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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 | * | |
1a459660 | 9 | * SPDX-License-Identifier: GPL-2.0+ |
71f95118 WD |
10 | */ |
11 | ||
12 | #include <common.h> | |
2a981dc2 | 13 | #include <blk.h> |
71f95118 | 14 | #include <config.h> |
ac497771 | 15 | #include <exports.h> |
71f95118 WD |
16 | #include <fat.h> |
17 | #include <asm/byteorder.h> | |
7205e407 | 18 | #include <part.h> |
9a800ac7 | 19 | #include <malloc.h> |
cf92e05c | 20 | #include <memalign.h> |
9a800ac7 | 21 | #include <linux/compiler.h> |
fb7e16cc | 22 | #include <linux/ctype.h> |
71f95118 | 23 | |
cb940c7e RG |
24 | #ifdef CONFIG_SUPPORT_VFAT |
25 | static const int vfat_enabled = 1; | |
26 | #else | |
27 | static const int vfat_enabled = 0; | |
28 | #endif | |
29 | ||
71f95118 WD |
30 | /* |
31 | * Convert a string to lowercase. | |
32 | */ | |
9795e07b | 33 | static void downcase(char *str) |
71f95118 WD |
34 | { |
35 | while (*str != '\0') { | |
fb7e16cc | 36 | *str = tolower(*str); |
71f95118 WD |
37 | str++; |
38 | } | |
39 | } | |
40 | ||
4101f687 | 41 | static struct blk_desc *cur_dev; |
9813b750 | 42 | static disk_partition_t cur_part_info; |
7385c28e | 43 | |
9813b750 | 44 | #define DOS_BOOT_MAGIC_OFFSET 0x1fe |
7205e407 | 45 | #define DOS_FS_TYPE_OFFSET 0x36 |
66c2d73c | 46 | #define DOS_FS32_TYPE_OFFSET 0x52 |
71f95118 | 47 | |
9813b750 | 48 | static int disk_read(__u32 block, __u32 nr_blocks, void *buf) |
71f95118 | 49 | { |
0a04ed86 ŁM |
50 | ulong ret; |
51 | ||
2a981dc2 | 52 | if (!cur_dev) |
7205e407 | 53 | return -1; |
7385c28e | 54 | |
2a981dc2 | 55 | ret = blk_dread(cur_dev, cur_part_info.start + block, nr_blocks, buf); |
0a04ed86 ŁM |
56 | |
57 | if (nr_blocks && ret == 0) | |
58 | return -1; | |
59 | ||
60 | return ret; | |
71f95118 WD |
61 | } |
62 | ||
4101f687 | 63 | int fat_set_blk_dev(struct blk_desc *dev_desc, disk_partition_t *info) |
71f95118 | 64 | { |
9a800ac7 | 65 | ALLOC_CACHE_ALIGN_BUFFER(unsigned char, buffer, dev_desc->blksz); |
7205e407 | 66 | |
5e8f9831 SW |
67 | cur_dev = dev_desc; |
68 | cur_part_info = *info; | |
9813b750 KM |
69 | |
70 | /* Make sure it has a valid FAT header */ | |
71 | if (disk_read(0, 1, buffer) != 1) { | |
72 | cur_dev = NULL; | |
73 | return -1; | |
bf1060ea | 74 | } |
9813b750 KM |
75 | |
76 | /* Check if it's actually a DOS volume */ | |
77 | if (memcmp(buffer + DOS_BOOT_MAGIC_OFFSET, "\x55\xAA", 2)) { | |
78 | cur_dev = NULL; | |
79 | return -1; | |
80 | } | |
81 | ||
82 | /* Check for FAT12/FAT16/FAT32 filesystem */ | |
83 | if (!memcmp(buffer + DOS_FS_TYPE_OFFSET, "FAT", 3)) | |
84 | return 0; | |
85 | if (!memcmp(buffer + DOS_FS32_TYPE_OFFSET, "FAT32", 5)) | |
86 | return 0; | |
87 | ||
88 | cur_dev = NULL; | |
89 | return -1; | |
71f95118 WD |
90 | } |
91 | ||
4101f687 | 92 | int fat_register_device(struct blk_desc *dev_desc, int part_no) |
5e8f9831 SW |
93 | { |
94 | disk_partition_t info; | |
95 | ||
96 | /* First close any currently found FAT filesystem */ | |
97 | cur_dev = NULL; | |
98 | ||
99 | /* Read the partition table, if present */ | |
3e8bd469 | 100 | if (part_get_info(dev_desc, part_no, &info)) { |
5e8f9831 SW |
101 | if (part_no != 0) { |
102 | printf("** Partition %d not valid on device %d **\n", | |
bcce53d0 | 103 | part_no, dev_desc->devnum); |
5e8f9831 SW |
104 | return -1; |
105 | } | |
106 | ||
107 | info.start = 0; | |
108 | info.size = dev_desc->lba; | |
109 | info.blksz = dev_desc->blksz; | |
110 | info.name[0] = 0; | |
111 | info.type[0] = 0; | |
112 | info.bootable = 0; | |
113 | #ifdef CONFIG_PARTITION_UUIDS | |
114 | info.uuid[0] = 0; | |
115 | #endif | |
116 | } | |
117 | ||
118 | return fat_set_blk_dev(dev_desc, &info); | |
119 | } | |
9813b750 | 120 | |
71f95118 WD |
121 | /* |
122 | * Get the first occurence of a directory delimiter ('/' or '\') in a string. | |
123 | * Return index into string if found, -1 otherwise. | |
124 | */ | |
9795e07b | 125 | static int dirdelim(char *str) |
71f95118 WD |
126 | { |
127 | char *start = str; | |
128 | ||
129 | while (*str != '\0') { | |
7385c28e WD |
130 | if (ISDIRDELIM(*str)) |
131 | return str - start; | |
71f95118 WD |
132 | str++; |
133 | } | |
134 | return -1; | |
135 | } | |
136 | ||
71f95118 WD |
137 | /* |
138 | * Extract zero terminated short name from a directory entry. | |
139 | */ | |
9795e07b | 140 | static void get_name(dir_entry *dirent, char *s_name) |
71f95118 WD |
141 | { |
142 | char *ptr; | |
143 | ||
7385c28e | 144 | memcpy(s_name, dirent->name, 8); |
71f95118 WD |
145 | s_name[8] = '\0'; |
146 | ptr = s_name; | |
147 | while (*ptr && *ptr != ' ') | |
148 | ptr++; | |
149 | if (dirent->ext[0] && dirent->ext[0] != ' ') { | |
150 | *ptr = '.'; | |
151 | ptr++; | |
7385c28e | 152 | memcpy(ptr, dirent->ext, 3); |
71f95118 WD |
153 | ptr[3] = '\0'; |
154 | while (*ptr && *ptr != ' ') | |
155 | ptr++; | |
156 | } | |
157 | *ptr = '\0'; | |
158 | if (*s_name == DELETED_FLAG) | |
159 | *s_name = '\0'; | |
160 | else if (*s_name == aRING) | |
3c2c2f42 | 161 | *s_name = DELETED_FLAG; |
7385c28e | 162 | downcase(s_name); |
71f95118 WD |
163 | } |
164 | ||
b8948d2a SB |
165 | static int flush_dirty_fat_buffer(fsdata *mydata); |
166 | #if !defined(CONFIG_FAT_WRITE) | |
167 | /* Stub for read only operation */ | |
168 | int flush_dirty_fat_buffer(fsdata *mydata) | |
169 | { | |
170 | (void)(mydata); | |
171 | return 0; | |
172 | } | |
173 | #endif | |
174 | ||
71f95118 WD |
175 | /* |
176 | * Get the entry at index 'entry' in a FAT (12/16/32) table. | |
177 | * On failure 0x00 is returned. | |
178 | */ | |
9795e07b | 179 | static __u32 get_fatent(fsdata *mydata, __u32 entry) |
71f95118 WD |
180 | { |
181 | __u32 bufnum; | |
7385c28e | 182 | __u32 off16, offset; |
71f95118 | 183 | __u32 ret = 0x00; |
7385c28e | 184 | __u16 val1, val2; |
71f95118 | 185 | |
b8948d2a SB |
186 | if (CHECK_CLUST(entry, mydata->fatsize)) { |
