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Commit | Line | Data |
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83d290c5 | 1 | // SPDX-License-Identifier: GPL-2.0+ |
71f95118 WD |
2 | /* |
3 | * fat.c | |
4 | * | |
5 | * R/O (V)FAT 12/16/32 filesystem implementation by Marcus Sundberg | |
6 | * | |
7 | * 2002-07-28 - rjones@nexus-tech.net - ported to ppcboot v1.1.6 | |
8 | * 2003-03-10 - kharris@nexus-tech.net - ported to uboot | |
71f95118 WD |
9 | */ |
10 | ||
11 | #include <common.h> | |
2a981dc2 | 12 | #include <blk.h> |
71f95118 | 13 | #include <config.h> |
ac497771 | 14 | #include <exports.h> |
71f95118 | 15 | #include <fat.h> |
1f40366b | 16 | #include <fs.h> |
71f95118 | 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 | |
71f95118 | 24 | /* |
21a24c3b RC |
25 | * Convert a string to lowercase. Converts at most 'len' characters, |
26 | * 'len' may be larger than the length of 'str' if 'str' is NULL | |
27 | * terminated. | |
71f95118 | 28 | */ |
21a24c3b | 29 | static void downcase(char *str, size_t len) |
71f95118 | 30 | { |
21a24c3b | 31 | while (*str != '\0' && len--) { |
fb7e16cc | 32 | *str = tolower(*str); |
71f95118 WD |
33 | str++; |
34 | } | |
35 | } | |
36 | ||
4101f687 | 37 | static struct blk_desc *cur_dev; |
9813b750 | 38 | static disk_partition_t cur_part_info; |
7385c28e | 39 | |
9813b750 | 40 | #define DOS_BOOT_MAGIC_OFFSET 0x1fe |
7205e407 | 41 | #define DOS_FS_TYPE_OFFSET 0x36 |
66c2d73c | 42 | #define DOS_FS32_TYPE_OFFSET 0x52 |
71f95118 | 43 | |
9813b750 | 44 | static int disk_read(__u32 block, __u32 nr_blocks, void *buf) |
71f95118 | 45 | { |
0a04ed86 ŁM |
46 | ulong ret; |
47 | ||
2a981dc2 | 48 | if (!cur_dev) |
7205e407 | 49 | return -1; |
7385c28e | 50 | |
2a981dc2 | 51 | ret = blk_dread(cur_dev, cur_part_info.start + block, nr_blocks, buf); |
0a04ed86 | 52 | |
42a9f147 | 53 | if (ret != nr_blocks) |
0a04ed86 ŁM |
54 | return -1; |
55 | ||
56 | return ret; | |
71f95118 WD |
57 | } |
58 | ||
4101f687 | 59 | int fat_set_blk_dev(struct blk_desc *dev_desc, disk_partition_t *info) |
71f95118 | 60 | { |
9a800ac7 | 61 | ALLOC_CACHE_ALIGN_BUFFER(unsigned char, buffer, dev_desc->blksz); |
7205e407 | 62 | |
5e8f9831 SW |
63 | cur_dev = dev_desc; |
64 | cur_part_info = *info; | |
9813b750 KM |
65 | |
66 | /* Make sure it has a valid FAT header */ | |
67 | if (disk_read(0, 1, buffer) != 1) { | |
68 | cur_dev = NULL; | |
69 | return -1; | |
bf1060ea | 70 | } |
9813b750 KM |
71 | |
72 | /* Check if it's actually a DOS volume */ | |
73 | if (memcmp(buffer + DOS_BOOT_MAGIC_OFFSET, "\x55\xAA", 2)) { | |
74 | cur_dev = NULL; | |
75 | return -1; | |
76 | } | |
77 | ||
78 | /* Check for FAT12/FAT16/FAT32 filesystem */ | |
79 | if (!memcmp(buffer + DOS_FS_TYPE_OFFSET, "FAT", 3)) | |
80 | return 0; | |
81 | if (!memcmp(buffer + DOS_FS32_TYPE_OFFSET, "FAT32", 5)) | |
82 | return 0; | |
83 | ||
84 | cur_dev = NULL; | |
85 | return -1; | |
71f95118 WD |
86 | } |
87 | ||
4101f687 | 88 | int fat_register_device(struct blk_desc *dev_desc, int part_no) |
5e8f9831 SW |
89 | { |
90 | disk_partition_t info; | |
91 | ||
92 | /* First close any currently found FAT filesystem */ | |
93 | cur_dev = NULL; | |
94 | ||
95 | /* Read the partition table, if present */ | |
3e8bd469 | 96 | if (part_get_info(dev_desc, part_no, &info)) { |
5e8f9831 SW |
97 | if (part_no != 0) { |
98 | printf("** Partition %d not valid on device %d **\n", | |
bcce53d0 | 99 | part_no, dev_desc->devnum); |
5e8f9831 SW |
100 | return -1; |
101 | } | |
102 | ||
103 | info.start = 0; | |
104 | info.size = dev_desc->lba; | |
105 | info.blksz = dev_desc->blksz; | |
106 | info.name[0] = 0; | |
107 | info.type[0] = 0; | |
108 | info.bootable = 0; | |
b331cd62 | 109 | #if CONFIG_IS_ENABLED(PARTITION_UUIDS) |
5e8f9831 SW |
110 | info.uuid[0] = 0; |
111 | #endif | |
112 | } | |
113 | ||
114 | return fat_set_blk_dev(dev_desc, &info); | |
115 | } | |
9813b750 | 116 | |
71f95118 WD |
117 | /* |
118 | * Extract zero terminated short name from a directory entry. | |
119 | */ | |
9795e07b | 120 | static void get_name(dir_entry *dirent, char *s_name) |
71f95118 WD |
121 | { |
122 | char *ptr; | |
123 | ||
7385c28e | 124 | memcpy(s_name, dirent->name, 8); |
71f95118 WD |
125 | s_name[8] = '\0'; |
126 | ptr = s_name; | |
127 | while (*ptr && *ptr != ' ') | |
128 | ptr++; | |
21a24c3b RC |
129 | if (dirent->lcase & CASE_LOWER_BASE) |
130 | downcase(s_name, (unsigned)(ptr - s_name)); | |
71f95118 | 131 | if (dirent->ext[0] && dirent->ext[0] != ' ') { |
21a24c3b | 132 | *ptr++ = '.'; |
7385c28e | 133 | memcpy(ptr, dirent->ext, 3); |
21a24c3b RC |
134 | if (dirent->lcase & CASE_LOWER_EXT) |
135 | downcase(ptr, 3); | |
71f95118 WD |
136 | ptr[3] = '\0'; |
137 | while (*ptr && *ptr != ' ') | |
138 | ptr++; | |
139 | } | |
140 | *ptr = '\0'; | |
141 | if (*s_name == DELETED_FLAG) | |
142 | *s_name = '\0'; | |
143 | else if (*s_name == aRING) | |
3c2c2f42 | 144 | *s_name = DELETED_FLAG; |
71f95118 WD |
145 | } |
146 | ||
b8948d2a | 147 | static int flush_dirty_fat_buffer(fsdata *mydata); |
d8c3ea99 TFC |
148 | |
149 | #if !CONFIG_IS_ENABLED(FAT_WRITE) | |
b8948d2a SB |
150 | /* Stub for read only operation */ |
151 | int flush_dirty_fat_buffer(fsdata *mydata) | |
152 | { | |
153 | (void)(mydata); | |
154 | return 0; | |
155 | } | |
156 | #endif | |
157 | ||
71f95118 WD |
158 | /* |
159 | * Get the entry at index 'entry' in a FAT (12/16/32) table. | |
160 | * On failure 0x00 is returned. | |
161 | */ | |
9795e07b | 162 | static __u32 get_fatent(fsdata *mydata, __u32 entry) |
71f95118 WD |
163 | { |
164 | __u32 bufnum; | |
b352caea | 165 | __u32 offset, off8; |
71f95118 WD |
166 | __u32 ret = 0x00; |
