1 // SPDX-License-Identifier: GPL-2.0+ 2 /* 3 * cmd_gpt.c -- GPT (GUID Partition Table) handling command 4 * 5 * Copyright (C) 2015 6 * Lukasz Majewski <l.majewski (at) majess.pl> 7 * 8 * Copyright (C) 2012 Samsung Electronics 9 * author: Lukasz Majewski <l.majewski (at) samsung.com> 10 * author: Piotr Wilczek <p.wilczek (at) samsung.com> 11 */ 12 13 #include <common.h> 14 #include <malloc.h> 15 #include <command.h> 16 #include <part_efi.h> 17 #include <exports.h> 18 #include <linux/ctype.h> 19 #include <div64.h> 20 #include <memalign.h> 21 #include <linux/compat.h> 22 #include <linux/sizes.h> 23 #include <stdlib.h> 24 25 static LIST_HEAD(disk_partitions); 26 27 /** 28 * extract_env(): Expand env name from string format '&{env_name}' 29 * and return pointer to the env (if the env is set) 30 * 31 * @param str - pointer to string 32 * @param env - pointer to pointer to extracted env 33 * 34 * @return - zero on successful expand and env is set 35 */ 36 static int extract_env(const char *str, char **env) 37 { 38 int ret = -1; 39 char *e, *s; 40 #ifdef CONFIG_RANDOM_UUID 41 char uuid_str[UUID_STR_LEN + 1]; 42 #endif 43 44 if (!str || strlen(str) < 4) 45 return -1; 46 47 if (!((strncmp(str, "${", 2) == 0) && (str[strlen(str) - 1] == '}'))) 48 return -1; 49 50 s = strdup(str); 51 if (s == NULL) 52 return -1; 53 54 memset(s + strlen(s) - 1, '\0', 1); 55 memmove(s, s + 2, strlen(s) - 1); 56 57 e = env_get(s); 58 if (e == NULL) { 59 #ifdef CONFIG_RANDOM_UUID 60 debug("%s unset. ", str); 61 gen_rand_uuid_str(uuid_str, UUID_STR_FORMAT_GUID); 62 env_set(s, uuid_str); 63 64 e = env_get(s); 65 if (e) { 66 debug("Set to random.\n"); 67 ret = 0; 68 } else { 69 debug("Can't get random UUID.\n"); 70 } 71 #else 72 debug("%s unset.\n", str); 73 #endif 74 } else { 75 debug("%s get from environment.\n", str); 76 ret = 0; 77 } 78 79 *env = e; 80 free(s); 81 82 return ret; 83 } 84 85 /** 86 * extract_val(): Extract value from a key=value pair list (comma separated). 87 * Only value for the given key is returend. 88 * Function allocates memory for the value, remember to free! 89 * 90 * @param str - pointer to string with key=values pairs 91 * @param key - pointer to the key to search for 92 * 93 * @return - pointer to allocated string with the value 94 */ 95 static char *extract_val(const char *str, const char *key) 96 { 97 char *v, *k; 98 char *s, *strcopy; 99 char *new = NULL; 100 101 strcopy = strdup(str); 102 if (strcopy == NULL) 103 return NULL; 104 105 s = strcopy; 106 while (s) { 107 v = strsep(&s, ","); 108 if (!v) 109 break; 110 k = strsep(&v, "="); 111 if (!k) 112 break; 113 if (strcmp(k, key) == 0) { 114 new = strdup(v); 115 break; 116 } 117 } 118 119 free(strcopy); 120 121 return new; 122 } 123 124 /** 125 * found_key(): Found key without value in parameter list (comma separated). 