disk/part.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * (C) Copyright 2001
   4  * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
   5  */
   6
   7 #include <common.h>
   8 #include <command.h>
   9 #include <errno.h>
  10 #include <ide.h>
  11 #include <malloc.h>
  12 #include <part.h>
  13 #include <ubifs_uboot.h>
  14
  15 #undef  PART_DEBUG
  16
  17 #ifdef  PART_DEBUG
  18 #define PRINTF(fmt,args...)     printf (fmt ,##args)
  19 #else
  20 #define PRINTF(fmt,args...)
  21 #endif
  22
  23 /* Check all partition types */
  24 #define PART_TYPE_ALL           -1
  25
  26 static struct part_driver *part_driver_lookup_type(struct blk_desc *dev_desc)
  27 {
  28         struct part_driver *drv =
  29                 ll_entry_start(struct part_driver, part_driver);
  30         const int n_ents = ll_entry_count(struct part_driver, part_driver);
  31         struct part_driver *entry;
  32
  33         if (dev_desc->part_type == PART_TYPE_UNKNOWN) {
  34                 for (entry = drv; entry != drv + n_ents; entry++) {
  35                         int ret;
  36
  37                         ret = entry->test(dev_desc);
  38                         if (!ret) {
  39                                 dev_desc->part_type = entry->part_type;
  40                                 return entry;
  41                         }
  42                 }
  43         } else {
  44                 for (entry = drv; entry != drv + n_ents; entry++) {
  45                         if (dev_desc->part_type == entry->part_type)
  46                                 return entry;
  47                 }
  48         }
  49
  50         /* Not found */
  51         return NULL;
  52 }
  53
  54 #ifdef CONFIG_HAVE_BLOCK_DEVICE
  55 static struct blk_desc *get_dev_hwpart(const char *ifname, int dev, int hwpart)
  56 {
  57         struct blk_desc *dev_desc;
  58         int ret;
  59
  60         dev_desc = blk_get_devnum_by_typename(ifname, dev);
  61         if (!dev_desc) {
  62                 debug("%s: No device for iface '%s', dev %d\n", __func__,
  63                       ifname, dev);
  64                 return NULL;
  65         }
  66         ret = blk_dselect_hwpart(dev_desc, hwpart);
  67         if (ret) {
  68                 debug("%s: Failed to select h/w partition: err-%d\n", __func__,
  69                       ret);
  70                 return NULL;
  71         }
  72
  73         return dev_desc;
  74 }
  75
  76 struct blk_desc *blk_get_dev(const char *ifname, int dev)
  77 {
  78         return get_dev_hwpart(ifname, dev, 0);
  79 }
  80 #else
  81 struct blk_desc *get_dev_hwpart(const char *ifname, int dev, int hwpart)
  82 {
  83         return NULL;
  84 }
  85
  86 struct blk_desc *blk_get_dev(const char *ifname, int dev)
  87 {
  88         return NULL;
  89 }
  90 #endif
  91
  92 #ifdef CONFIG_HAVE_BLOCK_DEVICE
  93
  94 /* ------------------------------------------------------------------------- */
  95 /*
  96  * reports device info to the user
  97  */
  98
  99 #ifdef CONFIG_LBA48
 100 typedef uint64_t lba512_t;
 101 #else
 102 typedef lbaint_t lba512_t;
 103 #endif
 104
 105 /*
 106  * Overflowless variant of (block_count * mul_by / div_by)
 107  * when div_by > mul_by
 108  */
 109 static lba512_t lba512_muldiv(lba512_t block_count, lba512_t mul_by, lba512_t div_by)
 110 {
 111         lba512_t bc_quot, bc_rem;
 112
 113         /* x * m / d == x / d * m + (x % d) * m / d */
 114         bc_quot = block_count / div_by;
 115         bc_rem  = block_count - div_by * bc_quot;
 116         return bc_quot * mul_by + (bc_rem * mul_by) / div_by;
 117 }
 118
 119 void dev_print (struct blk_desc *dev_desc)
 120 {
 121         lba512_t lba512; /* number of blocks if 512bytes block size */
 122
 123         if (dev_desc->type == DEV_TYPE_UNKNOWN) {
 124                 puts ("not available\n");
 125                 return;
 126         }
 127
 128         switch (dev_desc->if_type) {
 129         case IF_TYPE_SCSI:
