gpt.c revision 1.12
1/* $NetBSD: gpt.c,v 1.12 2019/11/12 16:33:14 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 <err.h> 36#include <paths.h> 37#include <sys/param.h> 38#include <sys/ioctl.h> 39#include <util.h> 40#include <uuid.h> 41 42bool gpt_parts_check(void); /* check for needed binaries */ 43 44 45/*************** GPT ************************************************/ 46/* a GPT based disk_partitions interface */ 47 48#define GUID_STR_LEN 40 49#define GPT_PTYPE_ALLOC 32 /* initial type array allocation, should be > 50 * gpt type -l | wc -l */ 51#define GPT_DEV_LEN 16 /* dkNN */ 52 53#define GPT_PARTS_PER_SEC 4 /* a 512 byte sector hols 4 entries */ 54#define GPT_DEFAULT_MAX_PARTS 128 55 56/* a usable label will be short, so we can get away with an arbitrary limit */ 57#define GPT_LABEL_LEN 96 58 59#define GPT_ATTR_BIOSBOOT 1 60#define GPT_ATTR_BOOTME 2 61#define GPT_ATTR_BOOTONCE 4 62#define GPT_ATTR_BOOTFAILED 8 63#define GPT_ATTR_NOBLOCKIO 16 64#define GPT_ATTR_REQUIRED 32 65 66/* when we don't care for BIOS or UEFI boot, use the combined boot flags */ 67#define GPT_ATTR_BOOT (GPT_ATTR_BIOSBOOT|GPT_ATTR_BOOTME) 68 69struct gpt_attr_desc { 70 const char *name; 71 uint flag; 72}; 73static const struct gpt_attr_desc gpt_avail_attrs[] = { 74 { "biosboot", GPT_ATTR_BIOSBOOT }, 75 { "bootme", GPT_ATTR_BOOTME }, 76 { "bootonce", GPT_ATTR_BOOTONCE }, 77 { "bootfailed", GPT_ATTR_BOOTFAILED }, 78 { "noblockio", GPT_ATTR_NOBLOCKIO }, 79 { "required", GPT_ATTR_REQUIRED }, 80 { NULL, 0 } 81}; 82 83struct gpt_ptype_desc { 84 struct part_type_desc gent; 85 char tid[GUID_STR_LEN]; 86 uint fsflags, default_fs_type; 87}; 88 89static const 90struct { 91 const char *name; 92 uint fstype; 93 enum part_type ptype; 94 uint fsflags; 95} gpt_fs_types[] = { 96 { .name = "ffs", .fstype = FS_BSDFFS, .ptype = PT_root, 97 .fsflags = GLM_LIKELY_FFS }, 98 { .name = "swap", .fstype = FS_SWAP, .ptype = PT_swap }, 99 { .name = "windows", .fstype = FS_MSDOS, .ptype = PT_FAT, 100 .fsflags = GLM_MAYBE_FAT32|GLM_MAYBE_NTFS }, 101 { .name = "windows", .fstype = FS_NTFS, .ptype = PT_FAT, 102 .fsflags = GLM_MAYBE_FAT32|GLM_MAYBE_NTFS }, 103 { .name = "efi", .fstype = FS_MSDOS, .ptype = PT_EFI_SYSTEM, 104 .fsflags = GLM_MAYBE_FAT32 }, 105 { .name = "bios", .fstype = FS_MSDOS, .ptype = PT_FAT, 106 .fsflags = GLM_MAYBE_FAT32 }, 107 { .name = "lfs", .fstype = FS_BSDLFS, .ptype = PT_root }, 108 { .name = "linux-data", .fstype = FS_EX2FS, .ptype = PT_root }, 109 { .name = "apple", .fstype = FS_HFS, .ptype = PT_unknown }, 110 { .name = "ccd", .fstype = FS_CCD, .ptype = PT_unknown }, 111 { .name = "cgd", .fstype = FS_CGD, .ptype = PT_unknown }, 112 { .name = "raid", .fstype = FS_RAID, .ptype = PT_root }, 113 { .name = "vmcore", .fstype = FS_VMKCORE, .ptype = PT_unknown }, 114 { .name = "vmfs", .fstype = FS_VMFS, .ptype = PT_unknown }, 115 { .name = "vmresered", .fstype = FS_VMWRESV, .ptype = PT_unknown } 116}; 117 118static size_t gpt_ptype_cnt = 0, gpt_ptype_alloc = 0; 119static struct gpt_ptype_desc *gpt_ptype_descs = NULL; 120 121/* "well" known types with special handling */ 122static const struct part_type_desc *gpt_native_root; 123 124/* similar to struct gpt_ent, but matching our needs */ 125struct gpt_part_entry { 126 const struct gpt_ptype_desc *gp_type; 127 char gp_id[GUID_STR_LEN]; /* partition guid as string */ 128 daddr_t gp_start, gp_size; 129 uint gp_attr; /* various attribute bits */ 130 char gp_label[GPT_LABEL_LEN]; /* user defined label */ 131 char gp_dev_name[GPT_DEV_LEN]; /* name of wedge */ 132 const char *last_mounted; /* last mounted if known */ 133 uint fs_type, fs_sub_type; /* FS_* and maybe sub type */ 134 uint gp_flags; 135#define GPEF_ON_DISK 1 /* This entry exists on-disk */ 136#define GPEF_MODIFIED 2 /* this entry has been changed */ 137#define GPEF_WEDGE 4 /* wedge for this exists */ 138#define GPEF_RESIZED 8 /* size has changed */ 139 struct gpt_part_entry *gp_next; 140}; 141 142static const struct gpt_ptype_desc *gpt_find_native_type( 143 const struct part_type_desc *gent); 144static const struct gpt_ptype_desc *gpt_find_guid_type(const char*); 145static bool 146gpt_info_to_part(struct gpt_part_entry *p, const struct disk_part_info *info, 147 const char **err_msg); 148 149const struct disk_partitioning_scheme gpt_parts; 150struct gpt_disk_partitions { 151 struct disk_partitions dp; 152 /* 153 * We keep a list of our current valid partitions, pointed 154 * to by "partitions". 155 * dp.num_part is the number of entries in "partitions". 156 * When partitions that have a representation on disk already 157 * are deleted, we move them to the "obsolete" list so we 158 * can issue the proper commands to remove it when writing back. 159 */ 160 struct gpt_part_entry *partitions, /* current partitions */ 161 *obsolete; /* deleted partitions */ 162 size_t max_num_parts; /* how many entries max? */ 163 size_t prologue, epilogue; /* number of sectors res. */ 164 bool has_gpt; /* disk already has a GPT */ 165}; 166 167/* 168 * Init global variables from MD details 169 */ 170static void 171gpt_md_init(bool is_boot_disk, size_t *max_parts, size_t *head, size_t *tail) 172{ 173 size_t num; 174 175 if (is_boot_disk) { 176#ifdef MD_GPT_INITIAL_SIZE 177#if MD_GPT_INITIAL_SIZE < 2*512 178#error impossible small GPT prologue 179#endif 180 num = ((MD_GPT_INITIAL_SIZE-(2*512))/512)*GPT_PARTS_PER_SEC; 181#else 182 num = GPT_DEFAULT_MAX_PARTS; 183#endif 184 } else { 185 num = GPT_DEFAULT_MAX_PARTS; 186 } 187 *max_parts = num; 188 *head = 2 + num/GPT_PARTS_PER_SEC; 189 *tail = 1 + num/GPT_PARTS_PER_SEC; 190} 191 192/* 193 * Parse a part of "gpt show" output into a struct gpt_part_entry. 