1 /* 2 * probe.h - constants and on-disk structures for extracting device data 3 * 4 * Copyright (C) 1999 by Andries Brouwer 5 * Copyright (C) 1999, 2000, 2003 by Theodore Ts'o 6 * Copyright (C) 2001 by Andreas Dilger 7 * 8 * %Begin-Header% 9 * This file may be redistributed under the terms of the 10 * GNU Lesser General Public License. 11 * %End-Header% 12 */ 13 14 #ifndef _BLKID_PROBE_H 15 #define _BLKID_PROBE_H 16 17 #include <blkid/blkid_types.h> 18 19 struct blkid_magic; 20 21 #define SB_BUFFER_SIZE 0x11000 22 23 struct blkid_probe { 24 int fd; 25 blkid_cache cache; 26 blkid_dev dev; 27 unsigned char *sbbuf; 28 size_t sb_valid; 29 unsigned char *buf; 30 size_t buf_max; 31 }; 32 33 typedef int (*blkid_probe_t)(struct blkid_probe *probe, 34 struct blkid_magic *id, unsigned char *buf); 35 36 struct blkid_magic { 37 const char *bim_type; /* type name for this magic */ 38 long bim_kboff; /* kilobyte offset of superblock */ 39 unsigned bim_sboff; /* byte offset within superblock */ 40 unsigned bim_len; /* length of magic */ 41 const char *bim_magic; /* magic string */ 42 blkid_probe_t bim_probe; /* probe function */ 43 }; 44 45 /* 46 * Structures for each of the content types we want to extract information 47 * from. We do not necessarily need the magic field here, because we have 48 * already identified the content type before we get this far. It may still 49 * be useful if there are probe functions which handle multiple content types. 50 */ 51 struct ext2_super_block { 52 __u32 s_inodes_count; 53 __u32 s_blocks_count; 54 __u32 s_r_blocks_count; 55 __u32 s_free_blocks_count; 56 __u32 s_free_inodes_count; 57 __u32 s_first_data_block; 58 __u32 s_log_block_size; 59 __u32 s_dummy3[7]; 60 unsigned char s_magic[2]; 61 __u16 s_state; 62 __u32 s_dummy5[8]; 63 __u32 s_feature_compat; 64 __u32 s_feature_incompat; 65 __u32 s_feature_ro_compat; 66 unsigned char s_uuid[16]; 67 char s_volume_name[16]; 68 char s_last_mounted[64]; 69 __u32 s_algorithm_usage_bitmap; 70 __u8 s_prealloc_blocks; 71 __u8 s_prealloc_dir_blocks; 72 __u16 s_reserved_gdt_blocks; 73 __u8 s_journal_uuid[16]; 74 __u32 s_journal_inum; 75 __u32 s_journal_dev; 76 __u32 s_last_orphan; 77 __u32 s_hash_seed[4]; 78 __u8 s_def_hash_version; 79 __u8 s_jnl_backup_type; 80 __u16 s_reserved_word_pad; 81 __u32 s_default_mount_opts; 82 __u32 s_first_meta_bg; 83 __u32 s_mkfs_time; 84 __u32 s_jnl_blocks[17]; 85 __u32 s_blocks_count_hi; 86 __u32 s_r_blocks_count_hi; 87 __u32 s_free_blocks_hi; 88 __u16 s_min_extra_isize; 89 __u16 s_want_extra_isize; 90 __u32 s_flags; 91 __u16 s_raid_stride; 92 __u16 s_mmp_interval; 93 __u64 s_mmp_block; 94 __u32 s_raid_stripe_width; 95 __u32 s_reserved[163]; 96 }; 97 98 /* for s_flags */ 99 #define EXT2_FLAGS_TEST_FILESYS 0x0004 100 101 /* for s_feature_compat */ 102 #define EXT3_FEATURE_COMPAT_HAS_JOURNAL 0x0004 103 104 /* for s_feature_ro_compat */ 105 #define EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER 0x0001 106 #define EXT2_FEATURE_RO_COMPAT_LARGE_FILE 0x0002 107 #define EXT2_FEATURE_RO_COMPAT_BTREE_DIR 0x0004 108 #define EXT4_FEATURE_RO_COMPAT_HUGE_FILE 0x0008 109 #define EXT4_FEATURE_RO_COMPAT_GDT_CSUM 0x0010 110 #define EXT4_FEATURE_RO_COMPAT_DIR_NLINK 0x0020 111 #define EXT4_FEATURE_RO_COMPAT_EXTRA_ISIZE 0x0040 112 113 /* for s_feature_incompat */ 114 #define EXT2_FEATURE_INCOMPAT_FILETYPE 0x0002 115 #define EXT3_FEATURE_INCOMPAT_RECOVER 0x0004 116 #define EXT3_FEATURE_INCOMPAT_JOURNAL_DEV 0x0008 117 #define EXT2_FEATURE_INCOMPAT_META_BG 0x0010 118 #define EXT4_FEATURE_INCOMPAT_EXTENTS 0x0040 /* extents support */ 119 #define EXT4_FEATURE_INCOMPAT_64BIT 0x0080 120 #define EXT4_FEATURE_INCOMPAT_MMP 0x0100 121 #define EXT4_FEATURE_INCOMPAT_FLEX_BG 0x0200 122 123 #define EXT2_FEATURE_RO_COMPAT_SUPP (EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER| \ 124 EXT2_FEATURE_RO_COMPAT_LARGE_FILE| \ 125 EXT2_FEATURE_RO_COMPAT_BTREE_DIR) 126 #define EXT2_FEATURE_INCOMPAT_SUPP (EXT2_FEATURE_INCOMPAT_FILETYPE| \ 127 EXT2_FEATURE_INCOMPAT_META_BG) 128 #define EXT2_FEATURE_INCOMPAT_UNSUPPORTED ~EXT2_FEATURE_INCOMPAT_SUPP 129 #define EXT2_FEATURE_RO_COMPAT_UNSUPPORTED ~EXT2_FEATURE_RO_COMPAT_SUPP 130 131 #define EXT3_FEATURE_RO_COMPAT_SUPP (EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER| \ 132 EXT2_FEATURE_RO_COMPAT_LARGE_FILE| \ 133 EXT2_FEATURE_RO_COMPAT_BTREE_DIR) 134 #define EXT3_FEATURE_INCOMPAT_SUPP (EXT2_FEATURE_INCOMPAT_FILETYPE| \ 135 EXT3_FEATURE_INCOMPAT_RECOVER| \ 136 EXT2_FEATURE_INCOMPAT_META_BG) 137 #define EXT3_FEATURE_INCOMPAT_UNSUPPORTED ~EXT3_FEATURE_INCOMPAT_SUPP 138 #define EXT3_FEATURE_RO_COMPAT_UNSUPPORTED ~EXT3_FEATURE_RO_COMPAT_SUPP 139 140 141 struct xfs_super_block { 142 unsigned char xs_magic[4]; 143 __u32 xs_blocksize; 144 __u64 xs_dblocks; 145 __u64 xs_rblocks; 146 __u32 xs_dummy1[2]; 147 unsigned char xs_uuid[16]; 148 __u32 xs_dummy2[15]; 149 char xs_fname[12]; 150 __u32 xs_dummy3[2]; 151 __u64 xs_icount; 152 __u64 xs_ifree; 153 __u64 xs_fdblocks; 154 }; 155 156 struct reiserfs_super_block { 157 __u32 rs_blocks_count; 158 __u32 rs_free_blocks; 159 __u32 rs_root_block; 160 __u32 rs_journal_block; 161 __u32 rs_journal_dev; 162 __u32 rs_orig_journal_size; 163 __u32 rs_dummy2[5]; 164 __u16 rs_blocksize; 165 __u16 rs_dummy3[3]; 166 unsigned char rs_magic[12]; 167 __u32 rs_dummy4[5]; 168 unsigned char rs_uuid[16]; 169 char rs_label[16]; 170 }; 171 172 struct reiser4_super_block { 173 unsigned char rs4_magic[16]; 174 __u16 rs4_dummy[2]; 175 unsigned char rs4_uuid[16]; 176 unsigned char rs4_label[16]; 177 __u64 rs4_dummy2; 178 }; 179 180 struct jfs_super_block { 181 unsigned char js_magic[4]; 182 __u32 js_version; 183 __u64 js_size; 184 __u32 js_bsize; 185 __u32 js_dummy1; 186 __u32 js_pbsize; 187 __u32 