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