126 * 127 * @param str - pointer to string with key 128 * @param key - pointer to the key to search for 129 * 130 * @return - true on found key 131 */ 132 static bool found_key(const char *str, const char *key) 133 { 134 char *k; 135 char *s, *strcopy; 136 bool result = false; 137 138 strcopy = strdup(str); 139 if (!strcopy) 140 return NULL; 141 142 s = strcopy; 143 while (s) { 144 k = strsep(&s, ","); 145 if (!k) 146 break; 147 if (strcmp(k, key) == 0) { 148 result = true; 149 break; 150 } 151 } 152 153 free(strcopy); 154 155 return result; 156 } 157 158 static int calc_parts_list_len(int numparts) 159 { 160 int partlistlen = UUID_STR_LEN + 1 + strlen("uuid_disk="); 161 /* for the comma */ 162 partlistlen++; 163 164 /* per-partition additions; numparts starts at 1, so this should be correct */ 165 partlistlen += numparts * (strlen("name=,") + PART_NAME_LEN + 1); 166 /* see part.h for definition of struct disk_partition */ 167 partlistlen += numparts * (strlen("start=MiB,") + sizeof(lbaint_t) + 1); 168 partlistlen += numparts * (strlen("size=MiB,") + sizeof(lbaint_t) + 1); 169 partlistlen += numparts * (strlen("uuid=;") + UUID_STR_LEN + 1); 170 /* for the terminating null */ 171 partlistlen++; 172 debug("Length of partitions_list is %d for %d partitions\n", partlistlen, 173 numparts); 174 return partlistlen; 175 } 176 177 #ifdef CONFIG_CMD_GPT_RENAME 178 static void del_gpt_info(void) 179 { 180 struct list_head *pos = &disk_partitions; 181 struct disk_part *curr; 182 while (!list_empty(pos)) { 183 curr = list_entry(pos->next, struct disk_part, list); 184 list_del(pos->next); 185 free(curr); 186 } 187 } 188 189 static struct disk_part *allocate_disk_part(disk_partition_t *info, int partnum) 190 { 191 struct disk_part *newpart; 192 newpart = calloc(1, sizeof(struct disk_part)); 193 if (!newpart) 194 return ERR_PTR(-ENOMEM); 195 196 newpart->gpt_part_info.start = info->start; 197 newpart->gpt_part_info.size = info->size; 198 newpart->gpt_part_info.blksz = info->blksz; 199 strncpy((char *)newpart->gpt_part_info.name, (const char *)info->name, 200 PART_NAME_LEN); 201 newpart->gpt_part_info.name[PART_NAME_LEN - 1] = '\0'; 202 strncpy((char *)newpart->gpt_part_info.type, (const char *)info->type, 203 PART_TYPE_LEN); 204 newpart->gpt_part_info.type[PART_TYPE_LEN - 1] = '\0'; 205 newpart->gpt_part_info.bootable = info->bootable; 206 #ifdef CONFIG_PARTITION_UUIDS 207 strncpy(newpart->gpt_part_info.uuid, (const char *)info->uuid, 208 UUID_STR_LEN); 209 /* UUID_STR_LEN is correct, as uuid[]'s length is UUID_STR_LEN+1 chars */ 210 newpart->gpt_part_info.uuid[UUID_STR_LEN] = '\0'; 211 #endif 212 newpart->partnum = partnum; 213 214 return newpart; 215 } 216 217 static void prettyprint_part_size(char *sizestr, lbaint_t partsize, 218 lbaint_t blksize) 219 { 220 unsigned long long partbytes, partmegabytes; 221 222 partbytes = partsize * blksize; 223 partmegabytes = lldiv(partbytes, SZ_1M); 224 snprintf(sizestr, 16, "%lluMiB", partmegabytes); 225 } 226 227 static void print_gpt_info(void) 228 { 229 struct list_head *pos; 230 struct disk_part *curr; 231 char partstartstr[16]; 232 char partsizestr[16]; 233 234 list_for_each(pos, &disk_partitions) { 235 curr = list_entry(pos, struct disk_part, list); 236 prettyprint_part_size(partstartstr, curr->gpt_part_info.start, 