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| Rev | Author | Line No. | Line |
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| 422 | giacomo | 1 | #ifndef _LINUX_SYSV_FS_H |
| 2 | #define _LINUX_SYSV_FS_H |
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| 3 | |||
| 4 | #if defined(__GNUC__) |
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| 5 | # define __packed2__ __attribute__((packed, aligned(2))) |
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| 6 | #else |
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| 7 | >> I want to scream! << |
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| 8 | #endif |
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| 9 | |||
| 10 | |||
| 11 | /* inode numbers are 16 bit */ |
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| 12 | typedef u16 sysv_ino_t; |
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| 13 | |||
| 14 | /* Block numbers are 24 bit, sometimes stored in 32 bit. |
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| 15 | On Coherent FS, they are always stored in PDP-11 manner: the least |
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| 16 | significant 16 bits come last. */ |
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| 17 | typedef u32 sysv_zone_t; |
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| 18 | |||
| 19 | /* 0 is non-existent */ |
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| 20 | #define SYSV_BADBL_INO 1 /* inode of bad blocks file */ |
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| 21 | #define SYSV_ROOT_INO 2 /* inode of root directory */ |
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| 22 | |||
| 23 | |||
| 24 | /* Xenix super-block data on disk */ |
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| 25 | #define XENIX_NICINOD 100 /* number of inode cache entries */ |
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| 26 | #define XENIX_NICFREE 100 /* number of free block list chunk entries */ |
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| 27 | struct xenix_super_block { |
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| 28 | u16 s_isize; /* index of first data zone */ |
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| 29 | u32 s_fsize __packed2__; /* total number of zones of this fs */ |
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| 30 | /* the start of the free block list: */ |
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| 31 | u16 s_nfree; /* number of free blocks in s_free, <= XENIX_NICFREE */ |
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| 32 | u32 s_free[XENIX_NICFREE]; /* first free block list chunk */ |
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| 33 | /* the cache of free inodes: */ |
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| 34 | u16 s_ninode; /* number of free inodes in s_inode, <= XENIX_NICINOD */ |
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| 35 | sysv_ino_t s_inode[XENIX_NICINOD]; /* some free inodes */ |
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| 36 | /* locks, not used by Linux: */ |
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| 37 | char s_flock; /* lock during free block list manipulation */ |
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| 38 | char s_ilock; /* lock during inode cache manipulation */ |
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| 39 | char s_fmod; /* super-block modified flag */ |
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| 40 | char s_ronly; /* flag whether fs is mounted read-only */ |
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| 41 | u32 s_time __packed2__; /* time of last super block update */ |
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| 42 | u32 s_tfree __packed2__; /* total number of free zones */ |
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| 43 | u16 s_tinode; /* total number of free inodes */ |
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| 44 | s16 s_dinfo[4]; /* device information ?? */ |
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| 45 | char s_fname[6]; /* file system volume name */ |
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| 46 | char s_fpack[6]; /* file system pack name */ |
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| 47 | char s_clean; /* set to 0x46 when filesystem is properly unmounted */ |
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| 48 | char s_fill[371]; |
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| 49 | s32 s_magic; /* version of file system */ |
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| 50 | s32 s_type; /* type of file system: 1 for 512 byte blocks |
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| 51 | 2 for 1024 byte blocks |
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| 52 | 3 for 2048 byte blocks */ |
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| 53 | |||
| 54 | }; |
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| 55 | |||
| 56 | /* |
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| 57 | * SystemV FS comes in two variants: |
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| 58 | * sysv2: System V Release 2 (e.g. Microport), structure elements aligned(2). |
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| 59 | * sysv4: System V Release 4 (e.g. Consensys), structure elements aligned(4). |
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| 60 | */ |
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| 61 | #define SYSV_NICINOD 100 /* number of inode cache entries */ |
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| 62 | #define SYSV_NICFREE 50 /* number of free block list chunk entries */ |
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| 63 | |||
| 64 | /* SystemV4 super-block data on disk */ |
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| 65 | struct sysv4_super_block { |
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| 66 | u16 s_isize; /* index of first data zone */ |
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| 67 | u16 s_pad0; |
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| 68 | u32 s_fsize; /* total number of zones of this fs */ |
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| 69 | /* the start of the free block list: */ |
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| 70 | u16 s_nfree; /* number of free blocks in s_free, <= SYSV_NICFREE */ |
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| 71 | u16 s_pad1; |
