fs/fs.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * Copyright (c) 2012, NVIDIA CORPORATION.  All rights reserved.
   4  */
   5
   6 #include <command.h>
   7 #include <config.h>
   8 #include <errno.h>
   9 #include <common.h>
  10 #include <env.h>
  11 #include <lmb.h>
  12 #include <log.h>
  13 #include <mapmem.h>
  14 #include <part.h>
  15 #include <ext4fs.h>
  16 #include <fat.h>
  17 #include <fs.h>
  18 #include <sandboxfs.h>
  19 #include <ubifs_uboot.h>
  20 #include <btrfs.h>
  21 #include <asm/io.h>
  22 #include <div64.h>
  23 #include <linux/math64.h>
  24 #include <efi_loader.h>
  25
  26 DECLARE_GLOBAL_DATA_PTR;
  27
  28 static struct blk_desc *fs_dev_desc;
  29 static int fs_dev_part;
  30 static struct disk_partition fs_partition;
  31 static int fs_type = FS_TYPE_ANY;
  32
  33 static inline int fs_probe_unsupported(struct blk_desc *fs_dev_desc,
  34                                       struct disk_partition *fs_partition)
  35 {
  36         printf("** Unrecognized filesystem type **\n");
  37         return -1;
  38 }
  39
  40 static inline int fs_ls_unsupported(const char *dirname)
  41 {
  42         return -1;
  43 }
  44
  45 /* generic implementation of ls in terms of opendir/readdir/closedir */
  46 __maybe_unused
  47 static int fs_ls_generic(const char *dirname)
  48 {
  49         struct fs_dir_stream *dirs;
  50         struct fs_dirent *dent;
  51         int nfiles = 0, ndirs = 0;
  52
  53         dirs = fs_opendir(dirname);
  54         if (!dirs)
  55                 return -errno;
  56
  57         while ((dent = fs_readdir(dirs))) {
  58                 if (dent->type == FS_DT_DIR) {
  59                         printf("            %s/\n", dent->name);
  60                         ndirs++;
  61                 } else {
  62                         printf(" %8lld   %s\n", dent->size, dent->name);
  63                         nfiles++;
  64                 }
  65         }
  66
  67         fs_closedir(dirs);
  68
  69         printf("\n%d file(s), %d dir(s)\n\n", nfiles, ndirs);
  70
  71         return 0;
  72 }
  73
  74 static inline int fs_exists_unsupported(const char *filename)
  75 {
  76         return 0;
  77 }
  78
  79 static inline int fs_size_unsupported(const char *filename, loff_t *size)
  80 {
  81         return -1;
  82 }
  83
  84 static inline int fs_read_unsupported(const char *filename, void *buf,
  85                                       loff_t offset, loff_t len,
  86                                       loff_t *actread)
  87 {
  88         return -1;
  89 }
  90
  91 static inline int fs_write_unsupported(const char *filename, void *buf,
  92                                       loff_t offset, loff_t len,
  93                                       loff_t *actwrite)
  94 {
  95         return -1;
  96 }
  97
  98 static inline int fs_ln_unsupported(const char *filename, const char *target)
  99 {
 100         return -1;
 101 }
 102
 103 static inline void fs_close_unsupported(void)
 104 {
 105 }
 106
 107 static inline int fs_uuid_unsupported(char *uuid_str)
 108 {
 109         return -1;
 110 }
 111
 112 static inline int fs_opendir_unsupported(const char *filename,
 113                                          struct fs_dir_stream **dirs)
 114 {
 115         return -EACCES;
 116 }
 117
 118 static inline int fs_unlink_unsupported(const char *filename)
 119 {
 120         return -1;
 121 }
 122
 123 static inline int fs_mkdir_unsupported(const char *dirname)
 124 {
 125         return -1;
 126 }
 127
 128 struct fstype_info {
 129         int fstype;
 130         char *name;
 131         /*
 132          * Is it legal to pass NULL as .probe()'s  fs_dev_desc parameter? This
 133          * should be false in most cases. For "virtual" filesystems which
 134          * aren't based on a U-Boot block device (e.g. sandbox), this can be
 135          * set to true. This should also be true for the dummy entry at the end
 136          * of fstypes[], since that is essentially a "virtual" (non-existent)
 137          * filesystem.