js_dummy2[27]; 188 unsigned char js_uuid[16]; 189 unsigned char js_label[16]; 190 unsigned char js_loguuid[16]; 191 }; 192 193 struct romfs_super_block { 194 unsigned char ros_magic[8]; 195 __u32 ros_dummy1[2]; 196 unsigned char ros_volume[16]; 197 }; 198 199 struct cramfs_super_block { 200 __u8 magic[4]; 201 __u32 size; 202 __u32 flags; 203 __u32 future; 204 __u8 signature[16]; 205 struct cramfs_info { 206 __u32 crc; 207 __u32 edition; 208 __u32 blocks; 209 __u32 files; 210 } info; 211 __u8 name[16]; 212 }; 213 214 struct swap_id_block { 215 /* unsigned char sws_boot[1024]; */ 216 __u32 sws_version; 217 __u32 sws_lastpage; 218 __u32 sws_nrbad; 219 unsigned char sws_uuid[16]; 220 char sws_volume[16]; 221 unsigned char sws_pad[117]; 222 __u32 sws_badpg; 223 }; 224 225 /* Yucky misaligned values */ 226 struct vfat_super_block { 227 /* 00*/ unsigned char vs_ignored[3]; 228 /* 03*/ unsigned char vs_sysid[8]; 229 /* 0b*/ unsigned char vs_sector_size[2]; 230 /* 0d*/ __u8 vs_cluster_size; 231 /* 0e*/ __u16 vs_reserved; 232 /* 10*/ __u8 vs_fats; 233 /* 11*/ unsigned char vs_dir_entries[2]; 234 /* 13*/ unsigned char vs_sectors[2]; 235 /* 15*/ unsigned char vs_media; 236 /* 16*/ __u16 vs_fat_length; 237 /* 18*/ __u16 vs_secs_track; 238 /* 1a*/ __u16 vs_heads; 239 /* 1c*/ __u32 vs_hidden; 240 /* 20*/ __u32 vs_total_sect; 241 /* 24*/ __u32 vs_fat32_length; 242 /* 28*/ __u16 vs_flags; 243 /* 2a*/ __u8 vs_version[2]; 244 /* 2c*/ __u32 vs_root_cluster; 245 /* 30*/ __u16 vs_insfo_sector; 246 /* 32*/ __u16 vs_backup_boot; 247 /* 34*/ __u16 vs_reserved2[6]; 248 /* 40*/ unsigned char vs_unknown[3]; 249 /* 43*/ unsigned char vs_serno[4]; 250 /* 47*/ unsigned char vs_label[11]; 251 /* 52*/ unsigned char vs_magic[8]; 252 /* 5a*/ unsigned char vs_dummy2[164]; 253 /*1fe*/ unsigned char vs_pmagic[2]; 254 }; 255 256 /* Yucky misaligned values */ 257 struct msdos_super_block { 258 /* 00*/ unsigned char ms_ignored[3]; 259 /* 03*/ unsigned char ms_sysid[8]; 260 /* 0b*/ unsigned char ms_sector_size[2]; 261 /* 0d*/ __u8 ms_cluster_size; 262 /* 0e*/ __u16 ms_reserved; 263 /* 10*/ __u8 ms_fats; 264 /* 11*/ unsigned char ms_dir_entries[2]; 265 /* 13*/ unsigned char ms_sectors[2]; 266 /* 15*/ unsigned char ms_media; 267 /* 16*/ __u16 ms_fat_length; 268 /* 18*/ __u16 ms_secs_track; 269 /* 1a*/ __u16 ms_heads; 270 /* 1c*/ __u32 ms_hidden; 271 /* 20*/ __u32 ms_total_sect; 272 /* 24*/ unsigned char ms_unknown[3]; 273 /* 27*/ unsigned char ms_serno[4]; 274 /* 2b*/ unsigned char ms_label[11]; 275 /* 36*/ unsigned char ms_magic[8]; 276 /* 3d*/ unsigned char ms_dummy2[192]; 277 /*1fe*/ unsigned char ms_pmagic[2]; 278 }; 279 280 struct vfat_dir_entry { 281 __u8 name[11]; 282 __u8 attr; 283 __u16 time_creat; 284 __u16 date_creat; 285 __u16 time_acc; 286 __u16 date_acc; 287 __u16 cluster_high; 288 __u16 time_write; 289 __u16 date_write; 290 __u16 cluster_low; 