2006-10-11 01:20:50 -07:00
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2006-10-11 01:20:53 -07:00
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2006-10-11 01:20:50 -07:00
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2009-04-27 22:48:48 -04:00
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2006-10-11 01:20:50 -07:00
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2015-05-22 17:13:32 -04:00
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2006-10-11 01:20:50 -07:00
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2007-07-17 04:04:28 -07:00
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2006-10-11 01:20:50 -07:00
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2009-03-31 09:10:09 -04:00
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2007-07-18 09:11:02 -04:00
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Ext4: Uninitialized Block Groups
In pass1 of e2fsck, every inode table in the fileystem is scanned and checked,
regardless of whether it is in use. This is this the most time consuming part
of the filesystem check. The unintialized block group feature can greatly
reduce e2fsck time by eliminating checking of uninitialized inodes.
With this feature, there is a a high water mark of used inodes for each block
group. Block and inode bitmaps can be uninitialized on disk via a flag in the
group descriptor to avoid reading or scanning them at e2fsck time. A checksum
of each group descriptor is used to ensure that corruption in the group
descriptor's bit flags does not cause incorrect operation.
The feature is enabled through a mkfs option
mke2fs /dev/ -O uninit_groups
A patch adding support for uninitialized block groups to e2fsprogs tools has
been posted to the linux-ext4 mailing list.
The patches have been stress tested with fsstress and fsx. In performance
tests testing e2fsck time, we have seen that e2fsck time on ext3 grows
linearly with the total number of inodes in the filesytem. In ext4 with the
uninitialized block groups feature, the e2fsck time is constant, based
solely on the number of used inodes rather than the total inode count.
Since typical ext4 filesystems only use 1-10% of their inodes, this feature can
greatly reduce e2fsck time for users. With performance improvement of 2-20
times, depending on how full the filesystem is.
The attached graph shows the major improvements in e2fsck times in filesystems
with a large total inode count, but few inodes in use.
In each group descriptor if we have
EXT4_BG_INODE_UNINIT set in bg_flags:
Inode table is not initialized/used in this group. So we can skip
the consistency check during fsck.
EXT4_BG_BLOCK_UNINIT set in bg_flags:
No block in the group is used. So we can skip the block bitmap
verification for this group.
We also add two new fields to group descriptor as a part of
uninitialized group patch.
__le16 bg_itable_unused; /* Unused inodes count */
__le16 bg_checksum; /* crc16(sb_uuid+group+desc) */
bg_itable_unused:
If we have EXT4_BG_INODE_UNINIT not set in bg_flags
then bg_itable_unused will give the offset within
the inode table till the inodes are used. This can be
used by fsck to skip list of inodes that are marked unused.
bg_checksum:
Now that we depend on bg_flags and bg_itable_unused to determine
the block and inode usage, we need to make sure group descriptor
is not corrupt. We add checksum to group descriptor to
detect corruption. If the descriptor is found to be corrupt, we
mark all the blocks and inodes in the group used.
Signed-off-by: Avantika Mathur <mathur@us.ibm.com>
Signed-off-by: Andreas Dilger <adilger@clusterfs.com>
Signed-off-by: Mingming Cao <cmm@us.ibm.com>
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
2007-10-16 18:38:25 -04:00
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2011-05-26 10:02:03 -06:00
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2006-10-11 01:20:50 -07:00
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ext4: add support for lazy inode table initialization
When the lazy_itable_init extended option is passed to mke2fs, it
considerably speeds up filesystem creation because inode tables are
not zeroed out. The fact that parts of the inode table are
uninitialized is not a problem so long as the block group descriptors,
which contain information regarding how much of the inode table has
been initialized, has not been corrupted However, if the block group
checksums are not valid, e2fsck must scan the entire inode table, and
the the old, uninitialized data could potentially cause e2fsck to
report false problems.
Hence, it is important for the inode tables to be initialized as soon
as possble. This commit adds this feature so that mke2fs can safely
use the lazy inode table initialization feature to speed up formatting
file systems.
This is done via a new new kernel thread called ext4lazyinit, which is
created on demand and destroyed, when it is no longer needed. There
is only one thread for all ext4 filesystems in the system. When the
first filesystem with inititable mount option is mounted, ext4lazyinit
thread is created, then the filesystem can register its request in the
request list.
This thread then walks through the list of requests picking up
scheduled requests and invoking ext4_init_inode_table(). Next schedule
time for the request is computed by multiplying the time it took to
zero out last inode table with wait multiplier, which can be set with
the (init_itable=n) mount option (default is 10). We are doing
this so we do not take the whole I/O bandwidth. When the thread is no
longer necessary (request list is empty) it frees the appropriate
structures and exits (and can be created later later by another
filesystem).
We do not disturb regular inode allocations in any way, it just do not
care whether the inode table is, or is not zeroed. But when zeroing, we
have to skip used inodes, obviously. Also we should prevent new inode
allocations from the group, while zeroing is on the way. For that we
take write alloc_sem lock in ext4_init_inode_table() and read alloc_sem
in the ext4_claim_inode, so when we are unlucky and allocator hits the
group which is currently being zeroed, it just has to wait.
This can be suppresed using the mount option no_init_itable.
Signed-off-by: Lukas Czerner <lczerner@redhat.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2010-10-27 21:30:05 -04:00
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2008-04-29 18:13:32 -04:00
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2012-11-28 13:03:30 -05:00
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2008-04-29 18:13:32 -04:00
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2006-10-11 01:20:50 -07:00
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2009-09-14 22:59:50 -04:00
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2006-10-11 01:20:50 -07:00
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2009-06-17 11:48:11 -04:00
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2011-02-23 12:22:49 -05:00
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2015-08-15 14:59:44 -04:00
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2008-09-23 09:18:24 -04:00
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2006-10-11 01:20:53 -07:00
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2006-10-11 01:20:50 -07:00
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2012-03-03 23:20:50 -05:00
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2009-05-01 00:33:44 -04:00
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2008-07-26 16:15:44 -04:00
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2006-10-11 01:20:53 -07:00
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2008-07-26 16:15:44 -04:00
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2009-01-09 16:40:58 -08:00
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2010-07-25 00:46:55 +04:00
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2011-04-18 17:29:14 -04:00
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2011-02-28 00:53:45 -05:00
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|
ext4: add support for lazy inode table initialization
When the lazy_itable_init extended option is passed to mke2fs, it
considerably speeds up filesystem creation because inode tables are
not zeroed out. The fact that parts of the inode table are
uninitialized is not a problem so long as the block group descriptors,
which contain information regarding how much of the inode table has
been initialized, has not been corrupted However, if the block group
checksums are not valid, e2fsck must scan the entire inode table, and
the the old, uninitialized data could potentially cause e2fsck to
report false problems.
Hence, it is important for the inode tables to be initialized as soon
as possble. This commit adds this feature so that mke2fs can safely
use the lazy inode table initialization feature to speed up formatting
file systems.
This is done via a new new kernel thread called ext4lazyinit, which is
created on demand and destroyed, when it is no longer needed. There
is only one thread for all ext4 filesystems in the system. When the
first filesystem with inititable mount option is mounted, ext4lazyinit
thread is created, then the filesystem can register its request in the
request list.
This thread then walks through the list of requests picking up
scheduled requests and invoking ext4_init_inode_table(). Next schedule
time for the request is computed by multiplying the time it took to
zero out last inode table with wait multiplier, which can be set with
the (init_itable=n) mount option (default is 10). We are doing
this so we do not take the whole I/O bandwidth. When the thread is no
longer necessary (request list is empty) it frees the appropriate
structures and exits (and can be created later later by another
filesystem).
We do not disturb regular inode allocations in any way, it just do not
care whether the inode table is, or is not zeroed. But when zeroing, we
have to skip used inodes, obviously. Also we should prevent new inode
allocations from the group, while zeroing is on the way. For that we
take write alloc_sem lock in ext4_init_inode_table() and read alloc_sem
in the ext4_claim_inode, so when we are unlucky and allocator hits the
group which is currently being zeroed, it just has to wait.
This can be suppresed using the mount option no_init_itable.
Signed-off-by: Lukas Czerner <lczerner@redhat.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2010-10-27 21:30:05 -04:00
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2011-02-03 14:33:15 -05:00
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2016-09-30 02:05:09 -04:00
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2006-10-11 01:20:50 -07:00
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2015-12-07 14:35:49 -05:00
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2015-06-18 16:52:29 +02:00
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2011-04-18 17:29:14 -04:00
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2013-03-02 19:39:14 -08:00
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2013-03-12 18:27:41 -07:00
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2011-04-18 17:29:14 -04:00
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2010-03-24 20:18:37 -04:00
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2010-07-25 00:46:55 +04:00
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2010-03-24 20:18:37 -04:00
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2013-03-02 19:39:14 -08:00
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2013-03-12 18:27:41 -07:00
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2010-03-24 20:18:37 -04:00
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2006-10-11 01:21:10 -07:00
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2012-04-29 18:25:10 -04:00
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2015-10-17 16:18:43 -04:00
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2012-04-29 18:25:10 -04:00
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2012-04-29 18:29:10 -04:00
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2014-05-12 10:50:23 -04:00
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2012-04-29 18:29:10 -04:00
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2014-10-13 03:36:16 -04:00
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2012-04-29 18:29:10 -04:00
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2012-10-10 01:06:58 -04:00
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2012-04-29 18:29:10 -04:00
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2012-10-10 01:06:58 -04:00
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2014-10-13 03:36:16 -04:00
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2012-04-29 18:29:10 -04:00
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2011-08-01 08:45:02 -04:00
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2013-06-19 12:15:53 -07:00
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2011-08-01 08:45:02 -04:00
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2013-06-19 12:15:53 -07:00
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2011-08-01 08:45:02 -04:00
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2006-10-11 01:21:15 -07:00
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2006-10-11 01:21:10 -07:00
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2007-10-16 18:38:25 -04:00
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2006-10-11 01:21:15 -07:00
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2009-06-03 17:59:28 -04:00
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2006-10-11 01:21:10 -07:00
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2006-10-11 01:21:15 -07:00
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2006-10-11 01:21:10 -07:00
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2007-10-16 18:38:25 -04:00
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2006-10-11 01:21:15 -07:00
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2009-06-03 17:59:28 -04:00
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2006-10-11 01:21:10 -07:00
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2006-10-11 01:21:15 -07:00
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2006-10-11 01:21:10 -07:00
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2007-10-16 18:38:25 -04:00
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2006-10-11 01:21:15 -07:00
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2009-06-03 17:59:28 -04:00
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2006-10-11 01:21:10 -07:00
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2011-09-09 19:08:51 -04:00
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2009-01-05 22:20:24 -05:00
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2009-06-03 17:59:28 -04:00
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2009-01-05 22:20:24 -05:00
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2009-06-03 17:59:28 -04:00
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2009-01-05 22:20:24 -05:00
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2009-06-03 17:59:28 -04:00
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2009-01-05 22:20:24 -05:00
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2009-06-03 17:59:28 -04:00
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2009-01-05 22:20:24 -05:00
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2006-10-11 01:21:15 -07:00
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2006-10-11 01:21:10 -07:00
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2007-10-16 18:38:25 -04:00
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2006-10-11 01:21:15 -07:00
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2006-10-11 01:21:10 -07:00
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2006-10-11 01:21:15 -07:00
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2006-10-11 01:21:10 -07:00
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2007-10-16 18:38:25 -04:00
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2006-10-11 01:21:15 -07:00
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2006-10-11 01:21:10 -07:00
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2006-10-11 01:21:15 -07:00
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2006-10-11 01:21:10 -07:00
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2007-10-16 18:38:25 -04:00
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2006-10-11 01:21:15 -07:00
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2006-10-11 01:21:10 -07:00
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2011-09-09 19:08:51 -04:00
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2009-01-05 22:20:24 -05:00
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2009-09-29 11:01:03 -04:00
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2010-07-27 11:56:03 -04:00
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2015-05-14 18:37:30 -04:00
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2010-07-27 11:56:03 -04:00
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2010-07-27 11:56:04 -04:00
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2012-09-27 09:37:53 -04:00
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2010-07-27 11:56:03 -04:00
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2015-08-16 10:03:57 -04:00
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2012-02-20 17:53:02 -05:00
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2013-04-03 22:08:52 -04:00
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2012-02-20 17:53:02 -05:00
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2013-04-03 22:08:52 -04:00
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2012-02-20 17:53:02 -05:00
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2013-04-03 22:08:52 -04:00
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2012-02-20 17:53:02 -05:00
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2010-07-27 11:56:03 -04:00
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2006-10-11 01:20:50 -07:00
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2006-10-11 01:20:53 -07:00
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2006-10-11 01:20:50 -07:00
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2006-10-11 01:21:01 -07:00
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2010-01-17 19:10:07 -02:00
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2006-10-11 01:20:50 -07:00
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2006-10-11 01:20:53 -07:00
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2006-10-11 01:20:50 -07:00
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2008-07-26 16:15:44 -04:00
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2006-10-11 01:20:53 -07:00
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2006-10-11 01:20:50 -07:00
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2009-06-13 10:09:36 -04:00
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2006-10-11 01:20:50 -07:00
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2006-10-11 01:21:01 -07:00
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2006-10-11 01:20:50 -07:00
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2008-07-26 16:15:44 -04:00
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2009-06-04 17:36:36 -04:00
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2013-06-12 22:38:04 -04:00
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2006-10-11 01:20:50 -07:00
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2015-10-18 17:02:56 -04:00
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2006-10-11 01:20:53 -07:00
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2006-10-11 01:20:50 -07:00
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2015-10-18 17:02:56 -04:00
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2006-10-11 01:20:50 -07:00
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2013-10-17 21:11:01 -04:00
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2010-02-15 14:19:27 -05:00
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2010-07-27 11:56:40 -04:00
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2006-10-11 01:20:50 -07:00
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2010-12-19 22:43:19 -05:00
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2006-10-11 01:20:50 -07:00
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2013-10-17 21:11:01 -04:00
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2012-05-30 23:00:16 -04:00
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2006-10-11 01:20:53 -07:00
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2006-10-11 01:20:50 -07:00
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2013-07-01 08:12:37 -04:00
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2010-03-02 11:46:09 -05:00
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2011-01-10 12:10:55 -05:00
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2010-07-27 11:56:03 -04:00
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2010-03-02 11:46:09 -05:00
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2010-07-27 11:56:03 -04:00
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2013-10-17 21:11:01 -04:00
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2010-07-27 11:56:03 -04:00
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2010-03-02 11:46:09 -05:00
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2013-07-01 08:12:37 -04:00
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2010-03-02 11:46:09 -05:00
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2011-01-10 12:10:55 -05:00
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2010-07-27 11:56:03 -04:00
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2013-01-23 17:07:38 -05:00
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2010-03-02 11:46:09 -05:00
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2010-07-27 11:56:03 -04:00
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2013-10-17 21:11:01 -04:00
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2015-06-19 10:29:13 +02:00
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2013-10-17 21:11:01 -04:00
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2010-07-27 11:56:03 -04:00
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2010-03-02 11:46:09 -05:00
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2013-02-08 13:00:31 -05:00
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2006-10-11 01:20:50 -07:00
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2015-10-17 16:16:04 -04:00
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2006-10-11 01:20:50 -07:00
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2009-07-27 23:09:47 -04:00
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2006-10-11 01:20:50 -07:00
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2006-10-11 01:20:53 -07:00
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2006-10-11 01:20:50 -07:00
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2010-07-27 11:56:40 -04:00
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2006-10-11 01:20:50 -07:00
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2013-10-17 21:11:01 -04:00
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2006-10-11 01:20:50 -07:00
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2013-10-17 21:11:01 -04:00
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2006-10-11 01:20:53 -07:00
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2006-10-11 01:20:50 -07:00
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2006-10-11 01:20:53 -07:00
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2006-10-11 01:20:50 -07:00
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2010-06-29 11:07:07 -04:00
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2010-07-27 11:56:40 -04:00
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2006-10-11 01:20:50 -07:00
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2016-10-12 23:12:53 -04:00
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2006-10-11 01:20:50 -07:00
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2010-07-27 11:56:03 -04:00
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2006-10-11 01:20:50 -07:00
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2016-10-12 23:12:53 -04:00
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2006-10-11 01:20:50 -07:00
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2010-07-27 11:56:03 -04:00
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2013-06-12 22:38:04 -04:00
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2010-07-27 11:56:03 -04:00
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2015-10-18 17:02:56 -04:00
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2006-10-11 01:20:53 -07:00
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2015-10-18 17:02:56 -04:00
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2006-10-11 01:20:50 -07:00
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2013-07-01 08:12:37 -04:00
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2009-06-04 17:36:36 -04:00
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2010-12-19 22:43:19 -05:00
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2009-06-04 17:36:36 -04:00
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2013-10-17 21:11:01 -04:00
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2009-06-04 17:36:36 -04:00
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2010-12-19 22:43:19 -05:00
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2009-06-04 17:36:36 -04:00
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2015-06-15 14:50:26 -04:00
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2010-02-15 14:19:27 -05:00
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2010-07-27 11:56:40 -04:00
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2006-10-11 01:20:50 -07:00
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2010-12-19 22:43:19 -05:00
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2006-10-11 01:20:50 -07:00
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2015-06-15 14:50:26 -04:00
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2013-10-17 21:11:01 -04:00
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2006-10-11 01:20:50 -07:00
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2010-12-19 22:43:19 -05:00
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2006-10-11 01:20:50 -07:00
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2015-06-15 14:50:26 -04:00
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2010-06-29 12:54:28 -04:00
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2009-01-05 22:19:52 -05:00
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2010-12-19 22:43:19 -05:00
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2009-01-05 22:19:52 -05:00
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2010-07-27 11:56:03 -04:00
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2010-12-19 22:43:19 -05:00
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2013-10-17 21:11:01 -04:00
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2009-01-05 22:19:52 -05:00
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2009-05-01 00:33:44 -04:00
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2009-01-05 22:19:52 -05:00
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2010-07-27 11:56:03 -04:00
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2009-01-05 22:19:52 -05:00
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2011-03-30 22:57:33 -03:00
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2009-01-05 22:19:52 -05:00
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2006-10-11 01:20:53 -07:00
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2006-10-11 01:20:50 -07:00
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2006-10-11 01:20:53 -07:00
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2006-10-11 01:20:50 -07:00
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2006-10-11 01:20:53 -07:00
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2006-10-11 01:20:50 -07:00
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2010-02-15 14:19:27 -05:00
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2006-10-11 01:20:50 -07:00
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2006-10-11 01:20:53 -07:00
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2006-10-11 01:20:50 -07:00
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2006-10-11 01:20:53 -07:00
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2006-10-11 01:20:50 -07:00
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2009-06-04 17:36:36 -04:00
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2006-10-11 01:20:50 -07:00
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2010-11-13 11:55:18 +01:00
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2006-10-11 01:20:50 -07:00
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2009-06-04 17:36:36 -04:00
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2006-10-11 01:20:50 -07:00
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2013-05-05 22:11:03 -04:00
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2006-10-11 01:20:50 -07:00
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2013-05-05 22:11:03 -04:00
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2006-10-11 01:20:50 -07:00
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2013-05-05 22:11:03 -04:00
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2006-10-11 01:20:50 -07:00
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2013-05-05 22:11:03 -04:00
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2006-10-11 01:20:50 -07:00
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2006-10-11 01:20:53 -07:00
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2006-10-11 01:20:50 -07:00
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2006-10-11 01:20:53 -07:00
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2006-10-11 01:20:50 -07:00
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2009-06-04 17:36:36 -04:00
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2006-10-11 01:20:50 -07:00
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2008-07-26 16:15:44 -04:00
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2006-10-11 01:20:50 -07:00
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2006-10-11 01:20:53 -07:00
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2017-02-04 23:38:06 -05:00
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2008-10-27 22:53:05 -04:00
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2006-10-11 01:20:50 -07:00
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2010-10-27 21:30:05 -04:00
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2010-05-19 07:16:42 -04:00
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2013-06-04 14:21:02 -04:00
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2009-09-28 15:48:41 -04:00
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2009-01-07 00:06:22 -05:00
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2017-02-04 23:38:06 -05:00
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2009-01-07 00:06:22 -05:00
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2017-02-04 23:38:06 -05:00
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2010-06-29 11:07:07 -04:00
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2009-01-07 00:06:22 -05:00
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2009-12-08 21:48:58 -05:00
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2015-09-23 12:46:17 -04:00
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2013-07-01 08:12:37 -04:00
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2013-12-08 20:52:31 -05:00
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2009-12-08 21:48:58 -05:00
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2017-02-04 23:38:06 -05:00
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2015-10-17 16:18:43 -04:00
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2006-10-11 01:20:50 -07:00
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2012-07-22 20:33:31 -04:00
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2012-03-21 22:29:15 -04:00
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2006-10-11 01:20:50 -07:00
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2014-11-20 12:19:11 -05:00
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2011-09-09 18:56:51 -04:00
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2006-10-11 01:20:50 -07:00
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2011-09-09 18:56:51 -04:00
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2016-04-25 23:22:35 -04:00
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2006-10-11 01:20:50 -07:00
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2014-09-11 11:15:15 -04:00
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2006-10-11 01:20:50 -07:00
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2015-06-20 22:50:33 -04:00
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2007-05-06 14:49:54 -07:00
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2006-10-11 01:20:50 -07:00
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2007-05-06 14:49:54 -07:00
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2006-10-11 01:20:53 -07:00
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2006-10-11 01:20:50 -07:00
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2014-03-18 19:24:49 -04:00
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2011-05-24 18:31:25 -04:00
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2006-10-11 01:20:50 -07:00
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2009-03-31 09:10:09 -04:00
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2012-04-29 18:27:10 -04:00
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2009-02-15 18:07:52 -05:00
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2006-10-11 01:20:50 -07:00
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2006-12-06 20:33:20 -08:00
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2006-10-11 01:20:50 -07:00
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2006-10-11 01:20:53 -07:00
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2006-10-11 01:20:50 -07:00
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2006-10-11 01:20:53 -07:00
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2006-10-11 01:20:50 -07:00
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2006-12-06 20:33:14 -08:00
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2006-10-11 01:20:50 -07:00
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2009-06-03 17:59:28 -04:00
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2006-10-11 01:20:50 -07:00
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2014-04-21 14:37:55 -04:00
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2008-01-29 00:19:52 -05:00
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2012-11-08 21:57:30 -05:00
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2014-11-25 11:45:37 -05:00
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2014-09-01 22:26:49 -04:00
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2014-11-25 11:45:37 -05:00
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2014-11-25 11:51:23 -05:00
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2008-07-14 17:52:37 -04:00
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2010-01-01 02:41:30 -05:00
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2012-08-05 23:28:16 -04:00
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2008-07-14 17:52:37 -04:00
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2009-12-14 15:21:14 +03:00
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2014-09-29 14:58:25 +02:00
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2009-12-14 15:21:14 +03:00
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2011-01-10 12:29:43 -05:00
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2013-06-04 14:21:02 -04:00
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2010-03-04 16:14:02 -05:00
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2009-12-08 23:51:10 -05:00
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2012-09-28 23:24:52 -04:00
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2013-06-04 14:21:02 -04:00
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2006-10-11 01:20:50 -07:00
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2010-11-08 13:51:33 -05:00
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2011-01-07 17:49:49 +11:00
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2006-10-11 01:20:53 -07:00
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2006-10-11 01:20:50 -07:00
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2007-07-15 23:40:45 -07:00
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2009-06-04 17:36:36 -04:00
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2007-07-15 23:40:45 -07:00
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2011-01-07 17:49:49 +11:00
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2006-10-11 01:20:50 -07:00
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2008-07-25 19:45:34 -07:00
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2006-10-11 01:20:50 -07:00
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2006-10-11 01:20:53 -07:00
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2006-10-11 01:20:50 -07:00
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2007-05-16 22:10:57 -07:00
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2008-01-28 23:58:26 -05:00
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2015-12-07 14:28:03 -05:00
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2007-05-16 22:10:57 -07:00
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2006-10-11 01:20:50 -07:00
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2014-02-17 20:34:53 -05:00
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2006-10-11 01:20:50 -07:00
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2006-10-11 01:20:53 -07:00
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2006-10-11 01:20:50 -07:00
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2016-01-14 15:18:21 -08:00
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2007-07-20 10:11:58 +09:00
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2006-10-11 01:20:53 -07:00
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2006-10-11 01:20:50 -07:00
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2012-09-26 11:33:07 +10:00
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2006-10-11 01:20:53 -07:00
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2006-10-11 01:20:50 -07:00
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2010-06-07 13:16:22 -04:00
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2006-10-11 01:20:50 -07:00
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2010-06-07 13:16:22 -04:00
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2012-05-03 14:48:02 +02:00
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2010-03-03 09:05:05 -05:00
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2008-10-10 09:40:52 -04:00
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2012-11-08 21:57:32 -05:00
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2011-01-10 12:29:43 -05:00
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ext4 crypto: reorganize how we store keys in the inode
This is a pretty massive patch which does a number of different things:
1) The per-inode encryption information is now stored in an allocated
data structure, ext4_crypt_info, instead of directly in the node.
This reduces the size usage of an in-memory inode when it is not
using encryption.
2) We drop the ext4_fname_crypto_ctx entirely, and use the per-inode
encryption structure instead. This remove an unnecessary memory
allocation and free for the fname_crypto_ctx as well as allowing us
to reuse the ctfm in a directory for multiple lookups and file
creations.
3) We also cache the inode's policy information in the ext4_crypt_info
structure so we don't have to continually read it out of the
extended attributes.
4) We now keep the keyring key in the inode's encryption structure
instead of releasing it after we are done using it to derive the
per-inode key. This allows us to test to see if the key has been
revoked; if it has, we prevent the use of the derived key and free
it.
5) When an inode is released (or when the derived key is freed), we
will use memset_explicit() to zero out the derived key, so it's not
left hanging around in memory. This implies that when a user logs
out, it is important to first revoke the key, and then unlink it,
and then finally, to use "echo 3 > /proc/sys/vm/drop_caches" to
release any decrypted pages and dcache entries from the system
caches.
6) All this, and we also shrink the number of lines of code by around
100. :-)
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
2015-05-18 13:17:47 -04:00
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|
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2016-07-10 14:01:03 -04:00
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|
|
ext4 crypto: reorganize how we store keys in the inode
This is a pretty massive patch which does a number of different things:
1) The per-inode encryption information is now stored in an allocated
data structure, ext4_crypt_info, instead of directly in the node.
This reduces the size usage of an in-memory inode when it is not
using encryption.
2) We drop the ext4_fname_crypto_ctx entirely, and use the per-inode
encryption structure instead. This remove an unnecessary memory
allocation and free for the fname_crypto_ctx as well as allowing us
to reuse the ctfm in a directory for multiple lookups and file
creations.
3) We also cache the inode's policy information in the ext4_crypt_info
structure so we don't have to continually read it out of the
extended attributes.
4) We now keep the keyring key in the inode's encryption structure
instead of releasing it after we are done using it to derive the
per-inode key. This allows us to test to see if the key has been
revoked; if it has, we prevent the use of the derived key and free
it.
5) When an inode is released (or when the derived key is freed), we
will use memset_explicit() to zero out the derived key, so it's not
left hanging around in memory. This implies that when a user logs
out, it is important to first revoke the key, and then unlink it,
and then finally, to use "echo 3 > /proc/sys/vm/drop_caches" to
release any decrypted pages and dcache entries from the system
caches.
6) All this, and we also shrink the number of lines of code by around
100. :-)
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
2015-05-18 13:17:47 -04:00
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2006-10-11 01:20:50 -07:00
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2007-10-21 16:42:08 -07:00
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2009-06-03 17:59:28 -04:00
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2006-10-11 01:20:50 -07:00
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2006-10-11 01:20:53 -07:00
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2006-10-11 01:20:50 -07:00
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2006-10-11 01:20:53 -07:00
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2006-10-11 01:20:50 -07:00
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2006-10-11 01:20:53 -07:00
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2006-10-11 01:20:50 -07:00
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ext4: add ext4_iget_normal() which is to be used for dir tree lookups
If there is a corrupted file system which has directory entries that
point at reserved, metadata inodes, prohibit them from being used by
treating them the same way we treat Boot Loader inodes --- that is,
mark them to be bad inodes. This prohibits them from being opened,
deleted, or modified via chmod, chown, utimes, etc.
In particular, this prevents a corrupted file system which has a
directory entry which points at the journal inode from being deleted
and its blocks released, after which point Much Hilarity Ensues.
Reported-by: Sami Liedes <sami.liedes@iki.fi>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Cc: stable@vger.kernel.org
2014-10-05 22:56:00 -04:00
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2008-02-07 00:15:37 -08:00
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2006-10-11 01:20:50 -07:00
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2007-10-21 16:42:08 -07:00
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2009-06-03 17:59:28 -04:00
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2007-10-21 16:42:08 -07:00
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2009-06-03 17:59:28 -04:00
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2007-10-21 16:42:08 -07:00
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2006-10-11 01:20:50 -07:00
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2009-01-05 22:38:48 -05:00
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2009-06-03 17:59:28 -04:00
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2009-01-05 22:38:48 -05:00
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2015-11-06 16:28:21 -08:00
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2009-01-05 22:38:48 -05:00
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2016-07-10 14:01:03 -04:00
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2006-10-11 01:20:50 -07:00
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2016-01-08 16:01:22 -05:00
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2006-10-11 01:20:50 -07:00
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2006-10-11 01:20:53 -07:00
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2008-04-28 02:14:34 -07:00
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2010-09-15 17:38:58 +02:00
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2010-08-01 17:48:36 -04:00
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2006-10-11 01:20:53 -07:00
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2006-10-11 01:20:50 -07:00
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2006-10-11 01:20:53 -07:00
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2006-10-11 01:20:50 -07:00
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ext4: make quota as first class supported feature
This patch adds support for quotas as a first class feature in ext4;
which is to say, the quota files are stored in hidden inodes as file
system metadata, instead of as separate files visible in the file system
directory hierarchy.
It is based on the proposal at:
https://ext4.wiki.kernel.org/index.php/Design_For_1st_Class_Quota_in_Ext4
This patch introduces a new feature - EXT4_FEATURE_RO_COMPAT_QUOTA
which, when turned on, enables quota accounting at mount time
iteself. Also, the quota inodes are stored in two additional superblock
fields. Some changes introduced by this patch that should be pointed
out are:
1) Two new ext4-superblock fields - s_usr_quota_inum and
s_grp_quota_inum for storing the quota inodes in use.
2) Default quota inodes are: inode#3 for tracking userquota and inode#4
for tracking group quota. The superblock fields can be set to use
other inodes as well.
3) If the QUOTA feature and corresponding quota inodes are set in
superblock, the quota usage tracking is turned on at mount time. On
'quotaon' ioctl, the quota limits enforcement is turned
on. 'quotaoff' ioctl turns off only the limits enforcement in this
case.
4) When QUOTA feature is in use, the quota mount options 'quota',
'usrquota', 'grpquota' are ignored by the kernel.
5) mke2fs or tune2fs can be used to set the QUOTA feature and initialize
quota inodes. The default reserved inodes will not be visible to user
as regular files.
6) The quota-tools will need to be modified to support hidden quota
files on ext4. E2fsprogs will also include support for creating and
fixing quota files.
7) Support is only for the new V2 quota file format.
Tested-by: Jan Kara <jack@suse.cz>
Reviewed-by: Jan Kara <jack@suse.cz>
Reviewed-by: Johann Lombardi <johann@whamcloud.com>
Signed-off-by: Aditya Kali <adityakali@google.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2012-07-22 20:21:31 -04:00
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2016-04-01 12:00:03 -04:00
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2006-10-11 01:20:50 -07:00
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2014-09-29 14:58:25 +02:00
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2009-09-21 17:01:08 -07:00
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2009-01-22 18:13:05 +01:00
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2006-10-11 01:20:53 -07:00
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2008-11-25 15:31:35 +01:00
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2016-01-08 16:01:21 -05:00
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2016-04-01 12:00:03 -04:00
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2006-10-11 01:20:50 -07:00
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2009-09-21 17:01:09 -07:00
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2006-10-11 01:20:53 -07:00
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2010-08-01 17:48:36 -04:00
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2010-05-19 07:16:45 -04:00
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2014-11-19 00:42:09 +01:00
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2010-05-19 07:16:45 -04:00
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2016-02-19 19:19:01 +01:00
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2006-10-11 01:20:50 -07:00
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2007-02-12 00:55:41 -08:00
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2006-10-11 01:20:53 -07:00
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2010-11-08 13:51:33 -05:00
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2010-06-07 13:16:22 -04:00
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2006-10-11 01:20:53 -07:00
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2009-01-09 16:40:58 -08:00
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2006-10-11 01:20:53 -07:00
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2006-10-11 01:20:50 -07:00
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2006-10-11 01:20:53 -07:00
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2014-09-29 14:58:25 +02:00
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2006-10-11 01:20:50 -07:00
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2009-01-05 22:38:48 -05:00
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2006-10-11 01:20:50 -07:00
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2007-10-21 16:42:17 -07:00
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2007-10-21 16:42:08 -07:00
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2006-10-11 01:20:53 -07:00
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2006-10-11 01:20:50 -07:00
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2012-03-03 18:04:40 -05:00
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2006-10-11 01:20:50 -07:00
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2012-03-03 18:04:40 -05:00
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|
ext4: allow specifying external journal by pathname mount option
It's always been a hassle that if an external journal's
device number changes, the filesystem won't mount.
And since boot-time enumeration can change, device number
changes aren't unusual.
The current mechanism to update the journal location is by
passing in a mount option w/ a new devnum, but that's a hassle;
it's a manual approach, fixing things after the fact.
Adding a mount option, "-o journal_path=/dev/$DEVICE" would
help, since then we can do i.e.
# mount -o journal_path=/dev/disk/by-label/$JOURNAL_LABEL ...
and it'll mount even if the devnum has changed, as shown here:
# losetup /dev/loop0 journalfile
# mke2fs -L mylabel-journal -O journal_dev /dev/loop0
# mkfs.ext4 -L mylabel -J device=/dev/loop0 /dev/sdb1
Change the journal device number:
# losetup -d /dev/loop0
# losetup /dev/loop1 journalfile
And today it will fail:
# mount /dev/sdb1 /mnt/test
mount: wrong fs type, bad option, bad superblock on /dev/sdb1,
missing codepage or helper program, or other error
In some cases useful info is found in syslog - try
dmesg | tail or so
# dmesg | tail -n 1
[17343.240702] EXT4-fs (sdb1): error: couldn't read superblock of external journal
But with this new mount option, we can specify the new path:
# mount -o journal_path=/dev/loop1 /dev/sdb1 /mnt/test
#
(which does update the encoded device number, incidentally):
# umount /dev/sdb1
# dumpe2fs -h /dev/sdb1 | grep "Journal device"
dumpe2fs 1.41.12 (17-May-2010)
Journal device: 0x0701
But best of all we can just always mount by journal-path, and
it'll always work:
# mount -o journal_path=/dev/disk/by-label/mylabel-journal /dev/sdb1 /mnt/test
#
So the journal_path option can be specified in fstab, and as long as
the disk is available somewhere, and findable by label (or by UUID),
we can mount.
Signed-off-by: Eric Sandeen <sandeen@redhat.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Reviewed-by: Jan Kara <jack@suse.cz>
Reviewed-by: Carlos Maiolino <cmaiolino@redhat.com>
2013-08-28 19:05:07 -04:00
|
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2006-10-11 01:20:50 -07:00
|
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|
2015-04-16 01:56:00 -04:00
|
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|
2006-10-11 01:20:50 -07:00
|
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|
2009-11-30 23:58:32 +01:00
|
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|
2012-03-02 12:14:24 -05:00
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|
2016-09-05 23:08:16 -04:00
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|
ext4: Turn off multiple page-io submission by default
Jon Nelson has found a test case which causes postgresql to fail with
the error:
psql:t.sql:4: ERROR: invalid page header in block 38269 of relation base/16384/16581
Under memory pressure, it looks like part of a file can end up getting
replaced by zero's. Until we can figure out the cause, we'll roll
back the change and use block_write_full_page() instead of
ext4_bio_write_page(). The new, more efficient writing function can
be used via the mount option mblk_io_submit, so we can test and fix
the new page I/O code.
To reproduce the problem, install postgres 8.4 or 9.0, and pin enough
memory such that the system just at the end of triggering writeback
before running the following sql script:
begin;
create temporary table foo as select x as a, ARRAY[x] as b FROM
generate_series(1, 10000000 ) AS x;
create index foo_a_idx on foo (a);
create index foo_b_idx on foo USING GIN (b);
rollback;
If the temporary table is created on a hard drive partition which is
encrypted using dm_crypt, then under memory pressure, approximately
30-40% of the time, pgsql will issue the above failure.
