wdenk | 71f9511 | 2003-06-15 22:40:42 +0000 | [diff] [blame] | 1 | /* |
| 2 | * fat.c |
| 3 | * |
| 4 | * R/O (V)FAT 12/16/32 filesystem implementation by Marcus Sundberg |
| 5 | * |
| 6 | * 2002-07-28 - rjones@nexus-tech.net - ported to ppcboot v1.1.6 |
| 7 | * 2003-03-10 - kharris@nexus-tech.net - ported to uboot |
| 8 | * |
| 9 | * See file CREDITS for list of people who contributed to this |
| 10 | * project. |
| 11 | * |
| 12 | * This program is free software; you can redistribute it and/or |
| 13 | * modify it under the terms of the GNU General Public License as |
| 14 | * published by the Free Software Foundation; either version 2 of |
| 15 | * the License, or (at your option) any later version. |
| 16 | * |
| 17 | * This program is distributed in the hope that it will be useful, |
| 18 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 19 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 20 | * GNU General Public License for more details. |
| 21 | * |
| 22 | * You should have received a copy of the GNU General Public License |
| 23 | * along with this program; if not, write to the Free Software |
| 24 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, |
| 25 | * MA 02111-1307 USA |
| 26 | */ |
| 27 | |
| 28 | #include <common.h> |
| 29 | #include <config.h> |
| 30 | #include <fat.h> |
| 31 | #include <asm/byteorder.h> |
wdenk | 7205e40 | 2003-09-10 22:30:53 +0000 | [diff] [blame] | 32 | #include <part.h> |
wdenk | 71f9511 | 2003-06-15 22:40:42 +0000 | [diff] [blame] | 33 | |
wdenk | 71f9511 | 2003-06-15 22:40:42 +0000 | [diff] [blame] | 34 | /* |
| 35 | * Convert a string to lowercase. |
| 36 | */ |
| 37 | static void |
| 38 | downcase(char *str) |
| 39 | { |
| 40 | while (*str != '\0') { |
| 41 | TOLOWER(*str); |
| 42 | str++; |
| 43 | } |
| 44 | } |
| 45 | |
wdenk | 7205e40 | 2003-09-10 22:30:53 +0000 | [diff] [blame] | 46 | static block_dev_desc_t *cur_dev = NULL; |
| 47 | static unsigned long part_offset = 0; |
| 48 | static int cur_part = 1; |
| 49 | |
| 50 | #define DOS_PART_TBL_OFFSET 0x1be |
| 51 | #define DOS_PART_MAGIC_OFFSET 0x1fe |
| 52 | #define DOS_FS_TYPE_OFFSET 0x36 |
Wolfgang Denk | 66c2d73 | 2010-07-19 11:36:57 +0200 | [diff] [blame] | 53 | #define DOS_FS32_TYPE_OFFSET 0x52 |
wdenk | 71f9511 | 2003-06-15 22:40:42 +0000 | [diff] [blame] | 54 | |
| 55 | int disk_read (__u32 startblock, __u32 getsize, __u8 * bufptr) |
| 56 | { |
wdenk | 7205e40 | 2003-09-10 22:30:53 +0000 | [diff] [blame] | 57 | startblock += part_offset; |
| 58 | if (cur_dev == NULL) |
| 59 | return -1; |
| 60 | if (cur_dev->block_read) { |
Peter Pearse | 3e3b956 | 2007-05-18 16:47:03 +0100 | [diff] [blame] | 61 | return cur_dev->block_read (cur_dev->dev |
| 62 | , startblock, getsize, (unsigned long *)bufptr); |
wdenk | 71f9511 | 2003-06-15 22:40:42 +0000 | [diff] [blame] | 63 | } |
| 64 | return -1; |
| 65 | } |
| 66 | |
| 67 | |
| 68 | int |
wdenk | 7205e40 | 2003-09-10 22:30:53 +0000 | [diff] [blame] | 69 | fat_register_device(block_dev_desc_t *dev_desc, int part_no) |
wdenk | 71f9511 | 2003-06-15 22:40:42 +0000 | [diff] [blame] | 70 | { |
wdenk | 7205e40 | 2003-09-10 22:30:53 +0000 | [diff] [blame] | 71 | unsigned char buffer[SECTOR_SIZE]; |
Heiko Schocher | 566a494 | 2007-06-22 19:11:54 +0200 | [diff] [blame] | 72 | disk_partition_t info; |
wdenk | 7205e40 | 2003-09-10 22:30:53 +0000 | [diff] [blame] | 73 | |
| 74 | if (!dev_desc->block_read) |
| 75 | return -1; |
Heiko Schocher | 566a494 | 2007-06-22 19:11:54 +0200 | [diff] [blame] | 76 | cur_dev = dev_desc; |
wdenk | 7205e40 | 2003-09-10 22:30:53 +0000 | [diff] [blame] | 77 | /* check if we have a MBR (on floppies we have only a PBR) */ |
| 78 | if (dev_desc->block_read (dev_desc->dev, 0, 1, (ulong *) buffer) != 1) { |
| 79 | printf ("** Can't read from device %d **\n", dev_desc->dev); |
| 80 | return -1; |
| 81 | } |
| 82 | if (buffer[DOS_PART_MAGIC_OFFSET] != 0x55 || |
| 83 | buffer[DOS_PART_MAGIC_OFFSET + 1] != 0xaa) { |
| 84 | /* no signature found */ |
| 85 | return -1; |
| 86 | } |
Jon Loeliger | dd60d12 | 2007-07-09 17:56:50 -0500 | [diff] [blame] | 87 | #if (defined(CONFIG_CMD_IDE) || \ |
unsik Kim | 75eb82e | 2009-02-25 11:31:24 +0900 | [diff] [blame] | 88 | defined(CONFIG_CMD_MG_DISK) || \ |
Sonic Zhang | 8c5170a | 2008-12-09 23:20:18 -0500 | [diff] [blame] | 89 | defined(CONFIG_CMD_SATA) || \ |
Jon Loeliger | dd60d12 | 2007-07-09 17:56:50 -0500 | [diff] [blame] | 90 | defined(CONFIG_CMD_SCSI) || \ |
| 91 | defined(CONFIG_CMD_USB) || \ |
Andy Fleming | 02df4a2 | 2008-01-09 13:51:32 -0600 | [diff] [blame] | 92 | defined(CONFIG_MMC) || \ |
| 93 | defined(CONFIG_SYSTEMACE) ) |
| 94 | /* First we assume, there is a MBR */ |
| 95 | if (!get_partition_info (dev_desc, part_no, &info)) { |
| 96 | part_offset = info.start; |
| 97 | cur_part = part_no; |
Wolfgang Denk | 66c2d73 | 2010-07-19 11:36:57 +0200 | [diff] [blame] | 98 | } else if (strncmp((char *)&buffer[DOS_FS_TYPE_OFFSET], "FAT", 3)==0 || |
| 99 | strncmp((char *)&buffer[DOS_FS32_TYPE_OFFSET],"FAT32",5)==0) { |
Andy Fleming | 02df4a2 | 2008-01-09 13:51:32 -0600 | [diff] [blame] | 100 | /* ok, we assume we are on a PBR only */ |
| 101 | cur_part = 1; |
| 102 | part_offset = 0; |
| 103 | } else { |
| 104 | printf ("** Partition %d not valid on device %d **\n", |
Wolfgang Denk | bf1060e | 2007-08-07 16:02:13 +0200 | [diff] [blame] | 105 | part_no, dev_desc->dev); |