187 | printf("Error: Invalid FAT entry: 0x%08x\n", entry); | |
188 | return ret; | |
189 | } | |
190 | ||
71f95118 WD |
191 | switch (mydata->fatsize) { |
192 | case 32: | |
193 | bufnum = entry / FAT32BUFSIZE; | |
194 | offset = entry - bufnum * FAT32BUFSIZE; | |
195 | break; | |
196 | case 16: | |
197 | bufnum = entry / FAT16BUFSIZE; | |
198 | offset = entry - bufnum * FAT16BUFSIZE; | |
199 | break; | |
200 | case 12: | |
201 | bufnum = entry / FAT12BUFSIZE; | |
202 | offset = entry - bufnum * FAT12BUFSIZE; | |
203 | break; | |
204 | ||
205 | default: | |
206 | /* Unsupported FAT size */ | |
207 | return ret; | |
208 | } | |
209 | ||
b8948d2a | 210 | debug("FAT%d: entry: 0x%08x = %d, offset: 0x%04x = %d\n", |
7385c28e | 211 | mydata->fatsize, entry, entry, offset, offset); |
2aa98c66 | 212 | |
71f95118 WD |
213 | /* Read a new block of FAT entries into the cache. */ |
214 | if (bufnum != mydata->fatbufnum) { | |
60b36f0f | 215 | __u32 getsize = FATBUFBLOCKS; |
71f95118 WD |
216 | __u8 *bufptr = mydata->fatbuf; |
217 | __u32 fatlength = mydata->fatlength; | |
218 | __u32 startblock = bufnum * FATBUFBLOCKS; | |
219 | ||
6c1a8080 | 220 | /* Cap length if fatlength is not a multiple of FATBUFBLOCKS */ |
8006dd2e BT |
221 | if (startblock + getsize > fatlength) |
222 | getsize = fatlength - startblock; | |
60b36f0f | 223 | |
71f95118 WD |
224 | startblock += mydata->fat_sect; /* Offset from start of disk */ |
225 | ||
b8948d2a SB |
226 | /* Write back the fatbuf to the disk */ |
227 | if (flush_dirty_fat_buffer(mydata) < 0) | |
228 | return -1; | |
229 | ||
71f95118 | 230 | if (disk_read(startblock, getsize, bufptr) < 0) { |
7385c28e | 231 | debug("Error reading FAT blocks\n"); |
71f95118 WD |
232 | return ret; |
233 | } | |
234 | mydata->fatbufnum = bufnum; | |
235 | } | |
236 | ||
237 | /* Get the actual entry from the table */ | |
238 | switch (mydata->fatsize) { | |
239 | case 32: | |
7385c28e | 240 | ret = FAT2CPU32(((__u32 *) mydata->fatbuf)[offset]); |
71f95118 WD |
241 | break; |
242 | case 16: | |
7385c28e | 243 | ret = FAT2CPU16(((__u16 *) mydata->fatbuf)[offset]); |
71f95118 | 244 | break; |
7385c28e WD |
245 | case 12: |
246 | off16 = (offset * 3) / 4; | |
71f95118 WD |
247 | |
248 | switch (offset & 0x3) { | |
249 | case 0: | |
7385c28e | 250 | ret = FAT2CPU16(((__u16 *) mydata->fatbuf)[off16]); |
71f95118 WD |
251 | ret &= 0xfff; |
252 | break; | |
253 | case 1: | |
7385c28e | 254 | val1 = FAT2CPU16(((__u16 *)mydata->fatbuf)[off16]); |
71f95118 | 255 | val1 &= 0xf000; |
7385c28e | 256 | val2 = FAT2CPU16(((__u16 *)mydata->fatbuf)[off16 + 1]); |
71f95118 WD |
257 | val2 &= 0x00ff; |
258 | ret = (val2 << 4) | (val1 >> 12); | |
259 | break; | |
260 | case 2: | |
7385c28e | 261 | val1 = FAT2CPU16(((__u16 *)mydata->fatbuf)[off16]); |
71f95118 | 262 | val1 &= 0xff00; |
7385c28e | 263 | val2 = FAT2CPU16(((__u16 *)mydata->fatbuf)[off16 + 1]); |
71f95118 WD |
264 | val2 &= 0x000f; |
265 | ret = (val2 << 8) | (val1 >> 8); | |
266 | break; | |
267 | case 3: | |
7385c28e | 268 | ret = FAT2CPU16(((__u16 *)mydata->fatbuf)[off16]); |
71f95118 WD |
269 | ret = (ret & 0xfff0) >> 4; |
270 | break; | |
271 | default: | |
272 | break; | |
273 | } | |
7385c28e | 274 | break; |
71f95118 | 275 | } |
b8948d2a SB |
276 | debug("FAT%d: ret: 0x%08x, entry: 0x%08x, offset: 0x%04x\n", |
277 | mydata->fatsize, ret, entry, offset); | |
71f95118 WD |
278 | |
279 | return ret; | |
280 | } | |
281 | ||
71f95118 WD |
282 | /* |
283 | * Read at most 'size' bytes from the specified cluster into 'buffer'. | |
284 | * Return 0 on success, -1 otherwise. | |
285 | */ | |
286 | static int | |
9795e07b | 287 | get_cluster(fsdata *mydata, __u32 clustnum, __u8 *buffer, unsigned long size) |
71f95118 | 288 | { |
3f270f42 | 289 | __u32 idx = 0; |
71f95118 | 290 | __u32 startsect; |
46236b14 | 291 | int ret; |
71f95118 WD |
292 | |
293 | if (clustnum > 0) { | |
7385c28e WD |
294 | startsect = mydata->data_begin + |
295 | clustnum * mydata->clust_size; | |
71f95118 WD |
296 | } else { |
297 | startsect = mydata->rootdir_sect; | |
298 | } | |
299 | ||
7385c28e WD |
300 | debug("gc - clustnum: %d, startsect: %d\n", clustnum, startsect); |
301 | ||
cc63b25e | 302 | if ((unsigned long)buffer & (ARCH_DMA_MINALIGN - 1)) { |
9a800ac7 | 303 | ALLOC_CACHE_ALIGN_BUFFER(__u8, tmpbuf, mydata->sect_size); |
7385c28e | 304 | |
cc63b25e BT |
305 | printf("FAT: Misaligned buffer address (%p)\n", buffer); |
306 | ||
307 | while (size >= mydata->sect_size) { | |
308 | ret = disk_read(startsect++, 1, tmpbuf); | |
309 | if (ret != 1) { | |
310 | debug("Error reading data (got %d)\n", ret); | |
311 | return -1; | |
312 | } | |
313 | ||
314 | memcpy(buffer, tmpbuf, mydata->sect_size); | |
315 | buffer += mydata->sect_size; | |
316 | size -= mydata->sect_size; | |
317 | } | |
318 | } else { | |
ac497771 | 319 | idx = size / mydata->sect_size; |
cc63b25e BT |
320 | ret = disk_read(startsect, idx, buffer); |
321 | if (ret != idx) { | |
322 | debug("Error reading data (got %d)\n", ret); | |
323 | return -1; | |
324 | } | |
325 | startsect += idx; | |
326 | idx *= mydata->sect_size; | |
327 | buffer += idx; | |
328 | size -= idx; | |
329 | } | |
330 | if (size) { | |
331 | ALLOC_CACHE_ALIGN_BUFFER(__u8, tmpbuf, mydata->sect_size); | |
332 | ||
333 | ret = disk_read(startsect, 1, tmpbuf); | |
46236b14 KM |
334 | if (ret != 1) { |
335 | debug("Error reading data (got %d)\n", ret); | |
7205e407 | 336 | return -1; |
71f95118 | 337 | } |
7205e407 | 338 | |
cc63b25e | 339 | memcpy(buffer, tmpbuf, size); |
71f95118 WD |
340 | } |
341 | ||
342 | return 0; | |
343 | } | |
344 | ||
71f95118 | 345 | /* |
1170e634 | 346 | * Read at most 'maxsize' bytes from 'pos' in the file associated with 'dentptr' |
71f95118 | 347 | * into 'buffer'. |
1ad0b98a | 348 | * Update the number of bytes read in *gotsize or return -1 on fatal errors. |
