -S 0x28 -b 7000 69865411 7000" /mnt/foo xfs_io -c "pwrite -S 0x29 -b 67584 67948958 67584" /mnt/foo xfs_io -c "pwrite -S 0x30 -b 39936 266967019 39936" /mnt/foo xfs_io -c "pwrite -S 0x31 -b 1121 19582453 1121" /mnt/foo xfs_io -c "pwrite -S 0x32 -b 17408 257710255 17408" /mnt/foo xfs_io -c "pwrite -S 0x33 -b 39936 3895518 39936" /mnt/foo xfs_io -c "pwrite -S 0x34 -b 125952 12045847 125952" /mnt/foo xfs_io -c "pwrite -S 0x35 -b 17408 19156379 17408" /mnt/foo xfs_io -c "pwrite -S 0x36 -b 39936 50160066 39936" /mnt/foo xfs_io -c "pwrite -S 0x37 -b 113664 9549793 113664" /mnt/foo xfs_io -c "pwrite -S 0x38 -b 105472 94391506 105472" /mnt/foo xfs_io -c "pwrite -S 0x39 -b 23552 143632863 23552" /mnt/foo xfs_io -c "pwrite -S 0x40 -b 39936 241283845 39936" /mnt/foo xfs_io -c "pwrite -S 0x41 -b 113664 199937606 113664" /mnt/foo xfs_io -c "pwrite -S 0x42 -b 67584 67380093 67584" /mnt/foo xfs_io -c "pwrite -S 0x43 -b 67584 26793129 67584" /mnt/foo xfs_io -c "pwrite -S 0x44 -b 39936 14421913 39936" /mnt/foo xfs_io -c "pwrite -S 0x45 -b 123 253097405 123" /mnt/foo xfs_io -c "pwrite -S 0x46 -b 1121 128233424 1121" /mnt/foo xfs_io -c "pwrite -S 0x47 -b 105472 91577959 105472" /mnt/foo xfs_io -c "pwrite -S 0x48 -b 1121 7245381 1121" /mnt/foo xfs_io -c "pwrite -S 0x49 -b 113664 182414694 113664" /mnt/foo xfs_io -c "pwrite -S 0x50 -b 9216 32750608 9216" /mnt/foo xfs_io -c "pwrite -S 0x51 -b 67584 266546049 67584" /mnt/foo xfs_io -c "pwrite -S 0x52 -b 67584 87969398 67584" /mnt/foo xfs_io -c "pwrite -S 0x53 -b 9216 260848797 9216" /mnt/foo xfs_io -c "pwrite -S 0x54 -b 39936 119461243 39936" /mnt/foo xfs_io -c "pwrite -S 0x55 -b 7000 200178693 7000" /mnt/foo xfs_io -c "pwrite -S 0x56 -b 9216 243316029 9216" /mnt/foo xfs_io -c "pwrite -S 0x57 -b 7000 209658229 7000" /mnt/foo xfs_io -c "pwrite -S 0x58 -b 101376 179745192 101376" /mnt/foo xfs_io -c "pwrite -S 0x59 -b 9216 64012300 9216" /mnt/foo xfs_io -c "pwrite -S 0x60 -b 125952 181705139 125952" /mnt/foo xfs_io -c "pwrite -S 0x61 -b 23552 235737348 23552" /mnt/foo xfs_io -c "pwrite -S 0x62 -b 113664 106021355 113664" /mnt/foo xfs_io -c "pwrite -S 0x63 -b 67584 135753552 67584" /mnt/foo xfs_io -c "pwrite -S 0x64 -b 23552 95730888 23552" /mnt/foo xfs_io -c "pwrite -S 0x65 -b 11 17311415 11" /mnt/foo xfs_io -c "pwrite -S 0x66 -b 33792 120695553 33792" /mnt/foo xfs_io -c "pwrite -S 0x67 -b 9216 17164631 9216" /mnt/foo xfs_io -c "pwrite -S 0x68 -b 9216 136065853 9216" /mnt/foo xfs_io -c "pwrite -S 0x69 -b 67584 37752198 67584" /mnt/foo xfs_io -c "pwrite -S 0x70 -b 101376 189717473 101376" /mnt/foo xfs_io -c "pwrite -S 0x71 -b 7000 227463698 7000" /mnt/foo xfs_io -c "pwrite -S 0x72 -b 9216 12655137 9216" /mnt/foo xfs_io -c "pwrite -S 0x73 -b 7000 7488866 7000" /mnt/foo xfs_io -c "pwrite -S 0x74 -b 113664 87813649 113664" /mnt/foo xfs_io -c "pwrite -S 0x75 -b 33792 25802183 33792" /mnt/foo xfs_io -c "pwrite -S 0x76 -b 39936 93524024 39936" /mnt/foo xfs_io -c "pwrite -S 0x77 -b 33792 113336388 33792" /mnt/foo xfs_io -c "pwrite -S 0x78 -b 105472 184955320 105472" /mnt/foo xfs_io -c "pwrite -S 0x79 -b 101376 225691598 101376" /mnt/foo xfs_io -c "pwrite -S 0x80 -b 23552 77023155 23552" /mnt/foo xfs_io -c "pwrite -S 0x81 -b 11 201888192 11" /mnt/foo xfs_io -c "pwrite -S 0x82 -b 11 115332492 11" /mnt/foo xfs_io -c "pwrite -S 0x83 -b 67584 230278015 67584" /mnt/foo xfs_io -c "pwrite -S 0x84 -b 11 120589073 11" /mnt/foo xfs_io -c "pwrite -S 0x85 -b 125952 202207819 125952" /mnt/foo xfs_io -c "pwrite -S 0x86 -b 113664 86672080 113664" /mnt/foo xfs_io -c "pwrite -S 0x87 -b 17408 208459603 17408" /mnt/foo xfs_io -c "pwrite -S 0x88 -b 7000 73372211 7000" /mnt/foo xfs_io -c "pwrite -S 0x89 -b 7000 42252122 7000" /mnt/foo xfs_io -c "pwrite -S 0x90 -b 23552 46784881 23552" /mnt/foo xfs_io -c "pwrite -S 0x91 -b 101376 63172351 101376" /mnt/foo xfs_io -c "pwrite -S 0x92 -b 23552 59341931 23552" /mnt/foo xfs_io -c "pwrite -S 0x93 -b 39936 239599283 39936" /mnt/foo xfs_io -c "pwrite -S 0x94 -b 67584 175643105 67584" /mnt/foo xfs_io -c "pwrite -S 0x97 -b 23552 105534880 23552" /mnt/foo xfs_io -c "pwrite -S 0x98 -b 113664 8236844 113664" /mnt/foo xfs_io -c "pwrite -S 0x99 -b 125952 144489686 125952" /mnt/foo xfs_io -c "pwrite -S 0xa0 -b 7000 73273112 7000" /mnt/foo xfs_io -c "pwrite -S 0xa1 -b 125952 194580243 125952" /mnt/foo xfs_io -c "pwrite -S 0xa2 -b 123 56296779 123" /mnt/foo xfs_io -c "pwrite -S 0xa3 -b 11 233066845 11" /mnt/foo xfs_io -c "pwrite -S 0xa4 -b 39936 197727090 39936" /mnt/foo xfs_io -c "pwrite -S 0xa5 -b 101376 53579812 101376" /mnt/foo xfs_io -c "pwrite -S 0xa6 -b 9216 85669738 9216" /mnt/foo xfs_io -c "pwrite -S 0xa7 -b 125952 21266322 125952" /mnt/foo xfs_io -c "pwrite -S 0xa8 -b 23552 125726568 23552" /mnt/foo xfs_io -c "pwrite -S 0xa9 -b 9216 18423680 9216" /mnt/foo xfs_io -c "pwrite -S 0xb0 -b 1121 165901483 1121" /mnt/foo btrfs subvolume snapshot -r /mnt /mnt/mysnap1 xfs_io -c "pwrite -S 0xff -b 10 16190218 10" /mnt/foo btrfs subvolume snapshot -r /mnt /mnt/mysnap2 md5sum /mnt/foo # returns 79e53f1466bfc09fd82b450689e6119e md5sum /mnt/mysnap2/foo # returns 79e53f1466bfc09fd82b450689e6119e too btrfs send /mnt/mysnap1 -f /tmp/1.snap btrfs send -p /mnt/mysnap1 /mnt/mysnap2 -f /tmp/2.snap mkfs.btrfs -f /dev/sdc mount /dev/sdc /mnt btrfs receive /mnt -f /tmp/1.snap btrfs receive /mnt -f /tmp/2.snap md5sum /mnt/mysnap2/foo # returns 2bb414c5155767cedccd7063e51beabd !! A testcase for xfstests follows soon too. Signed-off-by: Filipe David Borba Manana <fdmanana@gmail.com> Signed-off-by: Chris Mason <clm@fb.com>
2014-03-30 23:02:53 +01:00
Btrfs: incompatible format change to remove hole extents Btrfs has always had these filler extent data items for holes in inodes. This has made somethings very easy, like logging hole punches and sending hole punches. However for large holey files these extent data items are pure overhead. So add an incompatible feature to no longer add hole extents to reduce the amount of metadata used by these sort of files. This has a few changes for logging and send obviously since they will need to detect holes and log/send the holes if there are any. I've tested this thoroughly with xfstests and it doesn't cause any issues with and without the incompat format set. Thanks, Signed-off-by: Josef Bacik <jbacik@fusionio.com> Signed-off-by: Chris Mason <clm@fb.com>
2013-10-22 12:18:51 -04:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: fix infinite path build loops in incremental send The send operation processes inodes by their ascending number, and assumes that any rename/move operation can be successfully performed (sent to the caller) once all previous inodes (those with a smaller inode number than the one we're currently processing) were processed. This is not true when an incremental send had to process an hierarchical change between 2 snapshots where the parent-children relationship between directory inodes was reversed - that is, parents became children and children became parents. This situation made the path building code go into an infinite loop, which kept allocating more and more memory that eventually lead to a krealloc warning being displayed in dmesg: WARNING: CPU: 1 PID: 5705 at mm/page_alloc.c:2477 __alloc_pages_nodemask+0x365/0xad0() Modules linked in: btrfs raid6_pq xor pci_stub vboxpci(O) vboxnetadp(O) vboxnetflt(O) vboxdrv(O) snd_hda_codec_hdmi snd_hda_codec_realtek joydev radeon snd_hda_intel snd_hda_codec snd_hwdep snd_seq_midi snd_pcm psmouse i915 snd_rawmidi serio_raw snd_seq_midi_event lpc_ich snd_seq snd_timer ttm snd_seq_device rfcomm drm_kms_helper parport_pc bnep bluetooth drm ppdev snd soundcore i2c_algo_bit snd_page_alloc binfmt_misc video lp parport r8169 mii hid_generic usbhid hid CPU: 1 PID: 5705 Comm: btrfs Tainted: G O 3.13.0-rc7-fdm-btrfs-next-18+ #3 Hardware name: To Be Filled By O.E.M. To Be Filled By O.E.M./Z77 Pro4, BIOS P1.50 09/04/2012 [ 5381.660441] 00000000000009ad ffff8806f6f2f4e8 ffffffff81777434 0000000000000007 [ 5381.660447] 0000000000000000 ffff8806f6f2f528 ffffffff8104a9ec ffff8807038f36f0 [ 5381.660452] 0000000000000000 0000000000000206 ffff8807038f2490 ffff8807038f36f0 [ 5381.660457] Call Trace: [ 5381.660464] [<ffffffff81777434>] dump_stack+0x4e/0x68 [ 5381.660471] [<ffffffff8104a9ec>] warn_slowpath_common+0x8c/0xc0 [ 5381.660476] [<ffffffff8104aa3a>] warn_slowpath_null+0x1a/0x20 [ 5381.660480] [<ffffffff81144995>] __alloc_pages_nodemask+0x365/0xad0 [ 5381.660487] [<ffffffff8108313f>] ? local_clock+0x4f/0x60 [ 5381.660491] [<ffffffff811430e8>] ? free_one_page+0x98/0x440 [ 5381.660495] [<ffffffff8108313f>] ? local_clock+0x4f/0x60 [ 5381.660502] [<ffffffff8113fae4>] ? __get_free_pages+0x14/0x50 [ 5381.660508] [<ffffffff81095fb8>] ? trace_hardirqs_off_caller+0x28/0xd0 [ 5381.660515] [<ffffffff81183caf>] alloc_pages_current+0x10f/0x1f0 [ 5381.660520] [<ffffffff8113fae4>] ? __get_free_pages+0x14/0x50 [ 5381.660524] [<ffffffff8113fae4>] __get_free_pages+0x14/0x50 [ 5381.660530] [<ffffffff8115dace>] kmalloc_order_trace+0x3e/0x100 [ 5381.660536] [<ffffffff81191ea0>] __kmalloc_track_caller+0x220/0x230 [ 5381.660560] [<ffffffffa0729fdb>] ? fs_path_ensure_buf.part.12+0x6b/0x200 [btrfs] [ 5381.660564] [<ffffffff8178085c>] ? retint_restore_args+0xe/0xe [ 5381.660569] [<ffffffff811580ef>] krealloc+0x6f/0xb0 [ 5381.660586] [<ffffffffa0729fdb>] fs_path_ensure_buf.part.12+0x6b/0x200 [btrfs] [ 5381.660601] [<ffffffffa072a208>] fs_path_prepare_for_add+0x98/0xb0 [btrfs] [ 5381.660615] [<ffffffffa072a2bc>] fs_path_add_path+0x2c/0x60 [btrfs] [ 5381.660628] [<ffffffffa072c55c>] get_cur_path+0x7c/0x1c0 [btrfs] Even without this loop, the incremental send couldn't succeed, because it would attempt to send a rename/move operation for the lower inode before the highest inode number was renamed/move. This issue is easy to trigger with the following steps: $ mkfs.btrfs -f /dev/sdb3 $ mount /dev/sdb3 /mnt/btrfs $ mkdir -p /mnt/btrfs/a/b/c/d $ mkdir /mnt/btrfs/a/b/c2 $ btrfs subvol snapshot -r /mnt/btrfs /mnt/btrfs/snap1 $ mv /mnt/btrfs/a/b/c/d /mnt/btrfs/a/b/c2/d2 $ mv /mnt/btrfs/a/b/c /mnt/btrfs/a/b/c2/d2/cc $ btrfs subvol snapshot -r /mnt/btrfs /mnt/btrfs/snap2 $ btrfs send -p /mnt/btrfs/snap1 /mnt/btrfs/snap2 > /tmp/incremental.send The structure of the filesystem when the first snapshot is taken is: . (ino 256) |-- a (ino 257) |-- b (ino 258) |-- c (ino 259) | |-- d (ino 260) | |-- c2 (ino 261) And its structure when the second snapshot is taken is: . (ino 256) |-- a (ino 257) |-- b (ino 258) |-- c2 (ino 261) |-- d2 (ino 260) |-- cc (ino 259) Before the move/rename operation is performed for the inode 259, the move/rename for inode 260 must be performed, since 259 is now a child of 260. A test case for xfstests, with a more complex scenario, will follow soon. Signed-off-by: Filipe David Borba Manana <fdmanana@gmail.com> Signed-off-by: Josef Bacik <jbacik@fb.com> Signed-off-by: Chris Mason <clm@fb.com>
