gpt.c revision 1.16
1/* $NetBSD: gpt.c,v 1.16 2020/01/27 21:21:22 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 holds 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_root }, 111 { .name = "cgd", .fstype = FS_CGD, .ptype = PT_root }, 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, size_t bps, 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->dp.bytes_per_sector = bps; 378 parts->has_gpt = true; 379 380 fd = opendisk(parts->dp.disk, O_RDONLY, diskpath, sizeof(diskpath), 0); 381 for (struct gpt_part_entry *p = parts->partitions; p != NULL; 382 p = p->gp_next) { 383#ifdef DEFAULT_UFS2 384 bool fs_is_default = false; 385#endif 386 387 if (p->gp_type != NULL) { 388 389 if (p->gp_type->fsflags != 0) { 390 const char *lm = get_last_mounted(fd, 391 p->gp_start, &p->fs_type, 392 &p->fs_sub_type, p->gp_type->fsflags); 393 if (lm != NULL && *lm != 0) { 394 char *path = strdup(lm); 395 canonicalize_last_mounted(path); 396 p->last_mounted = path; 397 } else { 398 p->fs_type = p->gp_type-> 399 default_fs_type; 400#ifdef DEFAULT_UFS2 401 fs_is_default = true; 402#endif 403 } 404 } else { 405 p->fs_type = p->gp_type->default_fs_type; 406#ifdef DEFAULT_UFS2 407 fs_is_default = true; 408#endif 409 } 410#ifdef DEFAULT_UFS2 411 if (fs_is_default && p->fs_type == FS_BSDFFS) 412 p->fs_sub_type = 2; 413#endif 414 } 415 416 parts->dp.free_space -= p->gp_size; 417 } 418 419 /* 420 * Check if we have any (matching/auto-configured) wedges already 421 */ 422 dkw = NULL; 423 dkwl.dkwl_buf = dkw; 424 dkwl.dkwl_bufsize = 0; 425 if (ioctl(fd, DIOCLWEDGES, &dkwl) == 0) { 426 /* do not even try to deal with any races at this point */ 427 bufsize = dkwl.dkwl_nwedges * sizeof(*dkw); 428 dkw = malloc(bufsize); 429 dkwl.dkwl_buf = dkw; 430 dkwl.dkwl_bufsize = bufsize; 431 if (dkw != NULL && ioctl(fd, DIOCLWEDGES, &dkwl) == 0) { 432 for (dk = 0; dk < dkwl.dkwl_ncopied; dk++) 433 update_part_from_wedge_info(parts, &dkw[dk]); 434 } 435 free(dkw); 436 } 437 438 close(fd); 439 440 return &parts->dp; 441} 442 443static size_t 444gpt_cyl_size(const struct disk_partitions *arg) 445{ 446 return MEG / 512; 447} 448 449static struct disk_partitions * 450gpt_create_new(const char *disk, daddr_t start, daddr_t len, 451 bool is_boot_drive, struct disk_partitions *parent) 452{ 453 struct gpt_disk_partitions *parts; 454 struct disk_geom geo; 455 456 if (start != 0) { 457 assert(0); 458 return NULL; 459 } 460 461 if (!get_disk_geom(disk, &geo)) 462 return NULL; 463 464 parts = calloc(1, sizeof(*parts)); 465 if (!parts) 466 return NULL; 467 468 parts->dp.pscheme = &gpt_parts; 469 parts->dp.disk = strdup(disk); 470 471 gpt_md_init(is_boot_drive, &parts->max_num_parts, &parts->prologue, 472 &parts->epilogue); 473 474 parts->dp.disk_start = start; 475 parts->dp.disk_size = len; 476 parts->dp.bytes_per_sector = geo.dg_secsize; 477 parts->dp.free_space = len - start - parts->prologue - parts->epilogue; 478 parts->has_gpt = false; 479 480 return &parts->dp; 481} 482 483static bool 484gpt_get_part_info(const struct disk_partitions *arg, part_id id, 485 struct disk_part_info *info) 486{ 487 static const struct part_type_desc gpt_unknown_type = 488 { .generic_ptype = PT_undef, 489 .short_desc = "<unknown>" }; 490 const struct gpt_disk_partitions *parts = 491 (const struct gpt_disk_partitions*)arg; 492 const struct gpt_part_entry *p = parts->partitions; 493 part_id no; 494 495 for (no = 0; p != NULL && no < id; no++) 496 p = p->gp_next; 497 498 if (no != id || p == NULL) 499 return false; 500 501 memset(info, 0, sizeof(*info)); 502 info->start = p->gp_start; 503 info->size = p->gp_size; 504 if (p->gp_type) 505 info->nat_type = &p->gp_type->gent; 506 else 507 info->nat_type = &gpt_unknown_type; 508 info->last_mounted = p->last_mounted; 509 info->fs_type = p->fs_type; 510 info->fs_sub_type = p->fs_sub_type; 511 512 return true; 513} 514 515static bool 516gpt_get_part_attr_str(const struct disk_partitions *arg, part_id id, 517 char *str, size_t avail_space) 518{ 519 const struct gpt_disk_partitions *parts = 520 (const struct gpt_disk_partitions*)arg; 521 const struct gpt_part_entry *p = parts->partitions; 522 part_id no; 523 static const char *flags = NULL; 524 525 for (no = 0; p != NULL && no < id; no++) 526 p = p->gp_next; 527 528 if (no != id || p == NULL) 529 return false; 530 531 if (flags == NULL) 532 flags = msg_string(MSG_gpt_flags); 533 534 if (avail_space < 2) 535 return false; 536 537 if (p->gp_attr & GPT_ATTR_BOOT) 538 *str++ = flags[0]; 539 *str = 0; 540 541 return true; 542} 543 544/* 545 * Find insert position and check for duplicates. 546 * If all goes well, insert the new "entry" in the "list". 547 * If there are collisions, report "no free space". 