2 libparted - a library for manipulating disk partitions
4 original version by Matt Domsch <Matt_Domsch@dell.com>
5 Disclaimed into the Public Domain
7 Portions Copyright (C) 2001-2003, 2005-2009 Free Software Foundation, Inc.
9 EFI GUID Partition Table handling
10 Per Intel EFI Specification v1.02
11 http://developer.intel.com/technology/efi/efi.htm
13 This program is free software; you can redistribute it and/or modify
14 it under the terms of the GNU General Public License as published by
15 the Free Software Foundation; either version 3 of the License, or
16 (at your option) any later version.
18 This program is distributed in the hope that it will be useful,
19 but WITHOUT ANY WARRANTY; without even the implied warranty of
20 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
21 GNU General Public License for more details.
23 You should have received a copy of the GNU General Public License
24 along with this program. If not, see <http://www.gnu.org/licenses/>.
29 #include <parted/parted.h>
30 #include <parted/debug.h>
31 #include <parted/endian.h>
32 #include <parted/crc32.h>
35 #include <sys/types.h>
36 #include <sys/ioctl.h>
39 #include <uuid/uuid.h>
48 # define _(String) gettext (String)
50 # define _(String) (String)
51 #endif /* ENABLE_NLS */
53 #define EFI_PMBR_OSTYPE_EFI 0xEE
54 #define MSDOS_MBR_SIGNATURE 0xaa55
56 #define GPT_HEADER_SIGNATURE 0x5452415020494645LL
58 /* NOTE: the document that describes revision 1.00 is labelled "version 1.02",
59 * so some implementors got confused...
61 #define GPT_HEADER_REVISION_V1_02 0x00010200
62 #define GPT_HEADER_REVISION_V1_00 0x00010000
63 #define GPT_HEADER_REVISION_V0_99 0x00009900
65 typedef uint16_t efi_char16_t; /* UNICODE character */
66 typedef struct _GuidPartitionTableHeader_t GuidPartitionTableHeader_t;
67 typedef struct _GuidPartitionEntryAttributes_t GuidPartitionEntryAttributes_t;
68 typedef struct _GuidPartitionEntry_t GuidPartitionEntry_t;
69 typedef struct _PartitionRecord_t PartitionRecord_t;
70 typedef struct _LegacyMBR_t LegacyMBR_t;
71 typedef struct _GPTDiskData GPTDiskData;
76 uint16_t time_hi_and_version;
77 uint8_t clock_seq_hi_and_reserved;
78 uint8_t clock_seq_low;
80 } /* __attribute__ ((packed)) */ efi_guid_t;
81 /* commented out "__attribute__ ((packed))" to work around gcc bug (fixed
82 * in gcc3.1): __attribute__ ((packed)) breaks addressing on initialized
83 * data. It turns out we don't need it in this case, so it doesn't break
87 #define UNUSED_ENTRY_GUID \
88 ((efi_guid_t) { 0x00000000, 0x0000, 0x0000, 0x00, 0x00, \
89 { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }})
90 #define PARTITION_SYSTEM_GUID \
91 ((efi_guid_t) { PED_CPU_TO_LE32 (0xC12A7328), PED_CPU_TO_LE16 (0xF81F), \
92 PED_CPU_TO_LE16 (0x11d2), 0xBA, 0x4B, \
93 { 0x00, 0xA0, 0xC9, 0x3E, 0xC9, 0x3B }})
94 #define PARTITION_BIOS_GRUB_GUID \
95 ((efi_guid_t) { PED_CPU_TO_LE32 (0x21686148), PED_CPU_TO_LE16 (0x6449), \
96 PED_CPU_TO_LE16 (0x6E6f), 0x74, 0x4E, \
97 { 0x65, 0x65, 0x64, 0x45, 0x46, 0x49 }})
98 #define LEGACY_MBR_PARTITION_GUID \
99 ((efi_guid_t) { PED_CPU_TO_LE32 (0x024DEE41), PED_CPU_TO_LE16 (0x33E7), \
100 PED_CPU_TO_LE16 (0x11d3, 0x9D, 0x69, \
101 { 0x00, 0x08, 0xC7, 0x81, 0xF3, 0x9F }})
102 #define PARTITION_MSFT_RESERVED_GUID \
103 ((efi_guid_t) { PED_CPU_TO_LE32 (0xE3C9E316), PED_CPU_TO_LE16 (0x0B5C), \
104 PED_CPU_TO_LE16 (0x4DB8), 0x81, 0x7D, \
105 { 0xF9, 0x2D, 0xF0, 0x02, 0x15, 0xAE }})
106 #define PARTITION_BASIC_DATA_GUID \
107 ((efi_guid_t) { PED_CPU_TO_LE32 (0xEBD0A0A2), PED_CPU_TO_LE16 (0xB9E5), \
108 PED_CPU_TO_LE16 (0x4433), 0x87, 0xC0, \
109 { 0x68, 0xB6, 0xB7, 0x26, 0x99, 0xC7 }})
110 #define PARTITION_RAID_GUID \
111 ((efi_guid_t) { PED_CPU_TO_LE32 (0xa19d880f), PED_CPU_TO_LE16 (0x05fc), \
112 PED_CPU_TO_LE16 (0x4d3b), 0xa0, 0x06, \
113 { 0x74, 0x3f, 0x0f, 0x84, 0x91, 0x1e }})
114 #define PARTITION_SWAP_GUID \
115 ((efi_guid_t) { PED_CPU_TO_LE32 (0x0657fd6d), PED_CPU_TO_LE16 (0xa4ab), \
116 PED_CPU_TO_LE16 (0x43c4), 0x84, 0xe5, \
117 { 0x09, 0x33, 0xc8, 0x4b, 0x4f, 0x4f }})
118 #define PARTITION_LVM_GUID \
119 ((efi_guid_t) { PED_CPU_TO_LE32 (0xe6d6d379), PED_CPU_TO_LE16 (0xf507), \
120 PED_CPU_TO_LE16 (0x44c2), 0xa2, 0x3c, \
121 { 0x23, 0x8f, 0x2a, 0x3d, 0xf9, 0x28 }})
122 #define PARTITION_RESERVED_GUID \
123 ((efi_guid_t) { PED_CPU_TO_LE32 (0x8da63339), PED_CPU_TO_LE16 (0x0007), \
124 PED_CPU_TO_LE16 (0x60c0), 0xc4, 0x36, \
125 { 0x08, 0x3a, 0xc8, 0x23, 0x09, 0x08 }})
126 #define PARTITION_HPSERVICE_GUID \
127 ((efi_guid_t) { PED_CPU_TO_LE32 (0xe2a1e728), PED_CPU_TO_LE16 (0x32e3), \
128 PED_CPU_TO_LE16 (0x11d6), 0xa6, 0x82, \
129 { 0x7b, 0x03, 0xa0, 0x00, 0x00, 0x00 }})
130 #define PARTITION_APPLE_HFS_GUID \
131 ((efi_guid_t) { PED_CPU_TO_LE32 (0x48465300), PED_CPU_TO_LE16 (0x0000), \
132 PED_CPU_TO_LE16 (0x11AA), 0xaa, 0x11, \
133 { 0x00, 0x30, 0x65, 0x43, 0xEC, 0xAC }})
135 struct __attribute__ ((packed)) _GuidPartitionTableHeader_t
140 uint32_t HeaderCRC32;
143 uint64_t AlternateLBA;
144 uint64_t FirstUsableLBA;
145 uint64_t LastUsableLBA;
147 uint64_t PartitionEntryLBA;
148 uint32_t NumberOfPartitionEntries;
149 uint32_t SizeOfPartitionEntry;
150 uint32_t PartitionEntryArrayCRC32;
154 struct __attribute__ ((packed)) _GuidPartitionEntryAttributes_t
156 #ifdef __GNUC__ /* XXX narrow this down to !TinyCC */
157 uint64_t RequiredToFunction:1;
158 uint64_t Reserved:47;
159 uint64_t GuidSpecific:16;
161 # warning "Using crippled partition entry type"
162 uint32_t RequiredToFunction:1;
163 uint32_t Reserved:32;
165 uint32_t GuidSpecific:16;
169 struct __attribute__ ((packed)) _GuidPartitionEntry_t
171 efi_guid_t PartitionTypeGuid;
172 efi_guid_t UniquePartitionGuid;
173 uint64_t StartingLBA;
175 GuidPartitionEntryAttributes_t Attributes;
176 efi_char16_t PartitionName[72 / sizeof (efi_char16_t)];
179 #define GPT_PMBR_LBA 0
180 #define GPT_PMBR_SECTORS 1
181 #define GPT_PRIMARY_HEADER_LBA 1
182 #define GPT_HEADER_SECTORS 1
183 #define GPT_PRIMARY_PART_TABLE_LBA 2
186 These values are only defaults. The actual on-disk structures
187 may define different sizes, so use those unless creating a new GPT disk!