 130                 printf ("(%d:%d) Vendor: %s Prod.: %s Rev: %s\n",
 131                         dev_desc->target,dev_desc->lun,
 132                         dev_desc->vendor,
 133                         dev_desc->product,
 134                         dev_desc->revision);
 135                 break;
 136         case IF_TYPE_ATAPI:
 137         case IF_TYPE_IDE:
 138         case IF_TYPE_SATA:
 139                 printf ("Model: %s Firm: %s Ser#: %s\n",
 140                         dev_desc->vendor,
 141                         dev_desc->revision,
 142                         dev_desc->product);
 143                 break;
 144         case IF_TYPE_SD:
 145         case IF_TYPE_MMC:
 146         case IF_TYPE_USB:
 147         case IF_TYPE_NVME:
 148                 printf ("Vendor: %s Rev: %s Prod: %s\n",
 149                         dev_desc->vendor,
 150                         dev_desc->revision,
 151                         dev_desc->product);
 152                 break;
 153         case IF_TYPE_DOC:
 154                 puts("device type DOC\n");
 155                 return;
 156         case IF_TYPE_UNKNOWN:
 157                 puts("device type unknown\n");
 158                 return;
 159         default:
 160                 printf("Unhandled device type: %i\n", dev_desc->if_type);
 161                 return;
 162         }
 163         puts ("            Type: ");
 164         if (dev_desc->removable)
 165                 puts ("Removable ");
 166         switch (dev_desc->type & 0x1F) {
 167         case DEV_TYPE_HARDDISK:
 168                 puts ("Hard Disk");
 169                 break;
 170         case DEV_TYPE_CDROM:
 171                 puts ("CD ROM");
 172                 break;
 173         case DEV_TYPE_OPDISK:
 174                 puts ("Optical Device");
 175                 break;
 176         case DEV_TYPE_TAPE:
 177                 puts ("Tape");
 178                 break;
 179         default:
 180                 printf ("# %02X #", dev_desc->type & 0x1F);
 181                 break;
 182         }
 183         puts ("\n");
 184         if (dev_desc->lba > 0L && dev_desc->blksz > 0L) {
 185                 ulong mb, mb_quot, mb_rem, gb, gb_quot, gb_rem;
 186                 lbaint_t lba;
 187
 188                 lba = dev_desc->lba;
 189
 190                 lba512 = (lba * (dev_desc->blksz/512));
 191                 /* round to 1 digit */
 192                 /* 2048 = (1024 * 1024) / 512 MB */
 193                 mb = lba512_muldiv(lba512, 10, 2048);
 194
 195                 mb_quot = mb / 10;
 196                 mb_rem  = mb - (10 * mb_quot);
 197
 198                 gb = mb / 1024;
 199                 gb_quot = gb / 10;
 200                 gb_rem  = gb - (10 * gb_quot);
 201 #ifdef CONFIG_LBA48
 202                 if (dev_desc->lba48)
 203                         printf ("            Supports 48-bit addressing\n");
 204 #endif
 205 #if defined(CONFIG_SYS_64BIT_LBA)
 206                 printf ("            Capacity: %lu.%lu MB = %lu.%lu GB (%llu x %lu)\n",
 207                         mb_quot, mb_rem,
 208                         gb_quot, gb_rem,
 209                         lba,
 210                         dev_desc->blksz);
 211 #else
 212                 printf ("            Capacity: %lu.%lu MB = %lu.%lu GB (%lu x %lu)\n",
 213                         mb_quot, mb_rem,
 214                         gb_quot, gb_rem,
 215                         (ulong)lba,
 216                         dev_desc->blksz);
 217 #endif
 218         } else {
 219                 puts ("            Capacity: not available\n");
 220         }
 221 }
 222 #endif
 223
 224 #ifdef CONFIG_HAVE_BLOCK_DEVICE
 225
 226 void part_init(struct blk_desc *dev_desc)
 227 {
 228         struct part_driver *drv =
 229                 ll_entry_start(struct part_driver, part_driver);
 230         const int n_ents = ll_entry_count(struct part_driver, part_driver);
 231         struct part_driver *entry;
 232
 233         blkcache_invalidate(dev_desc->if_type, dev_desc->devnum);