71f95118 | 349 | */ |
1170e634 BT |
350 | __u8 get_contents_vfatname_block[MAX_CLUSTSIZE] |
351 | __aligned(ARCH_DMA_MINALIGN); | |
352 | ||
1ad0b98a SR |
353 | static int get_contents(fsdata *mydata, dir_entry *dentptr, loff_t pos, |
354 | __u8 *buffer, loff_t maxsize, loff_t *gotsize) | |
71f95118 | 355 | { |
1ad0b98a | 356 | loff_t filesize = FAT2CPU32(dentptr->size); |
ac497771 | 357 | unsigned int bytesperclust = mydata->clust_size * mydata->sect_size; |
71f95118 | 358 | __u32 curclust = START(dentptr); |
7205e407 | 359 | __u32 endclust, newclust; |
1ad0b98a | 360 | loff_t actsize; |
71f95118 | 361 | |
1ad0b98a SR |
362 | *gotsize = 0; |
363 | debug("Filesize: %llu bytes\n", filesize); | |
71f95118 | 364 | |
1170e634 | 365 | if (pos >= filesize) { |
1ad0b98a SR |
366 | debug("Read position past EOF: %llu\n", pos); |
367 | return 0; | |
1170e634 BT |
368 | } |
369 | ||
370 | if (maxsize > 0 && filesize > pos + maxsize) | |
371 | filesize = pos + maxsize; | |
71f95118 | 372 | |
1ad0b98a | 373 | debug("%llu bytes\n", filesize); |
7385c28e | 374 | |
1170e634 BT |
375 | actsize = bytesperclust; |
376 | ||
377 | /* go to cluster at pos */ | |
378 | while (actsize <= pos) { | |
379 | curclust = get_fatent(mydata, curclust); | |
380 | if (CHECK_CLUST(curclust, mydata->fatsize)) { | |
381 | debug("curclust: 0x%x\n", curclust); | |
382 | debug("Invalid FAT entry\n"); | |
1ad0b98a | 383 | return 0; |
1170e634 BT |
384 | } |
385 | actsize += bytesperclust; | |
386 | } | |
387 | ||
388 | /* actsize > pos */ | |
389 | actsize -= bytesperclust; | |
390 | filesize -= actsize; | |
391 | pos -= actsize; | |
392 | ||
393 | /* align to beginning of next cluster if any */ | |
394 | if (pos) { | |
1ad0b98a | 395 | actsize = min(filesize, (loff_t)bytesperclust); |
1170e634 BT |
396 | if (get_cluster(mydata, curclust, get_contents_vfatname_block, |
397 | (int)actsize) != 0) { | |
398 | printf("Error reading cluster\n"); | |
399 | return -1; | |
400 | } | |
401 | filesize -= actsize; | |
402 | actsize -= pos; | |
403 | memcpy(buffer, get_contents_vfatname_block + pos, actsize); | |
1ad0b98a | 404 | *gotsize += actsize; |
1170e634 | 405 | if (!filesize) |
1ad0b98a | 406 | return 0; |
1170e634 BT |
407 | buffer += actsize; |
408 | ||
409 | curclust = get_fatent(mydata, curclust); | |
410 | if (CHECK_CLUST(curclust, mydata->fatsize)) { | |
411 | debug("curclust: 0x%x\n", curclust); | |
412 | debug("Invalid FAT entry\n"); | |
1ad0b98a | 413 | return 0; |
1170e634 BT |
414 | } |
415 | } | |
416 | ||
7385c28e WD |
417 | actsize = bytesperclust; |
418 | endclust = curclust; | |
71f95118 WD |
419 | |
420 | do { | |
7205e407 | 421 | /* search for consecutive clusters */ |
7385c28e | 422 | while (actsize < filesize) { |
7205e407 | 423 | newclust = get_fatent(mydata, endclust); |
7385c28e | 424 | if ((newclust - 1) != endclust) |
7205e407 | 425 | goto getit; |
8ce4e5c2 | 426 | if (CHECK_CLUST(newclust, mydata->fatsize)) { |
7385c28e WD |
427 | debug("curclust: 0x%x\n", newclust); |
428 | debug("Invalid FAT entry\n"); | |
1ad0b98a | 429 | return 0; |
7205e407 | 430 | } |
7385c28e WD |
431 | endclust = newclust; |
432 | actsize += bytesperclust; | |
7205e407 | 433 | } |
7385c28e | 434 | |
7205e407 | 435 | /* get remaining bytes */ |
7385c28e | 436 | actsize = filesize; |
0880e5bb | 437 | if (get_cluster(mydata, curclust, buffer, (int)actsize) != 0) { |
7385c28e | 438 | printf("Error reading cluster\n"); |
7205e407 WD |
439 | return -1; |
440 | } | |
1ad0b98a SR |
441 | *gotsize += actsize; |
442 | return 0; | |
7205e407 WD |
443 | getit: |
444 | if (get_cluster(mydata, curclust, buffer, (int)actsize) != 0) { | |
7385c28e | 445 | printf("Error reading cluster\n"); |
7205e407 WD |
446 | return -1; |
447 | } | |
1ad0b98a | 448 | *gotsize += (int)actsize; |
7205e407 WD |
449 | filesize -= actsize; |
450 | buffer += actsize; | |
7385c28e | 451 | |
7205e407 | 452 | curclust = get_fatent(mydata, endclust); |
8ce4e5c2 | 453 | if (CHECK_CLUST(curclust, mydata->fatsize)) { |
7385c28e WD |
454 | debug("curclust: 0x%x\n", curclust); |
455 | printf("Invalid FAT entry\n"); | |
1ad0b98a | 456 | return 0; |
71f95118 | 457 | } |
7385c28e WD |
458 | actsize = bytesperclust; |
459 | endclust = curclust; | |
71f95118 WD |
460 | } while (1); |
461 | } | |
462 | ||
71f95118 WD |
463 | /* |
464 | * Extract the file name information from 'slotptr' into 'l_name', | |
465 | * starting at l_name[*idx]. | |
466 | * Return 1 if terminator (zero byte) is found, 0 otherwise. | |
467 | */ | |
9795e07b | 468 | static int slot2str(dir_slot *slotptr, char *l_name, int *idx) |
71f95118 WD |
469 | { |
470 | int j; | |
471 | ||
472 | for (j = 0; j <= 8; j += 2) { | |
473 | l_name[*idx] = slotptr->name0_4[j]; | |
7385c28e WD |
474 | if (l_name[*idx] == 0x00) |
475 | return 1; | |
71f95118 WD |
476 | (*idx)++; |
477 | } | |
478 | for (j = 0; j <= 10; j += 2) { | |
479 | l_name[*idx] = slotptr->name5_10[j]; | |
7385c28e WD |
480 | if (l_name[*idx] == 0x00) |
481 | return 1; | |
71f95118 WD |
482 | (*idx)++; |
483 | } | |
484 | for (j = 0; j <= 2; j += 2) { | |
485 | l_name[*idx] = slotptr->name11_12[j]; | |
7385c28e WD |
486 | if (l_name[*idx] == 0x00) |
487 | return 1; | |
71f95118 WD |
488 | (*idx)++; |
489 | } | |
490 | ||
491 | return 0; | |
492 | } | |
493 | ||
71f95118 WD |
494 | /* |
495 | * Extract the full long filename starting at 'retdent' (which is really | |
496 | * a slot) into 'l_name'. If successful also copy the real directory entry | |
497 | * into 'retdent' | |
498 | * Return 0 on success, -1 otherwise. | |
499 | */ | |
500 | static int | |
9795e07b BT |
501 | get_vfatname(fsdata *mydata, int curclust, __u8 *cluster, |
502 | dir_entry *retdent, char *l_name) | |
71f95118 WD |
503 | { |
504 | dir_entry *realdent; | |
7385c28e | 505 | dir_slot *slotptr = (dir_slot *)retdent; |
025421ea SS |
506 | __u8 *buflimit = cluster + mydata->sect_size * ((curclust == 0) ? |
