1 /* $NetBSD: gpt.c,v 1.15 2020/01/15 19:36:30 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 42 bool 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 69 struct gpt_attr_desc { 70 const char *name; 71 uint flag; 72 }; 73 static 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 83 struct gpt_ptype_desc { 84 struct part_type_desc gent; 85 char tid[GUID_STR_LEN]; 86 uint fsflags, default_fs_type; 87 }; 88 89 static const 90 struct { 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 }; 117 118 static size_t gpt_ptype_cnt = 0, gpt_ptype_alloc = 0; 119 static struct gpt_ptype_desc *gpt_ptype_descs = NULL; 120 121 /* "well" known types with special handling */ 122 static const struct part_type_desc *gpt_native_root; 123 124 /* similar to struct gpt_ent, but matching our needs */ 125 struct 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 }; 141 142 static const struct gpt_ptype_desc *gpt_find_native_type( 143 const struct part_type_desc *gent); 144 static const struct gpt_ptype_desc *gpt_find_guid_type(const char*); 145 static bool 146 gpt_info_to_part(struct gpt_part_entry *p, const struct disk_part_info *info, 147 const char **err_msg); 148 149 const struct disk_partitioning_scheme gpt_parts; 150 struct 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 */ 170 static void 171 gpt_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 */ 197 static void 198 gpt_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 */ 241 static void 242 update_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 } 256 257 static struct disk_partitions * 258 gpt_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 } 441 442 static size_t 443 gpt_cyl_size(const struct disk_partitions *arg) 444 { 445 return MEG / 512; 446 } 447 448 static struct disk_partitions * 449 gpt_create_new(const char *disk, daddr_t start, daddr_t len, daddr_t total, 450 bool is_boot_drive, struct disk_partitions *parent) 451 { 452 struct gpt_disk_partitions *parts; 453 454 if (start != 0) { 455 assert(0); 456 return NULL; 457 } 458 459 parts = calloc(1, sizeof(*parts)); 460 if (!parts) 461 return NULL; 462 463 parts->dp.pscheme = &gpt_parts; 464 parts->dp.disk = strdup(disk); 465 466 gpt_md_init(is_boot_drive, &parts->max_num_parts, &parts->prologue, 467 &parts->epilogue); 468 469 parts->dp.disk_start = start; 470 parts->dp.disk_size = len; 471 parts->dp.free_space = len - start - parts->prologue - parts->epilogue; 472 parts->has_gpt = false; 473 474 return &parts->dp; 475 } 476 477 static bool 478 gpt_get_part_info(const struct disk_partitions *arg, part_id id, 479 struct disk_part_info *info) 480 { 481 static const struct part_type_desc gpt_unknown_type = 482 { .generic_ptype = PT_undef, 483 .short_desc = "<unknown>" }; 484 const struct gpt_disk_partitions *parts = 485 (const struct gpt_disk_partitions*)arg; 486 const struct gpt_part_entry *p = parts->partitions; 487 part_id no; 488 489 for (no = 0; p != NULL && no < id; no++) 490 p = p->gp_next; 491 492 if (no != id || p == NULL) 493 return false; 494 495 memset(info, 0, sizeof(*info)); 496 info->start = p->gp_start; 497 info->size = p->gp_size; 498 if (p->gp_type) 499 info->nat_type = &p->gp_type->gent; 500 else 501 info->nat_type = &gpt_unknown_type; 502 info->last_mounted = p->last_mounted; 503 info->fs_type = p->fs_type; 504 info->fs_sub_type = p->fs_sub_type; 505 506 return true; 507 } 508 509 static bool 510 gpt_get_part_attr_str(const struct disk_partitions *arg, part_id id, 511 char *str, size_t avail_space) 512 { 513 const struct gpt_disk_partitions *parts = 514 (const struct gpt_disk_partitions*)arg; 515 const struct gpt_part_entry *p = parts->partitions; 516 part_id no; 517 static const char *flags = NULL; 518 519 for (no = 0; p != NULL && no < id; no++) 520 p = p->gp_next; 521 522 if (no != id || p == NULL) 523 return false; 524 525 if (flags == NULL) 526 flags = msg_string(MSG_gpt_flags); 527 528 if (avail_space < 2) 529 return false; 530 531 if (p->gp_attr & GPT_ATTR_BOOT) 532 *str++ = flags[0]; 533 *str = 0; 534 535 return true; 536 } 537 538 /* 539 * Find insert position and check for duplicates. 540 * If all goes well, insert the new "entry" in the "list". 541 * If there are collisions, report "no free space". 