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_init_btnc_inode(struct inode *btnc_inode);
43 void nilfs_btnode_cache_clear(struct address_space *);
44 struct buffer_head *nilfs_btnode_create_block(struct address_space *btnc,
46 int nilfs_btnode_submit_block(struct address_space *, __u64, sector_t, int,
47 int, struct buffer_head **, sector_t *);
48 void nilfs_btnode_delete(struct buffer_head *);
49 int nilfs_btnode_prepare_change_key(struct address_space *,
50 struct nilfs_btnode_chkey_ctxt *);
51 void nilfs_btnode_commit_change_key(struct address_space *,
52 struct nilfs_btnode_chkey_ctxt *);
53 void nilfs_btnode_abort_change_key(struct address_space *,
54 struct nilfs_btnode_chkey_ctxt *);
56 #endif /* _NILFS_BTNODE_H */