Andy Fleming | 02df4a2 | 2008-01-09 13:51:32 -0600 | [diff] [blame] | 106 | return -1; |
Wolfgang Denk | bf1060e | 2007-08-07 16:02:13 +0200 | [diff] [blame] | 107 | } |
Andy Fleming | 02df4a2 | 2008-01-09 13:51:32 -0600 | [diff] [blame] | 108 | |
| 109 | #else |
Wolfgang Denk | 66c2d73 | 2010-07-19 11:36:57 +0200 | [diff] [blame] | 110 | if ((strncmp((char *)&buffer[DOS_FS_TYPE_OFFSET], "FAT", 3) == 0) || |
| 111 | (strncmp((char *)&buffer[DOS_FS32_TYPE_OFFSET], "FAT32", 5) == 0)) { |
Andy Fleming | 02df4a2 | 2008-01-09 13:51:32 -0600 | [diff] [blame] | 112 | /* ok, we assume we are on a PBR only */ |
| 113 | cur_part = 1; |
| 114 | part_offset = 0; |
| 115 | info.start = part_offset; |
| 116 | } else { |
| 117 | /* FIXME we need to determine the start block of the |
| 118 | * partition where the DOS FS resides. This can be done |
| 119 | * by using the get_partition_info routine. For this |
| 120 | * purpose the libpart must be included. |
| 121 | */ |
| 122 | part_offset = 32; |
| 123 | cur_part = 1; |
| 124 | } |
| 125 | #endif |
wdenk | 71f9511 | 2003-06-15 22:40:42 +0000 | [diff] [blame] | 126 | return 0; |
| 127 | } |
| 128 | |
| 129 | |
| 130 | /* |
| 131 | * Get the first occurence of a directory delimiter ('/' or '\') in a string. |
| 132 | * Return index into string if found, -1 otherwise. |
| 133 | */ |
| 134 | static int |
| 135 | dirdelim(char *str) |
| 136 | { |
| 137 | char *start = str; |
| 138 | |
| 139 | while (*str != '\0') { |
| 140 | if (ISDIRDELIM(*str)) return str - start; |
| 141 | str++; |
| 142 | } |
| 143 | return -1; |
| 144 | } |
| 145 | |
wdenk | 71f9511 | 2003-06-15 22:40:42 +0000 | [diff] [blame] | 146 | /* |
| 147 | * Extract zero terminated short name from a directory entry. |
| 148 | */ |
| 149 | static void get_name (dir_entry *dirent, char *s_name) |
| 150 | { |
| 151 | char *ptr; |
| 152 | |
| 153 | memcpy (s_name, dirent->name, 8); |
| 154 | s_name[8] = '\0'; |
| 155 | ptr = s_name; |
| 156 | while (*ptr && *ptr != ' ') |
| 157 | ptr++; |
| 158 | if (dirent->ext[0] && dirent->ext[0] != ' ') { |
| 159 | *ptr = '.'; |
| 160 | ptr++; |
| 161 | memcpy (ptr, dirent->ext, 3); |
| 162 | ptr[3] = '\0'; |
| 163 | while (*ptr && *ptr != ' ') |
| 164 | ptr++; |
| 165 | } |
| 166 | *ptr = '\0'; |
| 167 | if (*s_name == DELETED_FLAG) |
| 168 | *s_name = '\0'; |
| 169 | else if (*s_name == aRING) |
Remy Bohmer | 3c2c2f4 | 2008-11-27 22:30:27 +0100 | [diff] [blame] | 170 | *s_name = DELETED_FLAG; |
wdenk | 71f9511 | 2003-06-15 22:40:42 +0000 | [diff] [blame] | 171 | downcase (s_name); |
| 172 | } |
| 173 | |
| 174 | /* |
| 175 | * Get the entry at index 'entry' in a FAT (12/16/32) table. |
| 176 | * On failure 0x00 is returned. |
| 177 | */ |
| 178 | static __u32 |
| 179 | get_fatent(fsdata *mydata, __u32 entry) |
| 180 | { |
| 181 | __u32 bufnum; |
| 182 | __u32 offset; |
| 183 | __u32 ret = 0x00; |
| 184 | |
| 185 | switch (mydata->fatsize) { |
| 186 | case 32: |
| 187 | bufnum = entry / FAT32BUFSIZE; |
| 188 | offset = entry - bufnum * FAT32BUFSIZE; |
| 189 | break; |
| 190 | case 16: |
| 191 | bufnum = entry / FAT16BUFSIZE; |
| 192 | offset = entry - bufnum * FAT16BUFSIZE; |
| 193 | break; |
| 194 | case 12: |
| 195 | bufnum = entry / FAT12BUFSIZE; |
| 196 | offset = entry - bufnum * FAT12BUFSIZE; |
| 197 | break; |
| 198 | |
| 199 | default: |
| 200 | /* Unsupported FAT size */ |
| 201 | return ret; |
| 202 | } |
| 203 | |
Wolfgang Denk | 2aa98c6 | 2010-07-19 11:36:58 +0200 | [diff] [blame^] | 204 | FAT_DPRINT("FAT%d: entry: 0x%04x = %d, offset: 0x%04x = %d\n", |
| 205 | mydata->fatsize, entry, entry, offset, offset); |
| 206 | |
wdenk | 71f9511 | 2003-06-15 22:40:42 +0000 | [diff] [blame] | 207 | /* Read a new block of FAT entries into the cache. */ |
| 208 | if (bufnum != mydata->fatbufnum) { |
| 209 | int getsize = FATBUFSIZE/FS_BLOCK_SIZE; |
| 210 | __u8 *bufptr = mydata->fatbuf; |
| 211 | __u32 fatlength = mydata->fatlength; |
| 212 | __u32 startblock = bufnum * FATBUFBLOCKS; |
| 213 | |
| 214 | fatlength *= SECTOR_SIZE; /* We want it in bytes now */ |
| 215 | startblock += mydata->fat_sect; /* Offset from start of disk */ |
| 216 | |
| 217 | if (getsize > fatlength) getsize = fatlength; |
| 218 | if (disk_read(startblock, getsize, bufptr) < 0) { |
| 219 | FAT_DPRINT("Error reading FAT blocks\n"); |
| 220 | return ret; |
| 221 | } |
| 222 | mydata->fatbufnum = bufnum; |
| 223 | } |
| 224 | |
| 225 | /* Get the actual entry from the table */ |
| 226 | switch (mydata->fatsize) { |
| 227 | case 32: |
| 228 | ret = FAT2CPU32(((__u32*)mydata->fatbuf)[offset]); |
| 229 | break; |
| 230 | case 16: |
| 231 | ret = FAT2CPU16(((__u16*)mydata->fatbuf)[offset]); |
| 232 | break; |
| 233 | case 12: { |
| 234 | __u32 off16 = (offset*3)/4; |
| 235 | __u16 val1, val2; |
| 236 | |
| 237 | switch (offset & 0x3) { |
| 238 | case 0: |
| 239 | ret = FAT2CPU16(((__u16*)mydata->fatbuf)[off16]); |
| 240 | ret &= 0xfff; |
| 241 | break; |
| 242 | case 1: |
| 243 | val1 = FAT2CPU16(((__u16*)mydata->fatbuf)[off16]); |
| 244 | val1 &= 0xf000; |
| 245 | val2 = FAT2CPU16(((__u16*)mydata->fatbuf)[off16+1]); |
| 246 | val2 &= 0x00ff; |
| 247 | ret = (val2 << 4) | (val1 >> 12); |
| 248 | break; |
| 249 | case 2: |
| 250 | val1 = FAT2CPU16(((__u16*)mydata->fatbuf)[off16]); |
| 251 | val1 &= 0xff00; |
| 252 | val2 = FAT2CPU16(((__u16*)mydata->fatbuf)[off16+1]); |