194 * Output is from "show -a" format if details = false, otherwise 195 * from details for a specific partition (show -i or show -b) 196 */ 197static void 198gpt_add_info(struct gpt_part_entry *part, const char *tag, char *val, 199 bool details) 200{ 201 char *s, *e; 202 203 if (details && strcmp(tag, "Start:") == 0) { 204 part->gp_start = strtouq(val, NULL, 10); 205 } else if (details && strcmp(tag, "Size:") == 0) { 206 part->gp_size = strtouq(val, NULL, 10); 207 } else if (details && strcmp(tag, "Type:") == 0) { 208 s = strchr(val, '('); 209 if (!s) 210 return; 211 e = strchr(s, ')'); 212 if (!e) 213 return; 214 *e = 0; 215 part->gp_type = gpt_find_guid_type(s+1); 216 } else if (strcmp(tag, "TypeID:") == 0) { 217 part->gp_type = gpt_find_guid_type(val); 218 } else if (strcmp(tag, "GUID:") == 0) { 219 strlcpy(part->gp_id, val, sizeof(part->gp_id)); 220 } else if (strcmp(tag, "Label:") == 0) { 221 strlcpy(part->gp_label, val, sizeof(part->gp_label)); 222 } else if (strcmp(tag, "Attributes:") == 0) { 223 char *n; 224 225 while ((n = strsep(&val, ", ")) != NULL) { 226 if (*n == 0) 227 continue; 228 for (const struct gpt_attr_desc *p = gpt_avail_attrs; 229 p->name != NULL; p++) { 230 if (strcmp(p->name, n) == 0) 231 part->gp_attr |= p->flag; 232 } 233 } 234 } 235} 236 237/* 238 * Find the partition matching this wedge info and record that we 239 * have a wedge already. 240 */ 241static void 242update_part_from_wedge_info(struct gpt_disk_partitions *parts, 243 const struct dkwedge_info *dkw) 244{ 245 for (struct gpt_part_entry *p = parts->partitions; p != NULL; 246 p = p->gp_next) { 247 if (p->gp_start != dkw->dkw_offset || 248 (uint64_t)p->gp_size != dkw->dkw_size) 249 continue; 250 p->gp_flags |= GPEF_WEDGE; 251 strlcpy(p->gp_dev_name, dkw->dkw_devname, 252 sizeof p->gp_dev_name); 253 return; 254 } 255} 256 257static struct disk_partitions * 258gpt_read_from_disk(const char *dev, daddr_t start, daddr_t len, 259 const struct disk_partitioning_scheme *scheme) 260{ 261 char diskpath[MAXPATHLEN]; 262 int fd; 263 struct dkwedge_info *dkw; 264 struct dkwedge_list dkwl; 265 size_t bufsize, dk; 266 267 assert(start == 0); 268 assert(have_gpt); 269 270 if (run_program(RUN_SILENT | RUN_ERROR_OK, 271 "gpt -rq header %s", dev) != 0) 272 return NULL; 273 274 /* read the partitions */ 275 int i; 276 unsigned int p_index; 277 daddr_t p_start = 0, p_size = 0, avail_start = 0, avail_size = 0, 278 disk_size = 0; 279 char *textbuf, *t, *tt, p_type[STRSIZE]; 280 static const char regpart_prefix[] = "GPT part - "; 281 struct gpt_disk_partitions *parts; 282 struct gpt_part_entry *last = NULL, *add_to = NULL; 283 284 if (collect(T_OUTPUT, &textbuf, "gpt -r show -a %s 2>/dev/null", dev) 285 < 1) 286 return NULL; 287 288 /* parse output and create our list */ 289 parts = calloc(1, sizeof(*parts)); 290 if (parts == NULL) 291 return NULL; 292 293 (void)strtok(textbuf, "\n"); /* ignore first line */ 294 while ((t = strtok(NULL, "\n")) != NULL) { 295 i = 0; p_start = 0; p_size = 0; p_index = 0; 296 p_type[0] = 0; 297 while ((tt = strsep(&t, " \t")) != NULL) { 298 if (strlen(tt) == 0) 299 continue; 300 if (i == 0) { 301 if (add_to != NULL) 302 gpt_add_info(add_to, tt, t, false); 303 p_start = strtouq(tt, NULL, 10); 304 if (p_start == 0 && add_to != NULL) 305 break; 306 else 307 add_to = NULL; 308 } 309 if (i == 1) 310 p_size = strtouq(tt, NULL, 10); 311 if (i == 2) 312 p_index = strtouq(tt, NULL, 10); 313 if (i > 2 || (i == 2 && p_index == 0)) { 314 if (p_type[0]) 315 strlcat(p_type, " ", STRSIZE); 316 strlcat(p_type, tt, STRSIZE); 317 } 318 i++; 319 } 320 321 if (p_start == 0 || p_size == 0) 322 continue; 323 else if (strcmp(p_type, "Pri GPT table") == 0) { 324 avail_start = p_start + p_size; 325 parts->prologue = avail_start; 326 parts->epilogue = p_size + 1; 327 parts->max_num_parts = p_size * GPT_PARTS_PER_SEC; 328 } else if (strcmp(p_type, "Sec GPT table") == 0) 329 avail_size = p_start - avail_start; 330 else if(strcmp(p_type, "Sec GPT header") == 0) 331 disk_size = p_start + p_size; 332 else if (p_index == 0 && strlen(p_type) > 0) 333 /* Utilitary entry (PMBR, etc) */ 334 continue; 335 else if (p_index == 0) { 336 /* Free space */ 337 continue; 338 } else { 339 /* Usual partition */ 340 tt = p_type; 341 if (strncmp(tt, regpart_prefix, 342 strlen(regpart_prefix)) == 0) 343 tt += strlen(regpart_prefix); 344 345 /* Add to our linked list */ 346 struct gpt_part_entry *np = calloc(1, sizeof(*np)); 347 if (np == NULL) 348 break; 349 350 strlcpy(np->gp_label, tt, sizeof(np->gp_label)); 351 np->gp_start = p_start; 352 np->gp_size = p_size; 353 np->gp_flags |= GPEF_ON_DISK; 354 355 if (last == NULL) 356 parts->partitions = np; 357 else 358 last->gp_next = np; 359 last = np; 360 add_to = np; 361 parts->dp.num_part++; 362 } 363 } 364 free(textbuf); 365 366 /* If the GPT was not complete (e.g. truncated image), barf */ 367 if (disk_size <= 0) { 368 free(parts); 369 return NULL; 370 } 371 372 parts->dp.pscheme = scheme; 373 parts->dp.disk = strdup(dev); 374 parts->dp.disk_start = start; 375 parts->dp.disk_size = disk_size; 376 parts->dp.free_space = avail_size; 377 parts->has_gpt = true; 378 379 fd = opendisk(parts->dp.disk, O_RDONLY, diskpath, sizeof(diskpath), 0); 380 for (struct gpt_part_entry *p = parts->partitions; p != NULL; 381 p = p->gp_next) { 382#ifdef DEFAULT_UFS2 383 bool fs_is_default = false; 384#endif 385 386 if (p->gp_type != NULL) { 387 388 if (p->gp_type->fsflags != 0) { 389 const char *lm = get_last_mounted(fd, 390 p->gp_start, &p->fs_type, 391 &p->fs_sub_type, p->gp_type->fsflags); 392 if (lm != NULL && *lm != 0) { 393 char *path = strdup(lm); 394 canonicalize_last_mounted(path); 395 p->last_mounted = path; 396 } else { 397 p->fs_type = p->gp_type-> 398 default_fs_type; 399#ifdef DEFAULT_UFS2 400 fs_is_default = true; 401#endif 402 } 403 } else { 404 p->fs_type = p->gp_type->default_fs_type; 405#ifdef DEFAULT_UFS2 406 fs_is_default = true; 407#endif 408 } 409#ifdef DEFAULT_UFS2 410 if (fs_is_default && p->fs_type == FS_BSDFFS) 411 p->fs_sub_type = 2; 412#endif 413 } 414 415 parts->dp.free_space -= p->gp_size; 416 } 417 418 /* 419 * Check if we have any (matching/auto-configured) wedges already 420 */ 421 dkw = NULL; 422 dkwl.dkwl_buf = dkw; 423 dkwl.dkwl_bufsize = 0; 424 if (ioctl(fd, DIOCLWEDGES, &dkwl) == 0) { 425 /* do not even try to deal with any races at this point */ 426 bufsize = dkwl.dkwl_nwedges * sizeof(*dkw); 427 dkw = malloc(bufsize); 428 dkwl.dkwl_buf = dkw; 429 dkwl.dkwl_bufsize = bufsize; 430 if (dkw != NULL && ioctl(fd, DIOCLWEDGES, &dkwl) == 0) { 431 for (dk = 0; dk < dkwl.dkwl_ncopied; dk++) 432 update_part_from_wedge_info(parts, &dkw[dk]); 433 } 434 free(dkw); 435 } 436 437 close(fd); 438 439 return &parts->dp; 440} 441 442static struct disk_partitions * 443gpt_create_new(const char *disk, daddr_t start, daddr_t len, daddr_t total, 444 bool is_boot_drive) 445{ 446 struct gpt_disk_partitions *parts; 447 448 if (start != 0) { 449 assert(0); 450 return NULL; 451 } 452 453 parts = calloc(1, sizeof(*parts)); 454 if (!parts) 455 return NULL; 456 457 parts->dp.pscheme = &gpt_parts; 458 parts->dp.disk = strdup(disk); 459 460 gpt_md_init(is_boot_drive, &parts->max_num_parts, &parts->prologue, 461 &parts->epilogue); 462 463 parts->dp.disk_start = start; 464 parts->dp.disk_size = len; 465 parts->dp.free_space = len - start - parts->prologue - parts->epilogue; 466 parts->has_gpt = false; 467 468 return &parts->dp; 469} 470 471static bool 472gpt_get_part_info(const struct disk_partitions *arg, part_id id, 473 struct disk_part_info *info) 474{ 475 static const struct part_type_desc gpt_unknown_type = 476 { .generic_ptype = PT_undef, 477 .short_desc = "<unknown>" }; 478 const struct gpt_disk_partitions *parts = 479 (const struct gpt_disk_partitions*)arg; 480 const struct gpt_part_entry *p = parts->partitions; 481 part_id no; 482 483 for (no = 0; p != NULL && no < id; no++) 484 p = p->gp_next; 485 486 if (no != id || p == NULL) 487 return false; 488 489 memset(info, 0, sizeof(*info)); 490 info->start = p->gp_start; 491 info->size = p->gp_size; 492 if (p->gp_type) 493 info->nat_type = &p->gp_type->gent; 494 else 495 info->nat_type = &gpt_unknown_type; 496 info->last_mounted = p->last_mounted; 497 info->fs_type = p->fs_type; 498 info->fs_sub_type = p->fs_sub_type; 499 500 return true; 501} 502 503static bool 504gpt_get_part_attr_str(const struct disk_partitions *arg, part_id id, 505 char *str, size_t avail_space) 506{ 507 const struct gpt_disk_partitions *parts = 508 (const struct gpt_disk_partitions*)arg; 509 const struct gpt_part_entry *p = parts->partitions; 510 part_id no; 511 static const char *flags = NULL; 512 513 for (no = 0; p != NULL && no < id; no++) 514 p = p->gp_next; 515 516 if (no != id || p == NULL) 517 return false; 518 519 if (flags == NULL) 520 flags = msg_string(MSG_gpt_flags); 521 522 if (avail_space < 2) 523 return false; 524 525 if (p->gp_attr & GPT_ATTR_BOOT) 526 *str++ = flags[0]; 527 *str = 0; 528 529 return true; 530} 531 532/* 533 * Find insert position and check for duplicates. 534 * If all goes well, insert the new "entry" in the "list". 535 * If there are collisions, report "no free space". 536 * We keep all lists sorted by start sector number, 537 */ 538static bool 539gpt_insert_part_into_list(struct gpt_disk_partitions *parts, 540 struct gpt_part_entry **list, 541 struct gpt_part_entry *entry, const char **err_msg) 542{ 543 struct gpt_part_entry *p, *last; 544 545 /* find the first entry past the new one (if any) */ 546 for (last = NULL, p = *list; p != NULL; last = p, p = p->gp_next) { 547 if (p->gp_start > entry->gp_start) 548 break; 549 } 550 551 /* check if last partition overlaps with new one */ 552 if (last) { 553 if (last->gp_start + last->gp_size > entry->gp_start) { 554 if (err_msg) 555 *err_msg = msg_string(MSG_No_free_space); 556 return false; 557 } 558 } 559 560 if (p == NULL) { 561 entry->gp_next = NULL; 562 if (last != NULL) { 563 last->gp_next = entry; 564 } 565 } else { 566 /* check if new entry overlaps with next */ 567 if (entry->gp_start + entry->gp_size > p->gp_start) { 568 if (err_msg) 569 *err_msg = msg_string(MSG_No_free_space); 570 return false; 571 } 572 573 entry->gp_next = p; 574 if (last != NULL) 575 last->gp_next = entry; 576 else 577 *list = entry; 578 } 579 if (*list == NULL) 580 *list = entry; 581 582 return true; 583} 584 585static bool 586gpt_set_part_info(struct disk_partitions *arg, part_id id, 587 const struct disk_part_info *info, const char **err_msg) 588{ 589 struct gpt_disk_partitions *parts = 590 (struct gpt_disk_partitions*)arg; 591 struct gpt_part_entry *p = parts->partitions, *n; 592 part_id no; 593 daddr_t lendiff; 594 595 for (no = 0; p != NULL && no < id; no++) 596 p = p->gp_next; 597 598 if (no != id || p == NULL) 599 return false; 600 601 if ((p->gp_flags & GPEF_ON_DISK)) { 602 if (info->start != p->gp_start) { 603 /* partition moved, we need to delete and re-add */ 604 n = calloc(1, sizeof(*n)); 605 if (n == NULL) { 606 if (err_msg) 607 *err_msg = err_outofmem; 608 return false; 609 } 610 *n = *p; 611 p->gp_flags &= ~GPEF_ON_DISK; 612 if (!gpt_insert_part_into_list(parts, &parts->obsolete, 613 n, err_msg)) 614 return false; 615 } else if (info->size != p->gp_size) { 616 p->gp_flags |= GPEF_RESIZED; 617 } 618 } 619 620 p->gp_flags |= GPEF_MODIFIED; 621 622 lendiff = info->size - p->gp_size; 623 parts->dp.free_space -= lendiff; 624 return gpt_info_to_part(p, info, err_msg); 625} 626 627static size_t 628gpt_get_free_spaces_internal(const struct gpt_disk_partitions *parts, 629 struct disk_part_free_space *result, size_t max_num_result, 630 daddr_t min_space_size, daddr_t align, daddr_t start, daddr_t ignore) 631{ 632 size_t cnt = 0; 633 daddr_t s, e, from, size, end_of_disk; 634 struct gpt_part_entry *p; 635 636 if (align > 1) 637 start = max(roundup(start, align), align); 638 if (start < 0 || start < (daddr_t)parts->prologue) 639 start = parts->prologue; 640 if (parts->dp.disk_start != 0 && parts->dp.disk_start > start) 641 start = parts->dp.disk_start; 642 if (min_space_size < 1) 643 