167 | ||
b8948d2a SB |
168 | if (CHECK_CLUST(entry, mydata->fatsize)) { |
169 | printf("Error: Invalid FAT entry: 0x%08x\n", entry); | |
170 | return ret; | |
171 | } | |
172 | ||
71f95118 WD |
173 | switch (mydata->fatsize) { |
174 | case 32: | |
175 | bufnum = entry / FAT32BUFSIZE; | |
176 | offset = entry - bufnum * FAT32BUFSIZE; | |
177 | break; | |
178 | case 16: | |
179 | bufnum = entry / FAT16BUFSIZE; | |
180 | offset = entry - bufnum * FAT16BUFSIZE; | |
181 | break; | |
182 | case 12: | |
183 | bufnum = entry / FAT12BUFSIZE; | |
184 | offset = entry - bufnum * FAT12BUFSIZE; | |
185 | break; | |
186 | ||
187 | default: | |
188 | /* Unsupported FAT size */ | |
189 | return ret; | |
190 | } | |
191 | ||
b8948d2a | 192 | debug("FAT%d: entry: 0x%08x = %d, offset: 0x%04x = %d\n", |
7385c28e | 193 | mydata->fatsize, entry, entry, offset, offset); |
2aa98c66 | 194 | |
71f95118 WD |
195 | /* Read a new block of FAT entries into the cache. */ |
196 | if (bufnum != mydata->fatbufnum) { | |
60b36f0f | 197 | __u32 getsize = FATBUFBLOCKS; |
71f95118 WD |
198 | __u8 *bufptr = mydata->fatbuf; |
199 | __u32 fatlength = mydata->fatlength; | |
200 | __u32 startblock = bufnum * FATBUFBLOCKS; | |
201 | ||
6c1a8080 | 202 | /* Cap length if fatlength is not a multiple of FATBUFBLOCKS */ |
8006dd2e BT |
203 | if (startblock + getsize > fatlength) |
204 | getsize = fatlength - startblock; | |
60b36f0f | 205 | |
71f95118 WD |
206 | startblock += mydata->fat_sect; /* Offset from start of disk */ |
207 | ||
b8948d2a SB |
208 | /* Write back the fatbuf to the disk */ |
209 | if (flush_dirty_fat_buffer(mydata) < 0) | |
210 | return -1; | |
211 | ||
71f95118 | 212 | if (disk_read(startblock, getsize, bufptr) < 0) { |
7385c28e | 213 | debug("Error reading FAT blocks\n"); |
71f95118 WD |
214 | return ret; |
215 | } | |
216 | mydata->fatbufnum = bufnum; | |
217 | } | |
218 | ||
219 | /* Get the actual entry from the table */ | |
220 | switch (mydata->fatsize) { | |
221 | case 32: | |
7385c28e | 222 | ret = FAT2CPU32(((__u32 *) mydata->fatbuf)[offset]); |
71f95118 WD |
223 | break; |
224 | case 16: | |
7385c28e | 225 | ret = FAT2CPU16(((__u16 *) mydata->fatbuf)[offset]); |
71f95118 | 226 | break; |
7385c28e | 227 | case 12: |
b352caea SB |
228 | off8 = (offset * 3) / 2; |
229 | /* fatbut + off8 may be unaligned, read in byte granularity */ | |
230 | ret = mydata->fatbuf[off8] + (mydata->fatbuf[off8 + 1] << 8); | |
8d48c92b SB |
231 | |
232 | if (offset & 0x1) | |
233 | ret >>= 4; | |
234 | ret &= 0xfff; | |
71f95118 | 235 | } |
b8948d2a SB |
236 | debug("FAT%d: ret: 0x%08x, entry: 0x%08x, offset: 0x%04x\n", |
237 | mydata->fatsize, ret, entry, offset); | |
71f95118 WD |
238 | |
239 | return ret; | |
240 | } | |
241 | ||
71f95118 WD |
242 | /* |
243 | * Read at most 'size' bytes from the specified cluster into 'buffer'. | |
244 | * Return 0 on success, -1 otherwise. | |
245 | */ | |
246 | static int | |
9795e07b | 247 | get_cluster(fsdata *mydata, __u32 clustnum, __u8 *buffer, unsigned long size) |
71f95118 | 248 | { |
3f270f42 | 249 | __u32 idx = 0; |
71f95118 | 250 | __u32 startsect; |
46236b14 | 251 | int ret; |
71f95118 WD |
252 | |
253 | if (clustnum > 0) { | |
265edc03 | 254 | startsect = clust_to_sect(mydata, clustnum); |
71f95118 WD |
255 | } else { |
256 | startsect = mydata->rootdir_sect; | |
257 | } | |
258 | ||
7385c28e WD |
259 | debug("gc - clustnum: %d, startsect: %d\n", clustnum, startsect); |
260 | ||
cc63b25e | 261 | if ((unsigned long)buffer & (ARCH_DMA_MINALIGN - 1)) { |
9a800ac7 | 262 | ALLOC_CACHE_ALIGN_BUFFER(__u8, tmpbuf, mydata->sect_size); |
7385c28e | 263 | |
1c381ceb | 264 | debug("FAT: Misaligned buffer address (%p)\n", buffer); |
cc63b25e BT |
265 | |
266 | while (size >= mydata->sect_size) { | |
267 | ret = disk_read(startsect++, 1, tmpbuf); | |
268 | if (ret != 1) { | |
269 | debug("Error reading data (got %d)\n", ret); | |
270 | return -1; | |
271 | } | |
272 | ||
273 | memcpy(buffer, tmpbuf, mydata->sect_size); | |
274 | buffer += mydata->sect_size; | |
275 | size -= mydata->sect_size; | |
276 | } | |
277 | } else { | |
ac497771 | 278 | idx = size / mydata->sect_size; |
cc63b25e BT |
279 | ret = disk_read(startsect, idx, buffer); |
280 | if (ret != idx) { | |
281 | debug("Error reading data (got %d)\n", ret); | |
282 | return -1; | |
283 | } | |
284 | startsect += idx; | |
285 | idx *= mydata->sect_size; | |
286 | buffer += idx; | |
287 | size -= idx; | |
288 | } | |
289 | if (size) { | |
290 | ALLOC_CACHE_ALIGN_BUFFER(__u8, tmpbuf, mydata->sect_size); | |
291 | ||
292 | ret = disk_read(startsect, 1, tmpbuf); | |
46236b14 KM |
293 | if (ret != 1) { |
294 | debug("Error reading data (got %d)\n", ret); | |
7205e407 | 295 | return -1; |
71f95118 | 296 | } |
7205e407 | 297 | |
cc63b25e | 298 | memcpy(buffer, tmpbuf, size); |
71f95118 WD |
299 | } |
300 | ||
301 | return 0; | |
302 | } | |
303 | ||
71f95118 | 304 | /* |
1170e634 | 305 | * Read at most 'maxsize' bytes from 'pos' in the file associated with 'dentptr' |
71f95118 | 306 | * into 'buffer'. |
1ad0b98a | 307 | * Update the number of bytes read in *gotsize or return -1 on fatal errors. |
71f95118 | 308 | */ |
1ad0b98a SR |
309 | static int get_contents(fsdata *mydata, dir_entry *dentptr, loff_t pos, |
310 | __u8 *buffer, loff_t maxsize, loff_t *gotsize) | |
71f95118 | 311 | { |
1ad0b98a | 312 | loff_t filesize = FAT2CPU32(dentptr->size); |
ac497771 | 313 | unsigned int bytesperclust = mydata->clust_size * mydata->sect_size; |
71f95118 | 314 | __u32 curclust = START(dentptr); |
7205e407 | 315 | __u32 endclust, newclust; |
1ad0b98a | 316 | loff_t actsize; |
71f95118 | 317 | |
1ad0b98a SR |
318 | *gotsize = 0; |
