| // SPDX-License-Identifier: GPL-2.0+ |
| /* |
| * cmd_gpt.c -- GPT (GUID Partition Table) handling command |
| * |
| * Copyright (C) 2015 |
| * Lukasz Majewski <l.majewski@majess.pl> |
| * |
| * Copyright (C) 2012 Samsung Electronics |
| * author: Lukasz Majewski <l.majewski@samsung.com> |
| * author: Piotr Wilczek <p.wilczek@samsung.com> |
| */ |
| |
| #include <common.h> |
| #include <malloc.h> |
| #include <command.h> |
| #include <part_efi.h> |
| #include <exports.h> |
| #include <linux/ctype.h> |
| #include <div64.h> |
| #include <memalign.h> |
| #include <linux/compat.h> |
| #include <linux/sizes.h> |
| #include <stdlib.h> |
| |
| static LIST_HEAD(disk_partitions); |
| |
| /** |
| * extract_env(): Expand env name from string format '&{env_name}' |
| * and return pointer to the env (if the env is set) |
| * |
| * @param str - pointer to string |
| * @param env - pointer to pointer to extracted env |
| * |
| * @return - zero on successful expand and env is set |
| */ |
| static int extract_env(const char *str, char **env) |
| { |
| int ret = -1; |
| char *e, *s; |
| #ifdef CONFIG_RANDOM_UUID |
| char uuid_str[UUID_STR_LEN + 1]; |
| #endif |
| |
| if (!str || strlen(str) < 4) |
| return -1; |
| |
| if (!((strncmp(str, "${", 2) == 0) && (str[strlen(str) - 1] == '}'))) |
| return -1; |
| |
| s = strdup(str); |
| if (s == NULL) |
| return -1; |
| |
| memset(s + strlen(s) - 1, '\0', 1); |
| memmove(s, s + 2, strlen(s) - 1); |
| |
| e = env_get(s); |
| if (e == NULL) { |
| #ifdef CONFIG_RANDOM_UUID |
| debug("%s unset. ", str); |
| gen_rand_uuid_str(uuid_str, UUID_STR_FORMAT_GUID); |
| env_set(s, uuid_str); |
| |
| e = env_get(s); |
| if (e) { |
| debug("Set to random.\n"); |
| ret = 0; |
| } else { |
| debug("Can't get random UUID.\n"); |
| } |
| #else |
| debug("%s unset.\n", str); |
| #endif |
| } else { |
| debug("%s get from environment.\n", str); |
| ret = 0; |
| } |
| |
| *env = e; |
| free(s); |
| |
| return ret; |
| } |
| |
| /** |
| * extract_val(): Extract value from a key=value pair list (comma separated). |
| * Only value for the given key is returend. |
| * Function allocates memory for the value, remember to free! |
| * |
| * @param str - pointer to string with key=values pairs |
| * @param key - pointer to the key to search for |
| * |
| * @return - pointer to allocated string with the value |
| */ |
| static char *extract_val(const char *str, const char *key) |
| { |
| char *v, *k; |
| char *s, *strcopy; |
| char *new = NULL; |
| |
| strcopy = strdup(str); |
| if (strcopy == NULL) |
| return NULL; |
| |
| s = strcopy; |
| while (s) { |
| v = strsep(&s, ","); |
| if (!v) |
| break; |
| k = strsep(&v, "="); |
| if (!k) |
| break; |
| if (strcmp(k, key) == 0) { |
| new = strdup(v); |
| break; |
| } |
| } |
| |
| free(strcopy); |
| |
| return new; |
| } |
| |
| /** |
| * found_key(): Found key without value in parameter list (comma separated). |
| * |
| * @param str - pointer to string with key |
| * @param key - pointer to the key to search for |
| * |
| * @return - true on found key |
| */ |
| static bool found_key(const char *str, const char *key) |
| { |
| char *k; |
| char *s, *strcopy; |
| bool result = false; |
| |
| strcopy = strdup(str); |
| if (!strcopy) |
| return NULL; |
| |
| s = strcopy; |
| while (s) { |
| k = strsep(&s, ","); |
| if (!k) |
| break; |
| if (strcmp(k, key) == 0) { |
| result = true; |
| break; |
| } |
| } |
| |
| free(strcopy); |
