[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>

1 files changed, 44 insertions, 0 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,