disk/part.c

   1 /*
   2  * (C) Copyright 2001
   3  * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
   4  *
   5  * SPDX-License-Identifier:     GPL-2.0+
   6  */
   7
   8 #include <common.h>
   9 #include <command.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 struct block_drvr {
  24         char *name;
  25         struct blk_desc* (*get_dev)(int dev);
  26         int (*select_hwpart)(int dev_num, int hwpart);
  27 };
  28
  29 static const struct block_drvr block_drvr[] = {
  30 #if defined(CONFIG_CMD_IDE)
  31         { .name = "ide", .get_dev = ide_get_dev, },
  32 #endif
  33 #if defined(CONFIG_CMD_SATA)
  34         {.name = "sata", .get_dev = sata_get_dev, },
  35 #endif
  36 #if defined(CONFIG_CMD_SCSI)
  37         { .name = "scsi", .get_dev = scsi_get_dev, },
  38 #endif
  39 #if defined(CONFIG_CMD_USB) && defined(CONFIG_USB_STORAGE)
  40         { .name = "usb", .get_dev = usb_stor_get_dev, },
  41 #endif
  42 #if defined(CONFIG_MMC)
  43         {
  44                 .name = "mmc",
  45                 .get_dev = mmc_get_dev,
  46                 .select_hwpart = mmc_select_hwpart,
  47         },
  48 #endif
  49 #if defined(CONFIG_SYSTEMACE)
  50         { .name = "ace", .get_dev = systemace_get_dev, },
  51 #endif
  52 #if defined(CONFIG_SANDBOX)
  53         { .name = "host", .get_dev = host_get_dev, },
  54 #endif
  55         { },
  56 };
  57
  58 DECLARE_GLOBAL_DATA_PTR;
  59
  60 #ifdef HAVE_BLOCK_DEVICE
  61 static struct blk_desc *get_dev_hwpart(const char *ifname, int dev, int hwpart)
  62 {
  63         const struct block_drvr *drvr = block_drvr;
  64         struct blk_desc* (*reloc_get_dev)(int dev);
  65         int (*select_hwpart)(int dev_num, int hwpart);
  66         char *name;
  67         int ret;
  68
  69         if (!ifname)
  70                 return NULL;
  71
  72         name = drvr->name;
  73 #ifdef CONFIG_NEEDS_MANUAL_RELOC
  74         name += gd->reloc_off;
  75 #endif
  76         while (drvr->name) {
  77                 name = drvr->name;
  78                 reloc_get_dev = drvr->get_dev;
  79                 select_hwpart = drvr->select_hwpart;
  80 #ifdef CONFIG_NEEDS_MANUAL_RELOC
  81                 name += gd->reloc_off;
  82                 reloc_get_dev += gd->reloc_off;
  83                 if (select_hwpart)
  84                         select_hwpart += gd->reloc_off;
  85 #endif
  86                 if (strncmp(ifname, name, strlen(name)) == 0) {
  87                         struct blk_desc *dev_desc = reloc_get_dev(dev);
  88                         if (!dev_desc)
  89                                 return NULL;
  90                         if (hwpart == 0 && !select_hwpart)
  91                                 return dev_desc;
  92                         if (!select_hwpart)
  93                                 return NULL;
  94                         ret = select_hwpart(dev_desc->dev, hwpart);
  95                         if (ret < 0)
  96                                 return NULL;
  97                         return dev_desc;
  98                 }
  99                 drvr++;
 100         }
 101         return NULL;
 102 }
 103
 104 struct blk_desc *get_dev(const char *ifname, int dev)
 105 {
 106         return get_dev_hwpart(ifname, dev, 0);
 107 }
 108 #else
 109 struct blk_desc *get_dev_hwpart(const char *ifname, int dev, int hwpart)
 110 {
 111         return NULL;
 112 }
 113
 114 struct blk_desc *get_dev(const char *ifname, int dev)
 115 {
 116         return NULL;
 117 }
 118 #endif
 119
 120 #ifdef HAVE_BLOCK_DEVICE
 121
 122 /* ------------------------------------------------------------------------- */
 123 /*
 124  * reports device info to the user
 125  */
 126
 127 #ifdef CONFIG_LBA48
 128 typedef uint64_t lba512_t;
 129 #else
 130 typedef lbaint_t lba512_t;
 131 #endif
 132
 133 /*
 134  * Overflowless variant of (block_count * mul_by / div_by)
 135  * when div_by > mul_by
 136  */
 137 static lba512_t lba512_muldiv(lba512_t block_count, lba512_t mul_by, lba512_t div_by)
 138 {
 139         lba512_t bc_quot, bc_rem;
 140
 141         /* x * m / d == x / d * m + (x % d) * m / d */