| |
| return result; |
| } |
| |
| static int calc_parts_list_len(int numparts) |
| { |
| int partlistlen = UUID_STR_LEN + 1 + strlen("uuid_disk="); |
| /* for the comma */ |
| partlistlen++; |
| |
| /* per-partition additions; numparts starts at 1, so this should be correct */ |
| partlistlen += numparts * (strlen("name=,") + PART_NAME_LEN + 1); |
| /* see part.h for definition of struct disk_partition */ |
| partlistlen += numparts * (strlen("start=MiB,") + sizeof(lbaint_t) + 1); |
| partlistlen += numparts * (strlen("size=MiB,") + sizeof(lbaint_t) + 1); |
| partlistlen += numparts * (strlen("uuid=;") + UUID_STR_LEN + 1); |
| /* for the terminating null */ |
| partlistlen++; |
| debug("Length of partitions_list is %d for %d partitions\n", partlistlen, |
| numparts); |
| return partlistlen; |
| } |
| |
| #ifdef CONFIG_CMD_GPT_RENAME |
| static void del_gpt_info(void) |
| { |
| struct list_head *pos = &disk_partitions; |
| struct disk_part *curr; |
| while (!list_empty(pos)) { |
| curr = list_entry(pos->next, struct disk_part, list); |
| list_del(pos->next); |
| free(curr); |
| } |
| } |
| |
| static struct disk_part *allocate_disk_part(disk_partition_t *info, int partnum) |
| { |
| struct disk_part *newpart; |
| newpart = calloc(1, sizeof(struct disk_part)); |
| if (!newpart) |
| return ERR_PTR(-ENOMEM); |
| |
| newpart->gpt_part_info.start = info->start; |
| newpart->gpt_part_info.size = info->size; |
| newpart->gpt_part_info.blksz = info->blksz; |
| strncpy((char *)newpart->gpt_part_info.name, (const char *)info->name, |
| PART_NAME_LEN); |
| newpart->gpt_part_info.name[PART_NAME_LEN - 1] = '\0'; |
| strncpy((char *)newpart->gpt_part_info.type, (const char *)info->type, |
| PART_TYPE_LEN); |
| newpart->gpt_part_info.type[PART_TYPE_LEN - 1] = '\0'; |
| newpart->gpt_part_info.bootable = info->bootable; |
| #ifdef CONFIG_PARTITION_UUIDS |
| strncpy(newpart->gpt_part_info.uuid, (const char *)info->uuid, |
| UUID_STR_LEN); |
| /* UUID_STR_LEN is correct, as uuid[]'s length is UUID_STR_LEN+1 chars */ |
| newpart->gpt_part_info.uuid[UUID_STR_LEN] = '\0'; |
| #endif |
| newpart->partnum = partnum; |
| |
| return newpart; |
| } |
| |
| static void prettyprint_part_size(char *sizestr, lbaint_t partsize, |
| lbaint_t blksize) |
| { |
| unsigned long long partbytes, partmegabytes; |
| |
| partbytes = partsize * blksize; |
| partmegabytes = lldiv(partbytes, SZ_1M); |
| snprintf(sizestr, 16, "%lluMiB", partmegabytes); |
| } |
| |
| static void print_gpt_info(void) |
| { |
| struct list_head *pos; |
| struct disk_part *curr; |
| char partstartstr[16]; |
| char partsizestr[16]; |
| |
| list_for_each(pos, &disk_partitions) { |
| curr = list_entry(pos, struct disk_part, list); |
| prettyprint_part_size(partstartstr, curr->gpt_part_info.start, |
| curr->gpt_part_info.blksz); |
| prettyprint_part_size(partsizestr, curr->gpt_part_info.size, |
| curr->gpt_part_info.blksz); |
| |
| printf("Partition %d:\n", curr->partnum); |
| printf("Start %s, size %s\n", partstartstr, partsizestr); |
| printf("Block size %lu, name %s\n", curr->gpt_part_info.blksz, |
| curr->gpt_part_info.name); |
| printf("Type %s, bootable %d\n", curr->gpt_part_info.type, |
| curr->gpt_part_info.bootable); |
| #ifdef CONFIG_PARTITION_UUIDS |
| printf("UUID %s\n", curr->gpt_part_info.uuid); |
| #endif |
| printf("\n"); |
| } |
| } |
| |
| /* |
| * create the string that upstream 'gpt write' command will accept as an |
