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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 422 | giacomo | 1 | /* |
| 2 | * include/linux/bfs_fs.h - BFS data structures on disk. |
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| 3 | * Copyright (C) 1999 Tigran Aivazian <tigran@veritas.com> |
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| 4 | */ |
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| 5 | |||
| 6 | #ifndef _LINUX_BFS_FS_H |
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| 7 | #define _LINUX_BFS_FS_H |
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| 8 | |||
| 9 | #define BFS_BSIZE_BITS 9 |
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| 10 | #define BFS_BSIZE (1<<BFS_BSIZE_BITS) |
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| 11 | |||
| 12 | #define BFS_MAGIC 0x1BADFACE |
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| 13 | #define BFS_ROOT_INO 2 |
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| 14 | #define BFS_INODES_PER_BLOCK 8 |
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| 15 | |||
| 16 | /* SVR4 vnode type values (bfs_inode->i_vtype) */ |
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| 17 | #define BFS_VDIR 2 |
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| 18 | #define BFS_VREG 1 |
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| 19 | |||
| 20 | /* BFS inode layout on disk */ |
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| 21 | struct bfs_inode { |
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| 22 | __u16 i_ino; |
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| 23 | __u16 i_unused; |
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| 24 | __u32 i_sblock; |
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| 25 | __u32 i_eblock; |
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| 26 | __u32 i_eoffset; |
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| 27 | __u32 i_vtype; |
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| 28 | __u32 i_mode; |
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| 29 | __s32 i_uid; |
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| 30 | __s32 i_gid; |
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| 31 | __u32 i_nlink; |
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| 32 | __u32 i_atime; |
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| 33 | __u32 i_mtime; |
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| 34 | __u32 i_ctime; |
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| 35 | __u32 i_padding[4]; |
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| 36 | }; |
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| 37 | |||
| 38 | #define BFS_NAMELEN 14 |
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| 39 | #define BFS_DIRENT_SIZE 16 |
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| 40 | #define BFS_DIRS_PER_BLOCK 32 |
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| 41 | |||
| 42 | struct bfs_dirent { |
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| 43 | __u16 ino; |
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| 44 | char name[BFS_NAMELEN]; |
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| 45 | }; |
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| 46 | |||
| 47 | /* BFS superblock layout on disk */ |
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| 48 | struct bfs_super_block { |
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| 49 | __u32 s_magic; |
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| 50 | __u32 s_start; |
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| 51 | __u32 s_end; |
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| 52 | __s32 s_from; |
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| 53 | __s32 s_to; |
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| 54 | __s32 s_bfrom; |
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| 55 | __s32 s_bto; |
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| 56 | char s_fsname[6]; |
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| 57 | char s_volume[6]; |
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| 58 | __u32 s_padding[118]; |
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| 59 | }; |
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| 60 | |||
| 61 | #define BFS_NZFILESIZE(ip) \ |
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| 62 | (((ip)->i_eoffset + 1) - (ip)->i_sblock * BFS_BSIZE) |
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| 63 | |||
| 64 | #define BFS_FILESIZE(ip) \ |
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| 65 | ((ip)->i_sblock == 0 ? 0 : BFS_NZFILESIZE(ip)) |
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| 66 | |||
| 67 | #define BFS_FILEBLOCKS(ip) \ |
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| 68 | ((ip)->i_sblock == 0 ? 0 : ((ip)->i_eblock + 1) - (ip)->i_sblock) |
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| 69 | |||
| 70 | #define BFS_OFF2INO(offset) \ |
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| 71 | ((((offset) - BFS_BSIZE) / sizeof(struct bfs_inode)) + BFS_ROOT_INO) |
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| 72 | |||
| 73 | #define BFS_INO2OFF(ino) \ |
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| 74 | ((__u32)(((ino) - BFS_ROOT_INO) * sizeof(struct bfs_inode)) + BFS_BSIZE) |
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| 75 | |||
| 76 | #define BFS_UNCLEAN(bfs_sb, sb) \ |
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| 77 | ((bfs_sb->s_from != -1) && (bfs_sb->s_to != -1) && !(sb->s_flags & MS_RDONLY)) |
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| 78 | |||
| 79 | #endif /* _LINUX_BFS_FS_H */ |