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Commit | Line | Data |
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71f95118 WD |
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> | |
ac497771 | 30 | #include <exports.h> |
71f95118 WD |
31 | #include <fat.h> |
32 | #include <asm/byteorder.h> | |
7205e407 | 33 | #include <part.h> |
9a800ac7 EN |
34 | #include <malloc.h> |
35 | #include <linux/compiler.h> | |
71f95118 | 36 | |
71f95118 WD |
37 | /* |
38 | * Convert a string to lowercase. | |
39 | */ | |
9795e07b | 40 | static void downcase(char *str) |
71f95118 WD |
41 | { |
42 | while (*str != '\0') { | |
43 | TOLOWER(*str); | |
44 | str++; | |
45 | } | |
46 | } | |
47 | ||
9813b750 | 48 | static block_dev_desc_t *cur_dev; |
9813b750 | 49 | static disk_partition_t cur_part_info; |
7385c28e | 50 | |
9813b750 | 51 | #define DOS_BOOT_MAGIC_OFFSET 0x1fe |
7205e407 | 52 | #define DOS_FS_TYPE_OFFSET 0x36 |
66c2d73c | 53 | #define DOS_FS32_TYPE_OFFSET 0x52 |
71f95118 | 54 | |
9813b750 | 55 | static int disk_read(__u32 block, __u32 nr_blocks, void *buf) |
71f95118 | 56 | { |
9813b750 | 57 | if (!cur_dev || !cur_dev->block_read) |
7205e407 | 58 | return -1; |
7385c28e | 59 | |
9813b750 KM |
60 | return cur_dev->block_read(cur_dev->dev, |
61 | cur_part_info.start + block, nr_blocks, buf); | |
71f95118 WD |
62 | } |
63 | ||
5e8f9831 | 64 | int fat_set_blk_dev(block_dev_desc_t *dev_desc, disk_partition_t *info) |
71f95118 | 65 | { |
9a800ac7 | 66 | ALLOC_CACHE_ALIGN_BUFFER(unsigned char, buffer, dev_desc->blksz); |
7205e407 | 67 | |
5e8f9831 SW |
68 | cur_dev = dev_desc; |
69 | cur_part_info = *info; | |
9813b750 KM |
70 | |
71 | /* Make sure it has a valid FAT header */ | |
72 | if (disk_read(0, 1, buffer) != 1) { | |
73 | cur_dev = NULL; | |
74 | return -1; | |
bf1060ea | 75 | } |
9813b750 KM |
76 | |
77 | /* Check if it's actually a DOS volume */ | |
78 | if (memcmp(buffer + DOS_BOOT_MAGIC_OFFSET, "\x55\xAA", 2)) { | |
79 | cur_dev = NULL; | |
80 | return -1; | |
81 | } | |
82 | ||
83 | /* Check for FAT12/FAT16/FAT32 filesystem */ | |
84 | if (!memcmp(buffer + DOS_FS_TYPE_OFFSET, "FAT", 3)) | |
85 | return 0; | |
86 | if (!memcmp(buffer + DOS_FS32_TYPE_OFFSET, "FAT32", 5)) | |
87 | return 0; | |
88 | ||
89 | cur_dev = NULL; | |
90 | return -1; | |
71f95118 WD |
91 | } |
92 | ||
5e8f9831 SW |
93 | int fat_register_device(block_dev_desc_t *dev_desc, int part_no) |
94 | { | |
95 | disk_partition_t info; | |
96 | ||
97 | /* First close any currently found FAT filesystem */ | |
98 | cur_dev = NULL; | |
99 | ||
100 | /* Read the partition table, if present */ | |
101 | if (get_partition_info(dev_desc, part_no, &info)) { | |
102 | if (part_no != 0) { | |
103 | printf("** Partition %d not valid on device %d **\n", | |
104 | part_no, dev_desc->dev); | |
105 | return -1; | |
106 | } | |
107 | ||
108 | info.start = 0; | |
109 | info.size = dev_desc->lba; | |
110 | info.blksz = dev_desc->blksz; | |
111 | info.name[0] = 0; | |
112 | info.type[0] = 0; | |
113 | info.bootable = 0; | |
114 | #ifdef CONFIG_PARTITION_UUIDS | |
115 | info.uuid[0] = 0; | |
116 | #endif | |
117 | } | |
118 | ||
119 | return fat_set_blk_dev(dev_desc, &info); | |
120 | } | |
9813b750 | 121 | |
71f95118 WD |
122 | /* |
123 | * Get the first occurence of a directory delimiter ('/' or '\') in a string. | |
124 | * Return index into string if found, -1 otherwise. | |
125 | */ | |
9795e07b | 126 | static int dirdelim(char *str) |
71f95118 WD |
127 | { |
128 | char *start = str; | |
129 | ||
130 | while (*str != '\0') { | |
7385c28e WD |
131 | if (ISDIRDELIM(*str)) |
132 | return str - start; | |
71f95118 WD |
133 | str++; |
134 | } | |
135 | return -1; | |
136 | } | |
137 | ||
71f95118 WD |
138 | /* |
139 | * Extract zero terminated short name from a directory entry. | |
140 | */ | |
9795e07b | 141 | static void get_name(dir_entry *dirent, char *s_name) |
71f95118 WD |
142 | { |
143 | char *ptr; | |
144 | ||
7385c28e | 145 | memcpy(s_name, dirent->name, 8); |
71f95118 WD |
146 | s_name[8] = '\0'; |
147 | ptr = s_name; | |
148 | while (*ptr && *ptr != ' ') | |
149 | ptr++; | |
150 | if (dirent->ext[0] && dirent->ext[0] != ' ') { | |
151 | *ptr = '.'; | |
152 | ptr++; | |
7385c28e | 153 | memcpy(ptr, dirent->ext, 3); |
71f95118 WD |
154 | ptr[3] = '\0'; |
155 | while (*ptr && *ptr != ' ') | |
156 | ptr++; | |
157 | } | |
158 | *ptr = '\0'; | |
159 | if (*s_name == DELETED_FLAG) | |
160 | *s_name = '\0'; | |
161 | else if (*s_name == aRING) | |
3c2c2f42 | 162 | *s_name = DELETED_FLAG; |
7385c28e | 163 | downcase(s_name); |
71f95118 WD |
164 | } |
165 | ||
166 | /* | |
167 | * Get the entry at index 'entry' in a FAT (12/16/32) table. | |
168 | * On failure 0x00 is returned. | |
169 | */ | |
9795e07b | 170 | static __u32 get_fatent(fsdata *mydata, __u32 entry) |
71f95118 WD |
171 | { |
172 | __u32 bufnum; | |
7385c28e | 173 | __u32 off16, offset; |
71f95118 | 174 | __u32 ret = 0x00; |
7385c28e | 175 | __u16 val1, val2; |
71f95118 WD |
176 | |
177 | switch (mydata->fatsize) { | |
178 | case 32: | |
179 | bufnum = entry / FAT32BUFSIZE; | |
180 | offset = entry - bufnum * FAT32BUFSIZE; | |
181 | break; | |
182 | case 16: | |
