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[thirdparty/util-linux.git] / libfdisk / src / gpt.c
1 /*
2 * Copyright (C) 2007 Karel Zak <kzak@redhat.com>
3 * Copyright (C) 2012 Davidlohr Bueso <dave@gnu.org>
4 *
5 * GUID Partition Table (GPT) support. Based on UEFI Specs 2.3.1
6 * Chapter 5: GUID Partition Table (GPT) Disk Layout (Jun 27th, 2012).
7 * Some ideas and inspiration from GNU parted and gptfdisk.
8 */
9 #include <stdio.h>
10 #include <string.h>
11 #include <stdlib.h>
12 #include <inttypes.h>
13 #include <sys/stat.h>
14 #include <sys/utsname.h>
15 #include <sys/types.h>
16 #include <fcntl.h>
17 #include <unistd.h>
18 #include <errno.h>
19 #include <ctype.h>
20 #include <uuid.h>
21
22 #include "fdiskP.h"
23
24 #include "nls.h"
25 #include "crc32.h"
26 #include "blkdev.h"
27 #include "bitops.h"
28 #include "strutils.h"
29 #include "all-io.h"
30
31 #define GPT_HEADER_SIGNATURE 0x5452415020494645LL /* EFI PART */
32 #define GPT_HEADER_REVISION_V1_02 0x00010200
33 #define GPT_HEADER_REVISION_V1_00 0x00010000
34 #define GPT_HEADER_REVISION_V0_99 0x00009900
35 #define GPT_HEADER_MINSZ 92 /* bytes */
36
37 #define GPT_PMBR_LBA 0
38 #define GPT_MBR_PROTECTIVE 1
39 #define GPT_MBR_HYBRID 2
40
41 #define GPT_PRIMARY_PARTITION_TABLE_LBA 0x00000001
42
43 #define EFI_PMBR_OSTYPE 0xEE
44 #define MSDOS_MBR_SIGNATURE 0xAA55
45 #define GPT_PART_NAME_LEN 72 / sizeof(uint16_t)
46 #define GPT_NPARTITIONS 128
47
48 /* Globally unique identifier */
49 struct gpt_guid {
50 uint32_t time_low;
51 uint16_t time_mid;
52 uint16_t time_hi_and_version;
53 uint8_t clock_seq_hi;
54 uint8_t clock_seq_low;
55 uint8_t node[6];
56 };
57
58
59 /* only checking that the GUID is 0 is enough to verify an empty partition. */
60 #define GPT_UNUSED_ENTRY_GUID \
61 ((struct gpt_guid) { 0x00000000, 0x0000, 0x0000, 0x00, 0x00, \
62 { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }})
63
64 /* Linux native partition type */
65 #define GPT_DEFAULT_ENTRY_TYPE "0FC63DAF-8483-4772-8E79-3D69D8477DE4"
66
67 /*
68 * Attribute bits
69 */
70 struct gpt_attr {
71 uint64_t required_to_function:1;
72 uint64_t no_blockio_protocol:1;
73 uint64_t legacy_bios_bootable:1;
74 uint64_t reserved:45;
75 uint64_t guid_secific:16;
76 } __attribute__ ((packed));
77
78 /* The GPT Partition entry array contains an array of GPT entries. */
79 struct gpt_entry {
80 struct gpt_guid type; /* purpose and type of the partition */
81 struct gpt_guid partition_guid;
82 uint64_t lba_start;
83 uint64_t lba_end;
84 struct gpt_attr attr;
85 uint16_t name[GPT_PART_NAME_LEN];
86 } __attribute__ ((packed));
87
88 /* GPT header */
89 struct gpt_header {
90 uint64_t signature; /* header identification */
91 uint32_t revision; /* header version */
92 uint32_t size; /* in bytes */
93 uint32_t crc32; /* header CRC checksum */
94 uint32_t reserved1; /* must be 0 */
95 uint64_t my_lba; /* LBA that contains this struct (LBA 1) */
96 uint64_t alternative_lba; /* backup GPT header */
97 uint64_t first_usable_lba; /* first usable logical block for partitions */
98 uint64_t last_usable_lba; /* last usable logical block for partitions */
99 struct gpt_guid disk_guid; /* unique disk identifier */
100 uint64_t partition_entry_lba; /* stat LBA of the partition entry array */
101 uint32_t npartition_entries; /* total partition entries - normally 128 */
102 uint32_t sizeof_partition_entry; /* bytes for each GUID pt */
103 uint32_t partition_entry_array_crc32; /* partition CRC checksum */
104 uint8_t reserved2[512 - 92]; /* must be 0 */
105 } __attribute__ ((packed));
106
107 struct gpt_record {
108 uint8_t boot_indicator; /* unused by EFI, set to 0x80 for bootable */
109 uint8_t start_head; /* unused by EFI, pt start in CHS */
110 uint8_t start_sector; /* unused by EFI, pt start in CHS */
111 uint8_t start_track;
112 uint8_t os_type; /* EFI and legacy non-EFI OS types */
113 uint8_t end_head; /* unused by EFI, pt end in CHS */
114 uint8_t end_sector; /* unused by EFI, pt end in CHS */
115 uint8_t end_track; /* unused by EFI, pt end in CHS */
116 uint32_t starting_lba; /* used by EFI - start addr of the on disk pt */
117 uint32_t size_in_lba; /* used by EFI - size of pt in LBA */
118 } __attribute__ ((packed));
119
120 /* Protected MBR and legacy MBR share same structure */
121 struct gpt_legacy_mbr {
122 uint8_t boot_code[440];
123 uint32_t unique_mbr_signature;
124 uint16_t unknown;
125 struct gpt_record partition_record[4];
126 uint16_t signature;
127 } __attribute__ ((packed));
128
129 /*
130 * Here be dragons!
131 * See: http://en.wikipedia.org/wiki/GUID_Partition_Table#Partition_type_GUIDs
132 */
133 #define DEF_GUID(_u, _n) \
134 { \
135 .typestr = (_u), \
136 .name = (_n), \
137 }
138
139 static struct fdisk_parttype gpt_parttypes[] =
140 {
141 /* Generic OS */
142 DEF_GUID("C12A7328-F81F-11D2-BA4B-00A0C93EC93B", N_("EFI System")),
143
144 DEF_GUID("024DEE41-33E7-11D3-9D69-0008C781F39F", N_("MBR partition scheme")),
145 /* Hah!IdontneedEFI */
146 DEF_GUID("21686148-6449-6E6F-744E-656564454649", N_("BIOS boot partition")),
147
148 /* Windows */
149 DEF_GUID("E3C9E316-0B5C-4DB8-817D-F92DF00215AE", N_("Microsoft reserved")),
150 DEF_GUID("EBD0A0A2-B9E5-4433-87C0-68B6B72699C7", N_("Microsoft basic data")),
151 DEF_GUID("5808C8AA-7E8F-42E0-85D2-E1E90434CFB3", N_("Microsoft LDM metadata")),
152 DEF_GUID("AF9B60A0-1431-4F62-BC68-3311714A69AD", N_("Microsoft LDM data")),
153 DEF_GUID("DE94BBA4-06D1-4D40-A16A-BFD50179D6AC", N_("Windows recovery environment")),
154 DEF_GUID("37AFFC90-EF7D-4E96-91C3-2D7AE055B174", N_("IBM General Parallel Fs")),
155
156 /* HP-UX */
157 DEF_GUID("75894C1E-3AEB-11D3-B7C1-7B03A0000000", N_("HP-UX data partition")),
158 DEF_GUID("E2A1E728-32E3-11D6-A682-7B03A0000000", N_("HP-UX service partition")),
159
160 /* Linux */
161 DEF_GUID("0FC63DAF-8483-4772-8E79-3D69D8477DE4", N_("Linux filesystem")),
162 DEF_GUID("A19D880F-05FC-4D3B-A006-743F0F84911E", N_("Linux RAID")),
163 DEF_GUID("0657FD6D-A4AB-43C4-84E5-0933C84B4F4F", N_("Linux swap")),
164 DEF_GUID("E6D6D379-F507-44C2-A23C-238F2A3DF928", N_("Linux LVM")),
165 DEF_GUID("8DA63339-0007-60C0-C436-083AC8230908", N_("Linux reserved")),
166
167 /* FreeBSD */
168 DEF_GUID("516E7CB4-6ECF-11D6-8FF8-00022D09712B", N_("FreeBSD data")),
169 DEF_GUID("83BD6B9D-7F41-11DC-BE0B-001560B84F0F", N_("FreeBSD boot")),
170 DEF_GUID("516E7CB5-6ECF-11D6-8FF8-00022D09712B", N_("FreeBSD swap")),
171 DEF_GUID("516E7CB6-6ECF-11D6-8FF8-00022D09712B", N_("FreeBSD UFS")),
172 DEF_GUID("516E7CBA-6ECF-11D6-8FF8-00022D09712B", N_("FreeBSD ZFS")),
173 DEF_GUID("516E7CB8-6ECF-11D6-8FF8-00022D09712B", N_("FreeBSD Vinum")),
174
175 /* Apple OSX */
176 DEF_GUID("48465300-0000-11AA-AA11-00306543ECAC", N_("Apple HFS/HFS+")),
177 DEF_GUID("55465300-0000-11AA-AA11-00306543ECAC", N_("Apple UFS")),
178 DEF_GUID("52414944-0000-11AA-AA11-00306543ECAC", N_("Apple RAID")),
179 DEF_GUID("52414944-5F4F-11AA-AA11-00306543ECAC", N_("Apple RAID offline")),
180 DEF_GUID("426F6F74-0000-11AA-AA11-00306543ECAC", N_("Apple boot")),
181 DEF_GUID("4C616265-6C00-11AA-AA11-00306543ECAC", N_("Apple label")),
182 DEF_GUID("5265636F-7665-11AA-AA11-00306543ECAC", N_("Apple TV recovery")),
183 DEF_GUID("53746F72-6167-11AA-AA11-00306543ECAC", N_("Apple Core storage")),
184
185 /* Solaris */
186 DEF_GUID("6A82CB45-1DD2-11B2-99A6-080020736631", N_("Solaris boot")),
187 DEF_GUID("6A85CF4D-1DD2-11B2-99A6-080020736631", N_("Solaris root")),
188 /* same as Apple ZFS */
189 DEF_GUID("6A898CC3-1DD2-11B2-99A6-080020736631", N_("Solaris /usr & Apple ZFS")),
190 DEF_GUID("6A87C46F-1DD2-11B2-99A6-080020736631", N_("Solaris swap")),
191 DEF_GUID("6A8B642B-1DD2-11B2-99A6-080020736631", N_("Solaris backup")),
192 DEF_GUID("6A8EF2E9-1DD2-11B2-99A6-080020736631", N_("Solaris /var")),
