xfs: remove trivial bnobt/inobt scrub helpers

Christoph Hellwig complained about awkward code in the next two repair
patches such as:

	sc->sm->sm_type = XFS_SCRUB_TYPE_BNOBT;
	error = xchk_bnobt(sc);

This is a little silly, so let's export the xchk_{,i}allocbt functions
to the dispatch table in scrub.c directly and get rid of the helpers.
Originally I had planned each btree gets its own separate entry point,
but since repair doesn't work that way, it no longer makes sense to
complicate the call chain that way.

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

fs/xfs/scrub/alloc.c

@@ -138,31 +138,27 @@ xchk_allocbt_rec(
 	return 0;
 }
 
-/* Scrub the freespace btrees for some AG. */
-STATIC int
+/* Scrub one of the freespace btrees for some AG. */
+int
 xchk_allocbt(
-	struct xfs_scrub	*sc,
-	xfs_btnum_t		which)
+	struct xfs_scrub	*sc)
 {
 	struct xchk_alloc	ca = { };
 	struct xfs_btree_cur	*cur;
 
-	cur = which == XFS_BTNUM_BNO ? sc->sa.bno_cur : sc->sa.cnt_cur;
-	return xchk_btree(sc, cur, xchk_allocbt_rec, &XFS_RMAP_OINFO_AG, &ca);
-}
-
-int
-xchk_bnobt(
-	struct xfs_scrub	*sc)
-{
-	return xchk_allocbt(sc, XFS_BTNUM_BNO);
-}
+	switch (sc->sm->sm_type) {
+	case XFS_SCRUB_TYPE_BNOBT:
+		cur = sc->sa.bno_cur;
+		break;
+	case XFS_SCRUB_TYPE_CNTBT:
+		cur = sc->sa.cnt_cur;
+		break;
+	default:
+		ASSERT(0);
+		return -EIO;
+	}
 
-int
-xchk_cntbt(
-	struct xfs_scrub	*sc)
-{
-	return xchk_allocbt(sc, XFS_BTNUM_CNT);
+	return xchk_btree(sc, cur, xchk_allocbt_rec, &XFS_RMAP_OINFO_AG, &ca);
 }
 
 /* xref check that the extent is not free */

fs/xfs/scrub/ialloc.c

@@ -708,21 +708,34 @@ xchk_iallocbt_xref_rmap_inodes(
 		xchk_btree_xref_set_corrupt(sc, sc->sa.rmap_cur, 0);
 }
 
-/* Scrub the inode btrees for some AG. */
-STATIC int
+/* Scrub one of the inode btrees for some AG. */
+int
 xchk_iallocbt(
-	struct xfs_scrub	*sc,
-	xfs_btnum_t		which)
+	struct xfs_scrub	*sc)
 {
 	struct xfs_btree_cur	*cur;
 	struct xchk_iallocbt	iabt = {
 		.inodes		= 0,
 		.next_startino	= NULLAGINO,
 		.next_cluster_ino = NULLAGINO,
 	};
+	xfs_btnum_t		which;
 	int			error;
 
-	cur = which == XFS_BTNUM_INO ? sc->sa.ino_cur : sc->sa.fino_cur;
+	switch (sc->sm->sm_type) {
+	case XFS_SCRUB_TYPE_INOBT:
+		cur = sc->sa.ino_cur;
+		which = XFS_BTNUM_INO;
+		break;
+	case XFS_SCRUB_TYPE_FINOBT:
+		cur = sc->sa.fino_cur;
+		which = XFS_BTNUM_FINO;
+		break;
+	default:
+		ASSERT(0);
+		return -EIO;
+	}
+
 	error = xchk_btree(sc, cur, xchk_iallocbt_rec, &XFS_RMAP_OINFO_INOBT,
 			&iabt);
 	if (error)
@@ -743,20 +756,6 @@ xchk_iallocbt(
 	return error;
 }
 
-int
-xchk_inobt(
-	struct xfs_scrub	*sc)
-{
-	return xchk_iallocbt(sc, XFS_BTNUM_INO);
-}
-
-int
-xchk_finobt(
-	struct xfs_scrub	*sc)
-{
-	return xchk_iallocbt(sc, XFS_BTNUM_FINO);
-}
-
 /* See if an inode btree has (or doesn't have) an inode chunk record. */
 static inline void
 xchk_xref_inode_check(

fs/xfs/scrub/scrub.c

@@ -238,25 +238,25 @@ static const struct xchk_meta_ops meta_scrub_ops[] = {
 	[XFS_SCRUB_TYPE_BNOBT] = {	/* bnobt */
 		.type	= ST_PERAG,
 		.setup	= xchk_setup_ag_allocbt,
-		.scrub	= xchk_bnobt,
+		.scrub	= xchk_allocbt,
 		.repair	= xrep_notsupported,
 	},
 	[XFS_SCRUB_TYPE_CNTBT] = {	/* cntbt */
 		.type	= ST_PERAG,
 		.setup	= xchk_setup_ag_allocbt,
-		.scrub	= xchk_cntbt,
+		.scrub	= xchk_allocbt,
 		.repair	= xrep_notsupported,
 	},
 	[XFS_SCRUB_TYPE_INOBT] = {	/* inobt */
 		.type	= ST_PERAG,
 		.setup	= xchk_setup_ag_iallocbt,
-		.scrub	= xchk_inobt,
+		.scrub	= xchk_iallocbt,
 		.repair	= xrep_notsupported,
 	},
 	[XFS_SCRUB_TYPE_FINOBT] = {	/* finobt */
 		.type	= ST_PERAG,
 		.setup	= xchk_setup_ag_iallocbt,
-		.scrub	= xchk_finobt,
+		.scrub	= xchk_iallocbt,
 		.has	= xfs_has_finobt,
 		.repair	= xrep_notsupported,
 	},

fs/xfs/scrub/scrub.h

@@ -129,10 +129,8 @@ int xchk_superblock(struct xfs_scrub *sc);
 int xchk_agf(struct xfs_scrub *sc);
 int xchk_agfl(struct xfs_scrub *sc);
 int xchk_agi(struct xfs_scrub *sc);
-int xchk_bnobt(struct xfs_scrub *sc);
-int xchk_cntbt(struct xfs_scrub *sc);
-int xchk_inobt(struct xfs_scrub *sc);
-int xchk_finobt(struct xfs_scrub *sc);
+int xchk_allocbt(struct xfs_scrub *sc);
+int xchk_iallocbt(struct xfs_scrub *sc);
 int xchk_rmapbt(struct xfs_scrub *sc);
 int xchk_refcountbt(struct xfs_scrub *sc);
 int xchk_inode(struct xfs_scrub *sc);