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 check_PE_array_CRC (PedDisk const *disk,
637 GuidPartitionTableHeader_t const *gpt, bool *valid)
640 void *ptes = gpt_read_PE_array (disk, gpt, &ptes_bytes);
644 uint32_t ptes_crc = efi_crc32 (ptes, ptes_bytes);
645 *valid = (ptes_crc == gpt->PartitionEntryArrayCRC32);
651 _header_is_valid (PedDisk const *disk, GuidPartitionTableHeader_t *gpt,
654 uint32_t crc, origcrc;
655 PedDevice const *dev = disk->dev;
657 if (PED_LE64_TO_CPU (gpt->Signature) != GPT_HEADER_SIGNATURE)
660 * "While the GUID Partition Table Header's size may increase
661 * in the future it cannot span more than one block on the
662 * device." EFI Specification, version 1.10, 11.2.2.1
664 if (PED_LE32_TO_CPU (gpt->HeaderSize) < pth_get_size_static (dev)
665 || PED_LE32_TO_CPU (gpt->HeaderSize) > dev->sector_size)
668 /* The SizeOfPartitionEntry must be a multiple of 8 and
669 no smaller than the size of the PartitionEntry structure.
670 We also require that be no larger than 1/16th of UINT32_MAX,
671 as an additional sanity check. */
672 uint32_t sope = PED_LE32_TO_CPU (gpt->SizeOfPartitionEntry);
674 || sope < sizeof (GuidPartitionEntry_t) || (UINT32_MAX >> 4) < sope)
677 if (PED_LE64_TO_CPU (gpt->MyLBA) != my_lba)
680 PedSector alt_lba = PED_LE64_TO_CPU (gpt->AlternateLBA);
681 /* The backup table's AlternateLBA must be 1. */
682 if (my_lba != 1 && alt_lba != 1)
685 /* The alt_lba must never be the same as my_lba. */
686 if (alt_lba == my_lba)
690 if (check_PE_array_CRC (disk, gpt, &crc_match) != 0 || !crc_match)
693 origcrc = gpt->HeaderCRC32;
694 gpt->HeaderCRC32 = 0;
695 if (pth_crc32 (dev, gpt, &crc) != 0)
697 gpt->HeaderCRC32 = origcrc;
699 return crc == PED_LE32_TO_CPU (origcrc);
703 _parse_header (PedDisk *disk, const GuidPartitionTableHeader_t *gpt,
706 GPTDiskData *gpt_disk_data = disk->disk_specific;
707 PedSector first_usable;
708 PedSector last_usable;
709 PedSector last_usable_if_grown, last_usable_min_default;
710 static int asked_already;
712 #ifndef DISCOVER_ONLY
713 if (PED_LE32_TO_CPU (gpt->Revision) > GPT_HEADER_REVISION_V1_02)
715 if (ped_exception_throw
716 (PED_EXCEPTION_WARNING,
717 PED_EXCEPTION_IGNORE_CANCEL,
718 _("The format of the GPT partition table is version "
719 "%x, which is newer than what Parted can "
720 "recognise. Please tell us! bug-parted@gnu.org"),
721 PED_LE32_TO_CPU (gpt->Revision)) != PED_EXCEPTION_IGNORE)
726 first_usable = PED_LE64_TO_CPU (gpt->FirstUsableLBA);
727 last_usable = PED_LE64_TO_CPU (gpt->LastUsableLBA);
729 /* Need to check whether the volume has grown, the LastUsableLBA is
730 normally set to disk->dev->length - 2 - ptes_size (at least for parted
731 created volumes), where ptes_size is the number of entries *
732 size of each entry / sector size or 16k / sector size, whatever the greater.
