gpt.c revision 1.4
1/* $NetBSD: gpt.c,v 1.4 2019/07/26 08:18:47 martin Exp $ */ 2 3/* 4 * Copyright 2018 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY PIERMONT INFORMATION SYSTEMS INC. ``AS IS'' 17 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL PIERMONT INFORMATION SYSTEMS INC. BE 20 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 21 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 22 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 23 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 24 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 25 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF 26 * THE POSSIBILITY OF SUCH DAMAGE. 27 * 28 */ 29 30#include "defs.h" 31#include "mbr.h" 32#include "md.h" 33#include "gpt_uuid.h" 34#include <assert.h> 35#include <paths.h> 36#include <sys/param.h> 37#include <sys/ioctl.h> 38#include <util.h> 39 40bool gpt_parts_check(void); /* check for needed binaries */ 41 42 43/*************** GPT ************************************************/ 44/* a GPT based disk_partitions interface */ 45 46#define GUID_STR_LEN 40 47#define GPT_PTYPE_MAX 32 /* should be > gpt type -l | wc -l */ 48#define GPT_DEV_LEN 16 /* dkNN */ 49 50#define GPT_PARTS_PER_SEC 4 /* a 512 byte sector hols 4 entries */ 51#define GPT_DEFAULT_MAX_PARTS 128 52 53/* a usable label will be short, so we can get away with an arbitrary limit */ 54#define GPT_LABEL_LEN 96 55 56#define GPT_ATTR_BIOSBOOT 1 57#define GPT_ATTR_BOOTME 2 58#define GPT_ATTR_BOOTONCE 4 59#define GPT_ATTR_BOOTFAILED 8 60#define GPT_ATTR_NOBLOCKIO 16 61#define GPT_ATTR_REQUIRED 32 62 63/* when we don't care for BIOS or UEFI boot, use the combined boot flags */ 64#define GPT_ATTR_BOOT (GPT_ATTR_BIOSBOOT|GPT_ATTR_BOOTME) 65 66struct gpt_attr_desc { 67 const char *name; 68 uint flag; 69}; 70static const struct gpt_attr_desc gpt_avail_attrs[] = { 71 { "biosboot", GPT_ATTR_BIOSBOOT }, 72 { "bootme", GPT_ATTR_BOOTME }, 73 { "bootonce", GPT_ATTR_BOOTONCE }, 74 { "bootfailed", GPT_ATTR_BOOTFAILED }, 75 { "noblockio", GPT_ATTR_NOBLOCKIO }, 76 { "required", GPT_ATTR_REQUIRED }, 77 { NULL, 0 } 78}; 79 80struct gpt_ptype_desc { 81 struct part_type_desc gent; 82 char tid[GUID_STR_LEN]; 83 uint fsflags, default_fs_type; 84}; 85 86static const 87struct { 88 const char *name; 89 uint fstype; 90 enum part_type ptype; 91 uint fsflags; 92} gpt_fs_types[] = { 93 { .name = "ffs", .fstype = FS_BSDFFS, .ptype = PT_root, 94 .fsflags = GLM_LIKELY_FFS }, 95 { .name = "swap", .fstype = FS_SWAP, .ptype = PT_swap }, 96 { .name = "windows", .fstype = FS_MSDOS, .ptype = PT_FAT, 97 .fsflags = GLM_MAYBE_FAT32|GLM_MAYBE_NTFS }, 98 { .name = "windows", .fstype = FS_NTFS, .ptype = PT_FAT, 99 .fsflags = GLM_MAYBE_FAT32|GLM_MAYBE_NTFS }, 100 { .name = "efi", .fstype = FS_MSDOS, .ptype = PT_EFI_SYSTEM, 101 .fsflags = GLM_MAYBE_FAT32 }, 102 { .name = "bios", .fstype = FS_MSDOS, .ptype = PT_FAT, 103 .fsflags = GLM_MAYBE_FAT32 }, 104 { .name = "lfs", .fstype = FS_BSDLFS, .ptype = PT_root }, 105 { .name = "linux-data", .fstype = FS_EX2FS, .ptype = PT_root }, 106 { .name = "apple", .fstype = FS_HFS, .ptype = PT_unknown }, 107 { .name = "ccd", .fstype = FS_CCD, .ptype = PT_unknown }, 108 { .name = "cgd", .fstype = FS_CGD, .ptype = PT_unknown }, 109 { .name = "raid", .fstype = FS_RAID, .ptype = PT_root }, 110 { .name = "vmcore", .fstype = FS_VMKCORE, .ptype = PT_unknown }, 111 { .name = "vmfs", .fstype = FS_VMFS, .ptype = PT_unknown }, 112 { .name = "vmresered", .fstype = FS_VMWRESV, .ptype = PT_unknown } 113}; 114 115static size_t gpt_ptype_cnt; 116static struct gpt_ptype_desc gpt_ptype_descs[GPT_PTYPE_MAX]; 117 118/* similar to struct gpt_ent, but matching our needs */ 119struct gpt_part_entry { 120 const struct gpt_ptype_desc *gp_type; 121 char gp_id[GUID_STR_LEN]; /* partition guid as string */ 122 daddr_t gp_start, gp_size; 123 uint gp_attr; /* various attribute bits */ 124 char gp_label[GPT_LABEL_LEN]; /* user defined label */ 125 char gp_dev_name[GPT_DEV_LEN]; /* name of wedge */ 126 const char *last_mounted; /* last mounted if known */ 127 uint fs_type, fs_sub_type; /* FS_* and maybe sub type */ 128 uint gp_flags; 129#define GPEF_ON_DISK 1 /* This entry exists on-disk */ 130#define GPEF_MODIFIED 2 /* this entry has been changed */ 131#define GPEF_WEDGE 4 /* wedge for this exists */ 132#define GPEF_RESIZED 8 /* size has changed */ 133 struct gpt_part_entry *gp_next; 134}; 135 136static const struct gpt_ptype_desc *gpt_find_native_type( 137 const struct part_type_desc *gent); 138static const struct gpt_ptype_desc *gpt_find_guid_type(const char*); 139static bool 140gpt_info_to_part(struct gpt_part_entry *p, const struct disk_part_info *info, 141 const char **err_msg); 142 143const struct disk_partitioning_scheme gpt_parts; 144struct gpt_disk_partitions { 145 struct disk_partitions dp; 146 /* 147 * We keep a list of our current valid partitions, pointed 148 * to by "partitions". 149 * dp.num_part is the number of entries in "partitions". 