548 * We keep all lists sorted by start sector number, 549 */ 550static bool 551gpt_insert_part_into_list(struct gpt_disk_partitions *parts, 552 struct gpt_part_entry **list, 553 struct gpt_part_entry *entry, const char **err_msg) 554{ 555 struct gpt_part_entry *p, *last; 556 557 /* find the first entry past the new one (if any) */ 558 for (last = NULL, p = *list; p != NULL; last = p, p = p->gp_next) { 559 if (p->gp_start > entry->gp_start) 560 break; 561 } 562 563 /* check if last partition overlaps with new one */ 564 if (last) { 565 if (last->gp_start + last->gp_size > entry->gp_start) { 566 if (err_msg) 567 *err_msg = msg_string(MSG_No_free_space); 568 return false; 569 } 570 } 571 572 if (p == NULL) { 573 entry->gp_next = NULL; 574 if (last != NULL) { 575 last->gp_next = entry; 576 } 577 } else { 578 /* check if new entry overlaps with next */ 579 if (entry->gp_start + entry->gp_size > p->gp_start) { 580 if (err_msg) 581 *err_msg = msg_string(MSG_No_free_space); 582 return false; 583 } 584 585 entry->gp_next = p; 586 if (last != NULL) 587 last->gp_next = entry; 588 else 589 *list = entry; 590 } 591 if (*list == NULL) 592 *list = entry; 593 594 return true; 595} 596 597static bool 598gpt_set_part_info(struct disk_partitions *arg, part_id id, 599 const struct disk_part_info *info, const char **err_msg) 600{ 601 struct gpt_disk_partitions *parts = 602 (struct gpt_disk_partitions*)arg; 603 struct gpt_part_entry *p = parts->partitions, *n; 604 part_id no; 605 daddr_t lendiff; 606 607 for (no = 0; p != NULL && no < id; no++) 608 p = p->gp_next; 609 610 if (no != id || p == NULL) 611 return false; 612 613 if ((p->gp_flags & GPEF_ON_DISK)) { 614 if (info->start != p->gp_start) { 615 /* partition moved, we need to delete and re-add */ 616 n = calloc(1, sizeof(*n)); 617 if (n == NULL) { 618 if (err_msg) 619 *err_msg = err_outofmem; 620 return false; 621 } 622 *n = *p; 623 p->gp_flags &= ~GPEF_ON_DISK; 624 if (!gpt_insert_part_into_list(parts, &parts->obsolete, 625 n, err_msg)) 626 return false; 627 } else if (info->size != p->gp_size) { 628 p->gp_flags |= GPEF_RESIZED; 629 } 630 } 631 632 p->gp_flags |= GPEF_MODIFIED; 633 634 lendiff = info->size - p->gp_size; 635 parts->dp.free_space -= lendiff; 636 return gpt_info_to_part(p, info, err_msg); 637} 638 639static size_t 640gpt_get_free_spaces_internal(const struct gpt_disk_partitions *parts, 641 struct disk_part_free_space *result, size_t max_num_result, 642 daddr_t min_space_size, daddr_t align, daddr_t start, daddr_t ignore) 643{ 644 size_t cnt = 0; 645 daddr_t s, e, from, size, end_of_disk; 646 struct gpt_part_entry *p; 647 648 if (align > 1) 649 start = max(roundup(start, align), align); 650 if (start < 0 || start < (daddr_t)parts->prologue) 651 start = parts->prologue; 652 if (parts->dp.disk_start != 0 && parts->dp.disk_start > start) 653 start = parts->dp.disk_start; 654 if (min_space_size < 1) 655 min_space_size = 1; 656 end_of_disk = parts->dp.disk_start + parts->dp.disk_size 657 - parts->epilogue; 658 from = start; 659 while (from < end_of_disk && cnt < max_num_result) { 660again: 661 size = parts->dp.disk_start + parts->dp.disk_size - from; 662 start = from; 663 if (start + size > end_of_disk) 664 size = end_of_disk - start; 665 for (p = parts->partitions; p != NULL; p = p->gp_next) { 666 s = p->gp_start; 667 e = p->gp_size + s; 668 if (s == ignore) 669 continue; 670 if (e < from) 671 continue; 672 if (s <= from && e > from) { 673 if (e - 1 >= end_of_disk) 674 return cnt; 675 from = e + 1; 676 if (align > 1) { 677 from = max(roundup(from, align), align); 678 if (from >= end_of_disk) { 679 size = 0; 680 break; 681 } 682 } 683 goto again; 684 } 685 if (s > from && s - from < size) { 686 size = s - from; 687 } 688 } 689 if (size >= min_space_size) { 690 result->start = start; 691 result->size = size; 692 result++; 693 cnt++; 694 } 695 from += size + 1; 696 if (align > 1) 697 from = max(roundup(from, align), align); 698 } 699 700 return cnt; 701} 702 703static daddr_t 704gpt_max_free_space_at(const struct disk_partitions *arg, daddr_t start) 705{ 706 const struct gpt_disk_partitions *parts = 707 (const struct gpt_disk_partitions*)arg; 708 struct disk_part_free_space space; 709 710 if (gpt_get_free_spaces_internal(parts, &space, 1, 1, 0, 711 start, start) == 1) 712 return space.size; 713 714 return 0; 715} 716 717static size_t 718gpt_get_free_spaces(const struct disk_partitions *arg, 719 struct disk_part_free_space *result, size_t max_num_result, 720 daddr_t min_space_size, daddr_t align, daddr_t start, 721 daddr_t ignore) 722{ 723 const struct gpt_disk_partitions *parts = 724 (const struct gpt_disk_partitions*)arg; 725 726 return gpt_get_free_spaces_internal(parts, result, 727 max_num_result, min_space_size, align, start, ignore); 728} 729 730static void 731gpt_match_ptype(const char *name, struct gpt_ptype_desc *t) 732{ 733 size_t i; 734 735 for (i = 0; i < __arraycount(gpt_fs_types); i++) { 736 if (strcmp(name, gpt_fs_types[i].name) == 0) { 737 t->gent.generic_ptype = gpt_fs_types[i].ptype; 738 t->fsflags = gpt_fs_types[i].fsflags; 739 t->default_fs_type = gpt_fs_types[i].fstype; 740 741 /* recongnize special entries */ 742 if (gpt_native_root == NULL && i == 0) 743 gpt_native_root = &t->gent; 744 745 return; 746 } 747 } 748 749 t->gent.generic_ptype = PT_unknown; 750 t->fsflags = 0; 751 t->default_fs_type = FS_BSDFFS; 752} 753 754static void 755gpt_internal_add_ptype(const char *uid, const char *name, const char *desc) 756{ 757 if (gpt_ptype_cnt >= gpt_ptype_alloc) { 758 gpt_ptype_alloc = gpt_ptype_alloc ? 