733 If the volume has grown, offer the user the chance to use the new
734 space or continue with the current usable area. Only ask once per
735 parted invocation. */
738 = (disk->dev->length - 2 -
739 ((PedSector) (PED_LE32_TO_CPU (gpt->NumberOfPartitionEntries)) *
740 (PedSector) (PED_LE32_TO_CPU (gpt->SizeOfPartitionEntry)) /
741 disk->dev->sector_size));
743 last_usable_min_default = disk->dev->length - 2 -
744 GPT_DEFAULT_PARTITION_ENTRY_ARRAY_SIZE / disk->dev->sector_size;
746 if (last_usable_if_grown > last_usable_min_default)
748 last_usable_if_grown = last_usable_min_default;
751 PED_ASSERT (last_usable > first_usable, return 0);
752 PED_ASSERT (last_usable <= disk->dev->length, return 0);
754 PED_ASSERT (last_usable_if_grown > first_usable, return 0);
755 PED_ASSERT (last_usable_if_grown <= disk->dev->length, return 0);
757 if (!asked_already && last_usable < last_usable_if_grown)
760 PedExceptionOption q;
762 q = ped_exception_throw
763 (PED_EXCEPTION_WARNING,
764 PED_EXCEPTION_FIX | PED_EXCEPTION_IGNORE,
765 _("Not all of the space available to %s appears "
766 "to be used, you can fix the GPT to use all of the "
767 "space (an extra %llu blocks) or continue with the "
768 "current setting? "), disk->dev->path,
769 (uint64_t) (last_usable_if_grown - last_usable));
771 if (q == PED_EXCEPTION_FIX)
773 last_usable = last_usable_if_grown;
776 else if (q != PED_EXCEPTION_UNHANDLED)
782 ped_geometry_init (&gpt_disk_data->data_area, disk->dev,
783 first_usable, last_usable - first_usable + 1);
785 gpt_disk_data->entry_count
786 = PED_LE32_TO_CPU (gpt->NumberOfPartitionEntries);
787 PED_ASSERT (gpt_disk_data->entry_count > 0, return 0);
788 PED_ASSERT (gpt_disk_data->entry_count <= 8192, return 0);
790 gpt_disk_data->uuid = gpt->DiskGUID;
795 static PedPartition *
796 _parse_part_entry (PedDisk *disk, GuidPartitionEntry_t *pte)
799 GPTPartitionData *gpt_part_data;
802 part = ped_partition_new (disk, PED_PARTITION_NORMAL, NULL,
803 PED_LE64_TO_CPU (pte->StartingLBA),
804 PED_LE64_TO_CPU (pte->EndingLBA));
808 gpt_part_data = part->disk_specific;
809 gpt_part_data->type = pte->PartitionTypeGuid;
810 gpt_part_data->uuid = pte->UniquePartitionGuid;
811 for (i = 0; i < 72 / sizeof (efi_char16_t); i++)
812 gpt_part_data->name[i] =
813 (efi_char16_t) PED_LE16_TO_CPU ((uint16_t) pte->PartitionName[i]);
814 gpt_part_data->name[i] = 0;
816 gpt_part_data->lvm = gpt_part_data->raid
817 = gpt_part_data->boot = gpt_part_data->hp_service
818 = gpt_part_data->hidden = gpt_part_data->msftres
819 = gpt_part_data->bios_grub = 0;
821 if (pte->Attributes.RequiredToFunction & 0x1)
822 gpt_part_data->hidden = 1;
824 if (!guid_cmp (gpt_part_data->type, PARTITION_SYSTEM_GUID))
825 gpt_part_data->boot = 1;
826 else if (!guid_cmp (gpt_part_data->type, PARTITION_BIOS_GRUB_GUID))
827 gpt_part_data->bios_grub = 1;
828 else if (!guid_cmp (gpt_part_data->type, PARTITION_RAID_GUID))
829 gpt_part_data->raid = 1;
830 else if (!guid_cmp (gpt_part_data->type, PARTITION_LVM_GUID))
831 gpt_part_data->lvm = 1;
832 else if (!guid_cmp (gpt_part_data->type, PARTITION_HPSERVICE_GUID))
833 gpt_part_data->hp_service = 1;
834 else if (!guid_cmp (gpt_part_data->type, PARTITION_MSFT_RESERVED_GUID))
835 gpt_part_data->msftres = 1;
840 /* Read the primary GPT at sector 1 of DEV.
841 Verify its CRC and that of its partition entry array.
842 If they are valid, read the backup GPT specified by AlternateLBA.
843 If not, read the backup GPT in the last sector of the disk.
844 Return 1 if any read fails.
845 Upon successful verification of the primary GPT, set *PRIMARY_GPT, else NULL.
846 Upon successful verification of the backup GPT, set *BACKUP_GPT, else NULL.
847 If we've set *BACKUP_GPT to non-NULL, set *BACKUP_LBA to the sector
848 number in which it was found. */
850 gpt_read_headers (PedDisk const *disk,
851 GuidPartitionTableHeader_t **primary_gpt,
852 GuidPartitionTableHeader_t **backup_gpt,
853 PedSector *backup_sector_num_p)
857 PedDevice const *dev = disk->dev;
860 if (!ptt_read_sector (dev, 1, &s1))
863 GuidPartitionTableHeader_t *t = pth_new_from_raw (dev, s1);
867 GuidPartitionTableHeader_t *pri = t;
869 bool valid_primary = _header_is_valid (disk, pri, 1);
873 PedSector backup_sector_num =
875 ? PED_LE64_TO_CPU (pri->AlternateLBA)
879 if (!ptt_read_sector (dev, backup_sector_num, &s_bak))
881 t = pth_new_from_raw (dev, s_bak);
886 GuidPartitionTableHeader_t *bak = t;
887 if (_header_is_valid (disk, bak, backup_sector_num))
890 *backup_sector_num_p = backup_sector_num;
896 /************************************************************
897 * Intel is changing the EFI Spec. (after v1.02) to say that a
898 * disk is considered to have a GPT label only if the GPT
899 * structures are correct, and the MBR is actually a Protective
900 * MBR (has one 0xEE type partition).
