fs/fs.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * Copyright (c) 2012, NVIDIA CORPORATION.  All rights reserved.
   4  */
   5
   6 #define LOG_CATEGORY LOGC_CORE
   7
   8 #include <command.h>
   9 #include <config.h>
  10 #include <errno.h>
  11 #include <common.h>
  12 #include <env.h>
  13 #include <lmb.h>
  14 #include <log.h>
  15 #include <mapmem.h>
  16 #include <part.h>
  17 #include <ext4fs.h>
  18 #include <fat.h>
  19 #include <fs.h>
  20 #include <sandboxfs.h>
  21 #include <ubifs_uboot.h>
  22 #include <btrfs.h>
  23 #include <asm/io.h>
  24 #include <div64.h>
  25 #include <linux/math64.h>
  26 #include <efi_loader.h>
  27 #include <squashfs.h>
  28
  29 DECLARE_GLOBAL_DATA_PTR;
  30
  31 static struct blk_desc *fs_dev_desc;
  32 static int fs_dev_part;
  33 static struct disk_partition fs_partition;
  34 static int fs_type = FS_TYPE_ANY;
  35
  36 static inline int fs_probe_unsupported(struct blk_desc *fs_dev_desc,
  37                                       struct disk_partition *fs_partition)
  38 {
  39         log_err("** Unrecognized filesystem type **\n");
  40         return -1;
  41 }
  42
  43 static inline int fs_ls_unsupported(const char *dirname)
  44 {
  45         return -1;
  46 }
  47
  48 /* generic implementation of ls in terms of opendir/readdir/closedir */
  49 __maybe_unused
  50 static int fs_ls_generic(const char *dirname)
  51 {
  52         struct fs_dir_stream *dirs;
  53         struct fs_dirent *dent;
  54         int nfiles = 0, ndirs = 0;
  55
  56         dirs = fs_opendir(dirname);
  57         if (!dirs)
  58                 return -errno;
  59
  60         while ((dent = fs_readdir(dirs))) {
  61                 if (dent->type == FS_DT_DIR) {
  62                         printf("            %s/\n", dent->name);
  63                         ndirs++;
  64                 } else if (dent->type == FS_DT_LNK) {
  65                         printf("    <SYM>   %s\n", dent->name);
  66                         nfiles++;
  67                 } else {
  68                         printf(" %8lld   %s\n", dent->size, dent->name);
  69                         nfiles++;
  70                 }
  71         }
  72
  73         fs_closedir(dirs);
  74
  75         printf("\n%d file(s), %d dir(s)\n\n", nfiles, ndirs);
  76
  77         return 0;
  78 }
  79
  80 static inline int fs_exists_unsupported(const char *filename)
  81 {
  82         return 0;
  83 }
  84
  85 static inline int fs_size_unsupported(const char *filename, loff_t *size)
  86 {
  87         return -1;
  88 }
  89
  90 static inline int fs_read_unsupported(const char *filename, void *buf,
  91                                       loff_t offset, loff_t len,
  92                                       loff_t *actread)
  93 {
  94         return -1;
  95 }
  96
  97 static inline int fs_write_unsupported(const char *filename, void *buf,
  98                                       loff_t offset, loff_t len,
  99                                       loff_t *actwrite)
 100 {
 101         return -1;
 102 }
 103
 104 static inline int fs_ln_unsupported(const char *filename, const char *target)
 105 {
 106         return -1;
 107 }
 108
 109 static inline void fs_close_unsupported(void)
 110 {
 111 }
 112
 113 static inline int fs_uuid_unsupported(char *uuid_str)
 114 {
 115         return -1;
 116 }
 117
 118 static inline int fs_opendir_unsupported(const char *filename,
 119                                          struct fs_dir_stream **dirs)
 120 {
 121         return -EACCES;
 122 }
 123
 124 static inline int fs_unlink_unsupported(const char *filename)
 125 {
 126         return -1;
 127 }
 128
 129 static inline int fs_mkdir_unsupported(const char *dirname)
 130 {
 131         return -1;
 132 }
 133
 134 struct fstype_info {
 135         int fstype;
 136         char *name;
 137         /*
 138          * Is it legal to pass NULL as .probe()'s  fs_dev_desc parameter? This
 139          * should be false in most cases. For "virtual" filesystems which
 140          * aren't based on a U-Boot block device (e.g. sandbox), this can be
 141          * set to true. This should also be true for the dummy entry at the end
 142          * of fstypes[], since that is essentially a "virtual" (non-existent)
 143          * filesystem.