 234
 235         dev_desc->part_type = PART_TYPE_UNKNOWN;
 236         for (entry = drv; entry != drv + n_ents; entry++) {
 237                 int ret;
 238
 239                 ret = entry->test(dev_desc);
 240                 debug("%s: try '%s': ret=%d\n", __func__, entry->name, ret);
 241                 if (!ret) {
 242                         dev_desc->part_type = entry->part_type;
 243                         break;
 244                 }
 245         }
 246 }
 247
 248 static void print_part_header(const char *type, struct blk_desc *dev_desc)
 249 {
 250 #if CONFIG_IS_ENABLED(MAC_PARTITION) || \
 251         CONFIG_IS_ENABLED(DOS_PARTITION) || \
 252         CONFIG_IS_ENABLED(ISO_PARTITION) || \
 253         CONFIG_IS_ENABLED(AMIGA_PARTITION) || \
 254         CONFIG_IS_ENABLED(EFI_PARTITION)
 255         puts ("\nPartition Map for ");
 256         switch (dev_desc->if_type) {
 257         case IF_TYPE_IDE:
 258                 puts ("IDE");
 259                 break;
 260         case IF_TYPE_SATA:
 261                 puts ("SATA");
 262                 break;
 263         case IF_TYPE_SCSI:
 264                 puts ("SCSI");
 265                 break;
 266         case IF_TYPE_ATAPI:
 267                 puts ("ATAPI");
 268                 break;
 269         case IF_TYPE_USB:
 270                 puts ("USB");
 271                 break;
 272         case IF_TYPE_DOC:
 273                 puts ("DOC");
 274                 break;
 275         case IF_TYPE_MMC:
 276                 puts ("MMC");
 277                 break;
 278         case IF_TYPE_HOST:
 279                 puts ("HOST");
 280                 break;
 281         case IF_TYPE_NVME:
 282                 puts ("NVMe");
 283                 break;
 284         default:
 285                 puts ("UNKNOWN");
 286                 break;
 287         }
 288         printf (" device %d  --   Partition Type: %s\n\n",
 289                         dev_desc->devnum, type);
 290 #endif /* any CONFIG_..._PARTITION */
 291 }
 292
 293 void part_print(struct blk_desc *dev_desc)
 294 {
 295         struct part_driver *drv;
 296
 297         drv = part_driver_lookup_type(dev_desc);
 298         if (!drv) {
 299                 printf("## Unknown partition table type %x\n",
 300                        dev_desc->part_type);
 301                 return;
 302         }
 303
 304         PRINTF("## Testing for valid %s partition ##\n", drv->name);
 305         print_part_header(drv->name, dev_desc);
 306         if (drv->print)
 307                 drv->print(dev_desc);
 308 }
 309
 310 #endif /* CONFIG_HAVE_BLOCK_DEVICE */
 311
 312 int part_get_info(struct blk_desc *dev_desc, int part,
 313                        disk_partition_t *info)
 314 {
 315 #ifdef CONFIG_HAVE_BLOCK_DEVICE
 316         struct part_driver *drv;
 317
 318 #if CONFIG_IS_ENABLED(PARTITION_UUIDS)
 319         /* The common case is no UUID support */
 320         info->uuid[0] = 0;
 321 #endif
 322 #ifdef CONFIG_PARTITION_TYPE_GUID
 323         info->type_guid[0] = 0;
 324 #endif
 325
 326         drv = part_driver_lookup_type(dev_desc);
 327         if (!drv) {
 328                 debug("## Unknown partition table type %x\n",
 329                       dev_desc->part_type);
 330                 return -EPROTONOSUPPORT;
 331         }
 332         if (!drv->get_info) {
 333                 PRINTF("## Driver %s does not have the get_info() method\n",
 334                        drv->name);
 335                 return -ENOSYS;
 336         }
 337         if (drv->get_info(dev_desc, part, info) == 0) {
 338                 PRINTF("## Valid %s partition found ##\n", drv->name);
 339                 return 0;
 340         }
 341 #endif /* CONFIG_HAVE_BLOCK_DEVICE */
 342
 343         return -1;
 344 }
 345
 346 int part_get_info_whole_disk(struct blk_desc *dev_desc, disk_partition_t *info)
 347 {
 348         info->start = 0;
 349         info->size = dev_desc->lba;
