2 * btnode.h - NILFS B-tree node cache
4 * Copyright (C) 2005-2008 Nippon Telegraph and Telephone Corporation.
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * Written by Seiji Kihara.
17 * Revised by Ryusuke Konishi.
20 #ifndef _NILFS_BTNODE_H
21 #define _NILFS_BTNODE_H
23 #include <linux/types.h>
24 #include <linux/buffer_head.h>
26 #include <linux/backing-dev.h>
29 * struct nilfs_btnode_chkey_ctxt - change key context
30 * @oldkey: old key of block's moving content
31 * @newkey: new key for block's content
32 * @bh: buffer head of old buffer
33 * @newbh: buffer head of new buffer
35 struct nilfs_btnode_chkey_ctxt
{
38 struct buffer_head
*bh
;
39 struct buffer_head
*newbh
;
42 void nilfs_btnode_cache_clear(struct address_space
*);
43 struct buffer_head
*nilfs_btnode_create_block(struct address_space
*btnc
,
45 int nilfs_btnode_submit_block(struct address_space
*, __u64
, sector_t
, int,
46 struct buffer_head
**, sector_t
*);
47 void nilfs_btnode_delete(struct buffer_head
*);
48 int nilfs_btnode_prepare_change_key(struct address_space
*,
49 struct nilfs_btnode_chkey_ctxt
*);
50 void nilfs_btnode_commit_change_key(struct address_space
*,
51 struct nilfs_btnode_chkey_ctxt
*);
52 void nilfs_btnode_abort_change_key(struct address_space
*,
53 struct nilfs_btnode_chkey_ctxt
*);
55 #endif /* _NILFS_BTNODE_H */
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