| 253 | val2 &= 0x000f; |
| 254 | ret = (val2 << 8) | (val1 >> 8); |
| 255 | break; |
| 256 | case 3: |
| 257 | ret = FAT2CPU16(((__u16*)mydata->fatbuf)[off16]);; |
| 258 | ret = (ret & 0xfff0) >> 4; |
| 259 | break; |
| 260 | default: |
| 261 | break; |
| 262 | } |
| 263 | } |
| 264 | break; |
| 265 | } |
Wolfgang Denk | 2aa98c6 | 2010-07-19 11:36:58 +0200 | [diff] [blame^] | 266 | FAT_DPRINT("FAT%d: ret: %08x, offset: %04x\n", |
| 267 | mydata->fatsize, ret, offset); |
wdenk | 71f9511 | 2003-06-15 22:40:42 +0000 | [diff] [blame] | 268 | |
| 269 | return ret; |
| 270 | } |
| 271 | |
| 272 | |
| 273 | /* |
| 274 | * Read at most 'size' bytes from the specified cluster into 'buffer'. |
| 275 | * Return 0 on success, -1 otherwise. |
| 276 | */ |
| 277 | static int |
| 278 | get_cluster(fsdata *mydata, __u32 clustnum, __u8 *buffer, unsigned long size) |
| 279 | { |
| 280 | int idx = 0; |
| 281 | __u32 startsect; |
| 282 | |
| 283 | if (clustnum > 0) { |
| 284 | startsect = mydata->data_begin + clustnum*mydata->clust_size; |
| 285 | } else { |
| 286 | startsect = mydata->rootdir_sect; |
| 287 | } |
| 288 | |
| 289 | FAT_DPRINT("gc - clustnum: %d, startsect: %d\n", clustnum, startsect); |
wdenk | 7205e40 | 2003-09-10 22:30:53 +0000 | [diff] [blame] | 290 | if (disk_read(startsect, size/FS_BLOCK_SIZE , buffer) < 0) { |
| 291 | FAT_DPRINT("Error reading data\n"); |
| 292 | return -1; |
| 293 | } |
| 294 | if(size % FS_BLOCK_SIZE) { |
| 295 | __u8 tmpbuf[FS_BLOCK_SIZE]; |
| 296 | idx= size/FS_BLOCK_SIZE; |
| 297 | if (disk_read(startsect + idx, 1, tmpbuf) < 0) { |
| 298 | FAT_DPRINT("Error reading data\n"); |
| 299 | return -1; |
wdenk | 71f9511 | 2003-06-15 22:40:42 +0000 | [diff] [blame] | 300 | } |
wdenk | 7205e40 | 2003-09-10 22:30:53 +0000 | [diff] [blame] | 301 | buffer += idx*FS_BLOCK_SIZE; |
| 302 | |
| 303 | memcpy(buffer, tmpbuf, size % FS_BLOCK_SIZE); |
| 304 | return 0; |
wdenk | 71f9511 | 2003-06-15 22:40:42 +0000 | [diff] [blame] | 305 | } |
| 306 | |
| 307 | return 0; |
| 308 | } |
| 309 | |
| 310 | |
| 311 | /* |
| 312 | * Read at most 'maxsize' bytes from the file associated with 'dentptr' |
| 313 | * into 'buffer'. |
| 314 | * Return the number of bytes read or -1 on fatal errors. |
| 315 | */ |
| 316 | static long |
| 317 | get_contents(fsdata *mydata, dir_entry *dentptr, __u8 *buffer, |
| 318 | unsigned long maxsize) |
| 319 | { |
| 320 | unsigned long filesize = FAT2CPU32(dentptr->size), gotsize = 0; |
| 321 | unsigned int bytesperclust = mydata->clust_size * SECTOR_SIZE; |
| 322 | __u32 curclust = START(dentptr); |
wdenk | 7205e40 | 2003-09-10 22:30:53 +0000 | [diff] [blame] | 323 | __u32 endclust, newclust; |
| 324 | unsigned long actsize; |
wdenk | 71f9511 | 2003-06-15 22:40:42 +0000 | [diff] [blame] | 325 | |
| 326 | FAT_DPRINT("Filesize: %ld bytes\n", filesize); |
| 327 | |
| 328 | if (maxsize > 0 && filesize > maxsize) filesize = maxsize; |
| 329 | |
Wolfgang Denk | 2aa98c6 | 2010-07-19 11:36:58 +0200 | [diff] [blame^] | 330 | FAT_DPRINT("%ld bytes\n", filesize); |
wdenk | 71f9511 | 2003-06-15 22:40:42 +0000 | [diff] [blame] | 331 | |
wdenk | 7205e40 | 2003-09-10 22:30:53 +0000 | [diff] [blame] | 332 | actsize=bytesperclust; |
| 333 | endclust=curclust; |
wdenk | 71f9511 | 2003-06-15 22:40:42 +0000 | [diff] [blame] | 334 | do { |
wdenk | 7205e40 | 2003-09-10 22:30:53 +0000 | [diff] [blame] | 335 | /* search for consecutive clusters */ |
| 336 | while(actsize < filesize) { |
| 337 | newclust = get_fatent(mydata, endclust); |
| 338 | if((newclust -1)!=endclust) |
| 339 | goto getit; |
michael | 8ce4e5c | 2008-03-02 23:33:46 +0100 | [diff] [blame] | 340 | if (CHECK_CLUST(newclust, mydata->fatsize)) { |
wdenk | 7205e40 | 2003-09-10 22:30:53 +0000 | [diff] [blame] | 341 | FAT_DPRINT("curclust: 0x%x\n", newclust); |
| 342 | FAT_DPRINT("Invalid FAT entry\n"); |
| 343 | return gotsize; |
| 344 | } |
| 345 | endclust=newclust; |
| 346 | actsize+= bytesperclust; |
| 347 | } |
| 348 | /* actsize >= file size */ |
| 349 | actsize -= bytesperclust; |
| 350 | /* get remaining clusters */ |
| 351 | if (get_cluster(mydata, curclust, buffer, (int)actsize) != 0) { |
wdenk | 71f9511 | 2003-06-15 22:40:42 +0000 | [diff] [blame] | 352 | FAT_ERROR("Error reading cluster\n"); |
| 353 | return -1; |
| 354 | } |
wdenk | 7205e40 | 2003-09-10 22:30:53 +0000 | [diff] [blame] | 355 | /* get remaining bytes */ |
| 356 | gotsize += (int)actsize; |
| 357 | filesize -= actsize; |
| 358 | buffer += actsize; |
| 359 | actsize= filesize; |
| 360 | if (get_cluster(mydata, endclust, buffer, (int)actsize) != 0) { |
| 361 | FAT_ERROR("Error reading cluster\n"); |
| 362 | return -1; |
| 363 | } |
| 364 | gotsize+=actsize; |
| 365 | return gotsize; |
| 366 | getit: |
| 367 | if (get_cluster(mydata, curclust, buffer, (int)actsize) != 0) { |
| 368 | FAT_ERROR("Error reading cluster\n"); |
| 369 | return -1; |
| 370 | } |
| 371 | gotsize += (int)actsize; |
| 372 | filesize -= actsize; |
| 373 | buffer += actsize; |
| 374 | curclust = get_fatent(mydata, endclust); |
michael | 8ce4e5c | 2008-03-02 23:33:46 +0100 | [diff] [blame] | 375 | if (CHECK_CLUST(curclust, mydata->fatsize)) { |
wdenk | 71f9511 | 2003-06-15 22:40:42 +0000 | [diff] [blame] | 376 | FAT_DPRINT("curclust: 0x%x\n", curclust); |
| 377 | FAT_ERROR("Invalid FAT entry\n"); |
| 378 | return gotsize; |
| 379 | } |