183 | bufnum = entry / FAT16BUFSIZE; | |
184 | offset = entry - bufnum * FAT16BUFSIZE; | |
185 | break; | |
186 | case 12: | |
187 | bufnum = entry / FAT12BUFSIZE; | |
188 | offset = entry - bufnum * FAT12BUFSIZE; | |
189 | break; | |
190 | ||
191 | default: | |
192 | /* Unsupported FAT size */ | |
193 | return ret; | |
194 | } | |
195 | ||
7385c28e WD |
196 | debug("FAT%d: entry: 0x%04x = %d, offset: 0x%04x = %d\n", |
197 | mydata->fatsize, entry, entry, offset, offset); | |
2aa98c66 | 198 | |
71f95118 WD |
199 | /* Read a new block of FAT entries into the cache. */ |
200 | if (bufnum != mydata->fatbufnum) { | |
60b36f0f | 201 | __u32 getsize = FATBUFBLOCKS; |
71f95118 WD |
202 | __u8 *bufptr = mydata->fatbuf; |
203 | __u32 fatlength = mydata->fatlength; | |
204 | __u32 startblock = bufnum * FATBUFBLOCKS; | |
205 | ||
8006dd2e BT |
206 | if (startblock + getsize > fatlength) |
207 | getsize = fatlength - startblock; | |
60b36f0f | 208 | |
71f95118 WD |
209 | startblock += mydata->fat_sect; /* Offset from start of disk */ |
210 | ||
71f95118 | 211 | if (disk_read(startblock, getsize, bufptr) < 0) { |
7385c28e | 212 | debug("Error reading FAT blocks\n"); |
71f95118 WD |
213 | return ret; |
214 | } | |
215 | mydata->fatbufnum = bufnum; | |
216 | } | |
217 | ||
218 | /* Get the actual entry from the table */ | |
219 | switch (mydata->fatsize) { | |
220 | case 32: | |
7385c28e | 221 | ret = FAT2CPU32(((__u32 *) mydata->fatbuf)[offset]); |
71f95118 WD |
222 | break; |
223 | case 16: | |
7385c28e | 224 | ret = FAT2CPU16(((__u16 *) mydata->fatbuf)[offset]); |
71f95118 | 225 | break; |
7385c28e WD |
226 | case 12: |
227 | off16 = (offset * 3) / 4; | |
71f95118 WD |
228 | |
229 | switch (offset & 0x3) { | |
230 | case 0: | |
7385c28e | 231 | ret = FAT2CPU16(((__u16 *) mydata->fatbuf)[off16]); |
71f95118 WD |
232 | ret &= 0xfff; |
233 | break; | |
234 | case 1: | |
7385c28e | 235 | val1 = FAT2CPU16(((__u16 *)mydata->fatbuf)[off16]); |
71f95118 | 236 | val1 &= 0xf000; |
7385c28e | 237 | val2 = FAT2CPU16(((__u16 *)mydata->fatbuf)[off16 + 1]); |
71f95118 WD |
238 | val2 &= 0x00ff; |
239 | ret = (val2 << 4) | (val1 >> 12); | |
240 | break; | |
241 | case 2: | |
7385c28e | 242 | val1 = FAT2CPU16(((__u16 *)mydata->fatbuf)[off16]); |
71f95118 | 243 | val1 &= 0xff00; |
7385c28e | 244 | val2 = FAT2CPU16(((__u16 *)mydata->fatbuf)[off16 + 1]); |
71f95118 WD |
245 | val2 &= 0x000f; |
246 | ret = (val2 << 8) | (val1 >> 8); | |
247 | break; | |
248 | case 3: | |
7385c28e | 249 | ret = FAT2CPU16(((__u16 *)mydata->fatbuf)[off16]); |
71f95118 WD |
250 | ret = (ret & 0xfff0) >> 4; |
251 | break; | |
252 | default: | |
253 | break; | |
254 | } | |
7385c28e | 255 | break; |
71f95118 | 256 | } |
7385c28e WD |
257 | debug("FAT%d: ret: %08x, offset: %04x\n", |
258 | mydata->fatsize, ret, offset); | |
71f95118 WD |
259 | |
260 | return ret; | |
261 | } | |
262 | ||
71f95118 WD |
263 | /* |
264 | * Read at most 'size' bytes from the specified cluster into 'buffer'. | |
265 | * Return 0 on success, -1 otherwise. | |
266 | */ | |
267 | static int | |
9795e07b | 268 | get_cluster(fsdata *mydata, __u32 clustnum, __u8 *buffer, unsigned long size) |
71f95118 | 269 | { |
3f270f42 | 270 | __u32 idx = 0; |
71f95118 | 271 | __u32 startsect; |
46236b14 | 272 | int ret; |
71f95118 WD |
273 | |
274 | if (clustnum > 0) { | |
7385c28e WD |
275 | startsect = mydata->data_begin + |
276 | clustnum * mydata->clust_size; | |
71f95118 WD |
277 | } else { |
278 | startsect = mydata->rootdir_sect; | |
279 | } | |
280 | ||
7385c28e WD |
281 | debug("gc - clustnum: %d, startsect: %d\n", clustnum, startsect); |
282 | ||
cc63b25e | 283 | if ((unsigned long)buffer & (ARCH_DMA_MINALIGN - 1)) { |
9a800ac7 | 284 | ALLOC_CACHE_ALIGN_BUFFER(__u8, tmpbuf, mydata->sect_size); |
7385c28e | 285 | |
cc63b25e BT |
286 | printf("FAT: Misaligned buffer address (%p)\n", buffer); |
287 | ||
288 | while (size >= mydata->sect_size) { | |
289 | ret = disk_read(startsect++, 1, tmpbuf); | |
290 | if (ret != 1) { | |
291 | debug("Error reading data (got %d)\n", ret); | |
292 | return -1; | |
293 | } | |
294 | ||
295 | memcpy(buffer, tmpbuf, mydata->sect_size); | |
296 | buffer += mydata->sect_size; | |
297 | size -= mydata->sect_size; | |
298 | } | |
299 | } else { | |
ac497771 | 300 | idx = size / mydata->sect_size; |
cc63b25e BT |
301 | ret = disk_read(startsect, idx, buffer); |
302 | if (ret != idx) { | |
303 | debug("Error reading data (got %d)\n", ret); | |
304 | return -1; | |
305 | } | |
306 | startsect += idx; | |
307 | idx *= mydata->sect_size; | |
308 | buffer += idx; | |
309 | size -= idx; | |
310 | } | |
311 | if (size) { | |
312 | ALLOC_CACHE_ALIGN_BUFFER(__u8, tmpbuf, mydata->sect_size); | |
313 | ||
314 | ret = disk_read(startsect, 1, tmpbuf); | |
46236b14 KM |
315 | if (ret != 1) { |
316 | debug("Error reading data (got %d)\n", ret); | |
7205e407 | 317 | return -1; |
71f95118 | 318 | } |
7205e407 | 319 | |
cc63b25e | 320 | memcpy(buffer, tmpbuf, size); |
71f95118 WD |
321 | } |
322 | ||
323 | return 0; | |
324 | } | |
325 | ||
71f95118 | 326 | /* |
1170e634 | 327 | * Read at most 'maxsize' bytes from 'pos' in the file associated with 'dentptr' |