| * argument |
| * |
| * From doc/README.gpt, Format of partitions layout: |
| * "uuid_disk=...;name=u-boot,size=60MiB,uuid=...; |
| * name=kernel,size=60MiB,uuid=...;" |
| * The fields 'name' and 'size' are mandatory for every partition. |
| * The field 'start' is optional. The fields 'uuid' and 'uuid_disk' |
| * are optional if CONFIG_RANDOM_UUID is enabled. |
| */ |
| static int create_gpt_partitions_list(int numparts, const char *guid, |
| char *partitions_list) |
| { |
| struct list_head *pos; |
| struct disk_part *curr; |
| char partstr[PART_NAME_LEN + 1]; |
| |
| if (!partitions_list) |
| return -EINVAL; |
| |
| strcpy(partitions_list, "uuid_disk="); |
| strncat(partitions_list, guid, UUID_STR_LEN + 1); |
| strcat(partitions_list, ";"); |
| |
| list_for_each(pos, &disk_partitions) { |
| curr = list_entry(pos, struct disk_part, list); |
| strcat(partitions_list, "name="); |
| strncat(partitions_list, (const char *)curr->gpt_part_info.name, |
| PART_NAME_LEN + 1); |
| sprintf(partstr, ",start=0x%llx", |
| (unsigned long long)curr->gpt_part_info.start * |
| curr->gpt_part_info.blksz); |
| /* one extra byte for NULL */ |
| strncat(partitions_list, partstr, PART_NAME_LEN + 1); |
| sprintf(partstr, ",size=0x%llx", |
| (unsigned long long)curr->gpt_part_info.size * |
| curr->gpt_part_info.blksz); |
| strncat(partitions_list, partstr, PART_NAME_LEN + 1); |
| |
| strcat(partitions_list, ",uuid="); |
| strncat(partitions_list, curr->gpt_part_info.uuid, |
| UUID_STR_LEN + 1); |
| strcat(partitions_list, ";"); |
| } |
| return 0; |
| } |
| |
| /* |
| * read partition info into disk_partitions list where |
| * it can be printed or modified |
| */ |
| static int get_gpt_info(struct blk_desc *dev_desc) |
| { |
| /* start partition numbering at 1, as U-Boot does */ |
| int valid_parts = 0, p, ret; |
| disk_partition_t info; |
| struct disk_part *new_disk_part; |
| |
| /* |
| * Always re-read partition info from device, in case |
| * it has changed |
| */ |
| INIT_LIST_HEAD(&disk_partitions); |
| |
| for (p = 1; p <= MAX_SEARCH_PARTITIONS; p++) { |
| ret = part_get_info(dev_desc, p, &info); |
| if (ret) |
| continue; |
| |
| /* Add 1 here because counter is zero-based but p1 is |
| the first partition */ |
| new_disk_part = allocate_disk_part(&info, valid_parts+1); |
| if (IS_ERR(new_disk_part)) |
| goto out; |
| |
| list_add_tail(&new_disk_part->list, &disk_partitions); |
| valid_parts++; |
| } |
| if (valid_parts == 0) { |
| printf("** No valid partitions found **\n"); |
| goto out; |
| } |
| return valid_parts; |
| out: |
| if (valid_parts >= 1) |
| del_gpt_info(); |
| return -ENODEV; |
| } |
| |
| /* a wrapper to test get_gpt_info */ |
| static int do_get_gpt_info(struct blk_desc *dev_desc) |
| { |
| int ret; |
| |
| ret = get_gpt_info(dev_desc); |
| if (ret > 0) { |
| print_gpt_info(); |
| del_gpt_info(); |
| return 0; |
| } |
| return ret; |
| } |
| #endif |
| |
| /** |
| * set_gpt_info(): Fill partition information from string |
| * function allocates memory, remember to free! |
| * |
| * @param dev_desc - pointer block device descriptor |
| * @param str_part - pointer to string with partition information |
| * @param str_disk_guid - pointer to pointer to allocated string with disk guid |
| * @param partitions - pointer to pointer to allocated partitions array |
| * @param parts_count - number of partitions |
| * |
| * @return - zero on success, otherwise error |
| * |
| */ |
