fs/fs.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * Copyright (c) 2012, NVIDIA CORPORATION.  All rights reserved.
   4  */
   5
   6 #include <config.h>
   7 #include <errno.h>
   8 #include <common.h>
   9 #include <mapmem.h>
  10 #include <part.h>
  11 #include <ext4fs.h>
  12 #include <fat.h>
  13 #include <fs.h>
  14 #include <sandboxfs.h>
  15 #include <ubifs_uboot.h>
  16 #include <btrfs.h>
  17 #include <asm/io.h>
  18 #include <div64.h>
  19 #include <linux/math64.h>
  20
  21 DECLARE_GLOBAL_DATA_PTR;
  22
  23 static struct blk_desc *fs_dev_desc;
  24 static int fs_dev_part;
  25 static disk_partition_t fs_partition;
  26 static int fs_type = FS_TYPE_ANY;
  27
  28 static inline int fs_probe_unsupported(struct blk_desc *fs_dev_desc,
  29                                       disk_partition_t *fs_partition)
  30 {
  31         printf("** Unrecognized filesystem type **\n");
  32         return -1;
  33 }
  34
  35 static inline int fs_ls_unsupported(const char *dirname)
  36 {
  37         return -1;
  38 }
  39
  40 /* generic implementation of ls in terms of opendir/readdir/closedir */
  41 __maybe_unused
  42 static int fs_ls_generic(const char *dirname)
  43 {
  44         struct fs_dir_stream *dirs;
  45         struct fs_dirent *dent;
  46         int nfiles = 0, ndirs = 0;
  47
  48         dirs = fs_opendir(dirname);
  49         if (!dirs)
  50                 return -errno;
  51
  52         while ((dent = fs_readdir(dirs))) {
  53                 if (dent->type == FS_DT_DIR) {
  54                         printf("            %s/\n", dent->name);
  55                         ndirs++;
  56                 } else {
  57                         printf(" %8lld   %s\n", dent->size, dent->name);
  58                         nfiles++;
  59                 }
  60         }
  61
  62         fs_closedir(dirs);
  63
  64         printf("\n%d file(s), %d dir(s)\n\n", nfiles, ndirs);
  65
  66         return 0;
  67 }
  68
  69 static inline int fs_exists_unsupported(const char *filename)
  70 {
  71         return 0;
  72 }
  73
  74 static inline int fs_size_unsupported(const char *filename, loff_t *size)
  75 {
  76         return -1;
  77 }
  78
  79 static inline int fs_read_unsupported(const char *filename, void *buf,
  80                                       loff_t offset, loff_t len,
  81                                       loff_t *actread)
  82 {
  83         return -1;
  84 }
  85
  86 static inline int fs_write_unsupported(const char *filename, void *buf,
  87                                       loff_t offset, loff_t len,
  88                                       loff_t *actwrite)
  89 {
  90         return -1;
  91 }
  92
  93 static inline void fs_close_unsupported(void)
  94 {
  95 }
  96
  97 static inline int fs_uuid_unsupported(char *uuid_str)
  98 {
  99         return -1;
 100 }
 101
 102 static inline int fs_opendir_unsupported(const char *filename,
 103                                          struct fs_dir_stream **dirs)
 104 {
 105         return -EACCES;
 106 }
 107
 108 static inline int fs_unlink_unsupported(const char *filename)
 109 {
 110         return -1;
 111 }
 112
 113 static inline int fs_mkdir_unsupported(const char *dirname)
 114 {
 115         return -1;
 116 }
 117
 118 struct fstype_info {
 119         int fstype;
 120         char *name;
 121         /*
 122          * Is it legal to pass NULL as .probe()'s  fs_dev_desc parameter? This
 123          * should be false in most cases. For "virtual" filesystems which
 124          * aren't based on a U-Boot block device (e.g. sandbox), this can be
 125          * set to true. This should also be true for the dummy entry at the end
 126          * of fstypes[], since that is essentially a "virtual" (non-existent)
 127          * filesystem.
