busybox/e2fsprogs/blkid/probe.h
2006-11-27 16:48:17 +00:00

376 lines
8.7 KiB
C

/* vi: set sw=4 ts=4: */
/*
* probe.h - constants and on-disk structures for extracting device data
*
* Copyright (C) 1999 by Andries Brouwer
* Copyright (C) 1999, 2000, 2003 by Theodore Ts'o
* Copyright (C) 2001 by Andreas Dilger
*
* %Begin-Header%
* This file may be redistributed under the terms of the
* GNU Lesser General Public License.
* %End-Header%
*/
#ifndef _BLKID_PROBE_H
#define _BLKID_PROBE_H
#include <linux/types.h>
struct blkid_magic;
typedef int (*blkid_probe_t)(int fd, blkid_cache cache, blkid_dev dev,
const struct blkid_magic *id, unsigned char *buf);
struct blkid_magic {
const char *bim_type; /* type name for this magic */
long bim_kboff; /* kilobyte offset of superblock */
unsigned bim_sboff; /* byte offset within superblock */
unsigned bim_len; /* length of magic */
const char *bim_magic; /* magic string */
blkid_probe_t bim_probe; /* probe function */
};
/*
* Structures for each of the content types we want to extract information
* from. We do not necessarily need the magic field here, because we have
* already identified the content type before we get this far. It may still
* be useful if there are probe functions which handle multiple content types.
*/
struct ext2_super_block {
__u32 s_inodes_count;
__u32 s_blocks_count;
__u32 s_r_blocks_count;
__u32 s_free_blocks_count;
__u32 s_free_inodes_count;
__u32 s_first_data_block;
__u32 s_log_block_size;
__u32 s_dummy3[7];
unsigned char s_magic[2];
__u16 s_state;
__u32 s_dummy5[8];
__u32 s_feature_compat;
__u32 s_feature_incompat;
__u32 s_feature_ro_compat;
unsigned char s_uuid[16];
char s_volume_name[16];
};
#define EXT3_FEATURE_COMPAT_HAS_JOURNAL 0x00000004
#define EXT3_FEATURE_INCOMPAT_RECOVER 0x00000004
#define EXT3_FEATURE_INCOMPAT_JOURNAL_DEV 0x00000008
struct xfs_super_block {
unsigned char xs_magic[4];
__u32 xs_blocksize;
__u64 xs_dblocks;
__u64 xs_rblocks;
__u32 xs_dummy1[2];
unsigned char xs_uuid[16];
__u32 xs_dummy2[15];
char xs_fname[12];
__u32 xs_dummy3[2];
__u64 xs_icount;
__u64 xs_ifree;
__u64 xs_fdblocks;
};
struct reiserfs_super_block {
__u32 rs_blocks_count;
__u32 rs_free_blocks;
__u32 rs_root_block;
__u32 rs_journal_block;
__u32 rs_journal_dev;
__u32 rs_orig_journal_size;
__u32 rs_dummy2[5];
__u16 rs_blocksize;
__u16 rs_dummy3[3];
unsigned char rs_magic[12];
__u32 rs_dummy4[5];
unsigned char rs_uuid[16];
char rs_label[16];
};
struct jfs_super_block {
unsigned char js_magic[4];
__u32 js_version;
__u64 js_size;
__u32 js_bsize;
__u32 js_dummy1;
__u32 js_pbsize;
__u32 js_dummy2[27];
unsigned char js_uuid[16];
unsigned char js_label[16];
unsigned char js_loguuid[16];
};
struct romfs_super_block {
unsigned char ros_magic[8];
__u32 ros_dummy1[2];
unsigned char ros_volume[16];
};
struct cramfs_super_block {
