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| author | Chandan Babu R <chandanrlinux@gmail.com> | 2021-01-23 03:48:12 +0300 |
|---|---|---|
| committer | Darrick J. Wong <djwong@kernel.org> | 2021-01-23 03:54:47 +0300 |
| commit | f5d92749191402c50e32ac83dd9da3b910f5680f (patch) | |
| tree | 7c74e4d26fc97b7890af4f35302fbbfd8fd4fea6 /fs/xfs/xfs_inode.c | |
| parent | 85ef08b5a667615bc7be5058259753dc42a7adcd (diff) | |
| download | linux-f5d92749191402c50e32ac83dd9da3b910f5680f.tar.xz | |
xfs: Check for extent overflow when adding dir entries
Directory entry addition can cause the following,
1. Data block can be added/removed.
A new extent can cause extent count to increase by 1.
2. Free disk block can be added/removed.
Same behaviour as described above for Data block.
3. Dabtree blocks.
XFS_DA_NODE_MAXDEPTH blocks can be added. Each of these
can be new extents. Hence extent count can increase by
XFS_DA_NODE_MAXDEPTH.
Signed-off-by: Chandan Babu R <chandanrlinux@gmail.com>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Diffstat (limited to 'fs/xfs/xfs_inode.c')
| -rw-r--r-- | fs/xfs/xfs_inode.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/fs/xfs/xfs_inode.c b/fs/xfs/xfs_inode.c index e5dc41b10ebb..3cb41b5d5a26 100644 --- a/fs/xfs/xfs_inode.c +++ b/fs/xfs/xfs_inode.c @@ -1042,6 +1042,11 @@ xfs_create( if (error) goto out_trans_cancel; + error = xfs_iext_count_may_overflow(dp, XFS_DATA_FORK, + XFS_IEXT_DIR_MANIP_CNT(mp)); + if (error) + goto out_trans_cancel; + /* * A newly created regular or special file just has one directory * entry pointing to them, but a directory also the "." entry @@ -1258,6 +1263,11 @@ xfs_link( xfs_trans_ijoin(tp, sip, XFS_ILOCK_EXCL); xfs_trans_ijoin(tp, tdp, XFS_ILOCK_EXCL); + error = xfs_iext_count_may_overflow(tdp, XFS_DATA_FORK, + XFS_IEXT_DIR_MANIP_CNT(mp)); + if (error) + goto error_return; + /* * If we are using project inheritance, we only allow hard link * creation in our tree when the project IDs are the same; else |