 138          */
 139         bool null_dev_desc_ok;
 140         int (*probe)(struct blk_desc *fs_dev_desc,
 141                      struct disk_partition *fs_partition);
 142         int (*ls)(const char *dirname);
 143         int (*exists)(const char *filename);
 144         int (*size)(const char *filename, loff_t *size);
 145         int (*read)(const char *filename, void *buf, loff_t offset,
 146                     loff_t len, loff_t *actread);
 147         int (*write)(const char *filename, void *buf, loff_t offset,
 148                      loff_t len, loff_t *actwrite);
 149         void (*close)(void);
 150         int (*uuid)(char *uuid_str);
 151         /*
 152          * Open a directory stream.  On success return 0 and directory
 153          * stream pointer via 'dirsp'.  On error, return -errno.  See
 154          * fs_opendir().
 155          */
 156         int (*opendir)(const char *filename, struct fs_dir_stream **dirsp);
 157         /*
 158          * Read next entry from directory stream.  On success return 0
 159          * and directory entry pointer via 'dentp'.  On error return
 160          * -errno.  See fs_readdir().
 161          */
 162         int (*readdir)(struct fs_dir_stream *dirs, struct fs_dirent **dentp);
 163         /* see fs_closedir() */
 164         void (*closedir)(struct fs_dir_stream *dirs);
 165         int (*unlink)(const char *filename);
 166         int (*mkdir)(const char *dirname);
 167         int (*ln)(const char *filename, const char *target);
 168 };
 169
 170 static struct fstype_info fstypes[] = {
 171 #ifdef CONFIG_FS_FAT
 172         {
 173                 .fstype = FS_TYPE_FAT,
 174                 .name = "fat",
 175                 .null_dev_desc_ok = false,
 176                 .probe = fat_set_blk_dev,
 177                 .close = fat_close,
 178                 .ls = fs_ls_generic,
 179                 .exists = fat_exists,
 180                 .size = fat_size,
 181                 .read = fat_read_file,
 182 #if CONFIG_IS_ENABLED(FAT_WRITE)
 183                 .write = file_fat_write,
 184                 .unlink = fat_unlink,
 185                 .mkdir = fat_mkdir,
 186 #else
 187                 .write = fs_write_unsupported,
 188                 .unlink = fs_unlink_unsupported,
 189                 .mkdir = fs_mkdir_unsupported,
 190 #endif
 191                 .uuid = fs_uuid_unsupported,
 192                 .opendir = fat_opendir,
 193                 .readdir = fat_readdir,
 194                 .closedir = fat_closedir,
 195                 .ln = fs_ln_unsupported,
 196         },
 197 #endif
 198
 199 #if CONFIG_IS_ENABLED(FS_EXT4)
 200         {
 201                 .fstype = FS_TYPE_EXT,
 202                 .name = "ext4",
 203                 .null_dev_desc_ok = false,
 204                 .probe = ext4fs_probe,
 205                 .close = ext4fs_close,
 206                 .ls = ext4fs_ls,
 207                 .exists = ext4fs_exists,
 208                 .size = ext4fs_size,
 209                 .read = ext4_read_file,
 210 #ifdef CONFIG_CMD_EXT4_WRITE
 211                 .write = ext4_write_file,
 212                 .ln = ext4fs_create_link,
 213 #else
 214                 .write = fs_write_unsupported,
 215                 .ln = fs_ln_unsupported,
 216 #endif
 217                 .uuid = ext4fs_uuid,
 218                 .opendir = fs_opendir_unsupported,
 219                 .unlink = fs_unlink_unsupported,
 220                 .mkdir = fs_mkdir_unsupported,
 221         },
 222 #endif
 223 #ifdef CONFIG_SANDBOX
 224         {
 225                 .fstype = FS_TYPE_SANDBOX,
 226                 .name = "sandbox",
 227                 .null_dev_desc_ok = true,
 228                 .probe = sandbox_fs_set_blk_dev,
 229                 .close = sandbox_fs_close,
