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| author | Jie Liu <jeff.liu@oracle.com> | 2013-10-25 14:52:44 +0800 |
|---|---|---|
| committer | Ben Myers <bpm@sgi.com> | 2013-10-31 16:43:19 -0500 |
| commit | bb86d21cba22a045b09d11b71decf5ca7c3d5def (patch) | |
| tree | 3de7d5b4537fc3250b01f3ad2e0639ca78167325 /fs/xfs | |
| parent | 10e6e65dfcedff63275c3d649d329c044caa8e26 (diff) | |
| download | linux-bb86d21cba22a045b09d11b71decf5ca7c3d5def.tar.gz linux-bb86d21cba22a045b09d11b71decf5ca7c3d5def.tar.bz2 linux-bb86d21cba22a045b09d11b71decf5ca7c3d5def.zip | |
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.c | 9 |
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++; - } } } } |