901 * Problem occurs when a GPT-partitioned disk is then
902 * edited with a legacy (non-GPT-aware) application, such as
903 * fdisk (which doesn't generally erase the PGPT or AGPT).
904 * How should such a disk get handled? As a GPT disk (throwing
905 * away the fdisk changes), or as an MSDOS disk (throwing away
906 * the GPT information). Previously, I've taken the GPT-is-right,
907 * MBR is wrong, approach, to stay consistent with the EFI Spec.
908 * Intel disagrees, saying the disk should then be treated
909 * as having a msdos label, not a GPT label. If this is true,
910 * then what's the point of having an AGPT, since if the PGPT
911 * is screwed up, likely the PMBR is too, and the PMBR becomes
912 * a single point of failure.
913 * So, in the Linux kernel, I'm going to test for PMBR, and
914 * warn if it's not there, and treat the disk as MSDOS, with a note
915 * for users to use Parted to "fix up" their disk if they
916 * really want it to be considered GPT.
917 ************************************************************/
919 gpt_read (PedDisk *disk)
921 GPTDiskData *gpt_disk_data = disk->disk_specific;
923 #ifndef DISCOVER_ONLY
927 ped_disk_delete_all (disk);
929 /* motivation: let the user decide about the pmbr... during
930 ped_disk_probe(), they probably didn't get a choice... */
931 if (!gpt_probe (disk->dev))
934 GuidPartitionTableHeader_t *gpt = NULL;
935 GuidPartitionTableHeader_t *primary_gpt;
936 GuidPartitionTableHeader_t *backup_gpt;
937 PedSector backup_sector_num;
938 int read_failure = gpt_read_headers (disk, &primary_gpt, &backup_gpt,
942 /* This includes the case in which there used to be a GPT partition
943 table here, with an alternate LBA that extended beyond the current
944 end-of-device. It's treated as a non-match. */
946 /* Another possibility:
947 The primary header is ok, but backup is corrupt.
948 In the UEFI spec, this means the primary GUID table
949 is officially invalid. */
950 pth_free (backup_gpt);
951 pth_free (primary_gpt);
955 if (primary_gpt && backup_gpt)
957 /* Both are valid. */
958 if (PED_LE64_TO_CPU (primary_gpt->AlternateLBA) < disk->dev->length - 1)
960 #ifndef DISCOVER_ONLY
961 switch (ped_exception_throw
962 (PED_EXCEPTION_ERROR,
963 (PED_EXCEPTION_FIX | PED_EXCEPTION_CANCEL
964 | PED_EXCEPTION_IGNORE),
965 _("The backup GPT table is not at the end of the disk, as it "
966 "should be. This might mean that another operating system "
967 "believes the disk is smaller. Fix, by moving the backup "
968 "to the end (and removing the old backup)?")))
970 case PED_EXCEPTION_CANCEL:
972 case PED_EXCEPTION_FIX:
973 ptt_clear_sectors (disk->dev,
974 PED_LE64_TO_CPU (primary_gpt->AlternateLBA), 1);
980 #endif /* !DISCOVER_ONLY */
983 pth_free (backup_gpt);
985 else if (!primary_gpt && !backup_gpt)
987 /* Both are corrupt. */
988 ped_exception_throw (PED_EXCEPTION_ERROR, PED_EXCEPTION_CANCEL,
989 _("Both the primary and backup GPT tables "
990 "are corrupt. Try making a fresh table, "
991 "and using Parted's rescue feature to "
992 "recover partitions."));
995 else if (primary_gpt && !backup_gpt)
997 /* The primary header is ok, but backup is corrupt. */
998 if (ped_exception_throw
999 (PED_EXCEPTION_ERROR, PED_EXCEPTION_OK_CANCEL,
1000 _("The backup GPT table is corrupt, but the "
1001 "primary appears OK, so that will be used."))
1002 == PED_EXCEPTION_CANCEL)
1003 goto error_free_gpt;
1007 else /* !primary_gpt && backup_gpt */
1009 /* primary GPT corrupt, backup is ok. */
1010 if (ped_exception_throw
1011 (PED_EXCEPTION_ERROR, PED_EXCEPTION_OK_CANCEL,
1012 _("The primary GPT table is corrupt, but the "
1013 "backup appears OK, so that will be used."))