71f95118 WD |
328 | * into 'buffer'. |
329 | * Return the number of bytes read or -1 on fatal errors. | |
330 | */ | |
1170e634 BT |
331 | __u8 get_contents_vfatname_block[MAX_CLUSTSIZE] |
332 | __aligned(ARCH_DMA_MINALIGN); | |
333 | ||
71f95118 | 334 | static long |
1170e634 BT |
335 | get_contents(fsdata *mydata, dir_entry *dentptr, unsigned long pos, |
336 | __u8 *buffer, unsigned long maxsize) | |
71f95118 WD |
337 | { |
338 | unsigned long filesize = FAT2CPU32(dentptr->size), gotsize = 0; | |
ac497771 | 339 | unsigned int bytesperclust = mydata->clust_size * mydata->sect_size; |
71f95118 | 340 | __u32 curclust = START(dentptr); |
7205e407 WD |
341 | __u32 endclust, newclust; |
342 | unsigned long actsize; | |
71f95118 | 343 | |
7385c28e | 344 | debug("Filesize: %ld bytes\n", filesize); |
71f95118 | 345 | |
1170e634 BT |
346 | if (pos >= filesize) { |
347 | debug("Read position past EOF: %lu\n", pos); | |
348 | return gotsize; | |
349 | } | |
350 | ||
351 | if (maxsize > 0 && filesize > pos + maxsize) | |
352 | filesize = pos + maxsize; | |
71f95118 | 353 | |
7385c28e WD |
354 | debug("%ld bytes\n", filesize); |
355 | ||
1170e634 BT |
356 | actsize = bytesperclust; |
357 | ||
358 | /* go to cluster at pos */ | |
359 | while (actsize <= pos) { | |
360 | curclust = get_fatent(mydata, curclust); | |
361 | if (CHECK_CLUST(curclust, mydata->fatsize)) { | |
362 | debug("curclust: 0x%x\n", curclust); | |
363 | debug("Invalid FAT entry\n"); | |
364 | return gotsize; | |
365 | } | |
366 | actsize += bytesperclust; | |
367 | } | |
368 | ||
369 | /* actsize > pos */ | |
370 | actsize -= bytesperclust; | |
371 | filesize -= actsize; | |
372 | pos -= actsize; | |
373 | ||
374 | /* align to beginning of next cluster if any */ | |
375 | if (pos) { | |
376 | actsize = min(filesize, bytesperclust); | |
377 | if (get_cluster(mydata, curclust, get_contents_vfatname_block, | |
378 | (int)actsize) != 0) { | |
379 | printf("Error reading cluster\n"); | |
380 | return -1; | |
381 | } | |
382 | filesize -= actsize; | |
383 | actsize -= pos; | |
384 | memcpy(buffer, get_contents_vfatname_block + pos, actsize); | |
385 | gotsize += actsize; | |
386 | if (!filesize) | |
387 | return gotsize; | |
388 | buffer += actsize; | |
389 | ||
390 | curclust = get_fatent(mydata, curclust); | |
391 | if (CHECK_CLUST(curclust, mydata->fatsize)) { | |
392 | debug("curclust: 0x%x\n", curclust); | |
393 | debug("Invalid FAT entry\n"); | |
394 | return gotsize; | |
395 | } | |
396 | } | |
397 | ||
7385c28e WD |
398 | actsize = bytesperclust; |
399 | endclust = curclust; | |
71f95118 WD |
400 | |
401 | do { | |
7205e407 | 402 | /* search for consecutive clusters */ |
7385c28e | 403 | while (actsize < filesize) { |
7205e407 | 404 | newclust = get_fatent(mydata, endclust); |
7385c28e | 405 | if ((newclust - 1) != endclust) |
7205e407 | 406 | goto getit; |
8ce4e5c2 | 407 | if (CHECK_CLUST(newclust, mydata->fatsize)) { |
7385c28e WD |
408 | debug("curclust: 0x%x\n", newclust); |
409 | debug("Invalid FAT entry\n"); | |
7205e407 WD |
410 | return gotsize; |
411 | } | |
7385c28e WD |
412 | endclust = newclust; |
413 | actsize += bytesperclust; | |
7205e407 | 414 | } |
7385c28e | 415 | |
7205e407 | 416 | /* get remaining bytes */ |
7385c28e | 417 | actsize = filesize; |
0880e5bb | 418 | if (get_cluster(mydata, curclust, buffer, (int)actsize) != 0) { |
7385c28e | 419 | printf("Error reading cluster\n"); |
7205e407 WD |
420 | return -1; |
421 | } | |
7385c28e | 422 | gotsize += actsize; |
7205e407 WD |
423 | return gotsize; |
424 | getit: | |
425 | if (get_cluster(mydata, curclust, buffer, (int)actsize) != 0) { | |
7385c28e | 426 | printf("Error reading cluster\n"); |
7205e407 WD |
427 | return -1; |
428 | } | |
429 | gotsize += (int)actsize; | |
430 | filesize -= actsize; | |
431 | buffer += actsize; | |
7385c28e | 432 | |
7205e407 | 433 | curclust = get_fatent(mydata, endclust); |
8ce4e5c2 | 434 | if (CHECK_CLUST(curclust, mydata->fatsize)) { |
7385c28e WD |
435 | debug("curclust: 0x%x\n", curclust); |
436 | printf("Invalid FAT entry\n"); | |
71f95118 WD |
437 | return gotsize; |
438 | } | |
7385c28e WD |
439 | actsize = bytesperclust; |
440 | endclust = curclust; | |
71f95118 WD |
441 | } while (1); |
442 | } | |
443 | ||
71f95118 WD |
444 | #ifdef CONFIG_SUPPORT_VFAT |
445 | /* | |
446 | * Extract the file name information from 'slotptr' into 'l_name', | |
447 | * starting at l_name[*idx]. | |
448 | * Return 1 if terminator (zero byte) is found, 0 otherwise. | |
449 | */ | |
9795e07b | 450 | static int slot2str(dir_slot *slotptr, char *l_name, int *idx) |
71f95118 WD |
451 | { |
452 | int j; | |
453 | ||
454 | for (j = 0; j <= 8; j += 2) { | |
455 | l_name[*idx] = slotptr->name0_4[j]; | |
7385c28e WD |
456 | if (l_name[*idx] == 0x00) |
457 | return 1; | |
71f95118 WD |
458 | (*idx)++; |
459 | } | |
460 | for (j = 0; j <= 10; j += 2) { | |
461 | l_name[*idx] = slotptr->name5_10[j]; | |
7385c28e WD |
462 | if (l_name[*idx] == 0x00) |
463 | return 1; | |
71f95118 WD |
464 | (*idx)++; |
465 | } | |
466 | for (j = 0; j <= 2; j += 2) { | |
467 | l_name[*idx] = slotptr->name11_12[j]; | |
7385c28e WD |
