[PATCH 12/39] xfs: scrub the AGI

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Add a forgotten check to the AGI verifier, then wire up the scrub
infrastructure to check the AGI contents.

Signed-off-by: Darrick J. Wong <darrick.wong@xxxxxxxxxx>
---
 libxfs/xfs_fs.h     |    3 ++-
 libxfs/xfs_ialloc.c |    5 +++++
 2 files changed, 7 insertions(+), 1 deletion(-)


diff --git a/libxfs/xfs_fs.h b/libxfs/xfs_fs.h
index f2ab770..4869803 100644
--- a/libxfs/xfs_fs.h
+++ b/libxfs/xfs_fs.h
@@ -602,7 +602,8 @@ struct xfs_scrub_metadata {
 #define XFS_SCRUB_TYPE_SB	1	/* superblock */
 #define XFS_SCRUB_TYPE_AGF	2	/* AG free header */
 #define XFS_SCRUB_TYPE_AGFL	3	/* AG free list */
-#define XFS_SCRUB_TYPE_MAX	3
+#define XFS_SCRUB_TYPE_AGI	4	/* AG inode header */
+#define XFS_SCRUB_TYPE_MAX	4
 
 #define XFS_SCRUB_FLAG_REPAIR	0x1	/* i: repair this metadata */
 #define XFS_SCRUB_FLAG_CORRUPT	0x2	/* o: needs repair */
diff --git a/libxfs/xfs_ialloc.c b/libxfs/xfs_ialloc.c
index efb37d3..8f7fe60 100644
--- a/libxfs/xfs_ialloc.c
+++ b/libxfs/xfs_ialloc.c
@@ -2509,6 +2509,11 @@ xfs_agi_verify(
 
 	if (be32_to_cpu(agi->agi_level) > XFS_BTREE_MAXLEVELS)
 		return false;
+
+	if (xfs_sb_version_hasfinobt(&mp->m_sb) &&
+	    be32_to_cpu(agi->agi_free_level) > XFS_BTREE_MAXLEVELS)
+		return false;
+
 	/*
 	 * during growfs operations, the perag is not fully initialised,
 	 * so we can't use it for any useful checking. growfs ensures we can't

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