1014 == PED_EXCEPTION_CANCEL)
1015 goto error_free_gpt;
1022 if (!_parse_header (disk, gpt, &write_back))
1023 goto error_free_gpt;
1026 void *ptes = gpt_read_PE_array (disk, gpt, &ptes_bytes);
1028 goto error_free_gpt;
1030 uint32_t ptes_crc = efi_crc32 (ptes, ptes_bytes);
1031 if (ptes_crc != gpt->PartitionEntryArrayCRC32)
1034 (PED_EXCEPTION_ERROR,
1035 PED_EXCEPTION_CANCEL,
1036 _("primary partition table array CRC mismatch"));
1037 goto error_free_ptes;
1040 uint32_t p_ent_size = PED_LE32_TO_CPU (gpt->SizeOfPartitionEntry);
1041 for (i = 0; i < gpt_disk_data->entry_count; i++)
1043 GuidPartitionEntry_t *pte
1044 = (GuidPartitionEntry_t *) ((char *) ptes + i * p_ent_size);
1046 PedConstraint *constraint_exact;
1048 if (!guid_cmp (pte->PartitionTypeGuid, UNUSED_ENTRY_GUID))
1051 part = _parse_part_entry (disk, pte);
1053 goto error_delete_all;
1055 part->fs_type = ped_file_system_probe (&part->geom);
1058 constraint_exact = ped_constraint_exact (&part->geom);
1059 if (!ped_disk_add_partition (disk, part, constraint_exact))
1061 ped_partition_destroy (part);
1062 goto error_delete_all;
1064 ped_constraint_destroy (constraint_exact);
1068 #ifndef DISCOVER_ONLY
1070 ped_disk_commit_to_dev (disk);
1077 ped_disk_delete_all (disk);
1081 pth_free (primary_gpt);
1082 pth_free (backup_gpt);
1088 #ifndef DISCOVER_ONLY
1089 /* Write the protective MBR (to keep DOS happy) */
1091 _write_pmbr (PedDevice *dev)
1093 /* The UEFI spec is not clear about what to do with the following
1094 elements of the Protective MBR (pmbr): BootCode (0-440B),
1095 UniqueMBRSignature (440B-444B) and Unknown (444B-446B).
1096 With this in mind, we try not to modify these elements. */
1098 if (!ptt_read_sector (dev, 0, &s0))
1100 LegacyMBR_t *pmbr = s0;
1102 /* Zero out the legacy partitions. */
1103 memset (pmbr->PartitionRecord, 0, sizeof pmbr->PartitionRecord);
1105 pmbr->Signature = PED_CPU_TO_LE16 (MSDOS_MBR_SIGNATURE);
1106 pmbr->PartitionRecord[0].OSType = EFI_PMBR_OSTYPE_EFI;
1107 pmbr->PartitionRecord[0].StartSector = 1;
1108 pmbr->PartitionRecord[0].EndHead = 0xFE;
1109 pmbr->PartitionRecord[0].EndSector = 0xFF;
1110 pmbr->PartitionRecord[0].EndTrack = 0xFF;
1111 pmbr->PartitionRecord[0].StartingLBA = PED_CPU_TO_LE32 (1);
1112 if ((dev->length - 1ULL) > 0xFFFFFFFFULL)
1113 pmbr->PartitionRecord[0].SizeInLBA = PED_CPU_TO_LE32 (0xFFFFFFFF);
1115 pmbr->PartitionRecord[0].SizeInLBA = PED_CPU_TO_LE32 (dev->length - 1UL);
1117 int write_ok = ped_device_write (dev, pmbr, GPT_PMBR_LBA,
1124 _generate_header (const PedDisk *disk, int alternate, uint32_t ptes_crc,
1125 GuidPartitionTableHeader_t **gpt_p)
1127 GPTDiskData *gpt_disk_data = disk->disk_specific;
1128 GuidPartitionTableHeader_t *gpt;
1130 *gpt_p = pth_new_zeroed (disk->dev);
1134 gpt->Signature = PED_CPU_TO_LE64 (GPT_HEADER_SIGNATURE);
1135 gpt->Revision = PED_CPU_TO_LE32 (GPT_HEADER_REVISION_V1_00);
1138 gpt->HeaderSize = PED_CPU_TO_LE32 (pth_get_size_static (disk->dev));
1139 gpt->HeaderCRC32 = 0;
1144 PedSector ptes_size = gpt_disk_data->entry_count
1145 * sizeof (GuidPartitionEntry_t) / disk->dev->sector_size;
1147 gpt->MyLBA = PED_CPU_TO_LE64 (disk->dev->length - 1);
1148 gpt->AlternateLBA = PED_CPU_TO_LE64 (1);
1149 gpt->PartitionEntryLBA
1150 = PED_CPU_TO_LE64 (disk->dev->length - 1 - ptes_size);
1154 gpt->MyLBA = PED_CPU_TO_LE64 (1);
1155 gpt->AlternateLBA = PED_CPU_TO_LE64 (disk->dev->length - 1);
1156 gpt->PartitionEntryLBA = PED_CPU_TO_LE64 (2);
1159 gpt->FirstUsableLBA = PED_CPU_TO_LE64 (gpt_disk_data->data_area.start);
1160 gpt->LastUsableLBA = PED_CPU_TO_LE64 (gpt_disk_data->data_area.end);
1161 gpt->DiskGUID = gpt_disk_data->uuid;
1162 gpt->NumberOfPartitionEntries
1163 = PED_CPU_TO_LE32 (gpt_disk_data->entry_count);