 128          */
 129         bool null_dev_desc_ok;
 130         int (*probe)(struct blk_desc *fs_dev_desc,
 131                      disk_partition_t *fs_partition);
 132         int (*ls)(const char *dirname);
 133         int (*exists)(const char *filename);
 134         int (*size)(const char *filename, loff_t *size);
 135         int (*read)(const char *filename, void *buf, loff_t offset,
 136                     loff_t len, loff_t *actread);
 137         int (*write)(const char *filename, void *buf, loff_t offset,
 138                      loff_t len, loff_t *actwrite);
 139         void (*close)(void);
 140         int (*uuid)(char *uuid_str);
 141         /*
 142          * Open a directory stream.  On success return 0 and directory
 143          * stream pointer via 'dirsp'.  On error, return -errno.  See
 144          * fs_opendir().
 145          */
 146         int (*opendir)(const char *filename, struct fs_dir_stream **dirsp);
 147         /*
 148          * Read next entry from directory stream.  On success return 0
 149          * and directory entry pointer via 'dentp'.  On error return
 150          * -errno.  See fs_readdir().
 151          */
 152         int (*readdir)(struct fs_dir_stream *dirs, struct fs_dirent **dentp);
 153         /* see fs_closedir() */
 154         void (*closedir)(struct fs_dir_stream *dirs);
 155         int (*unlink)(const char *filename);
 156         int (*mkdir)(const char *dirname);
 157 };
 158
 159 static struct fstype_info fstypes[] = {
 160 #ifdef CONFIG_FS_FAT
 161         {
 162                 .fstype = FS_TYPE_FAT,
 163                 .name = "fat",
 164                 .null_dev_desc_ok = false,
 165                 .probe = fat_set_blk_dev,
 166                 .close = fat_close,
 167                 .ls = fs_ls_generic,
 168                 .exists = fat_exists,
 169                 .size = fat_size,
 170                 .read = fat_read_file,
 171 #if CONFIG_IS_ENABLED(FAT_WRITE)
 172                 .write = file_fat_write,
 173                 .unlink = fat_unlink,
 174                 .mkdir = fat_mkdir,
 175 #else
 176                 .write = fs_write_unsupported,
 177                 .unlink = fs_unlink_unsupported,
 178                 .mkdir = fs_mkdir_unsupported,
 179 #endif
 180                 .uuid = fs_uuid_unsupported,
 181                 .opendir = fat_opendir,
 182                 .readdir = fat_readdir,
 183                 .closedir = fat_closedir,
 184         },
 185 #endif
 186
 187 #if CONFIG_IS_ENABLED(FS_EXT4)
 188         {
 189                 .fstype = FS_TYPE_EXT,
 190                 .name = "ext4",
 191                 .null_dev_desc_ok = false,
 192                 .probe = ext4fs_probe,
 193                 .close = ext4fs_close,
 194                 .ls = ext4fs_ls,
 195                 .exists = ext4fs_exists,
 196                 .size = ext4fs_size,
 197                 .read = ext4_read_file,
 198 #ifdef CONFIG_CMD_EXT4_WRITE
 199                 .write = ext4_write_file,
 200 #else
 201                 .write = fs_write_unsupported,
 202 #endif
 203                 .uuid = ext4fs_uuid,
 204                 .opendir = fs_opendir_unsupported,
 205                 .unlink = fs_unlink_unsupported,
 206                 .mkdir = fs_mkdir_unsupported,
 207         },
 208 #endif
 209 #ifdef CONFIG_SANDBOX
 210         {
 211                 .fstype = FS_TYPE_SANDBOX,
 212                 .name = "sandbox",
