[XFS] implement generic xfs_btree_lookup

[deliverable/linux.git] / fs / xfs / xfs_btree.h

diff --git a/fs/xfs/xfs_btree.h b/fs/xfs/xfs_btree.h
index 52b2da6ab32ebb3801d50b701767a79136c8bec7..c151175a5fd0e7cb4a97acaccdc09717616f91f4 100644 (file)
--- a/fs/xfs/xfs_btree.h
+++ b/fs/xfs/xfs_btree.h
@@ -190,6 +190,16 @@ struct xfs_btree_ops {
        /* records in block/level */
        int     (*get_maxrecs)(struct xfs_btree_cur *cur, int level);
 
+       /* init values of btree structures */
+       void    (*init_key_from_rec)(union xfs_btree_key *key,
+                                    union xfs_btree_rec *rec);
+       void    (*init_ptr_from_cur)(struct xfs_btree_cur *cur,
+                                    union xfs_btree_ptr *ptr);
+
+       /* difference between key value and cursor value */
+       __int64_t (*key_diff)(struct xfs_btree_cur *cur,
+                             union xfs_btree_key *key);
+
        /* btree tracing */
 #ifdef XFS_BTREE_TRACE
        void            (*trace_enter)(struct xfs_btree_cur *, const char *,
@@ -507,6 +517,7 @@ xfs_btree_setbuf(
  */
 int xfs_btree_increment(struct xfs_btree_cur *, int, int *);
 int xfs_btree_decrement(struct xfs_btree_cur *, int, int *);
+int xfs_btree_lookup(struct xfs_btree_cur *, xfs_lookup_t, int *);
 
 /*
  * Helpers.