150 * When partitions that have a representation on disk already 151 * are deleted, we move them to the "obsolete" list so we 152 * can issue the proper commands to remove it when writing back. 153 */ 154 struct gpt_part_entry *partitions, /* current partitions */ 155 *obsolete; /* deleted partitions */ 156 size_t max_num_parts; /* how many entries max? */ 157 size_t prologue, epilogue; /* number of sectors res. */ 158 bool has_gpt; /* disk already has a GPT */ 159}; 160 161/* 162 * Init global variables from MD details 163 */ 164static void 165gpt_md_init(bool is_boot_disk, size_t *max_parts, size_t *head, size_t *tail) 166{ 167 size_t num; 168 169 if (is_boot_disk) { 170#ifdef MD_GPT_INITIAL_SIZE 171#if MD_GPT_INITIAL_SIZE < 2*512 172#error impossible small GPT prologue 173#endif 174 num = ((MD_GPT_INITIAL_SIZE-(2*512))/512)*GPT_PARTS_PER_SEC; 175#else 176 num = GPT_DEFAULT_MAX_PARTS; 177#endif 178 } else { 179 num = GPT_DEFAULT_MAX_PARTS; 180 } 181 *max_parts = num; 182 *head = 2 + num/GPT_PARTS_PER_SEC; 183 *tail = 1 + num/GPT_PARTS_PER_SEC; 184} 185 186/* 187 * Parse a part of "gpt show" output into a struct gpt_part_entry. 188 * Output is from "show -a" format if details = false, otherwise 189 * from details for a specific partition (show -i or show -b) 190 */ 191static void 192gpt_add_info(struct gpt_part_entry *part, const char *tag, char *val, 193 bool details) 194{ 195 char *s, *e; 196 197 if (details && strcmp(tag, "Start:") == 0) { 198 part->gp_start = strtouq(val, NULL, 10); 199 } else if (details && strcmp(tag, "Size:") == 0) { 200 part->gp_size = strtouq(val, NULL, 10); 201 } else if (details && strcmp(tag, "Type:") == 0) { 202 s = strchr(val, '('); 203 if (!s) 204 return; 205 e = strchr(s, ')'); 206 if (!e) 207 return; 208 *e = 0; 209 part->gp_type = gpt_find_guid_type(s+1); 210 } else if (strcmp(tag, "TypeID:") == 0) { 211 part->gp_type = gpt_find_guid_type(val); 212 } else if (strcmp(tag, "GUID:") == 0) { 213 strlcpy(part->gp_id, val, sizeof(part->gp_id)); 214 } else if (strcmp(tag, "Label:") == 0) { 215 if (strlen(val) > 0) 216 strlcpy(part->gp_label, val, sizeof(part->gp_label)); 217 } else if (strcmp(tag, "Attributes:") == 0) { 218 char *n; 219 220 while ((n = strsep(&val, ", ")) != NULL) { 221 if (*n == 0) 222 continue; 223 for (const struct gpt_attr_desc *p = gpt_avail_attrs; 224 p->name != NULL; p++) { 225 if (strcmp(p->name, n) == 0) 226 part->gp_attr |= p->flag; 227 } 228 } 229 } 230} 231 232static struct disk_partitions * 233gpt_read_from_disk(const char *dev, daddr_t start, daddr_t len) 234{ 235 char diskpath[MAXPATHLEN]; 236 int fd; 237 238 assert(start == 0); 239 assert(have_gpt); 240 241 if (run_program(RUN_SILENT | RUN_ERROR_OK, 242 "gpt -rq header %s", dev) != 0) 243 return NULL; 244 245 /* read the partitions */ 246 int i; 247 unsigned int p_index; 248 daddr_t p_start = 0, p_size = 0, avail_start = 0, avail_size = 0, 249 disk_size = 0; 250 char *textbuf, *t, *tt, p_type[STRSIZE]; 251 static const char regpart_prefix[] = "GPT part - "; 252 struct gpt_disk_partitions *parts; 253 struct gpt_part_entry *last = NULL, *add_to = NULL; 254 255 if (collect(T_OUTPUT, &textbuf, "gpt -r show -a %s 2>/dev/null", dev) 256 < 1) 257 return NULL; 258 259 /* parse output and create our list */ 260 parts = calloc(1, sizeof(*parts)); 261 if (parts == NULL) 262 return NULL; 263 264 (void)strtok(textbuf, "\n"); /* ignore first line */ 265 while ((t = strtok(NULL, "\n")) != NULL) { 266 i = 0; p_start = 0; p_size = 0; p_index = 0; 267 p_type[0] = 0; 268 while ((tt = strsep(&t, " \t")) != NULL) { 269 if (strlen(tt) == 0) 270 continue; 271 if (i == 0) { 272 if (add_to != NULL) 273 gpt_add_info(add_to, tt, t, false); 274 p_start = strtouq(tt, NULL, 10); 275 if (p_start == 0 && add_to != NULL) 276 break; 277 else 278 add_to = NULL; 279 } 280 if (i == 1) 281 p_size = strtouq(tt, NULL, 10); 282 if (i == 2) 283 p_index = strtouq(tt, NULL, 10); 284 if (i > 2 || (i == 2 && p_index == 0)) { 285 if (p_type[0]) 286 strlcat(p_type, " ", STRSIZE); 287 strlcat(p_type, tt, STRSIZE); 288 } 289 i++; 290 } 291 292 if (p_start == 0 || p_size == 0) 293 continue; 294 else if (strcmp(p_type, "Pri GPT table") == 0) { 295 avail_start = p_start + p_size; 296 parts->prologue = avail_start; 297 parts->epilogue = p_size + 1; 298 parts->max_num_parts = p_size * GPT_PARTS_PER_SEC; 299 } else if (strcmp(p_type, "Sec GPT table") == 0) 300 avail_size = p_start - avail_start; 301 else if(strcmp(p_type, "Sec GPT header") == 0) 302 disk_size = p_start + p_size; 303 else if (p_index == 0 && strlen(p_type) > 0) 304 /* Utilitary entry (PMBR, etc) */ 305 continue; 306 else if (p_index == 0) { 307 /* Free space */ 308 continue; 309 } else { 310 /* Usual partition */ 311 tt = p_type; 312 if (strncmp(tt, regpart_prefix, 313 strlen(regpart_prefix)) == 0) 314 tt += strlen(regpart_prefix); 315 316 /* Add to our linked list */ 317 struct gpt_part_entry *np = calloc(1, sizeof(*np)); 318 if (np == NULL) 319 break; 320 321 strlcpy(np->gp_label, tt, sizeof(np->gp_label)); 322 np->gp_start = p_start; 323 np->gp_size = p_size; 324 np->gp_flags |= GPEF_ON_DISK; 325 326 if (last == NULL) 327 parts->partitions = np; 328 else 329 last->gp_next = np; 330 last = np; 331 add_to = np; 332 parts->dp.num_part++; 333 } 334 } 335 free(textbuf); 336 337 /* If the GPT was not complete (e.g. truncated image), barf */ 338 if (disk_size <= 0) { 339 free(parts); 340 return NULL; 341 } 342 343 parts->dp.pscheme = &gpt_parts; 344 parts->dp.disk = dev; 345 parts->dp.disk_start = start; 346 parts->dp.disk_size = disk_size; 347 parts->dp.free_space = avail_size; 348 parts->has_gpt = true; 349 350 fd = opendisk(parts->dp.disk, O_RDONLY, diskpath, sizeof(diskpath), 0); 351 for (struct gpt_part_entry *p = parts->partitions; p != NULL; 352 p = p->gp_next) { 353#ifdef DEFAULT_UFS2 354 bool fs_is_default = false; 355#endif 356 357 if (p->gp_type->fsflags != 0) { 358 const char *lm = get_last_mounted(fd, p->gp_start, 359 &p->fs_type, &p->fs_sub_type, p->gp_type->fsflags); 360 if (lm != NULL && *lm != 0) { 361 char *path = strdup(lm); 362 canonicalize_last_mounted(path); 363 p->last_mounted = path; 364 } else { 365 p->fs_type = p->gp_type->default_fs_type; 366#ifdef DEFAULT_UFS2 367 fs_is_default = true; 368#endif 369 } 370 } else { 371 p->fs_type = p->gp_type->default_fs_type; 372#ifdef DEFAULT_UFS2 373 fs_is_default = true; 374#endif 375 } 376#ifdef DEFAULT_UFS2 377 if (fs_is_default && p->fs_type == FS_BSDFFS) 378 p->fs_sub_type = 2; 379#endif 380 381 parts->dp.free_space -= p->gp_size; 382 } 383 close(fd); 384 385 return &parts->dp; 386} 387 388static struct disk_partitions * 389gpt_create_new(const char *disk, daddr_t start, daddr_t len, daddr_t total, 390 bool is_boot_drive) 391{ 392 struct gpt_disk_partitions *parts; 393 394 if (start != 0) { 395 assert(0); 396 return NULL; 397 } 398 399 parts = calloc(1, sizeof(*parts)); 400 if (!parts) 401 return NULL; 402 403 parts->dp.pscheme = &gpt_parts; 404 parts->dp.disk = disk; 405 406 gpt_md_init(is_boot_drive, &parts->max_num_parts, &parts->prologue, 407 &parts->epilogue); 408 409 parts->dp.disk_start = start; 410 parts->dp.disk_size = len; 411 parts->dp.free_space = len - start - parts->prologue - parts->epilogue; 412 parts->has_gpt = false; 413 414 return &parts->dp; 415} 416 417static bool 418gpt_get_part_info(const struct disk_partitions *arg, part_id id, 419 struct disk_part_info *info) 420{ 421 const struct gpt_disk_partitions *parts = 422 (const struct gpt_disk_partitions*)arg; 423 const struct gpt_part_entry *p = parts->partitions; 424 part_id no; 425 426 for (no = 0; p != NULL && no < id; no++) 427 p = p->gp_next; 428 429 if (no != id || p == NULL) 430 return false; 431 432 memset(info, 0, sizeof(*info)); 433 info->start = p->gp_start; 434 info->size = p->gp_size; 435 if (p->gp_type) 436 info->nat_type = &p->gp_type->gent; 437 info->last_mounted = p->last_mounted; 438 info->fs_type = p->fs_type; 439 info->fs_sub_type = p->fs_sub_type; 440 441 return true; 442} 443 444static bool 445gpt_get_part_attr_str(const struct disk_partitions *arg, part_id id, 446 char *str, size_t avail_space) 447{ 448 const struct gpt_disk_partitions *parts = 449 (const struct gpt_disk_partitions*)arg; 450 const struct gpt_part_entry *p = parts->partitions; 451 part_id no; 452 static const char *flags = NULL; 453 454 for (no = 0; p != NULL && no < id; no++) 455 p = p->gp_next; 456 457 if (no != id || p == NULL) 458 return false; 459 460 if (flags == NULL) 461 flags = msg_string(MSG_gpt_flags); 462 463 if (avail_space < 2) 464 return false; 465 466 if (p->gp_attr & GPT_ATTR_BOOT) 467 *str++ = flags[0]; 468 *str = 0; 469 470 return true; 471} 472 473/* 474 * Find insert position and check for duplicates. 475 * If all goes well, insert the new "entry" in the "list". 476 * If there are collisions, report "no free space". 477 * We keep all lists sorted by start sector number, 478 */ 479static bool 480gpt_insert_part_into_list(struct gpt_disk_partitions *parts, 481 struct gpt_part_entry **list, 482 struct gpt_part_entry *entry, const char **err_msg) 483{ 484 struct gpt_part_entry *p, *last; 485 486 /* find the first entry past the new one (if any) */ 487 for (last = NULL, p = *list; p != NULL; last = p, p = p->gp_next) { 488 if (p->gp_start > entry->gp_start) 489 break; 490 } 491 492 /* check if last partition overlaps with new one */ 493 if (last) { 494 if (last->gp_start + last->gp_size > entry->gp_start) { 495 if (err_msg) 496 *err_msg = msg_string(MSG_No_free_space); 497 return false; 498 } 499 } 500 501 if (p == NULL) { 502 entry->gp_next = NULL; 503 if (last != NULL) { 504 last->gp_next = entry; 505 } 506 } else { 507 /* check if new entry overlaps with next */ 508 if (entry->gp_start + entry->gp_size > p->gp_start) { 509 if (err_msg) 510 *err_msg = msg_string(MSG_No_free_space); 511 return false; 512 } 513 514 entry->gp_next = p; 515 if (last != NULL) 516 last->gp_next = entry; 517 else 518 *list = entry; 519 } 520 if (*list == NULL) 521 *list = entry; 522 523 return true; 524} 525 526static bool 527gpt_set_part_info(struct disk_partitions *arg, part_id id, 528 const struct disk_part_info *info, const char **err_msg) 529{ 530 struct gpt_disk_partitions *parts = 531 (struct gpt_disk_partitions*)arg; 532 struct gpt_part_entry *p = parts->partitions, *n; 533 part_id no; 534 daddr_t lendiff; 535 536 for (no = 0; p != NULL && no < id; no++) 537 p = p->gp_next; 538 539 if (no != id || p == NULL) 540 return false; 541 542 if ((p->gp_flags & GPEF_ON_DISK)) { 543 if (info->start != p->gp_start) { 544 /* partition moved, we need to delete and re-add */ 545 n = calloc(1, sizeof(*n)); 546 if (n == NULL) { 547 if (err_msg) 548 *err_msg = err_outofmem; 549 return false; 550 } 551 *n = *p; 552 p->gp_flags &= ~GPEF_ON_DISK; 553 if (!gpt_insert_part_into_list(parts, &parts->obsolete, 554 n, err_msg)) 555 return false; 556 } else if (info->size != p->gp_size) { 557 p->gp_flags |= GPEF_RESIZED; 558 } 559 } 560 561 p->gp_flags |= GPEF_MODIFIED; 562 563 lendiff = info->size - p->gp_size; 564 parts->dp.free_space -= lendiff; 565 return gpt_info_to_part(p, info, err_msg); 566} 567 568static size_t 569gpt_get_free_spaces_internal(const struct gpt_disk_partitions *parts, 570 struct disk_part_free_space *result, size_t max_num_result, 571 daddr_t min_space_size, daddr_t align, daddr_t start, daddr_t ignore) 572{ 573 size_t cnt = 0; 574 daddr_t s, e, from, size, end_of_disk; 575 struct gpt_part_entry *p; 576 577 if (align > 1) 578 start = max(roundup(start, align), align); 579 if (start < 0 || start < (daddr_t)parts->prologue) 580 start = parts->prologue; 581 if (parts->dp.disk_start != 0 && parts->dp.disk_start > start) 582 start = parts->dp.disk_start; 583 if (min_space_size < 1) 584 min_space_size = 1; 585 end_of_disk = parts->dp.disk_start + parts->dp.disk_size 586 - parts->epilogue; 587 from = start; 588 while (from < end_of_disk && cnt < max_num_result) { 589again: 590 size = parts->dp.disk_start + parts->dp.disk_size - from; 591 start = from; 592 if (start + size > end_of_disk) 593 size = end_of_disk - start; 594 for (p = parts->partitions; p != NULL; p = p->gp_next) { 595 s = p->gp_start; 596 e = p->gp_size + s; 597 if (s == ignore) 598 continue; 599 if (e < from) 600 continue; 601 if (s <= from && e > from) { 602 if (e - 1 >= end_of_disk) 603 return cnt; 604 from = e + 1; 605 if (align > 1) { 606 from = max(roundup(from, align), align); 607 if (from >= end_of_disk) { 608 size = 0; 609 break; 610 } 611 } 612 goto again; 613 } 614 if (s > from && s - from < size) { 615 size = s - from; 616 } 617 } 618 if (size >= min_space_size) { 619 result->start = start; 620 result->size = size; 621 result++; 622 cnt++; 623 } 624 from += size + 1; 625 if (align > 1) 626 from = max(roundup(from, align), align); 627 } 628 629 return cnt; 630} 631 632static daddr_t 633gpt_max_free_space_at(const struct disk_partitions *arg, daddr_t start) 634{ 635 const struct gpt_disk_partitions *parts = 636 (const struct gpt_disk_partitions*)arg; 637 struct disk_part_free_space space; 638 639 if (gpt_get_free_spaces_internal(parts, &space, 1, 1, 0, 640 start, start) == 1) 641 return space.size; 642 643 return 0; 644} 645 646static size_t 647gpt_get_free_spaces(const struct disk_partitions *arg, 648 struct disk_part_free_space *result, size_t max_num_result, 649 daddr_t min_space_size, daddr_t align, daddr_t start, 650 daddr_t ignore) 651{ 652 const struct gpt_disk_partitions *parts = 653 (const struct gpt_disk_partitions*)arg; 654 655 return gpt_get_free_spaces_internal(parts, result, 656 max_num_result, min_space_size, align, start, ignore); 657} 658 659 660static bool 661gpt_adapt(const struct disk_partitions *arg, 662 const struct disk_part_info *src, struct disk_part_info *dest) 663{ 664 /* slightly simplistic, enhance when needed */ 665 memcpy(dest, src, sizeof(*dest)); 666 667 if (src->nat_type == NULL) 668 return false; 669 670 dest->nat_type = arg->pscheme->get_generic_part_type( 671 src->nat_type->generic_ptype); 672 if (dest->nat_type == NULL) 673 dest->nat_type = arg->pscheme->get_generic_part_type( 674 PT_unknown); 675 676 return true; 677} 678 679static void 680gpt_match_ptype(const char *name, struct gpt_ptype_desc *t) 681{ 682 size_t i; 683 684 for (i = 0; i < __arraycount(gpt_fs_types); i++) { 685 if (strcmp(name, gpt_fs_types[i].name) == 0) { 686 t->gent.generic_ptype = gpt_fs_types[i].ptype; 687 t->fsflags = gpt_fs_types[i].fsflags; 688 t->default_fs_type = gpt_fs_types[i].fstype; 689 return; 690 } 691 } 692 693 t->gent.generic_ptype = PT_unknown; 694 t->fsflags = 0; 695 t->default_fs_type = FS_BSDFFS; 696} 697 698static void 699gpt_internal_add_ptype(const char *uid, const char *name, const char *desc) 700{ 701 strlcpy(gpt_ptype_descs[gpt_ptype_cnt].tid, uid, 702 sizeof(gpt_ptype_descs[gpt_ptype_cnt].tid)); 703 gpt_ptype_descs[gpt_ptype_cnt].gent.short_desc = name; 704 gpt_ptype_descs[gpt_ptype_cnt].gent.description = desc; 705 gpt_match_ptype(name, &gpt_ptype_descs[gpt_ptype_cnt]); 706 gpt_ptype_cnt++; 707} 708 709static void 710gpt_init_ptypes(void) 711{ 712 if (gpt_ptype_cnt == 0) 713 gpt_uuid_query(gpt_internal_add_ptype); 714} 715 716static size_t 717gpt_type_count(void) 718{ 719 if (gpt_ptype_cnt == 0) 720 gpt_init_ptypes(); 721 722 return gpt_ptype_cnt; 723} 724 725static const struct part_type_desc * 726gpt_get_ptype(size_t ndx) 727{ 728 if (gpt_ptype_cnt == 0) 729 gpt_init_ptypes(); 730 731 if (ndx >= gpt_ptype_cnt) 732 return NULL; 733 734 return &gpt_ptype_descs[ndx].gent; 735} 736 737static const struct part_type_desc * 738gpt_get_generic_type(enum part_type gent) 739{ 740 if (gpt_ptype_cnt == 0) 741 gpt_init_ptypes(); 742 743 for (size_t i = 0; i < gpt_ptype_cnt; i++) 744 if (gpt_ptype_descs[i].gent.generic_ptype == gent) 745 return &gpt_ptype_descs[i].gent; 746 747 return NULL; 748} 749 750static const struct gpt_ptype_desc * 751gpt_find_native_type(const struct part_type_desc *gent) 752{ 753 if (gpt_ptype_cnt == 0) 754 gpt_init_ptypes(); 755 756 if (gent == NULL) 757 return NULL; 758 759 for (size_t i = 0; i < gpt_ptype_cnt; i++) 760 if (gent == &gpt_ptype_descs[i].gent) 761 return &gpt_ptype_descs[i]; 762 763 gent = gpt_get_generic_type(gent->generic_ptype); 764 if (gent == NULL) 765 return NULL; 766 767 /* this can not recurse deeper than once, we would