468 | if (l_name[*idx] == 0x00) |
469 | return 1; | |
71f95118 WD |
470 | (*idx)++; |
471 | } | |
472 | ||
473 | return 0; | |
474 | } | |
475 | ||
71f95118 WD |
476 | /* |
477 | * Extract the full long filename starting at 'retdent' (which is really | |
478 | * a slot) into 'l_name'. If successful also copy the real directory entry | |
479 | * into 'retdent' | |
480 | * Return 0 on success, -1 otherwise. | |
481 | */ | |
482 | static int | |
9795e07b BT |
483 | get_vfatname(fsdata *mydata, int curclust, __u8 *cluster, |
484 | dir_entry *retdent, char *l_name) | |
71f95118 WD |
485 | { |
486 | dir_entry *realdent; | |
7385c28e | 487 | dir_slot *slotptr = (dir_slot *)retdent; |
025421ea SS |
488 | __u8 *buflimit = cluster + mydata->sect_size * ((curclust == 0) ? |
489 | PREFETCH_BLOCKS : | |
490 | mydata->clust_size); | |
7385c28e | 491 | __u8 counter = (slotptr->id & ~LAST_LONG_ENTRY_MASK) & 0xff; |
71f95118 WD |
492 | int idx = 0; |
493 | ||
3831530d MZ |
494 | if (counter > VFAT_MAXSEQ) { |
495 | debug("Error: VFAT name is too long\n"); | |
496 | return -1; | |
497 | } | |
498 | ||
499 | while ((__u8 *)slotptr < buflimit) { | |
7385c28e WD |
500 | if (counter == 0) |
501 | break; | |
2d1a537d WD |
502 | if (((slotptr->id & ~LAST_LONG_ENTRY_MASK) & 0xff) != counter) |
503 | return -1; | |
71f95118 WD |
504 | slotptr++; |
505 | counter--; | |
506 | } | |
507 | ||
3831530d | 508 | if ((__u8 *)slotptr >= buflimit) { |
71f95118 WD |
509 | dir_slot *slotptr2; |
510 | ||
3831530d MZ |
511 | if (curclust == 0) |
512 | return -1; | |
71f95118 | 513 | curclust = get_fatent(mydata, curclust); |
8ce4e5c2 | 514 | if (CHECK_CLUST(curclust, mydata->fatsize)) { |
7385c28e WD |
515 | debug("curclust: 0x%x\n", curclust); |
516 | printf("Invalid FAT entry\n"); | |
71f95118 WD |
517 | return -1; |
518 | } | |
7385c28e | 519 | |
1170e634 | 520 | if (get_cluster(mydata, curclust, get_contents_vfatname_block, |
ac497771 | 521 | mydata->clust_size * mydata->sect_size) != 0) { |
7385c28e | 522 | debug("Error: reading directory block\n"); |
71f95118 WD |
523 | return -1; |
524 | } | |
7385c28e | 525 | |
1170e634 | 526 | slotptr2 = (dir_slot *)get_contents_vfatname_block; |
3831530d MZ |
527 | while (counter > 0) { |
528 | if (((slotptr2->id & ~LAST_LONG_ENTRY_MASK) | |
529 | & 0xff) != counter) | |
530 | return -1; | |
71f95118 | 531 | slotptr2++; |
3831530d MZ |
532 | counter--; |
533 | } | |
7385c28e | 534 | |
71f95118 | 535 | /* Save the real directory entry */ |
3831530d | 536 | realdent = (dir_entry *)slotptr2; |
1170e634 | 537 | while ((__u8 *)slotptr2 > get_contents_vfatname_block) { |
71f95118 | 538 | slotptr2--; |
3831530d | 539 | slot2str(slotptr2, l_name, &idx); |
71f95118 WD |
540 | } |
541 | } else { | |
542 | /* Save the real directory entry */ | |
7385c28e | 543 | realdent = (dir_entry *)slotptr; |
71f95118 WD |
544 | } |
545 | ||
546 | do { | |
547 | slotptr--; | |
7385c28e WD |
548 | if (slot2str(slotptr, l_name, &idx)) |
549 | break; | |
2d1a537d | 550 | } while (!(slotptr->id & LAST_LONG_ENTRY_MASK)); |
71f95118 WD |
551 | |
552 | l_name[idx] = '\0'; | |
7385c28e WD |
553 | if (*l_name == DELETED_FLAG) |
554 | *l_name = '\0'; | |
555 | else if (*l_name == aRING) | |
556 | *l_name = DELETED_FLAG; | |
71f95118 WD |
557 | downcase(l_name); |
558 | ||
559 | /* Return the real directory entry */ | |
560 | memcpy(retdent, realdent, sizeof(dir_entry)); | |
561 | ||
562 | return 0; | |
563 | } | |
564 | ||
71f95118 | 565 | /* Calculate short name checksum */ |
ff04f6d1 | 566 | static __u8 mkcksum(const char name[8], const char ext[3]) |
71f95118 WD |
567 | { |
568 | int i; | |
7385c28e | 569 | |
71f95118 WD |
570 | __u8 ret = 0; |
571 | ||
6ad77d88 | 572 | for (i = 0; i < 8; i++) |
ff04f6d1 | 573 | ret = (((ret & 1) << 7) | ((ret & 0xfe) >> 1)) + name[i]; |
6ad77d88 | 574 | for (i = 0; i < 3; i++) |
ff04f6d1 | 575 | ret = (((ret & 1) << 7) | ((ret & 0xfe) >> 1)) + ext[i]; |
71f95118 WD |
576 | |
577 | return ret; | |
578 | } | |
7385c28e | 579 | #endif /* CONFIG_SUPPORT_VFAT */ |
71f95118 WD |
580 | |
581 | /* | |
582 | * Get the directory entry associated with 'filename' from the directory | |
583 | * starting at 'startsect' | |
584 | */ | |
9a800ac7 EN |
585 | __u8 get_dentfromdir_block[MAX_CLUSTSIZE] |
586 | __aligned(ARCH_DMA_MINALIGN); | |
7385c28e | 587 | |
9795e07b BT |
588 | static dir_entry *get_dentfromdir(fsdata *mydata, int startsect, |
589 | char *filename, dir_entry *retdent, | |
590 | int dols) | |
71f95118 | 591 | { |
7385c28e WD |
592 | __u16 prevcksum = 0xffff; |
593 | __u32 curclust = START(retdent); | |
594 | int files = 0, dirs = 0; | |
71f95118 | 595 | |
7385c28e | 596 | debug("get_dentfromdir: %s\n", filename); |
71f95118 | 597 | |
7385c28e WD |
598 | while (1) { |
599 | dir_entry *dentptr; | |
600 | ||
601 | int i; | |
602 | ||
603 | if (get_cluster(mydata, curclust, get_dentfromdir_block, | |
ac497771 | 604 | mydata->clust_size * mydata->sect_size) != 0) { |
7385c28e WD |
605 | debug("Error: reading directory block\n"); |
606 | return NULL; | |
607 | } | |
608 | ||
609 | dentptr = (dir_entry *)get_dentfromdir_block; | |
610 | ||
611 | for (i = 0; i < DIRENTSPERCLUST; i++) { | |