1164 gpt->SizeOfPartitionEntry = PED_CPU_TO_LE32 (sizeof (GuidPartitionEntry_t));
1165 gpt->PartitionEntryArrayCRC32 = PED_CPU_TO_LE32 (ptes_crc);
1168 if (pth_crc32 (disk->dev, gpt, &crc) != 0)
1171 gpt->HeaderCRC32 = PED_CPU_TO_LE32 (crc);
1176 _partition_generate_part_entry (PedPartition *part, GuidPartitionEntry_t *pte)
1178 GPTPartitionData *gpt_part_data = part->disk_specific;
1181 PED_ASSERT (gpt_part_data != NULL, return);
1183 pte->PartitionTypeGuid = gpt_part_data->type;
1184 pte->UniquePartitionGuid = gpt_part_data->uuid;
1185 pte->StartingLBA = PED_CPU_TO_LE64 (part->geom.start);
1186 pte->EndingLBA = PED_CPU_TO_LE64 (part->geom.end);
1187 memset (&pte->Attributes, 0, sizeof (GuidPartitionEntryAttributes_t));
1189 if (gpt_part_data->hidden)
1190 pte->Attributes.RequiredToFunction = 1;
1192 for (i = 0; i < 72 / sizeof (efi_char16_t); i++)
1193 pte->PartitionName[i]
1194 = (efi_char16_t) PED_CPU_TO_LE16 ((uint16_t) gpt_part_data->name[i]);
1198 gpt_write (const PedDisk *disk)
1200 GPTDiskData *gpt_disk_data;
1201 GuidPartitionEntry_t *ptes;
1204 GuidPartitionTableHeader_t *gpt;
1208 PED_ASSERT (disk != NULL, goto error);
1209 PED_ASSERT (disk->dev != NULL, goto error);
1210 PED_ASSERT (disk->disk_specific != NULL, goto error);
1212 gpt_disk_data = disk->disk_specific;
1214 ptes_size = sizeof (GuidPartitionEntry_t) * gpt_disk_data->entry_count;
1215 ptes = (GuidPartitionEntry_t *) ped_malloc (ptes_size);
1218 memset (ptes, 0, ptes_size);
1219 for (part = ped_disk_next_partition (disk, NULL); part;
1220 part = ped_disk_next_partition (disk, part))
1222 if (part->type != 0)
1224 _partition_generate_part_entry (part, &ptes[part->num - 1]);
1227 ptes_crc = efi_crc32 (ptes, ptes_size);
1229 /* Write protective MBR */
1230 if (!_write_pmbr (disk->dev))
1231 goto error_free_ptes;
1233 /* Write PTH and PTEs */
1234 if (_generate_header (disk, 0, ptes_crc, &gpt) != 0)
1235 goto error_free_ptes;
1236 if ((pth_raw = pth_get_raw (disk->dev, gpt)) == NULL)
1237 goto error_free_ptes;
1239 bool write_ok = ped_device_write (disk->dev, pth_raw, 1, 1);
1242 goto error_free_ptes;
1243 if (!ped_device_write (disk->dev, ptes, 2,
1244 ptes_size / disk->dev->sector_size))
1245 goto error_free_ptes;
1247 /* Write Alternate PTH & PTEs */
1248 if (_generate_header (disk, 1, ptes_crc, &gpt) != 0)
1249 goto error_free_ptes;
1250 if ((pth_raw = pth_get_raw (disk->dev, gpt)) == NULL)
1251 goto error_free_ptes;
1253 write_ok = ped_device_write (disk->dev, pth_raw, disk->dev->length - 1, 1);
1256 goto error_free_ptes;
1257 if (!ped_device_write (disk->dev, ptes,
1258 disk->dev->length - 1 -
1259 ptes_size / disk->dev->sector_size,
1260 ptes_size / disk->dev->sector_size))
1261 goto error_free_ptes;
1264 return ped_device_sync (disk->dev);
1272 #endif /* !DISCOVER_ONLY */
1275 add_metadata_part (PedDisk *disk, PedSector start, PedSector length)
1278 PedConstraint *constraint_exact;
1279 PED_ASSERT (disk != NULL, return 0);
1281 part = ped_partition_new (disk, PED_PARTITION_METADATA, NULL,
1282 start, start + length - 1);
1286 constraint_exact = ped_constraint_exact (&part->geom);
1287 if (!ped_disk_add_partition (disk, part, constraint_exact))
1288 goto error_destroy_constraint;
1289 ped_constraint_destroy (constraint_exact);
1292 error_destroy_constraint:
1293 ped_constraint_destroy (constraint_exact);
1294 ped_partition_destroy (part);
1299 static PedPartition *
1300 gpt_partition_new (const PedDisk *disk,
1301 PedPartitionType part_type,
1302 const PedFileSystemType *fs_type, PedSector start,
1306 GPTPartitionData *gpt_part_data;
1308 part = _ped_partition_alloc (disk, part_type, fs_type, start, end);
1315 gpt_part_data = part->disk_specific =
1316 ped_malloc (sizeof (GPTPartitionData));
1318 goto error_free_part;