This patch should fix this problem, and the problem will come back if
the file system is mounted with the mblk_io_submit mount option.
Reported-by: Jon Nelson <jnelson@jamponi.net>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2010-12-14 15:27:50 -05:00
|
|
|
|
2015-02-02 00:37:02 -05:00
|
|
|
|
ext4: Turn off multiple page-io submission by default
Jon Nelson has found a test case which causes postgresql to fail with
the error:
psql:t.sql:4: ERROR: invalid page header in block 38269 of relation base/16384/16581
Under memory pressure, it looks like part of a file can end up getting
replaced by zero's. Until we can figure out the cause, we'll roll
back the change and use block_write_full_page() instead of
ext4_bio_write_page(). The new, more efficient writing function can
be used via the mount option mblk_io_submit, so we can test and fix
the new page I/O code.
To reproduce the problem, install postgres 8.4 or 9.0, and pin enough
memory such that the system just at the end of triggering writeback
before running the following sql script:
begin;
create temporary table foo as select x as a, ARRAY[x] as b FROM
generate_series(1, 10000000 ) AS x;
create index foo_a_idx on foo (a);
create index foo_b_idx on foo USING GIN (b);
rollback;
If the temporary table is created on a hard drive partition which is
encrypted using dm_crypt, then under memory pressure, approximately
30-40% of the time, pgsql will issue the above failure.
This patch should fix this problem, and the problem will come back if
the file system is mounted with the mblk_io_submit mount option.
Reported-by: Jon Nelson <jnelson@jamponi.net>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2010-12-14 15:27:50 -05:00
|
|
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|
2009-11-19 14:25:42 -05:00
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2010-03-04 16:14:02 -05:00
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|
2011-12-12 22:06:18 -05:00
|
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2014-11-25 16:20:50 -05:00
|
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|
2006-10-11 01:20:50 -07:00
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2008-10-13 10:46:57 +01:00
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2006-10-11 01:20:50 -07:00
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2012-03-03 18:04:40 -05:00
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2006-10-11 01:20:50 -07:00
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2009-11-19 14:28:50 -05:00
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2012-03-04 19:27:31 -05:00
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2012-03-03 18:04:40 -05:00
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2006-10-11 01:20:50 -07:00
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2009-01-03 20:27:38 -05:00
|
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2006-10-11 01:20:50 -07:00
|
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|
|
ext4: allow specifying external journal by pathname mount option
It's always been a hassle that if an external journal's
device number changes, the filesystem won't mount.
And since boot-time enumeration can change, device number
changes aren't unusual.
The current mechanism to update the journal location is by
passing in a mount option w/ a new devnum, but that's a hassle;
it's a manual approach, fixing things after the fact.
Adding a mount option, "-o journal_path=/dev/$DEVICE" would
help, since then we can do i.e.
# mount -o journal_path=/dev/disk/by-label/$JOURNAL_LABEL ...
and it'll mount even if the devnum has changed, as shown here:
# losetup /dev/loop0 journalfile
# mke2fs -L mylabel-journal -O journal_dev /dev/loop0
# mkfs.ext4 -L mylabel -J device=/dev/loop0 /dev/sdb1
Change the journal device number:
# losetup -d /dev/loop0
# losetup /dev/loop1 journalfile
And today it will fail:
# mount /dev/sdb1 /mnt/test
mount: wrong fs type, bad option, bad superblock on /dev/sdb1,
missing codepage or helper program, or other error
In some cases useful info is found in syslog - try
dmesg | tail or so
# dmesg | tail -n 1
[17343.240702] EXT4-fs (sdb1): error: couldn't read superblock of external journal
But with this new mount option, we can specify the new path:
# mount -o journal_path=/dev/loop1 /dev/sdb1 /mnt/test
#
(which does update the encoded device number, incidentally):
# umount /dev/sdb1
# dumpe2fs -h /dev/sdb1 | grep "Journal device"
dumpe2fs 1.41.12 (17-May-2010)
Journal device: 0x0701
But best of all we can just always mount by journal-path, and
it'll always work:
# mount -o journal_path=/dev/disk/by-label/mylabel-journal /dev/sdb1 /mnt/test
#
So the journal_path option can be specified in fstab, and as long as
the disk is available somewhere, and findable by label (or by UUID),
we can mount.
Signed-off-by: Eric Sandeen <sandeen@redhat.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Reviewed-by: Jan Kara <jack@suse.cz>
Reviewed-by: Carlos Maiolino <cmaiolino@redhat.com>
2013-08-28 19:05:07 -04:00
|
|
|
|
2008-01-28 23:58:27 -05:00
|
|
|
|
2014-11-25 16:20:50 -05:00
|
|
|
|
2008-01-28 23:58:27 -05:00
|
|
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|
2006-10-11 01:20:50 -07:00
|
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|
2008-10-10 22:12:43 -04:00
|
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2006-10-11 01:20:50 -07:00
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2009-11-30 23:58:32 +01:00
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2006-10-11 01:20:50 -07:00
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2016-09-05 23:08:16 -04:00
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2006-10-11 01:20:50 -07:00
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2009-03-28 10:59:57 -04:00
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2008-01-28 23:58:27 -05:00
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2015-02-16 15:59:38 -08:00
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2008-01-29 00:19:52 -05:00
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2008-07-11 19:27:31 -04:00
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2015-02-02 00:37:02 -05:00
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2008-07-11 19:27:31 -04:00
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2013-01-28 09:30:52 -05:00
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2009-05-17 15:38:01 -04:00
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2008-10-09 23:53:47 -04:00
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2009-01-05 22:46:26 -05:00
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2009-03-16 23:12:23 -04:00
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2009-03-28 10:59:57 -04:00
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2010-03-04 16:14:02 -05:00
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2009-11-19 14:25:42 -05:00
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2011-12-12 22:06:18 -05:00
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2012-08-17 09:48:17 -04:00
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2015-04-16 01:56:00 -04:00
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2012-03-04 22:00:53 -05:00
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2008-04-29 22:05:28 -04:00
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2006-10-11 01:20:50 -07:00
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2006-10-11 01:20:53 -07:00
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2006-10-11 01:20:50 -07:00
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2006-10-11 01:20:53 -07:00
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2006-10-11 01:20:50 -07:00
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2009-06-03 17:59:28 -04:00
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2006-10-11 01:20:50 -07:00
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2009-06-03 17:59:28 -04:00
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2006-10-11 01:20:50 -07:00
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2008-09-08 23:00:52 -04:00
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2006-10-11 01:20:50 -07:00
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2009-06-03 17:59:28 -04:00
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2006-10-11 01:20:50 -07:00
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2009-01-05 22:46:26 -05:00
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2010-03-01 22:29:21 -05:00
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2009-01-05 22:46:26 -05:00
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2010-03-01 23:28:41 -05:00
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2013-01-24 23:24:58 -05:00
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2010-03-01 23:28:41 -05:00
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2012-04-16 18:55:26 -04:00
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2010-03-01 23:28:41 -05:00
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2015-10-17 16:18:43 -04:00
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2016-04-03 17:03:37 -04:00
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2013-03-02 17:57:08 -05:00
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2010-03-01 23:28:41 -05:00
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2012-04-16 18:55:26 -04:00
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2010-03-01 23:28:41 -05:00
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2013-01-24 23:24:58 -05:00
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2010-03-01 23:28:41 -05:00
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2013-01-24 23:24:58 -05:00
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2010-03-01 23:28:41 -05:00
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2013-01-24 23:24:58 -05:00
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2010-03-01 23:28:41 -05:00
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2013-01-24 23:24:58 -05:00
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2010-12-15 20:26:48 -05:00
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2010-03-01 23:28:41 -05:00
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2013-01-24 23:24:58 -05:00
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2010-03-01 23:28:41 -05:00
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2012-04-16 18:55:26 -04:00
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2010-03-01 23:28:41 -05:00
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2013-01-24 23:24:58 -05:00
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2010-03-01 23:28:41 -05:00
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2012-03-03 23:20:47 -05:00
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2006-10-11 01:20:50 -07:00
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2012-03-03 23:20:47 -05:00
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2006-10-11 01:20:50 -07:00
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2012-03-03 23:20:47 -05:00
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2013-02-02 23:38:39 -05:00
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ext4: allow specifying external journal by pathname mount option
It's always been a hassle that if an external journal's
device number changes, the filesystem won't mount.
And since boot-time enumeration can change, device number
changes aren't unusual.
The current mechanism to update the journal location is by
passing in a mount option w/ a new devnum, but that's a hassle;
it's a manual approach, fixing things after the fact.
Adding a mount option, "-o journal_path=/dev/$DEVICE" would
help, since then we can do i.e.
# mount -o journal_path=/dev/disk/by-label/$JOURNAL_LABEL ...
and it'll mount even if the devnum has changed, as shown here:
# losetup /dev/loop0 journalfile
# mke2fs -L mylabel-journal -O journal_dev /dev/loop0
# mkfs.ext4 -L mylabel -J device=/dev/loop0 /dev/sdb1
Change the journal device number:
# losetup -d /dev/loop0
# losetup /dev/loop1 journalfile
And today it will fail:
# mount /dev/sdb1 /mnt/test
mount: wrong fs type, bad option, bad superblock on /dev/sdb1,
missing codepage or helper program, or other error
In some cases useful info is found in syslog - try
dmesg | tail or so
# dmesg | tail -n 1
[17343.240702] EXT4-fs (sdb1): error: couldn't read superblock of external journal
But with this new mount option, we can specify the new path:
# mount -o journal_path=/dev/loop1 /dev/sdb1 /mnt/test
#
(which does update the encoded device number, incidentally):
# umount /dev/sdb1
# dumpe2fs -h /dev/sdb1 | grep "Journal device"
dumpe2fs 1.41.12 (17-May-2010)
Journal device: 0x0701
But best of all we can just always mount by journal-path, and
it'll always work:
# mount -o journal_path=/dev/disk/by-label/mylabel-journal /dev/sdb1 /mnt/test
#
So the journal_path option can be specified in fstab, and as long as
the disk is available somewhere, and findable by label (or by UUID),
we can mount.
Signed-off-by: Eric Sandeen <sandeen@redhat.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Reviewed-by: Jan Kara <jack@suse.cz>
Reviewed-by: Carlos Maiolino <cmaiolino@redhat.com>
2013-08-28 19:05:07 -04:00
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2012-03-03 23:20:47 -05:00
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2013-02-02 23:38:39 -05:00
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2012-03-03 23:20:47 -05:00
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2013-02-02 23:38:39 -05:00
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2013-08-08 23:01:24 -04:00
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2014-11-25 16:20:50 -05:00
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2013-02-02 23:38:39 -05:00
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ext4: do not allow journal_opts for fs w/o journal
It is appeared that we can pass journal related mount options and such options
be shown in /proc/mounts
Example:
#mkfs.ext4 -F /dev/vdb
#tune2fs -O ^has_journal /dev/vdb
#mount /dev/vdb /mnt/ -ocommit=20,journal_async_commit
#cat /proc/mounts | grep /mnt
/dev/vdb /mnt ext4 rw,relatime,journal_checksum,journal_async_commit,commit=20,data=ordered 0 0
But options:"journal_checksum,journal_async_commit,commit=20,data=ordered" has
nothing with reality because there is no journal at all.
This patch disallow following options for journalless configurations:
- journal_checksum
- journal_async_commit
- commit=%ld
- data={writeback,ordered,journal}
Signed-off-by: Dmitry Monakhov <dmonakhov@openvz.org>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Reviewed-by: Andreas Dilger <adilger@dilger.ca>
2015-10-18 23:50:26 -04:00
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2012-03-03 23:20:47 -05:00
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2013-02-02 23:38:39 -05:00
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ext4: do not allow journal_opts for fs w/o journal
It is appeared that we can pass journal related mount options and such options
be shown in /proc/mounts
Example:
#mkfs.ext4 -F /dev/vdb
#tune2fs -O ^has_journal /dev/vdb
#mount /dev/vdb /mnt/ -ocommit=20,journal_async_commit
#cat /proc/mounts | grep /mnt
/dev/vdb /mnt ext4 rw,relatime,journal_checksum,journal_async_commit,commit=20,data=ordered 0 0
But options:"journal_checksum,journal_async_commit,commit=20,data=ordered" has
nothing with reality because there is no journal at all.
This patch disallow following options for journalless configurations:
- journal_checksum
- journal_async_commit
- commit=%ld
- data={writeback,ordered,journal}
Signed-off-by: Dmitry Monakhov <dmonakhov@openvz.org>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Reviewed-by: Andreas Dilger <adilger@dilger.ca>
2015-10-18 23:50:26 -04:00
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2013-02-02 23:38:39 -05:00
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2012-03-03 23:20:47 -05:00
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2013-02-02 23:38:39 -05:00
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2016-03-12 21:55:50 -05:00
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2013-02-02 23:38:39 -05:00
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2016-03-12 21:55:50 -05:00
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2012-03-03 23:20:47 -05:00
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2015-02-16 15:59:38 -08:00
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2012-03-03 23:20:47 -05:00
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2013-02-02 22:52:19 -05:00
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2015-07-21 23:57:59 -04:00
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2013-02-02 23:38:39 -05:00
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2012-03-03 23:20:47 -05:00
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2008-10-10 20:02:48 -04:00
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2012-03-03 23:20:47 -05:00
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2006-10-11 01:20:50 -07:00
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2012-03-03 23:20:47 -05:00
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2006-10-11 01:20:50 -07:00
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2012-03-03 23:20:47 -05:00
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2016-09-05 23:08:16 -04:00
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2012-03-03 23:20:47 -05:00
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2016-09-05 23:08:16 -04:00
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2012-03-03 23:20:47 -05:00
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2012-08-17 09:48:17 -04:00
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2015-04-16 01:56:00 -04:00
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2012-03-03 23:20:47 -05:00
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2012-02-07 15:41:49 -08:00
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2012-03-03 23:20:47 -05:00
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2012-04-16 18:55:26 -04:00
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2012-03-03 23:20:47 -05:00
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2012-03-04 22:06:20 -05:00
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2012-03-03 23:20:47 -05:00
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2013-02-02 23:09:36 -05:00
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2012-03-03 23:20:47 -05:00
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2015-02-02 00:37:02 -05:00
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2012-03-03 23:20:47 -05:00
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2013-02-02 23:09:36 -05:00
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2013-02-02 23:38:39 -05:00
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ext4: allow specifying external journal by pathname mount option
It's always been a hassle that if an external journal's
device number changes, the filesystem won't mount.
And since boot-time enumeration can change, device number
changes aren't unusual.
The current mechanism to update the journal location is by
passing in a mount option w/ a new devnum, but that's a hassle;
it's a manual approach, fixing things after the fact.
Adding a mount option, "-o journal_path=/dev/$DEVICE" would
help, since then we can do i.e.
# mount -o journal_path=/dev/disk/by-label/$JOURNAL_LABEL ...
and it'll mount even if the devnum has changed, as shown here:
# losetup /dev/loop0 journalfile
# mke2fs -L mylabel-journal -O journal_dev /dev/loop0
# mkfs.ext4 -L mylabel -J device=/dev/loop0 /dev/sdb1
Change the journal device number:
# losetup -d /dev/loop0
# losetup /dev/loop1 journalfile
And today it will fail:
# mount /dev/sdb1 /mnt/test
mount: wrong fs type, bad option, bad superblock on /dev/sdb1,
missing codepage or helper program, or other error
In some cases useful info is found in syslog - try
dmesg | tail or so
# dmesg | tail -n 1
[17343.240702] EXT4-fs (sdb1): error: couldn't read superblock of external journal
But with this new mount option, we can specify the new path:
# mount -o journal_path=/dev/loop1 /dev/sdb1 /mnt/test
#
(which does update the encoded device number, incidentally):
# umount /dev/sdb1
# dumpe2fs -h /dev/sdb1 | grep "Journal device"
dumpe2fs 1.41.12 (17-May-2010)
Journal device: 0x0701
But best of all we can just always mount by journal-path, and
it'll always work:
# mount -o journal_path=/dev/disk/by-label/mylabel-journal /dev/sdb1 /mnt/test
#
So the journal_path option can be specified in fstab, and as long as
the disk is available somewhere, and findable by label (or by UUID),
we can mount.
Signed-off-by: Eric Sandeen <sandeen@redhat.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Reviewed-by: Jan Kara <jack@suse.cz>
Reviewed-by: Carlos Maiolino <cmaiolino@redhat.com>
2013-08-28 19:05:07 -04:00
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2013-02-02 23:09:36 -05:00
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2015-10-18 23:35:32 -04:00
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ext4: do not allow journal_opts for fs w/o journal
It is appeared that we can pass journal related mount options and such options
be shown in /proc/mounts
Example:
#mkfs.ext4 -F /dev/vdb
#tune2fs -O ^has_journal /dev/vdb
#mount /dev/vdb /mnt/ -ocommit=20,journal_async_commit
#cat /proc/mounts | grep /mnt
/dev/vdb /mnt ext4 rw,relatime,journal_checksum,journal_async_commit,commit=20,data=ordered 0 0
But options:"journal_checksum,journal_async_commit,commit=20,data=ordered" has
nothing with reality because there is no journal at all.
This patch disallow following options for journalless configurations:
- journal_checksum
- journal_async_commit
- commit=%ld
- data={writeback,ordered,journal}
Signed-off-by: Dmitry Monakhov <dmonakhov@openvz.org>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Reviewed-by: Andreas Dilger <adilger@dilger.ca>
2015-10-18 23:50:26 -04:00
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2015-10-18 23:35:32 -04:00
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2013-02-02 23:09:36 -05:00
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2013-02-02 23:14:31 -05:00
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2012-03-03 23:20:47 -05:00
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2013-02-02 23:09:36 -05:00
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2012-03-03 23:20:47 -05:00
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2013-02-02 23:09:36 -05:00
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ext4: allow specifying external journal by pathname mount option
It's always been a hassle that if an external journal's
device number changes, the filesystem won't mount.
And since boot-time enumeration can change, device number
changes aren't unusual.
The current mechanism to update the journal location is by
passing in a mount option w/ a new devnum, but that's a hassle;
it's a manual approach, fixing things after the fact.
Adding a mount option, "-o journal_path=/dev/$DEVICE" would
help, since then we can do i.e.
# mount -o journal_path=/dev/disk/by-label/$JOURNAL_LABEL ...
and it'll mount even if the devnum has changed, as shown here:
# losetup /dev/loop0 journalfile
# mke2fs -L mylabel-journal -O journal_dev /dev/loop0
# mkfs.ext4 -L mylabel -J device=/dev/loop0 /dev/sdb1
Change the journal device number:
# losetup -d /dev/loop0
# losetup /dev/loop1 journalfile
And today it will fail:
# mount /dev/sdb1 /mnt/test
mount: wrong fs type, bad option, bad superblock on /dev/sdb1,
missing codepage or helper program, or other error
In some cases useful info is found in syslog - try
dmesg | tail or so
# dmesg | tail -n 1
[17343.240702] EXT4-fs (sdb1): error: couldn't read superblock of external journal
But with this new mount option, we can specify the new path:
# mount -o journal_path=/dev/loop1 /dev/sdb1 /mnt/test
#
(which does update the encoded device number, incidentally):
# umount /dev/sdb1
# dumpe2fs -h /dev/sdb1 | grep "Journal device"
dumpe2fs 1.41.12 (17-May-2010)
Journal device: 0x0701
But best of all we can just always mount by journal-path, and
it'll always work:
# mount -o journal_path=/dev/disk/by-label/mylabel-journal /dev/sdb1 /mnt/test
#
So the journal_path option can be specified in fstab, and as long as
the disk is available somewhere, and findable by label (or by UUID),
we can mount.
Signed-off-by: Eric Sandeen <sandeen@redhat.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Reviewed-by: Jan Kara <jack@suse.cz>
Reviewed-by: Carlos Maiolino <cmaiolino@redhat.com>
2013-08-28 19:05:07 -04:00
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2015-03-17 22:25:59 +00:00
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ext4: allow specifying external journal by pathname mount option
It's always been a hassle that if an external journal's
device number changes, the filesystem won't mount.
And since boot-time enumeration can change, device number
changes aren't unusual.
The current mechanism to update the journal location is by
passing in a mount option w/ a new devnum, but that's a hassle;
it's a manual approach, fixing things after the fact.
Adding a mount option, "-o journal_path=/dev/$DEVICE" would
help, since then we can do i.e.
# mount -o journal_path=/dev/disk/by-label/$JOURNAL_LABEL ...
and it'll mount even if the devnum has changed, as shown here:
# losetup /dev/loop0 journalfile
# mke2fs -L mylabel-journal -O journal_dev /dev/loop0
# mkfs.ext4 -L mylabel -J device=/dev/loop0 /dev/sdb1
Change the journal device number:
# losetup -d /dev/loop0
# losetup /dev/loop1 journalfile
And today it will fail:
# mount /dev/sdb1 /mnt/test
mount: wrong fs type, bad option, bad superblock on /dev/sdb1,
missing codepage or helper program, or other error
In some cases useful info is found in syslog - try
dmesg | tail or so
# dmesg | tail -n 1
[17343.240702] EXT4-fs (sdb1): error: couldn't read superblock of external journal
But with this new mount option, we can specify the new path:
# mount -o journal_path=/dev/loop1 /dev/sdb1 /mnt/test
#
(which does update the encoded device number, incidentally):
# umount /dev/sdb1
# dumpe2fs -h /dev/sdb1 | grep "Journal device"
dumpe2fs 1.41.12 (17-May-2010)
Journal device: 0x0701
But best of all we can just always mount by journal-path, and
it'll always work:
# mount -o journal_path=/dev/disk/by-label/mylabel-journal /dev/sdb1 /mnt/test
#
So the journal_path option can be specified in fstab, and as long as
the disk is available somewhere, and findable by label (or by UUID),
we can mount.
Signed-off-by: Eric Sandeen <sandeen@redhat.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Reviewed-by: Jan Kara <jack@suse.cz>
Reviewed-by: Carlos Maiolino <cmaiolino@redhat.com>
2013-08-28 19:05:07 -04:00
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2013-02-02 23:09:36 -05:00
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2015-04-16 01:56:00 -04:00
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2013-02-02 23:09:36 -05:00
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2013-02-02 22:52:19 -05:00
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2012-03-03 23:20:47 -05:00
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2006-10-11 01:20:50 -07:00
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2012-03-03 23:20:47 -05:00
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2013-02-02 23:09:36 -05:00
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2006-10-11 01:20:50 -07:00
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2013-02-02 23:09:36 -05:00
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2015-10-17 16:18:43 -04:00
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2016-04-03 17:03:37 -04:00
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2013-03-02 17:57:08 -05:00
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2016-04-03 17:03:37 -04:00
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2013-03-02 17:57:08 -05:00
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2013-02-02 23:09:36 -05:00
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2015-02-16 15:59:38 -08:00
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2015-09-29 15:48:11 -04:00
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2015-02-16 15:59:38 -08:00
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2013-02-02 23:09:36 -05:00
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2016-03-12 21:55:50 -05:00
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2013-02-02 23:09:36 -05:00
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2012-03-03 23:20:47 -05:00
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2013-02-02 23:09:36 -05:00
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2012-03-03 23:20:47 -05:00
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2012-08-18 22:29:18 -04:00
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2012-03-03 23:20:47 -05:00
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2006-10-11 01:20:50 -07:00
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2016-09-05 23:08:16 -04:00
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2010-02-24 11:35:32 -05:00
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2010-12-15 20:26:48 -05:00
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2006-10-11 01:20:50 -07:00
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2010-02-24 11:35:32 -05:00
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2010-12-15 20:26:48 -05:00
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2006-10-11 01:20:50 -07:00
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2010-03-01 23:28:41 -05:00
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2009-06-04 17:36:36 -04:00
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2006-10-11 01:20:50 -07:00
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2009-06-04 17:36:36 -04:00
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2006-10-11 01:20:50 -07:00
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2012-12-20 00:07:18 -05:00
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mm, fs: get rid of PAGE_CACHE_* and page_cache_{get,release} macros
PAGE_CACHE_{SIZE,SHIFT,MASK,ALIGN} macros were introduced *long* time
ago with promise that one day it will be possible to implement page
cache with bigger chunks than PAGE_SIZE.
This promise never materialized. And unlikely will.
We have many places where PAGE_CACHE_SIZE assumed to be equal to
PAGE_SIZE. And it's constant source of confusion on whether
PAGE_CACHE_* or PAGE_* constant should be used in a particular case,
especially on the border between fs and mm.
Global switching to PAGE_CACHE_SIZE != PAGE_SIZE would cause to much
breakage to be doable.
Let's stop pretending that pages in page cache are special. They are
not.
The changes are pretty straight-forward:
- <foo> << (PAGE_CACHE_SHIFT - PAGE_SHIFT) -> <foo>;
- <foo> >> (PAGE_CACHE_SHIFT - PAGE_SHIFT) -> <foo>;
- PAGE_CACHE_{SIZE,SHIFT,MASK,ALIGN} -> PAGE_{SIZE,SHIFT,MASK,ALIGN};
- page_cache_get() -> get_page();
- page_cache_release() -> put_page();
This patch contains automated changes generated with coccinelle using
script below. For some reason, coccinelle doesn't patch header files.
I've called spatch for them manually.
The only adjustment after coccinelle is revert of changes to
PAGE_CAHCE_ALIGN definition: we are going to drop it later.
There are few places in the code where coccinelle didn't reach. I'll
fix them manually in a separate patch. Comments and documentation also
will be addressed with the separate patch.
virtual patch
@@
expression E;
@@
- E << (PAGE_CACHE_SHIFT - PAGE_SHIFT)
+ E
@@
expression E;
@@
- E >> (PAGE_CACHE_SHIFT - PAGE_SHIFT)
+ E
@@
@@
- PAGE_CACHE_SHIFT
+ PAGE_SHIFT
@@
@@
- PAGE_CACHE_SIZE
+ PAGE_SIZE
@@
@@
- PAGE_CACHE_MASK
+ PAGE_MASK
@@
expression E;
@@
- PAGE_CACHE_ALIGN(E)
+ PAGE_ALIGN(E)
@@
expression E;
@@
- page_cache_get(E)
+ get_page(E)
@@
expression E;
@@
- page_cache_release(E)
+ put_page(E)
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Acked-by: Michal Hocko <mhocko@suse.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-04-01 15:29:47 +03:00
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2012-12-20 00:07:18 -05:00
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2014-11-25 20:19:17 -05:00
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2006-10-11 01:20:50 -07:00
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2012-03-03 23:20:50 -05:00
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fs: create and use seq_show_option for escaping
Many file systems that implement the show_options hook fail to correctly
escape their output which could lead to unescaped characters (e.g. new
lines) leaking into /proc/mounts and /proc/[pid]/mountinfo files. This
could lead to confusion, spoofed entries (resulting in things like
systemd issuing false d-bus "mount" notifications), and who knows what
else. This looks like it would only be the root user stepping on
themselves, but it's possible weird things could happen in containers or
in other situations with delegated mount privileges.
Here's an example using overlay with setuid fusermount trusting the
contents of /proc/mounts (via the /etc/mtab symlink). Imagine the use
of "sudo" is something more sneaky:
$ BASE="ovl"
$ MNT="$BASE/mnt"
$ LOW="$BASE/lower"
$ UP="$BASE/upper"
$ WORK="$BASE/work/ 0 0
none /proc fuse.pwn user_id=1000"
$ mkdir -p "$LOW" "$UP" "$WORK"
$ sudo mount -t overlay -o "lowerdir=$LOW,upperdir=$UP,workdir=$WORK" none /mnt
$ cat /proc/mounts
none /root/ovl/mnt overlay rw,relatime,lowerdir=ovl/lower,upperdir=ovl/upper,workdir=ovl/work/ 0 0
none /proc fuse.pwn user_id=1000 0 0
$ fusermount -u /proc
$ cat /proc/mounts
cat: /proc/mounts: No such file or directory
This fixes the problem by adding new seq_show_option and
seq_show_option_n helpers, and updating the vulnerable show_option
handlers to use them as needed. Some, like SELinux, need to be open
coded due to unusual existing escape mechanisms.
[akpm@linux-foundation.org: add lost chunk, per Kees]
[keescook@chromium.org: seq_show_option should be using const parameters]
Signed-off-by: Kees Cook <keescook@chromium.org>
Acked-by: Serge Hallyn <serge.hallyn@canonical.com>
Acked-by: Jan Kara <jack@suse.com>
Acked-by: Paul Moore <paul@paul-moore.com>
Cc: J. R. Okajima <hooanon05g@gmail.com>
Signed-off-by: Kees Cook <keescook@chromium.org>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2015-09-04 15:44:57 -07:00
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2012-03-03 23:20:50 -05:00
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fs: create and use seq_show_option for escaping
Many file systems that implement the show_options hook fail to correctly
escape their output which could lead to unescaped characters (e.g. new
lines) leaking into /proc/mounts and /proc/[pid]/mountinfo files. This
could lead to confusion, spoofed entries (resulting in things like
systemd issuing false d-bus "mount" notifications), and who knows what
else. This looks like it would only be the root user stepping on
themselves, but it's possible weird things could happen in containers or
in other situations with delegated mount privileges.
Here's an example using overlay with setuid fusermount trusting the
contents of /proc/mounts (via the /etc/mtab symlink). Imagine the use
of "sudo" is something more sneaky:
$ BASE="ovl"
$ MNT="$BASE/mnt"
$ LOW="$BASE/lower"
$ UP="$BASE/upper"
$ WORK="$BASE/work/ 0 0
none /proc fuse.pwn user_id=1000"
$ mkdir -p "$LOW" "$UP" "$WORK"
$ sudo mount -t overlay -o "lowerdir=$LOW,upperdir=$UP,workdir=$WORK" none /mnt
$ cat /proc/mounts
none /root/ovl/mnt overlay rw,relatime,lowerdir=ovl/lower,upperdir=ovl/upper,workdir=ovl/work/ 0 0
none /proc fuse.pwn user_id=1000 0 0
$ fusermount -u /proc
$ cat /proc/mounts
cat: /proc/mounts: No such file or directory
This fixes the problem by adding new seq_show_option and
seq_show_option_n helpers, and updating the vulnerable show_option
handlers to use them as needed. Some, like SELinux, need to be open
coded due to unusual existing escape mechanisms.
[akpm@linux-foundation.org: add lost chunk, per Kees]
[keescook@chromium.org: seq_show_option should be using const parameters]
Signed-off-by: Kees Cook <keescook@chromium.org>
Acked-by: Serge Hallyn <serge.hallyn@canonical.com>
Acked-by: Jan Kara <jack@suse.com>
Acked-by: Paul Moore <paul@paul-moore.com>
Cc: J. R. Okajima <hooanon05g@gmail.com>
Signed-off-by: Kees Cook <keescook@chromium.org>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2015-09-04 15:44:57 -07:00
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2012-03-03 23:20:50 -05:00
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2012-03-04 19:27:31 -05:00
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2012-09-23 22:49:12 -04:00
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2012-03-04 19:27:31 -05:00
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2012-03-03 23:20:50 -05:00
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2012-03-04 20:21:38 -05:00
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2012-03-03 23:20:50 -05:00
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2012-03-04 20:21:38 -05:00
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2012-03-04 19:27:31 -05:00
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2012-03-04 20:21:38 -05:00
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2012-03-03 23:20:50 -05:00
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2012-03-04 20:21:38 -05:00
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2012-03-03 23:20:50 -05:00
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2012-03-04 19:27:31 -05:00
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2012-03-04 20:21:38 -05:00
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2012-03-04 19:27:31 -05:00
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2012-03-03 23:20:50 -05:00
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2012-03-04 19:27:31 -05:00
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2012-02-07 15:41:49 -08:00
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2012-03-04 19:27:31 -05:00
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2012-02-07 15:41:49 -08:00
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2012-03-04 19:27:31 -05:00
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2012-02-07 15:41:49 -08:00
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2012-03-04 20:21:38 -05:00
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2012-03-04 19:27:31 -05:00
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2012-03-03 23:20:50 -05:00
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2012-03-04 19:27:31 -05:00
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2012-03-03 23:20:50 -05:00
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2012-03-04 19:27:31 -05:00
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2012-03-04 20:21:38 -05:00
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2012-03-04 19:27:31 -05:00
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2012-03-04 20:21:38 -05:00
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2012-03-04 19:27:31 -05:00
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2012-03-04 20:21:38 -05:00
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2012-03-04 19:27:31 -05:00
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2012-03-03 23:20:50 -05:00
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2012-03-04 19:27:31 -05:00
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2012-03-04 20:21:38 -05:00
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2012-03-04 19:27:31 -05:00
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2012-03-04 20:21:38 -05:00
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2012-03-04 19:27:31 -05:00
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2012-03-04 20:21:38 -05:00
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2012-03-04 19:27:31 -05:00
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2012-03-03 23:20:50 -05:00
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2012-03-04 20:21:38 -05:00
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2012-03-04 19:27:31 -05:00
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2012-08-17 09:48:17 -04:00
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2016-03-12 21:55:50 -05:00
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2012-03-03 23:20:50 -05:00
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2012-03-04 20:21:38 -05:00
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2015-09-23 12:46:17 -04:00
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2012-03-04 20:21:38 -05:00
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2006-10-11 01:20:53 -07:00
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2006-10-11 01:20:50 -07:00
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2006-10-11 01:20:53 -07:00
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2006-10-11 01:20:50 -07:00
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2006-10-11 01:20:53 -07:00
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2009-06-04 17:36:36 -04:00
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2006-10-11 01:20:50 -07:00
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2011-09-09 18:34:51 -04:00
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2006-10-11 01:20:53 -07:00
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2009-06-04 17:36:36 -04:00
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2014-05-12 12:55:07 -04:00
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2009-06-04 17:36:36 -04:00
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2011-05-18 13:29:57 -04:00
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2006-10-11 01:20:50 -07:00
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2009-06-04 17:36:36 -04:00
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2006-10-11 01:20:50 -07:00
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2009-06-04 17:36:36 -04:00
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2009-06-03 17:59:28 -04:00
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2009-01-07 00:06:22 -05:00
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2006-10-11 01:20:50 -07:00
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2006-10-11 01:20:53 -07:00
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2008-04-17 10:38:59 -04:00
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2006-10-11 01:20:50 -07:00
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2006-10-11 01:20:53 -07:00
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2009-01-07 00:06:22 -05:00
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2015-10-17 16:18:43 -04:00
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2006-10-11 01:20:50 -07:00
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2009-05-01 00:33:44 -04:00
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2011-09-09 18:34:51 -04:00
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2006-10-11 01:20:50 -07:00
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2009-01-05 22:18:16 -05:00
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2010-12-15 20:30:48 -05:00
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2006-10-11 01:20:50 -07:00
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2006-10-11 01:20:53 -07:00
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2010-12-15 20:30:48 -05:00
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2006-10-11 01:20:50 -07:00
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2011-05-26 10:02:03 -06:00
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2006-10-11 01:20:50 -07:00
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2012-09-05 01:29:50 -04:00
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2014-11-20 12:19:11 -05:00
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2012-09-05 01:29:50 -04:00
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2008-07-11 19:27:31 -04:00
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2012-09-05 01:29:50 -04:00
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2008-07-11 19:27:31 -04:00
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2009-11-23 07:24:46 -05:00
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ext4: fix undefined behavior in ext4_fill_flex_info()
Commit 503358ae01b70ce6909d19dd01287093f6b6271c ("ext4: avoid divide by
zero when trying to mount a corrupted file system") fixes CVE-2009-4307
by performing a sanity check on s_log_groups_per_flex, since it can be
set to a bogus value by an attacker.
sbi->s_log_groups_per_flex = sbi->s_es->s_log_groups_per_flex;
groups_per_flex = 1 << sbi->s_log_groups_per_flex;
if (groups_per_flex < 2) { ... }
This patch fixes two potential issues in the previous commit.
1) The sanity check might only work on architectures like PowerPC.
On x86, 5 bits are used for the shifting amount. That means, given a
large s_log_groups_per_flex value like 36, groups_per_flex = 1 << 36
is essentially 1 << 4 = 16, rather than 0. This will bypass the check,
leaving s_log_groups_per_flex and groups_per_flex inconsistent.
2) The sanity check relies on undefined behavior, i.e., oversized shift.
A standard-confirming C compiler could rewrite the check in unexpected
ways. Consider the following equivalent form, assuming groups_per_flex
is unsigned for simplicity.
groups_per_flex = 1 << sbi->s_log_groups_per_flex;
if (groups_per_flex == 0 || groups_per_flex == 1) {
We compile the code snippet using Clang 3.0 and GCC 4.6. Clang will
completely optimize away the check groups_per_flex == 0, leaving the
patched code as vulnerable as the original. GCC keeps the check, but
there is no guarantee that future versions will do the same.
