1 /*
2 * cmd_gpt.c -- GPT (GUID Partition Table) handling command
3 *
4 * Copyright (C) 2015
5 * Lukasz Majewski <l.majewski@majess.pl>
6 *
7 * Copyright (C) 2012 Samsung Electronics
8 * author: Lukasz Majewski <l.majewski@samsung.com>
9 * author: Piotr Wilczek <p.wilczek@samsung.com>
10 *
11 * SPDX-License-Identifier: GPL-2.0+
12 */
13
14 #include <common.h>
15 #include <malloc.h>
16 #include <command.h>
17 #include <part_efi.h>
18 #include <exports.h>
19 #include <linux/ctype.h>
20 #include <div64.h>
21 #include <memalign.h>
22 #include <linux/compat.h>
23 #include <linux/sizes.h>
24 #include <stdlib.h>
25
26 static LIST_HEAD(disk_partitions);
27
28 /**
29 * extract_env(): Expand env name from string format '&{env_name}'
30 * and return pointer to the env (if the env is set)
31 *
32 * @param str - pointer to string
33 * @param env - pointer to pointer to extracted env
34 *
35 * @return - zero on successful expand and env is set
36 */
extract_env(const char * str,char ** env)37 static int extract_env(const char *str, char **env)
38 {
39 int ret = -1;
40 char *e, *s;
41 #ifdef CONFIG_RANDOM_UUID
42 char uuid_str[UUID_STR_LEN + 1];
43 #endif
44
45 if (!str || strlen(str) < 4)
46 return -1;
47
48 if (!((strncmp(str, "${", 2) == 0) && (str[strlen(str) - 1] == '}')))
49 return -1;
50
51 s = strdup(str);
52 if (s == NULL)
53 return -1;
54
55 memset(s + strlen(s) - 1, '\0', 1);
56 memmove(s, s + 2, strlen(s) - 1);
57
58 e = env_get(s);
59 if (e == NULL) {
60 #ifdef CONFIG_RANDOM_UUID
61 debug("%s unset. ", str);
62 gen_rand_uuid_str(uuid_str, UUID_STR_FORMAT_GUID);
63 env_set(s, uuid_str);
64
65 e = env_get(s);
66 if (e) {
67 debug("Set to random.\n");
68 ret = 0;
69 } else {
70 debug("Can't get random UUID.\n");
71 }
72 #else
73 debug("%s unset.\n", str);
74 #endif
75 } else {
76 debug("%s get from environment.\n", str);
77 ret = 0;
78 }
79
80 *env = e;
81 free(s);
82
83 return ret;
84 }
85
86 /**
87 * extract_val(): Extract value from a key=value pair list (comma separated).
88 * Only value for the given key is returend.
89 * Function allocates memory for the value, remember to free!
90 *
91 * @param str - pointer to string with key=values pairs
92 * @param key - pointer to the key to search for
93 *
94 * @return - pointer to allocated string with the value
95 */
extract_val(const char * str,const char * key)96 static char *extract_val(const char *str, const char *key)
97 {
98 char *v, *k;
99 char *s, *strcopy;
100 char *new = NULL;
101
102 strcopy = strdup(str);
103 if (strcopy == NULL)
104 return NULL;
105
106 s = strcopy;
107 while (s) {
108 v = strsep(&s, ",");
109 if (!v)
110 break;
111 k = strsep(&v, "=");
112 if (!k)
113 break;
114 if (strcmp(k, key) == 0) {
115 new = strdup(v);
116 break;
117 }
118 }
119
120 free(strcopy);
121
122 return new;
123 }
124
125 /**
126 * found_key(): Found key without value in parameter list (comma separated).
