gpt.c revision 1.25
1/* $NetBSD: gpt.c,v 1.25 2021/07/17 18:07:22 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 <errno.h> 36#include <err.h> 37#include <paths.h> 38#include <sys/param.h> 39#include <sys/ioctl.h> 40#include <util.h> 41#include <uuid.h> 42 43bool gpt_parts_check(void); /* check for needed binaries */ 44 45 46/*************** GPT ************************************************/ 47/* a GPT based disk_partitions interface */ 48 49#define GUID_STR_LEN 40 50#define GPT_PTYPE_ALLOC 32 /* initial type array allocation, should be > 51 * gpt type -l | wc -l */ 52#define GPT_DEV_LEN 16 /* dkNN */ 53 54#define GPT_PARTS_PER_SEC 4 /* a 512 byte sector holds 4 entries */ 55#define GPT_DEFAULT_MAX_PARTS 128 56 57/* a usable label will be short, so we can get away with an arbitrary limit */ 58#define GPT_LABEL_LEN 96 59 60#define GPT_ATTR_BIOSBOOT 1 61#define GPT_ATTR_BOOTME 2 62#define GPT_ATTR_BOOTONCE 4 63#define GPT_ATTR_BOOTFAILED 8 64#define GPT_ATTR_NOBLOCKIO 16 65#define GPT_ATTR_REQUIRED 32 66 67/* when we don't care for BIOS or UEFI boot, use the combined boot flags */ 68#define GPT_ATTR_BOOT (GPT_ATTR_BIOSBOOT|GPT_ATTR_BOOTME) 69 70struct gpt_attr_desc { 71 const char *name; 72 uint flag; 73}; 74static const struct gpt_attr_desc gpt_avail_attrs[] = { 75 { "biosboot", GPT_ATTR_BIOSBOOT }, 76 { "bootme", GPT_ATTR_BOOTME }, 77 { "bootonce", GPT_ATTR_BOOTONCE }, 78 { "bootfailed", GPT_ATTR_BOOTFAILED }, 79 { "noblockio", GPT_ATTR_NOBLOCKIO }, 80 { "required", GPT_ATTR_REQUIRED }, 81 { NULL, 0 } 82}; 83 84struct gpt_ptype_desc { 85 struct part_type_desc gent; 86 char tid[GUID_STR_LEN]; 87 uint fsflags, default_fs_type; 88}; 89 90static const 91struct { 92 const char *name; 93 uint fstype; 94 enum part_type ptype; 95 uint fsflags; 96} gpt_fs_types[] = { 97 { .name = "ffs", .fstype = FS_BSDFFS, .ptype = PT_root, 98 .fsflags = GLM_LIKELY_FFS }, 99 { .name = "swap", .fstype = FS_SWAP, .ptype = PT_swap }, 100 { .name = "windows", .fstype = FS_MSDOS, .ptype = PT_FAT, 101 .fsflags = GLM_MAYBE_FAT32|GLM_MAYBE_NTFS }, 102 { .name = "windows", .fstype = FS_NTFS, .ptype = PT_FAT, 103 .fsflags = GLM_MAYBE_FAT32|GLM_MAYBE_NTFS }, 104 { .name = "efi", .fstype = FS_MSDOS, .ptype = PT_EFI_SYSTEM, 105 .fsflags = GLM_MAYBE_FAT32 }, 106 { .name = "bios", .fstype = FS_MSDOS, .ptype = PT_FAT, 107 .fsflags = GLM_MAYBE_FAT32 }, 108 { .name = "lfs", .fstype = FS_BSDLFS, .ptype = PT_root }, 109 { .name = "linux-data", .fstype = FS_EX2FS, .ptype = PT_root }, 110 { .name = "apple", .fstype = FS_HFS, .ptype = PT_unknown }, 111 { .name = "ccd", .fstype = FS_CCD, .ptype = PT_root }, 112 { .name = "cgd", .fstype = FS_CGD, .ptype = PT_root }, 113 { .name = "raid", .fstype = FS_RAID, .ptype = PT_root }, 114 { .name = "vmcore", .fstype = FS_VMKCORE, .ptype = PT_unknown }, 115 { .name = "vmfs", .fstype = FS_VMFS, .ptype = PT_unknown }, 116 { .name = "vmresered", .fstype = FS_VMWRESV, .ptype = PT_unknown }, 117 { .name = "zfs", .fstype = FS_ZFS, .ptype = PT_root }, 118}; 119 120static size_t gpt_ptype_cnt = 0, gpt_ptype_alloc = 0; 121static struct gpt_ptype_desc *gpt_ptype_descs = NULL; 122 123/* "well" known types with special handling */ 124static const struct part_type_desc *gpt_native_root; 125 126/* similar to struct gpt_ent, but matching our needs */ 127struct gpt_part_entry { 128 const struct gpt_ptype_desc *gp_type; 129 char gp_id[GUID_STR_LEN]; /* partition guid as string */ 130 daddr_t gp_start, gp_size; 131 uint gp_attr; /* various attribute bits */ 132 char gp_label[GPT_LABEL_LEN]; /* user defined label */ 133 char gp_dev_name[GPT_DEV_LEN]; /* name of wedge */ 134 const char *last_mounted; /* last mounted if known */ 135 uint fs_type, fs_sub_type, /* FS_* and maybe sub type */ 136 fs_opt1, fs_opt2, fs_opt3; /* transient file system options */ 137 uint gp_flags; 138#define GPEF_ON_DISK 1 /* This entry exists on-disk */ 139#define GPEF_MODIFIED 2 /* this entry has been changed */ 140#define GPEF_WEDGE 4 /* wedge for this exists */ 141#define GPEF_RESIZED 8 /* size has changed */ 142#define GPEF_TARGET 16 /* marked install target */ 143 struct gpt_part_entry *gp_next; 144}; 145 146static const struct gpt_ptype_desc *gpt_find_native_type( 147 const struct part_type_desc *gent); 148static const struct gpt_ptype_desc *gpt_find_guid_type(const char*); 149static bool 150gpt_info_to_part(struct gpt_part_entry *p, const struct disk_part_info *info, 151 const char **err_msg); 152 153const struct disk_partitioning_scheme gpt_parts; 154struct gpt_disk_partitions { 155 struct disk_partitions dp; 156 /* 157 * We keep a list of our current valid partitions, pointed 158 * to by "partitions". 159 * dp.num_part is the number of entries in "partitions". 160 * When partitions that have a representation on disk already 161 * are deleted, we move them to the "obsolete" list so we 162 * can issue the proper commands to remove it when writing back. 163 */ 164 struct gpt_part_entry *partitions, /* current partitions */ 165 *obsolete; /* deleted partitions */ 166 size_t max_num_parts; /* how many entries max? */ 167 size_t prologue, epilogue; /* number of sectors res. */ 168 bool has_gpt; /* disk already has a GPT */ 169}; 170 171/* 172 * Init global variables from MD details 173 */ 174static void 175gpt_md_init(bool is_boot_disk, size_t *max_parts, size_t *head, size_t *tail) 176{ 177 size_t num; 178 179 if (is_boot_disk) { 180#ifdef MD_GPT_INITIAL_SIZE 181#if MD_GPT_INITIAL_SIZE < 2*512 182#error impossible small GPT prologue 183#endif 184 num = ((MD_GPT_INITIAL_SIZE-(2*512))/512)*GPT_PARTS_PER_SEC; 185#else 186 num = GPT_DEFAULT_MAX_PARTS; 187#endif 188 } else { 189 num = GPT_DEFAULT_MAX_PARTS; 190 } 191 *max_parts = num; 192 *head = 2 + num/GPT_PARTS_PER_SEC; 193 *tail = 1 + num/GPT_PARTS_PER_SEC; 194} 195 196/* 197 * Parse a part of "gpt show" output into a struct gpt_part_entry. 