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authorDave Chinner <dchinner@redhat.com>2011-12-21 04:07:42 +0400
committerBen Myers <bpm@sgi.com>2012-01-03 21:39:55 +0400
commitb1c770c273a4787069306fc82aab245e9ac72e9d (patch)
tree64337e4ec57722c40a4a9733ab046d5ece2a65f2 /fs/xfs
parent40d344ec5ee440596b1f3ae87556e20c7197757a (diff)
downloadlinux-b1c770c273a4787069306fc82aab245e9ac72e9d.tar.xz
xfs: fix endian conversion issue in discard code
When finding the longest extent in an AG, we read the value directly out of the AGF buffer without endian conversion. This will give an incorrect length, resulting in FITRIM operations potentially not trimming everything that it should. Signed-off-by: Dave Chinner <dchinner@redhat.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Ben Myers <bpm@sgi.com>
Diffstat (limited to 'fs/xfs')
-rw-r--r--fs/xfs/xfs_discard.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/fs/xfs/xfs_discard.c b/fs/xfs/xfs_discard.c
index 8a24f0c6c860..286a051f12cf 100644
--- a/fs/xfs/xfs_discard.c
+++ b/fs/xfs/xfs_discard.c
@@ -68,7 +68,7 @@ xfs_trim_extents(
* Look up the longest btree in the AGF and start with it.
*/
error = xfs_alloc_lookup_le(cur, 0,
- XFS_BUF_TO_AGF(agbp)->agf_longest, &i);
+ be32_to_cpu(XFS_BUF_TO_AGF(agbp)->agf_longest), &i);
if (error)
goto out_del_cursor;
@@ -84,7 +84,7 @@ xfs_trim_extents(
if (error)
goto out_del_cursor;
XFS_WANT_CORRUPTED_GOTO(i == 1, out_del_cursor);
- ASSERT(flen <= XFS_BUF_TO_AGF(agbp)->agf_longest);
+ ASSERT(flen <= be32_to_cpu(XFS_BUF_TO_AGF(agbp)->agf_longest));
/*
* Too small? Give up.