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 /**
  30  * part_driver_get_type() - Get a driver given its type
  31  *
  32  * @part_type: Partition type to find the driver for
  33  * Return: Driver for that type, or NULL if none
  34  */
  35 static struct part_driver *part_driver_get_type(int part_type)
  36 {
  37         struct part_driver *drv =
  38                 ll_entry_start(struct part_driver, part_driver);
  39         const int n_ents = ll_entry_count(struct part_driver, part_driver);
  40         struct part_driver *entry;
  41
  42         for (entry = drv; entry != drv + n_ents; entry++) {
  43                 if (part_type == entry->part_type)
  44                         return entry;
  45         }
  46
  47         /* Not found */
  48         return NULL;
  49 }
  50
  51 /**
  52  * part_driver_lookup_type() - Look up the partition driver for a blk device
  53  *
  54  * If @desc->part_type is PART_TYPE_UNKNOWN, this checks each parition driver
  55  * against the blk device to see if there is a valid partition table acceptable
  56  * to that driver.
  57  *
  58  * If @desc->part_type is already set, it just returns the driver for that
  59  * type, without testing if the driver can find a valid partition on the
  60  * descriptor.
  61  *
  62  * On success it updates @desc->part_type if set to PART_TYPE_UNKNOWN on entry
  63  *
  64  * @dev_desc: Device descriptor
  65  * Return: Driver found, or NULL if none
  66  */
  67 static struct part_driver *part_driver_lookup_type(struct blk_desc *desc)
  68 {
  69         struct part_driver *drv =
  70                 ll_entry_start(struct part_driver, part_driver);
  71         const int n_ents = ll_entry_count(struct part_driver, part_driver);
  72         struct part_driver *entry;
  73
  74         if (desc->part_type == PART_TYPE_UNKNOWN) {
  75                 for (entry = drv; entry != drv + n_ents; entry++) {
  76                         int ret;
  77
  78                         ret = entry->test(desc);
  79                         if (!ret) {
  80                                 desc->part_type = entry->part_type;
  81                                 return entry;
  82                         }
  83                 }
  84         } else {
  85                 return part_driver_get_type(desc->part_type);
  86         }
  87
  88         /* Not found */
  89         return NULL;
  90 }
  91
  92 int part_get_type_by_name(const char *name)
  93 {
  94         struct part_driver *drv =
  95                 ll_entry_start(struct part_driver, part_driver);
  96         const int n_ents = ll_entry_count(struct part_driver, part_driver);
  97         struct part_driver *entry;
  98
  99         for (entry = drv; entry != drv + n_ents; entry++) {
 100                 if (!strcasecmp(name, entry->name))
 101                         return entry->part_type;
 102         }
 103
 104         /* Not found */
 105         return PART_TYPE_UNKNOWN;
 106 }
 107
 108 /**
 109  * get_dev_hwpart() - Get the descriptor for a device with hardware partitions
 110  *
 111  * @ifname:     Interface name (e.g. "ide", "scsi")
 112  * @dev:        Device number (0 for first device on that interface, 1 for
 113  *              second, etc.
 114  * @hwpart: Hardware partition, or 0 if none (used for MMC)
 115  * Return: pointer to the block device, or NULL if not available, or an
 116  *         error occurred.
