gpt.c revision 1.2
1 /*- 2 * Copyright (c) 2002 Marcel Moolenaar 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 25 * 26 * CRC32 code derived from work by Gary S. Brown. 27 */ 28 29 #include <sys/cdefs.h> 30 #ifdef __FBSDID 31 __FBSDID("$FreeBSD: src/sbin/gpt/gpt.c,v 1.16 2006/07/07 02:44:23 marcel Exp $"); 32 #endif 33 #ifdef __RCSID 34 __RCSID("$NetBSD: gpt.c,v 1.2 2006/10/15 22:36:29 christos Exp $"); 35 #endif 36 37 #include <sys/param.h> 38 #include <sys/types.h> 39 #include <sys/disk.h> 40 #include <sys/stat.h> 41 #include <sys/ioctl.h> 42 43 #include <err.h> 44 #include <errno.h> 45 #include <fcntl.h> 46 #include <paths.h> 47 #include <stddef.h> 48 #include <stdio.h> 49 #include <stdlib.h> 50 #include <string.h> 51 #include <unistd.h> 52 #ifdef __NetBSD__ 53 #include <util.h> 54 #include <ctype.h> 55 #include <prop/proplib.h> 56 #include <sys/drvctlio.h> 57 #endif 58 59 #include "map.h" 60 #include "gpt.h" 61 62 char device_path[MAXPATHLEN]; 63 char *device_name; 64 65 off_t mediasz; 66 67 u_int parts; 68 u_int secsz; 69 70 int readonly, verbose; 71 72 static uint32_t crc32_tab[] = { 73 0x00000000, 0x77073096, 0xee0e612c, 0x990951ba, 0x076dc419, 0x706af48f, 74 0xe963a535, 0x9e6495a3, 0x0edb8832, 0x79dcb8a4, 0xe0d5e91e, 0x97d2d988, 75 0x09b64c2b, 0x7eb17cbd, 0xe7b82d07, 0x90bf1d91, 0x1db71064, 0x6ab020f2, 76 0xf3b97148, 0x84be41de, 0x1adad47d, 0x6ddde4eb, 0xf4d4b551, 0x83d385c7, 77 0x136c9856, 0x646ba8c0, 0xfd62f97a, 0x8a65c9ec, 0x14015c4f, 0x63066cd9, 78 0xfa0f3d63, 0x8d080df5, 0x3b6e20c8, 0x4c69105e, 0xd56041e4, 0xa2677172, 79 0x3c03e4d1, 0x4b04d447, 0xd20d85fd, 0xa50ab56b, 0x35b5a8fa, 0x42b2986c, 80 0xdbbbc9d6, 0xacbcf940, 0x32d86ce3, 0x45df5c75, 0xdcd60dcf, 0xabd13d59, 81 0x26d930ac, 0x51de003a, 0xc8d75180, 0xbfd06116, 0x21b4f4b5, 0x56b3c423, 82 0xcfba9599, 0xb8bda50f, 0x2802b89e, 0x5f058808, 0xc60cd9b2, 0xb10be924, 83 0x2f6f7c87, 0x58684c11, 0xc1611dab, 0xb6662d3d, 0x76dc4190, 0x01db7106, 84 0x98d220bc, 0xefd5102a, 0x71b18589, 0x06b6b51f, 0x9fbfe4a5, 0xe8b8d433, 85 0x7807c9a2, 0x0f00f934, 0x9609a88e, 0xe10e9818, 0x7f6a0dbb, 0x086d3d2d, 86 0x91646c97, 0xe6635c01, 0x6b6b51f4, 0x1c6c6162, 0x856530d8, 0xf262004e, 87 0x6c0695ed, 0x1b01a57b, 0x8208f4c1, 0xf50fc457, 0x65b0d9c6, 0x12b7e950, 88 0x8bbeb8ea, 0xfcb9887c, 0x62dd1ddf, 0x15da2d49, 0x8cd37cf3, 0xfbd44c65, 89 0x4db26158, 0x3ab551ce, 0xa3bc0074, 0xd4bb30e2, 0x4adfa541, 0x3dd895d7, 90 0xa4d1c46d, 0xd3d6f4fb, 0x4369e96a, 0x346ed9fc, 0xad678846, 0xda60b8d0, 91 0x44042d73, 0x33031de5, 0xaa0a4c5f, 0xdd0d7cc9, 0x5005713c, 0x270241aa, 92 0xbe0b1010, 0xc90c2086, 0x5768b525, 0x206f85b3, 0xb966d409, 0xce61e49f, 93 0x5edef90e, 0x29d9c998, 0xb0d09822, 0xc7d7a8b4, 0x59b33d17, 0x2eb40d81, 94 0xb7bd5c3b, 0xc0ba6cad, 0xedb88320, 0x9abfb3b6, 0x03b6e20c, 0x74b1d29a, 95 0xead54739, 0x9dd277af, 0x04db2615, 0x73dc1683, 0xe3630b12, 0x94643b84, 96 0x0d6d6a3e, 0x7a6a5aa8, 0xe40ecf0b, 0x9309ff9d, 0x0a00ae27, 0x7d079eb1, 97 0xf00f9344, 