Signed-off-by: Xi Wang <xi.wang@gmail.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Cc: stable@vger.kernel.org
2012-01-10 11:51:10 -05:00
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2008-07-11 19:27:31 -04:00
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2012-09-05 01:29:50 -04:00
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2011-08-01 08:45:02 -04:00
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2008-07-11 19:27:31 -04:00
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2009-05-25 11:50:39 -04:00
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2008-07-11 19:27:31 -04:00
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2009-09-11 16:51:28 -04:00
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2013-03-11 23:39:59 -04:00
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2009-09-11 16:51:28 -04:00
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2008-07-11 19:27:31 -04:00
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2015-10-17 16:18:43 -04:00
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2012-04-29 18:45:10 -04:00
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Ext4: Uninitialized Block Groups
In pass1 of e2fsck, every inode table in the fileystem is scanned and checked,
regardless of whether it is in use. This is this the most time consuming part
of the filesystem check. The unintialized block group feature can greatly
reduce e2fsck time by eliminating checking of uninitialized inodes.
With this feature, there is a a high water mark of used inodes for each block
group. Block and inode bitmaps can be uninitialized on disk via a flag in the
group descriptor to avoid reading or scanning them at e2fsck time. A checksum
of each group descriptor is used to ensure that corruption in the group
descriptor's bit flags does not cause incorrect operation.
The feature is enabled through a mkfs option
mke2fs /dev/ -O uninit_groups
A patch adding support for uninitialized block groups to e2fsprogs tools has
been posted to the linux-ext4 mailing list.
The patches have been stress tested with fsstress and fsx. In performance
tests testing e2fsck time, we have seen that e2fsck time on ext3 grows
linearly with the total number of inodes in the filesytem. In ext4 with the
uninitialized block groups feature, the e2fsck time is constant, based
solely on the number of used inodes rather than the total inode count.
Since typical ext4 filesystems only use 1-10% of their inodes, this feature can
greatly reduce e2fsck time for users. With performance improvement of 2-20
times, depending on how full the filesystem is.
The attached graph shows the major improvements in e2fsck times in filesystems
with a large total inode count, but few inodes in use.
In each group descriptor if we have
EXT4_BG_INODE_UNINIT set in bg_flags:
Inode table is not initialized/used in this group. So we can skip
the consistency check during fsck.
EXT4_BG_BLOCK_UNINIT set in bg_flags:
No block in the group is used. So we can skip the block bitmap
verification for this group.
We also add two new fields to group descriptor as a part of
uninitialized group patch.
__le16 bg_itable_unused; /* Unused inodes count */
__le16 bg_checksum; /* crc16(sb_uuid+group+desc) */
bg_itable_unused:
If we have EXT4_BG_INODE_UNINIT not set in bg_flags
then bg_itable_unused will give the offset within
the inode table till the inodes are used. This can be
used by fsck to skip list of inodes that are marked unused.
bg_checksum:
Now that we depend on bg_flags and bg_itable_unused to determine
the block and inode usage, we need to make sure group descriptor
is not corrupt. We add checksum to group descriptor to
detect corruption. If the descriptor is found to be corrupt, we
mark all the blocks and inodes in the group used.
Signed-off-by: Avantika Mathur <mathur@us.ibm.com>
Signed-off-by: Andreas Dilger <adilger@clusterfs.com>
Signed-off-by: Mingming Cao <cmm@us.ibm.com>
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
2007-10-16 18:38:25 -04:00
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2016-07-03 17:51:39 -04:00
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Ext4: Uninitialized Block Groups
In pass1 of e2fsck, every inode table in the fileystem is scanned and checked,
regardless of whether it is in use. This is this the most time consuming part
of the filesystem check. The unintialized block group feature can greatly
reduce e2fsck time by eliminating checking of uninitialized inodes.
With this feature, there is a a high water mark of used inodes for each block
group. Block and inode bitmaps can be uninitialized on disk via a flag in the
group descriptor to avoid reading or scanning them at e2fsck time. A checksum
of each group descriptor is used to ensure that corruption in the group
descriptor's bit flags does not cause incorrect operation.
The feature is enabled through a mkfs option
mke2fs /dev/ -O uninit_groups
A patch adding support for uninitialized block groups to e2fsprogs tools has
been posted to the linux-ext4 mailing list.
The patches have been stress tested with fsstress and fsx. In performance
tests testing e2fsck time, we have seen that e2fsck time on ext3 grows
linearly with the total number of inodes in the filesytem. In ext4 with the
uninitialized block groups feature, the e2fsck time is constant, based
solely on the number of used inodes rather than the total inode count.
Since typical ext4 filesystems only use 1-10% of their inodes, this feature can
greatly reduce e2fsck time for users. With performance improvement of 2-20
times, depending on how full the filesystem is.
The attached graph shows the major improvements in e2fsck times in filesystems
with a large total inode count, but few inodes in use.
In each group descriptor if we have
EXT4_BG_INODE_UNINIT set in bg_flags:
Inode table is not initialized/used in this group. So we can skip
the consistency check during fsck.
EXT4_BG_BLOCK_UNINIT set in bg_flags:
No block in the group is used. So we can skip the block bitmap
verification for this group.
We also add two new fields to group descriptor as a part of
uninitialized group patch.
__le16 bg_itable_unused; /* Unused inodes count */
__le16 bg_checksum; /* crc16(sb_uuid+group+desc) */
bg_itable_unused:
If we have EXT4_BG_INODE_UNINIT not set in bg_flags
then bg_itable_unused will give the offset within
the inode table till the inodes are used. This can be
used by fsck to skip list of inodes that are marked unused.
bg_checksum:
Now that we depend on bg_flags and bg_itable_unused to determine
the block and inode usage, we need to make sure group descriptor
is not corrupt. We add checksum to group descriptor to
detect corruption. If the descriptor is found to be corrupt, we
mark all the blocks and inodes in the group used.
Signed-off-by: Avantika Mathur <mathur@us.ibm.com>
Signed-off-by: Andreas Dilger <adilger@clusterfs.com>
Signed-off-by: Mingming Cao <cmm@us.ibm.com>
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
2007-10-16 18:38:25 -04:00
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2012-04-29 18:45:10 -04:00
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2015-10-17 16:18:43 -04:00
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|
Ext4: Uninitialized Block Groups
In pass1 of e2fsck, every inode table in the fileystem is scanned and checked,
regardless of whether it is in use. This is this the most time consuming part
of the filesystem check. The unintialized block group feature can greatly
reduce e2fsck time by eliminating checking of uninitialized inodes.
With this feature, there is a a high water mark of used inodes for each block
group. Block and inode bitmaps can be uninitialized on disk via a flag in the
group descriptor to avoid reading or scanning them at e2fsck time. A checksum
of each group descriptor is used to ensure that corruption in the group
descriptor's bit flags does not cause incorrect operation.
The feature is enabled through a mkfs option
mke2fs /dev/ -O uninit_groups
A patch adding support for uninitialized block groups to e2fsprogs tools has
been posted to the linux-ext4 mailing list.
The patches have been stress tested with fsstress and fsx. In performance
tests testing e2fsck time, we have seen that e2fsck time on ext3 grows
linearly with the total number of inodes in the filesytem. In ext4 with the
uninitialized block groups feature, the e2fsck time is constant, based
solely on the number of used inodes rather than the total inode count.
Since typical ext4 filesystems only use 1-10% of their inodes, this feature can
greatly reduce e2fsck time for users. With performance improvement of 2-20
times, depending on how full the filesystem is.
The attached graph shows the major improvements in e2fsck times in filesystems
with a large total inode count, but few inodes in use.
In each group descriptor if we have
EXT4_BG_INODE_UNINIT set in bg_flags:
Inode table is not initialized/used in this group. So we can skip
the consistency check during fsck.
EXT4_BG_BLOCK_UNINIT set in bg_flags:
No block in the group is used. So we can skip the block bitmap
verification for this group.
We also add two new fields to group descriptor as a part of
uninitialized group patch.
__le16 bg_itable_unused; /* Unused inodes count */
__le16 bg_checksum; /* crc16(sb_uuid+group+desc) */
bg_itable_unused:
If we have EXT4_BG_INODE_UNINIT not set in bg_flags
then bg_itable_unused will give the offset within
the inode table till the inodes are used. This can be
used by fsck to skip list of inodes that are marked unused.
bg_checksum:
Now that we depend on bg_flags and bg_itable_unused to determine
the block and inode usage, we need to make sure group descriptor
is not corrupt. We add checksum to group descriptor to
detect corruption. If the descriptor is found to be corrupt, we
mark all the blocks and inodes in the group used.
Signed-off-by: Avantika Mathur <mathur@us.ibm.com>
Signed-off-by: Andreas Dilger <adilger@clusterfs.com>
Signed-off-by: Mingming Cao <cmm@us.ibm.com>
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
2007-10-16 18:38:25 -04:00
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2014-10-13 03:36:16 -04:00
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2012-04-29 18:45:10 -04:00
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2016-07-03 17:51:39 -04:00
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2012-04-29 18:45:10 -04:00
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2016-07-03 17:51:39 -04:00
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2012-04-29 18:45:10 -04:00
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Ext4: Uninitialized Block Groups
In pass1 of e2fsck, every inode table in the fileystem is scanned and checked,
regardless of whether it is in use. This is this the most time consuming part
of the filesystem check. The unintialized block group feature can greatly
reduce e2fsck time by eliminating checking of uninitialized inodes.
With this feature, there is a a high water mark of used inodes for each block
group. Block and inode bitmaps can be uninitialized on disk via a flag in the
group descriptor to avoid reading or scanning them at e2fsck time. A checksum
of each group descriptor is used to ensure that corruption in the group
descriptor's bit flags does not cause incorrect operation.
The feature is enabled through a mkfs option
mke2fs /dev/ -O uninit_groups
A patch adding support for uninitialized block groups to e2fsprogs tools has
been posted to the linux-ext4 mailing list.
The patches have been stress tested with fsstress and fsx. In performance
tests testing e2fsck time, we have seen that e2fsck time on ext3 grows
linearly with the total number of inodes in the filesytem. In ext4 with the
uninitialized block groups feature, the e2fsck time is constant, based
solely on the number of used inodes rather than the total inode count.
Since typical ext4 filesystems only use 1-10% of their inodes, this feature can
greatly reduce e2fsck time for users. With performance improvement of 2-20
times, depending on how full the filesystem is.
The attached graph shows the major improvements in e2fsck times in filesystems
with a large total inode count, but few inodes in use.
In each group descriptor if we have
EXT4_BG_INODE_UNINIT set in bg_flags:
Inode table is not initialized/used in this group. So we can skip
the consistency check during fsck.
EXT4_BG_BLOCK_UNINIT set in bg_flags:
No block in the group is used. So we can skip the block bitmap
verification for this group.
We also add two new fields to group descriptor as a part of
uninitialized group patch.
__le16 bg_itable_unused; /* Unused inodes count */
__le16 bg_checksum; /* crc16(sb_uuid+group+desc) */
bg_itable_unused:
If we have EXT4_BG_INODE_UNINIT not set in bg_flags
then bg_itable_unused will give the offset within
the inode table till the inodes are used. This can be
used by fsck to skip list of inodes that are marked unused.
bg_checksum:
Now that we depend on bg_flags and bg_itable_unused to determine
the block and inode usage, we need to make sure group descriptor
is not corrupt. We add checksum to group descriptor to
detect corruption. If the descriptor is found to be corrupt, we
mark all the blocks and inodes in the group used.
Signed-off-by: Avantika Mathur <mathur@us.ibm.com>
Signed-off-by: Andreas Dilger <adilger@clusterfs.com>
Signed-off-by: Mingming Cao <cmm@us.ibm.com>
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
2007-10-16 18:38:25 -04:00
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2012-04-29 18:45:10 -04:00
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2015-10-17 16:18:43 -04:00
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2014-10-14 02:35:49 -04:00
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2012-04-29 18:45:10 -04:00
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2015-10-17 16:18:43 -04:00
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2012-04-29 18:45:10 -04:00
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Ext4: Uninitialized Block Groups
In pass1 of e2fsck, every inode table in the fileystem is scanned and checked,
regardless of whether it is in use. This is this the most time consuming part
of the filesystem check. The unintialized block group feature can greatly
reduce e2fsck time by eliminating checking of uninitialized inodes.
With this feature, there is a a high water mark of used inodes for each block
group. Block and inode bitmaps can be uninitialized on disk via a flag in the
group descriptor to avoid reading or scanning them at e2fsck time. A checksum
of each group descriptor is used to ensure that corruption in the group
descriptor's bit flags does not cause incorrect operation.
The feature is enabled through a mkfs option
mke2fs /dev/ -O uninit_groups
A patch adding support for uninitialized block groups to e2fsprogs tools has
been posted to the linux-ext4 mailing list.
The patches have been stress tested with fsstress and fsx. In performance
tests testing e2fsck time, we have seen that e2fsck time on ext3 grows
linearly with the total number of inodes in the filesytem. In ext4 with the
uninitialized block groups feature, the e2fsck time is constant, based
solely on the number of used inodes rather than the total inode count.
Since typical ext4 filesystems only use 1-10% of their inodes, this feature can
greatly reduce e2fsck time for users. With performance improvement of 2-20
times, depending on how full the filesystem is.
The attached graph shows the major improvements in e2fsck times in filesystems
with a large total inode count, but few inodes in use.
In each group descriptor if we have
EXT4_BG_INODE_UNINIT set in bg_flags:
Inode table is not initialized/used in this group. So we can skip
the consistency check during fsck.
EXT4_BG_BLOCK_UNINIT set in bg_flags:
No block in the group is used. So we can skip the block bitmap
verification for this group.
We also add two new fields to group descriptor as a part of
uninitialized group patch.
__le16 bg_itable_unused; /* Unused inodes count */
__le16 bg_checksum; /* crc16(sb_uuid+group+desc) */
bg_itable_unused:
If we have EXT4_BG_INODE_UNINIT not set in bg_flags
then bg_itable_unused will give the offset within
the inode table till the inodes are used. This can be
used by fsck to skip list of inodes that are marked unused.
bg_checksum:
Now that we depend on bg_flags and bg_itable_unused to determine
the block and inode usage, we need to make sure group descriptor
is not corrupt. We add checksum to group descriptor to
detect corruption. If the descriptor is found to be corrupt, we
mark all the blocks and inodes in the group used.
Signed-off-by: Avantika Mathur <mathur@us.ibm.com>
Signed-off-by: Andreas Dilger <adilger@clusterfs.com>
Signed-off-by: Mingming Cao <cmm@us.ibm.com>
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
2007-10-16 18:38:25 -04:00
|
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|
|
|
|
|
|
|
|
|
2012-04-29 18:45:10 -04:00
|
|
|
|
Ext4: Uninitialized Block Groups
In pass1 of e2fsck, every inode table in the fileystem is scanned and checked,
regardless of whether it is in use. This is this the most time consuming part
of the filesystem check. The unintialized block group feature can greatly
reduce e2fsck time by eliminating checking of uninitialized inodes.
With this feature, there is a a high water mark of used inodes for each block
group. Block and inode bitmaps can be uninitialized on disk via a flag in the
group descriptor to avoid reading or scanning them at e2fsck time. A checksum
of each group descriptor is used to ensure that corruption in the group
descriptor's bit flags does not cause incorrect operation.
The feature is enabled through a mkfs option
mke2fs /dev/ -O uninit_groups
A patch adding support for uninitialized block groups to e2fsprogs tools has
been posted to the linux-ext4 mailing list.
The patches have been stress tested with fsstress and fsx. In performance
tests testing e2fsck time, we have seen that e2fsck time on ext3 grows
linearly with the total number of inodes in the filesytem. In ext4 with the
uninitialized block groups feature, the e2fsck time is constant, based
solely on the number of used inodes rather than the total inode count.
Since typical ext4 filesystems only use 1-10% of their inodes, this feature can
greatly reduce e2fsck time for users. With performance improvement of 2-20
times, depending on how full the filesystem is.
The attached graph shows the major improvements in e2fsck times in filesystems
with a large total inode count, but few inodes in use.
In each group descriptor if we have
EXT4_BG_INODE_UNINIT set in bg_flags:
Inode table is not initialized/used in this group. So we can skip
the consistency check during fsck.
EXT4_BG_BLOCK_UNINIT set in bg_flags:
No block in the group is used. So we can skip the block bitmap
verification for this group.
We also add two new fields to group descriptor as a part of
uninitialized group patch.
__le16 bg_itable_unused; /* Unused inodes count */
__le16 bg_checksum; /* crc16(sb_uuid+group+desc) */
bg_itable_unused:
If we have EXT4_BG_INODE_UNINIT not set in bg_flags
then bg_itable_unused will give the offset within
the inode table till the inodes are used. This can be
used by fsck to skip list of inodes that are marked unused.
bg_checksum:
Now that we depend on bg_flags and bg_itable_unused to determine
the block and inode usage, we need to make sure group descriptor
is not corrupt. We add checksum to group descriptor to
detect corruption. If the descriptor is found to be corrupt, we
mark all the blocks and inodes in the group used.
Signed-off-by: Avantika Mathur <mathur@us.ibm.com>
Signed-off-by: Andreas Dilger <adilger@clusterfs.com>
Signed-off-by: Mingming Cao <cmm@us.ibm.com>
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
2007-10-16 18:38:25 -04:00
|
|
|
|
|
|
|
|
|
2012-04-29 18:45:10 -04:00
|
|
|
|
2015-10-17 16:18:43 -04:00
|
|
|
|
Ext4: Uninitialized Block Groups
In pass1 of e2fsck, every inode table in the fileystem is scanned and checked,
regardless of whether it is in use. This is this the most time consuming part
of the filesystem check. The unintialized block group feature can greatly
reduce e2fsck time by eliminating checking of uninitialized inodes.
With this feature, there is a a high water mark of used inodes for each block
group. Block and inode bitmaps can be uninitialized on disk via a flag in the
group descriptor to avoid reading or scanning them at e2fsck time. A checksum
of each group descriptor is used to ensure that corruption in the group
descriptor's bit flags does not cause incorrect operation.
The feature is enabled through a mkfs option
mke2fs /dev/ -O uninit_groups
A patch adding support for uninitialized block groups to e2fsprogs tools has
been posted to the linux-ext4 mailing list.
The patches have been stress tested with fsstress and fsx. In performance
tests testing e2fsck time, we have seen that e2fsck time on ext3 grows
linearly with the total number of inodes in the filesytem. In ext4 with the
uninitialized block groups feature, the e2fsck time is constant, based
solely on the number of used inodes rather than the total inode count.
Since typical ext4 filesystems only use 1-10% of their inodes, this feature can
greatly reduce e2fsck time for users. With performance improvement of 2-20
times, depending on how full the filesystem is.
The attached graph shows the major improvements in e2fsck times in filesystems
with a large total inode count, but few inodes in use.
In each group descriptor if we have
EXT4_BG_INODE_UNINIT set in bg_flags:
Inode table is not initialized/used in this group. So we can skip
the consistency check during fsck.
EXT4_BG_BLOCK_UNINIT set in bg_flags:
No block in the group is used. So we can skip the block bitmap
verification for this group.
We also add two new fields to group descriptor as a part of
uninitialized group patch.
__le16 bg_itable_unused; /* Unused inodes count */
__le16 bg_checksum; /* crc16(sb_uuid+group+desc) */
bg_itable_unused:
If we have EXT4_BG_INODE_UNINIT not set in bg_flags
then bg_itable_unused will give the offset within
the inode table till the inodes are used. This can be
used by fsck to skip list of inodes that are marked unused.
bg_checksum:
Now that we depend on bg_flags and bg_itable_unused to determine
the block and inode usage, we need to make sure group descriptor
is not corrupt. We add checksum to group descriptor to
detect corruption. If the descriptor is found to be corrupt, we
mark all the blocks and inodes in the group used.
Signed-off-by: Avantika Mathur <mathur@us.ibm.com>
Signed-off-by: Andreas Dilger <adilger@clusterfs.com>
Signed-off-by: Mingming Cao <cmm@us.ibm.com>
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
2007-10-16 18:38:25 -04:00
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|
2012-04-29 18:45:10 -04:00
|
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|
2015-10-17 16:18:43 -04:00
|
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|
|
2012-04-29 18:45:10 -04:00
|
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|
2006-10-11 01:20:50 -07:00
|
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|
ext4: add support for lazy inode table initialization
When the lazy_itable_init extended option is passed to mke2fs, it
considerably speeds up filesystem creation because inode tables are
not zeroed out. The fact that parts of the inode table are
uninitialized is not a problem so long as the block group descriptors,
which contain information regarding how much of the inode table has
been initialized, has not been corrupted However, if the block group
checksums are not valid, e2fsck must scan the entire inode table, and
the the old, uninitialized data could potentially cause e2fsck to
report false problems.
Hence, it is important for the inode tables to be initialized as soon
as possble. This commit adds this feature so that mke2fs can safely
use the lazy inode table initialization feature to speed up formatting
file systems.
This is done via a new new kernel thread called ext4lazyinit, which is
created on demand and destroyed, when it is no longer needed. There
is only one thread for all ext4 filesystems in the system. When the
first filesystem with inititable mount option is mounted, ext4lazyinit
thread is created, then the filesystem can register its request in the
request list.
This thread then walks through the list of requests picking up
scheduled requests and invoking ext4_init_inode_table(). Next schedule
time for the request is computed by multiplying the time it took to
zero out last inode table with wait multiplier, which can be set with
the (init_itable=n) mount option (default is 10). We are doing
this so we do not take the whole I/O bandwidth. When the thread is no
longer necessary (request list is empty) it frees the appropriate
structures and exits (and can be created later later by another
filesystem).
We do not disturb regular inode allocations in any way, it just do not
care whether the inode table is, or is not zeroed. But when zeroing, we
have to skip used inodes, obviously. Also we should prevent new inode
allocations from the group, while zeroing is on the way. For that we
take write alloc_sem lock in ext4_init_inode_table() and read alloc_sem
in the ext4_claim_inode, so when we are unlucky and allocator hits the
group which is currently being zeroed, it just has to wait.
This can be suppresed using the mount option no_init_itable.
Signed-off-by: Lukas Czerner <lczerner@redhat.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2010-10-27 21:30:05 -04:00
|
|
|
|
2016-08-01 00:51:02 -04:00
|
|
|
|
ext4: add support for lazy inode table initialization
When the lazy_itable_init extended option is passed to mke2fs, it
considerably speeds up filesystem creation because inode tables are
not zeroed out. The fact that parts of the inode table are
uninitialized is not a problem so long as the block group descriptors,
which contain information regarding how much of the inode table has
been initialized, has not been corrupted However, if the block group
checksums are not valid, e2fsck must scan the entire inode table, and
the the old, uninitialized data could potentially cause e2fsck to
report false problems.
Hence, it is important for the inode tables to be initialized as soon
as possble. This commit adds this feature so that mke2fs can safely
use the lazy inode table initialization feature to speed up formatting
file systems.
This is done via a new new kernel thread called ext4lazyinit, which is
created on demand and destroyed, when it is no longer needed. There
is only one thread for all ext4 filesystems in the system. When the
first filesystem with inititable mount option is mounted, ext4lazyinit
thread is created, then the filesystem can register its request in the
request list.
This thread then walks through the list of requests picking up
scheduled requests and invoking ext4_init_inode_table(). Next schedule
time for the request is computed by multiplying the time it took to
zero out last inode table with wait multiplier, which can be set with
the (init_itable=n) mount option (default is 10). We are doing
this so we do not take the whole I/O bandwidth. When the thread is no
longer necessary (request list is empty) it frees the appropriate
structures and exits (and can be created later later by another
filesystem).
We do not disturb regular inode allocations in any way, it just do not
care whether the inode table is, or is not zeroed. But when zeroing, we
have to skip used inodes, obviously. Also we should prevent new inode
allocations from the group, while zeroing is on the way. For that we
take write alloc_sem lock in ext4_init_inode_table() and read alloc_sem
in the ext4_claim_inode, so when we are unlucky and allocator hits the
group which is currently being zeroed, it just has to wait.
This can be suppresed using the mount option no_init_itable.
Signed-off-by: Lukas Czerner <lczerner@redhat.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2010-10-27 21:30:05 -04:00
|
|
|
|
2006-10-11 01:20:50 -07:00
|
|
|
|
2006-10-11 01:20:53 -07:00
|
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|
|
|
|
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|
2006-10-11 01:21:10 -07:00
|
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|
|
2007-10-16 18:38:25 -04:00
|
|
|
|
ext4: add support for lazy inode table initialization
When the lazy_itable_init extended option is passed to mke2fs, it
considerably speeds up filesystem creation because inode tables are
not zeroed out. The fact that parts of the inode table are
uninitialized is not a problem so long as the block group descriptors,
which contain information regarding how much of the inode table has
been initialized, has not been corrupted However, if the block group
checksums are not valid, e2fsck must scan the entire inode table, and
the the old, uninitialized data could potentially cause e2fsck to
report false problems.
Hence, it is important for the inode tables to be initialized as soon
as possble. This commit adds this feature so that mke2fs can safely
use the lazy inode table initialization feature to speed up formatting
file systems.
This is done via a new new kernel thread called ext4lazyinit, which is
created on demand and destroyed, when it is no longer needed. There
is only one thread for all ext4 filesystems in the system. When the
first filesystem with inititable mount option is mounted, ext4lazyinit
thread is created, then the filesystem can register its request in the
request list.
This thread then walks through the list of requests picking up
scheduled requests and invoking ext4_init_inode_table(). Next schedule
time for the request is computed by multiplying the time it took to
zero out last inode table with wait multiplier, which can be set with
the (init_itable=n) mount option (default is 10). We are doing
this so we do not take the whole I/O bandwidth. When the thread is no
longer necessary (request list is empty) it frees the appropriate
structures and exits (and can be created later later by another
filesystem).
We do not disturb regular inode allocations in any way, it just do not
care whether the inode table is, or is not zeroed. But when zeroing, we
have to skip used inodes, obviously. Also we should prevent new inode
allocations from the group, while zeroing is on the way. For that we
take write alloc_sem lock in ext4_init_inode_table() and read alloc_sem
in the ext4_claim_inode, so when we are unlucky and allocator hits the
group which is currently being zeroed, it just has to wait.
This can be suppresed using the mount option no_init_itable.
Signed-off-by: Lukas Czerner <lczerner@redhat.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2010-10-27 21:30:05 -04:00
|
|
|
|
2006-10-11 01:20:50 -07:00
|
|
|
|
2015-10-17 16:18:43 -04:00
|
|
|
|
2007-10-16 18:38:25 -04:00
|
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|
|
|
2008-09-08 22:25:24 -04:00
|
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|
2006-10-11 01:20:50 -07:00
|
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|
|
2008-02-06 01:40:16 -08:00
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2007-10-16 18:38:25 -04:00
|
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2006-10-11 01:21:10 -07:00
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|
2006-10-11 01:20:50 -07:00
|
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2006-10-11 01:20:53 -07:00
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2006-10-11 01:20:50 -07:00
|
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ext4: add support for lazy inode table initialization
When the lazy_itable_init extended option is passed to mke2fs, it
considerably speeds up filesystem creation because inode tables are
not zeroed out. The fact that parts of the inode table are
uninitialized is not a problem so long as the block group descriptors,
which contain information regarding how much of the inode table has
been initialized, has not been corrupted However, if the block group
checksums are not valid, e2fsck must scan the entire inode table, and
the the old, uninitialized data could potentially cause e2fsck to
report false problems.
Hence, it is important for the inode tables to be initialized as soon
as possble. This commit adds this feature so that mke2fs can safely
use the lazy inode table initialization feature to speed up formatting
file systems.
This is done via a new new kernel thread called ext4lazyinit, which is
created on demand and destroyed, when it is no longer needed. There
is only one thread for all ext4 filesystems in the system. When the
first filesystem with inititable mount option is mounted, ext4lazyinit
thread is created, then the filesystem can register its request in the
request list.
This thread then walks through the list of requests picking up
scheduled requests and invoking ext4_init_inode_table(). Next schedule
time for the request is computed by multiplying the time it took to
zero out last inode table with wait multiplier, which can be set with
the (init_itable=n) mount option (default is 10). We are doing
this so we do not take the whole I/O bandwidth. When the thread is no
longer necessary (request list is empty) it frees the appropriate
structures and exits (and can be created later later by another
filesystem).
We do not disturb regular inode allocations in any way, it just do not
care whether the inode table is, or is not zeroed. But when zeroing, we
have to skip used inodes, obviously. Also we should prevent new inode
allocations from the group, while zeroing is on the way. For that we
take write alloc_sem lock in ext4_init_inode_table() and read alloc_sem
in the ext4_claim_inode, so when we are unlucky and allocator hits the
group which is currently being zeroed, it just has to wait.
This can be suppresed using the mount option no_init_itable.
Signed-off-by: Lukas Czerner <lczerner@redhat.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2010-10-27 21:30:05 -04:00
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2006-10-11 01:21:15 -07:00
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2016-08-01 00:51:02 -04:00
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2008-07-26 16:15:44 -04:00
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2009-06-04 17:36:36 -04:00
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2009-01-05 22:18:16 -05:00
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2009-06-04 17:36:36 -04:00
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2006-10-11 01:20:50 -07:00
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2006-10-11 01:21:15 -07:00
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2016-08-01 00:51:02 -04:00
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2008-07-26 16:15:44 -04:00
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2009-06-04 17:36:36 -04:00
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2009-01-05 22:18:16 -05:00
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2009-06-04 17:36:36 -04:00
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2006-10-11 01:20:50 -07:00
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2006-10-11 01:21:15 -07:00
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2016-08-01 00:51:02 -04:00
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2006-10-11 01:21:10 -07:00
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2008-07-26 16:15:44 -04:00
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2009-06-04 17:36:36 -04:00
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2009-01-05 22:18:16 -05:00
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2009-06-04 17:36:36 -04:00
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2006-10-11 01:20:50 -07:00
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2009-05-02 20:35:09 -04:00
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2012-04-29 18:45:10 -04:00
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2009-06-04 17:36:36 -04:00
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2015-10-17 16:18:43 -04:00
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2009-06-04 17:36:36 -04:00
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2008-09-08 10:47:19 -04:00
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2009-05-02 20:35:09 -04:00
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2008-07-26 14:34:21 -04:00
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2008-09-08 10:47:19 -04:00
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Ext4: Uninitialized Block Groups
In pass1 of e2fsck, every inode table in the fileystem is scanned and checked,
regardless of whether it is in use. This is this the most time consuming part
of the filesystem check. The unintialized block group feature can greatly
reduce e2fsck time by eliminating checking of uninitialized inodes.
With this feature, there is a a high water mark of used inodes for each block
group. Block and inode bitmaps can be uninitialized on disk via a flag in the
group descriptor to avoid reading or scanning them at e2fsck time. A checksum
of each group descriptor is used to ensure that corruption in the group
descriptor's bit flags does not cause incorrect operation.
The feature is enabled through a mkfs option
mke2fs /dev/ -O uninit_groups
A patch adding support for uninitialized block groups to e2fsprogs tools has
been posted to the linux-ext4 mailing list.
The patches have been stress tested with fsstress and fsx. In performance
tests testing e2fsck time, we have seen that e2fsck time on ext3 grows
linearly with the total number of inodes in the filesytem. In ext4 with the
uninitialized block groups feature, the e2fsck time is constant, based
solely on the number of used inodes rather than the total inode count.
Since typical ext4 filesystems only use 1-10% of their inodes, this feature can
greatly reduce e2fsck time for users. With performance improvement of 2-20
times, depending on how full the filesystem is.
The attached graph shows the major improvements in e2fsck times in filesystems
with a large total inode count, but few inodes in use.
In each group descriptor if we have
EXT4_BG_INODE_UNINIT set in bg_flags:
Inode table is not initialized/used in this group. So we can skip
the consistency check during fsck.
EXT4_BG_BLOCK_UNINIT set in bg_flags:
No block in the group is used. So we can skip the block bitmap
verification for this group.
We also add two new fields to group descriptor as a part of
uninitialized group patch.
__le16 bg_itable_unused; /* Unused inodes count */
__le16 bg_checksum; /* crc16(sb_uuid+group+desc) */
bg_itable_unused:
If we have EXT4_BG_INODE_UNINIT not set in bg_flags
then bg_itable_unused will give the offset within
the inode table till the inodes are used. This can be
used by fsck to skip list of inodes that are marked unused.
bg_checksum:
Now that we depend on bg_flags and bg_itable_unused to determine
the block and inode usage, we need to make sure group descriptor
is not corrupt. We add checksum to group descriptor to
detect corruption. If the descriptor is found to be corrupt, we
mark all the blocks and inodes in the group used.
Signed-off-by: Avantika Mathur <mathur@us.ibm.com>
Signed-off-by: Andreas Dilger <adilger@clusterfs.com>
Signed-off-by: Mingming Cao <cmm@us.ibm.com>
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
2007-10-16 18:38:25 -04:00
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2009-05-02 20:35:09 -04:00
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2007-10-16 18:38:25 -04:00
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2006-10-11 01:20:50 -07:00
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ext4: add support for lazy inode table initialization
When the lazy_itable_init extended option is passed to mke2fs, it
considerably speeds up filesystem creation because inode tables are
not zeroed out. The fact that parts of the inode table are
uninitialized is not a problem so long as the block group descriptors,
which contain information regarding how much of the inode table has
been initialized, has not been corrupted However, if the block group
checksums are not valid, e2fsck must scan the entire inode table, and
the the old, uninitialized data could potentially cause e2fsck to
report false problems.
Hence, it is important for the inode tables to be initialized as soon
as possble. This commit adds this feature so that mke2fs can safely
use the lazy inode table initialization feature to speed up formatting
file systems.
This is done via a new new kernel thread called ext4lazyinit, which is
created on demand and destroyed, when it is no longer needed. There
is only one thread for all ext4 filesystems in the system. When the
first filesystem with inititable mount option is mounted, ext4lazyinit
thread is created, then the filesystem can register its request in the
request list.
This thread then walks through the list of requests picking up
scheduled requests and invoking ext4_init_inode_table(). Next schedule
time for the request is computed by multiplying the time it took to
zero out last inode table with wait multiplier, which can be set with
the (init_itable=n) mount option (default is 10). We are doing
this so we do not take the whole I/O bandwidth. When the thread is no
longer necessary (request list is empty) it frees the appropriate
structures and exits (and can be created later later by another
filesystem).
We do not disturb regular inode allocations in any way, it just do not
care whether the inode table is, or is not zeroed. But when zeroing, we
have to skip used inodes, obviously. Also we should prevent new inode
allocations from the group, while zeroing is on the way. For that we
take write alloc_sem lock in ext4_init_inode_table() and read alloc_sem
in the ext4_claim_inode, so when we are unlucky and allocator hits the
group which is currently being zeroed, it just has to wait.
This can be suppresed using the mount option no_init_itable.
