Hello. I needed to convert my MBR disk to GPT without losing data, so I
coded a tool to do so. It should be able to also convert from other
partition labels as long as logical sector is 512 bit
It worked perfectly for me but I tested it only once so bugs are
possible. Use at your own risk
To compile:
put endian.h from libparted to the same directory as gogpt.c
gcc -o gogpt gogpt.c -Wall -luuid -lparted
To convert to gpt you do:
sudo ./gogpt <disk>
Note: it will change the order of your partitions and clean most of
attributes
--
Regards
Vladimir 'phcoder' Serbinenko
#include <parted/parted.h>
#include <uuid/uuid.h>
#include "endian.h"
#include <stdio.h>
#define SECTOR_SIZE 512
typedef uint16_t efi_char16_t; /* UNICODE character */
typedef struct _GuidPartitionTableHeader_t GuidPartitionTableHeader_t;
typedef struct _GuidPartitionEntryAttributes_t GuidPartitionEntryAttributes_t;
typedef struct _GuidPartitionEntry_t GuidPartitionEntry_t;
typedef struct _PartitionRecord_t PartitionRecord_t;
typedef struct _LegacyMBR_t LegacyMBR_t;
typedef struct _GPTDiskData GPTDiskData;
typedef struct {
uint32_t time_low;
uint16_t time_mid;
uint16_t time_hi_and_version;
uint8_t clock_seq_hi_and_reserved;
uint8_t clock_seq_low;
uint8_t node[6];
} /* __attribute__ ((packed)) */ efi_guid_t;
/* commented out "__attribute__ ((packed))" to work around gcc bug (fixed
* in gcc3.1): __attribute__ ((packed)) breaks addressing on initialized
* data. It turns out we don't need it in this case, so it doesn't break
* anything :)
*/
#define EFI_PMBR_OSTYPE_EFI 0xEE
#define MSDOS_MBR_SIGNATURE 0xaa55
#define GPT_HEADER_SIGNATURE 0x5452415020494645LL
/* NOTE: the document that describes revision 1.00 is labelled "version 1.02",
* so some implementors got confused...
*/
#define GPT_HEADER_REVISION_V1_02 0x00010200
#define GPT_HEADER_REVISION_V1_00 0x00010000
#define GPT_HEADER_REVISION_V0_99 0x00009900
#define UNUSED_ENTRY_GUID \
((efi_guid_t) { 0x00000000, 0x0000, 0x0000, 0x00, 0x00, \
{ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }})
#define PARTITION_SYSTEM_GUID \
((efi_guid_t) { PED_CPU_TO_LE32 (0xC12A7328), PED_CPU_TO_LE16 (0xF81F), \
PED_CPU_TO_LE16 (0x11d2), 0xBA, 0x4B, \
{ 0x00, 0xA0, 0xC9, 0x3E, 0xC9, 0x3B }})
#define PARTITION_BIOS_GRUB_GUID \
((efi_guid_t) { PED_CPU_TO_LE32 (0x21686148), PED_CPU_TO_LE16 (0x6449), \
PED_CPU_TO_LE16 (0x6E6f), 0x74, 0x4E, \
{ 0x65, 0x65, 0x64, 0x45, 0x46, 0x49 }})
#define LEGACY_MBR_PARTITION_GUID \
((efi_guid_t) { PED_CPU_TO_LE32 (0x024DEE41), PED_CPU_TO_LE16 (0x33E7), \
PED_CPU_TO_LE16 (0x11d3, 0x9D, 0x69, \
{ 0x00, 0x08, 0xC7, 0x81, 0xF3, 0x9F }})
#define PARTITION_MSFT_RESERVED_GUID \
((efi_guid_t) { PED_CPU_TO_LE32 (0xE3C9E316), PED_CPU_TO_LE16 (0x0B5C), \
