/*
 * 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.
 *
 * 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_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,
			      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 */
t/tree/include/net/phonet/pep.h?h=nds-private-remove&amp;id=e5ff7c4019c6cb6e86bc9d6d16e8a8f921133c70'>tree</a><a href='/cgit.cgi/linux/net-next.git/commit/include/net/phonet/pep.h?h=nds-private-remove&amp;id=e5ff7c4019c6cb6e86bc9d6d16e8a8f921133c70'>commit</a><a href='/cgit.cgi/linux/net-next.git/diff/include/net/phonet/pep.h?h=nds-private-remove&amp;id=e5ff7c4019c6cb6e86bc9d6d16e8a8f921133c70'>diff</a></td><td class='form'><form class='right' method='get' action='/cgit.cgi/linux/net-next.git/log/include/net/phonet/pep.h'>
<input type='hidden' name='h' value='nds-private-remove'/><input type='hidden' name='id' value='e5ff7c4019c6cb6e86bc9d6d16e8a8f921133c70'/><select name='qt'>
<option value='grep'>log msg</option>
<option value='author'>author</option>
<option value='committer'>committer</option>
<option value='range'>range</option>
</select>
<input class='txt' type='search' size='10' name='q' value=''/>
<input type='submit' value='search'/>
</form>
</td></tr></table>
<div class='path'>path: <a href='/cgit.cgi/linux/net-next.git/log/?h=nds-private-remove&amp;id=e5ff7c4019c6cb6e86bc9d6d16e8a8f921133c70'>root</a>/<a href='/cgit.cgi/linux/net-next.git/log/include?h=nds-private-remove&amp;id=e5ff7c4019c6cb6e86bc9d6d16e8a8f921133c70'>include</a>/<a href='/cgit.cgi/linux/net-next.git/log/include/net?h=nds-private-remove&amp;id=e5ff7c4019c6cb6e86bc9d6d16e8a8f921133c70'>net</a>/<a href='/cgit.cgi/linux/net-next.git/log/include/net/phonet?h=nds-private-remove&amp;id=e5ff7c4019c6cb6e86bc9d6d16e8a8f921133c70'>phonet</a>/<a href='/cgit.cgi/linux/net-next.git/log/include/net/phonet/pep.h?h=nds-private-remove&amp;id=e5ff7c4019c6cb6e86bc9d6d16e8a8f921133c70'>pep.h</a></div><div class='content'><table class='list nowrap'><tr class='nohover'><th class='left'>Age</th><th class='left'>Commit message (<a href='/cgit.cgi/linux/net-next.git/log/include/net/phonet/pep.h?h=nds-private-remove&amp;id=e5ff7c4019c6cb6e86bc9d6d16e8a8f921133c70&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th><th class='left'>Files</th><th class='left'>Lines</th></tr>