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| 72 | u32 s_free[SYSV_NICFREE]; /* first free block list chunk */ |
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| 73 | /* the cache of free inodes: */ |
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| 74 | u16 s_ninode; /* number of free inodes in s_inode, <= SYSV_NICINOD */ |
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| 75 | u16 s_pad2; |
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| 76 | sysv_ino_t s_inode[SYSV_NICINOD]; /* some free inodes */ |
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| 77 | /* locks, not used by Linux: */ |
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| 78 | char s_flock; /* lock during free block list manipulation */ |
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| 79 | char s_ilock; /* lock during inode cache manipulation */ |
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| 80 | char s_fmod; /* super-block modified flag */ |
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| 81 | char s_ronly; /* flag whether fs is mounted read-only */ |
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| 82 | u32 s_time; /* time of last super block update */ |
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| 83 | s16 s_dinfo[4]; /* device information ?? */ |
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| 84 | u32 s_tfree; /* total number of free zones */ |
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| 85 | u16 s_tinode; /* total number of free inodes */ |
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| 86 | u16 s_pad3; |
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| 87 | char s_fname[6]; /* file system volume name */ |
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| 88 | char s_fpack[6]; /* file system pack name */ |
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| 89 | s32 s_fill[12]; |
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| 90 | s32 s_state; /* file system state: 0x7c269d38-s_time means clean */ |
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| 91 | s32 s_magic; /* version of file system */ |
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| 92 | s32 s_type; /* type of file system: 1 for 512 byte blocks |
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| 93 | 2 for 1024 byte blocks */ |
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| 94 | }; |
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| 95 | |||
| 96 | /* SystemV2 super-block data on disk */ |
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| 97 | struct sysv2_super_block { |
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| 98 | u16 s_isize; /* index of first data zone */ |
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| 99 | u32 s_fsize __packed2__; /* total number of zones of this fs */ |
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| 100 | /* the start of the free block list: */ |
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| 101 | u16 s_nfree; /* number of free blocks in s_free, <= SYSV_NICFREE */ |
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| 102 | u32 s_free[SYSV_NICFREE]; /* first free block list chunk */ |
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| 103 | /* the cache of free inodes: */ |
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| 104 | u16 s_ninode; /* number of free inodes in s_inode, <= SYSV_NICINOD */ |
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| 105 | sysv_ino_t s_inode[SYSV_NICINOD]; /* some free inodes */ |
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| 106 | /* locks, not used by Linux: */ |
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| 107 | char s_flock; /* lock during free block list manipulation */ |
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| 108 | char s_ilock; /* lock during inode cache manipulation */ |
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| 109 | char s_fmod; /* super-block modified flag */ |
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| 110 | char s_ronly; /* flag whether fs is mounted read-only */ |
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| 111 | u32 s_time __packed2__; /* time of last super block update */ |
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| 112 | s16 s_dinfo[4]; /* device information ?? */ |
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| 113 | u32 s_tfree __packed2__; /* total number of free zones */ |
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| 114 | u16 s_tinode; /* total number of free inodes */ |
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| 115 | char s_fname[6]; /* file system volume name */ |
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| 116 | char s_fpack[6]; /* file system pack name */ |
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| 117 | s32 s_fill[14]; |
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| 118 | s32 s_state; /* file system state: 0xcb096f43 means clean */ |
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| 119 | s32 s_magic; /* version of file system */ |
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| 120 | s32 s_type; /* type of file system: 1 for 512 byte blocks |
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| 121 | 2 for 1024 byte blocks */ |
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| 122 | }; |
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| 123 | |||
| 124 | /* V7 super-block data on disk */ |
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| 125 | #define V7_NICINOD 100 /* number of inode cache entries */ |
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| 126 | #define V7_NICFREE 50 /* number of free block list chunk entries */ |
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| 127 | struct v7_super_block { |
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| 128 | u16 s_isize; /* index of first data zone */ |
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| 129 | u32 s_fsize __packed2__; /* total number of zones of this fs */ |
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| 130 | /* the start of the free block list: */ |
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| 131 | u16 s_nfree; /* number of free blocks in s_free, <= V7_NICFREE */ |
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| 132 | u32 s_free[V7_NICFREE]; /* first free block list chunk */ |
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| 133 | /* the cache of free inodes: */ |
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| 134 | u16 s_ninode; /* number of free inodes in s_inode, <= V7_NICINOD */ |
