1 /* 2 * cmd_gpt.c -- GPT (GUID Partition Table) handling command 3 * 4 * Copyright (C) 2015 5 * Lukasz Majewski <l.majewski@majess.pl> 6 * 7 * Copyright (C) 2012 Samsung Electronics 8 * author: Lukasz Majewski <l.majewski@samsung.com> 9 * author: Piotr Wilczek <p.wilczek@samsung.com> 10 * 11 * SPDX-License-Identifier: GPL-2.0+ 12 */ 13 14 #include <common.h> 15 #include <malloc.h> 16 #include <command.h> 17 #include <part_efi.h> 18 #include <exports.h> 19 #include <linux/ctype.h> 20 #include <div64.h> 21 #include <memalign.h> 22 #include <linux/compat.h> 23 #include <linux/sizes.h> 24 #include <stdlib.h> 25 26 static LIST_HEAD(disk_partitions); 27 28 /** 29 * extract_env(): Expand env name from string format '&{env_name}' 30 * and return pointer to the env (if the env is set) 31 * 32 * @param str - pointer to string 33 * @param env - pointer to pointer to extracted env 34 * 35 * @return - zero on successful expand and env is set 36 */ 37 static int extract_env(const char *str, char **env) 38 { 39 int ret = -1; 40 char *e, *s; 41 #ifdef CONFIG_RANDOM_UUID 42 char uuid_str[UUID_STR_LEN + 1]; 43 #endif 44 45 if (!str || strlen(str) < 4) 46 return -1; 47 48 if (!((strncmp(str, "${", 2) == 0) && (str[strlen(str) - 1] == '}'))) 49 return -1; 50 51 s = strdup(str); 52 if (s == NULL) 53 return -1; 54 55 memset(s + strlen(s) - 1, '\0', 1); 56 memmove(s, s + 2, strlen(s) - 1); 57 58 e = env_get(s); 59 if (e == NULL) { 60 #ifdef CONFIG_RANDOM_UUID 61 debug("%s unset. ", str); 62 gen_rand_uuid_str(uuid_str, UUID_STR_FORMAT_GUID); 63 env_set(s, uuid_str); 64 65 e = env_get(s); 66 if (e) { 67 debug("Set to random.\n"); 68 ret = 0; 69 } else { 70 debug("Can't get random UUID.\n"); 71 } 72 #else 73 debug("%s unset.\n", str); 74 #endif 75 } else { 76 debug("%s get from environment.\n", str); 77 ret = 0; 78 } 79 80 *env = e; 81 free(s); 82 83 return ret; 84 } 85 86 /** 87 * extract_val(): Extract value from a key=value pair list (comma separated). 88 * Only value for the given key is returend. 89 * Function allocates memory for the value, remember to free! 90 * 91 * @param str - pointer to string with key=values pairs 92 * @param key - pointer to the key to search for 93 * 94 * @return - pointer to allocated string with the value 95 */ 96 static char *extract_val(const char *str, const char *key) 97 { 98 char *v, *k; 99 char *s, *strcopy; 100 char *new = NULL; 101 102 strcopy = strdup(str); 103 if (strcopy == NULL) 104 return NULL; 105 106 s = strcopy; 107 while (s) { 108 v = strsep(&s, ","); 109 if (!v) 110 break; 111 k = strsep(&v, "="); 112 if (!k) 113 break; 114 if (strcmp(k, key) == 0) { 115 new = strdup(v); 116 break; 117 } 118 } 119 120 free(strcopy); 121 122 return new; 123 } 124 125 /** 126 * found_key(): Found key without value in parameter list (comma separated). 