1 /*
2 * btnode.h - NILFS B-tree node cache
3 *
4 * Copyright (C) 2005-2008 Nippon Telegraph and Telephone Corporation.
5 *
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.
10 *
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.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
19 *
20 * Written by Seiji Kihara <kihara@osrg.net>
21 * Revised by Ryusuke Konishi <ryusuke@osrg.net>
22 */
23
24 #ifndef _NILFS_BTNODE_H
25 #define _NILFS_BTNODE_H
26
27 #include <linux/types.h>
28 #include <linux/buffer_head.h>
29 #include <linux/fs.h>
30 #include <linux/backing-dev.h>
31
32
33 struct nilfs_btnode_chkey_ctxt {
34 __u64 oldkey;
35 __u64 newkey;
36 struct buffer_head *bh;
37 struct buffer_head *newbh;
38 };
39
40 void nilfs_btnode_cache_init_once(struct address_space *);
41 void nilfs_btnode_cache_init(struct address_space *, struct backing_dev_info *);
42 void nilfs_btnode_cache_clear(struct address_space *);
43 int nilfs_btnode_submit_block(struct address_space *, __u64, sector_t,
44 struct buffer_head **, int);
45 int nilfs_btnode_get(struct address_space *, __u64, sector_t,
46 struct buffer_head **, int);
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 *);
54
55 #define nilfs_btnode_mark_dirty(bh) nilfs_mark_buffer_dirty(bh)
56
57
58 #endif /* _NILFS_BTNODE_H */
59
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