3831530d | 612 | char s_name[14], l_name[VFAT_MAXLEN_BYTES]; |
7385c28e WD |
613 | |
614 | l_name[0] = '\0'; | |
615 | if (dentptr->name[0] == DELETED_FLAG) { | |
616 | dentptr++; | |
617 | continue; | |
618 | } | |
619 | if ((dentptr->attr & ATTR_VOLUME)) { | |
71f95118 | 620 | #ifdef CONFIG_SUPPORT_VFAT |
206d68fd V |
621 | if ((dentptr->attr & ATTR_VFAT) == ATTR_VFAT && |
622 | (dentptr->name[0] & LAST_LONG_ENTRY_MASK)) { | |
7385c28e WD |
623 | prevcksum = ((dir_slot *)dentptr)->alias_checksum; |
624 | get_vfatname(mydata, curclust, | |
625 | get_dentfromdir_block, | |
626 | dentptr, l_name); | |
627 | if (dols) { | |
628 | int isdir; | |
629 | char dirc; | |
630 | int doit = 0; | |
631 | ||
632 | isdir = (dentptr->attr & ATTR_DIR); | |
633 | ||
634 | if (isdir) { | |
635 | dirs++; | |
636 | dirc = '/'; | |
637 | doit = 1; | |
638 | } else { | |
639 | dirc = ' '; | |
640 | if (l_name[0] != 0) { | |
641 | files++; | |
642 | doit = 1; | |
643 | } | |
644 | } | |
645 | if (doit) { | |
646 | if (dirc == ' ') { | |
647 | printf(" %8ld %s%c\n", | |
648 | (long)FAT2CPU32(dentptr->size), | |
649 | l_name, | |
650 | dirc); | |
651 | } else { | |
652 | printf(" %s%c\n", | |
653 | l_name, | |
654 | dirc); | |
655 | } | |
656 | } | |
657 | dentptr++; | |
658 | continue; | |
659 | } | |
660 | debug("vfatname: |%s|\n", l_name); | |
661 | } else | |
662 | #endif | |
663 | { | |
664 | /* Volume label or VFAT entry */ | |
665 | dentptr++; | |
666 | continue; | |
667 | } | |
71f95118 | 668 | } |
7385c28e WD |
669 | if (dentptr->name[0] == 0) { |
670 | if (dols) { | |
671 | printf("\n%d file(s), %d dir(s)\n\n", | |
672 | files, dirs); | |
673 | } | |
674 | debug("Dentname == NULL - %d\n", i); | |
675 | return NULL; | |
71f95118 | 676 | } |
71f95118 | 677 | #ifdef CONFIG_SUPPORT_VFAT |
ff04f6d1 MV |
678 | __u8 csum = mkcksum(dentptr->name, dentptr->ext); |
679 | if (dols && csum == prevcksum) { | |
bf34e7d9 | 680 | prevcksum = 0xffff; |
7385c28e WD |
681 | dentptr++; |
682 | continue; | |
683 | } | |
71f95118 | 684 | #endif |
7385c28e WD |
685 | get_name(dentptr, s_name); |
686 | if (dols) { | |
687 | int isdir = (dentptr->attr & ATTR_DIR); | |
688 | char dirc; | |
689 | int doit = 0; | |
690 | ||
691 | if (isdir) { | |
692 | dirs++; | |
693 | dirc = '/'; | |
694 | doit = 1; | |
695 | } else { | |
696 | dirc = ' '; | |
697 | if (s_name[0] != 0) { | |
698 | files++; | |
699 | doit = 1; | |
700 | } | |
701 | } | |
702 | ||
703 | if (doit) { | |
704 | if (dirc == ' ') { | |
705 | printf(" %8ld %s%c\n", | |
706 | (long)FAT2CPU32(dentptr->size), | |
707 | s_name, dirc); | |
708 | } else { | |
709 | printf(" %s%c\n", | |
710 | s_name, dirc); | |
711 | } | |
712 | } | |
713 | ||
714 | dentptr++; | |
715 | continue; | |
716 | } | |
717 | ||
718 | if (strcmp(filename, s_name) | |
719 | && strcmp(filename, l_name)) { | |
720 | debug("Mismatch: |%s|%s|\n", s_name, l_name); | |
721 | dentptr++; | |
722 | continue; | |
723 | } | |
724 | ||
725 | memcpy(retdent, dentptr, sizeof(dir_entry)); | |
726 | ||
727 | debug("DentName: %s", s_name); | |
728 | debug(", start: 0x%x", START(dentptr)); | |
729 | debug(", size: 0x%x %s\n", | |
730 | FAT2CPU32(dentptr->size), | |
731 | (dentptr->attr & ATTR_DIR) ? "(DIR)" : ""); | |
732 | ||
733 | return retdent; | |
71f95118 | 734 | } |
7385c28e WD |
735 | |
736 | curclust = get_fatent(mydata, curclust); | |
737 | if (CHECK_CLUST(curclust, mydata->fatsize)) { | |
738 | debug("curclust: 0x%x\n", curclust); | |
739 | printf("Invalid FAT entry\n"); | |
740 | return NULL; | |
71f95118 | 741 | } |
71f95118 | 742 | } |
71f95118 | 743 | |
7385c28e | 744 | return NULL; |
71f95118 WD |
745 | } |
746 | ||
71f95118 WD |
747 | /* |
748 | * Read boot sector and volume info from a FAT filesystem | |
749 | */ | |
750 | static int | |
9795e07b | 751 | read_bootsectandvi(boot_sector *bs, volume_info *volinfo, int *fatsize) |
71f95118 | 752 | { |
ac497771 | 753 | __u8 *block; |
71f95118 | 754 | volume_info *vistart; |
ac497771 SS |
755 | int ret = 0; |
756 | ||
757 | if (cur_dev == NULL) { | |
758 | debug("Error: no device selected\n"); | |
759 | return -1; | |
760 | } | |
761 | ||
9a800ac7 | 762 | block = memalign(ARCH_DMA_MINALIGN, cur_dev->blksz); |
ac497771 SS |
763 | if (block == NULL) { |
764 | debug("Error: allocating block\n"); | |
765 | return -1; | |
766 | } | |
71f95118 | 767 | |
9795e07b | 768 | if (disk_read(0, 1, block) < 0) { |
7385c28e | 769 | debug("Error: reading block\n"); |
ac497771 | 770 | goto fail; |
71f95118 WD |
771 | } |
772 | ||
773 | memcpy(bs, block, sizeof(boot_sector)); | |
7385c28e WD |
774 | bs->reserved = FAT2CPU16(bs->reserved); |
775 | bs->fat_length = FAT2CPU16(bs->fat_length); | |
776 | bs->secs_track = FAT2CPU16(bs->secs_track); | |
777 | bs->heads = FAT2CPU16(bs->heads); | |
778 | bs->total_sect = FAT2CPU32(bs->total_sect); | |
71f95118 WD |
779 | |
780 | /* FAT32 entries */ | |
781 | if (bs->fat_length == 0) { | |
782 | /* Assume FAT32 */ | |
783 | bs->fat32_length = FAT2CPU32(bs->fat32_length); | |
7385c28e | 784 | bs->flags = FAT2CPU16(bs->flags); |
71f95118 | 785 | bs->root_cluster = FAT2CPU32(bs->root_cluster); |
7385c28e WD |