542 * We keep all lists sorted by start sector number, 543 */ 544 static bool 545 gpt_insert_part_into_list(struct gpt_disk_partitions *parts, 546 struct gpt_part_entry **list, 547 struct gpt_part_entry *entry, const char **err_msg) 548 { 549 struct gpt_part_entry *p, *last; 550 551 /* find the first entry past the new one (if any) */ 552 for (last = NULL, p = *list; p != NULL; last = p, p = p->gp_next) { 553 if (p->gp_start > entry->gp_start) 554 break; 555 } 556 557 /* check if last partition overlaps with new one */ 558 if (last) { 559 if (last->gp_start + last->gp_size > entry->gp_start) { 560 if (err_msg) 561 *err_msg = msg_string(MSG_No_free_space); 562 return false; 563 } 564 } 565 566 if (p == NULL) { 567 entry->gp_next = NULL; 568 if (last != NULL) { 569 last->gp_next = entry; 570 } 571 } else { 572 /* check if new entry overlaps with next */ 573 if (entry->gp_start + entry->gp_size > p->gp_start) { 574 if (err_msg) 575 *err_msg = msg_string(MSG_No_free_space); 576 return false; 577 } 578 579 entry->gp_next = p; 580 if (last != NULL) 581 last->gp_next = entry; 582 else 583 *list = entry; 584 } 585 if (*list == NULL) 586 *list = entry; 587 588 return true; 589 } 590 591 static bool 592 gpt_set_part_info(struct disk_partitions *arg, part_id id, 593 const struct disk_part_info *info, const char **err_msg) 594 { 595 struct gpt_disk_partitions *parts = 596 (struct gpt_disk_partitions*)arg; 597 struct gpt_part_entry *p = parts->partitions, *n; 598 part_id no; 599 daddr_t lendiff; 600 601 for (no = 0; p != NULL && no < id; no++) 602 p = p->gp_next; 603 604 if (no != id || p == NULL) 605 return false; 606 607 if ((p->gp_flags & GPEF_ON_DISK)) { 608 if (info->start != p->gp_start) { 609 /* partition moved, we need to delete and re-add */ 610 n = calloc(1, sizeof(*n)); 611 if (n == NULL) { 612 if (err_msg) 613 *err_msg = err_outofmem; 614 return false; 615 } 616 *n = *p; 617 p->gp_flags &= ~GPEF_ON_DISK; 618 if (!gpt_insert_part_into_list(parts, &parts->obsolete, 619 n, err_msg)) 620 return false; 621 } else if (info->size != p->gp_size) { 622 p->gp_flags |= GPEF_RESIZED; 623 } 624 } 625 626 p->gp_flags |= GPEF_MODIFIED; 627 628 lendiff = info->size - p->gp_size; 629 parts->dp.free_space -= lendiff; 630 return gpt_info_to_part(p, info, err_msg); 631 } 632 633 static size_t 634 gpt_get_free_spaces_internal(const struct gpt_disk_partitions *parts, 635 struct disk_part_free_space *result, size_t max_num_result, 636 daddr_t min_space_size, daddr_t align, daddr_t start, daddr_t ignore) 637 { 638 size_t cnt = 0; 639 daddr_t s, e, from, size, end_of_disk; 640 struct gpt_part_entry *p; 641 642 if (align > 1) 643 start = max(roundup(start, align), align); 644 if (start < 0 || start < (daddr_t)parts->prologue) 645 start = parts->prologue; 646 if (parts->dp.disk_start != 0 && parts->dp.disk_start > start) 647 start = parts->dp.disk_start; 648 if (min_space_size < 1) 649 min_space_size = 1; 650 end_of_disk = parts->dp.disk_start + parts->dp.disk_size 651 - parts->epilogue; 652 from = start; 653 while (from < end_of_disk && cnt < max_num_result) { 654 again: 655 size = parts->dp.disk_start + parts->dp.disk_size - from; 656 start = from; 657 if (start + size > end_of_disk) 658 size = end_of_disk - start; 659 for (p = parts->partitions; p != NULL; p = p->gp_next) { 660 s = p->gp_start; 661 e = p->gp_size + s; 662 if (s == ignore) 663 continue; 664 if (e < from) 665 continue; 666 if (s <= from && e > from) { 667 if (e - 1 >= end_of_disk) 668 return cnt; 669 from = e + 1; 670 if (align > 1) { 671 from = max(roundup(from, align), align); 672 if (from >= end_of_disk) { 673 size = 0; 674 break; 675 } 676 } 677 goto again; 678 } 679 if (s > from && s - from < size) { 680 size = s - from; 681 } 682 } 683 if (size >= min_space_size) { 684 result->start = start; 685 result->size = size; 686 result++; 687 cnt++; 688 } 689 from += size + 1; 690 if (align > 1) 691 from = max(roundup(from, align), align); 692 } 693 694 return cnt; 695 } 696 697 static daddr_t 698 gpt_max_free_space_at(const struct disk_partitions *arg, daddr_t start) 699 { 700 const struct gpt_disk_partitions *parts = 701 (const struct gpt_disk_partitions*)arg; 702 struct disk_part_free_space space; 703 704 if (gpt_get_free_spaces_internal(parts, &space, 1, 1, 0, 705 start, start) == 1) 706 return space.size; 707 708 return 0; 709 } 710 711 static size_t 712 gpt_get_free_spaces(const struct disk_partitions *arg, 713 struct disk_part_free_space *result, size_t max_num_result, 714 daddr_t min_space_size, daddr_t align, daddr_t start, 715 daddr_t ignore) 716 { 717 const struct gpt_disk_partitions *parts = 718 (const struct gpt_disk_partitions*)arg; 719 720 return gpt_get_free_spaces_internal(parts, result, 721 max_num_result, min_space_size, align, start, ignore); 722 } 723 724 static void 725 gpt_match_ptype(const char *name, struct gpt_ptype_desc *t) 726 { 727 size_t i; 728 729 for (i = 0; i < __arraycount(gpt_fs_types); i++) { 730 if (strcmp(name, gpt_fs_types[i].name) == 0) { 731 t->gent.generic_ptype = gpt_fs_types[i].ptype; 732 t->fsflags = gpt_fs_types[i].fsflags; 733 t->default_fs_type = gpt_fs_types[i].fstype; 734 735 /* recongnize special entries */ 736 if (gpt_native_root == NULL && i == 0) 737 gpt_native_root = &t->gent; 738 739 return; 740 } 741 } 742 743 t->gent.generic_ptype = PT_unknown; 744 t->fsflags = 0; 745 t->default_fs_type = FS_BSDFFS; 746 } 747 748 static void 749 gpt_internal_add_ptype(const char *uid, const char *name, const char *desc) 750 { 751 if (gpt_ptype_cnt >= gpt_ptype_alloc) { 752 gpt_ptype_alloc = gpt_ptype_alloc ? 