 144          */
 145         bool null_dev_desc_ok;
 146         int (*probe)(struct blk_desc *fs_dev_desc,
 147                      struct disk_partition *fs_partition);
 148         int (*ls)(const char *dirname);
 149         int (*exists)(const char *filename);
 150         int (*size)(const char *filename, loff_t *size);
 151         int (*read)(const char *filename, void *buf, loff_t offset,
 152                     loff_t len, loff_t *actread);
 153         int (*write)(const char *filename, void *buf, loff_t offset,
 154                      loff_t len, loff_t *actwrite);
 155         void (*close)(void);
 156         int (*uuid)(char *uuid_str);
 157         /*
 158          * Open a directory stream.  On success return 0 and directory
 159          * stream pointer via 'dirsp'.  On error, return -errno.  See
 160          * fs_opendir().
 161          */
 162         int (*opendir)(const char *filename, struct fs_dir_stream **dirsp);
 163         /*
 164          * Read next entry from directory stream.  On success return 0
 165          * and directory entry pointer via 'dentp'.  On error return
 166          * -errno.  See fs_readdir().
 167          */
 168         int (*readdir)(struct fs_dir_stream *dirs, struct fs_dirent **dentp);
 169         /* see fs_closedir() */
 170         void (*closedir)(struct fs_dir_stream *dirs);
 171         int (*unlink)(const char *filename);
 172         int (*mkdir)(const char *dirname);
 173         int (*ln)(const char *filename, const char *target);
 174 };
 175
 176 static struct fstype_info fstypes[] = {
 177 #ifdef CONFIG_FS_FAT
 178         {
 179                 .fstype = FS_TYPE_FAT,
 180                 .name = "fat",
 181                 .null_dev_desc_ok = false,
 182                 .probe = fat_set_blk_dev,
 183                 .close = fat_close,
 184                 .ls = fs_ls_generic,
 185                 .exists = fat_exists,
 186                 .size = fat_size,
 187                 .read = fat_read_file,
 188 #if CONFIG_IS_ENABLED(FAT_WRITE)
 189                 .write = file_fat_write,
 190                 .unlink = fat_unlink,
 191                 .mkdir = fat_mkdir,
 192 #else
 193                 .write = fs_write_unsupported,
 194                 .unlink = fs_unlink_unsupported,
 195                 .mkdir = fs_mkdir_unsupported,
 196 #endif
 197                 .uuid = fat_uuid,
 198                 .opendir = fat_opendir,
 199                 .readdir = fat_readdir,
 200                 .closedir = fat_closedir,
 201                 .ln = fs_ln_unsupported,
 202         },
 203 #endif
 204
 205 #if CONFIG_IS_ENABLED(FS_EXT4)
 206         {
 207                 .fstype = FS_TYPE_EXT,
 208                 .name = "ext4",
 209                 .null_dev_desc_ok = false,
 210                 .probe = ext4fs_probe,
 211                 .close = ext4fs_close,
 212                 .ls = ext4fs_ls,
 213                 .exists = ext4fs_exists,
 214                 .size = ext4fs_size,
 215                 .read = ext4_read_file,
 216 #ifdef CONFIG_CMD_EXT4_WRITE
 217                 .write = ext4_write_file,
 218                 .ln = ext4fs_create_link,
 219 #else
 220                 .write = fs_write_unsupported,
 221                 .ln = fs_ln_unsupported,
 222 #endif
 223                 .uuid = ext4fs_uuid,
 224                 .opendir = fs_opendir_unsupported,
 225                 .unlink = fs_unlink_unsupported,
 226                 .mkdir = fs_mkdir_unsupported,
 227         },
 228 #endif
