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
blkid_swab32(__u32 val)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
blkid_swab16(__u16 val)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
blkid_swab64(__u64 val)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
blkid_swab16(__u16 val)598 _INLINE_ __u16 blkid_swab16(__u16 val)
599 {
600 return (val >> 8) | (val << 8);
601 }
602
blkid_swab32(__u32 val)603 _INLINE_ __u32 blkid_swab32(__u32 val)
604 {
605 return ((val>>24) | ((val>>8)&0xFF00) |
606 ((val<<8)&0xFF0000) | (val<<24));
607 }
608
blkid_swab64(__u64 val)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