 117  */
 118 static struct blk_desc *get_dev_hwpart(const char *ifname, int dev, int hwpart)
 119 {
 120         struct blk_desc *desc;
 121         int ret;
 122
 123         if (!blk_enabled())
 124                 return NULL;
 125         desc = blk_get_devnum_by_uclass_idname(ifname, dev);
 126         if (!desc) {
 127                 debug("%s: No device for iface '%s', dev %d\n", __func__,
 128                       ifname, dev);
 129                 return NULL;
 130         }
 131         ret = blk_dselect_hwpart(desc, hwpart);
 132         if (ret) {
 133                 debug("%s: Failed to select h/w partition: err-%d\n", __func__,
 134                       ret);
 135                 return NULL;
 136         }
 137
 138         return desc;
 139 }
 140
 141 struct blk_desc *blk_get_dev(const char *ifname, int dev)
 142 {
 143         if (!blk_enabled())
 144                 return NULL;
 145
 146         return get_dev_hwpart(ifname, dev, 0);
 147 }
 148
 149 /* ------------------------------------------------------------------------- */
 150 /*
 151  * reports device info to the user
 152  */
 153
 154 #ifdef CONFIG_LBA48
 155 typedef uint64_t lba512_t;
 156 #else
 157 typedef lbaint_t lba512_t;
 158 #endif
 159
 160 /*
 161  * Overflowless variant of (block_count * mul_by / 2**right_shift)
 162  * when 2**right_shift > mul_by
 163  */
 164 static lba512_t lba512_muldiv(lba512_t block_count, lba512_t mul_by,
 165                               int right_shift)
 166 {
 167         lba512_t bc_quot, bc_rem;
 168
 169         /* x * m / d == x / d * m + (x % d) * m / d */
 170         bc_quot = block_count >> right_shift;
 171         bc_rem  = block_count - (bc_quot << right_shift);
 172         return bc_quot * mul_by + ((bc_rem * mul_by) >> right_shift);
 173 }
 174
 175 void dev_print(struct blk_desc *desc)
 176 {
 177         lba512_t lba512; /* number of blocks if 512bytes block size */
 178
 179         if (desc->type == DEV_TYPE_UNKNOWN) {
 180                 puts ("not available\n");
 181                 return;
 182         }
 183
 184         switch (desc->uclass_id) {
 185         case UCLASS_SCSI:
 186                 printf("(%d:%d) Vendor: %s Prod.: %s Rev: %s\n", desc->target,
 187                        desc->lun, desc->vendor, desc->product, desc->revision);
 188                 break;
 189         case UCLASS_IDE:
 190         case UCLASS_AHCI:
 191                 printf("Model: %s Firm: %s Ser#: %s\n", desc->vendor,
 192                        desc->revision, desc->product);
 193                 break;
 194         case UCLASS_MMC:
 195         case UCLASS_USB:
 196         case UCLASS_NVME:
 197         case UCLASS_PVBLOCK:
 198         case UCLASS_HOST:
 199         case UCLASS_BLKMAP:
 200                 printf ("Vendor: %s Rev: %s Prod: %s\n",
 201                         desc->vendor,
 202                         desc->revision,
 203                         desc->product);
 204                 break;
 205         case UCLASS_VIRTIO:
 206                 printf("%s VirtIO Block Device\n", desc->vendor);
 207                 break;
 208         case UCLASS_EFI_MEDIA:
 209                 printf("EFI media Block Device %d\n", desc->devnum);
 210                 break;
 211         case UCLASS_INVALID:
 212                 puts("device type unknown\n");
 213                 return;
 214         default:
 215                 printf("Unhandled device type: %i\n", desc->uclass_id);
 216                 return;
 217         }
 218         puts ("            Type: ");
 219         if (desc->removable)
 220                 puts ("Removable ");
 221         switch (desc->type & 0x1F) {
 222         case DEV_TYPE_HARDDISK:
 223                 puts ("Hard Disk");
 224                 break;
 225         case DEV_TYPE_CDROM:
 226                 puts ("CD ROM");
 227                 break;
 228         case DEV_TYPE_OPDISK:
 229                 puts ("Optical Device");
 230                 break;
 231         case DEV_TYPE_TAPE:
 232                 puts ("Tape");
 233                 break;
 234         default:
 235                 printf("# %02X #", desc->type & 0x1F);
 236                 break;
 237         }
 238         puts ("\n");
 239         if (desc->lba > 0L && desc->blksz > 0L) {