291 __u32 size; 292 }; 293 294 /* maximum number of clusters */ 295 #define FAT12_MAX 0xFF4 296 #define FAT16_MAX 0xFFF4 297 #define FAT32_MAX 0x0FFFFFF6 298 299 struct minix_super_block { 300 __u16 ms_ninodes; 301 __u16 ms_nzones; 302 __u16 ms_imap_blocks; 303 __u16 ms_zmap_blocks; 304 __u16 ms_firstdatazone; 305 __u16 ms_log_zone_size; 306 __u32 ms_max_size; 307 unsigned char ms_magic[2]; 308 __u16 ms_state; 309 __u32 ms_zones; 310 }; 311 312 struct mdp_superblock_s { 313 __u32 md_magic; 314 __u32 major_version; 315 __u32 minor_version; 316 __u32 patch_version; 317 __u32 gvalid_words; 318 __u32 set_uuid0; 319 __u32 ctime; 320 __u32 level; 321 __u32 size; 322 __u32 nr_disks; 323 __u32 raid_disks; 324 __u32 md_minor; 325 __u32 not_persistent; 326 __u32 set_uuid1; 327 __u32 set_uuid2; 328 __u32 set_uuid3; 329 }; 330 331 struct hfs_super_block { 332 char h_magic[2]; 333 char h_dummy[18]; 334 __u32 h_blksize; 335 }; 336 337 struct ocfs_volume_header { 338 unsigned char minor_version[4]; 339 unsigned char major_version[4]; 340 unsigned char signature[128]; 341 char mount[128]; 342 unsigned char mount_len[2]; 343 }; 344 345 struct ocfs_volume_label { 346 unsigned char disk_lock[48]; 347 char label[64]; 348 unsigned char label_len[2]; 349 unsigned char vol_id[16]; 350 unsigned char vol_id_len[2]; 351 }; 352 353 #define ocfsmajor(o) ((__u32)o.major_version[0] \ 354 + (((__u32) o.major_version[1]) << 8) \ 355 + (((__u32) o.major_version[2]) << 16) \ 356 + (((__u32) o.major_version[3]) << 24)) 357 #define ocfslabellen(o) ((__u32)o.label_len[0] + (((__u32) o.label_len[1]) << 8)) 358 #define ocfsmountlen(o) ((__u32)o.mount_len[0] + (((__u32) o.mount_len[1])<<8)) 359 360 #define OCFS_MAGIC "OracleCFS" 361 362 struct ocfs2_super_block { 363 unsigned char signature[8]; 364 unsigned char s_dummy1[184]; 365 unsigned char s_dummy2[80]; 366 char s_label[64]; 367 unsigned char s_uuid[16]; 368 }; 369 370 #define OCFS2_MIN_BLOCKSIZE 512 371 #define OCFS2_MAX_BLOCKSIZE 4096 372 373 #define OCFS2_SUPER_BLOCK_BLKNO 2 374 375 #define OCFS2_SUPER_BLOCK_SIGNATURE "OCFSV2" 376 377 struct oracle_asm_disk_label { 378 char dummy[32]; 379 char dl_tag[8]; 380 char dl_id[24]; 381 }; 382 383 #define ORACLE_ASM_DISK_LABEL_MARKED "ORCLDISK" 384 #define ORACLE_ASM_DISK_LABEL_OFFSET 32 385 386 struct iso_volume_descriptor { 387 unsigned char vd_type; 388 unsigned char vd_id[5]; 389 unsigned char vd_version; 390 unsigned char flags; 391 unsigned char system_id[32]; 392 unsigned char volume_id[32]; 393 unsigned char unused[8]; 394 unsigned char space_size[8]; 395 unsigned char escape_sequences[8]; 396 }; 397 398 /* Common gfs/gfs2 constants: */ 399 #define GFS_MAGIC 0x01161970 400 #define GFS_DEFAULT_BSIZE 4096 401 #define GFS_SUPERBLOCK_OFFSET (0x10 * GFS_DEFAULT_BSIZE) 402 #define GFS_METATYPE_SB 1 403 #define GFS_FORMAT_SB 100 404 #define