/* File: sysv.c Copyright (C) 2004-2007 Christophe GRENIER This software is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, write the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. */ #ifndef _SYSV_H #define _SYSV_H #ifdef __cplusplus extern "C" { #endif #define SYSV4_SUPERBLOCK_SIZE 512 #define __packed2__ __attribute__ ((packed, aligned(2))) /* inode numbers are 16 bit */ typedef uint16_t 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 uint32_t sysv_zone_t; */ /* Among the blocks ... */ /* Xenix FS, Coherent FS: block 0 is the boot block, block 1 the super-block. SystemV FS: block 0 contains both the boot sector and the super-block. */ /* The first inode zone is sb->sv_firstinodezone (1 or 2). */ /* Among the inodes ... */ /* 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 { uint16_t s_isize; /* index of first data zone */ uint32_t s_fsize __packed2__; /* total number of zones of this fs */ /* the start of the free block list: */ uint16_t s_nfree; /* number of free blocks in s_free, <= XENIX_NICFREE */ uint32_t s_free[XENIX_NICFREE]; /* first free block list chunk */ /* the cache of free inodes: */ uint16_t 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 */ uint32_t s_time __packed2__; /* time of last super block update */ uint32_t s_tfree __packed2__; /* total number of free zones */ uint16_t s_tinode; /* total number of free inodes */ int16_t 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]; int32_t s_magic; /* version of file system */ int32_t 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 { uint16_t s_isize; /* 0x00 index of first data zone */ uint16_t s_pad0; /* 0x02 */ uint32_t s_fsize; /* 0x04 total number of zones of this fs */ /* the start of the free block list: */ uint16_t s_nfree; /* 0x08 number of free blocks in s_free, <= SYSV_NICFREE */ uint16_t s_pad1; /* 0x0a */ uint32_t s_free[SYSV_NICFREE]; /* 0x0c first free block list chunk */ /* the cache of free inodes: */ uint16_t s_ninode; /* 0xd4 number of free inodes in s_inode, <= SYSV_NICINOD */ uint16_t s_pad2; /* 0xd6 */ sysv_ino_t s_inode[SYSV_NICINOD]; /* 0xd8 some free inodes */ char s_flock; /* 0x1a0 lock during free block list manipulation */ char s_ilock; /* 0x1a1 lock during inode cache manipulation */ char s_fmod; /* 0x1a2 super-block modified flag */ char s_ronly; /* 0x1a3 flag whether fs is mounted read-only */ uint32_t s_time; /* 0x1a4 time of last super block update */ int16_t s_dinfo[4]; /* 0x1a8 device information ?? */ uint32_t s_tfree; /* 0x1b0 total number of free zones */ uint16_t s_tinode; /* 0x1b4 total number of free inodes */ char s_fname[6]; /* 0x1b6 file system volume name */ char s_fpack[6]; /* 0x1bc file system pack name */ uint16_t s_pad3; /* 0x1c2 */ int32_t s_fill[12]; /* 0x1c4 */ int32_t s_state; /* 0x1f4 file system state: 0x7c269d38-s_time means clean */ int32_t s_magic; /* 0x1f8 version of file system */ int32_t s_type; /* 0x1fc type of file system: 1 for 512 byte blocks 2 for 1024 byte blocks */ } __attribute__ ((gcc_struct, __packed__)); /* SystemV2 super-block data on disk */ struct sysv2_super_block { uint16_t s_isize; /* 0x00 index of first data zone */ uint32_t s_fsize __packed2__; /* 0x02 total number of zones of this fs */ /* the start of the free block list: */ uint16_t s_nfree; /* number of free blocks in s_free, <= SYSV_NICFREE */ uint32_t s_free[SYSV_NICFREE]; /* first free block list chunk */ /* the cache of free inodes: */ uint16_t 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 */ uint32_t s_time __packed2__; /* time of last super block update */ int16_t s_dinfo[4]; /* device information ?? */ uint32_t s_tfree __packed2__; /* total number of free zones */ uint16_t s_tinode; /* total number of free inodes */ char s_fname[6]; /* file system volume name */ char s_fpack[6]; /* file system pack name */ int32_t s_fill[14]; int32_t s_state; /* file system state: 0xcb096f43 means clean */ int32_t s_magic; /* version of file system */ int32_t 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 { uint16_t s_isize; /* index of first data zone */ uint32_t s_fsize __packed2__; /* total number of zones of this fs */ /* the start of the free block list: */ uint16_t s_nfree; /* number of free blocks in s_free, <= V7_NICFREE */ uint32_t s_free[V7_NICFREE]; /* first free block list chunk */ /* the cache of free inodes: */ uint16_t 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 */ uint32_t s_time __packed2__; /* time of last super block update */ /* the following fields are not maintained by V7: */ uint32_t s_tfree __packed2__; /* total number of free zones */ uint16_t s_tinode; /* total number of free inodes */ uint16_t s_m; /* interleave factor */ uint16_t 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 { uint16_t s_isize; /* index of first data zone */ uint32_t s_fsize __packed2__; /* total number of zones of this fs */ /* the start of the free block list: */ uint16_t s_nfree; /* number of free blocks in s_free, <= COH_NICFREE */ uint32_t s_free[COH_NICFREE] __packed2__; /* first free block list chunk */ /* the cache of free inodes: */ uint16_t 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 */ uint32_t s_time __packed2__; /* time of last super block update */ uint32_t s_tfree __packed2__; /* total number of free zones */ uint16_t s_tinode; /* total number of free inodes */ uint16_t s_interleave_m; /* interleave factor */ uint16_t s_interleave_n; char s_fname[6]; /* file system volume name */ char s_fpack[6]; /* file system pack name */ uint32_t s_unique; /* zero, not used */ }; /*@ @ decreases 0; @*/ int check_sysv(disk_t *disk_car,partition_t *partition,const int verbose); int recover_sysv(const disk_t *disk_car, const struct sysv4_super_block *sbd, partition_t *partition,const int verbose, const int dump_ind); #ifdef __cplusplus } /* closing brace for extern "C" */ #endif #endif