 230                 .ls = sandbox_fs_ls,
 231                 .exists = sandbox_fs_exists,
 232                 .size = sandbox_fs_size,
 233                 .read = fs_read_sandbox,
 234                 .write = fs_write_sandbox,
 235                 .uuid = fs_uuid_unsupported,
 236                 .opendir = fs_opendir_unsupported,
 237                 .unlink = fs_unlink_unsupported,
 238                 .mkdir = fs_mkdir_unsupported,
 239                 .ln = fs_ln_unsupported,
 240         },
 241 #endif
 242 #ifdef CONFIG_CMD_UBIFS
 243         {
 244                 .fstype = FS_TYPE_UBIFS,
 245                 .name = "ubifs",
 246                 .null_dev_desc_ok = true,
 247                 .probe = ubifs_set_blk_dev,
 248                 .close = ubifs_close,
 249                 .ls = ubifs_ls,
 250                 .exists = ubifs_exists,
 251                 .size = ubifs_size,
 252                 .read = ubifs_read,
 253                 .write = fs_write_unsupported,
 254                 .uuid = fs_uuid_unsupported,
 255                 .opendir = fs_opendir_unsupported,
 256                 .unlink = fs_unlink_unsupported,
 257                 .mkdir = fs_mkdir_unsupported,
 258                 .ln = fs_ln_unsupported,
 259         },
 260 #endif
 261 #ifdef CONFIG_FS_BTRFS
 262         {
 263                 .fstype = FS_TYPE_BTRFS,
 264                 .name = "btrfs",
 265                 .null_dev_desc_ok = false,
 266                 .probe = btrfs_probe,
 267                 .close = btrfs_close,
 268                 .ls = btrfs_ls,
 269                 .exists = btrfs_exists,
 270                 .size = btrfs_size,
 271                 .read = btrfs_read,
 272                 .write = fs_write_unsupported,
 273                 .uuid = btrfs_uuid,
 274                 .opendir = fs_opendir_unsupported,
 275                 .unlink = fs_unlink_unsupported,
 276                 .mkdir = fs_mkdir_unsupported,
 277                 .ln = fs_ln_unsupported,
 278         },
 279 #endif
 280         {
 281                 .fstype = FS_TYPE_ANY,
 282                 .name = "unsupported",
 283                 .null_dev_desc_ok = true,
 284                 .probe = fs_probe_unsupported,
 285                 .close = fs_close_unsupported,
 286                 .ls = fs_ls_unsupported,
 287                 .exists = fs_exists_unsupported,
 288                 .size = fs_size_unsupported,
 289                 .read = fs_read_unsupported,
 290                 .write = fs_write_unsupported,
 291                 .uuid = fs_uuid_unsupported,
 292                 .opendir = fs_opendir_unsupported,
 293                 .unlink = fs_unlink_unsupported,
 294                 .mkdir = fs_mkdir_unsupported,
 295                 .ln = fs_ln_unsupported,
 296         },
 297 };
 298
 299 static struct fstype_info *fs_get_info(int fstype)
 300 {
 301         struct fstype_info *info;
 302         int i;
 303
 304         for (i = 0, info = fstypes; i < ARRAY_SIZE(fstypes) - 1; i++, info++) {
 305                 if (fstype == info->fstype)
 306                         return info;
 307         }
 308
 309         /* Return the 'unsupported' sentinel */
 310         return info;
 311 }
 312
 313 /**
 314  * fs_get_type() - Get type of current filesystem
 315  *
 316  * Return: filesystem type
 317  *
 318  * Returns filesystem type representing the current filesystem, or
 319  * FS_TYPE_ANY for any unrecognised filesystem.
 320  */
 321 int fs_get_type(void)
 322 {
 323         return fs_type;
 324 }
 325
 326 /**
 327  * fs_get_type_name() - Get type of current filesystem
 328  *
 329  * Return: Pointer to filesystem name
 330  *
 331  * Returns a string describing the current filesystem, or the sentinel
 332  * "unsupported" for any unrecognised filesystem.