2*gpt_ptype_alloc 753 : GPT_PTYPE_ALLOC; 754 struct gpt_ptype_desc *nptypes = realloc(gpt_ptype_descs, 755 gpt_ptype_alloc*sizeof(*gpt_ptype_descs)); 756 if (nptypes == 0) 757 errx(EXIT_FAILURE, "out of memory"); 758 gpt_ptype_descs = nptypes; 759 } 760 761 strlcpy(gpt_ptype_descs[gpt_ptype_cnt].tid, uid, 762 sizeof(gpt_ptype_descs[gpt_ptype_cnt].tid)); 763 gpt_ptype_descs[gpt_ptype_cnt].gent.short_desc = strdup(name); 764 gpt_ptype_descs[gpt_ptype_cnt].gent.description = strdup(desc); 765 gpt_match_ptype(name, &gpt_ptype_descs[gpt_ptype_cnt]); 766 gpt_ptype_cnt++; 767 } 768 769 static void 770 gpt_init_ptypes(void) 771 { 772 if (gpt_ptype_cnt == 0) 773 gpt_uuid_query(gpt_internal_add_ptype); 774 } 775 776 static void 777 gpt_cleanup(void) 778 { 779 /* free all of gpt_ptype_descs */ 780 for (size_t i = 0; i < gpt_ptype_cnt; i++) { 781 free(__UNCONST(gpt_ptype_descs[i].gent.short_desc)); 782 free(__UNCONST(gpt_ptype_descs[i].gent.description)); 783 } 784 free(gpt_ptype_descs); 785 gpt_ptype_descs = NULL; 786 gpt_ptype_cnt = gpt_ptype_alloc = 0; 787 } 788 789 static size_t 790 gpt_type_count(void) 791 { 792 if (gpt_ptype_cnt == 0) 793 gpt_init_ptypes(); 794 795 return gpt_ptype_cnt; 796 } 797 798 static const struct part_type_desc * 799 gpt_get_ptype(size_t ndx) 800 { 801 if (gpt_ptype_cnt == 0) 802 gpt_init_ptypes(); 803 804 if (ndx >= gpt_ptype_cnt) 805 return NULL; 806 807 return &gpt_ptype_descs[ndx].gent; 808 } 809 810 static const struct part_type_desc * 811 gpt_get_generic_type(enum part_type gent) 812 { 813 if (gpt_ptype_cnt == 0) 814 gpt_init_ptypes(); 815 816 if (gent == PT_root) 817 return gpt_native_root; 818 if (gent == PT_unknown) 819 return NULL; 820 821 for (size_t i = 0; i < gpt_ptype_cnt; i++) 822 if (gpt_ptype_descs[i].gent.generic_ptype == gent) 823 return &gpt_ptype_descs[i].gent; 824 825 return NULL; 826 } 827 828 static const struct gpt_ptype_desc * 829 gpt_find_native_type(const struct part_type_desc *gent) 830 { 831 if (gpt_ptype_cnt == 0) 832 gpt_init_ptypes(); 833 834 if (gent == NULL) 835 return NULL; 836 837 for (size_t i = 0; i < gpt_ptype_cnt; i++) 838 if (gent == &gpt_ptype_descs[i].gent) 839 return &gpt_ptype_descs[i]; 840 841 gent = gpt_get_generic_type(gent->generic_ptype); 842 if (gent == NULL) 843 return NULL; 844 845 /* this can not recurse deeper than once, we would not have found a 846 * generic type a few lines above if it would. */ 847 return gpt_find_native_type(gent); 848 } 849 850 static const struct gpt_ptype_desc * 851 gpt_find_guid_type(const char *uid) 852 { 853 if (gpt_ptype_cnt == 0) 854 gpt_init_ptypes(); 855 856 if (uid == NULL || uid[0] == 0) 857 return NULL; 858 859 for (size_t i = 0; i < gpt_ptype_cnt; i++) 860 if (strcmp(gpt_ptype_descs[i].tid, uid) == 0) 861 return &gpt_ptype_descs[i]; 862 863 return NULL; 864 } 865 866 static const struct part_type_desc * 867 gpt_find_type(const char *desc) 868 { 869 if (gpt_ptype_cnt == 0) 870 gpt_init_ptypes(); 871 872 if (desc == NULL || desc[0] == 0) 873 return NULL; 874 875 for (size_t i = 0; i < gpt_ptype_cnt; i++) 876 if (strcmp(gpt_ptype_descs[i].gent.short_desc, desc) == 0) 877 return &gpt_ptype_descs[i].gent; 878 879 return NULL; 880 } 881 882 static const struct part_type_desc * 883 gpt_get_fs_part_type(enum part_type pt, unsigned fstype, unsigned fs_sub_type) 884 { 885 size_t i; 886 887 /* Try with complete match (including part_type) first */ 888 for (i = 0; i < __arraycount(gpt_fs_types); i++) 889 if (fstype == gpt_fs_types[i].fstype && 890 pt == gpt_fs_types[i].ptype) 891 return gpt_find_type(gpt_fs_types[i].name); 892 893 /* If that did not work, ignore part_type */ 894 for (i = 0; i < __arraycount(gpt_fs_types); i++) 895 if (fstype == gpt_fs_types[i].fstype) 896 return gpt_find_type(gpt_fs_types[i].name); 897 898 return NULL; 899 } 900 901 static bool 902 gpt_get_default_fstype(const struct part_type_desc *nat_type, 903 unsigned *fstype, unsigned *fs_sub_type) 904 { 905 const struct gpt_ptype_desc *gtype; 906 907 gtype = gpt_find_native_type(nat_type); 908 if (gtype == NULL) 909 return false; 910 911 *fstype = gtype->default_fs_type; 912 #ifdef DEFAULT_UFS2 913 if (gtype->default_fs_type == FS_BSDFFS) 914 *fs_sub_type = 2; 915 else 916 #endif 917 *fs_sub_type = 0; 918 return true; 919 } 920 921 static const struct part_type_desc * 922 gpt_get_uuid_part_type(const uuid_t *id) 923 { 924 char