193 DEF_GUID("6A90BA39-1DD2-11B2-99A6-080020736631", N_("Solaris /home")),
194 DEF_GUID("6A9283A5-1DD2-11B2-99A6-080020736631", N_("Solaris alternate sector")),
195 DEF_GUID("6A945A3B-1DD2-11B2-99A6-080020736631", N_("Solaris reserved 1")),
196 DEF_GUID("6A9630D1-1DD2-11B2-99A6-080020736631", N_("Solaris reserved 2")),
197 DEF_GUID("6A980767-1DD2-11B2-99A6-080020736631", N_("Solaris reserved 3")),
198 DEF_GUID("6A96237F-1DD2-11B2-99A6-080020736631", N_("Solaris reserved 4")),
199 DEF_GUID("6A8D2AC7-1DD2-11B2-99A6-080020736631", N_("Solaris reserved 5")),
200
201 /* NetBSD */
202 DEF_GUID("49F48D32-B10E-11DC-B99B-0019D1879648", N_("NetBSD swap")),
203 DEF_GUID("49F48D5A-B10E-11DC-B99B-0019D1879648", N_("NetBSD FFS")),
204 DEF_GUID("49F48D82-B10E-11DC-B99B-0019D1879648", N_("NetBSD LFS")),
205 DEF_GUID("2DB519C4-B10E-11DC-B99B-0019D1879648", N_("NetBSD concatenated")),
206 DEF_GUID("2DB519EC-B10E-11DC-B99B-0019D1879648", N_("NetBSD encrypted")),
207 DEF_GUID("49F48DAA-B10E-11DC-B99B-0019D1879648", N_("NetBSD RAID")),
208
209 /* ChromeOS */
210 DEF_GUID("FE3A2A5D-4F32-41A7-B725-ACCC3285A309", N_("ChromeOS kernel")),
211 DEF_GUID("3CB8E202-3B7E-47DD-8A3C-7FF2A13CFCEC", N_("ChromeOS root fs")),
212 DEF_GUID("2E0A753D-9E48-43B0-8337-B15192CB1B5E", N_("ChromeOS reserved")),
213
214 /* MidnightBSD */
215 DEF_GUID("85D5E45A-237C-11E1-B4B3-E89A8F7FC3A7", N_("MidnightBSD data")),
216 DEF_GUID("85D5E45E-237C-11E1-B4B3-E89A8F7FC3A7", N_("MidnightBSD boot")),
217 DEF_GUID("85D5E45B-237C-11E1-B4B3-E89A8F7FC3A7", N_("MidnightBSD swap")),
218 DEF_GUID("0394Ef8B-237C-11E1-B4B3-E89A8F7FC3A7", N_("MidnightBSD UFS")),
219 DEF_GUID("85D5E45D-237C-11E1-B4B3-E89A8F7FC3A7", N_("MidnightBSD ZFS")),
220 DEF_GUID("85D5E45C-237C-11E1-B4B3-E89A8F7FC3A7", N_("MidnightBSD Vinum")),
221 };
222
223 /* gpt_entry macros */
224 #define gpt_partition_start(_e) le64_to_cpu((_e)->lba_start)
225 #define gpt_partition_end(_e) le64_to_cpu((_e)->lba_end)
226
227 /*
228 * in-memory fdisk GPT stuff
229 */
230 struct fdisk_gpt_label {
231 struct fdisk_label head; /* generic part */
232
233 /* gpt specific part */
234 struct gpt_header *pheader; /* primary header */
235 struct gpt_header *bheader; /* backup header */
236 struct gpt_entry *ents; /* entries (partitions) */
237 };
238
239 static void gpt_deinit(struct fdisk_label *lb);
240 static struct fdisk_parttype *gpt_get_partition_type(struct fdisk_context *cxt, size_t i);
241
242 static inline struct fdisk_gpt_label *self_label(struct fdisk_context *cxt)
243 {
244 return (struct fdisk_gpt_label *) cxt->label;
245 }
246
247 /*
248 * Returns the partition length, or 0 if end is before beginning.
249 */
250 static uint64_t gpt_partition_size(const struct gpt_entry *e)
251 {
252 uint64_t start = gpt_partition_start(e);
253 uint64_t end = gpt_partition_end(e);
254
255 return start > end ? 0 : end - start + 1ULL;
256 }
257
258 #ifdef CONFIG_LIBFDISK_DEBUG
259 /* prints UUID in the real byte order! */
260 static void dbgprint_uuid(const char *mesg, struct gpt_guid *guid)
261 {
262 const unsigned char *uuid = (unsigned char *) guid;
263
264 fprintf(stderr, "%s: "
265 "%02x%02x%02x%02x-%02x%02x-%02x%02x-%02x%02x-%02x%02x%02x%02x%02x%02x\n",
266 mesg,
267 uuid[0], uuid[1], uuid[2], uuid[3],
268 uuid[4], uuid[5],
269 uuid[6], uuid[7],
270 uuid[8], uuid[9],
271 uuid[10], uuid[11], uuid[12], uuid[13], uuid[14],uuid[15]);
272 }
273 #endif
274
275 /*
276 * UUID is traditionally 16 byte big-endian array, except Intel EFI
277 * specification where the UUID is a structure of little-endian fields.
278 */
279 static void swap_efi_guid(struct gpt_guid *uid)
280 {
281 uid->time_low = swab32(uid->time_low);
282 uid->time_mid = swab16(uid->time_mid);
283 uid->time_hi_and_version = swab16(uid->time_hi_and_version);
284 }
285
286 static int string_to_guid(const char *in, struct gpt_guid *guid)
287 {
288 if (uuid_parse(in, (unsigned char *) guid)) /* BE */
289 return -1;
290 swap_efi_guid(guid); /* LE */
291 return 0;
292 }
293
294 static char *guid_to_string(struct gpt_guid *guid, char *out)
295 {
296 struct gpt_guid u = *guid; /* LE */
297
298 swap_efi_guid(&u); /* BE */
299 uuid_unparse_upper((unsigned char *) &u, out);
300
301 return out;
302 }
303
304 static const char *gpt_get_header_revstr(struct gpt_header *header)
305 {
306 if (!header)
307 goto unknown;
308
309 switch (header->revision) {
310 case GPT_HEADER_REVISION_V1_02:
311 return "1.2";
312 case GPT_HEADER_REVISION_V1_00:
313 return "1.0";
314 case GPT_HEADER_REVISION_V0_99:
315 return "0.99";
316 default:
317 goto unknown;
318 }
319
320 unknown:
321 return "unknown";
322 }
323
324 static inline int partition_unused(const struct gpt_entry *e)
325 {
326 return !memcmp(&e->type, &GPT_UNUSED_ENTRY_GUID,
327 sizeof(struct gpt_guid));
328 }
329
330 /*
331 * Builds a clean new valid protective MBR - will wipe out any existing data.
332 * Returns 0 on success, otherwise < 0 on error.
333 */
334 static int gpt_mknew_pmbr(struct fdisk_context *cxt)
335 {
336 struct gpt_legacy_mbr *pmbr = NULL;
337
338 if (!cxt || !cxt->firstsector)
339 return -ENOSYS;
340
341 fdisk_zeroize_firstsector(cxt);
342
343 pmbr = (struct gpt_legacy_mbr *) cxt->firstsector;
344
345 pmbr->signature = cpu_to_le16(MSDOS_MBR_SIGNATURE);
346 pmbr->partition_record[0].os_type = EFI_PMBR_OSTYPE;
347 pmbr->partition_record[0].start_sector = 1;
348 pmbr->partition_record[0].end_head = 0xFE;
349 pmbr->partition_record[0].end_sector = 0xFF;
350 pmbr->partition_record[0].end_track = 0xFF;
351 pmbr->partition_record[0].starting_lba = cpu_to_le32(1);
352 pmbr->partition_record[0].size_in_lba =
353 cpu_to_le32(min((uint32_t) cxt->total_sectors - 1, 0xFFFFFFFF));
354
355 return 0;
356 }
357
358 /* some universal differences between the headers */
359 static void gpt_mknew_header_common(struct fdisk_context *cxt,
360 struct gpt_header *header, uint64_t lba)
361 {
362 if (!cxt || !header)
363 return;
364
365 header->my_lba = cpu_to_le64(lba);
366
367 if (lba == GPT_PRIMARY_PARTITION_TABLE_LBA) { /* primary */
368 header->alternative_lba = cpu_to_le64(cxt->total_sectors - 1);
369 header->partition_entry_lba = cpu_to_le64(2);
370 } else { /* backup */
371 uint64_t esz = le32_to_cpu(header->npartition_entries) * sizeof(struct gpt_entry);
372 uint64_t esects = (esz + cxt->sector_size - 1) / cxt->sector_size;
373
374 header->alternative_lba = cpu_to_le64(GPT_PRIMARY_PARTITION_TABLE_LBA);
375 header->partition_entry_lba = cpu_to_le64(cxt->total_sectors - 1 - esects);
376 }
377 }
378
379 /*
380 * Builds a new GPT header (at sector lba) from a backup header2.
381 * If building a primary header, then backup is the secondary, and vice versa.
382 *
383 * Always pass a new (zeroized) header to build upon as we don't
384 * explicitly zero-set some values such as CRCs and reserved.
385 *
386 * Returns 0 on success, otherwise < 0 on error.
387 */
388 static int gpt_mknew_header_from_bkp(struct fdisk_context *cxt,
389 struct gpt_header *header,
390 uint64_t lba,
391 struct gpt_header *header2)
392 {
393 if (!cxt || !header || !header2)
394 return -ENOSYS;
395
396 header->signature = header2->signature;
397 header->revision = header2->revision;
398 header->size = header2->size;
399 header->npartition_entries = header2->npartition_entries;
400 header->sizeof_partition_entry = header2->sizeof_partition_entry;
401 header->first_usable_lba = header2->first_usable_lba;
402 header->last_usable_lba = header2->last_usable_lba;
403
404 memcpy(&header->disk_guid,
405 &header2->disk_guid, sizeof(header2->disk_guid));
406 gpt_mknew_header_common(cxt, header, lba);
407
408 return 0;
409 }
410
411 /*
412 * Builds a clean new GPT header (currently under revision 1.0).
413 *
414 * Always pass a new (zeroized) header to build upon as we don't
415 * explicitly zero-set some values such as CRCs and reserved.