Signed-off-by: Lukas Czerner <lczerner@redhat.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2010-10-27 21:30:05 -04:00
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2006-10-11 01:20:50 -07:00
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2006-10-11 01:20:53 -07:00
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2006-10-11 01:20:50 -07:00
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2006-10-11 01:20:53 -07:00
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2006-10-11 01:20:50 -07:00
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2008-07-26 16:15:44 -04:00
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2006-10-11 01:20:50 -07:00
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2006-12-06 20:40:13 -08:00
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2009-06-04 17:36:36 -04:00
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2006-12-06 20:40:13 -08:00
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2011-02-28 00:53:45 -05:00
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2006-10-11 01:20:53 -07:00
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2012-09-26 23:30:12 -04:00
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2014-09-16 14:52:03 -04:00
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2006-10-11 01:20:50 -07:00
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2012-09-26 23:30:12 -04:00
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2006-10-11 01:20:50 -07:00
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2009-06-04 17:36:36 -04:00
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2006-10-11 01:20:50 -07:00
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2014-09-11 11:15:15 -04:00
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2006-10-11 01:20:53 -07:00
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2006-10-11 01:20:50 -07:00
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2009-06-04 17:36:36 -04:00
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2006-10-11 01:20:50 -07:00
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2016-07-14 23:21:35 -04:00
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2008-04-29 22:04:56 -04:00
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2006-10-11 01:20:50 -07:00
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2006-10-11 01:20:53 -07:00
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2010-03-03 09:05:07 -05:00
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2006-10-11 01:20:50 -07:00
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2013-05-28 07:51:21 -04:00
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2008-09-08 22:25:04 -04:00
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2006-10-11 01:20:50 -07:00
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2016-01-22 15:40:57 -05:00
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2013-05-27 23:32:35 -04:00
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2006-10-11 01:20:53 -07:00
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2016-01-22 15:40:57 -05:00
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2006-10-11 01:20:50 -07:00
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2013-05-28 07:51:21 -04:00
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2006-10-11 01:20:50 -07:00
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2008-07-26 16:15:44 -04:00
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2006-10-11 01:20:50 -07:00
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2009-06-04 17:36:36 -04:00
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2006-10-11 01:20:50 -07:00
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2009-06-04 17:36:36 -04:00
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2006-10-11 01:20:50 -07:00
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2014-09-11 11:15:15 -04:00
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2006-10-11 01:20:50 -07:00
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2010-05-19 07:16:45 -04:00
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2006-10-11 01:20:50 -07:00
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2009-06-03 17:59:28 -04:00
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2008-01-28 23:58:27 -05:00
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2011-06-06 00:05:17 -04:00
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2008-01-28 23:58:27 -05:00
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2008-10-16 22:50:48 -04:00
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2008-01-28 23:58:27 -05:00
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2008-10-16 22:50:48 -04:00
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2008-01-28 23:58:27 -05:00
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2009-06-19 08:08:50 +02:00
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2008-01-28 23:58:27 -05:00
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2011-06-06 00:05:17 -04:00
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2008-01-28 23:58:27 -05:00
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2006-10-11 01:20:50 -07:00
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2008-01-28 23:58:27 -05:00
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2008-01-28 23:58:26 -05:00
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2006-10-11 01:20:50 -07:00
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2008-10-16 22:50:48 -04:00
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2006-10-11 01:20:50 -07:00
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2006-10-11 01:20:53 -07:00
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2008-01-28 23:58:26 -05:00
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2009-06-03 17:59:28 -04:00
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2008-01-28 23:58:26 -05:00
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2008-10-16 22:50:48 -04:00
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2008-01-28 23:58:26 -05:00
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2009-06-19 08:08:50 +02:00
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2009-06-03 17:59:28 -04:00
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2008-01-28 23:58:26 -05:00
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2008-01-28 23:58:27 -05:00
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2008-01-28 23:58:26 -05:00
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2008-01-28 23:58:26 -05:00
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2006-10-11 01:20:50 -07:00
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2006-10-11 01:20:53 -07:00
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2009-06-03 17:59:28 -04:00
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2006-10-11 01:20:50 -07:00
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2006-10-11 01:20:53 -07:00
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2008-01-28 23:58:27 -05:00
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2006-10-11 01:20:50 -07:00
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2015-10-17 16:18:43 -04:00
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2006-10-11 01:21:20 -07:00
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2006-10-11 01:20:50 -07:00
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2006-10-11 01:20:53 -07:00
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2006-10-11 01:20:50 -07:00
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2009-06-03 17:59:28 -04:00
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2014-05-12 10:06:27 -04:00
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2006-10-11 01:20:53 -07:00
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2006-10-11 01:20:50 -07:00
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2008-01-29 00:19:52 -05:00
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2011-07-17 21:18:51 -04:00
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2008-01-29 00:19:52 -05:00
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2011-07-17 21:18:51 -04:00
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2008-01-29 00:19:52 -05:00
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2011-07-17 21:18:51 -04:00
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2008-01-29 00:19:52 -05:00
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2011-07-17 21:18:51 -04:00
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2008-01-29 00:19:52 -05:00
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2006-10-11 01:20:50 -07:00
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2009-08-18 00:20:23 -04:00
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2015-10-17 16:18:43 -04:00
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2009-08-18 00:20:23 -04:00
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2015-10-17 16:18:43 -04:00
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2015-02-12 22:31:21 -05:00
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2009-08-18 00:20:23 -04:00
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2015-10-17 16:18:43 -04:00
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2009-08-18 00:20:23 -04:00
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2015-10-17 16:18:43 -04:00
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2009-08-18 00:20:23 -04:00
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2015-10-17 16:18:43 -04:00
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2011-09-09 18:36:51 -04:00
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ext4: make quota as first class supported feature
This patch adds support for quotas as a first class feature in ext4;
which is to say, the quota files are stored in hidden inodes as file
system metadata, instead of as separate files visible in the file system
directory hierarchy.
It is based on the proposal at:
https://ext4.wiki.kernel.org/index.php/Design_For_1st_Class_Quota_in_Ext4
This patch introduces a new feature - EXT4_FEATURE_RO_COMPAT_QUOTA
which, when turned on, enables quota accounting at mount time
iteself. Also, the quota inodes are stored in two additional superblock
fields. Some changes introduced by this patch that should be pointed
out are:
1) Two new ext4-superblock fields - s_usr_quota_inum and
s_grp_quota_inum for storing the quota inodes in use.
2) Default quota inodes are: inode#3 for tracking userquota and inode#4
for tracking group quota. The superblock fields can be set to use
other inodes as well.
3) If the QUOTA feature and corresponding quota inodes are set in
superblock, the quota usage tracking is turned on at mount time. On
'quotaon' ioctl, the quota limits enforcement is turned
on. 'quotaoff' ioctl turns off only the limits enforcement in this
case.
4) When QUOTA feature is in use, the quota mount options 'quota',
'usrquota', 'grpquota' are ignored by the kernel.
5) mke2fs or tune2fs can be used to set the QUOTA feature and initialize
quota inodes. The default reserved inodes will not be visible to user
as regular files.
6) The quota-tools will need to be modified to support hidden quota
files on ext4. E2fsprogs will also include support for creating and
fixing quota files.
7) Support is only for the new V2 quota file format.
Tested-by: Jan Kara <jack@suse.cz>
Reviewed-by: Jan Kara <jack@suse.cz>
Reviewed-by: Johann Lombardi <johann@whamcloud.com>
Signed-off-by: Aditya Kali <adityakali@google.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2012-07-22 20:21:31 -04:00
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2015-10-17 16:18:43 -04:00
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|
ext4: make quota as first class supported feature
This patch adds support for quotas as a first class feature in ext4;
which is to say, the quota files are stored in hidden inodes as file
system metadata, instead of as separate files visible in the file system
directory hierarchy.
It is based on the proposal at:
https://ext4.wiki.kernel.org/index.php/Design_For_1st_Class_Quota_in_Ext4
This patch introduces a new feature - EXT4_FEATURE_RO_COMPAT_QUOTA
which, when turned on, enables quota accounting at mount time
iteself. Also, the quota inodes are stored in two additional superblock
fields. Some changes introduced by this patch that should be pointed
out are:
1) Two new ext4-superblock fields - s_usr_quota_inum and
s_grp_quota_inum for storing the quota inodes in use.
2) Default quota inodes are: inode#3 for tracking userquota and inode#4
for tracking group quota. The superblock fields can be set to use
other inodes as well.
3) If the QUOTA feature and corresponding quota inodes are set in
superblock, the quota usage tracking is turned on at mount time. On
'quotaon' ioctl, the quota limits enforcement is turned
on. 'quotaoff' ioctl turns off only the limits enforcement in this
case.
4) When QUOTA feature is in use, the quota mount options 'quota',
'usrquota', 'grpquota' are ignored by the kernel.
5) mke2fs or tune2fs can be used to set the QUOTA feature and initialize
quota inodes. The default reserved inodes will not be visible to user
as regular files.
6) The quota-tools will need to be modified to support hidden quota
files on ext4. E2fsprogs will also include support for creating and
fixing quota files.
7) Support is only for the new V2 quota file format.
Tested-by: Jan Kara <jack@suse.cz>
Reviewed-by: Jan Kara <jack@suse.cz>
Reviewed-by: Johann Lombardi <johann@whamcloud.com>
Signed-off-by: Aditya Kali <adityakali@google.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2012-07-22 20:21:31 -04:00
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2016-01-08 16:01:22 -05:00
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|
ext4: make quota as first class supported feature
This patch adds support for quotas as a first class feature in ext4;
which is to say, the quota files are stored in hidden inodes as file
system metadata, instead of as separate files visible in the file system
directory hierarchy.
It is based on the proposal at:
https://ext4.wiki.kernel.org/index.php/Design_For_1st_Class_Quota_in_Ext4
This patch introduces a new feature - EXT4_FEATURE_RO_COMPAT_QUOTA
which, when turned on, enables quota accounting at mount time
iteself. Also, the quota inodes are stored in two additional superblock
fields. Some changes introduced by this patch that should be pointed
out are:
1) Two new ext4-superblock fields - s_usr_quota_inum and
s_grp_quota_inum for storing the quota inodes in use.
2) Default quota inodes are: inode#3 for tracking userquota and inode#4
for tracking group quota. The superblock fields can be set to use
other inodes as well.
3) If the QUOTA feature and corresponding quota inodes are set in
superblock, the quota usage tracking is turned on at mount time. On
'quotaon' ioctl, the quota limits enforcement is turned
on. 'quotaoff' ioctl turns off only the limits enforcement in this
case.
4) When QUOTA feature is in use, the quota mount options 'quota',
'usrquota', 'grpquota' are ignored by the kernel.
5) mke2fs or tune2fs can be used to set the QUOTA feature and initialize
quota inodes. The default reserved inodes will not be visible to user
as regular files.
6) The quota-tools will need to be modified to support hidden quota
files on ext4. E2fsprogs will also include support for creating and
fixing quota files.
7) Support is only for the new V2 quota file format.
Tested-by: Jan Kara <jack@suse.cz>
Reviewed-by: Jan Kara <jack@suse.cz>
Reviewed-by: Johann Lombardi <johann@whamcloud.com>
Signed-off-by: Aditya Kali <adityakali@google.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2012-07-22 20:21:31 -04:00
|
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|
|
2009-08-18 00:20:23 -04:00
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2010-07-27 11:56:04 -04:00
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2014-07-05 18:40:52 -04:00
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2010-07-27 11:56:04 -04:00
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2014-07-05 18:40:52 -04:00
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2010-07-27 11:56:04 -04:00
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2016-10-12 23:12:53 -04:00
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2010-07-27 11:56:04 -04:00
|
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|
2016-10-12 23:12:53 -04:00
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2010-07-27 11:56:04 -04:00
|
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|
2016-10-12 23:12:53 -04:00
|
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2010-07-27 11:56:04 -04:00
|
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|
2014-07-05 18:40:52 -04:00
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2010-07-27 11:56:04 -04:00
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2016-10-12 23:12:53 -04:00
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|
2010-07-27 11:56:04 -04:00
|
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|
|
2016-10-12 23:12:53 -04:00
|
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|
2010-07-27 11:56:04 -04:00
|
|
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|
2016-10-12 23:12:53 -04:00
|
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2010-07-27 11:56:04 -04:00
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|
ext4: add support for lazy inode table initialization
When the lazy_itable_init extended option is passed to mke2fs, it
considerably speeds up filesystem creation because inode tables are
not zeroed out. The fact that parts of the inode table are
uninitialized is not a problem so long as the block group descriptors,
which contain information regarding how much of the inode table has
been initialized, has not been corrupted However, if the block group
checksums are not valid, e2fsck must scan the entire inode table, and
the the old, uninitialized data could potentially cause e2fsck to
report false problems.
Hence, it is important for the inode tables to be initialized as soon
as possble. This commit adds this feature so that mke2fs can safely
use the lazy inode table initialization feature to speed up formatting
file systems.
This is done via a new new kernel thread called ext4lazyinit, which is
created on demand and destroyed, when it is no longer needed. There
is only one thread for all ext4 filesystems in the system. When the
first filesystem with inititable mount option is mounted, ext4lazyinit
thread is created, then the filesystem can register its request in the
request list.
This thread then walks through the list of requests picking up
scheduled requests and invoking ext4_init_inode_table(). Next schedule
time for the request is computed by multiplying the time it took to
zero out last inode table with wait multiplier, which can be set with
the (init_itable=n) mount option (default is 10). We are doing
this so we do not take the whole I/O bandwidth. When the thread is no
longer necessary (request list is empty) it frees the appropriate
structures and exits (and can be created later later by another
filesystem).
We do not disturb regular inode allocations in any way, it just do not
care whether the inode table is, or is not zeroed. But when zeroing, we
have to skip used inodes, obviously. Also we should prevent new inode
allocations from the group, while zeroing is on the way. For that we
take write alloc_sem lock in ext4_init_inode_table() and read alloc_sem
in the ext4_claim_inode, so when we are unlucky and allocator hits the
group which is currently being zeroed, it just has to wait.
This can be suppresed using the mount option no_init_itable.
Signed-off-by: Lukas Czerner <lczerner@redhat.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2010-10-27 21:30:05 -04:00
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|
2013-01-13 08:41:45 -05:00
|
|
|
|
ext4: add support for lazy inode table initialization
When the lazy_itable_init extended option is passed to mke2fs, it
considerably speeds up filesystem creation because inode tables are
not zeroed out. The fact that parts of the inode table are
uninitialized is not a problem so long as the block group descriptors,
which contain information regarding how much of the inode table has
been initialized, has not been corrupted However, if the block group
checksums are not valid, e2fsck must scan the entire inode table, and
the the old, uninitialized data could potentially cause e2fsck to
report false problems.
Hence, it is important for the inode tables to be initialized as soon
as possble. This commit adds this feature so that mke2fs can safely
use the lazy inode table initialization feature to speed up formatting
file systems.
This is done via a new new kernel thread called ext4lazyinit, which is
created on demand and destroyed, when it is no longer needed. There
is only one thread for all ext4 filesystems in the system. When the
first filesystem with inititable mount option is mounted, ext4lazyinit
thread is created, then the filesystem can register its request in the
request list.
This thread then walks through the list of requests picking up
scheduled requests and invoking ext4_init_inode_table(). Next schedule
time for the request is computed by multiplying the time it took to
zero out last inode table with wait multiplier, which can be set with
the (init_itable=n) mount option (default is 10). We are doing
this so we do not take the whole I/O bandwidth. When the thread is no
longer necessary (request list is empty) it frees the appropriate
structures and exits (and can be created later later by another
filesystem).
We do not disturb regular inode allocations in any way, it just do not
care whether the inode table is, or is not zeroed. But when zeroing, we
have to skip used inodes, obviously. Also we should prevent new inode
allocations from the group, while zeroing is on the way. For that we
take write alloc_sem lock in ext4_init_inode_table() and read alloc_sem
in the ext4_claim_inode, so when we are unlucky and allocator hits the
group which is currently being zeroed, it just has to wait.
This can be suppresed using the mount option no_init_itable.
Signed-off-by: Lukas Czerner <lczerner@redhat.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2010-10-27 21:30:05 -04:00
|
|
|
|
|
|
|
|
|
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|
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|
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|
|
|
|
2011-05-20 13:55:16 -04:00
|
|
|
|
|
|
|
|
|
ext4: add support for lazy inode table initialization
When the lazy_itable_init extended option is passed to mke2fs, it
considerably speeds up filesystem creation because inode tables are
not zeroed out. The fact that parts of the inode table are
uninitialized is not a problem so long as the block group descriptors,
which contain information regarding how much of the inode table has
been initialized, has not been corrupted However, if the block group
checksums are not valid, e2fsck must scan the entire inode table, and
the the old, uninitialized data could potentially cause e2fsck to
report false problems.
Hence, it is important for the inode tables to be initialized as soon
as possble. This commit adds this feature so that mke2fs can safely
use the lazy inode table initialization feature to speed up formatting
file systems.
This is done via a new new kernel thread called ext4lazyinit, which is
created on demand and destroyed, when it is no longer needed. There
is only one thread for all ext4 filesystems in the system. When the
first filesystem with inititable mount option is mounted, ext4lazyinit
thread is created, then the filesystem can register its request in the
request list.
This thread then walks through the list of requests picking up
scheduled requests and invoking ext4_init_inode_table(). Next schedule
time for the request is computed by multiplying the time it took to
zero out last inode table with wait multiplier, which can be set with
the (init_itable=n) mount option (default is 10). We are doing
this so we do not take the whole I/O bandwidth. When the thread is no
longer necessary (request list is empty) it frees the appropriate
structures and exits (and can be created later later by another
filesystem).
We do not disturb regular inode allocations in any way, it just do not
care whether the inode table is, or is not zeroed. But when zeroing, we
have to skip used inodes, obviously. Also we should prevent new inode
allocations from the group, while zeroing is on the way. For that we
take write alloc_sem lock in ext4_init_inode_table() and read alloc_sem
in the ext4_claim_inode, so when we are unlucky and allocator hits the
group which is currently being zeroed, it just has to wait.
This can be suppresed using the mount option no_init_itable.
Signed-off-by: Lukas Czerner <lczerner@redhat.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2010-10-27 21:30:05 -04:00
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|
2011-05-20 13:49:04 -04:00
|
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|
|
ext4: add support for lazy inode table initialization
When the lazy_itable_init extended option is passed to mke2fs, it
considerably speeds up filesystem creation because inode tables are
not zeroed out. The fact that parts of the inode table are
uninitialized is not a problem so long as the block group descriptors,
which contain information regarding how much of the inode table has
been initialized, has not been corrupted However, if the block group
checksums are not valid, e2fsck must scan the entire inode table, and
the the old, uninitialized data could potentially cause e2fsck to
report false problems.
Hence, it is important for the inode tables to be initialized as soon
as possble. This commit adds this feature so that mke2fs can safely
use the lazy inode table initialization feature to speed up formatting
file systems.
This is done via a new new kernel thread called ext4lazyinit, which is
created on demand and destroyed, when it is no longer needed. There
is only one thread for all ext4 filesystems in the system. When the
first filesystem with inititable mount option is mounted, ext4lazyinit
thread is created, then the filesystem can register its request in the
request list.
This thread then walks through the list of requests picking up
scheduled requests and invoking ext4_init_inode_table(). Next schedule
time for the request is computed by multiplying the time it took to
zero out last inode table with wait multiplier, which can be set with
the (init_itable=n) mount option (default is 10). We are doing
this so we do not take the whole I/O bandwidth. When the thread is no
longer necessary (request list is empty) it frees the appropriate
structures and exits (and can be created later later by another
filesystem).
We do not disturb regular inode allocations in any way, it just do not
care whether the inode table is, or is not zeroed. But when zeroing, we
have to skip used inodes, obviously. Also we should prevent new inode
allocations from the group, while zeroing is on the way. For that we
take write alloc_sem lock in ext4_init_inode_table() and read alloc_sem
in the ext4_claim_inode, so when we are unlucky and allocator hits the
group which is currently being zeroed, it just has to wait.
This can be suppresed using the mount option no_init_itable.
Signed-off-by: Lukas Czerner <lczerner@redhat.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2010-10-27 21:30:05 -04:00
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2011-05-20 13:55:29 -04:00
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ext4: add support for lazy inode table initialization
When the lazy_itable_init extended option is passed to mke2fs, it
considerably speeds up filesystem creation because inode tables are
not zeroed out. The fact that parts of the inode table are
uninitialized is not a problem so long as the block group descriptors,
which contain information regarding how much of the inode table has
been initialized, has not been corrupted However, if the block group
checksums are not valid, e2fsck must scan the entire inode table, and
the the old, uninitialized data could potentially cause e2fsck to
report false problems.
Hence, it is important for the inode tables to be initialized as soon
as possble. This commit adds this feature so that mke2fs can safely
use the lazy inode table initialization feature to speed up formatting
file systems.
This is done via a new new kernel thread called ext4lazyinit, which is
created on demand and destroyed, when it is no longer needed. There
is only one thread for all ext4 filesystems in the system. When the
first filesystem with inititable mount option is mounted, ext4lazyinit
thread is created, then the filesystem can register its request in the
request list.
This thread then walks through the list of requests picking up
scheduled requests and invoking ext4_init_inode_table(). Next schedule
time for the request is computed by multiplying the time it took to
zero out last inode table with wait multiplier, which can be set with
the (init_itable=n) mount option (default is 10). We are doing
this so we do not take the whole I/O bandwidth. When the thread is no
longer necessary (request list is empty) it frees the appropriate
structures and exits (and can be created later later by another
filesystem).
We do not disturb regular inode allocations in any way, it just do not
care whether the inode table is, or is not zeroed. But when zeroing, we
have to skip used inodes, obviously. Also we should prevent new inode
allocations from the group, while zeroing is on the way. For that we
take write alloc_sem lock in ext4_init_inode_table() and read alloc_sem
in the ext4_claim_inode, so when we are unlucky and allocator hits the
group which is currently being zeroed, it just has to wait.
This can be suppresed using the mount option no_init_itable.
Signed-off-by: Lukas Czerner <lczerner@redhat.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2010-10-27 21:30:05 -04:00
|
|
|
|
2011-05-20 13:55:29 -04:00
|
|
|
|
ext4: add support for lazy inode table initialization
When the lazy_itable_init extended option is passed to mke2fs, it
considerably speeds up filesystem creation because inode tables are
not zeroed out. The fact that parts of the inode table are
uninitialized is not a problem so long as the block group descriptors,
which contain information regarding how much of the inode table has
been initialized, has not been corrupted However, if the block group
checksums are not valid, e2fsck must scan the entire inode table, and
the the old, uninitialized data could potentially cause e2fsck to
report false problems.
Hence, it is important for the inode tables to be initialized as soon
as possble. This commit adds this feature so that mke2fs can safely
use the lazy inode table initialization feature to speed up formatting
file systems.
This is done via a new new kernel thread called ext4lazyinit, which is
created on demand and destroyed, when it is no longer needed. There
is only one thread for all ext4 filesystems in the system. When the
first filesystem with inititable mount option is mounted, ext4lazyinit
thread is created, then the filesystem can register its request in the
request list.
This thread then walks through the list of requests picking up
scheduled requests and invoking ext4_init_inode_table(). Next schedule
time for the request is computed by multiplying the time it took to
zero out last inode table with wait multiplier, which can be set with
the (init_itable=n) mount option (default is 10). We are doing
this so we do not take the whole I/O bandwidth. When the thread is no
longer necessary (request list is empty) it frees the appropriate
structures and exits (and can be created later later by another
filesystem).
We do not disturb regular inode allocations in any way, it just do not
care whether the inode table is, or is not zeroed. But when zeroing, we
have to skip used inodes, obviously. Also we should prevent new inode
allocations from the group, while zeroing is on the way. For that we
take write alloc_sem lock in ext4_init_inode_table() and read alloc_sem
in the ext4_claim_inode, so when we are unlucky and allocator hits the
group which is currently being zeroed, it just has to wait.
This can be suppresed using the mount option no_init_itable.
Signed-off-by: Lukas Czerner <lczerner@redhat.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2010-10-27 21:30:05 -04:00
|
|
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|
|
2011-05-20 13:55:29 -04:00
|
|
|
|
ext4: add support for lazy inode table initialization
When the lazy_itable_init extended option is passed to mke2fs, it
considerably speeds up filesystem creation because inode tables are
not zeroed out. The fact that parts of the inode table are
uninitialized is not a problem so long as the block group descriptors,
which contain information regarding how much of the inode table has
been initialized, has not been corrupted However, if the block group
checksums are not valid, e2fsck must scan the entire inode table, and
the the old, uninitialized data could potentially cause e2fsck to
report false problems.
Hence, it is important for the inode tables to be initialized as soon
as possble. This commit adds this feature so that mke2fs can safely
use the lazy inode table initialization feature to speed up formatting
file systems.
This is done via a new new kernel thread called ext4lazyinit, which is
created on demand and destroyed, when it is no longer needed. There
is only one thread for all ext4 filesystems in the system. When the
first filesystem with inititable mount option is mounted, ext4lazyinit
thread is created, then the filesystem can register its request in the
request list.
This thread then walks through the list of requests picking up
scheduled requests and invoking ext4_init_inode_table(). Next schedule
time for the request is computed by multiplying the time it took to
zero out last inode table with wait multiplier, which can be set with
the (init_itable=n) mount option (default is 10). We are doing
this so we do not take the whole I/O bandwidth. When the thread is no
longer necessary (request list is empty) it frees the appropriate
structures and exits (and can be created later later by another
filesystem).
We do not disturb regular inode allocations in any way, it just do not
care whether the inode table is, or is not zeroed. But when zeroing, we
have to skip used inodes, obviously. Also we should prevent new inode
allocations from the group, while zeroing is on the way. For that we
take write alloc_sem lock in ext4_init_inode_table() and read alloc_sem
in the ext4_claim_inode, so when we are unlucky and allocator hits the
group which is currently being zeroed, it just has to wait.
This can be suppresed using the mount option no_init_itable.
Signed-off-by: Lukas Czerner <lczerner@redhat.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2010-10-27 21:30:05 -04:00
|
|
|
|
2011-05-20 13:55:29 -04:00
|
|
|
|
ext4: add support for lazy inode table initialization
When the lazy_itable_init extended option is passed to mke2fs, it
considerably speeds up filesystem creation because inode tables are
not zeroed out. The fact that parts of the inode table are
uninitialized is not a problem so long as the block group descriptors,
which contain information regarding how much of the inode table has
been initialized, has not been corrupted However, if the block group
checksums are not valid, e2fsck must scan the entire inode table, and
the the old, uninitialized data could potentially cause e2fsck to
report false problems.
Hence, it is important for the inode tables to be initialized as soon
as possble. This commit adds this feature so that mke2fs can safely
use the lazy inode table initialization feature to speed up formatting
file systems.
This is done via a new new kernel thread called ext4lazyinit, which is
created on demand and destroyed, when it is no longer needed. There
is only one thread for all ext4 filesystems in the system. When the
first filesystem with inititable mount option is mounted, ext4lazyinit
thread is created, then the filesystem can register its request in the
request list.
This thread then walks through the list of requests picking up
scheduled requests and invoking ext4_init_inode_table(). Next schedule
time for the request is computed by multiplying the time it took to
zero out last inode table with wait multiplier, which can be set with
the (init_itable=n) mount option (default is 10). We are doing
this so we do not take the whole I/O bandwidth. When the thread is no
longer necessary (request list is empty) it frees the appropriate
structures and exits (and can be created later later by another
filesystem).
We do not disturb regular inode allocations in any way, it just do not
care whether the inode table is, or is not zeroed. But when zeroing, we
have to skip used inodes, obviously. Also we should prevent new inode
allocations from the group, while zeroing is on the way. For that we
take write alloc_sem lock in ext4_init_inode_table() and read alloc_sem
in the ext4_claim_inode, so when we are unlucky and allocator hits the
group which is currently being zeroed, it just has to wait.
This can be suppresed using the mount option no_init_itable.
Signed-off-by: Lukas Czerner <lczerner@redhat.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2010-10-27 21:30:05 -04:00
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2011-02-03 14:33:15 -05:00
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|
ext4: add support for lazy inode table initialization
When the lazy_itable_init extended option is passed to mke2fs, it
considerably speeds up filesystem creation because inode tables are
not zeroed out. The fact that parts of the inode table are
uninitialized is not a problem so long as the block group descriptors,
which contain information regarding how much of the inode table has
been initialized, has not been corrupted However, if the block group
checksums are not valid, e2fsck must scan the entire inode table, and
the the old, uninitialized data could potentially cause e2fsck to
report false problems.
Hence, it is important for the inode tables to be initialized as soon
as possble. This commit adds this feature so that mke2fs can safely
use the lazy inode table initialization feature to speed up formatting
file systems.
This is done via a new new kernel thread called ext4lazyinit, which is
created on demand and destroyed, when it is no longer needed. There
is only one thread for all ext4 filesystems in the system. When the
first filesystem with inititable mount option is mounted, ext4lazyinit
thread is created, then the filesystem can register its request in the
request list.
This thread then walks through the list of requests picking up
scheduled requests and invoking ext4_init_inode_table(). Next schedule
time for the request is computed by multiplying the time it took to
zero out last inode table with wait multiplier, which can be set with
the (init_itable=n) mount option (default is 10). We are doing
this so we do not take the whole I/O bandwidth. When the thread is no
longer necessary (request list is empty) it frees the appropriate
structures and exits (and can be created later later by another
filesystem).
We do not disturb regular inode allocations in any way, it just do not
care whether the inode table is, or is not zeroed. But when zeroing, we
have to skip used inodes, obviously. Also we should prevent new inode
allocations from the group, while zeroing is on the way. For that we
take write alloc_sem lock in ext4_init_inode_table() and read alloc_sem
in the ext4_claim_inode, so when we are unlucky and allocator hits the
group which is currently being zeroed, it just has to wait.
This can be suppresed using the mount option no_init_itable.
Signed-off-by: Lukas Czerner <lczerner@redhat.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2010-10-27 21:30:05 -04:00
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2011-05-20 13:49:04 -04:00
|
|
|
|
ext4: add support for lazy inode table initialization
When the lazy_itable_init extended option is passed to mke2fs, it
considerably speeds up filesystem creation because inode tables are
not zeroed out. The fact that parts of the inode table are
uninitialized is not a problem so long as the block group descriptors,
which contain information regarding how much of the inode table has
been initialized, has not been corrupted However, if the block group
checksums are not valid, e2fsck must scan the entire inode table, and
the the old, uninitialized data could potentially cause e2fsck to
report false problems.
Hence, it is important for the inode tables to be initialized as soon
as possble. This commit adds this feature so that mke2fs can safely
use the lazy inode table initialization feature to speed up formatting
file systems.
This is done via a new new kernel thread called ext4lazyinit, which is
created on demand and destroyed, when it is no longer needed. There
is only one thread for all ext4 filesystems in the system. When the
first filesystem with inititable mount option is mounted, ext4lazyinit
thread is created, then the filesystem can register its request in the
request list.
This thread then walks through the list of requests picking up
scheduled requests and invoking ext4_init_inode_table(). Next schedule
time for the request is computed by multiplying the time it took to
zero out last inode table with wait multiplier, which can be set with
the (init_itable=n) mount option (default is 10). We are doing
this so we do not take the whole I/O bandwidth. When the thread is no
longer necessary (request list is empty) it frees the appropriate
structures and exits (and can be created later later by another
filesystem).
We do not disturb regular inode allocations in any way, it just do not
care whether the inode table is, or is not zeroed. But when zeroing, we
have to skip used inodes, obviously. Also we should prevent new inode
allocations from the group, while zeroing is on the way. For that we
take write alloc_sem lock in ext4_init_inode_table() and read alloc_sem
in the ext4_claim_inode, so when we are unlucky and allocator hits the
group which is currently being zeroed, it just has to wait.
This can be suppresed using the mount option no_init_itable.
Signed-off-by: Lukas Czerner <lczerner@redhat.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2010-10-27 21:30:05 -04:00
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2016-09-05 23:38:36 -04:00
|
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|
|
|
|
|
|
ext4: add support for lazy inode table initialization
When the lazy_itable_init extended option is passed to mke2fs, it
considerably speeds up filesystem creation because inode tables are
not zeroed out. The fact that parts of the inode table are
uninitialized is not a problem so long as the block group descriptors,
which contain information regarding how much of the inode table has
been initialized, has not been corrupted However, if the block group
checksums are not valid, e2fsck must scan the entire inode table, and
the the old, uninitialized data could potentially cause e2fsck to
report false problems.
Hence, it is important for the inode tables to be initialized as soon
as possble. This commit adds this feature so that mke2fs can safely
use the lazy inode table initialization feature to speed up formatting
file systems.
This is done via a new new kernel thread called ext4lazyinit, which is
created on demand and destroyed, when it is no longer needed. There
is only one thread for all ext4 filesystems in the system. When the
first filesystem with inititable mount option is mounted, ext4lazyinit
thread is created, then the filesystem can register its request in the
request list.
This thread then walks through the list of requests picking up
scheduled requests and invoking ext4_init_inode_table(). Next schedule
time for the request is computed by multiplying the time it took to
zero out last inode table with wait multiplier, which can be set with
the (init_itable=n) mount option (default is 10). We are doing
this so we do not take the whole I/O bandwidth. When the thread is no
longer necessary (request list is empty) it frees the appropriate
structures and exits (and can be created later later by another
filesystem).
We do not disturb regular inode allocations in any way, it just do not
care whether the inode table is, or is not zeroed. But when zeroing, we
have to skip used inodes, obviously. Also we should prevent new inode
allocations from the group, while zeroing is on the way. For that we
take write alloc_sem lock in ext4_init_inode_table() and read alloc_sem
in the ext4_claim_inode, so when we are unlucky and allocator hits the
group which is currently being zeroed, it just has to wait.
This can be suppresed using the mount option no_init_itable.
Signed-off-by: Lukas Czerner <lczerner@redhat.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2010-10-27 21:30:05 -04:00
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2016-09-05 23:38:36 -04:00
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2010-11-02 14:19:30 -04:00
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2016-09-05 23:38:36 -04:00
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ext4: add support for lazy inode table initialization
When the lazy_itable_init extended option is passed to mke2fs, it
considerably speeds up filesystem creation because inode tables are
not zeroed out. The fact that parts of the inode table are
uninitialized is not a problem so long as the block group descriptors,
which contain information regarding how much of the inode table has
been initialized, has not been corrupted However, if the block group
checksums are not valid, e2fsck must scan the entire inode table, and
the the old, uninitialized data could potentially cause e2fsck to
report false problems.
Hence, it is important for the inode tables to be initialized as soon
as possble. This commit adds this feature so that mke2fs can safely
use the lazy inode table initialization feature to speed up formatting
file systems.
This is done via a new new kernel thread called ext4lazyinit, which is
created on demand and destroyed, when it is no longer needed. There
is only one thread for all ext4 filesystems in the system. When the
first filesystem with inititable mount option is mounted, ext4lazyinit
thread is created, then the filesystem can register its request in the
request list.
This thread then walks through the list of requests picking up
scheduled requests and invoking ext4_init_inode_table(). Next schedule
time for the request is computed by multiplying the time it took to
zero out last inode table with wait multiplier, which can be set with
the (init_itable=n) mount option (default is 10). We are doing
this so we do not take the whole I/O bandwidth. When the thread is no
longer necessary (request list is empty) it frees the appropriate
structures and exits (and can be created later later by another
filesystem).
We do not disturb regular inode allocations in any way, it just do not
care whether the inode table is, or is not zeroed. But when zeroing, we
have to skip used inodes, obviously. Also we should prevent new inode
allocations from the group, while zeroing is on the way. For that we
take write alloc_sem lock in ext4_init_inode_table() and read alloc_sem
in the ext4_claim_inode, so when we are unlucky and allocator hits the
group which is currently being zeroed, it just has to wait.
This can be suppresed using the mount option no_init_itable.
Signed-off-by: Lukas Czerner <lczerner@redhat.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2010-10-27 21:30:05 -04:00
|
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|
2011-11-21 12:32:22 -08:00
|
|
|
|
ext4: add support for lazy inode table initialization
When the lazy_itable_init extended option is passed to mke2fs, it
considerably speeds up filesystem creation because inode tables are
not zeroed out. The fact that parts of the inode table are
uninitialized is not a problem so long as the block group descriptors,
which contain information regarding how much of the inode table has
been initialized, has not been corrupted However, if the block group
checksums are not valid, e2fsck must scan the entire inode table, and
the the old, uninitialized data could potentially cause e2fsck to
report false problems.
Hence, it is important for the inode tables to be initialized as soon
as possble. This commit adds this feature so that mke2fs can safely
use the lazy inode table initialization feature to speed up formatting
file systems.
This is done via a new new kernel thread called ext4lazyinit, which is
created on demand and destroyed, when it is no longer needed. There
is only one thread for all ext4 filesystems in the system. When the
first filesystem with inititable mount option is mounted, ext4lazyinit
thread is created, then the filesystem can register its request in the
request list.
This thread then walks through the list of requests picking up
scheduled requests and invoking ext4_init_inode_table(). Next schedule
time for the request is computed by multiplying the time it took to
zero out last inode table with wait multiplier, which can be set with
the (init_itable=n) mount option (default is 10). We are doing
this so we do not take the whole I/O bandwidth. When the thread is no
longer necessary (request list is empty) it frees the appropriate
structures and exits (and can be created later later by another
filesystem).
We do not disturb regular inode allocations in any way, it just do not
care whether the inode table is, or is not zeroed. But when zeroing, we
have to skip used inodes, obviously. Also we should prevent new inode
allocations from the group, while zeroing is on the way. For that we
take write alloc_sem lock in ext4_init_inode_table() and read alloc_sem
in the ext4_claim_inode, so when we are unlucky and allocator hits the
group which is currently being zeroed, it just has to wait.
This can be suppresed using the mount option no_init_itable.
Signed-off-by: Lukas Czerner <lczerner@redhat.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2010-10-27 21:30:05 -04:00
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2011-05-20 13:49:04 -04:00
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2010-11-02 14:07:17 -04:00
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ext4: add support for lazy inode table initialization
When the lazy_itable_init extended option is passed to mke2fs, it
considerably speeds up filesystem creation because inode tables are
not zeroed out. The fact that parts of the inode table are
uninitialized is not a problem so long as the block group descriptors,
which contain information regarding how much of the inode table has
been initialized, has not been corrupted However, if the block group
checksums are not valid, e2fsck must scan the entire inode table, and
the the old, uninitialized data could potentially cause e2fsck to
report false problems.