not have found a 768 * generic type a few lines above if it would. */ 769 return gpt_find_native_type(gent); 770} 771 772static const struct gpt_ptype_desc * 773gpt_find_guid_type(const char *uid) 774{ 775 if (gpt_ptype_cnt == 0) 776 gpt_init_ptypes(); 777 778 if (uid == NULL || uid[0] == 0) 779 return NULL; 780 781 for (size_t i = 0; i < gpt_ptype_cnt; i++) 782 if (strcmp(gpt_ptype_descs[i].tid, uid) == 0) 783 return &gpt_ptype_descs[i]; 784 785 return NULL; 786} 787 788static const struct part_type_desc * 789gpt_find_type(const char *desc) 790{ 791 if (gpt_ptype_cnt == 0) 792 gpt_init_ptypes(); 793 794 if (desc == NULL || desc[0] == 0) 795 return NULL; 796 797 for (size_t i = 0; i < gpt_ptype_cnt; i++) 798 if (strcmp(gpt_ptype_descs[i].gent.short_desc, desc) == 0) 799 return &gpt_ptype_descs[i].gent; 800 801 return NULL; 802} 803 804static const struct part_type_desc * 805gpt_get_fs_part_type(unsigned fstype, unsigned fs_sub_type) 806{ 807 size_t i; 808 809 for (i = 0; i < __arraycount(gpt_fs_types); i++) 810 if (fstype == gpt_fs_types[i].fstype) 811 return gpt_find_type(gpt_fs_types[i].name); 812 813 return gpt_get_generic_type(PT_root); 814} 815 816static daddr_t 817gpt_get_part_alignment(const struct disk_partitions *parts) 818{ 819 820 assert(parts->disk_size > 0); 821 if (parts->disk_size < 0) 822 return 1; 823 824 /* Use 1MB offset/alignemnt for large (>128GB) disks */ 825 if (parts->disk_size > HUGE_DISK_SIZE) 826 return 2048; 827 else if (parts->disk_size > TINY_DISK_SIZE) 828 return 64; 829 else 830 return 4; 831} 832 833static bool 834gpt_can_add_partition(const struct disk_partitions *arg) 835{ 836 const struct gpt_disk_partitions *parts = 837 (const struct gpt_disk_partitions*)arg; 838 struct disk_part_free_space space; 839 daddr_t align; 840 841 if (parts->dp.num_part >= parts->max_num_parts) 842 return false; 843 844 align = gpt_get_part_alignment(arg); 845 if (parts->dp.free_space <= align) 846 return false; 847 848 if (gpt_get_free_spaces_internal(parts, &space, 1, align, align, 849 0, -1) < 1) 850 return false; 851 852 return true; 853} 854 855static bool 856gpt_info_to_part(struct gpt_part_entry *p, const struct disk_part_info *info, 857 const char **err_msg) 858{ 859 p->gp_type = gpt_find_native_type(info->nat_type); 860 p->gp_start = info->start; 861 p->gp_size = info->size; 862 if (info->last_mounted != NULL && info->last_mounted != 863 p->last_mounted) { 864 free(__UNCONST(p->last_mounted)); 865 p->last_mounted = strdup(info->last_mounted); 866 } 867 p->fs_type = info->fs_type; 868 p->fs_sub_type = info->fs_sub_type; 869 870 return true; 871} 872 873static part_id 874gpt_add_part(struct disk_partitions *arg, 875 const struct disk_part_info *info, const char **err_msg) 876{ 877 struct gpt_disk_partitions *parts = 878 (struct gpt_disk_partitions*)arg; 879 struct disk_part_free_space space; 880 struct disk_part_info data = *info; 881 struct gpt_part_entry *p; 882 bool ok; 883 884 if (err_msg != NULL) 885 *err_msg = NULL; 886 887 if (gpt_get_free_spaces_internal(parts, &space, 1, 1, 1, 888 info->start, -1) < 1) { 889 if (err_msg) 890 *err_msg = msg_string(MSG_No_free_space); 891 return NO_PART; 892 } 893 if (parts->dp.num_part >= parts->max_num_parts) { 894 if (err_msg) 895 *err_msg = msg_string(MSG_err_too_many_partitions); 896 return NO_PART; 897 } 898 899 if (data.size > space.size) 900 data.size = space.size; 901 902 p = calloc(1, sizeof(*p)); 903 if (p == NULL) { 904 if (err_msg != NULL) 905 *err_msg = INTERNAL_ERROR; 906 return NO_PART; 907 } 908 if (!gpt_info_to_part(p, &data, err_msg)) { 909 free(p); 910 return NO_PART; 911 } 912 p->gp_flags |= GPEF_MODIFIED; 913 ok = gpt_insert_part_into_list(parts, &parts->partitions, p, err_msg); 914 if (ok) { 915 parts->dp.num_part++; 916 parts->dp.free_space -= p->gp_size; 917 return parts->dp.num_part-1; 918 } else { 919 free(p); 920 return NO_PART; 921 } 922} 923 924static bool 925gpt_delete_partition(struct disk_partitions *arg, part_id id, 926 const char **err_msg) 927{ 928 struct gpt_disk_partitions *parts = (struct gpt_disk_partitions*)arg; 929 struct gpt_part_entry *p, *last = NULL; 930 part_id i; 931 bool res; 932 933 if (parts->dp.num_part == 0) 934 return false; 935 936 for (i = 0, p = parts->partitions; 937 i != id && i < parts->dp.num_part && p != NULL; 938 i++, p = p->gp_next) 939 last = p; 940 941 if (p == NULL) { 942 if (err_msg) 943 *err_msg = INTERNAL_ERROR; 944 return false; 945 } 946 947 if (last == NULL) 948 parts->partitions = p->gp_next; 949 else 950 last->gp_next = p->gp_next; 951 952 res = true; 953 if (p->gp_flags & GPEF_ON_DISK) { 954 if (!gpt_insert_part_into_list(parts, &parts->obsolete, 955 p, err_msg)) 956 res = false; 957 } else { 958 free(p); 959 } 960 961 if (res) { 962 parts->dp.num_part--; 963 parts->dp.free_space += p->gp_size; 964 } 965 966 return res; 967} 968 969static bool 970gpt_delete_all_partitions(struct disk_partitions *arg) 971{ 972 struct gpt_disk_partitions *parts = (struct gpt_disk_partitions*)arg; 973 974 while (parts->dp.num_part > 0) { 975 if (!gpt_delete_partition(&parts->dp, 0, NULL)) 976 return false; 977 } 978 979 return true; 980} 981 982static bool 983gpt_read_part(const char *disk, daddr_t start, struct gpt_part_entry *p) 984{ 985 char *textbuf, *t, *tt; 986 static const char expected_hdr[] = "Details