 240                 ulong mb, mb_quot, mb_rem, gb, gb_quot, gb_rem;
 241                 lbaint_t lba;
 242
 243                 lba = desc->lba;
 244
 245                 lba512 = lba * (desc->blksz / 512);
 246                 /* round to 1 digit */
 247                 /* 2048 = (1024 * 1024) / 512 MB */
 248                 mb = lba512_muldiv(lba512, 10, 11);
 249
 250                 mb_quot = mb / 10;
 251                 mb_rem  = mb - (10 * mb_quot);
 252
 253                 gb = mb / 1024;
 254                 gb_quot = gb / 10;
 255                 gb_rem  = gb - (10 * gb_quot);
 256 #ifdef CONFIG_LBA48
 257                 if (desc->lba48)
 258                         printf ("            Supports 48-bit addressing\n");
 259 #endif
 260 #if defined(CONFIG_SYS_64BIT_LBA)
 261                 printf ("            Capacity: %lu.%lu MB = %lu.%lu GB (%llu x %lu)\n",
 262                         mb_quot, mb_rem,
 263                         gb_quot, gb_rem,
 264                         lba,
 265                         desc->blksz);
 266 #else
 267                 printf ("            Capacity: %lu.%lu MB = %lu.%lu GB (%lu x %lu)\n",
 268                         mb_quot, mb_rem,
 269                         gb_quot, gb_rem,
 270                         (ulong)lba,
 271                         desc->blksz);
 272 #endif
 273         } else {
 274                 puts ("            Capacity: not available\n");
 275         }
 276 }
 277
 278 void part_init(struct blk_desc *desc)
 279 {
 280         struct part_driver *drv =
 281                 ll_entry_start(struct part_driver, part_driver);
 282         const int n_ents = ll_entry_count(struct part_driver, part_driver);
 283         struct part_driver *entry;
 284
 285         blkcache_invalidate(desc->uclass_id, desc->devnum);
 286
 287         desc->part_type = PART_TYPE_UNKNOWN;
 288         for (entry = drv; entry != drv + n_ents; entry++) {
 289                 int ret;
 290
 291                 ret = entry->test(desc);
 292                 debug("%s: try '%s': ret=%d\n", __func__, entry->name, ret);
 293                 if (!ret) {
 294                         desc->part_type = entry->part_type;
 295                         break;
 296                 }
 297         }
 298 }
 299
 300 static void print_part_header(const char *type, struct blk_desc *desc)
 301 {
 302 #if CONFIG_IS_ENABLED(MAC_PARTITION) || \
 303         CONFIG_IS_ENABLED(DOS_PARTITION) || \
 304         CONFIG_IS_ENABLED(ISO_PARTITION) || \
 305         CONFIG_IS_ENABLED(AMIGA_PARTITION) || \
 306         CONFIG_IS_ENABLED(EFI_PARTITION)
 307         puts ("\nPartition Map for ");
 308         switch (desc->uclass_id) {
 309         case UCLASS_IDE:
 310                 puts ("IDE");
 311                 break;
 312         case UCLASS_AHCI:
 313                 puts ("SATA");
 314                 break;
 315         case UCLASS_SCSI:
 316                 puts ("SCSI");
 317                 break;
 318         case UCLASS_USB:
 319                 puts ("USB");
 320                 break;
 321         case UCLASS_MMC:
 322                 puts ("MMC");
 323                 break;
 324         case UCLASS_HOST:
 325                 puts ("HOST");
 326                 break;
 327         case UCLASS_NVME:
 328                 puts ("NVMe");
 329                 break;
 330         case UCLASS_PVBLOCK:
 331                 puts("PV BLOCK");
 332                 break;
 333         case UCLASS_VIRTIO:
 334                 puts("VirtIO");
 335                 break;
 336         case UCLASS_EFI_MEDIA:
 337                 puts("EFI");
 338                 break;
 339         default:
 340                 printf("UNKNOWN(%d)", desc->uclass_id);
 341                 break;
 342         }
 343         printf (" device %d  --   Partition Type: %s\n\n",
 344                         desc->devnum, type);
 345 #endif /* any CONFIG_..._PARTITION */
 346 }
 347
 348 void part_print(struct blk_desc *desc)
 349 {
 350         struct part_driver *drv;
 351
 352         drv = part_driver_lookup_type(desc);
 353         if (!drv) {
 354                 printf("## Unknown partition table type %x\n",
 355                        desc->part_type);
 356                 return;
 357         }