2*gpt_ptype_alloc 759 : GPT_PTYPE_ALLOC; 760 struct gpt_ptype_desc *nptypes = realloc(gpt_ptype_descs, 761 gpt_ptype_alloc*sizeof(*gpt_ptype_descs)); 762 if (nptypes == 0) 763 errx(EXIT_FAILURE, "out of memory"); 764 gpt_ptype_descs = nptypes; 765 } 766 767 strlcpy(gpt_ptype_descs[gpt_ptype_cnt].tid, uid, 768 sizeof(gpt_ptype_descs[gpt_ptype_cnt].tid)); 769 gpt_ptype_descs[gpt_ptype_cnt].gent.short_desc = strdup(name); 770 gpt_ptype_descs[gpt_ptype_cnt].gent.description = strdup(desc); 771 gpt_match_ptype(name, &gpt_ptype_descs[gpt_ptype_cnt]); 772 gpt_ptype_cnt++; 773} 774 775static void 776gpt_init_ptypes(void) 777{ 778 if (gpt_ptype_cnt == 0) 779 gpt_uuid_query(gpt_internal_add_ptype); 780} 781 782static void 783gpt_cleanup(void) 784{ 785 /* free all of gpt_ptype_descs */ 786 for (size_t i = 0; i < gpt_ptype_cnt; i++) { 787 free(__UNCONST(gpt_ptype_descs[i].gent.short_desc)); 788 free(__UNCONST(gpt_ptype_descs[i].gent.description)); 789 } 790 free(gpt_ptype_descs); 791 gpt_ptype_descs = NULL; 792 gpt_ptype_cnt = gpt_ptype_alloc = 0; 793} 794 795static size_t 796gpt_type_count(void) 797{ 798 if (gpt_ptype_cnt == 0) 799 gpt_init_ptypes(); 800 801 return gpt_ptype_cnt; 802} 803 804static const struct part_type_desc * 805gpt_get_ptype(size_t ndx) 806{ 807 if (gpt_ptype_cnt == 0) 808 gpt_init_ptypes(); 809 810 if (ndx >= gpt_ptype_cnt) 811 return NULL; 812 813 return &gpt_ptype_descs[ndx].gent; 814} 815 816static const struct part_type_desc * 817gpt_get_generic_type(enum part_type gent) 818{ 819 if (gpt_ptype_cnt == 0) 820 gpt_init_ptypes(); 821 822 if (gent == PT_root) 823 return gpt_native_root; 824 if (gent == PT_unknown) 825 return NULL; 826 827 for (size_t i = 0; i < gpt_ptype_cnt; i++) 828 if (gpt_ptype_descs[i].gent.generic_ptype == gent) 829 return &gpt_ptype_descs[i].gent; 830 831 return NULL; 832} 833 834static const struct gpt_ptype_desc * 835gpt_find_native_type(const struct part_type_desc *gent) 836{ 837 if (gpt_ptype_cnt == 0) 838 gpt_init_ptypes(); 839 840 if (gent == NULL) 841 return NULL; 842 843 for (size_t i = 0; i < gpt_ptype_cnt; i++) 844 if (gent == &gpt_ptype_descs[i].gent) 845 return &gpt_ptype_descs[i]; 846 847 gent = gpt_get_generic_type(gent->generic_ptype); 848 if (gent == NULL) 849 return NULL; 850 851 /* this can not recurse deeper than once, we would not have found a 852 * generic type a few lines above if it would. */ 853 return gpt_find_native_type(gent); 854} 855 856static const struct gpt_ptype_desc * 857gpt_find_guid_type(const char *uid) 858{ 859 if (gpt_ptype_cnt == 0) 860 gpt_init_ptypes(); 861 862 if (uid == NULL || uid[0] == 0) 863 return NULL; 864 865 for (size_t i = 0; i < gpt_ptype_cnt; i++) 866 if (strcmp(gpt_ptype_descs[i].tid, uid) == 0) 867 return &gpt_ptype_descs[i]; 868 869 return NULL; 870} 871 872static const struct part_type_desc * 873gpt_find_type(const char *desc) 874{ 875 if (gpt_ptype_cnt == 0) 876 gpt_init_ptypes(); 877 878 if (desc == NULL || desc[0] == 0) 879 return NULL; 880 881 for (size_t i = 0; i < gpt_ptype_cnt; i++) 882 if (strcmp(gpt_ptype_descs[i].gent.short_desc, desc) == 0) 883 return &gpt_ptype_descs[i].gent; 884 885 return NULL; 886} 887 888static const struct part_type_desc * 889gpt_get_fs_part_type(enum part_type pt, unsigned fstype, unsigned fs_sub_type) 890{ 891 size_t i; 892 893 /* Try with complete match (including part_type) first */ 894 for (i = 0; i < __arraycount(gpt_fs_types); i++) 895 if (fstype == gpt_fs_types[i].fstype && 896 pt == gpt_fs_types[i].ptype) 897 return gpt_find_type(gpt_fs_types[i].name); 898 899 /* If that did not work, ignore part_type */ 900 for (i = 0; i < __arraycount(gpt_fs_types); i++) 901 if (fstype == gpt_fs_types[i].fstype) 902 return gpt_find_type(gpt_fs_types[i].name); 903 904 return NULL; 905} 906 907static bool 908gpt_get_default_fstype(const struct part_type_desc *nat_type, 909 unsigned *fstype, unsigned *fs_sub_type) 910{ 911 const struct gpt_ptype_desc *gtype; 912 913 gtype = gpt_find_native_type(nat_type); 914 if (gtype == NULL) 915 return false; 916 917 *fstype = gtype->default_fs_type; 918#ifdef DEFAULT_UFS2 919 if (gtype->default_fs_type == FS_BSDFFS) 920 *fs_sub_type = 2; 921 else 