wdenk | 7205e40 | 2003-09-10 22:30:53 +0000 | [diff] [blame] | 380 | actsize=bytesperclust; |
| 381 | endclust=curclust; |
wdenk | 71f9511 | 2003-06-15 22:40:42 +0000 | [diff] [blame] | 382 | } while (1); |
| 383 | } |
| 384 | |
| 385 | |
| 386 | #ifdef CONFIG_SUPPORT_VFAT |
| 387 | /* |
| 388 | * Extract the file name information from 'slotptr' into 'l_name', |
| 389 | * starting at l_name[*idx]. |
| 390 | * Return 1 if terminator (zero byte) is found, 0 otherwise. |
| 391 | */ |
| 392 | static int |
| 393 | slot2str(dir_slot *slotptr, char *l_name, int *idx) |
| 394 | { |
| 395 | int j; |
| 396 | |
| 397 | for (j = 0; j <= 8; j += 2) { |
| 398 | l_name[*idx] = slotptr->name0_4[j]; |
| 399 | if (l_name[*idx] == 0x00) return 1; |
| 400 | (*idx)++; |
| 401 | } |
| 402 | for (j = 0; j <= 10; j += 2) { |
| 403 | l_name[*idx] = slotptr->name5_10[j]; |
| 404 | if (l_name[*idx] == 0x00) return 1; |
| 405 | (*idx)++; |
| 406 | } |
| 407 | for (j = 0; j <= 2; j += 2) { |
| 408 | l_name[*idx] = slotptr->name11_12[j]; |
| 409 | if (l_name[*idx] == 0x00) return 1; |
| 410 | (*idx)++; |
| 411 | } |
| 412 | |
| 413 | return 0; |
| 414 | } |
| 415 | |
| 416 | |
| 417 | /* |
| 418 | * Extract the full long filename starting at 'retdent' (which is really |
| 419 | * a slot) into 'l_name'. If successful also copy the real directory entry |
| 420 | * into 'retdent' |
| 421 | * Return 0 on success, -1 otherwise. |
| 422 | */ |
Bryan Wu | 7e4b9b4 | 2009-01-02 20:47:45 -0500 | [diff] [blame] | 423 | __attribute__ ((__aligned__(__alignof__(dir_entry)))) |
| 424 | __u8 get_vfatname_block[MAX_CLUSTSIZE]; |
wdenk | 71f9511 | 2003-06-15 22:40:42 +0000 | [diff] [blame] | 425 | static int |
| 426 | get_vfatname(fsdata *mydata, int curclust, __u8 *cluster, |
| 427 | dir_entry *retdent, char *l_name) |
| 428 | { |
| 429 | dir_entry *realdent; |
| 430 | dir_slot *slotptr = (dir_slot*) retdent; |
| 431 | __u8 *nextclust = cluster + mydata->clust_size * SECTOR_SIZE; |
wdenk | 2d1a537 | 2004-02-23 19:30:57 +0000 | [diff] [blame] | 432 | __u8 counter = (slotptr->id & ~LAST_LONG_ENTRY_MASK) & 0xff; |
wdenk | 71f9511 | 2003-06-15 22:40:42 +0000 | [diff] [blame] | 433 | int idx = 0; |
| 434 | |
| 435 | while ((__u8*)slotptr < nextclust) { |
| 436 | if (counter == 0) break; |
wdenk | 2d1a537 | 2004-02-23 19:30:57 +0000 | [diff] [blame] | 437 | if (((slotptr->id & ~LAST_LONG_ENTRY_MASK) & 0xff) != counter) |
| 438 | return -1; |
wdenk | 71f9511 | 2003-06-15 22:40:42 +0000 | [diff] [blame] | 439 | slotptr++; |
| 440 | counter--; |
| 441 | } |
| 442 | |
| 443 | if ((__u8*)slotptr >= nextclust) { |
wdenk | 71f9511 | 2003-06-15 22:40:42 +0000 | [diff] [blame] | 444 | dir_slot *slotptr2; |
| 445 | |
| 446 | slotptr--; |
| 447 | curclust = get_fatent(mydata, curclust); |
michael | 8ce4e5c | 2008-03-02 23:33:46 +0100 | [diff] [blame] | 448 | if (CHECK_CLUST(curclust, mydata->fatsize)) { |
wdenk | 71f9511 | 2003-06-15 22:40:42 +0000 | [diff] [blame] | 449 | FAT_DPRINT("curclust: 0x%x\n", curclust); |
| 450 | FAT_ERROR("Invalid FAT entry\n"); |
| 451 | return -1; |
| 452 | } |
wdenk | 5fa66df | 2003-10-29 23:18:55 +0000 | [diff] [blame] | 453 | if (get_cluster(mydata, curclust, get_vfatname_block, |
wdenk | 71f9511 | 2003-06-15 22:40:42 +0000 | [diff] [blame] | 454 | mydata->clust_size * SECTOR_SIZE) != 0) { |
| 455 | FAT_DPRINT("Error: reading directory block\n"); |
| 456 | return -1; |
| 457 | } |
wdenk | 5fa66df | 2003-10-29 23:18:55 +0000 | [diff] [blame] | 458 | slotptr2 = (dir_slot*) get_vfatname_block; |
wdenk | 71f9511 | 2003-06-15 22:40:42 +0000 | [diff] [blame] | 459 | while (slotptr2->id > 0x01) { |
| 460 | slotptr2++; |
| 461 | } |
| 462 | /* Save the real directory entry */ |
| 463 | realdent = (dir_entry*)slotptr2 + 1; |
wdenk | 5fa66df | 2003-10-29 23:18:55 +0000 | [diff] [blame] | 464 | while ((__u8*)slotptr2 >= get_vfatname_block) { |
wdenk | 71f9511 | 2003-06-15 22:40:42 +0000 | [diff] [blame] | 465 | slot2str(slotptr2, l_name, &idx); |
| 466 | slotptr2--; |
| 467 | } |
| 468 | } else { |
| 469 | /* Save the real directory entry */ |
| 470 | realdent = (dir_entry*)slotptr; |
| 471 | } |
| 472 | |
| 473 | do { |
| 474 | slotptr--; |
| 475 | if (slot2str(slotptr, l_name, &idx)) break; |
wdenk | 2d1a537 | 2004-02-23 19:30:57 +0000 | [diff] [blame] | 476 | } while (!(slotptr->id & LAST_LONG_ENTRY_MASK)); |
wdenk | 71f9511 | 2003-06-15 22:40:42 +0000 | [diff] [blame] | 477 | |
| 478 | l_name[idx] = '\0'; |
| 479 | if (*l_name == DELETED_FLAG) *l_name = '\0'; |
Remy Bohmer | 3c2c2f4 | 2008-11-27 22:30:27 +0100 | [diff] [blame] | 480 | else if (*l_name == aRING) *l_name = DELETED_FLAG; |
wdenk | 71f9511 | 2003-06-15 22:40:42 +0000 | [diff] [blame] | 481 | downcase(l_name); |
| 482 | |
| 483 | /* Return the real directory entry */ |
| 484 | memcpy(retdent, realdent, sizeof(dir_entry)); |
| 485 | |
| 486 | return 0; |
| 487 | } |
| 488 | |
| 489 | |
| 490 | /* Calculate short name checksum */ |
| 491 | static __u8 |
| 492 | mkcksum(const char *str) |
| 493 | { |
| 494 | int i; |
| 495 | __u8 ret = 0; |
| 496 | |
| 497 | for (i = 0; i < 11; i++) { |
| 498 | ret = (((ret&1)<<7)|((ret&0xfe)>>1)) + str[i]; |
| 499 | } |
| 500 | |
| 501 | return ret; |
| 502 | } |
| 503 | #endif |
| 504 | |
| 505 | |
| 506 | /* |
| 507 | * Get the directory entry associated with 'filename' from the directory |
| 508 | * starting at 'startsect' |
| 509 | */ |