 358
 359         PRINTF("## Testing for valid %s partition ##\n", drv->name);
 360         print_part_header(drv->name, desc);
 361         if (drv->print)
 362                 drv->print(desc);
 363 }
 364
 365 int part_get_info_by_type(struct blk_desc *desc, int part, int part_type,
 366                           struct disk_partition *info)
 367 {
 368         struct part_driver *drv;
 369
 370         if (blk_enabled()) {
 371                 /* The common case is no UUID support */
 372                 disk_partition_clr_uuid(info);
 373                 disk_partition_clr_type_guid(info);
 374
 375                 if (part_type == PART_TYPE_UNKNOWN) {
 376                         drv = part_driver_lookup_type(desc);
 377                 } else {
 378                         drv = part_driver_get_type(part_type);
 379                 }
 380
 381                 if (!drv) {
 382                         debug("## Unknown partition table type %x\n",
 383                               desc->part_type);
 384                         return -EPROTONOSUPPORT;
 385                 }
 386                 if (!drv->get_info) {
 387                         PRINTF("## Driver %s does not have the get_info() method\n",
 388                                drv->name);
 389                         return -ENOSYS;
 390                 }
 391                 if (drv->get_info(desc, part, info) == 0) {
 392                         PRINTF("## Valid %s partition found ##\n", drv->name);
 393                         return 0;
 394                 }
 395         }
 396
 397         return -ENOENT;
 398 }
 399
 400 int part_get_info(struct blk_desc *desc, int part,
 401                   struct disk_partition *info)
 402 {
 403         return part_get_info_by_type(desc, part, PART_TYPE_UNKNOWN, info);
 404 }
 405
 406 int part_get_info_whole_disk(struct blk_desc *desc,
 407                              struct disk_partition *info)
 408 {
 409         info->start = 0;
 410         info->size = desc->lba;
 411         info->blksz = desc->blksz;
 412         info->bootable = 0;
 413         strcpy((char *)info->type, BOOT_PART_TYPE);
 414         strcpy((char *)info->name, "Whole Disk");
 415         disk_partition_clr_uuid(info);
 416         disk_partition_clr_type_guid(info);
 417
 418         return 0;
 419 }
 420
 421 int blk_get_device_by_str(const char *ifname, const char *dev_hwpart_str,
 422                           struct blk_desc **desc)
 423 {
 424         char *ep;
 425         char *dup_str = NULL;
 426         const char *dev_str, *hwpart_str;
 427         int dev, hwpart;
 428
 429         hwpart_str = strchr(dev_hwpart_str, '.');
 430         if (hwpart_str) {
 431                 dup_str = strdup(dev_hwpart_str);
 432                 dup_str[hwpart_str - dev_hwpart_str] = 0;
 433                 dev_str = dup_str;
 434                 hwpart_str++;
 435         } else {
 436                 dev_str = dev_hwpart_str;
 437                 hwpart = 0;
 438         }
 439
 440         dev = hextoul(dev_str, &ep);
 441         if (*ep) {
 442                 printf("** Bad device specification %s %s **\n",
 443                        ifname, dev_str);
 444                 dev = -EINVAL;
 445                 goto cleanup;
 446         }
 447
 448         if (hwpart_str) {
 449                 hwpart = hextoul(hwpart_str, &ep);
 450                 if (*ep) {
 451                         printf("** Bad HW partition specification %s %s **\n",
 452                             ifname, hwpart_str);
 453                         dev = -EINVAL;
 454                         goto cleanup;
 455                 }
 456         }
 457
 458         *desc = get_dev_hwpart(ifname, dev, hwpart);
 459         if (!(*desc) || ((*desc)->type == DEV_TYPE_UNKNOWN)) {
 460                 debug("** Bad device %s %s **\n", ifname, dev_hwpart_str);
 461                 dev = -ENODEV;
 462                 goto cleanup;
 463         }
 464
 465         if (blk_enabled()) {
 466                 /*
 467                  * Updates the partition table for the specified hw partition.
 468                  * Always should be done, otherwise hw partition 0 will return
 469                  * stale data after displaying a non-zero hw partition.
