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 <blk.h>
   9 #include <command.h>
  10 #include <env.h>
  11 #include <errno.h>
  12 #include <ide.h>
  13 #include <log.h>
  14 #include <malloc.h>
  15 #include <part.h>
  16 #include <ubifs_uboot.h>
  17
  18 #undef  PART_DEBUG
  19
  20 #ifdef  PART_DEBUG
  21 #define PRINTF(fmt,args...)     printf (fmt ,##args)
  22 #else
  23 #define PRINTF(fmt,args...)
  24 #endif
  25
  26 /* Check all partition types */
  27 #define PART_TYPE_ALL           -1
  28
  29 static struct part_driver *part_driver_lookup_type(struct blk_desc *dev_desc)
  30 {
  31         struct part_driver *drv =
  32                 ll_entry_start(struct part_driver, part_driver);
  33         const int n_ents = ll_entry_count(struct part_driver, part_driver);
  34         struct part_driver *entry;
  35
  36         if (dev_desc->part_type == PART_TYPE_UNKNOWN) {
  37                 for (entry = drv; entry != drv + n_ents; entry++) {
  38                         int ret;
  39
  40                         ret = entry->test(dev_desc);
  41                         if (!ret) {
  42                                 dev_desc->part_type = entry->part_type;
  43                                 return entry;
  44                         }
  45                 }
  46         } else {
  47                 for (entry = drv; entry != drv + n_ents; entry++) {
  48                         if (dev_desc->part_type == entry->part_type)
  49                                 return entry;
  50                 }
  51         }
  52
  53         /* Not found */
  54         return NULL;
  55 }
  56
  57 static struct blk_desc *get_dev_hwpart(const char *ifname, int dev, int hwpart)
  58 {
  59         struct blk_desc *dev_desc;
  60         int ret;
  61
  62         if (!blk_enabled())
  63                 return NULL;
  64         dev_desc = blk_get_devnum_by_uclass_idname(ifname, dev);
  65         if (!dev_desc) {
  66                 debug("%s: No device for iface '%s', dev %d\n", __func__,
  67                       ifname, dev);
  68                 return NULL;
  69         }
  70         ret = blk_dselect_hwpart(dev_desc, hwpart);
  71         if (ret) {
  72                 debug("%s: Failed to select h/w partition: err-%d\n", __func__,
  73                       ret);
  74                 return NULL;
  75         }
  76
  77         return dev_desc;
  78 }
  79
  80 struct blk_desc *blk_get_dev(const char *ifname, int dev)
  81 {
  82         if (!blk_enabled())
  83                 return NULL;
  84
  85         return get_dev_hwpart(ifname, dev, 0);
  86 }
  87
  88 /* ------------------------------------------------------------------------- */
  89 /*
  90  * reports device info to the user
  91  */
  92
  93 #ifdef CONFIG_LBA48
  94 typedef uint64_t lba512_t;
  95 #else
  96 typedef lbaint_t lba512_t;
  97 #endif
  98
  99 /*
 100  * Overflowless variant of (block_count * mul_by / 2**right_shift)
 101  * when 2**right_shift > mul_by
 102  */
 103 static lba512_t lba512_muldiv(lba512_t block_count, lba512_t mul_by,
 104                               int right_shift)
 105 {
 106         lba512_t bc_quot, bc_rem;
 107
 108         /* x * m / d == x / d * m + (x % d) * m / d */
 109         bc_quot = block_count >> right_shift;
 110         bc_rem  = block_count - (bc_quot << right_shift);
 111         return bc_quot * mul_by + ((bc_rem * mul_by) >> right_shift);
 112 }
 113
 114 void dev_print(struct blk_desc *dev_desc)
 115 {
 116         lba512_t lba512; /* number of blocks if 512bytes block size */
 117
 118         if (dev_desc->type == DEV_TYPE_UNKNOWN) {
 119                 puts ("not available\n");
 120                 return;
 121         }
 122
 123         switch (dev_desc->uclass_id) {
 124         case UCLASS_SCSI:
 125                 printf ("(%d:%d) Vendor: %s Prod.: %s Rev: %s\n",
