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| author | Dave Chinner <dchinner@redhat.com> | 2016-02-08 10:46:51 +1100 |
|---|---|---|
| committer | Dave Chinner <david@fromorbit.com> | 2016-02-08 10:46:51 +1100 |
| commit | 4b680afb42b9e1b504444583098401a00e63ed3c (patch) | |
| tree | 6170a1d972054795a8a38afa7404dacb1230eaef /fs/xfs/xfs_bmap_util.c | |
| parent | 36f90b0a2ddd60823fe193a85e60ff1906c2a9b3 (diff) | |
| download | linux-0-day-4b680afb42b9e1b504444583098401a00e63ed3c.tar.gz linux-0-day-4b680afb42b9e1b504444583098401a00e63ed3c.tar.xz | |
xfs: lock rt summary inode on allocation
RT allocation can fail on a debug kernel with:
XFS: Assertion failed: xfs_isilocked(ip, XFS_ILOCK_SHARED|XFS_ILOCK_EXCL), file: fs/xfs/libxfs/xfs_bmap.c, line: 4039
When modifying the summary inode during allocation. This occurs
because the summary inode is never locked, and xfs_bmapi_*
operations expect it to be locked. The summary inode is effectively
protected byt he lock on the bitmap inode, so this really is only a
debug kernel issue.
Signed-off-by: Dave Chinner <dchinner@redhat.com>
Tested-by: Ross Zwisler <ross.zwisler@linux.intel.com>
Reviewed-by: Eric Sandeen <sandeen@redhat.com>
Signed-off-by: Dave Chinner <david@fromorbit.com>
Diffstat (limited to 'fs/xfs/xfs_bmap_util.c')
| -rw-r--r-- | fs/xfs/xfs_bmap_util.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/fs/xfs/xfs_bmap_util.c b/fs/xfs/xfs_bmap_util.c index 45ec9e40150c3..07ef29b9b4648 100644 --- a/fs/xfs/xfs_bmap_util.c +++ b/fs/xfs/xfs_bmap_util.c @@ -202,10 +202,12 @@ xfs_bmap_rtalloc( ralen = MAXEXTLEN / mp->m_sb.sb_rextsize; /* - * Lock out other modifications to the RT bitmap inode. + * Lock out modifications to both the RT bitmap and summary inodes */ xfs_ilock(mp->m_rbmip, XFS_ILOCK_EXCL); xfs_trans_ijoin(ap->tp, mp->m_rbmip, XFS_ILOCK_EXCL); + xfs_ilock(mp->m_rsumip, XFS_ILOCK_EXCL); + xfs_trans_ijoin(ap->tp, mp->m_rsumip, XFS_ILOCK_EXCL); /* * If it's an allocation to an empty file at offset 0, |