0x8708a3d2, 0x1e01f268, 0x6906c2fe, 0xf762575d, 0x806567cb, 98 0x196c3671, 0x6e6b06e7, 0xfed41b76, 0x89d32be0, 0x10da7a5a, 0x67dd4acc, 99 0xf9b9df6f, 0x8ebeeff9, 0x17b7be43, 0x60b08ed5, 0xd6d6a3e8, 0xa1d1937e, 100 0x38d8c2c4, 0x4fdff252, 0xd1bb67f1, 0xa6bc5767, 0x3fb506dd, 0x48b2364b, 101 0xd80d2bda, 0xaf0a1b4c, 0x36034af6, 0x41047a60, 0xdf60efc3, 0xa867df55, 102 0x316e8eef, 0x4669be79, 0xcb61b38c, 0xbc66831a, 0x256fd2a0, 0x5268e236, 103 0xcc0c7795, 0xbb0b4703, 0x220216b9, 0x5505262f, 0xc5ba3bbe, 0xb2bd0b28, 104 0x2bb45a92, 0x5cb36a04, 0xc2d7ffa7, 0xb5d0cf31, 0x2cd99e8b, 0x5bdeae1d, 105 0x9b64c2b0, 0xec63f226, 0x756aa39c, 0x026d930a, 0x9c0906a9, 0xeb0e363f, 106 0x72076785, 0x05005713, 0x95bf4a82, 0xe2b87a14, 0x7bb12bae, 0x0cb61b38, 107 0x92d28e9b, 0xe5d5be0d, 0x7cdcefb7, 0x0bdbdf21, 0x86d3d2d4, 0xf1d4e242, 108 0x68ddb3f8, 0x1fda836e, 0x81be16cd, 0xf6b9265b, 0x6fb077e1, 0x18b74777, 109 0x88085ae6, 0xff0f6a70, 0x66063bca, 0x11010b5c, 0x8f659eff, 0xf862ae69, 110 0x616bffd3, 0x166ccf45, 0xa00ae278, 0xd70dd2ee, 0x4e048354, 0x3903b3c2, 111 0xa7672661, 0xd06016f7, 0x4969474d, 0x3e6e77db, 0xaed16a4a, 0xd9d65adc, 112 0x40df0b66, 0x37d83bf0, 0xa9bcae53, 0xdebb9ec5, 0x47b2cf7f, 0x30b5ffe9, 113 0xbdbdf21c, 0xcabac28a, 0x53b39330, 0x24b4a3a6, 0xbad03605, 0xcdd70693, 114 0x54de5729, 0x23d967bf, 0xb3667a2e, 0xc4614ab8, 0x5d681b02, 0x2a6f2b94, 115 0xb40bbe37, 0xc30c8ea1, 0x5a05df1b, 0x2d02ef8d 116 }; 117 118 uint32_t 119 crc32(const void *buf, size_t size) 120 { 121 const uint8_t *p; 122 uint32_t crc; 123 124 p = buf; 125 crc = ~0U; 126 127 while (size--) 128 crc = crc32_tab[(crc ^ *p++) & 0xFF] ^ (crc >> 8); 129 130 return crc ^ ~0U; 131 } 132 133 uint8_t * 134 utf16_to_utf8(uint16_t *s16) 135 { 136 static uint8_t *s8 = NULL; 137 static size_t s8len = 0; 138 size_t s8idx, s16idx, s16len; 139 uint32_t utfchar; 140 unsigned int c; 141 142 s16len = 0; 143 while (s16[s16len++] != 0) 144 ; 145 if (s8len < s16len * 3) { 146 if (s8 != NULL) 147 free(s8); 148 s8len = s16len * 3; 149 s8 = calloc(s16len, 3); 150 } 151 s8idx = s16idx = 0; 152 while (s16idx < s16len) { 153 utfchar = le16toh(s16[s16idx++]); 154 if ((utfchar & 0xf800) == 0xd800) { 155 c = le16toh(s16[s16idx]); 156 if ((utfchar & 0x400) != 0 || (c & 0xfc00) != 0xdc00) 157 utfchar = 0xfffd; 158 else 159 s16idx++; 160 } 161 if (utfchar < 0x80) { 162 s8[s8idx++] = utfchar; 163 } else if (utfchar < 0x800) { 164 s8[s8idx++] = 0xc0 | (utfchar >> 6); 165 s8[s8idx++] = 0x80 | (utfchar & 0x3f); 166 } else if (utfchar < 0x10000) { 167 s8[s8idx++] = 0xe0 | (utfchar >> 12); 168 s8[s8idx++] = 0x80 | ((utfchar >> 6) & 0x3f); 169 s8[s8idx++] = 0x80 | (utfchar & 0x3f); 170 } else if (utfchar < 0x200000) { 171 s8[s8idx++] = 0xf0 | (utfchar >> 18); 172 s8[s8idx++] = 0x80 | ((utfchar >> 12) & 0x3f); 173 s8[s8idx++] = 0x80 | ((utfchar >> 6) & 0x3f); 174 s8[s8idx++] = 0x80 | (utfchar & 0x3f); 175 } 176 } 177 return (s8); 178 } 179 180 void 181 utf8_to_utf16(const