PED_CPU_TO_LE16 (0x4DB8), 0x81, 0x7D, \
{ 0xF9, 0x2D, 0xF0, 0x02, 0x15, 0xAE }})
#define PARTITION_BASIC_DATA_GUID \
((efi_guid_t) { PED_CPU_TO_LE32 (0xEBD0A0A2), PED_CPU_TO_LE16 (0xB9E5), \
PED_CPU_TO_LE16 (0x4433), 0x87, 0xC0, \
{ 0x68, 0xB6, 0xB7, 0x26, 0x99, 0xC7 }})
#define PARTITION_RAID_GUID \
((efi_guid_t) { PED_CPU_TO_LE32 (0xa19d880f), PED_CPU_TO_LE16 (0x05fc), \
PED_CPU_TO_LE16 (0x4d3b), 0xa0, 0x06, \
{ 0x74, 0x3f, 0x0f, 0x84, 0x91, 0x1e }})
#define PARTITION_SWAP_GUID \
((efi_guid_t) { PED_CPU_TO_LE32 (0x0657fd6d), PED_CPU_TO_LE16 (0xa4ab), \
PED_CPU_TO_LE16 (0x43c4), 0x84, 0xe5, \
{ 0x09, 0x33, 0xc8, 0x4b, 0x4f, 0x4f }})
#define PARTITION_LVM_GUID \
((efi_guid_t) { PED_CPU_TO_LE32 (0xe6d6d379), PED_CPU_TO_LE16 (0xf507), \
PED_CPU_TO_LE16 (0x44c2), 0xa2, 0x3c, \
{ 0x23, 0x8f, 0x2a, 0x3d, 0xf9, 0x28 }})
#define PARTITION_RESERVED_GUID \
((efi_guid_t) { PED_CPU_TO_LE32 (0x8da63339), PED_CPU_TO_LE16 (0x0007), \
PED_CPU_TO_LE16 (0x60c0), 0xc4, 0x36, \
{ 0x08, 0x3a, 0xc8, 0x23, 0x09, 0x08 }})
#define PARTITION_HPSERVICE_GUID \
((efi_guid_t) { PED_CPU_TO_LE32 (0xe2a1e728), PED_CPU_TO_LE16 (0x32e3), \
PED_CPU_TO_LE16 (0x11d6), 0xa6, 0x82, \
{ 0x7b, 0x03, 0xa0, 0x00, 0x00, 0x00 }})
#define PARTITION_APPLE_HFS_GUID \
((efi_guid_t) { PED_CPU_TO_LE32 (0x48465300), PED_CPU_TO_LE16 (0x0000), \
PED_CPU_TO_LE16 (0x11AA), 0xaa, 0x11, \
{ 0x00, 0x30, 0x65, 0x43, 0xEC, 0xAC }})
struct __attribute__ ((packed)) _GuidPartitionTableHeader_t {
uint64_t Signature;
uint32_t Revision;
uint32_t HeaderSize;
uint32_t HeaderCRC32;
uint32_t Reserved1;
uint64_t MyLBA;
uint64_t AlternateLBA;
uint64_t FirstUsableLBA;
uint64_t LastUsableLBA;
efi_guid_t DiskGUID;
uint64_t PartitionEntryLBA;
uint32_t NumberOfPartitionEntries;
uint32_t SizeOfPartitionEntry;
uint32_t PartitionEntryArrayCRC32;
};
struct __attribute__ ((packed)) _GuidPartitionEntryAttributes_t {
#ifdef __GNUC__ /* XXX narrow this down to !TinyCC */
uint64_t RequiredToFunction:1;
uint64_t Reserved:47;
uint64_t GuidSpecific:16;
#else
# warning "Using crippled partition entry type"
uint32_t RequiredToFunction:1;
uint32_t Reserved:32;
uint32_t LOST:5;
uint32_t GuidSpecific:16;
#endif
};
struct __attribute__ ((packed)) _GuidPartitionEntry_t {
efi_guid_t PartitionTypeGuid;
efi_guid_t UniquePartitionGuid;
uint64_t StartingLBA;
uint64_t EndingLBA;
GuidPartitionEntryAttributes_t Attributes;
efi_char16_t PartitionName[72 / sizeof(efi_char16_t)];
};
#define GPT_PMBR_LBA 0
#define GPT_PMBR_SECTORS 1
#define GPT_PRIMARY_HEADER_LBA 1
#define GPT_HEADER_SECTORS 1
#define GPT_PRIMARY_PART_TABLE_LBA 2
/*
These values are only defaults. The actual on-disk structures
may define different sizes, so use those unless creating a new GPT disk!
