sysv_fs.h
上传用户:szlgq88
上传日期:2009-04-28
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文件大小:8k
- #ifndef _LINUX_SYSV_FS_H
- #define _LINUX_SYSV_FS_H
- #if defined(__GNUC__)
- # define __packed2__ __attribute__((packed, aligned(2)))
- #else
- >> I want to scream! <<
- #endif
- #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 */