fs/fs.c

   1 /*
   2  * Copyright (c) 2012, NVIDIA CORPORATION.  All rights reserved.
   3  *
   4  * This program is free software; you can redistribute it and/or modify it
   5  * under the terms and conditions of the GNU General Public License,
   6  * version 2, as published by the Free Software Foundation.
   7  *
   8  * This program is distributed in the hope it will be useful, but WITHOUT
   9  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  10  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  11  * more details.
  12  *
  13  * You should have received a copy of the GNU General Public License
  14  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  15  */
  16
  17 #include <config.h>
  18 #include <errno.h>
  19 #include <common.h>
  20 #include <mapmem.h>
  21 #include <part.h>
  22 #include <ext4fs.h>
  23 #include <fat.h>
  24 #include <fs.h>
  25 #include <sandboxfs.h>
  26 #include <asm/io.h>
  27 #include <div64.h>
  28 #include <linux/math64.h>
  29
  30 DECLARE_GLOBAL_DATA_PTR;
  31
  32 static block_dev_desc_t *fs_dev_desc;
  33 static disk_partition_t fs_partition;
  34 static int fs_type = FS_TYPE_ANY;
  35
  36 static inline int fs_probe_unsupported(block_dev_desc_t *fs_dev_desc,
  37                                       disk_partition_t *fs_partition)
  38 {
  39         printf("** 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 static inline int fs_exists_unsupported(const char *filename)
  49 {
  50         return 0;
  51 }
  52
  53 static inline int fs_size_unsupported(const char *filename, loff_t *size)
  54 {
  55         return -1;
  56 }
  57
  58 static inline int fs_read_unsupported(const char *filename, void *buf,
  59                                       loff_t offset, loff_t len,
  60                                       loff_t *actread)
  61 {
  62         return -1;
  63 }
  64
  65 static inline int fs_write_unsupported(const char *filename, void *buf,
  66                                       loff_t offset, loff_t len,
  67                                       loff_t *actwrite)
  68 {
  69         return -1;
  70 }
  71
  72 static inline void fs_close_unsupported(void)
  73 {
  74 }
  75
  76 static inline int fs_uuid_unsupported(char *uuid_str)
  77 {
  78         return -1;
  79 }
  80
  81 struct fstype_info {
  82         int fstype;
  83         char *name;
  84         /*
  85          * Is it legal to pass NULL as .probe()'s  fs_dev_desc parameter? This
  86          * should be false in most cases. For "virtual" filesystems which
  87          * aren't based on a U-Boot block device (e.g. sandbox), this can be
  88          * set to true. This should also be true for the dumm entry at the end
  89          * of fstypes[], since that is essentially a "virtual" (non-existent)
  90          * filesystem.
  91          */
  92         bool null_dev_desc_ok;
  93         int (*probe)(block_dev_desc_t *fs_dev_desc,
  94                      disk_partition_t *fs_partition);
  95         int (*ls)(const char *dirname);
  96         int (*exists)(const char *filename);
  97         int (*size)(const char *filename, loff_t *size);
  98         int (*read)(const char *filename, void *buf, loff_t offset,
  99                     loff_t len, loff_t *actread);
 100         int (*write)(const char *filename, void *buf, loff_t offset,
 101                      loff_t len, loff_t *actwrite);
 102         void (*close)(void);
 103         int (*uuid)(char *uuid_str);
 104 };
 105
 106 static struct fstype_info fstypes[] = {
 107 #ifdef CONFIG_FS_FAT
 108         {
 109                 .fstype = FS_TYPE_FAT,
 110                 .name = "fat",
 111                 .null_dev_desc_ok = false,
 112                 .probe = fat_set_blk_dev,
 113                 .close = fat_close,
 114                 .ls = file_fat_ls,
 115                 .exists = fat_exists,
 116                 .size = fat_size,
 117                 .read = fat_read_file,
 118 #ifdef CONFIG_FAT_WRITE
 119                 .write = file_fat_write,
 120 #else
 121                 .write = fs_write_unsupported,
 122 #endif
 123                 .uuid = fs_uuid_unsupported,
 124         },
 125 #endif