*/
#define GPT_DEFAULT_PARTITION_ENTRY_ARRAY_SIZE 16384
/* Number of actual partition entries should be calculated as: */
#define GPT_DEFAULT_PARTITION_ENTRIES \
(GPT_DEFAULT_PARTITION_ENTRY_ARRAY_SIZE / \
sizeof(GuidPartitionEntry_t))
struct __attribute__ ((packed)) _PartitionRecord_t {
/* Not used by EFI firmware. Set to 0x80 to indicate that this
is the bootable legacy partition. */
uint8_t BootIndicator;
/* Start of partition in CHS address, not used by EFI firmware. */
uint8_t StartHead;
/* Start of partition in CHS address, not used by EFI firmware. */
uint8_t StartSector;
/* Start of partition in CHS address, not used by EFI firmware. */
uint8_t StartTrack;
/* OS type. A value of 0xEF defines an EFI system partition.
Other values are reserved for legacy operating systems, and
allocated independently of the EFI specification. */
uint8_t OSType;
/* End of partition in CHS address, not used by EFI firmware. */
uint8_t EndHead;
/* End of partition in CHS address, not used by EFI firmware. */
uint8_t EndSector;
/* End of partition in CHS address, not used by EFI firmware. */
uint8_t EndTrack;
/* Starting LBA address of the partition on the disk. Used by
EFI firmware to define the start of the partition. */
uint32_t StartingLBA;
/* Size of partition in LBA. Used by EFI firmware to determine
the size of the partition. */
uint32_t SizeInLBA;
};
/* Protected Master Boot Record & Legacy MBR share same structure */
/* Needs to be packed because the u16s force misalignment. */
struct __attribute__ ((packed)) _LegacyMBR_t {
uint8_t BootCode[440];
uint32_t UniqueMBRSignature;
uint16_t Unknown;
PartitionRecord_t PartitionRecord[4];
uint16_t Signature;
};
struct _GuidPartitionEntry_t parray[GPT_DEFAULT_PARTITION_ENTRY_ARRAY_SIZE
/ sizeof (struct _GuidPartitionEntry_t)];
/*
* Dec 5, 2000 Matt Domsch <[email protected]>
* - Copied crc32.c from the linux/drivers/net/cipe directory.
* - Now pass seed as an arg
* - changed unsigned long to uint32_t, added #include<stdint.h>
* - changed len to be an unsigned long
* - changed crc32val to be a register
* - License remains unchanged! It's still GPL-compatable!
*/
/* ============================================================= */
/* COPYRIGHT (C) 1986 Gary S. Brown. You may use this program, or */
/* code or tables extracted from it, as desired without restriction. */
/* */
/* First, the polynomial itself and its table of feedback terms. The */
/* polynomial is */
/* X^32+X^26+X^23+X^22+X^16+X^12+X^11+X^10+X^8+X^7+X^5+X^4+X^2+X^1+X^0 */
/* */
/* Note that we take it "backwards" and put the highest-order term in */
/* the lowest-order bit. The X^32 term is "implied"; the LSB is the */
/* X^31 term, etc. The X^0 term (usually shown as "+1") results in */