 126                         dev_desc->target,dev_desc->lun,
 127                         dev_desc->vendor,
 128                         dev_desc->product,
 129                         dev_desc->revision);
 130                 break;
 131         case UCLASS_IDE:
 132         case UCLASS_AHCI:
 133                 printf ("Model: %s Firm: %s Ser#: %s\n",
 134                         dev_desc->vendor,
 135                         dev_desc->revision,
 136                         dev_desc->product);
 137                 break;
 138         case UCLASS_MMC:
 139         case UCLASS_USB:
 140         case UCLASS_NVME:
 141         case UCLASS_PVBLOCK:
 142         case UCLASS_HOST:
 143                 printf ("Vendor: %s Rev: %s Prod: %s\n",
 144                         dev_desc->vendor,
 145                         dev_desc->revision,
 146                         dev_desc->product);
 147                 break;
 148         case UCLASS_VIRTIO:
 149                 printf("%s VirtIO Block Device\n", dev_desc->vendor);
 150                 break;
 151         case UCLASS_EFI_MEDIA:
 152                 printf("EFI media Block Device %d\n", dev_desc->devnum);
 153                 break;
 154         case UCLASS_INVALID:
 155                 puts("device type unknown\n");
 156                 return;
 157         default:
 158                 printf("Unhandled device type: %i\n", dev_desc->uclass_id);
 159                 return;
 160         }
 161         puts ("            Type: ");
 162         if (dev_desc->removable)
 163                 puts ("Removable ");
 164         switch (dev_desc->type & 0x1F) {
 165         case DEV_TYPE_HARDDISK:
 166                 puts ("Hard Disk");
 167                 break;
 168         case DEV_TYPE_CDROM:
 169                 puts ("CD ROM");
 170                 break;
 171         case DEV_TYPE_OPDISK:
 172                 puts ("Optical Device");
 173                 break;
 174         case DEV_TYPE_TAPE:
 175                 puts ("Tape");
 176                 break;
 177         default:
 178                 printf ("# %02X #", dev_desc->type & 0x1F);
 179                 break;
 180         }
 181         puts ("\n");
 182         if (dev_desc->lba > 0L && dev_desc->blksz > 0L) {
 183                 ulong mb, mb_quot, mb_rem, gb, gb_quot, gb_rem;
 184                 lbaint_t lba;
 185
 186                 lba = dev_desc->lba;
 187
 188                 lba512 = (lba * (dev_desc->blksz/512));
 189                 /* round to 1 digit */
 190                 /* 2048 = (1024 * 1024) / 512 MB */
 191                 mb = lba512_muldiv(lba512, 10, 11);
 192
 193                 mb_quot = mb / 10;
 194                 mb_rem  = mb - (10 * mb_quot);
 195
 196                 gb = mb / 1024;
 197                 gb_quot = gb / 10;
 198                 gb_rem  = gb - (10 * gb_quot);
 199 #ifdef CONFIG_LBA48
 200                 if (dev_desc->lba48)
 201                         printf ("            Supports 48-bit addressing\n");
 202 #endif
 203 #if defined(CONFIG_SYS_64BIT_LBA)
 204                 printf ("            Capacity: %lu.%lu MB = %lu.%lu GB (%llu x %lu)\n",
 205                         mb_quot, mb_rem,
 206                         gb_quot, gb_rem,
 207                         lba,
 208                         dev_desc->blksz);
 209 #else
 210                 printf ("            Capacity: %lu.%lu MB = %lu.%lu GB (%lu x %lu)\n",
 211                         mb_quot, mb_rem,
 212                         gb_quot, gb_rem,
 213                         (ulong)lba,
 214                         dev_desc->blksz);
 215 #endif
 216         } else {
 217                 puts ("            Capacity: not available\n");
 218         }
 219 }
 220
 221 void part_init(struct blk_desc *dev_desc)
 222 {
 223         struct part_driver *drv =
 224                 ll_entry_start(struct part_driver, part_driver);
