[PATCH 24/28] xfs: check the metadata directory inumber in superblocks

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From: Darrick J. Wong <djwong@xxxxxxxxxx>

When metadata directories are enabled, make sure that the secondary
superblocks point to the metadata directory.  This isn't strictly
required because the secondaries are only used to recover damaged
filesystems, and the metadir root inumber is fixed.

Signed-off-by: Darrick J. Wong <djwong@xxxxxxxxxx>
Reviewed-by: Christoph Hellwig <hch@xxxxxx>
---
 fs/xfs/scrub/agheader.c |    5 +++++
 1 file changed, 5 insertions(+)


diff --git a/fs/xfs/scrub/agheader.c b/fs/xfs/scrub/agheader.c
index 0d50bb0289654a..a9ab6da20e9c8b 100644
--- a/fs/xfs/scrub/agheader.c
+++ b/fs/xfs/scrub/agheader.c
@@ -144,6 +144,11 @@ xchk_superblock(
 	if (sb->sb_rootino != cpu_to_be64(mp->m_sb.sb_rootino))
 		xchk_block_set_preen(sc, bp);
 
+	if (xfs_has_metadir(sc->mp)) {
+		if (sb->sb_metadirino != cpu_to_be64(mp->m_sb.sb_metadirino))
+			xchk_block_set_preen(sc, bp);
+	}
+
 	if (sb->sb_rbmino != cpu_to_be64(mp->m_sb.sb_rbmino))
 		xchk_block_set_preen(sc, bp);
 





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