xfs: handle reconnecting metadir subdirectories

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A longstanding weakness of the metapath repair code is that it can only
reattach non-directories to the metadata directory tree.  Let's fix
that by allowing reconnection of subdirectories.

Note that with the initial users of metadir (rtgroups and quota),
there's no way to mount a filesystem with broken /rtgroups or /quota
subdirectories, so this code won't be all that useful until something
adds deeper directory trees.  But we shouldn't leave a logic bomb for
those futures users wherein we get the link count wrong for a subdir.

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

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Darrick J. Wong 2026-08-26 22:32:12 -07:00 • committed by Carlos Maiolino

parent cdc4a083ad

commit 9dd6cc92a7

1 changed files with 82 additions and 1 deletions

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fs/xfs/scrub/metapath.c

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