1/* SPDX-License-Identifier: GPL-2.0+ */
2/*
3 * NILFS B-tree node cache
4 *
5 * Copyright (C) 2005-2008 Nippon Telegraph and Telephone Corporation.
6 *
7 * Written by Seiji Kihara.
8 * Revised by Ryusuke Konishi.
9 */
10
11#ifndef _NILFS_BTNODE_H
12#define _NILFS_BTNODE_H
13
14#include <linux/types.h>
15#include <linux/buffer_head.h>
16#include <linux/fs.h>
17#include <linux/backing-dev.h>
18
19/**
20 * struct nilfs_btnode_chkey_ctxt - change key context
21 * @oldkey: old key of block's moving content
22 * @newkey: new key for block's content
23 * @bh: buffer head of old buffer
24 * @newbh: buffer head of new buffer
25 */
26struct nilfs_btnode_chkey_ctxt {
27 __u64 oldkey;
28 __u64 newkey;
29 struct buffer_head *bh;
30 struct buffer_head *newbh;
31};
32
33void nilfs_init_btnc_inode(struct inode *btnc_inode);
34void nilfs_btnode_cache_clear(struct address_space *);
35struct buffer_head *nilfs_btnode_create_block(struct address_space *btnc,
36 __u64 blocknr);
37int nilfs_btnode_submit_block(struct address_space *, __u64, sector_t,
38 blk_opf_t, struct buffer_head **, sector_t *);
39void nilfs_btnode_delete(struct buffer_head *);
40int nilfs_btnode_prepare_change_key(struct address_space *,
41 struct nilfs_btnode_chkey_ctxt *);
42void nilfs_btnode_commit_change_key(struct address_space *,
43 struct nilfs_btnode_chkey_ctxt *);
44void nilfs_btnode_abort_change_key(struct address_space *,
45 struct nilfs_btnode_chkey_ctxt *);
46
47#endif /* _NILFS_BTNODE_H */
48

source code of linux/fs/nilfs2/btnode.h