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8b096237 PW |
1 | /* |
2 | * cmd_gpt.c -- GPT (GUID Partition Table) handling command | |
3 | * | |
bbb9ffac LM |
4 | * Copyright (C) 2015 |
5 | * Lukasz Majewski <l.majewski@majess.pl> | |
6 | * | |
8b096237 PW |
7 | * Copyright (C) 2012 Samsung Electronics |
8 | * author: Lukasz Majewski <l.majewski@samsung.com> | |
9 | * author: Piotr Wilczek <p.wilczek@samsung.com> | |
10 | * | |
1a459660 | 11 | * SPDX-License-Identifier: GPL-2.0+ |
8b096237 PW |
12 | */ |
13 | ||
14 | #include <common.h> | |
15 | #include <malloc.h> | |
16 | #include <command.h> | |
8b096237 PW |
17 | #include <part_efi.h> |
18 | #include <exports.h> | |
19 | #include <linux/ctype.h> | |
3e34cf7b | 20 | #include <div64.h> |
bbb9ffac | 21 | #include <memalign.h> |
8b096237 PW |
22 | |
23 | #ifndef CONFIG_PARTITION_UUIDS | |
24 | #error CONFIG_PARTITION_UUIDS must be enabled for CONFIG_CMD_GPT to be enabled | |
25 | #endif | |
26 | ||
27 | /** | |
28 | * extract_env(): Expand env name from string format '&{env_name}' | |
29 | * and return pointer to the env (if the env is set) | |
30 | * | |
31 | * @param str - pointer to string | |
32 | * @param env - pointer to pointer to extracted env | |
33 | * | |
34 | * @return - zero on successful expand and env is set | |
35 | */ | |
39206382 | 36 | static int extract_env(const char *str, char **env) |
8b096237 | 37 | { |
39206382 | 38 | int ret = -1; |
8b096237 | 39 | char *e, *s; |
39206382 PM |
40 | #ifdef CONFIG_RANDOM_UUID |
41 | char uuid_str[UUID_STR_LEN + 1]; | |
42 | #endif | |
8b096237 PW |
43 | |
44 | if (!str || strlen(str) < 4) | |
45 | return -1; | |
46 | ||
39206382 PM |
47 | if (!((strncmp(str, "${", 2) == 0) && (str[strlen(str) - 1] == '}'))) |
48 | return -1; | |
49 | ||
50 | s = strdup(str); | |
51 | if (s == NULL) | |
52 | return -1; | |
53 | ||
54 | memset(s + strlen(s) - 1, '\0', 1); | |
55 | memmove(s, s + 2, strlen(s) - 1); | |
56 | ||
57 | e = getenv(s); | |
58 | if (e == NULL) { | |
59 | #ifdef CONFIG_RANDOM_UUID | |
60 | debug("%s unset. ", str); | |
61 | gen_rand_uuid_str(uuid_str, UUID_STR_FORMAT_STD); | |
62 | setenv(s, uuid_str); | |
63 | ||
8b096237 | 64 | e = getenv(s); |
39206382 PM |
65 | if (e) { |
66 | debug("Set to random.\n"); | |
67 | ret = 0; | |
68 | } else { | |
69 | debug("Can't get random UUID.\n"); | |
8b096237 | 70 | } |
39206382 PM |
71 | #else |
72 | debug("%s unset.\n", str); | |
73 | #endif | |
74 | } else { | |
75 | debug("%s get from environment.\n", str); | |
76 | ret = 0; | |
8b096237 PW |
77 | } |
78 | ||
39206382 PM |
79 | *env = e; |
80 | free(s); | |
81 | ||
82 | return ret; | |
8b096237 PW |
83 | } |
84 | ||
85 | /** | |
86 | * extract_val(): Extract value from a key=value pair list (comma separated). | |
87 | * Only value for the given key is returend. | |
88 | * Function allocates memory for the value, remember to free! | |
89 | * | |
90 | * @param str - pointer to string with key=values pairs | |
91 | * @param key - pointer to the key to search for | |
92 | * | |
93 | * @return - pointer to allocated string with the value | |
94 | */ | |
95 | static char *extract_val(const char *str, const char *key) | |
96 | { | |
97 | char *v, *k; | |
98 | char *s, *strcopy; | |
99 | char *new = NULL; | |
100 | ||
101 | strcopy = strdup(str); | |
102 | if (strcopy == NULL) | |
103 | return NULL; | |
104 | ||
105 | s = strcopy; | |
106 | while (s) { | |
107 | v = strsep(&s, ","); | |
108 | if (!v) | |
109 | break; | |
110 | k = strsep(&v, "="); | |
111 | if (!k) | |
112 | break; | |
113 | if (strcmp(k, key) == 0) { | |
114 | new = strdup(v); | |