 470                  */
 471                 if ((*desc)->uclass_id == UCLASS_MMC)
 472                         part_init(*desc);
 473         }
 474
 475 cleanup:
 476         free(dup_str);
 477         return dev;
 478 }
 479
 480 #define PART_UNSPECIFIED -2
 481 #define PART_AUTO -1
 482 int blk_get_device_part_str(const char *ifname, const char *dev_part_str,
 483                              struct blk_desc **desc,
 484                              struct disk_partition *info, int allow_whole_dev)
 485 {
 486         int ret;
 487         const char *part_str;
 488         char *dup_str = NULL;
 489         const char *dev_str;
 490         int dev;
 491         char *ep;
 492         int p;
 493         int part;
 494         struct disk_partition tmpinfo;
 495
 496         *desc = NULL;
 497         memset(info, 0, sizeof(*info));
 498
 499 #if IS_ENABLED(CONFIG_SANDBOX) || IS_ENABLED(CONFIG_SEMIHOSTING)
 500         /*
 501          * Special-case a pseudo block device "hostfs", to allow access to the
 502          * host's own filesystem.
 503          */
 504         if (!strcmp(ifname, "hostfs")) {
 505                 strcpy((char *)info->type, BOOT_PART_TYPE);
 506                 strcpy((char *)info->name, "Host filesystem");
 507
 508                 return 0;
 509         }
 510 #endif
 511
 512 #if IS_ENABLED(CONFIG_CMD_UBIFS) && !IS_ENABLED(CONFIG_SPL_BUILD)
 513         /*
 514          * Special-case ubi, ubi goes through a mtd, rather than through
 515          * a regular block device.
 516          */
 517         if (!strcmp(ifname, "ubi")) {
 518                 if (!ubifs_is_mounted()) {
 519                         printf("UBIFS not mounted, use ubifsmount to mount volume first!\n");
 520                         return -EINVAL;
 521                 }
 522
 523                 strcpy((char *)info->type, BOOT_PART_TYPE);
 524                 strcpy((char *)info->name, "UBI");
 525                 return 0;
 526         }
 527 #endif
 528
 529         /* If no dev_part_str, use bootdevice environment variable */
 530         if (CONFIG_IS_ENABLED(ENV_SUPPORT)) {
 531                 if (!dev_part_str || !strlen(dev_part_str) ||
 532                     !strcmp(dev_part_str, "-"))
 533                         dev_part_str = env_get("bootdevice");
 534         }
 535
 536         /* If still no dev_part_str, it's an error */
 537         if (!dev_part_str) {
 538                 printf("** No device specified **\n");
 539                 ret = -ENODEV;
 540                 goto cleanup;
 541         }
 542
 543         /* Separate device and partition ID specification */
 544         part_str = strchr(dev_part_str, ':');
 545         if (part_str) {
 546                 dup_str = strdup(dev_part_str);
 547                 dup_str[part_str - dev_part_str] = 0;
 548                 dev_str = dup_str;
 549                 part_str++;
 550         } else {
 551                 dev_str = dev_part_str;
 552         }
 553
 554         /* Look up the device */
 555         dev = blk_get_device_by_str(ifname, dev_str, desc);
 556         if (dev < 0) {
 557                 printf("** Bad device specification %s %s **\n",
 558                        ifname, dev_str);
 559                 ret = dev;
 560                 goto cleanup;
 561         }
 562
 563         /* Convert partition ID string to number */
 564         if (!part_str || !*part_str) {
 565                 part = PART_UNSPECIFIED;
 566         } else if (!strcmp(part_str, "auto")) {
 567                 part = PART_AUTO;
 568         } else {
 569                 /* Something specified -> use exactly that */
 570                 part = (int)hextoul(part_str, &ep);
 571                 /*
 572                  * Less than whole string converted,
 573                  * or request for whole device, but caller requires partition.
 574                  */
 575                 if (*ep || (part == 0 && !allow_whole_dev)) {
 576                         printf("** Bad partition specification %s %s **\n",
 577                             ifname, dev_part_str);
 578                         ret = -ENOENT;
 579                         goto cleanup;
 580                 }
 581         }
 582
 583         /*
 584          * No partition table on device,
 585          * or user requested partition 0 (entire device).
 586          */
 587         if (((*desc)->part_type == PART_TYPE_UNKNOWN) || !part) {
 588                 if (!(*desc)->lba) {
 589                         printf("** Bad device size - %s %s **\n", ifname,
 590                                dev_str);
 591                         ret = -EINVAL;
 592                         goto cleanup;
 593                 }
 594
 595                 /*
 596                  * If user specified a partition ID other than 0,
 597                  * or the calling command only accepts partitions,
 598                  * it's an error.