237 curr->gpt_part_info.blksz); 238 prettyprint_part_size(partsizestr, curr->gpt_part_info.size, 239 curr->gpt_part_info.blksz); 240 241 printf("Partition %d:\n", curr->partnum); 242 printf("Start %s, size %s\n", partstartstr, partsizestr); 243 printf("Block size %lu, name %s\n", curr->gpt_part_info.blksz, 244 curr->gpt_part_info.name); 245 printf("Type %s, bootable %d\n", curr->gpt_part_info.type, 246 curr->gpt_part_info.bootable); 247 #ifdef CONFIG_PARTITION_UUIDS 248 printf("UUID %s\n", curr->gpt_part_info.uuid); 249 #endif 250 printf("\n"); 251 } 252 } 253 254 /* 255 * create the string that upstream 'gpt write' command will accept as an 256 * argument 257 * 258 * From doc/README.gpt, Format of partitions layout: 259 * "uuid_disk=...;name=u-boot,size=60MiB,uuid=...; 260 * name=kernel,size=60MiB,uuid=...;" 261 * The fields 'name' and 'size' are mandatory for every partition. 262 * The field 'start' is optional. The fields 'uuid' and 'uuid_disk' 263 * are optional if CONFIG_RANDOM_UUID is enabled. 264 */ 265 static int create_gpt_partitions_list(int numparts, const char *guid, 266 char *partitions_list) 267 { 268 struct list_head *pos; 269 struct disk_part *curr; 270 char partstr[PART_NAME_LEN + 1]; 271 272 if (!partitions_list) 273 return -EINVAL; 274 275 strcpy(partitions_list, "uuid_disk="); 276 strncat(partitions_list, guid, UUID_STR_LEN + 1); 277 strcat(partitions_list, ";"); 278 279 list_for_each(pos, &disk_partitions) { 280 curr = list_entry(pos, struct disk_part, list); 281 strcat(partitions_list, "name="); 282 strncat(partitions_list, (const char *)curr->gpt_part_info.name, 283 PART_NAME_LEN + 1); 284 sprintf(partstr, ",start=0x%llx", 285 (unsigned long long)curr->gpt_part_info.start * 286 curr->gpt_part_info.blksz); 287 /* one extra byte for NULL */ 288 strncat(partitions_list, partstr, PART_NAME_LEN + 1); 289 sprintf(partstr, ",size=0x%llx", 290 (unsigned long long)curr->gpt_part_info.size * 291 curr->gpt_part_info.blksz); 292 strncat(partitions_list, partstr, PART_NAME_LEN + 1); 293 294 strcat(partitions_list, ",uuid="); 295 strncat(partitions_list, curr->gpt_part_info.uuid, 296 UUID_STR_LEN + 1); 297 strcat(partitions_list, ";"); 298 } 299 return 0; 300 } 301 302 /* 303 * read partition info into disk_partitions list where 304 * it can be printed or modified 305 */ 306 static int get_gpt_info(struct blk_desc *dev_desc) 307 { 308 /* start partition numbering at 1, as U-Boot does */ 309 int valid_parts = 0, p, ret; 310 disk_partition_t info; 311 struct disk_part *new_disk_part; 312 313 /* 314 * Always re-read partition info from device, in case 315 * it has changed 316 */ 317 INIT_LIST_HEAD(&disk_partitions); 318 319 for (p = 1; p <= MAX_SEARCH_PARTITIONS; p++) { 320 ret = part_get_info(dev_desc, p, &info); 321 if (ret) 322 continue; 323 324 /* Add 1 here because counter is zero-based but p1 is 325 the first partition */ 326 new_disk_part = allocate_disk_part(&info, valid_parts+1); 327 if (IS_ERR(new_disk_part)) 328 goto out; 329 330 list_add_tail(&new_disk_part->list, &disk_partitions); 