 213                 .null_dev_desc_ok = true,
 214                 .probe = sandbox_fs_set_blk_dev,
 215                 .close = sandbox_fs_close,
 216                 .ls = sandbox_fs_ls,
 217                 .exists = sandbox_fs_exists,
 218                 .size = sandbox_fs_size,
 219                 .read = fs_read_sandbox,
 220                 .write = fs_write_sandbox,
 221                 .uuid = fs_uuid_unsupported,
 222                 .opendir = fs_opendir_unsupported,
 223                 .unlink = fs_unlink_unsupported,
 224                 .mkdir = fs_mkdir_unsupported,
 225         },
 226 #endif
 227 #ifdef CONFIG_CMD_UBIFS
 228         {
 229                 .fstype = FS_TYPE_UBIFS,
 230                 .name = "ubifs",
 231                 .null_dev_desc_ok = true,
 232                 .probe = ubifs_set_blk_dev,
 233                 .close = ubifs_close,
 234                 .ls = ubifs_ls,
 235                 .exists = ubifs_exists,
 236                 .size = ubifs_size,
 237                 .read = ubifs_read,
 238                 .write = fs_write_unsupported,
 239                 .uuid = fs_uuid_unsupported,
 240                 .opendir = fs_opendir_unsupported,
 241                 .unlink = fs_unlink_unsupported,
 242                 .mkdir = fs_mkdir_unsupported,
 243         },
 244 #endif
 245 #ifdef CONFIG_FS_BTRFS
 246         {
 247                 .fstype = FS_TYPE_BTRFS,
 248                 .name = "btrfs",
 249                 .null_dev_desc_ok = false,
 250                 .probe = btrfs_probe,
 251                 .close = btrfs_close,
 252                 .ls = btrfs_ls,
 253                 .exists = btrfs_exists,
 254                 .size = btrfs_size,
 255                 .read = btrfs_read,
 256                 .write = fs_write_unsupported,
 257                 .uuid = btrfs_uuid,
 258                 .opendir = fs_opendir_unsupported,
 259                 .unlink = fs_unlink_unsupported,
 260                 .mkdir = fs_mkdir_unsupported,
 261         },
 262 #endif
 263         {
 264                 .fstype = FS_TYPE_ANY,
 265                 .name = "unsupported",
 266                 .null_dev_desc_ok = true,
 267                 .probe = fs_probe_unsupported,
 268                 .close = fs_close_unsupported,
 269                 .ls = fs_ls_unsupported,
 270                 .exists = fs_exists_unsupported,
 271                 .size = fs_size_unsupported,
 272                 .read = fs_read_unsupported,
 273                 .write = fs_write_unsupported,
 274                 .uuid = fs_uuid_unsupported,
 275                 .opendir = fs_opendir_unsupported,
 276                 .unlink = fs_unlink_unsupported,
 277                 .mkdir = fs_mkdir_unsupported,
 278         },
 279 };
 280
 281 static struct fstype_info *fs_get_info(int fstype)
 282 {
 283         struct fstype_info *info;
 284         int i;
 285
 286         for (i = 0, info = fstypes; i < ARRAY_SIZE(fstypes) - 1; i++, info++) {
 287                 if (fstype == info->fstype)
 288                         return info;
 289         }
 290
 291         /* Return the 'unsupported' sentinel */
 292         return info;
 293 }
 294
 295 /**
 296  * fs_get_type_name() - Get type of current filesystem
 297  *
 298  * Return: Pointer to filesystem name
 299  *
 300  * Returns a string describing the current filesystem, or the sentinel
 301  * "unsupported" for any unrecognised filesystem.