 599                  */
 600                 if ((part > 0) || (!allow_whole_dev)) {
 601                         printf("** No partition table - %s %s **\n", ifname,
 602                                dev_str);
 603                         ret = -EPROTONOSUPPORT;
 604                         goto cleanup;
 605                 }
 606
 607                 (*desc)->log2blksz = LOG2((*desc)->blksz);
 608
 609                 part_get_info_whole_disk(*desc, info);
 610
 611                 ret = 0;
 612                 goto cleanup;
 613         }
 614
 615         /*
 616          * Now there's known to be a partition table,
 617          * not specifying a partition means to pick partition 1.
 618          */
 619         if (part == PART_UNSPECIFIED)
 620                 part = 1;
 621
 622         /*
 623          * If user didn't specify a partition number, or did specify something
 624          * other than "auto", use that partition number directly.
 625          */
 626         if (part != PART_AUTO) {
 627                 ret = part_get_info(*desc, part, info);
 628                 if (ret) {
 629                         printf("** Invalid partition %d **\n", part);
 630                         goto cleanup;
 631                 }
 632         } else {
 633                 /*
 634                  * Find the first bootable partition.
 635                  * If none are bootable, fall back to the first valid partition.
 636                  */
 637                 part = 0;
 638                 for (p = 1; p <= MAX_SEARCH_PARTITIONS; p++) {
 639                         ret = part_get_info(*desc, p, info);
 640                         if (ret)
 641                                 continue;
 642
 643                         /*
 644                          * First valid partition, or new better partition?
 645                          * If so, save partition ID.
 646                          */
 647                         if (!part || info->bootable)
 648                                 part = p;
 649
 650                         /* Best possible partition? Stop searching. */
 651                         if (info->bootable)
 652                                 break;
 653
 654                         /*
 655                          * We now need to search further for best possible.
 656                          * If we what we just queried was the best so far,
 657                          * save the info since we over-write it next loop.
 658                          */
 659                         if (part == p)
 660                                 tmpinfo = *info;
 661                 }
 662                 /* If we found any acceptable partition */
 663                 if (part) {
 664                         /*
 665                          * If we searched all possible partition IDs,
 666                          * return the first valid partition we found.
 667                          */
 668                         if (p == MAX_SEARCH_PARTITIONS + 1)
 669                                 *info = tmpinfo;
 670                 } else {
 671                         printf("** No valid partitions found **\n");
 672                         goto cleanup;
 673                 }
 674         }
 675         if (strncmp((char *)info->type, BOOT_PART_TYPE, sizeof(info->type)) != 0) {
 676                 printf("** Invalid partition type \"%.32s\""
 677                         " (expect \"" BOOT_PART_TYPE "\")\n",
 678                         info->type);
 679                 ret  = -EINVAL;
 680                 goto cleanup;
 681         }
 682
 683         (*desc)->log2blksz = LOG2((*desc)->blksz);
 684
 685         ret = part;
 686         goto cleanup;
 687
 688 cleanup:
 689         free(dup_str);
 690         return ret;
 691 }
 692
 693 int part_get_info_by_name(struct blk_desc *desc, const char *name,
 694                           struct disk_partition *info)
 695 {
 696         struct part_driver *part_drv;
 697         int ret;
 698         int i;
 699
 700         part_drv = part_driver_lookup_type(desc);
 701         if (!part_drv)
 702                 return -1;
 703
 704         if (!part_drv->get_info) {
 705                 log_debug("## Driver %s does not have the get_info() method\n",
 706                           part_drv->name);
 707                 return -ENOSYS;
 708         }
 709
 710         for (i = 1; i < part_drv->max_entries; i++) {
 711                 ret = part_drv->get_info(desc, i, info);
 712                 if (ret != 0) {
 713                         /* no more entries in table */
 714                         break;
 715                 }
 716                 if (strcmp(name, (const char *)info->name) == 0) {
 717                         /* matched */
 718                         return i;
 719                 }
 720         }
 721
 722         return -ENOENT;
 723 }
 724
 725 /**
 726  * Get partition info from device number and partition name.