2014-01-22 10:00:53 +00:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: fix infinite path build loops in incremental send The send operation processes inodes by their ascending number, and assumes that any rename/move operation can be successfully performed (sent to the caller) once all previous inodes (those with a smaller inode number than the one we're currently processing) were processed. This is not true when an incremental send had to process an hierarchical change between 2 snapshots where the parent-children relationship between directory inodes was reversed - that is, parents became children and children became parents. This situation made the path building code go into an infinite loop, which kept allocating more and more memory that eventually lead to a krealloc warning being displayed in dmesg: WARNING: CPU: 1 PID: 5705 at mm/page_alloc.c:2477 __alloc_pages_nodemask+0x365/0xad0() Modules linked in: btrfs raid6_pq xor pci_stub vboxpci(O) vboxnetadp(O) vboxnetflt(O) vboxdrv(O) snd_hda_codec_hdmi snd_hda_codec_realtek joydev radeon snd_hda_intel snd_hda_codec snd_hwdep snd_seq_midi snd_pcm psmouse i915 snd_rawmidi serio_raw snd_seq_midi_event lpc_ich snd_seq snd_timer ttm snd_seq_device rfcomm drm_kms_helper parport_pc bnep bluetooth drm ppdev snd soundcore i2c_algo_bit snd_page_alloc binfmt_misc video lp parport r8169 mii hid_generic usbhid hid CPU: 1 PID: 5705 Comm: btrfs Tainted: G O 3.13.0-rc7-fdm-btrfs-next-18+ #3 Hardware name: To Be Filled By O.E.M. To Be Filled By O.E.M./Z77 Pro4, BIOS P1.50 09/04/2012 [ 5381.660441] 00000000000009ad ffff8806f6f2f4e8 ffffffff81777434 0000000000000007 [ 5381.660447] 0000000000000000 ffff8806f6f2f528 ffffffff8104a9ec ffff8807038f36f0 [ 5381.660452] 0000000000000000 0000000000000206 ffff8807038f2490 ffff8807038f36f0 [ 5381.660457] Call Trace: [ 5381.660464] [<ffffffff81777434>] dump_stack+0x4e/0x68 [ 5381.660471] [<ffffffff8104a9ec>] warn_slowpath_common+0x8c/0xc0 [ 5381.660476] [<ffffffff8104aa3a>] warn_slowpath_null+0x1a/0x20 [ 5381.660480] [<ffffffff81144995>] __alloc_pages_nodemask+0x365/0xad0 [ 5381.660487] [<ffffffff8108313f>] ? local_clock+0x4f/0x60 [ 5381.660491] [<ffffffff811430e8>] ? free_one_page+0x98/0x440 [ 5381.660495] [<ffffffff8108313f>] ? local_clock+0x4f/0x60 [ 5381.660502] [<ffffffff8113fae4>] ? __get_free_pages+0x14/0x50 [ 5381.660508] [<ffffffff81095fb8>] ? trace_hardirqs_off_caller+0x28/0xd0 [ 5381.660515] [<ffffffff81183caf>] alloc_pages_current+0x10f/0x1f0 [ 5381.660520] [<ffffffff8113fae4>] ? __get_free_pages+0x14/0x50 [ 5381.660524] [<ffffffff8113fae4>] __get_free_pages+0x14/0x50 [ 5381.660530] [<ffffffff8115dace>] kmalloc_order_trace+0x3e/0x100 [ 5381.660536] [<ffffffff81191ea0>] __kmalloc_track_caller+0x220/0x230 [ 5381.660560] [<ffffffffa0729fdb>] ? fs_path_ensure_buf.part.12+0x6b/0x200 [btrfs] [ 5381.660564] [<ffffffff8178085c>] ? retint_restore_args+0xe/0xe [ 5381.660569] [<ffffffff811580ef>] krealloc+0x6f/0xb0 [ 5381.660586] [<ffffffffa0729fdb>] fs_path_ensure_buf.part.12+0x6b/0x200 [btrfs] [ 5381.660601] [<ffffffffa072a208>] fs_path_prepare_for_add+0x98/0xb0 [btrfs] [ 5381.660615] [<ffffffffa072a2bc>] fs_path_add_path+0x2c/0x60 [btrfs] [ 5381.660628] [<ffffffffa072c55c>] get_cur_path+0x7c/0x1c0 [btrfs] Even without this loop, the incremental send couldn't succeed, because it would attempt to send a rename/move operation for the lower inode before the highest inode number was renamed/move. This issue is easy to trigger with the following steps: $ mkfs.btrfs -f /dev/sdb3 $ mount /dev/sdb3 /mnt/btrfs $ mkdir -p /mnt/btrfs/a/b/c/d $ mkdir /mnt/btrfs/a/b/c2 $ btrfs subvol snapshot -r /mnt/btrfs /mnt/btrfs/snap1 $ mv /mnt/btrfs/a/b/c/d /mnt/btrfs/a/b/c2/d2 $ mv /mnt/btrfs/a/b/c /mnt/btrfs/a/b/c2/d2/cc $ btrfs subvol snapshot -r /mnt/btrfs /mnt/btrfs/snap2 $ btrfs send -p /mnt/btrfs/snap1 /mnt/btrfs/snap2 > /tmp/incremental.send The structure of the filesystem when the first snapshot is taken is: . (ino 256) |-- a (ino 257) |-- b (ino 258) |-- c (ino 259) | |-- d (ino 260) | |-- c2 (ino 261) And its structure when the second snapshot is taken is: . (ino 256) |-- a (ino 257) |-- b (ino 258) |-- c2 (ino 261) |-- d2 (ino 260) |-- cc (ino 259) Before the move/rename operation is performed for the inode 259, the move/rename for inode 260 must be performed, since 259 is now a child of 260. A test case for xfstests, with a more complex scenario, will follow soon. Signed-off-by: Filipe David Borba Manana <fdmanana@gmail.com> Signed-off-by: Josef Bacik <jbacik@fb.com> Signed-off-by: Chris Mason <clm@fb.com>
2014-01-22 10:00:53 +00:00
Btrfs: avoid unnecessary utimes update in incremental send When we're finishing processing of an inode, if we're dealing with a directory inode that has a pending move/rename operation, we don't need to send a utimes update instruction to the send stream, as we'll do it later after doing the move/rename operation. Therefore we save some time here building paths and doing btree lookups. Signed-off-by: Filipe David Borba Manana <fdmanana@gmail.com> Signed-off-by: Josef Bacik <jbacik@fb.com>
2014-03-03 12:28:40 +00:00
Btrfs: fix infinite path build loops in incremental send The send operation processes inodes by their ascending number, and assumes that any rename/move operation can be successfully performed (sent to the caller) once all previous inodes (those with a smaller inode number than the one we're currently processing) were processed. This is not true when an incremental send had to process an hierarchical change between 2 snapshots where the parent-children relationship between directory inodes was reversed - that is, parents became children and children became parents. This situation made the path building code go into an infinite loop, which kept allocating more and more memory that eventually lead to a krealloc warning being displayed in dmesg: WARNING: CPU: 1 PID: 5705 at mm/page_alloc.c:2477 __alloc_pages_nodemask+0x365/0xad0() Modules linked in: btrfs raid6_pq xor pci_stub vboxpci(O) vboxnetadp(O) vboxnetflt(O) vboxdrv(O) snd_hda_codec_hdmi snd_hda_codec_realtek joydev radeon snd_hda_intel snd_hda_codec snd_hwdep snd_seq_midi snd_pcm psmouse i915 snd_rawmidi serio_raw snd_seq_midi_event lpc_ich snd_seq snd_timer ttm snd_seq_device rfcomm drm_kms_helper parport_pc bnep bluetooth drm ppdev snd soundcore i2c_algo_bit snd_page_alloc binfmt_misc video lp parport r8169 mii hid_generic usbhid hid CPU: 1 PID: 5705 Comm: btrfs Tainted: G O 3.13.0-rc7-fdm-btrfs-next-18+ #3 Hardware name: To Be Filled By O.E.M. To Be Filled By O.E.M./Z77 Pro4, BIOS P1.50 09/04/2012 [ 5381.660441] 00000000000009ad ffff8806f6f2f4e8 ffffffff81777434 0000000000000007 [ 5381.660447] 0000000000000000 ffff8806f6f2f528 ffffffff8104a9ec ffff8807038f36f0 [ 5381.660452] 0000000000000000 0000000000000206 ffff8807038f2490 ffff8807038f36f0 [ 5381.660457] Call Trace: [ 5381.660464] [<ffffffff81777434>] dump_stack+0x4e/0x68 [ 5381.660471] [<ffffffff8104a9ec>] warn_slowpath_common+0x8c/0xc0 [ 5381.660476] [<ffffffff8104aa3a>] warn_slowpath_null+0x1a/0x20 [ 5381.660480] [<ffffffff81144995>] __alloc_pages_nodemask+0x365/0xad0 [ 5381.660487] [<ffffffff8108313f>] ? local_clock+0x4f/0x60 [ 5381.660491] [<ffffffff811430e8>] ? free_one_page+0x98/0x440 [ 5381.660495] [<ffffffff8108313f>] ? local_clock+0x4f/0x60 [ 5381.660502] [<ffffffff8113fae4>] ? __get_free_pages+0x14/0x50 [ 5381.660508] [<ffffffff81095fb8>] ? trace_hardirqs_off_caller+0x28/0xd0 [ 5381.660515] [<ffffffff81183caf>] alloc_pages_current+0x10f/0x1f0 [ 5381.660520] [<ffffffff8113fae4>] ? __get_free_pages+0x14/0x50 [ 5381.660524] [<ffffffff8113fae4>] __get_free_pages+0x14/0x50 [ 5381.660530] [<ffffffff8115dace>] kmalloc_order_trace+0x3e/0x100 [ 5381.660536] [<ffffffff81191ea0>] __kmalloc_track_caller+0x220/0x230 [ 5381.660560] [<ffffffffa0729fdb>] ? fs_path_ensure_buf.part.12+0x6b/0x200 [btrfs] [ 5381.660564] [<ffffffff8178085c>] ? retint_restore_args+0xe/0xe [ 5381.660569] [<ffffffff811580ef>] krealloc+0x6f/0xb0 [ 5381.660586] [<ffffffffa0729fdb>] fs_path_ensure_buf.part.12+0x6b/0x200 [btrfs] [ 5381.660601] [<ffffffffa072a208>] fs_path_prepare_for_add+0x98/0xb0 [btrfs] [ 5381.660615] [<ffffffffa072a2bc>] fs_path_add_path+0x2c/0x60 [btrfs] [ 5381.660628] [<ffffffffa072c55c>] get_cur_path+0x7c/0x1c0 [btrfs] Even without this loop, the incremental send couldn't succeed, because it would attempt to send a rename/move operation for the lower inode before the highest inode number was renamed/move. This issue is easy to trigger with the following steps: $ mkfs.btrfs -f /dev/sdb3 $ mount /dev/sdb3 /mnt/btrfs $ mkdir -p /mnt/btrfs/a/b/c/d $ mkdir /mnt/btrfs/a/b/c2 $ btrfs subvol snapshot -r /mnt/btrfs /mnt/btrfs/snap1 $ mv /mnt/btrfs/a/b/c/d /mnt/btrfs/a/b/c2/d2 $ mv /mnt/btrfs/a/b/c /mnt/btrfs/a/b/c2/d2/cc $ btrfs subvol snapshot -r /mnt/btrfs /mnt/btrfs/snap2 $ btrfs send -p /mnt/btrfs/snap1 /mnt/btrfs/snap2 > /tmp/incremental.send The structure of the filesystem when the first snapshot is taken is: . (ino 256) |-- a (ino 257) |-- b (ino 258) |-- c (ino 259) | |-- d (ino 260) | |-- c2 (ino 261) And its structure when the second snapshot is taken is: . (ino 256) |-- a (ino 257) |-- b (ino 258) |-- c2 (ino 261) |-- d2 (ino 260) |-- cc (ino 259) Before the move/rename operation is performed for the inode 259, the move/rename for inode 260 must be performed, since 259 is now a child of 260. A test case for xfstests, with a more complex scenario, will follow soon. Signed-off-by: Filipe David Borba Manana <fdmanana@gmail.com> Signed-off-by: Josef Bacik <jbacik@fb.com> Signed-off-by: Chris Mason <clm@fb.com>
2014-01-22 10:00:53 +00:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: incompatible format change to remove hole extents Btrfs has always had these filler extent data items for holes in inodes. This has made somethings very easy, like logging hole punches and sending hole punches. However for large holey files these extent data items are pure overhead. So add an incompatible feature to no longer add hole extents to reduce the amount of metadata used by these sort of files. This has a few changes for logging and send obviously since they will need to detect holes and log/send the holes if there are any. I've tested this thoroughly with xfstests and it doesn't cause any issues with and without the incompat format set. Thanks, Signed-off-by: Josef Bacik <jbacik@fusionio.com> Signed-off-by: Chris Mason <clm@fb.com>
2013-10-22 12:18:51 -04:00
Btrfs: update send_progress at correct places Updating send_progress in process_recorded_refs was not correct. It got updated too early in the cur_inode_new_gen case. Reported-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com> Reported-by: Arne Jansen <sensille@gmx.net> Signed-off-by: Alexander Block <ablock84@googlemail.com>
2012-07-28 16:09:35 +02:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: don't treat top/root directory inode as deleted/reused We can't do the deleted/reused logic for top/root inodes as it would create a stream that tries to delete and recreate the root dir. Reported-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com> Signed-off-by: Alexander Block <ablock84@googlemail.com>
2012-08-01 14:48:59 +02:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: skip search tree for REG files It is really unnecessary to search tree again for @gen, @mode and @rdev in the case of REG inodes' creation, as we've got btrfs_inode_item in sctx, and @gen, @mode and @rdev can easily be fetched. Signed-off-by: Liu Bo <bo.li.liu@oracle.com> Signed-off-by: Josef Bacik <jbacik@fb.com>
2014-02-27 17:29:01 +08:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: fix cur_ino < parent_ino case for send/receive When the current inodes inum is smaller then the inum of the parent directory strange things were happending due to wrong path resolution and other bugs. Fix this with a new approach for the problem. Reported-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com> Signed-off-by: Alexander Block <ablock84@googlemail.com>
2012-07-28 10:42:24 +02:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: add/fix comments/documentation for send/receive As the subject already said, add/fix comments. Signed-off-by: Alexander Block <ablock84@googlemail.com>
2012-07-28 14:11:31 +02:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: add/fix comments/documentation for send/receive As the subject already said, add/fix comments. Signed-off-by: Alexander Block <ablock84@googlemail.com>
2012-07-28 14:11:31 +02:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: add/fix comments/documentation for send/receive As the subject already said, add/fix comments. Signed-off-by: Alexander Block <ablock84@googlemail.com>
2012-07-28 14:11:31 +02:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: skip search tree for REG files It is really unnecessary to search tree again for @gen, @mode and @rdev in the case of REG inodes' creation, as we've got btrfs_inode_item in sctx, and @gen, @mode and @rdev can easily be fetched. Signed-off-by: Liu Bo <bo.li.liu@oracle.com> Signed-off-by: Josef Bacik <jbacik@fb.com>
2014-02-27 17:29:01 +08:00
Btrfs: fix cur_ino < parent_ino case for send/receive When the current inodes inum is smaller then the inum of the parent directory strange things were happending due to wrong path resolution and other bugs. Fix this with a new approach for the problem. Reported-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com> Signed-off-by: Alexander Block <ablock84@googlemail.com>
2012-07-28 10:42:24 +02:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: update send_progress at correct places Updating send_progress in process_recorded_refs was not correct. It got updated too early in the cur_inode_new_gen case. Reported-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com> Reported-by: Arne Jansen <sensille@gmx.net> Signed-off-by: Alexander Block <ablock84@googlemail.com>
2012-07-28 16:09:35 +02:00
