xfs: Check for extent overflow when adding/removing xattrs

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Adding/removing an xattr can cause XFS_DA_NODE_MAXDEPTH extents to be
added. One extra extent for dabtree in case a local attr is large enough
to cause a double split.  It can also cause extent count to increase
proportional to the size of a remote xattr's value.

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>

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Chandan Babu R 2021-01-22 16:48:13 -08:00 • committed by Darrick J. Wong

parent 02092a2f03

commit 3a19bb147c

2 changed files with 23 additions and 0 deletions

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13

fs/xfs/libxfs/xfs_attr.c

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10

fs/xfs/libxfs/xfs_inode_fork.h

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