/* the MSB being 1. */
/* */
/* Note that the usual hardware shift register implementation, which */
/* is what we're using (we're merely optimizing it by doing eight-bit */
/* chunks at a time) shifts bits into the lowest-order term. In our */
/* implementation, that means shifting towards the right. Why do we */
/* do it this way? Because the calculated CRC must be transmitted in */
/* order from highest-order term to lowest-order term. UARTs transmit */
/* characters in order from LSB to MSB. By storing the CRC this way, */
/* we hand it to the UART in the order low-byte to high-byte; the UART */
/* sends each low-bit to hight-bit; and the result is transmission bit */
/* by bit from highest- to lowest-order term without requiring any bit */
/* shuffling on our part. Reception works similarly. */
/* */
/* The feedback terms table consists of 256, 32-bit entries. Notes: */
/* */
/* The table can be generated at runtime if desired; code to do so */
/* is shown later. It might not be obvious, but the feedback */
/* terms simply represent the results of eight shift/xor opera- */
/* tions for all combinations of data and CRC register values. */
/* */
/* The values must be right-shifted by eight bits by the "updcrc" */
/* logic; the shift must be unsigned (bring in zeroes). On some */
/* hardware you could probably optimize the shift in assembler by */
/* using byte-swap instructions. */
/* polynomial $edb88320 */
/* */
/* -------------------------------------------------------------------- */
#include <stdint.h>
static const uint32_t crc32_tab[] = {
0x00000000L, 0x77073096L, 0xee0e612cL, 0x990951baL, 0x076dc419L,
0x706af48fL, 0xe963a535L, 0x9e6495a3L, 0x0edb8832L, 0x79dcb8a4L,
0xe0d5e91eL, 0x97d2d988L, 0x09b64c2bL, 0x7eb17cbdL, 0xe7b82d07L,
0x90bf1d91L, 0x1db71064L, 0x6ab020f2L, 0xf3b97148L, 0x84be41deL,
0x1adad47dL, 0x6ddde4ebL, 0xf4d4b551L, 0x83d385c7L, 0x136c9856L,
0x646ba8c0L, 0xfd62f97aL, 0x8a65c9ecL, 0x14015c4fL, 0x63066cd9L,
0xfa0f3d63L, 0x8d080df5L, 0x3b6e20c8L, 0x4c69105eL, 0xd56041e4L,
0xa2677172L, 0x3c03e4d1L, 0x4b04d447L, 0xd20d85fdL, 0xa50ab56bL,
0x35b5a8faL, 0x42b2986cL, 0xdbbbc9d6L, 0xacbcf940L, 0x32d86ce3L,
0x45df5c75L, 0xdcd60dcfL, 0xabd13d59L, 0x26d930acL, 0x51de003aL,
0xc8d75180L, 0xbfd06116L, 0x21b4f4b5L, 0x56b3c423L, 0xcfba9599L,
0xb8bda50fL, 0x2802b89eL, 0x5f058808L, 0xc60cd9b2L, 0xb10be924L,
0x2f6f7c87L, 0x58684c11L, 0xc1611dabL, 0xb6662d3dL, 0x76dc4190L,
0x01db7106L, 0x98d220bcL, 0xefd5102aL, 0x71b18589L, 0x06b6b51fL,
0x9fbfe4a5L, 0xe8b8d433L, 0x7807c9a2L, 0x0f00f934L, 0x9609a88eL,
0xe10e9818L, 0x7f6a0dbbL, 0x086d3d2dL, 0x91646c97L, 0xe6635c01L,
0x6b6b51f4L, 0x1c6c6162L, 0x856530d8L, 0xf262004eL, 0x6c0695edL,