 225         const int n_ents = ll_entry_count(struct part_driver, part_driver);
 226         struct part_driver *entry;
 227
 228         blkcache_invalidate(dev_desc->uclass_id, dev_desc->devnum);
 229
 230         dev_desc->part_type = PART_TYPE_UNKNOWN;
 231         for (entry = drv; entry != drv + n_ents; entry++) {
 232                 int ret;
 233
 234                 ret = entry->test(dev_desc);
 235                 debug("%s: try '%s': ret=%d\n", __func__, entry->name, ret);
 236                 if (!ret) {
 237                         dev_desc->part_type = entry->part_type;
 238                         break;
 239                 }
 240         }
 241 }
 242
 243 static void print_part_header(const char *type, struct blk_desc *dev_desc)
 244 {
 245 #if CONFIG_IS_ENABLED(MAC_PARTITION) || \
 246         CONFIG_IS_ENABLED(DOS_PARTITION) || \
 247         CONFIG_IS_ENABLED(ISO_PARTITION) || \
 248         CONFIG_IS_ENABLED(AMIGA_PARTITION) || \
 249         CONFIG_IS_ENABLED(EFI_PARTITION)
 250         puts ("\nPartition Map for ");
 251         switch (dev_desc->uclass_id) {
 252         case UCLASS_IDE:
 253                 puts ("IDE");
 254                 break;
 255         case UCLASS_AHCI:
 256                 puts ("SATA");
 257                 break;
 258         case UCLASS_SCSI:
 259                 puts ("SCSI");
 260                 break;
 261         case UCLASS_USB:
 262                 puts ("USB");
 263                 break;
 264         case UCLASS_MMC:
 265                 puts ("MMC");
 266                 break;
 267         case UCLASS_HOST:
 268                 puts ("HOST");
 269                 break;
 270         case UCLASS_NVME:
 271                 puts ("NVMe");
 272                 break;
 273         case UCLASS_PVBLOCK:
 274                 puts("PV BLOCK");
 275                 break;
 276         case UCLASS_VIRTIO:
 277                 puts("VirtIO");
 278                 break;
 279         case UCLASS_EFI_MEDIA:
 280                 puts("EFI");
 281                 break;
 282         default:
 283                 puts("UNKNOWN");
 284                 break;
 285         }
 286         printf (" device %d  --   Partition Type: %s\n\n",
 287                         dev_desc->devnum, type);
 288 #endif /* any CONFIG_..._PARTITION */
 289 }
 290
 291 void part_print(struct blk_desc *dev_desc)
 292 {
 293         struct part_driver *drv;
 294
 295         drv = part_driver_lookup_type(dev_desc);
 296         if (!drv) {
 297                 printf("## Unknown partition table type %x\n",
 298                        dev_desc->part_type);
 299                 return;
 300         }
 301
 302         PRINTF("## Testing for valid %s partition ##\n", drv->name);
 303         print_part_header(drv->name, dev_desc);
 304         if (drv->print)
 305                 drv->print(dev_desc);
 306 }
 307
 308 int part_get_info(struct blk_desc *dev_desc, int part,
 309                        struct disk_partition *info)
 310 {
 311         struct part_driver *drv;
 312
 313         if (blk_enabled()) {
 314 #if CONFIG_IS_ENABLED(PARTITION_UUIDS)
 315                 /* The common case is no UUID support */
 316                 info->uuid[0] = 0;
 317 #endif
 318 #ifdef CONFIG_PARTITION_TYPE_GUID
 319                 info->type_guid[0] = 0;
 320 #endif
 321
 322                 drv = part_driver_lookup_type(dev_desc);
 323                 if (!drv) {
 324                         debug("## Unknown partition table type %x\n",
 325                               dev_desc->part_type);
 326                         return -EPROTONOSUPPORT;
 327                 }
 328                 if (!drv->get_info) {
 329                         PRINTF("## Driver %s does not have the get_info() method\n",
 330                                drv->name);
 331                         return -ENOSYS;
 332                 }