127 *
128 * @param str - pointer to string with key
129 * @param key - pointer to the key to search for
130 *
131 * @return - true on found key
132 */
found_key(const char * str,const char * key)133 static bool found_key(const char *str, const char *key)
134 {
135 char *k;
136 char *s, *strcopy;
137 bool result = false;
138
139 strcopy = strdup(str);
140 if (!strcopy)
141 return NULL;
142
143 s = strcopy;
144 while (s) {
145 k = strsep(&s, ",");
146 if (!k)
147 break;
148 if (strcmp(k, key) == 0) {
149 result = true;
150 break;
151 }
152 }
153
154 free(strcopy);
155
156 return result;
157 }
158
calc_parts_list_len(int numparts)159 static int calc_parts_list_len(int numparts)
160 {
161 int partlistlen = UUID_STR_LEN + 1 + strlen("uuid_disk=");
162 /* for the comma */
163 partlistlen++;
164
165 /* per-partition additions; numparts starts at 1, so this should be correct */
166 partlistlen += numparts * (strlen("name=,") + PART_NAME_LEN + 1);
167 /* see part.h for definition of struct disk_partition */
168 partlistlen += numparts * (strlen("start=MiB,") + sizeof(lbaint_t) + 1);
169 partlistlen += numparts * (strlen("size=MiB,") + sizeof(lbaint_t) + 1);
170 partlistlen += numparts * (strlen("uuid=;") + UUID_STR_LEN + 1);
171 /* for the terminating null */
172 partlistlen++;
173 debug("Length of partitions_list is %d for %d partitions\n", partlistlen,
174 numparts);
175 return partlistlen;
176 }
177
178 #ifdef CONFIG_CMD_GPT_RENAME
del_gpt_info(void)179 static void del_gpt_info(void)
180 {
181 struct list_head *pos = &disk_partitions;
182 struct disk_part *curr;
183 while (!list_empty(pos)) {
184 curr = list_entry(pos->next, struct disk_part, list);
185 list_del(pos->next);
186 free(curr);
187 }
188 }
189
allocate_disk_part(disk_partition_t * info,int partnum)190 static struct disk_part *allocate_disk_part(disk_partition_t *info, int partnum)
191 {
192 struct disk_part *newpart;
193 newpart = calloc(1, sizeof(struct disk_part));
194 if (!newpart)
195 return ERR_PTR(-ENOMEM);
196
197 newpart->gpt_part_info.start = info->start;
198 newpart->gpt_part_info.size = info->size;
199 newpart->gpt_part_info.blksz = info->blksz;
200 strncpy((char *)newpart->gpt_part_info.name, (const char *)info->name,
201 PART_NAME_LEN);
202 newpart->gpt_part_info.name[PART_NAME_LEN - 1] = '\0';
203 strncpy((char *)newpart->gpt_part_info.type, (const char *)info->type,
204 PART_TYPE_LEN);
205 newpart->gpt_part_info.type[PART_TYPE_LEN - 1] = '\0';
206 newpart->gpt_part_info.bootable = info->bootable;
207 #ifdef CONFIG_PARTITION_UUIDS
208 strncpy(newpart->gpt_part_info.uuid, (const char *)info->uuid,
209 UUID_STR_LEN);
210 /* UUID_STR_LEN is correct, as uuid[]'s length is UUID_STR_LEN+1 chars */
211 newpart->gpt_part_info.uuid[UUID_STR_LEN] = '\0';
212 #endif
213 newpart->partnum = partnum;
214
215 return newpart;
216 }
217
prettyprint_part_size(char * sizestr,lbaint_t partsize,lbaint_t blksize)218 static void prettyprint_part_size(char *sizestr, lbaint_t partsize,
219 lbaint_t blksize)
220 {
221 unsigned long long partbytes, partmegabytes;
222
223 partbytes = partsize * blksize;
224 partmegabytes = lldiv(partbytes, SZ_1M);
225 snprintf(sizestr, 16, "%lluMiB", partmegabytes);
226 }
227
print_gpt_info(void)228 static void print_gpt_info(void)
229 {
230 struct list_head *pos;
231 struct disk_part *curr;
232 char partstartstr[16];
233 char partsizestr[16];
234
235 list_for_each(pos, &disk_partitions) {
236 curr = list_entry(pos, struct disk_part, list);
237 prettyprint_part_size(partstartstr, curr->gpt_part_info.start,
238 curr->gpt_part_info.blksz);
239 prettyprint_part_size(partsizestr, curr->gpt_part_info.size,
240 curr->gpt_part_info.blksz);
241
242 printf("Partition %d:\n", curr->partnum);
243 printf("Start %s, size %s\n", partstartstr, partsizestr);
244 printf("Block size %lu, name %s\n", curr->gpt_part_info.blksz,
245 curr->gpt_part_info.name);
246 printf("Type %s, bootable %d\n", curr->gpt_part_info.type,
247 curr->gpt_part_info.bootable);
248 #ifdef CONFIG_PARTITION_UUIDS
249 printf("UUID %s\n", curr->gpt_part_info.uuid);
250 #endif
251 printf("\n");
252 }
253 }
254
255 /*
256 * create the string that upstream 'gpt write' command will accept as an
257 * argument
258 *
259 * From doc/README.gpt, Format of partitions layout:
260 * "uuid_disk=...;name=u-boot,size=60MiB,uuid=...;
261 * name=kernel,size=60MiB,uuid=...;"
262 * The fields 'name' and 'size' are mandatory for every partition.