0x1b01a57bL, 0x8208f4c1L, 0xf50fc457L, 0x65b0d9c6L, 0x12b7e950L,
0x8bbeb8eaL, 0xfcb9887cL, 0x62dd1ddfL, 0x15da2d49L, 0x8cd37cf3L,
0xfbd44c65L, 0x4db26158L, 0x3ab551ceL, 0xa3bc0074L, 0xd4bb30e2L,
0x4adfa541L, 0x3dd895d7L, 0xa4d1c46dL, 0xd3d6f4fbL, 0x4369e96aL,
0x346ed9fcL, 0xad678846L, 0xda60b8d0L, 0x44042d73L, 0x33031de5L,
0xaa0a4c5fL, 0xdd0d7cc9L, 0x5005713cL, 0x270241aaL, 0xbe0b1010L,
0xc90c2086L, 0x5768b525L, 0x206f85b3L, 0xb966d409L, 0xce61e49fL,
0x5edef90eL, 0x29d9c998L, 0xb0d09822L, 0xc7d7a8b4L, 0x59b33d17L,
0x2eb40d81L, 0xb7bd5c3bL, 0xc0ba6cadL, 0xedb88320L, 0x9abfb3b6L,
0x03b6e20cL, 0x74b1d29aL, 0xead54739L, 0x9dd277afL, 0x04db2615L,
0x73dc1683L, 0xe3630b12L, 0x94643b84L, 0x0d6d6a3eL, 0x7a6a5aa8L,
0xe40ecf0bL, 0x9309ff9dL, 0x0a00ae27L, 0x7d079eb1L, 0xf00f9344L,
0x8708a3d2L, 0x1e01f268L, 0x6906c2feL, 0xf762575dL, 0x806567cbL,
0x196c3671L, 0x6e6b06e7L, 0xfed41b76L, 0x89d32be0L, 0x10da7a5aL,
0x67dd4accL, 0xf9b9df6fL, 0x8ebeeff9L, 0x17b7be43L, 0x60b08ed5L,
0xd6d6a3e8L, 0xa1d1937eL, 0x38d8c2c4L, 0x4fdff252L, 0xd1bb67f1L,
0xa6bc5767L, 0x3fb506ddL, 0x48b2364bL, 0xd80d2bdaL, 0xaf0a1b4cL,
0x36034af6L, 0x41047a60L, 0xdf60efc3L, 0xa867df55L, 0x316e8eefL,
0x4669be79L, 0xcb61b38cL, 0xbc66831aL, 0x256fd2a0L, 0x5268e236L,
0xcc0c7795L, 0xbb0b4703L, 0x220216b9L, 0x5505262fL, 0xc5ba3bbeL,
0xb2bd0b28L, 0x2bb45a92L, 0x5cb36a04L, 0xc2d7ffa7L, 0xb5d0cf31L,
0x2cd99e8bL, 0x5bdeae1dL, 0x9b64c2b0L, 0xec63f226L, 0x756aa39cL,
0x026d930aL, 0x9c0906a9L, 0xeb0e363fL, 0x72076785L, 0x05005713L,
0x95bf4a82L, 0xe2b87a14L, 0x7bb12baeL, 0x0cb61b38L, 0x92d28e9bL,
0xe5d5be0dL, 0x7cdcefb7L, 0x0bdbdf21L, 0x86d3d2d4L, 0xf1d4e242L,
0x68ddb3f8L, 0x1fda836eL, 0x81be16cdL, 0xf6b9265bL, 0x6fb077e1L,
0x18b74777L, 0x88085ae6L, 0xff0f6a70L, 0x66063bcaL, 0x11010b5cL,
0x8f659effL, 0xf862ae69L, 0x616bffd3L, 0x166ccf45L, 0xa00ae278L,
0xd70dd2eeL, 0x4e048354L, 0x3903b3c2L, 0xa7672661L, 0xd06016f7L,
0x4969474dL, 0x3e6e77dbL, 0xaed16a4aL, 0xd9d65adcL, 0x40df0b66L,
0x37d83bf0L, 0xa9bcae53L, 0xdebb9ec5L, 0x47b2cf7fL, 0x30b5ffe9L,
0xbdbdf21cL, 0xcabac28aL, 0x53b39330L, 0x24b4a3a6L, 0xbad03605L,
0xcdd70693L, 0x54de5729L, 0x23d967bfL, 0xb3667a2eL, 0xc4614ab8L,
0x5d681b02L, 0x2a6f2b94L, 0xb40bbe37L, 0xc30c8ea1L, 0x5a05df1bL,
0x2d02ef8dL
};
/* Return a 32-bit CRC of the contents of the buffer. */
uint32_t
__efi_crc32(const void *buf, unsigned long len, uint32_t seed)
{
unsigned long i;
register uint32_t crc32val;
const unsigned char *s = buf;
crc32val = seed;
for (i = 0; i < len; i ++)
{
crc32val =
crc32_tab[(crc32val ^ s[i]) & 0xff] ^
(crc32val >> 8);
}
return crc32val;
}
/* returns the EFI-style CRC32 value for buf
* This function uses the crc32 function by Gary S. Brown,
* but seeds the function with ~0, and xor's with ~0 at the end.