| static int set_gpt_info(struct blk_desc *dev_desc, |
| const char *str_part, |
| char **str_disk_guid, |
| disk_partition_t **partitions, |
| u8 *parts_count) |
| { |
| char *tok, *str, *s; |
| int i; |
| char *val, *p; |
| int p_count; |
| disk_partition_t *parts; |
| int errno = 0; |
| uint64_t size_ll, start_ll; |
| lbaint_t offset = 0; |
| int max_str_part = calc_parts_list_len(MAX_SEARCH_PARTITIONS); |
| |
| debug("%s: lba num: 0x%x %d\n", __func__, |
| (unsigned int)dev_desc->lba, (unsigned int)dev_desc->lba); |
| |
| if (str_part == NULL) |
| return -1; |
| |
| str = strdup(str_part); |
| if (str == NULL) |
| return -ENOMEM; |
| |
| /* extract disk guid */ |
| s = str; |
| val = extract_val(str, "uuid_disk"); |
| if (!val) { |
| #ifdef CONFIG_RANDOM_UUID |
| *str_disk_guid = malloc(UUID_STR_LEN + 1); |
| if (*str_disk_guid == NULL) |
| return -ENOMEM; |
| gen_rand_uuid_str(*str_disk_guid, UUID_STR_FORMAT_STD); |
| #else |
| free(str); |
| return -2; |
| #endif |
| } else { |
| val = strsep(&val, ";"); |
| if (extract_env(val, &p)) |
| p = val; |
| *str_disk_guid = strdup(p); |
| free(val); |
| /* Move s to first partition */ |
| strsep(&s, ";"); |
| } |
| if (s == NULL) { |
| printf("Error: is the partitions string NULL-terminated?\n"); |
| return -EINVAL; |
| } |
| if (strnlen(s, max_str_part) == 0) |
| return -3; |
| |
| i = strnlen(s, max_str_part) - 1; |
| if (s[i] == ';') |
| s[i] = '\0'; |
| |
| /* calculate expected number of partitions */ |
| p_count = 1; |
| p = s; |
| while (*p) { |
| if (*p++ == ';') |
| p_count++; |
| } |
| |
| /* allocate memory for partitions */ |
| parts = calloc(sizeof(disk_partition_t), p_count); |
| if (parts == NULL) |
| return -ENOMEM; |
| |
| /* retrieve partitions data from string */ |
| for (i = 0; i < p_count; i++) { |
| tok = strsep(&s, ";"); |
| |
| if (tok == NULL) |
| break; |
| |
| /* uuid */ |
| val = extract_val(tok, "uuid"); |
| if (!val) { |
| /* 'uuid' is optional if random uuid's are enabled */ |
| #ifdef CONFIG_RANDOM_UUID |
| gen_rand_uuid_str(parts[i].uuid, UUID_STR_FORMAT_STD); |
| #else |
| errno = -4; |
| goto err; |
| #endif |
| } else { |
| if (extract_env(val, &p)) |
| p = val; |
| if (strnlen(p, max_str_part) >= sizeof(parts[i].uuid)) { |
| printf("Wrong uuid format for partition %d\n", i); |
| errno = -4; |
| goto err; |
| } |
| strncpy((char *)parts[i].uuid, p, max_str_part); |
| free(val); |
| } |
| #ifdef CONFIG_PARTITION_TYPE_GUID |
| /* guid */ |
| val = extract_val(tok, "type"); |
| if (val) { |
| /* 'type' is optional */ |
| if (extract_env(val, &p)) |
| p = val; |
| if (strnlen(p, max_str_part) >= sizeof(parts[i].type_guid)) { |
| printf("Wrong type guid format for partition %d\n", |
| i); |
| errno = -4; |
| goto err; |
| } |
| strncpy((char *)parts[i].type_guid, p, max_str_part); |
| free(val); |
| } |
| #endif |
| /* name */ |
| val = extract_val(tok, "name"); |
| if (!val) { /* name is mandatory */ |
| errno = -4; |
| goto err; |
| } |
| if (extract_env(val, &p)) |
| p = val; |
| if (strnlen(p, max_str_part) >= sizeof(parts[i].name)) { |
| errno = -4; |
| goto err; |
| } |
| strncpy((char *)parts[i].name, p, max_str_part); |
| free(val); |
| |
| /* size */ |
| val = extract_val(tok, "size"); |
| if (!val) { /* 'size' is mandatory */ |
| errno = -4; |
| goto err; |
| } |
| if (extract_env(val, &p)) |
| p = val; |
| if ((strcmp(p, "-") == 0)) { |
| /* Let part efi module to auto extend the size */ |