Bryan Wu | 7e4b9b4 | 2009-01-02 20:47:45 -0500 | [diff] [blame] | 510 | __attribute__ ((__aligned__(__alignof__(dir_entry)))) |
wdenk | 5fa66df | 2003-10-29 23:18:55 +0000 | [diff] [blame] | 511 | __u8 get_dentfromdir_block[MAX_CLUSTSIZE]; |
wdenk | 71f9511 | 2003-06-15 22:40:42 +0000 | [diff] [blame] | 512 | static dir_entry *get_dentfromdir (fsdata * mydata, int startsect, |
| 513 | char *filename, dir_entry * retdent, |
| 514 | int dols) |
| 515 | { |
| 516 | __u16 prevcksum = 0xffff; |
wdenk | 71f9511 | 2003-06-15 22:40:42 +0000 | [diff] [blame] | 517 | __u32 curclust = START (retdent); |
| 518 | int files = 0, dirs = 0; |
| 519 | |
| 520 | FAT_DPRINT ("get_dentfromdir: %s\n", filename); |
| 521 | while (1) { |
| 522 | dir_entry *dentptr; |
| 523 | int i; |
| 524 | |
wdenk | 5fa66df | 2003-10-29 23:18:55 +0000 | [diff] [blame] | 525 | if (get_cluster (mydata, curclust, get_dentfromdir_block, |
wdenk | 71f9511 | 2003-06-15 22:40:42 +0000 | [diff] [blame] | 526 | mydata->clust_size * SECTOR_SIZE) != 0) { |
| 527 | FAT_DPRINT ("Error: reading directory block\n"); |
| 528 | return NULL; |
| 529 | } |
wdenk | 5fa66df | 2003-10-29 23:18:55 +0000 | [diff] [blame] | 530 | dentptr = (dir_entry *) get_dentfromdir_block; |
wdenk | 71f9511 | 2003-06-15 22:40:42 +0000 | [diff] [blame] | 531 | for (i = 0; i < DIRENTSPERCLUST; i++) { |
| 532 | char s_name[14], l_name[256]; |
| 533 | |
| 534 | l_name[0] = '\0'; |
wdenk | 855a496 | 2004-03-14 18:23:55 +0000 | [diff] [blame] | 535 | if (dentptr->name[0] == DELETED_FLAG) { |
| 536 | dentptr++; |
| 537 | continue; |
| 538 | } |
wdenk | 71f9511 | 2003-06-15 22:40:42 +0000 | [diff] [blame] | 539 | if ((dentptr->attr & ATTR_VOLUME)) { |
| 540 | #ifdef CONFIG_SUPPORT_VFAT |
| 541 | if ((dentptr->attr & ATTR_VFAT) && |
wdenk | 2d1a537 | 2004-02-23 19:30:57 +0000 | [diff] [blame] | 542 | (dentptr->name[0] & LAST_LONG_ENTRY_MASK)) { |
wdenk | 71f9511 | 2003-06-15 22:40:42 +0000 | [diff] [blame] | 543 | prevcksum = ((dir_slot *) dentptr) |
| 544 | ->alias_checksum; |
wdenk | 5fa66df | 2003-10-29 23:18:55 +0000 | [diff] [blame] | 545 | get_vfatname (mydata, curclust, get_dentfromdir_block, |
wdenk | 71f9511 | 2003-06-15 22:40:42 +0000 | [diff] [blame] | 546 | dentptr, l_name); |
| 547 | if (dols) { |
| 548 | int isdir = (dentptr->attr & ATTR_DIR); |
| 549 | char dirc; |
| 550 | int doit = 0; |
| 551 | |
| 552 | if (isdir) { |
| 553 | dirs++; |
| 554 | dirc = '/'; |
| 555 | doit = 1; |
| 556 | } else { |
| 557 | dirc = ' '; |
| 558 | if (l_name[0] != 0) { |
| 559 | files++; |
| 560 | doit = 1; |
| 561 | } |
| 562 | } |
| 563 | if (doit) { |
| 564 | if (dirc == ' ') { |
| 565 | printf (" %8ld %s%c\n", |
| 566 | (long) FAT2CPU32 (dentptr->size), |
| 567 | l_name, dirc); |
| 568 | } else { |
| 569 | printf (" %s%c\n", l_name, dirc); |
| 570 | } |
| 571 | } |
| 572 | dentptr++; |
| 573 | continue; |
| 574 | } |
| 575 | FAT_DPRINT ("vfatname: |%s|\n", l_name); |
| 576 | } else |
| 577 | #endif |
| 578 | { |
| 579 | /* Volume label or VFAT entry */ |
| 580 | dentptr++; |
| 581 | continue; |
| 582 | } |
| 583 | } |
| 584 | if (dentptr->name[0] == 0) { |
| 585 | if (dols) { |
| 586 | printf ("\n%d file(s), %d dir(s)\n\n", files, dirs); |
| 587 | } |
| 588 | FAT_DPRINT ("Dentname == NULL - %d\n", i); |
| 589 | return NULL; |
| 590 | } |
| 591 | #ifdef CONFIG_SUPPORT_VFAT |
| 592 | if (dols && mkcksum (dentptr->name) == prevcksum) { |
| 593 | dentptr++; |
| 594 | continue; |
| 595 | } |
| 596 | #endif |
| 597 | get_name (dentptr, s_name); |
| 598 | if (dols) { |
| 599 | int isdir = (dentptr->attr & ATTR_DIR); |
| 600 | char dirc; |
| 601 | int doit = 0; |
| 602 | |
| 603 | if (isdir) { |
| 604 | dirs++; |
| 605 | dirc = '/'; |
| 606 | doit = 1; |
| 607 | } else { |
| 608 | dirc = ' '; |
| 609 | if (s_name[0] != 0) { |
| 610 | files++; |
| 611 | doit = 1; |
| 612 | } |
| 613 | } |
| 614 | if (doit) { |
| 615 | if (dirc == ' ') { |
| 616 | printf (" %8ld %s%c\n", |
| 617 | (long) FAT2CPU32 (dentptr->size), s_name, |
| 618 | dirc); |
| 619 | } else { |
| 620 | printf (" %s%c\n", s_name, dirc); |
| 621 | } |
| 622 | } |
| 623 | dentptr++; |
| 624 | continue; |
| 625 | } |
| 626 | if (strcmp (filename, s_name) && strcmp (filename, l_name)) { |
| 627 | FAT_DPRINT ("Mismatch: |%s|%s|\n", s_name, l_name); |
| 628 | dentptr++; |
| 629 | continue; |
| 630 | } |
| 631 | memcpy (retdent, dentptr, sizeof (dir_entry)); |
| 632 | |
| 633 | FAT_DPRINT ("DentName: %s", s_name); |
| 634 | FAT_DPRINT (", start: 0x%x", START (dentptr)); |
| 635 | FAT_DPRINT (", size: 0x%x %s\n", |
| 636 | FAT2CPU32 (dentptr->size), |
| 637 | (dentptr->attr & ATTR_DIR) ? "(DIR)" : ""); |
| 638 | |
| 639 | return retdent; |
| 640 | } |
| 641 | curclust = get_fatent (mydata, curclust); |
michael | 8ce4e5c | 2008-03-02 23:33:46 +0100 | [diff] [blame] | 642 | if (CHECK_CLUST(curclust, mydata->fatsize)) { |
wdenk | 71f9511 | 2003-06-15 22:40:42 +0000 | [diff] [blame] | 643 | FAT_DPRINT ("curclust: 0x%x\n", curclust); |
| 644 | FAT_ERROR ("Invalid FAT entry\n"); |
| 645 | return NULL; |
| 646 | } |
| 647 | } |
| 648 | |
| 649 | return NULL; |
| 650 | } |
| 651 | |
| 652 | |
| 653 | /* |
| 654 | * Read boot sector and volume info from a FAT filesystem |
| 655 | */ |
| 656 | static int |
| 657 | read_bootsectandvi(boot_sector *bs, volume_info *volinfo, int *fatsize) |
| 658 | { |
| 659 | __u8 block[FS_BLOCK_SIZE]; |