 333                 if (drv->get_info(dev_desc, part, info) == 0) {
 334                         PRINTF("## Valid %s partition found ##\n", drv->name);
 335                         return 0;
 336                 }
 337         }
 338
 339         return -ENOENT;
 340 }
 341
 342 int part_get_info_whole_disk(struct blk_desc *dev_desc,
 343                              struct disk_partition *info)
 344 {
 345         info->start = 0;
 346         info->size = dev_desc->lba;
 347         info->blksz = dev_desc->blksz;
 348         info->bootable = 0;
 349         strcpy((char *)info->type, BOOT_PART_TYPE);
 350         strcpy((char *)info->name, "Whole Disk");
 351 #if CONFIG_IS_ENABLED(PARTITION_UUIDS)
 352         info->uuid[0] = 0;
 353 #endif
 354 #ifdef CONFIG_PARTITION_TYPE_GUID
 355         info->type_guid[0] = 0;
 356 #endif
 357
 358         return 0;
 359 }
 360
 361 int blk_get_device_by_str(const char *ifname, const char *dev_hwpart_str,
 362                           struct blk_desc **dev_desc)
 363 {
 364         char *ep;
 365         char *dup_str = NULL;
 366         const char *dev_str, *hwpart_str;
 367         int dev, hwpart;
 368
 369         hwpart_str = strchr(dev_hwpart_str, '.');
 370         if (hwpart_str) {
 371                 dup_str = strdup(dev_hwpart_str);
 372                 dup_str[hwpart_str - dev_hwpart_str] = 0;
 373                 dev_str = dup_str;
 374                 hwpart_str++;
 375         } else {
 376                 dev_str = dev_hwpart_str;
 377                 hwpart = 0;
 378         }
 379
 380         dev = hextoul(dev_str, &ep);
 381         if (*ep) {
 382                 printf("** Bad device specification %s %s **\n",
 383                        ifname, dev_str);
 384                 dev = -EINVAL;
 385                 goto cleanup;
 386         }
 387
 388         if (hwpart_str) {
 389                 hwpart = hextoul(hwpart_str, &ep);
 390                 if (*ep) {
 391                         printf("** Bad HW partition specification %s %s **\n",
 392                             ifname, hwpart_str);
 393                         dev = -EINVAL;
 394                         goto cleanup;
 395                 }
 396         }
 397
 398         *dev_desc = get_dev_hwpart(ifname, dev, hwpart);
 399         if (!(*dev_desc) || ((*dev_desc)->type == DEV_TYPE_UNKNOWN)) {
 400                 debug("** Bad device %s %s **\n", ifname, dev_hwpart_str);
 401                 dev = -ENODEV;
 402                 goto cleanup;
 403         }
 404
 405         if (blk_enabled()) {
 406                 /*
 407                  * Updates the partition table for the specified hw partition.
 408                  * Always should be done, otherwise hw partition 0 will return
 409                  * stale data after displaying a non-zero hw partition.
 410                  */
 411                 if ((*dev_desc)->uclass_id == UCLASS_MMC)
 412                         part_init(*dev_desc);
 413         }
 414
 415 cleanup:
 416         free(dup_str);
 417         return dev;
 418 }
 419
 420 #define PART_UNSPECIFIED -2
 421 #define PART_AUTO -1
 422 int blk_get_device_part_str(const char *ifname, const char *dev_part_str,
 423                              struct blk_desc **dev_desc,
 424                              struct disk_partition *info, int allow_whole_dev)
 425 {
 426         int ret;
 427         const char *part_str;
 428         char *dup_str = NULL;
 429         const char *dev_str;
 430         int dev;
 431         char *ep;
 432         int p;
 433         int part;
 434         struct disk_partition tmpinfo;
 435
 436         *dev_desc = NULL;
 437         memset(info, 0, sizeof(*info));
 438
 439 #if IS_ENABLED(CONFIG_SANDBOX) || IS_ENABLED(CONFIG_SEMIHOSTING)
 440         /*
 441          * Special-case a pseudo block device "hostfs", to allow access to the
 442          * host's own filesystem.
