xfs: add a method to replace shortform attrs

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If we're trying to replace an xattr in a shortform attr structure and
the old entry fits the new entry, we can just memcpy and exit without
having to delete, compact, and re-add the entry (or worse use the attr
intent machinery).  For parent pointers this only advantages renaming
where the filename length stays the same (e.g. mv autoexec.bat
scandisk.exe) but for regular xattrs it might be useful for updating
security labels and the like.

Signed-off-by: "Darrick J. Wong" <djwong@kernel.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>

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Darrick J. Wong 2026-01-23 09:27:36 -08:00

parent d693534513

commit eaec8aeff3

4 changed files with 44 additions and 0 deletions

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4

fs/xfs/libxfs/xfs_attr.c

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38

fs/xfs/libxfs/xfs_attr_leaf.c

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1

fs/xfs/libxfs/xfs_attr_leaf.h

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1

fs/xfs/xfs_trace.h

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