uint8_t *s8, uint16_t *s16, size_t s16len) 182 { 183 size_t s16idx, s8idx, s8len; 184 uint32_t utfchar = 0; 185 unsigned int c, utfbytes; 186 187 s8len = 0; 188 while (s8[s8len++] != 0) 189 ; 190 s8idx = s16idx = 0; 191 utfbytes = 0; 192 do { 193 c = s8[s8idx++]; 194 if ((c & 0xc0) != 0x80) { 195 /* Initial characters. */ 196 if (utfbytes != 0) { 197 /* Incomplete encoding. */ 198 s16[s16idx++] = 0xfffd; 199 if (s16idx == s16len) { 200 s16[--s16idx] = 0; 201 return; 202 } 203 } 204 if ((c & 0xf8) == 0xf0) { 205 utfchar = c & 0x07; 206 utfbytes = 3; 207 } else if ((c & 0xf0) == 0xe0) { 208 utfchar = c & 0x0f; 209 utfbytes = 2; 210 } else if ((c & 0xe0) == 0xc0) { 211 utfchar = c & 0x1f; 212 utfbytes = 1; 213 } else { 214 utfchar = c & 0x7f; 215 utfbytes = 0; 216 } 217 } else { 218 /* Followup characters. */ 219 if (utfbytes > 0) { 220 utfchar = (utfchar << 6) + (c & 0x3f); 221 utfbytes--; 222 } else if (utfbytes == 0) 223 utfbytes = -1; 224 } 225 if (utfbytes == 0) { 226 if (utfchar >= 0x10000 && s16idx + 2 >= s16len) 227 utfchar = 0xfffd; 228 if (utfchar >= 0x10000) { 229 s16[s16idx++] = 0xd800 | ((utfchar>>10)-0x40); 230 s16[s16idx++] = 0xdc00 | (utfchar & 0x3ff); 231 } else 232 s16[s16idx++] = utfchar; 233 if (s16idx == s16len) { 234 s16[--s16idx] = 0; 235 return; 236 } 237 } 238 } while (c != 0); 239 } 240 241 void 242 le_uuid_dec(void const *buf, uuid_t *uuid) 243 { 244 u_char const *p; 245 int i; 246 247 p = buf; 248 uuid->time_low = le32dec(p); 249 uuid->time_mid = le16dec(p + 4); 250 uuid->time_hi_and_version = le16dec(p + 6); 251 uuid->clock_seq_hi_and_reserved = p[8]; 252 uuid->clock_seq_low = p[9]; 253 for (i = 0; i < _UUID_NODE_LEN; i++) 254 uuid->node[i] = p[10 + i]; 255 } 256 257 void 258 le_uuid_enc(void *buf, uuid_t const *uuid) 259 { 260 u_char *p; 261 int i; 262 263 p = buf; 264 le32enc(p, uuid->time_low); 265 le16enc(p + 4, uuid->time_mid); 266 le16enc(p + 6, uuid->time_hi_and_version); 267 p[8] = uuid->clock_seq_hi_and_reserved; 268 p[9] = uuid->clock_seq_low; 269 for (i = 0; i < _UUID_NODE_LEN; i++) 270 p[10 + i] = uuid->node[i]; 271 } 272 273 int 274 parse_uuid(const char *s, uuid_t *uuid) 275 { 276 uint32_t status; 277 278 uuid_from_string(s, uuid, &status); 279 if (status == uuid_s_ok) 280 return (0); 281 282 switch (*s) { 283 case 'e': 284 if (strcmp(s, "efi") == 0) { 285 uuid_t efi = GPT_ENT_TYPE_EFI; 286 *uuid = efi; 287 return (0); 288 } 289 break; 290 case 'h': 291 if (strcmp(s, "hfs") == 0) { 292 uuid_t hfs = GPT_ENT_TYPE_APPLE_HFS; 293 *uuid = hfs; 294 return (0); 295 } 296 break; 297 case 'l': 298 if (strcmp(s, "linux") == 0) { 299 uuid_t lnx = GPT_ENT_TYPE_MS_BASIC_DATA; 300 *uuid = lnx; 301 return (0); 302 } 303 break; 304 case 's': 305 if (strcmp(s, "swap") == 0) { 306 uuid_t sw = GPT_ENT_TYPE_FREEBSD_SWAP; 307 *uuid = sw; 308 return (0); 309 } 310 break; 311 case 'u': 312 if (strcmp(s, "ufs") == 0) { 313 uuid_t ufs = GPT_ENT_TYPE_FREEBSD_UFS; 