263 * The field 'start' is optional. The fields 'uuid' and 'uuid_disk'
264 * are optional if CONFIG_RANDOM_UUID is enabled.
265 */
create_gpt_partitions_list(int numparts,const char * guid,char * partitions_list)266 static int create_gpt_partitions_list(int numparts, const char *guid,
267 char *partitions_list)
268 {
269 struct list_head *pos;
270 struct disk_part *curr;
271 char partstr[PART_NAME_LEN + 1];
272
273 if (!partitions_list)
274 return -EINVAL;
275
276 strcpy(partitions_list, "uuid_disk=");
277 strncat(partitions_list, guid, UUID_STR_LEN + 1);
278 strcat(partitions_list, ";");
279
280 list_for_each(pos, &disk_partitions) {
281 curr = list_entry(pos, struct disk_part, list);
282 strcat(partitions_list, "name=");
283 strncat(partitions_list, (const char *)curr->gpt_part_info.name,
284 PART_NAME_LEN + 1);
285 strcat(partitions_list, ",start=");
286 prettyprint_part_size(partstr, (unsigned long)curr->gpt_part_info.start,
287 (unsigned long) curr->gpt_part_info.blksz);
288 /* one extra byte for NULL */
289 strncat(partitions_list, partstr, PART_NAME_LEN + 1);
290 strcat(partitions_list, ",size=");
291 prettyprint_part_size(partstr, curr->gpt_part_info.size,
292 curr->gpt_part_info.blksz);
293 strncat(partitions_list, partstr, PART_NAME_LEN + 1);
294
295 strcat(partitions_list, ",uuid=");
296 strncat(partitions_list, curr->gpt_part_info.uuid,
297 UUID_STR_LEN + 1);
298 strcat(partitions_list, ";");
299 }
300 return 0;
301 }
302
303 /*
304 * read partition info into disk_partitions list where
305 * it can be printed or modified
306 */
get_gpt_info(struct blk_desc * dev_desc)307 static int get_gpt_info(struct blk_desc *dev_desc)
308 {
309 /* start partition numbering at 1, as U-Boot does */
310 int valid_parts = 0, p, ret;
311 disk_partition_t info;
312 struct disk_part *new_disk_part;
313
314 /*
315 * Always re-read partition info from device, in case
316 * it has changed
317 */
318 INIT_LIST_HEAD(&disk_partitions);
319
320 for (p = 1; p <= MAX_SEARCH_PARTITIONS; p++) {
321 ret = part_get_info(dev_desc, p, &info);
322 if (ret)
323 continue;
324
325 /* Add 1 here because counter is zero-based but p1 is
326 the first partition */
327 new_disk_part = allocate_disk_part(&info, valid_parts+1);
328 if (IS_ERR(new_disk_part))
329 goto out;
330
331 list_add_tail(&new_disk_part->list, &disk_partitions);
332 valid_parts++;
333 }
334 if (valid_parts == 0) {
335 printf("** No valid partitions found **\n");
336 goto out;
337 }
338 return valid_parts;
339 out:
340 if (valid_parts >= 1)
341 del_gpt_info();
342 return -ENODEV;
343 }
344
345 /* a wrapper to test get_gpt_info */
do_get_gpt_info(struct blk_desc * dev_desc)346 static int do_get_gpt_info(struct blk_desc *dev_desc)
347 {
348 int ret;
349
350 ret = get_gpt_info(dev_desc);
351 if (ret > 0) {
352 print_gpt_info();
353 del_gpt_info();
354 return 0;
355 }
356 return ret;
357 }
358 #endif
359
360 /**
361 * set_gpt_info(): Fill partition information from string
362 * function allocates memory, remember to free!
