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