str[GUID_STR_LEN], desc[GUID_STR_LEN + MENUSTRSIZE]; 925 const struct gpt_ptype_desc *t; 926 char *guid = NULL; 927 uint32_t err; 928 929 uuid_to_string(id, &guid, &err); 930 strlcpy(str, err == uuid_s_ok ? guid : "-", sizeof str); 931 free(guid); 932 933 t = gpt_find_guid_type(str); 934 if (t == NULL) { 935 snprintf(desc, sizeof desc, "%s (%s)", 936 msg_string(MSG_custom_type), str); 937 gpt_internal_add_ptype(str, str, desc); 938 t = gpt_find_guid_type(str); 939 assert(t != NULL); 940 } 941 return &t->gent; 942 } 943 944 static const struct part_type_desc * 945 gpt_create_custom_part_type(const char *custom, const char **err_msg) 946 { 947 uuid_t id; 948 uint32_t err; 949 950 uuid_from_string(custom, &id, &err); 951 if (err_msg != NULL && 952 (err == uuid_s_invalid_string_uuid || err == uuid_s_bad_version)) { 953 *err_msg = MSG_invalid_guid; 954 return NULL; 955 } 956 if (err != uuid_s_ok) 957 return NULL; 958 959 return gpt_get_uuid_part_type(&id); 960 } 961 962 static const struct part_type_desc * 963 gpt_create_unknown_part_type(void) 964 { 965 uuid_t id; 966 uint32_t err; 967 968 uuid_create(&id, &err); 969 if (err != uuid_s_ok) 970 return NULL; 971 972 return gpt_get_uuid_part_type(&id); 973 } 974 975 static daddr_t 976 gpt_get_part_alignment(const struct disk_partitions *parts) 977 { 978 979 assert(parts->disk_size > 0); 980 if (parts->disk_size < 0) 981 return 1; 982 983 /* Use 1MB offset/alignemnt for large (>128GB) disks */ 984 if (parts->disk_size > HUGE_DISK_SIZE) 985 return 2048; 986 else if (parts->disk_size > TINY_DISK_SIZE) 987 return 64; 988 else 989 return 4; 990 } 991 992 static bool 993 gpt_can_add_partition(const struct disk_partitions *arg) 994 { 995 const struct gpt_disk_partitions *parts = 996 (const struct gpt_disk_partitions*)arg; 997 struct disk_part_free_space space; 998 daddr_t align; 999 1000 if (parts->dp.num_part >= parts->max_num_parts) 1001 return false; 1002 1003 align = gpt_get_part_alignment(arg); 1004 if (parts->dp.free_space <= align) 1005 return false; 1006 1007 if (gpt_get_free_spaces_internal(parts, &space, 1, align, align, 1008 0, -1) < 1) 1009 return false; 1010 1011 return true; 1012 } 1013 1014 static bool 1015 gpt_info_to_part(struct gpt_part_entry *p, const struct disk_part_info *info, 1016 const char **err_msg) 1017 { 1018 p->gp_type = gpt_find_native_type(info->nat_type); 1019 p->gp_start = info->start; 1020 p->gp_size = info->size; 1021 if (info->last_mounted != NULL && info->last_mounted != 1022 p->last_mounted) { 1023 free(__UNCONST(p->last_mounted)); 1024 p->last_mounted = strdup(info->last_mounted); 1025 } 1026 p->fs_type = info->fs_type; 1027 p->fs_sub_type = info->fs_sub_type; 1028 1029 return true; 1030 } 1031 1032 static part_id 1033 gpt_add_part(struct disk_partitions *arg, 1034 const struct disk_part_info *info, const char **err_msg) 1035 { 1036 struct gpt_disk_partitions *parts = 1037 (struct gpt_disk_partitions*)arg; 1038 struct disk_part_free_space space; 1039 struct disk_part_info data = *info; 1040 struct gpt_part_entry *p; 1041 bool ok; 1042 1043 if (err_msg != NULL) 1044 *err_msg = NULL; 1045 1046 if (gpt_get_free_spaces_internal(parts, &space, 1, 1, 1, 1047 info->start, -1) < 1) { 1048 if (err_msg) 1049 *err_msg = msg_string(MSG_No_free_space); 1050 return NO_PART; 1051 } 1052 if (parts->dp.num_part >= parts->max_num_parts) { 1053 if (err_msg) 1054 *err_msg = msg_string(MSG_err_too_many_partitions); 1055 return NO_PART; 1056 } 1057 1058 if (data.size > space.size) 1059 data.size = space.size; 1060 1061 p = calloc(1, sizeof(*p)); 1062 if (p == NULL) { 1063 if (err_msg != NULL) 1064 *err_msg = INTERNAL_ERROR; 1065 return NO_PART; 1066 } 1067 if (!gpt_info_to_part(p, &data, err_msg)) { 1068 free(p); 1069 return NO_PART; 1070 } 1071 p->gp_flags |= GPEF_MODIFIED; 1072 ok = gpt_insert_part_into_list(parts, &parts->partitions, p, err_msg); 1073 if (ok) { 1074 parts->dp.num_part++; 1075 parts->dp.free_space -= p->gp_size; 1076 return parts->dp.num_part-1; 1077 } else { 1078 free(p); 1079 return NO_PART; 1080 } 1081 } 1082 1083 static bool 1084 gpt_delete_partition(struct disk_partitions *arg, part_id id, 1085 const char **err_msg) 1086 { 1087 struct gpt_disk_partitions *parts = (struct gpt_disk_partitions*)arg; 1088 struct gpt_part_entry *p, *last = NULL; 1089 part_id i; 1090 bool res; 1091 1092 if (parts->dp.num_part == 0) 1093 return false; 1094 1095 for (i = 0, p = parts->partitions; 1096 i != id && i < parts->dp.num_part && p != NULL; 1097 i++, p = p->gp_next) 1098 last = p; 1099 1100 if (p == NULL) { 1101 if (err_msg) 1102 *err_msg = INTERNAL_ERROR; 1103 return false; 1104 } 1105 1106 if (last == NULL) 1107 parts->partitions = p->gp_next; 1108 else 1109 last->gp_next = p->gp_next; 