 142         bc_quot = block_count / div_by;
 143         bc_rem  = block_count - div_by * bc_quot;
 144         return bc_quot * mul_by + (bc_rem * mul_by) / div_by;
 145 }
 146
 147 void dev_print (struct blk_desc *dev_desc)
 148 {
 149         lba512_t lba512; /* number of blocks if 512bytes block size */
 150
 151         if (dev_desc->type == DEV_TYPE_UNKNOWN) {
 152                 puts ("not available\n");
 153                 return;
 154         }
 155
 156         switch (dev_desc->if_type) {
 157         case IF_TYPE_SCSI:
 158                 printf ("(%d:%d) Vendor: %s Prod.: %s Rev: %s\n",
 159                         dev_desc->target,dev_desc->lun,
 160                         dev_desc->vendor,
 161                         dev_desc->product,
 162                         dev_desc->revision);
 163                 break;
 164         case IF_TYPE_ATAPI:
 165         case IF_TYPE_IDE:
 166         case IF_TYPE_SATA:
 167                 printf ("Model: %s Firm: %s Ser#: %s\n",
 168                         dev_desc->vendor,
 169                         dev_desc->revision,
 170                         dev_desc->product);
 171                 break;
 172         case IF_TYPE_SD:
 173         case IF_TYPE_MMC:
 174         case IF_TYPE_USB:
 175                 printf ("Vendor: %s Rev: %s Prod: %s\n",
 176                         dev_desc->vendor,
 177                         dev_desc->revision,
 178                         dev_desc->product);
 179                 break;
 180         case IF_TYPE_DOC:
 181                 puts("device type DOC\n");
 182                 return;
 183         case IF_TYPE_UNKNOWN:
 184                 puts("device type unknown\n");
 185                 return;
 186         default:
 187                 printf("Unhandled device type: %i\n", dev_desc->if_type);
 188                 return;
 189         }
 190         puts ("            Type: ");
 191         if (dev_desc->removable)
 192                 puts ("Removable ");
 193         switch (dev_desc->type & 0x1F) {
 194         case DEV_TYPE_HARDDISK:
 195                 puts ("Hard Disk");
 196                 break;
 197         case DEV_TYPE_CDROM:
 198                 puts ("CD ROM");
 199                 break;
 200         case DEV_TYPE_OPDISK:
 201                 puts ("Optical Device");
 202                 break;
 203         case DEV_TYPE_TAPE:
 204                 puts ("Tape");
 205                 break;
 206         default:
 207                 printf ("# %02X #", dev_desc->type & 0x1F);
 208                 break;
 209         }
 210         puts ("\n");
 211         if (dev_desc->lba > 0L && dev_desc->blksz > 0L) {
 212                 ulong mb, mb_quot, mb_rem, gb, gb_quot, gb_rem;
 213                 lbaint_t lba;
 214
 215                 lba = dev_desc->lba;
 216
 217                 lba512 = (lba * (dev_desc->blksz/512));
 218                 /* round to 1 digit */
 219                 /* 2048 = (1024 * 1024) / 512 MB */
 220                 mb = lba512_muldiv(lba512, 10, 2048);
 221
 222                 mb_quot = mb / 10;
 223                 mb_rem  = mb - (10 * mb_quot);
 224
 225                 gb = mb / 1024;
 226                 gb_quot = gb / 10;
 227                 gb_rem  = gb - (10 * gb_quot);
 228 #ifdef CONFIG_LBA48
 229                 if (dev_desc->lba48)
 230                         printf ("            Supports 48-bit addressing\n");
 231 #endif
 232 #if defined(CONFIG_SYS_64BIT_LBA)
 233                 printf ("            Capacity: %ld.%ld MB = %ld.%ld GB (%Ld x %ld)\n",
 234                         mb_quot, mb_rem,
 235                         gb_quot, gb_rem,
 236                         lba,
 237                         dev_desc->blksz);
 238 #else
 239                 printf ("            Capacity: %ld.%ld MB = %ld.%ld GB (%ld x %ld)\n",
 240                         mb_quot, mb_rem,
 241                         gb_quot, gb_rem,
 242                         (ulong)lba,
 243                         dev_desc->blksz);
 244 #endif
 245         } else {
 246                 puts ("            Capacity: not available\n");
 247         }
 248 }
 249 #endif