 333  */
 334 const char *fs_get_type_name(void)
 335 {
 336         return fs_get_info(fs_type)->name;
 337 }
 338
 339 int fs_set_blk_dev(const char *ifname, const char *dev_part_str, int fstype)
 340 {
 341         struct fstype_info *info;
 342         int part, i;
 343 #ifdef CONFIG_NEEDS_MANUAL_RELOC
 344         static int relocated;
 345
 346         if (!relocated) {
 347                 for (i = 0, info = fstypes; i < ARRAY_SIZE(fstypes);
 348                                 i++, info++) {
 349                         info->name += gd->reloc_off;
 350                         info->probe += gd->reloc_off;
 351                         info->close += gd->reloc_off;
 352                         info->ls += gd->reloc_off;
 353                         info->read += gd->reloc_off;
 354                         info->write += gd->reloc_off;
 355                 }
 356                 relocated = 1;
 357         }
 358 #endif
 359
 360         part = blk_get_device_part_str(ifname, dev_part_str, &fs_dev_desc,
 361                                         &fs_partition, 1);
 362         if (part < 0)
 363                 return -1;
 364
 365         for (i = 0, info = fstypes; i < ARRAY_SIZE(fstypes); i++, info++) {
 366                 if (fstype != FS_TYPE_ANY && info->fstype != FS_TYPE_ANY &&
 367                                 fstype != info->fstype)
 368                         continue;
 369
 370                 if (!fs_dev_desc && !info->null_dev_desc_ok)
 371                         continue;
 372
 373                 if (!info->probe(fs_dev_desc, &fs_partition)) {
 374                         fs_type = info->fstype;
 375                         fs_dev_part = part;
 376                         return 0;
 377                 }
 378         }
 379
 380         return -1;
 381 }
 382
 383 /* set current blk device w/ blk_desc + partition # */
 384 int fs_set_blk_dev_with_part(struct blk_desc *desc, int part)
 385 {
 386         struct fstype_info *info;
 387         int ret, i;
 388
 389         if (part >= 1)
 390                 ret = part_get_info(desc, part, &fs_partition);
 391         else
 392                 ret = part_get_info_whole_disk(desc, &fs_partition);
 393         if (ret)
 394                 return ret;
 395         fs_dev_desc = desc;
 396
 397         for (i = 0, info = fstypes; i < ARRAY_SIZE(fstypes); i++, info++) {
 398                 if (!info->probe(fs_dev_desc, &fs_partition)) {
 399                         fs_type = info->fstype;
 400                         fs_dev_part = part;
 401                         return 0;
 402                 }
 403         }
 404
 405         return -1;
 406 }
 407
 408 void fs_close(void)
 409 {
 410         struct fstype_info *info = fs_get_info(fs_type);
 411
 412         info->close();
 413
 414         fs_type = FS_TYPE_ANY;
 415 }
 416
 417 int fs_uuid(char *uuid_str)
 418 {
 419         struct fstype_info *info = fs_get_info(fs_type);
 420
 421         return info->uuid(uuid_str);
 422 }
 423
 424 int fs_ls(const char *dirname)
 425 {
 426         int ret;
 427
 428         struct fstype_info *info = fs_get_info(fs_type);
 429
 430         ret = info->ls(dirname);
 431
 432         fs_close();
 433
 434         return ret;
 435 }
 436
 437 int fs_exists(const char *filename)
 438 {
 439         int ret;
 440
 441         struct fstype_info *info = fs_get_info(fs_type);
 442
 443         ret = info->exists(filename);
 444
 445         fs_close();
 446
 447         return ret;
 448 }
 449
 450 int fs_size(const char *filename, loff_t *size)
 451 {
 452         int ret;
 453
 454         struct fstype_info *info = fs_get_info(fs_type);
 455
 456         ret = info->size(filename, size);
 457
 458         fs_close();
 459
 460         return ret;
 461 }
 462
 463 #ifdef CONFIG_LMB
 464 /* Check if a file may be read to the given address */
 465 static int fs_read_lmb_check(const char *filename, ulong addr, loff_t offset,
 466                              loff_t len, struct fstype_info *info)
 467 {
 468         struct lmb lmb;
 469         int ret;
 470         loff_t size;
 471         loff_t read_len;
 472
 473         /* get the actual size of the file */
 474         ret = info->size(filename, &size);
 475         if (ret)
 476                 return ret;
 477         if (offset >= size) {
 478                 /* offset >= EOF, no bytes will be written */
 479                 return 0;
 480         }
 481         read_len = size - offset;
 482
 483         /* limit to 'len' if it is smaller */
 484         if (len && len < read_len)
 485                 read_len = len;
 486
 487         lmb_init_and_reserve(&lmb, gd->bd, (void *)gd->fdt_blob);
 488         lmb_dump_all(&lmb);
 489
 490         if (lmb_alloc_addr(&lmb, addr, read_len) == addr)
 491                 return 0;
 492
 493         printf("** Reading file would overwrite reserved memory **\n");
 494         return -ENOSPC;
 495 }
 496 #endif
 497
 498 static int _fs_read(const char *filename, ulong addr, loff_t offset, loff_t len,
 499                     int do_lmb_check, loff_t *actread)
 500 {
 501         struct fstype_info *info = fs_get_info(fs_type);
 502         void *buf;
 503         int ret;
 504
 505 #ifdef CONFIG_LMB
 506         if (do_lmb_check) {
 507                 ret = fs_read_lmb_check(filename, addr, offset, len, info);
 508                 if (ret)
 509                         return ret;
 510         }
 511 #endif
 512
 513         /*
 514          * We don't actually know how many bytes are being read, since len==0
 515          * means read the whole file.
