[XFS] add keys_inorder and recs_inorder btree methods

Add methods to check whether two keys/records are in the righ order. This
replaces the xfs_btree_check_key and xfs_btree_check_rec methods. For the
callers from xfs_bmap.c just opencode the bmbt-specific asserts.

SGI-PV: 985583

SGI-Modid: xfs-linux-melb:xfs-kern:32208a

Signed-off-by: Christoph Hellwig <hch@infradead.org>
Signed-off-by: Lachlan McIlroy <lachlan@sgi.com>
Signed-off-by: Bill O'Donnell <billodo@sgi.com>
Signed-off-by: David Chinner <david@fromorbit.com>

6 files changed, 135 insertions, 161 deletions

diff --git a/fs/xfs/xfs_alloc_btree.c b/fs/xfs/xfs_alloc_btree.c
index 4d44f03858b0..9e63f8c180d9 100644
--- a/fs/xfs/xfs_alloc_btree.c
+++ b/fs/xfs/xfs_alloc_btree.c
@@ -311,6 +311,45 @@ xfs_allocbt_kill_root(
 	return 0;
 }
 
+#ifdef DEBUG
+STATIC int
+xfs_allocbt_keys_inorder(
+	struct xfs_btree_cur	*cur,
+	union xfs_btree_key	*k1,
+	union xfs_btree_key	*k2)
+{
+	if (cur->bc_btnum == XFS_BTNUM_BNO) {
+		return be32_to_cpu(k1->alloc.ar_startblock) <
+		       be32_to_cpu(k2->alloc.ar_startblock);
+	} else {
+		return be32_to_cpu(k1->alloc.ar_blockcount) <
+			be32_to_cpu(k2->alloc.ar_blockcount) ||
+			(k1->alloc.ar_blockcount == k2->alloc.ar_blockcount &&
+			 be32_to_cpu(k1->alloc.ar_startblock) <
+			 be32_to_cpu(k2->alloc.ar_startblock));
+	}
+}
+
+STATIC int
+xfs_allocbt_recs_inorder(
+	struct xfs_btree_cur	*cur,
+	union xfs_btree_rec	*r1,
+	union xfs_btree_rec	*r2)
+{
+	if (cur->bc_btnum == XFS_BTNUM_BNO) {
+		return be32_to_cpu(r1->alloc.ar_startblock) +
+			be32_to_cpu(r1->alloc.ar_blockcount) <=
+			be32_to_cpu(r2->alloc.ar_startblock);
+	} else {
+		return be32_to_cpu(r1->alloc.ar_blockcount) <
+			be32_to_cpu(r2->alloc.ar_blockcount) ||
+			(r1->alloc.ar_blockcount == r2->alloc.ar_blockcount &&
+			 be32_to_cpu(r1->alloc.ar_startblock) <
+			 be32_to_cpu(r2->alloc.ar_startblock));
+	}
+}
+#endif	/* DEBUG */
+
 #ifdef XFS_BTREE_TRACE
 ktrace_t	*xfs_allocbt_trace_buf;
 
@@ -395,6 +434,11 @@ static const struct xfs_btree_ops xfs_allocbt_ops = {
 	.init_ptr_from_cur	= xfs_allocbt_init_ptr_from_cur,
 	.key_diff		= xfs_allocbt_key_diff,
 
+#ifdef DEBUG
+	.keys_inorder		= xfs_allocbt_keys_inorder,
+	.recs_inorder		= xfs_allocbt_recs_inorder,
+#endif
+
 #ifdef XFS_BTREE_TRACE
 	.trace_enter		= xfs_allocbt_trace_enter,
 	.trace_cursor		= xfs_allocbt_trace_cursor,
diff --git a/fs/xfs/xfs_bmap.c b/fs/xfs/xfs_bmap.c
index 5cceb8d3c162..b7f99d7576d0 100644
--- a/fs/xfs/xfs_bmap.c
+++ b/fs/xfs/xfs_bmap.c
@@ -6195,7 +6195,8 @@ xfs_check_block(
 		}
 
 		if (prevp) {
-			xfs_btree_check_key(XFS_BTNUM_BMAP, prevp, keyp);
+			ASSERT(be64_to_cpu(prevp->br_startoff) <
+			       be64_to_cpu(keyp->br_startoff));
 		}
 		prevp = keyp;
 