__u8 magic[4];
__u32 size;
__u32 flags;
__u32 future;
__u8 signature[16];
struct cramfs_info {
__u32 crc;
__u32 edition;
__u32 blocks;
__u32 files;
} info;
__u8 name[16];
};
struct swap_id_block {
/* unsigned char sws_boot[1024]; */
__u32 sws_version;
__u32 sws_lastpage;
__u32 sws_nrbad;
unsigned char sws_uuid[16];
char sws_volume[16];
unsigned char sws_pad[117];
__u32 sws_badpg;
};
/* Yucky misaligned values */
struct vfat_super_block {
/* 00*/ unsigned char vs_ignored[3];
/* 03*/ unsigned char vs_sysid[8];
/* 0b*/ unsigned char vs_sector_size[2];
/* 0d*/ __u8 vs_cluster_size;
/* 0e*/ __u16 vs_reserved;
/* 10*/ __u8 vs_fats;
/* 11*/ unsigned char vs_dir_entries[2];
/* 13*/ unsigned char vs_sectors[2];
/* 15*/ unsigned char vs_media;
/* 16*/ __u16 vs_fat_length;
/* 18*/ __u16 vs_secs_track;
/* 1a*/ __u16 vs_heads;
/* 1c*/ __u32 vs_hidden;
/* 20*/ __u32 vs_total_sect;
/* 24*/ __u32 vs_fat32_length;
/* 28*/ __u16 vs_flags;
/* 2a*/ __u8 vs_version[2];
/* 2c*/ __u32 vs_root_cluster;
/* 30*/ __u16 vs_insfo_sector;
/* 32*/ __u16 vs_backup_boot;
/* 34*/ __u16 vs_reserved2[6];
/* 40*/ unsigned char vs_unknown[3];
/* 43*/ unsigned char vs_serno[4];
/* 47*/ char vs_label[11];
/* 52*/ unsigned char vs_magic[8];
/* 5a*/ unsigned char vs_dummy2[164];
/*1fe*/ unsigned char vs_pmagic[2];
};
/* Yucky misaligned values */
struct msdos_super_block {
/* 00*/ unsigned char ms_ignored[3];
/* 03*/ unsigned char ms_sysid[8];
/* 0b*/ unsigned char ms_sector_size[2];
/* 0d*/ __u8 ms_cluster_size;
/* 0e*/ __u16 ms_reserved;
/* 10*/ __u8 ms_fats;
/* 11*/ unsigned char ms_dir_entries[2];
/* 13*/ unsigned char ms_sectors[2];
/* 15*/ unsigned char ms_media;
/* 16*/ __u16 ms_fat_length;
/* 18*/ __u16 ms_secs_track;
/* 1a*/ __u16 ms_heads;
/* 1c*/ __u32 ms_hidden;
/* 20*/ __u32 ms_total_sect;
/* 24*/ unsigned char ms_unknown[3];
/* 27*/ unsigned char ms_serno[4];
/* 2b*/ char ms_label[11];
/* 36*/ unsigned char ms_magic[8];
/* 3d*/ unsigned char ms_dummy2[192];
/*1fe*/ unsigned char ms_pmagic[2];
};
struct minix_super_block {
__u16 ms_ninodes;
__u16 ms_nzones;
__u16 ms_imap_blocks;
__u16 ms_zmap_blocks;
__u16 ms_firstdatazone;
__u16 ms_log_zone_size;
__u32 ms_max_size;
unsigned char ms_magic[2];
__u16 ms_state;
__u32 ms_zones;
};
struct mdp_superblock_s {
__u32 md_magic;
__u32 major_version;
__u32 minor_version;
__u32 patch_version;
__u32 gvalid_words;
__u32 set_uuid0;
__u32 ctime;
__u32 level;
__u32 size;
__u32 nr_disks;
__u32 raid_disks;
__u32 md_minor;
__u32 not_persistent;
__u32 set_uuid1;
__u32 set_uuid2;
__u32 set_uuid3;
};
struct hfs_super_block {
char h_magic[2];
char h_dummy[18];
__u32 h_blksize;
};
struct ocfs_volume_header {
unsigned char minor_version[4];
unsigned char major_version[4];
unsigned char signature[128];
char mount[128];
unsigned char mount_len[2];
};
struct ocfs_volume_label {
unsigned char disk_lock[48];
char label[64];
unsigned char label_len[2];