 443          */
 444         if (!strcmp(ifname, "hostfs")) {
 445                 strcpy((char *)info->type, BOOT_PART_TYPE);
 446                 strcpy((char *)info->name, "Host filesystem");
 447
 448                 return 0;
 449         }
 450 #endif
 451
 452 #if IS_ENABLED(CONFIG_CMD_UBIFS) && !IS_ENABLED(CONFIG_SPL_BUILD)
 453         /*
 454          * Special-case ubi, ubi goes through a mtd, rather than through
 455          * a regular block device.
 456          */
 457         if (!strcmp(ifname, "ubi")) {
 458                 if (!ubifs_is_mounted()) {
 459                         printf("UBIFS not mounted, use ubifsmount to mount volume first!\n");
 460                         return -EINVAL;
 461                 }
 462
 463                 strcpy((char *)info->type, BOOT_PART_TYPE);
 464                 strcpy((char *)info->name, "UBI");
 465                 return 0;
 466         }
 467 #endif
 468
 469         /* If no dev_part_str, use bootdevice environment variable */
 470         if (!dev_part_str || !strlen(dev_part_str) ||
 471             !strcmp(dev_part_str, "-"))
 472                 dev_part_str = env_get("bootdevice");
 473
 474         /* If still no dev_part_str, it's an error */
 475         if (!dev_part_str) {
 476                 printf("** No device specified **\n");
 477                 ret = -ENODEV;
 478                 goto cleanup;
 479         }
 480
 481         /* Separate device and partition ID specification */
 482         part_str = strchr(dev_part_str, ':');
 483         if (part_str) {
 484                 dup_str = strdup(dev_part_str);
 485                 dup_str[part_str - dev_part_str] = 0;
 486                 dev_str = dup_str;
 487                 part_str++;
 488         } else {
 489                 dev_str = dev_part_str;
 490         }
 491
 492         /* Look up the device */
 493         dev = blk_get_device_by_str(ifname, dev_str, dev_desc);
 494         if (dev < 0) {
 495                 printf("** Bad device specification %s %s **\n",
 496                        ifname, dev_str);
 497                 ret = dev;
 498                 goto cleanup;
 499         }
 500
 501         /* Convert partition ID string to number */
 502         if (!part_str || !*part_str) {
 503                 part = PART_UNSPECIFIED;
 504         } else if (!strcmp(part_str, "auto")) {
 505                 part = PART_AUTO;
 506         } else {
 507                 /* Something specified -> use exactly that */
 508                 part = (int)hextoul(part_str, &ep);
 509                 /*
 510                  * Less than whole string converted,
 511                  * or request for whole device, but caller requires partition.
 512                  */
 513                 if (*ep || (part == 0 && !allow_whole_dev)) {
 514                         printf("** Bad partition specification %s %s **\n",
 515                             ifname, dev_part_str);
 516                         ret = -ENOENT;
 517                         goto cleanup;
 518                 }
 519         }
 520
 521         /*
 522          * No partition table on device,
 523          * or user requested partition 0 (entire device).
 524          */
 525         if (((*dev_desc)->part_type == PART_TYPE_UNKNOWN) ||
 526             (part == 0)) {
 527                 if (!(*dev_desc)->lba) {
 528                         printf("** Bad device size - %s %s **\n", ifname,
 529                                dev_str);
 530                         ret = -EINVAL;
 531                         goto cleanup;
 532                 }
 533
 534                 /*
 535                  * If user specified a partition ID other than 0,
 536                  * or the calling command only accepts partitions,
 537                  * it's an error.
