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| author | Chandan Babu R <chandanrlinux@gmail.com> | 2021-01-22 16:48:11 -0800 |
|---|---|---|
| committer | Darrick J. Wong <djwong@kernel.org> | 2021-01-22 16:54:47 -0800 |
| commit | 727e1acd297cae15449607d6e2ee39c71216cf1a (patch) | |
| tree | 3057407785005630e7d01a6a6ed491a5c31fdde8 /fs/xfs/libxfs/xfs_bmap.c | |
| parent | b9b7e1dc56c5ca8d6fc37c410b054e9f26737d2e (diff) | |
| download | lwn-727e1acd297cae15449607d6e2ee39c71216cf1a.tar.gz lwn-727e1acd297cae15449607d6e2ee39c71216cf1a.zip | |
xfs: Check for extent overflow when trivally adding a new extent
When adding a new data extent (without modifying an inode's existing
extents) the extent count increases only by 1. This commit checks for
extent count overflow in such cases.
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Allison Henderson <allison.henderson@oracle.com>
Signed-off-by: Chandan Babu R <chandanrlinux@gmail.com>
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Diffstat (limited to 'fs/xfs/libxfs/xfs_bmap.c')
| -rw-r--r-- | fs/xfs/libxfs/xfs_bmap.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/fs/xfs/libxfs/xfs_bmap.c b/fs/xfs/libxfs/xfs_bmap.c index bc446418e227..32aeacf6f055 100644 --- a/fs/xfs/libxfs/xfs_bmap.c +++ b/fs/xfs/libxfs/xfs_bmap.c @@ -4527,6 +4527,12 @@ xfs_bmapi_convert_delalloc( return error; xfs_ilock(ip, XFS_ILOCK_EXCL); + + error = xfs_iext_count_may_overflow(ip, whichfork, + XFS_IEXT_ADD_NOSPLIT_CNT); + if (error) + goto out_trans_cancel; + xfs_trans_ijoin(tp, ip, 0); if (!xfs_iext_lookup_extent(ip, ifp, offset_fsb, &bma.icur, &bma.got) || |