127 * 128 * @param str - pointer to string with key 129 * @param key - pointer to the key to search for 130 * 131 * @return - true on found key 132 */ 133 static bool found_key(const char *str, const char *key) 134 { 135 char *k; 136 char *s, *strcopy; 137 bool result = false; 138 139 strcopy = strdup(str); 140 if (!strcopy) 141 return NULL; 142 143 s = strcopy; 144 while (s) { 145 k = strsep(&s, ","); 146 if (!k) 147 break; 148 if (strcmp(k, key) == 0) { 149 result = true; 150 break; 151 } 152 } 153 154 free(strcopy); 155 156 return result; 157 } 158 159 static int calc_parts_list_len(int numparts) 160 { 161 int partlistlen = UUID_STR_LEN + 1 + strlen("uuid_disk="); 162 /* for the comma */ 163 partlistlen++; 164 165 /* per-partition additions; numparts starts at 1, so this should be correct */ 166 partlistlen += numparts * (strlen("name=,") + PART_NAME_LEN + 1); 167 /* see part.h for definition of struct disk_partition */ 168 partlistlen += numparts * (strlen("start=MiB,") + sizeof(lbaint_t) + 1); 169 partlistlen += numparts * (strlen("size=MiB,") + sizeof(lbaint_t) + 1); 170 partlistlen += numparts * (strlen("uuid=;") + UUID_STR_LEN + 1); 171 /* for the terminating null */ 172 partlistlen++; 173 debug("Length of partitions_list is %d for %d partitions\n", partlistlen, 174 numparts); 175 return partlistlen; 176 } 177 178 #ifdef CONFIG_CMD_GPT_RENAME 179 static void del_gpt_info(void) 180 { 181 struct list_head *pos = &disk_partitions; 182 struct disk_part *curr; 183 while (!list_empty(pos)) { 184 curr = list_entry(pos->next, struct disk_part, list); 185 list_del(pos->next); 186 free(curr); 187 } 188 } 189 190 static struct disk_part *allocate_disk_part(disk_partition_t *info, int partnum) 191 { 192 struct disk_part *newpart; 193 newpart = calloc(1, sizeof(struct disk_part)); 194 if (!newpart) 195 return ERR_PTR(-ENOMEM); 196 197 newpart->gpt_part_info.start = info->start; 198 newpart->gpt_part_info.size = info->size; 199 newpart->gpt_part_info.blksz = info->blksz; 200 strncpy((char *)newpart->gpt_part_info.name, (const char *)info->name, 201 PART_NAME_LEN); 202 newpart->gpt_part_info.name[PART_NAME_LEN - 1] = '\0'; 203 strncpy((char *)newpart->gpt_part_info.type, (const char *)info->type, 204 PART_TYPE_LEN); 205 newpart->gpt_part_info.type[PART_TYPE_LEN - 1] = '\0'; 206 newpart->gpt_part_info.bootable = info->bootable; 207 #ifdef CONFIG_PARTITION_UUIDS 208 strncpy(newpart->gpt_part_info.uuid, (const char *)info->uuid, 209 UUID_STR_LEN); 210 /* UUID_STR_LEN is correct, as uuid[]'s length is UUID_STR_LEN+1 chars */ 211 newpart->gpt_part_info.uuid[UUID_STR_LEN] = '\0'; 212 #endif 213 newpart->partnum = partnum; 214 215 return newpart; 216 } 217 218 static void prettyprint_part_size(char *sizestr, lbaint_t partsize, 219 lbaint_t blksize) 220 { 221 unsigned long long partbytes, partmegabytes; 222 223 partbytes = partsize * blksize; 224 partmegabytes = lldiv(partbytes, SZ_1M); 225 snprintf(sizestr, 16, "%lluMiB", partmegabytes); 226 } 227 228 static void print_gpt_info(void) 229 { 230 struct list_head *pos; 231 struct disk_part *curr; 232 char partstartstr[16]; 233 char partsizestr[16]; 234 235 list_for_each(pos, &disk_partitions) { 236 curr = list_entry(pos, struct disk_part, list); 237 prettyprint_part_size(partstartstr, curr->gpt_part_info.start, 