[XFS] implement generic xfs_btree_increment

From: Dave Chinner <dgc@sgi.com>

Because this is the first major generic btree routine this patch includes
some infrastrucure, first a few routines to deal with a btree block that
can be either in short or long form, second xfs_btree_read_buf_block,
which is the new central routine to read a btree block given a cursor, and
third the new xfs_btree_ptr_addr routine to calculate the address for a
given btree pointer record.

[hch: split out from bigger patch and minor adaptions]

SGI-PV: 985583

SGI-Modid: xfs-linux-melb:xfs-kern:32190a

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, 2 insertions, 2 deletions

diff --git a/fs/xfs/xfs_bmap.c b/fs/xfs/xfs_bmap.c
index a84d0c30b485..4b1ec44c80aa 100644
--- a/fs/xfs/xfs_bmap.c
+++ b/fs/xfs/xfs_bmap.c
@@ -1646,7 +1646,7 @@ xfs_bmap_add_extent_unwritten_real(
                                 PREV.br_blockcount - new->br_blockcount,
                                 oldext)))
                                 goto done;
-                        if ((error = xfs_bmbt_increment(cur, 0, &i)))
+                        if ((error = xfs_btree_increment(cur, 0, &i)))
                                 goto done;
                         if ((error = xfs_bmbt_update(cur, new->br_startoff,
                                 new->br_startblock,
@@ -3253,7 +3253,7 @@ xfs_bmap_del_extent(
                                                 got.br_startblock, temp,
                                                 got.br_state)))
                                         goto done;
-                                if ((error = xfs_bmbt_increment(cur, 0, &i)))
+                                if ((error = xfs_btree_increment(cur, 0, &i)))
                                         goto done;
                                 cur->bc_rec.b = new;
                                 error = xfs_bmbt_insert(cur, &i);