1320 gpt_part_data->type = PARTITION_BASIC_DATA_GUID;
1321 gpt_part_data->lvm = 0;
1322 gpt_part_data->raid = 0;
1323 gpt_part_data->boot = 0;
1324 gpt_part_data->bios_grub = 0;
1325 gpt_part_data->hp_service = 0;
1326 gpt_part_data->hidden = 0;
1327 gpt_part_data->msftres = 0;
1328 uuid_generate ((unsigned char *) &gpt_part_data->uuid);
1329 swap_uuid_and_efi_guid ((unsigned char *) (&gpt_part_data->uuid));
1330 memset (gpt_part_data->name, 0, sizeof gpt_part_data->name);
1334 _ped_partition_free (part);
1339 static PedPartition *
1340 gpt_partition_duplicate (const PedPartition *part)
1342 PedPartition *result;
1343 GPTPartitionData *part_data = part->disk_specific;
1344 GPTPartitionData *result_data;
1346 result = _ped_partition_alloc (part->disk, part->type, part->fs_type,
1347 part->geom.start, part->geom.end);
1350 result->num = part->num;
1352 if (result->type != 0)
1355 result_data = result->disk_specific =
1356 ped_malloc (sizeof (GPTPartitionData));
1358 goto error_free_part;
1360 result_data->type = part_data->type;
1361 result_data->uuid = part_data->uuid;
1362 strcpy (result_data->name, part_data->name);
1366 _ped_partition_free (result);
1372 gpt_partition_destroy (PedPartition *part)
1374 if (part->type == 0)
1376 PED_ASSERT (part->disk_specific != NULL, return);
1377 free (part->disk_specific);
1380 _ped_partition_free (part);
1384 gpt_partition_set_system (PedPartition *part,
1385 const PedFileSystemType *fs_type)
1387 GPTPartitionData *gpt_part_data = part->disk_specific;
1389 PED_ASSERT (gpt_part_data != NULL, return 0);
1391 part->fs_type = fs_type;
1393 if (gpt_part_data->lvm)
1395 gpt_part_data->type = PARTITION_LVM_GUID;
1398 if (gpt_part_data->raid)
1400 gpt_part_data->type = PARTITION_RAID_GUID;
1403 if (gpt_part_data->boot)
1405 gpt_part_data->type = PARTITION_SYSTEM_GUID;
1408 if (gpt_part_data->bios_grub)
1410 gpt_part_data->type = PARTITION_BIOS_GRUB_GUID;
1413 if (gpt_part_data->hp_service)
1415 gpt_part_data->type = PARTITION_HPSERVICE_GUID;
1418 if (gpt_part_data->msftres)
1420 gpt_part_data->type = PARTITION_MSFT_RESERVED_GUID;
1426 if (strncmp (fs_type->name, "fat", 3) == 0
1427 || strcmp (fs_type->name, "ntfs") == 0)
1429 gpt_part_data->type = PARTITION_BASIC_DATA_GUID;
1432 if (strncmp (fs_type->name, "hfs", 3) == 0)
1434 gpt_part_data->type = PARTITION_APPLE_HFS_GUID;
1437 if (strstr (fs_type->name, "swap"))
1439 gpt_part_data->type = PARTITION_SWAP_GUID;
1444 gpt_part_data->type = PARTITION_BASIC_DATA_GUID;
1448 /* Allocate metadata partitions for the GPTH and PTES */
1450 gpt_alloc_metadata (PedDisk *disk)
1452 PedSector gptlength, pteslength = 0;
1453 GPTDiskData *gpt_disk_data;
1455 PED_ASSERT (disk != NULL, return 0);
1456 PED_ASSERT (disk->dev != NULL, return 0);
1457 PED_ASSERT (disk->disk_specific != NULL, return 0);
1458 gpt_disk_data = disk->disk_specific;
1460 gptlength = ped_div_round_up (sizeof (GuidPartitionTableHeader_t),
1461 disk->dev->sector_size);
1462 pteslength = ped_div_round_up (gpt_disk_data->entry_count
1463 * sizeof (GuidPartitionEntry_t),
1464 disk->dev->sector_size);
1466 /* metadata at the start of the disk includes the MBR */
1467 if (!add_metadata_part (disk, GPT_PMBR_LBA,
1468 GPT_PMBR_SECTORS + gptlength + pteslength))
1471 /* metadata at the end of the disk */
1472 if (!add_metadata_part (disk, disk->dev->length - gptlength - pteslength,
1473 gptlength + pteslength))
1479 /* Does nothing, as the read/new/destroy functions maintain part->num */
1481 gpt_partition_enumerate (PedPartition *part)
1483 GPTDiskData *gpt_disk_data = part->disk->disk_specific;
1486 /* never change the partition numbers */
1487 if (part->num != -1)
1490 for (i = 1; i <= gpt_disk_data->entry_count; i++)
1492 if (!ped_disk_get_partition (part->disk, i))
1499 PED_ASSERT (0, return 0);
