diff options
| author | Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp> | 2009-04-06 19:01:47 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2009-04-07 08:31:17 -0700 |
| commit | b028fcfc4cd198a6aa1ffcfb872073ccc1db3459 (patch) | |
| tree | d6a89ba7cf253ab1738d5295f557b77e77ac4311 /fs/nilfs2/cpfile.h | |
| parent | 85ef9cea02882baedd1e65336cf3dd292841dde3 (diff) | |
nilfs2: fix gc failure on volumes keeping numerous snapshots
This resolves the following failure of nilfs2 cleaner daemon:
nilfs_cleanerd[20670]: cannot clean segments: No such file or directory
nilfs_cleanerd[20670]: shutdown
When creating thousands of snapshots, the cleaner daemon had rarely died
as above due to an error returned from the kernel code.
After applying the recent patch which fixed memory allocation problems in
ioctl (Message-Id: <20081215.155840.105124170.ryusuke@osrg.net>), the
problem gets more frequent.
It turned out to be a bug of nilfs_ioctl_wrap_copy function and one of its
callback routines to read out information of snapshots; if the
nilfs_ioctl_wrap_copy function divided a large read request into multiple
requests, the second and later requests have failed since a restart
position on snapshot meta data was not properly set forward.
It's a deficiency of the callback interface that cannot pass the restart
position among multiple requests. This patch fixes the issue by allowing
nilfs_ioctl_wrap_copy and snapshot read functions to exchange a position
argument.
Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'fs/nilfs2/cpfile.h')
| -rw-r--r-- | fs/nilfs2/cpfile.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/fs/nilfs2/cpfile.h b/fs/nilfs2/cpfile.h index f097e90fcb2..1a8a1008c34 100644 --- a/fs/nilfs2/cpfile.h +++ b/fs/nilfs2/cpfile.h @@ -39,7 +39,7 @@ int nilfs_cpfile_delete_checkpoint(struct inode *, __u64); int nilfs_cpfile_change_cpmode(struct inode *, __u64, int); int nilfs_cpfile_is_snapshot(struct inode *, __u64); int nilfs_cpfile_get_stat(struct inode *, struct nilfs_cpstat *); -ssize_t nilfs_cpfile_get_cpinfo(struct inode *, __u64, int, +ssize_t nilfs_cpfile_get_cpinfo(struct inode *, __u64 *, int, struct nilfs_cpinfo *, size_t); #endif /* _NILFS_CPFILE_H */ |