Hence, it is important for the inode tables to be initialized as soon
as possble. This commit adds this feature so that mke2fs can safely
use the lazy inode table initialization feature to speed up formatting
file systems.
This is done via a new new kernel thread called ext4lazyinit, which is
created on demand and destroyed, when it is no longer needed. There
is only one thread for all ext4 filesystems in the system. When the
first filesystem with inititable mount option is mounted, ext4lazyinit
thread is created, then the filesystem can register its request in the
request list.
This thread then walks through the list of requests picking up
scheduled requests and invoking ext4_init_inode_table(). Next schedule
time for the request is computed by multiplying the time it took to
zero out last inode table with wait multiplier, which can be set with
the (init_itable=n) mount option (default is 10). We are doing
this so we do not take the whole I/O bandwidth. When the thread is no
longer necessary (request list is empty) it frees the appropriate
structures and exits (and can be created later later by another
filesystem).
We do not disturb regular inode allocations in any way, it just do not
care whether the inode table is, or is not zeroed. But when zeroing, we
have to skip used inodes, obviously. Also we should prevent new inode
allocations from the group, while zeroing is on the way. For that we
take write alloc_sem lock in ext4_init_inode_table() and read alloc_sem
in the ext4_claim_inode, so when we are unlucky and allocator hits the
group which is currently being zeroed, it just has to wait.
This can be suppresed using the mount option no_init_itable.
Signed-off-by: Lukas Czerner <lczerner@redhat.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2010-10-27 21:30:05 -04:00
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2011-05-20 13:49:04 -04:00
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2011-02-03 14:33:15 -05:00
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ext4: add support for lazy inode table initialization
When the lazy_itable_init extended option is passed to mke2fs, it
considerably speeds up filesystem creation because inode tables are
not zeroed out. The fact that parts of the inode table are
uninitialized is not a problem so long as the block group descriptors,
which contain information regarding how much of the inode table has
been initialized, has not been corrupted However, if the block group
checksums are not valid, e2fsck must scan the entire inode table, and
the the old, uninitialized data could potentially cause e2fsck to
report false problems.
Hence, it is important for the inode tables to be initialized as soon
as possble. This commit adds this feature so that mke2fs can safely
use the lazy inode table initialization feature to speed up formatting
file systems.
This is done via a new new kernel thread called ext4lazyinit, which is
created on demand and destroyed, when it is no longer needed. There
is only one thread for all ext4 filesystems in the system. When the
first filesystem with inititable mount option is mounted, ext4lazyinit
thread is created, then the filesystem can register its request in the
request list.
This thread then walks through the list of requests picking up
scheduled requests and invoking ext4_init_inode_table(). Next schedule
time for the request is computed by multiplying the time it took to
zero out last inode table with wait multiplier, which can be set with
the (init_itable=n) mount option (default is 10). We are doing
this so we do not take the whole I/O bandwidth. When the thread is no
longer necessary (request list is empty) it frees the appropriate
structures and exits (and can be created later later by another
filesystem).
We do not disturb regular inode allocations in any way, it just do not
care whether the inode table is, or is not zeroed. But when zeroing, we
have to skip used inodes, obviously. Also we should prevent new inode
allocations from the group, while zeroing is on the way. For that we
take write alloc_sem lock in ext4_init_inode_table() and read alloc_sem
in the ext4_claim_inode, so when we are unlucky and allocator hits the
group which is currently being zeroed, it just has to wait.
This can be suppresed using the mount option no_init_itable.
Signed-off-by: Lukas Czerner <lczerner@redhat.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2010-10-27 21:30:05 -04:00
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2011-02-03 14:33:15 -05:00
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ext4: add support for lazy inode table initialization
When the lazy_itable_init extended option is passed to mke2fs, it
considerably speeds up filesystem creation because inode tables are
not zeroed out. The fact that parts of the inode table are
uninitialized is not a problem so long as the block group descriptors,
which contain information regarding how much of the inode table has
been initialized, has not been corrupted However, if the block group
checksums are not valid, e2fsck must scan the entire inode table, and
the the old, uninitialized data could potentially cause e2fsck to
report false problems.
Hence, it is important for the inode tables to be initialized as soon
as possble. This commit adds this feature so that mke2fs can safely
use the lazy inode table initialization feature to speed up formatting
file systems.
This is done via a new new kernel thread called ext4lazyinit, which is
created on demand and destroyed, when it is no longer needed. There
is only one thread for all ext4 filesystems in the system. When the
first filesystem with inititable mount option is mounted, ext4lazyinit
thread is created, then the filesystem can register its request in the
request list.
This thread then walks through the list of requests picking up
scheduled requests and invoking ext4_init_inode_table(). Next schedule
time for the request is computed by multiplying the time it took to
zero out last inode table with wait multiplier, which can be set with
the (init_itable=n) mount option (default is 10). We are doing
this so we do not take the whole I/O bandwidth. When the thread is no
longer necessary (request list is empty) it frees the appropriate
structures and exits (and can be created later later by another
filesystem).
We do not disturb regular inode allocations in any way, it just do not
care whether the inode table is, or is not zeroed. But when zeroing, we
have to skip used inodes, obviously. Also we should prevent new inode
allocations from the group, while zeroing is on the way. For that we
take write alloc_sem lock in ext4_init_inode_table() and read alloc_sem
in the ext4_claim_inode, so when we are unlucky and allocator hits the
group which is currently being zeroed, it just has to wait.
This can be suppresed using the mount option no_init_itable.
Signed-off-by: Lukas Czerner <lczerner@redhat.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2010-10-27 21:30:05 -04:00
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2012-03-19 23:41:49 -04:00
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ext4: add support for lazy inode table initialization
When the lazy_itable_init extended option is passed to mke2fs, it
considerably speeds up filesystem creation because inode tables are
not zeroed out. The fact that parts of the inode table are
uninitialized is not a problem so long as the block group descriptors,
which contain information regarding how much of the inode table has
been initialized, has not been corrupted However, if the block group
checksums are not valid, e2fsck must scan the entire inode table, and
the the old, uninitialized data could potentially cause e2fsck to
report false problems.
Hence, it is important for the inode tables to be initialized as soon
as possble. This commit adds this feature so that mke2fs can safely
use the lazy inode table initialization feature to speed up formatting
file systems.
This is done via a new new kernel thread called ext4lazyinit, which is
created on demand and destroyed, when it is no longer needed. There
is only one thread for all ext4 filesystems in the system. When the
first filesystem with inititable mount option is mounted, ext4lazyinit
thread is created, then the filesystem can register its request in the
request list.
This thread then walks through the list of requests picking up
scheduled requests and invoking ext4_init_inode_table(). Next schedule
time for the request is computed by multiplying the time it took to
zero out last inode table with wait multiplier, which can be set with
the (init_itable=n) mount option (default is 10). We are doing
this so we do not take the whole I/O bandwidth. When the thread is no
longer necessary (request list is empty) it frees the appropriate
structures and exits (and can be created later later by another
filesystem).
We do not disturb regular inode allocations in any way, it just do not
care whether the inode table is, or is not zeroed. But when zeroing, we
have to skip used inodes, obviously. Also we should prevent new inode
allocations from the group, while zeroing is on the way. For that we
take write alloc_sem lock in ext4_init_inode_table() and read alloc_sem
in the ext4_claim_inode, so when we are unlucky and allocator hits the
group which is currently being zeroed, it just has to wait.
This can be suppresed using the mount option no_init_itable.
Signed-off-by: Lukas Czerner <lczerner@redhat.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2010-10-27 21:30:05 -04:00
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2013-11-08 00:14:53 -05:00
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ext4: add support for lazy inode table initialization
When the lazy_itable_init extended option is passed to mke2fs, it
considerably speeds up filesystem creation because inode tables are
not zeroed out. The fact that parts of the inode table are
uninitialized is not a problem so long as the block group descriptors,
which contain information regarding how much of the inode table has
been initialized, has not been corrupted However, if the block group
checksums are not valid, e2fsck must scan the entire inode table, and
the the old, uninitialized data could potentially cause e2fsck to
report false problems.
Hence, it is important for the inode tables to be initialized as soon
as possble. This commit adds this feature so that mke2fs can safely
use the lazy inode table initialization feature to speed up formatting
file systems.
This is done via a new new kernel thread called ext4lazyinit, which is
created on demand and destroyed, when it is no longer needed. There
is only one thread for all ext4 filesystems in the system. When the
first filesystem with inititable mount option is mounted, ext4lazyinit
thread is created, then the filesystem can register its request in the
request list.
This thread then walks through the list of requests picking up
scheduled requests and invoking ext4_init_inode_table(). Next schedule
time for the request is computed by multiplying the time it took to
zero out last inode table with wait multiplier, which can be set with
the (init_itable=n) mount option (default is 10). We are doing
this so we do not take the whole I/O bandwidth. When the thread is no
longer necessary (request list is empty) it frees the appropriate
structures and exits (and can be created later later by another
filesystem).
We do not disturb regular inode allocations in any way, it just do not
care whether the inode table is, or is not zeroed. But when zeroing, we
have to skip used inodes, obviously. Also we should prevent new inode
allocations from the group, while zeroing is on the way. For that we
take write alloc_sem lock in ext4_init_inode_table() and read alloc_sem
in the ext4_claim_inode, so when we are unlucky and allocator hits the
group which is currently being zeroed, it just has to wait.
This can be suppresed using the mount option no_init_itable.
Signed-off-by: Lukas Czerner <lczerner@redhat.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2010-10-27 21:30:05 -04:00
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2013-01-13 08:41:45 -05:00
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|
ext4: add support for lazy inode table initialization
When the lazy_itable_init extended option is passed to mke2fs, it
considerably speeds up filesystem creation because inode tables are
not zeroed out. The fact that parts of the inode table are
uninitialized is not a problem so long as the block group descriptors,
which contain information regarding how much of the inode table has
been initialized, has not been corrupted However, if the block group
checksums are not valid, e2fsck must scan the entire inode table, and
the the old, uninitialized data could potentially cause e2fsck to
report false problems.
Hence, it is important for the inode tables to be initialized as soon
as possble. This commit adds this feature so that mke2fs can safely
use the lazy inode table initialization feature to speed up formatting
file systems.
This is done via a new new kernel thread called ext4lazyinit, which is
created on demand and destroyed, when it is no longer needed. There
is only one thread for all ext4 filesystems in the system. When the
first filesystem with inititable mount option is mounted, ext4lazyinit
thread is created, then the filesystem can register its request in the
request list.
This thread then walks through the list of requests picking up
scheduled requests and invoking ext4_init_inode_table(). Next schedule
time for the request is computed by multiplying the time it took to
zero out last inode table with wait multiplier, which can be set with
the (init_itable=n) mount option (default is 10). We are doing
this so we do not take the whole I/O bandwidth. When the thread is no
longer necessary (request list is empty) it frees the appropriate
structures and exits (and can be created later later by another
filesystem).
We do not disturb regular inode allocations in any way, it just do not
care whether the inode table is, or is not zeroed. But when zeroing, we
have to skip used inodes, obviously. Also we should prevent new inode
allocations from the group, while zeroing is on the way. For that we
take write alloc_sem lock in ext4_init_inode_table() and read alloc_sem
in the ext4_claim_inode, so when we are unlucky and allocator hits the
group which is currently being zeroed, it just has to wait.
This can be suppresed using the mount option no_init_itable.
Signed-off-by: Lukas Czerner <lczerner@redhat.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2010-10-27 21:30:05 -04:00
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|
2013-01-13 08:41:45 -05:00
|
|
|
|
ext4: add support for lazy inode table initialization
When the lazy_itable_init extended option is passed to mke2fs, it
considerably speeds up filesystem creation because inode tables are
not zeroed out. The fact that parts of the inode table are
uninitialized is not a problem so long as the block group descriptors,
which contain information regarding how much of the inode table has
been initialized, has not been corrupted However, if the block group
checksums are not valid, e2fsck must scan the entire inode table, and
the the old, uninitialized data could potentially cause e2fsck to
report false problems.
Hence, it is important for the inode tables to be initialized as soon
as possble. This commit adds this feature so that mke2fs can safely
use the lazy inode table initialization feature to speed up formatting
file systems.
This is done via a new new kernel thread called ext4lazyinit, which is
created on demand and destroyed, when it is no longer needed. There
is only one thread for all ext4 filesystems in the system. When the
first filesystem with inititable mount option is mounted, ext4lazyinit
thread is created, then the filesystem can register its request in the
request list.
This thread then walks through the list of requests picking up
scheduled requests and invoking ext4_init_inode_table(). Next schedule
time for the request is computed by multiplying the time it took to
zero out last inode table with wait multiplier, which can be set with
the (init_itable=n) mount option (default is 10). We are doing
this so we do not take the whole I/O bandwidth. When the thread is no
longer necessary (request list is empty) it frees the appropriate
structures and exits (and can be created later later by another
filesystem).
We do not disturb regular inode allocations in any way, it just do not
care whether the inode table is, or is not zeroed. But when zeroing, we
have to skip used inodes, obviously. Also we should prevent new inode
allocations from the group, while zeroing is on the way. For that we
take write alloc_sem lock in ext4_init_inode_table() and read alloc_sem
in the ext4_claim_inode, so when we are unlucky and allocator hits the
group which is currently being zeroed, it just has to wait.
This can be suppresed using the mount option no_init_itable.
Signed-off-by: Lukas Czerner <lczerner@redhat.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2010-10-27 21:30:05 -04:00
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|
2011-01-10 12:30:17 -05:00
|
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|
|
ext4: add support for lazy inode table initialization
When the lazy_itable_init extended option is passed to mke2fs, it
considerably speeds up filesystem creation because inode tables are
not zeroed out. The fact that parts of the inode table are
uninitialized is not a problem so long as the block group descriptors,
which contain information regarding how much of the inode table has
been initialized, has not been corrupted However, if the block group
checksums are not valid, e2fsck must scan the entire inode table, and
the the old, uninitialized data could potentially cause e2fsck to
report false problems.
Hence, it is important for the inode tables to be initialized as soon
as possble. This commit adds this feature so that mke2fs can safely
use the lazy inode table initialization feature to speed up formatting
file systems.
This is done via a new new kernel thread called ext4lazyinit, which is
created on demand and destroyed, when it is no longer needed. There
is only one thread for all ext4 filesystems in the system. When the
first filesystem with inititable mount option is mounted, ext4lazyinit
thread is created, then the filesystem can register its request in the
request list.
This thread then walks through the list of requests picking up
scheduled requests and invoking ext4_init_inode_table(). Next schedule
time for the request is computed by multiplying the time it took to
zero out last inode table with wait multiplier, which can be set with
the (init_itable=n) mount option (default is 10). We are doing
this so we do not take the whole I/O bandwidth. When the thread is no
longer necessary (request list is empty) it frees the appropriate
structures and exits (and can be created later later by another
filesystem).
We do not disturb regular inode allocations in any way, it just do not
care whether the inode table is, or is not zeroed. But when zeroing, we
have to skip used inodes, obviously. Also we should prevent new inode
allocations from the group, while zeroing is on the way. For that we
take write alloc_sem lock in ext4_init_inode_table() and read alloc_sem
in the ext4_claim_inode, so when we are unlucky and allocator hits the
group which is currently being zeroed, it just has to wait.
This can be suppresed using the mount option no_init_itable.
Signed-off-by: Lukas Czerner <lczerner@redhat.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2010-10-27 21:30:05 -04:00
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|
|
2013-01-13 08:41:45 -05:00
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2011-05-20 13:55:16 -04:00
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2013-01-13 08:41:45 -05:00
|
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|
2011-05-20 13:55:16 -04:00
|
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|
|
ext4: add support for lazy inode table initialization
When the lazy_itable_init extended option is passed to mke2fs, it
considerably speeds up filesystem creation because inode tables are
not zeroed out. The fact that parts of the inode table are
uninitialized is not a problem so long as the block group descriptors,
which contain information regarding how much of the inode table has
been initialized, has not been corrupted However, if the block group
checksums are not valid, e2fsck must scan the entire inode table, and
the the old, uninitialized data could potentially cause e2fsck to
report false problems.
Hence, it is important for the inode tables to be initialized as soon
as possble. This commit adds this feature so that mke2fs can safely
use the lazy inode table initialization feature to speed up formatting
file systems.
This is done via a new new kernel thread called ext4lazyinit, which is
created on demand and destroyed, when it is no longer needed. There
is only one thread for all ext4 filesystems in the system. When the
first filesystem with inititable mount option is mounted, ext4lazyinit
thread is created, then the filesystem can register its request in the
request list.
This thread then walks through the list of requests picking up
scheduled requests and invoking ext4_init_inode_table(). Next schedule
time for the request is computed by multiplying the time it took to
zero out last inode table with wait multiplier, which can be set with
the (init_itable=n) mount option (default is 10). We are doing
this so we do not take the whole I/O bandwidth. When the thread is no
longer necessary (request list is empty) it frees the appropriate
structures and exits (and can be created later later by another
filesystem).
We do not disturb regular inode allocations in any way, it just do not
care whether the inode table is, or is not zeroed. But when zeroing, we
have to skip used inodes, obviously. Also we should prevent new inode
allocations from the group, while zeroing is on the way. For that we
take write alloc_sem lock in ext4_init_inode_table() and read alloc_sem
in the ext4_claim_inode, so when we are unlucky and allocator hits the
group which is currently being zeroed, it just has to wait.
This can be suppresed using the mount option no_init_itable.
Signed-off-by: Lukas Czerner <lczerner@redhat.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2010-10-27 21:30:05 -04:00
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2011-05-09 10:28:41 -04:00
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|
2013-01-13 08:41:45 -05:00
|
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|
ext4: add support for lazy inode table initialization
When the lazy_itable_init extended option is passed to mke2fs, it
considerably speeds up filesystem creation because inode tables are
not zeroed out. The fact that parts of the inode table are
uninitialized is not a problem so long as the block group descriptors,
which contain information regarding how much of the inode table has
been initialized, has not been corrupted However, if the block group
checksums are not valid, e2fsck must scan the entire inode table, and
the the old, uninitialized data could potentially cause e2fsck to
report false problems.
Hence, it is important for the inode tables to be initialized as soon
as possble. This commit adds this feature so that mke2fs can safely
use the lazy inode table initialization feature to speed up formatting
file systems.
This is done via a new new kernel thread called ext4lazyinit, which is
created on demand and destroyed, when it is no longer needed. There
is only one thread for all ext4 filesystems in the system. When the
first filesystem with inititable mount option is mounted, ext4lazyinit
thread is created, then the filesystem can register its request in the
request list.
This thread then walks through the list of requests picking up
scheduled requests and invoking ext4_init_inode_table(). Next schedule
time for the request is computed by multiplying the time it took to
zero out last inode table with wait multiplier, which can be set with
the (init_itable=n) mount option (default is 10). We are doing
this so we do not take the whole I/O bandwidth. When the thread is no
longer necessary (request list is empty) it frees the appropriate
structures and exits (and can be created later later by another
filesystem).
We do not disturb regular inode allocations in any way, it just do not
care whether the inode table is, or is not zeroed. But when zeroing, we
have to skip used inodes, obviously. Also we should prevent new inode
allocations from the group, while zeroing is on the way. For that we
take write alloc_sem lock in ext4_init_inode_table() and read alloc_sem
in the ext4_claim_inode, so when we are unlucky and allocator hits the
group which is currently being zeroed, it just has to wait.
This can be suppresed using the mount option no_init_itable.
Signed-off-by: Lukas Czerner <lczerner@redhat.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2010-10-27 21:30:05 -04:00
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|
2013-01-13 08:41:45 -05:00
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|
|
|
ext4: add support for lazy inode table initialization
When the lazy_itable_init extended option is passed to mke2fs, it
considerably speeds up filesystem creation because inode tables are
not zeroed out. The fact that parts of the inode table are
uninitialized is not a problem so long as the block group descriptors,
which contain information regarding how much of the inode table has
been initialized, has not been corrupted However, if the block group
checksums are not valid, e2fsck must scan the entire inode table, and
the the old, uninitialized data could potentially cause e2fsck to
report false problems.
Hence, it is important for the inode tables to be initialized as soon
as possble. This commit adds this feature so that mke2fs can safely
use the lazy inode table initialization feature to speed up formatting
file systems.
This is done via a new new kernel thread called ext4lazyinit, which is
created on demand and destroyed, when it is no longer needed. There
is only one thread for all ext4 filesystems in the system. When the
first filesystem with inititable mount option is mounted, ext4lazyinit
thread is created, then the filesystem can register its request in the
request list.
This thread then walks through the list of requests picking up
scheduled requests and invoking ext4_init_inode_table(). Next schedule
time for the request is computed by multiplying the time it took to
zero out last inode table with wait multiplier, which can be set with
the (init_itable=n) mount option (default is 10). We are doing
this so we do not take the whole I/O bandwidth. When the thread is no
longer necessary (request list is empty) it frees the appropriate
structures and exits (and can be created later later by another
filesystem).
We do not disturb regular inode allocations in any way, it just do not
care whether the inode table is, or is not zeroed. But when zeroing, we
have to skip used inodes, obviously. Also we should prevent new inode
allocations from the group, while zeroing is on the way. For that we
take write alloc_sem lock in ext4_init_inode_table() and read alloc_sem
in the ext4_claim_inode, so when we are unlucky and allocator hits the
group which is currently being zeroed, it just has to wait.
This can be suppresed using the mount option no_init_itable.
Signed-off-by: Lukas Czerner <lczerner@redhat.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2010-10-27 21:30:05 -04:00
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2011-04-04 16:00:49 -04:00
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|
ext4: add support for lazy inode table initialization
When the lazy_itable_init extended option is passed to mke2fs, it
considerably speeds up filesystem creation because inode tables are
not zeroed out. The fact that parts of the inode table are
uninitialized is not a problem so long as the block group descriptors,
which contain information regarding how much of the inode table has
been initialized, has not been corrupted However, if the block group
checksums are not valid, e2fsck must scan the entire inode table, and
the the old, uninitialized data could potentially cause e2fsck to
report false problems.
Hence, it is important for the inode tables to be initialized as soon
as possble. This commit adds this feature so that mke2fs can safely
use the lazy inode table initialization feature to speed up formatting
file systems.
This is done via a new new kernel thread called ext4lazyinit, which is
created on demand and destroyed, when it is no longer needed. There
is only one thread for all ext4 filesystems in the system. When the
first filesystem with inititable mount option is mounted, ext4lazyinit
thread is created, then the filesystem can register its request in the
request list.
This thread then walks through the list of requests picking up
scheduled requests and invoking ext4_init_inode_table(). Next schedule
time for the request is computed by multiplying the time it took to
zero out last inode table with wait multiplier, which can be set with
the (init_itable=n) mount option (default is 10). We are doing
this so we do not take the whole I/O bandwidth. When the thread is no
longer necessary (request list is empty) it frees the appropriate
structures and exits (and can be created later later by another
filesystem).
We do not disturb regular inode allocations in any way, it just do not
care whether the inode table is, or is not zeroed. But when zeroing, we
have to skip used inodes, obviously. Also we should prevent new inode
allocations from the group, while zeroing is on the way. For that we
take write alloc_sem lock in ext4_init_inode_table() and read alloc_sem
in the ext4_claim_inode, so when we are unlucky and allocator hits the
group which is currently being zeroed, it just has to wait.
This can be suppresed using the mount option no_init_itable.
Signed-off-by: Lukas Czerner <lczerner@redhat.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2010-10-27 21:30:05 -04:00
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2010-10-27 22:08:42 -04:00
|
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|
|
|
|
|
|
|
ext4: add support for lazy inode table initialization
When the lazy_itable_init extended option is passed to mke2fs, it
considerably speeds up filesystem creation because inode tables are
not zeroed out. The fact that parts of the inode table are
uninitialized is not a problem so long as the block group descriptors,
which contain information regarding how much of the inode table has
been initialized, has not been corrupted However, if the block group
checksums are not valid, e2fsck must scan the entire inode table, and
the the old, uninitialized data could potentially cause e2fsck to
report false problems.
Hence, it is important for the inode tables to be initialized as soon
as possble. This commit adds this feature so that mke2fs can safely
use the lazy inode table initialization feature to speed up formatting
file systems.
This is done via a new new kernel thread called ext4lazyinit, which is
created on demand and destroyed, when it is no longer needed. There
is only one thread for all ext4 filesystems in the system. When the
first filesystem with inititable mount option is mounted, ext4lazyinit
thread is created, then the filesystem can register its request in the
request list.
This thread then walks through the list of requests picking up
scheduled requests and invoking ext4_init_inode_table(). Next schedule
time for the request is computed by multiplying the time it took to
zero out last inode table with wait multiplier, which can be set with
the (init_itable=n) mount option (default is 10). We are doing
this so we do not take the whole I/O bandwidth. When the thread is no
longer necessary (request list is empty) it frees the appropriate
structures and exits (and can be created later later by another
filesystem).
We do not disturb regular inode allocations in any way, it just do not
care whether the inode table is, or is not zeroed. But when zeroing, we
have to skip used inodes, obviously. Also we should prevent new inode
allocations from the group, while zeroing is on the way. For that we
take write alloc_sem lock in ext4_init_inode_table() and read alloc_sem
in the ext4_claim_inode, so when we are unlucky and allocator hits the
group which is currently being zeroed, it just has to wait.
This can be suppresed using the mount option no_init_itable.
Signed-off-by: Lukas Czerner <lczerner@redhat.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2010-10-27 21:30:05 -04:00
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2011-02-03 14:33:15 -05:00
|
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|
|
ext4: add support for lazy inode table initialization
When the lazy_itable_init extended option is passed to mke2fs, it
considerably speeds up filesystem creation because inode tables are
not zeroed out. The fact that parts of the inode table are
uninitialized is not a problem so long as the block group descriptors,
which contain information regarding how much of the inode table has
been initialized, has not been corrupted However, if the block group
checksums are not valid, e2fsck must scan the entire inode table, and
the the old, uninitialized data could potentially cause e2fsck to
report false problems.
Hence, it is important for the inode tables to be initialized as soon
as possble. This commit adds this feature so that mke2fs can safely
use the lazy inode table initialization feature to speed up formatting
file systems.
This is done via a new new kernel thread called ext4lazyinit, which is
created on demand and destroyed, when it is no longer needed. There
is only one thread for all ext4 filesystems in the system. When the
first filesystem with inititable mount option is mounted, ext4lazyinit
thread is created, then the filesystem can register its request in the
request list.
This thread then walks through the list of requests picking up
scheduled requests and invoking ext4_init_inode_table(). Next schedule
time for the request is computed by multiplying the time it took to
zero out last inode table with wait multiplier, which can be set with
the (init_itable=n) mount option (default is 10). We are doing
this so we do not take the whole I/O bandwidth. When the thread is no
longer necessary (request list is empty) it frees the appropriate
structures and exits (and can be created later later by another
filesystem).
We do not disturb regular inode allocations in any way, it just do not
care whether the inode table is, or is not zeroed. But when zeroing, we
have to skip used inodes, obviously. Also we should prevent new inode
allocations from the group, while zeroing is on the way. For that we
take write alloc_sem lock in ext4_init_inode_table() and read alloc_sem
in the ext4_claim_inode, so when we are unlucky and allocator hits the
group which is currently being zeroed, it just has to wait.
This can be suppresed using the mount option no_init_itable.
Signed-off-by: Lukas Czerner <lczerner@redhat.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2010-10-27 21:30:05 -04:00
|
|
|
|
|
|
|
|
|
2011-02-03 14:33:15 -05:00
|
|
|
|
ext4: add support for lazy inode table initialization
When the lazy_itable_init extended option is passed to mke2fs, it
considerably speeds up filesystem creation because inode tables are
not zeroed out. The fact that parts of the inode table are
uninitialized is not a problem so long as the block group descriptors,
which contain information regarding how much of the inode table has
been initialized, has not been corrupted However, if the block group
checksums are not valid, e2fsck must scan the entire inode table, and
the the old, uninitialized data could potentially cause e2fsck to
report false problems.
Hence, it is important for the inode tables to be initialized as soon
as possble. This commit adds this feature so that mke2fs can safely
use the lazy inode table initialization feature to speed up formatting
file systems.
This is done via a new new kernel thread called ext4lazyinit, which is
created on demand and destroyed, when it is no longer needed. There
is only one thread for all ext4 filesystems in the system. When the
first filesystem with inititable mount option is mounted, ext4lazyinit
thread is created, then the filesystem can register its request in the
request list.
This thread then walks through the list of requests picking up
scheduled requests and invoking ext4_init_inode_table(). Next schedule
time for the request is computed by multiplying the time it took to
zero out last inode table with wait multiplier, which can be set with
the (init_itable=n) mount option (default is 10). We are doing
this so we do not take the whole I/O bandwidth. When the thread is no
longer necessary (request list is empty) it frees the appropriate
structures and exits (and can be created later later by another
filesystem).
We do not disturb regular inode allocations in any way, it just do not
care whether the inode table is, or is not zeroed. But when zeroing, we
have to skip used inodes, obviously. Also we should prevent new inode
allocations from the group, while zeroing is on the way. For that we
take write alloc_sem lock in ext4_init_inode_table() and read alloc_sem
in the ext4_claim_inode, so when we are unlucky and allocator hits the
group which is currently being zeroed, it just has to wait.
This can be suppresed using the mount option no_init_itable.
Signed-off-by: Lukas Czerner <lczerner@redhat.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2010-10-27 21:30:05 -04:00
|
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2012-05-27 07:48:56 -04:00
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2014-10-13 03:36:16 -04:00
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2014-08-27 18:40:07 -04:00
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2012-05-27 07:48:56 -04:00
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2014-08-27 18:40:07 -04:00
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2012-05-27 07:48:56 -04:00
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2014-09-11 11:38:21 -04:00
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2012-05-27 07:48:56 -04:00
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2014-09-11 11:38:21 -04:00
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2012-05-27 07:48:56 -04:00
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2012-07-09 16:27:05 -04:00
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2015-10-17 16:18:43 -04:00
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2012-08-16 11:59:04 -04:00
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2012-07-09 16:27:05 -04:00
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2016-11-18 13:37:47 -05:00
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2012-07-09 16:27:05 -04:00
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2016-11-18 13:37:47 -05:00
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2012-07-09 16:27:05 -04:00
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2016-09-30 02:08:49 -04:00
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2012-07-09 16:27:05 -04:00
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2014-11-25 13:08:04 -05:00
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2012-07-09 16:27:05 -04:00
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2016-09-30 02:08:49 -04:00
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2014-11-25 16:27:44 -05:00
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2013-03-02 17:18:58 -05:00
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2016-09-30 02:08:49 -04:00
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2012-07-09 16:27:05 -04:00
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2015-09-23 12:44:17 -04:00
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2013-04-09 22:11:22 -04:00
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2015-09-23 12:44:17 -04:00
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2013-04-09 22:11:22 -04:00
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2013-12-08 21:11:59 -05:00
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2015-10-17 16:18:43 -04:00
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2015-09-23 12:44:17 -04:00
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2013-04-09 22:11:22 -04:00
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2014-04-20 23:45:47 -04:00
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2013-04-09 22:11:22 -04:00
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2015-09-23 12:44:17 -04:00
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2013-04-09 22:11:22 -04:00
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2015-09-23 12:44:17 -04:00
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2013-04-09 22:11:22 -04:00
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2008-07-26 16:15:44 -04:00
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2006-10-11 01:20:50 -07:00
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2010-05-16 12:00:00 -04:00
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2008-07-26 16:15:44 -04:00
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2006-10-11 01:20:53 -07:00
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2016-11-18 13:24:26 -05:00
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2006-10-11 01:20:53 -07:00
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2006-10-11 01:21:20 -07:00
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2006-10-11 01:20:50 -07:00
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2009-01-07 00:06:22 -05:00
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2010-07-27 11:56:07 -04:00
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2011-09-09 18:34:51 -04:00
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2009-01-06 14:53:26 -05:00
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2011-09-09 18:34:51 -04:00
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2006-10-11 01:21:10 -07:00
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2012-11-08 15:16:54 -05:00
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2009-01-05 22:46:26 -05:00
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ext4: add support for lazy inode table initialization
When the lazy_itable_init extended option is passed to mke2fs, it
considerably speeds up filesystem creation because inode tables are
not zeroed out. The fact that parts of the inode table are
uninitialized is not a problem so long as the block group descriptors,
which contain information regarding how much of the inode table has
been initialized, has not been corrupted However, if the block group
checksums are not valid, e2fsck must scan the entire inode table, and
the the old, uninitialized data could potentially cause e2fsck to
report false problems.
Hence, it is important for the inode tables to be initialized as soon
as possble. This commit adds this feature so that mke2fs can safely
use the lazy inode table initialization feature to speed up formatting
file systems.
This is done via a new new kernel thread called ext4lazyinit, which is
created on demand and destroyed, when it is no longer needed. There
is only one thread for all ext4 filesystems in the system. When the
first filesystem with inititable mount option is mounted, ext4lazyinit
thread is created, then the filesystem can register its request in the
request list.
This thread then walks through the list of requests picking up
scheduled requests and invoking ext4_init_inode_table(). Next schedule
time for the request is computed by multiplying the time it took to
zero out last inode table with wait multiplier, which can be set with
the (init_itable=n) mount option (default is 10). We are doing
this so we do not take the whole I/O bandwidth. When the thread is no
longer necessary (request list is empty) it frees the appropriate
structures and exits (and can be created later later by another
filesystem).
We do not disturb regular inode allocations in any way, it just do not
care whether the inode table is, or is not zeroed. But when zeroing, we
have to skip used inodes, obviously. Also we should prevent new inode
allocations from the group, while zeroing is on the way. For that we
take write alloc_sem lock in ext4_init_inode_table() and read alloc_sem
in the ext4_claim_inode, so when we are unlucky and allocator hits the
group which is currently being zeroed, it just has to wait.
This can be suppresed using the mount option no_init_itable.
Signed-off-by: Lukas Czerner <lczerner@redhat.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2010-10-27 21:30:05 -04:00
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2006-10-11 01:20:50 -07:00
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2016-11-18 13:24:26 -05:00
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2009-02-15 18:07:52 -05:00
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2016-11-18 13:24:26 -05:00
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2006-10-11 01:20:50 -07:00
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2012-05-30 22:56:46 -04:00
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2008-10-09 23:53:47 -04:00
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2007-10-16 23:26:27 -07:00
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2010-07-27 11:56:08 -04:00
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2006-10-11 01:20:50 -07:00
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2008-09-23 09:18:24 -04:00
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2015-06-25 15:02:41 -07:00
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2008-09-23 09:18:24 -04:00
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2012-11-08 15:16:54 -05:00
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2010-07-27 11:56:07 -04:00
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2006-10-11 01:20:53 -07:00
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2006-10-11 01:20:50 -07:00
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2009-06-04 17:36:36 -04:00
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2006-10-11 01:20:50 -07:00
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2006-10-11 01:20:53 -07:00
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2006-10-11 01:20:50 -07:00
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2006-10-11 01:20:53 -07:00
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2006-10-11 01:21:20 -07:00
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2006-10-11 01:20:50 -07:00
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2006-10-11 01:21:20 -07:00
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2006-10-11 01:20:50 -07:00
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2014-09-04 22:36:15 -04:00
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2009-06-04 17:36:36 -04:00
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2006-10-11 01:20:50 -07:00
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2006-10-11 01:20:53 -07:00
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2006-10-11 01:20:50 -07:00
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2012-05-28 17:47:52 -04:00
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2006-10-11 01:20:50 -07:00
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2006-10-11 01:20:53 -07:00
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2009-02-28 19:39:58 -05:00
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2006-10-11 01:20:50 -07:00
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2012-04-29 18:45:10 -04:00
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2015-10-17 16:18:43 -04:00
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2015-01-02 15:31:14 -05:00
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2012-04-29 18:45:10 -04:00
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2012-04-29 18:25:10 -04:00
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2012-04-29 18:27:10 -04:00
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2015-10-17 16:18:43 -04:00
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2012-04-29 18:27:10 -04:00
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2012-04-29 18:29:10 -04:00
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2015-10-17 16:16:04 -04:00
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2012-04-29 18:29:10 -04:00
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2015-10-17 16:18:43 -04:00
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2015-10-17 16:16:02 -04:00
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2012-04-29 18:29:10 -04:00
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2006-10-11 01:20:50 -07:00
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2010-12-15 20:26:48 -05:00
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2006-10-11 01:20:53 -07:00
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2010-12-15 20:26:48 -05:00
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2012-03-02 00:03:21 -05:00
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2010-12-15 20:26:48 -05:00
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2006-10-11 01:20:53 -07:00
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2010-12-15 20:26:48 -05:00
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2011-02-23 17:51:51 -05:00
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2008-10-10 20:02:48 -04:00
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2011-02-23 17:51:51 -05:00
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2007-02-10 01:46:13 -08:00
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2014-10-30 10:53:16 -04:00
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2006-10-11 01:20:53 -07:00
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2010-12-15 20:26:48 -05:00
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2006-10-11 01:20:53 -07:00
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2010-12-15 20:26:48 -05:00
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2006-10-11 01:20:53 -07:00
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2010-12-15 20:26:48 -05:00
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2006-10-11 01:20:53 -07:00
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2010-12-15 20:26:48 -05:00
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2008-01-28 23:58:26 -05:00
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2010-12-15 20:26:48 -05:00
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2008-01-28 23:58:26 -05:00
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2010-12-15 20:26:48 -05:00
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2014-09-01 21:34:09 -04:00
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2010-08-01 23:14:20 -04:00
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2010-12-15 20:26:48 -05:00
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2006-10-11 01:20:50 -07:00
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2012-02-07 15:41:49 -08:00
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2009-01-03 20:27:38 -05:00
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2006-10-11 01:20:50 -07:00
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2010-08-01 23:14:20 -04:00
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2010-12-15 20:26:48 -05:00
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2006-10-11 01:20:50 -07:00
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2008-07-11 19:27:31 -04:00
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2012-09-17 22:54:36 -04:00
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2010-08-01 23:14:20 -04:00
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2010-12-15 20:26:48 -05:00
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2008-07-11 19:27:31 -04:00
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2011-05-20 13:55:16 -04:00
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2016-11-18 13:24:26 -05:00
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2010-08-01 23:14:20 -04:00
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2012-03-04 19:27:31 -05:00
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2009-01-05 22:46:26 -05:00
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2012-02-20 17:53:04 -05:00
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2006-10-11 01:20:50 -07:00
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2011-09-03 18:22:38 -04:00
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2013-08-08 23:02:24 -04:00
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2011-09-03 18:22:38 -04:00
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2015-02-16 15:59:38 -08:00
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ext4: do not perform data journaling when data is encrypted
commit 73b92a2a5e97d17cc4d5c4fe9d724d3273fb6fd2 upstream.