| 660 | volume_info *vistart; |
| 661 | |
| 662 | if (disk_read(0, 1, block) < 0) { |
| 663 | FAT_DPRINT("Error: reading block\n"); |
| 664 | return -1; |
| 665 | } |
| 666 | |
| 667 | memcpy(bs, block, sizeof(boot_sector)); |
| 668 | bs->reserved = FAT2CPU16(bs->reserved); |
| 669 | bs->fat_length = FAT2CPU16(bs->fat_length); |
| 670 | bs->secs_track = FAT2CPU16(bs->secs_track); |
| 671 | bs->heads = FAT2CPU16(bs->heads); |
| 672 | #if 0 /* UNUSED */ |
| 673 | bs->hidden = FAT2CPU32(bs->hidden); |
| 674 | #endif |
| 675 | bs->total_sect = FAT2CPU32(bs->total_sect); |
| 676 | |
| 677 | /* FAT32 entries */ |
| 678 | if (bs->fat_length == 0) { |
| 679 | /* Assume FAT32 */ |
| 680 | bs->fat32_length = FAT2CPU32(bs->fat32_length); |
| 681 | bs->flags = FAT2CPU16(bs->flags); |
| 682 | bs->root_cluster = FAT2CPU32(bs->root_cluster); |
| 683 | bs->info_sector = FAT2CPU16(bs->info_sector); |
| 684 | bs->backup_boot = FAT2CPU16(bs->backup_boot); |
| 685 | vistart = (volume_info*) (block + sizeof(boot_sector)); |
| 686 | *fatsize = 32; |
| 687 | } else { |
| 688 | vistart = (volume_info*) &(bs->fat32_length); |
| 689 | *fatsize = 0; |
| 690 | } |
| 691 | memcpy(volinfo, vistart, sizeof(volume_info)); |
| 692 | |
wdenk | 71f9511 | 2003-06-15 22:40:42 +0000 | [diff] [blame] | 693 | if (*fatsize == 32) { |
Tom Rix | 651351f | 2009-05-20 07:55:41 -0500 | [diff] [blame] | 694 | if (strncmp(FAT32_SIGN, vistart->fs_type, SIGNLEN) == 0) { |
wdenk | 71f9511 | 2003-06-15 22:40:42 +0000 | [diff] [blame] | 695 | return 0; |
| 696 | } |
| 697 | } else { |
Tom Rix | 651351f | 2009-05-20 07:55:41 -0500 | [diff] [blame] | 698 | if (strncmp(FAT12_SIGN, vistart->fs_type, SIGNLEN) == 0) { |
wdenk | 71f9511 | 2003-06-15 22:40:42 +0000 | [diff] [blame] | 699 | *fatsize = 12; |
| 700 | return 0; |
| 701 | } |
Tom Rix | 651351f | 2009-05-20 07:55:41 -0500 | [diff] [blame] | 702 | if (strncmp(FAT16_SIGN, vistart->fs_type, SIGNLEN) == 0) { |
wdenk | 71f9511 | 2003-06-15 22:40:42 +0000 | [diff] [blame] | 703 | *fatsize = 16; |
| 704 | return 0; |
| 705 | } |
| 706 | } |
| 707 | |
| 708 | FAT_DPRINT("Error: broken fs_type sign\n"); |
| 709 | return -1; |
| 710 | } |
| 711 | |
Bryan Wu | 7e4b9b4 | 2009-01-02 20:47:45 -0500 | [diff] [blame] | 712 | __attribute__ ((__aligned__(__alignof__(dir_entry)))) |
| 713 | __u8 do_fat_read_block[MAX_CLUSTSIZE]; |
stroese | 20cc00d | 2004-12-16 17:57:26 +0000 | [diff] [blame] | 714 | long |
wdenk | 71f9511 | 2003-06-15 22:40:42 +0000 | [diff] [blame] | 715 | do_fat_read (const char *filename, void *buffer, unsigned long maxsize, |
| 716 | int dols) |
| 717 | { |
wdenk | 71f9511 | 2003-06-15 22:40:42 +0000 | [diff] [blame] | 718 | char fnamecopy[2048]; |
| 719 | boot_sector bs; |
| 720 | volume_info volinfo; |
| 721 | fsdata datablock; |
| 722 | fsdata *mydata = &datablock; |
| 723 | dir_entry *dentptr; |
| 724 | __u16 prevcksum = 0xffff; |
| 725 | char *subname = ""; |
Wolfgang Denk | 2aa98c6 | 2010-07-19 11:36:58 +0200 | [diff] [blame^] | 726 | int cursect; |
wdenk | 71f9511 | 2003-06-15 22:40:42 +0000 | [diff] [blame] | 727 | int idx, isdir = 0; |
| 728 | int files = 0, dirs = 0; |
| 729 | long ret = 0; |
| 730 | int firsttime; |
Wolfgang Denk | 2aa98c6 | 2010-07-19 11:36:58 +0200 | [diff] [blame^] | 731 | int root_cluster; |
| 732 | int j; |
wdenk | 71f9511 | 2003-06-15 22:40:42 +0000 | [diff] [blame] | 733 | |
| 734 | if (read_bootsectandvi (&bs, &volinfo, &mydata->fatsize)) { |
| 735 | FAT_DPRINT ("Error: reading boot sector\n"); |
| 736 | return -1; |
| 737 | } |
Wolfgang Denk | 2aa98c6 | 2010-07-19 11:36:58 +0200 | [diff] [blame^] | 738 | root_cluster = bs.root_cluster; |
wdenk | 71f9511 | 2003-06-15 22:40:42 +0000 | [diff] [blame] | 739 | if (mydata->fatsize == 32) { |
| 740 | mydata->fatlength = bs.fat32_length; |
| 741 | } else { |
| 742 | mydata->fatlength = bs.fat_length; |
| 743 | } |
| 744 | mydata->fat_sect = bs.reserved; |
| 745 | cursect = mydata->rootdir_sect |
| 746 | = mydata->fat_sect + mydata->fatlength * bs.fats; |
| 747 | mydata->clust_size = bs.cluster_size; |
| 748 | if (mydata->fatsize == 32) { |
Wolfgang Denk | 2aa98c6 | 2010-07-19 11:36:58 +0200 | [diff] [blame^] | 749 | mydata->data_begin = mydata->rootdir_sect |
wdenk | 71f9511 | 2003-06-15 22:40:42 +0000 | [diff] [blame] | 750 | - (mydata->clust_size * 2); |
| 751 | } else { |
Wolfgang Denk | 2aa98c6 | 2010-07-19 11:36:58 +0200 | [diff] [blame^] | 752 | int rootdir_size; |
| 753 | |
wdenk | 71f9511 | 2003-06-15 22:40:42 +0000 | [diff] [blame] | 754 | rootdir_size = ((bs.dir_entries[1] * (int) 256 + bs.dir_entries[0]) |
| 755 | * sizeof (dir_entry)) / SECTOR_SIZE; |
| 756 | mydata->data_begin = mydata->rootdir_sect + rootdir_size |
| 757 | - (mydata->clust_size * 2); |
| 758 | } |
| 759 | mydata->fatbufnum = -1; |
| 760 | |
Wolfgang Denk | 2aa98c6 | 2010-07-19 11:36:58 +0200 | [diff] [blame^] | 761 | #ifdef CONFIG_SUPPORT_VFAT |
| 762 | FAT_DPRINT ("VFAT Support enabled\n"); |
| 763 | #endif |
| 764 | FAT_DPRINT ("FAT%d, fat_sect: %d, fatlength: %d\n", |
| 765 | mydata->fatsize, |
| 766 | mydata->fat_sect, |
wdenk | 71f9511 | 2003-06-15 22:40:42 +0000 | [diff] [blame] | 767 | mydata->fatlength); |
Wolfgang Denk | 2aa98c6 | 2010-07-19 11:36:58 +0200 | [diff] [blame^] | 768 | FAT_DPRINT ("Rootdir begins at cluster: %d, sector: %d, offset: %x\n" |
wdenk | 71f9511 | 2003-06-15 22:40:42 +0000 | [diff] [blame] | 769 | "Data begins at: %d\n", |