 229 #ifdef CONFIG_SANDBOX
 230         {
 231                 .fstype = FS_TYPE_SANDBOX,
 232                 .name = "sandbox",
 233                 .null_dev_desc_ok = true,
 234                 .probe = sandbox_fs_set_blk_dev,
 235                 .close = sandbox_fs_close,
 236                 .ls = sandbox_fs_ls,
 237                 .exists = sandbox_fs_exists,
 238                 .size = sandbox_fs_size,
 239                 .read = fs_read_sandbox,
 240                 .write = fs_write_sandbox,
 241                 .uuid = fs_uuid_unsupported,
 242                 .opendir = fs_opendir_unsupported,
 243                 .unlink = fs_unlink_unsupported,
 244                 .mkdir = fs_mkdir_unsupported,
 245                 .ln = fs_ln_unsupported,
 246         },
 247 #endif
 248 #ifdef CONFIG_CMD_UBIFS
 249         {
 250                 .fstype = FS_TYPE_UBIFS,
 251                 .name = "ubifs",
 252                 .null_dev_desc_ok = true,
 253                 .probe = ubifs_set_blk_dev,
 254                 .close = ubifs_close,
 255                 .ls = ubifs_ls,
 256                 .exists = ubifs_exists,
 257                 .size = ubifs_size,
 258                 .read = ubifs_read,
 259                 .write = fs_write_unsupported,
 260                 .uuid = fs_uuid_unsupported,
 261                 .opendir = fs_opendir_unsupported,
 262                 .unlink = fs_unlink_unsupported,
 263                 .mkdir = fs_mkdir_unsupported,
 264                 .ln = fs_ln_unsupported,
 265         },
 266 #endif
 267 #ifdef CONFIG_FS_BTRFS
 268         {
 269                 .fstype = FS_TYPE_BTRFS,
 270                 .name = "btrfs",
 271                 .null_dev_desc_ok = false,
 272                 .probe = btrfs_probe,
 273                 .close = btrfs_close,
 274                 .ls = btrfs_ls,
 275                 .exists = btrfs_exists,
 276                 .size = btrfs_size,
 277                 .read = btrfs_read,
 278                 .write = fs_write_unsupported,
 279                 .uuid = btrfs_uuid,
 280                 .opendir = fs_opendir_unsupported,
 281                 .unlink = fs_unlink_unsupported,
 282                 .mkdir = fs_mkdir_unsupported,
 283                 .ln = fs_ln_unsupported,
 284         },
 285 #endif
 286 #if IS_ENABLED(CONFIG_FS_SQUASHFS)
 287         {
 288                 .fstype = FS_TYPE_SQUASHFS,
 289                 .name = "squashfs",
 290                 .null_dev_desc_ok = false,
 291                 .probe = sqfs_probe,
 292                 .opendir = sqfs_opendir,
 293                 .readdir = sqfs_readdir,
 294                 .ls = fs_ls_generic,
 295                 .read = sqfs_read,
 296                 .size = sqfs_size,
 297                 .close = sqfs_close,
 298                 .closedir = sqfs_closedir,
 299                 .exists = sqfs_exists,
 300                 .uuid = fs_uuid_unsupported,
 301                 .write = fs_write_unsupported,
 302                 .ln = fs_ln_unsupported,
 303                 .unlink = fs_unlink_unsupported,
 304                 .mkdir = fs_mkdir_unsupported,
 305         },
 306 #endif
 307         {
 308                 .fstype = FS_TYPE_ANY,
 309                 .name = "unsupported",
 310                 .null_dev_desc_ok = true,
 311                 .probe = fs_probe_unsupported,
 312                 .close = fs_close_unsupported,
 313                 .ls = fs_ls_unsupported,
 314                 .exists = fs_exists_unsupported,