for index "; 987 988 /* run gpt show for this partition */ 989 if (collect(T_OUTPUT, &textbuf, 990 "gpt -r show -b %" PRIu64 " %s 2>/dev/null", start, disk) < 1) 991 return false; 992 993 /* 994 * gpt show should respond with single partition details, but will 995 * fall back to "show -a" output if something is wrong 996 */ 997 t = strtok(textbuf, "\n"); /* first line is special */ 998 if (strncmp(t, expected_hdr, sizeof(expected_hdr)-1) != 0) { 999 free(textbuf); 1000 return false; 1001 } 1002 1003 /* parse output into "old" */ 1004 while ((t = strtok(NULL, "\n")) != NULL) { 1005 tt = strsep(&t, " \t"); 1006 if (strlen(tt) == 0) 1007 continue; 1008 gpt_add_info(p, tt, t, true); 1009 } 1010 free(textbuf); 1011 1012 return true; 1013} 1014 1015static bool 1016gpt_apply_attr(const char *disk, const char *cmd, off_t start, uint todo) 1017{ 1018 size_t i; 1019 char attr_str[STRSIZE]; 1020 1021 if (todo == 0) 1022 return true; 1023 1024 strcpy(attr_str, "-a "); 1025 for (i = 0; todo != 0; i++) { 1026 if (!(gpt_avail_attrs[i].flag & todo)) 1027 continue; 1028 todo &= ~gpt_avail_attrs[i].flag; 1029 if (attr_str[0]) 1030 strlcat(attr_str, ",", 1031 sizeof(attr_str)); 1032 strlcat(attr_str, 1033 gpt_avail_attrs[i].name, 1034 sizeof(attr_str)); 1035 } 1036 if (run_program(RUN_SILENT, 1037 "gpt %s %s -b %" PRIu64 " %s", cmd, attr_str, start, disk) != 0) 1038 return false; 1039 return true; 1040} 1041 1042/* 1043 * Modify an existing on-disk partition. 1044 * Start and size can not be changed here, caller needs to deal 1045 * with that kind of changes upfront. 1046 */ 1047static bool 1048gpt_modify_part(const char *disk, struct gpt_part_entry *p) 1049{ 1050 struct gpt_part_entry old; 1051 uint todo_set, todo_unset; 1052 1053 /* 1054 * Query current on-disk state 1055 */ 1056 memset(&old, 0, sizeof old); 1057 if (!gpt_read_part(disk, p->gp_start, &old)) 1058 return false; 1059 1060 /* Reject unsupported changes */ 1061 if (old.gp_start != p->gp_start || old.gp_size != p->gp_size) 1062 return false; 1063 1064 /* 1065 * GUID should never change, but the internal copy 1066 * may not yet know it. 1067 */ 1068 strcpy(p->gp_id, old.gp_id); 1069 1070 /* Check type */ 1071 if (p->gp_type != old.gp_type) { 1072 if (run_program(RUN_SILENT, 1073 "gpt label -b %" PRIu64 " -T %s %s", 1074 p->gp_start, p->gp_type->tid, disk) != 0) 1075 return false; 1076 } 1077 1078 /* Check label */ 1079 if (strcmp(p->gp_label, old.gp_label) != 0) { 1080 if (run_program(RUN_SILENT, 1081 "gpt label -b %" PRIu64 " -l %s %s", 1082 p->gp_start, p->gp_label, disk) != 0) 1083 return false; 1084 } 1085 1086 /* Check attributes */ 1087 if (p->gp_attr != old.gp_attr) { 1088 if (p->gp_attr == 0) { 1089 if (run_program(RUN_SILENT, 1090 "gpt set -N -b %" PRIu64 " %s", 1091 p->gp_start, disk) != 0) 1092 return false; 1093 } else { 1094 todo_set = (p->gp_attr ^ old.gp_attr) & p->gp_attr; 1095 todo_unset = (p->gp_attr ^ old.gp_attr) & old.gp_attr; 1096 if (!gpt_apply_attr(disk, "unset", p->gp_start, 1097 todo_unset)) 1098 return false; 1099 if (!gpt_apply_attr(disk, "set", p->gp_start, 1100 todo_set)) 1101 return false; 1102 } 1103 } 1104 1105 return true; 1106} 1107 1108/* 1109 * verbatim copy from sys/dev/dkwedge/dkwedge_bsdlabel.c: 1110 * map FS_* to wedge strings 1111 */ 1112static const char * 1113bsdlabel_fstype_to_str(uint8_t fstype) 1114{ 1115 const char *str; 1116 1117 /* 1118 * For each type known to FSTYPE_DEFN (from <sys/disklabel.h>), 1119 * a suitable case branch will convert the type number to a string. 1120 */ 1121 switch (fstype) { 1122#define FSTYPE_TO_STR_CASE(tag, number, name, fsck, mount) \ 1123 case __CONCAT(FS_,tag): str = __CONCAT(DKW_PTYPE_,tag); break; 1124 FSTYPE_DEFN(FSTYPE_TO_STR_CASE) 1125#undef FSTYPE_TO_STR_CASE 1126 default: str = NULL; break; 1127 } 1128 1129 return (str); 1130} 1131 1132static bool 1133gpt_add_wedge(const char *disk, struct gpt_part_entry *p) 1134{ 1135 struct dkwedge_info dkw; 1136 const char *tname; 1137 char diskpath[MAXPATHLEN]; 1138 int fd; 1139 1140 memset(&dkw, 0, sizeof(dkw)); 1141 tname = bsdlabel_fstype_to_str(p->fs_type); 1142 if (tname) 1143 strlcpy(dkw.dkw_ptype, tname, sizeof(dkw.dkw_ptype)); 1144 1145 strlcpy((char*)&dkw.dkw_wname, p->gp_id, sizeof(dkw.dkw_wname)); 1146 dkw.dkw_offset = p->gp_start; 1147 dkw.dkw_size = p->gp_size; 1148 1149 fd = opendisk(disk, O_RDWR, diskpath, sizeof(diskpath), 0); 1150 if (fd < 0) 1151 return false; 1152 if (ioctl(fd, DIOCAWEDGE, &dkw) == -1) { 1153 close(fd); 1154 return false; 1155 } 1156 close(fd); 1157 1158 strlcpy(p->gp_dev_name, dkw.dkw_devname, sizeof(p->gp_dev_name)); 1159 p->gp_flags |= GPEF_WEDGE; 1160 return true; 1161} 1162 1163static bool 1164gpt_get_part_device(const struct disk_partitions *arg, 1165 part_id id, char *devname, size_t max_devname_len, int *part, 1166 enum dev_name_usage usage, bool with_path) 1167{ 1168 const struct gpt_disk_partitions *parts = 1169 (const struct gpt_disk_partitions*)arg; 1170 struct gpt_part_entry *p = parts->partitions; 1171 part_id no; 1172 1173 1174 for (no = 0; p != NULL && no < id; no++) 1175 p = p->gp_next; 1176 1177 if (no != id || p == NULL) 1178 return false; 1179 1180 if (part) 1181 *part = -1; 1182 1183 if (!