*/
static inline uint32_t
efi_crc32(const void *buf, unsigned long len)
{
return (__efi_crc32(buf, len, ~0L) ^ ~0L);
}
int
main (int argc, char **argv)
{
PedDevice *device;
PedDisk *disk;
PedPartition *curpart;
PedSector first_sector, last_sector;
PedFileSystemType *fstype;
int partno = 0, i;
char namebuf[100];
efi_guid_t hfsp_guid = PARTITION_APPLE_HFS_GUID;
efi_guid_t data_guid = PARTITION_BASIC_DATA_GUID;
efi_guid_t swap_guid = PARTITION_SWAP_GUID;
if (argc != 2)
{
printf ("Usage: %s DISK\nConvert disk to GPT\n", argv[0]);
return 0;
}
device = ped_device_get (argv[1]);
if (! device)
{
fprintf (stderr, "Couldn't find %s\n", argv[1]);
return 1;
}
disk = ped_disk_new (device);
if (! disk)
{
fprintf (stderr, "Couldn't read partitions from %s\n", argv[1]);
return 2;
}
first_sector = device->length;
last_sector = 0ULL;
curpart = 0;
memset (parray, 0, sizeof (parray));
while ((curpart = ped_disk_next_partition (disk, curpart)))
{
if (! ped_partition_is_active (curpart)
|| curpart->type == PED_PARTITION_EXTENDED)
continue;
if (partno == sizeof (parray) / sizeof (parray[0]))
{
fprintf (stderr, "Too many partitions. Not implemented yet.\n");
return 3;
}
printf ("Partition %d: %lld - %lld", partno, curpart->geom.start,
curpart->geom.end);
fstype = ped_file_system_probe (&(curpart->geom));
if (fstype)
printf (" (%s)", fstype->name);
printf ("\n");
if (fstype && strncmp (fstype->name, "hfs", 3) == 0)
memcpy (&(parray[partno].PartitionTypeGuid), &hfsp_guid,
sizeof (parray[partno].PartitionTypeGuid));
else if (fstype && (strstr (fstype->name, "swap")))
memcpy (&(parray[partno].PartitionTypeGuid), &swap_guid,
sizeof (parray[partno].PartitionTypeGuid));
else
memcpy (&(parray[partno].PartitionTypeGuid), &data_guid,
sizeof (parray[partno].PartitionTypeGuid));
parray[partno].StartingLBA = PED_CPU_TO_LE64 (curpart->geom.start);
parray[partno].EndingLBA = PED_CPU_TO_LE64 (curpart->geom.end);
memset (&(parray[partno].Attributes), 0,
sizeof (GuidPartitionEntryAttributes_t));
memset (namebuf, 0, sizeof (namebuf));
sprintf (namebuf, "GoGPT_Partition_%d", partno + 1);
for (i = 0; i < 72 / sizeof(efi_char16_t); i++)
parray[partno].PartitionName[i]
= (efi_char16_t) PED_CPU_TO_LE16((uint16_t) namebuf[i]);
uuid_generate_random ((unsigned char *) &(parray[partno].UniquePartitionGuid));
partno++;
if (first_sector > curpart->geom.start)
first_sector = curpart->geom.start;
if (last_sector < curpart->geom.end)
last_sector = curpart->geom.end;
}
printf ("Occupied: %lld - %lld\n", first_sector, last_sector);
if (first_sector < 2 + GPT_DEFAULT_PARTITION_ENTRY_ARRAY_SIZE / SECTOR_SIZE
|| last_sector > device->length - 2 - GPT_DEFAULT_PARTITION_ENTRY_ARRAY_SIZE / SECTOR_SIZE)
{
fprintf (stderr, "You need to have first and last 32 KiB free of partitions to use this tool.\n");
return 4;
}
ped_disk_destroy (disk);
GuidPartitionTableHeader_t gpt_header;
gpt_header.Signature = PED_CPU_TO_LE64 (GPT_HEADER_SIGNATURE);
gpt_header.Revision = PED_CPU_TO_LE32 (GPT_HEADER_REVISION_V1_00);
/* per 1.00 spec */
gpt_header.HeaderSize = PED_CPU_TO_LE32 (sizeof (gpt_header));