1110 1111 res = true; 1112 if (p->gp_flags & GPEF_ON_DISK) { 1113 if (!gpt_insert_part_into_list(parts, &parts->obsolete, 1114 p, err_msg)) 1115 res = false; 1116 } else { 1117 free(p); 1118 } 1119 1120 if (res) { 1121 parts->dp.num_part--; 1122 parts->dp.free_space += p->gp_size; 1123 } 1124 1125 return res; 1126 } 1127 1128 static bool 1129 gpt_delete_all_partitions(struct disk_partitions *arg) 1130 { 1131 struct gpt_disk_partitions *parts = (struct gpt_disk_partitions*)arg; 1132 1133 while (parts->dp.num_part > 0) { 1134 if (!gpt_delete_partition(&parts->dp, 0, NULL)) 1135 return false; 1136 } 1137 1138 return true; 1139 } 1140 1141 static bool 1142 gpt_read_part(const char *disk, daddr_t start, struct gpt_part_entry *p) 1143 { 1144 char *textbuf, *t, *tt; 1145 static const char expected_hdr[] = "Details for index "; 1146 1147 /* run gpt show for this partition */ 1148 if (collect(T_OUTPUT, &textbuf, 1149 "gpt -r show -b %" PRIu64 " %s 2>/dev/null", start, disk) < 1) 1150 return false; 1151 1152 /* 1153 * gpt show should respond with single partition details, but will 1154 * fall back to "show -a" output if something is wrong 1155 */ 1156 t = strtok(textbuf, "\n"); /* first line is special */ 1157 if (strncmp(t, expected_hdr, sizeof(expected_hdr)-1) != 0) { 1158 free(textbuf); 1159 return false; 1160 } 1161 1162 /* parse output into "old" */ 1163 while ((t = strtok(NULL, "\n")) != NULL) { 1164 tt = strsep(&t, " \t"); 1165 if (strlen(tt) == 0) 1166 continue; 1167 gpt_add_info(p, tt, t, true); 1168 } 1169 free(textbuf); 1170 1171 return true; 1172 } 1173 1174 static bool 1175 gpt_apply_attr(const char *disk, const char *cmd, off_t start, uint todo) 1176 { 1177 size_t i; 1178 char attr_str[STRSIZE]; 1179 1180 if (todo == 0) 1181 return true; 1182 1183 strcpy(attr_str, "-a "); 1184 for (i = 0; todo != 0; i++) { 1185 if (!(gpt_avail_attrs[i].flag & todo)) 1186 continue; 1187 todo &= ~gpt_avail_attrs[i].flag; 1188 if (attr_str[0]) 1189 strlcat(attr_str, ",", 1190 sizeof(attr_str)); 1191 strlcat(attr_str, 1192 gpt_avail_attrs[i].name, 1193 sizeof(attr_str)); 1194 } 1195 if (run_program(RUN_SILENT, 1196 "gpt %s %s -b %" PRIu64 " %s", cmd, attr_str, start, disk) != 0) 1197 return false; 1198 return true; 1199 } 1200 1201 /* 1202 * Modify an existing on-disk partition. 1203 * Start and size can not be changed here, caller needs to deal 1204 * with that kind of changes upfront. 1205 */ 1206 static bool 1207 gpt_modify_part(const char *disk, struct gpt_part_entry *p) 1208 { 1209 struct gpt_part_entry old; 1210 uint todo_set, todo_unset; 1211 1212 /* 1213 * Query current on-disk state 1214 */ 1215 memset(&old, 0, sizeof old); 1216 if (!gpt_read_part(disk, p->gp_start, &old)) 1217 return false; 1218 1219 /* Reject unsupported changes */ 1220 if (old.gp_start != p->gp_start || old.gp_size != p->gp_size) 1221 return false; 1222 1223 /* 1224 * GUID should never change, but the internal copy 1225 * may not yet know it. 1226 */ 1227 strcpy(p->gp_id, old.gp_id); 1228 1229 /* Check type */ 1230 if (p->gp_type != old.gp_type) { 1231 if (run_program(RUN_SILENT, 1232 "gpt label -b %" PRIu64 " -T %s %s", 1233 p->gp_start, p->gp_type->tid, disk) != 0) 1234 return false; 1235 } 1236 1237 /* Check label */ 1238 if (strcmp(p->gp_label, old.gp_label) != 0) { 1239 if (run_program(RUN_SILENT, 1240 "gpt label -b %" PRIu64 " -l \'%s\' %s", 1241 p->gp_start, p->gp_label, disk) != 0) 1242 return false; 1243 } 1244 1245 /* Check attributes */ 1246 if (p->gp_attr != old.gp_attr) { 1247 if (p->gp_attr == 0) { 1248 if (run_program(RUN_SILENT, 1249 "gpt set -N -b %" PRIu64 " %s", 1250 p->gp_start, disk) != 0) 1251 return false; 1252 } else { 1253 todo_set = (p->gp_attr ^ old.gp_attr) & p->gp_attr; 1254 todo_unset = (p->gp_attr ^ old.gp_attr) & old.gp_attr; 1255 if (!gpt_apply_attr(disk, "unset", p->gp_start, 1256 todo_unset)) 1257 return false; 1258 if (!gpt_apply_attr(disk, "set", p->gp_start, 1259 todo_set)) 1260 return false; 1261 } 1262 } 1263 1264 return true; 1265 } 1266 1267 /* 1268 * verbatim copy from sys/dev/dkwedge/dkwedge_bsdlabel.c: 1269 * map FS_* to wedge strings 1270 */ 1271 static const char * 1272 bsdlabel_fstype_to_str(uint8_t fstype) 1273 { 1274 const char *str; 1275 1276 /* 1277 * For each type known to FSTYPE_DEFN (from <sys/disklabel.h>), 1278 * a suitable case branch will convert the type number to a string. 