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uuid: add selection by string for known partition type GUID

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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@gmail.com>
This commit is contained in:
Patrick Delaunay 2015-10-27 11:00:28 +01:00 committed by Tom Rini
parent 7561b258a1
commit bcb41dcaef
4 changed files with 94 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
disk/part_efi.c
View File

@ -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);

24
doc/README.gpt
View File

@ -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:
============

4
include/uuid.h
View File

@ -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

64
lib/uuid.c
View File

@ -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));