238 curr->gpt_part_info.blksz); 239 prettyprint_part_size(partsizestr, curr->gpt_part_info.size, 240 curr->gpt_part_info.blksz); 241 242 printf("Partition %d:\n", curr->partnum); 243 printf("Start %s, size %s\n", partstartstr, partsizestr); 244 printf("Block size %lu, name %s\n", curr->gpt_part_info.blksz, 245 curr->gpt_part_info.name); 246 printf("Type %s, bootable %d\n", curr->gpt_part_info.type, 247 curr->gpt_part_info.bootable); 248 #ifdef CONFIG_PARTITION_UUIDS 249 printf("UUID %s\n", curr->gpt_part_info.uuid); 250 #endif 251 printf("\n"); 252 } 253 } 254 255 /* 256 * create the string that upstream 'gpt write' command will accept as an 257 * argument 258 * 259 * From doc/README.gpt, Format of partitions layout: 260 * "uuid_disk=...;name=u-boot,size=60MiB,uuid=...; 261 * name=kernel,size=60MiB,uuid=...;" 262 * The fields 'name' and 'size' are mandatory for every partition. 263 * The field 'start' is optional. The fields 'uuid' and 'uuid_disk' 264 * are optional if CONFIG_RANDOM_UUID is enabled. 265 */ 266 static int create_gpt_partitions_list(int numparts, const char *guid, 267 char *partitions_list) 268 { 269 struct list_head *pos; 270 struct disk_part *curr; 271 char partstr[PART_NAME_LEN + 1]; 272 273 if (!partitions_list) 274 return -EINVAL; 275 276 strcpy(partitions_list, "uuid_disk="); 277 strncat(partitions_list, guid, UUID_STR_LEN + 1); 278 strcat(partitions_list, ";"); 279 280 list_for_each(pos, &disk_partitions) { 281 curr = list_entry(pos, struct disk_part, list); 282 strcat(partitions_list, "name="); 283 strncat(partitions_list, (const char *)curr->gpt_part_info.name, 284 PART_NAME_LEN + 1); 285 sprintf(partstr, ",start=0x%llx", 286 (unsigned long long)curr->gpt_part_info.start * 287 curr->gpt_part_info.blksz); 288 /* one extra byte for NULL */ 289 strncat(partitions_list, partstr, PART_NAME_LEN + 1); 290 sprintf(partstr, ",size=0x%llx", 291 (unsigned long long)curr->gpt_part_info.size * 292 curr->gpt_part_info.blksz); 293 strncat(partitions_list, partstr, PART_NAME_LEN + 1); 294 295 strcat(partitions_list, ",uuid="); 296 strncat(partitions_list, curr->gpt_part_info.uuid, 297 UUID_STR_LEN + 1); 298 strcat(partitions_list, ";"); 299 } 300 return 0; 301 } 302 303 /* 304 * read partition info into disk_partitions list where 305 * it can be printed or modified 306 */ 307 static int get_gpt_info(struct blk_desc *dev_desc) 308 { 309 /* start partition numbering at 1, as U-Boot does */ 310 int valid_parts = 0, p, ret; 311 disk_partition_t info; 312 struct disk_part *new_disk_part; 313 314 /* 315 * Always re-read partition info from device, in case 316 * it has changed 317 */ 318 INIT_LIST_HEAD(&disk_partitions); 319 320 for (p = 1; p <= MAX_SEARCH_PARTITIONS; p++) { 321 ret = part_get_info(dev_desc, p, &info); 322 if (ret) 323 continue; 324 325 /* Add 1 here because counter is zero-based but p1 is 326 the first partition */ 327 new_disk_part = allocate_disk_part(&info, valid_parts+1); 328 if (IS_ERR(new_disk_part)) 329 goto out; 330 331 list_add_tail(&new_disk_part->list, &disk_partitions); 