| #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 */ |
| }; |
| |
| /* 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 */ |