Btrfs: add/fix comments/documentation for send/receive As the subject already said, add/fix comments. Signed-off-by: Alexander Block <ablock84@googlemail.com>
2012-07-28 14:11:31 +02:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: add/fix comments/documentation for send/receive As the subject already said, add/fix comments. Signed-off-by: Alexander Block <ablock84@googlemail.com>
2012-07-28 14:11:31 +02:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: add/fix comments/documentation for send/receive As the subject already said, add/fix comments. Signed-off-by: Alexander Block <ablock84@googlemail.com>
2012-07-28 14:11:31 +02:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: add/fix comments/documentation for send/receive As the subject already said, add/fix comments. Signed-off-by: Alexander Block <ablock84@googlemail.com>
2012-07-28 14:11:31 +02:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: fix send issues related to inode number reuse If you are sending a snapshot and specifying a parent snapshot we will walk the trees and figure out where they differ and send the differences only. The way we check for differences are if the leaves aren't the same and if the keys are not the same within the leaves. So if neither leaf is the same (ie the leaf has been cow'ed from the parent snapshot) we walk each item in the send root and check it against the parent root. If the items match exactly then we don't do anything. This doesn't quite work for inode refs, since they will just have the name and the parent objectid. If you move the file from a directory and then remove that directory and re-create a directory with the same inode number as the old directory and then move that file back into that directory we will assume that nothing changed and you will get errors when you try to receive. In order to fix this we need to do extra checking to see if the inode ref really is the same or not. So do this by passing down BTRFS_COMPARE_TREE_SAME if the items match. Then if the key type is an inode ref we can do some extra checking, otherwise we just keep processing. The extra checking is to look up the generation of the directory in the parent volume and compare it to the generation of the send volume. If they match then they are the same directory and we are good to go. If they don't we have to add them to the changed refs list. This means we have to track the generation of the ref we're trying to lookup when we iterate all the refs for a particular inode. So in the case of looking for new refs we have to get the generation from the parent volume, and in the case of looking for deleted refs we have to get the generation from the send volume to compare with. There was also the issue of using a ulist to keep track of the directories we needed to check. Because we can get a deleted ref and a new ref for the same inode number the ulist won't work since it indexes based on the value. So instead just dup any directory ref we find and add it to a local list, and then process that list as normal and do away with using a ulist for this altogether. Before we would fail all of the tests in the far-progs that related to moving directories (test group 32). With this patch we now pass these tests, and all of the tests in the far-progs send testing suite. Thanks, Signed-off-by: Josef Bacik <jbacik@fusionio.com> Signed-off-by: Chris Mason <chris.mason@fusionio.com>
2013-08-16 16:52:55 -04:00
Btrfs: add/fix comments/documentation for send/receive As the subject already said, add/fix comments. Signed-off-by: Alexander Block <ablock84@googlemail.com>
2012-07-28 14:11:31 +02:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: fix send issues related to inode number reuse If you are sending a snapshot and specifying a parent snapshot we will walk the trees and figure out where they differ and send the differences only. The way we check for differences are if the leaves aren't the same and if the keys are not the same within the leaves. So if neither leaf is the same (ie the leaf has been cow'ed from the parent snapshot) we walk each item in the send root and check it against the parent root. If the items match exactly then we don't do anything. This doesn't quite work for inode refs, since they will just have the name and the parent objectid. If you move the file from a directory and then remove that directory and re-create a directory with the same inode number as the old directory and then move that file back into that directory we will assume that nothing changed and you will get errors when you try to receive. In order to fix this we need to do extra checking to see if the inode ref really is the same or not. So do this by passing down BTRFS_COMPARE_TREE_SAME if the items match. Then if the key type is an inode ref we can do some extra checking, otherwise we just keep processing. The extra checking is to look up the generation of the directory in the parent volume and compare it to the generation of the send volume. If they match then they are the same directory and we are good to go. If they don't we have to add them to the changed refs list. This means we have to track the generation of the ref we're trying to lookup when we iterate all the refs for a particular inode. So in the case of looking for new refs we have to get the generation from the parent volume, and in the case of looking for deleted refs we have to get the generation from the send volume to compare with. There was also the issue of using a ulist to keep track of the directories we needed to check. Because we can get a deleted ref and a new ref for the same inode number the ulist won't work since it indexes based on the value. So instead just dup any directory ref we find and add it to a local list, and then process that list as normal and do away with using a ulist for this altogether. Before we would fail all of the tests in the far-progs that related to moving directories (test group 32). With this patch we now pass these tests, and all of the tests in the far-progs send testing suite. Thanks, Signed-off-by: Josef Bacik <jbacik@fusionio.com> Signed-off-by: Chris Mason <chris.mason@fusionio.com>
2013-08-16 16:52:55 -04:00
Btrfs: incompatible format change to remove hole extents Btrfs has always had these filler extent data items for holes in inodes. This has made somethings very easy, like logging hole punches and sending hole punches. However for large holey files these extent data items are pure overhead. So add an incompatible feature to no longer add hole extents to reduce the amount of metadata used by these sort of files. This has a few changes for logging and send obviously since they will need to detect holes and log/send the holes if there are any. I've tested this thoroughly with xfstests and it doesn't cause any issues with and without the incompat format set. Thanks, Signed-off-by: Josef Bacik <jbacik@fusionio.com> Signed-off-by: Chris Mason <clm@fb.com>
2013-10-22 12:18:51 -04:00
Btrfs: fix send issues related to inode number reuse If you are sending a snapshot and specifying a parent snapshot we will walk the trees and figure out where they differ and send the differences only. The way we check for differences are if the leaves aren't the same and if the keys are not the same within the leaves. So if neither leaf is the same (ie the leaf has been cow'ed from the parent snapshot) we walk each item in the send root and check it against the parent root. If the items match exactly then we don't do anything. This doesn't quite work for inode refs, since they will just have the name and the parent objectid. If you move the file from a directory and then remove that directory and re-create a directory with the same inode number as the old directory and then move that file back into that directory we will assume that nothing changed and you will get errors when you try to receive. In order to fix this we need to do extra checking to see if the inode ref really is the same or not. So do this by passing down BTRFS_COMPARE_TREE_SAME if the items match. Then if the key type is an inode ref we can do some extra checking, otherwise we just keep processing. The extra checking is to look up the generation of the directory in the parent volume and compare it to the generation of the send volume. If they match then they are the same directory and we are good to go. If they don't we have to add them to the changed refs list. This means we have to track the generation of the ref we're trying to lookup when we iterate all the refs for a particular inode. So in the case of looking for new refs we have to get the generation from the parent volume, and in the case of looking for deleted refs we have to get the generation from the send volume to compare with. There was also the issue of using a ulist to keep track of the directories we needed to check. Because we can get a deleted ref and a new ref for the same inode number the ulist won't work since it indexes based on the value. So instead just dup any directory ref we find and add it to a local list, and then process that list as normal and do away with using a ulist for this altogether. Before we would fail all of the tests in the far-progs that related to moving directories (test group 32). With this patch we now pass these tests, and all of the tests in the far-progs send testing suite. Thanks, Signed-off-by: Josef Bacik <jbacik@fusionio.com> Signed-off-by: Chris Mason <chris.mason@fusionio.com>
2013-08-16 16:52:55 -04:00
Btrfs: incompatible format change to remove hole extents Btrfs has always had these filler extent data items for holes in inodes. This has made somethings very easy, like logging hole punches and sending hole punches. However for large holey files these extent data items are pure overhead. So add an incompatible feature to no longer add hole extents to reduce the amount of metadata used by these sort of files. This has a few changes for logging and send obviously since they will need to detect holes and log/send the holes if there are any. I've tested this thoroughly with xfstests and it doesn't cause any issues with and without the incompat format set. Thanks, Signed-off-by: Josef Bacik <jbacik@fusionio.com> Signed-off-by: Chris Mason <clm@fb.com>
2013-10-22 12:18:51 -04:00
Btrfs: fix send issues related to inode number reuse If you are sending a snapshot and specifying a parent snapshot we will walk the trees and figure out where they differ and send the differences only. The way we check for differences are if the leaves aren't the same and if the keys are not the same within the leaves. So if neither leaf is the same (ie the leaf has been cow'ed from the parent snapshot) we walk each item in the send root and check it against the parent root. If the items match exactly then we don't do anything. This doesn't quite work for inode refs, since they will just have the name and the parent objectid. If you move the file from a directory and then remove that directory and re-create a directory with the same inode number as the old directory and then move that file back into that directory we will assume that nothing changed and you will get errors when you try to receive. In order to fix this we need to do extra checking to see if the inode ref really is the same or not. So do this by passing down BTRFS_COMPARE_TREE_SAME if the items match. Then if the key type is an inode ref we can do some extra checking, otherwise we just keep processing. The extra checking is to look up the generation of the directory in the parent volume and compare it to the generation of the send volume. If they match then they are the same directory and we are good to go. If they don't we have to add them to the changed refs list. This means we have to track the generation of the ref we're trying to lookup when we iterate all the refs for a particular inode. So in the case of looking for new refs we have to get the generation from the parent volume, and in the case of looking for deleted refs we have to get the generation from the send volume to compare with. There was also the issue of using a ulist to keep track of the directories we needed to check. Because we can get a deleted ref and a new ref for the same inode number the ulist won't work since it indexes based on the value. So instead just dup any directory ref we find and add it to a local list, and then process that list as normal and do away with using a ulist for this altogether. Before we would fail all of the tests in the far-progs that related to moving directories (test group 32). With this patch we now pass these tests, and all of the tests in the far-progs send testing suite. Thanks, Signed-off-by: Josef Bacik <jbacik@fusionio.com> Signed-off-by: Chris Mason <chris.mason@fusionio.com>