507 | PREFETCH_BLOCKS : | |
508 | mydata->clust_size); | |
7385c28e | 509 | __u8 counter = (slotptr->id & ~LAST_LONG_ENTRY_MASK) & 0xff; |
71f95118 WD |
510 | int idx = 0; |
511 | ||
3831530d MZ |
512 | if (counter > VFAT_MAXSEQ) { |
513 | debug("Error: VFAT name is too long\n"); | |
514 | return -1; | |
515 | } | |
516 | ||
517 | while ((__u8 *)slotptr < buflimit) { | |
7385c28e WD |
518 | if (counter == 0) |
519 | break; | |
2d1a537d WD |
520 | if (((slotptr->id & ~LAST_LONG_ENTRY_MASK) & 0xff) != counter) |
521 | return -1; | |
71f95118 WD |
522 | slotptr++; |
523 | counter--; | |
524 | } | |
525 | ||
3831530d | 526 | if ((__u8 *)slotptr >= buflimit) { |
71f95118 WD |
527 | dir_slot *slotptr2; |
528 | ||
3831530d MZ |
529 | if (curclust == 0) |
530 | return -1; | |
71f95118 | 531 | curclust = get_fatent(mydata, curclust); |
8ce4e5c2 | 532 | if (CHECK_CLUST(curclust, mydata->fatsize)) { |
7385c28e WD |
533 | debug("curclust: 0x%x\n", curclust); |
534 | printf("Invalid FAT entry\n"); | |
71f95118 WD |
535 | return -1; |
536 | } | |
7385c28e | 537 | |
1170e634 | 538 | if (get_cluster(mydata, curclust, get_contents_vfatname_block, |
ac497771 | 539 | mydata->clust_size * mydata->sect_size) != 0) { |
7385c28e | 540 | debug("Error: reading directory block\n"); |
71f95118 WD |
541 | return -1; |
542 | } | |
7385c28e | 543 | |
1170e634 | 544 | slotptr2 = (dir_slot *)get_contents_vfatname_block; |
3831530d MZ |
545 | while (counter > 0) { |
546 | if (((slotptr2->id & ~LAST_LONG_ENTRY_MASK) | |
547 | & 0xff) != counter) | |
548 | return -1; | |
71f95118 | 549 | slotptr2++; |
3831530d MZ |
550 | counter--; |
551 | } | |
7385c28e | 552 | |
71f95118 | 553 | /* Save the real directory entry */ |
3831530d | 554 | realdent = (dir_entry *)slotptr2; |
1170e634 | 555 | while ((__u8 *)slotptr2 > get_contents_vfatname_block) { |
71f95118 | 556 | slotptr2--; |
3831530d | 557 | slot2str(slotptr2, l_name, &idx); |
71f95118 WD |
558 | } |
559 | } else { | |
560 | /* Save the real directory entry */ | |
7385c28e | 561 | realdent = (dir_entry *)slotptr; |
71f95118 WD |
562 | } |
563 | ||
564 | do { | |
565 | slotptr--; | |
7385c28e WD |
566 | if (slot2str(slotptr, l_name, &idx)) |
567 | break; | |
2d1a537d | 568 | } while (!(slotptr->id & LAST_LONG_ENTRY_MASK)); |
71f95118 WD |
569 | |
570 | l_name[idx] = '\0'; | |
7385c28e WD |
571 | if (*l_name == DELETED_FLAG) |
572 | *l_name = '\0'; | |
573 | else if (*l_name == aRING) | |
574 | *l_name = DELETED_FLAG; | |
71f95118 WD |
575 | downcase(l_name); |
576 | ||
577 | /* Return the real directory entry */ | |
578 | memcpy(retdent, realdent, sizeof(dir_entry)); | |
579 | ||
580 | return 0; | |
581 | } | |
582 | ||
71f95118 | 583 | /* Calculate short name checksum */ |
ff04f6d1 | 584 | static __u8 mkcksum(const char name[8], const char ext[3]) |
71f95118 WD |
585 | { |
586 | int i; | |
7385c28e | 587 | |
71f95118 WD |
588 | __u8 ret = 0; |
589 | ||
6ad77d88 | 590 | for (i = 0; i < 8; i++) |
ff04f6d1 | 591 | ret = (((ret & 1) << 7) | ((ret & 0xfe) >> 1)) + name[i]; |
6ad77d88 | 592 | for (i = 0; i < 3; i++) |
ff04f6d1 | 593 | ret = (((ret & 1) << 7) | ((ret & 0xfe) >> 1)) + ext[i]; |
71f95118 WD |
594 | |
595 | return ret; | |
596 | } | |
71f95118 WD |
597 | |
598 | /* | |
599 | * Get the directory entry associated with 'filename' from the directory | |
600 | * starting at 'startsect' | |
601 | */ | |
9a800ac7 EN |
602 | __u8 get_dentfromdir_block[MAX_CLUSTSIZE] |
603 | __aligned(ARCH_DMA_MINALIGN); | |
7385c28e | 604 | |
9795e07b BT |
605 | static dir_entry *get_dentfromdir(fsdata *mydata, int startsect, |
606 | char *filename, dir_entry *retdent, | |
607 | int dols) | |
71f95118 | 608 | { |
7385c28e WD |
609 | __u16 prevcksum = 0xffff; |
610 | __u32 curclust = START(retdent); | |
611 | int files = 0, dirs = 0; | |
71f95118 | 612 | |
7385c28e | 613 | debug("get_dentfromdir: %s\n", filename); |
71f95118 | 614 | |
7385c28e WD |
615 | while (1) { |
616 | dir_entry *dentptr; | |
617 | ||
618 | int i; | |
619 | ||
620 | if (get_cluster(mydata, curclust, get_dentfromdir_block, | |
ac497771 | 621 | mydata->clust_size * mydata->sect_size) != 0) { |
7385c28e WD |
622 | debug("Error: reading directory block\n"); |
623 | return NULL; | |
624 | } | |
625 | ||
626 | dentptr = (dir_entry *)get_dentfromdir_block; | |
627 | ||
628 | for (i = 0; i < DIRENTSPERCLUST; i++) { | |
3831530d | 629 | char s_name[14], l_name[VFAT_MAXLEN_BYTES]; |
7385c28e WD |
630 | |
631 | l_name[0] = '\0'; | |
632 | if (dentptr->name[0] == DELETED_FLAG) { | |
633 | dentptr++; | |
634 | continue; | |
635 | } | |
636 | if ((dentptr->attr & ATTR_VOLUME)) { | |
cb940c7e RG |
637 | if (vfat_enabled && |
638 | (dentptr->attr & ATTR_VFAT) == ATTR_VFAT && | |
206d68fd | 639 | (dentptr->name[0] & LAST_LONG_ENTRY_MASK)) { |
7385c28e WD |
640 | prevcksum = ((dir_slot *)dentptr)->alias_checksum; |
641 | get_vfatname(mydata, curclust, | |
642 | get_dentfromdir_block, | |
643 | dentptr, l_name); | |
644 | if (dols) { | |
645 | int isdir; | |
646 | char dirc; | |
647 | int doit = 0; | |
648 | ||
649 | isdir = (dentptr->attr & ATTR_DIR); | |
650 | ||
651 | if (isdir) { | |
652 | dirs++; | |
653 | dirc = '/'; | |
654 | doit = 1; | |
655 | } else { | |
656 | dirc = ' '; | |
657 | if (l_name[0] != 0) { | |
658 | files++; | |
659 | doit = 1; | |
660 | } | |
661 | } | |
662 | if (doit) { | |
663 | if (dirc == ' ') { | |
1ad0b98a SR |
664 | printf(" %8u %s%c\n", |
665 | FAT2CPU32(dentptr->size), | |
7385c28e WD |
666 | l_name, |
667 | dirc); | |
668 | } else { | |
669 | printf(" %s%c\n", | |
670 | l_name, | |
671 | dirc); | |
672 | } | |
673 | } | |
674 | dentptr++; | |
675 | continue; | |
676 | } | |
677 | debug("vfatname: |%s|\n", l_name); | |
cb940c7e | 678 | } else { |
7385c28e WD |
679 | /* Volume label or VFAT entry */ |
680 | dentptr++; | |
681 | continue; | |
682 | } | |
