1 /* SPDX-License-Identifier: GPL-2.0+ */
3 * btnode.h - 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_btnode_cache_clear(struct address_space
*);
34 struct buffer_head
*nilfs_btnode_create_block(struct address_space
*btnc
,
36 int nilfs_btnode_submit_block(struct address_space
*, __u64
, sector_t
, int,
37 int, struct buffer_head
**, sector_t
*);
38 void nilfs_btnode_delete(struct buffer_head
*);
39 int nilfs_btnode_prepare_change_key(struct address_space
*,
40 struct nilfs_btnode_chkey_ctxt
*);
41 void nilfs_btnode_commit_change_key(struct address_space
*,
42 struct nilfs_btnode_chkey_ctxt
*);
43 void nilfs_btnode_abort_change_key(struct address_space
*,
44 struct nilfs_btnode_chkey_ctxt
*);
46 #endif /* _NILFS_BTNODE_H */