(p->gp_flags & GPEF_WEDGE) && 1184 (usage == plain_name || usage == raw_dev_name)) 1185 gpt_add_wedge(arg->disk, p); 1186 1187 switch (usage) { 1188 case logical_name: 1189 if (p->gp_label[0] != 0) 1190 snprintf(devname, max_devname_len, 1191 "NAME=%s", p->gp_label); 1192 else 1193 snprintf(devname, max_devname_len, 1194 "NAME=%s", p->gp_id); 1195 break; 1196 case plain_name: 1197 assert(p->gp_flags & GPEF_WEDGE); 1198 if (with_path) 1199 snprintf(devname, max_devname_len, _PATH_DEV "%s", 1200 p->gp_dev_name); 1201 else 1202 strlcpy(devname, p->gp_dev_name, max_devname_len); 1203 break; 1204 case raw_dev_name: 1205 assert(p->gp_flags & GPEF_WEDGE); 1206 if (with_path) 1207 snprintf(devname, max_devname_len, _PATH_DEV "r%s", 1208 p->gp_dev_name); 1209 else 1210 snprintf(devname, max_devname_len, "r%s", 1211 p->gp_dev_name); 1212 break; 1213 default: 1214 return false; 1215 } 1216 1217 return true; 1218} 1219 1220static bool 1221gpt_write_to_disk(struct disk_partitions *arg) 1222{ 1223 struct gpt_disk_partitions *parts = (struct gpt_disk_partitions*)arg; 1224 struct gpt_part_entry *p, *n; 1225 char label_arg[sizeof(p->gp_label) + 4]; 1226 char diskpath[MAXPATHLEN]; 1227 int fd, bits = 0; 1228 bool root_is_new = false, efi_is_new = false; 1229 part_id root_id = NO_PART, efi_id = NO_PART, pno; 1230 1231 /* 1232 * Remove all wedges on this disk - they may become invalid and we 1233 * have no easy way to associate them with the partitioning data. 1234 * Instead we will explicitly request creation of wedges on demand 1235 * later. 1236 */ 1237 fd = opendisk(arg->disk, O_RDWR, diskpath, sizeof(diskpath), 0); 1238 if (fd < 0) 1239 return false; 1240 if (ioctl(fd, DIOCRMWEDGES, &bits) == -1) 1241 return false; 1242 close(fd); 1243 1244 /* 1245 * Mark all partitions as "have no wedge yet". While there, 1246 * collect first root and efi partition (if available) 1247 */ 1248 for (pno = 0, p = parts->partitions; p != NULL; p = p->gp_next, pno++) { 1249 p->gp_flags &= ~GPEF_WEDGE; 1250 if (root_id == NO_PART) { 1251 if (p->gp_type->gent.generic_ptype == PT_root && 1252 p->gp_start == pm->ptstart) { 1253 root_id = pno; 1254 root_is_new = !(p->gp_flags & GPEF_ON_DISK); 1255 } else if (efi_id == NO_PART && 1256 p->gp_type->gent.generic_ptype == PT_EFI_SYSTEM) { 1257 efi_id = pno; 1258 efi_is_new = !(p->gp_flags & GPEF_ON_DISK); 1259 } 1260 } 1261 } 1262 1263 /* 1264 * If no GPT on disk yet, create it. 1265 */ 1266 if (!parts->has_gpt) { 1267 char limit[30]; 1268 1269 if (parts->max_num_parts > 0) 1270 sprintf(limit, "-p %zu", parts->max_num_parts); 1271 else 1272 limit[0] = 0; 1273 if (run_program(RUN_SILENT, "gpt create %s %s", 1274 limit, parts->dp.disk)) 1275 return false; 1276 parts->has_gpt = true; 1277 } 1278 1279 /* 1280 * Delete all old partitions 1281 */ 1282 for (p = parts->obsolete; p != NULL; p = n) { 1283 run_program(RUN_SILENT, "gpt -n remove -b %" PRIu64 " %s", 1284 p->gp_start, arg->disk); 1285 n = p->gp_next; 1286 free(p); 1287 } 1288 parts->obsolete = NULL; 1289 1290 /* 1291 * Modify existing but changed partitions 1292 */ 1293 for (p = parts->partitions; p != NULL; p = p->gp_next) { 1294 if (!(p->gp_flags & GPEF_ON_DISK)) 1295 continue; 1296 1297 if (p->gp_flags & GPEF_RESIZED) { 1298 run_program(RUN_SILENT, 1299 "gpt -n resize -b %" PRIu64 " -s %" PRIu64 "s %s", 1300 p->gp_start, p->gp_size, arg->disk); 1301 p->gp_flags &= ~GPEF_RESIZED; 1302 } 1303 1304 if (!(p->gp_flags & GPEF_MODIFIED)) 1305 continue; 1306 1307 if (!gpt_modify_part(parts->dp.disk, p)) 1308 return false; 1309 } 1310 1311 /* 1312 * Add new partitions 1313 */ 1314 for (p = parts->partitions; p != NULL; p = p->gp_next) { 1315 if (p->gp_flags & GPEF_ON_DISK) 1316 continue; 1317 if (!(p->gp_flags & GPEF_MODIFIED)) 1318 continue; 1319 1320 if (p->gp_label[0] == 0) 1321 label_arg[0] = 0; 1322 else 1323 sprintf(label_arg, "-l %s", p->gp_label); 1324 1325 run_program(RUN_SILENT, 1326 "gpt -n add -b %" PRIu64 " -s %" PRIu64 "s -t %s %s %s", 1327 p->gp_start, p->gp_size, p->gp_type->tid, 1328 label_arg, arg->disk); 1329 gpt_apply_attr(arg->disk, "set", p->gp_start, p->gp_attr); 1330 gpt_read_part(arg->disk, p->gp_start, p); 1331 p->gp_flags |= GPEF_ON_DISK; 1332 } 1333 1334 /* 1335 * Additional MD bootloader magic... 1336 */ 1337 if (!md_gpt_post_write(&parts->dp, root_id, root_is_new, efi_id, 1338 efi_is_new)) 1339 return false; 1340 1341 return true; 1342} 1343 1344bool 1345gpt_parts_check(void) 1346{ 1347 1348 check_available_binaries(); 1349 1350 return have_gpt && have_dk; 1351} 1352 1353static void 1354gpt_free(struct disk_partitions *arg) 1355{ 1356 struct gpt_disk_partitions *parts = (struct gpt_disk_partitions*)arg; 1357 struct gpt_part_entry *p, *n; 1358 1359 assert(parts != NULL); 1360 for (p = parts->partitions; p != NULL; p = n) { 1361 free(__UNCONST(p->last_mounted)); 1362 n = p->gp_next; 1363 free(p); 1364 } 1365 free(parts); 1366} 1367 1368static bool 1369gpt_custom_attribute_writable(const struct disk_partitions *arg, 1370 part_id ptn, size_t attr_no) 1371{ 1372 const struct gpt_disk_partitions *parts = 1373 (const struct gpt_disk_partitions*)arg; 1374 size_t i; 1375 struct gpt_part_entry *p; 1376 1377 if (attr_no >= arg->pscheme->custom_attribute_count) 1378 return false; 1379 1380 const msg label = arg->pscheme->custom_attributes[attr_no].label; 1381 1382 /* we can not edit the uuid attribute */ 1383 if (label == MSG_ptn_uuid) 1384 return false; 1385 1386 /* the