 727  *
 728  * Parse a device number and partition name string in the form of
 729  * "devicenum.hwpartnum#partition_name", for example "0.1#misc". devicenum and
 730  * hwpartnum are both optional, defaulting to 0. If the partition is found,
 731  * sets desc and part_info accordingly with the information of the
 732  * partition with the given partition_name.
 733  *
 734  * @param[in] dev_iface Device interface
 735  * @param[in] dev_part_str Input string argument, like "0.1#misc"
 736  * @param[out] desc Place to store the device description pointer
 737  * @param[out] part_info Place to store the partition information
 738  * Return: 0 on success, or a negative on error
 739  */
 740 static int part_get_info_by_dev_and_name(const char *dev_iface,
 741                                          const char *dev_part_str,
 742                                          struct blk_desc **desc,
 743                                          struct disk_partition *part_info)
 744 {
 745         char *dup_str = NULL;
 746         const char *dev_str, *part_str;
 747         int ret;
 748
 749         /* Separate device and partition name specification */
 750         if (dev_part_str)
 751                 part_str = strchr(dev_part_str, '#');
 752         else
 753                 part_str = NULL;
 754
 755         if (part_str) {
 756                 dup_str = strdup(dev_part_str);
 757                 dup_str[part_str - dev_part_str] = 0;
 758                 dev_str = dup_str;
 759                 part_str++;
 760         } else {
 761                 return -EINVAL;
 762         }
 763
 764         ret = blk_get_device_by_str(dev_iface, dev_str, desc);
 765         if (ret < 0)
 766                 goto cleanup;
 767
 768         ret = part_get_info_by_name(*desc, part_str, part_info);
 769         if (ret < 0)
 770                 printf("Could not find \"%s\" partition\n", part_str);
 771
 772 cleanup:
 773         free(dup_str);
 774         return ret;
 775 }
 776
 777 int part_get_info_by_dev_and_name_or_num(const char *dev_iface,
 778                                          const char *dev_part_str,
 779                                          struct blk_desc **desc,
 780                                          struct disk_partition *part_info,
 781                                          int allow_whole_dev)
 782 {
 783         int ret;
 784
 785         /* Split the part_name if passed as "$dev_num#part_name". */
 786         ret = part_get_info_by_dev_and_name(dev_iface, dev_part_str, desc,
 787                                             part_info);
 788         if (ret >= 0)
 789                 return ret;
 790         /*
 791          * Couldn't lookup by name, try looking up the partition description
 792          * directly.
 793          */
 794         ret = blk_get_device_part_str(dev_iface, dev_part_str, desc, part_info,
 795                                       allow_whole_dev);
 796         if (ret < 0)
 797                 printf("Couldn't find partition %s %s\n",
 798                        dev_iface, dev_part_str);
 799         return ret;
 800 }
 801
 802 void part_set_generic_name(const struct blk_desc *desc, int part_num,
 803                            char *name)
 804 {
 805         char *devtype;
 806
 807         switch (desc->uclass_id) {
 808         case UCLASS_IDE:
 809         case UCLASS_AHCI:
 810                 devtype = "hd";
 811                 break;
 812         case UCLASS_SCSI:
 813                 devtype = "sd";
 814                 break;
 815         case UCLASS_USB:
 816                 devtype = "usbd";
 817                 break;
 818         case UCLASS_MMC:
 819                 devtype = "mmcsd";
 820                 break;
 821         default:
 822                 devtype = "xx";
 823                 break;
 824         }
 825
 826         sprintf(name, "%s%c%d", devtype, 'a' + desc->devnum, part_num);
 827 }
 828
 829 int part_get_bootable(struct blk_desc *desc)
 830 {
 831         struct disk_partition info;
 832         int p;
 833
 834         for (p = 1; p <= MAX_SEARCH_PARTITIONS; p++) {
 835                 int ret;
 836
 837                 ret = part_get_info(desc, p, &info);
 838                 if (!ret && info.bootable)
 839                         return p;
 840         }
 841
 842         return 0;
 843 }