198 * Output is from "show -a" format if details = false, otherwise 199 * from details for a specific partition (show -i or show -b) 200 */ 201static void 202gpt_add_info(struct gpt_part_entry *part, const char *tag, char *val, 203 bool details) 204{ 205 char *s, *e; 206 207 if (details && strcmp(tag, "Start:") == 0) { 208 part->gp_start = strtouq(val, NULL, 10); 209 } else if (details && strcmp(tag, "Size:") == 0) { 210 part->gp_size = strtouq(val, NULL, 10); 211 } else if (details && strcmp(tag, "Type:") == 0) { 212 s = strchr(val, '('); 213 if (!s) 214 return; 215 e = strchr(s, ')'); 216 if (!e) 217 return; 218 *e = 0; 219 part->gp_type = gpt_find_guid_type(s+1); 220 } else if (strcmp(tag, "TypeID:") == 0) { 221 part->gp_type = gpt_find_guid_type(val); 222 } else if (strcmp(tag, "GUID:") == 0) { 223 strlcpy(part->gp_id, val, sizeof(part->gp_id)); 224 } else if (strcmp(tag, "Label:") == 0) { 225 strlcpy(part->gp_label, val, sizeof(part->gp_label)); 226 } else if (strcmp(tag, "Attributes:") == 0) { 227 char *n; 228 229 while ((n = strsep(&val, ", ")) != NULL) { 230 if (*n == 0) 231 continue; 232 for (const struct gpt_attr_desc *p = gpt_avail_attrs; 233 p->name != NULL; p++) { 234 if (strcmp(p->name, n) == 0) 235 part->gp_attr |= p->flag; 236 } 237 } 238 } 239} 240 241/* 242 * Find the partition matching this wedge info and record that we 243 * have a wedge already. 244 */ 245static void 246update_part_from_wedge_info(struct gpt_disk_partitions *parts, 247 const struct dkwedge_info *dkw) 248{ 249 for (struct gpt_part_entry *p = parts->partitions; p != NULL; 250 p = p->gp_next) { 251 if (p->gp_start != dkw->dkw_offset || 252 (uint64_t)p->gp_size != dkw->dkw_size) 253 continue; 254 p->gp_flags |= GPEF_WEDGE; 255 strlcpy(p->gp_dev_name, dkw->dkw_devname, 256 sizeof p->gp_dev_name); 257 return; 258 } 259} 260 261static struct disk_partitions * 262gpt_read_from_disk(const char *dev, daddr_t start, daddr_t len, size_t bps, 263 const struct disk_partitioning_scheme *scheme) 264{ 265 char diskpath[MAXPATHLEN]; 266 int fd; 267 struct dkwedge_info *dkw; 268 struct dkwedge_list dkwl; 269 size_t bufsize, dk; 270 271 assert(start == 0); 272 assert(have_gpt); 273 274 if (run_program(RUN_SILENT | RUN_ERROR_OK, 275 "gpt -rq header %s", dev) != 0) 276 return NULL; 277 278 /* read the partitions */ 279 int i; 280 unsigned int p_index; 281 daddr_t p_start = 0, p_size = 0, avail_start = 0, avail_size = 0, 282 disk_size = 0; 283 char *textbuf, *t, *tt, p_type[STRSIZE]; 284 static const char regpart_prefix[] = "GPT part - "; 285 struct gpt_disk_partitions *parts; 286 struct gpt_part_entry *last = NULL, *add_to = NULL; 287 const struct gpt_ptype_desc *native_root 288 = gpt_find_native_type(gpt_native_root); 289 bool have_target = false; 290 291 if (collect(T_OUTPUT, &textbuf, "gpt -r show -a %s 2>/dev/null", dev) 292 < 1) 293 return NULL; 294 295 /* parse output and create our list */ 296 parts = calloc(1, sizeof(*parts)); 297 if (parts == NULL) 298 return NULL; 299 300 (void)strtok(textbuf, "\n"); /* ignore first line */ 301 while ((t = strtok(NULL, "\n")) != NULL) { 302 i = 0; p_start = 0; p_size = 0; p_index = 0; 303 p_type[0] = 0; 304 while ((tt = strsep(&t, " \t")) != NULL) { 305 if (strlen(tt) == 0) 306 continue; 307 if (i == 0) { 308 if (add_to != NULL) 309 gpt_add_info(add_to, tt, t, false); 310 p_start = strtouq(tt, NULL, 10); 311 if (p_start == 0 && add_to != NULL) 312 break; 313 else 314 add_to = NULL; 315 } 316 if (i == 1) 317 p_size = strtouq(tt, NULL, 10); 318 if (i == 2) 319 p_index = strtouq(tt, NULL, 10); 320 if (i > 2 || (i == 2 && p_index == 0)) { 321 if (p_type[0]) 322 strlcat(p_type, " ", STRSIZE); 323 strlcat(p_type, tt, STRSIZE); 324 } 325 i++; 326 } 327 328 if (p_start == 0 || p_size == 0) 329 continue; 330 else if (strcmp(p_type, "Pri GPT table") == 0) { 331 avail_start = p_start + p_size; 332 parts->prologue = avail_start; 333 parts->epilogue = p_size + 1; 334 parts->max_num_parts = p_size * GPT_PARTS_PER_SEC; 335 } else if (strcmp(p_type, "Sec GPT table") == 0) 336 avail_size = p_start - avail_start; 337 else if(strcmp(p_type, "Sec GPT header") == 0) 338 disk_size = p_start + p_size; 339 else if (p_index == 0 && strlen(p_type) > 0) 340 /* Utilitary entry (PMBR, etc) */ 341 continue; 342 else if (p_index == 0) { 343 /* Free space */ 344 continue; 345 } else { 346 /* Usual partition */ 347 tt = p_type; 348 if (strncmp(tt, regpart_prefix, 349 strlen(regpart_prefix)) == 0) 350 tt += strlen(regpart_prefix); 351 352 /* Add to our linked list */ 353 struct gpt_part_entry *np = calloc(1, sizeof(*np)); 354 if (np == NULL) 355 break; 356 357 strlcpy(np->gp_label, tt, sizeof(np->gp_label)); 358 np->gp_start = p_start; 359 np->gp_size = p_size; 360 np->gp_flags |= GPEF_ON_DISK; 361 if (!have_target && native_root != NULL && 362 strcmp(np->gp_id, native_root->tid) == 0) { 363 have_target = true; 364 np->gp_flags |= GPEF_TARGET; 365 } 366 367 if (last == NULL) 368 parts->partitions = np; 369 else 370 last->gp_next = np; 371 last = np; 372 add_to = np; 373 parts->dp.num_part++; 374 } 375 } 376 free(textbuf); 377 378 /* If the GPT was not complete (e.g. truncated image), barf */ 379 if (disk_size <= 0) { 380 free(parts); 381 return NULL; 382 } 383 384 parts->dp.pscheme = scheme; 385 parts->dp.disk = strdup(dev); 386 parts->dp.disk_start = start; 387 parts->dp.disk_size = disk_size; 388 parts->dp.free_space = avail_size; 389 parts->dp.bytes_per_sector = bps; 390 parts->has_gpt = true; 391 392 fd = opendisk(parts->dp.disk, O_RDONLY, diskpath, sizeof(diskpath), 0); 393 for (struct gpt_part_entry *p = parts->partitions; p != NULL; 394 p = p->gp_next) { 395#ifdef DEFAULT_UFS2 396 bool fs_is_default = false; 397#endif 398 399 if (p->gp_type != NULL) { 400 401 if (p->gp_type->fsflags != 0) { 402 const char *lm = get_last_mounted(fd, 403 p->gp_start, &p->fs_type, 404 &p->fs_sub_type, p->gp_type->fsflags); 405 if (lm != NULL && *lm != 0) { 406 char *path = strdup(lm); 407 canonicalize_last_mounted(path); 408 p->last_mounted = path; 409 } else { 410 p->fs_type = p->gp_type-> 411 default_fs_type; 412#ifdef DEFAULT_UFS2 413 fs_is_default = true; 414#endif 415 } 416 } else { 417 p->fs_type = p->gp_type->default_fs_type; 418#ifdef DEFAULT_UFS2 419 fs_is_default = true; 420#endif 421 } 422#ifdef DEFAULT_UFS2 423 if (fs_is_default && p->fs_type == FS_BSDFFS) 424 p->fs_sub_type = 2; 425#endif 426 } 427 428 parts->dp.free_space -= p->gp_size; 429 } 430 431 /* 432 * Check if we have any (matching/auto-configured) wedges already 433 */ 434 dkw = NULL; 435 dkwl.dkwl_buf = dkw; 436 dkwl.dkwl_bufsize = 0; 437 if (ioctl(fd, DIOCLWEDGES, &dkwl) == 0) { 438 /* do not even try to deal with any races at this point */ 439 bufsize = dkwl.dkwl_nwedges * sizeof(*dkw); 440 dkw = malloc(bufsize); 441 dkwl.dkwl_buf = dkw; 442 dkwl.dkwl_bufsize = bufsize; 443 if (dkw != NULL && ioctl(fd, DIOCLWEDGES, &dkwl) == 0) { 444 for (dk = 0; dk < dkwl.dkwl_ncopied; dk++) 445 update_part_from_wedge_info(parts, &dkw[dk]); 446 } 447 free(dkw); 448 } 449 450 close(fd); 451 452 return &parts->dp; 453} 454 455static size_t 456gpt_cyl_size(const struct disk_partitions *arg) 457{ 458 return MEG / 512; 459} 460 461static struct disk_partitions * 