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-rw-r--r--block/partitions/efi.c7
-rw-r--r--block/partitions/msdos.c21
2 files changed, 20 insertions, 8 deletions
diff --git a/block/partitions/efi.c b/block/partitions/efi.c
index 6296b403c67a..b62fb88b8711 100644
--- a/block/partitions/efi.c
+++ b/block/partitions/efi.c
@@ -620,7 +620,6 @@ int efi_partition(struct parsed_partitions *state)
gpt_entry *ptes = NULL;
u32 i;
unsigned ssz = bdev_logical_block_size(state->bdev) / 512;
- u8 unparsed_guid[37];
if (!find_valid_gpt(state, &gpt, &ptes) || !gpt || !ptes) {
kfree(gpt);
@@ -649,11 +648,7 @@ int efi_partition(struct parsed_partitions *state)
state->parts[i + 1].flags = ADDPART_FLAG_RAID;
info = &state->parts[i + 1].info;
- /* Instead of doing a manual swap to big endian, reuse the
- * common ASCII hex format as the interim.
- */
- efi_guid_unparse(&ptes[i].unique_partition_guid, unparsed_guid);
- part_pack_uuid(unparsed_guid, info->uuid);
+ efi_guid_unparse(&ptes[i].unique_partition_guid, info->uuid);
/* Naively convert UTF16-LE to 7 bits. */
label_max = min(sizeof(info->volname) - 1,
diff --git a/block/partitions/msdos.c b/block/partitions/msdos.c
index 5f79a6677c69..8752a5d26565 100644
--- a/block/partitions/msdos.c
+++ b/block/partitions/msdos.c
@@ -94,6 +94,17 @@ static int aix_magic_present(struct parsed_partitions *state, unsigned char *p)
return ret;
}
+static void set_info(struct parsed_partitions *state, int slot,
+ u32 disksig)
+{
+ struct partition_meta_info *info = &state->parts[slot].info;
+
+ snprintf(info->uuid, sizeof(info->uuid), "%08x-%02x", disksig,
+ slot);
+ info->volname[0] = 0;
+ state->parts[slot].has_info = true;
+}
+
/*
* Create devices for each logical partition in an extended partition.
* The logical partitions form a linked list, with each entry being
@@ -106,7 +117,8 @@ static int aix_magic_present(struct parsed_partitions *state, unsigned char *p)
*/
static void parse_extended(struct parsed_partitions *state,
- sector_t first_sector, sector_t first_size)
+ sector_t first_sector, sector_t first_size,
+ u32 disksig)
{
struct partition *p;
Sector sect;
@@ -166,6 +178,7 @@ static void parse_extended(struct parsed_partitions *state,
}
put_partition(state, state->next, next, size);
+ set_info(state, state->next, disksig);
if (SYS_IND(p) == LINUX_RAID_PARTITION)
state->parts[state->next].flags = ADDPART_FLAG_RAID;
loopct = 0;
@@ -437,6 +450,7 @@ int msdos_partition(struct parsed_partitions *state)
struct partition *p;
struct fat_boot_sector *fb;
int slot;
+ u32 disksig;
data = read_part_sector(state, 0, &sect);
if (!data)
@@ -491,6 +505,8 @@ int msdos_partition(struct parsed_partitions *state)
#endif
p = (struct partition *) (data + 0x1be);
+ disksig = le32_to_cpup((__le32 *)(data + 0x1b8));
+
/*
* Look for partitions in two passes:
* First find the primary and DOS-type extended partitions.
@@ -515,11 +531,12 @@ int msdos_partition(struct parsed_partitions *state)
put_partition(state, slot, start, n);
strlcat(state->pp_buf, " <", PAGE_SIZE);
- parse_extended(state, start, size);
+ parse_extended(state, start, size, disksig);
strlcat(state->pp_buf, " >", PAGE_SIZE);
continue;
}
put_partition(state, slot, start, size);
+ set_info(state, slot, disksig);
if (SYS_IND(p) == LINUX_RAID_PARTITION)
state->parts[slot].flags = ADDPART_FLAG_RAID;
if (SYS_IND(p) == DM6_PARTITION)