GFS_LOCKNAME_LEN 64 405 406 /* gfs1 constants: */ 407 #define GFS_FORMAT_FS 1309 408 #define GFS_FORMAT_MULTI 1401 409 /* gfs2 constants: */ 410 #define GFS2_FORMAT_FS 1801 411 #define GFS2_FORMAT_MULTI 1900 412 413 struct gfs2_meta_header { 414 __u32 mh_magic; 415 __u32 mh_type; 416 __u64 __pad0; /* Was generation number in gfs1 */ 417 __u32 mh_format; 418 __u32 __pad1; /* Was incarnation number in gfs1 */ 419 }; 420 421 struct gfs2_inum { 422 __u64 no_formal_ino; 423 __u64 no_addr; 424 }; 425 426 struct gfs2_sb { 427 struct gfs2_meta_header sb_header; 428 429 __u32 sb_fs_format; 430 __u32 sb_multihost_format; 431 __u32 __pad0; /* Was superblock flags in gfs1 */ 432 433 __u32 sb_bsize; 434 __u32 sb_bsize_shift; 435 __u32 __pad1; /* Was journal segment size in gfs1 */ 436 437 struct gfs2_inum sb_master_dir; /* Was jindex dinode in gfs1 */ 438 struct gfs2_inum __pad2; /* Was rindex dinode in gfs1 */ 439 struct gfs2_inum sb_root_dir; 440 441 char sb_lockproto[GFS_LOCKNAME_LEN]; 442 char sb_locktable[GFS_LOCKNAME_LEN]; 443 /* In gfs1, quota and license dinodes followed */ 444 }; 445 446 struct ntfs_super_block { 447 __u8 jump[3]; 448 __u8 oem_id[8]; 449 __u8 bios_parameter_block[25]; 450 __u16 unused[2]; 451 __u64 number_of_sectors; 452 __u64 mft_cluster_location; 453 __u64 mft_mirror_cluster_location; 454 __s8 cluster_per_mft_record; 455 __u8 reserved1[3]; 456 __s8 cluster_per_index_record; 457 __u8 reserved2[3]; 458 __u64 volume_serial; 459 __u16 checksum; 460 }; 461 462 struct master_file_table_record { 463 __u32 magic; 464 __u16 usa_ofs; 465 __u16 usa_count; 466 __u64 lsn; 467 __u16 sequence_number; 468 __u16 link_count; 469 __u16 attrs_offset; 470 __u16 flags; 471 __u32 bytes_in_use; 472 __u32 bytes_allocated; 473 } __attribute__((__packed__)); 474 475 struct file_attribute { 476 __u32 type; 477 __u32 len; 478 __u8 non_resident; 479 __u8 name_len; 480 __u16 name_offset; 481 __u16 flags; 482 __u16 instance; 483 __u32 value_len; 484 __u16 value_offset; 485 } __attribute__((__packed__)); 486 487 #define MFT_RECORD_VOLUME 3 488 #define MFT_RECORD_ATTR_VOLUME_NAME 0x60 489 #define MFT_RECORD_ATTR_VOLUME_INFO 0x70 490 #define MFT_RECORD_ATTR_OBJECT_ID 0x40 491 #define MFT_RECORD_ATTR_END 0xffffffffu 492 493 /* HFS / HFS+ */ 494 struct hfs_finder_info { 495 __u32 boot_folder; 496 __u32 start_app; 497 __u32 open_folder; 498 __u32 os9_folder; 499 __u32 reserved; 500 __u32 osx_folder; 501 __u8 id[8]; 502 } __attribute__((packed)); 503 504 struct hfs_mdb { 505 __u8 signature[2]; 506 __u32 cr_date; 507 __u32 ls_Mod; 508 __u16 atrb; 509 __u16 nm_fls; 510 __u16 vbm_st; 511 __u16 alloc_ptr; 512 __u16 nm_al_blks; 513 __u32 al_blk_size; 514 __u32 clp_size; 515 __u16 al_bl_st; 516 __u32 nxt_cnid; 517 __u16 free_bks; 518 __u8 label_len; 519 __u8 label[27]; 520 __u32 vol_bkup; 521 __u16 vol_seq_num; 522 __u32 wr_cnt; 523 __u32 