416 *
417 * Returns 0 on success, otherwise < 0 on error.
418 */
419 static int gpt_mknew_header(struct fdisk_context *cxt,
420 struct gpt_header *header, uint64_t lba)
421 {
422 uint64_t esz = 0, first, last;
423
424 if (!cxt || !header)
425 return -ENOSYS;
426
427 esz = sizeof(struct gpt_entry) * GPT_NPARTITIONS / cxt->sector_size;
428
429 header->signature = cpu_to_le64(GPT_HEADER_SIGNATURE);
430 header->revision = cpu_to_le32(GPT_HEADER_REVISION_V1_00);
431 header->size = cpu_to_le32(sizeof(struct gpt_header));
432
433 /*
434 * 128 partitions is the default. It can go behond this, however,
435 * we're creating a de facto header here, so no funny business.
436 */
437 header->npartition_entries = cpu_to_le32(GPT_NPARTITIONS);
438 header->sizeof_partition_entry = cpu_to_le32(sizeof(struct gpt_entry));
439
440 last = cxt->total_sectors - 2 - esz;
441 first = esz + 2;
442
443 if (first < cxt->first_lba && cxt->first_lba < last)
444 /* Align according to topology */
445 first = cxt->first_lba;
446
447 header->first_usable_lba = cpu_to_le64(first);
448 header->last_usable_lba = cpu_to_le64(last);
449
450 gpt_mknew_header_common(cxt, header, lba);
451 uuid_generate_random((unsigned char *) &header->disk_guid);
452 swap_efi_guid(&header->disk_guid);
453
454 return 0;
455 }
456
457 /*
458 * Checks if there is a valid protective MBR partition table.
459 * Returns 0 if it is invalid or failure. Otherwise, return
460 * GPT_MBR_PROTECTIVE or GPT_MBR_HYBRID, depeding on the detection.
461 */
462 static int valid_pmbr(struct fdisk_context *cxt)
463 {
464 int i, part = 0, ret = 0; /* invalid by default */
465 struct gpt_legacy_mbr *pmbr = NULL;
466 uint32_t sz_lba = 0;
467
468 if (!cxt->firstsector)
469 goto done;
470
471 pmbr = (struct gpt_legacy_mbr *) cxt->firstsector;
472
473 if (le16_to_cpu(pmbr->signature) != MSDOS_MBR_SIGNATURE)
474 goto done;
475
476 /* LBA of the GPT partition header */
477 if (pmbr->partition_record[0].starting_lba !=
478 cpu_to_le32(GPT_PRIMARY_PARTITION_TABLE_LBA))
479 goto done;
480
481 /* seems like a valid MBR was found, check DOS primary partitions */
482 for (i = 0; i < 4; i++) {
483 if (pmbr->partition_record[i].os_type == EFI_PMBR_OSTYPE) {
484 /*
485 * Ok, we at least know that there's a protective MBR,
486 * now check if there are other partition types for
487 * hybrid MBR.
488 */
489 part = i;
490 ret = GPT_MBR_PROTECTIVE;
491 goto check_hybrid;
492 }
493 }
494
495 if (ret != GPT_MBR_PROTECTIVE)
496 goto done;
497 check_hybrid:
498 for (i = 0 ; i < 4; i++) {
499 if ((pmbr->partition_record[i].os_type != EFI_PMBR_OSTYPE) &&
500 (pmbr->partition_record[i].os_type != 0x00))
501 ret = GPT_MBR_HYBRID;
502 }
503
504 /*
505 * Protective MBRs take up the lesser of the whole disk
506 * or 2 TiB (32bit LBA), ignoring the rest of the disk.
507 * Some partitioning programs, nonetheless, choose to set
508 * the size to the maximum 32-bit limitation, disregarding
509 * the disk size.
510 *
511 * Hybrid MBRs do not necessarily comply with this.
512 *
513 * Consider a bad value here to be a warning to support dd-ing
514 * an image from a smaller disk to a bigger disk.
515 */
516 if (ret == GPT_MBR_PROTECTIVE) {
517 sz_lba = le32_to_cpu(pmbr->partition_record[part].size_in_lba);
518 if (sz_lba != (uint32_t) cxt->total_sectors - 1 && sz_lba != 0xFFFFFFFF) {
519 fdisk_warnx(cxt, _("GPT PMBR size mismatch (%u != %u) "
520 "will be corrected by w(rite)."),
521 sz_lba,
522 (uint32_t) cxt->total_sectors - 1);
523 fdisk_label_set_changed(cxt->label, 1);
524 }
525 }
526 done:
527 return ret;
528 }
529
530 static uint64_t last_lba(struct fdisk_context *cxt)
531 {
532 struct stat s;
533
534 memset(&s, 0, sizeof(s));
535 if (fstat(cxt->dev_fd, &s) == -1) {
536 fdisk_warn(cxt, _("gpt: stat() failed"));
537 return 0;
538 }
539
540 if (S_ISBLK(s.st_mode))
541 return cxt->total_sectors - 1;
542 else if (S_ISREG(s.st_mode)) {
543 uint64_t sectors = s.st_size >> cxt->sector_size;
544 return (sectors / cxt->sector_size) - 1ULL;
545 } else
546 fdisk_warnx(cxt, _("gpt: cannot handle files with mode %o"), s.st_mode);
547 return 0;
548 }
549
550 static ssize_t read_lba(struct fdisk_context *cxt, uint64_t lba,
551 void *buffer, const size_t bytes)
552 {
553 off_t offset = lba * cxt->sector_size;
554
555 if (lseek(cxt->dev_fd, offset, SEEK_SET) == (off_t) -1)
556 return -1;
557 return read(cxt->dev_fd, buffer, bytes) != bytes;
558 }
559
560
561 /* Returns the GPT entry array */
562 static struct gpt_entry *gpt_read_entries(struct fdisk_context *cxt,
563 struct gpt_header *header)
564 {
565 ssize_t sz;
566 struct gpt_entry *ret = NULL;
567 off_t offset;
568
569 assert(cxt);
570 assert(header);
571
572 sz = le32_to_cpu(header->npartition_entries) *
573 le32_to_cpu(header->sizeof_partition_entry);
574
575 ret = calloc(1, sz);
576 if (!ret)
577 return NULL;
578 offset = le64_to_cpu(header->partition_entry_lba) *
579 cxt->sector_size;
580
581 if (offset != lseek(cxt->dev_fd, offset, SEEK_SET))
582 goto fail;
583 if (sz != read(cxt->dev_fd, ret, sz))
584 goto fail;
585
586 return ret;
587
588 fail:
589 free(ret);
590 return NULL;
591 }
592
593 static inline uint32_t count_crc32(const unsigned char *buf, size_t len)
594 {
595 return (crc32(~0L, buf, len) ^ ~0L);
596 }
597
598 /*
599 * Recompute header and partition array 32bit CRC checksums.
600 * This function does not fail - if there's corruption, then it
601 * will be reported when checksuming it again (ie: probing or verify).
602 */
603 static void gpt_recompute_crc(struct gpt_header *header, struct gpt_entry *ents)
604 {
605 uint32_t crc = 0;
606 size_t entry_sz = 0;
607
608 if (!header)
609 return;
610
611 /* header CRC */
612 header->crc32 = 0;
613 crc = count_crc32((unsigned char *) header, le32_to_cpu(header->size));
614 header->crc32 = cpu_to_le32(crc);
615
616 /* partition entry array CRC */
617 header->partition_entry_array_crc32 = 0;
618 entry_sz = le32_to_cpu(header->npartition_entries) *
619 le32_to_cpu(header->sizeof_partition_entry);
620
621 crc = count_crc32((unsigned char *) ents, entry_sz);
622 header->partition_entry_array_crc32 = cpu_to_le32(crc);
623 }
624
625 /*
626 * Compute the 32bit CRC checksum of the partition table header.
627 * Returns 1 if it is valid, otherwise 0.
628 */
629 static int gpt_check_header_crc(struct gpt_header *header, struct gpt_entry *ents)
630 {
631 uint32_t crc, orgcrc = le32_to_cpu(header->crc32);
632
633 header->crc32 = 0;
634 crc = count_crc32((unsigned char *) header, le32_to_cpu(header->size));
635 header->crc32 = cpu_to_le32(orgcrc);
636
637 if (crc == le32_to_cpu(header->crc32))
638 return 1;
639
640 /*
641 * If we have checksum mismatch it may be due to stale data,
642 * like a partition being added or deleted. Recompute the CRC again
643 * and make sure this is not the case.
644 */
645 if (ents) {
646 gpt_recompute_crc(header, ents);
647 orgcrc = le32_to_cpu(header->crc32);
648 header->crc32 = 0;
649 crc = count_crc32((unsigned char *) header, le32_to_cpu(header->size));
650 header->crc32 = cpu_to_le32(orgcrc);
651
652 return crc == le32_to_cpu(header->crc32);
653 }
654
655 return 0;
656 }
657
658 /*
659 * It initializes the partition entry array.
660 * Returns 1 if the checksum is valid, otherwise 0.
661 */
662 static int gpt_check_entryarr_crc(struct gpt_header *header,
663 struct gpt_entry *ents)
664 {
665 int ret = 0;
666 ssize_t entry_sz;
667 uint32_t crc;
668
669 if (!header || !ents)
670 goto done;
671
672 entry_sz = le32_to_cpu(header->npartition_entries) *
673 le32_to_cpu(header->sizeof_partition_entry);
674
675 if (!entry_sz)
676 goto done;
677
678 crc = count_crc32((unsigned char *) ents, entry_sz);
679 ret = (crc == le32_to_cpu(header->partition_entry_array_crc32));
680 done:
681 return ret;
682 }
683
684 static int gpt_check_lba_sanity(struct fdisk_context *cxt, struct gpt_header *header)
685 {
686 int ret = 0;
687 uint64_t lu, fu, lastlba = last_lba(cxt);
688
689 fu = le64_to_cpu(header->first_usable_lba);
690 lu = le64_to_cpu(header->last_usable_lba);
691
692 /* check if first and last usable LBA make sense */
693 if (lu < fu) {
694 DBG(LABEL, dbgprint("error: header last LBA is before first LBA"));
695 goto done;
696 }
697
698 /* check if first and last usable LBAs with the disk's last LBA */
699 if (fu > lastlba || lu > lastlba) {
700 DBG(LABEL, dbgprint("error: header LBAs are after the disk's last LBA"));
701 goto done;
702 }
703
704 /* the header has to be outside usable range */
705 if (fu < GPT_PRIMARY_PARTITION_TABLE_LBA &&
706 GPT_PRIMARY_PARTITION_TABLE_LBA < lu) {
707 DBG(LABEL, dbgprint("error: header outside of usable range"));
708 goto done;
709 }
710
711 ret = 1; /* sane */
712 done:
713 return ret;
714 }
715
716 /* Check if there is a valid header signature */
717 static int gpt_check_signature(struct gpt_header *header)
718 {
719 return header->signature == cpu_to_le64(GPT_HEADER_SIGNATURE);
720 }
721
722 /*
723 * Return the specified GPT Header, or NULL upon failure/invalid.