115 | break; | |
116 | } | |
117 | } | |
118 | ||
119 | free(strcopy); | |
120 | ||
121 | return new; | |
122 | } | |
123 | ||
cfdaf4ca PD |
124 | /** |
125 | * found_key(): Found key without value in parameter list (comma separated). | |
126 | * | |
127 | * @param str - pointer to string with key | |
128 | * @param key - pointer to the key to search for | |
129 | * | |
130 | * @return - true on found key | |
131 | */ | |
132 | static bool found_key(const char *str, const char *key) | |
133 | { | |
134 | char *k; | |
135 | char *s, *strcopy; | |
136 | bool result = false; | |
137 | ||
138 | strcopy = strdup(str); | |
139 | if (!strcopy) | |
140 | return NULL; | |
141 | ||
142 | s = strcopy; | |
143 | while (s) { | |
144 | k = strsep(&s, ","); | |
145 | if (!k) | |
146 | break; | |
147 | if (strcmp(k, key) == 0) { | |
148 | result = true; | |
149 | break; | |
150 | } | |
151 | } | |
152 | ||
153 | free(strcopy); | |
154 | ||
155 | return result; | |
156 | } | |
157 | ||
8b096237 PW |
158 | /** |
159 | * set_gpt_info(): Fill partition information from string | |
160 | * function allocates memory, remember to free! | |
161 | * | |
162 | * @param dev_desc - pointer block device descriptor | |
163 | * @param str_part - pointer to string with partition information | |
164 | * @param str_disk_guid - pointer to pointer to allocated string with disk guid | |
165 | * @param partitions - pointer to pointer to allocated partitions array | |
166 | * @param parts_count - number of partitions | |
167 | * | |
168 | * @return - zero on success, otherwise error | |
169 | * | |
170 | */ | |
4101f687 | 171 | static int set_gpt_info(struct blk_desc *dev_desc, |
8b096237 PW |
172 | const char *str_part, |
173 | char **str_disk_guid, | |
174 | disk_partition_t **partitions, | |
175 | u8 *parts_count) | |
176 | { | |
177 | char *tok, *str, *s; | |
178 | int i; | |
179 | char *val, *p; | |
180 | int p_count; | |
181 | disk_partition_t *parts; | |
182 | int errno = 0; | |
3e34cf7b | 183 | uint64_t size_ll, start_ll; |
8b096237 | 184 | |
619f0fdf | 185 | debug("%s: lba num: 0x%x %d\n", __func__, |
8b096237 PW |
186 | (unsigned int)dev_desc->lba, (unsigned int)dev_desc->lba); |
187 | ||
188 | if (str_part == NULL) | |
189 | return -1; | |
190 | ||
191 | str = strdup(str_part); | |
192 | ||
193 | /* extract disk guid */ | |
194 | s = str; | |
0c7e8d13 | 195 | val = extract_val(str, "uuid_disk"); |
8b096237 | 196 | if (!val) { |
0c7e8d13 RH |
197 | #ifdef CONFIG_RANDOM_UUID |
198 | *str_disk_guid = malloc(UUID_STR_LEN + 1); | |
199 | gen_rand_uuid_str(*str_disk_guid, UUID_STR_FORMAT_STD); | |
200 | #else | |
8b096237 PW |
201 | free(str); |
202 | return -2; | |
0c7e8d13 RH |
203 | #endif |
204 | } else { | |
205 | val = strsep(&val, ";"); | |
206 | if (extract_env(val, &p)) | |
207 | p = val; | |
208 | *str_disk_guid = strdup(p); | |
209 | free(val); | |
210 | /* Move s to first partition */ | |
211 | strsep(&s, ";"); | |
8b096237 | 212 | } |
8b096237 PW |
213 | if (strlen(s) == 0) |
214 | return -3; | |
215 | ||
216 | i = strlen(s) - 1; | |
217 | if (s[i] == ';') | |
218 | s[i] = '\0'; | |
219 | ||
220 | /* calculate expected number of partitions */ | |
221 | p_count = 1; | |
222 | p = s; | |
223 | while (*p) { | |
224 | if (*p++ == ';') | |
225 | p_count++; | |
226 | } | |
227 | ||
228 | /* allocate memory for partitions */ | |
229 | parts = calloc(sizeof(disk_partition_t), p_count); | |
230 | ||
1f8b546f | 231 | /* retrieve partitions data from string */ |
8b096237 PW |
232 | for (i = 0; i < p_count; i++) { |
233 | tok = strsep(&s, ";"); | |
234 | ||
235 | if (tok == NULL) | |