922#endif 923 *fs_sub_type = 0; 924 return true; 925} 926 927static const struct part_type_desc * 928gpt_get_uuid_part_type(const uuid_t *id) 929{ 930 char str[GUID_STR_LEN], desc[GUID_STR_LEN + MENUSTRSIZE]; 931 const struct gpt_ptype_desc *t; 932 char *guid = NULL; 933 uint32_t err; 934 935 uuid_to_string(id, &guid, &err); 936 strlcpy(str, err == uuid_s_ok ? guid : "-", sizeof str); 937 free(guid); 938 939 t = gpt_find_guid_type(str); 940 if (t == NULL) { 941 snprintf(desc, sizeof desc, "%s (%s)", 942 msg_string(MSG_custom_type), str); 943 gpt_internal_add_ptype(str, str, desc); 944 t = gpt_find_guid_type(str); 945 assert(t != NULL); 946 } 947 return &t->gent; 948} 949 950static const struct part_type_desc * 951gpt_create_custom_part_type(const char *custom, const char **err_msg) 952{ 953 uuid_t id; 954 uint32_t err; 955 956 uuid_from_string(custom, &id, &err); 957 if (err_msg != NULL && 958 (err == uuid_s_invalid_string_uuid || err == uuid_s_bad_version)) { 959 *err_msg = MSG_invalid_guid; 960 return NULL; 961 } 962 if (err != uuid_s_ok) 963 return NULL; 964 965 return gpt_get_uuid_part_type(&id); 966} 967 968static const struct part_type_desc * 969gpt_create_unknown_part_type(void) 970{ 971 uuid_t id; 972 uint32_t err; 973 974 uuid_create(&id, &err); 975 if (err != uuid_s_ok) 976 return NULL; 977 978 return gpt_get_uuid_part_type(&id); 979} 980 981static daddr_t 982gpt_get_part_alignment(const struct disk_partitions *parts) 983{ 984 985 assert(parts->disk_size > 0); 986 if (parts->disk_size < 0) 987 return 1; 988 989 /* Use 1MB offset/alignemnt for large (>128GB) disks */ 990 if (parts->disk_size > HUGE_DISK_SIZE) 991 return 2048; 992 else if (parts->disk_size > TINY_DISK_SIZE) 993 return 64; 994 else 995 return 4; 996} 997 998static bool 999gpt_can_add_partition(const struct disk_partitions *arg) 1000{ 1001 const struct gpt_disk_partitions *parts = 1002 (const struct gpt_disk_partitions*)arg; 1003 struct disk_part_free_space space; 1004 daddr_t align; 1005 1006 if (parts->dp.num_part >= parts->max_num_parts) 1007 return false; 1008 1009 align = gpt_get_part_alignment(arg); 1010 if (parts->dp.free_space <= align) 1011 return false; 1012 1013 if (gpt_get_free_spaces_internal(parts, &space, 1, align, align, 1014 0, -1) < 1) 1015 return false; 1016 1017 return true; 1018} 1019 1020static bool 1021gpt_info_to_part(struct gpt_part_entry *p, const struct disk_part_info *info, 1022 const char **err_msg) 1023{ 1024 p->gp_type = gpt_find_native_type(info->nat_type); 1025 p->gp_start = info->start; 1026 p->gp_size = info->size; 1027 if (info->last_mounted != NULL && info->last_mounted != 1028 p->last_mounted) { 1029 free(__UNCONST(p->last_mounted)); 1030 p->last_mounted = strdup(info->last_mounted); 1031 } 1032 p->fs_type = info->fs_type; 1033 p->fs_sub_type = info->fs_sub_type; 1034 1035 return true; 1036} 1037 1038static part_id 1039gpt_add_part(struct disk_partitions *arg, 1040 const struct disk_part_info *info, const char **err_msg) 1041{ 1042 struct gpt_disk_partitions *parts = 1043 (struct gpt_disk_partitions*)arg; 1044 struct disk_part_free_space space; 1045 struct disk_part_info data = *info; 1046 struct gpt_part_entry *p; 1047 bool ok; 1048 1049 if (err_msg != NULL) 1050 *err_msg = NULL; 1051 1052 if (gpt_get_free_spaces_internal(parts, &space, 1, 1, 1, 1053 info->start, -1) < 1) { 1054 if (err_msg) 1055 *err_msg = msg_string(MSG_No_free_space); 1056 return NO_PART; 1057 } 1058 if (parts->dp.num_part >= parts->max_num_parts) { 1059 if (err_msg) 1060 *err_msg = msg_string(MSG_err_too_many_partitions); 1061 return NO_PART; 1062 } 1063 1064 if (data.size > space.size) 1065 data.size = space.size; 1066 1067 p = calloc(1, sizeof(*p)); 1068 if (p == NULL) { 1069 if (err_msg != NULL) 1070 *err_msg = INTERNAL_ERROR; 1071 return NO_PART; 1072 } 1073 if (!gpt_info_to_part(p, &data, err_msg)) { 1074 free(p); 1075 return NO_PART; 1076 } 1077 p->gp_flags |= GPEF_MODIFIED; 1078 ok = gpt_insert_part_into_list(parts, &parts->partitions, p, err_msg); 1079 if (ok) { 1080 parts->dp.num_part++; 1081 parts->dp.free_space -= p->gp_size; 1082 return parts->dp.num_part-1; 1083 } else { 1084 free(p); 1085 return NO_PART; 1086 } 1087} 1088 1089static bool 1090gpt_delete_partition(struct disk_partitions *arg, part_id id, 1091 const char **err_msg) 1092{ 1093 struct gpt_disk_partitions *parts = (struct gpt_disk_partitions*)arg; 1094 struct gpt_part_entry *p, *last = NULL; 1095 part_id i; 1096 bool res; 1097 1098 if (parts->dp.num_part == 0) 1099 return false; 1100 1101 for (i = 0, p = parts->partitions; 1102 i != id && i < parts->dp.num_part && p != NULL; 1103 i++, p = p->gp_next) 1104 last = p; 1105 1106 if (p == NULL) { 1107 if (err_msg) 1108 *err_msg = INTERNAL_ERROR; 1109 return false; 1110 } 1111 1112 if (last == NULL) 1113 parts->partitions = p->gp_next; 