724 * Note that all tests must pass to ensure a valid header,
725 * we do not rely on only testing the signature for a valid probe.
726 */
727 static struct gpt_header *gpt_read_header(struct fdisk_context *cxt,
728 uint64_t lba,
729 struct gpt_entry **_ents)
730 {
731 struct gpt_header *header = NULL;
732 struct gpt_entry *ents = NULL;
733 uint32_t hsz;
734
735 if (!cxt)
736 return NULL;
737
738 header = calloc(1, sizeof(*header));
739 if (!header)
740 return NULL;
741
742 /* read and verify header */
743 if (read_lba(cxt, lba, header, sizeof(struct gpt_header)) != 0)
744 goto invalid;
745
746 if (!gpt_check_signature(header))
747 goto invalid;
748
749 if (!gpt_check_header_crc(header, NULL))
750 goto invalid;
751
752 /* read and verify entries */
753 ents = gpt_read_entries(cxt, header);
754 if (!ents)
755 goto invalid;
756
757 if (!gpt_check_entryarr_crc(header, ents))
758 goto invalid;
759
760 if (!gpt_check_lba_sanity(cxt, header))
761 goto invalid;
762
763 /* valid header must be at MyLBA */
764 if (le64_to_cpu(header->my_lba) != lba)
765 goto invalid;
766
767 /* make sure header size is between 92 and sector size bytes */
768 hsz = le32_to_cpu(header->size);
769 if (hsz < GPT_HEADER_MINSZ || hsz > cxt->sector_size)
770 goto invalid;
771
772 if (_ents)
773 *_ents = ents;
774 else
775 free(ents);
776
777 return header;
778 invalid:
779 free(header);
780 free(ents);
781 return NULL;
782 }
783
784
785 static int gpt_locate_disklabel(struct fdisk_context *cxt, int n,
786 const char **name, off_t *offset, size_t *size)
787 {
788 struct fdisk_gpt_label *gpt;
789
790 assert(cxt);
791
792 *name = NULL;
793 *offset = 0;
794 *size = 0;
795
796 switch (n) {
797 case 0:
798 *name = "PMBR";
799 *offset = 0;
800 *size = 512;
801 break;
802 case 1:
803 *name = _("GPT Header");
804 *offset = GPT_PRIMARY_PARTITION_TABLE_LBA * cxt->sector_size;
805 *size = sizeof(struct gpt_header);
806 break;
807 case 2:
808 *name = _("GPT Entries");
809 gpt = self_label(cxt);
810 *offset = le64_to_cpu(gpt->pheader->partition_entry_lba) * cxt->sector_size;
811 *size = le32_to_cpu(gpt->pheader->npartition_entries) *
812 le32_to_cpu(gpt->pheader->sizeof_partition_entry);
813 break;
814 default:
815 return 1; /* no more chunks */
816 }
817
818 return 0;
819 }
820
821
822
823 /*
824 * Returns the number of partitions that are in use.
825 */
826 static unsigned partitions_in_use(struct gpt_header *header, struct gpt_entry *e)
827 {
828 uint32_t i, used = 0;
829
830 if (!header || ! e)
831 return 0;
832
833 for (i = 0; i < le32_to_cpu(header->npartition_entries); i++)
834 if (!partition_unused(&e[i]))
835 used++;
836 return used;
837 }
838
839
840 /*
841 * Check if a partition is too big for the disk (sectors).
842 * Returns the faulting partition number, otherwise 0.
843 */
844 static uint32_t partition_check_too_big(struct gpt_header *header,
845 struct gpt_entry *e, uint64_t sectors)
846 {
847 uint32_t i;
848
849 for (i = 0; i < le32_to_cpu(header->npartition_entries); i++) {
850 if (partition_unused(&e[i]))
851 continue;
852 if (gpt_partition_end(&e[i]) >= sectors)
853 return i + 1;
854 }
855
856 return 0;
857 }
858
859 /*
860 * Check if a partition ends before it begins
861 * Returns the faulting partition number, otherwise 0.
862 */
863 static uint32_t partition_start_after_end(struct gpt_header *header, struct gpt_entry *e)
864 {
865 uint32_t i;
866
867 for (i = 0; i < le32_to_cpu(header->npartition_entries); i++) {
868 if (partition_unused(&e[i]))
869 continue;
870 if (gpt_partition_start(&e[i]) > gpt_partition_end(&e[i]))
871 return i + 1;
872 }
873
874 return 0;
875 }
876
877 /*
878 * Check if partition e1 overlaps with partition e2
879 */
880 static inline int partition_overlap(struct gpt_entry *e1, struct gpt_entry *e2)
881 {
882 uint64_t start1 = gpt_partition_start(e1);
883 uint64_t end1 = gpt_partition_end(e1);
884 uint64_t start2 = gpt_partition_start(e2);
885 uint64_t end2 = gpt_partition_end(e2);
886
887 return (start1 && start2 && (start1 <= end2) != (end1 < start2));
888 }
889
890 /*
891 * Find any paritions that overlap.
892 */
893 static uint32_t partition_check_overlaps(struct gpt_header *header, struct gpt_entry *e)
894 {
895 uint32_t i, j;
896
897 for (i = 0; i < le32_to_cpu(header->npartition_entries); i++)
898 for (j = 0; j < i; j++) {
899 if (partition_unused(&e[i]) ||
900 partition_unused(&e[j]))
901 continue;
902 if (partition_overlap(&e[i], &e[j])) {
903 DBG(LABEL, dbgprint("GPT partitions overlap detected [%u vs. %u]", i, j));
904 return i + 1;
905 }
906 }
907
908 return 0;
909 }
910
911 /*
912 * Find the first available block after the starting point; returns 0 if
913 * there are no available blocks left, or error. From gdisk.
914 */
915 static uint64_t find_first_available(struct gpt_header *header,
916 struct gpt_entry *e, uint64_t start)
917 {
918 uint64_t first;
919 uint32_t i, first_moved = 0;
920
921 uint64_t fu, lu;
922
923 if (!header || !e)
924 return 0;
925
926 fu = le64_to_cpu(header->first_usable_lba);
927 lu = le64_to_cpu(header->last_usable_lba);
928
929 /*
930 * Begin from the specified starting point or from the first usable
931 * LBA, whichever is greater...
932 */
933 first = start < fu ? fu : start;
934
935 /*
936 * Now search through all partitions; if first is within an
937 * existing partition, move it to the next sector after that
938 * partition and repeat. If first was moved, set firstMoved
939 * flag; repeat until firstMoved is not set, so as to catch
940 * cases where partitions are out of sequential order....
941 */
942 do {
943 first_moved = 0;
944 for (i = 0; i < le32_to_cpu(header->npartition_entries); i++) {
945 if (partition_unused(&e[i]))
946 continue;
947 if (first < gpt_partition_start(&e[i]))
948 continue;
949 if (first <= gpt_partition_end(&e[i])) {
950 first = gpt_partition_end(&e[i]) + 1;
951 first_moved = 1;
952 }
953 }
954 } while (first_moved == 1);
955
956 if (first > lu)
957 first = 0;
958
959 return first;
960 }
961
962
963 /* Returns last available sector in the free space pointed to by start. From gdisk. */
964 static uint64_t find_last_free(struct gpt_header *header,
965 struct gpt_entry *e, uint64_t start)
966 {
967 uint32_t i;
968 uint64_t nearest_start;
969
970 if (!header || !e)
971 return 0;
972
973 nearest_start = le64_to_cpu(header->last_usable_lba);
974
975 for (i = 0; i < le32_to_cpu(header->npartition_entries); i++) {
976 uint64_t ps = gpt_partition_start(&e[i]);
977
978 if (nearest_start > ps && ps > start)
979 nearest_start = ps - 1;
980 }
981
982 return nearest_start;
983 }
984
985 /* Returns the last free sector on the disk. From gdisk. */
986 static uint64_t find_last_free_sector(struct gpt_header *header,
987 struct gpt_entry *e)
988 {
989 uint32_t i, last_moved;
990 uint64_t last = 0;
991
992 if (!header || !e)
993 goto done;
994
995 /* start by assuming the last usable LBA is available */
996 last = le64_to_cpu(header->last_usable_lba);
997 do {
998 last_moved = 0;
999 for (i = 0; i < le32_to_cpu(header->npartition_entries); i++) {
1000 if ((last >= gpt_partition_start(&e[i])) &&
1001 (last <= gpt_partition_end(&e[i]))) {
1002 last = gpt_partition_start(&e[i]) - 1;
1003 last_moved = 1;
1004 }
1005 }
1006 } while (last_moved == 1);
1007 done:
1008 return last;
1009 }
1010
1011 /*
1012 * Finds the first available sector in the largest block of unallocated
1013 * space on the disk. Returns 0 if there are no available blocks left.
1014 * From gdisk.
1015 */
1016 static uint64_t find_first_in_largest(struct gpt_header *header, struct gpt_entry *e)
1017 {
1018 uint64_t start = 0, first_sect, last_sect;
1019 uint64_t segment_size, selected_size = 0, selected_segment = 0;
1020
1021 if (!header || !e)
1022 goto done;
1023
1024 do {
1025 first_sect = find_first_available(header, e, start);
1026 if (first_sect != 0) {
1027 last_sect = find_last_free(header, e, first_sect);
1028 segment_size = last_sect - first_sect + 1;
1029
1030 if (segment_size > selected_size) {
1031 selected_size = segment_size;
1032 selected_segment = first_sect;
1033 }
1034 start = last_sect + 1;
1035 }
1036 } while (first_sect != 0);
1037
1038 done:
1039 return selected_segment;
1040 }
1041
1042 /*
1043 * Find the total number of free sectors, the number of segments in which
1044 * they reside, and the size of the largest of those segments. From gdisk.