Currently data journalling is incompatible with encryption: enabling both
at the same time has never been supported by design, and would result in
unpredictable behavior. However, users are not precluded from turning on
both features simultaneously. This change programmatically replaces data
journaling for encrypted regular files with ordered data journaling mode.
Background:
Journaling encrypted data has not been supported because it operates on
buffer heads of the page in the page cache. Namely, when the commit
happens, which could be up to five seconds after caching, the commit
thread uses the buffer heads attached to the page to copy the contents of
the page to the journal. With encryption, it would have been required to
keep the bounce buffer with ciphertext for up to the aforementioned five
seconds, since the page cache can only hold plaintext and could not be
used for journaling. Alternatively, it would be required to setup the
journal to initiate a callback at the commit time to perform deferred
encryption - in this case, not only would the data have to be written
twice, but it would also have to be encrypted twice. This level of
complexity was not justified for a mode that in practice is very rarely
used because of the overhead from the data journalling.
Solution:
If data=journaled has been set as a mount option for a filesystem, or if
journaling is enabled on a regular file, do not perform journaling if the
file is also encrypted, instead fall back to the data=ordered mode for the
file.
Rationale:
The intent is to allow seamless and proper filesystem operation when
journaling and encryption have both been enabled, and have these two
conflicting features gracefully resolved by the filesystem.
Fixes: 4461471107b7
Signed-off-by: Sergey Karamov <skaramov@google.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-12-10 17:54:58 -05:00
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2011-09-03 18:22:38 -04:00
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2015-07-21 23:51:26 -04:00
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2011-09-03 18:22:38 -04:00
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2006-10-11 01:20:50 -07:00
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2010-02-24 11:35:32 -05:00
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2006-10-11 01:20:50 -07:00
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2006-10-11 01:20:53 -07:00
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2015-10-17 16:18:43 -04:00
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2009-06-04 17:36:36 -04:00
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2008-02-10 01:11:44 -05:00
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2014-03-24 14:09:06 -04:00
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2015-10-17 16:18:43 -04:00
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2014-03-24 14:09:06 -04:00
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2011-04-18 17:29:14 -04:00
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2006-10-11 01:20:50 -07:00
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2009-08-18 00:20:23 -04:00
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2006-10-11 01:20:50 -07:00
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2009-08-18 00:20:23 -04:00
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2012-12-20 00:07:18 -05:00
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2006-10-11 01:20:53 -07:00
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2009-06-04 17:36:36 -04:00
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2016-11-18 13:00:24 -05:00
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2006-10-11 01:20:50 -07:00
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2016-07-05 20:01:52 -04:00
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2015-02-16 15:59:38 -08:00
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2016-05-10 10:23:54 -06:00
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2015-02-16 15:59:38 -08:00
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2015-10-17 16:18:43 -04:00
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2015-04-16 01:56:00 -04:00
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2006-10-11 01:20:50 -07:00
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2008-01-28 23:58:27 -05:00
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2009-06-04 17:36:36 -04:00
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2008-01-28 23:58:27 -05:00
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2006-10-11 01:20:50 -07:00
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2008-07-26 16:15:44 -04:00
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2006-10-11 01:21:20 -07:00
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2014-09-04 22:36:15 -04:00
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2006-10-11 01:20:50 -07:00
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2009-06-04 17:36:36 -04:00
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2006-10-11 01:20:50 -07:00
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2012-05-28 17:47:52 -04:00
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2006-10-11 01:20:50 -07:00
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2006-10-11 01:20:53 -07:00
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2009-06-04 17:36:36 -04:00
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2006-10-11 01:20:50 -07:00
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2015-10-17 16:18:43 -04:00
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2008-10-16 22:50:48 -04:00
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2006-10-11 01:20:50 -07:00
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2006-10-11 01:20:53 -07:00
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2006-10-11 01:20:50 -07:00
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2006-10-11 01:20:53 -07:00
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2007-07-18 09:11:02 -04:00
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2006-10-11 01:20:50 -07:00
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2009-06-04 17:36:36 -04:00
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2008-07-26 16:15:44 -04:00
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2006-10-11 01:20:50 -07:00
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2007-07-18 09:15:20 -04:00
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2006-10-11 01:20:50 -07:00
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2009-06-03 17:59:28 -04:00
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2006-10-11 01:21:14 -07:00
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2015-10-17 16:18:43 -04:00
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2006-10-11 01:21:15 -07:00
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2006-10-11 01:21:14 -07:00
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2007-10-16 23:27:14 -07:00
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2009-06-04 17:36:36 -04:00
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2006-10-11 01:21:14 -07:00
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2009-06-03 17:59:28 -04:00
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2006-10-11 01:20:50 -07:00
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2009-06-03 17:59:28 -04:00
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2006-10-11 01:20:53 -07:00
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2006-10-11 01:20:50 -07:00
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2006-10-11 01:20:53 -07:00
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2016-11-18 13:28:30 -05:00
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2006-10-11 01:20:50 -07:00
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2006-10-11 01:21:14 -07:00
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2006-10-11 01:20:50 -07:00
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2007-10-16 23:26:25 -07:00
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2009-06-03 17:59:28 -04:00
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2008-07-26 16:15:44 -04:00
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2006-10-11 01:20:50 -07:00
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2015-10-17 16:18:43 -04:00
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2014-02-12 12:16:04 -05:00
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2008-10-28 13:21:44 -04:00
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2014-02-12 12:16:04 -05:00
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2008-10-28 13:21:44 -04:00
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2014-02-12 12:16:04 -05:00
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2008-10-28 13:21:44 -04:00
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2014-02-12 12:16:04 -05:00
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2008-10-28 13:21:44 -04:00
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2006-10-11 01:20:50 -07:00
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2011-09-09 18:34:51 -04:00
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2015-10-17 16:18:43 -04:00
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2011-09-09 18:34:51 -04:00
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2016-11-18 13:00:24 -05:00
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2011-09-09 18:34:51 -04:00
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2006-10-11 01:20:50 -07:00
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2011-09-09 18:34:51 -04:00
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2013-07-05 23:11:16 -04:00
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2009-08-17 23:48:51 -04:00
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2010-11-19 09:56:44 -05:00
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2010-07-22 15:03:41 -07:00
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2010-11-19 09:56:44 -05:00
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2009-06-04 17:36:36 -04:00
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2009-08-17 23:48:51 -04:00
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2006-10-11 01:20:50 -07:00
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2009-06-19 08:08:50 +02:00
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2006-10-11 01:20:50 -07:00
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2006-10-11 01:20:53 -07:00
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ext4: fix oops on corrupted ext4 mount
When mounting an ext4 filesystem with corrupted s_first_data_block, things
can go very wrong and oops.
Because blocks_count in ext4_fill_super is a u64, and we must use do_div,
the calculation of db_count is done differently than on ext4. If
first_data_block is corrupted such that it is larger than ext4_blocks_count,
for example, then the intermediate blocks_count value may go negative,
but sign-extend to a very large value:
blocks_count = (ext4_blocks_count(es) -
le32_to_cpu(es->s_first_data_block) +
EXT4_BLOCKS_PER_GROUP(sb) - 1);
This is then assigned to s_groups_count which is an unsigned long:
sbi->s_groups_count = blocks_count;
This may result in a value of 0xFFFFFFFF which is then used to compute
db_count:
db_count = (sbi->s_groups_count + EXT4_DESC_PER_BLOCK(sb) - 1) /
EXT4_DESC_PER_BLOCK(sb);
and in this case db_count will wind up as 0 because the addition overflows
32 bits. This in turn causes the kmalloc for group_desc to be of 0 size:
sbi->s_group_desc = kmalloc(db_count * sizeof (struct buffer_head *),
GFP_KERNEL);
and eventually in ext4_check_descriptors, dereferencing
sbi->s_group_desc[desc_block] will result in a NULL pointer dereference.
The simplest test seems to be to sanity check s_first_data_block,
EXT4_BLOCKS_PER_GROUP, and ext4_blocks_count values to be sure
their combination won't result in a bad intermediate value for
blocks_count. We could just check for db_count == 0, but
catching it at the root cause seems like it provides more info.
Signed-off-by: Eric Sandeen <sandeen@redhat.com>
Reviewed-by: Mingming Cao <cmm@us.ibm.com>
2008-01-28 23:58:27 -05:00
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2009-04-07 14:07:47 -04:00
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2009-06-04 17:36:36 -04:00
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2009-04-07 14:07:47 -04:00
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2009-06-03 17:59:28 -04:00
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2011-12-18 16:13:58 -05:00
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2009-06-04 17:36:36 -04:00
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ext4: fix oops on corrupted ext4 mount
When mounting an ext4 filesystem with corrupted s_first_data_block, things
can go very wrong and oops.
Because blocks_count in ext4_fill_super is a u64, and we must use do_div,
the calculation of db_count is done differently than on ext4. If
first_data_block is corrupted such that it is larger than ext4_blocks_count,
for example, then the intermediate blocks_count value may go negative,
but sign-extend to a very large value:
blocks_count = (ext4_blocks_count(es) -
le32_to_cpu(es->s_first_data_block) +
EXT4_BLOCKS_PER_GROUP(sb) - 1);
This is then assigned to s_groups_count which is an unsigned long:
sbi->s_groups_count = blocks_count;
This may result in a value of 0xFFFFFFFF which is then used to compute
db_count:
db_count = (sbi->s_groups_count + EXT4_DESC_PER_BLOCK(sb) - 1) /
EXT4_DESC_PER_BLOCK(sb);
and in this case db_count will wind up as 0 because the addition overflows
32 bits. This in turn causes the kmalloc for group_desc to be of 0 size:
sbi->s_group_desc = kmalloc(db_count * sizeof (struct buffer_head *),
GFP_KERNEL);
and eventually in ext4_check_descriptors, dereferencing
sbi->s_group_desc[desc_block] will result in a NULL pointer dereference.
The simplest test seems to be to sanity check s_first_data_block,
EXT4_BLOCKS_PER_GROUP, and ext4_blocks_count values to be sure
their combination won't result in a bad intermediate value for
blocks_count. We could just check for db_count == 0, but
catching it at the root cause seems like it provides more info.
Signed-off-by: Eric Sandeen <sandeen@redhat.com>
Reviewed-by: Mingming Cao <cmm@us.ibm.com>
2008-01-28 23:58:27 -05:00
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2006-10-11 01:21:10 -07:00
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2009-01-06 14:53:26 -05:00
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2009-06-04 17:36:36 -04:00
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2009-01-06 14:53:26 -05:00
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2009-06-04 17:36:36 -04:00
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2009-01-06 14:53:26 -05:00
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2006-10-11 01:21:10 -07:00
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ext4: limit block allocations for indirect-block files to < 2^32
Today, the ext4 allocator will happily allocate blocks past
2^32 for indirect-block files, which results in the block
numbers getting truncated, and corruption ensues.
This patch limits such allocations to < 2^32, and adds
BUG_ONs if we do get blocks larger than that.
This should address RH Bug 519471, ext4 bitmap allocator
must limit blocks to < 2^32
* ext4_find_goal() is modified to choose a goal < UINT_MAX,
so that our starting point is in an acceptable range.
* ext4_xattr_block_set() is modified such that the goal block
is < UINT_MAX, as above.
* ext4_mb_regular_allocator() is modified so that the group
search does not continue into groups which are too high
* ext4_mb_use_preallocated() has a check that we don't use
preallocated space which is too far out
* ext4_alloc_blocks() and ext4_xattr_block_set() add some BUG_ONs
No attempt has been made to limit inode locations to < 2^32,
so we may wind up with blocks far from their inodes. Doing
this much already will lead to some odd ENOSPC issues when the
"lower 32" gets full, and further restricting inodes could
make that even weirder.
For high inodes, choosing a goal of the original, % UINT_MAX,
may be a bit odd, but then we're in an odd situation anyway,
and I don't know of a better heuristic.
Signed-off-by: Eric Sandeen <sandeen@redhat.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2009-09-16 14:45:10 -04:00
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2006-10-11 01:20:53 -07:00
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ext4: validate s_first_meta_bg at mount time
commit 3a4b77cd47bb837b8557595ec7425f281f2ca1fe upstream.
Ralf Spenneberg reported that he hit a kernel crash when mounting a
modified ext4 image. And it turns out that kernel crashed when
calculating fs overhead (ext4_calculate_overhead()), this is because
the image has very large s_first_meta_bg (debug code shows it's
842150400), and ext4 overruns the memory in count_overhead() when
setting bitmap buffer, which is PAGE_SIZE.
ext4_calculate_overhead():
buf = get_zeroed_page(GFP_NOFS); <=== PAGE_SIZE buffer
blks = count_overhead(sb, i, buf);
count_overhead():
for (j = ext4_bg_num_gdb(sb, grp); j > 0; j--) { <=== j = 842150400
ext4_set_bit(EXT4_B2C(sbi, s++), buf); <=== buffer overrun
count++;
}
This can be reproduced easily for me by this script:
#!/bin/bash
rm -f fs.img
mkdir -p /mnt/ext4
fallocate -l 16M fs.img
mke2fs -t ext4 -O bigalloc,meta_bg,^resize_inode -F fs.img
debugfs -w -R "ssv first_meta_bg 842150400" fs.img
mount -o loop fs.img /mnt/ext4
Fix it by validating s_first_meta_bg first at mount time, and
refusing to mount if its value exceeds the largest possible meta_bg
number.
Reported-by: Ralf Spenneberg <ralf@os-t.de>
Signed-off-by: Eryu Guan <guaneryu@gmail.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Reviewed-by: Andreas Dilger <adilger@dilger.ca>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-12-01 15:08:37 -05:00
|
|
|
|
2017-02-15 01:26:39 -05:00
|
|
|
|
ext4: validate s_first_meta_bg at mount time
commit 3a4b77cd47bb837b8557595ec7425f281f2ca1fe upstream.
Ralf Spenneberg reported that he hit a kernel crash when mounting a
modified ext4 image. And it turns out that kernel crashed when
calculating fs overhead (ext4_calculate_overhead()), this is because
the image has very large s_first_meta_bg (debug code shows it's
842150400), and ext4 overruns the memory in count_overhead() when
setting bitmap buffer, which is PAGE_SIZE.
ext4_calculate_overhead():
buf = get_zeroed_page(GFP_NOFS); <=== PAGE_SIZE buffer
blks = count_overhead(sb, i, buf);
count_overhead():
for (j = ext4_bg_num_gdb(sb, grp); j > 0; j--) { <=== j = 842150400
ext4_set_bit(EXT4_B2C(sbi, s++), buf); <=== buffer overrun
count++;
}
This can be reproduced easily for me by this script:
#!/bin/bash
rm -f fs.img
mkdir -p /mnt/ext4
fallocate -l 16M fs.img
mke2fs -t ext4 -O bigalloc,meta_bg,^resize_inode -F fs.img
debugfs -w -R "ssv first_meta_bg 842150400" fs.img
mount -o loop fs.img /mnt/ext4
Fix it by validating s_first_meta_bg first at mount time, and
refusing to mount if its value exceeds the largest possible meta_bg
number.
Reported-by: Ralf Spenneberg <ralf@os-t.de>
Signed-off-by: Eryu Guan <guaneryu@gmail.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Reviewed-by: Andreas Dilger <adilger@dilger.ca>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-12-01 15:08:37 -05:00
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2011-08-01 08:45:38 -04:00
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2006-10-11 01:20:50 -07:00
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2009-06-04 17:36:36 -04:00
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2012-05-28 17:49:54 -04:00
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2006-10-11 01:20:50 -07:00
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2009-02-15 18:07:52 -05:00
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2006-10-11 01:20:50 -07:00
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2006-10-11 01:21:20 -07:00
|
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2014-09-04 22:36:15 -04:00
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2006-10-11 01:20:50 -07:00
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2009-06-04 17:36:36 -04:00
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2006-10-11 01:20:50 -07:00
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2016-08-01 00:51:02 -04:00
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2009-06-04 17:36:36 -04:00
|
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2015-10-17 16:16:04 -04:00
|
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2014-07-11 13:55:40 -04:00
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2006-10-11 01:20:50 -07:00
|
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2008-07-11 19:27:31 -04:00
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2014-07-11 13:55:40 -04:00
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2006-10-11 01:20:50 -07:00
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2015-01-26 14:42:31 -05:00
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2011-04-05 19:55:28 -04:00
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2013-04-03 22:10:52 -04:00
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2014-09-01 22:26:49 -04:00
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2010-11-03 12:03:21 -04:00
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2008-01-29 00:19:52 -05:00
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2012-08-17 09:54:17 -04:00
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2008-01-29 00:19:52 -05:00
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2014-07-11 13:55:40 -04:00
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2014-09-18 17:12:30 -04:00
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2006-10-11 01:20:53 -07:00
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2016-07-10 14:01:03 -04:00
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2006-10-11 01:20:50 -07:00
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2006-10-11 01:20:53 -07:00
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2015-10-17 16:18:43 -04:00
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2014-10-08 18:26:54 +02:00
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2013-03-02 17:57:08 -05:00
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2016-01-08 16:01:22 -05:00
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2006-10-11 01:20:50 -07:00
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2011-01-29 18:43:40 +05:30
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2006-10-11 01:20:50 -07:00
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2009-04-25 22:54:04 -04:00
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2006-10-11 01:20:50 -07:00
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2015-10-17 16:18:43 -04:00
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2006-10-11 01:20:50 -07:00
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2015-10-17 16:18:43 -04:00
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2011-05-24 18:31:25 -04:00
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2014-10-30 10:53:16 -04:00
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2011-05-24 18:31:25 -04:00
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2006-10-11 01:20:50 -07:00
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2015-10-17 16:18:43 -04:00
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2017-02-05 01:26:48 -05:00
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2014-10-30 10:53:16 -04:00
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2009-01-07 00:06:22 -05:00
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2015-10-17 16:18:43 -04:00
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2009-06-04 17:36:36 -04:00
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2010-03-04 16:14:02 -05:00
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2006-10-11 01:20:50 -07:00
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ext4: do not allow journal_opts for fs w/o journal
It is appeared that we can pass journal related mount options and such options
be shown in /proc/mounts
Example:
#mkfs.ext4 -F /dev/vdb
#tune2fs -O ^has_journal /dev/vdb
#mount /dev/vdb /mnt/ -ocommit=20,journal_async_commit
#cat /proc/mounts | grep /mnt
/dev/vdb /mnt ext4 rw,relatime,journal_checksum,journal_async_commit,commit=20,data=ordered 0 0
But options:"journal_checksum,journal_async_commit,commit=20,data=ordered" has
nothing with reality because there is no journal at all.
This patch disallow following options for journalless configurations:
- journal_checksum
- journal_async_commit
- commit=%ld
- data={writeback,ordered,journal}
Signed-off-by: Dmitry Monakhov <dmonakhov@openvz.org>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Reviewed-by: Andreas Dilger <adilger@dilger.ca>
2015-10-18 23:50:26 -04:00
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2010-12-15 20:26:48 -05:00
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2009-01-07 00:06:22 -05:00
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2006-10-11 01:20:50 -07:00
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2015-10-17 16:18:43 -04:00
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2007-07-18 08:37:25 -04:00
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2009-06-04 17:36:36 -04:00
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2010-03-04 16:14:02 -05:00
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2007-07-18 08:37:25 -04:00
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2012-05-27 07:48:56 -04:00
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2009-11-02 10:15:27 -08:00
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2008-01-28 23:58:27 -05:00
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2006-10-11 01:20:50 -07:00
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2006-10-11 01:21:24 -07:00
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2006-10-11 01:21:01 -07:00
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2010-12-15 20:26:48 -05:00
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2006-10-11 01:20:50 -07:00
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2010-12-15 20:26:48 -05:00
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2006-10-11 01:20:50 -07:00
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2006-10-11 01:20:53 -07:00
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2006-10-11 01:21:01 -07:00
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2009-06-04 17:36:36 -04:00
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2010-03-04 16:14:02 -05:00
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2006-10-11 01:20:50 -07:00
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2009-01-05 22:46:26 -05:00
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2006-10-11 01:20:50 -07:00
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2012-02-20 17:53:02 -05:00
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2010-11-03 12:03:21 -04:00
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2016-02-22 22:41:05 -05:00
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2014-03-18 19:24:49 -04:00
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2015-10-17 16:18:43 -04:00
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mm, fs: get rid of PAGE_CACHE_* and page_cache_{get,release} macros
PAGE_CACHE_{SIZE,SHIFT,MASK,ALIGN} macros were introduced *long* time
ago with promise that one day it will be possible to implement page
cache with bigger chunks than PAGE_SIZE.
This promise never materialized. And unlikely will.
We have many places where PAGE_CACHE_SIZE assumed to be equal to
PAGE_SIZE. And it's constant source of confusion on whether
PAGE_CACHE_* or PAGE_* constant should be used in a particular case,
especially on the border between fs and mm.
Global switching to PAGE_CACHE_SIZE != PAGE_SIZE would cause to much
breakage to be doable.
Let's stop pretending that pages in page cache are special. They are
not.
The changes are pretty straight-forward:
- <foo> << (PAGE_CACHE_SHIFT - PAGE_SHIFT) -> <foo>;
- <foo> >> (PAGE_CACHE_SHIFT - PAGE_SHIFT) -> <foo>;
- PAGE_CACHE_{SIZE,SHIFT,MASK,ALIGN} -> PAGE_{SIZE,SHIFT,MASK,ALIGN};
- page_cache_get() -> get_page();
- page_cache_release() -> put_page();
This patch contains automated changes generated with coccinelle using
script below. For some reason, coccinelle doesn't patch header files.
I've called spatch for them manually.
The only adjustment after coccinelle is revert of changes to
PAGE_CAHCE_ALIGN definition: we are going to drop it later.
There are few places in the code where coccinelle didn't reach. I'll
fix them manually in a separate patch. Comments and documentation also
will be addressed with the separate patch.
virtual patch
@@
expression E;
@@
- E << (PAGE_CACHE_SHIFT - PAGE_SHIFT)
+ E
@@
expression E;
@@
- E >> (PAGE_CACHE_SHIFT - PAGE_SHIFT)
+ E
@@
@@
- PAGE_CACHE_SHIFT
+ PAGE_SHIFT
@@
@@
- PAGE_CACHE_SIZE
+ PAGE_SIZE
@@
@@
- PAGE_CACHE_MASK
+ PAGE_MASK
@@
expression E;
@@
- PAGE_CACHE_ALIGN(E)
+ PAGE_ALIGN(E)
@@
expression E;
@@
- page_cache_get(E)
+ get_page(E)
@@
expression E;
@@
- page_cache_release(E)
+ put_page(E)
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Acked-by: Michal Hocko <mhocko@suse.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-04-01 15:29:47 +03:00
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2015-06-12 23:44:33 -04:00
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2015-10-17 16:18:43 -04:00
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2015-04-16 01:56:00 -04:00
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2012-07-09 16:27:05 -04:00
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2012-11-08 15:16:54 -05:00
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2012-07-09 16:27:05 -04:00
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2011-02-01 11:42:42 +01:00
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2013-06-04 14:21:02 -04:00
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2012-11-08 15:16:54 -05:00
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2013-06-04 14:21:02 -04:00
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2006-10-11 01:20:50 -07:00
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2006-10-11 01:21:01 -07:00
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2006-10-11 01:20:50 -07:00
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2008-02-07 00:15:37 -08:00
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2009-06-04 17:36:36 -04:00
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2008-02-07 00:15:37 -08:00
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2011-02-27 20:42:06 -05:00
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2006-10-11 01:20:50 -07:00
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2009-06-04 17:36:36 -04:00
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2012-01-09 15:53:24 -05:00
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2006-10-11 01:20:50 -07:00
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2012-01-08 22:15:13 -05:00
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2008-02-07 00:15:37 -08:00
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2009-06-04 17:36:36 -04:00
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2008-02-07 00:15:37 -08:00
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2006-10-11 01:20:50 -07:00
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2012-05-28 14:17:25 -04:00
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2007-07-18 09:15:20 -04:00
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2015-10-17 16:18:43 -04:00
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2007-07-18 09:15:20 -04:00
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2009-06-04 17:36:36 -04:00
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2007-07-18 09:15:20 -04:00
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2015-09-23 12:44:17 -04:00
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2013-04-09 22:11:22 -04:00
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2009-05-17 15:38:01 -04:00
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2009-06-04 17:36:36 -04:00
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2010-05-16 13:00:00 -04:00
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2014-07-11 13:55:40 -04:00
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2011-10-06 12:10:11 -04:00
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2008-10-10 20:07:20 -04:00
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2014-07-15 06:01:38 -04:00
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2014-09-08 09:51:29 +09:00
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2014-07-15 06:01:38 -04:00
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2014-09-08 09:51:29 +09:00
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2014-07-15 06:01:38 -04:00
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2014-09-08 09:51:29 +09:00
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2014-07-15 06:01:38 -04:00
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2014-09-08 09:51:29 +09:00
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2016-04-25 23:22:35 -04:00
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2014-07-15 06:01:38 -04:00
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2015-10-17 16:18:43 -04:00
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2014-07-15 06:01:38 -04:00
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ext4: add support for lazy inode table initialization
When the lazy_itable_init extended option is passed to mke2fs, it
considerably speeds up filesystem creation because inode tables are
not zeroed out. The fact that parts of the inode table are
uninitialized is not a problem so long as the block group descriptors,
which contain information regarding how much of the inode table has
been initialized, has not been corrupted However, if the block group
checksums are not valid, e2fsck must scan the entire inode table, and
the the old, uninitialized data could potentially cause e2fsck to
report false problems.
Hence, it is important for the inode tables to be initialized as soon
as possble. This commit adds this feature so that mke2fs can safely
use the lazy inode table initialization feature to speed up formatting
file systems.
This is done via a new new kernel thread called ext4lazyinit, which is
created on demand and destroyed, when it is no longer needed. There
is only one thread for all ext4 filesystems in the system. When the
first filesystem with inititable mount option is mounted, ext4lazyinit
thread is created, then the filesystem can register its request in the
request list.
This thread then walks through the list of requests picking up
scheduled requests and invoking ext4_init_inode_table(). Next schedule
time for the request is computed by multiplying the time it took to
zero out last inode table with wait multiplier, which can be set with
the (init_itable=n) mount option (default is 10). We are doing
this so we do not take the whole I/O bandwidth. When the thread is no
longer necessary (request list is empty) it frees the appropriate
structures and exits (and can be created later later by another
filesystem).
We do not disturb regular inode allocations in any way, it just do not
care whether the inode table is, or is not zeroed. But when zeroing, we
have to skip used inodes, obviously. Also we should prevent new inode
allocations from the group, while zeroing is on the way. For that we
take write alloc_sem lock in ext4_init_inode_table() and read alloc_sem
in the ext4_claim_inode, so when we are unlucky and allocator hits the
group which is currently being zeroed, it just has to wait.
This can be suppresed using the mount option no_init_itable.
Signed-off-by: Lukas Czerner <lczerner@redhat.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2010-10-27 21:30:05 -04:00
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2011-10-06 12:10:11 -04:00
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|
ext4: add support for lazy inode table initialization
When the lazy_itable_init extended option is passed to mke2fs, it
considerably speeds up filesystem creation because inode tables are
not zeroed out. The fact that parts of the inode table are
uninitialized is not a problem so long as the block group descriptors,
which contain information regarding how much of the inode table has
been initialized, has not been corrupted However, if the block group
checksums are not valid, e2fsck must scan the entire inode table, and
the the old, uninitialized data could potentially cause e2fsck to
report false problems.
Hence, it is important for the inode tables to be initialized as soon
as possble. This commit adds this feature so that mke2fs can safely
use the lazy inode table initialization feature to speed up formatting
file systems.
This is done via a new new kernel thread called ext4lazyinit, which is
created on demand and destroyed, when it is no longer needed. There
is only one thread for all ext4 filesystems in the system. When the
first filesystem with inititable mount option is mounted, ext4lazyinit
thread is created, then the filesystem can register its request in the
request list.
This thread then walks through the list of requests picking up
scheduled requests and invoking ext4_init_inode_table(). Next schedule
time for the request is computed by multiplying the time it took to
zero out last inode table with wait multiplier, which can be set with
the (init_itable=n) mount option (default is 10). We are doing
this so we do not take the whole I/O bandwidth. When the thread is no
longer necessary (request list is empty) it frees the appropriate
structures and exits (and can be created later later by another
filesystem).
We do not disturb regular inode allocations in any way, it just do not
care whether the inode table is, or is not zeroed. But when zeroing, we
have to skip used inodes, obviously. Also we should prevent new inode
allocations from the group, while zeroing is on the way. For that we
take write alloc_sem lock in ext4_init_inode_table() and read alloc_sem
in the ext4_claim_inode, so when we are unlucky and allocator hits the
group which is currently being zeroed, it just has to wait.
This can be suppresed using the mount option no_init_itable.
Signed-off-by: Lukas Czerner <lczerner@redhat.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2010-10-27 21:30:05 -04:00
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2015-09-23 12:44:17 -04:00
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2011-10-06 12:10:11 -04:00
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2009-03-31 09:10:09 -04:00
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2013-03-02 18:22:38 -05:00
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2015-10-17 16:18:43 -04:00
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2013-03-02 18:22:38 -05:00
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2006-10-11 01:20:53 -07:00
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2009-01-07 00:06:22 -05:00
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2009-06-04 17:36:36 -04:00
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2009-01-07 00:06:22 -05:00
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2012-11-08 13:28:29 -05:00
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2015-08-15 14:59:44 -04:00
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2016-11-18 13:24:26 -05:00
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2015-08-15 14:59:44 -04:00
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2006-10-11 01:20:50 -07:00
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2010-07-27 11:56:04 -04:00
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2006-10-11 01:20:50 -07:00
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2013-10-17 21:11:01 -04:00
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2010-05-16 12:00:00 -04:00
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2016-07-10 14:01:03 -04:00
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2006-10-11 01:20:50 -07:00
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2006-10-11 01:20:53 -07:00
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2006-10-11 01:20:50 -07:00
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2009-06-04 17:36:36 -04:00
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2006-10-11 01:20:50 -07:00
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2013-01-24 23:24:54 -05:00
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2015-09-23 12:46:17 -04:00
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2013-01-24 23:24:54 -05:00
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2011-10-06 12:10:11 -04:00
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2014-07-11 13:55:40 -04:00
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2014-07-15 06:01:38 -04:00
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2014-11-20 12:19:11 -05:00
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2014-07-15 06:01:38 -04:00
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ext4: initialize multi-block allocator before checking block descriptors
With EXT4FS_DEBUG ext4_count_free_clusters() will call
ext4_read_block_bitmap() without s_group_info initialized, so we need to
initialize multi-block allocator before.
And dependencies that must be solved, to allow this:
- multi-block allocator needs in group descriptors
- need to install s_op before initializing multi-block allocator,
because in ext4_mb_init_backend() new inode is created.
- initialize number of group desc blocks (s_gdb_count) otherwise
number of clusters returned by ext4_free_clusters_after_init() is not correct.
(see ext4_bg_num_gdb_nometa())
Here is the stack backtrace:
(gdb) bt
#0 ext4_get_group_info (group=0, sb=0xffff880079a10000) at ext4.h:2430
#1 ext4_validate_block_bitmap (sb=sb@entry=0xffff880079a10000,
desc=desc@entry=0xffff880056510000, block_group=block_group@entry=0,
bh=bh@entry=0xffff88007bf2b2d8) at balloc.c:358
#2 0xffffffff81232202 in ext4_wait_block_bitmap (sb=sb@entry=0xffff880079a10000,
block_group=block_group@entry=0,
bh=bh@entry=0xffff88007bf2b2d8) at balloc.c:476
#3 0xffffffff81232eaf in ext4_read_block_bitmap (sb=sb@entry=0xffff880079a10000,
block_group=block_group@entry=0) at balloc.c:489
#4 0xffffffff81232fc0 in ext4_count_free_clusters (sb=sb@entry=0xffff880079a10000) at balloc.c:665
#5 0xffffffff81259ffa in ext4_check_descriptors (first_not_zeroed=<synthetic pointer>,
sb=0xffff880079a10000) at super.c:2143
#6 ext4_fill_super (sb=sb@entry=0xffff880079a10000, data=<optimized out>,
data@entry=0x0 <irq_stack_union>, silent=silent@entry=0) at super.c:3851
...