 302  */
 303 const char *fs_get_type_name(void)
 304 {
 305         return fs_get_info(fs_type)->name;
 306 }
 307
 308 int fs_set_blk_dev(const char *ifname, const char *dev_part_str, int fstype)
 309 {
 310         struct fstype_info *info;
 311         int part, i;
 312 #ifdef CONFIG_NEEDS_MANUAL_RELOC
 313         static int relocated;
 314
 315         if (!relocated) {
 316                 for (i = 0, info = fstypes; i < ARRAY_SIZE(fstypes);
 317                                 i++, info++) {
 318                         info->name += gd->reloc_off;
 319                         info->probe += gd->reloc_off;
 320                         info->close += gd->reloc_off;
 321                         info->ls += gd->reloc_off;
 322                         info->read += gd->reloc_off;
 323                         info->write += gd->reloc_off;
 324                 }
 325                 relocated = 1;
 326         }
 327 #endif
 328
 329         part = blk_get_device_part_str(ifname, dev_part_str, &fs_dev_desc,
 330                                         &fs_partition, 1);
 331         if (part < 0)
 332                 return -1;
 333
 334         for (i = 0, info = fstypes; i < ARRAY_SIZE(fstypes); i++, info++) {
 335                 if (fstype != FS_TYPE_ANY && info->fstype != FS_TYPE_ANY &&
 336                                 fstype != info->fstype)
 337                         continue;
 338
 339                 if (!fs_dev_desc && !info->null_dev_desc_ok)
 340                         continue;
 341
 342                 if (!info->probe(fs_dev_desc, &fs_partition)) {
 343                         fs_type = info->fstype;
 344                         fs_dev_part = part;
 345                         return 0;
 346                 }
 347         }
 348
 349         return -1;
 350 }
 351
 352 /* set current blk device w/ blk_desc + partition # */
 353 int fs_set_blk_dev_with_part(struct blk_desc *desc, int part)
 354 {
 355         struct fstype_info *info;
 356         int ret, i;
 357
 358         if (part >= 1)
 359                 ret = part_get_info(desc, part, &fs_partition);
 360         else
 361                 ret = part_get_info_whole_disk(desc, &fs_partition);
 362         if (ret)
 363                 return ret;
 364         fs_dev_desc = desc;
 365
 366         for (i = 0, info = fstypes; i < ARRAY_SIZE(fstypes); i++, info++) {
 367                 if (!info->probe(fs_dev_desc, &fs_partition)) {
 368                         fs_type = info->fstype;
 369                         fs_dev_part = part;
 370                         return 0;
 371                 }
 372         }
 373
 374         return -1;
 375 }
 376
 377 static void fs_close(void)
 378 {
 379         struct fstype_info *info = fs_get_info(fs_type);
 380
 381         info->close();
 382
 383         fs_type = FS_TYPE_ANY;
 384 }
 385
 386 int fs_uuid(char *uuid_str)
 387 {
 388         struct fstype_info *info = fs_get_info(fs_type);
 389
 390         return info->uuid(uuid_str);
 391 }
 392
 393 int fs_ls(const char *dirname)
 394 {
 395         int ret;
 396
 397         struct fstype_info *info = fs_get_info(fs_type);
 398
 399         ret = info->ls(dirname);
 400
 401         fs_type = FS_TYPE_ANY;
 402         fs_close();
 403
 404         return ret;
 405 }
 406
 407 int fs_exists(const char *filename)
 408 {
 409         int ret;
 410
 411         struct fstype_info *info = fs_get_info(fs_type);
 412
 413         ret = info->exists(filename);
 414
 415         fs_close();
 416
 417         return ret;
 418 }
 419
 420 int fs_size(const char *filename, loff_t *size)
 421 {
 422         int ret;
 423
 424         struct fstype_info *info = fs_get_info(fs_type);
 425
 426         ret = info->size(filename, size);
 427
 428         fs_close();
 429
 430         return ret;
 431 }
 432
 433 #ifdef CONFIG_LMB
 434 /* Check if a file may be read to the given address */
 435 static int fs_read_lmb_check(const char *filename, ulong addr, loff_t offset,