xt_clump_size; 524 __u32 ct_clump_size; 525 __u16 num_root_dirs; 526 __u32 file_count; 527 __u32 dir_count; 528 struct hfs_finder_info finder_info; 529 __u8 embed_sig[2]; 530 __u16 embed_startblock; 531 __u16 embed_blockcount; 532 } __attribute__((packed)); 533 534 /* this is lvm's label_header & pv_header combined. */ 535 536 #define LVM2_ID_LEN 32 537 538 struct lvm2_pv_label_header { 539 /* label_header */ 540 __u8 id[8]; /* LABELONE */ 541 __u64 sector_xl; /* Sector number of this label */ 542 __u32 crc_xl; /* From next field to end of sector */ 543 __u32 offset_xl; /* Offset from start of struct to contents */ 544 __u8 type[8]; /* LVM2 001 */ 545 /* pv_header */ 546 __u8 pv_uuid[LVM2_ID_LEN]; 547 } __attribute__ ((packed)); 548 549 /* 550 * Byte swap functions 551 */ 552 #ifdef __GNUC__ 553 #define _INLINE_ static __inline__ 554 #else /* For Watcom C */ 555 #define _INLINE_ static inline 556 #endif 557 558 static __u16 blkid_swab16(__u16 val); 559 static __u32 blkid_swab32(__u32 val); 560 static __u64 blkid_swab64(__u64 val); 561 562 #if ((defined __GNUC__) && \ 563 (defined(__i386__) || defined(__i486__) || defined(__i586__))) 564 565 #define _BLKID_HAVE_ASM_BITOPS_ 566 567 _INLINE_ __u32 blkid_swab32(__u32 val) 568 { 569 #ifdef EXT2FS_REQUIRE_486 570 __asm__("bswap %0" : "=r" (val) : "0" (val)); 571 #else 572 __asm__("xchgb %b0,%h0\n\t" /* swap lower bytes */ 573 "rorl $16,%0\n\t" /* swap words */ 574 "xchgb %b0,%h0" /* swap higher bytes */ 575 :"=q" (val) 576 : "0" (val)); 577 #endif 578 return val; 579 } 580 581 _INLINE_ __u16 blkid_swab16(__u16 val) 582 { 583 __asm__("xchgb %b0,%h0" /* swap bytes */ \ 584 : "=q" (val) \ 585 : "0" (val)); \ 586 return val; 587 } 588 589 _INLINE_ __u64 blkid_swab64(__u64 val) 590 { 591 return (blkid_swab32(val >> 32) | 592 (((__u64) blkid_swab32(val & 0xFFFFFFFFUL)) << 32)); 593 } 594 #endif 595 596 #if !defined(_BLKID_HAVE_ASM_BITOPS_) 597 598 _INLINE_ __u16 blkid_swab16(__u16 val) 599 { 600 return (val >> 8) | (val << 8); 601 } 602 603 _INLINE_ __u32 blkid_swab32(__u32 val) 604 { 605 return ((val>>24) | ((val>>8)&0xFF00) | 606 ((val<<8)&0xFF0000) | (val<<24)); 607 } 608 609 _INLINE_ __u64 blkid_swab64(__u64 val) 610 { 611 return (blkid_swab32(val >> 32) | 612 (((__u64) blkid_swab32(val & 0xFFFFFFFFUL)) << 32)); 613 } 614 #endif 615 616 617 618 #ifdef WORDS_BIGENDIAN 619 #define blkid_le16(x) blkid_swab16(x) 620 #define blkid_le32(x) blkid_swab32(x) 621 #define blkid_le64(x) blkid_swab64(x) 622 #define blkid_be16(x) (x) 623 #define blkid_be32(x) (x) 624 #define blkid_be64(x) (x) 625 #else 626 #define blkid_le16(x) (x) 627 #define blkid_le32(x) (x) 628 #define blkid_le64(x) (x) 629 #define blkid_be16(x) blkid_swab16(x) 630 #define blkid_be32(x) blkid_swab32(x) 631 #define blkid_be64(x) blkid_swab64(x) 632 #endif 633 634 #undef _INLINE_ 635 636 #endif /* _BLKID_PROBE_H */ 637