71f95118 | 683 | } |
7385c28e WD |
684 | if (dentptr->name[0] == 0) { |
685 | if (dols) { | |
686 | printf("\n%d file(s), %d dir(s)\n\n", | |
687 | files, dirs); | |
688 | } | |
689 | debug("Dentname == NULL - %d\n", i); | |
690 | return NULL; | |
71f95118 | 691 | } |
cb940c7e RG |
692 | if (vfat_enabled) { |
693 | __u8 csum = mkcksum(dentptr->name, dentptr->ext); | |
694 | if (dols && csum == prevcksum) { | |
695 | prevcksum = 0xffff; | |
696 | dentptr++; | |
697 | continue; | |
698 | } | |
7385c28e | 699 | } |
cb940c7e | 700 | |
7385c28e WD |
701 | get_name(dentptr, s_name); |
702 | if (dols) { | |
703 | int isdir = (dentptr->attr & ATTR_DIR); | |
704 | char dirc; | |
705 | int doit = 0; | |
706 | ||
707 | if (isdir) { | |
708 | dirs++; | |
709 | dirc = '/'; | |
710 | doit = 1; | |
711 | } else { | |
712 | dirc = ' '; | |
713 | if (s_name[0] != 0) { | |
714 | files++; | |
715 | doit = 1; | |
716 | } | |
717 | } | |
718 | ||
719 | if (doit) { | |
720 | if (dirc == ' ') { | |
1ad0b98a SR |
721 | printf(" %8u %s%c\n", |
722 | FAT2CPU32(dentptr->size), | |
7385c28e WD |
723 | s_name, dirc); |
724 | } else { | |
725 | printf(" %s%c\n", | |
726 | s_name, dirc); | |
727 | } | |
728 | } | |
729 | ||
730 | dentptr++; | |
731 | continue; | |
732 | } | |
733 | ||
734 | if (strcmp(filename, s_name) | |
735 | && strcmp(filename, l_name)) { | |
736 | debug("Mismatch: |%s|%s|\n", s_name, l_name); | |
737 | dentptr++; | |
738 | continue; | |
739 | } | |
740 | ||
741 | memcpy(retdent, dentptr, sizeof(dir_entry)); | |
742 | ||
743 | debug("DentName: %s", s_name); | |
744 | debug(", start: 0x%x", START(dentptr)); | |
745 | debug(", size: 0x%x %s\n", | |
746 | FAT2CPU32(dentptr->size), | |
747 | (dentptr->attr & ATTR_DIR) ? "(DIR)" : ""); | |
748 | ||
749 | return retdent; | |
71f95118 | 750 | } |
7385c28e WD |
751 | |
752 | curclust = get_fatent(mydata, curclust); | |
753 | if (CHECK_CLUST(curclust, mydata->fatsize)) { | |
754 | debug("curclust: 0x%x\n", curclust); | |
755 | printf("Invalid FAT entry\n"); | |
756 | return NULL; | |
71f95118 | 757 | } |
71f95118 | 758 | } |
71f95118 | 759 | |
7385c28e | 760 | return NULL; |
71f95118 WD |
761 | } |
762 | ||
71f95118 WD |
763 | /* |
764 | * Read boot sector and volume info from a FAT filesystem | |
765 | */ | |
766 | static int | |
9795e07b | 767 | read_bootsectandvi(boot_sector *bs, volume_info *volinfo, int *fatsize) |
71f95118 | 768 | { |
ac497771 | 769 | __u8 *block; |
71f95118 | 770 | volume_info *vistart; |
ac497771 SS |
771 | int ret = 0; |
772 | ||
773 | if (cur_dev == NULL) { | |
774 | debug("Error: no device selected\n"); | |
775 | return -1; | |
776 | } | |
777 | ||
9a800ac7 | 778 | block = memalign(ARCH_DMA_MINALIGN, cur_dev->blksz); |
ac497771 SS |
779 | if (block == NULL) { |
780 | debug("Error: allocating block\n"); | |
781 | return -1; | |
782 | } | |
71f95118 | 783 | |
9795e07b | 784 | if (disk_read(0, 1, block) < 0) { |
7385c28e | 785 | debug("Error: reading block\n"); |
ac497771 | 786 | goto fail; |
71f95118 WD |
787 | } |
788 | ||
789 | memcpy(bs, block, sizeof(boot_sector)); | |
7385c28e WD |
790 | bs->reserved = FAT2CPU16(bs->reserved); |
791 | bs->fat_length = FAT2CPU16(bs->fat_length); | |
792 | bs->secs_track = FAT2CPU16(bs->secs_track); | |
793 | bs->heads = FAT2CPU16(bs->heads); | |
794 | bs->total_sect = FAT2CPU32(bs->total_sect); | |
71f95118 WD |
795 | |
796 | /* FAT32 entries */ | |
797 | if (bs->fat_length == 0) { | |
798 | /* Assume FAT32 */ | |
799 | bs->fat32_length = FAT2CPU32(bs->fat32_length); | |
7385c28e | 800 | bs->flags = FAT2CPU16(bs->flags); |
71f95118 | 801 | bs->root_cluster = FAT2CPU32(bs->root_cluster); |
7385c28e WD |
802 | bs->info_sector = FAT2CPU16(bs->info_sector); |
803 | bs->backup_boot = FAT2CPU16(bs->backup_boot); | |
804 | vistart = (volume_info *)(block + sizeof(boot_sector)); | |
71f95118 WD |
805 | *fatsize = 32; |
806 | } else { | |
7385c28e | 807 | vistart = (volume_info *)&(bs->fat32_length); |
71f95118 WD |
808 | *fatsize = 0; |
809 | } | |
810 | memcpy(volinfo, vistart, sizeof(volume_info)); | |
811 | ||
71f95118 | 812 | if (*fatsize == 32) { |
7385c28e | 813 | if (strncmp(FAT32_SIGN, vistart->fs_type, SIGNLEN) == 0) |
ac497771 | 814 | goto exit; |
71f95118 | 815 | } else { |
651351fe | 816 | if (strncmp(FAT12_SIGN, vistart->fs_type, SIGNLEN) == 0) { |
71f95118 | 817 | *fatsize = 12; |
ac497771 | 818 | goto exit; |
71f95118 | 819 | } |
651351fe | 820 | if (strncmp(FAT16_SIGN, vistart->fs_type, SIGNLEN) == 0) { |
71f95118 | 821 | *fatsize = 16; |
ac497771 | 822 | goto exit; |
71f95118 WD |
823 | } |
824 | } | |
825 | ||
7385c28e | 826 | debug("Error: broken fs_type sign\n"); |
ac497771 SS |
827 | fail: |
828 | ret = -1; | |
829 | exit: | |
830 | free(block); | |
831 | return ret; | |
71f95118 WD |
832 | } |
833 | ||
1170e634 | 834 | __u8 do_fat_read_at_block[MAX_CLUSTSIZE] |
9a800ac7 | 835 | __aligned(ARCH_DMA_MINALIGN); |
7385c28e | 836 | |
1ad0b98a SR |
837 | int do_fat_read_at(const char *filename, loff_t pos, void *buffer, |
838 | loff_t maxsize, int dols, int dogetsize, loff_t *size) | |
71f95118 | 839 | { |
7385c28e WD |
840 | char fnamecopy[2048]; |
841 | boot_sector bs; | |
842 | volume_info volinfo; | |
843 | fsdata datablock; | |
844 | fsdata *mydata = &datablock; | |
cd1b042c | 845 | dir_entry *dentptr = NULL; |
7385c28e WD |
846 | __u16 prevcksum = 0xffff; |
847 | char *subname = ""; | |
3f270f42 | 848 | __u32 cursect; |
7385c28e WD |
849 | int idx, isdir = 0; |
850 | int files = 0, dirs = 0; | |
1ad0b98a | 851 | int ret = -1; |
7385c28e | 852 | int firsttime; |
40e21916 | 853 | __u32 root_cluster = 0; |
64f65e1e | 854 | __u32 read_blk; |
3f270f42 | 855 | int rootdir_size = 0; |
64f65e1e PM |
856 | int buffer_blk_cnt; |
857 | int do_read; | |
858 | __u8 *dir_ptr; | |
7385c28e WD |
859 | |
860 | if (read_bootsectandvi(&bs, &volinfo, &mydata->fatsize)) { | |