190 #define GPT_DEFAULT_PARTITION_ENTRY_ARRAY_SIZE 16384
192 /* Number of actual partition entries should be calculated as: */
193 #define GPT_DEFAULT_PARTITION_ENTRIES \
194 (GPT_DEFAULT_PARTITION_ENTRY_ARRAY_SIZE / \
195 sizeof(GuidPartitionEntry_t))
197 struct __attribute__ ((packed)) _PartitionRecord_t
199 /* Not used by EFI firmware. Set to 0x80 to indicate that this
200 is the bootable legacy partition. */
201 uint8_t BootIndicator;
203 /* Start of partition in CHS address, not used by EFI firmware. */
206 /* Start of partition in CHS address, not used by EFI firmware. */
209 /* Start of partition in CHS address, not used by EFI firmware. */
212 /* OS type. A value of 0xEF defines an EFI system partition.
213 Other values are reserved for legacy operating systems, and
214 allocated independently of the EFI specification. */
217 /* End of partition in CHS address, not used by EFI firmware. */
220 /* End of partition in CHS address, not used by EFI firmware. */
223 /* End of partition in CHS address, not used by EFI firmware. */
226 /* Starting LBA address of the partition on the disk. Used by
227 EFI firmware to define the start of the partition. */
228 uint32_t StartingLBA;
230 /* Size of partition in LBA. Used by EFI firmware to determine
231 the size of the partition. */
235 /* Protected Master Boot Record & Legacy MBR share same structure */
236 /* Needs to be packed because the u16s force misalignment. */
237 struct __attribute__ ((packed)) _LegacyMBR_t
239 uint8_t BootCode[440];
240 uint32_t UniqueMBRSignature;
242 PartitionRecord_t PartitionRecord[4];
246 /* uses libparted's disk_specific field in PedDisk, to store our info */
247 struct __attribute__ ((packed)) _GPTDiskData
249 PedGeometry data_area;
254 /* uses libparted's disk_specific field in PedPartition, to store our info */
255 typedef struct _GPTPartitionData
269 static PedDiskType gpt_disk_type;
271 static inline uint32_t
272 pth_get_size (const PedDevice *dev)
274 return GPT_HEADER_SECTORS * dev->sector_size;
277 static inline uint32_t
278 pth_get_size_static (const PedDevice *dev)
280 return sizeof (GuidPartitionTableHeader_t) - sizeof (uint8_t *);
283 static inline uint32_t
284 pth_get_size_rsv2 (const PedDevice *dev)
286 return pth_get_size (dev) - pth_get_size_static (dev);
289 static GuidPartitionTableHeader_t *
290 pth_new (const PedDevice *dev)
292 GuidPartitionTableHeader_t *pth =
293 ped_malloc (sizeof (GuidPartitionTableHeader_t) + sizeof (uint8_t));
295 pth->Reserved2 = ped_malloc (pth_get_size_rsv2 (dev));
300 static GuidPartitionTableHeader_t *
301 pth_new_zeroed (const PedDevice *dev)
303 GuidPartitionTableHeader_t *pth = pth_new (dev);
305 memset (pth, 0, pth_get_size_static (dev));
306 memset (pth->Reserved2, 0, pth_get_size_rsv2 (dev));
311 static GuidPartitionTableHeader_t *
312 pth_new_from_raw (const PedDevice *dev, const uint8_t *pth_raw)
314 GuidPartitionTableHeader_t *pth = pth_new (dev);
316 PED_ASSERT (pth_raw != NULL, return 0);
318 memcpy (pth, pth_raw, pth_get_size_static (dev));
319 memcpy (pth->Reserved2, pth_raw + pth_get_size_static (dev),
320 pth_get_size_rsv2 (dev));
326 pth_free (GuidPartitionTableHeader_t *pth)
330 PED_ASSERT (pth->Reserved2 != NULL, return);
332 free (pth->Reserved2);
337 pth_get_raw (const PedDevice *dev, const GuidPartitionTableHeader_t *pth)
339 PED_ASSERT (pth != NULL, return 0);
340 PED_ASSERT (pth->Reserved2 != NULL, return 0);
342 int size_static = pth_get_size_static (dev);
343 uint8_t *pth_raw = ped_malloc (pth_get_size (dev));
347 memcpy (pth_raw, pth, size_static);
348 memcpy (pth_raw + size_static, pth->Reserved2, pth_get_size_rsv2 (dev));
354 * swap_uuid_and_efi_guid() - converts between uuid formats
355 * @uuid - uuid_t in either format (converts it to the other)
357 * There are two different representations for Globally Unique Identifiers
360 * The RFC specifies a UUID as a string of 16 bytes, essentially
361 * a big-endian array of char.
362 * Intel, in their EFI Specification, references the same RFC, but
363 * then defines a GUID as a structure of little-endian fields.
364 * Coincidentally, both structures have the same format when unparsed.
366 * When read from disk, EFI GUIDs are in struct of little endian format,
367 * and need to be converted to be treated as uuid_t in memory.
369 * When writing to disk, uuid_ts need to be converted into EFI GUIDs.
374 swap_uuid_and_efi_guid (uuid_t uuid)
376 efi_guid_t *guid = (efi_guid_t *) uuid;
378 PED_ASSERT (uuid != NULL, return);
379 guid->time_low = PED_SWAP32 (guid->time_low);
380 guid->time_mid = PED_SWAP16 (guid->time_mid);
381 guid->time_hi_and_version = PED_SWAP16 (guid->time_hi_and_version);
384 /* returns the EFI-style CRC32 value for buf
385 * This function uses the crc32 function by Gary S. Brown,
386 * but seeds the function with ~0, and xor's with ~0 at the end.