331 valid_parts++; 332 } 333 if (valid_parts == 0) { 334 printf("** No valid partitions found **\n"); 335 goto out; 336 } 337 return valid_parts; 338 out: 339 if (valid_parts >= 1) 340 del_gpt_info(); 341 return -ENODEV; 342 } 343 344 /* a wrapper to test get_gpt_info */ 345 static int do_get_gpt_info(struct blk_desc *dev_desc) 346 { 347 int ret; 348 349 ret = get_gpt_info(dev_desc); 350 if (ret > 0) { 351 print_gpt_info(); 352 del_gpt_info(); 353 return 0; 354 } 355 return ret; 356 } 357 #endif 358 359 /** 360 * set_gpt_info(): Fill partition information from string 361 * function allocates memory, remember to free! 362 * 363 * @param dev_desc - pointer block device descriptor 364 * @param str_part - pointer to string with partition information 365 * @param str_disk_guid - pointer to pointer to allocated string with disk guid 366 * @param partitions - pointer to pointer to allocated partitions array 367 * @param parts_count - number of partitions 368 * 369 * @return - zero on success, otherwise error 370 * 371 */ 372 static int set_gpt_info(struct blk_desc *dev_desc, 373 const char *str_part, 374 char **str_disk_guid, 375 disk_partition_t **partitions, 376 u8 *parts_count) 377 { 378 char *tok, *str, *s; 379 int i; 380 char *val, *p; 381 int p_count; 382 disk_partition_t *parts; 383 int errno = 0; 384 uint64_t size_ll, start_ll; 385 lbaint_t offset = 0; 386 int max_str_part = calc_parts_list_len(MAX_SEARCH_PARTITIONS); 387 388 debug("%s: lba num: 0x%x %d\n", __func__, 389 (unsigned int)dev_desc->lba, (unsigned int)dev_desc->lba); 390 391 if (str_part == NULL) 392 return -1; 393 394 str = strdup(str_part); 395 if (str == NULL) 396 return -ENOMEM; 397 398 /* extract disk guid */ 399 s = str; 400 val = extract_val(str, "uuid_disk"); 401 if (!val) { 402 #ifdef CONFIG_RANDOM_UUID 403 *str_disk_guid = malloc(UUID_STR_LEN + 1); 404 if (*str_disk_guid == NULL) 405 return -ENOMEM; 406 gen_rand_uuid_str(*str_disk_guid, UUID_STR_FORMAT_STD); 407 #else 408 free(str); 409 return -2; 410 #endif 411 } else { 412 val = strsep(&val, ";"); 413 if (extract_env(val, &p)) 414 p = val; 415 *str_disk_guid = strdup(p); 416 free(val); 417 /* Move s to first partition */ 418 strsep(&s, ";"); 419 } 420 if (s == NULL) { 421 printf("Error: is the partitions string NULL-terminated?\n"); 422 return -EINVAL; 423 } 424 if (strnlen(s, max_str_part) == 0) 425 return -3; 426 427 i = strnlen(s, max_str_part) - 1; 428 if (s[i] == ';') 429 s[i] = '\0'; 430 431 /* calculate expected number of partitions */ 432 p_count = 1; 433 p = s; 434 while (*p) { 435 if (*p++ == ';') 436 p_count++; 437 } 438 439 /* allocate memory for partitions */ 440 parts = calloc(sizeof(disk_partition_t), p_count); 441 if (parts == NULL) 442 return -ENOMEM; 443 444 /* retrieve partitions data from string */ 445 for (i = 0; i < p_count; i++) { 446 tok = strsep(&s, ";"); 447 448 if (tok == NULL) 449 break; 450 451 /* uuid */ 452 val = extract_val(tok, "uuid"); 453 if (!val) { 454 /* 'uuid' is optional if random uuid's are enabled */ 455 #ifdef CONFIG_RANDOM_UUID 456 gen_rand_uuid_str(parts[i].uuid, UUID_STR_FORMAT_STD); 457 #else 458 errno = -4; 459 goto err; 460 #endif 461 } else { 462 if (extract_env(val, &p)) 463 p = val; 464 if (strnlen(p, max_str_part) >= sizeof(parts[i].uuid)) { 465 printf("Wrong uuid format for partition %d\n", i); 466 errno = -4; 467 goto err; 468 } 469 strncpy((char *)parts[i].uuid, p, max_str_part); 470 free(val); 471 } 472 #ifdef CONFIG_PARTITION_TYPE_GUID 473 /* guid */ 474 val = extract_val(tok, "type"); 475 if (val) { 476 /* 'type' is optional */ 477 if (extract_env(val, &p)) 478 p = val; 479 if (strnlen(p, max_str_part) >= sizeof(parts[i].type_guid)) { 480 printf("Wrong type guid format for partition %d\n", 481 i); 482 errno = -4; 483 goto err; 484 } 485 strncpy((char *)parts[i].type_guid, p, max_str_part); 486 free(val); 487 } 488 #endif 489 /* name */ 490 val = extract_val(tok, "name"); 491 if (!val) { /* name is mandatory */ 492 errno = -4; 493 goto err; 494 } 495 if (extract_env(val, &p)) 496 p = val; 497 if (strnlen(p, max_str_part) >= sizeof(parts[i].name)) { 498 errno = -4; 499 goto err; 500 } 501 strncpy((char *)parts[i].name, p, max_str_part); 502 free(val); 503 504 /* size */ 505 val = extract_val(tok, "size"); 506 if (!val) { /* 'size' is mandatory */ 507 errno = -4; 508 goto err; 509 } 510 if (extract_env(val, &p)) 511 p = val; 512 if ((strcmp(p, "-") == 0)) { 513 /* Let part efi module to auto extend the size */ 514 parts[i].size = 0; 515 } else { 516 size_ll = ustrtoull(p, &p, 0); 517 parts[i].size = lldiv(size_ll, dev_desc->blksz); 518 } 519 520 free(val); 521 522 /* start address */ 523 val = extract_val(tok, "start"); 524 if (val) { /* start address is optional */ 525 if (extract_env(val, &p)) 526 p = val; 527 start_ll = ustrtoull(p, &p, 0); 528 parts[i].start = lldiv(start_ll, dev_desc->blksz); 529 free(val); 530 } 531 532 offset += parts[i].size + parts[i].start; 533 534 /* bootable */ 535 if (found_key(tok, "bootable")) 536 parts[i].bootable = 1; 537 } 538 539 *parts_count = p_count; 540 *partitions = parts; 541 free(str); 542 543 return 0; 544 err: 545 free(str); 546 free(*str_disk_guid); 547 free(parts); 548 549 return errno; 550 } 551 552 static int gpt_default(struct blk_desc *blk_dev_desc, const char *str_part) 553 { 554 int ret; 555 char *str_disk_guid; 556 u8 part_count = 0; 557 disk_partition_t *partitions = NULL; 558 559 /* fill partitions */ 560 ret = set_gpt_info(blk_dev_desc, str_part, 561 &str_disk_guid, &partitions, &part_count); 562 if (ret) { 563 if (ret == -1) 564 printf("No partition list provided\n"); 565 if (ret == -2) 566 printf("Missing disk guid\n"); 567 if ((ret == -3) || (ret == -4)) 568 printf("Partition list incomplete\n"); 569 return -1; 570 } 571 572 /* save partitions layout to disk */ 573 ret = gpt_restore(blk_dev_desc, str_disk_guid, partitions, part_count); 574 free(str_disk_guid); 575 free(partitions); 576 577 return ret; 578 } 579 580 static int gpt_verify(struct blk_desc *blk_dev_desc, const char *str_part) 581 { 582 ALLOC_CACHE_ALIGN_BUFFER_PAD(gpt_header, gpt_head, 