 315                 .size = fs_size_unsupported,
 316                 .read = fs_read_unsupported,
 317                 .write = fs_write_unsupported,
 318                 .uuid = fs_uuid_unsupported,
 319                 .opendir = fs_opendir_unsupported,
 320                 .unlink = fs_unlink_unsupported,
 321                 .mkdir = fs_mkdir_unsupported,
 322                 .ln = fs_ln_unsupported,
 323         },
 324 };
 325
 326 static struct fstype_info *fs_get_info(int fstype)
 327 {
 328         struct fstype_info *info;
 329         int i;
 330
 331         for (i = 0, info = fstypes; i < ARRAY_SIZE(fstypes) - 1; i++, info++) {
 332                 if (fstype == info->fstype)
 333                         return info;
 334         }
 335
 336         /* Return the 'unsupported' sentinel */
 337         return info;
 338 }
 339
 340 /**
 341  * fs_get_type() - Get type of current filesystem
 342  *
 343  * Return: filesystem type
 344  *
 345  * Returns filesystem type representing the current filesystem, or
 346  * FS_TYPE_ANY for any unrecognised filesystem.
 347  */
 348 int fs_get_type(void)
 349 {
 350         return fs_type;
 351 }
 352
 353 /**
 354  * fs_get_type_name() - Get type of current filesystem
 355  *
 356  * Return: Pointer to filesystem name
 357  *
 358  * Returns a string describing the current filesystem, or the sentinel
 359  * "unsupported" for any unrecognised filesystem.
 360  */
 361 const char *fs_get_type_name(void)
 362 {
 363         return fs_get_info(fs_type)->name;
 364 }
 365
 366 int fs_set_blk_dev(const char *ifname, const char *dev_part_str, int fstype)
 367 {
 368         struct fstype_info *info;
 369         int part, i;
 370 #ifdef CONFIG_NEEDS_MANUAL_RELOC
 371         static int relocated;
 372
 373         if (!relocated) {
 374                 for (i = 0, info = fstypes; i < ARRAY_SIZE(fstypes);
 375                                 i++, info++) {
 376                         info->name += gd->reloc_off;
 377                         info->probe += gd->reloc_off;
 378                         info->close += gd->reloc_off;
 379                         info->ls += gd->reloc_off;
 380                         info->read += gd->reloc_off;
 381                         info->write += gd->reloc_off;
 382                 }
 383                 relocated = 1;
 384         }
 385 #endif
 386
 387         part = blk_get_device_part_str(ifname, dev_part_str, &fs_dev_desc,
 388                                         &fs_partition, 1);
 389         if (part < 0)
 390                 return -1;
 391
 392         for (i = 0, info = fstypes; i < ARRAY_SIZE(fstypes); i++, info++) {
 393                 if (fstype != FS_TYPE_ANY && info->fstype != FS_TYPE_ANY &&
 394                                 fstype != info->fstype)
 395                         continue;
 396
 397                 if (!fs_dev_desc && !info->null_dev_desc_ok)
 398                         continue;
 399
 400                 if (!info->probe(fs_dev_desc, &fs_partition)) {
 401                         fs_type = info->fstype;
 402                         fs_dev_part = part;
 403                         return 0;
 404                 }
 405         }
 406
 407         return -1;
 408 }
 409
 410 /* set current blk device w/ blk_desc + partition # */
 411 int fs_set_blk_dev_with_part(struct blk_desc *desc, int part)
 412 {
 413         struct fstype_info *info;
 414         int ret, i;
 415
 416         if (part >= 1)