861 | debug("Error: reading boot sector\n"); | |
862 | return -1; | |
863 | } | |
864 | ||
40e21916 SS |
865 | if (mydata->fatsize == 32) { |
866 | root_cluster = bs.root_cluster; | |
7385c28e | 867 | mydata->fatlength = bs.fat32_length; |
40e21916 | 868 | } else { |
7385c28e | 869 | mydata->fatlength = bs.fat_length; |
40e21916 | 870 | } |
7385c28e WD |
871 | |
872 | mydata->fat_sect = bs.reserved; | |
873 | ||
874 | cursect = mydata->rootdir_sect | |
875 | = mydata->fat_sect + mydata->fatlength * bs.fats; | |
876 | ||
ac497771 | 877 | mydata->sect_size = (bs.sector_size[1] << 8) + bs.sector_size[0]; |
7385c28e | 878 | mydata->clust_size = bs.cluster_size; |
46236b14 KM |
879 | if (mydata->sect_size != cur_part_info.blksz) { |
880 | printf("Error: FAT sector size mismatch (fs=%hu, dev=%lu)\n", | |
881 | mydata->sect_size, cur_part_info.blksz); | |
882 | return -1; | |
883 | } | |
7385c28e WD |
884 | |
885 | if (mydata->fatsize == 32) { | |
886 | mydata->data_begin = mydata->rootdir_sect - | |
887 | (mydata->clust_size * 2); | |
888 | } else { | |
7385c28e WD |
889 | rootdir_size = ((bs.dir_entries[1] * (int)256 + |
890 | bs.dir_entries[0]) * | |
891 | sizeof(dir_entry)) / | |
ac497771 | 892 | mydata->sect_size; |
7385c28e WD |
893 | mydata->data_begin = mydata->rootdir_sect + |
894 | rootdir_size - | |
895 | (mydata->clust_size * 2); | |
896 | } | |
897 | ||
898 | mydata->fatbufnum = -1; | |
3c0ed9c3 | 899 | mydata->fat_dirty = 0; |
9a800ac7 | 900 | mydata->fatbuf = memalign(ARCH_DMA_MINALIGN, FATBUFSIZE); |
ac497771 SS |
901 | if (mydata->fatbuf == NULL) { |
902 | debug("Error: allocating memory\n"); | |
903 | return -1; | |
904 | } | |
71f95118 | 905 | |
cb940c7e RG |
906 | if (vfat_enabled) |
907 | debug("VFAT Support enabled\n"); | |
908 | ||
7385c28e WD |
909 | debug("FAT%d, fat_sect: %d, fatlength: %d\n", |
910 | mydata->fatsize, mydata->fat_sect, mydata->fatlength); | |
911 | debug("Rootdir begins at cluster: %d, sector: %d, offset: %x\n" | |
912 | "Data begins at: %d\n", | |
913 | root_cluster, | |
914 | mydata->rootdir_sect, | |
ac497771 SS |
915 | mydata->rootdir_sect * mydata->sect_size, mydata->data_begin); |
916 | debug("Sector size: %d, cluster size: %d\n", mydata->sect_size, | |
917 | mydata->clust_size); | |
7385c28e WD |
918 | |
919 | /* "cwd" is always the root... */ | |
920 | while (ISDIRDELIM(*filename)) | |
921 | filename++; | |
922 | ||
923 | /* Make a copy of the filename and convert it to lowercase */ | |
924 | strcpy(fnamecopy, filename); | |
925 | downcase(fnamecopy); | |
926 | ||
18a10d46 | 927 | root_reparse: |
7385c28e WD |
928 | if (*fnamecopy == '\0') { |
929 | if (!dols) | |
ac497771 | 930 | goto exit; |
71f95118 | 931 | |
7385c28e WD |
932 | dols = LS_ROOT; |
933 | } else if ((idx = dirdelim(fnamecopy)) >= 0) { | |
934 | isdir = 1; | |
935 | fnamecopy[idx] = '\0'; | |
936 | subname = fnamecopy + idx + 1; | |
937 | ||
938 | /* Handle multiple delimiters */ | |
939 | while (ISDIRDELIM(*subname)) | |
940 | subname++; | |
941 | } else if (dols) { | |
942 | isdir = 1; | |
71f95118 | 943 | } |
71f95118 | 944 | |
64f65e1e PM |
945 | buffer_blk_cnt = 0; |
946 | firsttime = 1; | |
7385c28e WD |
947 | while (1) { |
948 | int i; | |
949 | ||
64f65e1e PM |
950 | if (mydata->fatsize == 32 || firsttime) { |
951 | dir_ptr = do_fat_read_at_block; | |
952 | firsttime = 0; | |
953 | } else { | |
954 | /** | |
955 | * FAT16 sector buffer modification: | |
956 | * Each loop, the second buffered block is moved to | |
957 | * the buffer begin, and two next sectors are read | |
958 | * next to the previously moved one. So the sector | |
959 | * buffer keeps always 3 sectors for fat16. | |
960 | * And the current sector is the buffer second sector | |
961 | * beside the "firsttime" read, when it is the first one. | |
962 | * | |
963 | * PREFETCH_BLOCKS is 2 for FAT16 == loop[0:1] | |
964 | * n = computed root dir sector | |
965 | * loop | cursect-1 | cursect | cursect+1 | | |
966 | * 0 | sector n+0 | sector n+1 | none | | |
967 | * 1 | none | sector n+0 | sector n+1 | | |
968 | * 0 | sector n+1 | sector n+2 | sector n+3 | | |
969 | * 1 | sector n+3 | ... | |
970 | */ | |
971 | dir_ptr = (do_fat_read_at_block + mydata->sect_size); | |
972 | memcpy(do_fat_read_at_block, dir_ptr, mydata->sect_size); | |
973 | } | |
974 | ||
975 | do_read = 1; | |
976 | ||
977 | if (mydata->fatsize == 32 && buffer_blk_cnt) | |
978 | do_read = 0; | |
979 | ||
980 | if (do_read) { | |
981 | read_blk = (mydata->fatsize == 32) ? | |
982 | mydata->clust_size : PREFETCH_BLOCKS; | |
983 | ||
984 | debug("FAT read(sect=%d, cnt:%d), clust_size=%d, DIRENTSPERBLOCK=%zd\n", | |
985 | cursect, read_blk, mydata->clust_size, DIRENTSPERBLOCK); | |
7385c28e | 986 | |
64f65e1e | 987 | if (disk_read(cursect, read_blk, dir_ptr) < 0) { |
cd1b042c BT |
988 | debug("Error: reading rootdir block\n"); |
989 | goto exit; | |
990 | } | |
7385c28e | 991 | |
64f65e1e | 992 | dentptr = (dir_entry *)dir_ptr; |
cd1b042c | 993 | } |
7385c28e WD |
994 | |
995 | for (i = 0; i < DIRENTSPERBLOCK; i++) { | |
3831530d | 996 | char s_name[14], l_name[VFAT_MAXLEN_BYTES]; |
ff04f6d1 | 997 | __u8 csum; |
7385c28e WD |
998 | |
999 | l_name[0] = '\0'; | |
3831530d MZ |
1000 | if (dentptr->name[0] == DELETED_FLAG) { |
1001 | dentptr++; | |
1002 | continue; | |
1003 | } | |
ff04f6d1 | 1004 | |
cb940c7e RG |
1005 | if (vfat_enabled) |
1006 | csum = mkcksum(dentptr->name, dentptr->ext); | |
1007 | ||
ff04f6d1 | 1008 | if (dentptr->attr & ATTR_VOLUME) { |
cb940c7e RG |
1009 | if (vfat_enabled && |
1010 | (dentptr->attr & ATTR_VFAT) == ATTR_VFAT && | |
7385c28e WD |
1011 | (dentptr->name[0] & LAST_LONG_ENTRY_MASK)) { |
1012 | prevcksum = | |
1013 | ((dir_slot *)dentptr)->alias_checksum; | |
1014 | ||
3831530d | 1015 | get_vfatname(mydata, |
40e21916 | 1016 | root_cluster, |
64f65e1e | 1017 | dir_ptr, |
7385c28e WD |
1018 | dentptr, l_name); |
1019 | ||