 516          */
 517         buf = map_sysmem(addr, len);
 518         ret = info->read(filename, buf, offset, len, actread);
 519         unmap_sysmem(buf);
 520
 521         /* If we requested a specific number of bytes, check we got it */
 522         if (ret == 0 && len && *actread != len)
 523                 debug("** %s shorter than offset + len **\n", filename);
 524         fs_close();
 525
 526         return ret;
 527 }
 528
 529 int fs_read(const char *filename, ulong addr, loff_t offset, loff_t len,
 530             loff_t *actread)
 531 {
 532         return _fs_read(filename, addr, offset, len, 0, actread);
 533 }
 534
 535 int fs_write(const char *filename, ulong addr, loff_t offset, loff_t len,
 536              loff_t *actwrite)
 537 {
 538         struct fstype_info *info = fs_get_info(fs_type);
 539         void *buf;
 540         int ret;
 541
 542         buf = map_sysmem(addr, len);
 543         ret = info->write(filename, buf, offset, len, actwrite);
 544         unmap_sysmem(buf);
 545
 546         if (ret < 0 && len != *actwrite) {
 547                 printf("** Unable to write file %s **\n", filename);
 548                 ret = -1;
 549         }
 550         fs_close();
 551
 552         return ret;
 553 }
 554
 555 struct fs_dir_stream *fs_opendir(const char *filename)
 556 {
 557         struct fstype_info *info = fs_get_info(fs_type);
 558         struct fs_dir_stream *dirs = NULL;
 559         int ret;
 560
 561         ret = info->opendir(filename, &dirs);
 562         fs_close();
 563         if (ret) {
 564                 errno = -ret;
 565                 return NULL;
 566         }
 567
 568         dirs->desc = fs_dev_desc;
 569         dirs->part = fs_dev_part;
 570
 571         return dirs;
 572 }
 573
 574 struct fs_dirent *fs_readdir(struct fs_dir_stream *dirs)
 575 {
 576         struct fstype_info *info;
 577         struct fs_dirent *dirent;
 578         int ret;
 579
 580         fs_set_blk_dev_with_part(dirs->desc, dirs->part);
 581         info = fs_get_info(fs_type);
 582
 583         ret = info->readdir(dirs, &dirent);
 584         fs_close();
 585         if (ret) {
 586                 errno = -ret;
 587                 return NULL;
 588         }
 589
 590         return dirent;
 591 }
 592
 593 void fs_closedir(struct fs_dir_stream *dirs)
 594 {
 595         struct fstype_info *info;
 596
 597         if (!dirs)
 598                 return;
 599
 600         fs_set_blk_dev_with_part(dirs->desc, dirs->part);
 601         info = fs_get_info(fs_type);
 602
 603         info->closedir(dirs);
 604         fs_close();
 605 }
 606
 607 int fs_unlink(const char *filename)
 608 {
 609         int ret;
 610
 611         struct fstype_info *info = fs_get_info(fs_type);
 612
 613         ret = info->unlink(filename);
 614
 615         fs_close();
 616
 617         return ret;
 618 }
 619
 620 int fs_mkdir(const char *dirname)
 621 {
 622         int ret;
 623
 624         struct fstype_info *info = fs_get_info(fs_type);
 625
 626         ret = info->mkdir(dirname);
 627
 628         fs_close();
 629
 630         return ret;
 631 }
 632
 633 int fs_ln(const char *fname, const char *target)
 634 {
 635         struct fstype_info *info = fs_get_info(fs_type);
 636         int ret;
 637
 638         ret = info->ln(fname, target);
 639
 640         if (ret < 0) {
 641                 printf("** Unable to create link %s -> %s **\n", fname, target);
 642                 ret = -1;
 643         }
 644         fs_close();
 645
 646         return ret;
 647 }
 648
 649 int do_size(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[],
 650             int fstype)
 651 {
 652         loff_t size;
 653
 654         if (argc != 4)