462gpt_create_new(const char *disk, daddr_t start, daddr_t len, 463 bool is_boot_drive, struct disk_partitions *parent) 464{ 465 struct gpt_disk_partitions *parts; 466 struct disk_geom geo; 467 468 if (start != 0) { 469 assert(0); 470 return NULL; 471 } 472 473 if (!get_disk_geom(disk, &geo)) 474 return NULL; 475 476 parts = calloc(1, sizeof(*parts)); 477 if (!parts) 478 return NULL; 479 480 parts->dp.pscheme = &gpt_parts; 481 parts->dp.disk = strdup(disk); 482 483 gpt_md_init(is_boot_drive, &parts->max_num_parts, &parts->prologue, 484 &parts->epilogue); 485 486 parts->dp.disk_start = start; 487 parts->dp.disk_size = len; 488 parts->dp.bytes_per_sector = geo.dg_secsize; 489 parts->dp.free_space = len - start - parts->prologue - parts->epilogue; 490 parts->has_gpt = false; 491 492 return &parts->dp; 493} 494 495static bool 496gpt_get_part_info(const struct disk_partitions *arg, part_id id, 497 struct disk_part_info *info) 498{ 499 static const struct part_type_desc gpt_unknown_type = 500 { .generic_ptype = PT_undef, 501 .short_desc = "<unknown>" }; 502 const struct gpt_disk_partitions *parts = 503 (const struct gpt_disk_partitions*)arg; 504 const struct gpt_part_entry *p = parts->partitions; 505 part_id no; 506 507 for (no = 0; p != NULL && no < id; no++) 508 p = p->gp_next; 509 510 if (no != id || p == NULL) 511 return false; 512 513 memset(info, 0, sizeof(*info)); 514 info->start = p->gp_start; 515 info->size = p->gp_size; 516 if (p->gp_type) 517 info->nat_type = &p->gp_type->gent; 518 else 519 info->nat_type = &gpt_unknown_type; 520 info->last_mounted = p->last_mounted; 521 info->fs_type = p->fs_type; 522 info->fs_sub_type = p->fs_sub_type; 523 info->fs_opt1 = p->fs_opt1; 524 info->fs_opt2 = p->fs_opt2; 525 info->fs_opt3 = p->fs_opt3; 526 if (p->gp_flags & GPEF_TARGET) 527 info->flags |= PTI_INSTALL_TARGET; 528 529 return true; 530} 531 532static bool 533gpt_get_part_attr_str(const struct disk_partitions *arg, part_id id, 534 char *str, size_t avail_space) 535{ 536 const struct gpt_disk_partitions *parts = 537 (const struct gpt_disk_partitions*)arg; 538 const struct gpt_part_entry *p = parts->partitions; 539 part_id no; 540 static const char *flags = NULL; 541 542 for (no = 0; p != NULL && no < id; no++) 543 p = p->gp_next; 544 545 if (no != id || p == NULL) 546 return false; 547 548 if (flags == NULL) 549 flags = msg_string(MSG_gpt_flags); 550 551 if (avail_space < 2) 552 return false; 553 554 if (p->gp_attr & GPT_ATTR_BOOT) 555 *str++ = flags[0]; 556 *str = 0; 557 558 return true; 559} 560 561/* 562 * Find insert position and check for duplicates. 563 * If all goes well, insert the new "entry" in the "list". 564 * If there are collisions, report "no free space". 565 * We keep all lists sorted by start sector number, 566 */ 567static bool 568gpt_insert_part_into_list(struct gpt_disk_partitions *parts, 569 struct gpt_part_entry **list, 570 struct gpt_part_entry *entry, const char **err_msg) 571{ 572 struct gpt_part_entry *p, *last; 573 574 /* find the first entry past the new one (if any) */ 575 for (last = NULL, p = *list; p != NULL; last = p, p = p->gp_next) { 576 if (p->gp_start > entry->gp_start) 577 break; 578 } 579 580 /* check if last partition overlaps with new one */ 581 if (last) { 582 if (last->gp_start + last->gp_size > entry->gp_start) { 583 if (err_msg) 584 *err_msg = msg_string(MSG_No_free_space); 585 return false; 586 } 587 } 588 589 if (p == NULL) { 590 entry->gp_next = NULL; 591 if (last != NULL) { 592 last->gp_next = entry; 593 } 594 } else { 595 /* check if new entry overlaps with next */ 596 if (entry->gp_start + entry->gp_size > p->gp_start) { 597 if (err_msg) 598 *err_msg = msg_string(MSG_No_free_space); 599 return false; 600 } 601 602 entry->gp_next = p; 603 if (last != NULL) 604 last->gp_next = entry; 605 else 606 *list = entry; 607 } 608 if (*list == NULL) 609 *list = entry; 610 611 return true; 612} 613 614static bool 615gpt_set_part_info(struct disk_partitions *arg, part_id id, 616 const struct disk_part_info *info, const char **err_msg) 617{ 618 struct gpt_disk_partitions *parts = 619 (struct gpt_disk_partitions*)arg; 620 struct gpt_part_entry *p = parts->partitions, *n; 621 part_id no; 622 daddr_t lendiff; 623 bool was_target; 624 625 for (no = 0; p != NULL && no < id; no++) 626 p = p->gp_next; 627 628 if (no != id || p == NULL) 629 return false; 630 631 /* update target mark - we can only have one */ 632 was_target = (p->gp_flags & GPEF_TARGET) != 0; 633 if (info->flags & PTI_INSTALL_TARGET) 634 p->gp_flags |= GPEF_TARGET; 635 else 636 p->gp_flags &= ~GPEF_TARGET; 637 if (was_target) 638 for (n = parts->partitions; n != NULL; n = n->gp_next) 639 if (n != p) 640 n->gp_flags &= ~GPEF_TARGET; 641 642 if ((p->gp_flags & GPEF_ON_DISK)) { 643 if (info->start != p->gp_start) { 644 /* partition moved, we need to delete and re-add */ 645 n = calloc(1, sizeof(*n)); 646 if (n == NULL) { 647 if (err_msg) 648 *err_msg = err_outofmem; 649 return false; 650 } 651 *n = *p; 652 p->gp_flags &= ~GPEF_ON_DISK; 653 if (!gpt_insert_part_into_list(parts, &parts->obsolete, 654 n, err_msg)) 655 return false; 656 } else if (info->size != p->gp_size) { 657 p->gp_flags |= GPEF_RESIZED; 658 } 659 } 660 661 p->gp_flags |= GPEF_MODIFIED; 662 663 lendiff = info->size - p->gp_size; 664 parts->dp.free_space -= lendiff; 665 return gpt_info_to_part(p, info, err_msg); 666} 667 668static size_t 669gpt_get_free_spaces_internal(const struct gpt_disk_partitions *parts, 670 struct disk_part_free_space *result, size_t max_num_result, 671 daddr_t min_space_size, daddr_t align, daddr_t start, daddr_t ignore) 672{ 673 size_t cnt = 0; 674 daddr_t s, e, from, size, end_of_disk; 675 struct gpt_part_entry *p; 676 677 if (align > 1) 678 start = max(roundup(start, align), align); 679 if (start < 0 || start < (daddr_t)parts->prologue) 680 start = parts->prologue; 681 if (parts->dp.disk_start != 0 && parts->dp.disk_start > start) 682 start = parts->dp.disk_start; 683 if (min_space_size < 1) 684 min_space_size = 1; 685 end_of_disk = parts->dp.disk_start + parts->dp.disk_size 686 - parts->epilogue; 687 from = start; 688 while (from < end_of_disk && cnt < max_num_result) { 689again: 690 size = parts->dp.disk_start + parts->dp.disk_size - from; 691 start = from; 692 if (start + size > end_of_disk) 693 size = end_of_disk - start; 694 for (p = parts->partitions; p != NULL; p = p->gp_next) { 695 s = p->gp_start; 696 e = p->gp_size + s; 697 if (s == ignore) 698 continue; 699 if (e < from) 700 continue; 701 if (s <= from && e > from) { 702 if (e - 1 >= end_of_disk) 703 return cnt; 704 from = e + 1; 705 if (align > 1) { 706 from = max(roundup(from, align), align); 707 if (from >= end_of_disk) { 708 size = 0; 709 break; 710 } 711 } 712 goto again; 713 } 714 if (s > from && s - from < size) { 715 size = s - from; 716 } 717 } 718 if (size >= min_space_size) { 719 result->start = start; 720 result->size = size; 721 result++; 722 cnt++; 723 } 724 from += size + 1; 725 if (align > 1) 726 from = max(roundup(from, align), align); 727 } 728 729 return cnt; 730} 731 732static daddr_t 733gpt_max_free_space_at(const struct disk_partitions *arg, daddr_t start) 734{ 735 const struct gpt_disk_partitions *parts = 736 (const struct gpt_disk_partitions*)arg; 737 struct disk_part_free_space space; 738 739 if (gpt_get_free_spaces_internal(parts, &space, 1, 1, 0, 740 start, start) == 1) 741 return space.size; 742 743 return 0; 744} 745 746static size_t 747gpt_get_free_spaces(const struct disk_partitions *arg, 748 struct disk_part_free_space *result, size_t max_num_result, 749 daddr_t min_space_size, daddr_t align, daddr_t start, 750 daddr_t ignore) 751{ 752 const struct gpt_disk_partitions *parts = 753 (const struct gpt_disk_partitions*)arg; 754 755 return gpt_get_free_spaces_internal(parts, result, 756 max_num_result, min_space_size, align, start, ignore); 757} 758 759static void 760gpt_match_ptype(const char *name, struct gpt_ptype_desc *t) 761{ 762 size_t i; 763 764 for (i = 0; i < __arraycount(gpt_fs_types); i++) { 765 if (strcmp(name, gpt_fs_types[i].name) == 0) { 766 t->gent.generic_ptype = gpt_fs_types[i].ptype; 767 t->fsflags = gpt_fs_types[i].fsflags; 768 t->default_fs_type = gpt_fs_types[i].fstype; 769 770 /* recongnize special entries */ 771 if (gpt_native_root == NULL && i == 0) 772 gpt_native_root = &t->gent; 773 774 return; 775 } 776 } 777 778 t->gent.generic_ptype = PT_unknown; 779 t->fsflags = 0; 780 t->default_fs_type = FS_BSDFFS; 781} 782 783static void 784gpt_internal_add_ptype(const char *uid, const char *name, const char *desc) 785{ 786 if (gpt_ptype_cnt >= gpt_ptype_alloc) { 787 gpt_ptype_alloc = gpt_ptype_alloc ? 2*gpt_ptype_alloc 788 : GPT_PTYPE_ALLOC; 789 struct gpt_ptype_desc *nptypes = realloc(gpt_ptype_descs, 790 gpt_ptype_alloc*sizeof(*gpt_ptype_descs)); 791 if (nptypes == 0) 792 errx(EXIT_FAILURE, "out of memory"); 793 gpt_ptype_descs = nptypes; 794 } 795 796 strlcpy(gpt_ptype_descs[gpt_ptype_cnt].tid, uid, 797 sizeof(gpt_ptype_descs[gpt_ptype_cnt].tid)); 798 gpt_ptype_descs[gpt_ptype_cnt].gent.short_desc = strdup(name); 799 gpt_ptype_descs[gpt_ptype_cnt].gent.description = strdup(desc); 800 gpt_match_ptype(name, &gpt_ptype_descs[gpt_ptype_cnt]); 801 gpt_ptype_cnt++; 802} 803 804static void 805gpt_init_ptypes(void) 806{ 807 if (gpt_ptype_cnt == 0) 808 gpt_uuid_query(gpt_internal_add_ptype); 809} 810 811static void 812gpt_cleanup(void) 813{ 814 /* free all of gpt_ptype_descs */ 815 for (size_t i = 0; i < gpt_ptype_cnt; i++) { 816 free(__UNCONST(gpt_ptype_descs[i].gent.short_desc)); 817 free(__UNCONST(gpt_ptype_descs[i].gent.description)); 818 } 819 free(gpt_ptype_descs); 820 gpt_ptype_descs = NULL; 821 gpt_ptype_cnt = gpt_ptype_alloc = 0; 822} 823 824static size_t 825gpt_type_count(void) 826{ 827 if (gpt_ptype_cnt == 0) 828 gpt_init_ptypes(); 829 830 return gpt_ptype_cnt; 831} 832 833static const struct part_type_desc * 834gpt_get_ptype(size_t ndx) 835{ 836 if (gpt_ptype_cnt == 0) 837 gpt_init_ptypes(); 838 839 if (ndx >= gpt_ptype_cnt) 840 return NULL; 841 842 return &gpt_ptype_descs[ndx].gent; 843} 844 845static const struct part_type_desc * 846gpt_get_generic_type(enum part_type gent) 847{ 848 if (gpt_ptype_cnt == 0) 849 gpt_init_ptypes(); 850 851 if (gent == PT_root) 852 return gpt_native_root; 853 if (gent == PT_unknown) 854 return NULL; 855 856 for (size_t i = 0; i < gpt_ptype_cnt; i++) 857 if (gpt_ptype_descs[i].gent.generic_ptype == gent) 858 return &gpt_ptype_descs[i].gent; 859 860 return NULL; 861} 862 863static const struct gpt_ptype_desc * 864gpt_find_native_type(const struct part_type_desc *gent) 865{ 866 if (gpt_ptype_cnt == 0) 867 gpt_init_ptypes(); 868 869 if (gent == NULL) 870 return NULL; 871 872 for (size_t i = 0; i < gpt_ptype_cnt; i++) 873 if (gent == &gpt_ptype_descs[i].gent) 874 return &gpt_ptype_descs[i]; 875 876 gent = gpt_get_generic_type(gent->generic_ptype); 877 if (gent == NULL) 878 return NULL; 879 880 /* this can not recurse deeper than once, we would not have found a 881 * generic type a few lines above if it would. */ 882 return gpt_find_native_type(gent); 883} 884 885static const struct gpt_ptype_desc * 886gpt_find_guid_type(const char *uid) 887{ 888 if (gpt_ptype_cnt == 0) 889 gpt_init_ptypes(); 890 891 if (uid == NULL || uid[0] == 0) 892 return NULL; 893 894 for (size_t i = 0; i < gpt_ptype_cnt; i++) 895 if (strcmp(gpt_ptype_descs[i].tid, uid) == 0) 896 return &gpt_ptype_descs[i]; 897 898 return NULL; 899} 900 901static const struct part_type_desc * 902gpt_find_type(const char *desc) 903{ 904 if (gpt_ptype_cnt == 0) 905 gpt_init_ptypes(); 906 907 if (desc == NULL || desc[0] == 0) 908 return NULL; 909 910 for (size_t i = 0; i < gpt_ptype_cnt; i++) 911 if (strcmp(gpt_ptype_descs[i].gent.short_desc, desc) == 0) 912 return &gpt_ptype_descs[i].gent; 913 914 return NULL; 915} 916 917static const struct part_type_desc * 918gpt_get_fs_part_type(enum part_type pt, unsigned fstype, unsigned fs_sub_type) 919{ 920 size_t i; 921 922 /* Try with complete match (including part_type) first */ 923 for (i = 0; i < __arraycount(gpt_fs_types); i++) 924 if (fstype == gpt_fs_types[i].fstype && 925 pt == gpt_fs_types[i].ptype) 926 return gpt_find_type(gpt_fs_types[i].name); 927 928 /* If that did not work, ignore part_type */ 929 for (i = 0; i < __arraycount(gpt_fs_types); i++) 930 if (fstype == gpt_fs_types[i].fstype) 931 return gpt_find_type(gpt_fs_types[i].name); 932 933 return NULL; 934} 935 936static bool 937gpt_get_default_fstype(const struct part_type_desc *nat_type, 938 unsigned *fstype, unsigned *fs_sub_type) 939{ 940 const struct gpt_ptype_desc *gtype; 941 942 gtype = gpt_find_native_type(nat_type); 943 if (gtype == NULL) 944 return false; 945 946 *fstype = gtype->default_fs_type; 947#ifdef DEFAULT_UFS2 948 if (gtype->default_fs_type == FS_BSDFFS) 949 *fs_sub_type = 2; 950 else 951#endif 952 *fs_sub_type = 0; 953 return true; 954} 955 956static const struct part_type_desc * 957gpt_get_uuid_part_type(const uuid_t *id) 958{ 959 char str[GUID_STR_LEN], desc[GUID_STR_LEN + MENUSTRSIZE]; 960 const struct gpt_ptype_desc *t; 961 char *guid = NULL; 