@@ -6338,11 +6339,15 @@ xfs_bmap_check_leaf_extents(
 
 		ep = XFS_BTREE_REC_ADDR(xfs_bmbt, block, 1);
 		if (i) {
-			xfs_btree_check_rec(XFS_BTNUM_BMAP, &last, ep);
+			ASSERT(xfs_bmbt_disk_get_startoff(&last) +
+			       xfs_bmbt_disk_get_blockcount(&last) <=
+			       xfs_bmbt_disk_get_startoff(ep));
 		}
 		for (j = 1; j < num_recs; j++) {
 			nextp = XFS_BTREE_REC_ADDR(xfs_bmbt, block, j + 1);
-			xfs_btree_check_rec(XFS_BTNUM_BMAP, ep, nextp);
+			ASSERT(xfs_bmbt_disk_get_startoff(ep) +
+			       xfs_bmbt_disk_get_blockcount(ep) <=
+			       xfs_bmbt_disk_get_startoff(nextp));
 			ep = nextp;
 		}
 
diff --git a/fs/xfs/xfs_bmap_btree.c b/fs/xfs/xfs_bmap_btree.c
index 7a02d391afec..c5eeb3241e25 100644
--- a/fs/xfs/xfs_bmap_btree.c
+++ b/fs/xfs/xfs_bmap_btree.c
@@ -699,6 +699,29 @@ xfs_bmbt_key_diff(
 				      cur->bc_rec.b.br_startoff;
 }
 
+#ifdef DEBUG
+STATIC int
+xfs_bmbt_keys_inorder(
+	struct xfs_btree_cur	*cur,
+	union xfs_btree_key	*k1,
+	union xfs_btree_key	*k2)
+{
+	return be64_to_cpu(k1->bmbt.br_startoff) <
+		be64_to_cpu(k2->bmbt.br_startoff);
+}
+
+STATIC int
+xfs_bmbt_recs_inorder(
+	struct xfs_btree_cur	*cur,
+	union xfs_btree_rec	*r1,
+	union xfs_btree_rec	*r2)
+{
+	return xfs_bmbt_disk_get_startoff(&r1->bmbt) +
+		xfs_bmbt_disk_get_blockcount(&r1->bmbt) <=
+		xfs_bmbt_disk_get_startoff(&r2->bmbt);
+}
+#endif	/* DEBUG */
+
 #ifdef XFS_BTREE_TRACE
 ktrace_t	*xfs_bmbt_trace_buf;
 
@@ -801,6 +824,11 @@ static const struct xfs_btree_ops xfs_bmbt_ops = {
 	.init_ptr_from_cur	= xfs_bmbt_init_ptr_from_cur,
 	.key_diff		= xfs_bmbt_key_diff,
 
+#ifdef DEBUG
+	.keys_inorder		= xfs_bmbt_keys_inorder,
+	.recs_inorder		= xfs_bmbt_recs_inorder,
+#endif
+
 #ifdef XFS_BTREE_TRACE
 	.trace_enter		= xfs_bmbt_trace_enter,
 	.trace_cursor		= xfs_bmbt_trace_cursor,
diff --git a/fs/xfs/xfs_btree.c b/fs/xfs/xfs_btree.c
index 88eb00bdeb96..d667d30210a8 100644
--- a/fs/xfs/xfs_btree.c
+++ b/fs/xfs/xfs_btree.c
@@ -52,122 +52,6 @@ const __uint32_t xfs_magics[XFS_BTNUM_MAX] = {
 	XFS_ABTB_MAGIC, XFS_ABTC_MAGIC, XFS_BMAP_MAGIC, XFS_IBT_MAGIC
 };
 
