[linux.git] / fs / nilfs2 / btnode.h

/* SPDX-License-Identifier: GPL-2.0+ */
/*
 * 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_init_btnc_inode(struct inode *btnc_inode);
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,
			      blk_opf_t, 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 */
Commit	Line	Data
ae98043f	1	/* SPDX-License-Identifier: GPL-2.0+ */
a60be987	2	/*
94ee1d91	3	* NILFS B-tree node cache
a60be987 RK	4	*
	5	* Copyright (C) 2005-2008 Nippon Telegraph and Telephone Corporation.
	6	*
4b420ab4 RK	7	* Written by Seiji Kihara.
4b420ab4 RK	8	* Revised by Ryusuke Konishi.
a60be987 RK	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
f5974c8f VD	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	*/
a60be987 RK	26	struct nilfs_btnode_chkey_ctxt {
	27	__u64 oldkey;
	28	__u64 newkey;
	29	struct buffer_head *bh;
	30	struct buffer_head *newbh;
	31	};
	32
e897be17	33	void nilfs_init_btnc_inode(struct inode *btnc_inode);
a60be987	34	void nilfs_btnode_cache_clear(struct address_space *);
d501d736 RK	35	struct buffer_head nilfs_btnode_create_block(struct address_space btnc,
d501d736 RK	36	__u64 blocknr);
ed451259 BVA	37	int nilfs_btnode_submit_block(struct address_space *, __u64, sector_t,
ed451259 BVA	38	blk_opf_t, struct buffer_head *, sector_t );
a60be987 RK	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 *);
	46
a60be987	47	#endif /* _NILFS_BTNODE_H */