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xfs: take the ilock around xfs_bmapi_read in xfs_zero_remaining_bytes

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Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
Signed-off-by: Ben Myers <bpm@sgi.com>
This commit is contained in:
Christoph Hellwig 2013-12-06 12:30:12 -08:00 committed by Ben Myers
parent 40194ecc6d
commit 4f317369d4
1 changed files with 6 additions and 0 deletions
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6
fs/xfs/xfs_bmap_util.c
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@ -1173,9 +1173,15 @@ xfs_zero_remaining_bytes(
xfs_buf_unlock(bp);
for (offset = startoff; offset <= endoff; offset = lastoffset + 1) {
uint lock_mode;
offset_fsb = XFS_B_TO_FSBT(mp, offset);
nimap = 1;
lock_mode = xfs_ilock_data_map_shared(ip);
error = xfs_bmapi_read(ip, offset_fsb, 1, &imap, &nimap, 0);
xfs_iunlock(ip, lock_mode);
if (error || nimap < 1)
break;
ASSERT(imap.br_blockcount >= 1);