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
 
 
 
 
 
 
33struct nilfs_btnode_chkey_ctxt {
34	__u64 oldkey;
35	__u64 newkey;
36	struct buffer_head *bh;
37	struct buffer_head *newbh;
38};
39
40void nilfs_btnode_cache_clear(struct address_space *);
41struct buffer_head *nilfs_btnode_create_block(struct address_space *btnc,
42					      __u64 blocknr);
43int nilfs_btnode_submit_block(struct address_space *, __u64, sector_t, int,
44			      struct buffer_head **, sector_t *);
45void nilfs_btnode_delete(struct buffer_head *);
46int nilfs_btnode_prepare_change_key(struct address_space *,
47				    struct nilfs_btnode_chkey_ctxt *);
48void nilfs_btnode_commit_change_key(struct address_space *,
49				    struct nilfs_btnode_chkey_ctxt *);
50void nilfs_btnode_abort_change_key(struct address_space *,
51				   struct nilfs_btnode_chkey_ctxt *);
52
53#endif	/* _NILFS_BTNODE_H */

 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 - change key context
34 * @oldkey: old key of block's moving content
35 * @newkey: new key for block's content
36 * @bh: buffer head of old buffer
37 * @newbh: buffer head of new buffer
38 */
39struct nilfs_btnode_chkey_ctxt {
40	__u64 oldkey;
41	__u64 newkey;
42	struct buffer_head *bh;
43	struct buffer_head *newbh;
44};
45
46void nilfs_btnode_cache_clear(struct address_space *);
47struct buffer_head *nilfs_btnode_create_block(struct address_space *btnc,
48					      __u64 blocknr);
49int nilfs_btnode_submit_block(struct address_space *, __u64, sector_t, int,
50			      struct buffer_head **, sector_t *);
51void nilfs_btnode_delete(struct buffer_head *);
52int nilfs_btnode_prepare_change_key(struct address_space *,
53				    struct nilfs_btnode_chkey_ctxt *);
54void nilfs_btnode_commit_change_key(struct address_space *,
55				    struct nilfs_btnode_chkey_ctxt *);
56void nilfs_btnode_abort_change_key(struct address_space *,
57				   struct nilfs_btnode_chkey_ctxt *);
58
59#endif	/* _NILFS_BTNODE_H */