319 | debug("Filesize: %llu bytes\n", filesize); | |
71f95118 | 320 | |
1170e634 | 321 | if (pos >= filesize) { |
1ad0b98a SR |
322 | debug("Read position past EOF: %llu\n", pos); |
323 | return 0; | |
1170e634 BT |
324 | } |
325 | ||
326 | if (maxsize > 0 && filesize > pos + maxsize) | |
327 | filesize = pos + maxsize; | |
71f95118 | 328 | |
1ad0b98a | 329 | debug("%llu bytes\n", filesize); |
7385c28e | 330 | |
1170e634 BT |
331 | actsize = bytesperclust; |
332 | ||
333 | /* go to cluster at pos */ | |
334 | while (actsize <= pos) { | |
335 | curclust = get_fatent(mydata, curclust); | |
336 | if (CHECK_CLUST(curclust, mydata->fatsize)) { | |
337 | debug("curclust: 0x%x\n", curclust); | |
338 | debug("Invalid FAT entry\n"); | |
1ad0b98a | 339 | return 0; |
1170e634 BT |
340 | } |
341 | actsize += bytesperclust; | |
342 | } | |
343 | ||
344 | /* actsize > pos */ | |
345 | actsize -= bytesperclust; | |
346 | filesize -= actsize; | |
347 | pos -= actsize; | |
348 | ||
349 | /* align to beginning of next cluster if any */ | |
350 | if (pos) { | |
8537874a TFC |
351 | __u8 *tmp_buffer; |
352 | ||
1ad0b98a | 353 | actsize = min(filesize, (loff_t)bytesperclust); |
8537874a TFC |
354 | tmp_buffer = malloc_cache_aligned(actsize); |
355 | if (!tmp_buffer) { | |
356 | debug("Error: allocating buffer\n"); | |
357 | return -ENOMEM; | |
358 | } | |
359 | ||
360 | if (get_cluster(mydata, curclust, tmp_buffer, actsize) != 0) { | |
1170e634 | 361 | printf("Error reading cluster\n"); |
8537874a | 362 | free(tmp_buffer); |
1170e634 BT |
363 | return -1; |
364 | } | |
365 | filesize -= actsize; | |
366 | actsize -= pos; | |
8537874a TFC |
367 | memcpy(buffer, tmp_buffer + pos, actsize); |
368 | free(tmp_buffer); | |
1ad0b98a | 369 | *gotsize += actsize; |
1170e634 | 370 | if (!filesize) |
1ad0b98a | 371 | return 0; |
1170e634 BT |
372 | buffer += actsize; |
373 | ||
374 | curclust = get_fatent(mydata, curclust); | |
375 | if (CHECK_CLUST(curclust, mydata->fatsize)) { | |
376 | debug("curclust: 0x%x\n", curclust); | |
377 | debug("Invalid FAT entry\n"); | |
1ad0b98a | 378 | return 0; |
1170e634 BT |
379 | } |
380 | } | |
381 | ||
7385c28e WD |
382 | actsize = bytesperclust; |
383 | endclust = curclust; | |
71f95118 WD |
384 | |
385 | do { | |
7205e407 | 386 | /* search for consecutive clusters */ |
7385c28e | 387 | while (actsize < filesize) { |
7205e407 | 388 | newclust = get_fatent(mydata, endclust); |
7385c28e | 389 | if ((newclust - 1) != endclust) |
7205e407 | 390 | goto getit; |
8ce4e5c2 | 391 | if (CHECK_CLUST(newclust, mydata->fatsize)) { |
7385c28e WD |
392 | debug("curclust: 0x%x\n", newclust); |
393 | debug("Invalid FAT entry\n"); | |
1ad0b98a | 394 | return 0; |
7205e407 | 395 | } |
7385c28e WD |
396 | endclust = newclust; |
397 | actsize += bytesperclust; | |
7205e407 | 398 | } |
7385c28e | 399 | |
7205e407 | 400 | /* get remaining bytes */ |
7385c28e | 401 | actsize = filesize; |
0880e5bb | 402 | if (get_cluster(mydata, curclust, buffer, (int)actsize) != 0) { |
7385c28e | 403 | printf("Error reading cluster\n"); |
7205e407 WD |
404 | return -1; |
405 | } | |
1ad0b98a SR |
406 | *gotsize += actsize; |
407 | return 0; | |
7205e407 WD |
408 | getit: |
409 | if (get_cluster(mydata, curclust, buffer, (int)actsize) != 0) { | |
7385c28e | 410 | printf("Error reading cluster\n"); |
7205e407 WD |
411 | return -1; |
412 | } | |
1ad0b98a | 413 | *gotsize += (int)actsize; |
7205e407 WD |
414 | filesize -= actsize; |
415 | buffer += actsize; | |
7385c28e | 416 | |
7205e407 | 417 | curclust = get_fatent(mydata, endclust); |
8ce4e5c2 | 418 | if (CHECK_CLUST(curclust, mydata->fatsize)) { |
7385c28e WD |
419 | debug("curclust: 0x%x\n", curclust); |
420 | printf("Invalid FAT entry\n"); | |
1ad0b98a | 421 | return 0; |
71f95118 | 422 | } |
7385c28e WD |
423 | actsize = bytesperclust; |
424 | endclust = curclust; | |
71f95118 WD |
425 | } while (1); |
426 | } | |
427 | ||
71f95118 WD |
428 | /* |
429 | * Extract the file name information from 'slotptr' into 'l_name', | |
430 | * starting at l_name[*idx]. | |
431 | * Return 1 if terminator (zero byte) is found, 0 otherwise. | |
432 | */ | |
9795e07b | 433 | static int slot2str(dir_slot *slotptr, char *l_name, int *idx) |
71f95118 WD |
434 | { |
435 | int j; | |
436 | ||
437 | for (j = 0; j <= 8; j += 2) { | |
438 | l_name[*idx] = slotptr->name0_4[j]; | |
7385c28e WD |
439 | if (l_name[*idx] == 0x00) |
440 | return 1; | |
71f95118 WD |
441 | (*idx)++; |
442 | } | |
443 | for (j = 0; j <= 10; j += 2) { | |
444 | l_name[*idx] = slotptr->name5_10[j]; | |
7385c28e WD |
445 | if (l_name[*idx] == 0x00) |
446 | return 1; | |
71f95118 WD |
447 | (*idx)++; |
448 | } | |
449 | for (j = 0; j <= 2; j += 2) { | |
450 | l_name[*idx] = slotptr->name11_12[j]; | |
7385c28e WD |
451 | if (l_name[*idx] == 0x00) |
452 | return 1; | |
71f95118 WD |
453 | (*idx)++; |
454 | } | |
455 | ||
456 | return 0; | |
457 | } | |
458 | ||
71f95118 | 459 | /* Calculate short name checksum */ |
ff04f6d1 | 460 | static __u8 mkcksum(const char name[8], const char ext[3]) |
71f95118 WD |
461 | { |
462 | int i; | |
7385c28e | 463 | |
71f95118 WD |
464 | __u8 ret = 0; |
465 | ||
6ad77d88 | 466 | for (i = 0; i < 8; i++) |
ff04f6d1 | 467 | ret = (((ret & 1) << 7) | ((ret & 0xfe) >> 1)) + name[i]; |
6ad77d88 | 468 | for (i = 0; i < 3; i++) |
ff04f6d1 | 469 | ret = (((ret & 1) << 7) | ((ret & 0xfe) >> 1)) + ext[i]; |
71f95118 WD |
470 | |
471 | return ret; | |
472 | } | |
71f95118 | 473 | |
71f95118 WD |
474 | /* |
475 | * Read boot sector and volume info from a FAT filesystem | |
476 | */ | |
477 | static int | |
9795e07b | 478 | read_bootsectandvi(boot_sector *bs, volume_info *volinfo, int *fatsize) |