 436                              loff_t len, struct fstype_info *info)
 437 {
 438         struct lmb lmb;
 439         int ret;
 440         loff_t size;
 441         loff_t read_len;
 442
 443         /* get the actual size of the file */
 444         ret = info->size(filename, &size);
 445         if (ret)
 446                 return ret;
 447         if (offset >= size) {
 448                 /* offset >= EOF, no bytes will be written */
 449                 return 0;
 450         }
 451         read_len = size - offset;
 452
 453         /* limit to 'len' if it is smaller */
 454         if (len && len < read_len)
 455                 read_len = len;
 456
 457         lmb_init_and_reserve(&lmb, gd->bd, (void *)gd->fdt_blob);
 458         lmb_dump_all(&lmb);
 459
 460         if (lmb_alloc_addr(&lmb, addr, read_len) == addr)
 461                 return 0;
 462
 463         printf("** Reading file would overwrite reserved memory **\n");
 464         return -ENOSPC;
 465 }
 466 #endif
 467
 468 static int _fs_read(const char *filename, ulong addr, loff_t offset, loff_t len,
 469                     int do_lmb_check, loff_t *actread)
 470 {
 471         struct fstype_info *info = fs_get_info(fs_type);
 472         void *buf;
 473         int ret;
 474
 475 #ifdef CONFIG_LMB
 476         if (do_lmb_check) {
 477                 ret = fs_read_lmb_check(filename, addr, offset, len, info);
 478                 if (ret)
 479                         return ret;
 480         }
 481 #endif
 482
 483         /*
 484          * We don't actually know how many bytes are being read, since len==0
 485          * means read the whole file.
 486          */
 487         buf = map_sysmem(addr, len);
 488         ret = info->read(filename, buf, offset, len, actread);
 489         unmap_sysmem(buf);
 490
 491         /* If we requested a specific number of bytes, check we got it */
 492         if (ret == 0 && len && *actread != len)
 493                 debug("** %s shorter than offset + len **\n", filename);
 494         fs_close();
 495
 496         return ret;
 497 }
 498
 499 int fs_read(const char *filename, ulong addr, loff_t offset, loff_t len,
 500             loff_t *actread)
 501 {
 502         return _fs_read(filename, addr, offset, len, 0, actread);
 503 }
 504
 505 int fs_write(const char *filename, ulong addr, loff_t offset, loff_t len,
 506              loff_t *actwrite)
 507 {
 508         struct fstype_info *info = fs_get_info(fs_type);
 509         void *buf;
 510         int ret;
 511
 512         buf = map_sysmem(addr, len);
 513         ret = info->write(filename, buf, offset, len, actwrite);
 514         unmap_sysmem(buf);
 515
 516         if (ret < 0 && len != *actwrite) {
 517                 printf("** Unable to write file %s **\n", filename);
 518                 ret = -1;
 519         }
 520         fs_close();
 521
 522         return ret;
 523 }
 524
 525 struct fs_dir_stream *fs_opendir(const char *filename)
 526 {
 527         struct fstype_info *info = fs_get_info(fs_type);
 528         struct fs_dir_stream *dirs = NULL;
 529         int ret;
 530
 531         ret = info->opendir(filename, &dirs);
 532         fs_close();
 533         if (ret) {
 534                 errno = -ret;
 535                 return NULL;
 536         }
 537
 538         dirs->desc = fs_dev_desc;
 539         dirs->part = fs_dev_part;
 540
 541         return dirs;
 542 }
 543
 544 struct fs_dirent *fs_readdir(struct fs_dir_stream *dirs)
 545 {
 546         struct fstype_info *info;
 547         struct fs_dirent *dirent;
 548         int ret;
 549
 550         fs_set_blk_dev_with_part(dirs->desc, dirs->part);
 551         info = fs_get_info(fs_type);
 552
 553         ret = info->readdir(dirs, &dirent);
 554         fs_close();
 555         if (ret) {
 556                 errno = -ret;
 557                 return NULL;
 558         }
 559
 560         return dirent;
 561 }
 562
 563 void fs_closedir(struct fs_dir_stream *dirs)