 417                 ret = part_get_info(desc, part, &fs_partition);
 418         else
 419                 ret = part_get_info_whole_disk(desc, &fs_partition);
 420         if (ret)
 421                 return ret;
 422         fs_dev_desc = desc;
 423
 424         for (i = 0, info = fstypes; i < ARRAY_SIZE(fstypes); i++, info++) {
 425                 if (!info->probe(fs_dev_desc, &fs_partition)) {
 426                         fs_type = info->fstype;
 427                         fs_dev_part = part;
 428                         return 0;
 429                 }
 430         }
 431
 432         return -1;
 433 }
 434
 435 void fs_close(void)
 436 {
 437         struct fstype_info *info = fs_get_info(fs_type);
 438
 439         info->close();
 440
 441         fs_type = FS_TYPE_ANY;
 442 }
 443
 444 int fs_uuid(char *uuid_str)
 445 {
 446         struct fstype_info *info = fs_get_info(fs_type);
 447
 448         return info->uuid(uuid_str);
 449 }
 450
 451 int fs_ls(const char *dirname)
 452 {
 453         int ret;
 454
 455         struct fstype_info *info = fs_get_info(fs_type);
 456
 457         ret = info->ls(dirname);
 458
 459         fs_close();
 460
 461         return ret;
 462 }
 463
 464 int fs_exists(const char *filename)
 465 {
 466         int ret;
 467
 468         struct fstype_info *info = fs_get_info(fs_type);
 469
 470         ret = info->exists(filename);
 471
 472         fs_close();
 473
 474         return ret;
 475 }
 476
 477 int fs_size(const char *filename, loff_t *size)
 478 {
 479         int ret;
 480
 481         struct fstype_info *info = fs_get_info(fs_type);
 482
 483         ret = info->size(filename, size);
 484
 485         fs_close();
 486
 487         return ret;
 488 }
 489
 490 #ifdef CONFIG_LMB
 491 /* Check if a file may be read to the given address */
 492 static int fs_read_lmb_check(const char *filename, ulong addr, loff_t offset,
 493                              loff_t len, struct fstype_info *info)
 494 {
 495         struct lmb lmb;
 496         int ret;
 497         loff_t size;
 498         loff_t read_len;
 499
 500         /* get the actual size of the file */
 501         ret = info->size(filename, &size);
 502         if (ret)
 503                 return ret;
 504         if (offset >= size) {
 505                 /* offset >= EOF, no bytes will be written */
 506                 return 0;
 507         }
 508         read_len = size - offset;
 509
 510         /* limit to 'len' if it is smaller */
 511         if (len && len < read_len)
 512                 read_len = len;
 513
 514         lmb_init_and_reserve(&lmb, gd->bd, (void *)gd->fdt_blob);
 515         lmb_dump_all(&lmb);
 516
 517         if (lmb_alloc_addr(&lmb, addr, read_len) == addr)
 518                 return 0;
 519
 520         log_err("** Reading file would overwrite reserved memory **\n");
 521         return -ENOSPC;
 522 }
 523 #endif
 524
 525 static int _fs_read(const char *filename, ulong addr, loff_t offset, loff_t len,
 526                     int do_lmb_check, loff_t *actread)
 527 {
 528         struct fstype_info *info = fs_get_info(fs_type);
 529         void *buf;
 530         int ret;
 531
 532 #ifdef CONFIG_LMB
 533         if (do_lmb_check) {
 534                 ret = fs_read_lmb_check(filename, addr, offset, len, info);
 535                 if (ret)
 536                         return ret;
 537         }
 538 #endif
 539
 540         /*
 541          * We don't actually know how many bytes are being read, since len==0
 542          * means read the whole file.