Wolfgang Denk | 2aa98c6 | 2010-07-19 11:36:58 +0200 | [diff] [blame^] | 770 | root_cluster, |
| 771 | mydata->rootdir_sect, |
| 772 | mydata->rootdir_sect * SECTOR_SIZE, |
| 773 | mydata->data_begin); |
wdenk | 71f9511 | 2003-06-15 22:40:42 +0000 | [diff] [blame] | 774 | FAT_DPRINT ("Cluster size: %d\n", mydata->clust_size); |
| 775 | |
| 776 | /* "cwd" is always the root... */ |
| 777 | while (ISDIRDELIM (*filename)) |
| 778 | filename++; |
| 779 | /* Make a copy of the filename and convert it to lowercase */ |
| 780 | strcpy (fnamecopy, filename); |
| 781 | downcase (fnamecopy); |
| 782 | if (*fnamecopy == '\0') { |
| 783 | if (!dols) |
| 784 | return -1; |
| 785 | dols = LS_ROOT; |
| 786 | } else if ((idx = dirdelim (fnamecopy)) >= 0) { |
| 787 | isdir = 1; |
| 788 | fnamecopy[idx] = '\0'; |
| 789 | subname = fnamecopy + idx + 1; |
| 790 | /* Handle multiple delimiters */ |
| 791 | while (ISDIRDELIM (*subname)) |
| 792 | subname++; |
| 793 | } else if (dols) { |
| 794 | isdir = 1; |
| 795 | } |
| 796 | |
Wolfgang Denk | 2aa98c6 | 2010-07-19 11:36:58 +0200 | [diff] [blame^] | 797 | j=0; |
wdenk | 71f9511 | 2003-06-15 22:40:42 +0000 | [diff] [blame] | 798 | while (1) { |
| 799 | int i; |
| 800 | |
Wolfgang Denk | 2aa98c6 | 2010-07-19 11:36:58 +0200 | [diff] [blame^] | 801 | FAT_DPRINT ("FAT read sect=%d, clust_size=%d, DIRENTSPERBLOCK=%d\n", |
| 802 | cursect, mydata->clust_size, DIRENTSPERBLOCK); |
wdenk | 5fa66df | 2003-10-29 23:18:55 +0000 | [diff] [blame] | 803 | if (disk_read (cursect, mydata->clust_size, do_fat_read_block) < 0) { |
wdenk | 71f9511 | 2003-06-15 22:40:42 +0000 | [diff] [blame] | 804 | FAT_DPRINT ("Error: reading rootdir block\n"); |
| 805 | return -1; |
| 806 | } |
wdenk | 5fa66df | 2003-10-29 23:18:55 +0000 | [diff] [blame] | 807 | dentptr = (dir_entry *) do_fat_read_block; |
wdenk | 71f9511 | 2003-06-15 22:40:42 +0000 | [diff] [blame] | 808 | for (i = 0; i < DIRENTSPERBLOCK; i++) { |
| 809 | char s_name[14], l_name[256]; |
| 810 | |
| 811 | l_name[0] = '\0'; |
| 812 | if ((dentptr->attr & ATTR_VOLUME)) { |
| 813 | #ifdef CONFIG_SUPPORT_VFAT |
| 814 | if ((dentptr->attr & ATTR_VFAT) && |
wdenk | 2d1a537 | 2004-02-23 19:30:57 +0000 | [diff] [blame] | 815 | (dentptr->name[0] & LAST_LONG_ENTRY_MASK)) { |
wdenk | 71f9511 | 2003-06-15 22:40:42 +0000 | [diff] [blame] | 816 | prevcksum = ((dir_slot *) dentptr)->alias_checksum; |
wdenk | 5fa66df | 2003-10-29 23:18:55 +0000 | [diff] [blame] | 817 | get_vfatname (mydata, 0, do_fat_read_block, dentptr, l_name); |
wdenk | 71f9511 | 2003-06-15 22:40:42 +0000 | [diff] [blame] | 818 | if (dols == LS_ROOT) { |
| 819 | int isdir = (dentptr->attr & ATTR_DIR); |
| 820 | char dirc; |
| 821 | int doit = 0; |
| 822 | |
| 823 | if (isdir) { |
| 824 | dirs++; |
| 825 | dirc = '/'; |
| 826 | doit = 1; |
| 827 | } else { |
| 828 | dirc = ' '; |
| 829 | if (l_name[0] != 0) { |
| 830 | files++; |
| 831 | doit = 1; |
| 832 | } |
| 833 | } |
| 834 | if (doit) { |
| 835 | if (dirc == ' ') { |
| 836 | printf (" %8ld %s%c\n", |
| 837 | (long) FAT2CPU32 (dentptr->size), |
| 838 | l_name, dirc); |
| 839 | } else { |
| 840 | printf (" %s%c\n", l_name, dirc); |
| 841 | } |
| 842 | } |
| 843 | dentptr++; |
| 844 | continue; |
| 845 | } |
| 846 | FAT_DPRINT ("Rootvfatname: |%s|\n", l_name); |
| 847 | } else |
| 848 | #endif |
| 849 | { |
| 850 | /* Volume label or VFAT entry */ |
| 851 | dentptr++; |
| 852 | continue; |
| 853 | } |
| 854 | } else if (dentptr->name[0] == 0) { |
| 855 | FAT_DPRINT ("RootDentname == NULL - %d\n", i); |
| 856 | if (dols == LS_ROOT) { |
| 857 | printf ("\n%d file(s), %d dir(s)\n\n", files, dirs); |
| 858 | return 0; |
| 859 | } |
| 860 | return -1; |
| 861 | } |
| 862 | #ifdef CONFIG_SUPPORT_VFAT |
| 863 | else if (dols == LS_ROOT |
| 864 | && mkcksum (dentptr->name) == prevcksum) { |
| 865 | dentptr++; |
| 866 | continue; |
| 867 | } |
| 868 | #endif |
| 869 | get_name (dentptr, s_name); |
| 870 | if (dols == LS_ROOT) { |
| 871 | int isdir = (dentptr->attr & ATTR_DIR); |
| 872 | char dirc; |
| 873 | int doit = 0; |
| 874 | |
| 875 | if (isdir) { |
wdenk | 71f9511 | 2003-06-15 22:40:42 +0000 | [diff] [blame] | 876 | dirc = '/'; |
wdenk | a43278a | 2003-09-11 19:48:06 +0000 | [diff] [blame] | 877 | if (s_name[0] != 0) { |
| 878 | dirs++; |
| 879 | doit = 1; |
| 880 | } |
wdenk | 71f9511 | 2003-06-15 22:40:42 +0000 | [diff] [blame] | 881 | } else { |
| 882 | dirc = ' '; |
| 883 | if (s_name[0] != 0) { |
| 884 | files++; |
| 885 | doit = 1; |
| 886 | } |
| 887 | } |
| 888 | if (doit) { |
| 889 | if (dirc == ' ') { |
| 890 | printf (" %8ld %s%c\n", |
| 891 | (long) FAT2CPU32 (dentptr->size), s_name, |
| 892 | dirc); |
| 893 | } else { |
| 894 | printf (" %s%c\n", s_name, dirc); |
| 895 | } |
| 896 | } |
| 897 | dentptr++; |
| 898 | continue; |
| 899 | } |
| 900 | if (strcmp (fnamecopy, s_name) && strcmp (fnamecopy, l_name)) { |
| 901 | FAT_DPRINT ("RootMismatch: |%s|%s|\n", s_name, l_name); |
| 902 | dentptr++; |
| 903 | continue; |
| 904 | } |
| 905 | if (isdir && !(dentptr->attr & ATTR_DIR)) |
| 906 | return -1; |
| 907 | |
| 908 | FAT_DPRINT ("RootName: %s", s_name); |
| 909 | FAT_DPRINT (", start: 0x%x", START (dentptr)); |
| 910 | FAT_DPRINT (", size: 0x%x %s\n", |
| 911 | FAT2CPU32 (dentptr->size), isdir ? "(DIR)" : ""); |
| 912 | |
| 913 | goto rootdir_done; /* We got a match */ |
