[U-Boot] [PATCH v3 3/3] uuid: add selection by string for known partition type GUID
Patrick Delaunay
patrick.delaunay73 at gmail.com
Tue Oct 27 11:00:28 CET 2015
short strings can be used in type parameter of gpt command
to replace the guid string for the types known by u-boot
partitions = name=boot,size=0x6bc00,type=data; \
name=root,size=0x7538ba00,type=linux;
gpt write mmc 0 $partitions
and they are also used to display the type of partition
in "part list" command
Partition Map for MMC device 0 -- Partition Type: EFI
Part Start LBA End LBA Name
Attributes
Type GUID
Partition GUID
1 0x00000022 0x0000037f "boot"
attrs: 0x0000000000000000
type: ebd0a0a2-b9e5-4433-87c0-68b6b72699c7
type: data
guid: d117f98e-6f2c-d04b-a5b2-331a19f91cb2
2 0x00000380 0x003a9fdc "root"
attrs: 0x0000000000000000
type: 0fc63daf-8483-4772-8e79-3d69d8477de4
type: linux
guid: 25718777-d0ad-7443-9e60-02cb591c9737
Signed-off-by: Patrick Delaunay <patrick.delaunay73 at gmail.com>
---
Changes in v3:
- documentation update
Changes in v2:
- guid change to type in gpt parameter
- remove hardcoded array size and use ARRAY_SIZE
- use guid in parameter name
- array is renamed to list_guid
(it could be not limited to partition type)
disk/part_efi.c | 4 ++++
doc/README.gpt | 24 ++++++++++++++++++++++
include/uuid.h | 4 ++++
lib/uuid.c | 64 +++++++++++++++++++++++++++++++++++++++++++++++++++++++--
4 files changed, 94 insertions(+), 2 deletions(-)
diff --git a/disk/part_efi.c b/disk/part_efi.c
index c124143..ea9c615 100644
--- a/disk/part_efi.c
+++ b/disk/part_efi.c
@@ -223,6 +223,10 @@ void print_part_efi(block_dev_desc_t * dev_desc)
uuid_bin = (unsigned char *)gpt_pte[i].partition_type_guid.b;
uuid_bin_to_str(uuid_bin, uuid, UUID_STR_FORMAT_GUID);
printf("\ttype:\t%s\n", uuid);
+#ifdef CONFIG_PARTITION_TYPE_GUID
+ if (!uuid_guid_get_str(uuid_bin, uuid))
+ printf("\ttype:\t%s\n", uuid);
+#endif
uuid_bin = (unsigned char *)gpt_pte[i].unique_partition_guid.b;
uuid_bin_to_str(uuid_bin, uuid, UUID_STR_FORMAT_GUID);
printf("\tguid:\t%s\n", uuid);
diff --git a/doc/README.gpt b/doc/README.gpt
index bf9b8bd..35902ce 100644
--- a/doc/README.gpt
+++ b/doc/README.gpt
@@ -184,6 +184,30 @@ can specify a other partition type guid:
name=kernel,size=60MiB,uuid=...,
type=0FC63DAF-8483-4772-8E79-3D69D8477DE4;"
+Some strings can be also used at the place of known GUID :
+ "system" = PARTITION_SYSTEM_GUID
+ (C12A7328-F81F-11D2-BA4B-00A0C93EC93B)
+ "mbr" = LEGACY_MBR_PARTITION_GUID
+ (024DEE41-33E7-11D3-9D69-0008C781F39F)
+ "msft" = PARTITION_MSFT_RESERVED_GUID
+ (E3C9E316-0B5C-4DB8-817D-F92DF00215AE)
+ "data" = PARTITION_BASIC_DATA_GUID
+ (EBD0A0A2-B9E5-4433-87C0-68B6B72699C7)
+ "linux" = PARTITION_LINUX_FILE_SYSTEM_DATA_GUID
+ (0FC63DAF-8483-4772-8E79-3D69D8477DE4)
+ "raid" = PARTITION_LINUX_RAID_GUID
+ (A19D880F-05FC-4D3B-A006-743F0F84911E)
+ "swap" = PARTITION_LINUX_SWAP_GUID
+ (0657FD6D-A4AB-43C4-84E5-0933C84B4F4F)
+ "lvm" = PARTITION_LINUX_LVM_GUID
+ (E6D6D379-F507-44C2-A23C-238F2A3DF928)
+
+ "partitions=uuid_disk=...;name=u-boot,size=60MiB,uuid=...;
+ name=kernel,size=60MiB,uuid=...,type=linux;"
+
+They are also used to display the type of partition in "part list" command.