 250
 251 #ifdef HAVE_BLOCK_DEVICE
 252
 253 void init_part(struct blk_desc *dev_desc)
 254 {
 255 #ifdef CONFIG_ISO_PARTITION
 256         if (test_part_iso(dev_desc) == 0) {
 257                 dev_desc->part_type = PART_TYPE_ISO;
 258                 return;
 259         }
 260 #endif
 261
 262 #ifdef CONFIG_MAC_PARTITION
 263         if (test_part_mac(dev_desc) == 0) {
 264                 dev_desc->part_type = PART_TYPE_MAC;
 265                 return;
 266         }
 267 #endif
 268
 269 /* must be placed before DOS partition detection */
 270 #ifdef CONFIG_EFI_PARTITION
 271         if (test_part_efi(dev_desc) == 0) {
 272                 dev_desc->part_type = PART_TYPE_EFI;
 273                 return;
 274         }
 275 #endif
 276
 277 #ifdef CONFIG_DOS_PARTITION
 278         if (test_part_dos(dev_desc) == 0) {
 279                 dev_desc->part_type = PART_TYPE_DOS;
 280                 return;
 281         }
 282 #endif
 283
 284 #ifdef CONFIG_AMIGA_PARTITION
 285         if (test_part_amiga(dev_desc) == 0) {
 286             dev_desc->part_type = PART_TYPE_AMIGA;
 287             return;
 288         }
 289 #endif
 290         dev_desc->part_type = PART_TYPE_UNKNOWN;
 291 }
 292
 293
 294 #if defined(CONFIG_MAC_PARTITION) || \
 295         defined(CONFIG_DOS_PARTITION) || \
 296         defined(CONFIG_ISO_PARTITION) || \
 297         defined(CONFIG_AMIGA_PARTITION) || \
 298         defined(CONFIG_EFI_PARTITION)
 299
 300 static void print_part_header(const char *type, struct blk_desc *dev_desc)
 301 {
 302         puts ("\nPartition Map for ");
 303         switch (dev_desc->if_type) {
 304         case IF_TYPE_IDE:
 305                 puts ("IDE");
 306                 break;
 307         case IF_TYPE_SATA:
 308                 puts ("SATA");
 309                 break;
 310         case IF_TYPE_SCSI:
 311                 puts ("SCSI");
 312                 break;
 313         case IF_TYPE_ATAPI:
 314                 puts ("ATAPI");
 315                 break;
 316         case IF_TYPE_USB:
 317                 puts ("USB");
 318                 break;
 319         case IF_TYPE_DOC:
 320                 puts ("DOC");
 321                 break;
 322         case IF_TYPE_MMC:
 323                 puts ("MMC");
 324                 break;
 325         case IF_TYPE_HOST:
 326                 puts("HOST");
 327                 break;
 328         default:
 329                 puts ("UNKNOWN");
 330                 break;
 331         }
 332         printf (" device %d  --   Partition Type: %s\n\n",
 333                         dev_desc->dev, type);
 334 }
 335
 336 #endif /* any CONFIG_..._PARTITION */
 337
 338 void print_part(struct blk_desc *dev_desc)
 339 {
 340
 341                 switch (dev_desc->part_type) {
 342 #ifdef CONFIG_MAC_PARTITION
 343         case PART_TYPE_MAC:
 344                 PRINTF ("## Testing for valid MAC partition ##\n");
 345                 print_part_header ("MAC", dev_desc);
 346                 print_part_mac (dev_desc);
 347                 return;
 348 #endif
 349 #ifdef CONFIG_DOS_PARTITION
 350         case PART_TYPE_DOS:
 351                 PRINTF ("## Testing for valid DOS partition ##\n");
 352                 print_part_header ("DOS", dev_desc);
 353                 print_part_dos (dev_desc);
 354                 return;
 355 #endif
 356
 357 #ifdef CONFIG_ISO_PARTITION
 358         case PART_TYPE_ISO:
 359                 PRINTF ("## Testing for valid ISO Boot partition ##\n");
 360                 print_part_header ("ISO", dev_desc);
 361                 print_part_iso (dev_desc);
 362                 return;
 363 #endif
 364
 365 #ifdef CONFIG_AMIGA_PARTITION
 366         case PART_TYPE_AMIGA:
 367             PRINTF ("## Testing for a valid Amiga partition ##\n");
 368             print_part_header ("AMIGA", dev_desc);
 369             print_part_amiga (dev_desc);
 370             return;
 371 #endif
 372
 373 #ifdef CONFIG_EFI_PARTITION
 374         case PART_TYPE_EFI:
 375                 PRINTF ("## Testing for valid EFI partition ##\n");
 376                 print_part_header ("EFI", dev_desc);