388 static inline uint32_t
389 efi_crc32 (const void *buf, unsigned long len)
391 return (__efi_crc32 (buf, len, ~0L) ^ ~0L);
394 /* Compute the crc32 checksum of the partition table header
395 and store it in *CRC32. Return 0 upon success. Return 1
396 upon failure to allocate space. */
398 pth_crc32 (const PedDevice *dev, const GuidPartitionTableHeader_t *pth,
401 PED_ASSERT (dev != NULL, return 0);
402 PED_ASSERT (pth != NULL, return 0);
404 uint8_t *pth_raw = pth_get_raw (dev, pth);
408 *crc32 = efi_crc32 (pth_raw, PED_LE32_TO_CPU (pth->HeaderSize));
415 guid_cmp (efi_guid_t left, efi_guid_t right)
417 return memcmp (&left, &right, sizeof (efi_guid_t));
420 /* checks if 'mbr' is a protective MBR partition table */
422 _pmbr_is_valid (const LegacyMBR_t *mbr)
426 PED_ASSERT (mbr != NULL, return 0);
428 if (mbr->Signature != PED_CPU_TO_LE16 (MSDOS_MBR_SIGNATURE))
430 for (i = 0; i < 4; i++)
432 if (mbr->PartitionRecord[i].OSType == EFI_PMBR_OSTYPE_EFI)
439 gpt_probe (const PedDevice *dev)
441 GuidPartitionTableHeader_t *gpt = NULL;
442 uint8_t *pth_raw = ped_malloc (pth_get_size (dev));
443 int gpt_sig_found = 0;
445 PED_ASSERT (dev != NULL, return 0);
447 if (ped_device_read (dev, pth_raw, 1, GPT_HEADER_SECTORS)
448 || ped_device_read (dev, pth_raw, dev->length - 1, GPT_HEADER_SECTORS))
450 gpt = pth_new_from_raw (dev, pth_raw);
451 if (gpt->Signature == PED_CPU_TO_LE64 (GPT_HEADER_SIGNATURE))
463 if (!ptt_read_sector (dev, 0, &label))
467 if (!_pmbr_is_valid ((const LegacyMBR_t *) label))
469 int ex_status = ped_exception_throw
470 (PED_EXCEPTION_WARNING,
471 PED_EXCEPTION_YES_NO,
472 _("%s contains GPT signatures, indicating that it has "
473 "a GPT table. However, it does not have a valid "
474 "fake msdos partition table, as it should. Perhaps "
475 "it was corrupted -- possibly by a program that "
476 "doesn't understand GPT partition tables. Or "
477 "perhaps you deleted the GPT table, and are now "
478 "using an msdos partition table. Is this a GPT "
481 if (ex_status == PED_EXCEPTION_NO)
489 #ifndef DISCOVER_ONLY
490 /* writes zeros to the PMBR and the primary and alternate GPTHs and PTEs */
492 gpt_clobber (PedDevice *dev)
494 uint8_t *pth_raw = ped_malloc (pth_get_size (dev));
495 GuidPartitionTableHeader_t *gpt;
497 PED_ASSERT (dev != NULL, return 0);
500 * TO DISCUSS: check whether checksum is correct?
501 * If not, we might get a wrong AlternateLBA field and destroy
502 * one sector of random data.
504 if (!ped_device_read (dev, pth_raw,
505 GPT_PRIMARY_HEADER_LBA, GPT_HEADER_SECTORS))
511 gpt = pth_new_from_raw (dev, pth_raw);
514 if (!ptt_clear_sectors (dev, GPT_PMBR_LBA, GPT_PMBR_SECTORS))
515 goto error_free_with_gpt;
516 if (!ptt_clear_sectors (dev, GPT_PRIMARY_HEADER_LBA, GPT_HEADER_SECTORS))
517 goto error_free_with_gpt;
518 if (!ptt_clear_sectors (dev, dev->length - GPT_HEADER_SECTORS,
520 goto error_free_with_gpt;
522 if ((PedSector) PED_LE64_TO_CPU (gpt->AlternateLBA) < dev->length - 1)
524 if (!ped_device_write (dev, gpt,
525 PED_LE64_TO_CPU (gpt->AlternateLBA),
538 #endif /* !DISCOVER_ONLY */
541 gpt_alloc (const PedDevice *dev)
544 GPTDiskData *gpt_disk_data;
545 PedSector data_start, data_end;
547 disk = _ped_disk_alloc ((PedDevice *) dev, &gpt_disk_type);
550 disk->disk_specific = gpt_disk_data = ped_malloc (sizeof (GPTDiskData));
551 if (!disk->disk_specific)
552 goto error_free_disk;
554 data_start = 2 + GPT_DEFAULT_PARTITION_ENTRY_ARRAY_SIZE / dev->sector_size;
555 data_end = dev->length - 2
556 - GPT_DEFAULT_PARTITION_ENTRY_ARRAY_SIZE / dev->sector_size;
557 ped_geometry_init (&gpt_disk_data->data_area, dev, data_start,
558 data_end - data_start + 1);
559 gpt_disk_data->entry_count = GPT_DEFAULT_PARTITION_ENTRIES;
560 uuid_generate ((unsigned char *) &gpt_disk_data->uuid);
561 swap_uuid_and_efi_guid ((unsigned char *) (&gpt_disk_data->uuid));
571 gpt_duplicate (const PedDisk *disk)
574 GPTDiskData *new_disk_data;
575 GPTDiskData *old_disk_data;
577 new_disk = ped_disk_new_fresh (disk->dev, &gpt_disk_type);
581 old_disk_data = disk->disk_specific;
582 new_disk_data = new_disk->disk_specific;
584 ped_geometry_init (&new_disk_data->data_area, disk->dev,
585 old_disk_data->data_area.start,
586 old_disk_data->data_area.length);
587 new_disk_data->entry_count = old_disk_data->entry_count;
588 new_disk_data->uuid = old_disk_data->uuid;
593 gpt_free (PedDisk *disk)
595 ped_disk_delete_all (disk);
596 free (disk->disk_specific);
597 _ped_disk_free (disk);
600 /* Given GUID Partition table header, GPT, read its partition array
601 entries from DISK into malloc'd storage. Set *PTES_BYTES to the
602 number of bytes required. Upon success, return a pointer to the
603 resulting buffer. Otherwise, set errno and return NULL. */
605 gpt_read_PE_array (PedDisk const *disk, GuidPartitionTableHeader_t const *gpt,
608 GPTDiskData *gpt_disk_data = disk->disk_specific;
609 uint32_t p_ent_size = PED_LE32_TO_CPU (gpt->SizeOfPartitionEntry);
610 *ptes_bytes = p_ent_size * gpt_disk_data->entry_count;
611 size_t ptes_sectors = ped_div_round_up (*ptes_bytes,
612 disk->dev->sector_size);
614 if (xalloc_oversized (ptes_sectors, disk->dev->sector_size))
619 void *ptes = ped_malloc (ptes_sectors * disk->dev->sector_size);
623 if (!ped_device_read (disk->dev, ptes,
624 PED_LE64_TO_CPU (gpt->PartitionEntryLBA), ptes_sectors))
626 int saved_errno = errno;
636 _header_is_valid (PedDisk const *disk, GuidPartitionTableHeader_t *gpt,
639 uint32_t crc, origcrc;
640 PedDevice const *dev = disk->dev;
642 if (PED_LE64_TO_CPU (gpt->Signature) != GPT_HEADER_SIGNATURE)
645 * "While the GUID Partition Table Header's size may increase
646 * in the future it cannot span more than one block on the
647 * device." EFI Specification, version 1.10, 11.2.2.1
649 if (PED_LE32_TO_CPU (gpt->HeaderSize) < pth_get_size_static (dev)
650 || PED_LE32_TO_CPU (gpt->HeaderSize) > dev->sector_size)
653 /* The SizeOfPartitionEntry must be a multiple of 8 and
654 no smaller than the size of the PartitionEntry structure.