236 | break; | |
237 | ||
238 | /* uuid */ | |
239 | val = extract_val(tok, "uuid"); | |
0c7e8d13 RH |
240 | if (!val) { |
241 | /* 'uuid' is optional if random uuid's are enabled */ | |
242 | #ifdef CONFIG_RANDOM_UUID | |
243 | gen_rand_uuid_str(parts[i].uuid, UUID_STR_FORMAT_STD); | |
244 | #else | |
8b096237 PW |
245 | errno = -4; |
246 | goto err; | |
0c7e8d13 RH |
247 | #endif |
248 | } else { | |
249 | if (extract_env(val, &p)) | |
250 | p = val; | |
251 | if (strlen(p) >= sizeof(parts[i].uuid)) { | |
252 | printf("Wrong uuid format for partition %d\n", i); | |
253 | errno = -4; | |
254 | goto err; | |
255 | } | |
256 | strcpy((char *)parts[i].uuid, p); | |
257 | free(val); | |
8b096237 | 258 | } |
7561b258 PD |
259 | #ifdef CONFIG_PARTITION_TYPE_GUID |
260 | /* guid */ | |
261 | val = extract_val(tok, "type"); | |
262 | if (val) { | |
263 | /* 'type' is optional */ | |
264 | if (extract_env(val, &p)) | |
265 | p = val; | |
266 | if (strlen(p) >= sizeof(parts[i].type_guid)) { | |
267 | printf("Wrong type guid format for partition %d\n", | |
268 | i); | |
269 | errno = -4; | |
270 | goto err; | |
271 | } | |
272 | strcpy((char *)parts[i].type_guid, p); | |
273 | free(val); | |
274 | } | |
275 | #endif | |
8b096237 PW |
276 | /* name */ |
277 | val = extract_val(tok, "name"); | |
278 | if (!val) { /* name is mandatory */ | |
279 | errno = -4; | |
280 | goto err; | |
281 | } | |
282 | if (extract_env(val, &p)) | |
283 | p = val; | |
284 | if (strlen(p) >= sizeof(parts[i].name)) { | |
285 | errno = -4; | |
286 | goto err; | |
287 | } | |
288 | strcpy((char *)parts[i].name, p); | |
289 | free(val); | |
290 | ||
291 | /* size */ | |
292 | val = extract_val(tok, "size"); | |
293 | if (!val) { /* 'size' is mandatory */ | |
294 | errno = -4; | |
295 | goto err; | |
296 | } | |
297 | if (extract_env(val, &p)) | |
298 | p = val; | |
3e34cf7b PW |
299 | size_ll = ustrtoull(p, &p, 0); |
300 | parts[i].size = lldiv(size_ll, dev_desc->blksz); | |
8b096237 PW |
301 | free(val); |
302 | ||
303 | /* start address */ | |
304 | val = extract_val(tok, "start"); | |
305 | if (val) { /* start address is optional */ | |
306 | if (extract_env(val, &p)) | |
307 | p = val; | |
3e34cf7b PW |
308 | start_ll = ustrtoull(p, &p, 0); |
309 | parts[i].start = lldiv(start_ll, dev_desc->blksz); | |
8b096237 PW |
310 | free(val); |
311 | } | |
cfdaf4ca PD |
312 | |
313 | /* bootable */ | |
314 | if (found_key(tok, "bootable")) | |
315 | parts[i].bootable = 1; | |
8b096237 PW |
316 | } |
317 | ||
318 | *parts_count = p_count; | |
319 | *partitions = parts; | |
320 | free(str); | |
321 | ||
322 | return 0; | |
323 | err: | |
324 | free(str); | |
325 | free(*str_disk_guid); | |
326 | free(parts); | |
327 | ||
328 | return errno; | |
329 | } | |
330 | ||
4101f687 | 331 | static int gpt_default(struct blk_desc *blk_dev_desc, const char *str_part) |
8b096237 PW |
332 | { |
333 | int ret; | |
334 | char *str_disk_guid; | |
335 | u8 part_count = 0; | |
336 | disk_partition_t *partitions = NULL; | |
337 | ||
8b096237 | 338 | /* fill partitions */ |
619f0fdf | 339 | ret = set_gpt_info(blk_dev_desc, str_part, |
8b096237 PW |
340 | &str_disk_guid, &partitions, &part_count); |
341 | if (ret) { | |
342 | if (ret == -1) | |
343 | printf("No partition list provided\n"); | |
344 | if (ret == -2) | |
345 | printf("Missing disk guid\n"); | |
346 | if ((ret == -3) || (ret == -4)) | |
347 | printf("Partition list incomplete\n"); | |
348 | return -1; | |
349 | } | |
350 | ||
351 | /* save partitions layout to disk */ | |
a150e6c9 | 352 | ret = gpt_restore(blk_dev_desc, str_disk_guid, partitions, part_count); |