1020 | if (dols == LS_ROOT) { | |
1021 | char dirc; | |
1022 | int doit = 0; | |
1023 | int isdir = | |
1024 | (dentptr->attr & ATTR_DIR); | |
1025 | ||
1026 | if (isdir) { | |
1027 | dirs++; | |
1028 | dirc = '/'; | |
1029 | doit = 1; | |
1030 | } else { | |
1031 | dirc = ' '; | |
1032 | if (l_name[0] != 0) { | |
1033 | files++; | |
1034 | doit = 1; | |
1035 | } | |
1036 | } | |
1037 | if (doit) { | |
1038 | if (dirc == ' ') { | |
1ad0b98a SR |
1039 | printf(" %8u %s%c\n", |
1040 | FAT2CPU32(dentptr->size), | |
7385c28e WD |
1041 | l_name, |
1042 | dirc); | |
1043 | } else { | |
1044 | printf(" %s%c\n", | |
1045 | l_name, | |
1046 | dirc); | |
1047 | } | |
1048 | } | |
1049 | dentptr++; | |
1050 | continue; | |
1051 | } | |
1052 | debug("Rootvfatname: |%s|\n", | |
1053 | l_name); | |
cb940c7e | 1054 | } else { |
7385c28e WD |
1055 | /* Volume label or VFAT entry */ |
1056 | dentptr++; | |
1057 | continue; | |
1058 | } | |
1059 | } else if (dentptr->name[0] == 0) { | |
1060 | debug("RootDentname == NULL - %d\n", i); | |
1061 | if (dols == LS_ROOT) { | |
1062 | printf("\n%d file(s), %d dir(s)\n\n", | |
1063 | files, dirs); | |
ac497771 | 1064 | ret = 0; |
7385c28e | 1065 | } |
ac497771 | 1066 | goto exit; |
71f95118 | 1067 | } |
cb940c7e RG |
1068 | else if (vfat_enabled && |
1069 | dols == LS_ROOT && csum == prevcksum) { | |
bf34e7d9 | 1070 | prevcksum = 0xffff; |
7385c28e WD |
1071 | dentptr++; |
1072 | continue; | |
71f95118 | 1073 | } |
cb940c7e | 1074 | |
7385c28e WD |
1075 | get_name(dentptr, s_name); |
1076 | ||
1077 | if (dols == LS_ROOT) { | |
1078 | int isdir = (dentptr->attr & ATTR_DIR); | |
1079 | char dirc; | |
1080 | int doit = 0; | |
1081 | ||
1082 | if (isdir) { | |
1083 | dirc = '/'; | |
1084 | if (s_name[0] != 0) { | |
1085 | dirs++; | |
1086 | doit = 1; | |
1087 | } | |
1088 | } else { | |
1089 | dirc = ' '; | |
1090 | if (s_name[0] != 0) { | |
1091 | files++; | |
1092 | doit = 1; | |
1093 | } | |
1094 | } | |
1095 | if (doit) { | |
1096 | if (dirc == ' ') { | |
1ad0b98a SR |
1097 | printf(" %8u %s%c\n", |
1098 | FAT2CPU32(dentptr->size), | |
7385c28e WD |
1099 | s_name, dirc); |
1100 | } else { | |
1101 | printf(" %s%c\n", | |
1102 | s_name, dirc); | |
1103 | } | |
1104 | } | |
1105 | dentptr++; | |
1106 | continue; | |
1107 | } | |
1108 | ||
1109 | if (strcmp(fnamecopy, s_name) | |
1110 | && strcmp(fnamecopy, l_name)) { | |
1111 | debug("RootMismatch: |%s|%s|\n", s_name, | |
1112 | l_name); | |
1113 | dentptr++; | |
1114 | continue; | |
1115 | } | |
1116 | ||
1117 | if (isdir && !(dentptr->attr & ATTR_DIR)) | |
ac497771 | 1118 | goto exit; |
7385c28e WD |
1119 | |
1120 | debug("RootName: %s", s_name); | |
1121 | debug(", start: 0x%x", START(dentptr)); | |
1122 | debug(", size: 0x%x %s\n", | |
1123 | FAT2CPU32(dentptr->size), | |
1124 | isdir ? "(DIR)" : ""); | |
1125 | ||
1126 | goto rootdir_done; /* We got a match */ | |
71f95118 | 1127 | } |
64f65e1e | 1128 | debug("END LOOP: buffer_blk_cnt=%d clust_size=%d\n", buffer_blk_cnt, |
7385c28e WD |
1129 | mydata->clust_size); |
1130 | ||
1131 | /* | |
1132 | * On FAT32 we must fetch the FAT entries for the next | |
1133 | * root directory clusters when a cluster has been | |
1134 | * completely processed. | |
1135 | */ | |
64f65e1e | 1136 | ++buffer_blk_cnt; |
cd1b042c BT |
1137 | int rootdir_end = 0; |
1138 | if (mydata->fatsize == 32) { | |
64f65e1e | 1139 | if (buffer_blk_cnt == mydata->clust_size) { |
cd1b042c BT |
1140 | int nxtsect = 0; |
1141 | int nxt_clust = 0; | |
7385c28e | 1142 | |
cd1b042c BT |
1143 | nxt_clust = get_fatent(mydata, root_cluster); |
1144 | rootdir_end = CHECK_CLUST(nxt_clust, 32); | |
7385c28e | 1145 | |
cd1b042c BT |
1146 | nxtsect = mydata->data_begin + |
1147 | (nxt_clust * mydata->clust_size); | |
7385c28e | 1148 | |
cd1b042c | 1149 | root_cluster = nxt_clust; |
7385c28e | 1150 | |
cd1b042c | 1151 | cursect = nxtsect; |
64f65e1e | 1152 | buffer_blk_cnt = 0; |
cd1b042c | 1153 | } |
71f95118 | 1154 | } else { |
64f65e1e PM |
1155 | if (buffer_blk_cnt == PREFETCH_BLOCKS) |
1156 | buffer_blk_cnt = 0; | |
cd1b042c BT |
1157 | |
1158 | rootdir_end = (++cursect - mydata->rootdir_sect >= | |
1159 | rootdir_size); | |
71f95118 | 1160 | } |
3f270f42 EH |
1161 | |
1162 | /* If end of rootdir reached */ | |
cd1b042c | 1163 | if (rootdir_end) { |
3f270f42 EH |
1164 | if (dols == LS_ROOT) { |
1165 | printf("\n%d file(s), %d dir(s)\n\n", | |
1166 | files, dirs); | |
1ad0b98a | 1167 | *size = 0; |
3f270f42 | 1168 | } |
ac497771 | 1169 | goto exit; |
3f270f42 | 1170 | } |
7385c28e WD |
1171 | } |
1172 | rootdir_done: | |
71f95118 | 1173 | |
7385c28e | 1174 | firsttime = 1; |
71f95118 | 1175 | |
7385c28e WD |
1176 | while (isdir) { |
1177 | int startsect = mydata->data_begin | |
1178 | + START(dentptr) * mydata->clust_size; | |
1179 | dir_entry dent; | |
1180 | char *nextname = NULL; | |
71f95118 | 1181 | |
7385c28e WD |
1182 | dent = *dentptr; |
1183 | dentptr = &dent; | |
71f95118 | 1184 | |
7385c28e WD |
1185 | idx = dirdelim(subname); |
1186 | ||
1187 | if (idx >= 0) { | |
1188 | subname[idx] = '\0'; | |
1189 | nextname = subname + idx + 1; | |
1190 | /* Handle multiple delimiters */ | |
1191 | while (ISDIRDELIM(*nextname)) | |
1192 | nextname++; | |
1193 | if (dols && *nextname == '\0') | |
1194 | firsttime = 0; | |
1195 | } else { | |
1196 | if (dols && firsttime) { | |
1197 | firsttime = 0; | |
1198 | } else { | |
1199 | isdir = 0; | |
1200 | } | |
1201 | } | |
1202 | ||
1203 | if (get_dentfromdir(mydata, startsect, subname, dentptr, | |
1204 | isdir ? 0 : dols) == NULL) { | |
1205 | if (dols && !isdir) | |
1ad0b98a | 1206 | *size = 0; |
ac497771 | 1207 | goto exit; |
7385c28e WD |
1208 | } |
1209 | ||
7ee46ceb BT |
1210 | if (isdir && !(dentptr->attr & ATTR_DIR)) |
1211 | goto exit; | |
1212 | ||
18a10d46 SW |
1213 | /* |
1214 | * If we are looking for a directory, and found a directory | |
