2005-04-16 15:20:36 -07:00
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2005-09-06 15:16:54 -07:00
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2005-04-16 15:20:36 -07:00
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2005-09-06 15:16:54 -07:00
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2005-04-16 15:20:36 -07:00
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2005-06-23 22:05:26 -07:00
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2005-04-16 15:20:36 -07:00
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2006-06-23 02:02:58 -07:00
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2005-04-16 15:20:36 -07:00
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2006-12-06 20:33:20 -08:00
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2005-04-16 15:20:36 -07:00
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2006-12-06 20:33:17 -08:00
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2005-04-16 15:20:36 -07:00
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2006-12-06 20:33:20 -08:00
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2005-04-16 15:20:36 -07:00
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2006-03-24 03:16:06 -08:00
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2005-04-16 15:20:36 -07:00
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2006-09-27 01:49:40 -07:00
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2005-04-16 15:20:36 -07:00
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2005-09-06 15:16:54 -07:00
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2006-02-03 03:04:25 -08:00
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2005-09-06 15:16:54 -07:00
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2005-04-16 15:20:36 -07:00
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2007-02-12 00:55:41 -08:00
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2005-04-16 15:20:36 -07:00
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[PATCH] ext2 corruption - regression between 2.6.9 and 2.6.10
Whilst trying to stress test a Promise SX8 card, we stumbled across
some nasty filesystem corruption in ext2. Our tests involved
creating an ext2 partition, mounting, running several concurrent
fsx's over it, umounting, and fsck'ing, all scripted[1]. The fsck
would always return with errors.
This regression was traced back to a change between 2.6.9 and
2.6.10, which moves the functionality of ext2_put_inode into
ext2_clear_inode. The attached patch reverses this change, and
eliminated the source of corruption.
Mingming Cao <cmm@us.ibm.com> said:
I think his patch for ext2 is correct. The corruption on ext3 is not the same
issue he saw on ext2. I believe that's the race between discard reservation
and reservation in-use that we already fixed it in 2.6.12- rc1.
For the problem related to ext2, at the time when we design reservation for
ext3, we decide we only need to discard the reservation at the last file
close, so we have ext3_discard_reservation on iput_final- >ext3_clear_inode.
The ext2 handle discard preallocation differently at that time, it discard the
preallocation at each iput(), not in input_final(), so we think it's
unnecessary to thrash it so frequently, and the right thing to do, as we did
for ext3 reservation, discard preallocation on last iput(). So we moved the
ext2_discard_preallocation from ext2_put_inode(0 to ext2_clear_inode.
Since ext2 preallocation is doing pre-allocation on disk, so it is possible
that at the unmount time, someone is still hold the reference of the inode, so
the preallocation for a file is not discard yet, so we still mark those blocks
allocated on disk, while they are not actually in the inode's block map, so
fsck will catch/fix that error later.
This is not a issue for ext3, as ext3 reservation(pre-allocation) is done in
memory.