min_space_size = 1; 644 end_of_disk = parts->dp.disk_start + parts->dp.disk_size 645 - parts->epilogue; 646 from = start; 647 while (from < end_of_disk && cnt < max_num_result) { 648again: 649 size = parts->dp.disk_start + parts->dp.disk_size - from; 650 start = from; 651 if (start + size > end_of_disk) 652 size = end_of_disk - start; 653 for (p = parts->partitions; p != NULL; p = p->gp_next) { 654 s = p->gp_start; 655 e = p->gp_size + s; 656 if (s == ignore) 657 continue; 658 if (e < from) 659 continue; 660 if (s <= from && e > from) { 661 if (e - 1 >= end_of_disk) 662 return cnt; 663 from = e + 1; 664 if (align > 1) { 665 from = max(roundup(from, align), align); 666 if (from >= end_of_disk) { 667 size = 0; 668 break; 669 } 670 } 671 goto again; 672 } 673 if (s > from && s - from < size) { 674 size = s - from; 675 } 676 } 677 if (size >= min_space_size) { 678 result->start = start; 679 result->size = size; 680 result++; 681 cnt++; 682 } 683 from += size + 1; 684 if (align > 1) 685 from = max(roundup(from, align), align); 686 } 687 688 return cnt; 689} 690 691static daddr_t 692gpt_max_free_space_at(const struct disk_partitions *arg, daddr_t start) 693{ 694 const struct gpt_disk_partitions *parts = 695 (const struct gpt_disk_partitions*)arg; 696 struct disk_part_free_space space; 697 698 if (gpt_get_free_spaces_internal(parts, &space, 1, 1, 0, 699 start, start) == 1) 700 return space.size; 701 702 return 0; 703} 704 705static size_t 706gpt_get_free_spaces(const struct disk_partitions *arg, 707 struct disk_part_free_space *result, size_t max_num_result, 708 daddr_t min_space_size, daddr_t align, daddr_t start, 709 daddr_t ignore) 710{ 711 const struct gpt_disk_partitions *parts = 712 (const struct gpt_disk_partitions*)arg; 713 714 return gpt_get_free_spaces_internal(parts, result, 715 max_num_result, min_space_size, align, start, ignore); 716} 717 718static void 719gpt_match_ptype(const char *name, struct gpt_ptype_desc *t) 720{ 721 size_t i; 722 723 for (i = 0; i < __arraycount(gpt_fs_types); i++) { 724 if (strcmp(name, gpt_fs_types[i].name) == 0) { 725 t->gent.generic_ptype = gpt_fs_types[i].ptype; 726 t->fsflags = gpt_fs_types[i].fsflags; 727 t->default_fs_type = gpt_fs_types[i].fstype; 728 729 /* recongnize special entries */ 730 if (gpt_native_root == NULL && i == 0) 731 gpt_native_root = &t->gent; 732 733 return; 734 } 735 } 736 737 t->gent.generic_ptype = PT_unknown; 738 t->fsflags = 0; 739 t->default_fs_type = FS_BSDFFS; 740} 741 742static void 743gpt_internal_add_ptype(const char *uid, const char *name, const char *desc) 744{ 745 if (gpt_ptype_cnt >= gpt_ptype_alloc) { 746 gpt_ptype_alloc = gpt_ptype_alloc ? 2*gpt_ptype_alloc 747 : GPT_PTYPE_ALLOC; 748 struct gpt_ptype_desc *nptypes = realloc(gpt_ptype_descs, 749 gpt_ptype_alloc*sizeof(*gpt_ptype_descs)); 750 if (nptypes == 0) 751 errx(EXIT_FAILURE, "out of memory"); 752 gpt_ptype_descs = nptypes; 753 } 754 755 strlcpy(gpt_ptype_descs[gpt_ptype_cnt].tid, uid, 756 sizeof(gpt_ptype_descs[gpt_ptype_cnt].tid)); 757 gpt_ptype_descs[gpt_ptype_cnt].gent.short_desc = strdup(name); 758 gpt_ptype_descs[gpt_ptype_cnt].gent.description = strdup(desc); 759 gpt_match_ptype(name, &gpt_ptype_descs[gpt_ptype_cnt]); 760 gpt_ptype_cnt++; 761} 762 763static void 764gpt_init_ptypes(void) 765{ 766 if (gpt_ptype_cnt == 0) 767 gpt_uuid_query(gpt_internal_add_ptype); 768} 769 770static void 771gpt_cleanup(void) 772{ 773 /* free all of gpt_ptype_descs */ 774 for (size_t i = 0; i < gpt_ptype_cnt; i++) { 775 free(__UNCONST(gpt_ptype_descs[i].gent.short_desc)); 776 free(__UNCONST(gpt_ptype_descs[i].gent.description)); 777 } 778 free(gpt_ptype_descs); 779 gpt_ptype_descs = NULL; 780 gpt_ptype_cnt = gpt_ptype_alloc = 0; 781} 782 783static size_t 784gpt_type_count(void) 785{ 786 if (gpt_ptype_cnt == 0) 787 gpt_init_ptypes(); 788 789 return gpt_ptype_cnt; 790} 791 792static const struct part_type_desc * 793gpt_get_ptype(size_t ndx) 794{ 795 if (gpt_ptype_cnt == 0) 796 gpt_init_ptypes(); 797 798 if (ndx >= gpt_ptype_cnt) 799 return NULL; 800 801 return &gpt_ptype_descs[ndx].gent; 802} 803 804static const struct part_type_desc * 805gpt_get_generic_type(enum part_type gent) 806{ 807 if (gpt_ptype_cnt == 0) 808 gpt_init_ptypes(); 809 810 if (gent == PT_root) 811 return gpt_native_root; 812 if (gent == PT_unknown) 813 return NULL; 814 815 for (size_t i = 0; i < gpt_ptype_cnt; i++) 816 if (gpt_ptype_descs[i].gent.generic_ptype == gent) 817 return &gpt_ptype_descs[i].gent; 818 819 return NULL; 820} 821 822static const struct gpt_ptype_desc * 823gpt_find_native_type(const struct part_type_desc *gent) 824{ 825 if (gpt_ptype_cnt == 0) 826 gpt_init_ptypes(); 827 828 if (gent == NULL) 829 return NULL; 830 831 for (size_t i = 0; i < gpt_ptype_cnt; i++) 832 if (gent == &gpt_ptype_descs[i].gent) 833 return &gpt_ptype_descs[i]; 834 835 gent = gpt_get_generic_type(gent->generic_ptype); 836 if (gent == NULL) 837 return NULL; 838 839 /* this can not recurse deeper than once, we would not have found a 840 * generic type a few lines above if it would. */ 841 return gpt_find_native_type(gent); 842} 843 844static const struct gpt_ptype_desc * 845gpt_find_guid_type(const char *uid) 846{ 847 if (gpt_ptype_cnt == 0) 848 gpt_init_ptypes(); 849 850 if (uid == NULL || uid[0] == 0) 851 return NULL; 852 853 for (size_t i = 0; i < gpt_ptype_cnt; i++) 854 if (strcmp(gpt_ptype_descs[i].tid, uid) == 0) 855 return &gpt_ptype_descs[i]; 856 857 return NULL; 858} 859 860static const struct part_type_desc * 861gpt_find_type(const char *desc) 862{ 863 if (gpt_ptype_cnt == 0) 864 gpt_init_ptypes(); 865 866 if (desc == NULL || desc[0] == 0) 867 return NULL; 868 869 for (size_t i = 0; i < gpt_ptype_cnt; i++) 870 if (strcmp(gpt_ptype_descs[i].gent.short_desc, desc) == 0) 871 return &gpt_ptype_descs[i].gent; 872 873 return NULL; 874} 875 876static const struct part_type_desc * 877gpt_get_fs_part_type(unsigned fstype, unsigned