1, 583 blk_dev_desc->blksz); 584 disk_partition_t *partitions = NULL; 585 gpt_entry *gpt_pte = NULL; 586 char *str_disk_guid; 587 u8 part_count = 0; 588 int ret = 0; 589 590 /* fill partitions */ 591 ret = set_gpt_info(blk_dev_desc, str_part, 592 &str_disk_guid, &partitions, &part_count); 593 if (ret) { 594 if (ret == -1) { 595 printf("No partition list provided - only basic check\n"); 596 ret = gpt_verify_headers(blk_dev_desc, gpt_head, 597 &gpt_pte); 598 goto out; 599 } 600 if (ret == -2) 601 printf("Missing disk guid\n"); 602 if ((ret == -3) || (ret == -4)) 603 printf("Partition list incomplete\n"); 604 return -1; 605 } 606 607 /* Check partition layout with provided pattern */ 608 ret = gpt_verify_partitions(blk_dev_desc, partitions, part_count, 609 gpt_head, &gpt_pte); 610 free(str_disk_guid); 611 free(partitions); 612 out: 613 free(gpt_pte); 614 return ret; 615 } 616 617 static int do_disk_guid(struct blk_desc *dev_desc, char * const namestr) 618 { 619 int ret; 620 char disk_guid[UUID_STR_LEN + 1]; 621 622 ret = get_disk_guid(dev_desc, disk_guid); 623 if (ret < 0) 624 return CMD_RET_FAILURE; 625 626 if (namestr) 627 env_set(namestr, disk_guid); 628 else 629 printf("%s\n", disk_guid); 630 631 return ret; 632 } 633 634 #ifdef CONFIG_CMD_GPT_RENAME 635 /* 636 * There are 3 malloc() calls in set_gpt_info() and there is no info about which 637 * failed. 638 */ 639 static void set_gpt_cleanup(char **str_disk_guid, 640 disk_partition_t **partitions) 641 { 642 #ifdef CONFIG_RANDOM_UUID 643 if (str_disk_guid) 644 free(str_disk_guid); 645 #endif 646 if (partitions) 647 free(partitions); 648 } 649 650 static int do_rename_gpt_parts(struct blk_desc *dev_desc, char *subcomm, 651 char *name1, char *name2) 652 { 653 struct list_head *pos; 654 struct disk_part *curr; 655 disk_partition_t *new_partitions = NULL; 656 char disk_guid[UUID_STR_LEN + 1]; 657 char *partitions_list, *str_disk_guid; 658 u8 part_count = 0; 659 int partlistlen, ret, numparts = 0, partnum, i = 1, ctr1 = 0, ctr2 = 0; 660 661 if ((subcomm == NULL) || (name1 == NULL) || (name2 == NULL) || 662 (strcmp(subcomm, "swap") && (strcmp(subcomm, "rename")))) 663 return -EINVAL; 664 665 ret = get_disk_guid(dev_desc, disk_guid); 666 if (ret < 0) 667 return ret; 668 /* 669 * Allocates disk_partitions, requiring matching call to del_gpt_info() 670 * if successful. 671 */ 672 numparts = get_gpt_info(dev_desc); 673 if (numparts <= 0) 674 return numparts ? numparts : -ENODEV; 675 676 partlistlen = calc_parts_list_len(numparts); 677 partitions_list = malloc(partlistlen); 678 if (!partitions_list) { 679 del_gpt_info(); 680 return -ENOMEM; 681 } 682 memset(partitions_list, '\0', partlistlen); 683 684 ret = create_gpt_partitions_list(numparts, disk_guid, partitions_list); 685 if (ret < 0) { 686 free(partitions_list); 687 return ret; 688 } 689 /* 690 * Uncomment the following line to print a string that 'gpt write' 691 * or 'gpt verify' will accept as input. 