962 uint32_t err; 963 964 uuid_to_string(id, &guid, &err); 965 strlcpy(str, err == uuid_s_ok ? guid : "-", sizeof str); 966 free(guid); 967 968 t = gpt_find_guid_type(str); 969 if (t == NULL) { 970 snprintf(desc, sizeof desc, "%s (%s)", 971 msg_string(MSG_custom_type), str); 972 gpt_internal_add_ptype(str, str, desc); 973 t = gpt_find_guid_type(str); 974 assert(t != NULL); 975 } 976 return &t->gent; 977} 978 979static const struct part_type_desc * 980gpt_create_custom_part_type(const char *custom, const char **err_msg) 981{ 982 uuid_t id; 983 uint32_t err; 984 985 uuid_from_string(custom, &id, &err); 986 if (err_msg != NULL && 987 (err == uuid_s_invalid_string_uuid || err == uuid_s_bad_version)) { 988 *err_msg = MSG_invalid_guid; 989 return NULL; 990 } 991 if (err != uuid_s_ok) 992 return NULL; 993 994 return gpt_get_uuid_part_type(&id); 995} 996 997static const struct part_type_desc * 998gpt_create_unknown_part_type(void) 999{ 1000 uuid_t id; 1001 uint32_t err; 1002 1003 uuid_create(&id, &err); 1004 if (err != uuid_s_ok) 1005 return NULL; 1006 1007 return gpt_get_uuid_part_type(&id); 1008} 1009 1010static daddr_t 1011gpt_get_part_alignment(const struct disk_partitions *parts) 1012{ 1013 1014 assert(parts->disk_size > 0); 1015 if (parts->disk_size < 0) 1016 return 1; 1017 1018 /* Use 1MB offset/alignemnt for large (>128GB) disks */ 1019 if (parts->disk_size > HUGE_DISK_SIZE) 1020 return 2048; 1021 else if (parts->disk_size > TINY_DISK_SIZE) 1022 return 64; 1023 else 1024 return 4; 1025} 1026 1027static bool 1028gpt_can_add_partition(const struct disk_partitions *arg) 1029{ 1030 const struct gpt_disk_partitions *parts = 1031 (const struct gpt_disk_partitions*)arg; 1032 struct disk_part_free_space space; 1033 daddr_t align; 1034 1035 if (parts->dp.num_part >= parts->max_num_parts) 1036 return false; 1037 1038 align = gpt_get_part_alignment(arg); 1039 if (parts->dp.free_space <= align) 1040 return false; 1041 1042 if (gpt_get_free_spaces_internal(parts, &space, 1, align, align, 1043 0, -1) < 1) 1044 return false; 1045 1046 return true; 1047} 1048 1049static bool 1050gpt_info_to_part(struct gpt_part_entry *p, const struct disk_part_info *info, 1051 const char **err_msg) 1052{ 1053 p->gp_type = gpt_find_native_type(info->nat_type); 1054 p->gp_start = info->start; 1055 p->gp_size = info->size; 1056 if (info->last_mounted != NULL && info->last_mounted != 1057 p->last_mounted) { 1058 free(__UNCONST(p->last_mounted)); 1059 p->last_mounted = strdup(info->last_mounted); 1060 } 1061 p->fs_type = info->fs_type; 1062 p->fs_sub_type = info->fs_sub_type; 1063 p->fs_opt1 = info->fs_opt1; 1064 p->fs_opt2 = info->fs_opt2; 1065 p->fs_opt3 = info->fs_opt3; 1066 1067 return true; 1068} 1069 1070static part_id 1071gpt_add_part(struct disk_partitions *arg, 1072 const struct disk_part_info *info, const char **err_msg) 1073{ 1074 struct gpt_disk_partitions *parts = 1075 (struct gpt_disk_partitions*)arg; 1076 struct disk_part_free_space space; 1077 struct disk_part_info data = *info; 1078 struct gpt_part_entry *p; 1079 bool ok; 1080 1081 if (err_msg != NULL) 1082 *err_msg = NULL; 1083 1084 if (gpt_get_free_spaces_internal(parts, &space, 1, 1, 1, 1085 info->start, -1) < 1) { 1086 if (err_msg) 1087 *err_msg = msg_string(MSG_No_free_space); 1088 return NO_PART; 1089 } 1090 if (parts->dp.num_part >= parts->max_num_parts) { 1091 if (err_msg) 1092 *err_msg = msg_string(MSG_err_too_many_partitions); 1093 return NO_PART; 1094 } 1095 1096 if (data.size > space.size) 1097 data.size = space.size; 1098 1099 p = calloc(1, sizeof(*p)); 1100 if (p == NULL) { 1101 if (err_msg != NULL) 1102 *err_msg = INTERNAL_ERROR; 1103 return NO_PART; 1104 } 1105 if (!gpt_info_to_part(p, &data, err_msg)) { 1106 free(p); 1107 return NO_PART; 1108 } 1109 p->gp_flags |= GPEF_MODIFIED; 1110 ok = gpt_insert_part_into_list(parts, &parts->partitions, p, err_msg); 1111 if (ok) { 1112 parts->dp.num_part++; 1113 parts->dp.free_space -= p->gp_size; 1114 return parts->dp.num_part-1; 1115 } else { 1116 free(p); 1117 return NO_PART; 1118 } 1119} 1120 1121static bool 1122gpt_delete_partition(struct disk_partitions *arg, part_id id, 1123 const char **err_msg) 1124{ 1125 struct gpt_disk_partitions *parts = (struct gpt_disk_partitions*)arg; 1126 struct gpt_part_entry *p, *last = NULL; 1127 part_id i; 1128 bool res; 1129 1130 if (parts->dp.num_part == 0) 1131 return false; 1132 1133 for (i = 0, p = parts->partitions; 1134 i != id && i < parts->dp.num_part && p != NULL; 1135 i++, p = p->gp_next) 1136 last = p; 1137 1138 if (p == NULL) { 1139 if (err_msg) 1140 *err_msg = INTERNAL_ERROR; 1141 return false; 1142 } 1143 1144 if (last == NULL) 1145 parts->partitions = p->gp_next; 1146 else 1147 last->gp_next = p->gp_next; 1148 1149 res = true; 1150 if (p->gp_flags & GPEF_ON_DISK) { 1151 if (!gpt_insert_part_into_list(parts, &parts->obsolete, 1152 p, err_msg)) 1153 res = false; 1154 } else { 1155 free(p); 1156 } 1157 1158 if (res) { 1159 parts->dp.num_part--; 1160 parts->dp.free_space += p->gp_size; 1161 } 1162 1163 return res; 1164} 1165 1166static bool 1167gpt_delete_all_partitions(struct disk_partitions *arg) 1168{ 1169 struct gpt_disk_partitions *parts = (struct gpt_disk_partitions*)arg; 1170 1171 while (parts->dp.num_part > 0) { 1172 if (!gpt_delete_partition(&parts->dp, 0, NULL)) 1173 return false; 1174 } 1175 1176 return true; 1177} 1178 1179static bool 1180gpt_read_part(const char *disk, daddr_t start, struct gpt_part_entry *p) 1181{ 1182 char *textbuf, *t, *tt; 1183 static const char expected_hdr[] = "Details for index "; 1184 1185 /* run gpt show for this partition */ 1186 if (collect(T_OUTPUT, &textbuf, 1187 "gpt -r show -b %" PRIu64 " %s 2>/dev/null", start, disk) < 1) 1188 return false; 1189 1190 /* 1191 * gpt show should respond with single partition details, but will 1192 * fall back to "show -a" output if something is wrong 1193 */ 1194 t = strtok(textbuf, "\n"); /* first line is special */ 1195 if (strncmp(t, expected_hdr, sizeof(expected_hdr)-1) != 0) { 1196 free(textbuf); 1197 return false; 1198 } 1199 1200 /* parse output into "old" */ 1201 while ((t = strtok(NULL, "\n")) != NULL) { 1202 tt = strsep(&t, " \t"); 1203 if (strlen(tt) == 0) 1204 continue; 1205 gpt_add_info(p, tt, t, true); 1206 } 1207 free(textbuf); 1208 1209 return true; 1210} 1211 1212static bool 1213gpt_apply_attr(const char *disk, const char *cmd, off_t start, uint todo) 1214{ 1215 size_t i; 1216 char attr_str[STRSIZE]; 1217 1218 if (todo == 0) 1219 return true; 1220 1221 strcpy(attr_str, "-a "); 1222 for (i = 0; todo != 0; i++) { 1223 if (!