fs_sub_type) 878{ 879 size_t i; 880 881 for (i = 0; i < __arraycount(gpt_fs_types); i++) 882 if (fstype == gpt_fs_types[i].fstype) 883 return gpt_find_type(gpt_fs_types[i].name); 884 885 return NULL; 886} 887 888static const struct part_type_desc * 889gpt_get_uuid_part_type(const uuid_t *id) 890{ 891 char str[GUID_STR_LEN], desc[GUID_STR_LEN + MENUSTRSIZE]; 892 const struct gpt_ptype_desc *t; 893 char *guid = NULL; 894 uint32_t err; 895 896 uuid_to_string(id, &guid, &err); 897 strlcpy(str, err == uuid_s_ok ? guid : "-", sizeof str); 898 free(guid); 899 900 t = gpt_find_guid_type(str); 901 if (t == NULL) { 902 snprintf(desc, sizeof desc, "%s (%s)", 903 msg_string(MSG_custom_type), str); 904 gpt_internal_add_ptype(str, str, desc); 905 t = gpt_find_guid_type(str); 906 assert(t != NULL); 907 } 908 return &t->gent; 909} 910 911static const struct part_type_desc * 912gpt_create_custom_part_type(const char *custom, const char **err_msg) 913{ 914 uuid_t id; 915 uint32_t err; 916 917 uuid_from_string(custom, &id, &err); 918 if (err_msg != NULL && 919 (err == uuid_s_invalid_string_uuid || err == uuid_s_bad_version)) { 920 *err_msg = MSG_invalid_guid; 921 return NULL; 922 } 923 if (err != uuid_s_ok) 924 return NULL; 925 926 return gpt_get_uuid_part_type(&id); 927} 928 929static const struct part_type_desc * 930gpt_create_unknown_part_type(void) 931{ 932 uuid_t id; 933 uint32_t err; 934 935 uuid_create(&id, &err); 936 if (err != uuid_s_ok) 937 return NULL; 938 939 return gpt_get_uuid_part_type(&id); 940} 941 942static daddr_t 943gpt_get_part_alignment(const struct disk_partitions *parts) 944{ 945 946 assert(parts->disk_size > 0); 947 if (parts->disk_size < 0) 948 return 1; 949 950 /* Use 1MB offset/alignemnt for large (>128GB) disks */ 951 if (parts->disk_size > HUGE_DISK_SIZE) 952 return 2048; 953 else if (parts->disk_size > TINY_DISK_SIZE) 954 return 64; 955 else 956 return 4; 957} 958 959static bool 960gpt_can_add_partition(const struct disk_partitions *arg) 961{ 962 const struct gpt_disk_partitions *parts = 963 (const struct gpt_disk_partitions*)arg; 964 struct disk_part_free_space space; 965 daddr_t align; 966 967 if (parts->dp.num_part >= parts->max_num_parts) 968 return false; 969 970 align = gpt_get_part_alignment(arg); 971 if (parts->dp.free_space <= align) 972 return false; 973 974 if (gpt_get_free_spaces_internal(parts, &space, 1, align, align, 975 0, -1) < 1) 976 return false; 977 978 return true; 979} 980 981static bool 982gpt_info_to_part(struct gpt_part_entry *p, const struct disk_part_info *info, 983 const char **err_msg) 984{ 985 p->gp_type = gpt_find_native_type(info->nat_type); 986 p->gp_start = info->start; 987 p->gp_size = info->size; 988 if (info->last_mounted != NULL && info->last_mounted != 989 p->last_mounted) { 990 free(__UNCONST(p->last_mounted)); 991 p->last_mounted = strdup(info->last_mounted); 992 } 993 p->fs_type = info->fs_type; 994 p->fs_sub_type = info->fs_sub_type; 995 996 return true; 997} 998 999static part_id 1000gpt_add_part(struct disk_partitions *arg, 1001 const struct disk_part_info *info, const char **err_msg) 1002{ 1003 struct gpt_disk_partitions *parts = 1004 (struct gpt_disk_partitions*)arg; 1005 struct disk_part_free_space space; 1006 struct disk_part_info data = *info; 1007 struct gpt_part_entry *p; 1008 bool ok; 1009 1010 if (err_msg != NULL) 1011 *err_msg = NULL; 1012 1013 if (gpt_get_free_spaces_internal(parts, &space, 1, 1, 1, 1014 info->start, -1) < 1) { 1015 if (err_msg) 1016 *err_msg = msg_string(MSG_No_free_space); 1017 return NO_PART; 1018 } 1019 if (parts->dp.num_part >= parts->max_num_parts) { 1020 if (err_msg) 1021 *err_msg = msg_string(MSG_err_too_many_partitions); 1022 return NO_PART; 1023 } 1024 1025 if (data.size > space.size) 1026 data.size = space.size; 1027 1028 p = calloc(1, sizeof(*p)); 1029 if (p == NULL) { 1030 if (err_msg != NULL) 1031 *err_msg = INTERNAL_ERROR; 1032 return NO_PART; 1033 } 1034 if (!gpt_info_to_part(p, &data, err_msg)) { 1035 free(p); 1036 return NO_PART; 1037 } 1038 p->gp_flags |= GPEF_MODIFIED; 1039 ok = gpt_insert_part_into_list(parts, &parts->partitions, p, err_msg); 1040 if (ok) { 1041 parts->dp.num_part++; 1042 parts->dp.free_space -= p->gp_size; 1043 return parts->dp.num_part-1; 1044 } else { 1045 free(p); 1046 return NO_PART; 1047 } 1048} 1049 1050static bool 1051gpt_delete_partition(struct disk_partitions *arg, part_id id, 1052 const char **err_msg) 1053{ 1054 struct gpt_disk_partitions *parts = (struct gpt_disk_partitions*)arg; 1055 struct gpt_part_entry *p, *last = NULL; 1056 part_id i; 1057 bool res; 1058 1059 if (parts->dp.num_part == 0) 1060 return false; 1061 1062 for (i = 0, p = parts->partitions; 1063 i != id && i < parts->dp.num_part && p != NULL; 1064 i++, p = p->gp_next) 1065 last = p; 1066 1067 if (p == NULL) { 1068 if (err_msg) 1069 *err_msg = INTERNAL_ERROR; 1070 return false; 1071 } 1072 1073 if (last == NULL) 1074 parts->partitions = p->gp_next; 1075 else 1076 last->gp_next = p->gp_next; 1077 1078 res = true; 1079 if (p->gp_flags & GPEF_ON_DISK) { 1080 if (!gpt_insert_part_into_list(parts, &parts->obsolete, 1081 p, err_msg)) 1082 res = false; 1083 } else { 1084 free(p); 1085 } 1086 1087 if (res) { 1088 parts->dp.num_part--; 1089 parts->dp.free_space += p->gp_size; 1090 } 1091 1092 return res; 1093} 1094 1095static bool 1096gpt_delete_all_partitions(struct disk_partitions *arg) 1097{ 1098 struct gpt_disk_partitions *parts = (struct gpt_disk_partitions*)arg; 1099 1100 while (parts->dp.num_part > 0) { 1101 if (!gpt_delete_partition(&parts->dp, 0, NULL)) 1102 return false; 1103 } 1104 1105 return true; 1106} 1107 1108static bool 1109gpt_read_part(const char *disk, daddr_t start, struct gpt_part_entry *p) 1110{ 1111 char *textbuf, *t, *tt; 1112 static const char expected_hdr[] = "Details for index "; 1113 1114 /* run gpt show for this partition */ 1115 if (collect(T_OUTPUT, &textbuf, 1116 "gpt -r show -b %" PRIu64 " %s 2>/dev/null", start, disk) < 1) 1117 return false; 1118 1119 /* 1120 * gpt show should respond with single partition details, but will 1121 * fall back to "show -a" output if something is wrong 1122 */ 1123 t = strtok(textbuf, "\n"); /* first line is special */ 1124 if (strncmp(t, expected_hdr, sizeof(expected_hdr)-1) != 0) { 1125 free(textbuf); 1126 return false; 1127 } 1128 1129 /* parse output into "old" */ 1130 while ((t = strtok(NULL, "\n")) != NULL) { 1131 tt = strsep(&t, " \t"); 1132 if (strlen(tt) == 0) 1133 continue; 1134 gpt_add_info(p, tt, t, true); 1135 } 1136 free(textbuf); 1137 1138 return true; 1139} 1140 1141static bool 1142gpt_apply_attr(const char *disk, const char *cmd, off_t start, uint todo) 1143{ 1144 size_t i; 1145 char attr_str[STRSIZE]; 1146 1147 if (todo == 0) 1148 return true; 1149 1150 strcpy(attr_str, "-a "); 1151 for (i = 0; todo != 0; i++) { 1152 if (!(gpt_avail_attrs[i].flag & todo)) 1153 continue; 1154 todo &= ~gpt_avail_attrs[i].flag; 1155 if (attr_str[0]) 1156 strlcat(attr_str, ",", 1157 sizeof(attr_str)); 1158 strlcat(attr_str, 1159 gpt_avail_attrs[i].name, 1160 sizeof(attr_str)); 1161 } 1162 if (run_program(RUN_SILENT, 1163 "gpt %s %s -b %" PRIu64 " %s", cmd, attr_str, start, disk) != 0) 1164 return false; 1165 return true; 1166} 1167 1168/* 1169 * Modify an existing on-disk partition. 1170 * Start and size can not be changed here, caller needs to deal 1171 * with that kind of changes upfront. 1172 */ 1173static bool 1174gpt_modify_part(const char *disk, struct gpt_part_entry *p) 1175{ 1176 struct gpt_part_entry old; 1177 uint todo_set, todo_unset; 1178 1179 /* 1180 * Query current on-disk state 1181 */ 1182 memset(&old, 0, sizeof old); 1183 if (!gpt_read_part(disk, p->gp_start, &old)) 1184 return false; 1185 1186 /* Reject unsupported changes */ 1187 if (old.gp_start != p->gp_start || old.gp_size != p->gp_size) 1188 return false; 1189 1190 /* 1191 * GUID should never change, but the internal copy 1192 * may not yet know it. 1193 */ 1194 strcpy(p->gp_id, old.gp_id); 1195 1196 /* Check type */ 1197 if (p->gp_type != old.gp_type) { 1198 if (run_program(RUN_SILENT, 1199 "gpt label -b %" PRIu64 " -T %s %s", 1200 p->gp_start, p->gp_type->tid, disk) != 0) 1201 return false; 1202 } 1203 1204 /* Check label */ 1205 if (strcmp(p->gp_label, old.gp_label) != 0) { 1206 if (run_program(RUN_SILENT, 1207 "gpt label -b %" PRIu64 " -l \'%s\' %s", 1208 p->gp_start, p->gp_label, disk) != 0) 1209 return false; 1210 } 1211 1212 /* Check attributes */ 1213 if (p->gp_attr != old.gp_attr) { 1214 if (p->gp_attr == 0) { 1215 if (run_program(RUN_SILENT, 1216 "gpt set -N -b %" PRIu64 " %s", 1217 p->gp_start, disk) != 0) 1218 return false; 1219 } else { 1220 todo_set = (p->gp_attr ^ old.gp_attr) & p->gp_attr; 1221 todo_unset = (p->gp_attr ^ old.gp_attr) & old.gp_attr; 1222 if (!gpt_apply_attr(disk, "unset", p->gp_start, 1223 todo_unset)) 1224 return false; 1225 if (!gpt_apply_attr(disk, "set", p->gp_start, 1226 todo_set)) 1227 return false; 1228 } 1229 } 1230 1231 return true; 1232} 1233 1234/* 1235 * verbatim copy from sys/dev/dkwedge/dkwedge_bsdlabel.c: 1236 * map FS_* to wedge strings 1237 */ 1238static const char * 1239bsdlabel_fstype_to_str(uint8_t fstype) 1240{ 1241 const char *str; 1242 1243 /* 1244 * For each type known to FSTYPE_DEFN (from <sys/disklabel.h>), 1245 * a suitable case branch will convert the type number to a string. 1246 */ 1247 switch (fstype) { 1248#define FSTYPE_TO_STR_CASE(tag, number, name, fsck, mount) \ 1249 case __CONCAT(FS_,tag): str = __CONCAT(DKW_PTYPE_,tag); break; 1250 FSTYPE_DEFN(FSTYPE_TO_STR_CASE) 1251#undef FSTYPE_TO_STR_CASE 1252 default: str = NULL; break; 1253 } 1254 1255 return (str); 1256} 1257 1258static bool 1259gpt_add_wedge(const char *disk, struct gpt_part_entry *p) 1260{ 1261 struct dkwedge_info dkw; 1262 const char *tname; 1263 char diskpath[MAXPATHLEN]; 1264 int fd; 1265 1266 memset(&dkw, 0, sizeof(dkw)); 1267 tname = bsdlabel_fstype_to_str(p->fs_type); 1268 if (tname) 1269 strlcpy(dkw.dkw_ptype, tname, sizeof(dkw.dkw_ptype)); 1270 1271 strlcpy((char*)&dkw.dkw_wname, p->gp_id, sizeof(dkw.dkw_wname)); 1272 dkw.dkw_offset = p->gp_start; 1273 dkw.dkw_size = p->gp_size; 1274 1275 fd = opendisk(disk, O_RDWR, diskpath, sizeof(diskpath), 0); 1276 if (fd < 0) 1277 return false; 1278 if (ioctl(fd, DIOCAWEDGE, &dkw) == -1) { 1279 close(fd); 1280 return false; 1281 } 1282 close(fd); 1283 1284 strlcpy(p->gp_dev_name, dkw.dkw_devname, sizeof(p->gp_dev_name)); 1285 p->gp_flags |= GPEF_WEDGE; 1286 return true; 1287} 1288 1289static void 1290escape_spaces(char *dest, const char *src) 1291{ 1292 unsigned char c; 1293 1294 while (*src) { 1295 c = *src++; 1296 if (isspace(c) || c == '\\') 1297 *dest++ = '\\'; 1298 *dest++ = c; 1299 } 1300 *dest = 0; 1301} 1302 1303static bool 1304gpt_get_part_device(const struct disk_partitions *arg, 1305 part_id id, char *devname, size_t max_devname_len, int *part, 1306 enum dev_name_usage usage, bool with_path) 1307{ 1308 const struct gpt_disk_partitions *parts = 1309 (const struct gpt_disk_partitions*)arg; 1310 struct gpt_part_entry *p = parts->partitions; 1311 char tmpname[GPT_LABEL_LEN*2]; 1312 part_id no; 1313 1314 1315 for (no = 0; p != NULL && no < id; no++) 1316 p = p->gp_next; 1317 1318 if (no != id || p == NULL) 1319 return false; 1320 1321 if (part) 1322 *part = -1; 1323 1324 if (!