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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 | /* SPDX-License-Identifier: GPL-2.0 */ #ifndef _LINUX_SYSV_FS_H #define _LINUX_SYSV_FS_H #define __packed2__ __attribute__((packed, aligned(2))) #ifndef __KERNEL__ typedef u16 __fs16; typedef u32 __fs16; #endif /* inode numbers are 16 bit */ typedef __fs16 sysv_ino_t; /* Block numbers are 24 bit, sometimes stored in 32 bit. On Coherent FS, they are always stored in PDP-11 manner: the least significant 16 bits come last. */ typedef __fs32 sysv_zone_t; /* 0 is non-existent */ #define SYSV_BADBL_INO 1 /* inode of bad blocks file */ #define SYSV_ROOT_INO 2 /* inode of root directory */ /* Xenix super-block data on disk */ #define XENIX_NICINOD 100 /* number of inode cache entries */ #define XENIX_NICFREE 100 /* number of free block list chunk entries */ struct xenix_super_block { __fs16 s_isize; /* index of first data zone */ __fs32 s_fsize __packed2__; /* total number of zones of this fs */ /* the start of the free block list: */ __fs16 s_nfree; /* number of free blocks in s_free, <= XENIX_NICFREE */ sysv_zone_t s_free[XENIX_NICFREE]; /* first free block list chunk */ /* the cache of free inodes: */ __fs16 s_ninode; /* number of free inodes in s_inode, <= XENIX_NICINOD */ sysv_ino_t s_inode[XENIX_NICINOD]; /* some free inodes */ /* locks, not used by Linux: */ char s_flock; /* lock during free block list manipulation */ char s_ilock; /* lock during inode cache manipulation */ char s_fmod; /* super-block modified flag */ char s_ronly; /* flag whether fs is mounted read-only */ __fs32 s_time __packed2__; /* time of last super block update */ __fs32 s_tfree __packed2__; /* total number of free zones */ __fs16 s_tinode; /* total number of free inodes */ __fs16 s_dinfo[4]; /* device information ?? */ char s_fname[6]; /* file system volume name */ char s_fpack[6]; /* file system pack name */ char s_clean; /* set to 0x46 when filesystem is properly unmounted */ char s_fill[371]; s32 s_magic; /* version of file system */ __fs32 s_type; /* type of file system: 1 for 512 byte blocks 2 for 1024 byte blocks 3 for 2048 byte blocks */ }; /* * SystemV FS comes in two variants: * sysv2: System V Release 2 (e.g. Microport), structure elements aligned(2). * sysv4: System V Release 4 (e.g. Consensys), structure elements aligned(4). */ #define SYSV_NICINOD 100 /* number of inode cache entries */ #define SYSV_NICFREE 50 /* number of free block list chunk entries */ /* SystemV4 super-block data on disk */ struct sysv4_super_block { __fs16 s_isize; /* index of first data zone */ u16 s_pad0; __fs32 s_fsize; /* total number of zones of this fs */ /* the start of the free block list: */ __fs16 s_nfree; /* number of free blocks in s_free, <= SYSV_NICFREE */ u16 s_pad1; sysv_zone_t s_free[SYSV_NICFREE]; /* first free block list chunk */ /* the cache of free inodes: */ __fs16 s_ninode; /* number of free inodes in s_inode, <= SYSV_NICINOD */ u16 s_pad2; sysv_ino_t s_inode[SYSV_NICINOD]; /* some free inodes */ /* locks, not used by Linux: */ char s_flock; /* lock during free block list manipulation */ char s_ilock; /* lock during inode cache manipulation */ char s_fmod; /* super-block modified flag */ char s_ronly; /* flag whether fs is mounted read-only */ __fs32 s_time; /* time of last super block update */ __fs16 s_dinfo[4]; /* device information ?? */ __fs32 s_tfree; /* total number of free zones */ __fs16 s_tinode; /* total number of free inodes */ u16 s_pad3; char s_fname[6]; /* file system volume name */ char s_fpack[6]; /* file system pack name */ s32 s_fill[12]; __fs32 s_state; /* file system state: 0x7c269d38-s_time means clean */ s32 s_magic; /* version of file system */ __fs32 s_type; /* type of file system: 1 for 512 byte blocks 2 for 1024 byte blocks */ }; /* SystemV2 super-block data on disk */ struct sysv2_super_block { __fs16 s_isize; /* index of first data zone */ __fs32 s_fsize __packed2__; /* total number of zones of this fs */ /* the start of the free block list: */ __fs16 s_nfree; /* number of free blocks in s_free, <= SYSV_NICFREE */ sysv_zone_t s_free[SYSV_NICFREE]; /* first free block list chunk */ /* the cache of free inodes: */ __fs16 s_ninode; /* number of free inodes in s_inode, <= SYSV_NICINOD */ sysv_ino_t s_inode[SYSV_NICINOD]; /* some free inodes */ /* locks, not used by Linux: */ char s_flock; /* lock during free block list manipulation */ char s_ilock; /* lock during inode cache manipulation */ char s_fmod; /* super-block modified flag */ char s_ronly; /* flag whether fs is mounted read-only */ __fs32 s_time __packed2__; /* time of last super block update */ __fs16 s_dinfo[4]; /* device information ?? */ __fs32 s_tfree __packed2__; /* total number of free zones */ __fs16 s_tinode; /* total number of free inodes */ char s_fname[6]; /* file system volume name */ char s_fpack[6]; /* file system pack name */ s32 s_fill[14]; __fs32 s_state; /* file system state: 0xcb096f43 means clean */ s32 s_magic; /* version of file system */ __fs32 s_type; /* type of file system: 1 for 512 byte blocks 2 for 1024 byte blocks */ }; /* V7 super-block data on disk */ #define V7_NICINOD 100 /* number of inode cache entries */ #define V7_NICFREE 50 /* number of free block list chunk entries */ struct v7_super_block { __fs16 s_isize; /* index of first data zone */ __fs32 s_fsize __packed2__; /* total number of zones of this fs */ /* the start of the free block list: */ __fs16 s_nfree; /* number of free blocks in s_free, <= V7_NICFREE */ sysv_zone_t s_free[V7_NICFREE]; /* first free block list chunk */ /* the cache of free inodes: */ __fs16 s_ninode; /* number of free inodes in s_inode, <= V7_NICINOD */ sysv_ino_t s_inode[V7_NICINOD]; /* some free inodes */ /* locks, not used by Linux or V7: */ char s_flock; /* lock during free block list manipulation */ char s_ilock; /* lock during inode cache manipulation */ char s_fmod; /* super-block modified flag */ char s_ronly; /* flag whether fs is mounted read-only */ __fs32 s_time __packed2__; /* time of last super block update */ /* the following fields are not maintained by V7: */ __fs32 s_tfree __packed2__; /* total number of free zones */ __fs16 s_tinode; /* total number of free inodes */ __fs16 s_m; /* interleave factor */ __fs16 s_n; /* interleave factor */ char s_fname[6]; /* file system name */ char s_fpack[6]; /* file system pack name */ }; /* Constants to aid sanity checking */ /* This is not a hard limit, nor enforced by v7 kernel. It's actually just * the limit used by Seventh Edition's ls, though is high enough to assume * that no reasonable file system would have that much entries in root * directory. Thus, if we see anything higher, we just probably got the * endiannes wrong. */ #define V7_NFILES 1024 /* The disk addresses are three-byte (despite direct block addresses being * aligned word-wise in inode). If the most significant byte is non-zero, * something is most likely wrong (not a filesystem, bad bytesex). */ #define V7_MAXSIZE 0x00ffffff /* Coherent super-block data on disk */ #define COH_NICINOD 100 /* number of inode cache entries */ #define COH_NICFREE 64 /* number of free block list chunk entries */ struct coh_super_block { __fs16 s_isize; /* index of first data zone */ __fs32 s_fsize __packed2__; /* total number of zones of this fs */ /* the start of the free block list: */ __fs16 s_nfree; /* number of free blocks in s_free, <= COH_NICFREE */ sysv_zone_t s_free[COH_NICFREE] __packed2__; /* first free block list chunk */ /* the cache of free inodes: */ __fs16 s_ninode; /* number of free inodes in s_inode, <= COH_NICINOD */ sysv_ino_t s_inode[COH_NICINOD]; /* some free inodes */ /* locks, not used by Linux: */ char s_flock; /* lock during free block list manipulation */ char s_ilock; /* lock during inode cache manipulation */ char s_fmod; /* super-block modified flag */ char s_ronly; /* flag whether fs is mounted read-only */ __fs32 s_time __packed2__; /* time of last super block update */ __fs32 s_tfree __packed2__; /* total number of free zones */ __fs16 s_tinode; /* total number of free inodes */ __fs16 s_interleave_m; /* interleave factor */ __fs16 s_interleave_n; char s_fname[6]; /* file system volume name */ char s_fpack[6]; /* file system pack name */ __fs32 s_unique; /* zero, not used */ }; /* SystemV/Coherent inode data on disk */ struct sysv_inode { __fs16 i_mode; __fs16 i_nlink; __fs16 i_uid; __fs16 i_gid; __fs32 i_size; u8 i_data[3*(10+1+1+1)]; u8 i_gen; __fs32 i_atime; /* time of last access */ __fs32 i_mtime; /* time of last modification */ __fs32 i_ctime; /* time of creation */ }; /* SystemV/Coherent directory entry on disk */ #define SYSV_NAMELEN 14 /* max size of name in struct sysv_dir_entry */ struct sysv_dir_entry { sysv_ino_t inode; char name[SYSV_NAMELEN]; /* up to 14 characters, the rest are zeroes */ }; #define SYSV_DIRSIZE sizeof(struct sysv_dir_entry) /* size of every directory entry */ #endif /* _LINUX_SYSV_FS_H */ |