332 valid_parts++; 333 } 334 if (valid_parts == 0) { 335 printf("** No valid partitions found **\n"); 336 goto out; 337 } 338 return valid_parts; 339 out: 340 if (valid_parts >= 1) 341 del_gpt_info(); 342 return -ENODEV; 343 } 344 345 /* a wrapper to test get_gpt_info */ 346 static int do_get_gpt_info(struct blk_desc *dev_desc) 347 { 348 int ret; 349 350 ret = get_gpt_info(dev_desc); 351 if (ret > 0) { 352 print_gpt_info(); 353 del_gpt_info(); 354 return 0; 355 } 356 return ret; 357 } 358 #endif 359 360 /** 361 * set_gpt_info(): Fill partition information from string 362 * function allocates memory, remember to free! 363 * 364 * @param dev_desc - pointer block device descriptor 365 * @param str_part - pointer to string with partition information 366 * @param str_disk_guid - pointer to pointer to allocated string with disk guid 367 * @param partitions - pointer to pointer to allocated partitions array 368 * @param parts_count - number of partitions 369 * 370 * @return - zero on success, otherwise error 371 * 372 */ 373 static int set_gpt_info(struct blk_desc *dev_desc, 374 const char *str_part, 375 char **str_disk_guid, 376 disk_partition_t **partitions, 377 u8 *parts_count) 378 { 379 char *tok, *str, *s; 380 int i; 381 char *val, *p; 382 int p_count; 383 disk_partition_t *parts; 384 int errno = 0; 385 uint64_t size_ll, start_ll; 386 lbaint_t offset = 0; 387 int max_str_part = calc_parts_list_len(MAX_SEARCH_PARTITIONS); 388 389 debug("%s: lba num: 0x%x %d\n", __func__, 390 (unsigned int)dev_desc->lba, (unsigned int)dev_desc->lba); 391 392 if (str_part == NULL) 393 return -1; 394 395 str = strdup(str_part); 396 if (str == NULL) 397 return -ENOMEM; 398 399 /* extract disk guid */ 400 s = str; 401 val = extract_val(str, "uuid_disk"); 402 if (!val) { 403 #ifdef CONFIG_RANDOM_UUID 404 *str_disk_guid = malloc(UUID_STR_LEN + 1); 405 if (*str_disk_guid == NULL) 406 return -ENOMEM; 407 gen_rand_uuid_str(*str_disk_guid, UUID_STR_FORMAT_STD); 408 #else 409 free(str); 410 return -2; 411 #endif 412 } else { 413 val = strsep(&val, ";"); 414 if (extract_env(val, &p)) 415 p = val; 416 *str_disk_guid = strdup(p); 417 free(val); 418 /* Move s to first partition */ 419 strsep(&s, ";"); 420 } 421 if (s == NULL) { 422 printf("Error: is the partitions string NULL-terminated?\n"); 423 return -EINVAL; 424 } 425 if (strnlen(s, max_str_part) == 0) 426 return -3; 427 428 i = strnlen(s, max_str_part) - 1; 429 if (s[i] == ';') 430 s[i] = '\0'; 431 432 /* calculate expected number of partitions */ 433 p_count = 1; 434 p = s; 435 while (*p) { 436 if (*p++ == ';') 437 p_count++; 438 } 439 440 /* allocate memory for partitions */ 441 parts = calloc(sizeof(disk_partition_t), p_count); 442 if (parts == NULL) 443 return -ENOMEM; 444 445 /* retrieve partitions data from string */ 446 for (i = 0; i < p_count; i++) { 447 tok = strsep(&s, ";"); 448 449 if (tok == NULL) 450 break; 451 452 /* uuid */ 453 val = extract_val(tok, "uuid"); 454 if (!val) { 455 /* 'uuid' is optional if random uuid's are enabled */ 456 #ifdef