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xfs: Check for extent overflow when punching a hole

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The extent mapping the file offset at which a hole has to be
inserted will be split into two extents causing extent count to
increase by 1.

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>
This commit is contained in:
Chandan Babu R
2021-01-22 16:48:11 -08:00
committed by Darrick J. Wong
parent 727e1acd29
commit 85ef08b5a6
3 changed files with 26 additions and 6 deletions
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10
fs/xfs/xfs_bmap_util.c
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@@ -891,6 +891,11 @@ xfs_unmap_extent(
xfs_trans_ijoin(tp, ip, 0);
error = xfs_iext_count_may_overflow(ip, XFS_DATA_FORK,
XFS_IEXT_PUNCH_HOLE_CNT);
if (error)
goto out_trans_cancel;
error = xfs_bunmapi(tp, ip, startoffset_fsb, len_fsb, 0, 2, done);
if (error)
goto out_trans_cancel;
@@ -1168,6 +1173,11 @@ xfs_insert_file_space(
xfs_ilock(ip, XFS_ILOCK_EXCL);
xfs_trans_ijoin(tp, ip, 0);
error = xfs_iext_count_may_overflow(ip, XFS_DATA_FORK,
XFS_IEXT_PUNCH_HOLE_CNT);
if (error)
goto out_trans_cancel;
/*
* The extent shifting code works on extent granularity. So, if stop_fsb
* is not the starting block of extent, we need to split the extent at