label is always editable */ 1387 if (label == MSG_ptn_label) 1388 return true; 1389 1390 /* the GPT type is read only */ 1391 if (label == MSG_ptn_gpt_type) 1392 return false; 1393 1394 /* BOOTME makes no sense on swap partitions */ 1395 for (i = 0, p = parts->partitions; p != NULL; i++, p = p->gp_next) 1396 if (i == ptn) 1397 break; 1398 1399 if (p == NULL) 1400 return false; 1401 1402 if (p->fs_type == FS_SWAP || p->gp_type->gent.generic_ptype == PT_swap) 1403 return false; 1404 1405 return true; 1406} 1407 1408static bool 1409gpt_format_custom_attribute(const struct disk_partitions *arg, 1410 part_id ptn, size_t attr_no, const struct disk_part_info *info, 1411 char *out, size_t out_space) 1412{ 1413 const struct gpt_disk_partitions *parts = 1414 (const struct gpt_disk_partitions*)arg; 1415 size_t i; 1416 struct gpt_part_entry *p, data; 1417 1418 for (i = 0, p = parts->partitions; p != NULL; i++, p = p->gp_next) 1419 if (i == ptn) 1420 break; 1421 1422 if (p == NULL) 1423 return false; 1424 1425 if (attr_no >= parts->dp.pscheme->custom_attribute_count) 1426 return false; 1427 1428 const msg label = parts->dp.pscheme->custom_attributes[attr_no].label; 1429 1430 if (info != NULL) { 1431 data = *p; 1432 gpt_info_to_part(&data, info, NULL); 1433 p = &data; 1434 } 1435 1436 if (label == MSG_ptn_label) 1437 strlcpy(out, p->gp_label, out_space); 1438 else if (label == MSG_ptn_uuid) 1439 strlcpy(out, p->gp_id, out_space); 1440 else if (label == MSG_ptn_gpt_type) 1441 strlcpy(out, p->gp_type->gent.description, out_space); 1442 else if (label == MSG_ptn_boot) 1443 strlcpy(out, msg_string(p->gp_attr & GPT_ATTR_BOOT ? 1444 MSG_Yes : MSG_No), out_space); 1445 else 1446 return false; 1447 1448 return true; 1449} 1450 1451static bool 1452gpt_custom_attribute_toggle(struct disk_partitions *arg, 1453 part_id ptn, size_t attr_no) 1454{ 1455 const struct gpt_disk_partitions *parts = 1456 (const struct gpt_disk_partitions*)arg; 1457 size_t i; 1458 struct gpt_part_entry *p; 1459 1460 for (i = 0, p = parts->partitions; p != NULL; i++, p = p->gp_next) 1461 if (i == ptn) 1462 break; 1463 1464 if (p == NULL) 1465 return false; 1466 1467 if (attr_no >= parts->dp.pscheme->custom_attribute_count) 1468 return false; 1469 1470 const msg label = parts->dp.pscheme->custom_attributes[attr_no].label; 1471 if (label != MSG_ptn_boot) 1472 return false; 1473 1474 if (p->gp_attr & GPT_ATTR_BOOT) { 1475 p->gp_attr &= ~GPT_ATTR_BOOT; 1476 } else { 1477 for (i = 0, p = parts->partitions; p != NULL; 1478 i++, p = p->gp_next) 1479 if (i == ptn) 1480 p->gp_attr |= GPT_ATTR_BOOT; 1481 else 1482 p->gp_attr &= ~GPT_ATTR_BOOT; 1483 } 1484 return true; 1485} 1486 1487static bool 1488gpt_custom_attribute_set_str(struct disk_partitions *arg, 1489 part_id ptn, size_t attr_no, const char *new_val) 1490{ 1491 const struct gpt_disk_partitions *parts = 1492 (const struct gpt_disk_partitions*)arg; 1493 size_t i; 1494 struct gpt_part_entry *p; 1495 1496 for (i = 0, p = parts->partitions; p != NULL; i++, p = p->gp_next) 1497 if (i == ptn) 1498 break; 1499 1500 if (p == NULL) 1501 return false; 1502 1503 if (attr_no >= parts->dp.pscheme->custom_attribute_count) 1504 return false; 1505 1506 const msg label = parts->dp.pscheme->custom_attributes[attr_no].label; 1507 1508 if (label != MSG_ptn_label) 1509 return false; 1510 1511 strlcpy(p->gp_label, new_val, sizeof(p->gp_label)); 1512 return true; 1513} 1514 1515static bool 1516gpt_have_boot_support(const char *disk) 1517{ 1518#ifdef HAVE_GPT_BOOT 1519 return true; 1520#else 1521 return false; 1522#endif 1523} 1524 1525const struct disk_part_custom_attribute gpt_custom_attrs[] = { 1526 { .label = MSG_ptn_label, .type = pet_str }, 1527 { .label = MSG_ptn_uuid, .type = pet_str }, 1528 { .label = MSG_ptn_gpt_type, .type = pet_str }, 1529 { .label = MSG_ptn_boot, .type = pet_bool }, 1530}; 1531 1532const struct disk_partitioning_scheme 1533gpt_parts = { 1534 .name = MSG_parttype_gpt, 1535 .short_name = MSG_parttype_gpt_short, 1536 .part_flag_desc = MSG_gpt_flag_desc, 1537 .custom_attribute_count = __arraycount(gpt_custom_attrs), 1538 .custom_attributes = gpt_custom_attrs, 1539 .get_part_types_count = gpt_type_count, 1540 .get_part_type = gpt_get_ptype, 1541 .get_generic_part_type = gpt_get_generic_type, 1542 .get_fs_part_type = gpt_get_fs_part_type, 1543 .get_part_alignment = gpt_get_part_alignment, 1544 .read_from_disk = gpt_read_from_disk, 1545 .create_new_for_disk = gpt_create_new, 1546 .have_boot_support = gpt_have_boot_support, 1547 .can_add_partition = gpt_can_add_partition, 1548 .custom_attribute_writable = gpt_custom_attribute_writable, 1549 .format_custom_attribute = gpt_format_custom_attribute, 1550 .custom_attribute_toggle = gpt_custom_attribute_toggle, 1551 .custom_attribute_set_str = gpt_custom_attribute_set_str, 1552 .get_part_device = gpt_get_part_device, 1553 .max_free_space_at = gpt_max_free_space_at, 1554 .get_free_spaces = gpt_get_free_spaces, 1555 .adapt_foreign_part_info = gpt_adapt, 1556 .get_part_info = gpt_get_part_info, 1557 .get_part_attr_str = gpt_get_part_attr_str, 1558 .set_part_info = gpt_set_part_info, 1559 .add_partition = gpt_add_part, 1560 .delete_all_partitions = gpt_delete_all_partitions, 1561 .delete_partition = gpt_delete_partition, 1562 .write_to_disk = gpt_write_to_disk, 1563 .free = gpt_free, 1564}; 1565