2013-08-16 16:52:55 -04:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: ignore non-FS inodes for send/receive We have to ignore inode/space cache objects in send/receive. Reported-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com> Signed-off-by: Alexander Block <ablock84@googlemail.com>
2012-08-01 14:47:03 +02:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: extended inode refs support for send mechanism This adds support for the new extended inode refs to btrfs send. Signed-off-by: Jan Schmidt <list.btrfs@jan-o-sch.net>
2012-10-15 08:30:45 +00:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: allow omitting stream header and end-cmd for btrfs send Two new flags are added to allow omitting the stream header and the end command for btrfs send streams. This is used in cases where you send multiple snapshots back-to-back in one stream. This used to be encoded like this (with 2 snapshots in this example): <stream header> + <sequence of commands> + <end cmd> + <stream header> + <sequence of commands> + <end cmd> + EOF The new format (if the two new flags are used) is this one: <stream header> + <sequence of commands> + <sequence of commands> + <end cmd> Note that the currently existing receivers treat <end cmd> only as an indication that a new <stream header> is following. This means, you can just skip the sequence <end cmd> <stream header> without loosing compatibility. As long as an EOF is following, the currently existing receivers handle the new format (if the two new flags are used) exactly as the old one. So what is the benefit of this change? The goal is to be able to use a single stream (one TCP connection) to multiplex a request/response handshake plus Btrfs send streams, all in the same stream. In this case you cannot evaluate an EOF condition as an end of the Btrfs send stream. You need something else, and the <end cmd> is just perfect for this purpose. The summary is: The format change is driven by the need to send several Btrfs send streams over a single TCP connections, with the ability for a repeated request/response handshake in the middle. And this format change does not break any existing tool, it is completely compatible. You could compare the old behaviour of the Btrfs send stream to the one of ftp where you need a seperate request/response channel and newly opened data transfer channels for each file, while the new behaviour is more like http using a single stream for everything. Signed-off-by: Stefan Behrens <sbehrens@giantdisaster.de> Signed-off-by: Josef Bacik <jbacik@fusionio.com>
2013-04-10 17:10:52 +00:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: ensure send always works on roots without orphans Move the logic from the snapshot creation ioctl into send. This avoids doing the transaction commit if send isn't used, and ensures that if a crash/reboot happens after the transaction commit that created the snapshot and before the transaction commit that switched the commit root, send will not get a commit root that differs from the main root (that has orphan items). Signed-off-by: Filipe Manana <fdmanana@suse.com> Signed-off-by: Chris Mason <clm@fb.com>
2014-10-21 11:11:41 +01:00
btrfs: check balance of send_in_progress Warn if the balance goes below zero, which appears to be unlikely though. Otherwise cleans up the code a bit. Signed-off-by: David Sterba <dsterba@suse.cz> Signed-off-by: Josef Bacik <jbacik@fb.com> Signed-off-by: Chris Mason <clm@fb.com>
2013-12-17 15:07:20 +01:00
btrfs: remove stale newlines from log messages I've noticed an extra line after "use no compression", but search revealed much more in messages of more critical levels and rare errors. Signed-off-by: David Sterba <dsterba@suse.cz> Signed-off-by: Chris Mason <clm@fb.com>
2014-05-15 16:48:20 +02:00
btrfs: check balance of send_in_progress Warn if the balance goes below zero, which appears to be unlikely though. Otherwise cleans up the code a bit. Signed-off-by: David Sterba <dsterba@suse.cz> Signed-off-by: Josef Bacik <jbacik@fb.com> Signed-off-by: Chris Mason <clm@fb.com>
2013-12-17 15:07:20 +01:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
btrfs: Check read-only status of roots during send All the subvolues that are involved in send must be read-only during the whole operation. The ioctl SUBVOL_SETFLAGS could be used to change the status to read-write and the result of send stream is undefined if the data change unexpectedly. Fix that by adding a refcount for all involved roots and verify that there's no send in progress during SUBVOL_SETFLAGS ioctl call that does read-only -> read-write transition. We need refcounts because there are no restrictions on number of send parallel operations currently run on a single subvolume, be it source, parent or one of the multiple clone sources. Kernel is silent when the RO checks fail and returns EPERM. The same set of checks is done already in userspace before send starts. Signed-off-by: David Sterba <dsterba@suse.cz> Signed-off-by: Josef Bacik <jbacik@fb.com> Signed-off-by: Chris Mason <clm@fb.com>
2013-12-16 17:34:17 +01:00
Btrfs: fix wrong send_in_progress accounting Steps to reproduce: # mkfs.btrfs -f /dev/sda8 # mount /dev/sda8 /mnt # btrfs sub snapshot -r /mnt /mnt/snap1 # btrfs sub snapshot -r /mnt /mnt/snap2 # btrfs send /mnt/snap1 -p /mnt/snap2 -f /mnt/1 # dmesg The problem is that we will sort clone roots(include @send_root), it might push @send_root before thus @send_root's @send_in_progress will be decreased twice. Cc: David Sterba <dsterba@suse.cz> Signed-off-by: Wang Shilong <wangsl.fnst@cn.fujitsu.com> Signed-off-by: Josef Bacik <jbacik@fb.com> Signed-off-by: Chris Mason <clm@fb.com>
2014-01-07 17:25:18 +08:00
Btrfs: fix protection between send and root deletion We should gurantee that parent and clone roots can not be destroyed during send, for this we have two ideas. 1.by holding @subvol_sem, this might be a nightmare, because it will block all subvolumes deletion for a long time. 2.Miao pointed out we can reuse @send_in_progress, that mean we will skip snapshot deletion if root sending is in progress. Here we adopt the second approach since it won't block other subvolumes deletion for a long time. Besides in btrfs_clean_one_deleted_snapshot(), we only check first root , if this root is involved in send, we return directly rather than continue to check.There are several reasons about it: 1.this case happen seldomly. 2.after sending,cleaner thread can continue to drop that root. 3.make code simple Cc: David Sterba <dsterba@suse.cz> Signed-off-by: Wang Shilong <wangsl.fnst@cn.fujitsu.com> Reviewed-by: Miao Xie <miaox@cn.fujitsu.com> Signed-off-by: Josef Bacik <jbacik@fb.com> Signed-off-by: Chris Mason <clm@fb.com>
2014-01-07 17:25:19 +08:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
new helper: file_inode(file) Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-01-23 17:07:38 -05:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
btrfs: Check read-only status of roots during send All the subvolues that are involved in send must be read-only during the whole operation. The ioctl SUBVOL_SETFLAGS could be used to change the status to read-write and the result of send stream is undefined if the data change unexpectedly. Fix that by adding a refcount for all involved roots and verify that there's no send in progress during SUBVOL_SETFLAGS ioctl call that does read-only -> read-write transition. We need refcounts because there are no restrictions on number of send parallel operations currently run on a single subvolume, be it source, parent or one of the multiple clone sources. Kernel is silent when the RO checks fail and returns EPERM. The same set of checks is done already in userspace before send starts. Signed-off-by: David Sterba <dsterba@suse.cz> Signed-off-by: Josef Bacik <jbacik@fb.com> Signed-off-by: Chris Mason <clm@fb.com>
2013-12-16 17:34:17 +01:00
btrfs: protect snapshots from deleting during send The patch "Btrfs: fix protection between send and root deletion" (18f687d538449373c37c) does not actually prevent to delete the snapshot and just takes care during background cleaning, but this seems rather user unfriendly, this patch implements the idea presented in http://www.spinics.net/lists/linux-btrfs/msg30813.html - add an internal root_item flag to denote a dead root - check if the send_in_progress is set and refuse to delete, otherwise set the flag and proceed - check the flag in send similar to the btrfs_root_readonly checks, for all involved roots The root lookup in send via btrfs_read_fs_root_no_name will check if the root is really dead or not. If it is, ENOENT, aborted send. If it's alive, it's protected by send_in_progress, send can continue. CC: Miao Xie <miaox@cn.fujitsu.com> CC: Wang Shilong <wangsl.fnst@cn.fujitsu.com> Signed-off-by: David Sterba <dsterba@suse.cz> Signed-off-by: Chris Mason <clm@fb.com>
2014-04-15 16:41:44 +02:00
btrfs: Check read-only status of roots during send All the subvolues that are involved in send must be read-only during the whole operation. The ioctl SUBVOL_SETFLAGS could be used to change the status to read-write and the result of send stream is undefined if the data change unexpectedly. Fix that by adding a refcount for all involved roots and verify that there's no send in progress during SUBVOL_SETFLAGS ioctl call that does read-only -> read-write transition. We need refcounts because there are no restrictions on number of send parallel operations currently run on a single subvolume, be it source, parent or one of the multiple clone sources. Kernel is silent when the RO checks fail and returns EPERM. The same set of checks is done already in userspace before send starts. Signed-off-by: David Sterba <dsterba@suse.cz> Signed-off-by: Josef Bacik <jbacik@fb.com> Signed-off-by: Chris Mason <clm@fb.com>
2013-12-16 17:34:17 +01:00
Btrfs: fix estale with btrfs send This fixes bugzilla 57491. If we take a snapshot of a fs with a unlink ongoing and then try to send that root we will run into problems. When comparing with a parent root we will search the parents and the send roots commit_root, which if we've just created the snapshot will include the file that needs to be evicted by the orphan cleanup. So when we find a changed extent we will try and copy that info into the send stream, but when we lookup the inode we use the normal root, which no longer has the inode because the orphan cleanup deleted it. The best solution I have for this is to check our otransid with the generation of the commit root and if they match just commit the transaction again, that way we get the changes from the orphan cleanup. With this patch the reproducer I made for this bugzilla no longer returns ESTALE when trying to do the send. Thanks, Cc: stable@vger.kernel.org Reported-by: Chris Wilson <jakdaw@gmail.com> Signed-off-by: Josef Bacik <jbacik@fusionio.com>
2013-05-20 11:26:50 -04:00
btrfs: Check read-only status of roots during send All the subvolues that are involved in send must be read-only during the whole operation. The ioctl SUBVOL_SETFLAGS could be used to change the status to read-write and the result of send stream is undefined if the data change unexpectedly. Fix that by adding a refcount for all involved roots and verify that there's no send in progress during SUBVOL_SETFLAGS ioctl call that does read-only -> read-write transition. We need refcounts because there are no restrictions on number of send parallel operations currently run on a single subvolume, be it source, parent or one of the multiple clone sources. Kernel is silent when the RO checks fail and returns EPERM. The same set of checks is done already in userspace before send starts. Signed-off-by: David Sterba <dsterba@suse.cz> Signed-off-by: Josef Bacik <jbacik@fb.com> Signed-off-by: Chris Mason <clm@fb.com>
2013-12-16 17:34:17 +01:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: fix access_ok() check in btrfs_ioctl_send() The closing parenthesis is in the wrong place. We want to check "sizeof(*arg->clone_sources) * arg->clone_sources_count" instead of "sizeof(*arg->clone_sources * arg->clone_sources_count)". Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Reviewed-by: Jie Liu <jeff.liu@oracle.com> Signed-off-by: Chris Mason <clm@fb.com> cc: stable@vger.kernel.org
