Adds a command called "gpt swap-postition" which will swap the order two partitions are listed in the GPT partition table (but leaves them pointing to the same locations on disk).
Signed-off-by: Joshua Watt JPEWhacker@gmail.com --- cmd/gpt.c | 50 ++++++++++++++++++++++++++++++++++++++++++++++++-- 1 file changed, 48 insertions(+), 2 deletions(-)
diff --git a/cmd/gpt.c b/cmd/gpt.c index 58564436d3..c8a2b5ae7b 100644 --- a/cmd/gpt.c +++ b/cmd/gpt.c @@ -859,7 +859,7 @@ static int do_rename_gpt_parts(struct blk_desc *dev_desc, char *subcomm, 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")))) + (strcmp(subcomm, "swap") && strcmp(subcomm, "rename") && strcmp(subcomm, "swap-position"))) return -EINVAL;
ret = get_disk_guid(dev_desc, disk_guid); @@ -920,6 +920,48 @@ static int do_rename_gpt_parts(struct blk_desc *dev_desc, char *subcomm, ret = -EINVAL; goto out; } + } else if(!strcmp(subcomm, "swap-position")) { + int idx1, idx2; + struct disk_partition first, second; + idx1 = simple_strtoul(name1, NULL, 10); + if (idx1 <= 0 || idx1 > numparts) { + printf("Illegal partition number %s\n", name1); + ret = -EINVAL; + goto out; + } + idx2 = simple_strtoul(name2, NULL, 10); + if (idx2 <= 0 || idx2 > numparts) { + printf("Illegal partition number %s\n", name2); + ret = -EINVAL; + goto out; + } + if (idx1 == idx2) { + printf("Cannot swap partition with itself\n"); + ret = -EINVAL; + goto out; + } + + i = 1; + list_for_each(pos, &disk_partitions) { + curr = list_entry(pos, struct disk_part, list); + if (i == idx1) { + first = curr->gpt_part_info; + } else if (i == idx2) { + second = curr->gpt_part_info; + } + i++; + } + + i = 1; + list_for_each(pos, &disk_partitions) { + curr = list_entry(pos, struct disk_part, list); + if (i == idx1) { + curr->gpt_part_info = second; + } else if (i == idx2) { + curr->gpt_part_info = first; + } + i++; + } } else { /* rename */ if (strlen(name2) > PART_NAME_LEN) { printf("Names longer than %d characters are truncated.\n", PART_NAME_LEN); @@ -1122,7 +1164,8 @@ static int do_gpt(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[]) } else if (strcmp(argv[1], "read") == 0) { ret = do_get_gpt_info(blk_dev_desc, (argc == 5) ? argv[4] : NULL); } else if ((strcmp(argv[1], "swap") == 0) || - (strcmp(argv[1], "rename") == 0)) { + (strcmp(argv[1], "rename") == 0) || + (strcmp(argv[1], "swap-position") == 0)) { ret = do_rename_gpt_parts(blk_dev_desc, argv[1], argv[4], argv[5]); #endif } else if ((strcmp(argv[1], "set-bootable") == 0)) { @@ -1175,11 +1218,14 @@ U_BOOT_CMD(gpt, CONFIG_SYS_MAXARGS, 1, do_gpt, " gpt swap <interface> <dev> <name1> <name2>\n" " - change all partitions named name1 to name2\n" " and vice-versa\n" + " gpt swap-position <interface> <dev> <part1> <part2>\n" + " - Swap the order of name1 with name2 in the partition table\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" + " gpt swap-partitions mmc 0 1 2\n" #endif " gpt set-bootable <interface> <dev> <list>\n" " - make partition names in list bootable\n"