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