xfs: Check for extent overflow when adding dir entries

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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>

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Chandan Babu R 2021-01-22 16:48:12 -08:00 • committed by Darrick J. Wong

parent 85ef08b5a6

commit f5d9274919

3 changed files with 28 additions and 0 deletions

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13

fs/xfs/libxfs/xfs_inode_fork.h

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10

fs/xfs/xfs_inode.c

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5

fs/xfs/xfs_symlink.c

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