71f95118 | 479 | { |
ac497771 | 480 | __u8 *block; |
71f95118 | 481 | volume_info *vistart; |
ac497771 SS |
482 | int ret = 0; |
483 | ||
484 | if (cur_dev == NULL) { | |
485 | debug("Error: no device selected\n"); | |
486 | return -1; | |
487 | } | |
488 | ||
09fa964b | 489 | block = malloc_cache_aligned(cur_dev->blksz); |
ac497771 SS |
490 | if (block == NULL) { |
491 | debug("Error: allocating block\n"); | |
492 | return -1; | |
493 | } | |
71f95118 | 494 | |
9795e07b | 495 | if (disk_read(0, 1, block) < 0) { |
7385c28e | 496 | debug("Error: reading block\n"); |
ac497771 | 497 | goto fail; |
71f95118 WD |
498 | } |
499 | ||
500 | memcpy(bs, block, sizeof(boot_sector)); | |
7385c28e WD |
501 | bs->reserved = FAT2CPU16(bs->reserved); |
502 | bs->fat_length = FAT2CPU16(bs->fat_length); | |
503 | bs->secs_track = FAT2CPU16(bs->secs_track); | |
504 | bs->heads = FAT2CPU16(bs->heads); | |
505 | bs->total_sect = FAT2CPU32(bs->total_sect); | |
71f95118 WD |
506 | |
507 | /* FAT32 entries */ | |
508 | if (bs->fat_length == 0) { | |
509 | /* Assume FAT32 */ | |
510 | bs->fat32_length = FAT2CPU32(bs->fat32_length); | |
7385c28e | 511 | bs->flags = FAT2CPU16(bs->flags); |
71f95118 | 512 | bs->root_cluster = FAT2CPU32(bs->root_cluster); |
7385c28e WD |
513 | bs->info_sector = FAT2CPU16(bs->info_sector); |
514 | bs->backup_boot = FAT2CPU16(bs->backup_boot); | |
515 | vistart = (volume_info *)(block + sizeof(boot_sector)); | |
71f95118 WD |
516 | *fatsize = 32; |
517 | } else { | |
7385c28e | 518 | vistart = (volume_info *)&(bs->fat32_length); |
71f95118 WD |
519 | *fatsize = 0; |
520 | } | |
521 | memcpy(volinfo, vistart, sizeof(volume_info)); | |
522 | ||
71f95118 | 523 | if (*fatsize == 32) { |
7385c28e | 524 | if (strncmp(FAT32_SIGN, vistart->fs_type, SIGNLEN) == 0) |
ac497771 | 525 | goto exit; |
71f95118 | 526 | } else { |
651351fe | 527 | if (strncmp(FAT12_SIGN, vistart->fs_type, SIGNLEN) == 0) { |
71f95118 | 528 | *fatsize = 12; |
ac497771 | 529 | goto exit; |
71f95118 | 530 | } |
651351fe | 531 | if (strncmp(FAT16_SIGN, vistart->fs_type, SIGNLEN) == 0) { |
71f95118 | 532 | *fatsize = 16; |
ac497771 | 533 | goto exit; |
71f95118 WD |
534 | } |
535 | } | |
536 | ||
7385c28e | 537 | debug("Error: broken fs_type sign\n"); |
ac497771 SS |
538 | fail: |
539 | ret = -1; | |
540 | exit: | |
541 | free(block); | |
542 | return ret; | |
71f95118 WD |
543 | } |
544 | ||
45449980 | 545 | static int get_fs_info(fsdata *mydata) |
71f95118 | 546 | { |
7385c28e WD |
547 | boot_sector bs; |
548 | volume_info volinfo; | |
45449980 | 549 | int ret; |
7385c28e | 550 | |
45449980 RC |
551 | ret = read_bootsectandvi(&bs, &volinfo, &mydata->fatsize); |
552 | if (ret) { | |
7385c28e | 553 | debug("Error: reading boot sector\n"); |
45449980 | 554 | return ret; |
7385c28e WD |
555 | } |
556 | ||
40e21916 | 557 | if (mydata->fatsize == 32) { |
7385c28e | 558 | mydata->fatlength = bs.fat32_length; |
f23101f9 | 559 | mydata->total_sect = bs.total_sect; |
40e21916 | 560 | } else { |
7385c28e | 561 | mydata->fatlength = bs.fat_length; |
f23101f9 AT |
562 | mydata->total_sect = (bs.sectors[1] << 8) + bs.sectors[0]; |
563 | if (!mydata->total_sect) | |
564 | mydata->total_sect = bs.total_sect; | |
40e21916 | 565 | } |
f23101f9 AT |
566 | if (!mydata->total_sect) /* unlikely */ |
567 | mydata->total_sect = (u32)cur_part_info.size; | |
7385c28e | 568 | |
f23101f9 | 569 | mydata->fats = bs.fats; |
7385c28e WD |
570 | mydata->fat_sect = bs.reserved; |
571 | ||
45449980 | 572 | mydata->rootdir_sect = mydata->fat_sect + mydata->fatlength * bs.fats; |
7385c28e | 573 | |
ac497771 | 574 | mydata->sect_size = (bs.sector_size[1] << 8) + bs.sector_size[0]; |
7385c28e | 575 | mydata->clust_size = bs.cluster_size; |
46236b14 KM |
576 | if (mydata->sect_size != cur_part_info.blksz) { |
577 | printf("Error: FAT sector size mismatch (fs=%hu, dev=%lu)\n", | |
578 | mydata->sect_size, cur_part_info.blksz); | |
579 | return -1; | |
580 | } | |
cd80a4fe PW |
581 | if (mydata->clust_size == 0) { |
582 | printf("Error: FAT cluster size not set\n"); | |
583 | return -1; | |
584 | } | |
585 | if ((unsigned int)mydata->clust_size * mydata->sect_size > | |
586 | MAX_CLUSTSIZE) { | |
587 | printf("Error: FAT cluster size too big (cs=%u, max=%u)\n", | |
588 | (unsigned int)mydata->clust_size * mydata->sect_size, | |
589 | MAX_CLUSTSIZE); | |
590 | return -1; | |
591 | } | |
7385c28e WD |
592 | |
593 | if (mydata->fatsize == 32) { | |
594 | mydata->data_begin = mydata->rootdir_sect - | |
595 | (mydata->clust_size * 2); | |
c6e3baa5 | 596 | mydata->root_cluster = bs.root_cluster; |
7385c28e | 597 | } else { |
45449980 RC |
598 | mydata->rootdir_size = ((bs.dir_entries[1] * (int)256 + |
599 | bs.dir_entries[0]) * | |
600 | sizeof(dir_entry)) / | |
601 | mydata->sect_size; | |
7385c28e | 602 | mydata->data_begin = mydata->rootdir_sect + |
45449980 | 603 | mydata->rootdir_size - |
7385c28e | 604 | (mydata->clust_size * 2); |
9b18358d AH |
605 | |
606 | /* | |
607 | * The root directory is not cluster-aligned and may be on a | |
608 | * "negative" cluster, this will be handled specially in | |
609 | * next_cluster(). | |
610 | */ | |
611 | mydata->root_cluster = 0; | |
7385c28e WD |
612 | } |
613 | ||
614 | mydata->fatbufnum = -1; | |
3c0ed9c3 | 615 | mydata->fat_dirty = 0; |
09fa964b | 616 | mydata->fatbuf = malloc_cache_aligned(FATBUFSIZE); |
ac497771 SS |
617 | if (mydata->fatbuf == NULL) { |
618 | debug("Error: allocating memory\n"); | |
619 | return -1; | |
620 | } | |
71f95118 | 621 | |
7385c28e WD |
622 | debug("FAT%d, fat_sect: %d, fatlength: %d\n", |
623 | mydata->fatsize, mydata->fat_sect, mydata->fatlength); | |