363 *
364 * @param dev_desc - pointer block device descriptor
365 * @param str_part - pointer to string with partition information
366 * @param str_disk_guid - pointer to pointer to allocated string with disk guid
367 * @param partitions - pointer to pointer to allocated partitions array
368 * @param parts_count - number of partitions
369 *
370 * @return - zero on success, otherwise error
371 *
372 */
set_gpt_info(struct blk_desc * dev_desc,const char * str_part,char ** str_disk_guid,disk_partition_t ** partitions,u8 * parts_count)373 static int set_gpt_info(struct blk_desc *dev_desc,
374 const char *str_part,
375 char **str_disk_guid,
376 disk_partition_t **partitions,
377 u8 *parts_count)
378 {
379 char *tok, *str, *s;
380 int i;
381 char *val, *p;
382 int p_count;
383 disk_partition_t *parts;
384 int errno = 0;
385 uint64_t size_ll, start_ll;
386 lbaint_t offset = 0;
387 int max_str_part = calc_parts_list_len(MAX_SEARCH_PARTITIONS);
388
389 debug("%s: lba num: 0x%x %d\n", __func__,
390 (unsigned int)dev_desc->lba, (unsigned int)dev_desc->lba);
391
392 if (str_part == NULL)
393 return -1;
394
395 str = strdup(str_part);
396 if (str == NULL)
397 return -ENOMEM;
398
399 /* extract disk guid */
400 s = str;
401 val = extract_val(str, "uuid_disk");
402 if (!val) {
403 #ifdef CONFIG_RANDOM_UUID
404 *str_disk_guid = malloc(UUID_STR_LEN + 1);
405 if (*str_disk_guid == NULL)
406 return -ENOMEM;
407 gen_rand_uuid_str(*str_disk_guid, UUID_STR_FORMAT_STD);
408 #else
409 free(str);
410 return -2;
411 #endif
412 } else {
413 val = strsep(&val, ";");
414 if (extract_env(val, &p))
415 p = val;
416 *str_disk_guid = strdup(p);
417 free(val);
418 /* Move s to first partition */
419 strsep(&s, ";");
420 }
421 if (s == NULL) {
422 printf("Error: is the partitions string NULL-terminated?\n");
423 return -EINVAL;
424 }
425 if (strnlen(s, max_str_part) == 0)
426 return -3;
427
428 i = strnlen(s, max_str_part) - 1;
429 if (s[i] == ';')
430 s[i] = '\0';
431
432 /* calculate expected number of partitions */
433 p_count = 1;
434 p = s;
435 while (*p) {
436 if (*p++ == ';')
437 p_count++;
438 }
439
440 /* allocate memory for partitions */
441 parts = calloc(sizeof(disk_partition_t), p_count);
442 if (parts == NULL)
443 return -ENOMEM;
444
445 /* retrieve partitions data from string */
446 for (i = 0; i < p_count; i++) {
447 tok = strsep(&s, ";");
448
449 if (tok == NULL)
450 break;
451
452 /* uuid */
453 val = extract_val(tok, "uuid");
454 if (!val) {
455 /* 'uuid' is optional if random uuid's are enabled */
456 #ifdef CONFIG_RANDOM_UUID
457 gen_rand_uuid_str(parts[i].uuid, UUID_STR_FORMAT_STD);
458 #else
459 errno = -4;
460 goto err;
461 #endif
462 } else {
463 if (extract_env(val, &p))
464 p = val;
465 if (strnlen(p, max_str_part) >= sizeof(parts[i].uuid)) {
466 printf("Wrong uuid format for partition %d\n", i);
467 errno = -4;
468 goto err;
469 }
470 strncpy((char *)parts[i].uuid, p, max_str_part);
471 free(val);
472 }
473 #ifdef CONFIG_PARTITION_TYPE_GUID