 543          */
 544         buf = map_sysmem(addr, len);
 545         ret = info->read(filename, buf, offset, len, actread);
 546         unmap_sysmem(buf);
 547
 548         /* If we requested a specific number of bytes, check we got it */
 549         if (ret == 0 && len && *actread != len)
 550                 log_debug("** %s shorter than offset + len **\n", filename);
 551         fs_close();
 552
 553         return ret;
 554 }
 555
 556 int fs_read(const char *filename, ulong addr, loff_t offset, loff_t len,
 557             loff_t *actread)
 558 {
 559         return _fs_read(filename, addr, offset, len, 0, actread);
 560 }
 561
 562 int fs_write(const char *filename, ulong addr, loff_t offset, loff_t len,
 563              loff_t *actwrite)
 564 {
 565         struct fstype_info *info = fs_get_info(fs_type);
 566         void *buf;
 567         int ret;
 568
 569         buf = map_sysmem(addr, len);
 570         ret = info->write(filename, buf, offset, len, actwrite);
 571         unmap_sysmem(buf);
 572
 573         if (ret < 0 && len != *actwrite) {
 574                 log_err("** Unable to write file %s **\n", filename);
 575                 ret = -1;
 576         }
 577         fs_close();
 578
 579         return ret;
 580 }
 581
 582 struct fs_dir_stream *fs_opendir(const char *filename)
 583 {
 584         struct fstype_info *info = fs_get_info(fs_type);
 585         struct fs_dir_stream *dirs = NULL;
 586         int ret;
 587
 588         ret = info->opendir(filename, &dirs);
 589         fs_close();
 590         if (ret) {
 591                 errno = -ret;
 592                 return NULL;
 593         }
 594
 595         dirs->desc = fs_dev_desc;
 596         dirs->part = fs_dev_part;
 597
 598         return dirs;
 599 }
 600
 601 struct fs_dirent *fs_readdir(struct fs_dir_stream *dirs)
 602 {
 603         struct fstype_info *info;
 604         struct fs_dirent *dirent;
 605         int ret;
 606
 607         fs_set_blk_dev_with_part(dirs->desc, dirs->part);
 608         info = fs_get_info(fs_type);
 609
 610         ret = info->readdir(dirs, &dirent);
 611         fs_close();
 612         if (ret) {
 613                 errno = -ret;
 614                 return NULL;
 615         }
 616
 617         return dirent;
 618 }
 619
 620 void fs_closedir(struct fs_dir_stream *dirs)
 621 {
 622         struct fstype_info *info;
 623
 624         if (!dirs)
 625                 return;
 626
 627         fs_set_blk_dev_with_part(dirs->desc, dirs->part);
 628         info = fs_get_info(fs_type);
 629
 630         info->closedir(dirs);
 631         fs_close();
 632 }
 633
 634 int fs_unlink(const char *filename)
 635 {
 636         int ret;
 637
 638         struct fstype_info *info = fs_get_info(fs_type);
 639
 640         ret = info->unlink(filename);
 641
 642         fs_close();
 643
 644         return ret;
 645 }
 646
 647 int fs_mkdir(const char *dirname)
 648 {
 649         int ret;
 650
 651         struct fstype_info *info = fs_get_info(fs_type);
 652
 653         ret = info->mkdir(dirname);
 654
 655         fs_close();
 656
 657         return ret;
 658 }
 659
 660 int fs_ln(const char *fname, const char *target)
 661 {
 662         struct fstype_info *info = fs_get_info(fs_type);
 663         int ret;
 664
 665         ret = info->ln(fname, target);
 666
 667         if (ret < 0) {
 668                 log_err("** Unable to create link %s -> %s **\n", fname, target);
 669                 ret = -1;
 670         }
 671         fs_close();
 672
 673         return ret;
 674 }
 675
 676 int do_size(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[],
 677             int fstype)
 678 {
 679         loff_t size;
 680
 681         if (argc != 4)
 682                 return CMD_RET_USAGE;
 683
 684         if (fs_set_blk_dev(argv[1], argv[2], fstype))
 685                 return 1;
 686
 687         if (fs_size(argv[3], &size) < 0)
 688                 return CMD_RET_FAILURE;