692 */ 693 debug("OLD partitions_list is %s with %u chars\n", partitions_list, 694 (unsigned)strlen(partitions_list)); 695 696 /* set_gpt_info allocates new_partitions and str_disk_guid */ 697 ret = set_gpt_info(dev_desc, partitions_list, &str_disk_guid, 698 &new_partitions, &part_count); 699 if (ret < 0) { 700 del_gpt_info(); 701 free(partitions_list); 702 if (ret == -ENOMEM) 703 set_gpt_cleanup(&str_disk_guid, &new_partitions); 704 else 705 goto out; 706 } 707 708 if (!strcmp(subcomm, "swap")) { 709 if ((strlen(name1) > PART_NAME_LEN) || (strlen(name2) > PART_NAME_LEN)) { 710 printf("Names longer than %d characters are truncated.\n", PART_NAME_LEN); 711 ret = -EINVAL; 712 goto out; 713 } 714 list_for_each(pos, &disk_partitions) { 715 curr = list_entry(pos, struct disk_part, list); 716 if (!strcmp((char *)curr->gpt_part_info.name, name1)) { 717 strcpy((char *)curr->gpt_part_info.name, name2); 718 ctr1++; 719 } else if (!strcmp((char *)curr->gpt_part_info.name, name2)) { 720 strcpy((char *)curr->gpt_part_info.name, name1); 721 ctr2++; 722 } 723 } 724 if ((ctr1 + ctr2 < 2) || (ctr1 != ctr2)) { 725 printf("Cannot swap partition names except in pairs.\n"); 726 ret = -EINVAL; 727 goto out; 728 } 729 } else { /* rename */ 730 if (strlen(name2) > PART_NAME_LEN) { 731 printf("Names longer than %d characters are truncated.\n", PART_NAME_LEN); 732 ret = -EINVAL; 733 goto out; 734 } 735 partnum = (int)simple_strtol(name1, NULL, 10); 736 if ((partnum < 0) || (partnum > numparts)) { 737 printf("Illegal partition number %s\n", name1); 738 ret = -EINVAL; 739 goto out; 740 } 741 ret = part_get_info(dev_desc, partnum, new_partitions); 742 if (ret < 0) 743 goto out; 744 745 /* U-Boot partition numbering starts at 1 */ 746 list_for_each(pos, &disk_partitions) { 747 curr = list_entry(pos, struct disk_part, list); 748 if (i == partnum) { 749 strcpy((char *)curr->gpt_part_info.name, name2); 750 break; 751 } 752 i++; 753 } 754 } 755 756 ret = create_gpt_partitions_list(numparts, disk_guid, partitions_list); 757 if (ret < 0) 758 goto out; 759 debug("NEW partitions_list is %s with %u chars\n", partitions_list, 760 (unsigned)strlen(partitions_list)); 761 762 ret = set_gpt_info(dev_desc, partitions_list, &str_disk_guid, 763 &new_partitions, &part_count); 764 /* 765 * Even though valid pointers are here passed into set_gpt_info(), 766 * it mallocs again, and there's no way to tell which failed. 767 */ 768 if (ret < 0) { 769 del_gpt_info(); 770 free(partitions_list); 771 if (ret == -ENOMEM) 772 set_gpt_cleanup(&str_disk_guid, &new_partitions); 773 else 774 goto out; 775 } 776 777 debug("Writing new partition table\n"); 778 ret = gpt_restore(dev_desc, disk_guid, new_partitions, numparts); 779 if (ret < 0) { 780 printf("Writing new partition table failed\n"); 781 goto out; 782 } 783 784 debug("Reading back new partition table\n"); 785 /* 786 * Empty the existing disk_partitions list, as otherwise the memory in 787 * the original list is unreachable. 