#include <div64.h>
#include <memalign.h>
#include <linux/compat.h>
+#include <linux/sizes.h>
+#include <stdlib.h>
static LIST_HEAD(disk_partitions);
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("1st block %x, size %x\n", (unsigned)curr->gpt_part_info.start,
- (unsigned)curr->gpt_part_info.size);
+ 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,
}
}
+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;
+}
+
+/*
+ * 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);
+ strcat(partitions_list, ",start=");
+ prettyprint_part_size(partstr, (unsigned long)curr->gpt_part_info.start,
+ (unsigned long) curr->gpt_part_info.blksz);
+ /* one extra byte for NULL */
+ strncat(partitions_list, partstr, PART_NAME_LEN + 1);
+ strcat(partitions_list, ",size=");
+ prettyprint_part_size(partstr, 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
disk_partition_t info;
struct disk_part *new_disk_part;
- if (disk_partitions.next == NULL)
- INIT_LIST_HEAD(&disk_partitions);
+ /*
+ * 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);
return -1;
str = strdup(str_part);
+ if (str == NULL)
+ return -ENOMEM;
/* extract disk guid */
s = str;
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;
+ 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;
+ 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 == NULL)
+ return -ENOMEM;
+ memset(partitions_list, '\0', partlistlen);
+
+ ret = create_gpt_partitions_list(numparts, disk_guid, partitions_list);
+ if (ret < 0)
+ 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));
+
+ ret = set_gpt_info(dev_desc, partitions_list, &str_disk_guid,
+ &new_partitions, &part_count);
+ if (ret < 0)
+ return ret;
+
+ 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);
+ return -EINVAL;
+ }
+ 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");
+ return -EINVAL;
+ }
+ } else { /* rename */
+ if (strlen(name2) > PART_NAME_LEN) {
+ printf("Names longer than %d characters are truncated.\n", PART_NAME_LEN);
+ return -EINVAL;
+ }
+ partnum = (int)simple_strtol(name1, NULL, 10);
+ if ((partnum < 0) || (partnum > numparts)) {
+ printf("Illegal partition number %s\n", name1);
+ return -EINVAL;
+ }
+ ret = part_get_info(dev_desc, partnum, new_partitions);
+ if (ret < 0)
+ return ret;
+
+ /* 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)
+ return ret;
+ 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);
+ if (ret < 0)
+ return ret;
+
+ 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");
+ return ret;
+ }
+
+ debug("Reading back new partition table\n");
+ numparts = get_gpt_info(dev_desc);
+ if (numparts <= 0)
+ return numparts ? numparts : -ENODEV;
+ printf("new partition table with %d partitions is:\n", numparts);
+ print_gpt_info();
+
+ del_gpt_info();
+ free(partitions_list);
+ free(str_disk_guid);
+ free(new_partitions);
+ return ret;
+}
+#endif
+
/**
* do_gpt(): Perform GPT operations
*
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);
#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;
" 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
);
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