655 We also require that be no larger than 1/16th of UINT32_MAX,
656 as an additional sanity check. */
657 uint32_t sope = PED_LE32_TO_CPU (gpt->SizeOfPartitionEntry);
659 || sope < sizeof (GuidPartitionEntry_t) || (UINT32_MAX >> 4) < sope)
662 if (PED_LE64_TO_CPU (gpt->MyLBA) != my_lba)
665 PedSector alt_lba = PED_LE64_TO_CPU (gpt->AlternateLBA);
666 /* The backup table's AlternateLBA must be 1. */
667 if (my_lba != 1 && alt_lba != 1)
670 /* The alt_lba must never be the same as my_lba. */
671 if (alt_lba == my_lba)
674 origcrc = gpt->HeaderCRC32;
675 gpt->HeaderCRC32 = 0;
676 if (pth_crc32 (dev, gpt, &crc) != 0)
678 gpt->HeaderCRC32 = origcrc;
680 return crc == PED_LE32_TO_CPU (origcrc);
684 _parse_header (PedDisk *disk, const GuidPartitionTableHeader_t *gpt,
687 GPTDiskData *gpt_disk_data = disk->disk_specific;
688 PedSector first_usable;
689 PedSector last_usable;
690 PedSector last_usable_if_grown, last_usable_min_default;
691 static int asked_already;
693 #ifndef DISCOVER_ONLY
694 if (PED_LE32_TO_CPU (gpt->Revision) > GPT_HEADER_REVISION_V1_02)
696 if (ped_exception_throw
697 (PED_EXCEPTION_WARNING,
698 PED_EXCEPTION_IGNORE_CANCEL,
699 _("The format of the GPT partition table is version "
700 "%x, which is newer than what Parted can "
701 "recognise. Please tell us! bug-parted@gnu.org"),
702 PED_LE32_TO_CPU (gpt->Revision)) != PED_EXCEPTION_IGNORE)
707 first_usable = PED_LE64_TO_CPU (gpt->FirstUsableLBA);
708 last_usable = PED_LE64_TO_CPU (gpt->LastUsableLBA);
710 /* Need to check whether the volume has grown, the LastUsableLBA is
711 normally set to disk->dev->length - 2 - ptes_size (at least for parted
712 created volumes), where ptes_size is the number of entries *
713 size of each entry / sector size or 16k / sector size, whatever the greater.
714 If the volume has grown, offer the user the chance to use the new
715 space or continue with the current usable area. Only ask once per
716 parted invocation. */
719 = (disk->dev->length - 2 -
720 ((PedSector) (PED_LE32_TO_CPU (gpt->NumberOfPartitionEntries)) *
721 (PedSector) (PED_LE32_TO_CPU (gpt->SizeOfPartitionEntry)) /
722 disk->dev->sector_size));
724 last_usable_min_default = disk->dev->length - 2 -
725 GPT_DEFAULT_PARTITION_ENTRY_ARRAY_SIZE / disk->dev->sector_size;
727 if (last_usable_if_grown > last_usable_min_default)
729 last_usable_if_grown = last_usable_min_default;
732 PED_ASSERT (last_usable > first_usable, return 0);
733 PED_ASSERT (last_usable <= disk->dev->length, return 0);
735 PED_ASSERT (last_usable_if_grown > first_usable, return 0);
736 PED_ASSERT (last_usable_if_grown <= disk->dev->length, return 0);
738 if (!asked_already && last_usable < last_usable_if_grown)
741 PedExceptionOption q;
743 q = ped_exception_throw
744 (PED_EXCEPTION_WARNING,
745 PED_EXCEPTION_FIX | PED_EXCEPTION_IGNORE,
746 _("Not all of the space available to %s appears "
747 "to be used, you can fix the GPT to use all of the "
748 "space (an extra %llu blocks) or continue with the "
749 "current setting? "), disk->dev->path,
750 (uint64_t) (last_usable_if_grown - last_usable));
752 if (q == PED_EXCEPTION_FIX)
754 last_usable = last_usable_if_grown;
757 else if (q != PED_EXCEPTION_UNHANDLED)
763 ped_geometry_init (&gpt_disk_data->data_area, disk->dev,
764 first_usable, last_usable - first_usable + 1);
766 gpt_disk_data->entry_count
767 = PED_LE32_TO_CPU (gpt->NumberOfPartitionEntries);
768 PED_ASSERT (gpt_disk_data->entry_count > 0, return 0);
769 PED_ASSERT (gpt_disk_data->entry_count <= 8192, return 0);
771 gpt_disk_data->uuid = gpt->DiskGUID;
776 static PedPartition *
777 _parse_part_entry (PedDisk *disk, GuidPartitionEntry_t *pte)
780 GPTPartitionData *gpt_part_data;
783 part = ped_partition_new (disk, PED_PARTITION_NORMAL, NULL,
784 PED_LE64_TO_CPU (pte->StartingLBA),
785 PED_LE64_TO_CPU (pte->EndingLBA));
789 gpt_part_data = part->disk_specific;
790 gpt_part_data->type = pte->PartitionTypeGuid;
791 gpt_part_data->uuid = pte->UniquePartitionGuid;
792 for (i = 0; i < 72 / sizeof (efi_char16_t); i++)
793 gpt_part_data->name[i] =
794 (efi_char16_t) PED_LE16_TO_CPU ((uint16_t) pte->PartitionName[i]);
795 gpt_part_data->name[i] = 0;
797 gpt_part_data->lvm = gpt_part_data->raid
798 = gpt_part_data->boot = gpt_part_data->hp_service
799 = gpt_part_data->hidden = gpt_part_data->msftres
800 = gpt_part_data->bios_grub = 0;
802 if (pte->Attributes.RequiredToFunction & 0x1)
803 gpt_part_data->hidden = 1;
805 if (!guid_cmp (gpt_part_data->type, PARTITION_SYSTEM_GUID))
806 gpt_part_data->boot = 1;
807 else if (!guid_cmp (gpt_part_data->type, PARTITION_BIOS_GRUB_GUID))
808 gpt_part_data->bios_grub = 1;
809 else if (!guid_cmp (gpt_part_data->type, PARTITION_RAID_GUID))
810 gpt_part_data->raid = 1;
811 else if (!guid_cmp (gpt_part_data->type, PARTITION_LVM_GUID))
812 gpt_part_data->lvm = 1;
813 else if (!guid_cmp (gpt_part_data->type, PARTITION_HPSERVICE_GUID))
814 gpt_part_data->hp_service = 1;
815 else if (!guid_cmp (gpt_part_data->type, PARTITION_MSFT_RESERVED_GUID))
816 gpt_part_data->msftres = 1;
821 /* Read the primary GPT at sector 1 of DEV.