1045 */
1046 static uint64_t get_free_sectors(struct fdisk_context *cxt, struct gpt_header *header,
1047 struct gpt_entry *e, uint32_t *nsegments,
1048 uint64_t *largest_segment)
1049 {
1050 uint32_t num = 0;
1051 uint64_t first_sect, last_sect;
1052 uint64_t largest_seg = 0, segment_sz;
1053 uint64_t totfound = 0, start = 0; /* starting point for each search */
1054
1055 if (!cxt->total_sectors)
1056 goto done;
1057
1058 do {
1059 first_sect = find_first_available(header, e, start);
1060 if (first_sect) {
1061 last_sect = find_last_free(header, e, first_sect);
1062 segment_sz = last_sect - first_sect + 1;
1063
1064 if (segment_sz > largest_seg)
1065 largest_seg = segment_sz;
1066 totfound += segment_sz;
1067 num++;
1068 start = last_sect + 1;
1069 }
1070 } while (first_sect);
1071
1072 done:
1073 if (nsegments)
1074 *nsegments = num;
1075 if (largest_segment)
1076 *largest_segment = largest_seg;
1077
1078 return totfound;
1079 }
1080
1081 static int gpt_probe_label(struct fdisk_context *cxt)
1082 {
1083 int mbr_type;
1084 struct fdisk_gpt_label *gpt;
1085
1086 assert(cxt);
1087 assert(cxt->label);
1088 assert(fdisk_is_disklabel(cxt, GPT));
1089
1090 gpt = self_label(cxt);
1091
1092 mbr_type = valid_pmbr(cxt);
1093 if (!mbr_type)
1094 goto failed;
1095
1096 DBG(LABEL, dbgprint("found a %s MBR", mbr_type == GPT_MBR_PROTECTIVE ?
1097 "protective" : "hybrid"));
1098
1099 /* primary header */
1100 gpt->pheader = gpt_read_header(cxt, GPT_PRIMARY_PARTITION_TABLE_LBA,
1101 &gpt->ents);
1102
1103 /*
1104 * TODO: If the primary GPT is corrupt, we must check the last LBA of the
1105 * device to see if it has a valid GPT Header and point to a valid GPT
1106 * Partition Entry Array.
1107 * If it points to a valid GPT Partition Entry Array, then software should
1108 * restore the primary GPT if allowed by platform policy settings.
1109 *
1110 * For now we just abort GPT probing!
1111 */
1112 if (!gpt->pheader || !gpt->ents)
1113 goto failed;
1114
1115 /* OK, probing passed, now initialize backup header and fdisk variables. */
1116 gpt->bheader = gpt_read_header(cxt, last_lba(cxt), NULL);
1117
1118 cxt->label->nparts_max = le32_to_cpu(gpt->pheader->npartition_entries);
1119 cxt->label->nparts_cur = partitions_in_use(gpt->pheader, gpt->ents);
1120 return 1;
1121 failed:
1122 DBG(LABEL, dbgprint("GPT probe failed"));
1123 gpt_deinit(cxt->label);
1124 return 0;
1125 }
1126
1127 /*
1128 * Stolen from libblkid - can be removed once partition semantics
1129 * are added to the fdisk API.
1130 */
1131 static char *encode_to_utf8(unsigned char *src, size_t count)
1132 {
1133 uint16_t c;
1134 char *dest;
1135 size_t i, j, len = count;
1136
1137 dest = calloc(1, count);
1138 if (!dest)
1139 return NULL;
1140
1141 for (j = i = 0; i + 2 <= count; i += 2) {
1142 /* always little endian */
1143 c = (src[i+1] << 8) | src[i];
1144 if (c == 0) {
1145 dest[j] = '\0';
1146 break;
1147 } else if (c < 0x80) {
1148 if (j+1 >= len)
1149 break;
1150 dest[j++] = (uint8_t) c;
1151 } else if (c < 0x800) {
1152 if (j+2 >= len)
1153 break;
1154 dest[j++] = (uint8_t) (0xc0 | (c >> 6));
1155 dest[j++] = (uint8_t) (0x80 | (c & 0x3f));
1156 } else {
1157 if (j+3 >= len)
1158 break;
1159 dest[j++] = (uint8_t) (0xe0 | (c >> 12));
1160 dest[j++] = (uint8_t) (0x80 | ((c >> 6) & 0x3f));
1161 dest[j++] = (uint8_t) (0x80 | (c & 0x3f));
1162 }
1163 }
1164 dest[j] = '\0';
1165
1166 return dest;
1167 }
1168
1169 /*
1170 * List label partitions.
1171 * This function must currently exist to comply with standard fdisk
1172 * requirements, but once partition semantics are added to the fdisk
1173 * API it can be removed for custom implementation (see gpt_label struct).
1174 */
1175 static int gpt_list_disklabel(struct fdisk_context *cxt)
1176 {
1177 int rc, trunc = TT_FL_TRUNC;
1178 uint32_t i;
1179 struct fdisk_gpt_label *gpt;
1180 struct gpt_header *h;
1181 uint64_t fu;
1182 uint64_t lu;
1183 struct tt *tb = NULL;
1184
1185 assert(cxt);
1186 assert(cxt->label);
1187 assert(fdisk_is_disklabel(cxt, GPT));
1188
1189 gpt = self_label(cxt);
1190 h = gpt->pheader;
1191 fu = le64_to_cpu(gpt->pheader->first_usable_lba);
1192 lu = le64_to_cpu(gpt->pheader->last_usable_lba);
1193
1194 tb = tt_new_table(TT_FL_FREEDATA);
1195 if (!tb)
1196 return -ENOMEM;
1197
1198 /* don't trunc anything in expert mode */
1199 if (fdisk_context_display_details(cxt)) {
1200 trunc = 0;
1201 fdisk_colon(cxt, _("First LBA: %ju"), h->first_usable_lba);
1202 fdisk_colon(cxt, _("Last LBA: %ju"), h->last_usable_lba);
1203 fdisk_colon(cxt, _("Alternative LBA: %ju"), h->alternative_lba);
1204 fdisk_colon(cxt, _("Partitions entries LBA: %ju"), h->partition_entry_lba);
1205 fdisk_colon(cxt, _("Allocated partition entries: %ju"), h->npartition_entries);
1206 }
1207 tt_define_column(tb, _("Device"), 0.1, 0);
1208 tt_define_column(tb, _("Start"), 12, TT_FL_RIGHT);
1209 tt_define_column(tb, _("End"), 12, TT_FL_RIGHT);
1210 tt_define_column(tb, _("Size"), 6, TT_FL_RIGHT);
1211 tt_define_column(tb, _("Type"), 0.1, trunc);
1212
1213 if (fdisk_context_display_details(cxt)) {
1214 tt_define_column(tb, _("UUID"), 36, 0);
1215 tt_define_column(tb, _("Name"), 0.2, trunc);
1216 }
1217
1218 for (i = 0; i < le32_to_cpu(h->npartition_entries); i++) {
1219 struct gpt_entry *e = &gpt->ents[i];
1220 char *sizestr = NULL, *p;
1221 uint64_t start = gpt_partition_start(e);
1222 uint64_t size = gpt_partition_size(e);
1223 struct fdisk_parttype *t;
1224 struct tt_line *ln;
1225 char u_str[37];
1226
1227 if (partition_unused(&gpt->ents[i]) || start == 0)
1228 continue;
1229 /* the partition has to inside usable range */
1230 if (start < fu || start + size - 1 > lu)
1231 continue;
1232 ln = tt_add_line(tb, NULL);
1233 if (!ln)
1234 continue;
1235
1236 if (fdisk_context_display_details(cxt) &&
1237 asprintf(&p, "%ju", size * cxt->sector_size) > 0)
1238 sizestr = p;
1239 else
1240 sizestr = size_to_human_string(SIZE_SUFFIX_1LETTER,
1241 size * cxt->sector_size);
1242 t = fdisk_get_partition_type(cxt, i);
1243
1244 /* basic columns */
1245 p = fdisk_partname(cxt->dev_path, i + 1);
1246 if (p)
1247 tt_line_set_data(ln, 0, p);
1248 if (asprintf(&p, "%ju", start) > 0)
1249 tt_line_set_data(ln, 1, p);
1250 if (asprintf(&p, "%ju", gpt_partition_end(e)) > 0)
1251 tt_line_set_data(ln, 2, p);
1252 if (sizestr)
1253 tt_line_set_data(ln, 3, sizestr);
1254 if (t && t->name)
1255 tt_line_set_data(ln, 4, strdup(t->name));
1256
1257 /* expert menu column(s) */
1258 if (fdisk_context_display_details(cxt)) {
1259 char *name = encode_to_utf8(
1260 (unsigned char *)e->name,
1261 sizeof(e->name));
1262
1263 if (guid_to_string(&e->partition_guid, u_str))
1264 tt_line_set_data(ln, 5, strdup(u_str));
1265 if (name)
1266 tt_line_set_data(ln, 6, name);
1267 }
1268
1269 fdisk_warn_alignment(cxt, start, i);
1270 fdisk_free_parttype(t);
1271 }
1272
1273 rc = fdisk_print_table(cxt, tb);
1274 tt_free_table(tb);
1275
1276 return rc;
1277 }
1278
1279 /*
1280 * Write partitions.
1281 * Returns 0 on success, or corresponding error otherwise.
1282 */
1283 static int gpt_write_partitions(struct fdisk_context *cxt,
1284 struct gpt_header *header, struct gpt_entry *ents)
1285 {
1286 off_t offset = le64_to_cpu(header->partition_entry_lba) * cxt->sector_size;
1287 uint32_t nparts = le32_to_cpu(header->npartition_entries);
1288 uint32_t totwrite = nparts * le32_to_cpu(header->sizeof_partition_entry);
1289 ssize_t rc;
1290
1291 if (offset != lseek(cxt->dev_fd, offset, SEEK_SET))
1292 goto fail;
1293
1294 rc = write(cxt->dev_fd, ents, totwrite);
1295 if (rc > 0 && totwrite == (uint32_t) rc)
1296 return 0;
1297 fail:
1298 return -errno;
1299 }
1300
1301 /*
1302 * Write a GPT header to a specified LBA
1303 * Returns 0 on success, or corresponding error otherwise.
1304 */
1305 static int gpt_write_header(struct fdisk_context *cxt,
1306 struct gpt_header *header, uint64_t lba)
1307 {
1308 off_t offset = lba * cxt->sector_size;
1309
1310 if (offset != lseek(cxt->dev_fd, offset, SEEK_SET))
1311 goto fail;
1312 if (cxt->sector_size ==
1313 (size_t) write(cxt->dev_fd, header, cxt->sector_size))
1314 return 0;
1315 fail:
1316 return -errno;
1317 }
1318
1319 /*
1320 * Write the protective MBR.