 538                  */
 539                 if ((part > 0) || (!allow_whole_dev)) {
 540                         printf("** No partition table - %s %s **\n", ifname,
 541                                dev_str);
 542                         ret = -EPROTONOSUPPORT;
 543                         goto cleanup;
 544                 }
 545
 546                 (*dev_desc)->log2blksz = LOG2((*dev_desc)->blksz);
 547
 548                 part_get_info_whole_disk(*dev_desc, info);
 549
 550                 ret = 0;
 551                 goto cleanup;
 552         }
 553
 554         /*
 555          * Now there's known to be a partition table,
 556          * not specifying a partition means to pick partition 1.
 557          */
 558         if (part == PART_UNSPECIFIED)
 559                 part = 1;
 560
 561         /*
 562          * If user didn't specify a partition number, or did specify something
 563          * other than "auto", use that partition number directly.
 564          */
 565         if (part != PART_AUTO) {
 566                 ret = part_get_info(*dev_desc, part, info);
 567                 if (ret) {
 568                         printf("** Invalid partition %d **\n", part);
 569                         goto cleanup;
 570                 }
 571         } else {
 572                 /*
 573                  * Find the first bootable partition.
 574                  * If none are bootable, fall back to the first valid partition.
 575                  */
 576                 part = 0;
 577                 for (p = 1; p <= MAX_SEARCH_PARTITIONS; p++) {
 578                         ret = part_get_info(*dev_desc, p, info);
 579                         if (ret)
 580                                 continue;
 581
 582                         /*
 583                          * First valid partition, or new better partition?
 584                          * If so, save partition ID.
 585                          */
 586                         if (!part || info->bootable)
 587                                 part = p;
 588
 589                         /* Best possible partition? Stop searching. */
 590                         if (info->bootable)
 591                                 break;
 592
 593                         /*
 594                          * We now need to search further for best possible.
 595                          * If we what we just queried was the best so far,
 596                          * save the info since we over-write it next loop.
 597                          */
 598                         if (part == p)
 599                                 tmpinfo = *info;
 600                 }
 601                 /* If we found any acceptable partition */
 602                 if (part) {
 603                         /*
 604                          * If we searched all possible partition IDs,
 605                          * return the first valid partition we found.
 606                          */
 607                         if (p == MAX_SEARCH_PARTITIONS + 1)
 608                                 *info = tmpinfo;
 609                 } else {
 610                         printf("** No valid partitions found **\n");
 611                         goto cleanup;
 612                 }
 613         }
 614         if (strncmp((char *)info->type, BOOT_PART_TYPE, sizeof(info->type)) != 0) {
 615                 printf("** Invalid partition type \"%.32s\""
 616                         " (expect \"" BOOT_PART_TYPE "\")\n",
 617                         info->type);
 618                 ret  = -EINVAL;
 619                 goto cleanup;
 620         }
 621
 622         (*dev_desc)->log2blksz = LOG2((*dev_desc)->blksz);
 623
 624         ret = part;
 625         goto cleanup;
 626
 627 cleanup:
 628         free(dup_str);
 629         return ret;
 630 }
 631
 632 int part_get_info_by_name_type(struct blk_desc *dev_desc, const char *name,
 633                                struct disk_partition *info, int part_type)
 634 {
 635         struct part_driver *part_drv;
 636         int ret;
 637         int i;
 638
 639         part_drv = part_driver_lookup_type(dev_desc);
 640         if (!part_drv)
 641                 return -1;
 642
 643         if (!part_drv->get_info) {
 644                 log_debug("## Driver %s does not have the get_info() method\n",
 645                           part_drv->name);
 646                 return -ENOSYS;
 647         }
 648
 649         for (i = 1; i < part_drv->max_entries; i++) {
 650                 ret = part_drv->get_info(dev_desc, i, info);
 651                 if (ret != 0) {
 652                         /* no more entries in table */
 653                         break;
 654                 }
 655                 if (strcmp(name, (const char *)info->name) == 0) {
 656                         /* matched */
 657                         return i;
 658                 }
 659         }
 660
 661         return -ENOENT;
 662 }
 663
 664 int part_get_info_by_name(struct blk_desc *dev_desc, const char *name,
 665                           struct disk_partition *info)
 666 {
 667         return part_get_info_by_name_type(dev_desc, name, info, PART_TYPE_ALL);
 668 }
 669
 670 /**
 671  * Get partition info from device number and partition name.