786 | bs->info_sector = FAT2CPU16(bs->info_sector); |
787 | bs->backup_boot = FAT2CPU16(bs->backup_boot); | |
788 | vistart = (volume_info *)(block + sizeof(boot_sector)); | |
71f95118 WD |
789 | *fatsize = 32; |
790 | } else { | |
7385c28e | 791 | vistart = (volume_info *)&(bs->fat32_length); |
71f95118 WD |
792 | *fatsize = 0; |
793 | } | |
794 | memcpy(volinfo, vistart, sizeof(volume_info)); | |
795 | ||
71f95118 | 796 | if (*fatsize == 32) { |
7385c28e | 797 | if (strncmp(FAT32_SIGN, vistart->fs_type, SIGNLEN) == 0) |
ac497771 | 798 | goto exit; |
71f95118 | 799 | } else { |
651351fe | 800 | if (strncmp(FAT12_SIGN, vistart->fs_type, SIGNLEN) == 0) { |
71f95118 | 801 | *fatsize = 12; |
ac497771 | 802 | goto exit; |
71f95118 | 803 | } |
651351fe | 804 | if (strncmp(FAT16_SIGN, vistart->fs_type, SIGNLEN) == 0) { |
71f95118 | 805 | *fatsize = 16; |
ac497771 | 806 | goto exit; |
71f95118 WD |
807 | } |
808 | } | |
809 | ||
7385c28e | 810 | debug("Error: broken fs_type sign\n"); |
ac497771 SS |
811 | fail: |
812 | ret = -1; | |
813 | exit: | |
814 | free(block); | |
815 | return ret; | |
71f95118 WD |
816 | } |
817 | ||
1170e634 | 818 | __u8 do_fat_read_at_block[MAX_CLUSTSIZE] |
9a800ac7 | 819 | __aligned(ARCH_DMA_MINALIGN); |
7385c28e | 820 | |
20cc00dd | 821 | long |
1170e634 BT |
822 | do_fat_read_at(const char *filename, unsigned long pos, void *buffer, |
823 | unsigned long maxsize, int dols) | |
71f95118 | 824 | { |
7385c28e WD |
825 | char fnamecopy[2048]; |
826 | boot_sector bs; | |
827 | volume_info volinfo; | |
828 | fsdata datablock; | |
829 | fsdata *mydata = &datablock; | |
cd1b042c | 830 | dir_entry *dentptr = NULL; |
7385c28e WD |
831 | __u16 prevcksum = 0xffff; |
832 | char *subname = ""; | |
3f270f42 | 833 | __u32 cursect; |
7385c28e WD |
834 | int idx, isdir = 0; |
835 | int files = 0, dirs = 0; | |
ac497771 | 836 | long ret = -1; |
7385c28e | 837 | int firsttime; |
40e21916 | 838 | __u32 root_cluster = 0; |
3f270f42 | 839 | int rootdir_size = 0; |
7385c28e WD |
840 | int j; |
841 | ||
842 | if (read_bootsectandvi(&bs, &volinfo, &mydata->fatsize)) { | |
843 | debug("Error: reading boot sector\n"); | |
844 | return -1; | |
845 | } | |
846 | ||
40e21916 SS |
847 | if (mydata->fatsize == 32) { |
848 | root_cluster = bs.root_cluster; | |
7385c28e | 849 | mydata->fatlength = bs.fat32_length; |
40e21916 | 850 | } else { |
7385c28e | 851 | mydata->fatlength = bs.fat_length; |
40e21916 | 852 | } |
7385c28e WD |
853 | |
854 | mydata->fat_sect = bs.reserved; | |
855 | ||
856 | cursect = mydata->rootdir_sect | |
857 | = mydata->fat_sect + mydata->fatlength * bs.fats; | |
858 | ||
ac497771 | 859 | mydata->sect_size = (bs.sector_size[1] << 8) + bs.sector_size[0]; |
7385c28e | 860 | mydata->clust_size = bs.cluster_size; |
46236b14 KM |
861 | if (mydata->sect_size != cur_part_info.blksz) { |
862 | printf("Error: FAT sector size mismatch (fs=%hu, dev=%lu)\n", | |
863 | mydata->sect_size, cur_part_info.blksz); | |
864 | return -1; | |
865 | } | |
7385c28e WD |
866 | |
867 | if (mydata->fatsize == 32) { | |
868 | mydata->data_begin = mydata->rootdir_sect - | |
869 | (mydata->clust_size * 2); | |
870 | } else { | |
7385c28e WD |
871 | rootdir_size = ((bs.dir_entries[1] * (int)256 + |
872 | bs.dir_entries[0]) * | |
873 | sizeof(dir_entry)) / | |
ac497771 | 874 | mydata->sect_size; |
7385c28e WD |
875 | mydata->data_begin = mydata->rootdir_sect + |
876 | rootdir_size - | |
877 | (mydata->clust_size * 2); | |
878 | } | |
879 | ||
880 | mydata->fatbufnum = -1; | |
9a800ac7 | 881 | mydata->fatbuf = memalign(ARCH_DMA_MINALIGN, FATBUFSIZE); |
ac497771 SS |
882 | if (mydata->fatbuf == NULL) { |
883 | debug("Error: allocating memory\n"); | |
884 | return -1; | |
885 | } | |
71f95118 | 886 | |
2aa98c66 | 887 | #ifdef CONFIG_SUPPORT_VFAT |
7385c28e | 888 | debug("VFAT Support enabled\n"); |
2aa98c66 | 889 | #endif |
7385c28e WD |
890 | debug("FAT%d, fat_sect: %d, fatlength: %d\n", |
891 | mydata->fatsize, mydata->fat_sect, mydata->fatlength); | |
892 | debug("Rootdir begins at cluster: %d, sector: %d, offset: %x\n" | |
893 | "Data begins at: %d\n", | |
894 | root_cluster, | |
895 | mydata->rootdir_sect, | |
ac497771 SS |
896 | mydata->rootdir_sect * mydata->sect_size, mydata->data_begin); |
897 | debug("Sector size: %d, cluster size: %d\n", mydata->sect_size, | |
898 | mydata->clust_size); | |
7385c28e WD |
899 | |
900 | /* "cwd" is always the root... */ | |
901 | while (ISDIRDELIM(*filename)) | |
902 | filename++; | |
903 | ||
904 | /* Make a copy of the filename and convert it to lowercase */ | |
905 | strcpy(fnamecopy, filename); | |
906 | downcase(fnamecopy); | |
907 | ||
908 | if (*fnamecopy == '\0') { | |
909 | if (!dols) | |
ac497771 | 910 | goto exit; |
71f95118 | 911 | |
7385c28e WD |
912 | dols = LS_ROOT; |
913 | } else if ((idx = dirdelim(fnamecopy)) >= 0) { | |
914 | isdir = 1; | |
915 | fnamecopy[idx] = '\0'; | |
916 | subname = fnamecopy + idx + 1; | |
917 | ||
918 | /* Handle multiple delimiters */ | |
919 | while (ISDIRDELIM(*subname)) | |
920 | subname++; | |
921 | } else if (dols) { | |
922 | isdir = 1; | |
71f95118 | 923 | } |
71f95118 | 924 | |
7385c28e WD |
925 | j = 0; |
926 | while (1) { | |
