[linux-2.6-block.git] / fs / nilfs2 / direct.h

/*
 * direct.h - NILFS direct block pointer.
 *
 * Copyright (C) 2006-2008 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 Koji Sato.
 */

#ifndef _NILFS_DIRECT_H
#define _NILFS_DIRECT_H

#include <linux/types.h>
#include <linux/buffer_head.h>
#include "bmap.h"


/**
 * struct nilfs_direct_node - direct node
 * @dn_flags: flags
 * @dn_pad: padding
 */
struct nilfs_direct_node {
	__u8 dn_flags;
	__u8 pad[7];
};

#define NILFS_DIRECT_NBLOCKS	(NILFS_BMAP_SIZE / sizeof(__le64) - 1)
#define NILFS_DIRECT_KEY_MIN	0
#define NILFS_DIRECT_KEY_MAX	(NILFS_DIRECT_NBLOCKS - 1)


int nilfs_direct_init(struct nilfs_bmap *);
int nilfs_direct_delete_and_convert(struct nilfs_bmap *, __u64, __u64 *,
				    __u64 *, int);


#endif	/* _NILFS_DIRECT_H */
Commit	Line	Data
36a580eb KS	1	/*
	2	* direct.h - NILFS direct block pointer.
	3	*
	4	* Copyright (C) 2006-2008 Nippon Telegraph and Telephone Corporation.
	5	*
	6	* This program is free software; you can redistribute it and/or modify
	7	* it under the terms of the GNU General Public License as published by
	8	* the Free Software Foundation; either version 2 of the License, or
	9	* (at your option) any later version.
	10	*
	11	* This program is distributed in the hope that it will be useful,
	12	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	13	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	14	* GNU General Public License for more details.
	15	*
4b420ab4	16	* Written by Koji Sato.
36a580eb KS	17	*/
	18
	19	#ifndef _NILFS_DIRECT_H
	20	#define _NILFS_DIRECT_H
	21
	22	#include <linux/types.h>
	23	#include <linux/buffer_head.h>
	24	#include "bmap.h"
	25
	26
36a580eb KS	27	/**
	28	* struct nilfs_direct_node - direct node
	29	* @dn_flags: flags
	30	* @dn_pad: padding
	31	*/
	32	struct nilfs_direct_node {
	33	__u8 dn_flags;
	34	__u8 pad[7];
	35	};
	36
36a580eb KS	37	#define NILFS_DIRECT_NBLOCKS (NILFS_BMAP_SIZE / sizeof(__le64) - 1)
	38	#define NILFS_DIRECT_KEY_MIN 0
	39	#define NILFS_DIRECT_KEY_MAX (NILFS_DIRECT_NBLOCKS - 1)
	40
	41
3033342a	42	int nilfs_direct_init(struct nilfs_bmap *);
36a580eb	43	int nilfs_direct_delete_and_convert(struct nilfs_bmap , __u64, __u64 ,
3033342a	44	__u64 *, int);
36a580eb KS	45
	46
	47	#endif /* _NILFS_DIRECT_H */