 672  *
 673  * Parse a device number and partition name string in the form of
 674  * "devicenum.hwpartnum#partition_name", for example "0.1#misc". devicenum and
 675  * hwpartnum are both optional, defaulting to 0. If the partition is found,
 676  * sets dev_desc and part_info accordingly with the information of the
 677  * partition with the given partition_name.
 678  *
 679  * @param[in] dev_iface Device interface
 680  * @param[in] dev_part_str Input string argument, like "0.1#misc"
 681  * @param[out] dev_desc Place to store the device description pointer
 682  * @param[out] part_info Place to store the partition information
 683  * Return: 0 on success, or a negative on error
 684  */
 685 static int part_get_info_by_dev_and_name(const char *dev_iface,
 686                                          const char *dev_part_str,
 687                                          struct blk_desc **dev_desc,
 688                                          struct disk_partition *part_info)
 689 {
 690         char *dup_str = NULL;
 691         const char *dev_str, *part_str;
 692         int ret;
 693
 694         /* Separate device and partition name specification */
 695         if (dev_part_str)
 696                 part_str = strchr(dev_part_str, '#');
 697         else
 698                 part_str = NULL;
 699
 700         if (part_str) {
 701                 dup_str = strdup(dev_part_str);
 702                 dup_str[part_str - dev_part_str] = 0;
 703                 dev_str = dup_str;
 704                 part_str++;
 705         } else {
 706                 return -EINVAL;
 707         }
 708
 709         ret = blk_get_device_by_str(dev_iface, dev_str, dev_desc);
 710         if (ret < 0)
 711                 goto cleanup;
 712
 713         ret = part_get_info_by_name(*dev_desc, part_str, part_info);
 714         if (ret < 0)
 715                 printf("Could not find \"%s\" partition\n", part_str);
 716
 717 cleanup:
 718         free(dup_str);
 719         return ret;
 720 }
 721
 722 int part_get_info_by_dev_and_name_or_num(const char *dev_iface,
 723                                          const char *dev_part_str,
 724                                          struct blk_desc **dev_desc,
 725                                          struct disk_partition *part_info,
 726                                          int allow_whole_dev)
 727 {
 728         int ret;
 729
 730         /* Split the part_name if passed as "$dev_num#part_name". */
 731         ret = part_get_info_by_dev_and_name(dev_iface, dev_part_str,
 732                                             dev_desc, part_info);
 733         if (ret >= 0)
 734                 return ret;
 735         /*
 736          * Couldn't lookup by name, try looking up the partition description
 737          * directly.
 738          */
 739         ret = blk_get_device_part_str(dev_iface, dev_part_str,
 740                                       dev_desc, part_info, allow_whole_dev);
 741         if (ret < 0)
 742                 printf("Couldn't find partition %s %s\n",
 743                        dev_iface, dev_part_str);
 744         return ret;
 745 }
 746
 747 void part_set_generic_name(const struct blk_desc *dev_desc,
 748         int part_num, char *name)
 749 {
 750         char *devtype;
 751
 752         switch (dev_desc->uclass_id) {
 753         case UCLASS_IDE:
 754         case UCLASS_AHCI:
 755                 devtype = "hd";
 756                 break;
 757         case UCLASS_SCSI:
 758                 devtype = "sd";
 759                 break;
 760         case UCLASS_USB:
 761                 devtype = "usbd";
 762                 break;
 763         case UCLASS_MMC:
 764                 devtype = "mmcsd";
 765                 break;
 766         default:
 767                 devtype = "xx";
 768                 break;
 769         }
 770
 771         sprintf(name, "%s%c%d", devtype, 'a' + dev_desc->devnum, part_num);
 772 }