1279 */ 1280 switch (fstype) { 1281 #define FSTYPE_TO_STR_CASE(tag, number, name, fsck, mount) \ 1282 case __CONCAT(FS_,tag): str = __CONCAT(DKW_PTYPE_,tag); break; 1283 FSTYPE_DEFN(FSTYPE_TO_STR_CASE) 1284 #undef FSTYPE_TO_STR_CASE 1285 default: str = NULL; break; 1286 } 1287 1288 return (str); 1289 } 1290 1291 static bool 1292 gpt_add_wedge(const char *disk, struct gpt_part_entry *p) 1293 { 1294 struct dkwedge_info dkw; 1295 const char *tname; 1296 char diskpath[MAXPATHLEN]; 1297 int fd; 1298 1299 memset(&dkw, 0, sizeof(dkw)); 1300 tname = bsdlabel_fstype_to_str(p->fs_type); 1301 if (tname) 1302 strlcpy(dkw.dkw_ptype, tname, sizeof(dkw.dkw_ptype)); 1303 1304 strlcpy((char*)&dkw.dkw_wname, p->gp_id, sizeof(dkw.dkw_wname)); 1305 dkw.dkw_offset = p->gp_start; 1306 dkw.dkw_size = p->gp_size; 1307 if (dkw.dkw_wname[0] == 0) { 1308 if (p->gp_label[0] != 0) 1309 strlcpy((char*)&dkw.dkw_wname, 1310 p->gp_label, sizeof(dkw.dkw_wname)); 1311 } 1312 if (dkw.dkw_wname[0] == 0) { 1313 snprintf((char*)dkw.dkw_wname, sizeof dkw.dkw_wname, 1314 "%s_%" PRIi64 "@%" PRIi64, disk, p->gp_size, p->gp_start); 1315 } 1316 1317 fd = opendisk(disk, O_RDWR, diskpath, sizeof(diskpath), 0); 1318 if (fd < 0) 1319 return false; 1320 if (ioctl(fd, DIOCAWEDGE, &dkw) == -1) { 1321 close(fd); 1322 return false; 1323 } 1324 close(fd); 1325 1326 strlcpy(p->gp_dev_name, dkw.dkw_devname, sizeof(p->gp_dev_name)); 1327 p->gp_flags |= GPEF_WEDGE; 1328 return true; 1329 } 1330 1331 static void 1332 escape_spaces(char *dest, const char *src) 1333 { 1334 unsigned char c; 1335 1336 while (*src) { 1337 c = *src++; 1338 if (isspace(c) || c == '\\') 1339 *dest++ = '\\'; 1340 *dest++ = c; 1341 } 1342 *dest = 0; 1343 } 1344 1345 static bool 1346 gpt_get_part_device(const struct disk_partitions *arg, 1347 part_id id, char *devname, size_t max_devname_len, int *part, 1348 enum dev_name_usage usage, bool with_path, bool life) 1349 { 1350 const struct gpt_disk_partitions *parts = 1351 (const struct gpt_disk_partitions*)arg; 1352 struct gpt_part_entry *p = parts->partitions; 1353 char tmpname[GPT_LABEL_LEN*2]; 1354 part_id no; 1355 1356 1357 for (no = 0; p != NULL && no < id; no++) 1358 p = p->gp_next; 1359 1360 if (no != id || p == NULL) 1361 return false; 1362 1363 if (part) 1364 *part = -1; 1365 1366 if (usage == logical_name && p->gp_label[0] == 0 && p->gp_id[0] == 0) 1367 usage = plain_name; 1368 if (usage == plain_name || usage == raw_dev_name) 1369 life = true; 1370 if (!(p->gp_flags & GPEF_WEDGE) && life) 1371 gpt_add_wedge(arg->disk, p); 1372 1373 switch (usage) { 1374 case logical_name: 1375 if (p->gp_label[0] != 0) { 1376 escape_spaces(tmpname, p->gp_label); 1377 snprintf(devname, max_devname_len, 1378 "NAME=%s", tmpname); 1379 } else { 1380 snprintf(devname, max_devname_len, 1381 "NAME=%s", p->gp_id); 1382 } 1383 break; 1384 case plain_name: 1385 assert(p->gp_flags & GPEF_WEDGE); 1386 if (with_path) 1387 snprintf(devname, max_devname_len, _PATH_DEV "%s", 1388 p->gp_dev_name); 1389 else 1390 strlcpy(devname, p->gp_dev_name, max_devname_len); 1391 break; 1392 case raw_dev_name: 1393 assert(p->gp_flags & GPEF_WEDGE); 1394 if (with_path) 1395 snprintf(devname, max_devname_len, _PATH_DEV "r%s", 1396 p->gp_dev_name); 1397 else 1398 snprintf(devname, max_devname_len, "r%s", 1399 p->gp_dev_name); 1400 break; 1401 default: 1402 return false; 1403 } 1404 1405 return true; 1406 } 1407 1408 static bool 1409 gpt_write_to_disk(struct disk_partitions *arg) 1410 { 1411 struct gpt_disk_partitions *parts = (struct gpt_disk_partitions*)arg; 1412 struct gpt_part_entry *p, *n; 1413 char label_arg[sizeof(p->gp_label) + 10]; 1414 char diskpath[MAXPATHLEN]; 1415 int fd, bits = 0; 1416 bool root_is_new = false, efi_is_new = false; 1417 part_id root_id = NO_PART, efi_id = NO_PART, pno; 1418 1419 /* 1420 * Remove all wedges on this disk - they may become invalid and we 1421 * have no easy way to associate them with the partitioning data. 1422 * Instead we will explicitly request creation of wedges on demand 1423 * later. 1424 */ 1425 fd = opendisk(arg->disk, O_RDWR, diskpath, sizeof(diskpath), 0); 1426 if (fd < 0) 1427 return false; 1428 if (ioctl(fd, DIOCRMWEDGES, &bits) == -1) 1429 return false; 1430 close(fd); 1431 1432 /* 1433 * Collect first root and efi partition (if available), clear 1434 * "have wedge" flags. 1435 */ 1436 for (pno = 0, p = parts->partitions; p != NULL; p = p->gp_next, pno++) { 1437 p->gp_flags &= ~GPEF_WEDGE; 1438 if (root_id == NO_PART && p->gp_type != NULL) { 1439 if (p->gp_type->gent.generic_ptype == PT_root && 1440 p->gp_start == pm->ptstart) { 1441 root_id = pno; 1442 root_is_new = !(p->gp_flags & GPEF_ON_DISK); 1443 } else if (efi_id == NO_PART && 1444 p->gp_type->gent.generic_ptype == PT_EFI_SYSTEM) { 1445 efi_id = pno; 1446 efi_is_new = !