 655                 return CMD_RET_USAGE;
 656
 657         if (fs_set_blk_dev(argv[1], argv[2], fstype))
 658                 return 1;
 659
 660         if (fs_size(argv[3], &size) < 0)
 661                 return CMD_RET_FAILURE;
 662
 663         env_set_hex("filesize", size);
 664
 665         return 0;
 666 }
 667
 668 int do_load(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[],
 669             int fstype)
 670 {
 671         unsigned long addr;
 672         const char *addr_str;
 673         const char *filename;
 674         loff_t bytes;
 675         loff_t pos;
 676         loff_t len_read;
 677         int ret;
 678         unsigned long time;
 679         char *ep;
 680
 681         if (argc < 2)
 682                 return CMD_RET_USAGE;
 683         if (argc > 7)
 684                 return CMD_RET_USAGE;
 685
 686         if (fs_set_blk_dev(argv[1], (argc >= 3) ? argv[2] : NULL, fstype))
 687                 return 1;
 688
 689         if (argc >= 4) {
 690                 addr = simple_strtoul(argv[3], &ep, 16);
 691                 if (ep == argv[3] || *ep != '\0')
 692                         return CMD_RET_USAGE;
 693         } else {
 694                 addr_str = env_get("loadaddr");
 695                 if (addr_str != NULL)
 696                         addr = simple_strtoul(addr_str, NULL, 16);
 697                 else
 698                         addr = CONFIG_SYS_LOAD_ADDR;
 699         }
 700         if (argc >= 5) {
 701                 filename = argv[4];
 702         } else {
 703                 filename = env_get("bootfile");
 704                 if (!filename) {
 705                         puts("** No boot file defined **\n");
 706                         return 1;
 707                 }
 708         }
 709         if (argc >= 6)
 710                 bytes = simple_strtoul(argv[5], NULL, 16);
 711         else
 712                 bytes = 0;
 713         if (argc >= 7)
 714                 pos = simple_strtoul(argv[6], NULL, 16);
 715         else
 716                 pos = 0;
 717
 718 #ifdef CONFIG_CMD_BOOTEFI
 719         efi_set_bootdev(argv[1], (argc > 2) ? argv[2] : "",
 720                         (argc > 4) ? argv[4] : "");
 721 #endif
 722         time = get_timer(0);
 723         ret = _fs_read(filename, addr, pos, bytes, 1, &len_read);
 724         time = get_timer(time);
 725         if (ret < 0)
 726                 return 1;
 727
 728         printf("%llu bytes read in %lu ms", len_read, time);
 729         if (time > 0) {
 730                 puts(" (");
 731                 print_size(div_u64(len_read, time) * 1000, "/s");
 732                 puts(")");
 733         }
 734         puts("\n");
 735
 736         env_set_hex("fileaddr", addr);
 737         env_set_hex("filesize", len_read);
 738
 739         return 0;
 740 }
 741
 742 int do_ls(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[],
 743           int fstype)
 744 {
 745         if (argc < 2)
 746                 return CMD_RET_USAGE;
 747         if (argc > 4)
 748                 return CMD_RET_USAGE;
 749
 750         if (fs_set_blk_dev(argv[1], (argc >= 3) ? argv[2] : NULL, fstype))
 751                 return 1;
 752
 753         if (fs_ls(argc >= 4 ? argv[3] : "/"))
 754                 return 1;
 755
 756         return 0;
 757 }
 758
 759 int file_exists(const char *dev_type, const char *dev_part, const char *file,
 760                 int fstype)
 761 {
 762         if (fs_set_blk_dev(dev_type, dev_part, fstype))
 763                 return 0;
 764
 765         return fs_exists(file);
 766 }
 767
 768 int do_save(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[],
 769             int fstype)
 770 {
 771         unsigned long addr;
