/* * btnode.h - NILFS B-tree node cache * * Copyright (C) 2005-2008 Nippon Telegraph and Telephone Corporation. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA * * Written by Seiji Kihara <kihara@osrg.net> * Revised by Ryusuke Konishi <ryusuke@osrg.net> */ #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_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, int,			      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 */