(p->gp_flags & GPEF_ON_DISK); 1447 } 1448 } 1449 } 1450 1451 /* 1452 * If no GPT on disk yet, create it. 1453 */ 1454 if (!parts->has_gpt) { 1455 char limit[30]; 1456 1457 if (parts->max_num_parts > 0) 1458 sprintf(limit, "-p %zu", parts->max_num_parts); 1459 else 1460 limit[0] = 0; 1461 if (run_program(RUN_SILENT, "gpt create %s %s", 1462 limit, parts->dp.disk)) 1463 return false; 1464 parts->has_gpt = true; 1465 } 1466 1467 /* 1468 * Delete all old partitions 1469 */ 1470 for (p = parts->obsolete; p != NULL; p = n) { 1471 run_program(RUN_SILENT, "gpt -n remove -b %" PRIu64 " %s", 1472 p->gp_start, arg->disk); 1473 n = p->gp_next; 1474 free(p); 1475 } 1476 parts->obsolete = NULL; 1477 1478 /* 1479 * Modify existing but changed partitions 1480 */ 1481 for (p = parts->partitions; p != NULL; p = p->gp_next) { 1482 if (!(p->gp_flags & GPEF_ON_DISK)) 1483 continue; 1484 1485 if (p->gp_flags & GPEF_RESIZED) { 1486 run_program(RUN_SILENT, 1487 "gpt -n resize -b %" PRIu64 " -s %" PRIu64 "s %s", 1488 p->gp_start, p->gp_size, arg->disk); 1489 p->gp_flags &= ~GPEF_RESIZED; 1490 } 1491 1492 if (!(p->gp_flags & GPEF_MODIFIED)) 1493 continue; 1494 1495 if (!gpt_modify_part(parts->dp.disk, p)) 1496 return false; 1497 } 1498 1499 /* 1500 * Add new partitions 1501 */ 1502 for (p = parts->partitions; p != NULL; p = p->gp_next) { 1503 if (p->gp_flags & GPEF_ON_DISK) 1504 continue; 1505 if (!(p->gp_flags & GPEF_MODIFIED)) 1506 continue; 1507 1508 if (p->gp_label[0] == 0) 1509 label_arg[0] = 0; 1510 else 1511 sprintf(label_arg, "-l \'%s\'", p->gp_label); 1512 1513 if (p->gp_type != NULL) 1514 run_program(RUN_SILENT, 1515 "gpt -n add -b %" PRIu64 " -s %" PRIu64 1516 "s -t %s %s %s", 1517 p->gp_start, p->gp_size, p->gp_type->tid, 1518 label_arg, arg->disk); 1519 else 1520 run_program(RUN_SILENT, 1521 "gpt -n add -b %" PRIu64 " -s %" PRIu64 1522 "s %s %s", 1523 p->gp_start, p->gp_size, label_arg, arg->disk); 1524 gpt_apply_attr(arg->disk, "set", p->gp_start, p->gp_attr); 1525 gpt_read_part(arg->disk, p->gp_start, p); 1526 p->gp_flags |= GPEF_ON_DISK; 1527 } 1528 1529 /* 1530 * Additional MD bootloader magic... 1531 */ 1532 if (!md_gpt_post_write(&parts->dp, root_id, root_is_new, efi_id, 1533 efi_is_new)) 1534 return false; 1535 1536 return true; 1537 } 1538 1539 static part_id 1540 gpt_find_by_name(struct disk_partitions *arg, const char *name) 1541 { 1542 struct gpt_disk_partitions *parts = (struct gpt_disk_partitions*)arg; 1543 struct gpt_part_entry *p; 1544 part_id pno; 1545 1546 for (pno = 0, p = parts->partitions; p != NULL; 1547 p = p->gp_next, pno++) { 1548 if (strcmp(p->gp_label, name) == 0) 1549 return pno; 1550 if (strcmp(p->gp_id, name) == 0) 1551 return pno; 1552 } 1553 1554 return NO_PART; 1555 } 1556 1557 bool 1558 gpt_parts_check(void) 1559 { 1560 1561 check_available_binaries(); 1562 1563 return have_gpt && have_dk; 1564 } 1565 1566 static void 1567 gpt_free(struct disk_partitions *arg) 1568 { 1569 struct gpt_disk_partitions *parts = (struct gpt_disk_partitions*)arg; 1570 struct gpt_part_entry *p, *n; 1571 1572 assert(parts != NULL); 1573 for (p = parts->partitions; p != NULL; p = n) { 1574 free(__UNCONST(p->last_mounted)); 1575 n = p->gp_next; 1576 free(p); 1577 } 1578 free(__UNCONST(parts->dp.disk)); 1579 free(parts); 1580 } 1581 1582 static bool 1583 gpt_custom_attribute_writable(const struct disk_partitions *arg, 1584 part_id ptn, size_t attr_no) 1585 { 1586 const struct gpt_disk_partitions *parts = 1587 (const struct gpt_disk_partitions*)arg; 1588 size_t i; 1589 struct gpt_part_entry *p; 1590 1591 if (attr_no >= arg->pscheme->custom_attribute_count) 1592 return false; 1593 1594 const msg label = arg->pscheme->custom_attributes[attr_no].label; 1595 1596 /* we can not edit the uuid attribute */ 1597 if (label == MSG_ptn_uuid) 1598 return false; 1599 1600 /* the label is always editable */ 1601 if (label == MSG_ptn_label) 1602 return true; 1603 1604 /* the GPT type is read only */ 1605 if (label == MSG_ptn_gpt_type) 1606 return false; 1607 1608 /* BOOTME makes no sense on swap partitions */ 1609 for (i = 0, p = parts->partitions; p != NULL; i++, p = p->gp_next) 1610 if (i == ptn) 1611 break; 1612 1613 if (p == NULL) 1614 return false; 1615 1616 if (p->fs_type == FS_SWAP || 1617 (p->gp_type != NULL && p->gp_type->gent.generic_ptype == PT_swap)) 1618 return false; 1619 1620 return true; 1621 } 1622 1623 static const char * 1624 gpt_get_label_str(const struct disk_partitions *arg, part_id ptn) 1625 { 1626 const struct gpt_disk_partitions *parts = 1627 (const struct gpt_disk_partitions*)arg; 1628 size_t i; 1629 struct gpt_part_entry *p; 1630 1631 for (i = 0, p = parts->partitions; p != NULL; i++, p = p->gp_next) 1632 if (i == ptn) 1633 break; 1634 1635 if (p == NULL) 1636 return NULL; 1637 1638 if (p->gp_label[0] != 0) 1639 return p->gp_label; 1640 return p->gp_id; 1641 } 1642 1643 static bool 1644 gpt_format_custom_attribute(const struct disk_partitions *arg, 1645 part_id ptn, size_t attr_no, const struct disk_part_info *info, 1646 char *out, size_t out_space) 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, data; 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 1665 if (info != NULL) { 1666 data = *p; 1667 gpt_info_to_part(&data, info, NULL); 1668 p = &data; 1669 } 1670 1671 if (label == MSG_ptn_label) 1672 strlcpy(out, p->gp_label, out_space); 1673 else if (label == MSG_ptn_uuid) 1674 strlcpy(out, p->gp_id, out_space); 1675 else if (label == MSG_ptn_gpt_type) { 1676 if (p->gp_type != NULL) 1677 strlcpy(out, p->gp_type->gent.description, out_space); 1678 else if (out_space > 1) 1679 out[0] = 0; 1680 } else if (label == MSG_ptn_boot) 1681 strlcpy(out, msg_string(p->gp_attr & GPT_ATTR_BOOT ? 