788 */ 789 del_gpt_info(); 790 numparts = get_gpt_info(dev_desc); 791 if (numparts <= 0) { 792 ret = numparts ? numparts : -ENODEV; 793 goto out; 794 } 795 printf("new partition table with %d partitions is:\n", numparts); 796 print_gpt_info(); 797 del_gpt_info(); 798 out: 799 free(new_partitions); 800 free(str_disk_guid); 801 free(partitions_list); 802 return ret; 803 } 804 #endif 805 806 /** 807 * do_gpt(): Perform GPT operations 808 * 809 * @param cmdtp - command name 810 * @param flag 811 * @param argc 812 * @param argv 813 * 814 * @return zero on success; otherwise error 815 */ 816 static int do_gpt(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) 817 { 818 int ret = CMD_RET_SUCCESS; 819 int dev = 0; 820 char *ep; 821 struct blk_desc *blk_dev_desc = NULL; 822 823 #ifndef CONFIG_CMD_GPT_RENAME 824 if (argc < 4 || argc > 5) 825 #else 826 if (argc < 4 || argc > 6) 827 #endif 828 return CMD_RET_USAGE; 829 830 dev = (int)simple_strtoul(argv[3], &ep, 10); 831 if (!ep || ep[0] != '\0') { 832 printf("'%s' is not a number\n", argv[3]); 833 return CMD_RET_USAGE; 834 } 835 blk_dev_desc = blk_get_dev(argv[2], dev); 836 if (!blk_dev_desc) { 837 printf("%s: %s dev %d NOT available\n", 838 __func__, argv[2], dev); 839 return CMD_RET_FAILURE; 840 } 841 842 if ((strcmp(argv[1], "write") == 0) && (argc == 5)) { 843 printf("Writing GPT: "); 844 ret = gpt_default(blk_dev_desc, argv[4]); 845 } else if ((strcmp(argv[1], "verify") == 0)) { 846 ret = gpt_verify(blk_dev_desc, argv[4]); 847 printf("Verify GPT: "); 848 } else if (strcmp(argv[1], "guid") == 0) { 849 ret = do_disk_guid(blk_dev_desc, argv[4]); 850 #ifdef CONFIG_CMD_GPT_RENAME 851 } else if (strcmp(argv[1], "read") == 0) { 852 ret = do_get_gpt_info(blk_dev_desc); 853 } else if ((strcmp(argv[1], "swap") == 0) || 854 (strcmp(argv[1], "rename") == 0)) { 855 ret = do_rename_gpt_parts(blk_dev_desc, argv[1], argv[4], argv[5]); 856 #endif 857 } else { 858 return CMD_RET_USAGE; 859 } 860 861 if (ret) { 862 printf("error!\n"); 863 return CMD_RET_FAILURE; 864 } 865 866 printf("success!\n"); 867 return CMD_RET_SUCCESS; 868 } 869 870 U_BOOT_CMD(gpt, CONFIG_SYS_MAXARGS, 1, do_gpt, 871 "GUID Partition Table", 872 "<command> <interface> <dev> <partitions_list>\n" 873 " - GUID partition table restoration and validity check\n" 874 " Restore or verify GPT information on a device connected\n" 875 " to interface\n" 876 " Example usage:\n" 877 " gpt write mmc 0 $partitions\n" 878 " gpt verify mmc 0 $partitions\n" 879 " read <interface> <dev>\n" 880 " - read GPT into a data structure for manipulation\n" 881 " guid <interface> <dev>\n" 882 " - print disk GUID\n" 883 " guid <interface> <dev> <varname>\n" 884 " - set environment variable to disk GUID\n" 885 " Example usage:\n" 886 " gpt guid mmc 0\n" 887 " gpt guid mmc 0 varname\n" 888 #ifdef CONFIG_CMD_GPT_RENAME 889 "gpt partition renaming commands:\n" 890 "gpt swap <interface> <dev> <name1> <name2>\n" 891 " - change all partitions named name1 to name2\n" 892 " and vice-versa\n" 893 "gpt rename <interface> <dev> <part> <name>\n" 894 " - rename the specified partition\n" 895 " Example usage:\n" 896 " gpt swap mmc 0 foo bar\n" 897 " gpt rename mmc 0 3 foo\n" 898 #endif 899 ); 900
