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 <common.h>
  19 #include <part.h>
  20 #include <ext4fs.h>
  21 #include <fat.h>
  22 #include <fs.h>
  23 #include <sandboxfs.h>
  24 #include <asm/io.h>
  25
  26 DECLARE_GLOBAL_DATA_PTR;
  27
  28 static block_dev_desc_t *fs_dev_desc;
  29 static disk_partition_t fs_partition;
  30 static int fs_type = FS_TYPE_ANY;
  31
  32 static inline int fs_probe_unsupported(block_dev_desc_t *fs_dev_desc,
  33                                       disk_partition_t *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 static inline int fs_exists_unsupported(const char *filename)
  45 {
  46         return 0;
  47 }
  48
  49 static inline int fs_read_unsupported(const char *filename, void *buf,
  50                                       int offset, int len)
  51 {
  52         return -1;
  53 }
  54
  55 static inline int fs_write_unsupported(const char *filename, void *buf,
  56                                       int offset, int len)
  57 {
  58         return -1;
  59 }
  60
  61 static inline void fs_close_unsupported(void)
  62 {
  63 }
  64
  65 struct fstype_info {
  66         int fstype;
  67         int (*probe)(block_dev_desc_t *fs_dev_desc,
  68                      disk_partition_t *fs_partition);
  69         int (*ls)(const char *dirname);
  70         int (*exists)(const char *filename);
  71         int (*read)(const char *filename, void *buf, int offset, int len);
  72         int (*write)(const char *filename, void *buf, int offset, int len);
  73         void (*close)(void);
  74 };
  75
  76 static struct fstype_info fstypes[] = {
  77 #ifdef CONFIG_FS_FAT
  78         {
  79                 .fstype = FS_TYPE_FAT,
  80                 .probe = fat_set_blk_dev,
  81                 .close = fat_close,
  82                 .ls = file_fat_ls,
  83                 .exists = fs_exists_unsupported,
  84                 .read = fat_read_file,
  85                 .write = fs_write_unsupported,
  86         },
  87 #endif
  88 #ifdef CONFIG_FS_EXT4
  89         {
  90                 .fstype = FS_TYPE_EXT,
  91                 .probe = ext4fs_probe,
  92                 .close = ext4fs_close,
  93                 .ls = ext4fs_ls,
  94                 .exists = fs_exists_unsupported,
  95                 .read = ext4_read_file,
  96                 .write = fs_write_unsupported,
  97         },
  98 #endif
  99 #ifdef CONFIG_SANDBOX
 100         {
 101                 .fstype = FS_TYPE_SANDBOX,
 102                 .probe = sandbox_fs_set_blk_dev,
 103                 .close = sandbox_fs_close,
 104                 .ls = sandbox_fs_ls,
 105                 .exists = fs_exists_unsupported,
 106                 .read = fs_read_sandbox,
 107                 .write = fs_write_sandbox,
 108         },
 109 #endif
 110         {
 111                 .fstype = FS_TYPE_ANY,
 112                 .probe = fs_probe_unsupported,
 113                 .close = fs_close_unsupported,
 114                 .ls = fs_ls_unsupported,
 115                 .exists = fs_exists_unsupported,
 116                 .read = fs_read_unsupported,
 117                 .write = fs_write_unsupported,
 118         },
 119 };
 120
 121 static struct fstype_info *fs_get_info(int fstype)
 122 {
 123         struct fstype_info *info;
 124         int i;
 125
 126         for (i = 0, info = fstypes; i < ARRAY_SIZE(fstypes) - 1; i++, info++) {
 127                 if (fstype == info->fstype)
 128                         return info;
 129         }
 130
 131         /* Return the 'unsupported' sentinel */
 132         return info;
 133 }
 134
 135 int fs_set_blk_dev(const char *ifname, const char *dev_part_str, int fstype)
 136 {
 137         struct fstype_info *info;
 138         int part, i;
 139 #ifdef CONFIG_NEEDS_MANUAL_RELOC
 140         static int relocated;
 141
 142         if (!relocated) {
 143                 for (i = 0, info = fstypes; i < ARRAY_SIZE(fstypes);
 144                                 i++, info++) {
 145                         info->probe += gd->reloc_off;
 146                         info->close += gd->reloc_off;
 147                         info->ls += gd->reloc_off;
 148                         info->read += gd->reloc_off;
 149                         info->write += gd->reloc_off;
 150                 }
 151                 relocated = 1;
 152         }
 153 #endif
 154
 155         part = get_device_and_partition(ifname, dev_part_str, &fs_dev_desc,
 156                                         &fs_partition, 1);
 157         if (part < 0)
 158                 return -1;
 159
 160         for (i = 0, info = fstypes; i < ARRAY_SIZE(fstypes); i++, info++) {
 161                 if (fstype != FS_TYPE_ANY && info->fstype != FS_TYPE_ANY &&
 162                                 fstype != info->fstype)
 163                         continue;
 164
 165                 if (!info->probe(fs_dev_desc, &fs_partition)) {
 166                         fs_type = info->fstype;
 167                         return 0;
 168                 }
 169         }
 170
 171         return -1;
 172 }
 173
 174 static void fs_close(void)
 175 {
 176         struct fstype_info *info = fs_get_info(fs_type);
 177
 178         info->close();
 179
 180         fs_type = FS_TYPE_ANY;
 181 }
 182
 183 int fs_ls(const char *dirname)
 184 {
 185         int ret;
 186
 187         struct fstype_info *info = fs_get_info(fs_type);
 188
 189         ret = info->ls(dirname);
 190
 191         fs_type = FS_TYPE_ANY;
 192         fs_close();
 193
 194         return ret;
 195 }
 196
 197 int fs_exists(const char *filename)
 198 {
 199         int ret;
 200
 201         struct fstype_info *info = fs_get_info(fs_type);
 202
 203         ret = info->exists(filename);
 204
 205         fs_close();
 206
 207         return ret;
 208 }
 209
 210 int fs_read(const char *filename, ulong addr, int offset, int len)
 211 {
 212         struct fstype_info *info = fs_get_info(fs_type);
 213         void *buf;
 214         int ret;
 215
 216         /*
 217          * We don't actually know how many bytes are being read, since len==0
 218          * means read the whole file.
