[25/29] xfs: check the metadata directory inumber in superblocks

Commit Message

Darrick J. Wong Oct. 17, 2024, 6:59 p.m. UTC

From: Darrick J. Wong <[e-mail]>

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 <[e-mail]>
Reviewed-by: Christoph Hellwig <[e-mail]>
---
 fs/xfs/scrub/agheader.c |    5 +++++
 1 file changed, 5 insertions(+)

Patch

diff --git a/fs/xfs/scrub/agheader.c b/fs/xfs/scrub/agheader.c
index f8e5b67128d25a..cad997f38a424c 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);