 126 #ifdef CONFIG_FS_EXT4
 127         {
 128                 .fstype = FS_TYPE_EXT,
 129                 .name = "ext4",
 130                 .null_dev_desc_ok = false,
 131                 .probe = ext4fs_probe,
 132                 .close = ext4fs_close,
 133                 .ls = ext4fs_ls,
 134                 .exists = ext4fs_exists,
 135                 .size = ext4fs_size,
 136                 .read = ext4_read_file,
 137 #ifdef CONFIG_CMD_EXT4_WRITE
 138                 .write = ext4_write_file,
 139 #else
 140                 .write = fs_write_unsupported,
 141 #endif
 142                 .uuid = ext4fs_uuid,
 143         },
 144 #endif
 145 #ifdef CONFIG_SANDBOX
 146         {
 147                 .fstype = FS_TYPE_SANDBOX,
 148                 .name = "sandbox",
 149                 .null_dev_desc_ok = true,
 150                 .probe = sandbox_fs_set_blk_dev,
 151                 .close = sandbox_fs_close,
 152                 .ls = sandbox_fs_ls,
 153                 .exists = sandbox_fs_exists,
 154                 .size = sandbox_fs_size,
 155                 .read = fs_read_sandbox,
 156                 .write = fs_write_sandbox,
 157                 .uuid = fs_uuid_unsupported,
 158         },
 159 #endif
 160         {
 161                 .fstype = FS_TYPE_ANY,
 162                 .name = "unsupported",
 163                 .null_dev_desc_ok = true,
 164                 .probe = fs_probe_unsupported,
 165                 .close = fs_close_unsupported,
 166                 .ls = fs_ls_unsupported,
 167                 .exists = fs_exists_unsupported,
 168                 .size = fs_size_unsupported,
 169                 .read = fs_read_unsupported,
 170                 .write = fs_write_unsupported,
 171                 .uuid = fs_uuid_unsupported,
 172         },
 173 };
 174
 175 static struct fstype_info *fs_get_info(int fstype)
 176 {
 177         struct fstype_info *info;
 178         int i;
 179
 180         for (i = 0, info = fstypes; i < ARRAY_SIZE(fstypes) - 1; i++, info++) {
 181                 if (fstype == info->fstype)
 182                         return info;
 183         }
 184
 185         /* Return the 'unsupported' sentinel */
 186         return info;
 187 }
 188
 189 int fs_set_blk_dev(const char *ifname, const char *dev_part_str, int fstype)
 190 {
 191         struct fstype_info *info;
 192         int part, i;
 193 #ifdef CONFIG_NEEDS_MANUAL_RELOC
 194         static int relocated;
 195
 196         if (!relocated) {
 197                 for (i = 0, info = fstypes; i < ARRAY_SIZE(fstypes);
 198                                 i++, info++) {
 199                         info->name += gd->reloc_off;
 200                         info->probe += gd->reloc_off;
 201                         info->close += gd->reloc_off;
 202                         info->ls += gd->reloc_off;
 203                         info->read += gd->reloc_off;
 204                         info->write += gd->reloc_off;
 205                 }
 206                 relocated = 1;
 207         }
 208 #endif
 209
 210         part = get_device_and_partition(ifname, dev_part_str, &fs_dev_desc,
 211                                         &fs_partition, 1);
 212         if (part < 0)
 213                 return -1;
 214
 215         for (i = 0, info = fstypes; i < ARRAY_SIZE(fstypes); i++, info++) {
 216                 if (fstype != FS_TYPE_ANY && info->fstype != FS_TYPE_ANY &&
 217                                 fstype != info->fstype)
 218                         continue;
 219
 220                 if (!fs_dev_desc && !info->null_dev_desc_ok)
 221                         continue;
 222
 223                 if (!info->probe(fs_dev_desc, &fs_partition)) {
 224                         fs_type = info->fstype;
 225                         return 0;
 226                 }
 227         }
 228
 229         return -1;
 230 }
 231
 232 static void fs_close(void)
 233 {
 234         struct fstype_info *info = fs_get_info(fs_type);
 235
 236         info->close();
 237
 238         fs_type = FS_TYPE_ANY;
 239 }
 240
 241 int fs_uuid(char *uuid_str)
 242 {
 243         struct fstype_info *info = fs_get_info(fs_type);
 244