CONFIG_RANDOM_UUID 457 gen_rand_uuid_str(parts[i].uuid, UUID_STR_FORMAT_STD); 458 #else 459 errno = -4; 460 goto err; 461 #endif 462 } else { 463 if (extract_env(val, &p)) 464 p = val; 465 if (strnlen(p, max_str_part) >= sizeof(parts[i].uuid)) { 466 printf("Wrong uuid format for partition %d\n", i); 467 errno = -4; 468 goto err; 469 } 470 strncpy((char *)parts[i].uuid, p, max_str_part); 471 free(val); 472 } 473 #ifdef CONFIG_PARTITION_TYPE_GUID 474 /* guid */ 475 val = extract_val(tok, "type"); 476 if (val) { 477 /* 'type' is optional */ 478 if (extract_env(val, &p)) 479 p = val; 480 if (strnlen(p, max_str_part) >= sizeof(parts[i].type_guid)) { 481 printf("Wrong type guid format for partition %d\n", 482 i); 483 errno = -4; 484 goto err; 485 } 486 strncpy((char *)parts[i].type_guid, p, max_str_part); 487 free(val); 488 } 489 #endif 490 /* name */ 491 val = extract_val(tok, "name"); 492 if (!val) { /* name is mandatory */ 493 errno = -4; 494 goto err; 495 } 496 if (extract_env(val, &p)) 497 p = val; 498 if (strnlen(p, max_str_part) >= sizeof(parts[i].name)) { 499 errno = -4; 500 goto err; 501 } 502 strncpy((char *)parts[i].name, p, max_str_part); 503 free(val); 504 505 /* size */ 506 val = extract_val(tok, "size"); 507 if (!val) { /* 'size' is mandatory */ 508 errno = -4; 509 goto err; 510 } 511 if (extract_env(val, &p)) 512 p = val; 513 if ((strcmp(p, "-") == 0)) { 514 /* Let part efi module to auto extend the size */ 515 parts[i].size = 0; 516 } else { 517 size_ll = ustrtoull(p, &p, 0); 518 parts[i].size = lldiv(size_ll, dev_desc->blksz); 519 } 520 521 free(val); 522 523 /* start address */ 524 val = extract_val(tok, "start"); 525 if (val) { /* start address is optional */ 526 if (extract_env(val, &p)) 527 p = val; 528 start_ll = ustrtoull(p, &p, 0); 529 parts[i].start = lldiv(start_ll, dev_desc->blksz); 530 free(val); 531 } 532 533 offset += parts[i].size + parts[i].start; 534 535 /* bootable */ 536 if (found_key(tok, "bootable")) 537 parts[i].bootable = 1; 538 } 539 540 *parts_count = p_count; 541 *partitions = parts; 542 free(str); 543 544 return 0; 545 err: 546 free(str); 547 free(*str_disk_guid); 548 free(parts); 549 550 return errno; 551 } 552 553 static int gpt_default(struct blk_desc *blk_dev_desc, const char *str_part) 554 { 555 int ret; 556 char *str_disk_guid; 557 u8 part_count = 0; 558 disk_partition_t *partitions = NULL; 559 560 /* fill partitions */ 561 ret = set_gpt_info(blk_dev_desc, str_part, 562 &str_disk_guid, &partitions, &part_count); 563 if (ret) { 564 if (ret == -1) 565 printf("No partition list provided\n"); 566 if (ret == -2) 567 printf("Missing disk guid\n"); 568 if ((ret == -3) || (ret == -4)) 569 printf("Partition list incomplete\n"); 570 return -1; 571 } 572 573 /* save partitions layout to disk */ 574 ret = gpt_restore(blk_dev_desc, str_disk_guid, partitions, part_count); 575 free(str_disk_guid); 576 free(partitions); 577 578 return ret; 579 } 580 581 static int gpt_verify(struct blk_desc *blk_dev_desc, const char *str_part) 582 { 583 ALLOC_CACHE_ALIGN_BUFFER_PAD(gpt_header, gpt_head, 