1501 return 0; /* used if debug is disabled */
1505 gpt_partition_set_flag (PedPartition *part, PedPartitionFlag flag, int state)
1507 GPTPartitionData *gpt_part_data;
1508 PED_ASSERT (part != NULL, return 0);
1509 PED_ASSERT (part->disk_specific != NULL, return 0);
1510 gpt_part_data = part->disk_specific;
1514 case PED_PARTITION_BOOT:
1515 gpt_part_data->boot = state;
1518 = gpt_part_data->lvm
1519 = gpt_part_data->bios_grub
1520 = gpt_part_data->hp_service = gpt_part_data->msftres = 0;
1521 return gpt_partition_set_system (part, part->fs_type);
1522 case PED_PARTITION_BIOS_GRUB:
1523 gpt_part_data->bios_grub = state;
1526 = gpt_part_data->lvm
1527 = gpt_part_data->boot
1528 = gpt_part_data->hp_service = gpt_part_data->msftres = 0;
1529 return gpt_partition_set_system (part, part->fs_type);
1530 case PED_PARTITION_RAID:
1531 gpt_part_data->raid = state;
1534 = gpt_part_data->lvm
1535 = gpt_part_data->bios_grub
1536 = gpt_part_data->hp_service = gpt_part_data->msftres = 0;
1537 return gpt_partition_set_system (part, part->fs_type);
1538 case PED_PARTITION_LVM:
1539 gpt_part_data->lvm = state;
1542 = gpt_part_data->raid
1543 = gpt_part_data->bios_grub
1544 = gpt_part_data->hp_service = gpt_part_data->msftres = 0;
1545 return gpt_partition_set_system (part, part->fs_type);
1546 case PED_PARTITION_HPSERVICE:
1547 gpt_part_data->hp_service = state;
1550 = gpt_part_data->raid
1551 = gpt_part_data->lvm
1552 = gpt_part_data->bios_grub = gpt_part_data->msftres = 0;
1553 return gpt_partition_set_system (part, part->fs_type);
1554 case PED_PARTITION_MSFT_RESERVED:
1555 gpt_part_data->msftres = state;
1558 = gpt_part_data->raid
1559 = gpt_part_data->lvm
1560 = gpt_part_data->bios_grub = gpt_part_data->hp_service = 0;
1561 return gpt_partition_set_system (part, part->fs_type);
1562 case PED_PARTITION_HIDDEN:
1563 gpt_part_data->hidden = state;
1565 case PED_PARTITION_SWAP:
1566 case PED_PARTITION_ROOT:
1567 case PED_PARTITION_LBA:
1575 gpt_partition_get_flag (const PedPartition *part, PedPartitionFlag flag)
1577 GPTPartitionData *gpt_part_data;
1578 PED_ASSERT (part->disk_specific != NULL, return 0);
1579 gpt_part_data = part->disk_specific;
1583 case PED_PARTITION_RAID:
1584 return gpt_part_data->raid;
1585 case PED_PARTITION_LVM:
1586 return gpt_part_data->lvm;
1587 case PED_PARTITION_BOOT:
1588 return gpt_part_data->boot;
1589 case PED_PARTITION_BIOS_GRUB:
1590 return gpt_part_data->bios_grub;
1591 case PED_PARTITION_HPSERVICE:
1592 return gpt_part_data->hp_service;
1593 case PED_PARTITION_MSFT_RESERVED:
1594 return gpt_part_data->msftres;
1595 case PED_PARTITION_HIDDEN:
1596 return gpt_part_data->hidden;
1597 case PED_PARTITION_SWAP:
1598 case PED_PARTITION_LBA:
1599 case PED_PARTITION_ROOT:
1607 gpt_partition_is_flag_available (const PedPartition *part,
1608 PedPartitionFlag flag)
1612 case PED_PARTITION_RAID:
1613 case PED_PARTITION_LVM:
1614 case PED_PARTITION_BOOT:
1615 case PED_PARTITION_BIOS_GRUB:
1616 case PED_PARTITION_HPSERVICE:
1617 case PED_PARTITION_MSFT_RESERVED:
1618 case PED_PARTITION_HIDDEN:
1620 case PED_PARTITION_SWAP:
1621 case PED_PARTITION_ROOT:
1622 case PED_PARTITION_LBA:
1630 gpt_partition_set_name (PedPartition *part, const char *name)
1632 GPTPartitionData *gpt_part_data = part->disk_specific;
1634 strncpy (gpt_part_data->name, name, 36);
1635 gpt_part_data->name[36] = 0;
1639 gpt_partition_get_name (const PedPartition *part)
1641 GPTPartitionData *gpt_part_data = part->disk_specific;
1642 return gpt_part_data->name;
1646 gpt_get_max_primary_partition_count (const PedDisk *disk)
1648 const GPTDiskData *gpt_disk_data = disk->disk_specific;
1649 return gpt_disk_data->entry_count;
1653 * From (http://developer.apple.com/technotes/tn2006/tn2166.html Chapter 5).