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-04-16 15:25:45 -07:00
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2005-04-16 15:20:36 -07:00
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2005-09-06 15:16:54 -07:00
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2005-04-16 15:20:36 -07:00
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2006-09-16 12:15:37 -07:00
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2005-04-16 15:20:36 -07:00
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2006-09-16 12:15:37 -07:00
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2005-04-16 15:20:36 -07:00
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2005-09-06 15:16:54 -07:00
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2005-11-08 21:34:59 -08:00
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2005-09-06 15:16:54 -07:00
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2005-04-16 15:20:36 -07:00
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2005-06-23 22:05:26 -07:00
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2005-09-06 15:16:54 -07:00
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2005-04-16 15:20:36 -07:00
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2005-09-06 15:16:54 -07:00
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2005-04-16 15:20:36 -07:00
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2006-10-11 01:21:50 -07:00
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2005-04-16 15:20:36 -07:00
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2006-10-11 01:21:50 -07:00
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2005-04-16 15:20:36 -07:00
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2006-10-11 01:21:50 -07:00
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2005-04-16 15:20:36 -07:00
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2005-06-23 22:05:26 -07:00
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2005-09-06 15:16:54 -07:00
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2005-04-16 15:20:36 -07:00
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2006-09-27 01:49:30 -07:00
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2005-04-16 15:20:36 -07:00
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2006-09-27 01:49:30 -07:00
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2005-04-16 15:20:36 -07:00
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2006-09-27 01:49:30 -07:00
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2005-04-16 15:20:36 -07:00
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2006-09-27 01:49:30 -07:00
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2005-04-16 15:20:36 -07:00
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2006-09-27 01:49:30 -07:00
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2005-04-16 15:20:36 -07:00
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2006-09-27 01:49:30 -07:00
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2005-04-16 15:20:36 -07:00
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2006-09-27 01:49:37 -07:00
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2005-04-16 15:20:36 -07:00
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2007-02-10 01:46:13 -08:00
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2005-04-16 15:20:36 -07:00
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2007-02-10 01:46:13 -08:00
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2005-04-16 15:20:36 -07:00
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2007-02-10 01:46:13 -08:00
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2005-04-16 15:20:36 -07:00
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2006-10-11 01:21:50 -07:00
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2005-04-16 15:20:36 -07:00
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2005-06-23 22:05:26 -07:00
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2005-04-16 15:20:36 -07:00
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2005-06-23 22:05:26 -07:00
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2005-04-16 15:20:36 -07:00
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2006-08-27 01:23:43 -07:00
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2005-04-16 15:20:36 -07:00
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2006-12-08 02:37:49 -08:00
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2005-04-16 15:20:36 -07:00
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2006-12-08 02:37:49 -08:00
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2005-04-16 15:20:36 -07:00
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2006-09-27 01:49:30 -07:00
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2005-04-16 15:20:36 -07:00
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2006-06-23 02:05:41 -07:00
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2005-04-16 15:20:36 -07:00
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2006-06-23 02:05:41 -07:00
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2005-04-16 15:20:36 -07:00
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2006-06-23 02:05:41 -07:00
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2005-04-16 15:20:36 -07:00
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2005-11-13 16:07:36 -08:00
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2005-04-16 15:20:36 -07:00
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2006-06-23 02:05:41 -07:00
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2005-04-16 15:20:36 -07:00
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2005-06-23 22:05:26 -07:00
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2005-07-12 13:58:29 -07:00
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2005-04-16 15:20:36 -07:00
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2005-07-12 13:58:29 -07:00
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2005-04-16 15:20:36 -07:00
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2005-06-23 22:05:26 -07:00
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2005-04-16 15:20:36 -07:00
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2005-07-12 13:58:29 -07:00
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2005-04-16 15:20:36 -07:00
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2005-07-12 13:58:29 -07:00
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2005-04-16 15:20:36 -07:00
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2006-06-23 02:02:58 -07:00
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2005-04-16 15:20:36 -07:00
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2006-06-23 02:02:58 -07:00
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2005-04-16 15:20:36 -07:00
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2006-12-06 20:35:27 -08:00
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2005-04-16 15:20:36 -07:00
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2006-12-06 20:35:27 -08:00
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2005-04-16 15:20:36 -07:00
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2006-12-06 20:35:27 -08:00
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2005-04-16 15:20:36 -07:00
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2006-12-06 20:35:27 -08:00
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2005-04-16 15:20:36 -07:00
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2006-12-06 20:35:27 -08:00
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2005-04-16 15:20:36 -07:00
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2006-12-06 20:35:27 -08:00
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2005-04-16 15:20:36 -07:00
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2006-12-06 20:35:27 -08:00
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2005-04-16 15:20:36 -07:00
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[PATCH] VFS: Permit filesystem to override root dentry on mount
Extend the get_sb() filesystem operation to take an extra argument that
permits the VFS to pass in the target vfsmount that defines the mountpoint.
The filesystem is then required to manually set the superblock and root dentry
pointers. For most filesystems, this should be done with simple_set_mnt()
which will set the superblock pointer and then set the root dentry to the
superblock's s_root (as per the old default behaviour).
The get_sb() op now returns an integer as there's now no need to return the
superblock pointer.
This patch permits a superblock to be implicitly shared amongst several mount
points, such as can be done with NFS to avoid potential inode aliasing. In
such a case, simple_set_mnt() would not be called, and instead the mnt_root
and mnt_sb would be set directly.