(p->gp_flags & GPEF_WEDGE) && 1325 (usage == plain_name || usage == raw_dev_name)) 1326 gpt_add_wedge(arg->disk, p); 1327 1328 switch (usage) { 1329 case logical_name: 1330 if (p->gp_label[0] != 0) { 1331 escape_spaces(tmpname, p->gp_label); 1332 snprintf(devname, max_devname_len, 1333 "NAME=%s", tmpname); 1334 } else { 1335 snprintf(devname, max_devname_len, 1336 "NAME=%s", p->gp_id); 1337 } 1338 break; 1339 case plain_name: 1340 assert(p->gp_flags & GPEF_WEDGE); 1341 if (with_path) 1342 snprintf(devname, max_devname_len, _PATH_DEV "%s", 1343 p->gp_dev_name); 1344 else 1345 strlcpy(devname, p->gp_dev_name, max_devname_len); 1346 break; 1347 case raw_dev_name: 1348 assert(p->gp_flags & GPEF_WEDGE); 1349 if (with_path) 1350 snprintf(devname, max_devname_len, _PATH_DEV "r%s", 1351 p->gp_dev_name); 1352 else 1353 snprintf(devname, max_devname_len, "r%s", 1354 p->gp_dev_name); 1355 break; 1356 default: 1357 return false; 1358 } 1359 1360 return true; 1361} 1362 1363static bool 1364gpt_write_to_disk(struct disk_partitions *arg) 1365{ 1366 struct gpt_disk_partitions *parts = (struct gpt_disk_partitions*)arg; 1367 struct gpt_part_entry *p, *n; 1368 char label_arg[sizeof(p->gp_label) + 10]; 1369 char diskpath[MAXPATHLEN]; 1370 int fd, bits = 0; 1371 bool root_is_new = false, efi_is_new = false; 1372 part_id root_id = NO_PART, efi_id = NO_PART, pno; 1373 1374 /* 1375 * Remove all wedges on this disk - they may become invalid and we 1376 * have no easy way to associate them with the partitioning data. 1377 * Instead we will explicitly request creation of wedges on demand 1378 * later. 1379 */ 1380 fd = opendisk(arg->disk, O_RDWR, diskpath, sizeof(diskpath), 0); 1381 if (fd < 0) 1382 return false; 1383 if (ioctl(fd, DIOCRMWEDGES, &bits) == -1) 1384 return false; 1385 close(fd); 1386 1387 /* 1388 * Collect first root and efi partition (if available), clear 1389 * "have wedge" flags. 1390 */ 1391 for (pno = 0, p = parts->partitions; p != NULL; p = p->gp_next, pno++) { 1392 p->gp_flags &= ~GPEF_WEDGE; 1393 if (root_id == NO_PART && p->gp_type != NULL) { 1394 if (p->gp_type->gent.generic_ptype == PT_root && 1395 p->gp_start == pm->ptstart) { 1396 root_id = pno; 1397 root_is_new = !(p->gp_flags & GPEF_ON_DISK); 1398 } else if (efi_id == NO_PART && 1399 p->gp_type->gent.generic_ptype == PT_EFI_SYSTEM) { 1400 efi_id = pno; 1401 efi_is_new = !(p->gp_flags & GPEF_ON_DISK); 1402 } 1403 } 1404 } 1405 1406 /* 1407 * If no GPT on disk yet, create it. 1408 */ 1409 if (!parts->has_gpt) { 1410 char limit[30]; 1411 1412 if (parts->max_num_parts > 0) 1413 sprintf(limit, "-p %zu", parts->max_num_parts); 1414 else 1415 limit[0] = 0; 1416 if (run_program(RUN_SILENT, "gpt create %s %s", 1417 limit, parts->dp.disk)) 1418 return false; 1419 parts->has_gpt = true; 1420 } 1421 1422 /* 1423 * Delete all old partitions 1424 */ 1425 for (p = parts->obsolete; p != NULL; p = n) { 1426 run_program(RUN_SILENT, "gpt -n remove -b %" PRIu64 " %s", 1427 p->gp_start, arg->disk); 1428 n = p->gp_next; 1429 free(p); 1430 } 1431 parts->obsolete = NULL; 1432 1433 /* 1434 * Modify existing but changed partitions 1435 */ 1436 for (p = parts->partitions; p != NULL; p = p->gp_next) { 1437 if (!(p->gp_flags & GPEF_ON_DISK)) 1438 continue; 1439 1440 if (p->gp_flags & GPEF_RESIZED) { 1441 run_program(RUN_SILENT, 1442 "gpt -n resize -b %" PRIu64 " -s %" PRIu64 "s %s", 1443 p->gp_start, p->gp_size, arg->disk); 1444 p->gp_flags &= ~GPEF_RESIZED; 1445 } 1446 1447 if (!(p->gp_flags & GPEF_MODIFIED)) 1448 continue; 1449 1450 if (!gpt_modify_part(parts->dp.disk, p)) 1451 return false; 1452 } 1453 1454 /* 1455 * Add new partitions 1456 */ 1457 for (p = parts->partitions; p != NULL; p = p->gp_next) { 1458 if (p->gp_flags & GPEF_ON_DISK) 1459 continue; 1460 if (!(p->gp_flags & GPEF_MODIFIED)) 1461 continue; 1462 1463 if (p->gp_label[0] == 0) 1464 label_arg[0] = 0; 1465 else 1466 sprintf(label_arg, "-l \'%s\'", p->gp_label); 1467 1468 if (p->gp_type != NULL) 1469 run_program(RUN_SILENT, 1470 "gpt -n add -b %" PRIu64 " -s %" PRIu64 1471 "s -t %s %s %s", 1472 p->gp_start, p->gp_size, p->gp_type->tid, 1473 label_arg, arg->disk); 1474 else 1475 run_program(RUN_SILENT, 1476 "gpt -n add -b %" PRIu64 " -s %" PRIu64 1477 "s %s %s", 1478 p->gp_start, p->gp_size, label_arg, arg->disk); 1479 gpt_apply_attr(arg->disk, "set", p->gp_start, p->gp_attr); 1480 gpt_read_part(arg->disk, p->gp_start, p); 1481 p->gp_flags |= GPEF_ON_DISK; 1482 } 1483 1484 /* 1485 * Additional MD bootloader magic... 1486 */ 1487 if (!md_gpt_post_write(&parts->dp, root_id, root_is_new, efi_id, 1488 efi_is_new)) 1489 return false; 1490 1491 return true; 1492} 1493 1494static part_id 1495gpt_find_by_name(struct disk_partitions *arg, const char *name) 1496{ 1497 struct gpt_disk_partitions *parts = (struct gpt_disk_partitions*)arg; 1498 struct gpt_part_entry *p; 1499 part_id pno; 1500 1501 for (pno = 0, p = parts->partitions; p != NULL; 1502 p = p->gp_next, pno++) { 1503 if (strcmp(p->gp_label, name) == 0) 1504 return pno; 1505 if (strcmp(p->gp_id, name) == 0) 1506 return pno; 1507 } 1508 1509 return NO_PART; 1510} 1511 1512bool 1513gpt_parts_check(void) 1514{ 1515 1516 check_available_binaries(); 1517 1518 return have_gpt && have_dk; 1519} 1520 1521static void 1522gpt_free(struct disk_partitions *arg) 1523{ 1524 struct gpt_disk_partitions *parts = (struct gpt_disk_partitions*)arg; 1525 struct gpt_part_entry *p, *n; 1526 1527 assert(parts != NULL); 1528 for (p = parts->partitions; p != NULL; p = n) { 1529 free(__UNCONST(p->last_mounted)); 1530 n = p->gp_next; 1531 free(p); 1532 } 1533 free(__UNCONST(parts->dp.disk)); 1534 free(parts); 1535} 1536 1537static bool 1538gpt_custom_attribute_writable(const struct disk_partitions *arg, 1539 part_id ptn, size_t attr_no) 1540{ 1541 const struct gpt_disk_partitions *parts = 1542 (const struct gpt_disk_partitions*)arg; 1543 size_t i; 1544 struct gpt_part_entry *p; 1545 1546 if (attr_no >= arg->pscheme->custom_attribute_count) 1547 return false; 1548 1549 const msg label = arg->pscheme->custom_attributes[attr_no].label; 1550 1551 /* we can not edit the uuid attribute */ 1552 if (label == MSG_ptn_uuid) 1553 return false; 1554 1555 /* the label is always editable */ 1556 if (label == MSG_ptn_label) 1557 return true; 1558 1559 /* the GPT type is read only */ 1560 if (label == MSG_ptn_gpt_type) 1561 return false; 1562 1563 /* BOOTME makes no sense on swap partitions */ 1564 for (i = 0, p = parts->partitions; p != NULL; i++, p = p->gp_next) 1565 if (i == ptn) 1566 break; 1567 1568 if (p == NULL) 1569 return false; 1570 1571 if (p->fs_type == FS_SWAP || 1572 (p->gp_type != NULL && p->gp_type->gent.generic_ptype == PT_swap)) 1573 return false; 1574 1575 return true; 1576} 1577 1578static const char * 1579gpt_get_label_str(const struct disk_partitions *arg, part_id ptn) 1580{ 1581 const struct gpt_disk_partitions *parts = 1582 (const struct gpt_disk_partitions*)arg; 1583 size_t i; 1584 struct gpt_part_entry *p; 1585 1586 for (i = 0, p = parts->partitions; p != NULL; i++, p = p->gp_next) 1587 if (i == ptn) 1588 break; 1589 1590 if (p == NULL) 1591 return NULL; 1592 1593 if (p->gp_label[0] != 0) 1594 return p->gp_label; 1595 return p->gp_id; 1596} 1597 1598static bool 1599gpt_format_custom_attribute(const struct disk_partitions *arg, 1600 part_id ptn, size_t attr_no, const struct disk_part_info *info, 1601 char *out, size_t out_space) 1602{ 1603 const struct gpt_disk_partitions *parts = 1604 (const struct gpt_disk_partitions*)arg; 1605 size_t i; 1606 struct gpt_part_entry *p, data; 1607 1608 for (i = 0, p = parts->partitions; p != NULL; i++, p = p->gp_next) 1609 if (i == ptn) 1610 break; 1611 1612 if (p == NULL) 1613 return false; 1614 1615 if (attr_no >= parts->dp.pscheme->custom_attribute_count) 1616 return false; 1617 1618 const msg label = parts->dp.pscheme->custom_attributes[attr_no].label; 1619 1620 if (info != NULL) { 1621 data = *p; 1622 gpt_info_to_part(&data, info, NULL); 1623 p = &data; 1624 } 1625 1626 if (label == MSG_ptn_label) 1627 strlcpy(out, p->gp_label, out_space); 1628 else if (label == MSG_ptn_uuid) 1629 strlcpy(out, p->gp_id, out_space); 1630 else if (label == MSG_ptn_gpt_type) { 1631 if (p->gp_type != NULL) 1632 strlcpy(out, p->gp_type->gent.description, out_space); 1633 else if (out_space > 1) 1634 out[0] = 0; 1635 } else if (label == MSG_ptn_boot) 1636 strlcpy(out, msg_string(p->gp_attr & GPT_ATTR_BOOT ? 1637 MSG_Yes : MSG_No), out_space); 1638 else 1639 return false; 1640 1641 return true; 1642} 1643 1644static bool 1645gpt_custom_attribute_toggle(struct disk_partitions *arg, 1646 part_id ptn, size_t attr_no) 1647{ 1648 const struct gpt_disk_partitions *parts = 1649 (const struct gpt_disk_partitions*)arg; 1650 size_t i; 1651 struct gpt_part_entry *p; 1652 1653 for (i = 0, p = parts->partitions; p != NULL; i++, p = p->gp_next) 1654 if (i == ptn) 1655 break; 1656 1657 if (p == NULL) 1658 return false; 1659 1660 if (attr_no >= parts->dp.pscheme->custom_attribute_count) 1661 return false; 1662 1663 const msg label = parts->dp.pscheme->custom_attributes[attr_no].label; 1664 if (label != MSG_ptn_boot) 1665 return false; 1666 1667 if (p->gp_attr & GPT_ATTR_BOOT) { 1668 p->gp_attr &= ~GPT_ATTR_BOOT; 1669 } else { 1670 for (i = 0, p = parts->partitions; p != NULL; 1671 i++, p = p->gp_next) 1672 if (i == ptn) 1673 p->gp_attr |= GPT_ATTR_BOOT; 1674 else 1675 p->gp_attr &= ~GPT_ATTR_BOOT; 1676 } 1677 return true; 1678} 1679 1680static bool 1681gpt_custom_attribute_set_str(struct disk_partitions *arg, 1682 part_id ptn, size_t attr_no, const char *new_val) 1683{ 1684 const struct gpt_disk_partitions *parts = 1685 (const struct gpt_disk_partitions*)arg; 1686 size_t i; 1687 struct gpt_part_entry *p; 1688 1689 for (i = 0, p = parts->partitions; p != NULL; i++, p = p->gp_next) 1690 if (i == ptn) 1691 break; 1692 1693 if (p == NULL) 1694 return false; 1695 1696 if (attr_no >= parts->dp.pscheme->custom_attribute_count) 1697 return false; 1698 1699 const msg label = parts->dp.pscheme->custom_attributes[attr_no].label; 1700 1701 if (label != MSG_ptn_label) 1702 return false; 1703 1704 strlcpy(p->gp_label, new_val, sizeof(p->gp_label)); 1705 return true; 1706} 1707 1708static bool 1709gpt_have_boot_support(const char *disk) 1710{ 1711#ifdef HAVE_GPT_BOOT 1712 return true; 1713#else 1714 return false; 1715#endif 1716} 1717 1718const struct disk_part_custom_attribute gpt_custom_attrs[] = { 1719 { .label = MSG_ptn_label, .type = pet_str }, 1720 { .label = MSG_ptn_uuid, .type = pet_str }, 1721 { .label = MSG_ptn_gpt_type, .type = pet_str }, 1722 { .label = MSG_ptn_boot, .type = pet_bool }, 1723}; 1724 1725const struct disk_partitioning_scheme 1726gpt_parts = { 1727 .name = MSG_parttype_gpt, 1728 .short_name = MSG_parttype_gpt_short, 1729 .part_flag_desc = MSG_gpt_flag_desc, 1730 .custom_attribute_count = __arraycount(gpt_custom_attrs), 1731 .custom_attributes = gpt_custom_attrs, 1732 .get_part_types_count = gpt_type_count, 1733 .get_part_type = gpt_get_ptype, 1734 .get_generic_part_type = gpt_get_generic_type, 1735 .get_fs_part_type = gpt_get_fs_part_type, 1736 .create_custom_part_type = gpt_create_custom_part_type, 1737 .create_unknown_part_type = gpt_create_unknown_part_type, 1738 .get_part_alignment = gpt_get_part_alignment, 1739 .read_from_disk = gpt_read_from_disk, 1740 .create_new_for_disk = gpt_create_new, 1741 .have_boot_support = gpt_have_boot_support, 1742 .find_by_name = gpt_find_by_name, 1743 .can_add_partition = gpt_can_add_partition, 1744 .custom_attribute_writable = gpt_custom_attribute_writable, 1745 .format_custom_attribute = gpt_format_custom_attribute, 1746 .custom_attribute_toggle = gpt_custom_attribute_toggle, 1747 .custom_attribute_set_str = gpt_custom_attribute_set_str, 1748 .other_partition_identifier = gpt_get_label_str, 1749 .get_part_device = gpt_get_part_device, 1750 .max_free_space_at = gpt_max_free_space_at, 1751 .get_free_spaces = gpt_get_free_spaces, 1752 .adapt_foreign_part_info = generic_adapt_foreign_part_info, 1753 .get_part_info = gpt_get_part_info, 1754 .get_part_attr_str = gpt_get_part_attr_str, 1755 .set_part_info = gpt_set_part_info, 1756 .add_partition = gpt_add_part, 1757 .delete_all_partitions = gpt_delete_all_partitions, 1758 .delete_partition = gpt_delete_partition, 1759 .write_to_disk = gpt_write_to_disk, 1760 .free = gpt_free, 1761 .cleanup = gpt_cleanup, 1762}; 1763