 772         const char *filename;
 773         loff_t bytes;
 774         loff_t pos;
 775         loff_t len;
 776         int ret;
 777         unsigned long time;
 778
 779         if (argc < 6 || argc > 7)
 780                 return CMD_RET_USAGE;
 781
 782         if (fs_set_blk_dev(argv[1], argv[2], fstype))
 783                 return 1;
 784
 785         addr = simple_strtoul(argv[3], NULL, 16);
 786         filename = argv[4];
 787         bytes = simple_strtoul(argv[5], NULL, 16);
 788         if (argc >= 7)
 789                 pos = simple_strtoul(argv[6], NULL, 16);
 790         else
 791                 pos = 0;
 792
 793         time = get_timer(0);
 794         ret = fs_write(filename, addr, pos, bytes, &len);
 795         time = get_timer(time);
 796         if (ret < 0)
 797                 return 1;
 798
 799         printf("%llu bytes written in %lu ms", len, time);
 800         if (time > 0) {
 801                 puts(" (");
 802                 print_size(div_u64(len, time) * 1000, "/s");
 803                 puts(")");
 804         }
 805         puts("\n");
 806
 807         return 0;
 808 }
 809
 810 int do_fs_uuid(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[],
 811                int fstype)
 812 {
 813         int ret;
 814         char uuid[37];
 815         memset(uuid, 0, sizeof(uuid));
 816
 817         if (argc < 3 || argc > 4)
 818                 return CMD_RET_USAGE;
 819
 820         if (fs_set_blk_dev(argv[1], argv[2], fstype))
 821                 return 1;
 822
 823         ret = fs_uuid(uuid);
 824         if (ret)
 825                 return CMD_RET_FAILURE;
 826
 827         if (argc == 4)
 828                 env_set(argv[3], uuid);
 829         else
 830                 printf("%s\n", uuid);
 831
 832         return CMD_RET_SUCCESS;
 833 }
 834
 835 int do_fs_type(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[])
 836 {
 837         struct fstype_info *info;
 838
 839         if (argc < 3 || argc > 4)
 840                 return CMD_RET_USAGE;
 841
 842         if (fs_set_blk_dev(argv[1], argv[2], FS_TYPE_ANY))
 843                 return 1;
 844
 845         info = fs_get_info(fs_type);
 846
 847         if (argc == 4)
 848                 env_set(argv[3], info->name);
 849         else
 850                 printf("%s\n", info->name);
 851
 852         fs_close();
 853
 854         return CMD_RET_SUCCESS;
 855 }
 856
 857 int do_rm(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[],
 858           int fstype)
 859 {
 860         if (argc != 4)
 861                 return CMD_RET_USAGE;
 862
 863         if (fs_set_blk_dev(argv[1], argv[2], fstype))
 864                 return 1;
 865
 866         if (fs_unlink(argv[3]))
 867                 return 1;
 868
 869         return 0;
 870 }
 871
 872 int do_mkdir(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[],
 873              int fstype)
 874 {
 875         int ret;
 876
 877         if (argc != 4)
 878                 return CMD_RET_USAGE;
 879
 880         if (fs_set_blk_dev(argv[1], argv[2], fstype))
 881                 return 1;
 882
 883         ret = fs_mkdir(argv[3]);
 884         if (ret) {
 885                 printf("** Unable to create a directory \"%s\" **\n", argv[3]);
 886                 return 1;
 887         }
 888
 889         return 0;
 890 }
 891
 892 int do_ln(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[],
 893           int fstype)
 894 {
 895         if (argc != 5)
 896                 return CMD_RET_USAGE;
 897
 898         if (fs_set_blk_dev(argv[1], argv[2], fstype))
 899                 return 1;
 900
 901         if (fs_ln(argv[3], argv[4]))
 902                 return 1;
 903
 904         return 0;
 905 }