| parts[i].size = 0; |
| } else { |
| size_ll = ustrtoull(p, &p, 0); |
| parts[i].size = lldiv(size_ll, dev_desc->blksz); |
| } |
| |
| free(val); |
| |
| /* start address */ |
| val = extract_val(tok, "start"); |
| if (val) { /* start address is optional */ |
| if (extract_env(val, &p)) |
| p = val; |
| start_ll = ustrtoull(p, &p, 0); |
| parts[i].start = lldiv(start_ll, dev_desc->blksz); |
| free(val); |
| } |
| |
| offset += parts[i].size + parts[i].start; |
| |
| /* bootable */ |
| if (found_key(tok, "bootable")) |
| parts[i].bootable = 1; |
| } |
| |
| *parts_count = p_count; |
| *partitions = parts; |
| free(str); |
| |
| return 0; |
| err: |
| free(str); |
| free(*str_disk_guid); |
| free(parts); |
| |
| return errno; |
| } |
| |
| static int gpt_default(struct blk_desc *blk_dev_desc, const char *str_part) |
| { |
| int ret; |
| char *str_disk_guid; |
| u8 part_count = 0; |
| disk_partition_t *partitions = NULL; |
| |
| if (!str_part) |
| return -1; |
| |
| /* fill partitions */ |
| ret = set_gpt_info(blk_dev_desc, str_part, |
| &str_disk_guid, &partitions, &part_count); |
| if (ret) { |
| if (ret == -1) |
| printf("No partition list provided\n"); |
| if (ret == -2) |
| printf("Missing disk guid\n"); |
| if ((ret == -3) || (ret == -4)) |
| printf("Partition list incomplete\n"); |
| return -1; |
| } |
| |
| /* save partitions layout to disk */ |
| ret = gpt_restore(blk_dev_desc, str_disk_guid, partitions, part_count); |
| free(str_disk_guid); |
| free(partitions); |
| |
| return ret; |
| } |
| |
| static int gpt_verify(struct blk_desc *blk_dev_desc, const char *str_part) |
| { |
| ALLOC_CACHE_ALIGN_BUFFER_PAD(gpt_header, gpt_head, 1, |
| blk_dev_desc->blksz); |
| disk_partition_t *partitions = NULL; |
| gpt_entry *gpt_pte = NULL; |
| char *str_disk_guid; |
| u8 part_count = 0; |
| int ret = 0; |
| |
| if (!str_part) |
| return -1; |
| |
| /* fill partitions */ |
| ret = set_gpt_info(blk_dev_desc, str_part, |
| &str_disk_guid, &partitions, &part_count); |
| if (ret) { |
| if (ret == -1) { |
| printf("No partition list provided - only basic check\n"); |
| ret = gpt_verify_headers(blk_dev_desc, gpt_head, |
| &gpt_pte); |
| goto out; |
| } |
| if (ret == -2) |
| printf("Missing disk guid\n"); |
| if ((ret == -3) || (ret == -4)) |
| printf("Partition list incomplete\n"); |
| return -1; |
| } |
| |
| /* Check partition layout with provided pattern */ |
| ret = gpt_verify_partitions(blk_dev_desc, partitions, part_count, |
| gpt_head, &gpt_pte); |
| free(str_disk_guid); |
| free(partitions); |
| out: |
| free(gpt_pte); |
| return ret; |
| } |
| |
| static int do_disk_guid(struct blk_desc *dev_desc, char * const namestr) |
| { |
| int ret; |
| char disk_guid[UUID_STR_LEN + 1]; |
| |
| ret = get_disk_guid(dev_desc, disk_guid); |
| if (ret < 0) |
| return CMD_RET_FAILURE; |
| |
| if (namestr) |
| env_set(namestr, disk_guid); |
| else |
| printf("%s\n", disk_guid); |
| |
| return ret; |
| } |
| |
| #ifdef CONFIG_CMD_GPT_RENAME |
| static int do_rename_gpt_parts(struct blk_desc *dev_desc, char *subcomm, |
| char *name1, char *name2) |
| { |
| struct list_head *pos; |
| struct disk_part *curr; |
| disk_partition_t *new_partitions = NULL; |
| char disk_guid[UUID_STR_LEN + 1]; |
| char *partitions_list, *str_disk_guid = NULL; |
| u8 part_count = 0; |
| int partlistlen, ret, numparts = 0, partnum, i = 1, ctr1 = 0, ctr2 = 0; |
| |
| if ((subcomm == NULL) || (name1 == NULL) || (name2 == NULL) || |