624 | debug("Rootdir begins at cluster: %d, sector: %d, offset: %x\n" | |
625 | "Data begins at: %d\n", | |
c6e3baa5 | 626 | mydata->root_cluster, |
7385c28e | 627 | mydata->rootdir_sect, |
ac497771 SS |
628 | mydata->rootdir_sect * mydata->sect_size, mydata->data_begin); |
629 | debug("Sector size: %d, cluster size: %d\n", mydata->sect_size, | |
630 | mydata->clust_size); | |
7385c28e | 631 | |
45449980 RC |
632 | return 0; |
633 | } | |
634 | ||
c6e3baa5 RC |
635 | |
636 | /* | |
637 | * Directory iterator, to simplify filesystem traversal | |
638 | * | |
639 | * Implements an iterator pattern to traverse directory tables, | |
640 | * transparently handling directory tables split across multiple | |
641 | * clusters, and the difference between FAT12/FAT16 root directory | |
642 | * (contiguous) and subdirectories + FAT32 root (chained). | |
643 | * | |
644 | * Rough usage: | |
645 | * | |
646 | * for (fat_itr_root(&itr, fsdata); fat_itr_next(&itr); ) { | |
647 | * // to traverse down to a subdirectory pointed to by | |
648 | * // current iterator position: | |
649 | * fat_itr_child(&itr, &itr); | |
650 | * } | |
651 | * | |
652 | * For more complete example, see fat_itr_resolve() | |
653 | */ | |
654 | ||
655 | typedef struct { | |
656 | fsdata *fsdata; /* filesystem parameters */ | |
3a10e072 | 657 | unsigned start_clust; /* first cluster */ |
c6e3baa5 | 658 | unsigned clust; /* current cluster */ |
f528c140 | 659 | unsigned next_clust; /* next cluster if remaining == 0 */ |
c6e3baa5 RC |
660 | int last_cluster; /* set once we've read last cluster */ |
661 | int is_root; /* is iterator at root directory */ | |
662 | int remaining; /* remaining dent's in current cluster */ | |
663 | ||
664 | /* current iterator position values: */ | |
665 | dir_entry *dent; /* current directory entry */ | |
666 | char l_name[VFAT_MAXLEN_BYTES]; /* long (vfat) name */ | |
667 | char s_name[14]; /* short 8.3 name */ | |
668 | char *name; /* l_name if there is one, else s_name */ | |
669 | ||
670 | /* storage for current cluster in memory: */ | |
671 | u8 block[MAX_CLUSTSIZE] __aligned(ARCH_DMA_MINALIGN); | |
672 | } fat_itr; | |
673 | ||
674 | static int fat_itr_isdir(fat_itr *itr); | |
675 | ||
676 | /** | |
677 | * fat_itr_root() - initialize an iterator to start at the root | |
678 | * directory | |
679 | * | |
680 | * @itr: iterator to initialize | |
681 | * @fsdata: filesystem data for the partition | |
682 | * @return 0 on success, else -errno | |
683 | */ | |
684 | static int fat_itr_root(fat_itr *itr, fsdata *fsdata) | |
685 | { | |
686 | if (get_fs_info(fsdata)) | |
687 | return -ENXIO; | |
688 | ||
689 | itr->fsdata = fsdata; | |
3a10e072 | 690 | itr->start_clust = 0; |
c6e3baa5 | 691 | itr->clust = fsdata->root_cluster; |
f528c140 | 692 | itr->next_clust = fsdata->root_cluster; |
c6e3baa5 RC |
693 | itr->dent = NULL; |
694 | itr->remaining = 0; | |
695 | itr->last_cluster = 0; | |
696 | itr->is_root = 1; | |
697 | ||
698 | return 0; | |
699 | } | |
700 | ||
701 | /** | |
702 | * fat_itr_child() - initialize an iterator to descend into a sub- | |
703 | * directory | |
704 | * | |
705 | * Initializes 'itr' to iterate the contents of the directory at | |
706 | * the current cursor position of 'parent'. It is an error to | |
707 | * call this if the current cursor of 'parent' is pointing at a | |
708 | * regular file. | |
709 | * | |
710 | * Note that 'itr' and 'parent' can be the same pointer if you do | |
711 | * not need to preserve 'parent' after this call, which is useful | |
712 | * for traversing directory structure to resolve a file/directory. | |
713 | * | |
714 | * @itr: iterator to initialize | |
715 | * @parent: the iterator pointing at a directory entry in the | |
716 | * parent directory of the directory to iterate | |
717 | */ | |
718 | static void fat_itr_child(fat_itr *itr, fat_itr *parent) | |
719 | { | |
720 | fsdata *mydata = parent->fsdata; /* for silly macros */ | |
721 | unsigned clustnum = START(parent->dent); | |
722 | ||
723 | assert(fat_itr_isdir(parent)); | |
724 | ||
725 | itr->fsdata = parent->fsdata; | |
3a10e072 | 726 | itr->start_clust = clustnum; |
c6e3baa5 RC |
727 | if (clustnum > 0) { |
728 | itr->clust = clustnum; | |
f528c140 | 729 | itr->next_clust = clustnum; |
8df87314 | 730 | itr->is_root = 0; |
c6e3baa5 RC |
731 | } else { |
732 | itr->clust = parent->fsdata->root_cluster; | |
f528c140 | 733 | itr->next_clust = parent->fsdata->root_cluster; |
8df87314 | 734 | itr->is_root = 1; |
c6e3baa5 RC |
735 | } |
736 | itr->dent = NULL; | |
737 | itr->remaining = 0; | |
738 | itr->last_cluster = 0; | |
c6e3baa5 RC |
739 | } |
740 | ||
9b18358d | 741 | static void *next_cluster(fat_itr *itr, unsigned *nbytes) |
c6e3baa5 RC |
742 | { |
743 | fsdata *mydata = itr->fsdata; /* for silly macros */ | |
744 | int ret; | |
745 | u32 sect; | |
9b18358d | 746 | u32 read_size; |
c6e3baa5 RC |
747 | |
748 | /* have we reached the end? */ | |
749 | if (itr->last_cluster) | |
750 | return NULL; | |
751 | ||
9b18358d AH |
752 | if (itr->is_root && itr->fsdata->fatsize != 32) { |
753 | /* | |
754 | * The root directory is located before the data area and | |
755 | * cannot be indexed using the regular unsigned cluster | |
756 | * numbers (it may start at a "negative" cluster or not at a | |
757 | * cluster boundary at all), so consider itr->next_clust to be | |
758 | * a offset in cluster-sized units from the start of rootdir. | |
759 | */ | |
760 | unsigned sect_offset = itr->next_clust * itr->fsdata->clust_size; | |
761 | unsigned remaining_sects = itr->fsdata->rootdir_size - sect_offset; | |
762 | sect = itr->fsdata->rootdir_sect + sect_offset; | |