474 /* guid */
475 val = extract_val(tok, "type");
476 if (val) {
477 /* 'type' is optional */
478 if (extract_env(val, &p))
479 p = val;
480 if (strnlen(p, max_str_part) >= sizeof(parts[i].type_guid)) {
481 printf("Wrong type guid format for partition %d\n",
482 i);
483 errno = -4;
484 goto err;
485 }
486 strncpy((char *)parts[i].type_guid, p, max_str_part);
487 free(val);
488 }
489 #endif
490 /* name */
491 val = extract_val(tok, "name");
492 if (!val) { /* name is mandatory */
493 errno = -4;
494 goto err;
495 }
496 if (extract_env(val, &p))
497 p = val;
498 if (strnlen(p, max_str_part) >= sizeof(parts[i].name)) {
499 errno = -4;
500 goto err;
501 }
502 strncpy((char *)parts[i].name, p, max_str_part);
503 free(val);
504
505 /* size */
506 val = extract_val(tok, "size");
507 if (!val) { /* 'size' is mandatory */
508 errno = -4;
509 goto err;
510 }
511 if (extract_env(val, &p))
512 p = val;
513 if ((strcmp(p, "-") == 0)) {
514 /* Let part efi module to auto extend the size */
515 parts[i].size = 0;
516 } else {
517 size_ll = ustrtoull(p, &p, 0);
518 parts[i].size = lldiv(size_ll, dev_desc->rawblksz);
519 }
520
521 free(val);
522
523 /* start address */
524 val = extract_val(tok, "start");
525 if (val) { /* start address is optional */
526 if (extract_env(val, &p))
527 p = val;
528 start_ll = ustrtoull(p, &p, 0);
529 parts[i].start = lldiv(start_ll, dev_desc->rawblksz);
530 free(val);
531 }
532
533 offset += parts[i].size + parts[i].start;
534
535 /* bootable */
536 if (found_key(tok, "bootable"))
537 parts[i].bootable = 1;
538 }
539
540 *parts_count = p_count;
541 *partitions = parts;
542 free(str);
543
544 return 0;
545 err:
546 free(str);
547 free(*str_disk_guid);
548 free(parts);
549
550 return errno;
551 }
552
gpt_default(struct blk_desc * blk_dev_desc,const char * str_part)553 static int gpt_default(struct blk_desc *blk_dev_desc, const char *str_part)
554 {
555 int ret;
556 char *str_disk_guid;
557 u8 part_count = 0;
558 disk_partition_t *partitions = NULL;
559
560 /* fill partitions */
561 ret = set_gpt_info(blk_dev_desc, str_part,
562 &str_disk_guid, &partitions, &part_count);
563 if (ret) {
564 if (ret == -1)
565 printf("No partition list provided\n");
566 if (ret == -2)
567 printf("Missing disk guid\n");
568 if ((ret == -3) || (ret == -4))
569 printf("Partition list incomplete\n");
570 return -1;
571 }
572
573 /* save partitions layout to disk */
574 ret = gpt_restore(blk_dev_desc, str_disk_guid, partitions, part_count);
575 free(str_disk_guid);
576 free(partitions);
577
578 return ret;
579 }
580
gpt_verify(struct blk_desc * blk_dev_desc,const char * str_part)581 static int gpt_verify(struct blk_desc *blk_dev_desc, const char *str_part)
582 {
583 ALLOC_CACHE_ALIGN_BUFFER_PAD(gpt_header, gpt_head, 1, blk_dev_desc->rawblksz);
584 disk_partition_t *partitions = NULL;
585 gpt_entry *gpt_pte = NULL;
586 char *str_disk_guid;
587 u8 part_count = 0;
588 int ret = 0;
589
590 /* fill partitions */