| (strcmp(subcomm, "swap") && (strcmp(subcomm, "rename")))) |
| return -EINVAL; |
| |
| ret = get_disk_guid(dev_desc, disk_guid); |
| if (ret < 0) |
| return ret; |
| /* |
| * Allocates disk_partitions, requiring matching call to del_gpt_info() |
| * if successful. |
| */ |
| numparts = get_gpt_info(dev_desc); |
| if (numparts <= 0) |
| return numparts ? numparts : -ENODEV; |
| |
| partlistlen = calc_parts_list_len(numparts); |
| partitions_list = malloc(partlistlen); |
| if (!partitions_list) { |
| del_gpt_info(); |
| return -ENOMEM; |
| } |
| memset(partitions_list, '\0', partlistlen); |
| |
| ret = create_gpt_partitions_list(numparts, disk_guid, partitions_list); |
| if (ret < 0) { |
| free(partitions_list); |
| return ret; |
| } |
| /* |
| * Uncomment the following line to print a string that 'gpt write' |
| * or 'gpt verify' will accept as input. |
| */ |
| debug("OLD partitions_list is %s with %u chars\n", partitions_list, |
| (unsigned)strlen(partitions_list)); |
| |
| /* set_gpt_info allocates new_partitions and str_disk_guid */ |
| ret = set_gpt_info(dev_desc, partitions_list, &str_disk_guid, |
| &new_partitions, &part_count); |
| if (ret < 0) |
| goto out; |
| |
| if (!strcmp(subcomm, "swap")) { |
| if ((strlen(name1) > PART_NAME_LEN) || (strlen(name2) > PART_NAME_LEN)) { |
| printf("Names longer than %d characters are truncated.\n", PART_NAME_LEN); |
| ret = -EINVAL; |
| goto out; |
| } |
| list_for_each(pos, &disk_partitions) { |
| curr = list_entry(pos, struct disk_part, list); |
| if (!strcmp((char *)curr->gpt_part_info.name, name1)) { |
| strcpy((char *)curr->gpt_part_info.name, name2); |
| ctr1++; |
| } else if (!strcmp((char *)curr->gpt_part_info.name, name2)) { |
| strcpy((char *)curr->gpt_part_info.name, name1); |
| ctr2++; |
| } |
| } |
| if ((ctr1 + ctr2 < 2) || (ctr1 != ctr2)) { |
| printf("Cannot swap partition names except in pairs.\n"); |
| ret = -EINVAL; |
| goto out; |
| } |
| } else { /* rename */ |
| if (strlen(name2) > PART_NAME_LEN) { |
| printf("Names longer than %d characters are truncated.\n", PART_NAME_LEN); |
| ret = -EINVAL; |
| goto out; |
| } |
| partnum = (int)simple_strtol(name1, NULL, 10); |
| if ((partnum < 0) || (partnum > numparts)) { |
| printf("Illegal partition number %s\n", name1); |
| ret = -EINVAL; |
| goto out; |
| } |
| ret = part_get_info(dev_desc, partnum, new_partitions); |
| if (ret < 0) |
| goto out; |
| |
| /* U-Boot partition numbering starts at 1 */ |
| list_for_each(pos, &disk_partitions) { |
| curr = list_entry(pos, struct disk_part, list); |
| if (i == partnum) { |
| strcpy((char *)curr->gpt_part_info.name, name2); |
| break; |
| } |
| i++; |
| } |
| } |
| |
| ret = create_gpt_partitions_list(numparts, disk_guid, partitions_list); |
| if (ret < 0) |
| goto out; |
| debug("NEW partitions_list is %s with %u chars\n", partitions_list, |
| (unsigned)strlen(partitions_list)); |
| |
| ret = set_gpt_info(dev_desc, partitions_list, &str_disk_guid, |
| &new_partitions, &part_count); |
| /* |
| * Even though valid pointers are here passed into set_gpt_info(), |
| * it mallocs again, and there's no way to tell which failed. |
| */ |
| if (ret < 0) |
| goto out; |
| |
| debug("Writing new partition table\n"); |
| ret = gpt_restore(dev_desc, disk_guid, new_partitions, numparts); |
| if (ret < 0) { |
| printf("Writing new partition table failed\n"); |
| goto out; |
| } |
| |
| debug("Reading back new partition table\n"); |