1114 else 1115 last->gp_next = p->gp_next; 1116 1117 res = true; 1118 if (p->gp_flags & GPEF_ON_DISK) { 1119 if (!gpt_insert_part_into_list(parts, &parts->obsolete, 1120 p, err_msg)) 1121 res = false; 1122 } else { 1123 free(p); 1124 } 1125 1126 if (res) { 1127 parts->dp.num_part--; 1128 parts->dp.free_space += p->gp_size; 1129 } 1130 1131 return res; 1132} 1133 1134static bool 1135gpt_delete_all_partitions(struct disk_partitions *arg) 1136{ 1137 struct gpt_disk_partitions *parts = (struct gpt_disk_partitions*)arg; 1138 1139 while (parts->dp.num_part > 0) { 1140 if (!gpt_delete_partition(&parts->dp, 0, NULL)) 1141 return false; 1142 } 1143 1144 return true; 1145} 1146 1147static bool 1148gpt_read_part(const char *disk, daddr_t start, struct gpt_part_entry *p) 1149{ 1150 char *textbuf, *t, *tt; 1151 static const char expected_hdr[] = "Details for index "; 1152 1153 /* run gpt show for this partition */ 1154 if (collect(T_OUTPUT, &textbuf, 1155 "gpt -r show -b %" PRIu64 " %s 2>/dev/null", start, disk) < 1) 1156 return false; 1157 1158 /* 1159 * gpt show should respond with single partition details, but will 1160 * fall back to "show -a" output if something is wrong 1161 */ 1162 t = strtok(textbuf, "\n"); /* first line is special */ 1163 if (strncmp(t, expected_hdr, sizeof(expected_hdr)-1) != 0) { 1164 free(textbuf); 1165 return false; 1166 } 1167 1168 /* parse output into "old" */ 1169 while ((t = strtok(NULL, "\n")) != NULL) { 1170 tt = strsep(&t, " \t"); 1171 if (strlen(tt) == 0) 1172 continue; 1173 gpt_add_info(p, tt, t, true); 1174 } 1175 free(textbuf); 1176 1177 return true; 1178} 1179 1180static bool 1181gpt_apply_attr(const char *disk, const char *cmd, off_t start, uint todo) 1182{ 1183 size_t i; 1184 char attr_str[STRSIZE]; 1185 1186 if (todo == 0) 1187 return true; 1188 1189 strcpy(attr_str, "-a "); 1190 for (i = 0; todo != 0; i++) { 1191 if (!(gpt_avail_attrs[i].flag & todo)) 1192 continue; 1193 todo &= ~gpt_avail_attrs[i].flag; 1194 if (attr_str[0]) 1195 strlcat(attr_str, ",", 1196 sizeof(attr_str)); 1197 strlcat(attr_str, 1198 gpt_avail_attrs[i].name, 1199 sizeof(attr_str)); 1200 } 1201 if (run_program(RUN_SILENT, 1202 "gpt %s %s -b %" PRIu64 " %s", cmd, attr_str, start, disk) != 0) 1203 return false; 1204 return true; 1205} 1206 1207/* 1208 * Modify an existing on-disk partition. 1209 * Start and size can not be changed here, caller needs to deal 1210 * with that kind of changes upfront. 1211 */ 1212static bool 1213gpt_modify_part(const char *disk, struct gpt_part_entry *p) 1214{ 1215 struct gpt_part_entry old; 1216 uint todo_set, todo_unset; 1217 1218 /* 1219 * Query current on-disk state 1220 */ 1221 memset(&old, 0, sizeof old); 1222 if (!gpt_read_part(disk, p->gp_start, &old)) 1223 return false; 1224 1225 /* Reject unsupported changes */ 1226 if (old.gp_start != p->gp_start || old.gp_size != p->gp_size) 1227 return false; 1228 1229 /* 1230 * GUID should never change, but the internal copy 1231 * may not yet know it. 1232 */ 1233 strcpy(p->gp_id, old.gp_id); 1234 1235 /* Check type */ 1236 if (p->gp_type != old.gp_type) { 1237 if (run_program(RUN_SILENT, 1238 "gpt label -b %" PRIu64 " -T %s %s", 1239 p->gp_start, p->gp_type->tid, disk) != 0) 1240 return false; 1241 } 1242 1243 /* Check label */ 1244 if (strcmp(p->gp_label, old.gp_label) != 0) { 1245 if (run_program(RUN_SILENT, 1246 "gpt label -b %" PRIu64 " -l \'%s\' %s", 1247 p->gp_start, p->gp_label, disk) != 0) 1248 return false; 1249 } 1250 1251 /* Check attributes */ 1252 if (p->gp_attr != old.gp_attr) { 1253 if (p->gp_attr == 0) { 1254 if (run_program(RUN_SILENT, 1255 "gpt set -N -b %" PRIu64 " %s", 1256 p->gp_start, disk) != 0) 1257 return false; 1258 } else { 1259 todo_set = (p->gp_attr ^ old.gp_attr) & p->gp_attr; 1260 todo_unset = (p->gp_attr ^ old.gp_attr) & old.gp_attr; 1261 if (!gpt_apply_attr(disk, "unset", p->gp_start, 1262 todo_unset)) 1263 return false; 1264 if (!gpt_apply_attr(disk, "set", p->gp_start, 1265 todo_set)) 1266 return false; 1267 } 1268 } 1269 1270 return true; 1271} 1272 1273/* 1274 * verbatim copy from sys/dev/dkwedge/dkwedge_bsdlabel.c: 1275 * map FS_* to wedge strings 1276 */ 1277static const char * 1278bsdlabel_fstype_to_str(uint8_t fstype) 1279{ 1280 const char *str; 1281 1282 /* 1283 * For each type known to FSTYPE_DEFN (from <sys/disklabel.h>), 1284 * a suitable case branch will convert the type number to a string. 