1682 MSG_Yes : MSG_No), out_space); 1683 else 1684 return false; 1685 1686 return true; 1687 } 1688 1689 static bool 1690 gpt_custom_attribute_toggle(struct disk_partitions *arg, 1691 part_id ptn, size_t attr_no) 1692 { 1693 const struct gpt_disk_partitions *parts = 1694 (const struct gpt_disk_partitions*)arg; 1695 size_t i; 1696 struct gpt_part_entry *p; 1697 1698 for (i = 0, p = parts->partitions; p != NULL; i++, p = p->gp_next) 1699 if (i == ptn) 1700 break; 1701 1702 if (p == NULL) 1703 return false; 1704 1705 if (attr_no >= parts->dp.pscheme->custom_attribute_count) 1706 return false; 1707 1708 const msg label = parts->dp.pscheme->custom_attributes[attr_no].label; 1709 if (label != MSG_ptn_boot) 1710 return false; 1711 1712 if (p->gp_attr & GPT_ATTR_BOOT) { 1713 p->gp_attr &= ~GPT_ATTR_BOOT; 1714 } else { 1715 for (i = 0, p = parts->partitions; p != NULL; 1716 i++, p = p->gp_next) 1717 if (i == ptn) 1718 p->gp_attr |= GPT_ATTR_BOOT; 1719 else 1720 p->gp_attr &= ~GPT_ATTR_BOOT; 1721 } 1722 return true; 1723 } 1724 1725 static bool 1726 gpt_custom_attribute_set_str(struct disk_partitions *arg, 1727 part_id ptn, size_t attr_no, const char *new_val) 1728 { 1729 const struct gpt_disk_partitions *parts = 1730 (const struct gpt_disk_partitions*)arg; 1731 size_t i; 1732 struct gpt_part_entry *p; 1733 1734 for (i = 0, p = parts->partitions; p != NULL; i++, p = p->gp_next) 1735 if (i == ptn) 1736 break; 1737 1738 if (p == NULL) 1739 return false; 1740 1741 if (attr_no >= parts->dp.pscheme->custom_attribute_count) 1742 return false; 1743 1744 const msg label = parts->dp.pscheme->custom_attributes[attr_no].label; 1745 1746 if (label != MSG_ptn_label) 1747 return false; 1748 1749 strlcpy(p->gp_label, new_val, sizeof(p->gp_label)); 1750 return true; 1751 } 1752 1753 static bool 1754 gpt_have_boot_support(const char *disk) 1755 { 1756 #ifdef HAVE_GPT_BOOT 1757 return true; 1758 #else 1759 return false; 1760 #endif 1761 } 1762 1763 const struct disk_part_custom_attribute gpt_custom_attrs[] = { 1764 { .label = MSG_ptn_label, .type = pet_str }, 1765 { .label = MSG_ptn_uuid, .type = pet_str }, 1766 { .label = MSG_ptn_gpt_type, .type = pet_str }, 1767 { .label = MSG_ptn_boot, .type = pet_bool }, 1768 }; 1769 1770 const struct disk_partitioning_scheme 1771 gpt_parts = { 1772 .name = MSG_parttype_gpt, 1773 .short_name = MSG_parttype_gpt_short, 1774 .part_flag_desc = MSG_gpt_flag_desc, 1775 .custom_attribute_count = __arraycount(gpt_custom_attrs), 1776 .custom_attributes = gpt_custom_attrs, 1777 .get_part_types_count = gpt_type_count, 1778 .get_part_type = gpt_get_ptype, 1779 .get_generic_part_type = gpt_get_generic_type, 1780 .get_fs_part_type = gpt_get_fs_part_type, 1781 .get_default_fstype = gpt_get_default_fstype, 1782 .create_custom_part_type = gpt_create_custom_part_type, 1783 .create_unknown_part_type = gpt_create_unknown_part_type, 1784 .get_part_alignment = gpt_get_part_alignment, 1785 .read_from_disk = gpt_read_from_disk, 1786 .get_cylinder_size = gpt_cyl_size, 1787 .create_new_for_disk = gpt_create_new, 1788 .have_boot_support = gpt_have_boot_support, 1789 .find_by_name = gpt_find_by_name, 1790 .can_add_partition = gpt_can_add_partition, 1791 .custom_attribute_writable = gpt_custom_attribute_writable, 1792 .format_custom_attribute = gpt_format_custom_attribute, 1793 .custom_attribute_toggle = gpt_custom_attribute_toggle, 1794 .custom_attribute_set_str = gpt_custom_attribute_set_str, 1795 .other_partition_identifier = gpt_get_label_str, 1796 .get_part_device = gpt_get_part_device, 1797 .max_free_space_at = gpt_max_free_space_at, 1798 .get_free_spaces = gpt_get_free_spaces, 1799 .adapt_foreign_part_info = generic_adapt_foreign_part_info, 1800 .get_part_info = gpt_get_part_info, 1801 .get_part_attr_str = gpt_get_part_attr_str, 1802 .set_part_info = gpt_set_part_info, 1803 .add_partition = gpt_add_part, 1804 .delete_all_partitions = gpt_delete_all_partitions, 1805 .delete_partition = gpt_delete_partition, 1806 .write_to_disk = gpt_write_to_disk, 1807 .free = gpt_free, 1808 .cleanup = gpt_cleanup, 1809 }; 1810