| /* |
| * Empty the existing disk_partitions list, as otherwise the memory in |
| * the original list is unreachable. |
| */ |
| del_gpt_info(); |
| numparts = get_gpt_info(dev_desc); |
| if (numparts <= 0) { |
| ret = numparts ? numparts : -ENODEV; |
| goto out; |
| } |
| printf("new partition table with %d partitions is:\n", numparts); |
| print_gpt_info(); |
| out: |
| del_gpt_info(); |
| #ifdef CONFIG_RANDOM_UUID |
| if (str_disk_guid) |
| free(str_disk_guid); |
| #endif |
| if (new_partitions) |
| free(new_partitions); |
| free(partitions_list); |
| return ret; |
| } |
| #endif |
| |
| /** |
| * do_gpt(): Perform GPT operations |
| * |
| * @param cmdtp - command name |
| * @param flag |
| * @param argc |
| * @param argv |
| * |
| * @return zero on success; otherwise error |
| */ |
| static int do_gpt(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) |
| { |
| int ret = CMD_RET_SUCCESS; |
| int dev = 0; |
| char *ep; |
| struct blk_desc *blk_dev_desc = NULL; |
| |
| #ifndef CONFIG_CMD_GPT_RENAME |
| if (argc < 4 || argc > 5) |
| #else |
| if (argc < 4 || argc > 6) |
| #endif |
| return CMD_RET_USAGE; |
| |
| dev = (int)simple_strtoul(argv[3], &ep, 10); |
| if (!ep || ep[0] != '\0') { |
| printf("'%s' is not a number\n", argv[3]); |
| return CMD_RET_USAGE; |
| } |
| blk_dev_desc = blk_get_dev(argv[2], dev); |
| if (!blk_dev_desc) { |
| printf("%s: %s dev %d NOT available\n", |
| __func__, argv[2], dev); |
| return CMD_RET_FAILURE; |
| } |
| |
| if ((strcmp(argv[1], "write") == 0) && (argc == 5)) { |
| printf("Writing GPT: "); |
| ret = gpt_default(blk_dev_desc, argv[4]); |
| } else if ((strcmp(argv[1], "verify") == 0)) { |
| ret = gpt_verify(blk_dev_desc, argv[4]); |
| printf("Verify GPT: "); |
| } else if (strcmp(argv[1], "guid") == 0) { |
| ret = do_disk_guid(blk_dev_desc, argv[4]); |
| #ifdef CONFIG_CMD_GPT_RENAME |
| } else if (strcmp(argv[1], "read") == 0) { |
| ret = do_get_gpt_info(blk_dev_desc); |
| } else if ((strcmp(argv[1], "swap") == 0) || |
| (strcmp(argv[1], "rename") == 0)) { |
| ret = do_rename_gpt_parts(blk_dev_desc, argv[1], argv[4], argv[5]); |
| #endif |
| } else { |
| return CMD_RET_USAGE; |
| } |
| |
| if (ret) { |
| printf("error!\n"); |
| return CMD_RET_FAILURE; |
| } |
| |
| printf("success!\n"); |
| return CMD_RET_SUCCESS; |
| } |
| |
| U_BOOT_CMD(gpt, CONFIG_SYS_MAXARGS, 1, do_gpt, |
| "GUID Partition Table", |
| "<command> <interface> <dev> <partitions_list>\n" |
| " - GUID partition table restoration and validity check\n" |
| " Restore or verify GPT information on a device connected\n" |
| " to interface\n" |
| " Example usage:\n" |
| " gpt write mmc 0 $partitions\n" |
| " gpt verify mmc 0 $partitions\n" |
| " read <interface> <dev>\n" |
| " - read GPT into a data structure for manipulation\n" |
| " guid <interface> <dev>\n" |
| " - print disk GUID\n" |
| " guid <interface> <dev> <varname>\n" |
| " - set environment variable to disk GUID\n" |
| " Example usage:\n" |
| " gpt guid mmc 0\n" |
| " gpt guid mmc 0 varname\n" |
| #ifdef CONFIG_CMD_GPT_RENAME |
| "gpt partition renaming commands:\n" |
| "gpt swap <interface> <dev> <name1> <name2>\n" |
| " - change all partitions named name1 to name2\n" |
| " and vice-versa\n" |
| "gpt rename <interface> <dev> <part> <name>\n" |
| " - rename the specified partition\n" |
| " Example usage:\n" |
| " gpt swap mmc 0 foo bar\n" |
| " gpt rename mmc 0 3 foo\n" |
| #endif |
| ); |