1285 */ 1286 switch (fstype) { 1287#define FSTYPE_TO_STR_CASE(tag, number, name, fsck, mount) \ 1288 case __CONCAT(FS_,tag): str = __CONCAT(DKW_PTYPE_,tag); break; 1289 FSTYPE_DEFN(FSTYPE_TO_STR_CASE) 1290#undef FSTYPE_TO_STR_CASE 1291 default: str = NULL; break; 1292 } 1293 1294 return (str); 1295} 1296 1297static bool 1298gpt_add_wedge(const char *disk, struct gpt_part_entry *p) 1299{ 1300 struct dkwedge_info dkw; 1301 const char *tname; 1302 char diskpath[MAXPATHLEN]; 1303 int fd; 1304 1305 memset(&dkw, 0, sizeof(dkw)); 1306 tname = bsdlabel_fstype_to_str(p->fs_type); 1307 if (tname) 1308 strlcpy(dkw.dkw_ptype, tname, sizeof(dkw.dkw_ptype)); 1309 1310 strlcpy((char*)&dkw.dkw_wname, p->gp_id, sizeof(dkw.dkw_wname)); 1311 dkw.dkw_offset = p->gp_start; 1312 dkw.dkw_size = p->gp_size; 1313 if (dkw.dkw_wname[0] == 0) { 1314 if (p->gp_label[0] != 0) 1315 strlcpy((char*)&dkw.dkw_wname, 1316 p->gp_label, sizeof(dkw.dkw_wname)); 1317 } 1318 if (dkw.dkw_wname[0] == 0) { 1319 snprintf((char*)dkw.dkw_wname, sizeof dkw.dkw_wname, 1320 "%s_%" PRIi64 "@%" PRIi64, disk, p->gp_size, p->gp_start); 1321 } 1322 1323 fd = opendisk(disk, O_RDWR, diskpath, sizeof(diskpath), 0); 1324 if (fd < 0) 1325 return false; 1326 if (ioctl(fd, DIOCAWEDGE, &dkw) == -1) { 1327 close(fd); 1328 return false; 1329 } 1330 close(fd); 1331 1332 strlcpy(p->gp_dev_name, dkw.dkw_devname, sizeof(p->gp_dev_name)); 1333 p->gp_flags |= GPEF_WEDGE; 1334 return true; 1335} 1336 1337static void 1338escape_spaces(char *dest, const char *src) 1339{ 1340 unsigned char c; 1341 1342 while (*src) { 1343 c = *src++; 1344 if (isspace(c) || c == '\\') 1345 *dest++ = '\\'; 1346 *dest++ = c; 1347 } 1348 *dest = 0; 1349} 1350 1351static bool 1352gpt_get_part_device(const struct disk_partitions *arg, 1353 part_id id, char *devname, size_t max_devname_len, int *part, 1354 enum dev_name_usage usage, bool with_path, bool life) 1355{ 1356 const struct gpt_disk_partitions *parts = 1357 (const struct gpt_disk_partitions*)arg; 1358 struct gpt_part_entry *p = parts->partitions; 1359 char tmpname[GPT_LABEL_LEN*2]; 1360 part_id no; 1361 1362 1363 for (no = 0; p != NULL && no < id; no++) 1364 p = p->gp_next; 1365 1366 if (no != id || p == NULL) 1367 return false; 1368 1369 if (part) 1370 *part = -1; 1371 1372 if (usage == logical_name && p->gp_label[0] == 0 && p->gp_id[0] == 0) 1373 usage = plain_name; 1374 if (usage == plain_name || usage == raw_dev_name) 1375 life = true; 1376 if (!(p->gp_flags & GPEF_WEDGE) && life) 1377 gpt_add_wedge(arg->disk, p); 1378 1379 switch (usage) { 1380 case logical_name: 1381 if (p->gp_label[0] != 0) { 1382 escape_spaces(tmpname, p->gp_label); 1383 snprintf(devname, max_devname_len, 1384 "NAME=%s", tmpname); 1385 } else { 1386 snprintf(devname, max_devname_len, 1387 "NAME=%s", p->gp_id); 1388 } 1389 break; 1390 case plain_name: 1391 assert(p->gp_flags & GPEF_WEDGE); 1392 if (with_path) 1393 snprintf(devname, max_devname_len, _PATH_DEV "%s", 1394 p->gp_dev_name); 1395 else 1396 strlcpy(devname, p->gp_dev_name, max_devname_len); 1397 break; 1398 case raw_dev_name: 1399 assert(p->gp_flags & GPEF_WEDGE); 1400 if (with_path) 1401 snprintf(devname, max_devname_len, _PATH_DEV "r%s", 1402 p->gp_dev_name); 1403 else 1404 snprintf(devname, max_devname_len, "r%s", 1405 p->gp_dev_name); 1406 break; 1407 default: 1408 return false; 1409 } 1410 1411 return true; 1412} 1413 1414static bool 1415gpt_write_to_disk(struct disk_partitions *arg) 1416{ 1417 struct gpt_disk_partitions *parts = (struct gpt_disk_partitions*)arg; 1418 struct gpt_part_entry *p, *n; 1419 char label_arg[sizeof(p->gp_label) + 10]; 1420 char diskpath[MAXPATHLEN]; 1421 int fd, bits = 0; 1422 bool root_is_new = false, efi_is_new = false; 1423 part_id root_id = NO_PART, efi_id = NO_PART, pno; 1424 1425 /* 1426 * Remove all wedges on this disk - they may become invalid and we 1427 * have no easy way to associate them with the partitioning data. 1428 * Instead we will explicitly request creation of wedges on demand 1429 * later. 1430 */ 1431 fd = opendisk(arg->disk, O_RDWR, diskpath, sizeof(diskpath), 0); 1432 if (fd < 0) 1433 return false; 1434 if (ioctl(fd, DIOCRMWEDGES, &bits) == -1) 1435 return false; 1436 close(fd); 1437 1438 /* 1439 * Collect first root and efi partition (if available), clear 1440 * "have wedge" flags. 1441 */ 1442 for (pno = 0, p = parts->partitions; p != NULL; p = p->gp_next, pno++) { 1443 p->gp_flags &= ~GPEF_WEDGE; 1444 if (root_id == NO_PART && p->gp_type != NULL) { 1445 if (p->gp_type->gent.generic_ptype == PT_root && 1446 p->gp_start == pm->ptstart) { 1447 root_id = pno; 1448 root_is_new = !(p->gp_flags & GPEF_ON_DISK); 1449 } else if (efi_id == NO_PART && 1450 p->gp_type->gent.generic_ptype == PT_EFI_SYSTEM) { 1451 efi_id = pno; 1452 efi_is_new = !(p->gp_flags & GPEF_ON_DISK); 1453 } 1454 } 1455 } 1456 1457 /* 1458 * If no GPT on disk yet, create it. 1459 */ 1460 if (!parts->has_gpt) { 1461 char limit[30]; 1462 1463 if (parts->max_num_parts > 0) 1464 sprintf(limit, "-p %zu", parts->max_num_parts); 1465 else 1466 limit[0] = 0; 1467 if (run_program(RUN_SILENT, "gpt create %s %s", 1468 limit, parts->dp.disk)) 1469 return false; 1470 parts->has_gpt = true; 1471 } 1472 1473 /* 1474 * Delete all old partitions 1475 */ 1476 for (p = parts->obsolete; p != NULL; p = n) { 1477 run_program(RUN_SILENT, "gpt -n remove -b %" PRIu64 " %s", 1478 p->gp_start, arg->disk); 1479 n = p->gp_next; 1480 free(p); 1481 } 1482 parts->obsolete = NULL; 1483 1484 /* 1485 * Modify existing but changed partitions 1486 */ 1487 for (p = parts->partitions; p != NULL; p = p->gp_next) { 1488 if (!