591 ret = set_gpt_info(blk_dev_desc, str_part,
592 &str_disk_guid, &partitions, &part_count);
593 if (ret) {
594 if (ret == -1) {
595 printf("No partition list provided - only basic check\n");
596 ret = gpt_verify_headers(blk_dev_desc, gpt_head,
597 &gpt_pte);
598 goto out;
599 }
600 if (ret == -2)
601 printf("Missing disk guid\n");
602 if ((ret == -3) || (ret == -4))
603 printf("Partition list incomplete\n");
604 return -1;
605 }
606
607 /* Check partition layout with provided pattern */
608 ret = gpt_verify_partitions(blk_dev_desc, partitions, part_count,
609 gpt_head, &gpt_pte);
610 free(str_disk_guid);
611 free(partitions);
612 out:
613 free(gpt_pte);
614 return ret;
615 }
616
do_disk_guid(struct blk_desc * dev_desc,char * const namestr)617 static int do_disk_guid(struct blk_desc *dev_desc, char * const namestr)
618 {
619 int ret;
620 char disk_guid[UUID_STR_LEN + 1];
621
622 ret = get_disk_guid(dev_desc, disk_guid);
623 if (ret < 0)
624 return CMD_RET_FAILURE;
625
626 if (namestr)
627 env_set(namestr, disk_guid);
628 else
629 printf("%s\n", disk_guid);
630
631 return ret;
632 }
633
634 #ifdef CONFIG_CMD_GPT_RENAME
635 /*
636 * There are 3 malloc() calls in set_gpt_info() and there is no info about which
637 * failed.
638 */
set_gpt_cleanup(char ** str_disk_guid,disk_partition_t ** partitions)639 static void set_gpt_cleanup(char **str_disk_guid,
640 disk_partition_t **partitions)
641 {
642 #ifdef CONFIG_RANDOM_UUID
643 if (str_disk_guid)
644 free(str_disk_guid);
645 #endif
646 if (partitions)
647 free(partitions);
648 }
649
do_rename_gpt_parts(struct blk_desc * dev_desc,char * subcomm,char * name1,char * name2)650 static int do_rename_gpt_parts(struct blk_desc *dev_desc, char *subcomm,
651 char *name1, char *name2)
652 {
653 struct list_head *pos;
654 struct disk_part *curr;
655 disk_partition_t *new_partitions = NULL;
656 char disk_guid[UUID_STR_LEN + 1];
657 char *partitions_list, *str_disk_guid;
658 u8 part_count = 0;
659 int partlistlen, ret, numparts = 0, partnum, i = 1, ctr1 = 0, ctr2 = 0;
660
661 if ((subcomm == NULL) || (name1 == NULL) || (name2 == NULL) ||
662 (strcmp(subcomm, "swap") && (strcmp(subcomm, "rename"))))
663 return -EINVAL;
664
665 ret = get_disk_guid(dev_desc, disk_guid);
666 if (ret < 0)
667 return ret;
668 /*
669 * Allocates disk_partitions, requiring matching call to del_gpt_info()
670 * if successful.
671 */
672 numparts = get_gpt_info(dev_desc);
673 if (numparts <= 0)
674 return numparts ? numparts : -ENODEV;
675
676 partlistlen = calc_parts_list_len(numparts);
677 partitions_list = malloc(partlistlen);
678 if (!partitions_list) {
679 del_gpt_info();
680 return -ENOMEM;
681 }
682 memset(partitions_list, '\0', partlistlen);
683
684 ret = create_gpt_partitions_list(numparts, disk_guid, partitions_list);
685 if (ret < 0) {
686 free(partitions_list);
687 return ret;
688 }
689 /*
690 * Uncomment the following line to print a string that 'gpt write'
691 * or 'gpt verify' will accept as input.