 245         return info->uuid(uuid_str);
 246 }
 247
 248 int fs_ls(const char *dirname)
 249 {
 250         int ret;
 251
 252         struct fstype_info *info = fs_get_info(fs_type);
 253
 254         ret = info->ls(dirname);
 255
 256         fs_type = FS_TYPE_ANY;
 257         fs_close();
 258
 259         return ret;
 260 }
 261
 262 int fs_exists(const char *filename)
 263 {
 264         int ret;
 265
 266         struct fstype_info *info = fs_get_info(fs_type);
 267
 268         ret = info->exists(filename);
 269
 270         fs_close();
 271
 272         return ret;
 273 }
 274
 275 int fs_size(const char *filename, loff_t *size)
 276 {
 277         int ret;
 278
 279         struct fstype_info *info = fs_get_info(fs_type);
 280
 281         ret = info->size(filename, size);
 282
 283         fs_close();
 284
 285         return ret;
 286 }
 287
 288 int fs_read(const char *filename, ulong addr, loff_t offset, loff_t len,
 289             loff_t *actread)
 290 {
 291         struct fstype_info *info = fs_get_info(fs_type);
 292         void *buf;
 293         int ret;
 294
 295         /*
 296          * We don't actually know how many bytes are being read, since len==0
 297          * means read the whole file.
 298          */
 299         buf = map_sysmem(addr, len);
 300         ret = info->read(filename, buf, offset, len, actread);
 301         unmap_sysmem(buf);
 302
 303         /* If we requested a specific number of bytes, check we got it */
 304         if (ret == 0 && len && *actread != len)
 305                 printf("** %s shorter than offset + len **\n", filename);
 306         fs_close();
 307
 308         return ret;
 309 }
 310
 311 int fs_write(const char *filename, ulong addr, loff_t offset, loff_t len,
 312              loff_t *actwrite)
 313 {
 314         struct fstype_info *info = fs_get_info(fs_type);
 315         void *buf;
 316         int ret;
 317
 318         buf = map_sysmem(addr, len);
 319         ret = info->write(filename, buf, offset, len, actwrite);
 320         unmap_sysmem(buf);
 321
 322         if (ret < 0 && len != *actwrite) {
 323                 printf("** Unable to write file %s **\n", filename);
 324                 ret = -1;
 325         }
 326         fs_close();
 327
 328         return ret;
 329 }
 330
 331 int do_size(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[],
 332                 int fstype)
 333 {
 334         loff_t size;
 335
 336         if (argc != 4)
 337                 return CMD_RET_USAGE;
 338
 339         if (fs_set_blk_dev(argv[1], argv[2], fstype))
 340                 return 1;
 341
 342         if (fs_size(argv[3], &size) < 0)
 343                 return CMD_RET_FAILURE;
 344
 345         setenv_hex("filesize", size);
 346
 347         return 0;
 348 }
 349
 350 int do_load(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[],
 351                 int fstype)
 352 {
 353         unsigned long addr;
 354         const char *addr_str;
 355         const char *filename;
 356         loff_t bytes;
 357         loff_t pos;
 358         loff_t len_read;
 359         int ret;
 360         unsigned long time;
 361         char *ep;
 362
 363         if (argc < 2)
 364                 return CMD_RET_USAGE;
 365         if (argc > 7)
 366                 return CMD_RET_USAGE;
 367
 368         if (fs_set_blk_dev(argv[1], (argc >= 3) ? argv[2] : NULL, fstype))
 369                 return 1;
 370
 371         if (argc >= 4) {
 372                 addr = simple_strtoul(argv[3], &ep, 16);
 373                 if (ep == argv[3] || *ep != '\0')
 374                         return CMD_RET_USAGE;
 375         } else {
 376                 addr_str = getenv("loadaddr");
 377                 if (addr_str != NULL)
 378                         addr = simple_strtoul(addr_str, NULL, 16);
 379                 else
 380                         addr = CONFIG_SYS_LOAD_ADDR;
 381         }
 382         if (argc >= 5) {
 383                 filename = argv[4];
 384         } else {
 385                 filename = getenv("bootfile");
 386                 if (!filename) {
 387                         puts("** No boot file defined **\n");
 388                         return 1;
