xfs: scrub inode block mappings

Scrub an individual inode's block mappings to make sure they make sense.
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Dave Chinner <dchinner@redhat.com>

fs/xfs/Makefile

@@ -145,6 +145,7 @@ xfs-y				+= $(addprefix scrub/, \
 				   trace.o \
 				   agheader.o \
 				   alloc.o \
+				   bmap.o \
 				   btree.o \
 				   common.o \
 				   ialloc.o \

fs/xfs/libxfs/xfs_fs.h

@@ -495,9 +495,12 @@ struct xfs_scrub_metadata {
 #define XFS_SCRUB_TYPE_RMAPBT	9	/* reverse mapping btree */
 #define XFS_SCRUB_TYPE_REFCNTBT	10	/* reference count btree */
 #define XFS_SCRUB_TYPE_INODE	11	/* inode record */
+#define XFS_SCRUB_TYPE_BMBTD	12	/* data fork block mapping */
+#define XFS_SCRUB_TYPE_BMBTA	13	/* attr fork block mapping */
+#define XFS_SCRUB_TYPE_BMBTC	14	/* CoW fork block mapping */
 
 /* Number of scrub subcommands. */
-#define XFS_SCRUB_TYPE_NR	12
+#define XFS_SCRUB_TYPE_NR	15
 
 /* i: Repair this metadata. */
 #define XFS_SCRUB_IFLAG_REPAIR		(1 << 0)

fs/xfs/scrub/common.h

@@ -89,7 +89,10 @@ int xfs_scrub_setup_ag_refcountbt(struct xfs_scrub_context *sc,
 				  struct xfs_inode *ip);
 int xfs_scrub_setup_inode(struct xfs_scrub_context *sc,
 			  struct xfs_inode *ip);
-
+int xfs_scrub_setup_inode_bmap(struct xfs_scrub_context *sc,
+			       struct xfs_inode *ip);
+int xfs_scrub_setup_inode_bmap_data(struct xfs_scrub_context *sc,
+				    struct xfs_inode *ip);
 
 void xfs_scrub_ag_free(struct xfs_scrub_context *sc, struct xfs_scrub_ag *sa);
 int xfs_scrub_ag_init(struct xfs_scrub_context *sc, xfs_agnumber_t agno,

fs/xfs/scrub/scrub.c

@@ -215,6 +215,18 @@ static const struct xfs_scrub_meta_ops meta_scrub_ops[] = {
 		.setup	= xfs_scrub_setup_inode,
 		.scrub	= xfs_scrub_inode,
 	},
+	{ /* inode data fork */
+		.setup	= xfs_scrub_setup_inode_bmap,
+		.scrub	= xfs_scrub_bmap_data,
+	},
+	{ /* inode attr fork */
+		.setup	= xfs_scrub_setup_inode_bmap,
+		.scrub	= xfs_scrub_bmap_attr,
+	},
+	{ /* inode CoW fork */
+		.setup	= xfs_scrub_setup_inode_bmap,
+		.scrub	= xfs_scrub_bmap_cow,
+	},
 };
 
 /* This isn't a stable feature, warn once per day. */

fs/xfs/scrub/scrub.h

@@ -79,5 +79,8 @@ int xfs_scrub_finobt(struct xfs_scrub_context *sc);
 int xfs_scrub_rmapbt(struct xfs_scrub_context *sc);
 int xfs_scrub_refcountbt(struct xfs_scrub_context *sc);
 int xfs_scrub_inode(struct xfs_scrub_context *sc);
+int xfs_scrub_bmap_data(struct xfs_scrub_context *sc);
+int xfs_scrub_bmap_attr(struct xfs_scrub_context *sc);
+int xfs_scrub_bmap_cow(struct xfs_scrub_context *sc);
 
 #endif	/* __XFS_SCRUB_SCRUB_H__ */