822 Verify its CRC and that of its partition entry array.
823 If they are valid, read the backup GPT specified by AlternateLBA.
824 If not, read the backup GPT in the last sector of the disk.
825 Return 1 if any read fails.
826 Upon successful verification of the primary GPT, set *PRIMARY_GPT, else NULL.
827 Upon successful verification of the backup GPT, set *BACKUP_GPT, else NULL.
828 If we've set *BACKUP_GPT to non-NULL, set *BACKUP_LBA to the sector
829 number in which it was found. */
831 gpt_read_headers (PedDisk const *disk,
832 GuidPartitionTableHeader_t **primary_gpt,
833 GuidPartitionTableHeader_t **backup_gpt,
834 PedSector *backup_sector_num_p)
838 PedDevice const *dev = disk->dev;
841 if (!ptt_read_sector (dev, 1, &s1))
844 GuidPartitionTableHeader_t *t = pth_new_from_raw (dev, s1);
848 GuidPartitionTableHeader_t *pri = t;
850 bool valid_primary = _header_is_valid (disk, pri, 1);
854 PedSector backup_sector_num =
856 ? PED_LE64_TO_CPU (pri->AlternateLBA)
860 if (!ptt_read_sector (dev, backup_sector_num, &s_bak))
862 t = pth_new_from_raw (dev, s_bak);
866 GuidPartitionTableHeader_t *bak = t;
867 if (_header_is_valid (disk, bak, backup_sector_num))
870 *backup_sector_num_p = backup_sector_num;
876 /************************************************************
877 * Intel is changing the EFI Spec. (after v1.02) to say that a
878 * disk is considered to have a GPT label only if the GPT
879 * structures are correct, and the MBR is actually a Protective
880 * MBR (has one 0xEE type partition).
881 * Problem occurs when a GPT-partitioned disk is then
882 * edited with a legacy (non-GPT-aware) application, such as
883 * fdisk (which doesn't generally erase the PGPT or AGPT).
884 * How should such a disk get handled? As a GPT disk (throwing
885 * away the fdisk changes), or as an MSDOS disk (throwing away
886 * the GPT information). Previously, I've taken the GPT-is-right,
887 * MBR is wrong, approach, to stay consistent with the EFI Spec.
888 * Intel disagrees, saying the disk should then be treated
889 * as having a msdos label, not a GPT label. If this is true,
890 * then what's the point of having an AGPT, since if the PGPT
891 * is screwed up, likely the PMBR is too, and the PMBR becomes
892 * a single point of failure.
893 * So, in the Linux kernel, I'm going to test for PMBR, and
894 * warn if it's not there, and treat the disk as MSDOS, with a note
895 * for users to use Parted to "fix up" their disk if they
896 * really want it to be considered GPT.
897 ************************************************************/
899 gpt_read (PedDisk *disk)
901 GPTDiskData *gpt_disk_data = disk->disk_specific;
903 #ifndef DISCOVER_ONLY
907 ped_disk_delete_all (disk);
909 /* motivation: let the user decide about the pmbr... during
910 ped_disk_probe(), they probably didn't get a choice... */
911 if (!gpt_probe (disk->dev))
914 GuidPartitionTableHeader_t *gpt = NULL;
915 GuidPartitionTableHeader_t *primary_gpt;
916 GuidPartitionTableHeader_t *backup_gpt;
917 PedSector backup_sector_num;
918 int read_failure = gpt_read_headers (disk, &primary_gpt, &backup_gpt,
922 /* This includes the case in which there used to be a GPT partition
923 table here, with an alternate LBA that extended beyond the current
924 end-of-device. It's treated as a non-match. */
926 /* Another possibility:
927 The primary header is ok, but backup is corrupt.
928 In the UEFI spec, this means the primary GUID table
929 is officially invalid. */
930 pth_free (backup_gpt);
931 pth_free (primary_gpt);
935 if (primary_gpt && backup_gpt)
937 /* Both are valid. */
938 if (PED_LE64_TO_CPU (primary_gpt->AlternateLBA) < disk->dev->length - 1)
940 #ifndef DISCOVER_ONLY
941 switch (ped_exception_throw
942 (PED_EXCEPTION_ERROR,
943 (PED_EXCEPTION_FIX | PED_EXCEPTION_CANCEL
944 | PED_EXCEPTION_IGNORE),
945 _("The backup GPT table is not at the end of the disk, as it "
946 "should be. This might mean that another operating system "
947 "believes the disk is smaller. Fix, by moving the backup "
948 "to the end (and removing the old backup)?")))
950 case PED_EXCEPTION_CANCEL:
952 case PED_EXCEPTION_FIX:
953 ptt_clear_sectors (disk->dev,
954 PED_LE64_TO_CPU (primary_gpt->AlternateLBA), 1);
960 #endif /* !DISCOVER_ONLY */
963 pth_free (backup_gpt);
965 else if (!primary_gpt && !backup_gpt)
967 /* Both are corrupt. */
968 ped_exception_throw (PED_EXCEPTION_ERROR, PED_EXCEPTION_CANCEL,
969 _("Both the primary and backup GPT tables "
970 "are corrupt. Try making a fresh table, "
971 "and using Parted's rescue feature to "
972 "recover partitions."));
975 else if (primary_gpt && !backup_gpt)
977 /* The primary header is ok, but backup is corrupt. */
978 if (ped_exception_throw
979 (PED_EXCEPTION_ERROR, PED_EXCEPTION_OK_CANCEL,
980 _("The backup GPT table is corrupt, but the "
981 "primary appears OK, so that will be used."))
982 == PED_EXCEPTION_CANCEL)
987 else /* !primary_gpt && backup_gpt */
989 /* primary GPT corrupt, backup is ok. */
990 if (ped_exception_throw
991 (PED_EXCEPTION_ERROR, PED_EXCEPTION_OK_CANCEL,
992 _("The primary GPT table is corrupt, but the "
993 "backup appears OK, so that will be used."))
994 == PED_EXCEPTION_CANCEL)
1002 if (!_parse_header (disk, gpt, &write_back))
1003 goto error_free_gpt;
1006 void *ptes = gpt_read_PE_array (disk, gpt, &ptes_bytes);
1008 goto error_free_gpt;
1010 uint32_t ptes_crc = efi_crc32 (ptes, ptes_bytes);
1011 if (ptes_crc != gpt->PartitionEntryArrayCRC32)
1014 (PED_EXCEPTION_ERROR,
1015 PED_EXCEPTION_CANCEL,
1016 _("primary partition table array CRC mismatch"));
1017 goto error_free_ptes;
1020 uint32_t p_ent_size = PED_LE32_TO_CPU (gpt->SizeOfPartitionEntry);
1021 for (i = 0; i < gpt_disk_data->entry_count; i++)
1023 GuidPartitionEntry_t *pte
1024 = (GuidPartitionEntry_t *) ((char *) ptes + i * p_ent_size);
1026 PedConstraint *constraint_exact;
1028 if (!guid_cmp (pte->PartitionTypeGuid, UNUSED_ENTRY_GUID))
1031 part = _parse_part_entry (disk, pte);
1033 goto error_delete_all;
1035 part->fs_type = ped_file_system_probe (&part->geom);
1038 constraint_exact = ped_constraint_exact (&part->geom);
1039 if (!ped_disk_add_partition (disk, part, constraint_exact))
1041 ped_partition_destroy (part);
1042 goto error_delete_all;
1044 ped_constraint_destroy (constraint_exact);
1048 #ifndef DISCOVER_ONLY
1050 ped_disk_commit_to_dev (disk);
1057 ped_disk_delete_all (disk);
1061 pth_free (primary_gpt);
1062 pth_free (backup_gpt);
1068 #ifndef DISCOVER_ONLY
1069 /* Write the protective MBR (to keep DOS happy) */
1071 _write_pmbr (PedDevice *dev)