gpt_header.Reserved1 = 0;
gpt_header.FirstUsableLBA
= PED_CPU_TO_LE64 (2 + GPT_DEFAULT_PARTITION_ENTRY_ARRAY_SIZE / SECTOR_SIZE);
gpt_header.LastUsableLBA
= PED_CPU_TO_LE64 (device->length - 2 - GPT_DEFAULT_PARTITION_ENTRY_ARRAY_SIZE / SECTOR_SIZE);
gpt_header.NumberOfPartitionEntries
= PED_CPU_TO_LE32 (sizeof (parray) / sizeof (parray[0]));
gpt_header.SizeOfPartitionEntry
= PED_CPU_TO_LE32 (sizeof (GuidPartitionEntry_t));
uuid_generate_random ((unsigned char *) &(gpt_header.DiskGUID));
gpt_header.PartitionEntryArrayCRC32
= PED_CPU_TO_LE32 (efi_crc32 (&parray, sizeof (parray)));
gpt_header.HeaderCRC32 = 0;
gpt_header.MyLBA = PED_CPU_TO_LE64 (1);
gpt_header.AlternateLBA = PED_CPU_TO_LE64 (device->length - 1);
gpt_header.PartitionEntryLBA = PED_CPU_TO_LE64 (2);
gpt_header.HeaderCRC32 = 0;
gpt_header.HeaderCRC32
= PED_CPU_TO_LE32 (efi_crc32 (&gpt_header, sizeof (gpt_header)));
/* Main write. */
if (! ped_device_open (device))
{
fprintf (stderr, "Couldn't open %s for writing.\n", argv[1]);
return 5;
}
{
char buffer[SECTOR_SIZE];
memset (buffer, 0, sizeof(buffer));
memcpy (buffer, &gpt_header, sizeof (gpt_header));
if (! ped_device_write (device, buffer, 1, 1))
{
fprintf (stderr, "Couldn't write to %s .\n", argv[1]);
return 6;
}
}
if (! ped_device_write (device, parray, 2,
sizeof (parray) / SECTOR_SIZE))
{
fprintf (stderr, "Couldn't write to %s .\n", argv[1]);
return 6;
}
gpt_header.MyLBA = PED_CPU_TO_LE64 (device->length - 1);
gpt_header.AlternateLBA = PED_CPU_TO_LE64 (1);
gpt_header.PartitionEntryLBA
= PED_CPU_TO_LE64 (device->length - 1 - GPT_DEFAULT_PARTITION_ENTRY_ARRAY_SIZE / SECTOR_SIZE);
gpt_header.HeaderCRC32 = 0;
gpt_header.HeaderCRC32
= PED_CPU_TO_LE32 (efi_crc32 (&gpt_header, sizeof (gpt_header)));
/* Alternate write. */
{
char buffer[SECTOR_SIZE];
memset (buffer, 0, sizeof(buffer));
memcpy (buffer, &gpt_header, sizeof (gpt_header));
if (! ped_device_write (device, &gpt_header, device->length - 1, 1))
{
fprintf (stderr, "Couldn't write to %s .\n", argv[1]);
return 6;
}
}
if (! ped_device_write (device, parray, device->length - 1 - sizeof (parray) / SECTOR_SIZE, sizeof (parray) / SECTOR_SIZE))
{
fprintf (stderr, "Couldn't write to %s .\n", argv[1]);
return 6;
}
LegacyMBR_t pmbr;
memset(&pmbr, 0, sizeof(pmbr));
pmbr.Signature = PED_CPU_TO_LE16(MSDOS_MBR_SIGNATURE);
pmbr.PartitionRecord[0].OSType = EFI_PMBR_OSTYPE_EFI;
pmbr.PartitionRecord[0].StartSector = 1;
pmbr.PartitionRecord[0].EndHead = 0xFE;
pmbr.PartitionRecord[0].EndSector = 0xFF;
pmbr.PartitionRecord[0].EndTrack = 0xFF;
pmbr.PartitionRecord[0].StartingLBA = PED_CPU_TO_LE32(1);
if ((device->length - 1ULL) > 0xFFFFFFFFULL)
pmbr.PartitionRecord[0].SizeInLBA = PED_CPU_TO_LE32(0xFFFFFFFF);
else
pmbr.PartitionRecord[0].SizeInLBA = PED_CPU_TO_LE32(device->length - 1UL);
if (! ped_device_write (device, &pmbr, GPT_PMBR_LBA, GPT_PMBR_SECTORS))
{
fprintf (stderr, "Couldn't write to %s .\n", argv[1]);
return 6;
}
ped_device_sync (device);
ped_device_close (device);
printf ("Congratulations. %s is now GPT\n", argv[1]);
return 0;
}
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