--- /dev/null
+#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 */
Code Review / kvmfornfv.git / blobdiff