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[XFS] implement generic xfs_btree_lookup

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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>
This commit is contained in:
Christoph Hellwig
2008-10-30 16:56:09 +11:00
committed by Lachlan McIlroy
parent 8df4da4a0a
commit fe033cc848
12 changed files with 487 additions and 735 deletions
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11
fs/xfs/xfs_btree.h
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@@ -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.