Signed-off-by: Azat Khuzhin <a3at.mail@gmail.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2014-04-07 10:54:20 -04:00
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2014-07-11 13:55:40 -04:00
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2012-01-09 15:53:24 -05:00
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2011-02-27 20:42:06 -05:00
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2012-01-09 15:53:24 -05:00
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2009-06-04 17:36:36 -04:00
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2013-06-04 14:21:02 -04:00
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2009-09-28 15:48:41 -04:00
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2016-02-22 11:50:13 -05:00
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2009-01-07 00:06:22 -05:00
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2014-10-30 10:53:16 -04:00
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2013-07-01 08:12:37 -04:00
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2014-09-01 22:26:49 -04:00
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2013-12-08 20:52:31 -05:00
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2011-05-24 18:31:25 -04:00
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2006-10-11 01:20:50 -07:00
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2014-11-20 12:19:11 -05:00
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2006-10-11 01:20:50 -07:00
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2012-04-29 18:27:10 -04:00
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2006-10-11 01:20:50 -07:00
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2014-09-11 11:15:15 -04:00
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2006-10-11 01:20:50 -07:00
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2006-10-11 01:20:53 -07:00
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2006-10-11 01:20:50 -07:00
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2009-05-17 23:52:44 -04:00
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2016-11-18 13:24:26 -05:00
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2006-10-11 01:20:50 -07:00
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2010-05-16 12:00:00 -04:00
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2012-11-08 15:16:54 -05:00
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2006-10-11 01:20:50 -07:00
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2006-10-11 01:20:53 -07:00
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2006-10-11 01:20:50 -07:00
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2006-10-11 01:20:53 -07:00
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2006-10-11 01:20:50 -07:00
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2009-01-03 20:27:38 -05:00
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2006-10-11 01:20:50 -07:00
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2010-08-03 21:35:12 -04:00
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2006-10-11 01:20:50 -07:00
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2006-10-11 01:21:01 -07:00
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2006-10-11 01:20:50 -07:00
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2006-10-11 01:21:01 -07:00
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2008-10-10 22:12:43 -04:00
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2010-08-03 21:35:12 -04:00
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2006-10-11 01:20:50 -07:00
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2016-09-30 02:05:09 -04:00
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2006-10-11 01:20:50 -07:00
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2016-09-30 02:05:09 -04:00
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2008-02-07 00:15:37 -08:00
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2009-06-04 17:36:36 -04:00
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2006-10-11 01:20:50 -07:00
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2009-06-04 17:36:36 -04:00
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2006-10-11 01:20:50 -07:00
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2008-09-08 22:25:04 -04:00
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2006-10-11 01:20:50 -07:00
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2008-02-07 00:15:37 -08:00
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2009-06-04 17:36:36 -04:00
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2006-10-11 01:20:50 -07:00
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2016-09-30 02:05:09 -04:00
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2006-10-11 01:20:50 -07:00
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2006-10-11 01:21:01 -07:00
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2006-10-11 01:20:50 -07:00
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2009-06-04 17:36:36 -04:00
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2006-10-11 01:20:50 -07:00
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2006-10-11 01:20:53 -07:00
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2006-10-11 01:20:50 -07:00
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2006-10-11 01:20:53 -07:00
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2006-10-11 01:20:50 -07:00
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2008-07-26 16:15:44 -04:00
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2006-10-11 01:20:50 -07:00
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2006-10-11 01:20:53 -07:00
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2006-10-11 01:20:50 -07:00
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2006-10-11 01:20:53 -07:00
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2006-10-11 01:20:50 -07:00
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2008-07-26 16:15:44 -04:00
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2006-10-11 01:20:50 -07:00
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2015-10-17 16:18:43 -04:00
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2009-01-07 00:06:22 -05:00
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2009-06-04 17:36:36 -04:00
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2006-10-11 01:20:50 -07:00
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2009-05-22 17:17:49 -04:00
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2006-10-11 01:20:50 -07:00
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2009-06-04 17:36:36 -04:00
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2006-10-11 01:20:50 -07:00
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2006-10-11 01:20:53 -07:00
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2006-10-11 01:20:50 -07:00
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2009-06-04 17:36:36 -04:00
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2006-10-11 01:20:50 -07:00
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2012-05-28 17:47:52 -04:00
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2006-10-11 01:20:53 -07:00
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2006-10-11 01:20:50 -07:00
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2006-10-11 01:20:53 -07:00
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2009-06-04 17:36:36 -04:00
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2006-10-11 01:20:50 -07:00
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2014-09-11 11:44:36 -04:00
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2006-10-11 01:20:53 -07:00
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2009-06-04 17:36:36 -04:00
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2006-10-11 01:20:50 -07:00
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2006-10-11 01:21:10 -07:00
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2006-10-11 01:20:50 -07:00
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2006-10-11 01:21:01 -07:00
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2006-10-11 01:20:50 -07:00
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2009-06-04 17:36:36 -04:00
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2006-10-11 01:20:50 -07:00
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2016-06-05 14:31:44 -05:00
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2006-10-11 01:20:50 -07:00
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2009-06-04 17:36:36 -04:00
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2006-10-11 01:20:50 -07:00
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2009-06-04 17:36:36 -04:00
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2006-10-11 01:20:50 -07:00
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2006-10-11 01:20:53 -07:00
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2006-10-11 01:20:50 -07:00
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2009-06-03 17:59:28 -04:00
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2006-10-11 01:20:50 -07:00
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2006-10-11 01:21:01 -07:00
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2006-10-11 01:20:50 -07:00
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2006-10-11 01:20:53 -07:00
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2006-10-11 01:20:50 -07:00
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2006-10-11 01:20:53 -07:00
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2006-10-11 01:20:50 -07:00
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2015-10-17 16:18:43 -04:00
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2009-01-07 00:06:22 -05:00
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2006-10-11 01:20:50 -07:00
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2009-06-04 17:36:36 -04:00
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2006-10-11 01:20:50 -07:00
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2015-10-17 16:18:43 -04:00
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2006-10-11 01:20:50 -07:00
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2009-06-04 17:36:36 -04:00
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2006-10-11 01:20:50 -07:00
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2009-06-04 17:36:36 -04:00
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2006-10-11 01:20:50 -07:00
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2009-06-04 17:36:36 -04:00
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2006-10-11 01:20:50 -07:00
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2009-06-04 17:36:36 -04:00
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2006-10-11 01:20:50 -07:00
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2006-10-11 01:20:53 -07:00
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2006-10-11 01:20:50 -07:00
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2006-10-11 01:20:53 -07:00
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2006-10-11 01:20:50 -07:00
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2009-09-29 15:51:30 -04:00
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2009-06-04 17:36:36 -04:00
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2008-09-08 23:00:52 -04:00
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2015-10-17 16:18:43 -04:00
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2006-10-11 01:21:01 -07:00
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2010-07-27 11:56:03 -04:00
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2010-07-27 11:56:03 -04:00
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2006-10-11 01:20:50 -07:00
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2009-06-04 17:36:36 -04:00
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2006-10-11 01:21:01 -07:00
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2006-10-11 01:20:50 -07:00
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2006-10-11 01:20:53 -07:00
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2006-10-11 01:20:50 -07:00
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2010-10-27 21:30:06 -04:00
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2006-10-11 01:20:50 -07:00
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2009-05-01 00:33:44 -04:00
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2006-10-11 01:20:50 -07:00
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2009-05-01 00:33:44 -04:00
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2006-10-11 01:20:50 -07:00
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2009-05-01 00:33:44 -04:00
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2006-10-11 01:20:53 -07:00
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2009-01-09 16:40:58 -08:00
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2006-10-11 01:20:50 -07:00
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2015-08-16 10:03:57 -04:00
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2009-01-09 16:40:58 -08:00
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2009-09-10 17:31:04 -04:00
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2010-07-27 11:56:08 -04:00
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2009-02-28 19:39:58 -05:00
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2010-07-27 11:56:08 -04:00
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2014-07-15 06:01:38 -04:00
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2011-09-09 18:56:51 -04:00
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2014-07-15 06:01:38 -04:00
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2010-11-03 12:03:21 -04:00
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2006-10-11 01:20:50 -07:00
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2012-10-10 01:06:58 -04:00
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ext4: don't lock buffer in ext4_commit_super if holding spinlock
commit 1566a48aaa10c6bb29b9a69dd8279f9a4fc41e35 upstream.
If there is an error reported in mballoc via ext4_grp_locked_error(),
the code is holding a spinlock, so ext4_commit_super() must not try to
lock the buffer head, or else it will trigger a BUG:
BUG: sleeping function called from invalid context at ./include/linux/buffer_head.h:358
in_atomic(): 1, irqs_disabled(): 0, pid: 993, name: mount
CPU: 0 PID: 993 Comm: mount Not tainted 4.9.0-rc1-clouder1 #62
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.8.1-0-g4adadbd-20150316_085822-nilsson.home.kraxel.org 04/01/2014
ffff880006423548 ffffffff81318c89 ffffffff819ecdd0 0000000000000166
ffff880006423558 ffffffff810810b0 ffff880006423580 ffffffff81081153
ffff880006e5a1a0 ffff88000690e400 0000000000000000 ffff8800064235c0
Call Trace:
[<ffffffff81318c89>] dump_stack+0x67/0x9e
[<ffffffff810810b0>] ___might_sleep+0xf0/0x140
[<ffffffff81081153>] __might_sleep+0x53/0xb0
[<ffffffff8126c1dc>] ext4_commit_super+0x19c/0x290
[<ffffffff8126e61a>] __ext4_grp_locked_error+0x14a/0x230
[<ffffffff81081153>] ? __might_sleep+0x53/0xb0
[<ffffffff812822be>] ext4_mb_generate_buddy+0x1de/0x320
Since ext4_grp_locked_error() calls ext4_commit_super with sync == 0
(and it is the only caller which does so), avoid locking and unlocking
the buffer in this case.
This can result in races with ext4_commit_super() if there are other
problems (which is what commit 4743f83990614 was trying to address),
but a Warning is better than BUG.
Fixes: 4743f83990614
Reported-by: Nikolay Borisov <kernel@kyup.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Reviewed-by: Jan Kara <jack@suse.cz>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-11-13 22:02:29 -05:00
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2016-07-04 10:24:52 -04:00
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2006-10-11 01:20:50 -07:00
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2008-10-06 21:35:40 -04:00
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ext4: don't lock buffer in ext4_commit_super if holding spinlock
commit 1566a48aaa10c6bb29b9a69dd8279f9a4fc41e35 upstream.
If there is an error reported in mballoc via ext4_grp_locked_error(),
the code is holding a spinlock, so ext4_commit_super() must not try to
lock the buffer head, or else it will trigger a BUG:
BUG: sleeping function called from invalid context at ./include/linux/buffer_head.h:358
in_atomic(): 1, irqs_disabled(): 0, pid: 993, name: mount
CPU: 0 PID: 993 Comm: mount Not tainted 4.9.0-rc1-clouder1 #62
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.8.1-0-g4adadbd-20150316_085822-nilsson.home.kraxel.org 04/01/2014
ffff880006423548 ffffffff81318c89 ffffffff819ecdd0 0000000000000166
ffff880006423558 ffffffff810810b0 ffff880006423580 ffffffff81081153
ffff880006e5a1a0 ffff88000690e400 0000000000000000 ffff8800064235c0
Call Trace:
[<ffffffff81318c89>] dump_stack+0x67/0x9e
[<ffffffff810810b0>] ___might_sleep+0xf0/0x140
[<ffffffff81081153>] __might_sleep+0x53/0xb0
[<ffffffff8126c1dc>] ext4_commit_super+0x19c/0x290
[<ffffffff8126e61a>] __ext4_grp_locked_error+0x14a/0x230
[<ffffffff81081153>] ? __might_sleep+0x53/0xb0
[<ffffffff812822be>] ext4_mb_generate_buddy+0x1de/0x320
Since ext4_grp_locked_error() calls ext4_commit_super with sync == 0
(and it is the only caller which does so), avoid locking and unlocking
the buffer in this case.
This can result in races with ext4_commit_super() if there are other
problems (which is what commit 4743f83990614 was trying to address),
but a Warning is better than BUG.
Fixes: 4743f83990614
Reported-by: Nikolay Borisov <kernel@kyup.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Reviewed-by: Jan Kara <jack@suse.cz>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-11-13 22:02:29 -05:00
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|
ext4, jbd2: add REQ_FUA flag when recording an error in the superblock
When an error condition is detected, an error status should be recorded into
superblocks of EXT4 or JBD2. However, the write request is submitted now
without REQ_FUA flag, even in "barrier=1" mode, which is followed by
panic() function in "errors=panic" mode. On mobile devices which make
whole system reset as soon as kernel panic occurs, this write request
containing an error flag will disappear just from storage cache without
written to the physical cells. Therefore, when next start, even forever,
the error flag cannot be shown in both superblocks, and e2fsck cannot fix
the filesystem problems automatically, unless e2fsck is executed in
force checking mode.
[ Changed use test_opt(sb, BARRIER) of checking the journal flags -- TYT ]
Signed-off-by: Daeho Jeong <daeho.jeong@samsung.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
2015-07-23 09:46:11 -04:00
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2009-01-09 16:40:58 -08:00
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2009-06-04 17:36:36 -04:00
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2008-10-06 21:35:40 -04:00
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2009-01-09 16:40:58 -08:00
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2006-10-11 01:20:50 -07:00
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2008-07-26 16:15:44 -04:00
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2006-10-11 01:20:50 -07:00
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2006-10-11 01:20:53 -07:00
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2006-10-11 01:20:50 -07:00
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2015-10-17 16:18:43 -04:00
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2009-01-07 00:06:22 -05:00
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2006-10-11 01:21:01 -07:00
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2008-10-10 20:29:21 -04:00
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2015-10-17 16:18:43 -04:00
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2006-10-11 01:20:50 -07:00
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2015-10-17 16:18:43 -04:00
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2009-05-01 00:33:44 -04:00
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2006-10-11 01:20:50 -07:00
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2008-10-10 20:29:21 -04:00
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2006-10-11 01:21:01 -07:00
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2006-10-11 01:20:50 -07:00
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2008-07-26 16:15:44 -04:00
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2006-10-11 01:20:50 -07:00
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2015-10-17 16:18:43 -04:00
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2009-01-07 00:06:22 -05:00
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2006-10-11 01:20:53 -07:00
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2006-10-11 01:20:50 -07:00
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2006-10-11 01:20:53 -07:00
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2006-10-11 01:20:50 -07:00
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2006-10-11 01:21:01 -07:00
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2006-10-11 01:20:50 -07:00
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2006-10-11 01:20:53 -07:00
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2010-02-15 14:19:27 -05:00
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2006-10-11 01:20:50 -07:00
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2010-02-15 14:19:27 -05:00
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2006-10-11 01:20:50 -07:00
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2006-10-11 01:20:53 -07:00
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2009-05-01 00:33:44 -04:00
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2006-10-11 01:20:50 -07:00
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2006-10-11 01:21:01 -07:00
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2012-08-05 19:04:57 -04:00
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2006-10-11 01:20:50 -07:00
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2006-10-11 01:20:53 -07:00
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2006-10-11 01:20:50 -07:00
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2006-10-11 01:20:53 -07:00
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2013-01-28 21:41:02 -05:00
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2006-10-11 01:20:50 -07:00
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2006-10-11 01:20:53 -07:00
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2006-10-11 01:20:50 -07:00
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2008-11-03 18:10:55 -05:00
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2009-02-10 06:46:05 -05:00
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2013-06-12 22:25:07 -04:00
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2009-09-28 15:48:29 -04:00
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2006-10-11 01:20:50 -07:00
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2009-06-17 11:48:11 -04:00
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2013-06-04 14:21:02 -04:00
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2012-07-03 16:45:29 +02:00
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2013-06-12 22:25:07 -04:00
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2014-09-18 16:12:37 -04:00
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2013-06-12 22:25:07 -04:00
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2009-01-07 00:06:22 -05:00
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2013-06-12 22:25:07 -04:00
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2006-10-11 01:20:50 -07:00
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2011-04-10 22:06:07 -04:00
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2012-06-12 16:20:38 +02:00
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2006-10-11 01:20:50 -07:00
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2009-01-09 16:40:58 -08:00
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2006-10-11 01:20:50 -07:00
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2009-01-09 16:40:58 -08:00
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2006-10-11 01:20:50 -07:00
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2009-05-01 12:52:25 -04:00
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2006-10-11 01:20:50 -07:00
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2009-05-01 12:52:25 -04:00
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2008-10-10 20:29:21 -04:00
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2014-09-18 17:12:02 -04:00
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2006-10-11 01:20:50 -07:00
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2014-09-18 17:12:02 -04:00
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2015-08-15 10:45:06 -04:00
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2015-10-17 16:18:43 -04:00
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2014-09-18 17:12:02 -04:00
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2009-05-01 12:52:25 -04:00
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2010-05-16 02:00:00 -04:00
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2014-09-18 17:12:02 -04:00
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2010-05-16 02:00:00 -04:00
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2006-10-11 01:20:50 -07:00
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2009-01-09 16:40:58 -08:00
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2006-10-11 01:20:50 -07:00
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2009-05-01 12:52:25 -04:00
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2015-08-15 10:45:06 -04:00
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2015-10-17 16:18:43 -04:00
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2015-08-15 10:45:06 -04:00
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2009-05-01 12:52:25 -04:00
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2009-01-09 16:40:58 -08:00
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2006-10-11 01:20:50 -07:00
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2010-12-15 20:28:48 -05:00
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2010-12-15 20:30:48 -05:00
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2012-02-07 15:41:49 -08:00
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2010-12-15 20:28:48 -05:00
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2014-09-11 11:15:15 -04:00
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2010-12-15 20:28:48 -05:00
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2008-07-26 16:15:44 -04:00
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2006-10-11 01:20:50 -07:00
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2008-07-26 16:15:44 -04:00
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2006-10-11 01:20:53 -07:00
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2006-10-11 01:20:50 -07:00
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2006-10-11 01:20:53 -07:00
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2010-05-19 07:16:40 -04:00
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2008-07-26 14:34:21 -04:00
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2009-01-05 22:46:26 -05:00
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2011-05-24 18:31:25 -04:00
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2006-10-11 01:20:50 -07:00
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2013-01-24 23:24:58 -05:00
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2006-10-11 01:20:50 -07:00
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2010-05-16 12:00:00 -04:00
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2006-10-11 01:20:50 -07:00
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2010-12-15 20:30:48 -05:00
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2006-10-11 01:20:50 -07:00
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2009-01-03 20:27:38 -05:00
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2006-10-11 01:20:50 -07:00
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2014-09-11 11:15:15 -04:00
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2013-01-24 23:24:58 -05:00
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2013-03-02 17:13:55 -05:00
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2013-01-24 23:24:58 -05:00
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2006-10-11 01:20:50 -07:00
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2009-01-05 22:46:26 -05:00
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2006-10-11 01:20:50 -07:00
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2012-02-20 17:53:04 -05:00
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2006-10-11 01:20:50 -07:00
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2014-10-30 10:53:16 -04:00
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2014-11-25 16:20:50 -05:00
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2015-02-12 23:07:37 -05:00
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2014-10-30 10:53:16 -04:00
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2013-08-08 23:02:24 -04:00
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2015-02-16 15:59:38 -08:00
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2013-08-08 23:02:24 -04:00
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2009-06-13 10:09:36 -04:00
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2010-06-29 11:07:07 -04:00
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2006-10-11 01:20:50 -07:00
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2010-02-24 11:35:32 -05:00
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2006-10-11 01:20:50 -07:00
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2009-01-05 22:46:26 -05:00
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2009-01-07 00:06:22 -05:00
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2009-01-05 22:46:26 -05:00
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2006-10-11 01:20:50 -07:00
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2015-06-23 11:03:54 -04:00
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2012-02-20 17:53:04 -05:00
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2009-06-13 10:09:36 -04:00
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2006-10-11 01:20:50 -07:00
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2014-03-13 22:49:42 -04:00
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2010-05-19 07:16:41 -04:00
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2010-05-19 07:16:40 -04:00
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2006-10-11 01:20:50 -07:00
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2006-10-11 01:20:53 -07:00
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2006-10-11 01:20:50 -07:00
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2009-05-01 01:59:42 -04:00
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2009-01-07 00:06:22 -05:00
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2006-10-11 01:20:50 -07:00
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2009-08-18 00:20:23 -04:00
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2015-10-17 16:18:43 -04:00
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2015-02-12 22:31:21 -05:00
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2006-10-11 01:20:50 -07:00
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2008-07-26 14:34:21 -04:00
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2009-06-03 17:59:28 -04:00
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2008-07-26 14:34:21 -04:00
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2012-04-29 18:45:10 -04:00
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2009-06-04 17:36:36 -04:00
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2015-10-17 16:18:43 -04:00
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2008-07-26 14:34:21 -04:00
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2015-10-17 16:16:04 -04:00
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2008-07-26 14:34:21 -04:00
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2007-02-10 01:46:08 -08:00
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2009-06-04 17:36:36 -04:00
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2007-02-10 01:46:08 -08:00
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2009-06-04 17:36:36 -04:00
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2007-02-10 01:46:08 -08:00
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2006-10-11 01:20:50 -07:00
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2009-01-07 00:06:22 -05:00
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2006-10-11 01:20:50 -07:00
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2008-07-26 16:15:44 -04:00
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2006-10-11 01:20:50 -07:00
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2015-10-17 16:18:43 -04:00
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2011-05-24 18:31:25 -04:00
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2010-05-19 07:16:40 -04:00
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2006-10-11 01:20:50 -07:00
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ext4: add support for lazy inode table initialization
When the lazy_itable_init extended option is passed to mke2fs, it
considerably speeds up filesystem creation because inode tables are
not zeroed out. The fact that parts of the inode table are
uninitialized is not a problem so long as the block group descriptors,
which contain information regarding how much of the inode table has
been initialized, has not been corrupted However, if the block group
checksums are not valid, e2fsck must scan the entire inode table, and
the the old, uninitialized data could potentially cause e2fsck to
report false problems.
Hence, it is important for the inode tables to be initialized as soon
as possble. This commit adds this feature so that mke2fs can safely
use the lazy inode table initialization feature to speed up formatting
file systems.
This is done via a new new kernel thread called ext4lazyinit, which is
created on demand and destroyed, when it is no longer needed. There
is only one thread for all ext4 filesystems in the system. When the
first filesystem with inititable mount option is mounted, ext4lazyinit
thread is created, then the filesystem can register its request in the
request list.
This thread then walks through the list of requests picking up
scheduled requests and invoking ext4_init_inode_table(). Next schedule
time for the request is computed by multiplying the time it took to
zero out last inode table with wait multiplier, which can be set with
the (init_itable=n) mount option (default is 10). We are doing
this so we do not take the whole I/O bandwidth. When the thread is no
longer necessary (request list is empty) it frees the appropriate
structures and exits (and can be created later later by another
filesystem).
We do not disturb regular inode allocations in any way, it just do not
care whether the inode table is, or is not zeroed. But when zeroing, we
have to skip used inodes, obviously. Also we should prevent new inode
allocations from the group, while zeroing is on the way. For that we
take write alloc_sem lock in ext4_init_inode_table() and read alloc_sem
in the ext4_claim_inode, so when we are unlucky and allocator hits the
group which is currently being zeroed, it just has to wait.
This can be suppresed using the mount option no_init_itable.
Signed-off-by: Lukas Czerner <lczerner@redhat.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2010-10-27 21:30:05 -04:00
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2009-05-17 15:38:01 -04:00
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2012-12-25 14:08:16 -05:00
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2009-05-01 00:33:44 -04:00
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2009-01-07 00:06:22 -05:00
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2006-10-11 01:20:50 -07:00
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2014-09-11 11:15:15 -04:00
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2013-01-24 23:24:58 -05:00
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|
ext4: make quota as first class supported feature
This patch adds support for quotas as a first class feature in ext4;
which is to say, the quota files are stored in hidden inodes as file
system metadata, instead of as separate files visible in the file system
directory hierarchy.
It is based on the proposal at:
https://ext4.wiki.kernel.org/index.php/Design_For_1st_Class_Quota_in_Ext4
This patch introduces a new feature - EXT4_FEATURE_RO_COMPAT_QUOTA
which, when turned on, enables quota accounting at mount time
iteself. Also, the quota inodes are stored in two additional superblock
fields. Some changes introduced by this patch that should be pointed
out are:
1) Two new ext4-superblock fields - s_usr_quota_inum and
s_grp_quota_inum for storing the quota inodes in use.
2) Default quota inodes are: inode#3 for tracking userquota and inode#4
for tracking group quota. The superblock fields can be set to use
other inodes as well.
3) If the QUOTA feature and corresponding quota inodes are set in
superblock, the quota usage tracking is turned on at mount time. On
'quotaon' ioctl, the quota limits enforcement is turned
on. 'quotaoff' ioctl turns off only the limits enforcement in this
case.
4) When QUOTA feature is in use, the quota mount options 'quota',
'usrquota', 'grpquota' are ignored by the kernel.
5) mke2fs or tune2fs can be used to set the QUOTA feature and initialize
quota inodes. The default reserved inodes will not be visible to user
as regular files.
6) The quota-tools will need to be modified to support hidden quota
files on ext4. E2fsprogs will also include support for creating and
fixing quota files.
7) Support is only for the new V2 quota file format.
Tested-by: Jan Kara <jack@suse.cz>
Reviewed-by: Jan Kara <jack@suse.cz>
Reviewed-by: Johann Lombardi <johann@whamcloud.com>
Signed-off-by: Aditya Kali <adityakali@google.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2012-07-22 20:21:31 -04:00
|
|
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|
|
|
|
|
|
|
|
|
|
|
2015-10-17 16:18:43 -04:00
|
|
|
|
ext4: make quota as first class supported feature
This patch adds support for quotas as a first class feature in ext4;
which is to say, the quota files are stored in hidden inodes as file
system metadata, instead of as separate files visible in the file system
directory hierarchy.
It is based on the proposal at:
https://ext4.wiki.kernel.org/index.php/Design_For_1st_Class_Quota_in_Ext4
This patch introduces a new feature - EXT4_FEATURE_RO_COMPAT_QUOTA
which, when turned on, enables quota accounting at mount time
iteself. Also, the quota inodes are stored in two additional superblock
fields. Some changes introduced by this patch that should be pointed
out are:
1) Two new ext4-superblock fields - s_usr_quota_inum and
s_grp_quota_inum for storing the quota inodes in use.
2) Default quota inodes are: inode#3 for tracking userquota and inode#4
for tracking group quota. The superblock fields can be set to use
other inodes as well.
3) If the QUOTA feature and corresponding quota inodes are set in
superblock, the quota usage tracking is turned on at mount time. On
'quotaon' ioctl, the quota limits enforcement is turned
on. 'quotaoff' ioctl turns off only the limits enforcement in this
case.
4) When QUOTA feature is in use, the quota mount options 'quota',
'usrquota', 'grpquota' are ignored by the kernel.
5) mke2fs or tune2fs can be used to set the QUOTA feature and initialize
quota inodes. The default reserved inodes will not be visible to user
as regular files.
6) The quota-tools will need to be modified to support hidden quota
files on ext4. E2fsprogs will also include support for creating and
fixing quota files.
7) Support is only for the new V2 quota file format.
Tested-by: Jan Kara <jack@suse.cz>
Reviewed-by: Jan Kara <jack@suse.cz>
Reviewed-by: Johann Lombardi <johann@whamcloud.com>
Signed-off-by: Aditya Kali <adityakali@google.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2012-07-22 20:21:31 -04:00
|
|
|
|
2012-08-17 19:08:42 -04:00
|
|
|
|
ext4: make quota as first class supported feature
This patch adds support for quotas as a first class feature in ext4;
which is to say, the quota files are stored in hidden inodes as file
system metadata, instead of as separate files visible in the file system
directory hierarchy.
It is based on the proposal at:
https://ext4.wiki.kernel.org/index.php/Design_For_1st_Class_Quota_in_Ext4
This patch introduces a new feature - EXT4_FEATURE_RO_COMPAT_QUOTA
which, when turned on, enables quota accounting at mount time
iteself. Also, the quota inodes are stored in two additional superblock
fields. Some changes introduced by this patch that should be pointed
out are:
1) Two new ext4-superblock fields - s_usr_quota_inum and
s_grp_quota_inum for storing the quota inodes in use.
2) Default quota inodes are: inode#3 for tracking userquota and inode#4
for tracking group quota. The superblock fields can be set to use
other inodes as well.
3) If the QUOTA feature and corresponding quota inodes are set in
superblock, the quota usage tracking is turned on at mount time. On
'quotaon' ioctl, the quota limits enforcement is turned
on. 'quotaoff' ioctl turns off only the limits enforcement in this
case.
4) When QUOTA feature is in use, the quota mount options 'quota',
'usrquota', 'grpquota' are ignored by the kernel.
5) mke2fs or tune2fs can be used to set the QUOTA feature and initialize
quota inodes. The default reserved inodes will not be visible to user
as regular files.
6) The quota-tools will need to be modified to support hidden quota
files on ext4. E2fsprogs will also include support for creating and
fixing quota files.
7) Support is only for the new V2 quota file format.
Tested-by: Jan Kara <jack@suse.cz>
Reviewed-by: Jan Kara <jack@suse.cz>
Reviewed-by: Johann Lombardi <johann@whamcloud.com>
Signed-off-by: Aditya Kali <adityakali@google.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2012-07-22 20:21:31 -04:00
|
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|
2006-10-11 01:20:50 -07:00
|
|
|
|
2010-05-16 12:00:00 -04:00
|
|
|
|
2015-02-02 00:37:02 -05:00
|
|
|
|
2010-05-16 12:00:00 -04:00
|
|
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|
|
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|
|
|
2006-10-11 01:20:50 -07:00
|
|
|
|
2009-06-03 17:59:28 -04:00
|
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|
2006-10-11 01:20:50 -07:00
|
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2010-12-15 20:30:48 -05:00
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2006-10-11 01:20:50 -07:00
|
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2009-01-03 20:27:38 -05:00
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2006-10-11 01:20:50 -07:00
|
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2014-09-11 11:15:15 -04:00
|
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|
2013-01-24 23:24:58 -05:00
|
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2006-10-11 01:20:50 -07:00
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2010-05-16 12:00:00 -04:00
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2006-10-11 01:20:50 -07:00
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2016-01-08 16:01:22 -05:00
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2008-07-26 16:15:44 -04:00
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2006-10-11 01:20:50 -07:00
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2006-10-11 01:20:53 -07:00
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2013-04-09 22:11:22 -04:00
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2006-12-06 20:35:29 -08:00
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2011-05-24 18:30:07 -04:00
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2013-04-09 22:11:22 -04:00
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2006-10-11 01:20:50 -07:00
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2012-07-09 16:27:05 -04:00
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2006-10-11 01:20:50 -07:00
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2006-10-11 01:20:53 -07:00
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2006-10-11 01:20:50 -07:00
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2012-11-08 10:33:36 -05:00
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2011-09-09 18:56:51 -04:00
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2011-05-24 18:30:07 -04:00
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2011-09-09 18:56:51 -04:00
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2013-04-09 22:11:22 -04:00
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2006-10-11 01:20:50 -07:00
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2007-10-16 23:25:44 -07:00
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2006-10-11 01:20:53 -07:00
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2006-12-06 20:35:29 -08:00
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2009-06-03 17:59:28 -04:00
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2016-01-08 16:01:22 -05:00
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2006-10-11 01:20:50 -07:00
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2009-06-03 17:59:28 -04:00
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2006-10-11 01:20:50 -07:00
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2006-10-11 01:20:53 -07:00
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2009-01-26 17:04:39 +01:00
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2010-03-03 09:05:07 -05:00
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2006-10-11 01:21:01 -07:00
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2006-10-11 01:20:50 -07:00
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2012-09-16 03:56:19 -07:00
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2006-10-11 01:20:50 -07:00
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2006-10-11 01:20:53 -07:00
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2006-10-11 01:20:50 -07:00
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2013-02-08 21:59:22 -05:00
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2009-06-03 17:59:28 -04:00
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2006-10-11 01:20:50 -07:00
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2006-10-11 01:20:53 -07:00
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2006-10-11 01:20:50 -07:00
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2006-10-11 01:20:53 -07:00
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2006-10-11 01:20:50 -07:00
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2013-02-08 21:59:22 -05:00
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2009-06-03 17:59:28 -04:00
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2006-10-11 01:20:50 -07:00
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2006-10-11 01:20:53 -07:00
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2006-10-11 01:20:50 -07:00
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2006-10-11 01:20:53 -07:00
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2006-10-11 01:20:50 -07:00
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2013-02-08 21:59:22 -05:00
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2009-06-03 17:59:28 -04:00
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2007-09-11 15:23:29 -07:00
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2006-10-11 01:20:50 -07:00
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2007-09-11 15:23:29 -07:00
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2006-10-11 01:20:50 -07:00
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2006-10-11 01:20:53 -07:00
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2006-10-11 01:20:50 -07:00
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2006-10-11 01:20:53 -07:00
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2006-10-11 01:20:50 -07:00
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2013-03-02 17:57:08 -05:00
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2008-05-13 21:27:55 -04:00
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2015-10-17 16:18:43 -04:00
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2013-03-02 17:57:08 -05:00
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2006-10-11 01:20:50 -07:00
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2006-10-11 01:20:53 -07:00
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2006-10-11 01:20:50 -07:00
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2006-10-11 01:20:53 -07:00
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2006-10-11 01:20:50 -07:00
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2015-03-17 22:25:59 +00:00
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2006-10-11 01:20:50 -07:00
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2006-10-11 01:20:53 -07:00
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2006-10-11 01:20:50 -07:00
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2006-10-11 01:20:53 -07:00
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2006-10-11 01:20:50 -07:00
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2010-05-19 07:16:45 -04:00
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2006-10-11 01:20:50 -07:00
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2016-04-01 01:31:28 -04:00
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2006-10-11 01:20:50 -07:00
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2006-10-11 01:20:53 -07:00
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2010-09-15 17:38:58 +02:00
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2006-10-11 01:20:50 -07:00
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2008-05-13 19:11:51 -04:00
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2006-10-11 01:20:50 -07:00
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2011-12-07 18:16:57 -05:00
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2006-10-11 01:20:50 -07:00
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2008-05-13 19:11:51 -04:00
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2008-07-26 16:15:44 -04:00
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2010-09-15 17:38:58 +02:00
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2009-06-04 17:36:36 -04:00
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2008-07-26 16:15:44 -04:00
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2008-05-13 19:11:51 -04:00
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2009-01-07 00:06:22 -05:00
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2015-03-17 22:25:59 +00:00
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2008-05-13 19:11:51 -04:00
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2008-10-10 20:29:21 -04:00
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2008-05-13 19:11:51 -04:00
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2010-09-15 17:38:58 +02:00
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2008-10-10 20:29:21 -04:00
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2008-05-13 19:11:51 -04:00
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2016-04-01 01:31:28 -04:00
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2006-10-11 01:20:50 -07:00
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ext4: make quota as first class supported feature
This patch adds support for quotas as a first class feature in ext4;
which is to say, the quota files are stored in hidden inodes as file
system metadata, instead of as separate files visible in the file system
directory hierarchy.
It is based on the proposal at:
https://ext4.wiki.kernel.org/index.php/Design_For_1st_Class_Quota_in_Ext4
This patch introduces a new feature - EXT4_FEATURE_RO_COMPAT_QUOTA
which, when turned on, enables quota accounting at mount time
iteself. Also, the quota inodes are stored in two additional superblock
fields. Some changes introduced by this patch that should be pointed
out are:
1) Two new ext4-superblock fields - s_usr_quota_inum and
s_grp_quota_inum for storing the quota inodes in use.
2) Default quota inodes are: inode#3 for tracking userquota and inode#4
for tracking group quota. The superblock fields can be set to use
other inodes as well.
3) If the QUOTA feature and corresponding quota inodes are set in
superblock, the quota usage tracking is turned on at mount time. On
'quotaon' ioctl, the quota limits enforcement is turned
on. 'quotaoff' ioctl turns off only the limits enforcement in this
case.
4) When QUOTA feature is in use, the quota mount options 'quota',
'usrquota', 'grpquota' are ignored by the kernel.
5) mke2fs or tune2fs can be used to set the QUOTA feature and initialize
quota inodes. The default reserved inodes will not be visible to user
as regular files.
6) The quota-tools will need to be modified to support hidden quota
files on ext4. E2fsprogs will also include support for creating and
fixing quota files.
7) Support is only for the new V2 quota file format.
Tested-by: Jan Kara <jack@suse.cz>
Reviewed-by: Jan Kara <jack@suse.cz>
Reviewed-by: Johann Lombardi <johann@whamcloud.com>
Signed-off-by: Aditya Kali <adityakali@google.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2012-07-22 20:21:31 -04:00
|
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|
2014-09-11 11:15:15 -04:00
|
|
|
|
ext4: make quota as first class supported feature
This patch adds support for quotas as a first class feature in ext4;
which is to say, the quota files are stored in hidden inodes as file
system metadata, instead of as separate files visible in the file system
directory hierarchy.
It is based on the proposal at:
https://ext4.wiki.kernel.org/index.php/Design_For_1st_Class_Quota_in_Ext4
This patch introduces a new feature - EXT4_FEATURE_RO_COMPAT_QUOTA
which, when turned on, enables quota accounting at mount time
iteself. Also, the quota inodes are stored in two additional superblock
fields. Some changes introduced by this patch that should be pointed
out are:
1) Two new ext4-superblock fields - s_usr_quota_inum and
s_grp_quota_inum for storing the quota inodes in use.
2) Default quota inodes are: inode#3 for tracking userquota and inode#4
for tracking group quota. The superblock fields can be set to use
other inodes as well.
3) If the QUOTA feature and corresponding quota inodes are set in
superblock, the quota usage tracking is turned on at mount time. On
'quotaon' ioctl, the quota limits enforcement is turned
on. 'quotaoff' ioctl turns off only the limits enforcement in this
case.
4) When QUOTA feature is in use, the quota mount options 'quota',
'usrquota', 'grpquota' are ignored by the kernel.
5) mke2fs or tune2fs can be used to set the QUOTA feature and initialize
quota inodes. The default reserved inodes will not be visible to user
as regular files.
6) The quota-tools will need to be modified to support hidden quota
files on ext4. E2fsprogs will also include support for creating and
fixing quota files.
7) Support is only for the new V2 quota file format.
Tested-by: Jan Kara <jack@suse.cz>
Reviewed-by: Jan Kara <jack@suse.cz>
Reviewed-by: Johann Lombardi <johann@whamcloud.com>
Signed-off-by: Aditya Kali <adityakali@google.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2012-07-22 20:21:31 -04:00
|
|
|
|
2016-01-08 16:01:22 -05:00
|
|
|
|
|
|
|
|
|
ext4: make quota as first class supported feature
This patch adds support for quotas as a first class feature in ext4;
which is to say, the quota files are stored in hidden inodes as file
system metadata, instead of as separate files visible in the file system
directory hierarchy.