 689
 690         env_set_hex("filesize", size);
 691
 692         return 0;
 693 }
 694
 695 int do_load(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[],
 696             int fstype)
 697 {
 698         unsigned long addr;
 699         const char *addr_str;
 700         const char *filename;
 701         loff_t bytes;
 702         loff_t pos;
 703         loff_t len_read;
 704         int ret;
 705         unsigned long time;
 706         char *ep;
 707
 708         if (argc < 2)
 709                 return CMD_RET_USAGE;
 710         if (argc > 7)
 711                 return CMD_RET_USAGE;
 712
 713         if (fs_set_blk_dev(argv[1], (argc >= 3) ? argv[2] : NULL, fstype))
 714                 return 1;
 715
 716         if (argc >= 4) {
 717                 addr = simple_strtoul(argv[3], &ep, 16);
 718                 if (ep == argv[3] || *ep != '\0')
 719                         return CMD_RET_USAGE;
 720         } else {
 721                 addr_str = env_get("loadaddr");
 722                 if (addr_str != NULL)
 723                         addr = simple_strtoul(addr_str, NULL, 16);
 724                 else
 725                         addr = CONFIG_SYS_LOAD_ADDR;
 726         }
 727         if (argc >= 5) {
 728                 filename = argv[4];
 729         } else {
 730                 filename = env_get("bootfile");
 731                 if (!filename) {
 732                         puts("** No boot file defined **\n");
 733                         return 1;
 734                 }
 735         }
 736         if (argc >= 6)
 737                 bytes = simple_strtoul(argv[5], NULL, 16);
 738         else
 739                 bytes = 0;
 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_read(filename, addr, pos, bytes, 1, &len_read);
 747         time = get_timer(time);
 748         if (ret < 0) {
 749                 log_err("Failed to load '%s'\n", filename);
 750                 return 1;
 751         }
 752
 753         if (IS_ENABLED(CONFIG_CMD_BOOTEFI))
 754                 efi_set_bootdev(argv[1], (argc > 2) ? argv[2] : "",
 755                                 (argc > 4) ? argv[4] : "");
 756
 757         printf("%llu bytes read in %lu ms", len_read, time);
 758         if (time > 0) {
 759                 puts(" (");
 760                 print_size(div_u64(len_read, time) * 1000, "/s");
 761                 puts(")");
 762         }
 763         puts("\n");
 764
 765         env_set_hex("fileaddr", addr);
 766         env_set_hex("filesize", len_read);
 767
 768         return 0;
 769 }
 770
 771 int do_ls(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[],
 772           int fstype)
 773 {
 774         if (argc < 2)
 775                 return CMD_RET_USAGE;
 776         if (argc > 4)
 777                 return CMD_RET_USAGE;
 778
 779         if (fs_set_blk_dev(argv[1], (argc >= 3) ? argv[2] : NULL, fstype))
 780                 return 1;
 781
 782         if (fs_ls(argc >= 4 ? argv[3] : "/"))
 783                 return 1;
 784
 785         return 0;
 786 }
 787
 788 int file_exists(const char *dev_type, const char *dev_part, const char *file,
 789                 int fstype)
 790 {
 791         if (fs_set_blk_dev(dev_type, dev_part, fstype))
 792                 return 0;
 793
 794         return fs_exists(file);
 795 }
 796
 797 int do_save(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[],
 798             int fstype)
 799 {
 800         unsigned long addr;
 801         const char *filename;
 802         loff_t bytes;
 803         loff_t pos;
 804         loff_t len;
 805         int ret;
 806         unsigned long time;
 807
 808         if (argc < 6 || argc > 7)
 809                 return CMD_RET_USAGE;
 810
 811         if (fs_set_blk_dev(argv[1], argv[2], fstype))
 812                 return 1;
 813
 814         addr = simple_strtoul(argv[3], NULL, 16);
 815         filename = argv[4];
 816         bytes = simple_strtoul(argv[5], NULL, 16);