 389                 }
 390         }
 391         if (argc >= 6)
 392                 bytes = simple_strtoul(argv[5], NULL, 16);
 393         else
 394                 bytes = 0;
 395         if (argc >= 7)
 396                 pos = simple_strtoul(argv[6], NULL, 16);
 397         else
 398                 pos = 0;
 399
 400         time = get_timer(0);
 401         ret = fs_read(filename, addr, pos, bytes, &len_read);
 402         time = get_timer(time);
 403         if (ret < 0)
 404                 return 1;
 405
 406         printf("%llu bytes read in %lu ms", len_read, time);
 407         if (time > 0) {
 408                 puts(" (");
 409                 print_size(div_u64(len_read, time) * 1000, "/s");
 410                 puts(")");
 411         }
 412         puts("\n");
 413
 414         setenv_hex("filesize", len_read);
 415
 416         return 0;
 417 }
 418
 419 int do_ls(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[],
 420         int fstype)
 421 {
 422         if (argc < 2)
 423                 return CMD_RET_USAGE;
 424         if (argc > 4)
 425                 return CMD_RET_USAGE;
 426
 427         if (fs_set_blk_dev(argv[1], (argc >= 3) ? argv[2] : NULL, fstype))
 428                 return 1;
 429
 430         if (fs_ls(argc >= 4 ? argv[3] : "/"))
 431                 return 1;
 432
 433         return 0;
 434 }
 435
 436 int file_exists(const char *dev_type, const char *dev_part, const char *file,
 437                 int fstype)
 438 {
 439         if (fs_set_blk_dev(dev_type, dev_part, fstype))
 440                 return 0;
 441
 442         return fs_exists(file);
 443 }
 444
 445 int do_save(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[],
 446                 int fstype)
 447 {
 448         unsigned long addr;
 449         const char *filename;
 450         loff_t bytes;
 451         loff_t pos;
 452         loff_t len;
 453         int ret;
 454         unsigned long time;
 455
 456         if (argc < 6 || argc > 7)
 457                 return CMD_RET_USAGE;
 458
 459         if (fs_set_blk_dev(argv[1], argv[2], fstype))
 460                 return 1;
 461
 462         addr = simple_strtoul(argv[3], NULL, 16);
 463         filename = argv[4];
 464         bytes = simple_strtoul(argv[5], NULL, 16);
 465         if (argc >= 7)
 466                 pos = simple_strtoul(argv[6], NULL, 16);
 467         else
 468                 pos = 0;
 469
 470         time = get_timer(0);
 471         ret = fs_write(filename, addr, pos, bytes, &len);
 472         time = get_timer(time);
 473         if (ret < 0)
 474                 return 1;
 475
 476         printf("%llu bytes written in %lu ms", len, time);
 477         if (time > 0) {
 478                 puts(" (");
 479                 print_size(div_u64(len, time) * 1000, "/s");
 480                 puts(")");
 481         }
 482         puts("\n");
 483
 484         return 0;
 485 }
 486
 487 int do_fs_uuid(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[],
 488                 int fstype)
 489 {
 490         int ret;
 491         char uuid[37];
 492         memset(uuid, 0, sizeof(uuid));
 493
 494         if (argc < 3 || argc > 4)
 495                 return CMD_RET_USAGE;
 496
 497         if (fs_set_blk_dev(argv[1], argv[2], fstype))
 498                 return 1;
 499
 500         ret = fs_uuid(uuid);
 501         if (ret)
 502                 return CMD_RET_FAILURE;
 503
 504         if (argc == 4)
 505                 setenv(argv[3], uuid);
 506         else
 507                 printf("%s\n", uuid);
 508
 509         return CMD_RET_SUCCESS;
 510 }
 511
 512 int do_fs_type(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
 513 {
 514         struct fstype_info *info;
 515
 516         if (argc < 3 || argc > 4)
 517                 return CMD_RET_USAGE;
 518
 519         if (fs_set_blk_dev(argv[1], argv[2], FS_TYPE_ANY))
 520                 return 1;
 521
 522         info = fs_get_info(fs_type);
 523
 524         if (argc == 4)
 525                 setenv(argv[3], info->name);
 526         else
 527                 printf("%s\n", info->name);
 528
 529         return CMD_RET_SUCCESS;
 530 }
 531