1321 * Returns 0 on success, or corresponding error otherwise.
1322 */
1323 static int gpt_write_pmbr(struct fdisk_context *cxt)
1324 {
1325 off_t offset;
1326 struct gpt_legacy_mbr *pmbr = NULL;
1327
1328 assert(cxt);
1329 assert(cxt->firstsector);
1330
1331 pmbr = (struct gpt_legacy_mbr *) cxt->firstsector;
1332
1333 /* zero out the legacy partitions */
1334 memset(pmbr->partition_record, 0, sizeof(pmbr->partition_record));
1335
1336 pmbr->signature = cpu_to_le16(MSDOS_MBR_SIGNATURE);
1337 pmbr->partition_record[0].os_type = EFI_PMBR_OSTYPE;
1338 pmbr->partition_record[0].start_sector = 1;
1339 pmbr->partition_record[0].end_head = 0xFE;
1340 pmbr->partition_record[0].end_sector = 0xFF;
1341 pmbr->partition_record[0].end_track = 0xFF;
1342 pmbr->partition_record[0].starting_lba = cpu_to_le32(1);
1343
1344 /*
1345 * Set size_in_lba to the size of the disk minus one. If the size of the disk
1346 * is too large to be represented by a 32bit LBA (2Tb), set it to 0xFFFFFFFF.
1347 */
1348 if (cxt->total_sectors - 1 > 0xFFFFFFFFULL)
1349 pmbr->partition_record[0].size_in_lba = cpu_to_le32(0xFFFFFFFF);
1350 else
1351 pmbr->partition_record[0].size_in_lba =
1352 cpu_to_le32(cxt->total_sectors - 1UL);
1353
1354 offset = GPT_PMBR_LBA * cxt->sector_size;
1355 if (offset != lseek(cxt->dev_fd, offset, SEEK_SET))
1356 goto fail;
1357
1358 /* pMBR covers the first sector (LBA) of the disk */
1359 if (write_all(cxt->dev_fd, pmbr, cxt->sector_size))
1360 goto fail;
1361 return 0;
1362 fail:
1363 return -errno;
1364 }
1365
1366 /*
1367 * Writes in-memory GPT and pMBR data to disk.
1368 * Returns 0 if successful write, otherwise, a corresponding error.
1369 * Any indication of error will abort the operation.
1370 */
1371 static int gpt_write_disklabel(struct fdisk_context *cxt)
1372 {
1373 struct fdisk_gpt_label *gpt;
1374
1375 assert(cxt);
1376 assert(cxt->label);
1377 assert(fdisk_is_disklabel(cxt, GPT));
1378
1379 gpt = self_label(cxt);
1380
1381 /* we do not want to mess up hybrid MBRs by creating a valid pmbr */
1382 if (valid_pmbr(cxt) == GPT_MBR_HYBRID)
1383 goto err0;
1384
1385 /* check that disk is big enough to handle the backup header */
1386 if (le64_to_cpu(gpt->pheader->alternative_lba) > cxt->total_sectors)
1387 goto err0;
1388
1389 /* check that the backup header is properly placed */
1390 if (le64_to_cpu(gpt->pheader->alternative_lba) < cxt->total_sectors - 1)
1391 /* TODO: correct this (with user authorization) and write */
1392 goto err0;
1393
1394 if (partition_check_overlaps(gpt->pheader, gpt->ents))
1395 goto err0;
1396
1397 /* recompute CRCs for both headers */
1398 gpt_recompute_crc(gpt->pheader, gpt->ents);
1399 gpt_recompute_crc(gpt->bheader, gpt->ents);
1400
1401 /*
1402 * UEFI requires writing in this specific order:
1403 * 1) backup partition tables
1404 * 2) backup GPT header
1405 * 3) primary partition tables
1406 * 4) primary GPT header
1407 * 5) protective MBR
1408 *
1409 * If any write fails, we abort the rest.
1410 */
1411 if (gpt_write_partitions(cxt, gpt->bheader, gpt->ents) != 0)
1412 goto err1;
1413 if (gpt_write_header(cxt, gpt->bheader,
1414 le64_to_cpu(gpt->pheader->alternative_lba)) != 0)
1415 goto err1;
1416 if (gpt_write_partitions(cxt, gpt->pheader, gpt->ents) != 0)
1417 goto err1;
1418 if (gpt_write_header(cxt, gpt->pheader, GPT_PRIMARY_PARTITION_TABLE_LBA) != 0)
1419 goto err1;
1420 if (gpt_write_pmbr(cxt) != 0)
1421 goto err1;
1422
1423 DBG(LABEL, dbgprint("GPT write success"));
1424 return 0;
1425 err0:
1426 DBG(LABEL, dbgprint("GPT write failed: incorrect input"));
1427 errno = EINVAL;
1428 return -EINVAL;
1429 err1:
1430 DBG(LABEL, dbgprint("GPT write failed: %m"));
1431 return -errno;
1432 }
1433
1434 /*
1435 * Verify data integrity and report any found problems for:
1436 * - primary and backup header validations
1437 * - paritition validations
1438 */
1439 static int gpt_verify_disklabel(struct fdisk_context *cxt)
1440 {
1441 int nerror = 0;
1442 unsigned int ptnum;
1443 struct fdisk_gpt_label *gpt;
1444
1445 assert(cxt);
1446 assert(cxt->label);
1447 assert(fdisk_is_disklabel(cxt, GPT));
1448
1449 gpt = self_label(cxt);
1450
1451 if (!gpt || !gpt->bheader) {
1452 nerror++;
1453 fdisk_warnx(cxt, _("Disk does not contain a valid backup header."));
1454 }
1455
1456 if (!gpt_check_header_crc(gpt->pheader, gpt->ents)) {
1457 nerror++;
1458 fdisk_warnx(cxt, _("Invalid primary header CRC checksum."));
1459 }
1460 if (gpt->bheader && !gpt_check_header_crc(gpt->bheader, gpt->ents)) {
1461 nerror++;
1462 fdisk_warnx(cxt, _("Invalid backup header CRC checksum."));
1463 }
1464
1465 if (!gpt_check_entryarr_crc(gpt->pheader, gpt->ents)) {
1466 nerror++;
1467 fdisk_warnx(cxt, _("Invalid partition entry checksum."));
1468 }
1469
1470 if (!gpt_check_lba_sanity(cxt, gpt->pheader)) {
1471 nerror++;
1472 fdisk_warnx(cxt, _("Invalid primary header LBA sanity checks."));
1473 }
1474 if (gpt->bheader && !gpt_check_lba_sanity(cxt, gpt->bheader)) {
1475 nerror++;
1476 fdisk_warnx(cxt, _("Invalid backup header LBA sanity checks."));
1477 }
1478
1479 if (le64_to_cpu(gpt->pheader->my_lba) != GPT_PRIMARY_PARTITION_TABLE_LBA) {
1480 nerror++;
1481 fdisk_warnx(cxt, _("MyLBA mismatch with real position at primary header."));
1482 }
1483 if (gpt->bheader && le64_to_cpu(gpt->bheader->my_lba) != last_lba(cxt)) {
1484 nerror++;
1485 fdisk_warnx(cxt, _("MyLBA mismatch with real position at backup header."));
1486
1487 }
1488 if (le64_to_cpu(gpt->pheader->alternative_lba) >= cxt->total_sectors) {
1489 nerror++;
1490 fdisk_warnx(cxt, _("Disk is too small to hold all data."));
1491 }
1492
1493 /*
1494 * if the GPT is the primary table, check the alternateLBA
1495 * to see if it is a valid GPT
1496 */
1497 if (gpt->bheader && (le64_to_cpu(gpt->pheader->my_lba) !=
1498 le64_to_cpu(gpt->bheader->alternative_lba))) {
1499 nerror++;
1500 fdisk_warnx(cxt, _("Primary and backup header mismatch."));
1501 }
1502
1503 ptnum = partition_check_overlaps(gpt->pheader, gpt->ents);
1504 if (ptnum) {
1505 nerror++;
1506 fdisk_warnx(cxt, _("Partition %u overlaps with partition %u."),
1507 ptnum, ptnum+1);
1508 }
1509
1510 ptnum = partition_check_too_big(gpt->pheader, gpt->ents, cxt->total_sectors);
1511 if (ptnum) {
1512 nerror++;
1513 fdisk_warnx(cxt, _("Partition %u is too big for the disk."),
1514 ptnum);
1515 }
1516
1517 ptnum = partition_start_after_end(gpt->pheader, gpt->ents);
1518 if (ptnum) {
1519 nerror++;
1520 fdisk_warnx(cxt, _("Partition %u ends before it starts."),
1521 ptnum);
1522 }
1523
1524 if (!nerror) { /* yay :-) */
1525 uint32_t nsegments = 0;
1526 uint64_t free_sectors = 0, largest_segment = 0;
1527
1528 fdisk_info(cxt, _("No errors detected."));
1529 fdisk_info(cxt, _("Header version: %s"), gpt_get_header_revstr(gpt->pheader));
1530 fdisk_info(cxt, _("Using %u out of %d partitions."),
1531 partitions_in_use(gpt->pheader, gpt->ents),
1532 le32_to_cpu(gpt->pheader->npartition_entries));
1533
1534 free_sectors = get_free_sectors(cxt, gpt->pheader, gpt->ents,
1535 &nsegments, &largest_segment);
1536 fdisk_info(cxt,
1537 P_("A total of %ld free sectors is available in %d segment.",
1538 "A total of %ld free sectors is available in %d segments "
1539 "(the largest is %ld).", nsegments),
1540 free_sectors, nsegments, largest_segment);
1541 } else
1542 fdisk_warnx(cxt,
1543 P_("%d error detected.", "%d errors detected.", nerror),
1544 nerror);
1545
1546 return 0;
1547 }
1548
1549 /* Delete a single GPT partition, specified by partnum. */
1550 static int gpt_delete_partition(struct fdisk_context *cxt,
1551 size_t partnum)
1552 {
1553 struct fdisk_gpt_label *gpt;
1554
1555 assert(cxt);
1556 assert(cxt->label);
1557 assert(fdisk_is_disklabel(cxt, GPT));
1558
1559 gpt = self_label(cxt);
1560
1561 if (partnum >= cxt->label->nparts_max
1562 || partition_unused(&gpt->ents[partnum]))
1563 return -EINVAL;
1564
1565 /* hasta la vista, baby! */
1566 memset(&gpt->ents[partnum], 0, sizeof(struct gpt_entry));
1567 if (!partition_unused(&gpt->ents[partnum]))
1568 return -EINVAL;
1569 else {
1570 gpt_recompute_crc(gpt->pheader, gpt->ents);
1571 gpt_recompute_crc(gpt->bheader, gpt->ents);
1572 cxt->label->nparts_cur--;
1573 fdisk_label_set_changed(cxt->label, 1);
1574 }
1575
1576 return 0;
1577 }
1578
1579 static void gpt_entry_set_type(struct gpt_entry *e, struct gpt_guid *uuid)
1580 {
1581 e->type = *uuid;
1582 DBG(LABEL, dbgprint_uuid("new type", &(e->type)));
1583 }
1584
1585 /*
1586 * Create a new GPT partition entry, specified by partnum, and with a range
1587 * of fsect to lsenct sectors, of type t.