The patch also makes the following changes:
(*) the get_sb_*() convenience functions in the core kernel now take a vfsmount
pointer argument and return an integer, so most filesystems have to change
very little.
(*) If one of the convenience function is not used, then get_sb() should
normally call simple_set_mnt() to instantiate the vfsmount. This will
always return 0, and so can be tail-called from get_sb().
(*) generic_shutdown_super() now calls shrink_dcache_sb() to clean up the
dcache upon superblock destruction rather than shrink_dcache_anon().
This is required because the superblock may now have multiple trees that
aren't actually bound to s_root, but that still need to be cleaned up. The
currently called functions assume that the whole tree is rooted at s_root,
and that anonymous dentries are not the roots of trees which results in
dentries being left unculled.
However, with the way NFS superblock sharing are currently set to be
implemented, these assumptions are violated: the root of the filesystem is
simply a dummy dentry and inode (the real inode for '/' may well be
inaccessible), and all the vfsmounts are rooted on anonymous[*] dentries
with child trees.
[*] Anonymous until discovered from another tree.
(*) The documentation has been adjusted, including the additional bit of
changing ext2_* into foo_* in the documentation.
[akpm@osdl.org: convert ipath_fs, do other stuff]
Signed-off-by: David Howells <dhowells@redhat.com>
Acked-by: Al Viro <viro@zeniv.linux.org.uk>
Cc: Nathan Scott <nathans@sgi.com>
Cc: Roland Dreier <rolandd@cisco.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-06-23 02:02:57 -07:00
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2005-04-16 15:20:36 -07:00
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|
[PATCH] VFS: Permit filesystem to override root dentry on mount
Extend the get_sb() filesystem operation to take an extra argument that
permits the VFS to pass in the target vfsmount that defines the mountpoint.
The filesystem is then required to manually set the superblock and root dentry
pointers. For most filesystems, this should be done with simple_set_mnt()
which will set the superblock pointer and then set the root dentry to the
superblock's s_root (as per the old default behaviour).
The get_sb() op now returns an integer as there's now no need to return the
superblock pointer.
This patch permits a superblock to be implicitly shared amongst several mount
points, such as can be done with NFS to avoid potential inode aliasing. In
such a case, simple_set_mnt() would not be called, and instead the mnt_root
and mnt_sb would be set directly.
The patch also makes the following changes:
(*) the get_sb_*() convenience functions in the core kernel now take a vfsmount
pointer argument and return an integer, so most filesystems have to change
very little.
(*) If one of the convenience function is not used, then get_sb() should
normally call simple_set_mnt() to instantiate the vfsmount. This will
always return 0, and so can be tail-called from get_sb().
(*) generic_shutdown_super() now calls shrink_dcache_sb() to clean up the
dcache upon superblock destruction rather than shrink_dcache_anon().
This is required because the superblock may now have multiple trees that
aren't actually bound to s_root, but that still need to be cleaned up. The
currently called functions assume that the whole tree is rooted at s_root,
and that anonymous dentries are not the roots of trees which results in
dentries being left unculled.
However, with the way NFS superblock sharing are currently set to be
implemented, these assumptions are violated: the root of the filesystem is
simply a dummy dentry and inode (the real inode for '/' may well be
inaccessible), and all the vfsmounts are rooted on anonymous[*] dentries
with child trees.
[*] Anonymous until discovered from another tree.
(*) The documentation has been adjusted, including the additional bit of
changing ext2_* into foo_* in the documentation.
[akpm@osdl.org: convert ipath_fs, do other stuff]
Signed-off-by: David Howells <dhowells@redhat.com>
Acked-by: Al Viro <viro@zeniv.linux.org.uk>
Cc: Nathan Scott <nathans@sgi.com>
Cc: Roland Dreier <rolandd@cisco.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-06-23 02:02:57 -07:00
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2005-04-16 15:20:36 -07:00
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2006-07-03 00:25:20 -07:00
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2005-04-16 15:20:36 -07:00
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2006-01-09 15:59:24 -08:00
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2005-04-16 15:20:36 -07:00
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