 219          */
 220         buf = map_sysmem(addr, len);
 221         ret = info->read(filename, buf, offset, len);
 222         unmap_sysmem(buf);
 223
 224         /* If we requested a specific number of bytes, check we got it */
 225         if (ret >= 0 && len && ret != len) {
 226                 printf("** Unable to read file %s **\n", filename);
 227                 ret = -1;
 228         }
 229         fs_close();
 230
 231         return ret;
 232 }
 233
 234 int fs_write(const char *filename, ulong addr, int offset, int len)
 235 {
 236         struct fstype_info *info = fs_get_info(fs_type);
 237         void *buf;
 238         int ret;
 239
 240         buf = map_sysmem(addr, len);
 241         ret = info->write(filename, buf, offset, len);
 242         unmap_sysmem(buf);
 243
 244         if (ret >= 0 && ret != len) {
 245                 printf("** Unable to write file %s **\n", filename);
 246                 ret = -1;
 247         }
 248         fs_close();
 249
 250         return ret;
 251 }
 252
 253 int do_load(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[],
 254                 int fstype)
 255 {
 256         unsigned long addr;
 257         const char *addr_str;
 258         const char *filename;
 259         unsigned long bytes;
 260         unsigned long pos;
 261         int len_read;
 262         unsigned long time;
 263
 264         if (argc < 2)
 265                 return CMD_RET_USAGE;
 266         if (argc > 7)
 267                 return CMD_RET_USAGE;
 268
 269         if (fs_set_blk_dev(argv[1], (argc >= 3) ? argv[2] : NULL, fstype))
 270                 return 1;
 271
 272         if (argc >= 4) {
 273                 addr = simple_strtoul(argv[3], NULL, 16);
 274         } else {
 275                 addr_str = getenv("loadaddr");
 276                 if (addr_str != NULL)
 277                         addr = simple_strtoul(addr_str, NULL, 16);
 278                 else
 279                         addr = CONFIG_SYS_LOAD_ADDR;
 280         }
 281         if (argc >= 5) {
 282                 filename = argv[4];
 283         } else {
 284                 filename = getenv("bootfile");
 285                 if (!filename) {
 286                         puts("** No boot file defined **\n");
 287                         return 1;
 288                 }
 289         }
 290         if (argc >= 6)
 291                 bytes = simple_strtoul(argv[5], NULL, 16);
 292         else
 293                 bytes = 0;
 294         if (argc >= 7)
 295                 pos = simple_strtoul(argv[6], NULL, 16);
 296         else
 297                 pos = 0;
 298
 299         time = get_timer(0);
 300         len_read = fs_read(filename, addr, pos, bytes);
 301         time = get_timer(time);
 302         if (len_read <= 0)
 303                 return 1;
 304
 305         printf("%d bytes read in %lu ms", len_read, time);
 306         if (time > 0) {
 307                 puts(" (");
 308                 print_size(len_read / time * 1000, "/s");
 309                 puts(")");
 310         }
 311         puts("\n");
 312
 313         setenv_hex("filesize", len_read);
 314
 315         return 0;
 316 }
 317
 318 int do_ls(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[],
 319         int fstype)
 320 {
 321         if (argc < 2)
 322                 return CMD_RET_USAGE;
 323         if (argc > 4)
 324                 return CMD_RET_USAGE;
 325
 326         if (fs_set_blk_dev(argv[1], (argc >= 3) ? argv[2] : NULL, fstype))
 327                 return 1;
 328
 329         if (fs_ls(argc >= 4 ? argv[3] : "/"))
 330                 return 1;
 331
 332         return 0;
 333 }
 334
 335 int file_exists(const char *dev_type, const char *dev_part, const char *file,
 336                 int fstype)
 337 {
 338         if (fs_set_blk_dev(dev_type, dev_part, fstype))
 339                 return 0;
 340
 341         return fs_exists(file);
 342 }
 343
 344 int do_save(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[],
 345                 int fstype)
 346 {
 347         unsigned long addr;
 348         const char *filename;
 349         unsigned long bytes;
 350         unsigned long pos;
 351         int len;
 352         unsigned long time;
 353
 354         if (argc < 6 || argc > 7)
 355                 return CMD_RET_USAGE;
 356
 357         if (fs_set_blk_dev(argv[1], argv[2], fstype))
 358                 return 1;
 359
 360         filename = argv[3];
 361         addr = simple_strtoul(argv[4], NULL, 16);
 362         bytes = simple_strtoul(argv[5], NULL, 16);
 363         if (argc >= 7)
 364                 pos = simple_strtoul(argv[6], NULL, 16);
 365         else
 366                 pos = 0;
 367
 368         time = get_timer(0);
 369         len = fs_write(filename, addr, pos, bytes);
 370         time = get_timer(time);
 371         if (len <= 0)
 372                 return 1;
 373
 374         printf("%d bytes written in %lu ms", len, time);
 375         if (time > 0) {
 376                 puts(" (");
 377                 print_size(len / time * 1000, "/s");
 378                 puts(")");
 379         }
 380         puts("\n");
 381
 382         return 0;
 383 }