1588 * Returns 0 on success, or negative upon failure.
1589 */
1590 static int gpt_create_new_partition(struct fdisk_context *cxt,
1591 size_t partnum, uint64_t fsect, uint64_t lsect,
1592 struct gpt_guid *type,
1593 struct gpt_entry *entries)
1594 {
1595 struct gpt_entry *e = NULL;
1596 struct fdisk_gpt_label *gpt;
1597
1598 assert(cxt);
1599 assert(cxt->label);
1600 assert(fdisk_is_disklabel(cxt, GPT));
1601
1602 gpt = self_label(cxt);
1603
1604 if (fsect > lsect || partnum >= cxt->label->nparts_max)
1605 return -EINVAL;
1606
1607 e = calloc(1, sizeof(*e));
1608 if (!e)
1609 return -ENOMEM;
1610 e->lba_end = cpu_to_le64(lsect);
1611 e->lba_start = cpu_to_le64(fsect);
1612
1613 gpt_entry_set_type(e, type);
1614
1615 /*
1616 * Any time a new partition entry is created a new GUID must be
1617 * generated for that partition, and every partition is guaranteed
1618 * to have a unique GUID.
1619 */
1620 uuid_generate_random((unsigned char *) &e->partition_guid);
1621 swap_efi_guid(&e->partition_guid);
1622
1623 memcpy(&entries[partnum], e, sizeof(*e));
1624
1625 gpt_recompute_crc(gpt->pheader, entries);
1626 gpt_recompute_crc(gpt->bheader, entries);
1627
1628 free(e);
1629 return 0;
1630 }
1631
1632 /* Performs logical checks to add a new partition entry */
1633 static int gpt_add_partition(
1634 struct fdisk_context *cxt,
1635 size_t partnum,
1636 struct fdisk_parttype *t)
1637 {
1638 uint64_t user_f, user_l; /* user input ranges for first and last sectors */
1639 uint64_t disk_f, disk_l; /* first and last available sector ranges on device*/
1640 uint64_t dflt_f, dflt_l; /* largest segment (default) */
1641 struct gpt_guid typeid;
1642 struct fdisk_gpt_label *gpt;
1643 struct gpt_header *pheader;
1644 struct gpt_entry *ents;
1645 struct fdisk_ask *ask = NULL;
1646 int rc;
1647
1648 assert(cxt);
1649 assert(cxt->label);
1650 assert(fdisk_is_disklabel(cxt, GPT));
1651
1652 gpt = self_label(cxt);
1653
1654 if (partnum >= cxt->label->nparts_max)
1655 return -EINVAL;
1656
1657 pheader = gpt->pheader;
1658 ents = gpt->ents;
1659
1660 if (!partition_unused(&ents[partnum])) {
1661 fdisk_warnx(cxt, _("Partition %zd is already defined. "
1662 "Delete it before re-adding it."), partnum +1);
1663 return -EINVAL;
1664 }
1665 if (le32_to_cpu(pheader->npartition_entries) ==
1666 partitions_in_use(pheader, ents)) {
1667 fdisk_warnx(cxt, _("All partitions are already in use."));
1668 return -EINVAL;
1669 }
1670
1671 if (!get_free_sectors(cxt, pheader, ents, NULL, NULL)) {
1672 fdisk_warnx(cxt, _("No free sectors available."));
1673 return -ENOSPC;
1674 }
1675
1676 disk_f = find_first_available(pheader, ents, 0);
1677 disk_l = find_last_free_sector(pheader, ents);
1678
1679 /* the default is the largest free space */
1680 dflt_f = find_first_in_largest(pheader, ents);
1681 dflt_l = find_last_free(pheader, ents, dflt_f);
1682
1683 /* align the default in range <dflt_f,dflt_l>*/
1684 dflt_f = fdisk_align_lba_in_range(cxt, dflt_f, dflt_f, dflt_l);
1685
1686 string_to_guid(t && t->typestr ? t->typestr : GPT_DEFAULT_ENTRY_TYPE, &typeid);
1687
1688 /* get user input for first and last sectors of the new partition */
1689 for (;;) {
1690 if (!ask)
1691 ask = fdisk_new_ask();
1692 else
1693 fdisk_reset_ask(ask);
1694
1695 /* First sector */
1696 fdisk_ask_set_query(ask, _("First sector"));
1697 fdisk_ask_set_type(ask, FDISK_ASKTYPE_NUMBER);
1698 fdisk_ask_number_set_low(ask, disk_f); /* minimal */
1699 fdisk_ask_number_set_default(ask, dflt_f); /* default */
1700 fdisk_ask_number_set_high(ask, disk_l); /* maximal */
1701
1702 rc = fdisk_do_ask(cxt, ask);
1703 if (rc)
1704 goto done;
1705
1706 user_f = fdisk_ask_number_get_result(ask);
1707 if (user_f != find_first_available(pheader, ents, user_f)) {
1708 fdisk_warnx(cxt, _("Sector %ju already used."), user_f);
1709 continue;
1710 }
1711
1712 fdisk_reset_ask(ask);
1713
1714 /* Last sector */
1715 dflt_l = find_last_free(pheader, ents, user_f);
1716
1717 fdisk_ask_set_query(ask, _("Last sector, +sectors or +size{K,M,G,T,P}"));
1718 fdisk_ask_set_type(ask, FDISK_ASKTYPE_OFFSET);
1719 fdisk_ask_number_set_low(ask, user_f); /* minimal */
1720 fdisk_ask_number_set_default(ask, dflt_l); /* default */
1721 fdisk_ask_number_set_high(ask, dflt_l); /* maximal */
1722 fdisk_ask_number_set_base(ask, user_f); /* base for relative input */
1723 fdisk_ask_number_set_unit(ask, cxt->sector_size);
1724
1725 rc = fdisk_do_ask(cxt, ask);
1726 if (rc)
1727 goto done;
1728
1729 user_l = fdisk_ask_number_get_result(ask);
1730 if (fdisk_ask_number_is_relative(ask))
1731 user_l = fdisk_align_lba_in_range(cxt, user_l, user_f, dflt_l) - 1;
1732 if (user_l > user_f && user_l <= disk_l)
1733 break;
1734 }
1735
1736 if (gpt_create_new_partition(cxt, partnum,
1737 user_f, user_l, &typeid, ents) != 0)
1738 fdisk_warnx(cxt, _("Could not create partition %zd"), partnum + 1);
1739 else {
1740 struct fdisk_parttype *t;
1741
1742 cxt->label->nparts_cur++;
1743 fdisk_label_set_changed(cxt->label, 1);
1744
1745 t = gpt_get_partition_type(cxt, partnum);
1746 fdisk_info_new_partition(cxt, partnum + 1, user_f, user_l, t);
1747 fdisk_free_parttype(t);
1748 }
1749
1750 rc = 0;
1751 done:
1752 fdisk_free_ask(ask);
1753 return rc;
1754 }
1755
1756 /*
1757 * Create a new GPT disklabel - destroys any previous data.
1758 */
1759 static int gpt_create_disklabel(struct fdisk_context *cxt)
1760 {
1761 int rc = 0;
1762 ssize_t esz = 0;
1763 char str[37];
1764 struct fdisk_gpt_label *gpt;
1765
1766 assert(cxt);
1767 assert(cxt->label);
1768 assert(fdisk_is_disklabel(cxt, GPT));
1769
1770 gpt = self_label(cxt);
1771
1772 /* label private stuff has to be empty, see gpt_deinit() */
1773 assert(gpt->pheader == NULL);
1774 assert(gpt->bheader == NULL);
1775
1776 /*
1777 * When no header, entries or pmbr is set, we're probably
1778 * dealing with a new, empty disk - so always allocate memory
1779 * to deal with the data structures whatever the case is.