-/*
- * External routines.
- */
-
-#ifdef DEBUG
-/*
- * Debug routine: check that keys are in the right order.
- */
-void
-xfs_btree_check_key(
-	xfs_btnum_t	btnum,		/* btree identifier */
-	void		*ak1,		/* pointer to left (lower) key */
-	void		*ak2)		/* pointer to right (higher) key */
-{
-	switch (btnum) {
-	case XFS_BTNUM_BNO: {
-		xfs_alloc_key_t	*k1;
-		xfs_alloc_key_t	*k2;
-
-		k1 = ak1;
-		k2 = ak2;
-		ASSERT(be32_to_cpu(k1->ar_startblock) < be32_to_cpu(k2->ar_startblock));
-		break;
-	    }
-	case XFS_BTNUM_CNT: {
-		xfs_alloc_key_t	*k1;
-		xfs_alloc_key_t	*k2;
-
-		k1 = ak1;
-		k2 = ak2;
-		ASSERT(be32_to_cpu(k1->ar_blockcount) < be32_to_cpu(k2->ar_blockcount) ||
-		       (k1->ar_blockcount == k2->ar_blockcount &&
-			be32_to_cpu(k1->ar_startblock) < be32_to_cpu(k2->ar_startblock)));
-		break;
-	    }
-	case XFS_BTNUM_BMAP: {
-		xfs_bmbt_key_t	*k1;
-		xfs_bmbt_key_t	*k2;
-
-		k1 = ak1;
-		k2 = ak2;
-		ASSERT(be64_to_cpu(k1->br_startoff) < be64_to_cpu(k2->br_startoff));
-		break;
-	    }
-	case XFS_BTNUM_INO: {
-		xfs_inobt_key_t	*k1;
-		xfs_inobt_key_t	*k2;
-
-		k1 = ak1;
-		k2 = ak2;
-		ASSERT(be32_to_cpu(k1->ir_startino) < be32_to_cpu(k2->ir_startino));
-		break;
-	    }
-	default:
-		ASSERT(0);
-	}
-}
-
-/*
- * Debug routine: check that records are in the right order.
- */
-void
-xfs_btree_check_rec(
-	xfs_btnum_t	btnum,		/* btree identifier */
-	void		*ar1,		/* pointer to left (lower) record */
-	void		*ar2)		/* pointer to right (higher) record */
-{
-	switch (btnum) {
-	case XFS_BTNUM_BNO: {
-		xfs_alloc_rec_t	*r1;
-		xfs_alloc_rec_t	*r2;
-
-		r1 = ar1;
-		r2 = ar2;
-		ASSERT(be32_to_cpu(r1->ar_startblock) +
-		       be32_to_cpu(r1->ar_blockcount) <=
-		       be32_to_cpu(r2->ar_startblock));
-		break;
-	    }
-	case XFS_BTNUM_CNT: {
-		xfs_alloc_rec_t	*r1;
-		xfs_alloc_rec_t	*r2;
-
-		r1 = ar1;
-		r2 = ar2;
-		ASSERT(be32_to_cpu(r1->ar_blockcount) < be32_to_cpu(r2->ar_blockcount) ||
-		       (r1->ar_blockcount == r2->ar_blockcount &&
-			be32_to_cpu(r1->ar_startblock) < be32_to_cpu(r2->ar_startblock)));
-		break;
-	    }
-	case XFS_BTNUM_BMAP: {
-		xfs_bmbt_rec_t	*r1;
-		xfs_bmbt_rec_t	*r2;
-
-		r1 = ar1;
-		r2 = ar2;
-		ASSERT(xfs_bmbt_disk_get_startoff(r1) +
-		       xfs_bmbt_disk_get_blockcount(r1) <=
-		       xfs_bmbt_disk_get_startoff(r2));
-		break;
-	    }
-	case XFS_BTNUM_INO: {
-		xfs_inobt_rec_t	*r1;
-		xfs_inobt_rec_t	*r2;
-
-		r1 = ar1;
-		r2 = ar2;
-		ASSERT(be32_to_cpu(r1->ir_startino) + XFS_INODES_PER_CHUNK <=
-		       be32_to_cpu(r2->ir_startino));
-		break;
-	    }
-	default:
-		ASSERT(0);
-	}
-}
-#endif	/* DEBUG */
 
 int					/* error (0 or EFSCORRUPTED) */
 xfs_btree_check_lblock(
@@ -2032,9 +1916,8 @@ xfs_btree_lshift(
 		xfs_btree_log_keys(cur, lbp, lrecs, lrecs);
 		xfs_btree_log_ptrs(cur, lbp, lrecs, lrecs);
 