763 | /* do not read past the end of rootdir */ | |
764 | read_size = min_t(u32, itr->fsdata->clust_size, | |
765 | remaining_sects); | |
766 | } else { | |
767 | sect = clust_to_sect(itr->fsdata, itr->next_clust); | |
768 | read_size = itr->fsdata->clust_size; | |
769 | } | |
c6e3baa5 | 770 | |
9b18358d AH |
771 | debug("FAT read(sect=%d), clust_size=%d, read_size=%u, DIRENTSPERBLOCK=%zd\n", |
772 | sect, itr->fsdata->clust_size, read_size, DIRENTSPERBLOCK); | |
c6e3baa5 RC |
773 | |
774 | /* | |
775 | * NOTE: do_fat_read_at() had complicated logic to deal w/ | |
776 | * vfat names that span multiple clusters in the fat16 case, | |
777 | * which get_dentfromdir() probably also needed (and was | |
778 | * missing). And not entirely sure what fat32 didn't have | |
779 | * the same issue.. We solve that by only caring about one | |
780 | * dent at a time and iteratively constructing the vfat long | |
781 | * name. | |
782 | */ | |
9b18358d | 783 | ret = disk_read(sect, read_size, itr->block); |
c6e3baa5 RC |
784 | if (ret < 0) { |
785 | debug("Error: reading block\n"); | |
786 | return NULL; | |
787 | } | |
788 | ||
9b18358d | 789 | *nbytes = read_size * itr->fsdata->sect_size; |
f528c140 | 790 | itr->clust = itr->next_clust; |
c6e3baa5 | 791 | if (itr->is_root && itr->fsdata->fatsize != 32) { |
f528c140 | 792 | itr->next_clust++; |
9b18358d | 793 | if (itr->next_clust * itr->fsdata->clust_size >= |
c6e3baa5 | 794 | itr->fsdata->rootdir_size) { |
f528c140 | 795 | debug("nextclust: 0x%x\n", itr->next_clust); |
c6e3baa5 RC |
796 | itr->last_cluster = 1; |
797 | } | |
798 | } else { | |
f528c140 AT |
799 | itr->next_clust = get_fatent(itr->fsdata, itr->next_clust); |
800 | if (CHECK_CLUST(itr->next_clust, itr->fsdata->fatsize)) { | |
801 | debug("nextclust: 0x%x\n", itr->next_clust); | |
c6e3baa5 RC |
802 | itr->last_cluster = 1; |
803 | } | |
804 | } | |
805 | ||
806 | return itr->block; | |
807 | } | |
808 | ||
809 | static dir_entry *next_dent(fat_itr *itr) | |
810 | { | |
811 | if (itr->remaining == 0) { | |
9b18358d AH |
812 | unsigned nbytes; |
813 | struct dir_entry *dent = next_cluster(itr, &nbytes); | |
c6e3baa5 RC |
814 | |
815 | /* have we reached the last cluster? */ | |
f528c140 AT |
816 | if (!dent) { |
817 | /* a sign for no more entries left */ | |
818 | itr->dent = NULL; | |
c6e3baa5 | 819 | return NULL; |
f528c140 | 820 | } |
c6e3baa5 RC |
821 | |
822 | itr->remaining = nbytes / sizeof(dir_entry) - 1; | |
823 | itr->dent = dent; | |
824 | } else { | |
825 | itr->remaining--; | |
826 | itr->dent++; | |
827 | } | |
828 | ||
829 | /* have we reached the last valid entry? */ | |
830 | if (itr->dent->name[0] == 0) | |
831 | return NULL; | |
832 | ||
833 | return itr->dent; | |
834 | } | |
835 | ||
836 | static dir_entry *extract_vfat_name(fat_itr *itr) | |
837 | { | |
838 | struct dir_entry *dent = itr->dent; | |
839 | int seqn = itr->dent->name[0] & ~LAST_LONG_ENTRY_MASK; | |
840 | u8 chksum, alias_checksum = ((dir_slot *)dent)->alias_checksum; | |
841 | int n = 0; | |
842 | ||
843 | while (seqn--) { | |
844 | char buf[13]; | |
845 | int idx = 0; | |
846 | ||
847 | slot2str((dir_slot *)dent, buf, &idx); | |
848 | ||
8b021bb9 PW |
849 | if (n + idx >= sizeof(itr->l_name)) |
850 | return NULL; | |
851 | ||
c6e3baa5 RC |
852 | /* shift accumulated long-name up and copy new part in: */ |
853 | memmove(itr->l_name + idx, itr->l_name, n); | |
854 | memcpy(itr->l_name, buf, idx); | |
855 | n += idx; | |
856 | ||
857 | dent = next_dent(itr); | |
858 | if (!dent) | |
859 | return NULL; | |
860 | } | |
861 | ||
862 | itr->l_name[n] = '\0'; | |
863 | ||
864 | chksum = mkcksum(dent->name, dent->ext); | |
865 | ||
866 | /* checksum mismatch could mean deleted file, etc.. skip it: */ | |
867 | if (chksum != alias_checksum) { | |
868 | debug("** chksum=%x, alias_checksum=%x, l_name=%s, s_name=%8s.%3s\n", | |
869 | chksum, alias_checksum, itr->l_name, dent->name, dent->ext); | |
870 | return NULL; | |
871 | } | |
872 | ||
873 | return dent; | |
874 | } | |
875 | ||
876 | /** | |
877 | * fat_itr_next() - step to the next entry in a directory | |
878 | * | |
879 | * Must be called once on a new iterator before the cursor is valid. | |
880 | * | |
881 | * @itr: the iterator to iterate | |
882 | * @return boolean, 1 if success or 0 if no more entries in the | |
883 | * current directory | |
884 | */ | |
885 | static int fat_itr_next(fat_itr *itr) | |
886 | { | |
887 | dir_entry *dent; | |
888 | ||
889 | itr->name = NULL; | |
890 | ||
891 | while (1) { | |
892 | dent = next_dent(itr); | |
893 | if (!dent) | |
894 | return 0; | |
895 | ||
896 | if (dent->name[0] == DELETED_FLAG || | |
897 | dent->name[0] == aRING) | |
898 | continue; | |
899 | ||
900 | if (dent->attr & ATTR_VOLUME) { | |
8bad6cb1 | 901 | if ((dent->attr & ATTR_VFAT) == ATTR_VFAT && |
c6e3baa5 RC |
902 | (dent->name[0] & LAST_LONG_ENTRY_MASK)) { |
903 | dent = extract_vfat_name(itr); | |
904 | if (!dent) | |
905 | continue; | |
906 | itr->name = itr->l_name; | |
907 | break; | |
908 | } else { | |
909 | /* Volume label or VFAT entry, skip */ | |
910 | continue; | |
911 | } | |
912 | } | |
913 | ||
914 | break; | |
915 | } | |
916 | ||
917 | get_name(dent, itr->s_name); | |
918 | if (!itr->name) | |
919 | itr->name = itr->s_name; | |
920 | ||
921 | return 1; | |
922 | } | |
923 | ||
924 | /** | |
925 | * fat_itr_isdir() - is current cursor position pointing to a directory | |
926 | * | |
927 | * @itr: the iterator | |
928 | * @return true if cursor is at a directory | |
929 | */ | |
930 | static int fat_itr_isdir(fat_itr *itr) | |
931 | { | |
932 | return !!(itr->dent->attr & ATTR_DIR); | |
933 | } | |
934 | ||
