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xfs: correctly decrement the extent buffer index in xfs_bmap_del_extent 

The code in xfs_bmap_del_extent does not correctly decrement the
extent buffer index when deleting a whole extent.  Most of the time
this gets caught by checks in xfs_bmapi that work around it and
decrement it manually and thus wasn't noticed so far.

Based on an earlier patch from Lachlan McIlroy.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Lachlan McIlroy <lmcilroy@redhat.com>
Signed-off-by: Alex Elder <aelder@sgi.com>
This commit is contained in:
Christoph Hellwig 2011-05-11 15:04:05 +00:00 committed by Alex Elder
parent 87bef1812d
commit 233eebb9a9
1 changed files with 2 additions and 0 deletions
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2
fs/xfs/xfs_bmap.c
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@ -2916,8 +2916,10 @@ xfs_bmap_del_extent(
*/
xfs_iext_remove(ip, *idx, 1,
whichfork == XFS_ATTR_FORK ? BMAP_ATTRFORK : 0);
--*idx;
if (delay)
break;
XFS_IFORK_NEXT_SET(ip, whichfork,
XFS_IFORK_NEXTENTS(ip, whichfork) - 1);
flags |= XFS_ILOG_CORE;