 377                 print_part_efi (dev_desc);
 378                 return;
 379 #endif
 380         }
 381         puts ("## Unknown partition table\n");
 382 }
 383
 384 #endif /* HAVE_BLOCK_DEVICE */
 385
 386 int get_partition_info(struct blk_desc *dev_desc, int part,
 387                        disk_partition_t *info)
 388 {
 389 #ifdef HAVE_BLOCK_DEVICE
 390
 391 #ifdef CONFIG_PARTITION_UUIDS
 392         /* The common case is no UUID support */
 393         info->uuid[0] = 0;
 394 #endif
 395 #ifdef CONFIG_PARTITION_TYPE_GUID
 396         info->type_guid[0] = 0;
 397 #endif
 398
 399         switch (dev_desc->part_type) {
 400 #ifdef CONFIG_MAC_PARTITION
 401         case PART_TYPE_MAC:
 402                 if (get_partition_info_mac(dev_desc, part, info) == 0) {
 403                         PRINTF("## Valid MAC partition found ##\n");
 404                         return 0;
 405                 }
 406                 break;
 407 #endif
 408
 409 #ifdef CONFIG_DOS_PARTITION
 410         case PART_TYPE_DOS:
 411                 if (get_partition_info_dos(dev_desc, part, info) == 0) {
 412                         PRINTF("## Valid DOS partition found ##\n");
 413                         return 0;
 414                 }
 415                 break;
 416 #endif
 417
 418 #ifdef CONFIG_ISO_PARTITION
 419         case PART_TYPE_ISO:
 420                 if (get_partition_info_iso(dev_desc, part, info) == 0) {
 421                         PRINTF("## Valid ISO boot partition found ##\n");
 422                         return 0;
 423                 }
 424                 break;
 425 #endif
 426
 427 #ifdef CONFIG_AMIGA_PARTITION
 428         case PART_TYPE_AMIGA:
 429                 if (get_partition_info_amiga(dev_desc, part, info) == 0) {
 430                         PRINTF("## Valid Amiga partition found ##\n");
 431                         return 0;
 432                 }
 433                 break;
 434 #endif
 435
 436 #ifdef CONFIG_EFI_PARTITION
 437         case PART_TYPE_EFI:
 438                 if (get_partition_info_efi(dev_desc, part, info) == 0) {
 439                         PRINTF("## Valid EFI partition found ##\n");
 440                         return 0;
 441                 }
 442                 break;
 443 #endif
 444         default:
 445                 break;
 446         }
 447 #endif /* HAVE_BLOCK_DEVICE */
 448
 449         return -1;
 450 }
 451
 452 int get_device(const char *ifname, const char *dev_hwpart_str,
 453                struct blk_desc **dev_desc)
 454 {
 455         char *ep;
 456         char *dup_str = NULL;
 457         const char *dev_str, *hwpart_str;
 458         int dev, hwpart;
 459
 460         hwpart_str = strchr(dev_hwpart_str, '.');
 461         if (hwpart_str) {
 462                 dup_str = strdup(dev_hwpart_str);
 463                 dup_str[hwpart_str - dev_hwpart_str] = 0;
 464                 dev_str = dup_str;
 465                 hwpart_str++;
 466         } else {
 467                 dev_str = dev_hwpart_str;
 468                 hwpart = 0;
 469         }
 470
 471         dev = simple_strtoul(dev_str, &ep, 16);
 472         if (*ep) {
 473                 printf("** Bad device specification %s %s **\n",
 474                        ifname, dev_str);
 475                 dev = -1;
 476                 goto cleanup;
 477         }
 478
 479         if (hwpart_str) {
 480                 hwpart = simple_strtoul(hwpart_str, &ep, 16);
 481                 if (*ep) {
 482                         printf("** Bad HW partition specification %s %s **\n",
 483                             ifname, hwpart_str);
 484                         dev = -1;
 485                         goto cleanup;
 486                 }
 487         }
 488
 489         *dev_desc = get_dev_hwpart(ifname, dev, hwpart);
 490         if (!(*dev_desc) || ((*dev_desc)->type == DEV_TYPE_UNKNOWN)) {
 491                 printf("** Bad device %s %s **\n", ifname, dev_hwpart_str);
 492                 dev = -1;
 493                 goto cleanup;
 494         }
 495
 496 #ifdef HAVE_BLOCK_DEVICE
 497         /*
 498          * Updates the partition table for the specified hw partition.
