1 /* SPDX-License-Identifier: GPL-2.0+ */
3 * NILFS B-tree node cache
5 * Copyright (C) 2005-2008 Nippon Telegraph and Telephone Corporation.
7 * Written by Seiji Kihara.
8 * Revised by Ryusuke Konishi.
11 #ifndef _NILFS_BTNODE_H
12 #define _NILFS_BTNODE_H
14 #include <linux/types.h>
15 #include <linux/buffer_head.h>
17 #include <linux/backing-dev.h>
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
26 struct nilfs_btnode_chkey_ctxt {
29 struct buffer_head *bh;
30 struct buffer_head *newbh;
33 void nilfs_init_btnc_inode(struct inode *btnc_inode);
34 void nilfs_btnode_cache_clear(struct address_space *);
35 struct buffer_head *nilfs_btnode_create_block(struct address_space *btnc,
37 int nilfs_btnode_submit_block(struct address_space *, __u64, sector_t, int,
38 int, struct buffer_head **, sector_t *);
39 void nilfs_btnode_delete(struct buffer_head *);
40 int nilfs_btnode_prepare_change_key(struct address_space *,
41 struct nilfs_btnode_chkey_ctxt *);
42 void nilfs_btnode_commit_change_key(struct address_space *,
43 struct nilfs_btnode_chkey_ctxt *);
44 void nilfs_btnode_abort_change_key(struct address_space *,
45 struct nilfs_btnode_chkey_ctxt *);
47 #endif /* _NILFS_BTNODE_H */