1073 /* The UEFI spec is not clear about what to do with the following
1074 elements of the Protective MBR (pmbr): BootCode (0-440B),
1075 UniqueMBRSignature (440B-444B) and Unknown (444B-446B).
1076 With this in mind, we try not to modify these elements. */
1078 if (!ptt_read_sector (dev, 0, &s0))
1080 LegacyMBR_t *pmbr = s0;
1082 /* Zero out the legacy partitions. */
1083 memset (pmbr->PartitionRecord, 0, sizeof pmbr->PartitionRecord);
1085 pmbr->Signature = PED_CPU_TO_LE16 (MSDOS_MBR_SIGNATURE);
1086 pmbr->PartitionRecord[0].OSType = EFI_PMBR_OSTYPE_EFI;
1087 pmbr->PartitionRecord[0].StartSector = 1;
1088 pmbr->PartitionRecord[0].EndHead = 0xFE;
1089 pmbr->PartitionRecord[0].EndSector = 0xFF;
1090 pmbr->PartitionRecord[0].EndTrack = 0xFF;
1091 pmbr->PartitionRecord[0].StartingLBA = PED_CPU_TO_LE32 (1);
1092 if ((dev->length - 1ULL) > 0xFFFFFFFFULL)
1093 pmbr->PartitionRecord[0].SizeInLBA = PED_CPU_TO_LE32 (0xFFFFFFFF);
1095 pmbr->PartitionRecord[0].SizeInLBA = PED_CPU_TO_LE32 (dev->length - 1UL);
1097 int write_ok = ped_device_write (dev, pmbr, GPT_PMBR_LBA,
1104 _generate_header (const PedDisk *disk, int alternate, uint32_t ptes_crc,
1105 GuidPartitionTableHeader_t **gpt_p)
1107 GPTDiskData *gpt_disk_data = disk->disk_specific;
1108 GuidPartitionTableHeader_t *gpt;
1110 *gpt_p = pth_new_zeroed (disk->dev);
1114 gpt->Signature = PED_CPU_TO_LE64 (GPT_HEADER_SIGNATURE);
1115 gpt->Revision = PED_CPU_TO_LE32 (GPT_HEADER_REVISION_V1_00);
1118 gpt->HeaderSize = PED_CPU_TO_LE32 (pth_get_size_static (disk->dev));
1119 gpt->HeaderCRC32 = 0;
1124 PedSector ptes_size = gpt_disk_data->entry_count
1125 * sizeof (GuidPartitionEntry_t) / disk->dev->sector_size;
1127 gpt->MyLBA = PED_CPU_TO_LE64 (disk->dev->length - 1);
1128 gpt->AlternateLBA = PED_CPU_TO_LE64 (1);
1129 gpt->PartitionEntryLBA
1130 = PED_CPU_TO_LE64 (disk->dev->length - 1 - ptes_size);
1134 gpt->MyLBA = PED_CPU_TO_LE64 (1);
1135 gpt->AlternateLBA = PED_CPU_TO_LE64 (disk->dev->length - 1);
1136 gpt->PartitionEntryLBA = PED_CPU_TO_LE64 (2);
1139 gpt->FirstUsableLBA = PED_CPU_TO_LE64 (gpt_disk_data->data_area.start);
1140 gpt->LastUsableLBA = PED_CPU_TO_LE64 (gpt_disk_data->data_area.end);
1141 gpt->DiskGUID = gpt_disk_data->uuid;
1142 gpt->NumberOfPartitionEntries
1143 = PED_CPU_TO_LE32 (gpt_disk_data->entry_count);
1144 gpt->SizeOfPartitionEntry = PED_CPU_TO_LE32 (sizeof (GuidPartitionEntry_t));
1145 gpt->PartitionEntryArrayCRC32 = PED_CPU_TO_LE32 (ptes_crc);
1148 if (pth_crc32 (disk->dev, gpt, &crc) != 0)
1151 gpt->HeaderCRC32 = PED_CPU_TO_LE32 (crc);
1156 _partition_generate_part_entry (PedPartition *part, GuidPartitionEntry_t *pte)
1158 GPTPartitionData *gpt_part_data = part->disk_specific;
1161 PED_ASSERT (gpt_part_data != NULL, return);
1163 pte->PartitionTypeGuid = gpt_part_data->type;
1164 pte->UniquePartitionGuid = gpt_part_data->uuid;
1165 pte->StartingLBA = PED_CPU_TO_LE64 (part->geom.start);
1166 pte->EndingLBA = PED_CPU_TO_LE64 (part->geom.end);
1167 memset (&pte->Attributes, 0, sizeof (GuidPartitionEntryAttributes_t));
1169 if (gpt_part_data->hidden)
1170 pte->Attributes.RequiredToFunction = 1;
1172 for (i = 0; i < 72 / sizeof (efi_char16_t); i++)
1173 pte->PartitionName[i]
1174 = (efi_char16_t) PED_CPU_TO_LE16 ((uint16_t) gpt_part_data->name[i]);
1178 gpt_write (const PedDisk *disk)
1180 GPTDiskData *gpt_disk_data;
1181 GuidPartitionEntry_t *ptes;
1184 GuidPartitionTableHeader_t *gpt;
1188 PED_ASSERT (disk != NULL, goto error);
1189 PED_ASSERT (disk->dev != NULL, goto error);
1190 PED_ASSERT (disk->disk_specific != NULL, goto error);
1192 gpt_disk_data = disk->disk_specific;
1194 ptes_size = sizeof (GuidPartitionEntry_t) * gpt_disk_data->entry_count;
1195 ptes = (GuidPartitionEntry_t *) ped_malloc (ptes_size);
1198 memset (ptes, 0, ptes_size);
1199 for (part = ped_disk_next_partition (disk, NULL); part;
1200 part = ped_disk_next_partition (disk, part))
1202 if (part->type != 0)
1204 _partition_generate_part_entry (part, &ptes[part->num - 1]);
1207 ptes_crc = efi_crc32 (ptes, ptes_size);
1209 /* Write protective MBR */
1210 if (!_write_pmbr (disk->dev))
1211 goto error_free_ptes;
1213 /* Write PTH and PTEs */
1214 if (_generate_header (disk, 0, ptes_crc, &gpt) != 0)
1215 goto error_free_ptes;
1216 if ((pth_raw = pth_get_raw (disk->dev, gpt)) == NULL)
1217 goto error_free_ptes;
1219 bool write_ok = ped_device_write (disk->dev, pth_raw, 1, 1);
1222 goto error_free_ptes;
1223 if (!ped_device_write (disk->dev, ptes, 2,
1224 ptes_size / disk->dev->sector_size))
1225 goto error_free_ptes;
1227 /* Write Alternate PTH & PTEs */
1228 if (_generate_header (disk, 1, ptes_crc, &gpt) != 0)
1229 goto error_free_ptes;
1230 if ((pth_raw = pth_get_raw (disk->dev, gpt)) == NULL)
1231 goto error_free_ptes;
1233 write_ok = ped_device_write (disk->dev, pth_raw, disk->dev->length - 1, 1);
1236 goto error_free_ptes;
1237 if (!ped_device_write (disk->dev, ptes,
1238 disk->dev->length - 1 -
1239 ptes_size / disk->dev->sector_size,
1240 ptes_size / disk->dev->sector_size))
1241 goto error_free_ptes;
1244 return ped_device_sync (disk->dev);
1252 #endif /* !DISCOVER_ONLY */
1255 add_metadata_part (PedDisk *disk, PedSector start, PedSector length)
1258 PedConstraint *constraint_exact;
1259 PED_ASSERT (disk != NULL, return 0);
1261 part = ped_partition_new (disk, PED_PARTITION_METADATA, NULL,
1262 start, start + length - 1);
1266 constraint_exact = ped_constraint_exact (&part->geom);
1267 if (!ped_disk_add_partition (disk, part, constraint_exact))
1268 goto error_destroy_constraint;
1269 ped_constraint_destroy (constraint_exact);
1272 error_destroy_constraint:
1273 ped_constraint_destroy (constraint_exact);
1274 ped_partition_destroy (part);
1279 static PedPartition *
1280 gpt_partition_new (const PedDisk *disk,
1281 PedPartitionType part_type,