1, 584 blk_dev_desc->blksz); 585 disk_partition_t *partitions = NULL; 586 gpt_entry *gpt_pte = NULL; 587 char *str_disk_guid; 588 u8 part_count = 0; 589 int ret = 0; 590 591 /* fill partitions */ 592 ret = set_gpt_info(blk_dev_desc, str_part, 593 &str_disk_guid, &partitions, &part_count); 594 if (ret) { 595 if (ret == -1) { 596 printf("No partition list provided - only basic check\n"); 597 ret = gpt_verify_headers(blk_dev_desc, gpt_head, 598 &gpt_pte); 599 goto out; 600 } 601 if (ret == -2) 602 printf("Missing disk guid\n"); 603 if ((ret == -3) || (ret == -4)) 604 printf("Partition list incomplete\n"); 605 return -1; 606 } 607 608 /* Check partition layout with provided pattern */ 609 ret = gpt_verify_partitions(blk_dev_desc, partitions, part_count, 610 gpt_head, &gpt_pte); 611 free(str_disk_guid); 612 free(partitions); 613 out: 614 free(gpt_pte); 615 return ret; 616 } 617 618 static int do_disk_guid(struct blk_desc *dev_desc, char * const namestr) 619 { 620 int ret; 621 char disk_guid[UUID_STR_LEN + 1]; 622 623 ret = get_disk_guid(dev_desc, disk_guid); 624 if (ret < 0) 625 return CMD_RET_FAILURE; 626 627 if (namestr) 628 env_set(namestr, disk_guid); 629 else 630 printf("%s\n", disk_guid); 631 632 return ret; 633 } 634 635 #ifdef CONFIG_CMD_GPT_RENAME 636 /* 637 * There are 3 malloc() calls in set_gpt_info() and there is no info about which 638 * failed. 639 */ 640 static void set_gpt_cleanup(char **str_disk_guid, 641 disk_partition_t **partitions) 642 { 643 #ifdef CONFIG_RANDOM_UUID 644 if (str_disk_guid) 645 free(str_disk_guid); 646 #endif 647 if (partitions) 648 free(partitions); 649 } 650 651 static int do_rename_gpt_parts(struct blk_desc *dev_desc, char *subcomm, 652 char *name1, char *name2) 653 { 654 struct list_head *pos; 655 struct disk_part *curr; 656 disk_partition_t *new_partitions = NULL; 657 char disk_guid[UUID_STR_LEN + 1]; 658 char *partitions_list, *str_disk_guid; 659 u8 part_count = 0; 660 int partlistlen, ret, numparts = 0, partnum, i = 1, ctr1 = 0, ctr2 = 0; 661 662 if ((subcomm == NULL) || (name1 == NULL) || (name2 == NULL) || 663 (strcmp(subcomm, "swap") && (strcmp(subcomm, "rename")))) 664 return -EINVAL; 665 666 ret = get_disk_guid(dev_desc, disk_guid); 667 if (ret < 0) 668 return ret; 669 /* 670 * Allocates disk_partitions, requiring matching call to del_gpt_info() 671 * if successful. 672 */ 673 numparts = get_gpt_info(dev_desc); 674 if (numparts <= 0) 675 return numparts ? numparts : -ENODEV; 676 677 partlistlen = calc_parts_list_len(numparts); 678 partitions_list = malloc(partlistlen); 679 if (!partitions_list) { 680 del_gpt_info(); 681 return -ENOMEM; 682 } 683 memset(partitions_list, '\0', partlistlen); 684 685 ret = create_gpt_partitions_list(numparts, disk_guid, partitions_list); 686 if (ret < 0) { 687 free(partitions_list); 688 return ret; 689 } 690 /* 691 * Uncomment the following line to print a string that 'gpt write' 692 * or 'gpt verify' will accept as input. 