It is based on the proposal at:
https://ext4.wiki.kernel.org/index.php/Design_For_1st_Class_Quota_in_Ext4
This patch introduces a new feature - EXT4_FEATURE_RO_COMPAT_QUOTA
which, when turned on, enables quota accounting at mount time
iteself. Also, the quota inodes are stored in two additional superblock
fields. Some changes introduced by this patch that should be pointed
out are:
1) Two new ext4-superblock fields - s_usr_quota_inum and
s_grp_quota_inum for storing the quota inodes in use.
2) Default quota inodes are: inode#3 for tracking userquota and inode#4
for tracking group quota. The superblock fields can be set to use
other inodes as well.
3) If the QUOTA feature and corresponding quota inodes are set in
superblock, the quota usage tracking is turned on at mount time. On
'quotaon' ioctl, the quota limits enforcement is turned
on. 'quotaoff' ioctl turns off only the limits enforcement in this
case.
4) When QUOTA feature is in use, the quota mount options 'quota',
'usrquota', 'grpquota' are ignored by the kernel.
5) mke2fs or tune2fs can be used to set the QUOTA feature and initialize
quota inodes. The default reserved inodes will not be visible to user
as regular files.
6) The quota-tools will need to be modified to support hidden quota
files on ext4. E2fsprogs will also include support for creating and
fixing quota files.
7) Support is only for the new V2 quota file format.
Tested-by: Jan Kara <jack@suse.cz>
Reviewed-by: Jan Kara <jack@suse.cz>
Reviewed-by: Johann Lombardi <johann@whamcloud.com>
Signed-off-by: Aditya Kali <adityakali@google.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2012-07-22 20:21:31 -04:00
|
|
|
|
|
|
|
|
|
2015-10-17 16:18:43 -04:00
|
|
|
|
ext4: make quota as first class supported feature
This patch adds support for quotas as a first class feature in ext4;
which is to say, the quota files are stored in hidden inodes as file
system metadata, instead of as separate files visible in the file system
directory hierarchy.
It is based on the proposal at:
https://ext4.wiki.kernel.org/index.php/Design_For_1st_Class_Quota_in_Ext4
This patch introduces a new feature - EXT4_FEATURE_RO_COMPAT_QUOTA
which, when turned on, enables quota accounting at mount time
iteself. Also, the quota inodes are stored in two additional superblock
fields. Some changes introduced by this patch that should be pointed
out are:
1) Two new ext4-superblock fields - s_usr_quota_inum and
s_grp_quota_inum for storing the quota inodes in use.
2) Default quota inodes are: inode#3 for tracking userquota and inode#4
for tracking group quota. The superblock fields can be set to use
other inodes as well.
3) If the QUOTA feature and corresponding quota inodes are set in
superblock, the quota usage tracking is turned on at mount time. On
'quotaon' ioctl, the quota limits enforcement is turned
on. 'quotaoff' ioctl turns off only the limits enforcement in this
case.
4) When QUOTA feature is in use, the quota mount options 'quota',
'usrquota', 'grpquota' are ignored by the kernel.
5) mke2fs or tune2fs can be used to set the QUOTA feature and initialize
quota inodes. The default reserved inodes will not be visible to user
as regular files.
6) The quota-tools will need to be modified to support hidden quota
files on ext4. E2fsprogs will also include support for creating and
fixing quota files.
7) Support is only for the new V2 quota file format.
Tested-by: Jan Kara <jack@suse.cz>
Reviewed-by: Jan Kara <jack@suse.cz>
Reviewed-by: Johann Lombardi <johann@whamcloud.com>
Signed-off-by: Aditya Kali <adityakali@google.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2012-07-22 20:21:31 -04:00
|
|
|
|
|
|
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|
|
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|
|
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|
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|
|
|
|
|
|
|
|
|
|
2013-04-09 09:21:41 -04:00
|
|
|
|
|
|
|
|
|
2016-04-01 01:31:28 -04:00
|
|
|
|
ext4: make quota as first class supported feature
This patch adds support for quotas as a first class feature in ext4;
which is to say, the quota files are stored in hidden inodes as file
system metadata, instead of as separate files visible in the file system
directory hierarchy.
It is based on the proposal at:
https://ext4.wiki.kernel.org/index.php/Design_For_1st_Class_Quota_in_Ext4
This patch introduces a new feature - EXT4_FEATURE_RO_COMPAT_QUOTA
which, when turned on, enables quota accounting at mount time
iteself. Also, the quota inodes are stored in two additional superblock
fields. Some changes introduced by this patch that should be pointed
out are:
1) Two new ext4-superblock fields - s_usr_quota_inum and
s_grp_quota_inum for storing the quota inodes in use.
2) Default quota inodes are: inode#3 for tracking userquota and inode#4
for tracking group quota. The superblock fields can be set to use
other inodes as well.
3) If the QUOTA feature and corresponding quota inodes are set in
superblock, the quota usage tracking is turned on at mount time. On
'quotaon' ioctl, the quota limits enforcement is turned
on. 'quotaoff' ioctl turns off only the limits enforcement in this
case.
4) When QUOTA feature is in use, the quota mount options 'quota',
'usrquota', 'grpquota' are ignored by the kernel.
5) mke2fs or tune2fs can be used to set the QUOTA feature and initialize
quota inodes. The default reserved inodes will not be visible to user
as regular files.
6) The quota-tools will need to be modified to support hidden quota
files on ext4. E2fsprogs will also include support for creating and
fixing quota files.
7) Support is only for the new V2 quota file format.
Tested-by: Jan Kara <jack@suse.cz>
Reviewed-by: Jan Kara <jack@suse.cz>
Reviewed-by: Johann Lombardi <johann@whamcloud.com>
Signed-off-by: Aditya Kali <adityakali@google.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2012-07-22 20:21:31 -04:00
|
|
|
|
|
|
|
|
|
2016-04-01 01:31:28 -04:00
|
|
|
|
|
|
|
|
|
ext4: make quota as first class supported feature
This patch adds support for quotas as a first class feature in ext4;
which is to say, the quota files are stored in hidden inodes as file
system metadata, instead of as separate files visible in the file system
directory hierarchy.
It is based on the proposal at:
https://ext4.wiki.kernel.org/index.php/Design_For_1st_Class_Quota_in_Ext4
This patch introduces a new feature - EXT4_FEATURE_RO_COMPAT_QUOTA
which, when turned on, enables quota accounting at mount time
iteself. Also, the quota inodes are stored in two additional superblock
fields. Some changes introduced by this patch that should be pointed
out are:
1) Two new ext4-superblock fields - s_usr_quota_inum and
s_grp_quota_inum for storing the quota inodes in use.
2) Default quota inodes are: inode#3 for tracking userquota and inode#4
for tracking group quota. The superblock fields can be set to use
other inodes as well.
3) If the QUOTA feature and corresponding quota inodes are set in
superblock, the quota usage tracking is turned on at mount time. On
'quotaon' ioctl, the quota limits enforcement is turned
on. 'quotaoff' ioctl turns off only the limits enforcement in this
case.
4) When QUOTA feature is in use, the quota mount options 'quota',
'usrquota', 'grpquota' are ignored by the kernel.
5) mke2fs or tune2fs can be used to set the QUOTA feature and initialize
quota inodes. The default reserved inodes will not be visible to user
as regular files.
6) The quota-tools will need to be modified to support hidden quota
files on ext4. E2fsprogs will also include support for creating and
fixing quota files.
7) Support is only for the new V2 quota file format.
Tested-by: Jan Kara <jack@suse.cz>
Reviewed-by: Jan Kara <jack@suse.cz>
Reviewed-by: Johann Lombardi <johann@whamcloud.com>
Signed-off-by: Aditya Kali <adityakali@google.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2012-07-22 20:21:31 -04:00
|
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2014-09-11 11:15:15 -04:00
|
|
|
|
ext4: make quota as first class supported feature
This patch adds support for quotas as a first class feature in ext4;
which is to say, the quota files are stored in hidden inodes as file
system metadata, instead of as separate files visible in the file system
directory hierarchy.
It is based on the proposal at:
https://ext4.wiki.kernel.org/index.php/Design_For_1st_Class_Quota_in_Ext4
This patch introduces a new feature - EXT4_FEATURE_RO_COMPAT_QUOTA
which, when turned on, enables quota accounting at mount time
iteself. Also, the quota inodes are stored in two additional superblock
fields. Some changes introduced by this patch that should be pointed
out are:
1) Two new ext4-superblock fields - s_usr_quota_inum and
s_grp_quota_inum for storing the quota inodes in use.
2) Default quota inodes are: inode#3 for tracking userquota and inode#4
for tracking group quota. The superblock fields can be set to use
other inodes as well.
3) If the QUOTA feature and corresponding quota inodes are set in
superblock, the quota usage tracking is turned on at mount time. On
'quotaon' ioctl, the quota limits enforcement is turned
on. 'quotaoff' ioctl turns off only the limits enforcement in this
case.
4) When QUOTA feature is in use, the quota mount options 'quota',
'usrquota', 'grpquota' are ignored by the kernel.
5) mke2fs or tune2fs can be used to set the QUOTA feature and initialize
quota inodes. The default reserved inodes will not be visible to user
as regular files.
6) The quota-tools will need to be modified to support hidden quota
files on ext4. E2fsprogs will also include support for creating and
fixing quota files.
7) Support is only for the new V2 quota file format.
Tested-by: Jan Kara <jack@suse.cz>
Reviewed-by: Jan Kara <jack@suse.cz>
Reviewed-by: Johann Lombardi <johann@whamcloud.com>
Signed-off-by: Aditya Kali <adityakali@google.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2012-07-22 20:21:31 -04:00
|
|
|
|
2016-01-08 16:01:22 -05:00
|
|
|
|
|
|
|
|
|
ext4: make quota as first class supported feature
This patch adds support for quotas as a first class feature in ext4;
which is to say, the quota files are stored in hidden inodes as file
system metadata, instead of as separate files visible in the file system
directory hierarchy.
It is based on the proposal at:
https://ext4.wiki.kernel.org/index.php/Design_For_1st_Class_Quota_in_Ext4
This patch introduces a new feature - EXT4_FEATURE_RO_COMPAT_QUOTA
which, when turned on, enables quota accounting at mount time
iteself. Also, the quota inodes are stored in two additional superblock
fields. Some changes introduced by this patch that should be pointed
out are:
1) Two new ext4-superblock fields - s_usr_quota_inum and
s_grp_quota_inum for storing the quota inodes in use.
2) Default quota inodes are: inode#3 for tracking userquota and inode#4
for tracking group quota. The superblock fields can be set to use
other inodes as well.
3) If the QUOTA feature and corresponding quota inodes are set in
superblock, the quota usage tracking is turned on at mount time. On
'quotaon' ioctl, the quota limits enforcement is turned
on. 'quotaoff' ioctl turns off only the limits enforcement in this
case.
4) When QUOTA feature is in use, the quota mount options 'quota',
'usrquota', 'grpquota' are ignored by the kernel.
5) mke2fs or tune2fs can be used to set the QUOTA feature and initialize
quota inodes. The default reserved inodes will not be visible to user
as regular files.
6) The quota-tools will need to be modified to support hidden quota
files on ext4. E2fsprogs will also include support for creating and
fixing quota files.
7) Support is only for the new V2 quota file format.
Tested-by: Jan Kara <jack@suse.cz>
Reviewed-by: Jan Kara <jack@suse.cz>
Reviewed-by: Johann Lombardi <johann@whamcloud.com>
Signed-off-by: Aditya Kali <adityakali@google.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2012-07-22 20:21:31 -04:00
|
|
|
|
2016-09-05 23:08:16 -04:00
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
ext4: make quota as first class supported feature
This patch adds support for quotas as a first class feature in ext4;
which is to say, the quota files are stored in hidden inodes as file
system metadata, instead of as separate files visible in the file system
directory hierarchy.
It is based on the proposal at:
https://ext4.wiki.kernel.org/index.php/Design_For_1st_Class_Quota_in_Ext4
This patch introduces a new feature - EXT4_FEATURE_RO_COMPAT_QUOTA
which, when turned on, enables quota accounting at mount time
iteself. Also, the quota inodes are stored in two additional superblock
fields. Some changes introduced by this patch that should be pointed
out are:
1) Two new ext4-superblock fields - s_usr_quota_inum and
s_grp_quota_inum for storing the quota inodes in use.
2) Default quota inodes are: inode#3 for tracking userquota and inode#4
for tracking group quota. The superblock fields can be set to use
other inodes as well.
3) If the QUOTA feature and corresponding quota inodes are set in
superblock, the quota usage tracking is turned on at mount time. On
'quotaon' ioctl, the quota limits enforcement is turned
on. 'quotaoff' ioctl turns off only the limits enforcement in this
case.
4) When QUOTA feature is in use, the quota mount options 'quota',
'usrquota', 'grpquota' are ignored by the kernel.
5) mke2fs or tune2fs can be used to set the QUOTA feature and initialize
quota inodes. The default reserved inodes will not be visible to user
as regular files.
6) The quota-tools will need to be modified to support hidden quota
files on ext4. E2fsprogs will also include support for creating and
fixing quota files.
7) Support is only for the new V2 quota file format.
Tested-by: Jan Kara <jack@suse.cz>
Reviewed-by: Jan Kara <jack@suse.cz>
Reviewed-by: Johann Lombardi <johann@whamcloud.com>
Signed-off-by: Aditya Kali <adityakali@google.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2012-07-22 20:21:31 -04:00
|
|
|
|
|
|
|
|
|
2014-09-11 11:15:15 -04:00
|
|
|
|
ext4: make quota as first class supported feature
This patch adds support for quotas as a first class feature in ext4;
which is to say, the quota files are stored in hidden inodes as file
system metadata, instead of as separate files visible in the file system
directory hierarchy.
It is based on the proposal at:
https://ext4.wiki.kernel.org/index.php/Design_For_1st_Class_Quota_in_Ext4
This patch introduces a new feature - EXT4_FEATURE_RO_COMPAT_QUOTA
which, when turned on, enables quota accounting at mount time
iteself. Also, the quota inodes are stored in two additional superblock
fields. Some changes introduced by this patch that should be pointed
out are:
1) Two new ext4-superblock fields - s_usr_quota_inum and
s_grp_quota_inum for storing the quota inodes in use.
2) Default quota inodes are: inode#3 for tracking userquota and inode#4
for tracking group quota. The superblock fields can be set to use
other inodes as well.
3) If the QUOTA feature and corresponding quota inodes are set in
superblock, the quota usage tracking is turned on at mount time. On
'quotaon' ioctl, the quota limits enforcement is turned
on. 'quotaoff' ioctl turns off only the limits enforcement in this
case.
4) When QUOTA feature is in use, the quota mount options 'quota',
'usrquota', 'grpquota' are ignored by the kernel.
5) mke2fs or tune2fs can be used to set the QUOTA feature and initialize
quota inodes. The default reserved inodes will not be visible to user
as regular files.
6) The quota-tools will need to be modified to support hidden quota
files on ext4. E2fsprogs will also include support for creating and
fixing quota files.
7) Support is only for the new V2 quota file format.
Tested-by: Jan Kara <jack@suse.cz>
Reviewed-by: Jan Kara <jack@suse.cz>
Reviewed-by: Johann Lombardi <johann@whamcloud.com>
Signed-off-by: Aditya Kali <adityakali@google.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2012-07-22 20:21:31 -04:00
|
|
|
|
|
|
|
|
|
2016-09-05 23:08:16 -04:00
|
|
|
|
|
|
|
|
|
ext4: make quota as first class supported feature
This patch adds support for quotas as a first class feature in ext4;
which is to say, the quota files are stored in hidden inodes as file
system metadata, instead of as separate files visible in the file system
directory hierarchy.
It is based on the proposal at:
https://ext4.wiki.kernel.org/index.php/Design_For_1st_Class_Quota_in_Ext4
This patch introduces a new feature - EXT4_FEATURE_RO_COMPAT_QUOTA
which, when turned on, enables quota accounting at mount time
iteself. Also, the quota inodes are stored in two additional superblock
fields. Some changes introduced by this patch that should be pointed
out are:
1) Two new ext4-superblock fields - s_usr_quota_inum and
s_grp_quota_inum for storing the quota inodes in use.
2) Default quota inodes are: inode#3 for tracking userquota and inode#4
for tracking group quota. The superblock fields can be set to use
other inodes as well.
3) If the QUOTA feature and corresponding quota inodes are set in
superblock, the quota usage tracking is turned on at mount time. On
'quotaon' ioctl, the quota limits enforcement is turned
on. 'quotaoff' ioctl turns off only the limits enforcement in this
case.
4) When QUOTA feature is in use, the quota mount options 'quota',
'usrquota', 'grpquota' are ignored by the kernel.
5) mke2fs or tune2fs can be used to set the QUOTA feature and initialize
quota inodes. The default reserved inodes will not be visible to user
as regular files.
6) The quota-tools will need to be modified to support hidden quota
files on ext4. E2fsprogs will also include support for creating and
fixing quota files.
7) Support is only for the new V2 quota file format.
Tested-by: Jan Kara <jack@suse.cz>
Reviewed-by: Jan Kara <jack@suse.cz>
Reviewed-by: Johann Lombardi <johann@whamcloud.com>
Signed-off-by: Aditya Kali <adityakali@google.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2012-07-22 20:21:31 -04:00
|
|
|
|
|
|
|
|
|
2013-01-24 23:24:54 -05:00
|
|
|
|
|
|
|
|
|
|
|
|
|
|
ext4: make quota as first class supported feature
This patch adds support for quotas as a first class feature in ext4;
which is to say, the quota files are stored in hidden inodes as file
system metadata, instead of as separate files visible in the file system
directory hierarchy.
It is based on the proposal at:
https://ext4.wiki.kernel.org/index.php/Design_For_1st_Class_Quota_in_Ext4
This patch introduces a new feature - EXT4_FEATURE_RO_COMPAT_QUOTA
which, when turned on, enables quota accounting at mount time
iteself. Also, the quota inodes are stored in two additional superblock
fields. Some changes introduced by this patch that should be pointed
out are:
1) Two new ext4-superblock fields - s_usr_quota_inum and
s_grp_quota_inum for storing the quota inodes in use.
2) Default quota inodes are: inode#3 for tracking userquota and inode#4
for tracking group quota. The superblock fields can be set to use
other inodes as well.
3) If the QUOTA feature and corresponding quota inodes are set in
superblock, the quota usage tracking is turned on at mount time. On
'quotaon' ioctl, the quota limits enforcement is turned
on. 'quotaoff' ioctl turns off only the limits enforcement in this
case.
4) When QUOTA feature is in use, the quota mount options 'quota',
'usrquota', 'grpquota' are ignored by the kernel.
5) mke2fs or tune2fs can be used to set the QUOTA feature and initialize
quota inodes. The default reserved inodes will not be visible to user
as regular files.
6) The quota-tools will need to be modified to support hidden quota
files on ext4. E2fsprogs will also include support for creating and
fixing quota files.
7) Support is only for the new V2 quota file format.
Tested-by: Jan Kara <jack@suse.cz>
Reviewed-by: Jan Kara <jack@suse.cz>
Reviewed-by: Johann Lombardi <johann@whamcloud.com>
Signed-off-by: Aditya Kali <adityakali@google.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2012-07-22 20:21:31 -04:00
|
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|
2010-08-01 17:48:36 -04:00
|
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2011-04-04 15:33:39 -04:00
|
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2010-11-08 13:47:33 -05:00
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2010-08-01 17:48:36 -04:00
|
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2011-05-16 09:59:13 -04:00
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2011-04-04 15:33:39 -04:00
|
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|
2013-02-08 21:59:22 -05:00
|
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|
2011-04-04 15:33:39 -04:00
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2010-08-01 17:48:36 -04:00
|
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2006-10-11 01:20:50 -07:00
|
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2011-03-30 22:57:33 -03:00
|
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2006-10-11 01:20:50 -07:00
|
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2006-10-11 01:20:53 -07:00
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2006-10-11 01:20:50 -07:00
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2008-01-28 23:58:27 -05:00
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2006-10-11 01:20:50 -07:00
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2014-08-29 20:52:15 -04:00
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2006-10-11 01:20:50 -07:00
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2006-10-11 01:20:53 -07:00
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2006-10-11 01:20:50 -07:00
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2008-01-28 23:58:27 -05:00
|
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|
2014-08-29 20:52:15 -04:00
|
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|
2015-06-21 01:25:29 -04:00
|
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|
2006-10-11 01:20:50 -07:00
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2009-01-07 00:06:22 -05:00
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2009-06-04 17:36:36 -04:00
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2007-09-11 15:23:29 -07:00
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2010-03-02 08:08:51 -05:00
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2015-06-21 01:25:29 -04:00
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2014-08-29 20:52:15 -04:00
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2010-03-02 08:08:51 -05:00
|
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2014-05-12 22:06:43 -04:00
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2010-07-27 11:56:07 -04:00
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2014-08-29 20:52:15 -04:00
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2006-10-11 01:20:50 -07:00
|
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2010-03-02 08:08:51 -05:00
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2010-07-27 11:56:07 -04:00
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2010-03-02 08:08:51 -05:00
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2006-10-11 01:20:50 -07:00
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2010-03-02 08:08:51 -05:00
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2006-10-11 01:20:53 -07:00
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2011-04-04 15:33:39 -04:00
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2006-10-11 01:20:50 -07:00
|
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2010-03-02 08:08:51 -05:00
|
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|
2006-10-11 01:20:50 -07:00
|
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2016-04-01 12:00:03 -04:00
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2006-10-11 01:20:50 -07:00
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2010-07-25 00:46:55 +04:00
|
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2006-10-11 01:20:50 -07:00
|
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2010-07-25 00:46:55 +04:00
|
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|
2006-10-11 01:20:50 -07:00
|
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2015-06-18 16:52:29 +02:00
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2009-12-07 14:08:51 -05:00
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2011-04-18 17:29:14 -04:00
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2015-10-17 16:18:43 -04:00
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2011-04-18 17:29:14 -04:00
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2015-10-17 16:18:43 -04:00
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2011-04-18 17:29:14 -04:00
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2009-12-07 14:08:51 -05:00
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2011-04-18 17:29:14 -04:00
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2009-12-07 14:08:51 -05:00
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2011-04-18 17:29:14 -04:00
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2015-10-17 16:18:43 -04:00
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2011-04-18 17:29:14 -04:00
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2015-10-17 16:18:43 -04:00
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2011-04-18 17:29:14 -04:00
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2015-10-17 16:18:43 -04:00
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2011-04-18 17:29:14 -04:00
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2009-12-07 14:08:51 -05:00
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2008-10-10 20:02:48 -04:00
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2010-07-25 00:46:55 +04:00
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2008-10-10 20:02:48 -04:00
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2013-03-02 19:39:14 -08:00
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2008-10-10 20:02:48 -04:00
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ext4: serialize unaligned asynchronous DIO
ext4 has a data corruption case when doing non-block-aligned
asynchronous direct IO into a sparse file, as demonstrated
by xfstest 240.
The root cause is that while ext4 preallocates space in the
hole, mappings of that space still look "new" and
dio_zero_block() will zero out the unwritten portions. When
more than one AIO thread is going, they both find this "new"
block and race to zero out their portion; this is uncoordinated
and causes data corruption.
Dave Chinner fixed this for xfs by simply serializing all
unaligned asynchronous direct IO. I've done the same here.
The difference is that we only wait on conversions, not all IO.
This is a very big hammer, and I'm not very pleased with
stuffing this into ext4_file_write(). But since ext4 is
DIO_LOCKING, we need to serialize it at this high level.
I tried to move this into ext4_ext_direct_IO, but by then
we have the i_mutex already, and we will wait on the
work queue to do conversions - which must also take the
i_mutex. So that won't work.
This was originally exposed by qemu-kvm installing to
a raw disk image with a normal sector-63 alignment. I've
tested a backport of this patch with qemu, and it does
avoid the corruption. It is also quite a lot slower
(14 min for package installs, vs. 8 min for well-aligned)
but I'll take slow correctness over fast corruption any day.
Mingming suggested that we can track outstanding
conversions, and wait on those so that non-sparse
files won't be affected, and I've implemented that here;
unaligned AIO to nonsparse files won't take a perf hit.
[tytso@mit.edu: Keep the mutex as a hashed array instead
of bloating the ext4 inode]
[tytso@mit.edu: Fix up namespace issues so that global
variables are protected with an "ext4_" prefix.]
Signed-off-by: Eric Sandeen <sandeen@redhat.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2011-02-12 08:17:34 -05:00
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2010-10-27 21:30:14 -04:00
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2006-10-11 01:20:50 -07:00
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ext4: serialize unaligned asynchronous DIO
ext4 has a data corruption case when doing non-block-aligned
asynchronous direct IO into a sparse file, as demonstrated
by xfstest 240.
The root cause is that while ext4 preallocates space in the
hole, mappings of that space still look "new" and
dio_zero_block() will zero out the unwritten portions. When
more than one AIO thread is going, they both find this "new"
block and race to zero out their portion; this is uncoordinated
and causes data corruption.
Dave Chinner fixed this for xfs by simply serializing all
unaligned asynchronous direct IO. I've done the same here.
The difference is that we only wait on conversions, not all IO.
This is a very big hammer, and I'm not very pleased with
stuffing this into ext4_file_write(). But since ext4 is
DIO_LOCKING, we need to serialize it at this high level.
I tried to move this into ext4_ext_direct_IO, but by then
we have the i_mutex already, and we will wait on the
work queue to do conversions - which must also take the
i_mutex. So that won't work.
This was originally exposed by qemu-kvm installing to
a raw disk image with a normal sector-63 alignment. I've
tested a backport of this patch with qemu, and it does
avoid the corruption. It is also quite a lot slower
(14 min for package installs, vs. 8 min for well-aligned)
but I'll take slow correctness over fast corruption any day.
Mingming suggested that we can track outstanding
conversions, and wait on those so that non-sparse
files won't be affected, and I've implemented that here;
unaligned AIO to nonsparse files won't take a perf hit.
[tytso@mit.edu: Keep the mutex as a hashed array instead
of bloating the ext4 inode]
[tytso@mit.edu: Fix up namespace issues so that global
variables are protected with an "ext4_" prefix.]
Signed-off-by: Eric Sandeen <sandeen@redhat.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2011-02-12 08:17:34 -05:00
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2008-01-29 00:19:52 -05:00
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2015-08-15 14:59:44 -04:00
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2012-03-20 22:05:02 -04:00
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ext4: ensure Inode flags consistency are checked at build time
Flags being used by atomic operations in inode flags (e.g.
ext4_test_inode_flag(), should be consistent with that actually stored
in inodes, i.e.: EXT4_XXX_FL.
It ensures that this consistency is checked at build-time, not at
run-time.
Currently, the flags consistency are being checked at run-time, but,
there is no real reason to not do a build-time check instead of a
run-time check. The code is comparing macro defined values with enum
type variables, where both are constants, so, there is no problem in
comparing constants at build-time.
enum variables are treated as constants by the C compiler, according
to the C99 specs (see www.open-std.org/jtc1/sc22/wg14/www/docs/n1124.pdf
sec. 6.2.5, item 16), so, there is no real problem in comparing an
enumeration type at build time
Signed-off-by: Carlos Maiolino <cmaiolino@redhat.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2012-12-10 16:30:45 -05:00
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2010-05-16 22:00:00 -04:00
|
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|
ext4: serialize unaligned asynchronous DIO
ext4 has a data corruption case when doing non-block-aligned
asynchronous direct IO into a sparse file, as demonstrated
by xfstest 240.
The root cause is that while ext4 preallocates space in the
hole, mappings of that space still look "new" and
dio_zero_block() will zero out the unwritten portions. When
more than one AIO thread is going, they both find this "new"
block and race to zero out their portion; this is uncoordinated
and causes data corruption.
Dave Chinner fixed this for xfs by simply serializing all
unaligned asynchronous direct IO. I've done the same here.
The difference is that we only wait on conversions, not all IO.
This is a very big hammer, and I'm not very pleased with
stuffing this into ext4_file_write(). But since ext4 is
DIO_LOCKING, we need to serialize it at this high level.
I tried to move this into ext4_ext_direct_IO, but by then
we have the i_mutex already, and we will wait on the
work queue to do conversions - which must also take the
i_mutex. So that won't work.
This was originally exposed by qemu-kvm installing to
a raw disk image with a normal sector-63 alignment. I've
tested a backport of this patch with qemu, and it does
avoid the corruption. It is also quite a lot slower
(14 min for package installs, vs. 8 min for well-aligned)
but I'll take slow correctness over fast corruption any day.
Mingming suggested that we can track outstanding
conversions, and wait on those so that non-sparse
files won't be affected, and I've implemented that here;
unaligned AIO to nonsparse files won't take a perf hit.
[tytso@mit.edu: Keep the mutex as a hashed array instead
of bloating the ext4 inode]
[tytso@mit.edu: Fix up namespace issues so that global
variables are protected with an "ext4_" prefix.]
Signed-off-by: Eric Sandeen <sandeen@redhat.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2011-02-12 08:17:34 -05:00
|
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2016-03-08 22:44:50 -05:00
|
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|
|
ext4: serialize unaligned asynchronous DIO
ext4 has a data corruption case when doing non-block-aligned
asynchronous direct IO into a sparse file, as demonstrated
by xfstest 240.
The root cause is that while ext4 preallocates space in the
hole, mappings of that space still look "new" and
dio_zero_block() will zero out the unwritten portions. When
more than one AIO thread is going, they both find this "new"
block and race to zero out their portion; this is uncoordinated
and causes data corruption.
Dave Chinner fixed this for xfs by simply serializing all
unaligned asynchronous direct IO. I've done the same here.
The difference is that we only wait on conversions, not all IO.
This is a very big hammer, and I'm not very pleased with
stuffing this into ext4_file_write(). But since ext4 is
DIO_LOCKING, we need to serialize it at this high level.
I tried to move this into ext4_ext_direct_IO, but by then
we have the i_mutex already, and we will wait on the
work queue to do conversions - which must also take the
i_mutex. So that won't work.
This was originally exposed by qemu-kvm installing to
a raw disk image with a normal sector-63 alignment. I've
tested a backport of this patch with qemu, and it does
avoid the corruption. It is also quite a lot slower
(14 min for package installs, vs. 8 min for well-aligned)
but I'll take slow correctness over fast corruption any day.
Mingming suggested that we can track outstanding
conversions, and wait on those so that non-sparse
files won't be affected, and I've implemented that here;
unaligned AIO to nonsparse files won't take a perf hit.
[tytso@mit.edu: Keep the mutex as a hashed array instead
of bloating the ext4 inode]
[tytso@mit.edu: Fix up namespace issues so that global
variables are protected with an "ext4_" prefix.]
Signed-off-by: Eric Sandeen <sandeen@redhat.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2011-02-12 08:17:34 -05:00
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2012-11-08 21:57:32 -05:00
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2009-05-17 15:38:01 -04:00
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2012-11-08 21:57:32 -05:00
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2015-09-23 12:44:17 -04:00
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2012-11-08 21:57:32 -05:00
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|
2010-10-27 21:30:14 -04:00
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2010-10-27 21:30:10 -04:00
|
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|
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2015-09-23 12:44:17 -04:00
|
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2010-10-27 21:30:05 -04:00
|
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2015-09-23 12:44:17 -04:00
|
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2011-02-03 14:33:49 -05:00
|
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2015-09-23 12:44:17 -04:00
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2010-10-27 21:30:05 -04:00
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2010-10-27 21:30:14 -04:00
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2008-01-29 00:19:52 -05:00
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2006-10-11 01:20:50 -07:00
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2009-12-07 14:08:51 -05:00
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2011-04-18 17:29:14 -04:00
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2008-10-10 20:02:48 -04:00
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2006-10-11 01:20:50 -07:00
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ext4: add support for lazy inode table initialization
When the lazy_itable_init extended option is passed to mke2fs, it
considerably speeds up filesystem creation because inode tables are
not zeroed out. The fact that parts of the inode table are
uninitialized is not a problem so long as the block group descriptors,
which contain information regarding how much of the inode table has
been initialized, has not been corrupted However, if the block group
checksums are not valid, e2fsck must scan the entire inode table, and
the the old, uninitialized data could potentially cause e2fsck to
report false problems.
Hence, it is important for the inode tables to be initialized as soon
as possble. This commit adds this feature so that mke2fs can safely
use the lazy inode table initialization feature to speed up formatting
file systems.
This is done via a new new kernel thread called ext4lazyinit, which is
created on demand and destroyed, when it is no longer needed. There
is only one thread for all ext4 filesystems in the system. When the
first filesystem with inititable mount option is mounted, ext4lazyinit
thread is created, then the filesystem can register its request in the
request list.
This thread then walks through the list of requests picking up
scheduled requests and invoking ext4_init_inode_table(). Next schedule
time for the request is computed by multiplying the time it took to
zero out last inode table with wait multiplier, which can be set with
the (init_itable=n) mount option (default is 10). We are doing
this so we do not take the whole I/O bandwidth. When the thread is no
longer necessary (request list is empty) it frees the appropriate
structures and exits (and can be created later later by another
filesystem).
We do not disturb regular inode allocations in any way, it just do not
care whether the inode table is, or is not zeroed. But when zeroing, we
have to skip used inodes, obviously. Also we should prevent new inode
allocations from the group, while zeroing is on the way. For that we
take write alloc_sem lock in ext4_init_inode_table() and read alloc_sem
in the ext4_claim_inode, so when we are unlucky and allocator hits the
group which is currently being zeroed, it just has to wait.
This can be suppresed using the mount option no_init_itable.
Signed-off-by: Lukas Czerner <lczerner@redhat.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2010-10-27 21:30:05 -04:00
|
|
|
|
2006-10-11 01:20:50 -07:00
|
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|
|
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|
|
|
2009-12-07 14:08:51 -05:00
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|
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2006-10-11 01:20:50 -07:00
|
|
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|
|
2010-10-27 21:30:14 -04:00
|
|
|
|
2014-03-18 19:24:49 -04:00
|
|
|
|
2015-09-23 12:44:17 -04:00
|
|
|
|
|
|
|
|
|
2010-10-27 21:30:14 -04:00
|
|
|
|
2015-09-23 12:44:17 -04:00
|
|
|
|
2010-10-27 21:30:14 -04:00
|
|
|
|
2015-09-23 12:44:17 -04:00
|
|
|
|
2012-11-08 21:57:32 -05:00
|
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2006-10-11 01:20:50 -07:00
|
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2010-10-27 21:30:14 -04:00
|
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|
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2006-10-11 01:20:50 -07:00
|
|
|
|
ext4: add support for lazy inode table initialization
When the lazy_itable_init extended option is passed to mke2fs, it
considerably speeds up filesystem creation because inode tables are
not zeroed out. The fact that parts of the inode table are
uninitialized is not a problem so long as the block group descriptors,
which contain information regarding how much of the inode table has
been initialized, has not been corrupted However, if the block group
checksums are not valid, e2fsck must scan the entire inode table, and
the the old, uninitialized data could potentially cause e2fsck to
report false problems.
Hence, it is important for the inode tables to be initialized as soon
as possble. This commit adds this feature so that mke2fs can safely
use the lazy inode table initialization feature to speed up formatting
file systems.
This is done via a new new kernel thread called ext4lazyinit, which is
created on demand and destroyed, when it is no longer needed. There
is only one thread for all ext4 filesystems in the system. When the
first filesystem with inititable mount option is mounted, ext4lazyinit
thread is created, then the filesystem can register its request in the
request list.
This thread then walks through the list of requests picking up
scheduled requests and invoking ext4_init_inode_table(). Next schedule
time for the request is computed by multiplying the time it took to
zero out last inode table with wait multiplier, which can be set with
the (init_itable=n) mount option (default is 10). We are doing
this so we do not take the whole I/O bandwidth. When the thread is no
longer necessary (request list is empty) it frees the appropriate
structures and exits (and can be created later later by another
filesystem).
We do not disturb regular inode allocations in any way, it just do not
care whether the inode table is, or is not zeroed. But when zeroing, we
have to skip used inodes, obviously. Also we should prevent new inode
allocations from the group, while zeroing is on the way. For that we
take write alloc_sem lock in ext4_init_inode_table() and read alloc_sem
in the ext4_claim_inode, so when we are unlucky and allocator hits the
group which is currently being zeroed, it just has to wait.
This can be suppresed using the mount option no_init_itable.
Signed-off-by: Lukas Czerner <lczerner@redhat.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2010-10-27 21:30:05 -04:00
|
|
|
|
2009-12-07 14:08:51 -05:00
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2008-10-10 20:02:48 -04:00
|
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2006-10-11 01:20:50 -07:00
|
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2010-10-27 21:30:14 -04:00
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2015-09-23 12:44:17 -04:00
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2010-10-27 21:30:14 -04:00
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2013-07-26 15:21:11 -04:00
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2006-10-11 01:20:50 -07:00
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2009-01-06 14:53:16 -05:00
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2006-10-11 01:20:50 -07:00
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2010-10-27 21:30:14 -04:00
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