+
+
Useful info:
============
diff --git a/include/uuid.h b/include/uuid.h
index 93027c1..c3f423f 100644
--- a/include/uuid.h
+++ b/include/uuid.h
@@ -36,6 +36,10 @@ enum {
int uuid_str_valid(const char *uuid);
int uuid_str_to_bin(char *uuid_str, unsigned char *uuid_bin, int str_format);
void uuid_bin_to_str(unsigned char *uuid_bin, char *uuid_str, int str_format);
+#ifdef CONFIG_PARTITION_TYPE_GUID
+int uuid_guid_get_bin(const char *guid_str, unsigned char *guid_bin);
+int uuid_guid_get_str(unsigned char *guid_bin, char *guid_str);
+#endif
void gen_rand_uuid(unsigned char *uuid_bin);
void gen_rand_uuid_str(char *uuid_str, int str_format);
#endif
diff --git a/lib/uuid.c b/lib/uuid.c
index f6b4423..c8584ed 100644
--- a/lib/uuid.c
+++ b/lib/uuid.c
@@ -80,10 +80,65 @@ int uuid_str_valid(const char *uuid)
return 1;
}
+#ifdef CONFIG_PARTITION_TYPE_GUID
+static const struct {
+ const char *string;
+ efi_guid_t guid;
+} list_guid[] = {
+ {"system", PARTITION_SYSTEM_GUID},
+ {"mbr", LEGACY_MBR_PARTITION_GUID},
+ {"msft", PARTITION_MSFT_RESERVED_GUID},
+ {"data", PARTITION_BASIC_DATA_GUID},
+ {"linux", PARTITION_LINUX_FILE_SYSTEM_DATA_GUID},
+ {"raid", PARTITION_LINUX_RAID_GUID},
+ {"swap", PARTITION_LINUX_SWAP_GUID},
+ {"lvm", PARTITION_LINUX_LVM_GUID}
+};
+
+/*
+ * uuid_guid_get_bin() - this function get GUID bin for string
+ *
+ * @param guid_str - pointer to partition type string
+ * @param guid_bin - pointer to allocated array for big endian output [16B]
+ */
+int uuid_guid_get_bin(const char *guid_str, unsigned char *guid_bin)
+{
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(list_guid); i++) {
+ if (!strcmp(list_guid[i].string, guid_str)) {
+ memcpy(guid_bin, &list_guid[i].guid, 16);
+ return 0;
+ }
+ }
+ return -ENODEV;
+}
+
+/*
+ * uuid_guid_get_str() - this function get string for GUID.
+ *
+ * @param guid_bin - pointer to string with partition type guid [16B]
+ * @param guid_str - pointer to allocated partition type string [7B]
+ */
+int uuid_guid_get_str(unsigned char *guid_bin, char *guid_str)
+{
+ int i;
+
+ *guid_str = 0;
+ for (i = 0; i < ARRAY_SIZE(list_guid); i++) {
+ if (!memcmp(list_guid[i].guid.b, guid_bin, 16)) {
+ strcpy(guid_str, list_guid[i].string);
+ return 0;
+ }
+ }
+ return -ENODEV;
+}
+#endif
+
/*
* uuid_str_to_bin() - convert string UUID or GUID to big endian binary data.
*
- * @param uuid_str - pointer to UUID or GUID string [37B]
+ * @param uuid_str - pointer to UUID or GUID string [37B] or GUID shorcut
* @param uuid_bin - pointer to allocated array for big endian output [16B]
* @str_format - UUID string format: 0 - UUID; 1 - GUID
*/
@@ -93,8 +148,13 @@ int uuid_str_to_bin(char *uuid_str, unsigned char *uuid_bin, int str_format)
uint32_t tmp32;
uint64_t tmp64;
- if (!uuid_str_valid(uuid_str))
+ if (!uuid_str_valid(uuid_str)) {
+#ifdef CONFIG_PARTITION_TYPE_GUID
+ if (!uuid_guid_get_bin(uuid_str, uuid_bin))
+ return 0;
+#endif
return -EINVAL;
+ }
if (str_format == UUID_STR_FORMAT_STD) {
tmp32 = cpu_to_be32(simple_strtoul(uuid_str, NULL, 16));
--
1.9.1
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