1780 */
1781 rc = gpt_mknew_pmbr(cxt);
1782 if (rc < 0)
1783 goto done;
1784
1785 /* primary */
1786 gpt->pheader = calloc(1, sizeof(*gpt->pheader));
1787 if (!gpt->pheader) {
1788 rc = -ENOMEM;
1789 goto done;
1790 }
1791 rc = gpt_mknew_header(cxt, gpt->pheader, GPT_PRIMARY_PARTITION_TABLE_LBA);
1792 if (rc < 0)
1793 goto done;
1794
1795 /* backup ("copy" primary) */
1796 gpt->bheader = calloc(1, sizeof(*gpt->bheader));
1797 if (!gpt->bheader) {
1798 rc = -ENOMEM;
1799 goto done;
1800 }
1801 rc = gpt_mknew_header_from_bkp(cxt, gpt->bheader,
1802 last_lba(cxt), gpt->pheader);
1803 if (rc < 0)
1804 goto done;
1805
1806 esz = le32_to_cpu(gpt->pheader->npartition_entries) *
1807 le32_to_cpu(gpt->pheader->sizeof_partition_entry);
1808 gpt->ents = calloc(1, esz);
1809 if (!gpt->ents) {
1810 rc = -ENOMEM;
1811 goto done;
1812 }
1813 gpt_recompute_crc(gpt->pheader, gpt->ents);
1814 gpt_recompute_crc(gpt->bheader, gpt->ents);
1815
1816 cxt->label->nparts_max = le32_to_cpu(gpt->pheader->npartition_entries);
1817 cxt->label->nparts_cur = 0;
1818
1819 guid_to_string(&gpt->pheader->disk_guid, str);
1820 fdisk_label_set_changed(cxt->label, 1);
1821 fdisk_sinfo(cxt, FDISK_INFO_SUCCESS,
1822 _("Created a new GPT disklabel (GUID: %s)."), str);
1823 done:
1824 return rc;
1825 }
1826
1827 static int gpt_get_disklabel_id(struct fdisk_context *cxt, char **id)
1828 {
1829 struct fdisk_gpt_label *gpt;
1830 char str[37];
1831
1832 assert(cxt);
1833 assert(id);
1834 assert(cxt->label);
1835 assert(fdisk_is_disklabel(cxt, GPT));
1836
1837 gpt = self_label(cxt);
1838 guid_to_string(&gpt->pheader->disk_guid, str);
1839
1840 *id = strdup(str);
1841 if (!*id)
1842 return -ENOMEM;
1843 return 0;
1844 }
1845
1846 static int gpt_set_disklabel_id(struct fdisk_context *cxt)
1847 {
1848 struct fdisk_gpt_label *gpt;
1849 struct gpt_guid uuid;
1850 char *str, *old, *new;
1851 int rc;
1852
1853 assert(cxt);
1854 assert(cxt->label);
1855 assert(fdisk_is_disklabel(cxt, GPT));
1856
1857 gpt = self_label(cxt);
1858 if (fdisk_ask_string(cxt,
1859 _("Enter new disk UUID (in 8-4-4-4-12 format)"), &str))
1860 return -EINVAL;
1861
1862 rc = string_to_guid(str, &uuid);
1863 free(str);
1864
1865 if (rc) {
1866 fdisk_warnx(cxt, _("Failed to parse your UUID."));
1867 return rc;
1868 }
1869
1870 gpt_get_disklabel_id(cxt, &old);
1871
1872 gpt->pheader->disk_guid = uuid;
1873 gpt->bheader->disk_guid = uuid;
1874
1875 gpt_recompute_crc(gpt->pheader, gpt->ents);
1876 gpt_recompute_crc(gpt->bheader, gpt->ents);
1877
1878 gpt_get_disklabel_id(cxt, &new);
1879
1880 fdisk_sinfo(cxt, FDISK_INFO_SUCCESS,
1881 _("Disk identifier changed from %s to %s."), old, new);
1882
1883 free(old);
1884 free(new);
1885 fdisk_label_set_changed(cxt->label, 1);
1886 return 0;
1887 }
1888
1889
1890 static struct fdisk_parttype *gpt_get_partition_type(
1891 struct fdisk_context *cxt,
1892 size_t i)
1893 {
1894 struct fdisk_parttype *t;
1895 char str[37];
1896 struct fdisk_gpt_label *gpt;
1897
1898 assert(cxt);
1899 assert(cxt->label);
1900 assert(fdisk_is_disklabel(cxt, GPT));
1901
1902 gpt = self_label(cxt);
1903
1904 if ((uint32_t) i >= le32_to_cpu(gpt->pheader->npartition_entries))
1905 return NULL;
1906
1907 guid_to_string(&gpt->ents[i].type, str);
1908 t = fdisk_get_parttype_from_string(cxt, str);
1909 if (!t)
1910 t = fdisk_new_unknown_parttype(0, str);
1911
1912 return t;
1913 }
1914
1915
1916 static int gpt_set_partition_type(
1917 struct fdisk_context *cxt,
1918 size_t i,
1919 struct fdisk_parttype *t)
1920 {
1921 struct gpt_guid uuid;
1922 struct fdisk_gpt_label *gpt;
1923
1924 assert(cxt);
1925 assert(cxt->label);
1926 assert(fdisk_is_disklabel(cxt, GPT));
1927
1928 gpt = self_label(cxt);
1929 if ((uint32_t) i >= le32_to_cpu(gpt->pheader->npartition_entries)
1930 || !t || !t->typestr || string_to_guid(t->typestr, &uuid) != 0)
1931 return -EINVAL;
1932
1933 gpt_entry_set_type(&gpt->ents[i], &uuid);
1934 gpt_recompute_crc(gpt->pheader, gpt->ents);
1935 gpt_recompute_crc(gpt->bheader, gpt->ents);
1936
1937 fdisk_label_set_changed(cxt->label, 1);
1938 return 0;
1939 }
1940
1941 static int gpt_get_partition_status(
1942 struct fdisk_context *cxt,
1943 size_t i,
1944 int *status)
1945 {
1946 struct fdisk_gpt_label *gpt;
1947 struct gpt_entry *e;
1948
1949 assert(cxt);
1950 assert(cxt->label);
1951 assert(fdisk_is_disklabel(cxt, GPT));
1952
1953 gpt = self_label(cxt);
1954
1955 if (!status || (uint32_t) i >= le32_to_cpu(gpt->pheader->npartition_entries))
1956 return -EINVAL;
1957
1958 e = &gpt->ents[i];
1959 *status = FDISK_PARTSTAT_NONE;
1960
1961 if (!partition_unused(e) || gpt_partition_start(e))
1962 *status = FDISK_PARTSTAT_USED;
1963
1964 return 0;
1965 }
1966
1967 int fdisk_gpt_partition_set_uuid(struct fdisk_context *cxt, size_t i)
1968 {
1969 struct fdisk_gpt_label *gpt;
1970 struct gpt_entry *e;
1971 struct gpt_guid uuid;
1972 char *str, new_u[37], old_u[37];
1973 int rc;
1974
1975 assert(cxt);
1976 assert(cxt->label);
1977 assert(fdisk_is_disklabel(cxt, GPT));
1978
1979 DBG(LABEL, dbgprint("UUID change requested partno=%zd", i));
1980
1981 gpt = self_label(cxt);
1982
1983 if ((uint32_t) i >= le32_to_cpu(gpt->pheader->npartition_entries))
1984 return -EINVAL;
1985
1986 if (fdisk_ask_string(cxt,
1987 _("New UUID (in 8-4-4-4-12 format)"), &str))
1988 return -EINVAL;
1989
1990 rc = string_to_guid(str, &uuid);
1991 free(str);
1992
1993 if (rc) {
1994 fdisk_warnx(cxt, _("Failed to parse your UUID."));
1995 return rc;
1996 }
1997
1998 e = &gpt->ents[i];
1999
2000 guid_to_string(&e->partition_guid, old_u);
2001 guid_to_string(&uuid, new_u);
2002
2003 e->partition_guid = uuid;
2004 gpt_recompute_crc(gpt->pheader, gpt->ents);
2005 gpt_recompute_crc(gpt->bheader, gpt->ents);
2006 fdisk_label_set_changed(cxt->label, 1);
2007
2008 fdisk_sinfo(cxt, FDISK_INFO_SUCCESS,
2009 _("Partition UUID changed from %s to %s."),
2010 old_u, new_u);
2011 return 0;
2012 }
2013
2014 int fdisk_gpt_partition_set_name(struct fdisk_context *cxt, size_t i)
2015 {
2016 struct fdisk_gpt_label *gpt;
2017 struct gpt_entry *e;
2018 char *str, *old, name[GPT_PART_NAME_LEN] = { 0 };
2019 size_t sz;
2020
2021 assert(cxt);
2022 assert(cxt->label);
2023 assert(fdisk_is_disklabel(cxt, GPT));
2024
2025 DBG(LABEL, dbgprint("NAME change requested partno=%zd", i));
2026
2027 gpt = self_label(cxt);
2028
2029 if ((uint32_t) i >= le32_to_cpu(gpt->pheader->npartition_entries))
2030 return -EINVAL;
2031
2032 if (fdisk_ask_string(cxt, _("New name"), &str))
2033 return -EINVAL;
2034
2035 e = &gpt->ents[i];
2036 old = encode_to_utf8((unsigned char *)e->name, sizeof(e->name));
2037
2038 sz = strlen(str);
2039 if (sz) {
2040 if (sz > GPT_PART_NAME_LEN)
2041 sz = GPT_PART_NAME_LEN;
2042 memcpy(name, str, sz);
2043 }
2044
2045 for (i = 0; i < GPT_PART_NAME_LEN; i++)
2046 e->name[i] = cpu_to_le16((uint16_t) name[i]);
2047
2048 gpt_recompute_crc(gpt->pheader, gpt->ents);
2049 gpt_recompute_crc(gpt->bheader, gpt->ents);
2050
2051 fdisk_label_set_changed(cxt->label, 1);
2052
2053 fdisk_sinfo(cxt, FDISK_INFO_SUCCESS,
2054 _("Partition name changed from '%s' to '%.*s'."),
2055 old, GPT_PART_NAME_LEN, str);
2056 free(str);
2057 free(old);
2058
2059 return 0;
2060 }
2061
2062
2063 /*
2064 * Deinitialize fdisk-specific variables
2065 */
2066 static void gpt_deinit(struct fdisk_label *lb)
2067 {
2068 struct fdisk_gpt_label *gpt = (struct fdisk_gpt_label *) lb;
2069
2070 if (!gpt)
2071 return;
2072
2073 free(gpt->ents);
2074 free(gpt->pheader);
2075 free(gpt->bheader);
2076
2077 gpt->ents = NULL;
2078 gpt->pheader = NULL;
2079 gpt->bheader = NULL;
2080 }
2081
2082 static const struct fdisk_label_operations gpt_operations =
2083 {
2084 .probe = gpt_probe_label,
2085 .write = gpt_write_disklabel,
2086 .verify = gpt_verify_disklabel,
2087 .create = gpt_create_disklabel,
2088 .list = gpt_list_disklabel,
2089 .locate = gpt_locate_disklabel,
2090 .get_id = gpt_get_disklabel_id,
2091 .set_id = gpt_set_disklabel_id,
2092
2093 .part_add = gpt_add_partition,
2094 .part_delete = gpt_delete_partition,
2095 .part_get_type = gpt_get_partition_type,
2096 .part_set_type = gpt_set_partition_type,
2097
2098 .part_get_status = gpt_get_partition_status,
2099
2100 .deinit = gpt_deinit
2101 };
2102
2103 /*
2104 * allocates GPT in-memory stuff
2105 */
2106 struct fdisk_label *fdisk_new_gpt_label(struct fdisk_context *cxt)
2107 {
2108 struct fdisk_label *lb;
2109 struct fdisk_gpt_label *gpt;
2110
2111 assert(cxt);
2112
2113 gpt = calloc(1, sizeof(*gpt));
2114 if (!gpt)
2115 return NULL;
2116
2117 /* initialize generic part of the driver */
2118 lb = (struct fdisk_label *) gpt;
2119 lb->name = "gpt";
2120 lb->id = FDISK_DISKLABEL_GPT;
2121 lb->op = &gpt_operations;
2122 lb->parttypes = gpt_parttypes;
2123 lb->nparttypes = ARRAY_SIZE(gpt_parttypes);
2124
2125 return lb;
2126 }
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