 564 {
 565         struct fstype_info *info;
 566
 567         if (!dirs)
 568                 return;
 569
 570         fs_set_blk_dev_with_part(dirs->desc, dirs->part);
 571         info = fs_get_info(fs_type);
 572
 573         info->closedir(dirs);
 574         fs_close();
 575 }
 576
 577 int fs_unlink(const char *filename)
 578 {
 579         int ret;
 580
 581         struct fstype_info *info = fs_get_info(fs_type);
 582
 583         ret = info->unlink(filename);
 584
 585         fs_type = FS_TYPE_ANY;
 586         fs_close();
 587
 588         return ret;
 589 }
 590
 591 int fs_mkdir(const char *dirname)
 592 {
 593         int ret;
 594
 595         struct fstype_info *info = fs_get_info(fs_type);
 596
 597         ret = info->mkdir(dirname);
 598
 599         fs_type = FS_TYPE_ANY;
 600         fs_close();
 601
 602         return ret;
 603 }
 604
 605 int do_size(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[],
 606                 int fstype)
 607 {
 608         loff_t size;
 609
 610         if (argc != 4)
 611                 return CMD_RET_USAGE;
 612
 613         if (fs_set_blk_dev(argv[1], argv[2], fstype))
 614                 return 1;
 615
 616         if (fs_size(argv[3], &size) < 0)
 617                 return CMD_RET_FAILURE;
 618
 619         env_set_hex("filesize", size);
 620
 621         return 0;
 622 }
 623
 624 int do_load(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[],
 625                 int fstype)
 626 {
 627         unsigned long addr;
 628         const char *addr_str;
 629         const char *filename;
 630         loff_t bytes;
 631         loff_t pos;
 632         loff_t len_read;
 633         int ret;
 634         unsigned long time;
 635         char *ep;
 636
 637         if (argc < 2)
 638                 return CMD_RET_USAGE;
 639         if (argc > 7)
 640                 return CMD_RET_USAGE;
 641
 642         if (fs_set_blk_dev(argv[1], (argc >= 3) ? argv[2] : NULL, fstype))
 643                 return 1;
 644
 645         if (argc >= 4) {
 646                 addr = simple_strtoul(argv[3], &ep, 16);
 647                 if (ep == argv[3] || *ep != '\0')
 648                         return CMD_RET_USAGE;
 649         } else {
 650                 addr_str = env_get("loadaddr");
 651                 if (addr_str != NULL)
 652                         addr = simple_strtoul(addr_str, NULL, 16);
 653                 else
 654                         addr = CONFIG_SYS_LOAD_ADDR;
 655         }
 656         if (argc >= 5) {
 657                 filename = argv[4];
 658         } else {
 659                 filename = env_get("bootfile");
 660                 if (!filename) {
 661                         puts("** No boot file defined **\n");
 662                         return 1;
 663                 }
 664         }
 665         if (argc >= 6)
 666                 bytes = simple_strtoul(argv[5], NULL, 16);
 667         else
 668                 bytes = 0;
 669         if (argc >= 7)
 670                 pos = simple_strtoul(argv[6], NULL, 16);
 671         else
 672                 pos = 0;
 673
 674         time = get_timer(0);
 675         ret = _fs_read(filename, addr, pos, bytes, 1, &len_read);
 676         time = get_timer(time);
 677         if (ret < 0)
 678                 return 1;
 679
 680         printf("%llu bytes read in %lu ms", len_read, time);
 681         if (time > 0) {
 682                 puts(" (");
 683                 print_size(div_u64(len_read, time) * 1000, "/s");
 684                 puts(")");
 685         }
 686         puts("\n");
 687
 688         env_set_hex("fileaddr", addr);
 689         env_set_hex("filesize", len_read);
 690
 691         return 0;
 692 }
 693
 694 int do_ls(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[],
 695         int fstype)
 696 {
 697         if (argc < 2)
 698                 return CMD_RET_USAGE;
 699         if (argc > 4)
 700                 return CMD_RET_USAGE;
 701