8b096237 PW |
353 | free(str_disk_guid); |
354 | free(partitions); | |
355 | ||
a150e6c9 | 356 | return ret; |
8b096237 PW |
357 | } |
358 | ||
4101f687 | 359 | static int gpt_verify(struct blk_desc *blk_dev_desc, const char *str_part) |
bbb9ffac LM |
360 | { |
361 | ALLOC_CACHE_ALIGN_BUFFER_PAD(gpt_header, gpt_head, 1, | |
362 | blk_dev_desc->blksz); | |
363 | disk_partition_t *partitions = NULL; | |
364 | gpt_entry *gpt_pte = NULL; | |
365 | char *str_disk_guid; | |
366 | u8 part_count = 0; | |
367 | int ret = 0; | |
368 | ||
369 | /* fill partitions */ | |
370 | ret = set_gpt_info(blk_dev_desc, str_part, | |
371 | &str_disk_guid, &partitions, &part_count); | |
372 | if (ret) { | |
373 | if (ret == -1) { | |
374 | printf("No partition list provided - only basic check\n"); | |
375 | ret = gpt_verify_headers(blk_dev_desc, gpt_head, | |
376 | &gpt_pte); | |
377 | goto out; | |
378 | } | |
379 | if (ret == -2) | |
380 | printf("Missing disk guid\n"); | |
381 | if ((ret == -3) || (ret == -4)) | |
382 | printf("Partition list incomplete\n"); | |
383 | return -1; | |
384 | } | |
385 | ||
386 | /* Check partition layout with provided pattern */ | |
387 | ret = gpt_verify_partitions(blk_dev_desc, partitions, part_count, | |
388 | gpt_head, &gpt_pte); | |
389 | free(str_disk_guid); | |
390 | free(partitions); | |
391 | out: | |
392 | free(gpt_pte); | |
393 | return ret; | |
394 | } | |
395 | ||
8b096237 PW |
396 | /** |
397 | * do_gpt(): Perform GPT operations | |
398 | * | |
399 | * @param cmdtp - command name | |
400 | * @param flag | |
401 | * @param argc | |
402 | * @param argv | |
403 | * | |
404 | * @return zero on success; otherwise error | |
405 | */ | |
406 | static int do_gpt(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) | |
407 | { | |
408 | int ret = CMD_RET_SUCCESS; | |
409 | int dev = 0; | |
619f0fdf | 410 | char *ep; |
4101f687 | 411 | struct blk_desc *blk_dev_desc = NULL; |
8b096237 | 412 | |
bbb9ffac | 413 | if (argc < 4 || argc > 5) |
8b096237 PW |
414 | return CMD_RET_USAGE; |
415 | ||
bbb9ffac LM |
416 | dev = (int)simple_strtoul(argv[3], &ep, 10); |
417 | if (!ep || ep[0] != '\0') { | |
418 | printf("'%s' is not a number\n", argv[3]); | |
419 | return CMD_RET_USAGE; | |
420 | } | |
db1d9e78 | 421 | blk_dev_desc = blk_get_dev(argv[2], dev); |
bbb9ffac LM |
422 | if (!blk_dev_desc) { |
423 | printf("%s: %s dev %d NOT available\n", | |
424 | __func__, argv[2], dev); | |
425 | return CMD_RET_FAILURE; | |
426 | } | |
39206382 | 427 | |
bbb9ffac LM |
428 | if ((strcmp(argv[1], "write") == 0) && (argc == 5)) { |
429 | printf("Writing GPT: "); | |
39206382 | 430 | ret = gpt_default(blk_dev_desc, argv[4]); |
bbb9ffac LM |
431 | } else if ((strcmp(argv[1], "verify") == 0)) { |
432 | ret = gpt_verify(blk_dev_desc, argv[4]); | |
433 | printf("Verify GPT: "); | |
8b096237 PW |
434 | } else { |
435 | return CMD_RET_USAGE; | |
436 | } | |
bbb9ffac LM |
437 | |
438 | if (ret) { | |
439 | printf("error!\n"); | |
440 | return CMD_RET_FAILURE; | |
441 | } | |
442 | ||
443 | printf("success!\n"); | |
444 | return CMD_RET_SUCCESS; | |
8b096237 PW |
445 | } |
446 | ||
447 | U_BOOT_CMD(gpt, CONFIG_SYS_MAXARGS, 1, do_gpt, | |
448 | "GUID Partition Table", | |
1f8b546f | 449 | "<command> <interface> <dev> <partitions_list>\n" |
74f889b0 LM |
450 | " - GUID partition table restoration and validity check\n" |
451 | " Restore or verify GPT information on a device connected\n" | |
8b096237 | 452 | " to interface\n" |
74f889b0 LM |
453 | " Example usage:\n" |
454 | " gpt write mmc 0 $partitions\n" | |
455 | " gpt verify mmc 0 $partitions\n" | |
8b096237 | 456 | ); |