1282 const PedFileSystemType *fs_type, PedSector start,
1286 GPTPartitionData *gpt_part_data;
1288 part = _ped_partition_alloc (disk, part_type, fs_type, start, end);
1295 gpt_part_data = part->disk_specific =
1296 ped_malloc (sizeof (GPTPartitionData));
1298 goto error_free_part;
1300 gpt_part_data->type = PARTITION_BASIC_DATA_GUID;
1301 gpt_part_data->lvm = 0;
1302 gpt_part_data->raid = 0;
1303 gpt_part_data->boot = 0;
1304 gpt_part_data->bios_grub = 0;
1305 gpt_part_data->hp_service = 0;
1306 gpt_part_data->hidden = 0;
1307 gpt_part_data->msftres = 0;
1308 uuid_generate ((unsigned char *) &gpt_part_data->uuid);
1309 swap_uuid_and_efi_guid ((unsigned char *) (&gpt_part_data->uuid));
1310 memset (gpt_part_data->name, 0, sizeof gpt_part_data->name);
1314 _ped_partition_free (part);
1319 static PedPartition *
1320 gpt_partition_duplicate (const PedPartition *part)
1322 PedPartition *result;
1323 GPTPartitionData *part_data = part->disk_specific;
1324 GPTPartitionData *result_data;
1326 result = _ped_partition_alloc (part->disk, part->type, part->fs_type,
1327 part->geom.start, part->geom.end);
1330 result->num = part->num;
1332 if (result->type != 0)
1335 result_data = result->disk_specific =
1336 ped_malloc (sizeof (GPTPartitionData));
1338 goto error_free_part;
1340 result_data->type = part_data->type;
1341 result_data->uuid = part_data->uuid;
1342 strcpy (result_data->name, part_data->name);
1346 _ped_partition_free (result);
1352 gpt_partition_destroy (PedPartition *part)
1354 if (part->type == 0)
1356 PED_ASSERT (part->disk_specific != NULL, return);
1357 free (part->disk_specific);
1360 _ped_partition_free (part);
1364 gpt_partition_set_system (PedPartition *part,
1365 const PedFileSystemType *fs_type)
1367 GPTPartitionData *gpt_part_data = part->disk_specific;
1369 PED_ASSERT (gpt_part_data != NULL, return 0);
1371 part->fs_type = fs_type;
1373 if (gpt_part_data->lvm)
1375 gpt_part_data->type = PARTITION_LVM_GUID;
1378 if (gpt_part_data->raid)
1380 gpt_part_data->type = PARTITION_RAID_GUID;
1383 if (gpt_part_data->boot)
1385 gpt_part_data->type = PARTITION_SYSTEM_GUID;
1388 if (gpt_part_data->bios_grub)
1390 gpt_part_data->type = PARTITION_BIOS_GRUB_GUID;
1393 if (gpt_part_data->hp_service)
1395 gpt_part_data->type = PARTITION_HPSERVICE_GUID;
1398 if (gpt_part_data->msftres)
1400 gpt_part_data->type = PARTITION_MSFT_RESERVED_GUID;
1406 if (strncmp (fs_type->name, "fat", 3) == 0
1407 || strcmp (fs_type->name, "ntfs") == 0)
1409 gpt_part_data->type = PARTITION_BASIC_DATA_GUID;
1412 if (strncmp (fs_type->name, "hfs", 3) == 0)
1414 gpt_part_data->type = PARTITION_APPLE_HFS_GUID;
1417 if (strstr (fs_type->name, "swap"))
1419 gpt_part_data->type = PARTITION_SWAP_GUID;
1424 gpt_part_data->type = PARTITION_BASIC_DATA_GUID;
1428 /* Allocate metadata partitions for the GPTH and PTES */
1430 gpt_alloc_metadata (PedDisk *disk)
1432 PedSector gptlength, pteslength = 0;
1433 GPTDiskData *gpt_disk_data;
1435 PED_ASSERT (disk != NULL, return 0);
1436 PED_ASSERT (disk->dev != NULL, return 0);
1437 PED_ASSERT (disk->disk_specific != NULL, return 0);
1438 gpt_disk_data = disk->disk_specific;
1440 gptlength = ped_div_round_up (sizeof (GuidPartitionTableHeader_t),
1441 disk->dev->sector_size);
1442 pteslength = ped_div_round_up (gpt_disk_data->entry_count
1443 * sizeof (GuidPartitionEntry_t),
1444 disk->dev->sector_size);
1446 /* metadata at the start of the disk includes the MBR */
1447 if (!add_metadata_part (disk, GPT_PMBR_LBA,
1448 GPT_PMBR_SECTORS + gptlength + pteslength))
1451 /* metadata at the end of the disk */
1452 if (!add_metadata_part (disk, disk->dev->length - gptlength - pteslength,
1453 gptlength + pteslength))
1459 /* Does nothing, as the read/new/destroy functions maintain part->num */
1461 gpt_partition_enumerate (PedPartition *part)
1463 GPTDiskData *gpt_disk_data = part->disk->disk_specific;
1466 /* never change the partition numbers */
1467 if (part->num != -1)
1470 for (i = 1; i <= gpt_disk_data->entry_count; i++)
1472 if (!ped_disk_get_partition (part->disk, i))
1479 PED_ASSERT (0, return 0);
1481 return 0; /* used if debug is disabled */
1485 gpt_partition_set_flag (PedPartition *part, PedPartitionFlag flag, int state)
1487 GPTPartitionData *gpt_part_data;
1488 PED_ASSERT (part != NULL, return 0);
1489 PED_ASSERT (part->disk_specific != NULL, return 0);
1490 gpt_part_data = part->disk_specific;
1494 case PED_PARTITION_BOOT:
1495 gpt_part_data->boot = state;
1498 = gpt_part_data->lvm
1499 = gpt_part_data->bios_grub
1500 = gpt_part_data->hp_service = gpt_part_data->msftres = 0;
1501 return gpt_partition_set_system (part, part->fs_type);
1502 case PED_PARTITION_BIOS_GRUB:
1503 gpt_part_data->bios_grub = state;
1506 = gpt_part_data->lvm
1507 = gpt_part_data->boot
1508 = gpt_part_data->hp_service = gpt_part_data->msftres = 0;
1509 return gpt_partition_set_system (part, part->fs_type);
1510 case PED_PARTITION_RAID:
1511 gpt_part_data->raid = state;
1514 = gpt_part_data->lvm
1515 = gpt_part_data->bios_grub
1516 = gpt_part_data->hp_service = gpt_part_data->msftres = 0;
1517 return gpt_partition_set_system (part, part->fs_type);
1518 case PED_PARTITION_LVM:
1519 gpt_part_data->lvm = state;
1522 = gpt_part_data->raid
1523 = gpt_part_data->bios_grub
1524 = gpt_part_data->hp_service = gpt_part_data->msftres = 0;
1525 return gpt_partition_set_system (part, part->fs_type);
1526 case PED_PARTITION_HPSERVICE:
1527 gpt_part_data->hp_service = state;
1530 = gpt_part_data->raid
1531 = gpt_part_data->lvm
1532 = gpt_part_data->bios_grub = gpt_part_data->msftres = 0;
1533 return gpt_partition_set_system (part, part->fs_type);
1534 case PED_PARTITION_MSFT_RESERVED:
1535 gpt_part_data->msftres = state;
1538 = gpt_part_data->raid
1539 = gpt_part_data->lvm
