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-rw-r--r--block/genhd.c8
-rw-r--r--block/partitions/efi.c7
-rw-r--r--include/linux/genhd.h8
-rw-r--r--init/do_mounts.c28
4 files changed, 25 insertions, 26 deletions
diff --git a/block/genhd.c b/block/genhd.c
index 6cace66..b281f3a 100644
--- a/block/genhd.c
+++ b/block/genhd.c
@@ -743,7 +743,6 @@ void __init printk_all_partitions(void)
struct hd_struct *part;
char name_buf[BDEVNAME_SIZE];
char devt_buf[BDEVT_SIZE];
- char uuid_buf[PARTITION_META_INFO_UUIDLTH * 2 + 5];
/*
* Don't show empty devices or things that have been
@@ -762,16 +761,11 @@ void __init printk_all_partitions(void)
while ((part = disk_part_iter_next(&piter))) {
bool is_part0 = part == &disk->part0;
- uuid_buf[0] = '\0';
- if (part->info)
- snprintf(uuid_buf, sizeof(uuid_buf), "%pU",
- part->info->uuid);
-
printk("%s%s %10llu %s %s", is_part0 ? "" : " ",
bdevt_str(part_devt(part), devt_buf),
(unsigned long long)part_nr_sects_read(part) >> 1
, disk_name(disk, part->partno, name_buf),
- uuid_buf);
+ part->info ? part->info->uuid : "");
if (is_part0) {
if (disk->driverfs_dev != NULL &&
disk->driverfs_dev->driver != NULL)
diff --git a/block/partitions/efi.c b/block/partitions/efi.c
index 6296b40..b62fb88 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/include/linux/genhd.h b/include/linux/genhd.h
index 4f440b3..79b8bba 100644
--- a/include/linux/genhd.h
+++ b/include/linux/genhd.h
@@ -88,10 +88,14 @@ struct disk_stats {
};
#define PARTITION_META_INFO_VOLNAMELTH 64
-#define PARTITION_META_INFO_UUIDLTH 16
+/*
+ * Enough for the string representation of any kind of UUID plus NULL.
+ * EFI UUID is 36 characters. MSDOS UUID is 11 characters.
+ */
+#define PARTITION_META_INFO_UUIDLTH 37
struct partition_meta_info {
- u8 uuid[PARTITION_META_INFO_UUIDLTH]; /* always big endian */
+ char uuid[PARTITION_META_INFO_UUIDLTH];
u8 volname[PARTITION_META_INFO_VOLNAMELTH];
};
diff --git a/init/do_mounts.c b/init/do_mounts.c
index f8a6642..b28ec58 100644
--- a/init/do_mounts.c
+++ b/init/do_mounts.c
@@ -69,23 +69,28 @@ __setup("ro", readonly);
__setup("rw", readwrite);
#ifdef CONFIG_BLOCK
+struct uuidcmp {
+ const char *uuid;
+ int len;
+};
+
/**
* match_dev_by_uuid - callback for finding a partition using its uuid
* @dev: device passed in by the caller
- * @data: opaque pointer to a 36 byte char array with a UUID
+ * @data: opaque pointer to the desired struct uuidcmp to match
*
* Returns 1 if the device matches, and 0 otherwise.
*/
static int match_dev_by_uuid(struct device *dev, void *data)
{
- u8 *uuid = data;
+ struct uuidcmp *cmp = data;
struct hd_struct *part = dev_to_part(dev);
if (!part->info)
goto no_match;
- if (memcmp(uuid, part->info->uuid, sizeof(part->info->uuid)))
- goto no_match;
+ if (strncasecmp(cmp->uuid, part->info->uuid, cmp->len))
+ goto no_match;
return 1;
no_match:
@@ -95,7 +100,7 @@ no_match:
/**
* devt_from_partuuid - looks up the dev_t of a partition by its UUID
- * @uuid: min 36 byte char array containing a hex ascii UUID
+ * @uuid: char array containing ascii UUID
*
* The function will return the first partition which contains a matching
* UUID value in its partition_meta_info struct. This does not search
@@ -106,11 +111,11 @@ no_match:
*
* Returns the matching dev_t on success or 0 on failure.
*/
-static dev_t devt_from_partuuid(char *uuid_str)
+static dev_t devt_from_partuuid(const char *uuid_str)
{
dev_t res = 0;
+ struct uuidcmp cmp;
struct device *dev = NULL;
- u8 uuid[16];
struct gendisk *disk;
struct hd_struct *part;
int offset = 0;
@@ -118,6 +123,9 @@ static dev_t devt_from_partuuid(char *uuid_str)
if (strlen(uuid_str) < 36)
goto done;
+ cmp.uuid = uuid_str;
+ cmp.len = 36;
+
/* Check for optional partition number offset attributes. */
if (uuid_str[36]) {
char c = 0;
@@ -134,10 +142,8 @@ static dev_t devt_from_partuuid(char *uuid_str)
}
}
- /* Pack the requested UUID in the expected format. */
- part_pack_uuid(uuid_str, uuid);
-
- dev = class_find_device(&block_class, NULL, uuid, &match_dev_by_uuid);
+ dev = class_find_device(&block_class, NULL, &cmp,
+ &match_dev_by_uuid);
if (!dev)
goto done;
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