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authorChristoph Hellwig <hch@infradead.org>2008-10-30 16:55:45 +1100
committerLachlan McIlroy <lachlan@sgi.com>2008-10-30 16:55:45 +1100
commit637aa50f461b8ea6b1e8bf9877b0d13d00085043 (patch)
treea7c00b821dca04fe90614461749b74eff40bd8ed /fs/xfs/xfs_btree.h
parent65f1eaeac0efc968797f3ac955b85ba3f5d4f9c8 (diff)
downloadop-kernel-dev-637aa50f461b8ea6b1e8bf9877b0d13d00085043.zip
op-kernel-dev-637aa50f461b8ea6b1e8bf9877b0d13d00085043.tar.gz
[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>
Diffstat (limited to 'fs/xfs/xfs_btree.h')
-rw-r--r--fs/xfs/xfs_btree.h10
1 files changed, 10 insertions, 0 deletions
diff --git a/fs/xfs/xfs_btree.h b/fs/xfs/xfs_btree.h
index 593f82b..f5a4b8e 100644
--- a/fs/xfs/xfs_btree.h
+++ b/fs/xfs/xfs_btree.h
@@ -503,8 +503,18 @@ xfs_btree_setbuf(
/*
+ * Common btree core entry points.
+ */
+int xfs_btree_increment(struct xfs_btree_cur *, int, int *);
+
+/*
* Helpers.
*/
+static inline int xfs_btree_get_numrecs(struct xfs_btree_block *block)
+{
+ return be16_to_cpu(block->bb_numrecs);
+}
+
static inline int xfs_btree_get_level(struct xfs_btree_block *block)
{
return be16_to_cpu(block->bb_level);
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