314 *uuid = ufs; 315 return (0); 316 } 317 break; 318 case 'w': 319 if (strcmp(s, "windows") == 0) { 320 uuid_t win = GPT_ENT_TYPE_MS_BASIC_DATA; 321 *uuid = win; 322 return (0); 323 } 324 break; 325 } 326 return (EINVAL); 327 } 328 329 void* 330 gpt_read(int fd, off_t lba, size_t count) 331 { 332 off_t ofs; 333 void *buf; 334 335 count *= secsz; 336 buf = malloc(count); 337 if (buf == NULL) 338 return (NULL); 339 340 ofs = lba * secsz; 341 if (lseek(fd, ofs, SEEK_SET) == ofs && 342 read(fd, buf, count) == (ssize_t)count) 343 return (buf); 344 345 free(buf); 346 return (NULL); 347 } 348 349 int 350 gpt_write(int fd, map_t *map) 351 { 352 off_t ofs; 353 size_t count; 354 355 count = map->map_size * secsz; 356 ofs = map->map_start * secsz; 357 if (lseek(fd, ofs, SEEK_SET) == ofs && 358 write(fd, map->map_data, count) == (ssize_t)count) 359 return (0); 360 return (-1); 361 } 362 363 static int 364 gpt_mbr(int fd, off_t lba) 365 { 366 struct mbr *mbr; 367 map_t *m, *p; 368 off_t size, start; 369 unsigned int i, pmbr; 370 371 mbr = gpt_read(fd, lba, 1); 372 if (mbr == NULL) 373 return (-1); 374 375 if (mbr->mbr_sig != htole16(MBR_SIG)) { 376 if (verbose) 377 warnx("%s: MBR not found at sector %llu", device_name, 378 (long long)lba); 379 free(mbr); 380 return (0); 381 } 382 383 /* 384 * Differentiate between a regular MBR and a PMBR. This is more 385 * convenient in general. A PMBR is one with a single partition 386 * of type 0xee. 387 */ 388 pmbr = 0; 389 for (i = 0; i < 4; i++) { 390 if (mbr->mbr_part[i].part_typ == 0) 391 continue; 392 if (mbr->mbr_part[i].part_typ == 0xee) 393 pmbr++; 394 else 395 break; 396 } 397 if (pmbr && i == 4 && lba == 0) { 398 if (pmbr != 1) 399 warnx("%s: Suspicious PMBR at sector %llu", 400 device_name, (long long)lba); 401 else if (verbose > 1) 402 warnx("%s: PMBR at sector %llu", device_name, 403 (long long)lba); 404 p = map_add(lba, 1LL, MAP_TYPE_PMBR, mbr); 405 return ((p == NULL) ? -1 : 0); 406 } 407 if (pmbr) 408 warnx("%s: Suspicious MBR at sector %llu", device_name, 409 (long long)lba); 410 else if (verbose > 1) 411 warnx("%s: MBR at sector %llu", device_name, (long long)lba); 412 413 p = map_add(lba, 1LL, MAP_TYPE_MBR, mbr); 414 if (p == NULL) 415 return (-1); 416 for (i = 0; i < 4; i++) { 417 if (mbr->mbr_part[i].part_typ == 0 || 418 mbr->mbr_part[i].part_typ == 0xee) 419 continue; 420 start = le16toh(mbr->mbr_part[i].part_start_hi); 421 start = (start << 16) + le16toh(mbr->mbr_part[i].part_start_lo); 422 size = le16toh(mbr->mbr_part[i].part_size_hi); 423 size = (size << 16) + le16toh(mbr->mbr_part[i].part_size_lo); 424 if (start == 0 && size == 0) { 425 warnx("%s: Malformed MBR at sector %llu", device_name, 426 (long long)lba); 427 continue; 428 } 429 /* start is relative to the offset of the MBR itself. */ 430 start += lba; 431 if (verbose > 2) 432 warnx("%s: MBR part: type=%d, start=%llu, size=%llu", 433 device_name, mbr->mbr_part[i].part_typ, 