2013-01-10 03:57:25 -05:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: allow omitting stream header and end-cmd for btrfs send Two new flags are added to allow omitting the stream header and the end command for btrfs send streams. This is used in cases where you send multiple snapshots back-to-back in one stream. This used to be encoded like this (with 2 snapshots in this example): <stream header> + <sequence of commands> + <end cmd> + <stream header> + <sequence of commands> + <end cmd> + EOF The new format (if the two new flags are used) is this one: <stream header> + <sequence of commands> + <sequence of commands> + <end cmd> Note that the currently existing receivers treat <end cmd> only as an indication that a new <stream header> is following. This means, you can just skip the sequence <end cmd> <stream header> without loosing compatibility. As long as an EOF is following, the currently existing receivers handle the new format (if the two new flags are used) exactly as the old one. So what is the benefit of this change? The goal is to be able to use a single stream (one TCP connection) to multiplex a request/response handshake plus Btrfs send streams, all in the same stream. In this case you cannot evaluate an EOF condition as an end of the Btrfs send stream. You need something else, and the <end cmd> is just perfect for this purpose. The summary is: The format change is driven by the need to send several Btrfs send streams over a single TCP connections, with the ability for a repeated request/response handshake in the middle. And this format change does not break any existing tool, it is completely compatible. You could compare the old behaviour of the Btrfs send stream to the one of ftp where you need a seperate request/response channel and newly opened data transfer channels for each file, while the new behaviour is more like http using a single stream for everything. Signed-off-by: Stefan Behrens <sbehrens@giantdisaster.de> Signed-off-by: Josef Bacik <jbacik@fusionio.com>
2013-04-10 17:10:52 +00:00
btrfs: add "no file data" flag to btrfs send ioctl This patch adds the flag, BTRFS_SEND_FLAG_NO_FILE_DATA to the btrfs send ioctl code. When this flag is set, the btrfs send code will never write file data into the stream (thus also avoiding expensive reads of that data in the first place). BTRFS_SEND_C_UPDATE_EXTENT commands will be sent (instead of BTRFS_SEND_C_WRITE) with an offset, length pair indicating the extent in question. This patch does not affect the operation of BTRFS_SEND_C_CLONE commands - they will continue to be sent when a search finds an appropriate extent to clone from. Signed-off-by: Mark Fasheh <mfasheh@suse.de> Signed-off-by: Josef Bacik <jbacik@fusionio.com>
2013-02-04 20:54:57 +00:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
btrfs: add "no file data" flag to btrfs send ioctl This patch adds the flag, BTRFS_SEND_FLAG_NO_FILE_DATA to the btrfs send ioctl code. When this flag is set, the btrfs send code will never write file data into the stream (thus also avoiding expensive reads of that data in the first place). BTRFS_SEND_C_UPDATE_EXTENT commands will be sent (instead of BTRFS_SEND_C_WRITE) with an offset, length pair indicating the extent in question. This patch does not affect the operation of BTRFS_SEND_C_CLONE commands - they will continue to be sent when a search finds an appropriate extent to clone from. Signed-off-by: Mark Fasheh <mfasheh@suse.de> Signed-off-by: Josef Bacik <jbacik@fusionio.com>
2013-02-04 20:54:57 +00:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: fix error handling in btrfs_ioctl_send() fget() returns NULL if error. So, we should check NULL or not. Signed-off-by: Tsutomu Itoh <t-itoh@jp.fujitsu.com> Signed-off-by: Josef Bacik <jbacik@fusionio.com>
2013-04-19 01:04:46 +00:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
btrfs: protect snapshots from deleting during send The patch "Btrfs: fix protection between send and root deletion" (18f687d538449373c37c) does not actually prevent to delete the snapshot and just takes care during background cleaning, but this seems rather user unfriendly, this patch implements the idea presented in http://www.spinics.net/lists/linux-btrfs/msg30813.html - add an internal root_item flag to denote a dead root - check if the send_in_progress is set and refuse to delete, otherwise set the flag and proceed - check the flag in send similar to the btrfs_root_readonly checks, for all involved roots The root lookup in send via btrfs_read_fs_root_no_name will check if the root is really dead or not. If it is, ENOENT, aborted send. If it's alive, it's protected by send_in_progress, send can continue. CC: Miao Xie <miaox@cn.fujitsu.com> CC: Wang Shilong <wangsl.fnst@cn.fujitsu.com> Signed-off-by: David Sterba <dsterba@suse.cz> Signed-off-by: Chris Mason <clm@fb.com>
2014-04-15 16:41:44 +02:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: fix infinite path build loops in incremental send The send operation processes inodes by their ascending number, and assumes that any rename/move operation can be successfully performed (sent to the caller) once all previous inodes (those with a smaller inode number than the one we're currently processing) were processed. This is not true when an incremental send had to process an hierarchical change between 2 snapshots where the parent-children relationship between directory inodes was reversed - that is, parents became children and children became parents. This situation made the path building code go into an infinite loop, which kept allocating more and more memory that eventually lead to a krealloc warning being displayed in dmesg: WARNING: CPU: 1 PID: 5705 at mm/page_alloc.c:2477 __alloc_pages_nodemask+0x365/0xad0() Modules linked in: btrfs raid6_pq xor pci_stub vboxpci(O) vboxnetadp(O) vboxnetflt(O) vboxdrv(O) snd_hda_codec_hdmi snd_hda_codec_realtek joydev radeon snd_hda_intel snd_hda_codec snd_hwdep snd_seq_midi snd_pcm psmouse i915 snd_rawmidi serio_raw snd_seq_midi_event lpc_ich snd_seq snd_timer ttm snd_seq_device rfcomm drm_kms_helper parport_pc bnep bluetooth drm ppdev snd soundcore i2c_algo_bit snd_page_alloc binfmt_misc video lp parport r8169 mii hid_generic usbhid hid CPU: 1 PID: 5705 Comm: btrfs Tainted: G O 3.13.0-rc7-fdm-btrfs-next-18+ #3 Hardware name: To Be Filled By O.E.M. To Be Filled By O.E.M./Z77 Pro4, BIOS P1.50 09/04/2012 [ 5381.660441] 00000000000009ad ffff8806f6f2f4e8 ffffffff81777434 0000000000000007 [ 5381.660447] 0000000000000000 ffff8806f6f2f528 ffffffff8104a9ec ffff8807038f36f0 [ 5381.660452] 0000000000000000 0000000000000206 ffff8807038f2490 ffff8807038f36f0 [ 5381.660457] Call Trace: [ 5381.660464] [<ffffffff81777434>] dump_stack+0x4e/0x68 [ 5381.660471] [<ffffffff8104a9ec>] warn_slowpath_common+0x8c/0xc0 [ 5381.660476] [<ffffffff8104aa3a>] warn_slowpath_null+0x1a/0x20 [ 5381.660480] [<ffffffff81144995>] __alloc_pages_nodemask+0x365/0xad0 [ 5381.660487] [<ffffffff8108313f>] ? local_clock+0x4f/0x60 [ 5381.660491] [<ffffffff811430e8>] ? free_one_page+0x98/0x440 [ 5381.660495] [<ffffffff8108313f>] ? local_clock+0x4f/0x60 [ 5381.660502] [<ffffffff8113fae4>] ? __get_free_pages+0x14/0x50 [ 5381.660508] [<ffffffff81095fb8>] ? trace_hardirqs_off_caller+0x28/0xd0 [ 5381.660515] [<ffffffff81183caf>] alloc_pages_current+0x10f/0x1f0 [ 5381.660520] [<ffffffff8113fae4>] ? __get_free_pages+0x14/0x50 [ 5381.660524] [<ffffffff8113fae4>] __get_free_pages+0x14/0x50 [ 5381.660530] [<ffffffff8115dace>] kmalloc_order_trace+0x3e/0x100 [ 5381.660536] [<ffffffff81191ea0>] __kmalloc_track_caller+0x220/0x230 [ 5381.660560] [<ffffffffa0729fdb>] ? fs_path_ensure_buf.part.12+0x6b/0x200 [btrfs] [ 5381.660564] [<ffffffff8178085c>] ? retint_restore_args+0xe/0xe [ 5381.660569] [<ffffffff811580ef>] krealloc+0x6f/0xb0 [ 5381.660586] [<ffffffffa0729fdb>] fs_path_ensure_buf.part.12+0x6b/0x200 [btrfs] [ 5381.660601] [<ffffffffa072a208>] fs_path_prepare_for_add+0x98/0xb0 [btrfs] [ 5381.660615] [<ffffffffa072a2bc>] fs_path_add_path+0x2c/0x60 [btrfs] [ 5381.660628] [<ffffffffa072c55c>] get_cur_path+0x7c/0x1c0 [btrfs] Even without this loop, the incremental send couldn't succeed, because it would attempt to send a rename/move operation for the lower inode before the highest inode number was renamed/move. This issue is easy to trigger with the following steps: $ mkfs.btrfs -f /dev/sdb3 $ mount /dev/sdb3 /mnt/btrfs $ mkdir -p /mnt/btrfs/a/b/c/d $ mkdir /mnt/btrfs/a/b/c2 $ btrfs subvol snapshot -r /mnt/btrfs /mnt/btrfs/snap1 $ mv /mnt/btrfs/a/b/c/d /mnt/btrfs/a/b/c2/d2 $ mv /mnt/btrfs/a/b/c /mnt/btrfs/a/b/c2/d2/cc $ btrfs subvol snapshot -r /mnt/btrfs /mnt/btrfs/snap2 $ btrfs send -p /mnt/btrfs/snap1 /mnt/btrfs/snap2 > /tmp/incremental.send The structure of the filesystem when the first snapshot is taken is: . (ino 256) |-- a (ino 257) |-- b (ino 258) |-- c (ino 259) | |-- d (ino 260) | |-- c2 (ino 261) And its structure when the second snapshot is taken is: . (ino 256) |-- a (ino 257) |-- b (ino 258) |-- c2 (ino 261) |-- d2 (ino 260) |-- cc (ino 259) Before the move/rename operation is performed for the inode 259, the move/rename for inode 260 must be performed, since 259 is now a child of 260. A test case for xfstests, with a more complex scenario, will follow soon. Signed-off-by: Filipe David Borba Manana <fdmanana@gmail.com> Signed-off-by: Josef Bacik <jbacik@fb.com> Signed-off-by: Chris Mason <clm@fb.com>
2014-01-22 10:00:53 +00:00
Btrfs: fix send attempting to rmdir non-empty directories The incremental send algorithm assumed that it was possible to issue a directory remove (rmdir) if the the inode number it was currently processing was greater than (or equal) to any inode that referenced the directory's inode. This wasn't a valid assumption because any such inode might be a child directory that is pending a move/rename operation, because it was moved into a directory that has a higher inode number and was moved/renamed too - in other words, the case the following commit addressed: 9f03740a956d7ac6a1b8f8c455da6fa5cae11c22 (Btrfs: fix infinite path build loops in incremental send) This made an incremental send issue an rmdir operation before the target directory was actually empty, which made btrfs receive fail. Therefore it needs to wait for all pending child directory inodes to be moved/renamed before sending an rmdir operation. Simple steps to reproduce this issue: $ mkfs.btrfs -f /dev/sdb3 $ mount /dev/sdb3 /mnt/btrfs $ mkdir -p /mnt/btrfs/a/b/c/x $ mkdir /mnt/btrfs/a/b/y $ btrfs subvolume snapshot -r /mnt/btrfs /mnt/btrfs/snap1 $ btrfs send /mnt/btrfs/snap1 -f /tmp/base.send $ mv /mnt/btrfs/a/b/y /mnt/btrfs/a/b/YY $ mv /mnt/btrfs/a/b/c/x /mnt/btrfs/a/b/YY $ rmdir /mnt/btrfs/a/b/c $ btrfs subvolume snapshot -r /mnt/btrfs /mnt/btrfs/snap2 $ btrfs send -p /mnt/btrfs/snap1 /mnt/btrfs/snap2 -f /tmp/incremental.send $ umount /mnt/btrfs $ mkfs.btrfs -f /dev/sdb3 $ mount /dev/sdb3 /mnt/btrfs $ btrfs receive /mnt/btrfs -f /tmp/base.send $ btrfs receive /mnt/btrfs -f /tmp/incremental.send The second btrfs receive command failed with: ERROR: rmdir o259-6-0 failed. Directory not empty A test case for xfstests follows. Signed-off-by: Filipe David Borba Manana <fdmanana@gmail.com> Signed-off-by: Josef Bacik <jbacik@fb.com>
2014-02-19 14:31:44 +00:00