935 | /* | |
936 | * Helpers: | |
937 | */ | |
938 | ||
939 | #define TYPE_FILE 0x1 | |
940 | #define TYPE_DIR 0x2 | |
941 | #define TYPE_ANY (TYPE_FILE | TYPE_DIR) | |
942 | ||
943 | /** | |
944 | * fat_itr_resolve() - traverse directory structure to resolve the | |
945 | * requested path. | |
946 | * | |
947 | * Traverse directory structure to the requested path. If the specified | |
948 | * path is to a directory, this will descend into the directory and | |
949 | * leave it iterator at the start of the directory. If the path is to a | |
950 | * file, it will leave the iterator in the parent directory with current | |
951 | * cursor at file's entry in the directory. | |
952 | * | |
953 | * @itr: iterator initialized to root | |
954 | * @path: the requested path | |
955 | * @type: bitmask of allowable file types | |
956 | * @return 0 on success or -errno | |
957 | */ | |
958 | static int fat_itr_resolve(fat_itr *itr, const char *path, unsigned type) | |
959 | { | |
960 | const char *next; | |
961 | ||
962 | /* chomp any extra leading slashes: */ | |
963 | while (path[0] && ISDIRDELIM(path[0])) | |
964 | path++; | |
965 | ||
966 | /* are we at the end? */ | |
967 | if (strlen(path) == 0) { | |
968 | if (!(type & TYPE_DIR)) | |
969 | return -ENOENT; | |
970 | return 0; | |
971 | } | |
972 | ||
973 | /* find length of next path entry: */ | |
974 | next = path; | |
975 | while (next[0] && !ISDIRDELIM(next[0])) | |
976 | next++; | |
977 | ||
b94b6be5 AT |
978 | if (itr->is_root) { |
979 | /* root dir doesn't have "." nor ".." */ | |
980 | if ((((next - path) == 1) && !strncmp(path, ".", 1)) || | |
981 | (((next - path) == 2) && !strncmp(path, "..", 2))) { | |
982 | /* point back to itself */ | |
983 | itr->clust = itr->fsdata->root_cluster; | |
f528c140 | 984 | itr->next_clust = itr->fsdata->root_cluster; |
b94b6be5 AT |
985 | itr->dent = NULL; |
986 | itr->remaining = 0; | |
987 | itr->last_cluster = 0; | |
988 | ||
989 | if (next[0] == 0) { | |
990 | if (type & TYPE_DIR) | |
991 | return 0; | |
992 | else | |
993 | return -ENOENT; | |
994 | } | |
995 | ||
996 | return fat_itr_resolve(itr, next, type); | |
997 | } | |
998 | } | |
999 | ||
c6e3baa5 RC |
1000 | while (fat_itr_next(itr)) { |
1001 | int match = 0; | |
1002 | unsigned n = max(strlen(itr->name), (size_t)(next - path)); | |
1003 | ||
1004 | /* check both long and short name: */ | |
1005 | if (!strncasecmp(path, itr->name, n)) | |
1006 | match = 1; | |
1007 | else if (itr->name != itr->s_name && | |
1008 | !strncasecmp(path, itr->s_name, n)) | |
1009 | match = 1; | |
1010 | ||
1011 | if (!match) | |
1012 | continue; | |
1013 | ||
1014 | if (fat_itr_isdir(itr)) { | |
1015 | /* recurse into directory: */ | |
1016 | fat_itr_child(itr, itr); | |
1017 | return fat_itr_resolve(itr, next, type); | |
1018 | } else if (next[0]) { | |
1019 | /* | |
1020 | * If next is not empty then we have a case | |
1021 | * like: /path/to/realfile/nonsense | |
1022 | */ | |
1023 | debug("bad trailing path: %s\n", next); | |
1024 | return -ENOENT; | |
1025 | } else if (!(type & TYPE_FILE)) { | |
1026 | return -ENOTDIR; | |
1027 | } else { | |
1028 | return 0; | |
1029 | } | |
1030 | } | |
1031 | ||
1032 | return -ENOENT; | |
1033 | } | |
1034 | ||
9795e07b | 1035 | int file_fat_detectfs(void) |
71f95118 | 1036 | { |
7385c28e WD |
1037 | boot_sector bs; |
1038 | volume_info volinfo; | |
1039 | int fatsize; | |
1040 | char vol_label[12]; | |
71f95118 | 1041 | |
7385c28e | 1042 | if (cur_dev == NULL) { |
7205e407 WD |
1043 | printf("No current device\n"); |
1044 | return 1; | |
1045 | } | |
7385c28e | 1046 | |
fc843a02 | 1047 | #if defined(CONFIG_IDE) || \ |
10e40d54 | 1048 | defined(CONFIG_SATA) || \ |
c649e3c9 | 1049 | defined(CONFIG_SCSI) || \ |
dd60d122 | 1050 | defined(CONFIG_CMD_USB) || \ |
21f6f963 | 1051 | defined(CONFIG_MMC) |
7205e407 | 1052 | printf("Interface: "); |
7385c28e WD |
1053 | switch (cur_dev->if_type) { |
1054 | case IF_TYPE_IDE: | |
1055 | printf("IDE"); | |
1056 | break; | |
1057 | case IF_TYPE_SATA: | |
1058 | printf("SATA"); | |
1059 | break; | |
1060 | case IF_TYPE_SCSI: | |
1061 | printf("SCSI"); | |
1062 | break; | |
1063 | case IF_TYPE_ATAPI: | |
1064 | printf("ATAPI"); | |
1065 | break; | |
1066 | case IF_TYPE_USB: | |
1067 | printf("USB"); | |
1068 | break; | |
1069 | case IF_TYPE_DOC: | |
1070 | printf("DOC"); | |
1071 | break; | |
1072 | case IF_TYPE_MMC: | |
1073 | printf("MMC"); | |
1074 | break; | |
1075 | default: | |
1076 | printf("Unknown"); | |
7205e407 | 1077 | } |
7385c28e | 1078 | |
bcce53d0 | 1079 | printf("\n Device %d: ", cur_dev->devnum); |
7205e407 WD |
1080 | dev_print(cur_dev); |
1081 | #endif | |
7385c28e WD |
1082 | |
1083 | if (read_bootsectandvi(&bs, &volinfo, &fatsize)) { | |
7205e407 WD |
1084 | printf("\nNo valid FAT fs found\n"); |
1085 | return 1; | |
1086 | } | |
7385c28e WD |
1087 | |
1088 | memcpy(vol_label, volinfo.volume_label, 11); | |
7205e407 | 1089 | vol_label[11] = '\0'; |
7385c28e WD |
1090 | volinfo.fs_type[5] = '\0'; |
1091 | ||
461f86e6 | 1092 | printf("Filesystem: %s \"%s\"\n", volinfo.fs_type, vol_label); |
7385c28e | 1093 | |
7205e407 | 1094 | return 0; |
71f95118 WD |
1095 | } |
1096 | ||
b7b5f319 SW |
1097 | int fat_exists(const char *filename) |
1098 | { | |
8eafae20 | 1099 | fsdata fsdata; |
2460098c | 1100 | fat_itr *itr; |
1ad0b98a | 1101 | int ret; |
1ad0b98a | 1102 | |
09fa964b | 1103 | itr = malloc_cache_aligned(sizeof(fat_itr)); |
af609e37 TT |
1104 | if (!itr) |
1105 | return 0; | |
8eafae20 RC |
1106 | ret = fat_itr_root(itr, &fsdata); |
1107 | if (ret) | |
af609e37 | 1108 | goto out; |
8eafae20 RC |
1109 | |
1110 | ret = fat_itr_resolve(itr, filename, TYPE_ANY); | |