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| 135 | sysv_ino_t s_inode[V7_NICINOD]; /* some free inodes */ |
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| 136 | /* locks, not used by Linux or V7: */ |
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| 137 | char s_flock; /* lock during free block list manipulation */ |
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| 138 | char s_ilock; /* lock during inode cache manipulation */ |
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| 139 | char s_fmod; /* super-block modified flag */ |
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| 140 | char s_ronly; /* flag whether fs is mounted read-only */ |
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| 141 | u32 s_time __packed2__; /* time of last super block update */ |
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| 142 | /* the following fields are not maintained by V7: */ |
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| 143 | u32 s_tfree __packed2__; /* total number of free zones */ |
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| 144 | u16 s_tinode; /* total number of free inodes */ |
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| 145 | u16 s_m; /* interleave factor */ |
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| 146 | u16 s_n; /* interleave factor */ |
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| 147 | char s_fname[6]; /* file system name */ |
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| 148 | char s_fpack[6]; /* file system pack name */ |
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| 149 | }; |
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| 150 | |||
| 151 | /* Coherent super-block data on disk */ |
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| 152 | #define COH_NICINOD 100 /* number of inode cache entries */ |
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| 153 | #define COH_NICFREE 64 /* number of free block list chunk entries */ |
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| 154 | struct coh_super_block { |
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| 155 | u16 s_isize; /* index of first data zone */ |
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| 156 | u32 s_fsize __packed2__; /* total number of zones of this fs */ |
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| 157 | /* the start of the free block list: */ |
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| 158 | u16 s_nfree; /* number of free blocks in s_free, <= COH_NICFREE */ |
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| 159 | u32 s_free[COH_NICFREE] __packed2__; /* first free block list chunk */ |
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| 160 | /* the cache of free inodes: */ |
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| 161 | u16 s_ninode; /* number of free inodes in s_inode, <= COH_NICINOD */ |
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| 162 | sysv_ino_t s_inode[COH_NICINOD]; /* some free inodes */ |
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| 163 | /* locks, not used by Linux: */ |
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| 164 | char s_flock; /* lock during free block list manipulation */ |
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| 165 | char s_ilock; /* lock during inode cache manipulation */ |
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| 166 | char s_fmod; /* super-block modified flag */ |
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| 167 | char s_ronly; /* flag whether fs is mounted read-only */ |
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| 168 | u32 s_time __packed2__; /* time of last super block update */ |
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| 169 | u32 s_tfree __packed2__; /* total number of free zones */ |
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| 170 | u16 s_tinode; /* total number of free inodes */ |
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| 171 | u16 s_interleave_m; /* interleave factor */ |
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| 172 | u16 s_interleave_n; |
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| 173 | char s_fname[6]; /* file system volume name */ |
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| 174 | char s_fpack[6]; /* file system pack name */ |
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| 175 | u32 s_unique; /* zero, not used */ |
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| 176 | }; |
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| 177 | |||
| 178 | /* SystemV/Coherent inode data on disk */ |
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| 179 | struct sysv_inode { |
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| 180 | u16 i_mode; |
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| 181 | u16 i_nlink; |
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| 182 | u16 i_uid; |
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| 183 | u16 i_gid; |
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| 184 | u32 i_size; |
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| 185 | u8 i_data[3*(10+1+1+1)]; |
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| 186 | u8 i_gen; |
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| 187 | u32 i_atime; /* time of last access */ |
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| 188 | u32 i_mtime; /* time of last modification */ |
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| 189 | u32 i_ctime; /* time of creation */ |
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| 190 | }; |
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| 191 | |||
| 192 | /* SystemV/Coherent directory entry on disk */ |
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| 193 | #define SYSV_NAMELEN 14 /* max size of name in struct sysv_dir_entry */ |
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| 194 | struct sysv_dir_entry { |
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| 195 | sysv_ino_t inode; |
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| 196 | char name[SYSV_NAMELEN]; /* up to 14 characters, the rest are zeroes */ |
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| 197 | }; |
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| 198 | |||
| 199 | #define SYSV_DIRSIZE sizeof(struct sysv_dir_entry) /* size of every directory entry */ |
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| 200 | |||
| 201 | #endif /* _LINUX_SYSV_FS_H */ |