(gpt_avail_attrs[i].flag & todo)) 1224 continue; 1225 todo &= ~gpt_avail_attrs[i].flag; 1226 if (attr_str[0]) 1227 strlcat(attr_str, ",", 1228 sizeof(attr_str)); 1229 strlcat(attr_str, 1230 gpt_avail_attrs[i].name, 1231 sizeof(attr_str)); 1232 } 1233 if (run_program(RUN_SILENT, 1234 "gpt %s %s -b %" PRIu64 " %s", cmd, attr_str, start, disk) != 0) 1235 return false; 1236 return true; 1237} 1238 1239/* 1240 * Modify an existing on-disk partition. 1241 * Start and size can not be changed here, caller needs to deal 1242 * with that kind of changes upfront. 1243 */ 1244static bool 1245gpt_modify_part(const char *disk, struct gpt_part_entry *p) 1246{ 1247 struct gpt_part_entry old; 1248 uint todo_set, todo_unset; 1249 1250 /* 1251 * Query current on-disk state 1252 */ 1253 memset(&old, 0, sizeof old); 1254 if (!gpt_read_part(disk, p->gp_start, &old)) 1255 return false; 1256 1257 /* Reject unsupported changes */ 1258 if (old.gp_start != p->gp_start || old.gp_size != p->gp_size) 1259 return false; 1260 1261 /* 1262 * GUID should never change, but the internal copy 1263 * may not yet know it. 1264 */ 1265 strcpy(p->gp_id, old.gp_id); 1266 1267 /* Check type */ 1268 if (p->gp_type != old.gp_type) { 1269 if (run_program(RUN_SILENT, 1270 "gpt type -b %" PRIu64 " -T %s %s", 1271 p->gp_start, p->gp_type->tid, disk) != 0) 1272 return false; 1273 } 1274 1275 /* Check label */ 1276 if (strcmp(p->gp_label, old.gp_label) != 0) { 1277 if (run_program(RUN_SILENT, 1278 "gpt label -b %" PRIu64 " -l \'%s\' %s", 1279 p->gp_start, p->gp_label, disk) != 0) 1280 return false; 1281 } 1282 1283 /* Check attributes */ 1284 if (p->gp_attr != old.gp_attr) { 1285 if (p->gp_attr == 0) { 1286 if (run_program(RUN_SILENT, 1287 "gpt set -N -b %" PRIu64 " %s", 1288 p->gp_start, disk) != 0) 1289 return false; 1290 } else { 1291 todo_set = (p->gp_attr ^ old.gp_attr) & p->gp_attr; 1292 todo_unset = (p->gp_attr ^ old.gp_attr) & old.gp_attr; 1293 if (!gpt_apply_attr(disk, "unset", p->gp_start, 1294 todo_unset)) 1295 return false; 1296 if (!gpt_apply_attr(disk, "set", p->gp_start, 1297 todo_set)) 1298 return false; 1299 } 1300 } 1301 1302 return true; 1303} 1304 1305/* 1306 * verbatim copy from sys/dev/dkwedge/dkwedge_bsdlabel.c: 1307 * map FS_* to wedge strings 1308 */ 1309static const char * 1310bsdlabel_fstype_to_str(uint8_t fstype) 1311{ 1312 const char *str; 1313 1314 /* 1315 * For each type known to FSTYPE_DEFN (from <sys/disklabel.h>), 1316 * a suitable case branch will convert the type number to a string. 1317 */ 1318 switch (fstype) { 1319#define FSTYPE_TO_STR_CASE(tag, number, name, fsck, mount) \ 1320 case __CONCAT(FS_,tag): str = __CONCAT(DKW_PTYPE_,tag); break; 1321 FSTYPE_DEFN(FSTYPE_TO_STR_CASE) 1322#undef FSTYPE_TO_STR_CASE 1323 default: str = NULL; break; 1324 } 1325 1326 return (str); 1327} 1328 1329/* 1330 * diskfd is an open file descriptor for a disk we had trouble with 1331 * creating some new wedges. 1332 * Go through all wedges actually on that disk, check if we have a 1333 * record for them and remove all others. 1334 * This should sync our internal model of partitions with the real state. 1335 */ 1336static void 1337gpt_sanitize(int diskfd, const struct gpt_disk_partitions *parts, 1338 struct gpt_part_entry *ignore) 1339{ 1340 struct dkwedge_info *dkw, delw; 1341 struct dkwedge_list dkwl; 1342 size_t bufsize; 1343 u_int i; 1344 1345 dkw = NULL; 1346 dkwl.dkwl_buf = dkw; 1347 dkwl.dkwl_bufsize = 0; 1348 1349 /* get a list of all wedges */ 1350 for (;;) { 1351 if (ioctl(diskfd, DIOCLWEDGES, &dkwl) == -1) 1352 return; 1353 if (dkwl.dkwl_nwedges == dkwl.dkwl_ncopied) 1354 break; 1355 bufsize = dkwl.dkwl_nwedges * sizeof(*dkw); 1356 if (dkwl.dkwl_bufsize < bufsize) { 1357 dkw = realloc(dkwl.dkwl_buf, bufsize); 1358 if (dkw == NULL) 1359 return; 1360 dkwl.dkwl_buf = dkw; 1361 dkwl.dkwl_bufsize = bufsize; 1362 } 1363 } 1364 1365 /* try to remove all the ones we do not know about */ 1366 for (i = 0; i < dkwl.dkwl_nwedges; i++) { 1367 bool found = false; 1368 const char *devname = dkw[i].dkw_devname; 1369 1370 for (struct gpt_part_entry *pe = parts->partitions; 1371 pe != NULL; pe = pe->gp_next) { 1372 if (pe == ignore) 1373 continue; 1374 if ((pe->gp_flags & GPEF_WEDGE) && 1375 strcmp(pe->gp_dev_name, devname) == 0) { 1376 found = true; 1377 break; 1378 } 1379 } 1380 if (found) 1381 continue; 1382 memset(&delw, 0, sizeof(delw)); 1383 strncpy(delw.dkw_devname, devname, sizeof(delw.dkw_devname)); 1384 (void)ioctl(diskfd, DIOCDWEDGE, &delw); 1385 } 1386 1387 /* cleanup */ 1388 free(dkw); 1389} 1390 1391static bool 1392gpt_add_wedge(const char *disk, struct gpt_part_entry *p, 1393 const struct gpt_disk_partitions *parts) 1394{ 1395 struct dkwedge_info dkw; 1396 const char *tname; 1397 char diskpath[MAXPATHLEN]; 1398 int fd; 1399 1400 memset(&dkw, 0, sizeof(dkw)); 1401 tname = bsdlabel_fstype_to_str(p->fs_type); 1402 if (tname) 1403 strlcpy(dkw.dkw_ptype, tname, sizeof(dkw.dkw_ptype)); 1404 1405 strlcpy((char*)&dkw.dkw_wname, p->gp_id, sizeof(dkw.dkw_wname)); 1406 dkw.dkw_offset = p->gp_start; 1407 dkw.dkw_size = p->gp_size; 1408 if (dkw.dkw_wname[0] == 0) { 1409 if (p->gp_label[0] != 0) 1410 strlcpy((char*)&dkw.dkw_wname, 1411 p->gp_label, sizeof(dkw.dkw_wname)); 1412 } 1413 if (dkw.dkw_wname[0] == 0) { 1414 snprintf((char*)dkw.dkw_wname, sizeof dkw.dkw_wname, 1415 "%s_%" PRIi64 "@%" PRIi64, disk, p->gp_size, p->gp_start); 1416 } 1417 1418 fd = opendisk(disk, O_RDWR, diskpath, sizeof(diskpath), 0); 1419 if (fd < 0) 1420 return false; 1421 if (ioctl(fd, DIOCAWEDGE, &dkw) == -1) { 1422 if (errno == EINVAL) { 1423 /* sanitize existing wedges and try again */ 1424 gpt_sanitize(fd, parts, p); 1425 if (ioctl(fd, DIOCAWEDGE, &dkw) == 0) 1426 goto ok; 1427 } 1428 close(fd); 1429 return false; 1430 } 1431ok: 1432 close(fd); 1433 1434 strlcpy(p->gp_dev_name, dkw.dkw_devname, sizeof(p->gp_dev_name)); 1435 p->gp_flags |= GPEF_WEDGE; 1436 return true; 1437} 1438 1439static void 1440escape_spaces(char *dest, const char *src) 1441{ 1442 unsigned char c; 1443 1444 while (*src) { 1445 c = *src++; 1446 if (isspace(c) || c == '\\') 1447 *dest++ = '\\'; 1448 *dest++ = c; 1449 } 1450 *dest = 0; 1451} 1452 1453static bool 1454gpt_get_part_device(const struct disk_partitions *arg, 1455 part_id id, char *devname, size_t max_devname_len, int *part, 1456 enum dev_name_usage usage, bool with_path, bool life) 1457{ 1458 const struct gpt_disk_partitions *parts = 1459 (const struct gpt_disk_partitions*)arg; 1460 struct gpt_part_entry *p = parts->partitions; 1461 char tmpname[GPT_LABEL_LEN*2]; 1462 part_id no; 1463 1464 1465 for (no = 0; p != NULL && no < id; no++) 1466 p = p->gp_next; 1467 1468 if (no != id || p == NULL) 1469 return false; 1470 1471 if (part) 1472 *part = -1; 1473 1474 if (usage == logical_name && p->gp_label[0] == 0 && p->gp_id[0] == 0) 1475 usage = plain_name; 1476 if (usage == plain_name || usage == raw_dev_name) 1477 life = true; 1478 if (!