 350         info->blksz = dev_desc->blksz;
 351         info->bootable = 0;
 352         strcpy((char *)info->type, BOOT_PART_TYPE);
 353         strcpy((char *)info->name, "Whole Disk");
 354 #if CONFIG_IS_ENABLED(PARTITION_UUIDS)
 355         info->uuid[0] = 0;
 356 #endif
 357 #ifdef CONFIG_PARTITION_TYPE_GUID
 358         info->type_guid[0] = 0;
 359 #endif
 360
 361         return 0;
 362 }
 363
 364 int blk_get_device_by_str(const char *ifname, const char *dev_hwpart_str,
 365                           struct blk_desc **dev_desc)
 366 {
 367         char *ep;
 368         char *dup_str = NULL;
 369         const char *dev_str, *hwpart_str;
 370         int dev, hwpart;
 371
 372         hwpart_str = strchr(dev_hwpart_str, '.');
 373         if (hwpart_str) {
 374                 dup_str = strdup(dev_hwpart_str);
 375                 dup_str[hwpart_str - dev_hwpart_str] = 0;
 376                 dev_str = dup_str;
 377                 hwpart_str++;
 378         } else {
 379                 dev_str = dev_hwpart_str;
 380                 hwpart = 0;
 381         }
 382
 383         dev = simple_strtoul(dev_str, &ep, 16);
 384         if (*ep) {
 385                 printf("** Bad device specification %s %s **\n",
 386                        ifname, dev_str);
 387                 dev = -EINVAL;
 388                 goto cleanup;
 389         }
 390
 391         if (hwpart_str) {
 392                 hwpart = simple_strtoul(hwpart_str, &ep, 16);
 393                 if (*ep) {
 394                         printf("** Bad HW partition specification %s %s **\n",
 395                             ifname, hwpart_str);
 396                         dev = -EINVAL;
 397                         goto cleanup;
 398                 }
 399         }
 400
 401         *dev_desc = get_dev_hwpart(ifname, dev, hwpart);
 402         if (!(*dev_desc) || ((*dev_desc)->type == DEV_TYPE_UNKNOWN)) {
 403                 debug("** Bad device %s %s **\n", ifname, dev_hwpart_str);
 404                 dev = -ENOENT;
 405                 goto cleanup;
 406         }
 407
 408 #ifdef CONFIG_HAVE_BLOCK_DEVICE
 409         /*
 410          * Updates the partition table for the specified hw partition.
 411          * Does not need to be done for hwpart 0 since it is default and
 412          * already loaded.
 413          */
 414         if(hwpart != 0)
 415                 part_init(*dev_desc);
 416 #endif
 417
 418 cleanup:
 419         free(dup_str);
 420         return dev;
 421 }
 422
 423 #define PART_UNSPECIFIED -2
 424 #define PART_AUTO -1
 425 int blk_get_device_part_str(const char *ifname, const char *dev_part_str,
 426                              struct blk_desc **dev_desc,
 427                              disk_partition_t *info, int allow_whole_dev)
 428 {
 429         int ret = -1;
 430         const char *part_str;
 431         char *dup_str = NULL;
 432         const char *dev_str;
 433         int dev;
 434         char *ep;
 435         int p;
 436         int part;
 437         disk_partition_t tmpinfo;
 438
 439 #ifdef CONFIG_SANDBOX
 440         /*
 441          * Special-case a pseudo block device "hostfs", to allow access to the
 442          * host's own filesystem.
 443          */
 444         if (0 == strcmp(ifname, "hostfs")) {
 445                 *dev_desc = NULL;
 446                 info->start = 0;
 447                 info->size = 0;
 448                 info->blksz = 0;
 449                 info->bootable = 0;
 450                 strcpy((char *)info->type, BOOT_PART_TYPE);
 451                 strcpy((char *)info->name, "Sandbox host");
 452 #if CONFIG_IS_ENABLED(PARTITION_UUIDS)
 453                 info->uuid[0] = 0;
 454 #endif
 455 #ifdef CONFIG_PARTITION_TYPE_GUID
 456                 info->type_guid[0] = 0;
 457 #endif
 458
 459                 return 0;
 460         }
 461 #endif
 462
 463 #ifdef CONFIG_CMD_UBIFS
 464         /*
 465          * Special-case ubi, ubi goes through a mtd, rathen then through
 466          * a regular block device.