1540 = gpt_part_data->bios_grub = gpt_part_data->hp_service = 0;
1541 return gpt_partition_set_system (part, part->fs_type);
1542 case PED_PARTITION_HIDDEN:
1543 gpt_part_data->hidden = state;
1545 case PED_PARTITION_SWAP:
1546 case PED_PARTITION_ROOT:
1547 case PED_PARTITION_LBA:
1555 gpt_partition_get_flag (const PedPartition *part, PedPartitionFlag flag)
1557 GPTPartitionData *gpt_part_data;
1558 PED_ASSERT (part->disk_specific != NULL, return 0);
1559 gpt_part_data = part->disk_specific;
1563 case PED_PARTITION_RAID:
1564 return gpt_part_data->raid;
1565 case PED_PARTITION_LVM:
1566 return gpt_part_data->lvm;
1567 case PED_PARTITION_BOOT:
1568 return gpt_part_data->boot;
1569 case PED_PARTITION_BIOS_GRUB:
1570 return gpt_part_data->bios_grub;
1571 case PED_PARTITION_HPSERVICE:
1572 return gpt_part_data->hp_service;
1573 case PED_PARTITION_MSFT_RESERVED:
1574 return gpt_part_data->msftres;
1575 case PED_PARTITION_HIDDEN:
1576 return gpt_part_data->hidden;
1577 case PED_PARTITION_SWAP:
1578 case PED_PARTITION_LBA:
1579 case PED_PARTITION_ROOT:
1587 gpt_partition_is_flag_available (const PedPartition *part,
1588 PedPartitionFlag flag)
1592 case PED_PARTITION_RAID:
1593 case PED_PARTITION_LVM:
1594 case PED_PARTITION_BOOT:
1595 case PED_PARTITION_BIOS_GRUB:
1596 case PED_PARTITION_HPSERVICE:
1597 case PED_PARTITION_MSFT_RESERVED:
1598 case PED_PARTITION_HIDDEN:
1600 case PED_PARTITION_SWAP:
1601 case PED_PARTITION_ROOT:
1602 case PED_PARTITION_LBA:
1610 gpt_partition_set_name (PedPartition *part, const char *name)
1612 GPTPartitionData *gpt_part_data = part->disk_specific;
1614 strncpy (gpt_part_data->name, name, 36);
1615 gpt_part_data->name[36] = 0;
1619 gpt_partition_get_name (const PedPartition *part)
1621 GPTPartitionData *gpt_part_data = part->disk_specific;
1622 return gpt_part_data->name;
1626 gpt_get_max_primary_partition_count (const PedDisk *disk)
1628 const GPTDiskData *gpt_disk_data = disk->disk_specific;
1629 return gpt_disk_data->entry_count;
1633 * From (http://developer.apple.com/technotes/tn2006/tn2166.html Chapter 5).
1634 * According to the specs the first LBA (LBA0) is not relevant (it exists
1635 * to maintain compatibility). on the second LBA(LBA1) gpt places the
1636 * header. The header is as big as the block size. After the header we
1637 * find the Entry array. Each element of said array, describes each
1638 * partition. One can have as much elements as can fit between the end of
1639 * the second LBA (where the header ends) and the FirstUsableLBA.
1640 * FirstUsableLBA is the first logical block that is used for contents
1641 * and is defined in header.
1643 * /---------------------------------------------------\
1644 * | BLOCK0 | HEADER | Entry Array | First Usable LBA |
1646 * \---------------------------------------------------/
1648 * /----------/ \----------\
1649 * /-----------------------------------------\
1650 * | E1 | E2 | E3 |...............| EN |
1651 * \-----------------------------------------/
1653 * The number of possible partitions or supported partitions is:
1654 * SP = FirstUsableLBA*Blocksize - 2*Blocksize / SizeOfPartitionEntry
1655 * SP = Blocksize(FirstusableLBA - 2) / SizeOfPartitoinEntry
1658 gpt_get_max_supported_partition_count (const PedDisk *disk, int *max_n)
1660 GuidPartitionTableHeader_t *pth = NULL;
1661 uint8_t *pth_raw = ped_malloc (pth_get_size (disk->dev));
1663 if (ped_device_read (disk->dev, pth_raw, 1, GPT_HEADER_SECTORS)
1664 || ped_device_read (disk->dev, pth_raw,
1665 disk->dev->length, GPT_HEADER_SECTORS))
1666 pth = pth_new_from_raw (disk->dev, pth_raw);
1672 *max_n = (disk->dev->sector_size * (pth->FirstUsableLBA - 2)
1673 / PED_LE32_TO_CPU (pth->SizeOfPartitionEntry));
1678 static PedConstraint *
1679 _non_metadata_constraint (const PedDisk *disk)
1681 GPTDiskData *gpt_disk_data = disk->disk_specific;
1683 return ped_constraint_new_from_max (&gpt_disk_data->data_area);
1687 gpt_partition_align (PedPartition *part, const PedConstraint *constraint)
1689 PED_ASSERT (part != NULL, return 0);
1691 if (_ped_partition_attempt_align (part, constraint,
1692 _non_metadata_constraint (part->disk)))
1695 #ifndef DISCOVER_ONLY
1696 ped_exception_throw (PED_EXCEPTION_ERROR,
1697 PED_EXCEPTION_CANCEL,
1698 _("Unable to satisfy all constraints on the partition."));
1704 gpt_partition_check (const PedPartition *part)
1709 #ifdef DISCOVER_ONLY
1710 # define NULL_IF_DISCOVER_ONLY(val) NULL
1712 # define NULL_IF_DISCOVER_ONLY(val) val
1715 static PedDiskOps gpt_disk_ops =
1718 clobber: NULL_IF_DISCOVER_ONLY (gpt_clobber),
1720 duplicate: gpt_duplicate,
1723 write: NULL_IF_DISCOVER_ONLY (gpt_write),
1724 partition_new: gpt_partition_new,
1725 partition_duplicate: gpt_partition_duplicate,
1726 partition_destroy: gpt_partition_destroy,
1727 partition_set_system: gpt_partition_set_system,
1728 partition_set_flag: gpt_partition_set_flag,
1729 partition_get_flag: gpt_partition_get_flag,
1730 partition_is_flag_available: gpt_partition_is_flag_available,
1731 partition_set_name: gpt_partition_set_name,
1732 partition_get_name: gpt_partition_get_name,
1733 partition_align: gpt_partition_align,
1734 partition_enumerate: gpt_partition_enumerate,
1735 partition_check: gpt_partition_check,
1736 alloc_metadata: gpt_alloc_metadata,
1737 get_max_primary_partition_count: gpt_get_max_primary_partition_count,
1738 get_max_supported_partition_count: gpt_get_max_supported_partition_count
1741 static PedDiskType gpt_disk_type =
1746 features: PED_DISK_TYPE_PARTITION_NAME
1750 ped_disk_gpt_init ()
1752 PED_ASSERT (sizeof (GuidPartitionEntryAttributes_t) == 8, return);
1753 PED_ASSERT (sizeof (GuidPartitionEntry_t) == 128, return);
1755 ped_disk_type_register (&gpt_disk_type);
1759 ped_disk_gpt_done ()
1761 ped_disk_type_unregister (&gpt_disk_type);