(p->gp_flags & GPEF_WEDGE) && life && 1479 !gpt_add_wedge(arg->disk, p, parts)) 1480 return false; 1481 1482 switch (usage) { 1483 case logical_name: 1484 if (p->gp_label[0] != 0) { 1485 escape_spaces(tmpname, p->gp_label); 1486 snprintf(devname, max_devname_len, 1487 "NAME=%s", tmpname); 1488 } else { 1489 snprintf(devname, max_devname_len, 1490 "NAME=%s", p->gp_id); 1491 } 1492 break; 1493 case plain_name: 1494 assert(p->gp_flags & GPEF_WEDGE); 1495 if (with_path) 1496 snprintf(devname, max_devname_len, _PATH_DEV "%s", 1497 p->gp_dev_name); 1498 else 1499 strlcpy(devname, p->gp_dev_name, max_devname_len); 1500 break; 1501 case raw_dev_name: 1502 assert(p->gp_flags & GPEF_WEDGE); 1503 if (with_path) 1504 snprintf(devname, max_devname_len, _PATH_DEV "r%s", 1505 p->gp_dev_name); 1506 else 1507 snprintf(devname, max_devname_len, "r%s", 1508 p->gp_dev_name); 1509 break; 1510 default: 1511 return false; 1512 } 1513 1514 return true; 1515} 1516 1517static bool 1518gpt_write_to_disk(struct disk_partitions *arg) 1519{ 1520 struct gpt_disk_partitions *parts = (struct gpt_disk_partitions*)arg; 1521 struct gpt_part_entry *p, *n; 1522 char label_arg[sizeof(p->gp_label) + 10]; 1523 char diskpath[MAXPATHLEN]; 1524 int fd, bits = 0; 1525 bool root_is_new = false, efi_is_new = false; 1526 part_id root_id = NO_PART, efi_id = NO_PART, pno; 1527 1528 /* 1529 * Remove all wedges on this disk - they may become invalid and we 1530 * have no easy way to associate them with the partitioning data. 1531 * Instead we will explicitly request creation of wedges on demand 1532 * later. 1533 */ 1534 fd = opendisk(arg->disk, O_RDWR, diskpath, sizeof(diskpath), 0); 1535 if (fd < 0) 1536 return false; 1537 if (ioctl(fd, DIOCRMWEDGES, &bits) == -1) 1538 return false; 1539 close(fd); 1540 1541 /* 1542 * Collect first root and efi partition (if available), clear 1543 * "have wedge" flags. 1544 */ 1545 for (pno = 0, p = parts->partitions; p != NULL; p = p->gp_next, pno++) { 1546 p->gp_flags &= ~GPEF_WEDGE; 1547 if (root_id == NO_PART && p->gp_type != NULL) { 1548 if (p->gp_type->gent.generic_ptype == PT_root && 1549 (p->gp_flags & GPEF_TARGET)) { 1550 root_id = pno; 1551 root_is_new = !(p->gp_flags & GPEF_ON_DISK); 1552 } else if (efi_id == NO_PART && 1553 p->gp_type->gent.generic_ptype == PT_EFI_SYSTEM) { 1554 efi_id = pno; 1555 efi_is_new = !(p->gp_flags & GPEF_ON_DISK); 1556 } 1557 } 1558 } 1559 1560 /* 1561 * If no GPT on disk yet, create it. 1562 */ 1563 if (!parts->has_gpt) { 1564 char limit[30]; 1565 1566 if (parts->max_num_parts > 0) 1567 sprintf(limit, "-p %zu", parts->max_num_parts); 1568 else 1569 limit[0] = 0; 1570 if (run_program(RUN_SILENT, "gpt create %s %s", 1571 limit, parts->dp.disk)) 1572 return false; 1573 parts->has_gpt = true; 1574 } 1575 1576 /* 1577 * Delete all old partitions 1578 */ 1579 for (p = parts->obsolete; p != NULL; p = n) { 1580 run_program(RUN_SILENT, "gpt -n remove -b %" PRIu64 " %s", 1581 p->gp_start, arg->disk); 1582 n = p->gp_next; 1583 free(p); 1584 } 1585 parts->obsolete = NULL; 1586 1587 /* 1588 * Modify existing but changed partitions 1589 */ 1590 for (p = parts->partitions; p != NULL; p = p->gp_next) { 1591 if (!(p->gp_flags & GPEF_ON_DISK)) 1592 continue; 1593 1594 if (p->gp_flags & GPEF_RESIZED) { 1595 run_program(RUN_SILENT, 1596 "gpt -n resize -b %" PRIu64 " -s %" PRIu64 "s %s", 1597 p->gp_start, p->gp_size, arg->disk); 1598 p->gp_flags &= ~GPEF_RESIZED; 1599 } 1600 1601 if (!(p->gp_flags & GPEF_MODIFIED)) 1602 continue; 1603 1604 if (!gpt_modify_part(parts->dp.disk, p)) 1605 return false; 1606 } 1607 1608 /* 1609 * Add new partitions 1610 */ 1611 for (p = parts->partitions; p != NULL; p = p->gp_next) { 1612 if (p->gp_flags & GPEF_ON_DISK) 1613 continue; 1614 if (!(p->gp_flags & GPEF_MODIFIED)) 1615 continue; 1616 1617 if (p->gp_label[0] == 0) 1618 label_arg[0] = 0; 1619 else 1620 sprintf(label_arg, "-l \'%s\'", p->gp_label); 1621 1622 if (p->gp_type != NULL) 1623 run_program(RUN_SILENT, 1624 "gpt -n add -b %" PRIu64 " -s %" PRIu64 1625 "s -t %s %s %s", 1626 p->gp_start, p->gp_size, p->gp_type->tid, 1627 label_arg, arg->disk); 1628 else 1629 run_program(RUN_SILENT, 1630 "gpt -n add -b %" PRIu64 " -s %" PRIu64 1631 "s %s %s", 1632 p->gp_start, p->gp_size, label_arg, arg->disk); 1633 gpt_apply_attr(arg->disk, "set", p->gp_start, p->gp_attr); 1634 gpt_read_part(arg->disk, p->gp_start, p); 1635 p->gp_flags |= GPEF_ON_DISK; 1636 } 1637 1638 /* 1639 * Additional MD bootloader magic... 1640 */ 1641 if (!md_gpt_post_write(&parts->dp, root_id, root_is_new, efi_id, 1642 efi_is_new)) 1643 return false; 1644 1645 return true; 1646} 1647 1648static part_id 1649gpt_find_by_name(struct disk_partitions *arg, const char *name) 1650{ 1651 struct gpt_disk_partitions *parts = (struct gpt_disk_partitions*)arg; 1652 struct gpt_part_entry *p; 1653 part_id pno; 1654 1655 for (pno = 0, p = parts->partitions; p != NULL; 1656 p = p->gp_next, pno++) { 1657 if (strcmp(p->gp_label, name) == 0) 1658 return pno; 1659 if (strcmp(p->gp_id, name) == 0) 1660 return pno; 1661 } 1662 1663 return NO_PART; 1664} 1665 1666bool 1667gpt_parts_check(void) 1668{ 1669 1670 check_available_binaries(); 1671 1672 return have_gpt && have_dk; 1673} 1674 1675static void 1676gpt_free(struct disk_partitions *arg) 1677{ 1678 struct gpt_disk_partitions *parts = (struct gpt_disk_partitions*)arg; 1679 struct gpt_part_entry *p, *n; 1680 1681 assert(parts != NULL); 1682 for (p = parts->partitions; p != NULL; p = n) { 1683 free(__UNCONST(p->last_mounted)); 1684 n = p->gp_next; 1685 free(p); 1686 } 1687 free(__UNCONST(parts->dp.disk)); 1688 free(parts); 1689} 1690 1691static void 1692gpt_destroy_part_scheme(struct disk_partitions *arg) 1693{ 1694 1695 run_program(RUN_SILENT, "gpt destroy %s", arg->disk); 1696 gpt_free(arg); 1697} 1698 1699static bool 1700gpt_custom_attribute_writable(const struct disk_partitions *arg, 1701 part_id ptn, size_t attr_no) 1702{ 1703 const struct gpt_disk_partitions *parts = 1704 (const struct gpt_disk_partitions*)arg; 1705 size_t i; 1706 struct gpt_part_entry *p; 1707 1708 if (attr_no >= arg->pscheme->custom_attribute_count) 1709 