| 914 | } |
Wolfgang Denk | 2aa98c6 | 2010-07-19 11:36:58 +0200 | [diff] [blame^] | 915 | FAT_DPRINT ("END LOOP: j=%d clust_size=%d\n", j, mydata->clust_size); |
| 916 | |
| 917 | /* |
| 918 | * On FAT32 we must fetch the FAT entries for the next |
| 919 | * root directory clusters when a cluster has been |
| 920 | * completely processed. |
| 921 | */ |
| 922 | if ((mydata->fatsize == 32) && (++j == mydata->clust_size)) { |
| 923 | int nxtsect; |
| 924 | int cur_clust, nxt_clust; |
| 925 | |
| 926 | cur_clust = (cursect - mydata->data_begin) / mydata->clust_size; |
| 927 | nxt_clust = get_fatent(mydata, root_cluster); |
| 928 | nxtsect = mydata->data_begin + (nxt_clust * mydata->clust_size); |
| 929 | FAT_DPRINT ("END LOOP: sect=%d, clust=%d, root_clust=%d, n_sect=%d, n_clust=%d\n", |
| 930 | cursect, cur_clust, root_cluster, nxtsect, nxt_clust); |
| 931 | root_cluster = nxt_clust; |
| 932 | |
| 933 | cursect = nxtsect; |
| 934 | j = 0; |
| 935 | } else { |
| 936 | cursect++; |
| 937 | } |
wdenk | 71f9511 | 2003-06-15 22:40:42 +0000 | [diff] [blame] | 938 | } |
| 939 | rootdir_done: |
| 940 | |
| 941 | firsttime = 1; |
| 942 | while (isdir) { |
| 943 | int startsect = mydata->data_begin |
| 944 | + START (dentptr) * mydata->clust_size; |
| 945 | dir_entry dent; |
| 946 | char *nextname = NULL; |
| 947 | |
| 948 | dent = *dentptr; |
| 949 | dentptr = &dent; |
| 950 | |
| 951 | idx = dirdelim (subname); |
| 952 | if (idx >= 0) { |
| 953 | subname[idx] = '\0'; |
| 954 | nextname = subname + idx + 1; |
| 955 | /* Handle multiple delimiters */ |
| 956 | while (ISDIRDELIM (*nextname)) |
| 957 | nextname++; |
| 958 | if (dols && *nextname == '\0') |
| 959 | firsttime = 0; |
| 960 | } else { |
| 961 | if (dols && firsttime) { |
| 962 | firsttime = 0; |
| 963 | } else { |
| 964 | isdir = 0; |
| 965 | } |
| 966 | } |
| 967 | |
| 968 | if (get_dentfromdir (mydata, startsect, subname, dentptr, |
| 969 | isdir ? 0 : dols) == NULL) { |
| 970 | if (dols && !isdir) |
| 971 | return 0; |
| 972 | return -1; |
| 973 | } |
| 974 | |
| 975 | if (idx >= 0) { |
| 976 | if (!(dentptr->attr & ATTR_DIR)) |
| 977 | return -1; |
| 978 | subname = nextname; |
| 979 | } |
| 980 | } |
| 981 | ret = get_contents (mydata, dentptr, buffer, maxsize); |
| 982 | FAT_DPRINT ("Size: %d, got: %ld\n", FAT2CPU32 (dentptr->size), ret); |
| 983 | |
| 984 | return ret; |
| 985 | } |
| 986 | |
| 987 | |
| 988 | int |
| 989 | file_fat_detectfs(void) |
| 990 | { |
| 991 | boot_sector bs; |
| 992 | volume_info volinfo; |
| 993 | int fatsize; |
wdenk | 7205e40 | 2003-09-10 22:30:53 +0000 | [diff] [blame] | 994 | char vol_label[12]; |
wdenk | 71f9511 | 2003-06-15 22:40:42 +0000 | [diff] [blame] | 995 | |
wdenk | 7205e40 | 2003-09-10 22:30:53 +0000 | [diff] [blame] | 996 | if(cur_dev==NULL) { |
| 997 | printf("No current device\n"); |
| 998 | return 1; |
| 999 | } |
Jon Loeliger | dd60d12 | 2007-07-09 17:56:50 -0500 | [diff] [blame] | 1000 | #if defined(CONFIG_CMD_IDE) || \ |
unsik Kim | 75eb82e | 2009-02-25 11:31:24 +0900 | [diff] [blame] | 1001 | defined(CONFIG_CMD_MG_DISK) || \ |
Sonic Zhang | 8c5170a | 2008-12-09 23:20:18 -0500 | [diff] [blame] | 1002 | defined(CONFIG_CMD_SATA) || \ |
Jon Loeliger | dd60d12 | 2007-07-09 17:56:50 -0500 | [diff] [blame] | 1003 | defined(CONFIG_CMD_SCSI) || \ |
| 1004 | defined(CONFIG_CMD_USB) || \ |
Andy Fleming | 21f6f96 | 2008-01-16 13:06:59 -0600 | [diff] [blame] | 1005 | defined(CONFIG_MMC) |
wdenk | 7205e40 | 2003-09-10 22:30:53 +0000 | [diff] [blame] | 1006 | printf("Interface: "); |
| 1007 | switch(cur_dev->if_type) { |
| 1008 | case IF_TYPE_IDE : printf("IDE"); break; |
Sonic Zhang | 8c5170a | 2008-12-09 23:20:18 -0500 | [diff] [blame] | 1009 | case IF_TYPE_SATA : printf("SATA"); break; |
wdenk | 7205e40 | 2003-09-10 22:30:53 +0000 | [diff] [blame] | 1010 | case IF_TYPE_SCSI : printf("SCSI"); break; |
| 1011 | case IF_TYPE_ATAPI : printf("ATAPI"); break; |
| 1012 | case IF_TYPE_USB : printf("USB"); break; |
| 1013 | case IF_TYPE_DOC : printf("DOC"); break; |
| 1014 | case IF_TYPE_MMC : printf("MMC"); break; |
| 1015 | default : printf("Unknown"); |
| 1016 | } |
| 1017 | printf("\n Device %d: ",cur_dev->dev); |
| 1018 | dev_print(cur_dev); |
| 1019 | #endif |
| 1020 | if(read_bootsectandvi(&bs, &volinfo, &fatsize)) { |
| 1021 | printf("\nNo valid FAT fs found\n"); |
| 1022 | return 1; |
| 1023 | } |
| 1024 | memcpy (vol_label, volinfo.volume_label, 11); |
| 1025 | vol_label[11] = '\0'; |
| 1026 | volinfo.fs_type[5]='\0'; |
Peter Pearse | 3e3b956 | 2007-05-18 16:47:03 +0100 | [diff] [blame] | 1027 | printf("Partition %d: Filesystem: %s \"%s\"\n" |
| 1028 | ,cur_part,volinfo.fs_type,vol_label); |
wdenk | 7205e40 | 2003-09-10 22:30:53 +0000 | [diff] [blame] | 1029 | return 0; |
wdenk | 71f9511 | 2003-06-15 22:40:42 +0000 | [diff] [blame] | 1030 | } |
| 1031 | |
| 1032 | |
| 1033 | int |
| 1034 | file_fat_ls(const char *dir) |
| 1035 | { |
| 1036 | return do_fat_read(dir, NULL, 0, LS_YES); |
| 1037 | } |
| 1038 | |
| 1039 | |
| 1040 | long |
| 1041 | file_fat_read(const char *filename, void *buffer, unsigned long maxsize) |
| 1042 | { |
wdenk | 7205e40 | 2003-09-10 22:30:53 +0000 | [diff] [blame] | 1043 | printf("reading %s\n",filename); |
wdenk | 71f9511 | 2003-06-15 22:40:42 +0000 | [diff] [blame] | 1044 | return do_fat_read(filename, buffer, maxsize, LS_NO); |
| 1045 | } |