Btrfs: fix infinite path build loops in incremental send The send operation processes inodes by their ascending number, and assumes that any rename/move operation can be successfully performed (sent to the caller) once all previous inodes (those with a smaller inode number than the one we're currently processing) were processed. This is not true when an incremental send had to process an hierarchical change between 2 snapshots where the parent-children relationship between directory inodes was reversed - that is, parents became children and children became parents. This situation made the path building code go into an infinite loop, which kept allocating more and more memory that eventually lead to a krealloc warning being displayed in dmesg: WARNING: CPU: 1 PID: 5705 at mm/page_alloc.c:2477 __alloc_pages_nodemask+0x365/0xad0() Modules linked in: btrfs raid6_pq xor pci_stub vboxpci(O) vboxnetadp(O) vboxnetflt(O) vboxdrv(O) snd_hda_codec_hdmi snd_hda_codec_realtek joydev radeon snd_hda_intel snd_hda_codec snd_hwdep snd_seq_midi snd_pcm psmouse i915 snd_rawmidi serio_raw snd_seq_midi_event lpc_ich snd_seq snd_timer ttm snd_seq_device rfcomm drm_kms_helper parport_pc bnep bluetooth drm ppdev snd soundcore i2c_algo_bit snd_page_alloc binfmt_misc video lp parport r8169 mii hid_generic usbhid hid CPU: 1 PID: 5705 Comm: btrfs Tainted: G O 3.13.0-rc7-fdm-btrfs-next-18+ #3 Hardware name: To Be Filled By O.E.M. To Be Filled By O.E.M./Z77 Pro4, BIOS P1.50 09/04/2012 [ 5381.660441] 00000000000009ad ffff8806f6f2f4e8 ffffffff81777434 0000000000000007 [ 5381.660447] 0000000000000000 ffff8806f6f2f528 ffffffff8104a9ec ffff8807038f36f0 [ 5381.660452] 0000000000000000 0000000000000206 ffff8807038f2490 ffff8807038f36f0 [ 5381.660457] Call Trace: [ 5381.660464] [<ffffffff81777434>] dump_stack+0x4e/0x68 [ 5381.660471] [<ffffffff8104a9ec>] warn_slowpath_common+0x8c/0xc0 [ 5381.660476] [<ffffffff8104aa3a>] warn_slowpath_null+0x1a/0x20 [ 5381.660480] [<ffffffff81144995>] __alloc_pages_nodemask+0x365/0xad0 [ 5381.660487] [<ffffffff8108313f>] ? local_clock+0x4f/0x60 [ 5381.660491] [<ffffffff811430e8>] ? free_one_page+0x98/0x440 [ 5381.660495] [<ffffffff8108313f>] ? local_clock+0x4f/0x60 [ 5381.660502] [<ffffffff8113fae4>] ? __get_free_pages+0x14/0x50 [ 5381.660508] [<ffffffff81095fb8>] ? trace_hardirqs_off_caller+0x28/0xd0 [ 5381.660515] [<ffffffff81183caf>] alloc_pages_current+0x10f/0x1f0 [ 5381.660520] [<ffffffff8113fae4>] ? __get_free_pages+0x14/0x50 [ 5381.660524] [<ffffffff8113fae4>] __get_free_pages+0x14/0x50 [ 5381.660530] [<ffffffff8115dace>] kmalloc_order_trace+0x3e/0x100 [ 5381.660536] [<ffffffff81191ea0>] __kmalloc_track_caller+0x220/0x230 [ 5381.660560] [<ffffffffa0729fdb>] ? fs_path_ensure_buf.part.12+0x6b/0x200 [btrfs] [ 5381.660564] [<ffffffff8178085c>] ? retint_restore_args+0xe/0xe [ 5381.660569] [<ffffffff811580ef>] krealloc+0x6f/0xb0 [ 5381.660586] [<ffffffffa0729fdb>] fs_path_ensure_buf.part.12+0x6b/0x200 [btrfs] [ 5381.660601] [<ffffffffa072a208>] fs_path_prepare_for_add+0x98/0xb0 [btrfs] [ 5381.660615] [<ffffffffa072a2bc>] fs_path_add_path+0x2c/0x60 [btrfs] [ 5381.660628] [<ffffffffa072c55c>] get_cur_path+0x7c/0x1c0 [btrfs] Even without this loop, the incremental send couldn't succeed, because it would attempt to send a rename/move operation for the lower inode before the highest inode number was renamed/move. This issue is easy to trigger with the following steps: $ mkfs.btrfs -f /dev/sdb3 $ mount /dev/sdb3 /mnt/btrfs $ mkdir -p /mnt/btrfs/a/b/c/d $ mkdir /mnt/btrfs/a/b/c2 $ btrfs subvol snapshot -r /mnt/btrfs /mnt/btrfs/snap1 $ mv /mnt/btrfs/a/b/c/d /mnt/btrfs/a/b/c2/d2 $ mv /mnt/btrfs/a/b/c /mnt/btrfs/a/b/c2/d2/cc $ btrfs subvol snapshot -r /mnt/btrfs /mnt/btrfs/snap2 $ btrfs send -p /mnt/btrfs/snap1 /mnt/btrfs/snap2 > /tmp/incremental.send The structure of the filesystem when the first snapshot is taken is: . (ino 256) |-- a (ino 257) |-- b (ino 258) |-- c (ino 259) | |-- d (ino 260) | |-- c2 (ino 261) And its structure when the second snapshot is taken is: . (ino 256) |-- a (ino 257) |-- b (ino 258) |-- c2 (ino 261) |-- d2 (ino 260) |-- cc (ino 259) Before the move/rename operation is performed for the inode 259, the move/rename for inode 260 must be performed, since 259 is now a child of 260. A test case for xfstests, with a more complex scenario, will follow soon. Signed-off-by: Filipe David Borba Manana <fdmanana@gmail.com> Signed-off-by: Josef Bacik <jbacik@fb.com> Signed-off-by: Chris Mason <clm@fb.com>
2014-01-22 10:00:53 +00:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: fix protection between send and root deletion We should gurantee that parent and clone roots can not be destroyed during send, for this we have two ideas. 1.by holding @subvol_sem, this might be a nightmare, because it will block all subvolumes deletion for a long time. 2.Miao pointed out we can reuse @send_in_progress, that mean we will skip snapshot deletion if root sending is in progress. Here we adopt the second approach since it won't block other subvolumes deletion for a long time. Besides in btrfs_clean_one_deleted_snapshot(), we only check first root , if this root is involved in send, we return directly rather than continue to check.There are several reasons about it: 1.this case happen seldomly. 2.after sending,cleaner thread can continue to drop that root. 3.make code simple Cc: David Sterba <dsterba@suse.cz> Signed-off-by: Wang Shilong <wangsl.fnst@cn.fujitsu.com> Reviewed-by: Miao Xie <miaox@cn.fujitsu.com> Signed-off-by: Josef Bacik <jbacik@fb.com> Signed-off-by: Chris Mason <clm@fb.com>
2014-01-07 17:25:19 +08:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: fix protection between send and root deletion We should gurantee that parent and clone roots can not be destroyed during send, for this we have two ideas. 1.by holding @subvol_sem, this might be a nightmare, because it will block all subvolumes deletion for a long time. 2.Miao pointed out we can reuse @send_in_progress, that mean we will skip snapshot deletion if root sending is in progress. Here we adopt the second approach since it won't block other subvolumes deletion for a long time. Besides in btrfs_clean_one_deleted_snapshot(), we only check first root , if this root is involved in send, we return directly rather than continue to check.There are several reasons about it: 1.this case happen seldomly. 2.after sending,cleaner thread can continue to drop that root. 3.make code simple Cc: David Sterba <dsterba@suse.cz> Signed-off-by: Wang Shilong <wangsl.fnst@cn.fujitsu.com> Reviewed-by: Miao Xie <miaox@cn.fujitsu.com> Signed-off-by: Josef Bacik <jbacik@fb.com> Signed-off-by: Chris Mason <clm@fb.com>
2014-01-07 17:25:19 +08:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
btrfs: Check read-only status of roots during send All the subvolues that are involved in send must be read-only during the whole operation. The ioctl SUBVOL_SETFLAGS could be used to change the status to read-write and the result of send stream is undefined if the data change unexpectedly. Fix that by adding a refcount for all involved roots and verify that there's no send in progress during SUBVOL_SETFLAGS ioctl call that does read-only -> read-write transition. We need refcounts because there are no restrictions on number of send parallel operations currently run on a single subvolume, be it source, parent or one of the multiple clone sources. Kernel is silent when the RO checks fail and returns EPERM. The same set of checks is done already in userspace before send starts. Signed-off-by: David Sterba <dsterba@suse.cz> Signed-off-by: Josef Bacik <jbacik@fb.com> Signed-off-by: Chris Mason <clm@fb.com>
2013-12-16 17:34:17 +01:00
Btrfs: send, add missing check for dead clone root After we locked the root's root item, a concurrent snapshot deletion call might have set the dead flag on it. So check if the dead flag is set and abort if it is, just like we do for the parent root. Signed-off-by: Filipe Manana <fdmanana@suse.com> Reviewed-by: David Sterba <dsterba@suse.cz> Signed-off-by: Chris Mason <clm@fb.com>
2015-03-02 20:53:52 +00:00
btrfs: Check read-only status of roots during send All the subvolues that are involved in send must be read-only during the whole operation. The ioctl SUBVOL_SETFLAGS could be used to change the status to read-write and the result of send stream is undefined if the data change unexpectedly. Fix that by adding a refcount for all involved roots and verify that there's no send in progress during SUBVOL_SETFLAGS ioctl call that does read-only -> read-write transition. We need refcounts because there are no restrictions on number of send parallel operations currently run on a single subvolume, be it source, parent or one of the multiple clone sources. Kernel is silent when the RO checks fail and returns EPERM. The same set of checks is done already in userspace before send starts. Signed-off-by: David Sterba <dsterba@suse.cz> Signed-off-by: Josef Bacik <jbacik@fb.com> Signed-off-by: Chris Mason <clm@fb.com>
2013-12-16 17:34:17 +01:00
Btrfs: fix protection between send and root deletion We should gurantee that parent and clone roots can not be destroyed during send, for this we have two ideas. 1.by holding @subvol_sem, this might be a nightmare, because it will block all subvolumes deletion for a long time. 2.Miao pointed out we can reuse @send_in_progress, that mean we will skip snapshot deletion if root sending is in progress. Here we adopt the second approach since it won't block other subvolumes deletion for a long time. Besides in btrfs_clean_one_deleted_snapshot(), we only check first root , if this root is involved in send, we return directly rather than continue to check.There are several reasons about it: 1.this case happen seldomly. 2.after sending,cleaner thread can continue to drop that root. 3.make code simple Cc: David Sterba <dsterba@suse.cz> Signed-off-by: Wang Shilong <wangsl.fnst@cn.fujitsu.com> Reviewed-by: Miao Xie <miaox@cn.fujitsu.com> Signed-off-by: Josef Bacik <jbacik@fb.com> Signed-off-by: Chris Mason <clm@fb.com>
2014-01-07 17:25:19 +08:00
btrfs: Check read-only status of roots during send All the subvolues that are involved in send must be read-only during the whole operation. The ioctl SUBVOL_SETFLAGS could be used to change the status to read-write and the result of send stream is undefined if the data change unexpectedly. Fix that by adding a refcount for all involved roots and verify that there's no send in progress during SUBVOL_SETFLAGS ioctl call that does read-only -> read-write transition. We need refcounts because there are no restrictions on number of send parallel operations currently run on a single subvolume, be it source, parent or one of the multiple clone sources. Kernel is silent when the RO checks fail and returns EPERM. The same set of checks is done already in userspace before send starts. Signed-off-by: David Sterba <dsterba@suse.cz> Signed-off-by: Josef Bacik <jbacik@fb.com> Signed-off-by: Chris Mason <clm@fb.com>
2013-12-16 17:34:17 +01:00
Btrfs: send, don't leave without decrementing clone root's send_progress If the clone root was not readonly or the dead flag was set on it, we were leaving without decrementing the root's send_progress counter (and before we just incremented it). If a concurrent snapshot deletion was in progress and ended up being aborted, it would be impossible to later attempt to delete again the snapshot, since the root's send_in_progress counter could never go back to 0. We were also setting clone_sources_to_rollback to i + 1 too early - if we bailed out because the clone root we got is not readonly or flagged as dead we ended up later derreferencing a null pointer because we didn't assign the clone root to sctx->clone_roots[i].root: for (i = 0; sctx && i < clone_sources_to_rollback; i++) btrfs_root_dec_send_in_progress( sctx->clone_roots[i].root); So just don't increment the send_in_progress counter if the root is readonly or flagged as dead. Signed-off-by: Filipe Manana <fdmanana@suse.com> Reviewed-by: David Sterba <dsterba@suse.cz> Signed-off-by: Chris Mason <clm@fb.com>
2015-03-02 20:53:53 +00:00
btrfs: Check read-only status of roots during send All the subvolues that are involved in send must be read-only during the whole operation. The ioctl SUBVOL_SETFLAGS could be used to change the status to read-write and the result of send stream is undefined if the data change unexpectedly. Fix that by adding a refcount for all involved roots and verify that there's no send in progress during SUBVOL_SETFLAGS ioctl call that does read-only -> read-write transition. We need refcounts because there are no restrictions on number of send parallel operations currently run on a single subvolume, be it source, parent or one of the multiple clone sources. Kernel is silent when the RO checks fail and returns EPERM. The same set of checks is done already in userspace before send starts. Signed-off-by: David Sterba <dsterba@suse.cz> Signed-off-by: Josef Bacik <jbacik@fb.com> Signed-off-by: Chris Mason <clm@fb.com>
2013-12-16 17:34:17 +01:00
