/*	$NetBSD: v7fs_datablock.h,v 1.2 2011/07/16 12:35:32 uch Exp $	*/

/*-
 * Copyright (c) 2011 The NetBSD Foundation, Inc.
 * All rights reserved.
 *
 * This code is derived from software contributed to The NetBSD Foundation
 * by UCHIYAMA Yasushi.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */

#ifndef _V7FS_DATABLOCK_H_
#define	_V7FS_DATABLOCK_H_

__BEGIN_DECLS
bool datablock_number_sanity(const struct v7fs_self *, v7fs_daddr_t);
int v7fs_datablock_allocate(struct v7fs_self *, v7fs_daddr_t *);
int v7fs_datablock_foreach(struct v7fs_self *, struct v7fs_inode *,
    int (*)(struct v7fs_self *, void *, v7fs_daddr_t, size_t), void *);
v7fs_daddr_t v7fs_datablock_last(struct v7fs_self *, struct v7fs_inode *,
    v7fs_off_t);
int v7fs_datablock_expand(struct v7fs_self *, struct v7fs_inode *, size_t);
int v7fs_datablock_contract(struct v7fs_self *, struct v7fs_inode *, size_t);
int v7fs_datablock_size_change(struct v7fs_self *, size_t, struct v7fs_inode *);

struct v7fs_daddr_map {
	int level; /* direct, index1, index2, index3 */
	v7fs_daddr_t index[3];
};
int v7fs_datablock_addr(size_t, struct v7fs_daddr_map *);
__END_DECLS
#endif /*!_V7FS_INODE_H_ */