 467          */
 468         if (0 == strcmp(ifname, "ubi")) {
 469                 if (!ubifs_is_mounted()) {
 470                         printf("UBIFS not mounted, use ubifsmount to mount volume first!\n");
 471                         return -1;
 472                 }
 473
 474                 *dev_desc = NULL;
 475                 memset(info, 0, sizeof(*info));
 476                 strcpy((char *)info->type, BOOT_PART_TYPE);
 477                 strcpy((char *)info->name, "UBI");
 478 #if CONFIG_IS_ENABLED(PARTITION_UUIDS)
 479                 info->uuid[0] = 0;
 480 #endif
 481                 return 0;
 482         }
 483 #endif
 484
 485         /* If no dev_part_str, use bootdevice environment variable */
 486         if (!dev_part_str || !strlen(dev_part_str) ||
 487             !strcmp(dev_part_str, "-"))
 488                 dev_part_str = env_get("bootdevice");
 489
 490         /* If still no dev_part_str, it's an error */
 491         if (!dev_part_str) {
 492                 printf("** No device specified **\n");
 493                 goto cleanup;
 494         }
 495
 496         /* Separate device and partition ID specification */
 497         part_str = strchr(dev_part_str, ':');
 498         if (part_str) {
 499                 dup_str = strdup(dev_part_str);
 500                 dup_str[part_str - dev_part_str] = 0;
 501                 dev_str = dup_str;
 502                 part_str++;
 503         } else {
 504                 dev_str = dev_part_str;
 505         }
 506
 507         /* Look up the device */
 508         dev = blk_get_device_by_str(ifname, dev_str, dev_desc);
 509         if (dev < 0)
 510                 goto cleanup;
 511
 512         /* Convert partition ID string to number */
 513         if (!part_str || !*part_str) {
 514                 part = PART_UNSPECIFIED;
 515         } else if (!strcmp(part_str, "auto")) {
 516                 part = PART_AUTO;
 517         } else {
 518                 /* Something specified -> use exactly that */
 519                 part = (int)simple_strtoul(part_str, &ep, 16);
 520                 /*
 521                  * Less than whole string converted,
 522                  * or request for whole device, but caller requires partition.
 523                  */
 524                 if (*ep || (part == 0 && !allow_whole_dev)) {
 525                         printf("** Bad partition specification %s %s **\n",
 526                             ifname, dev_part_str);
 527                         goto cleanup;
 528                 }
 529         }
 530
 531         /*
 532          * No partition table on device,
 533          * or user requested partition 0 (entire device).
 534          */
 535         if (((*dev_desc)->part_type == PART_TYPE_UNKNOWN) ||
 536             (part == 0)) {
 537                 if (!(*dev_desc)->lba) {
 538                         printf("** Bad device size - %s %s **\n", ifname,
 539                                dev_str);
 540                         goto cleanup;
 541                 }
 542
 543                 /*
 544                  * If user specified a partition ID other than 0,
 545                  * or the calling command only accepts partitions,
 546                  * it's an error.
 547                  */
 548                 if ((part > 0) || (!allow_whole_dev)) {
 549                         printf("** No partition table - %s %s **\n", ifname,
 550                                dev_str);
 551                         goto cleanup;
 552                 }
 553
 554                 (*dev_desc)->log2blksz = LOG2((*dev_desc)->blksz);
 555
 556                 part_get_info_whole_disk(*dev_desc, info);
 557
 558                 ret = 0;
 559                 goto cleanup;
 560         }
 561
 562         /*
 563          * Now there's known to be a partition table,
 564          * not specifying a partition means to pick partition 1.
 565          */
 566         if (part == PART_UNSPECIFIED)
 567                 part = 1;
 568
 569         /*
 570          * If user didn't specify a partition number, or did specify something
 571          * other than "auto", use that partition number directly.