unsigned char vol_id[16];
unsigned char vol_id_len[2];
};
#define ocfsmajor(o) ((__u32)o.major_version[0] \
+ (((__u32) o.major_version[1]) << 8) \
+ (((__u32) o.major_version[2]) << 16) \
+ (((__u32) o.major_version[3]) << 24))
#define ocfslabellen(o) ((__u32)o.label_len[0] + (((__u32) o.label_len[1]) << 8))
#define ocfsmountlen(o) ((__u32)o.mount_len[0] + (((__u32) o.mount_len[1])<<8))
#define OCFS_MAGIC "OracleCFS"
struct ocfs2_super_block {
unsigned char signature[8];
unsigned char s_dummy1[184];
unsigned char s_dummy2[80];
char s_label[64];
unsigned char s_uuid[16];
};
#define OCFS2_MIN_BLOCKSIZE 512
#define OCFS2_MAX_BLOCKSIZE 4096
#define OCFS2_SUPER_BLOCK_BLKNO 2
#define OCFS2_SUPER_BLOCK_SIGNATURE "OCFSV2"
struct oracle_asm_disk_label {
char dummy[32];
char dl_tag[8];
char dl_id[24];
};
#define ORACLE_ASM_DISK_LABEL_MARKED "ORCLDISK"
#define ORACLE_ASM_DISK_LABEL_OFFSET 32
#define ISODCL(from, to) (to - from + 1)
struct iso_volume_descriptor {
char type[ISODCL(1,1)]; /* 711 */
char id[ISODCL(2,6)];
char version[ISODCL(7,7)];
char data[ISODCL(8,2048)];
};
/*
* Byte swap functions
*/
#ifdef __GNUC__
#define _INLINE_ static __inline__
#else /* For Watcom C */
#define _INLINE_ static inline
#endif
static __u16 blkid_swab16(__u16 val);
static __u32 blkid_swab32(__u32 val);
static __u64 blkid_swab64(__u64 val);
#if ((defined __GNUC__) && \
(defined(__i386__) || defined(__i486__) || defined(__i586__)))
#define _BLKID_HAVE_ASM_BITOPS_
_INLINE_ __u32 blkid_swab32(__u32 val)
{
#ifdef EXT2FS_REQUIRE_486
__asm__("bswap %0" : "=r" (val) : "0" (val));
#else
__asm__("xchgb %b0,%h0\n\t" /* swap lower bytes */
"rorl $16,%0\n\t" /* swap words */
"xchgb %b0,%h0" /* swap higher bytes */
:"=q" (val)
: "0" (val));
#endif
return val;
}
_INLINE_ __u16 blkid_swab16(__u16 val)
{
__asm__("xchgb %b0,%h0" /* swap bytes */ \
: "=q" (val) \
: "0" (val)); \
return val;
}
_INLINE_ __u64 blkid_swab64(__u64 val)
{
return blkid_swab32(val >> 32) |
( ((__u64)blkid_swab32((__u32)val)) << 32 );
}
#endif
#if !defined(_BLKID_HAVE_ASM_BITOPS_)
_INLINE_ __u16 blkid_swab16(__u16 val)
{
return (val >> 8) | (val << 8);
}
_INLINE_ __u32 blkid_swab32(__u32 val)
{
return (val>>24) | ((val>>8) & 0xFF00) |
((val<<8) & 0xFF0000) | (val<<24);
}
_INLINE_ __u64 blkid_swab64(__u64 val)
{
return blkid_swab32(val >> 32) |
( ((__u64)blkid_swab32((__u32)val)) << 32 );
}
#endif
#if __BYTE_ORDER == __BIG_ENDIAN
#define blkid_le16(x) blkid_swab16(x)
#define blkid_le32(x) blkid_swab32(x)
#define blkid_le64(x) blkid_swab64(x)
#define blkid_be16(x) (x)
#define blkid_be32(x) (x)
#define blkid_be64(x) (x)
#else
#define blkid_le16(x) (x)
#define blkid_le32(x) (x)
#define blkid_le64(x) (x)
#define blkid_be16(x) blkid_swab16(x)
#define blkid_be32(x) blkid_swab32(x)
#define blkid_be64(x) blkid_swab64(x)
#endif
#undef _INLINE_
#endif /* _BLKID_PROBE_H */