1654 * According to the specs the first LBA (LBA0) is not relevant (it exists
1655 * to maintain compatibility). on the second LBA(LBA1) gpt places the
1656 * header. The header is as big as the block size. After the header we
1657 * find the Entry array. Each element of said array, describes each
1658 * partition. One can have as much elements as can fit between the end of
1659 * the second LBA (where the header ends) and the FirstUsableLBA.
1660 * FirstUsableLBA is the first logical block that is used for contents
1661 * and is defined in header.
1663 * /---------------------------------------------------\
1664 * | BLOCK0 | HEADER | Entry Array | First Usable LBA |
1666 * \---------------------------------------------------/
1668 * /----------/ \----------\
1669 * /-----------------------------------------\
1670 * | E1 | E2 | E3 |...............| EN |
1671 * \-----------------------------------------/
1673 * The number of possible partitions or supported partitions is:
1674 * SP = FirstUsableLBA*Blocksize - 2*Blocksize / SizeOfPartitionEntry
1675 * SP = Blocksize(FirstusableLBA - 2) / SizeOfPartitoinEntry
1678 gpt_get_max_supported_partition_count (const PedDisk *disk, int *max_n)
1680 GuidPartitionTableHeader_t *pth = NULL;
1681 uint8_t *pth_raw = ped_malloc (pth_get_size (disk->dev));
1683 if (ped_device_read (disk->dev, pth_raw, 1, GPT_HEADER_SECTORS)
1684 || ped_device_read (disk->dev, pth_raw,
1685 disk->dev->length, GPT_HEADER_SECTORS))
1686 pth = pth_new_from_raw (disk->dev, pth_raw);
1692 *max_n = (disk->dev->sector_size * (pth->FirstUsableLBA - 2)
1693 / PED_LE32_TO_CPU (pth->SizeOfPartitionEntry));
1698 static PedConstraint *
1699 _non_metadata_constraint (const PedDisk *disk)
1701 GPTDiskData *gpt_disk_data = disk->disk_specific;
1703 return ped_constraint_new_from_max (&gpt_disk_data->data_area);
1707 gpt_partition_align (PedPartition *part, const PedConstraint *constraint)
1709 PED_ASSERT (part != NULL, return 0);
1711 if (_ped_partition_attempt_align (part, constraint,
1712 _non_metadata_constraint (part->disk)))
1715 #ifndef DISCOVER_ONLY
1716 ped_exception_throw (PED_EXCEPTION_ERROR,
1717 PED_EXCEPTION_CANCEL,
1718 _("Unable to satisfy all constraints on the partition."));
1724 gpt_partition_check (const PedPartition *part)
1729 #ifdef DISCOVER_ONLY
1730 # define NULL_IF_DISCOVER_ONLY(val) NULL
1732 # define NULL_IF_DISCOVER_ONLY(val) val
1735 static PedDiskOps gpt_disk_ops =
1738 clobber: NULL_IF_DISCOVER_ONLY (gpt_clobber),
1740 duplicate: gpt_duplicate,
1743 write: NULL_IF_DISCOVER_ONLY (gpt_write),
1744 partition_new: gpt_partition_new,
1745 partition_duplicate: gpt_partition_duplicate,
1746 partition_destroy: gpt_partition_destroy,
1747 partition_set_system: gpt_partition_set_system,
1748 partition_set_flag: gpt_partition_set_flag,
1749 partition_get_flag: gpt_partition_get_flag,
1750 partition_is_flag_available: gpt_partition_is_flag_available,
1751 partition_set_name: gpt_partition_set_name,
1752 partition_get_name: gpt_partition_get_name,
1753 partition_align: gpt_partition_align,
1754 partition_enumerate: gpt_partition_enumerate,
1755 partition_check: gpt_partition_check,
1756 alloc_metadata: gpt_alloc_metadata,
1757 get_max_primary_partition_count: gpt_get_max_primary_partition_count,
1758 get_max_supported_partition_count: gpt_get_max_supported_partition_count
1761 static PedDiskType gpt_disk_type =
1766 features: PED_DISK_TYPE_PARTITION_NAME
1770 ped_disk_gpt_init ()
1772 PED_ASSERT (sizeof (GuidPartitionEntryAttributes_t) == 8, return);
1773 PED_ASSERT (sizeof (GuidPartitionEntry_t) == 128, return);
1775 ped_disk_type_register (&gpt_disk_type);
1779 ped_disk_gpt_done ()
1781 ped_disk_type_unregister (&gpt_disk_type);