434 (long long)start, (long long)size); 435 if (mbr->mbr_part[i].part_typ != 15) { 436 m = map_add(start, size, MAP_TYPE_MBR_PART, p); 437 if (m == NULL) 438 return (-1); 439 m->map_index = i + 1; 440 } else { 441 if (gpt_mbr(fd, start) == -1) 442 return (-1); 443 } 444 } 445 return (0); 446 } 447 448 #ifdef __NetBSD__ 449 static int 450 drvctl(const char *name, u_int *sector_size, off_t *media_size) 451 { 452 prop_dictionary_t command_dict, args_dict, results_dict, data_dict, 453 disk_info, geometry; 454 prop_string_t string; 455 prop_number_t number; 456 int dfd, res; 457 char *dname, *p; 458 459 if ((dfd = open("/dev/drvctl", O_RDONLY)) == -1) 460 return -1; 461 462 command_dict = prop_dictionary_create(); 463 args_dict = prop_dictionary_create(); 464 465 string = prop_string_create_cstring_nocopy("get-properties"); 466 prop_dictionary_set(command_dict, "drvctl-command", string); 467 prop_object_release(string); 468 469 if ((dname = strdup(name[0] == 'r' ? name + 1 : name)) == NULL) { 470 (void)close(dfd); 471 return -1; 472 } 473 for (p = dname; *p; p++) 474 continue; 475 for (--p; p >= dname && !isdigit((unsigned char)*p); *p-- = '\0') 476 continue; 477 478 string = prop_string_create_cstring(dname); 479 free(dname); 480 prop_dictionary_set(args_dict, "device-name", string); 481 prop_object_release(string); 482 483 prop_dictionary_set(command_dict, "drvctl-arguments", args_dict); 484 prop_object_release(args_dict); 485 486 res = prop_dictionary_sendrecv_ioctl(command_dict, dfd, DRVCTLCOMMAND, 487 &results_dict); 488 (void)close(dfd); 489 prop_object_release(command_dict); 490 if (res) { 491 errno = res; 492 return -1; 493 } 494 495 number = prop_dictionary_get(results_dict, "drvctl-error"); 496 if ((errno = prop_number_integer_value(number)) != 0) 497 return -1; 498 499 data_dict = prop_dictionary_get(results_dict, "drvctl-result-data"); 500 if (data_dict == NULL) 501 goto out; 502 503 disk_info = prop_dictionary_get(data_dict, "disk-info"); 504 if (disk_info == NULL) 505 goto out; 506 507 geometry = prop_dictionary_get(disk_info, "geometry"); 508 if (geometry == NULL) 509 goto out; 510 511 number = prop_dictionary_get(geometry, "sector-size"); 512 if (number == NULL) 513 goto out; 514 515 *sector_size = prop_number_integer_value(number); 516 517 number = prop_dictionary_get(geometry, "sectors-per-unit"); 518 if (number == NULL) 519 goto out; 520 521 *media_size = prop_number_integer_value(number) * *sector_size; 522 523 return 0; 524 out: 525 errno = EINVAL; 526 return -1; 527 } 528 #endif 529 530 static int 531 gpt_gpt(int fd, off_t lba) 532 { 533 uuid_t type; 534 off_t size; 535 struct gpt_ent *ent; 536 struct gpt_hdr *hdr; 537 char *p, *s; 538 map_t *m; 539 size_t blocks, tblsz; 540 unsigned int i; 541 uint32_t crc; 542 543 hdr = gpt_read(fd, lba, 1); 544 if (hdr == NULL) 545 return (-1); 546 547 if (memcmp(hdr->hdr_sig, GPT_HDR_SIG, sizeof(hdr->hdr_sig))) 548 goto fail_hdr; 549 550 crc = le32toh(hdr->hdr_crc_self); 551 hdr->hdr_crc_self = 0; 552 if (crc32(hdr, le32toh(hdr->hdr_size)) != crc) { 553 if (verbose) 554 warnx("%s: Bad CRC in GPT header at sector %llu", 555 device_name, (long long)lba); 556 goto fail_hdr; 557 } 558 559 tblsz = le32toh(hdr->hdr_entries) * le32toh(hdr->hdr_entsz); 560 blocks = tblsz / secsz + ((tblsz % secsz) ? 