(p->gp_flags & GPEF_ON_DISK)) 1489 continue; 1490 1491 if (p->gp_flags & GPEF_RESIZED) { 1492 run_program(RUN_SILENT, 1493 "gpt -n resize -b %" PRIu64 " -s %" PRIu64 "s %s", 1494 p->gp_start, p->gp_size, arg->disk); 1495 p->gp_flags &= ~GPEF_RESIZED; 1496 } 1497 1498 if (!(p->gp_flags & GPEF_MODIFIED)) 1499 continue; 1500 1501 if (!gpt_modify_part(parts->dp.disk, p)) 1502 return false; 1503 } 1504 1505 /* 1506 * Add new partitions 1507 */ 1508 for (p = parts->partitions; p != NULL; p = p->gp_next) { 1509 if (p->gp_flags & GPEF_ON_DISK) 1510 continue; 1511 if (!(p->gp_flags & GPEF_MODIFIED)) 1512 continue; 1513 1514 if (p->gp_label[0] == 0) 1515 label_arg[0] = 0; 1516 else 1517 sprintf(label_arg, "-l \'%s\'", p->gp_label); 1518 1519 if (p->gp_type != NULL) 1520 run_program(RUN_SILENT, 1521 "gpt -n add -b %" PRIu64 " -s %" PRIu64 1522 "s -t %s %s %s", 1523 p->gp_start, p->gp_size, p->gp_type->tid, 1524 label_arg, arg->disk); 1525 else 1526 run_program(RUN_SILENT, 1527 "gpt -n add -b %" PRIu64 " -s %" PRIu64 1528 "s %s %s", 1529 p->gp_start, p->gp_size, label_arg, arg->disk); 1530 gpt_apply_attr(arg->disk, "set", p->gp_start, p->gp_attr); 1531 gpt_read_part(arg->disk, p->gp_start, p); 1532 p->gp_flags |= GPEF_ON_DISK; 1533 } 1534 1535 /* 1536 * Additional MD bootloader magic... 1537 */ 1538 if (!md_gpt_post_write(&parts->dp, root_id, root_is_new, efi_id, 1539 efi_is_new)) 1540 return false; 1541 1542 return true; 1543} 1544 1545static part_id 1546gpt_find_by_name(struct disk_partitions *arg, const char *name) 1547{ 1548 struct gpt_disk_partitions *parts = (struct gpt_disk_partitions*)arg; 1549 struct gpt_part_entry *p; 1550 part_id pno; 1551 1552 for (pno = 0, p = parts->partitions; p != NULL; 1553 p = p->gp_next, pno++) { 1554 if (strcmp(p->gp_label, name) == 0) 1555 return pno; 1556 if (strcmp(p->gp_id, name) == 0) 1557 return pno; 1558 } 1559 1560 return NO_PART; 1561} 1562 1563bool 1564gpt_parts_check(void) 1565{ 1566 1567 check_available_binaries(); 1568 1569 return have_gpt && have_dk; 1570} 1571 1572static void 1573gpt_free(struct disk_partitions *arg) 1574{ 1575 struct gpt_disk_partitions *parts = (struct gpt_disk_partitions*)arg; 1576 struct gpt_part_entry *p, *n; 1577 1578 assert(parts != NULL); 1579 for (p = parts->partitions; p != NULL; p = n) { 1580 free(__UNCONST(p->last_mounted)); 1581 n = p->gp_next; 1582 free(p); 1583 } 1584 free(__UNCONST(parts->dp.disk)); 1585 free(parts); 1586} 1587 1588static bool 1589gpt_custom_attribute_writable(const struct disk_partitions *arg, 1590 part_id ptn, size_t attr_no) 1591{ 1592 const struct gpt_disk_partitions *parts = 1593 (const struct gpt_disk_partitions*)arg; 1594 size_t i; 1595 struct gpt_part_entry *p; 1596 1597 if (attr_no >= arg->pscheme->custom_attribute_count) 1598 return false; 1599 1600 const msg label = arg->pscheme->custom_attributes[attr_no].label; 1601 1602 /* we can not edit the uuid attribute */ 1603 if (label == MSG_ptn_uuid) 1604 return false; 1605 1606 /* the label is always editable */ 1607 if (label == MSG_ptn_label) 1608 return true; 1609 1610 /* the GPT type is read only */ 1611 if (label == MSG_ptn_gpt_type) 1612 return false; 1613 1614 /* BOOTME makes no sense on swap partitions */ 1615 for (i = 0, p = parts->partitions; p != NULL; i++, p = p->gp_next) 1616 if (i == ptn) 1617 break; 1618 1619 if (p == NULL) 1620 return false; 1621 1622 if (p->fs_type == FS_SWAP || 1623 (p->gp_type != NULL && p->gp_type->gent.generic_ptype == PT_swap)) 1624 return false; 1625 1626 return true; 1627} 1628 1629static const char * 1630gpt_get_label_str(const struct disk_partitions *arg, part_id ptn) 1631{ 1632 const struct gpt_disk_partitions *parts = 1633 (const struct gpt_disk_partitions*)arg; 1634 size_t i; 1635 struct gpt_part_entry *p; 1636 1637 for (i = 0, p = parts->partitions; p != NULL; i++, p = p->gp_next) 1638 if (i == ptn) 1639 break; 1640 1641 if (p == NULL) 1642 return NULL; 1643 1644 if (p->gp_label[0] != 0) 1645 return p->gp_label; 1646 return p->gp_id; 1647} 1648 1649static bool 1650gpt_format_custom_attribute(const struct disk_partitions *arg, 1651 part_id ptn, size_t attr_no, const struct disk_part_info *info, 1652 char *out, size_t out_space) 1653{ 1654 const struct gpt_disk_partitions *parts = 1655 (const struct gpt_disk_partitions*)arg; 1656 size_t i; 1657 struct gpt_part_entry *p, data; 1658 1659 for (i = 0, p = parts->partitions; p != NULL; i++, p = p->gp_next) 1660 if (i == ptn) 1661 