[XFS] implement generic xfs_btree_lookup

From: Dave Chinner <dgc@sgi.com>

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

SGI-PV: 985583

SGI-Modid: xfs-linux-melb:xfs-kern:32192a

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, 29 insertions, 0 deletions

diff --git a/fs/xfs/xfs_bmap.c b/fs/xfs/xfs_bmap.c
index bdbab54948fc..1296b4102e97 100644
--- a/fs/xfs/xfs_bmap.c
+++ b/fs/xfs/xfs_bmap.c
@@ -402,6 +402,35 @@ xfs_bmap_disk_count_leaves(
  * Bmap internal routines.
  */
 
+STATIC int                              /* error */
+xfs_bmbt_lookup_eq(
+        struct xfs_btree_cur    *cur,
+        xfs_fileoff_t           off,
+        xfs_fsblock_t           bno,
+        xfs_filblks_t           len,
+        int                     *stat)  /* success/failure */
+{
+        cur->bc_rec.b.br_startoff = off;
+        cur->bc_rec.b.br_startblock = bno;
+        cur->bc_rec.b.br_blockcount = len;
+        return xfs_btree_lookup(cur, XFS_LOOKUP_EQ, stat);
+}
+
+STATIC int                              /* error */
+xfs_bmbt_lookup_ge(
+        struct xfs_btree_cur    *cur,
+        xfs_fileoff_t           off,
+        xfs_fsblock_t           bno,
+        xfs_filblks_t           len,
+        int                     *stat)  /* success/failure */
+{
+        cur->bc_rec.b.br_startoff = off;
+        cur->bc_rec.b.br_startblock = bno;
+        cur->bc_rec.b.br_blockcount = len;
+        return xfs_btree_lookup(cur, XFS_LOOKUP_GE, stat);
+}
+
+
 /*
  * Called from xfs_bmap_add_attrfork to handle btree format files.
  */