Btrfs: fix protection between send and root deletion We should gurantee that parent and clone roots can not be destroyed during send, for this we have two ideas. 1.by holding @subvol_sem, this might be a nightmare, because it will block all subvolumes deletion for a long time. 2.Miao pointed out we can reuse @send_in_progress, that mean we will skip snapshot deletion if root sending is in progress. Here we adopt the second approach since it won't block other subvolumes deletion for a long time. Besides in btrfs_clean_one_deleted_snapshot(), we only check first root , if this root is involved in send, we return directly rather than continue to check.There are several reasons about it: 1.this case happen seldomly. 2.after sending,cleaner thread can continue to drop that root. 3.make code simple Cc: David Sterba <dsterba@suse.cz> Signed-off-by: Wang Shilong <wangsl.fnst@cn.fujitsu.com> Reviewed-by: Miao Xie <miaox@cn.fujitsu.com> Signed-off-by: Josef Bacik <jbacik@fb.com> Signed-off-by: Chris Mason <clm@fb.com>
2014-01-07 17:25:19 +08:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: send, don't leave without decrementing clone root's send_progress If the clone root was not readonly or the dead flag was set on it, we were leaving without decrementing the root's send_progress counter (and before we just incremented it). If a concurrent snapshot deletion was in progress and ended up being aborted, it would be impossible to later attempt to delete again the snapshot, since the root's send_in_progress counter could never go back to 0. We were also setting clone_sources_to_rollback to i + 1 too early - if we bailed out because the clone root we got is not readonly or flagged as dead we ended up later derreferencing a null pointer because we didn't assign the clone root to sctx->clone_roots[i].root: for (i = 0; sctx && i < clone_sources_to_rollback; i++) btrfs_root_dec_send_in_progress( sctx->clone_roots[i].root); So just don't increment the send_in_progress counter if the root is readonly or flagged as dead. Signed-off-by: Filipe Manana <fdmanana@suse.com> Reviewed-by: David Sterba <dsterba@suse.cz> Signed-off-by: Chris Mason <clm@fb.com>
2015-03-02 20:53:53 +00:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: fix protection between send and root deletion We should gurantee that parent and clone roots can not be destroyed during send, for this we have two ideas. 1.by holding @subvol_sem, this might be a nightmare, because it will block all subvolumes deletion for a long time. 2.Miao pointed out we can reuse @send_in_progress, that mean we will skip snapshot deletion if root sending is in progress. Here we adopt the second approach since it won't block other subvolumes deletion for a long time. Besides in btrfs_clean_one_deleted_snapshot(), we only check first root , if this root is involved in send, we return directly rather than continue to check.There are several reasons about it: 1.this case happen seldomly. 2.after sending,cleaner thread can continue to drop that root. 3.make code simple Cc: David Sterba <dsterba@suse.cz> Signed-off-by: Wang Shilong <wangsl.fnst@cn.fujitsu.com> Reviewed-by: Miao Xie <miaox@cn.fujitsu.com> Signed-off-by: Josef Bacik <jbacik@fb.com> Signed-off-by: Chris Mason <clm@fb.com>
2014-01-07 17:25:19 +08:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: cleanup, btrfs_read_fs_root_no_name() doesn't return NULL No need to check for NULL in send.c and disk-io.c. Signed-off-by: Stefan Behrens <sbehrens@giantdisaster.de> Signed-off-by: Josef Bacik <jbacik@fusionio.com>
2013-05-13 14:42:57 +00:00
Btrfs: fix protection between send and root deletion We should gurantee that parent and clone roots can not be destroyed during send, for this we have two ideas. 1.by holding @subvol_sem, this might be a nightmare, because it will block all subvolumes deletion for a long time. 2.Miao pointed out we can reuse @send_in_progress, that mean we will skip snapshot deletion if root sending is in progress. Here we adopt the second approach since it won't block other subvolumes deletion for a long time. Besides in btrfs_clean_one_deleted_snapshot(), we only check first root , if this root is involved in send, we return directly rather than continue to check.There are several reasons about it: 1.this case happen seldomly. 2.after sending,cleaner thread can continue to drop that root. 3.make code simple Cc: David Sterba <dsterba@suse.cz> Signed-off-by: Wang Shilong <wangsl.fnst@cn.fujitsu.com> Reviewed-by: Miao Xie <miaox@cn.fujitsu.com> Signed-off-by: Josef Bacik <jbacik@fb.com> Signed-off-by: Chris Mason <clm@fb.com>
2014-01-07 17:25:19 +08:00
Btrfs: cleanup, btrfs_read_fs_root_no_name() doesn't return NULL No need to check for NULL in send.c and disk-io.c. Signed-off-by: Stefan Behrens <sbehrens@giantdisaster.de> Signed-off-by: Josef Bacik <jbacik@fusionio.com>
2013-05-13 14:42:57 +00:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: fix protection between send and root deletion We should gurantee that parent and clone roots can not be destroyed during send, for this we have two ideas. 1.by holding @subvol_sem, this might be a nightmare, because it will block all subvolumes deletion for a long time. 2.Miao pointed out we can reuse @send_in_progress, that mean we will skip snapshot deletion if root sending is in progress. Here we adopt the second approach since it won't block other subvolumes deletion for a long time. Besides in btrfs_clean_one_deleted_snapshot(), we only check first root , if this root is involved in send, we return directly rather than continue to check.There are several reasons about it: 1.this case happen seldomly. 2.after sending,cleaner thread can continue to drop that root. 3.make code simple Cc: David Sterba <dsterba@suse.cz> Signed-off-by: Wang Shilong <wangsl.fnst@cn.fujitsu.com> Reviewed-by: Miao Xie <miaox@cn.fujitsu.com> Signed-off-by: Josef Bacik <jbacik@fb.com> Signed-off-by: Chris Mason <clm@fb.com>
2014-01-07 17:25:19 +08:00
btrfs: Check read-only status of roots during send All the subvolues that are involved in send must be read-only during the whole operation. The ioctl SUBVOL_SETFLAGS could be used to change the status to read-write and the result of send stream is undefined if the data change unexpectedly. Fix that by adding a refcount for all involved roots and verify that there's no send in progress during SUBVOL_SETFLAGS ioctl call that does read-only -> read-write transition. We need refcounts because there are no restrictions on number of send parallel operations currently run on a single subvolume, be it source, parent or one of the multiple clone sources. Kernel is silent when the RO checks fail and returns EPERM. The same set of checks is done already in userspace before send starts. Signed-off-by: David Sterba <dsterba@suse.cz> Signed-off-by: Josef Bacik <jbacik@fb.com> Signed-off-by: Chris Mason <clm@fb.com>
2013-12-16 17:34:17 +01:00
btrfs: protect snapshots from deleting during send The patch "Btrfs: fix protection between send and root deletion" (18f687d538449373c37c) does not actually prevent to delete the snapshot and just takes care during background cleaning, but this seems rather user unfriendly, this patch implements the idea presented in http://www.spinics.net/lists/linux-btrfs/msg30813.html - add an internal root_item flag to denote a dead root - check if the send_in_progress is set and refuse to delete, otherwise set the flag and proceed - check the flag in send similar to the btrfs_root_readonly checks, for all involved roots The root lookup in send via btrfs_read_fs_root_no_name will check if the root is really dead or not. If it is, ENOENT, aborted send. If it's alive, it's protected by send_in_progress, send can continue. CC: Miao Xie <miaox@cn.fujitsu.com> CC: Wang Shilong <wangsl.fnst@cn.fujitsu.com> Signed-off-by: David Sterba <dsterba@suse.cz> Signed-off-by: Chris Mason <clm@fb.com>
2014-04-15 16:41:44 +02:00
btrfs: Check read-only status of roots during send All the subvolues that are involved in send must be read-only during the whole operation. The ioctl SUBVOL_SETFLAGS could be used to change the status to read-write and the result of send stream is undefined if the data change unexpectedly. Fix that by adding a refcount for all involved roots and verify that there's no send in progress during SUBVOL_SETFLAGS ioctl call that does read-only -> read-write transition. We need refcounts because there are no restrictions on number of send parallel operations currently run on a single subvolume, be it source, parent or one of the multiple clone sources. Kernel is silent when the RO checks fail and returns EPERM. The same set of checks is done already in userspace before send starts. Signed-off-by: David Sterba <dsterba@suse.cz> Signed-off-by: Josef Bacik <jbacik@fb.com> Signed-off-by: Chris Mason <clm@fb.com>
2013-12-16 17:34:17 +01:00
Btrfs: fix protection between send and root deletion We should gurantee that parent and clone roots can not be destroyed during send, for this we have two ideas. 1.by holding @subvol_sem, this might be a nightmare, because it will block all subvolumes deletion for a long time. 2.Miao pointed out we can reuse @send_in_progress, that mean we will skip snapshot deletion if root sending is in progress. Here we adopt the second approach since it won't block other subvolumes deletion for a long time. Besides in btrfs_clean_one_deleted_snapshot(), we only check first root , if this root is involved in send, we return directly rather than continue to check.There are several reasons about it: 1.this case happen seldomly. 2.after sending,cleaner thread can continue to drop that root. 3.make code simple Cc: David Sterba <dsterba@suse.cz> Signed-off-by: Wang Shilong <wangsl.fnst@cn.fujitsu.com> Reviewed-by: Miao Xie <miaox@cn.fujitsu.com> Signed-off-by: Josef Bacik <jbacik@fb.com> Signed-off-by: Chris Mason <clm@fb.com>
2014-01-07 17:25:19 +08:00
btrfs: Check read-only status of roots during send All the subvolues that are involved in send must be read-only during the whole operation. The ioctl SUBVOL_SETFLAGS could be used to change the status to read-write and the result of send stream is undefined if the data change unexpectedly. Fix that by adding a refcount for all involved roots and verify that there's no send in progress during SUBVOL_SETFLAGS ioctl call that does read-only -> read-write transition. We need refcounts because there are no restrictions on number of send parallel operations currently run on a single subvolume, be it source, parent or one of the multiple clone sources. Kernel is silent when the RO checks fail and returns EPERM. The same set of checks is done already in userspace before send starts. Signed-off-by: David Sterba <dsterba@suse.cz> Signed-off-by: Josef Bacik <jbacik@fb.com> Signed-off-by: Chris Mason <clm@fb.com>
2013-12-16 17:34:17 +01:00
Btrfs: fix protection between send and root deletion We should gurantee that parent and clone roots can not be destroyed during send, for this we have two ideas. 1.by holding @subvol_sem, this might be a nightmare, because it will block all subvolumes deletion for a long time. 2.Miao pointed out we can reuse @send_in_progress, that mean we will skip snapshot deletion if root sending is in progress. Here we adopt the second approach since it won't block other subvolumes deletion for a long time. Besides in btrfs_clean_one_deleted_snapshot(), we only check first root , if this root is involved in send, we return directly rather than continue to check.There are several reasons about it: 1.this case happen seldomly. 2.after sending,cleaner thread can continue to drop that root. 3.make code simple Cc: David Sterba <dsterba@suse.cz> Signed-off-by: Wang Shilong <wangsl.fnst@cn.fujitsu.com> Reviewed-by: Miao Xie <miaox@cn.fujitsu.com> Signed-off-by: Josef Bacik <jbacik@fb.com> Signed-off-by: Chris Mason <clm@fb.com>
2014-01-07 17:25:19 +08:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: fix wrong send_in_progress accounting Steps to reproduce: # mkfs.btrfs -f /dev/sda8 # mount /dev/sda8 /mnt # btrfs sub snapshot -r /mnt /mnt/snap1 # btrfs sub snapshot -r /mnt /mnt/snap2 # btrfs send /mnt/snap1 -p /mnt/snap2 -f /mnt/1 # dmesg The problem is that we will sort clone roots(include @send_root), it might push @send_root before thus @send_root's @send_in_progress will be decreased twice. Cc: David Sterba <dsterba@suse.cz> Signed-off-by: Wang Shilong <wangsl.fnst@cn.fujitsu.com> Signed-off-by: Josef Bacik <jbacik@fb.com> Signed-off-by: Chris Mason <clm@fb.com>