 817         if (argc >= 7)
 818                 pos = simple_strtoul(argv[6], NULL, 16);
 819         else
 820                 pos = 0;
 821
 822         time = get_timer(0);
 823         ret = fs_write(filename, addr, pos, bytes, &len);
 824         time = get_timer(time);
 825         if (ret < 0)
 826                 return 1;
 827
 828         printf("%llu bytes written in %lu ms", len, time);
 829         if (time > 0) {
 830                 puts(" (");
 831                 print_size(div_u64(len, time) * 1000, "/s");
 832                 puts(")");
 833         }
 834         puts("\n");
 835
 836         return 0;
 837 }
 838
 839 int do_fs_uuid(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[],
 840                int fstype)
 841 {
 842         int ret;
 843         char uuid[37];
 844         memset(uuid, 0, sizeof(uuid));
 845
 846         if (argc < 3 || argc > 4)
 847                 return CMD_RET_USAGE;
 848
 849         if (fs_set_blk_dev(argv[1], argv[2], fstype))
 850                 return 1;
 851
 852         ret = fs_uuid(uuid);
 853         if (ret)
 854                 return CMD_RET_FAILURE;
 855
 856         if (argc == 4)
 857                 env_set(argv[3], uuid);
 858         else
 859                 printf("%s\n", uuid);
 860
 861         return CMD_RET_SUCCESS;
 862 }
 863
 864 int do_fs_type(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[])
 865 {
 866         struct fstype_info *info;
 867
 868         if (argc < 3 || argc > 4)
 869                 return CMD_RET_USAGE;
 870
 871         if (fs_set_blk_dev(argv[1], argv[2], FS_TYPE_ANY))
 872                 return 1;
 873
 874         info = fs_get_info(fs_type);
 875
 876         if (argc == 4)
 877                 env_set(argv[3], info->name);
 878         else
 879                 printf("%s\n", info->name);
 880
 881         fs_close();
 882
 883         return CMD_RET_SUCCESS;
 884 }
 885
 886 int do_rm(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[],
 887           int fstype)
 888 {
 889         if (argc != 4)
 890                 return CMD_RET_USAGE;
 891
 892         if (fs_set_blk_dev(argv[1], argv[2], fstype))
 893                 return 1;
 894
 895         if (fs_unlink(argv[3]))
 896                 return 1;
 897
 898         return 0;
 899 }
 900
 901 int do_mkdir(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[],
 902              int fstype)
 903 {
 904         int ret;
 905
 906         if (argc != 4)
 907                 return CMD_RET_USAGE;
 908
 909         if (fs_set_blk_dev(argv[1], argv[2], fstype))
 910                 return 1;
 911
 912         ret = fs_mkdir(argv[3]);
 913         if (ret) {
 914                 log_err("** Unable to create a directory \"%s\" **\n", argv[3]);
 915                 return 1;
 916         }
 917
 918         return 0;
 919 }
 920
 921 int do_ln(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[],
 922           int fstype)
 923 {
 924         if (argc != 5)
 925                 return CMD_RET_USAGE;
 926
 927         if (fs_set_blk_dev(argv[1], argv[2], fstype))
 928                 return 1;
 929
 930         if (fs_ln(argv[3], argv[4]))
 931                 return 1;
 932
 933         return 0;
 934 }
 935
 936 int do_fs_types(struct cmd_tbl *cmdtp, int flag, int argc, char * const argv[])
 937 {
 938         struct fstype_info *drv = fstypes;
 939         const int n_ents = ARRAY_SIZE(fstypes);
 940         struct fstype_info *entry;
 941         int i = 0;
 942
 943         puts("Supported filesystems");
 944         for (entry = drv; entry != drv + n_ents; entry++) {
 945                 if (entry->fstype != FS_TYPE_ANY) {
 946                         printf("%c %s", i ? ',' : ':', entry->name);
 947                         i++;
 948                 }
 949         }
 950         if (!i)
 951                 puts(": <none>");
 952         puts("\n");
 953         return CMD_RET_SUCCESS;
 954 }