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direct.h
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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  *
16  * You should have received a copy of the GNU General Public License
17  * along with this program; if not, write to the Free Software
18  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
19  *
20  * Written by Koji Sato <[email protected]>.
21  */
22 
23 #ifndef _NILFS_DIRECT_H
24 #define _NILFS_DIRECT_H
25 
26 #include <linux/types.h>
27 #include <linux/buffer_head.h>
28 #include "bmap.h"
29 
30 
38  __u8 pad[7];
39 };
40 
41 #define NILFS_DIRECT_NBLOCKS (NILFS_BMAP_SIZE / sizeof(__le64) - 1)
42 #define NILFS_DIRECT_KEY_MIN 0
43 #define NILFS_DIRECT_KEY_MAX (NILFS_DIRECT_NBLOCKS - 1)
44 
45 
46 int nilfs_direct_init(struct nilfs_bmap *);
48  __u64 *, int);
49 
50 
51 #endif /* _NILFS_DIRECT_H */