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1/* SPDX-License-Identifier: GPL-2.0+ */2/*3 * NILFS B-tree node cache4 *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_H12#define _NILFS_BTNODE_H13 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 context21 * @oldkey: old key of block's moving content22 * @newkey: new key for block's content23 * @bh: buffer head of old buffer24 * @newbh: buffer head of new buffer25 */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