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| author | Darrick J. Wong <darrick.wong@oracle.com> | 2018-07-19 22:29:13 +0300 |
|---|---|---|
| committer | Darrick J. Wong <darrick.wong@oracle.com> | 2018-07-23 19:08:01 +0300 |
| commit | 2e9e6481e2a78de3a85083beccfbf6eda2689922 (patch) | |
| tree | 0154cfaeb88ee991396b590707293c0d3de4befa /fs/xfs/xfs_mount.h | |
| parent | 032d91f9820f6d241dc5584c27a668cfd377aaf0 (diff) | |
| download | linux-2e9e6481e2a78de3a85083beccfbf6eda2689922.tar.xz | |
xfs: detect and fix bad summary counts at mount
Filippo Giunchedi complained that xfs doesn't even perform basic sanity
checks of the fs summary counters at mount time. Therefore, recalculate
the summary counters from the AGFs after log recovery if the counts were
bad (or we had to recover the fs). Enhance the recalculation routine to
fail the mount entirely if the new values are also obviously incorrect.
We use a mount state flag to record the "bad summary count" state so
that the (subsequent) online fsck patches can detect subtlely incorrect
counts and set the flag; clear it userspace asks for a repair; or force
a recalculation at the next mount if nobody fixes it by unmount time.
Reported-by: Filippo Giunchedi <fgiunchedi@wikimedia.org>
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Diffstat (limited to 'fs/xfs/xfs_mount.h')
| -rw-r--r-- | fs/xfs/xfs_mount.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/fs/xfs/xfs_mount.h b/fs/xfs/xfs_mount.h index 245349d1e23f..f08907db9c61 100644 --- a/fs/xfs/xfs_mount.h +++ b/fs/xfs/xfs_mount.h @@ -202,6 +202,7 @@ typedef struct xfs_mount { must be synchronous except for space allocations */ #define XFS_MOUNT_UNMOUNTING (1ULL << 1) /* filesystem is unmounting */ +#define XFS_MOUNT_BAD_SUMMARY (1ULL << 2) /* summary counters are bad */ #define XFS_MOUNT_WAS_CLEAN (1ULL << 3) #define XFS_MOUNT_FS_SHUTDOWN (1ULL << 4) /* atomic stop of all filesystem operations, typically for |