725ffdb5 | 1111 | free(fsdata.fatbuf); |
af609e37 | 1112 | out: |
2460098c | 1113 | free(itr); |
1ad0b98a | 1114 | return ret == 0; |
b7b5f319 SW |
1115 | } |
1116 | ||
d455d878 | 1117 | int fat_size(const char *filename, loff_t *size) |
cf659819 | 1118 | { |
8eafae20 | 1119 | fsdata fsdata; |
2460098c | 1120 | fat_itr *itr; |
8eafae20 RC |
1121 | int ret; |
1122 | ||
09fa964b | 1123 | itr = malloc_cache_aligned(sizeof(fat_itr)); |
af609e37 TT |
1124 | if (!itr) |
1125 | return -ENOMEM; | |
8eafae20 RC |
1126 | ret = fat_itr_root(itr, &fsdata); |
1127 | if (ret) | |
af609e37 | 1128 | goto out_free_itr; |
8eafae20 RC |
1129 | |
1130 | ret = fat_itr_resolve(itr, filename, TYPE_FILE); | |
1131 | if (ret) { | |
1132 | /* | |
1133 | * Directories don't have size, but fs_size() is not | |
1134 | * expected to fail if passed a directory path: | |
1135 | */ | |
725ffdb5 | 1136 | free(fsdata.fatbuf); |
d0cd30eb AD |
1137 | ret = fat_itr_root(itr, &fsdata); |
1138 | if (ret) | |
1139 | goto out_free_itr; | |
1140 | ret = fat_itr_resolve(itr, filename, TYPE_DIR); | |
1141 | if (!ret) | |
8eafae20 | 1142 | *size = 0; |
af609e37 | 1143 | goto out_free_both; |
8eafae20 RC |
1144 | } |
1145 | ||
1146 | *size = FAT2CPU32(itr->dent->size); | |
af609e37 | 1147 | out_free_both: |
725ffdb5 | 1148 | free(fsdata.fatbuf); |
af609e37 | 1149 | out_free_itr: |
2460098c | 1150 | free(itr); |
725ffdb5 | 1151 | return ret; |
cf659819 SW |
1152 | } |
1153 | ||
1ad0b98a SR |
1154 | int file_fat_read_at(const char *filename, loff_t pos, void *buffer, |
1155 | loff_t maxsize, loff_t *actread) | |
71f95118 | 1156 | { |
8eafae20 | 1157 | fsdata fsdata; |
2460098c | 1158 | fat_itr *itr; |
8eafae20 RC |
1159 | int ret; |
1160 | ||
09fa964b | 1161 | itr = malloc_cache_aligned(sizeof(fat_itr)); |
af609e37 TT |
1162 | if (!itr) |
1163 | return -ENOMEM; | |
8eafae20 RC |
1164 | ret = fat_itr_root(itr, &fsdata); |
1165 | if (ret) | |
af609e37 | 1166 | goto out_free_itr; |
8eafae20 RC |
1167 | |
1168 | ret = fat_itr_resolve(itr, filename, TYPE_FILE); | |
1169 | if (ret) | |
af609e37 | 1170 | goto out_free_both; |
8eafae20 | 1171 | |
287c04e1 | 1172 | debug("reading %s at pos %llu\n", filename, pos); |
e48485f5 TFC |
1173 | |
1174 | /* For saving default max clustersize memory allocated to malloc pool */ | |
1175 | dir_entry *dentptr = itr->dent; | |
1176 | ||
1177 | free(itr); | |
1178 | ||
1179 | itr = NULL; | |
1180 | ||
1181 | ret = get_contents(&fsdata, dentptr, pos, buffer, maxsize, actread); | |
725ffdb5 | 1182 | |
af609e37 | 1183 | out_free_both: |
725ffdb5 | 1184 | free(fsdata.fatbuf); |
af609e37 | 1185 | out_free_itr: |
2460098c | 1186 | free(itr); |
725ffdb5 | 1187 | return ret; |
1170e634 BT |
1188 | } |
1189 | ||
1ad0b98a | 1190 | int file_fat_read(const char *filename, void *buffer, int maxsize) |
1170e634 | 1191 | { |
1ad0b98a SR |
1192 | loff_t actread; |
1193 | int ret; | |
1194 | ||
1195 | ret = file_fat_read_at(filename, 0, buffer, maxsize, &actread); | |
1196 | if (ret) | |
1197 | return ret; | |
1198 | else | |
1199 | return actread; | |
71f95118 | 1200 | } |
e6d52415 | 1201 | |
d455d878 SR |
1202 | int fat_read_file(const char *filename, void *buf, loff_t offset, loff_t len, |
1203 | loff_t *actread) | |
e6d52415 | 1204 | { |
1ad0b98a | 1205 | int ret; |
e6d52415 | 1206 | |
d455d878 SR |
1207 | ret = file_fat_read_at(filename, offset, buf, len, actread); |
1208 | if (ret) | |
e6d52415 | 1209 | printf("** Unable to read file %s **\n", filename); |
e6d52415 | 1210 | |
d455d878 | 1211 | return ret; |
e6d52415 SG |
1212 | } |
1213 | ||
1f40366b RC |
1214 | typedef struct { |
1215 | struct fs_dir_stream parent; | |
1216 | struct fs_dirent dirent; | |
1217 | fsdata fsdata; | |
1218 | fat_itr itr; | |
1219 | } fat_dir; | |
1220 | ||
1221 | int fat_opendir(const char *filename, struct fs_dir_stream **dirsp) | |
1222 | { | |
34dd853c | 1223 | fat_dir *dir; |
1f40366b RC |
1224 | int ret; |
1225 | ||
34dd853c | 1226 | dir = malloc_cache_aligned(sizeof(*dir)); |
1f40366b RC |
1227 | if (!dir) |
1228 | return -ENOMEM; | |
34dd853c | 1229 | memset(dir, 0, sizeof(*dir)); |
1f40366b RC |
1230 | |
1231 | ret = fat_itr_root(&dir->itr, &dir->fsdata); | |
1232 | if (ret) | |
af609e37 | 1233 | goto fail_free_dir; |
1f40366b RC |
1234 | |
1235 | ret = fat_itr_resolve(&dir->itr, filename, TYPE_DIR); | |
1236 | if (ret) | |
af609e37 | 1237 | goto fail_free_both; |
1f40366b RC |
1238 | |
1239 | *dirsp = (struct fs_dir_stream *)dir; | |
1240 | return 0; | |
1241 | ||
af609e37 | 1242 | fail_free_both: |
725ffdb5 | 1243 | free(dir->fsdata.fatbuf); |
af609e37 | 1244 | fail_free_dir: |
1f40366b RC |
1245 | free(dir); |
1246 | return ret; | |
1247 | } | |
1248 | ||
1249 | int fat_readdir(struct fs_dir_stream *dirs, struct fs_dirent **dentp) | |
1250 | { | |
1251 | fat_dir *dir = (fat_dir *)dirs; | |
1252 | struct fs_dirent *dent = &dir->dirent; | |
1253 | ||
1254 | if (!fat_itr_next(&dir->itr)) | |
1255 | return -ENOENT; | |
1256 | ||
1257 | memset(dent, 0, sizeof(*dent)); | |
1258 | strcpy(dent->name, dir->itr.name); | |
1259 | ||
1260 | if (fat_itr_isdir(&dir->itr)) { | |
1261 | dent->type = FS_DT_DIR; | |
1262 | } else { | |
1263 | dent->type = FS_DT_REG; | |
1264 | dent->size = FAT2CPU32(dir->itr.dent->size); | |
1265 | } | |
1266 | ||
1267 | *dentp = dent; | |
1268 | ||
1269 | return 0; | |
1270 | } | |
1271 | ||
1272 | void fat_closedir(struct fs_dir_stream *dirs) | |
1273 | { | |
1274 | fat_dir *dir = (fat_dir *)dirs; | |
725ffdb5 | 1275 | free(dir->fsdata.fatbuf); |
1f40366b RC |
1276 | free(dir); |
1277 | } | |
1278 | ||
e6d52415 SG |
1279 | void fat_close(void) |
1280 | { | |
1281 | } |