927 | int i; | |
928 | ||
cd1b042c BT |
929 | if (j == 0) { |
930 | debug("FAT read sect=%d, clust_size=%d, DIRENTSPERBLOCK=%zd\n", | |
931 | cursect, mydata->clust_size, DIRENTSPERBLOCK); | |
7385c28e | 932 | |
cd1b042c BT |
933 | if (disk_read(cursect, |
934 | (mydata->fatsize == 32) ? | |
935 | (mydata->clust_size) : | |
936 | PREFETCH_BLOCKS, | |
1170e634 | 937 | do_fat_read_at_block) < 0) { |
cd1b042c BT |
938 | debug("Error: reading rootdir block\n"); |
939 | goto exit; | |
940 | } | |
7385c28e | 941 | |
1170e634 | 942 | dentptr = (dir_entry *) do_fat_read_at_block; |
cd1b042c | 943 | } |
7385c28e WD |
944 | |
945 | for (i = 0; i < DIRENTSPERBLOCK; i++) { | |
3831530d | 946 | char s_name[14], l_name[VFAT_MAXLEN_BYTES]; |
ff04f6d1 | 947 | __u8 csum; |
7385c28e WD |
948 | |
949 | l_name[0] = '\0'; | |
3831530d MZ |
950 | if (dentptr->name[0] == DELETED_FLAG) { |
951 | dentptr++; | |
952 | continue; | |
953 | } | |
ff04f6d1 MV |
954 | |
955 | csum = mkcksum(dentptr->name, dentptr->ext); | |
956 | if (dentptr->attr & ATTR_VOLUME) { | |
71f95118 | 957 | #ifdef CONFIG_SUPPORT_VFAT |
206d68fd | 958 | if ((dentptr->attr & ATTR_VFAT) == ATTR_VFAT && |
7385c28e WD |
959 | (dentptr->name[0] & LAST_LONG_ENTRY_MASK)) { |
960 | prevcksum = | |
961 | ((dir_slot *)dentptr)->alias_checksum; | |
962 | ||
3831530d | 963 | get_vfatname(mydata, |
40e21916 | 964 | root_cluster, |
1170e634 | 965 | do_fat_read_at_block, |
7385c28e WD |
966 | dentptr, l_name); |
967 | ||
968 | if (dols == LS_ROOT) { | |
969 | char dirc; | |
970 | int doit = 0; | |
971 | int isdir = | |
972 | (dentptr->attr & ATTR_DIR); | |
973 | ||
974 | if (isdir) { | |
975 | dirs++; | |
976 | dirc = '/'; | |
977 | doit = 1; | |
978 | } else { | |
979 | dirc = ' '; | |
980 | if (l_name[0] != 0) { | |
981 | files++; | |
982 | doit = 1; | |
983 | } | |
984 | } | |
985 | if (doit) { | |
986 | if (dirc == ' ') { | |
987 | printf(" %8ld %s%c\n", | |
988 | (long)FAT2CPU32(dentptr->size), | |
989 | l_name, | |
990 | dirc); | |
991 | } else { | |
992 | printf(" %s%c\n", | |
993 | l_name, | |
994 | dirc); | |
995 | } | |
996 | } | |
997 | dentptr++; | |
998 | continue; | |
999 | } | |
1000 | debug("Rootvfatname: |%s|\n", | |
1001 | l_name); | |
1002 | } else | |
1003 | #endif | |
1004 | { | |
1005 | /* Volume label or VFAT entry */ | |
1006 | dentptr++; | |
1007 | continue; | |
1008 | } | |
1009 | } else if (dentptr->name[0] == 0) { | |
1010 | debug("RootDentname == NULL - %d\n", i); | |
1011 | if (dols == LS_ROOT) { | |
1012 | printf("\n%d file(s), %d dir(s)\n\n", | |
1013 | files, dirs); | |
ac497771 | 1014 | ret = 0; |
7385c28e | 1015 | } |
ac497771 | 1016 | goto exit; |
71f95118 | 1017 | } |
7385c28e | 1018 | #ifdef CONFIG_SUPPORT_VFAT |
ff04f6d1 | 1019 | else if (dols == LS_ROOT && csum == prevcksum) { |
bf34e7d9 | 1020 | prevcksum = 0xffff; |
7385c28e WD |
1021 | dentptr++; |
1022 | continue; | |
71f95118 | 1023 | } |
71f95118 | 1024 | #endif |
7385c28e WD |
1025 | get_name(dentptr, s_name); |
1026 | ||
1027 | if (dols == LS_ROOT) { | |
1028 | int isdir = (dentptr->attr & ATTR_DIR); | |
1029 | char dirc; | |
1030 | int doit = 0; | |
1031 | ||
1032 | if (isdir) { | |
1033 | dirc = '/'; | |
1034 | if (s_name[0] != 0) { | |
1035 | dirs++; | |
1036 | doit = 1; | |
1037 | } | |
1038 | } else { | |
1039 | dirc = ' '; | |
1040 | if (s_name[0] != 0) { | |
1041 | files++; | |
1042 | doit = 1; | |
1043 | } | |
1044 | } | |
1045 | if (doit) { | |
1046 | if (dirc == ' ') { | |
1047 | printf(" %8ld %s%c\n", | |
1048 | (long)FAT2CPU32(dentptr->size), | |
1049 | s_name, dirc); | |
1050 | } else { | |
1051 | printf(" %s%c\n", | |
1052 | s_name, dirc); | |
1053 | } | |
1054 | } | |
1055 | dentptr++; | |
1056 | continue; | |
1057 | } | |
1058 | ||
1059 | if (strcmp(fnamecopy, s_name) | |
1060 | && strcmp(fnamecopy, l_name)) { | |
1061 | debug("RootMismatch: |%s|%s|\n", s_name, | |
1062 | l_name); | |
1063 | dentptr++; | |
1064 | continue; | |
1065 | } | |
1066 | ||
1067 | if (isdir && !(dentptr->attr & ATTR_DIR)) | |
ac497771 | 1068 | goto exit; |
7385c28e WD |
1069 | |
1070 | debug("RootName: %s", s_name); | |
1071 | debug(", start: 0x%x", START(dentptr)); | |
1072 | debug(", size: 0x%x %s\n", | |
1073 | FAT2CPU32(dentptr->size), | |
1074 | isdir ? "(DIR)" : ""); | |
1075 | ||
1076 | goto rootdir_done; /* We got a match */ | |
71f95118 | 1077 | } |
7385c28e WD |
1078 | debug("END LOOP: j=%d clust_size=%d\n", j, |
1079 | mydata->clust_size); | |
1080 | ||
1081 | /* | |
1082 | * On FAT32 we must fetch the FAT entries for the next | |
1083 | * root directory clusters when a cluster has been | |
1084 | * completely processed. | |
1085 | */ | |
3f270f42 | 1086 | ++j; |
cd1b042c BT |
1087 | int rootdir_end = 0; |
1088 | if (mydata->fatsize == 32) { | |
1089 | if (j == mydata->clust_size) { | |
1090 | int nxtsect = 0; | |
1091 | int nxt_clust = 0; | |
7385c28e | 1092 | |
cd1b042c BT |
1093 | nxt_clust = get_fatent(mydata, root_cluster); |
1094 | rootdir_end = CHECK_CLUST(nxt_clust, 32); | |
7385c28e | 1095 | |
cd1b042c BT |
1096 | nxtsect = mydata->data_begin + |
1097 | (nxt_clust * mydata->clust_size); | |
7385c28e | 1098 | |
