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