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gpt: add a new generic GUID type

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In order to do anything with partition GUIDs they need to be stored in a
proper structure like the partition type GUIDs. Additionally add an
initializer macro to simplify defining both GUID types.
This commit is contained in:
Michael Marineau 2014-10-30 20:55:21 -07:00
parent 7ed934533c
commit 6278c3e75f
2 changed files with 25 additions and 23 deletions
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36
include/grub/gpt_partition.h
View file

@ -23,33 +23,35 @@
#include <grub/partition.h>
#include <grub/msdos_partition.h>
struct grub_gpt_part_type
struct grub_gpt_guid
{
grub_uint32_t data1;
grub_uint16_t data2;
grub_uint16_t data3;
grub_uint8_t data4[8];
} __attribute__ ((aligned(8)));
typedef struct grub_gpt_part_type grub_gpt_part_type_t;
typedef struct grub_gpt_guid grub_gpt_guid_t;
typedef struct grub_gpt_guid grub_gpt_part_type_t;
#define GRUB_GPT_GUID_INIT(a, b, c, d1, d2, d3, d4, d5, d6, d7, d8) \
{ \
grub_cpu_to_le32_compile_time (a), \
grub_cpu_to_le16_compile_time (b), \
grub_cpu_to_le16_compile_time (c), \
{ d1, d2, d3, d4, d5, d6, d7, d8 } \
}
#define GRUB_GPT_PARTITION_TYPE_EMPTY \
{ 0x0, 0x0, 0x0, \
{ 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0 } \
}
GRUB_GPT_GUID_INIT (0x0, 0x0, 0x0, \
0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0)
#define GRUB_GPT_PARTITION_TYPE_BIOS_BOOT \
{ grub_cpu_to_le32_compile_time (0x21686148), \
grub_cpu_to_le16_compile_time (0x6449), \
grub_cpu_to_le16_compile_time (0x6e6f), \
{ 0x74, 0x4e, 0x65, 0x65, 0x64, 0x45, 0x46, 0x49 } \
}
GRUB_GPT_GUID_INIT (0x21686148, 0x6449, 0x6e6f, \
0x74, 0x4e, 0x65, 0x65, 0x64, 0x45, 0x46, 0x49)
#define GRUB_GPT_PARTITION_TYPE_LDM \
{ grub_cpu_to_le32_compile_time (0x5808C8AAU),\
grub_cpu_to_le16_compile_time (0x7E8F), \
grub_cpu_to_le16_compile_time (0x42E0), \
{ 0x85, 0xD2, 0xE1, 0xE9, 0x04, 0x34, 0xCF, 0xB3 } \
}
GRUB_GPT_GUID_INIT (0x5808c8aa, 0x7e8f, 0x42e0, \
0x85, 0xd2, 0xe1, 0xe9, 0x04, 0x34, 0xcf, 0xb3)
#define GRUB_GPT_HEADER_MAGIC \
{ 0x45, 0x46, 0x49, 0x20, 0x50, 0x41, 0x52, 0x54 }
@ -68,7 +70,7 @@ struct grub_gpt_header
grub_uint64_t alternate_lba;
grub_uint64_t start;
grub_uint64_t end;
grub_uint8_t guid[16];
grub_gpt_guid_t guid;
grub_uint64_t partitions;
grub_uint32_t maxpart;
grub_uint32_t partentry_size;
@ -78,7 +80,7 @@ struct grub_gpt_header
struct grub_gpt_partentry
{
grub_gpt_part_type_t type;
grub_uint8_t guid[16];
grub_gpt_guid_t guid;
grub_uint64_t start;
grub_uint64_t end;
grub_uint64_t attrib;

12
tests/gpt_unit_test.c
View file

@ -99,8 +99,8 @@ static const struct grub_gpt_header example_primary = {
.alternate_lba = grub_cpu_to_le64_compile_time (BACKUP_HEADER_SECTOR),
.start = grub_cpu_to_le64_compile_time (DATA_START_SECTOR),
.end = grub_cpu_to_le64_compile_time (DATA_END_SECTOR),
.guid = {0xad, 0x31, 0xc1, 0x69, 0xd6, 0x67, 0xc6, 0x46,
0x93, 0xc4, 0x12, 0x4c, 0x75, 0x52, 0x56, 0xac},
.guid = GRUB_GPT_GUID_INIT(0x69c131ad, 0x67d6, 0x46c6,
0x93, 0xc4, 0x12, 0x4c, 0x75, 0x52, 0x56, 0xac),
.partitions = grub_cpu_to_le64_compile_time (PRIMARY_TABLE_SECTOR),
.maxpart = grub_cpu_to_le32_compile_time (TABLE_ENTRIES),
.partentry_size = grub_cpu_to_le32_compile_time (ENTRY_SIZE),
@ -117,8 +117,8 @@ static const struct grub_gpt_header example_backup = {
.alternate_lba = grub_cpu_to_le64_compile_time (PRIMARY_HEADER_SECTOR),
.start = grub_cpu_to_le64_compile_time (DATA_START_SECTOR),
.end = grub_cpu_to_le64_compile_time (DATA_END_SECTOR),
.guid = {0xad, 0x31, 0xc1, 0x69, 0xd6, 0x67, 0xc6, 0x46,
0x93, 0xc4, 0x12, 0x4c, 0x75, 0x52, 0x56, 0xac},
.guid = GRUB_GPT_GUID_INIT(0x69c131ad, 0x67d6, 0x46c6,
0x93, 0xc4, 0x12, 0x4c, 0x75, 0x52, 0x56, 0xac),
.partitions = grub_cpu_to_le64_compile_time (BACKUP_TABLE_SECTOR),
.maxpart = grub_cpu_to_le32_compile_time (TABLE_ENTRIES),
.partentry_size = grub_cpu_to_le32_compile_time (ENTRY_SIZE),
@ -326,13 +326,13 @@ header_test (void)
grub_errno = GRUB_ERR_NONE;
/* Twiddle the GUID to invalidate the CRC. */
primary.guid[0] = 0;
primary.guid.data1 = 0;
grub_gpt_header_check (&primary, GRUB_DISK_SECTOR_BITS);
grub_test_assert (grub_errno == GRUB_ERR_BAD_PART_TABLE,
"unexpected error: %s", grub_errmsg);
grub_errno = GRUB_ERR_NONE;
backup.guid[0] = 0;
backup.guid.data1 = 0;
grub_gpt_header_check (&backup, GRUB_DISK_SECTOR_BITS);
grub_test_assert (grub_errno == GRUB_ERR_BAD_PART_TABLE,
"unexpected error: %s", grub_errmsg);