692 */
693 debug("OLD partitions_list is %s with %u chars\n", partitions_list,
694 (unsigned)strlen(partitions_list));
695
696 /* set_gpt_info allocates new_partitions and str_disk_guid */
697 ret = set_gpt_info(dev_desc, partitions_list, &str_disk_guid,
698 &new_partitions, &part_count);
699 if (ret < 0) {
700 del_gpt_info();
701 free(partitions_list);
702 if (ret == -ENOMEM)
703 set_gpt_cleanup(&str_disk_guid, &new_partitions);
704 else
705 goto out;
706 }
707
708 if (!strcmp(subcomm, "swap")) {
709 if ((strlen(name1) > PART_NAME_LEN) || (strlen(name2) > PART_NAME_LEN)) {
710 printf("Names longer than %d characters are truncated.\n", PART_NAME_LEN);
711 ret = -EINVAL;
712 goto out;
713 }
714 list_for_each(pos, &disk_partitions) {
715 curr = list_entry(pos, struct disk_part, list);
716 if (!strcmp((char *)curr->gpt_part_info.name, name1)) {
717 strcpy((char *)curr->gpt_part_info.name, name2);
718 ctr1++;
719 } else if (!strcmp((char *)curr->gpt_part_info.name, name2)) {
720 strcpy((char *)curr->gpt_part_info.name, name1);
721 ctr2++;
722 }
723 }
724 if ((ctr1 + ctr2 < 2) || (ctr1 != ctr2)) {
725 printf("Cannot swap partition names except in pairs.\n");
726 ret = -EINVAL;
727 goto out;
728 }
729 } else { /* rename */
730 if (strlen(name2) > PART_NAME_LEN) {
731 printf("Names longer than %d characters are truncated.\n", PART_NAME_LEN);
732 ret = -EINVAL;
733 goto out;
734 }
735 partnum = (int)simple_strtol(name1, NULL, 10);
736 if ((partnum < 0) || (partnum > numparts)) {
737 printf("Illegal partition number %s\n", name1);
738 ret = -EINVAL;
739 goto out;
740 }
741 ret = part_get_info(dev_desc, partnum, new_partitions);
742 if (ret < 0)
743 goto out;
744
745 /* U-Boot partition numbering starts at 1 */
746 list_for_each(pos, &disk_partitions) {
747 curr = list_entry(pos, struct disk_part, list);
748 if (i == partnum) {
749 strcpy((char *)curr->gpt_part_info.name, name2);
750 break;
751 }
752 i++;
753 }
754 }
755
756 ret = create_gpt_partitions_list(numparts, disk_guid, partitions_list);
757 if (ret < 0)
758 goto out;
759 debug("NEW partitions_list is %s with %u chars\n", partitions_list,
760 (unsigned)strlen(partitions_list));
761
762 ret = set_gpt_info(dev_desc, partitions_list, &str_disk_guid,
763 &new_partitions, &part_count);
764 /*
765 * Even though valid pointers are here passed into set_gpt_info(),
766 * it mallocs again, and there's no way to tell which failed.
767 */
768 if (ret < 0) {
769 del_gpt_info();
770 free(partitions_list);
771 if (ret == -ENOMEM)
772 set_gpt_cleanup(&str_disk_guid, &new_partitions);
773 else
774 goto out;
775 }
776
777 debug("Writing new partition table\n");
778 ret = gpt_restore(dev_desc, disk_guid, new_partitions, numparts);
779 if (ret < 0) {
780 printf("Writing new partition table failed\n");
781 goto out;
782 }
783
784 debug("Reading back new partition table\n");
785 /*
786 * Empty the existing disk_partitions list, as otherwise the memory in
787 * the original list is unreachable.
