aboutsummaryrefslogtreecommitdiffstats
path: root/fs/nilfs2/btnode.h
blob: 0f88dbc9bcb3ef4536ff13a28321d432070a8413 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
/* SPDX-License-Identifier: GPL-2.0+ */
/*
 * btnode.h - NILFS B-tree node cache
 *
 * Copyright (C) 2005-2008 Nippon Telegraph and Telephone Corporation.
 *
 * Written by Seiji Kihara.
 * Revised by Ryusuke Konishi.
 */

#ifndef _NILFS_BTNODE_H
#define _NILFS_BTNODE_H

#include <linux/types.h>
#include <linux/buffer_head.h>
#include <linux/fs.h>
#include <linux/backing-dev.h>

/**
 * struct nilfs_btnode_chkey_ctxt - change key context
 * @oldkey: old key of block's moving content
 * @newkey: new key for block's content
 * @bh: buffer head of old buffer
 * @newbh: buffer head of new buffer
 */
struct nilfs_btnode_chkey_ctxt {
	__u64 oldkey;
	__u64 newkey;
	struct buffer_head *bh;
	struct buffer_head *newbh;
};

void nilfs_btnode_cache_clear(struct address_space *);
struct buffer_head *nilfs_btnode_create_block(struct address_space *btnc,
					      __u64 blocknr);
int nilfs_btnode_submit_block(struct address_space *, __u64, sector_t, int,
			      int, struct buffer_head **, sector_t *);
void nilfs_btnode_delete(struct buffer_head *);
int nilfs_btnode_prepare_change_key(struct address_space *,
				    struct nilfs_btnode_chkey_ctxt *);
void nilfs_btnode_commit_change_key(struct address_space *,
				    struct nilfs_btnode_chkey_ctxt *);
void nilfs_btnode_abort_change_key(struct address_space *,
				   struct nilfs_btnode_chkey_ctxt *);

#endif	/* _NILFS_BTNODE_H */