693 */ 694 debug("OLD partitions_list is %s with %u chars\n", partitions_list, 695 (unsigned)strlen(partitions_list)); 696 697 /* set_gpt_info allocates new_partitions and str_disk_guid */ 698 ret = set_gpt_info(dev_desc, partitions_list, &str_disk_guid, 699 &new_partitions, &part_count); 700 if (ret < 0) { 701 del_gpt_info(); 702 free(partitions_list); 703 if (ret == -ENOMEM) 704 set_gpt_cleanup(&str_disk_guid, &new_partitions); 705 else 706 goto out; 707 } 708 709 if (!strcmp(subcomm, "swap")) { 710 if ((strlen(name1) > PART_NAME_LEN) || (strlen(name2) > PART_NAME_LEN)) { 711 printf("Names longer than %d characters are truncated.\n", PART_NAME_LEN); 712 ret = -EINVAL; 713 goto out; 714 } 715 list_for_each(pos, &disk_partitions) { 716 curr = list_entry(pos, struct disk_part, list); 717 if (!strcmp((char *)curr->gpt_part_info.name, name1)) { 718 strcpy((char *)curr->gpt_part_info.name, name2); 719 ctr1++; 720 } else if (!strcmp((char *)curr->gpt_part_info.name, name2)) { 721 strcpy((char *)curr->gpt_part_info.name, name1); 722 ctr2++; 723 } 724 } 725 if ((ctr1 + ctr2 < 2) || (ctr1 != ctr2)) { 726 printf("Cannot swap partition names except in pairs.\n"); 727 ret = -EINVAL; 728 goto out; 729 } 730 } else { /* rename */ 731 if (strlen(name2) > PART_NAME_LEN) { 732 printf("Names longer than %d characters are truncated.\n", PART_NAME_LEN); 733 ret = -EINVAL; 734 goto out; 735 } 736 partnum = (int)simple_strtol(name1, NULL, 10); 737 if ((partnum < 0) || (partnum > numparts)) { 738 printf("Illegal partition number %s\n", name1); 739 ret = -EINVAL; 740 goto out; 741 } 742 ret = part_get_info(dev_desc, partnum, new_partitions); 743 if (ret < 0) 744 goto out; 745 746 /* U-Boot partition numbering starts at 1 */ 747 list_for_each(pos, &disk_partitions) { 748 curr = list_entry(pos, struct disk_part, list); 749 if (i == partnum) { 750 strcpy((char *)curr->gpt_part_info.name, name2); 751 break; 752 } 753 i++; 754 } 755 } 756 757 ret = create_gpt_partitions_list(numparts, disk_guid, partitions_list); 758 if (ret < 0) 759 goto out; 760 debug("NEW partitions_list is %s with %u chars\n", partitions_list, 761 (unsigned)strlen(partitions_list)); 762 763 ret = set_gpt_info(dev_desc, partitions_list, &str_disk_guid, 764 &new_partitions, &part_count); 765 /* 766 * Even though valid pointers are here passed into set_gpt_info(), 767 * it mallocs again, and there's no way to tell which failed. 768 */ 769 if (ret < 0) { 770 del_gpt_info(); 771 free(partitions_list); 772 if (ret == -ENOMEM) 773 set_gpt_cleanup(&str_disk_guid, &new_partitions); 774 else 775 goto out; 776 } 777 778 debug("Writing new partition table\n"); 779 ret = gpt_restore(dev_desc, disk_guid, new_partitions, numparts); 780 if (ret < 0) { 781 printf("Writing new partition table failed\n"); 782 goto out; 783 } 784 785 debug("Reading back new partition table\n"); 786 /* 787 * Empty the existing disk_partitions list, as otherwise the memory in 788 * the original list is unreachable. 