/* 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 */