 499          * Does not need to be done for hwpart 0 since it is default and
 500          * already loaded.
 501          */
 502         if(hwpart != 0)
 503                 init_part(*dev_desc);
 504 #endif
 505
 506 cleanup:
 507         free(dup_str);
 508         return dev;
 509 }
 510
 511 #define PART_UNSPECIFIED -2
 512 #define PART_AUTO -1
 513 #define MAX_SEARCH_PARTITIONS 16
 514 int get_device_and_partition(const char *ifname, const char *dev_part_str,
 515                              struct blk_desc **dev_desc,
 516                              disk_partition_t *info, int allow_whole_dev)
 517 {
 518         int ret = -1;
 519         const char *part_str;
 520         char *dup_str = NULL;
 521         const char *dev_str;
 522         int dev;
 523         char *ep;
 524         int p;
 525         int part;
 526         disk_partition_t tmpinfo;
 527
 528 #if defined CONFIG_SANDBOX && defined CONFIG_CMD_UBIFS
 529 #error Only one of CONFIG_SANDBOX and CONFIG_CMD_UBIFS may be selected
 530 #endif
 531
 532 #ifdef CONFIG_SANDBOX
 533         /*
 534          * Special-case a pseudo block device "hostfs", to allow access to the
 535          * host's own filesystem.
 536          */
 537         if (0 == strcmp(ifname, "hostfs")) {
 538                 *dev_desc = NULL;
 539                 info->start = 0;
 540                 info->size = 0;
 541                 info->blksz = 0;
 542                 info->bootable = 0;
 543                 strcpy((char *)info->type, BOOT_PART_TYPE);
 544                 strcpy((char *)info->name, "Sandbox host");
 545 #ifdef CONFIG_PARTITION_UUIDS
 546                 info->uuid[0] = 0;
 547 #endif
 548 #ifdef CONFIG_PARTITION_TYPE_GUID
 549                 info->type_guid[0] = 0;
 550 #endif
 551
 552                 return 0;
 553         }
 554 #endif
 555
 556 #ifdef CONFIG_CMD_UBIFS
 557         /*
 558          * Special-case ubi, ubi goes through a mtd, rathen then through
 559          * a regular block device.
 560          */
 561         if (0 == strcmp(ifname, "ubi")) {
 562                 if (!ubifs_is_mounted()) {
 563                         printf("UBIFS not mounted, use ubifsmount to mount volume first!\n");
 564                         return -1;
 565                 }
 566
 567                 *dev_desc = NULL;
 568                 memset(info, 0, sizeof(*info));
 569                 strcpy((char *)info->type, BOOT_PART_TYPE);
 570                 strcpy((char *)info->name, "UBI");
 571 #ifdef CONFIG_PARTITION_UUIDS
 572                 info->uuid[0] = 0;
 573 #endif
 574                 return 0;
 575         }
 576 #endif
 577
 578         /* If no dev_part_str, use bootdevice environment variable */
 579         if (!dev_part_str || !strlen(dev_part_str) ||
 580             !strcmp(dev_part_str, "-"))
 581                 dev_part_str = getenv("bootdevice");
 582
 583         /* If still no dev_part_str, it's an error */
 584         if (!dev_part_str) {
 585                 printf("** No device specified **\n");
 586                 goto cleanup;
 587         }
 588
 589         /* Separate device and partition ID specification */
 590         part_str = strchr(dev_part_str, ':');
 591         if (part_str) {
 592                 dup_str = strdup(dev_part_str);
 593                 dup_str[part_str - dev_part_str] = 0;
 594                 dev_str = dup_str;
 595                 part_str++;
 596         } else {
 597                 dev_str = dev_part_str;
 598         }
 599
 600         /* Look up the device */
 601         dev = get_device(ifname, dev_str, dev_desc);
 602         if (dev < 0)
 603                 goto cleanup;
 604
 605         /* Convert partition ID string to number */
 606         if (!part_str || !*part_str) {
 607                 part = PART_UNSPECIFIED;
 608         } else if (!strcmp(part_str, "auto")) {
 609                 part = PART_AUTO;
 610         } else {
 611                 /* Something specified -> use exactly that */
 612                 part = (int)simple_strtoul(part_str, &ep, 16);
 613                 /*
 614                  * Less than whole string converted,
 615                  * or request for whole device, but caller requires partition.