789 */ 790 del_gpt_info(); 791 numparts = get_gpt_info(dev_desc); 792 if (numparts <= 0) { 793 ret = numparts ? numparts : -ENODEV; 794 goto out; 795 } 796 printf("new partition table with %d partitions is:\n", numparts); 797 print_gpt_info(); 798 del_gpt_info(); 799 out: 800 free(new_partitions); 801 free(str_disk_guid); 802 free(partitions_list); 803 return ret; 804 } 805 #endif 806 807 /** 808 * do_gpt(): Perform GPT operations 809 * 810 * @param cmdtp - command name 811 * @param flag 812 * @param argc 813 * @param argv 814 * 815 * @return zero on success; otherwise error 816 */ 817 static int do_gpt(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) 818 { 819 int ret = CMD_RET_SUCCESS; 820 int dev = 0; 821 char *ep; 822 struct blk_desc *blk_dev_desc = NULL; 823 824 #ifndef CONFIG_CMD_GPT_RENAME 825 if (argc < 4 || argc > 5) 826 #else 827 if (argc < 4 || argc > 6) 828 #endif 829 return CMD_RET_USAGE; 830 831 dev = (int)simple_strtoul(argv[3], &ep, 10); 832 if (!ep || ep[0] != '\0') { 833 printf("'%s' is not a number\n", argv[3]); 834 return CMD_RET_USAGE; 835 } 836 blk_dev_desc = blk_get_dev(argv[2], dev); 837 if (!blk_dev_desc) { 838 printf("%s: %s dev %d NOT available\n", 839 __func__, argv[2], dev); 840 return CMD_RET_FAILURE; 841 } 842 843 if ((strcmp(argv[1], "write") == 0) && (argc == 5)) { 844 printf("Writing GPT: "); 845 ret = gpt_default(blk_dev_desc, argv[4]); 846 } else if ((strcmp(argv[1], "verify") == 0)) { 847 ret = gpt_verify(blk_dev_desc, argv[4]); 848 printf("Verify GPT: "); 849 } else if (strcmp(argv[1], "guid") == 0) { 850 ret = do_disk_guid(blk_dev_desc, argv[4]); 851 #ifdef CONFIG_CMD_GPT_RENAME 852 } else if (strcmp(argv[1], "read") == 0) { 853 ret = do_get_gpt_info(blk_dev_desc); 854 } else if ((strcmp(argv[1], "swap") == 0) || 855 (strcmp(argv[1], "rename") == 0)) { 856 ret = do_rename_gpt_parts(blk_dev_desc, argv[1], argv[4], argv[5]); 857 #endif 858 } else { 859 return CMD_RET_USAGE; 860 } 861 862 if (ret) { 863 printf("error!\n"); 864 return CMD_RET_FAILURE; 865 } 866 867 printf("success!\n"); 868 return CMD_RET_SUCCESS; 869 } 870 871 U_BOOT_CMD(gpt, CONFIG_SYS_MAXARGS, 1, do_gpt, 872 "GUID Partition Table", 873 "<command> <interface> <dev> <partitions_list>\n" 874 " - GUID partition table restoration and validity check\n" 875 " Restore or verify GPT information on a device connected\n" 876 " to interface\n" 877 " Example usage:\n" 878 " gpt write mmc 0 $partitions\n" 879 " gpt verify mmc 0 $partitions\n" 880 " read <interface> <dev>\n" 881 " - read GPT into a data structure for manipulation\n" 882 " guid <interface> <dev>\n" 883 " - print disk GUID\n" 884 " guid <interface> <dev> <varname>\n" 885 " - set environment variable to disk GUID\n" 886 " Example usage:\n" 887 " gpt guid mmc 0\n" 888 " gpt guid mmc 0 varname\n" 889 #ifdef CONFIG_CMD_GPT_RENAME 890 "gpt partition renaming commands:\n" 891 "gpt swap <interface> <dev> <name1> <name2>\n" 892 " - change all partitions named name1 to name2\n" 893 " and vice-versa\n" 894 "gpt rename <interface> <dev> <part> <name>\n" 895 " - rename the specified partition\n" 896 " Example usage:\n" 897 " gpt swap mmc 0 foo bar\n" 898 " gpt rename mmc 0 3 foo\n" 899 #endif 900 ); 901