source: svn/trunk/newcon3bcm2_21bu/toolchain/mips-linux-uclibc/include/linux/bfs_fs.h

Last change on this file was 2, checked in by jglee, 11 years ago

first commit
  • Property svn:executable set to *
File size: 1.7 KB
Line 
1/*
2 *      include/linux/bfs_fs.h - BFS data structures on disk.
3 *      Copyright (C) 1999 Tigran Aivazian <tigran@veritas.com>
4 */
5
6#ifndef _LINUX_BFS_FS_H
7#define _LINUX_BFS_FS_H
8
9#include <asm/types.h>
10
11#define BFS_BSIZE_BITS          9
12#define BFS_BSIZE               (1<<BFS_BSIZE_BITS)
13
14#define BFS_MAGIC               0x1BADFACE
15#define BFS_ROOT_INO            2
16#define BFS_INODES_PER_BLOCK    8
17
18/* SVR4 vnode type values (bfs_inode->i_vtype) */
19#define BFS_VDIR                2
20#define BFS_VREG                1
21
22/* BFS inode layout on disk */
23struct bfs_inode {
24        __u16 i_ino;
25        __u16 i_unused;
26        __u32 i_sblock;
27        __u32 i_eblock;
28        __u32 i_eoffset;
29        __u32 i_vtype;
30        __u32 i_mode;
31        __s32 i_uid;
32        __s32 i_gid;
33        __u32 i_nlink;
34        __u32 i_atime;
35        __u32 i_mtime;
36        __u32 i_ctime;
37        __u32 i_padding[4];
38};
39
40#define BFS_NAMELEN             14     
41#define BFS_DIRENT_SIZE         16
42#define BFS_DIRS_PER_BLOCK      32
43
44struct bfs_dirent {
45        __u16 ino;
46        char name[BFS_NAMELEN];
47};
48
49/* BFS superblock layout on disk */
50struct bfs_super_block {
51        __u32 s_magic;
52        __u32 s_start;
53        __u32 s_end;
54        __s32 s_from;
55        __s32 s_to;
56        __s32 s_bfrom;
57        __s32 s_bto;
58        char  s_fsname[6];
59        char  s_volume[6];
60        __u32 s_padding[118];
61};
62
63#define BFS_NZFILESIZE(ip) \
64        (((ip)->i_eoffset + 1) - (ip)->i_sblock * BFS_BSIZE)
65
66#define BFS_FILESIZE(ip) \
67        ((ip)->i_sblock == 0 ? 0 : BFS_NZFILESIZE(ip))
68
69#define BFS_FILEBLOCKS(ip) \
70        ((ip)->i_sblock == 0 ? 0 : ((ip)->i_eblock + 1) - (ip)->i_sblock)
71
72#define BFS_OFF2INO(offset) \
73        ((((offset) - BFS_BSIZE) / sizeof(struct bfs_inode)) + BFS_ROOT_INO)
74
75#define BFS_INO2OFF(ino) \
76        ((__u32)(((ino) - BFS_ROOT_INO) * sizeof(struct bfs_inode)) + BFS_BSIZE)
77
78#define BFS_UNCLEAN(bfs_sb, sb) \
79        ((bfs_sb->s_from != -1) && (bfs_sb->s_to != -1) && !(sb->s_flags & MS_RDONLY))
80
81#endif  /* _LINUX_BFS_FS_H */
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