 616                  */
 617                 if (*ep || (part == 0 && !allow_whole_dev)) {
 618                         printf("** Bad partition specification %s %s **\n",
 619                             ifname, dev_part_str);
 620                         goto cleanup;
 621                 }
 622         }
 623
 624         /*
 625          * No partition table on device,
 626          * or user requested partition 0 (entire device).
 627          */
 628         if (((*dev_desc)->part_type == PART_TYPE_UNKNOWN) ||
 629             (part == 0)) {
 630                 if (!(*dev_desc)->lba) {
 631                         printf("** Bad device size - %s %s **\n", ifname,
 632                                dev_str);
 633                         goto cleanup;
 634                 }
 635
 636                 /*
 637                  * If user specified a partition ID other than 0,
 638                  * or the calling command only accepts partitions,
 639                  * it's an error.
 640                  */
 641                 if ((part > 0) || (!allow_whole_dev)) {
 642                         printf("** No partition table - %s %s **\n", ifname,
 643                                dev_str);
 644                         goto cleanup;
 645                 }
 646
 647                 (*dev_desc)->log2blksz = LOG2((*dev_desc)->blksz);
 648
 649                 info->start = 0;
 650                 info->size = (*dev_desc)->lba;
 651                 info->blksz = (*dev_desc)->blksz;
 652                 info->bootable = 0;
 653                 strcpy((char *)info->type, BOOT_PART_TYPE);
 654                 strcpy((char *)info->name, "Whole Disk");
 655 #ifdef CONFIG_PARTITION_UUIDS
 656                 info->uuid[0] = 0;
 657 #endif
 658 #ifdef CONFIG_PARTITION_TYPE_GUID
 659                 info->type_guid[0] = 0;
 660 #endif
 661
 662                 ret = 0;
 663                 goto cleanup;
 664         }
 665
 666         /*
 667          * Now there's known to be a partition table,
 668          * not specifying a partition means to pick partition 1.
 669          */
 670         if (part == PART_UNSPECIFIED)
 671                 part = 1;
 672
 673         /*
 674          * If user didn't specify a partition number, or did specify something
 675          * other than "auto", use that partition number directly.
 676          */
 677         if (part != PART_AUTO) {
 678                 ret = get_partition_info(*dev_desc, part, info);
 679                 if (ret) {
 680                         printf("** Invalid partition %d **\n", part);
 681                         goto cleanup;
 682                 }
 683         } else {
 684                 /*
 685                  * Find the first bootable partition.
 686                  * If none are bootable, fall back to the first valid partition.
 687                  */
 688                 part = 0;
 689                 for (p = 1; p <= MAX_SEARCH_PARTITIONS; p++) {
 690                         ret = get_partition_info(*dev_desc, p, info);
 691                         if (ret)
 692                                 continue;
 693
 694                         /*
 695                          * First valid partition, or new better partition?
 696                          * If so, save partition ID.
 697                          */
 698                         if (!part || info->bootable)
 699                                 part = p;
 700
 701                         /* Best possible partition? Stop searching. */
 702                         if (info->bootable)
 703                                 break;
 704
 705                         /*
 706                          * We now need to search further for best possible.
 707                          * If we what we just queried was the best so far,
 708                          * save the info since we over-write it next loop.
 709                          */
 710                         if (part == p)
 711                                 tmpinfo = *info;
 712                 }
 713                 /* If we found any acceptable partition */
 714                 if (part) {
 715                         /*
 716                          * If we searched all possible partition IDs,
 717                          * return the first valid partition we found.
 718                          */
 719                         if (p == MAX_SEARCH_PARTITIONS + 1)
 720                                 *info = tmpinfo;
 721                 } else {
 722                         printf("** No valid partitions found **\n");
 723                         ret = -1;
 724                         goto cleanup;
 725                 }
 726         }
 727         if (strncmp((char *)info->type, BOOT_PART_TYPE, sizeof(info->type)) != 0) {
 728                 printf("** Invalid partition type \"%.32s\""
 729                         " (expect \"" BOOT_PART_TYPE "\")\n",
 730                         info->type);
 731                 ret  = -1;
 732                 goto cleanup;
 733         }
 734
 735         (*dev_desc)->log2blksz = LOG2((*dev_desc)->blksz);
 736
 737         ret = part;
 738         goto cleanup;
 739
 740 cleanup:
 741         free(dup_str);
 742         return ret;
 743 }