1215 | * type entry, and the entry is for the root directory (as | |
1216 | * denoted by a cluster number of 0), jump back to the start | |
1217 | * of the function, since at least on FAT12/16, the root dir | |
1218 | * lives in a hard-coded location and needs special handling | |
1219 | * to parse, rather than simply following the cluster linked | |
1220 | * list in the FAT, like other directories. | |
1221 | */ | |
1222 | if (isdir && (dentptr->attr & ATTR_DIR) && !START(dentptr)) { | |
1223 | /* | |
1224 | * Modify the filename to remove the prefix that gets | |
1225 | * back to the root directory, so the initial root dir | |
1226 | * parsing code can continue from where we are without | |
1227 | * confusion. | |
1228 | */ | |
1229 | strcpy(fnamecopy, nextname ?: ""); | |
1230 | /* | |
1231 | * Set up state the same way as the function does when | |
1232 | * first started. This is required for the root dir | |
1233 | * parsing code operates in its expected environment. | |
1234 | */ | |
1235 | subname = ""; | |
1236 | cursect = mydata->rootdir_sect; | |
1237 | isdir = 0; | |
1238 | goto root_reparse; | |
1239 | } | |
1240 | ||
7ee46ceb | 1241 | if (idx >= 0) |
7385c28e | 1242 | subname = nextname; |
71f95118 | 1243 | } |
71f95118 | 1244 | |
1ad0b98a SR |
1245 | if (dogetsize) { |
1246 | *size = FAT2CPU32(dentptr->size); | |
1247 | ret = 0; | |
1248 | } else { | |
1249 | ret = get_contents(mydata, dentptr, pos, buffer, maxsize, size); | |
1250 | } | |
1251 | debug("Size: %u, got: %llu\n", FAT2CPU32(dentptr->size), *size); | |
71f95118 | 1252 | |
ac497771 SS |
1253 | exit: |
1254 | free(mydata->fatbuf); | |
7385c28e WD |
1255 | return ret; |
1256 | } | |
71f95118 | 1257 | |
1ad0b98a SR |
1258 | int do_fat_read(const char *filename, void *buffer, loff_t maxsize, int dols, |
1259 | loff_t *actread) | |
1170e634 | 1260 | { |
1ad0b98a | 1261 | return do_fat_read_at(filename, 0, buffer, maxsize, dols, 0, actread); |
1170e634 BT |
1262 | } |
1263 | ||
9795e07b | 1264 | int file_fat_detectfs(void) |
71f95118 | 1265 | { |
7385c28e WD |
1266 | boot_sector bs; |
1267 | volume_info volinfo; | |
1268 | int fatsize; | |
1269 | char vol_label[12]; | |
71f95118 | 1270 | |
7385c28e | 1271 | if (cur_dev == NULL) { |
7205e407 WD |
1272 | printf("No current device\n"); |
1273 | return 1; | |
1274 | } | |
7385c28e | 1275 | |
dd60d122 | 1276 | #if defined(CONFIG_CMD_IDE) || \ |
8c5170a7 | 1277 | defined(CONFIG_CMD_SATA) || \ |
c649e3c9 | 1278 | defined(CONFIG_SCSI) || \ |
dd60d122 | 1279 | defined(CONFIG_CMD_USB) || \ |
21f6f963 | 1280 | defined(CONFIG_MMC) |
7205e407 | 1281 | printf("Interface: "); |
7385c28e WD |
1282 | switch (cur_dev->if_type) { |
1283 | case IF_TYPE_IDE: | |
1284 | printf("IDE"); | |
1285 | break; | |
1286 | case IF_TYPE_SATA: | |
1287 | printf("SATA"); | |
1288 | break; | |
1289 | case IF_TYPE_SCSI: | |
1290 | printf("SCSI"); | |
1291 | break; | |
1292 | case IF_TYPE_ATAPI: | |
1293 | printf("ATAPI"); | |
1294 | break; | |
1295 | case IF_TYPE_USB: | |
1296 | printf("USB"); | |
1297 | break; | |
1298 | case IF_TYPE_DOC: | |
1299 | printf("DOC"); | |
1300 | break; | |
1301 | case IF_TYPE_MMC: | |
1302 | printf("MMC"); | |
1303 | break; | |
1304 | default: | |
1305 | printf("Unknown"); | |
7205e407 | 1306 | } |
7385c28e | 1307 | |
bcce53d0 | 1308 | printf("\n Device %d: ", cur_dev->devnum); |
7205e407 WD |
1309 | dev_print(cur_dev); |
1310 | #endif | |
7385c28e WD |
1311 | |
1312 | if (read_bootsectandvi(&bs, &volinfo, &fatsize)) { | |
7205e407 WD |
1313 | printf("\nNo valid FAT fs found\n"); |
1314 | return 1; | |
1315 | } | |
7385c28e WD |
1316 | |
1317 | memcpy(vol_label, volinfo.volume_label, 11); | |
7205e407 | 1318 | vol_label[11] = '\0'; |
7385c28e WD |
1319 | volinfo.fs_type[5] = '\0'; |
1320 | ||
461f86e6 | 1321 | printf("Filesystem: %s \"%s\"\n", volinfo.fs_type, vol_label); |
7385c28e | 1322 | |
7205e407 | 1323 | return 0; |
71f95118 WD |
1324 | } |
1325 | ||
9795e07b | 1326 | int file_fat_ls(const char *dir) |
71f95118 | 1327 | { |
1ad0b98a SR |
1328 | loff_t size; |
1329 | ||
1330 | return do_fat_read(dir, NULL, 0, LS_YES, &size); | |
71f95118 WD |
1331 | } |
1332 | ||
b7b5f319 SW |
1333 | int fat_exists(const char *filename) |
1334 | { | |
1ad0b98a SR |
1335 | int ret; |
1336 | loff_t size; | |
1337 | ||
1338 | ret = do_fat_read_at(filename, 0, NULL, 0, LS_NO, 1, &size); | |
1339 | return ret == 0; | |
b7b5f319 SW |
1340 | } |
1341 | ||
d455d878 | 1342 | int fat_size(const char *filename, loff_t *size) |
cf659819 | 1343 | { |
d455d878 | 1344 | return do_fat_read_at(filename, 0, NULL, 0, LS_NO, 1, size); |
cf659819 SW |
1345 | } |
1346 | ||
1ad0b98a SR |
1347 | int file_fat_read_at(const char *filename, loff_t pos, void *buffer, |
1348 | loff_t maxsize, loff_t *actread) | |
71f95118 | 1349 | { |
7385c28e | 1350 | printf("reading %s\n", filename); |
1ad0b98a SR |
1351 | return do_fat_read_at(filename, pos, buffer, maxsize, LS_NO, 0, |
1352 | actread); | |
1170e634 BT |
1353 | } |
1354 | ||
1ad0b98a | 1355 | int file_fat_read(const char *filename, void *buffer, int maxsize) |
1170e634 | 1356 | { |
1ad0b98a SR |
1357 | loff_t actread; |
1358 | int ret; | |
1359 | ||
1360 | ret = file_fat_read_at(filename, 0, buffer, maxsize, &actread); | |
1361 | if (ret) | |
1362 | return ret; | |
1363 | else | |
1364 | return actread; | |
71f95118 | 1365 | } |
e6d52415 | 1366 | |
d455d878 SR |
1367 | int fat_read_file(const char *filename, void *buf, loff_t offset, loff_t len, |
1368 | loff_t *actread) | |
e6d52415 | 1369 | { |
1ad0b98a | 1370 | int ret; |
e6d52415 | 1371 | |
d455d878 SR |
1372 | ret = file_fat_read_at(filename, offset, buf, len, actread); |
1373 | if (ret) | |
e6d52415 | 1374 | printf("** Unable to read file %s **\n", filename); |
e6d52415 | 1375 | |
d455d878 | 1376 | return ret; |
e6d52415 SG |
1377 | } |
1378 | ||
1379 | void fat_close(void) | |
1380 | { | |
1381 | } |