return false; 1710 1711 const msg label = arg->pscheme->custom_attributes[attr_no].label; 1712 1713 /* we can not edit the uuid attribute */ 1714 if (label == MSG_ptn_uuid) 1715 return false; 1716 1717 /* the label is always editable */ 1718 if (label == MSG_ptn_label) 1719 return true; 1720 1721 /* the GPT type is read only */ 1722 if (label == MSG_ptn_gpt_type) 1723 return false; 1724 1725 /* BOOTME makes no sense on swap partitions */ 1726 for (i = 0, p = parts->partitions; p != NULL; i++, p = p->gp_next) 1727 if (i == ptn) 1728 break; 1729 1730 if (p == NULL) 1731 return false; 1732 1733 if (p->fs_type == FS_SWAP || 1734 (p->gp_type != NULL && p->gp_type->gent.generic_ptype == PT_swap)) 1735 return false; 1736 1737 return true; 1738} 1739 1740static const char * 1741gpt_get_label_str(const struct disk_partitions *arg, part_id ptn) 1742{ 1743 const struct gpt_disk_partitions *parts = 1744 (const struct gpt_disk_partitions*)arg; 1745 size_t i; 1746 struct gpt_part_entry *p; 1747 1748 for (i = 0, p = parts->partitions; p != NULL; i++, p = p->gp_next) 1749 if (i == ptn) 1750 break; 1751 1752 if (p == NULL) 1753 return NULL; 1754 1755 if (p->gp_label[0] != 0) 1756 return p->gp_label; 1757 return p->gp_id; 1758} 1759 1760static bool 1761gpt_format_custom_attribute(const struct disk_partitions *arg, 1762 part_id ptn, size_t attr_no, const struct disk_part_info *info, 1763 char *out, size_t out_space) 1764{ 1765 const struct gpt_disk_partitions *parts = 1766 (const struct gpt_disk_partitions*)arg; 1767 size_t i; 1768 struct gpt_part_entry *p, data; 1769 1770 for (i = 0, p = parts->partitions; p != NULL; i++, p = p->gp_next) 1771 if (i == ptn) 1772 break; 1773 1774 if (p == NULL) 1775 return false; 1776 1777 if (attr_no >= parts->dp.pscheme->custom_attribute_count) 1778 return false; 1779 1780 const msg label = parts->dp.pscheme->custom_attributes[attr_no].label; 1781 1782 if (info != NULL) { 1783 data = *p; 1784 gpt_info_to_part(&data, info, NULL); 1785 p = &data; 1786 } 1787 1788 if (label == MSG_ptn_label) 1789 strlcpy(out, p->gp_label, out_space); 1790 else if (label == MSG_ptn_uuid) 1791 strlcpy(out, p->gp_id, out_space); 1792 else if (label == MSG_ptn_gpt_type) { 1793 if (p->gp_type != NULL) 1794 strlcpy(out, p->gp_type->gent.description, out_space); 1795 else if (out_space > 1) 1796 out[0] = 0; 1797 } else if (label == MSG_ptn_boot) 1798 strlcpy(out, msg_string(p->gp_attr & GPT_ATTR_BOOT ? 1799 MSG_Yes : MSG_No), out_space); 1800 else 1801 return false; 1802 1803 return true; 1804} 1805 1806static bool 1807gpt_custom_attribute_toggle(struct disk_partitions *arg, 1808 part_id ptn, size_t attr_no) 1809{ 1810 const struct gpt_disk_partitions *parts = 1811 (const struct gpt_disk_partitions*)arg; 1812 size_t i; 1813 struct gpt_part_entry *p; 1814 1815 for (i = 0, p = parts->partitions; p != NULL; i++, p = p->gp_next) 1816 if (i == ptn) 1817 break; 1818 1819 if (p == NULL) 1820 return false; 1821 1822 if (attr_no >= parts->dp.pscheme->custom_attribute_count) 1823 return false; 1824 1825 const msg label = parts->dp.pscheme->custom_attributes[attr_no].label; 1826 if (label != MSG_ptn_boot) 1827 return false; 1828 1829 if (p->gp_attr & GPT_ATTR_BOOT) { 1830 p->gp_attr &= ~GPT_ATTR_BOOT; 1831 } else { 1832 for (i = 0, p = parts->partitions; p != NULL; 1833 i++, p = p->gp_next) 1834 if (i == ptn) 1835 p->gp_attr |= GPT_ATTR_BOOT; 1836 else 1837 p->gp_attr &= ~GPT_ATTR_BOOT; 1838 } 1839 return true; 1840} 1841 1842static bool 1843gpt_custom_attribute_set_str(struct disk_partitions *arg, 1844 part_id ptn, size_t attr_no, const char *new_val) 1845{ 1846 const struct gpt_disk_partitions *parts = 1847 (const struct gpt_disk_partitions*)arg; 1848 size_t i; 1849 struct gpt_part_entry *p; 1850 1851 for (i = 0, p = parts->partitions; p != NULL; i++, p = p->gp_next) 1852 if (i == ptn) 1853 break; 1854 1855 if (p == NULL) 1856 return false; 1857 1858 if (attr_no >= parts->dp.pscheme->custom_attribute_count) 1859 return false; 1860 1861 const msg label = parts->dp.pscheme->custom_attributes[attr_no].label; 1862 1863 if (label != MSG_ptn_label) 1864 return false; 1865 1866 strlcpy(p->gp_label, new_val, sizeof(p->gp_label)); 1867 return true; 1868} 1869 1870static bool 1871gpt_have_boot_support(const char *disk) 1872{ 1873#ifdef HAVE_GPT_BOOT 1874 return true; 1875#else 1876 return false; 1877#endif 1878} 1879 1880const struct disk_part_custom_attribute gpt_custom_attrs[] = { 1881 { .label = MSG_ptn_label, .type = pet_str }, 1882 { .label = MSG_ptn_uuid, .type = pet_str }, 1883 { .label = MSG_ptn_gpt_type, .type = pet_str }, 1884 { .label = MSG_ptn_boot, .type = pet_bool }, 1885}; 1886 1887const struct disk_partitioning_scheme 1888gpt_parts = { 1889 .name = MSG_parttype_gpt, 1890 .short_name = MSG_parttype_gpt_short, 1891 .part_flag_desc = MSG_gpt_flag_desc, 1892 .custom_attribute_count = __arraycount(gpt_custom_attrs), 1893 .custom_attributes = gpt_custom_attrs, 1894 .get_part_types_count = gpt_type_count, 1895 .get_part_type = gpt_get_ptype, 1896 .get_generic_part_type = gpt_get_generic_type, 1897 .get_fs_part_type = gpt_get_fs_part_type, 1898 .get_default_fstype = gpt_get_default_fstype, 1899 .create_custom_part_type = gpt_create_custom_part_type, 1900 .create_unknown_part_type = gpt_create_unknown_part_type, 1901 .get_part_alignment = gpt_get_part_alignment, 1902 .read_from_disk = gpt_read_from_disk, 1903 .get_cylinder_size = gpt_cyl_size, 1904 .create_new_for_disk = gpt_create_new, 1905 .have_boot_support = gpt_have_boot_support, 1906 .find_by_name = gpt_find_by_name, 1907 .can_add_partition = gpt_can_add_partition, 1908 .custom_attribute_writable = gpt_custom_attribute_writable, 1909 .format_custom_attribute = gpt_format_custom_attribute, 1910 .custom_attribute_toggle = gpt_custom_attribute_toggle, 1911 .custom_attribute_set_str = gpt_custom_attribute_set_str, 1912 .other_partition_identifier = gpt_get_label_str, 1913 .get_part_device = gpt_get_part_device, 1914 .max_free_space_at = gpt_max_free_space_at, 1915 .get_free_spaces = gpt_get_free_spaces, 1916 .adapt_foreign_part_info = generic_adapt_foreign_part_info, 1917 .get_part_info = gpt_get_part_info, 1918 .get_part_attr_str = gpt_get_part_attr_str, 1919 .set_part_info = gpt_set_part_info, 1920 .add_partition = gpt_add_part, 1921 .delete_all_partitions = gpt_delete_all_partitions, 1922 .delete_partition = gpt_delete_partition, 1923 .write_to_disk = gpt_write_to_disk, 1924 .free = gpt_free, 1925 .destroy_part_scheme = gpt_destroy_part_scheme, 1926 .cleanup = gpt_cleanup, 1927}; 1928