2014-01-07 17:25:18 +08:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: ensure send always works on roots without orphans Move the logic from the snapshot creation ioctl into send. This avoids doing the transaction commit if send isn't used, and ensures that if a crash/reboot happens after the transaction commit that created the snapshot and before the transaction commit that switched the commit root, send will not get a commit root that differs from the main root (that has orphan items). Signed-off-by: Filipe Manana <fdmanana@suse.com> Signed-off-by: Chris Mason <clm@fb.com>
2014-10-21 11:11:41 +01:00
btrfs: hide typecast to definition of BTRFS_SEND_TRANS_STUB Signed-off-by: David Sterba <dsterba@suse.cz>
2014-07-31 00:43:18 +02:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: don't clear uptodate if the eb is under IO So I have an awful exercise script that will run snapshot, balance and send/receive in parallel. This sometimes would crash spectacularly and when it came back up the fs would be completely hosed. Turns out this is because of a bad interaction of balance and send/receive. Send will hold onto its entire path for the whole send, but its blocks could get relocated out from underneath it, and because it doesn't old tree locks theres nothing to keep this from happening. So it will go to read in a slot with an old transid, and we could have re-allocated this block for something else and it could have a completely different transid. But because we think it is invalid we clear uptodate and re-read in the block. If we do this before we actually write out the new block we could write back stale data to the fs, and boom we're screwed. Now we definitely need to fix this disconnect between send and balance, but we really really need to not allow ourselves to accidently read in stale data over new data. So make sure we check if the extent buffer is not under io before clearing uptodate, this will kick back EIO to the caller instead of reading in stale data and keep us from corrupting the fs. Thanks, Signed-off-by: Josef Bacik <jbacik@fb.com> Signed-off-by: Chris Mason <clm@fb.com>
2014-03-28 17:07:27 -04:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: allow omitting stream header and end-cmd for btrfs send Two new flags are added to allow omitting the stream header and the end command for btrfs send streams. This is used in cases where you send multiple snapshots back-to-back in one stream. This used to be encoded like this (with 2 snapshots in this example): <stream header> + <sequence of commands> + <end cmd> + <stream header> + <sequence of commands> + <end cmd> + EOF The new format (if the two new flags are used) is this one: <stream header> + <sequence of commands> + <sequence of commands> + <end cmd> Note that the currently existing receivers treat <end cmd> only as an indication that a new <stream header> is following. This means, you can just skip the sequence <end cmd> <stream header> without loosing compatibility. As long as an EOF is following, the currently existing receivers handle the new format (if the two new flags are used) exactly as the old one. So what is the benefit of this change? The goal is to be able to use a single stream (one TCP connection) to multiplex a request/response handshake plus Btrfs send streams, all in the same stream. In this case you cannot evaluate an EOF condition as an end of the Btrfs send stream. You need something else, and the <end cmd> is just perfect for this purpose. The summary is: The format change is driven by the need to send several Btrfs send streams over a single TCP connections, with the ability for a repeated request/response handshake in the middle. And this format change does not break any existing tool, it is completely compatible. You could compare the old behaviour of the Btrfs send stream to the one of ftp where you need a seperate request/response channel and newly opened data transfer channels for each file, while the new behaviour is more like http using a single stream for everything. Signed-off-by: Stefan Behrens <sbehrens@giantdisaster.de> Signed-off-by: Josef Bacik <jbacik@fusionio.com>
2013-04-10 17:10:52 +00:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00
Btrfs: fix infinite path build loops in incremental send The send operation processes inodes by their ascending number, and assumes that any rename/move operation can be successfully performed (sent to the caller) once all previous inodes (those with a smaller inode number than the one we're currently processing) were processed. This is not true when an incremental send had to process an hierarchical change between 2 snapshots where the parent-children relationship between directory inodes was reversed - that is, parents became children and children became parents. This situation made the path building code go into an infinite loop, which kept allocating more and more memory that eventually lead to a krealloc warning being displayed in dmesg: WARNING: CPU: 1 PID: 5705 at mm/page_alloc.c:2477 __alloc_pages_nodemask+0x365/0xad0() Modules linked in: btrfs raid6_pq xor pci_stub vboxpci(O) vboxnetadp(O) vboxnetflt(O) vboxdrv(O) snd_hda_codec_hdmi snd_hda_codec_realtek joydev radeon snd_hda_intel snd_hda_codec snd_hwdep snd_seq_midi snd_pcm psmouse i915 snd_rawmidi serio_raw snd_seq_midi_event lpc_ich snd_seq snd_timer ttm snd_seq_device rfcomm drm_kms_helper parport_pc bnep bluetooth drm ppdev snd soundcore i2c_algo_bit snd_page_alloc binfmt_misc video lp parport r8169 mii hid_generic usbhid hid CPU: 1 PID: 5705 Comm: btrfs Tainted: G O 3.13.0-rc7-fdm-btrfs-next-18+ #3 Hardware name: To Be Filled By O.E.M. To Be Filled By O.E.M./Z77 Pro4, BIOS P1.50 09/04/2012 [ 5381.660441] 00000000000009ad ffff8806f6f2f4e8 ffffffff81777434 0000000000000007 [ 5381.660447] 0000000000000000 ffff8806f6f2f528 ffffffff8104a9ec ffff8807038f36f0 [ 5381.660452] 0000000000000000 0000000000000206 ffff8807038f2490 ffff8807038f36f0 [ 5381.660457] Call Trace: [ 5381.660464] [<ffffffff81777434>] dump_stack+0x4e/0x68 [ 5381.660471] [<ffffffff8104a9ec>] warn_slowpath_common+0x8c/0xc0 [ 5381.660476] [<ffffffff8104aa3a>] warn_slowpath_null+0x1a/0x20 [ 5381.660480] [<ffffffff81144995>] __alloc_pages_nodemask+0x365/0xad0 [ 5381.660487] [<ffffffff8108313f>] ? local_clock+0x4f/0x60 [ 5381.660491] [<ffffffff811430e8>] ? free_one_page+0x98/0x440 [ 5381.660495] [<ffffffff8108313f>] ? local_clock+0x4f/0x60 [ 5381.660502] [<ffffffff8113fae4>] ? __get_free_pages+0x14/0x50 [ 5381.660508] [<ffffffff81095fb8>] ? trace_hardirqs_off_caller+0x28/0xd0 [ 5381.660515] [<ffffffff81183caf>] alloc_pages_current+0x10f/0x1f0 [ 5381.660520] [<ffffffff8113fae4>] ? __get_free_pages+0x14/0x50 [ 5381.660524] [<ffffffff8113fae4>] __get_free_pages+0x14/0x50 [ 5381.660530] [<ffffffff8115dace>] kmalloc_order_trace+0x3e/0x100 [ 5381.660536] [<ffffffff81191ea0>] __kmalloc_track_caller+0x220/0x230 [ 5381.660560] [<ffffffffa0729fdb>] ? fs_path_ensure_buf.part.12+0x6b/0x200 [btrfs] [ 5381.660564] [<ffffffff8178085c>] ? retint_restore_args+0xe/0xe [ 5381.660569] [<ffffffff811580ef>] krealloc+0x6f/0xb0 [ 5381.660586] [<ffffffffa0729fdb>] fs_path_ensure_buf.part.12+0x6b/0x200 [btrfs] [ 5381.660601] [<ffffffffa072a208>] fs_path_prepare_for_add+0x98/0xb0 [btrfs] [ 5381.660615] [<ffffffffa072a2bc>] fs_path_add_path+0x2c/0x60 [btrfs] [ 5381.660628] [<ffffffffa072c55c>] get_cur_path+0x7c/0x1c0 [btrfs] Even without this loop, the incremental send couldn't succeed, because it would attempt to send a rename/move operation for the lower inode before the highest inode number was renamed/move. This issue is easy to trigger with the following steps: $ mkfs.btrfs -f /dev/sdb3 $ mount /dev/sdb3 /mnt/btrfs $ mkdir -p /mnt/btrfs/a/b/c/d $ mkdir /mnt/btrfs/a/b/c2 $ btrfs subvol snapshot -r /mnt/btrfs /mnt/btrfs/snap1 $ mv /mnt/btrfs/a/b/c/d /mnt/btrfs/a/b/c2/d2 $ mv /mnt/btrfs/a/b/c /mnt/btrfs/a/b/c2/d2/cc $ btrfs subvol snapshot -r /mnt/btrfs /mnt/btrfs/snap2 $ btrfs send -p /mnt/btrfs/snap1 /mnt/btrfs/snap2 > /tmp/incremental.send The structure of the filesystem when the first snapshot is taken is: . (ino 256) |-- a (ino 257) |-- b (ino 258) |-- c (ino 259) | |-- d (ino 260) | |-- c2 (ino 261) And its structure when the second snapshot is taken is: . (ino 256) |-- a (ino 257) |-- b (ino 258) |-- c2 (ino 261) |-- d2 (ino 260) |-- cc (ino 259) Before the move/rename operation is performed for the inode 259, the move/rename for inode 260 must be performed, since 259 is now a child of 260. A test case for xfstests, with a more complex scenario, will follow soon. Signed-off-by: Filipe David Borba Manana <fdmanana@gmail.com> Signed-off-by: Josef Bacik <jbacik@fb.com> Signed-off-by: Chris Mason <clm@fb.com>
2014-01-22 10:00:53 +00:00
Btrfs: fix send attempting to rmdir non-empty directories The incremental send algorithm assumed that it was possible to issue a directory remove (rmdir) if the the inode number it was currently processing was greater than (or equal) to any inode that referenced the directory's inode. This wasn't a valid assumption because any such inode might be a child directory that is pending a move/rename operation, because it was moved into a directory that has a higher inode number and was moved/renamed too - in other words, the case the following commit addressed: 9f03740a956d7ac6a1b8f8c455da6fa5cae11c22 (Btrfs: fix infinite path build loops in incremental send) This made an incremental send issue an rmdir operation before the target directory was actually empty, which made btrfs receive fail. Therefore it needs to wait for all pending child directory inodes to be moved/renamed before sending an rmdir operation. Simple steps to reproduce this issue: $ mkfs.btrfs -f /dev/sdb3 $ mount /dev/sdb3 /mnt/btrfs $ mkdir -p /mnt/btrfs/a/b/c/x $ mkdir /mnt/btrfs/a/b/y $ btrfs subvolume snapshot -r /mnt/btrfs /mnt/btrfs/snap1 $ btrfs send /mnt/btrfs/snap1 -f /tmp/base.send $ mv /mnt/btrfs/a/b/y /mnt/btrfs/a/b/YY $ mv /mnt/btrfs/a/b/c/x /mnt/btrfs/a/b/YY $ rmdir /mnt/btrfs/a/b/c $ btrfs subvolume snapshot -r /mnt/btrfs /mnt/btrfs/snap2 $ btrfs send -p /mnt/btrfs/snap1 /mnt/btrfs/snap2 -f /tmp/incremental.send $ umount /mnt/btrfs $ mkfs.btrfs -f /dev/sdb3 $ mount /dev/sdb3 /mnt/btrfs $ btrfs receive /mnt/btrfs -f /tmp/base.send $ btrfs receive /mnt/btrfs -f /tmp/incremental.send The second btrfs receive command failed with: ERROR: rmdir o259-6-0 failed. Directory not empty A test case for xfstests follows. Signed-off-by: Filipe David Borba Manana <fdmanana@gmail.com> Signed-off-by: Josef Bacik <jbacik@fb.com>
2014-02-19 14:31:44 +00:00
Btrfs: fix wrong send_in_progress accounting Steps to reproduce: # mkfs.btrfs -f /dev/sda8 # mount /dev/sda8 /mnt # btrfs sub snapshot -r /mnt /mnt/snap1 # btrfs sub snapshot -r /mnt /mnt/snap2 # btrfs send /mnt/snap1 -p /mnt/snap2 -f /mnt/1 # dmesg The problem is that we will sort clone roots(include @send_root), it might push @send_root before thus @send_root's @send_in_progress will be decreased twice. Cc: David Sterba <dsterba@suse.cz> Signed-off-by: Wang Shilong <wangsl.fnst@cn.fujitsu.com> Signed-off-by: Josef Bacik <jbacik@fb.com> Signed-off-by: Chris Mason <clm@fb.com>
2014-01-07 17:25:18 +08:00
btrfs: check balance of send_in_progress Warn if the balance goes below zero, which appears to be unlikely though. Otherwise cleans up the code a bit. Signed-off-by: David Sterba <dsterba@suse.cz> Signed-off-by: Josef Bacik <jbacik@fb.com> Signed-off-by: Chris Mason <clm@fb.com>
2013-12-17 15:07:20 +01:00
btrfs: Check read-only status of roots during send All the subvolues that are involved in send must be read-only during the whole operation. The ioctl SUBVOL_SETFLAGS could be used to change the status to read-write and the result of send stream is undefined if the data change unexpectedly. Fix that by adding a refcount for all involved roots and verify that there's no send in progress during SUBVOL_SETFLAGS ioctl call that does read-only -> read-write transition. We need refcounts because there are no restrictions on number of send parallel operations currently run on a single subvolume, be it source, parent or one of the multiple clone sources. Kernel is silent when the RO checks fail and returns EPERM. The same set of checks is done already in userspace before send starts. Signed-off-by: David Sterba <dsterba@suse.cz> Signed-off-by: Josef Bacik <jbacik@fb.com> Signed-off-by: Chris Mason <clm@fb.com>
2013-12-16 17:34:17 +01:00
Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
2012-07-25 23:19:24 +02:00