-		xfs_btree_check_key(cur->bc_btnum,
-				    xfs_btree_key_addr(cur, lrecs - 1, left),
-				    lkp);
+		ASSERT(cur->bc_ops->keys_inorder(cur,
+			xfs_btree_key_addr(cur, lrecs - 1, left), lkp));
 	} else {
 		/* It's a leaf.  Move records.  */
 		union xfs_btree_rec	*lrp;	/* left record pointer */
@@ -2045,9 +1928,8 @@ xfs_btree_lshift(
 		xfs_btree_copy_recs(cur, lrp, rrp, 1);
 		xfs_btree_log_recs(cur, lbp, lrecs, lrecs);
 
-		xfs_btree_check_rec(cur->bc_btnum,
-				    xfs_btree_rec_addr(cur, lrecs - 1, left),
-				    lrp);
+		ASSERT(cur->bc_ops->recs_inorder(cur,
+			xfs_btree_rec_addr(cur, lrecs - 1, left), lrp));
 	}
 
 	xfs_btree_set_numrecs(left, lrecs);
@@ -2222,8 +2104,8 @@ xfs_btree_rshift(
 		xfs_btree_log_keys(cur, rbp, 1, rrecs + 1);
 		xfs_btree_log_ptrs(cur, rbp, 1, rrecs + 1);
 
-		xfs_btree_check_key(cur->bc_btnum, rkp,
-				    xfs_btree_key_addr(cur, 2, right));
+		ASSERT(cur->bc_ops->keys_inorder(cur, rkp,
+			xfs_btree_key_addr(cur, 2, right)));
 	} else {
 		/* It's a leaf. make a hole in the records */
 		union xfs_btree_rec	*lrp;
@@ -2241,8 +2123,8 @@ xfs_btree_rshift(
 		cur->bc_ops->init_key_from_rec(&key, rrp);
 		rkp = &key;
 
-		xfs_btree_check_rec(cur->bc_btnum, rrp,
-				    xfs_btree_rec_addr(cur, 2, right));
+		ASSERT(cur->bc_ops->recs_inorder(cur, rrp,
+			xfs_btree_rec_addr(cur, 2, right)));
 	}
 
 	/*
@@ -2849,11 +2731,11 @@ xfs_btree_insrec(
 	/* Check that the new entry is being inserted in the right place. */
 	if (ptr <= numrecs) {
 		if (level == 0) {
-			xfs_btree_check_rec(cur->bc_btnum, recp,
-					xfs_btree_rec_addr(cur, ptr, block));
+			ASSERT(cur->bc_ops->recs_inorder(cur, recp,
+				xfs_btree_rec_addr(cur, ptr, block)));
 		} else {
-			xfs_btree_check_key(cur->bc_btnum, &key,
-					xfs_btree_key_addr(cur, ptr, block));
+			ASSERT(cur->bc_ops->keys_inorder(cur, &key,
+				xfs_btree_key_addr(cur, ptr, block)));
 		}
 	}
 #endif
@@ -2923,8 +2805,8 @@ xfs_btree_insrec(
 		xfs_btree_log_keys(cur, bp, ptr, numrecs);
 #ifdef DEBUG
 		if (ptr < numrecs) {
-			xfs_btree_check_key(cur->bc_btnum, kp,
-				xfs_btree_key_addr(cur, ptr + 1, block));
+			ASSERT(cur->bc_ops->keys_inorder(cur, kp,
+				xfs_btree_key_addr(cur, ptr + 1, block)));
 		}
 #endif
 	} else {
@@ -2941,8 +2823,8 @@ xfs_btree_insrec(
 		xfs_btree_log_recs(cur, bp, ptr, numrecs);
 #ifdef DEBUG
 		if (ptr < numrecs) {
-			xfs_btree_check_rec(cur->bc_btnum, rp,
-				xfs_btree_rec_addr(cur, ptr + 1, block));
+			ASSERT(cur->bc_ops->recs_inorder(cur, rp,
+				xfs_btree_rec_addr(cur, ptr + 1, block)));
 		}
 #endif
 	}
diff --git a/fs/xfs/xfs_btree.h b/fs/xfs/xfs_btree.h
index d6cc71e31de5..25a488d4da18 100644
--- a/fs/xfs/xfs_btree.h
+++ b/fs/xfs/xfs_btree.h
@@ -229,6 +229,18 @@ struct xfs_btree_ops {
 	__int64_t (*key_diff)(struct xfs_btree_cur *cur,
 			      union xfs_btree_key *key);
 
