/* 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 */