break; 1662 1663 if (p == NULL) 1664 return false; 1665 1666 if (attr_no >= parts->dp.pscheme->custom_attribute_count) 1667 return false; 1668 1669 const msg label = parts->dp.pscheme->custom_attributes[attr_no].label; 1670 1671 if (info != NULL) { 1672 data = *p; 1673 gpt_info_to_part(&data, info, NULL); 1674 p = &data; 1675 } 1676 1677 if (label == MSG_ptn_label) 1678 strlcpy(out, p->gp_label, out_space); 1679 else if (label == MSG_ptn_uuid) 1680 strlcpy(out, p->gp_id, out_space); 1681 else if (label == MSG_ptn_gpt_type) { 1682 if (p->gp_type != NULL) 1683 strlcpy(out, p->gp_type->gent.description, out_space); 1684 else if (out_space > 1) 1685 out[0] = 0; 1686 } else if (label == MSG_ptn_boot) 1687 strlcpy(out, msg_string(p->gp_attr & GPT_ATTR_BOOT ? 1688 MSG_Yes : MSG_No), out_space); 1689 else 1690 return false; 1691 1692 return true; 1693} 1694 1695static bool 1696gpt_custom_attribute_toggle(struct disk_partitions *arg, 1697 part_id ptn, size_t attr_no) 1698{ 1699 const struct gpt_disk_partitions *parts = 1700 (const struct gpt_disk_partitions*)arg; 1701 size_t i; 1702 struct gpt_part_entry *p; 1703 1704 for (i = 0, p = parts->partitions; p != NULL; i++, p = p->gp_next) 1705 if (i == ptn) 1706 break; 1707 1708 if (p == NULL) 1709 return false; 1710 1711 if (attr_no >= parts->dp.pscheme->custom_attribute_count) 1712 return false; 1713 1714 const msg label = parts->dp.pscheme->custom_attributes[attr_no].label; 1715 if (label != MSG_ptn_boot) 1716 return false; 1717 1718 if (p->gp_attr & GPT_ATTR_BOOT) { 1719 p->gp_attr &= ~GPT_ATTR_BOOT; 1720 } else { 1721 for (i = 0, p = parts->partitions; p != NULL; 1722 i++, p = p->gp_next) 1723 if (i == ptn) 1724 p->gp_attr |= GPT_ATTR_BOOT; 1725 else 1726 p->gp_attr &= ~GPT_ATTR_BOOT; 1727 } 1728 return true; 1729} 1730 1731static bool 1732gpt_custom_attribute_set_str(struct disk_partitions *arg, 1733 part_id ptn, size_t attr_no, const char *new_val) 1734{ 1735 const struct gpt_disk_partitions *parts = 1736 (const struct gpt_disk_partitions*)arg; 1737 size_t i; 1738 struct gpt_part_entry *p; 1739 1740 for (i = 0, p = parts->partitions; p != NULL; i++, p = p->gp_next) 1741 if (i == ptn) 1742 break; 1743 1744 if (p == NULL) 1745 return false; 1746 1747 if (attr_no >= parts->dp.pscheme->custom_attribute_count) 1748 return false; 1749 1750 const msg label = parts->dp.pscheme->custom_attributes[attr_no].label; 1751 1752 if (label != MSG_ptn_label) 1753 return false; 1754 1755 strlcpy(p->gp_label, new_val, sizeof(p->gp_label)); 1756 return true; 1757} 1758 1759static bool 1760gpt_have_boot_support(const char *disk) 1761{ 1762#ifdef HAVE_GPT_BOOT 1763 return true; 1764#else 1765 return false; 1766#endif 1767} 1768 1769const struct disk_part_custom_attribute gpt_custom_attrs[] = { 1770 { .label = MSG_ptn_label, .type = pet_str }, 1771 { .label = MSG_ptn_uuid, .type = pet_str }, 1772 { .label = MSG_ptn_gpt_type, .type = pet_str }, 1773 { .label = MSG_ptn_boot, .type = pet_bool }, 1774}; 1775 1776const struct disk_partitioning_scheme 1777gpt_parts = { 1778 .name = MSG_parttype_gpt, 1779 .short_name = MSG_parttype_gpt_short, 1780 .part_flag_desc = MSG_gpt_flag_desc, 1781 .custom_attribute_count = __arraycount(gpt_custom_attrs), 1782 .custom_attributes = gpt_custom_attrs, 1783 .get_part_types_count = gpt_type_count, 1784 .get_part_type = gpt_get_ptype, 1785 .get_generic_part_type = gpt_get_generic_type, 1786 .get_fs_part_type = gpt_get_fs_part_type, 1787 .get_default_fstype = gpt_get_default_fstype, 1788 .create_custom_part_type = gpt_create_custom_part_type, 1789 .create_unknown_part_type = gpt_create_unknown_part_type, 1790 .get_part_alignment = gpt_get_part_alignment, 1791 .read_from_disk = gpt_read_from_disk, 1792 .get_cylinder_size = gpt_cyl_size, 1793 .create_new_for_disk = gpt_create_new, 1794 .have_boot_support = gpt_have_boot_support, 1795 .find_by_name = gpt_find_by_name, 1796 .can_add_partition = gpt_can_add_partition, 1797 .custom_attribute_writable = gpt_custom_attribute_writable, 1798 .format_custom_attribute = gpt_format_custom_attribute, 1799 .custom_attribute_toggle = gpt_custom_attribute_toggle, 1800 .custom_attribute_set_str = gpt_custom_attribute_set_str, 1801 .other_partition_identifier = gpt_get_label_str, 1802 .get_part_device = gpt_get_part_device, 1803 .max_free_space_at = gpt_max_free_space_at, 1804 .get_free_spaces = gpt_get_free_spaces, 1805 .adapt_foreign_part_info = generic_adapt_foreign_part_info, 1806 .get_part_info = gpt_get_part_info, 1807 .get_part_attr_str = gpt_get_part_attr_str, 1808 .set_part_info = gpt_set_part_info, 1809 .add_partition = gpt_add_part, 1810 .delete_all_partitions = gpt_delete_all_partitions, 1811 .delete_partition = gpt_delete_partition, 1812 .write_to_disk = gpt_write_to_disk, 1813 .free = gpt_free, 1814 .cleanup = gpt_cleanup, 1815}; 1816