 702         if (fs_set_blk_dev(argv[1], (argc >= 3) ? argv[2] : NULL, fstype))
 703                 return 1;
 704
 705         if (fs_ls(argc >= 4 ? argv[3] : "/"))
 706                 return 1;
 707
 708         return 0;
 709 }
 710
 711 int file_exists(const char *dev_type, const char *dev_part, const char *file,
 712                 int fstype)
 713 {
 714         if (fs_set_blk_dev(dev_type, dev_part, fstype))
 715                 return 0;
 716
 717         return fs_exists(file);
 718 }
 719
 720 int do_save(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[],
 721                 int fstype)
 722 {
 723         unsigned long addr;
 724         const char *filename;
 725         loff_t bytes;
 726         loff_t pos;
 727         loff_t len;
 728         int ret;
 729         unsigned long time;
 730
 731         if (argc < 6 || argc > 7)
 732                 return CMD_RET_USAGE;
 733
 734         if (fs_set_blk_dev(argv[1], argv[2], fstype))
 735                 return 1;
 736
 737         addr = simple_strtoul(argv[3], NULL, 16);
 738         filename = argv[4];
 739         bytes = simple_strtoul(argv[5], NULL, 16);
 740         if (argc >= 7)
 741                 pos = simple_strtoul(argv[6], NULL, 16);
 742         else
 743                 pos = 0;
 744
 745         time = get_timer(0);
 746         ret = fs_write(filename, addr, pos, bytes, &len);
 747         time = get_timer(time);
 748         if (ret < 0)
 749                 return 1;
 750
 751         printf("%llu bytes written in %lu ms", len, time);
 752         if (time > 0) {
 753                 puts(" (");
 754                 print_size(div_u64(len, time) * 1000, "/s");
 755                 puts(")");
 756         }
 757         puts("\n");
 758
 759         return 0;
 760 }
 761
 762 int do_fs_uuid(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[],
 763                 int fstype)
 764 {
 765         int ret;
 766         char uuid[37];
 767         memset(uuid, 0, sizeof(uuid));
 768
 769         if (argc < 3 || argc > 4)
 770                 return CMD_RET_USAGE;
 771
 772         if (fs_set_blk_dev(argv[1], argv[2], fstype))
 773                 return 1;
 774
 775         ret = fs_uuid(uuid);
 776         if (ret)
 777                 return CMD_RET_FAILURE;
 778
 779         if (argc == 4)
 780                 env_set(argv[3], uuid);
 781         else
 782                 printf("%s\n", uuid);
 783
 784         return CMD_RET_SUCCESS;
 785 }
 786
 787 int do_fs_type(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
 788 {
 789         struct fstype_info *info;
 790
 791         if (argc < 3 || argc > 4)
 792                 return CMD_RET_USAGE;
 793
 794         if (fs_set_blk_dev(argv[1], argv[2], FS_TYPE_ANY))
 795                 return 1;
 796
 797         info = fs_get_info(fs_type);
 798
 799         if (argc == 4)
 800                 env_set(argv[3], info->name);
 801         else
 802                 printf("%s\n", info->name);
 803
 804         fs_close();
 805
 806         return CMD_RET_SUCCESS;
 807 }
 808
 809 int do_rm(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[],
 810           int fstype)
 811 {
 812         if (argc != 4)
 813                 return CMD_RET_USAGE;
 814
 815         if (fs_set_blk_dev(argv[1], argv[2], fstype))
 816                 return 1;
 817
 818         if (fs_unlink(argv[3]))
 819                 return 1;
 820
 821         return 0;
 822 }
 823
 824 int do_mkdir(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[],
 825              int fstype)
 826 {
 827         int ret;
 828
 829         if (argc != 4)
 830                 return CMD_RET_USAGE;
 831
 832         if (fs_set_blk_dev(argv[1], argv[2], fstype))
 833                 return 1;
 834
 835         ret = fs_mkdir(argv[3]);
 836         if (ret) {
 837                 printf("** Unable to create a directory \"%s\" **\n", argv[3]);
 838                 return 1;
 839         }
 840
 841         return 0;
 842 }