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authorJie Liu <jeff.liu@oracle.com>2013-10-25 14:52:44 +0800
committerBen Myers <bpm@sgi.com>2013-10-31 16:43:19 -0500
commitbb86d21cba22a045b09d11b71decf5ca7c3d5def (patch)
tree3de7d5b4537fc3250b01f3ad2e0639ca78167325 /fs/xfs
parent10e6e65dfcedff63275c3d649d329c044caa8e26 (diff)
downloadlinux-next-bb86d21cba22a045b09d11b71decf5ca7c3d5def.tar.gz
xfs: fix the extent count when allocating an new indirection array entry
At xfs_iext_add(), if extent(s) are being appended to the last page in the indirection array and the new extent(s) don't fit in the page, the number of extents(erp->er_extcount) in a new allocated entry should be the minimum value between count and XFS_LINEAR_EXTS, instead of count. For now, there is no existing test case can demonstrates a problem with the er_extcount being set incorrectly here, but it obviously like a bug. Signed-off-by: Jie Liu <jeff.liu@oracle.com> Reviewed-by: Ben Myers <bpm@sgi.com> Signed-off-by: Ben Myers <bpm@sgi.com>
Diffstat (limited to 'fs/xfs')
-rw-r--r--fs/xfs/xfs_inode_fork.c9
1 files changed, 4 insertions, 5 deletions
diff --git a/fs/xfs/xfs_inode_fork.c b/fs/xfs/xfs_inode_fork.c
index 22c9837c5d4b..cfee14a83cfe 100644
--- a/fs/xfs/xfs_inode_fork.c
+++ b/fs/xfs/xfs_inode_fork.c
@@ -1021,15 +1021,14 @@ xfs_iext_add(
* the next index needed in the indirection array.
*/
else {
- int count = ext_diff;
+ uint count = ext_diff;
while (count) {
erp = xfs_iext_irec_new(ifp, erp_idx);
- erp->er_extcount = count;
- count -= MIN(count, (int)XFS_LINEAR_EXTS);
- if (count) {
+ erp->er_extcount = min(count, XFS_LINEAR_EXTS);
+ count -= erp->er_extcount;
+ if (count)
erp_idx++;
- }
}
}
}