788 */
789 del_gpt_info();
790 numparts = get_gpt_info(dev_desc);
791 if (numparts <= 0) {
792 ret = numparts ? numparts : -ENODEV;
793 goto out;
794 }
795 printf("new partition table with %d partitions is:\n", numparts);
796 print_gpt_info();
797 del_gpt_info();
798 out:
799 free(new_partitions);
800 free(str_disk_guid);
801 free(partitions_list);
802 return ret;
803 }
804 #endif
805
806 /**
807 * do_gpt(): Perform GPT operations
808 *
809 * @param cmdtp - command name
810 * @param flag
811 * @param argc
812 * @param argv
813 *
814 * @return zero on success; otherwise error
815 */
do_gpt(cmd_tbl_t * cmdtp,int flag,int argc,char * const argv[])816 static int do_gpt(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
817 {
818 int ret = CMD_RET_SUCCESS;
819 int dev = 0;
820 char *ep;
821 struct blk_desc *blk_dev_desc = NULL;
822
823 #ifndef CONFIG_CMD_GPT_RENAME
824 if (argc < 4 || argc > 5)
825 #else
826 if (argc < 4 || argc > 6)
827 #endif
828 return CMD_RET_USAGE;
829
830 dev = (int)simple_strtoul(argv[3], &ep, 10);
831 if (!ep || ep[0] != '\0') {
832 printf("'%s' is not a number\n", argv[3]);
833 return CMD_RET_USAGE;
834 }
835 blk_dev_desc = blk_get_dev(argv[2], dev);
836 if (!blk_dev_desc) {
837 printf("%s: %s dev %d NOT available\n",
838 __func__, argv[2], dev);
839 return CMD_RET_FAILURE;
840 }
841
842 if (!blk_dev_desc->rawblksz || !blk_dev_desc->rawlba) {
843 blk_dev_desc->rawblksz = blk_dev_desc->blksz;
844 blk_dev_desc->rawlba = blk_dev_desc->lba;
845 }
846
847 if ((strcmp(argv[1], "write") == 0) && (argc == 5)) {
848 printf("Writing GPT: ");
849 ret = gpt_default(blk_dev_desc, argv[4]);
850 } else if ((strcmp(argv[1], "verify") == 0)) {
851 ret = gpt_verify(blk_dev_desc, argv[4]);
852 printf("Verify GPT: ");
853 } else if (strcmp(argv[1], "guid") == 0) {
854 ret = do_disk_guid(blk_dev_desc, argv[4]);
855 #ifdef CONFIG_CMD_GPT_RENAME
856 } else if (strcmp(argv[1], "read") == 0) {
857 ret = do_get_gpt_info(blk_dev_desc);
858 } else if ((strcmp(argv[1], "swap") == 0) ||
859 (strcmp(argv[1], "rename") == 0)) {
860 ret = do_rename_gpt_parts(blk_dev_desc, argv[1], argv[4], argv[5]);
861 #endif
862 } else {
863 return CMD_RET_USAGE;
864 }
865
866 if (ret) {
867 printf("error!\n");
868 return CMD_RET_FAILURE;
869 }
870
871 printf("success!\n");
872 return CMD_RET_SUCCESS;
873 }
874
875 U_BOOT_CMD(gpt, CONFIG_SYS_MAXARGS, 1, do_gpt,
876 "GUID Partition Table",
877 "<command> <interface> <dev> <partitions_list>\n"
878 " - GUID partition table restoration and validity check\n"
879 " Restore or verify GPT information on a device connected\n"
880 " to interface\n"
881 " Example usage:\n"
882 " gpt write mmc 0 $partitions\n"
883 " gpt verify mmc 0 $partitions\n"
884 " read <interface> <dev>\n"
885 " - read GPT into a data structure for manipulation\n"
886 " guid <interface> <dev>\n"
887 " - print disk GUID\n"
888 " guid <interface> <dev> <varname>\n"
889 " - set environment variable to disk GUID\n"
890 " Example usage:\n"
891 " gpt guid mmc 0\n"
892 " gpt guid mmc 0 varname\n"
893 #ifdef CONFIG_CMD_GPT_RENAME
894 "gpt partition renaming commands:\n"
895 "gpt swap <interface> <dev> <name1> <name2>\n"
896 " - change all partitions named name1 to name2\n"
897 " and vice-versa\n"
898 "gpt rename <interface> <dev> <part> <name>\n"
899 " - rename the specified partition\n"
900 " Example usage:\n"
901 " gpt swap mmc 0 foo bar\n"
902 " gpt rename mmc 0 3 foo\n"
903 #endif
904 );
905