 572          */
 573         if (part != PART_AUTO) {
 574                 ret = part_get_info(*dev_desc, part, info);
 575                 if (ret) {
 576                         printf("** Invalid partition %d **\n", part);
 577                         goto cleanup;
 578                 }
 579         } else {
 580                 /*
 581                  * Find the first bootable partition.
 582                  * If none are bootable, fall back to the first valid partition.
 583                  */
 584                 part = 0;
 585                 for (p = 1; p <= MAX_SEARCH_PARTITIONS; p++) {
 586                         ret = part_get_info(*dev_desc, p, info);
 587                         if (ret)
 588                                 continue;
 589
 590                         /*
 591                          * First valid partition, or new better partition?
 592                          * If so, save partition ID.
 593                          */
 594                         if (!part || info->bootable)
 595                                 part = p;
 596
 597                         /* Best possible partition? Stop searching. */
 598                         if (info->bootable)
 599                                 break;
 600
 601                         /*
 602                          * We now need to search further for best possible.
 603                          * If we what we just queried was the best so far,
 604                          * save the info since we over-write it next loop.
 605                          */
 606                         if (part == p)
 607                                 tmpinfo = *info;
 608                 }
 609                 /* If we found any acceptable partition */
 610                 if (part) {
 611                         /*
 612                          * If we searched all possible partition IDs,
 613                          * return the first valid partition we found.
 614                          */
 615                         if (p == MAX_SEARCH_PARTITIONS + 1)
 616                                 *info = tmpinfo;
 617                 } else {
 618                         printf("** No valid partitions found **\n");
 619                         ret = -1;
 620                         goto cleanup;
 621                 }
 622         }
 623         if (strncmp((char *)info->type, BOOT_PART_TYPE, sizeof(info->type)) != 0) {
 624                 printf("** Invalid partition type \"%.32s\""
 625                         " (expect \"" BOOT_PART_TYPE "\")\n",
 626                         info->type);
 627                 ret  = -1;
 628                 goto cleanup;
 629         }
 630
 631         (*dev_desc)->log2blksz = LOG2((*dev_desc)->blksz);
 632
 633         ret = part;
 634         goto cleanup;
 635
 636 cleanup:
 637         free(dup_str);
 638         return ret;
 639 }
 640
 641 int part_get_info_by_name_type(struct blk_desc *dev_desc, const char *name,
 642                                disk_partition_t *info, int part_type)
 643 {
 644         struct part_driver *part_drv;
 645         int ret;
 646         int i;
 647
 648         part_drv = part_driver_lookup_type(dev_desc);
 649         if (!part_drv)
 650                 return -1;
 651         for (i = 1; i < part_drv->max_entries; i++) {
 652                 ret = part_drv->get_info(dev_desc, i, info);
 653                 if (ret != 0) {
 654                         /* no more entries in table */
 655                         break;
 656                 }
 657                 if (strcmp(name, (const char *)info->name) == 0) {
 658                         /* matched */
 659                         return i;
 660                 }
 661         }
 662
 663         return -1;
 664 }
 665
 666 int part_get_info_by_name(struct blk_desc *dev_desc, const char *name,
 667                           disk_partition_t *info)
 668 {
 669         return part_get_info_by_name_type(dev_desc, name, info, PART_TYPE_ALL);
 670 }
 671
 672 void part_set_generic_name(const struct blk_desc *dev_desc,
 673         int part_num, char *name)
 674 {
 675         char *devtype;
 676
 677         switch (dev_desc->if_type) {
 678         case IF_TYPE_IDE:
 679         case IF_TYPE_SATA:
 680         case IF_TYPE_ATAPI:
 681                 devtype = "hd";
 682                 break;
 683         case IF_TYPE_SCSI:
 684                 devtype = "sd";
 685                 break;
 686         case IF_TYPE_USB:
 687                 devtype = "usbd";
 688                 break;
 689         case IF_TYPE_DOC:
 690                 devtype = "docd";
 691                 break;
 692         case IF_TYPE_MMC:
 693         case IF_TYPE_SD:
 694                 devtype = "mmcsd";
 695                 break;
 696         default:
 697                 devtype = "xx";
 698                 break;
 699         }
 700
 701         sprintf(name, "%s%c%d", devtype, 'a' + dev_desc->devnum, part_num);
 702 }