1 : 0); 561 562 /* Use generic pointer to deal with hdr->hdr_entsz != sizeof(*ent). */ 563 p = gpt_read(fd, le64toh(hdr->hdr_lba_table), blocks); 564 if (p == NULL) 565 return (-1); 566 567 if (crc32(p, tblsz) != le32toh(hdr->hdr_crc_table)) { 568 if (verbose) 569 warnx("%s: Bad CRC in GPT table at sector %llu", 570 device_name, 571 (long long)le64toh(hdr->hdr_lba_table)); 572 goto fail_ent; 573 } 574 575 if (verbose > 1) 576 warnx("%s: %s GPT at sector %llu", device_name, 577 (lba == 1) ? "Pri" : "Sec", (long long)lba); 578 579 m = map_add(lba, 1, (lba == 1) 580 ? MAP_TYPE_PRI_GPT_HDR : MAP_TYPE_SEC_GPT_HDR, hdr); 581 if (m == NULL) 582 return (-1); 583 584 m = map_add(le64toh(hdr->hdr_lba_table), blocks, (lba == 1) 585 ? MAP_TYPE_PRI_GPT_TBL : MAP_TYPE_SEC_GPT_TBL, p); 586 if (m == NULL) 587 return (-1); 588 589 if (lba != 1) 590 return (0); 591 592 for (i = 0; i < le32toh(hdr->hdr_entries); i++) { 593 ent = (void*)(p + i * le32toh(hdr->hdr_entsz)); 594 if (uuid_is_nil((uuid_t *)&ent->ent_type, NULL)) 595 continue; 596 597 size = le64toh(ent->ent_lba_end) - le64toh(ent->ent_lba_start) + 598 1LL; 599 if (verbose > 2) { 600 le_uuid_dec(&ent->ent_type, &type); 601 uuid_to_string(&type, &s, NULL); 602 warnx( 603 "%s: GPT partition: type=%s, start=%llu, size=%llu", device_name, s, 604 (long long)le64toh(ent->ent_lba_start), 605 (long long)size); 606 free(s); 607 } 608 m = map_add(le64toh(ent->ent_lba_start), size, 609 MAP_TYPE_GPT_PART, ent); 610 if (m == NULL) 611 return (-1); 612 m->map_index = i + 1; 613 } 614 return (0); 615 616 fail_ent: 617 free(p); 618 619 fail_hdr: 620 free(hdr); 621 return (0); 622 } 623 624 int 625 gpt_open(const char *dev) 626 { 627 struct stat sb; 628 int fd, mode; 629 630 mode = readonly ? O_RDONLY : O_RDWR|O_EXCL; 631 632 device_name = device_path; 633 #ifdef __FreeBSD__ 634 strlcpy(device_path, dev, sizeof(device_path)); 635 if ((fd = open(device_path, mode)) != -1) 636 goto found; 637 638 snprintf(device_path, sizeof(device_path), "%s%s", _PATH_DEV, dev); 639 device_name = device_path + strlen(_PATH_DEV); 640 if ((fd = open(device_path, mode)) != -1) 641 goto found; 642 return (-1); 643 found: 644 #endif 645 #ifdef __NetBSD__ 646 fd = opendisk(dev, mode, device_path, sizeof(device_path), 0); 647 if (fd == -1) 648 return -1; 649 device_name = device_path + strlen(_PATH_DEV); 650 #endif 651 652 if (fstat(fd, &sb) == -1) 653 goto close; 654 655 if ((sb.st_mode & S_IFMT) != S_IFREG) { 656 #ifdef DIOCGSECTORSIZE 657 if (ioctl(fd, DIOCGSECTORSIZE, &secsz) == -1 || 658 