cd1b042c | 1099 | root_cluster = nxt_clust; |
7385c28e | 1100 | |
cd1b042c BT |
1101 | cursect = nxtsect; |
1102 | j = 0; | |
1103 | } | |
71f95118 | 1104 | } else { |
cd1b042c BT |
1105 | if (j == PREFETCH_BLOCKS) |
1106 | j = 0; | |
1107 | ||
1108 | rootdir_end = (++cursect - mydata->rootdir_sect >= | |
1109 | rootdir_size); | |
71f95118 | 1110 | } |
3f270f42 EH |
1111 | |
1112 | /* If end of rootdir reached */ | |
cd1b042c | 1113 | if (rootdir_end) { |
3f270f42 EH |
1114 | if (dols == LS_ROOT) { |
1115 | printf("\n%d file(s), %d dir(s)\n\n", | |
1116 | files, dirs); | |
ac497771 | 1117 | ret = 0; |
3f270f42 | 1118 | } |
ac497771 | 1119 | goto exit; |
3f270f42 | 1120 | } |
7385c28e WD |
1121 | } |
1122 | rootdir_done: | |
71f95118 | 1123 | |
7385c28e | 1124 | firsttime = 1; |
71f95118 | 1125 | |
7385c28e WD |
1126 | while (isdir) { |
1127 | int startsect = mydata->data_begin | |
1128 | + START(dentptr) * mydata->clust_size; | |
1129 | dir_entry dent; | |
1130 | char *nextname = NULL; | |
71f95118 | 1131 | |
7385c28e WD |
1132 | dent = *dentptr; |
1133 | dentptr = &dent; | |
71f95118 | 1134 | |
7385c28e WD |
1135 | idx = dirdelim(subname); |
1136 | ||
1137 | if (idx >= 0) { | |
1138 | subname[idx] = '\0'; | |
1139 | nextname = subname + idx + 1; | |
1140 | /* Handle multiple delimiters */ | |
1141 | while (ISDIRDELIM(*nextname)) | |
1142 | nextname++; | |
1143 | if (dols && *nextname == '\0') | |
1144 | firsttime = 0; | |
1145 | } else { | |
1146 | if (dols && firsttime) { | |
1147 | firsttime = 0; | |
1148 | } else { | |
1149 | isdir = 0; | |
1150 | } | |
1151 | } | |
1152 | ||
1153 | if (get_dentfromdir(mydata, startsect, subname, dentptr, | |
1154 | isdir ? 0 : dols) == NULL) { | |
1155 | if (dols && !isdir) | |
ac497771 SS |
1156 | ret = 0; |
1157 | goto exit; | |
7385c28e WD |
1158 | } |
1159 | ||
7ee46ceb BT |
1160 | if (isdir && !(dentptr->attr & ATTR_DIR)) |
1161 | goto exit; | |
1162 | ||
1163 | if (idx >= 0) | |
7385c28e | 1164 | subname = nextname; |
71f95118 | 1165 | } |
71f95118 | 1166 | |
1170e634 | 1167 | ret = get_contents(mydata, dentptr, pos, buffer, maxsize); |
7385c28e | 1168 | debug("Size: %d, got: %ld\n", FAT2CPU32(dentptr->size), ret); |
71f95118 | 1169 | |
ac497771 SS |
1170 | exit: |
1171 | free(mydata->fatbuf); | |
7385c28e WD |
1172 | return ret; |
1173 | } | |
71f95118 | 1174 | |
1170e634 BT |
1175 | long |
1176 | do_fat_read(const char *filename, void *buffer, unsigned long maxsize, int dols) | |
1177 | { | |
1178 | return do_fat_read_at(filename, 0, buffer, maxsize, dols); | |
1179 | } | |
1180 | ||
9795e07b | 1181 | int file_fat_detectfs(void) |
71f95118 | 1182 | { |
7385c28e WD |
1183 | boot_sector bs; |
1184 | volume_info volinfo; | |
1185 | int fatsize; | |
1186 | char vol_label[12]; | |
71f95118 | 1187 | |
7385c28e | 1188 | if (cur_dev == NULL) { |
7205e407 WD |
1189 | printf("No current device\n"); |
1190 | return 1; | |
1191 | } | |
7385c28e | 1192 | |
dd60d122 | 1193 | #if defined(CONFIG_CMD_IDE) || \ |
8c5170a7 | 1194 | defined(CONFIG_CMD_SATA) || \ |
dd60d122 JL |
1195 | defined(CONFIG_CMD_SCSI) || \ |
1196 | defined(CONFIG_CMD_USB) || \ | |
21f6f963 | 1197 | defined(CONFIG_MMC) |
7205e407 | 1198 | printf("Interface: "); |
7385c28e WD |
1199 | switch (cur_dev->if_type) { |
1200 | case IF_TYPE_IDE: | |
1201 | printf("IDE"); | |
1202 | break; | |
1203 | case IF_TYPE_SATA: | |
1204 | printf("SATA"); | |
1205 | break; | |
1206 | case IF_TYPE_SCSI: | |
1207 | printf("SCSI"); | |
1208 | break; | |
1209 | case IF_TYPE_ATAPI: | |
1210 | printf("ATAPI"); | |
1211 | break; | |
1212 | case IF_TYPE_USB: | |
1213 | printf("USB"); | |
1214 | break; | |
1215 | case IF_TYPE_DOC: | |
1216 | printf("DOC"); | |
1217 | break; | |
1218 | case IF_TYPE_MMC: | |
1219 | printf("MMC"); | |
1220 | break; | |
1221 | default: | |
1222 | printf("Unknown"); | |
7205e407 | 1223 | } |
7385c28e WD |
1224 | |
1225 | printf("\n Device %d: ", cur_dev->dev); | |
7205e407 WD |
1226 | dev_print(cur_dev); |
1227 | #endif | |
7385c28e WD |
1228 | |
1229 | if (read_bootsectandvi(&bs, &volinfo, &fatsize)) { | |
7205e407 WD |
1230 | printf("\nNo valid FAT fs found\n"); |
1231 | return 1; | |
1232 | } | |
7385c28e WD |
1233 | |
1234 | memcpy(vol_label, volinfo.volume_label, 11); | |
7205e407 | 1235 | vol_label[11] = '\0'; |
7385c28e WD |
1236 | volinfo.fs_type[5] = '\0'; |
1237 | ||
461f86e6 | 1238 | printf("Filesystem: %s \"%s\"\n", volinfo.fs_type, vol_label); |
7385c28e | 1239 | |
7205e407 | 1240 | return 0; |
71f95118 WD |
1241 | } |
1242 | ||
9795e07b | 1243 | int file_fat_ls(const char *dir) |
71f95118 WD |
1244 | { |
1245 | return do_fat_read(dir, NULL, 0, LS_YES); | |
1246 | } | |
1247 | ||
1170e634 BT |
1248 | long file_fat_read_at(const char *filename, unsigned long pos, void *buffer, |
1249 | unsigned long maxsize) | |
71f95118 | 1250 | { |
7385c28e | 1251 | printf("reading %s\n", filename); |
1170e634 BT |
1252 | return do_fat_read_at(filename, pos, buffer, maxsize, LS_NO); |
1253 | } | |
1254 | ||
1255 | long file_fat_read(const char *filename, void *buffer, unsigned long maxsize) | |
1256 | { | |
1257 | return file_fat_read_at(filename, 0, buffer, maxsize); | |
71f95118 | 1258 | } |