+#ifdef DEBUG
+	/* check that k1 is lower than k2 */
+	int	(*keys_inorder)(struct xfs_btree_cur *cur,
+				union xfs_btree_key *k1,
+				union xfs_btree_key *k2);
+
+	/* check that r1 is lower than r2 */
+	int	(*recs_inorder)(struct xfs_btree_cur *cur,
+				union xfs_btree_rec *r1,
+				union xfs_btree_rec *r2);
+#endif
+
 	/* btree tracing */
 #ifdef XFS_BTREE_TRACE
 	void		(*trace_enter)(struct xfs_btree_cur *, const char *,
@@ -379,30 +391,6 @@ xfs_btree_check_ptr(
 	int			index,	/* offset from ptr to check */
 	int			level);	/* btree block level */
 
-#ifdef DEBUG
-
-/*
- * Debug routine: check that keys are in the right order.
- */
-void
-xfs_btree_check_key(
-	xfs_btnum_t		btnum,	/* btree identifier */
-	void			*ak1,	/* pointer to left (lower) key */
-	void			*ak2);	/* pointer to right (higher) key */
-
-/*
- * Debug routine: check that records are in the right order.
- */
-void
-xfs_btree_check_rec(
-	xfs_btnum_t		btnum,	/* btree identifier */
-	void			*ar1,	/* pointer to left (lower) record */
-	void			*ar2);	/* pointer to right (higher) record */
-#else
-#define	xfs_btree_check_key(a, b, c)
-#define	xfs_btree_check_rec(a, b, c)
-#endif	/* DEBUG */
-
 /*
  * Delete the btree cursor.
  */
diff --git a/fs/xfs/xfs_ialloc_btree.c b/fs/xfs/xfs_ialloc_btree.c
index 9f4e33c945c2..dcd4a956e73c 100644
--- a/fs/xfs/xfs_ialloc_btree.c
+++ b/fs/xfs/xfs_ialloc_btree.c
@@ -219,6 +219,28 @@ xfs_inobt_kill_root(
 	return 0;
 }
 
+#ifdef DEBUG
+STATIC int
+xfs_inobt_keys_inorder(
+	struct xfs_btree_cur	*cur,
+	union xfs_btree_key	*k1,
+	union xfs_btree_key	*k2)
+{
+	return be32_to_cpu(k1->inobt.ir_startino) <
+		be32_to_cpu(k2->inobt.ir_startino);
+}
+
+STATIC int
+xfs_inobt_recs_inorder(
+	struct xfs_btree_cur	*cur,
+	union xfs_btree_rec	*r1,
+	union xfs_btree_rec	*r2)
+{
+	return be32_to_cpu(r1->inobt.ir_startino) + XFS_INODES_PER_CHUNK <=
+		be32_to_cpu(r2->inobt.ir_startino);
+}
+#endif	/* DEBUG */
+
 #ifdef XFS_BTREE_TRACE
 ktrace_t	*xfs_inobt_trace_buf;
 
@@ -302,6 +324,11 @@ static const struct xfs_btree_ops xfs_inobt_ops = {
 	.init_ptr_from_cur	= xfs_inobt_init_ptr_from_cur,
 	.key_diff		= xfs_inobt_key_diff,
 
+#ifdef DEBUG
+	.keys_inorder		= xfs_inobt_keys_inorder,
+	.recs_inorder		= xfs_inobt_recs_inorder,
+#endif
+
 #ifdef XFS_BTREE_TRACE
 	.trace_enter		= xfs_inobt_trace_enter,
 	.trace_cursor		= xfs_inobt_trace_cursor,