ioctl(fd, DIOCGMEDIASIZE, &mediasz) == -1) 659 goto close; 660 #endif 661 #ifdef __NetBSD__ 662 if (drvctl(device_name, &secsz, &mediasz) == -1) 663 goto close; 664 #endif 665 } else { 666 secsz = 512; /* Fixed size for files. */ 667 if (sb.st_size % secsz) { 668 errno = EINVAL; 669 goto close; 670 } 671 mediasz = sb.st_size; 672 } 673 674 /* 675 * We require an absolute minimum of 6 sectors. One for the MBR, 676 * 2 for the GPT header, 2 for the GPT table and one to hold some 677 * user data. Let's catch this extreme border case here so that 678 * we don't have to worry about it later. 679 */ 680 if (mediasz / secsz < 6) { 681 errno = ENODEV; 682 goto close; 683 } 684 685 if (verbose) 686 warnx("%s: mediasize=%llu; sectorsize=%u; blocks=%llu", 687 device_name, (long long)mediasz, secsz, 688 (long long)(mediasz / secsz)); 689 690 map_init(mediasz / secsz); 691 692 if (gpt_mbr(fd, 0LL) == -1) 693 goto close; 694 if (gpt_gpt(fd, 1LL) == -1) 695 goto close; 696 if (gpt_gpt(fd, mediasz / secsz - 1LL) == -1) 697 goto close; 698 699 return (fd); 700 701 close: 702 close(fd); 703 return (-1); 704 } 705 706 void 707 gpt_close(int fd) 708 { 709 /* XXX post processing? */ 710 close(fd); 711 } 712 713 static struct { 714 int (*fptr)(int, char *[]); 715 const char *name; 716 } cmdsw[] = { 717 { cmd_add, "add" }, 718 { cmd_create, "create" }, 719 { cmd_destroy, "destroy" }, 720 { NULL, "help" }, 721 { cmd_label, "label" }, 722 { cmd_migrate, "migrate" }, 723 { cmd_recover, "recover" }, 724 { cmd_remove, "remove" }, 725 { NULL, "rename" }, 726 { cmd_show, "show" }, 727 { NULL, "verify" }, 728 { NULL, NULL } 729 }; 730 731 static void 732 usage(void) 733 { 734 735 fprintf(stderr, 736 "usage: %s [-rv] [-p nparts] command [options] device ...\n", 737 getprogname()); 738 exit(1); 739 } 740 741 static void 742 prefix(const char *cmd) 743 { 744 char *pfx; 745 const char *prg; 746 747 prg = getprogname(); 748 pfx = malloc(strlen(prg) + strlen(cmd) + 2); 749 /* Don't bother failing. It's not important */ 750 if (pfx == NULL) 751 return; 752 753 sprintf(pfx, "%s %s", prg, cmd); 754 setprogname(pfx); 755 } 756 757 int 758 main(int argc, char *argv[]) 759 { 760 char *cmd, *p; 761 int ch, i; 762 763 /* Get the generic options */ 764 while ((ch = getopt(argc, argv, "p:rv")) != -1) { 765 switch(ch) { 766 case 'p': 767 if (parts > 0) 768 usage(); 769 parts = strtol(optarg, &p, 10); 770 if (*p != 0 || parts < 1) 771 usage(); 772 break; 773 case 'r': 774 readonly = 1; 775 break; 776 case 'v': 777 verbose++; 778 break; 779 default: 780 usage(); 781 } 782 } 783 if (!parts) 784 parts = 128; 785 786 if (argc == optind) 787 usage(); 788 789 cmd = argv[optind++]; 790 for (i = 0; cmdsw[i].name != NULL && strcmp(cmd, cmdsw[i].name); i++); 791 792 if (cmdsw[i].fptr == NULL) 793 errx(1, "unknown command: %s", cmd); 794 795 prefix(cmd); 796 return ((*cmdsw[i].fptr)(argc, argv)); 797 } 798
Indexes created Mon Sep 22 10:09:38 GMT 2025