disklabel.c revision 1.20
1/* $NetBSD: disklabel.c,v 1.20 2019/12/12 19:29:05 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 "md.h" 32#include <assert.h> 33#include <util.h> 34#include <paths.h> 35#include <sys/ioctl.h> 36#include <sys/param.h> 37 38const struct disk_partitioning_scheme disklabel_parts; 39 40/*************** disklabel ******************************************/ 41/* a disklabel based disk_partitions interface */ 42struct disklabel_disk_partitions { 43 struct disk_partitions dp; 44 struct disklabel l; 45 daddr_t ptn_alignment; 46 char last_mounted[MAXPARTITIONS][MOUNTLEN]; 47 uint fs_sub_type[MAXPARTITIONS]; 48}; 49 50/* 51 * Maximum number of disklabel partitions the current kernel supports 52 */ 53size_t dl_maxpart; 54 55/* index into this arrray is the type code */ 56static struct part_type_desc dl_types[__arraycount(fstypenames)-1]; 57 58struct dl_custom_ptype { 59 unsigned int type; 60 char short_desc[6], description[30]; 61 struct part_type_desc desc; 62}; 63struct dl_custom_ptype * dl_custom_ptypes; 64size_t dl_custom_ptype_count; 65 66static uint8_t dl_part_type_from_generic(const struct part_type_desc*); 67 68static void 69disklabel_init_default_alignment(struct disklabel_disk_partitions *parts, 70 uint track) 71{ 72 if (track == 0) 73 track = MEG / 512; 74 75 if (dl_maxpart == 0) 76 dl_maxpart = getmaxpartitions(); 77 78#ifdef MD_DISKLABEL_SET_ALIGN_PRE 79 if (MD_DISKLABEL_SET_ALIGN_PRE(parts->ptn_alignment, track)) 80 return; 81#endif 82 /* Use 1MB alignemnt for large (>128GB) disks */ 83 if (parts->dp.disk_size > HUGE_DISK_SIZE) { 84 parts->ptn_alignment = 2048; 85 } else if (parts->dp.disk_size > TINY_DISK_SIZE) { 86 parts->ptn_alignment = 64; 87 } else { 88 parts->ptn_alignment = 1; 89 } 90#ifdef MD_DISKLABEL_SET_ALIGN_POST 91 MD_DISKLABEL_SET_ALIGN_POST(parts->ptn_alignment, track); 92#endif 93} 94 95static bool 96disklabel_change_geom(struct disk_partitions *arg, int ncyl, int nhead, 97 int nsec) 98{ 99 struct disklabel_disk_partitions *parts = 100 (struct disklabel_disk_partitions*)arg; 101 102 assert(parts->l.d_secsize != 0); 103 assert(parts->l.d_nsectors != 0); 104 assert(parts->l.d_ntracks != 0); 105 assert(parts->l.d_ncylinders != 0); 106 assert(parts->l.d_secpercyl != 0); 107 108 disklabel_init_default_alignment(parts, nhead * nsec); 109 if (ncyl*nhead*nsec <= TINY_DISK_SIZE) 110 set_default_sizemult(1); 111 else 112 set_default_sizemult(MEG/512); 113 114 return true; 115} 116 117static struct disk_partitions * 118disklabel_parts_new(const char *dev, daddr_t start, daddr_t len, 119 daddr_t total_size, bool is_boot_drive) 120{ 121 struct disklabel_disk_partitions *parts; 122 struct disk_geom geo; 123 124 if (!get_disk_geom(dev, &geo)) 125 return NULL; 126 127 parts = calloc(1, sizeof(*parts)); 128 if (parts == NULL) 129 return NULL; 130 131 if (len > disklabel_parts.size_limit) 132 len = disklabel_parts.size_limit; 133 if (total_size > disklabel_parts.size_limit) 134 total_size = disklabel_parts.size_limit; 135 136 parts->l.d_ncylinders = geo.dg_ncylinders; 137 parts->l.d_ntracks = geo.dg_ntracks; 138 parts->l.d_nsectors = geo.dg_nsectors; 139 parts->l.d_secsize = geo.dg_secsize; 140 parts->l.d_secpercyl = geo.dg_nsectors * geo.dg_ntracks; 141 142 parts->dp.pscheme = &disklabel_parts; 143 parts->dp.disk = strdup(dev); 144 parts->dp.disk_start = start; 145 parts->dp.disk_size = parts->dp.free_space = len; 146 disklabel_init_default_alignment(parts, parts->l.d_secpercyl); 147 148 strncpy(parts->l.d_packname, "fictious", sizeof parts->l.d_packname); 149 150#if RAW_PART > 2 151 parts->l.d_partitions[RAW_PART-1].p_fstype = FS_UNUSED; 152 parts->l.d_partitions[RAW_PART-1].p_offset = start; 153 parts->l.d_partitions[RAW_PART-1].p_size = len; 154 parts->dp.num_part++; 155#endif 156 parts->l.d_partitions[RAW_PART].p_fstype = FS_UNUSED; 157 parts->l.d_partitions[RAW_PART].p_offset = 0; 158 parts->l.d_partitions[RAW_PART].p_size = total_size; 159 parts->dp.num_part++; 160 161 parts->l.d_npartitions = RAW_PART+1; 162 163 return &parts->dp; 164} 165 166static struct disk_partitions * 167disklabel_parts_read(const char *disk, daddr_t start, daddr_t len, 168 const struct disk_partitioning_scheme *scheme) 169{ 170 int fd; 171 char diskpath[MAXPATHLEN]; 172 uint flags; 173#ifndef DISKLABEL_NO_ONDISK_VERIFY 174 bool only_dl = only_have_disklabel(); 175 bool have_raw_label = false; 176 177 /* 178 * Verify we really have a disklabel. 179 */ 180 if (run_program(RUN_SILENT | RUN_ERROR_OK, 181 "disklabel -r %s", disk) == 0) 182 have_raw_label = true; 183#endif 184 185 /* read partitions */ 186 187 struct disklabel_disk_partitions *parts = calloc(1, sizeof(*parts)); 188 if (parts == NULL) 189 return NULL; 190 191 fd = opendisk(disk, O_RDONLY, diskpath, sizeof(diskpath), 0); 192 if (fd == -1) { 193 free(parts); 194 return NULL; 195 } 196 197 /* 198 * We should actually try to read the label inside the start/len 199 * boundary, but for simplicity just rely on the kernel and 200 * instead verify a FS_UNUSED partition at RAW_PART-1 (if 201 * RAW_PART > 'c') is within the given limits. 202 */ 203 if (ioctl(fd, DIOCGDINFO, &parts->l) < 0) { 204 free(parts); 205 close(fd); 206 return NULL; 207 } 208#if RAW_PART > 2 209 if (parts->l.d_partitions[RAW_PART-1].p_fstype == FS_UNUSED) { 210 daddr_t dlstart = parts->l.d_partitions[RAW_PART-1].p_offset; 211 daddr_t dlend = start + 212 parts->l.d_partitions[RAW_PART-1].p_size; 213 214 if (dlstart < start && dlend > (start+len)) { 215 assert(false); 216 free(parts); 217 close(fd); 218 return NULL; 219 } 220 } 221#endif 222 223 if (len > disklabel_parts.size_limit) 224 len = disklabel_parts.size_limit; 225 parts->dp.pscheme = scheme; 226 parts->dp.disk = strdup(disk); 227 parts->dp.disk_start = start; 228 parts->dp.disk_size = parts->dp.free_space = len; 229 disklabel_init_default_alignment(parts, 0); 230 231 for (int part = 0; part < parts->l.d_npartitions; part++) { 232 if (parts->l.d_partitions[part].p_fstype == FS_UNUSED 233 && parts->l.d_partitions[part].p_size == 0) 234 continue; 235 236 parts->dp.num_part++; 237 if (parts->l.d_partitions[part].p_fstype == FS_UNUSED) 238 continue; 239 240 flags = 0; 241 if (parts->l.d_partitions[part].p_fstype == FS_MSDOS) 242 flags = GLM_MAYBE_FAT32; 243 else if (parts->l.d_partitions[part].p_fstype == FS_BSDFFS) 244 flags = GLM_LIKELY_FFS; 245 if (flags != 0) { 246 uint fs_type, fs_sub_type; 247 const char *lm = get_last_mounted(fd, 248 parts->l.d_partitions[part].p_offset, 249 &fs_type, &fs_sub_type, flags); 250 if (lm != NULL && *lm != 0) { 251 strlcpy(parts->last_mounted[part], lm, 252 sizeof(parts->last_mounted[part])); 253 if (parts->l.d_partitions[part].p_fstype == 254 fs_type) 255 parts->fs_sub_type[part] = fs_sub_type; 256 canonicalize_last_mounted( 257 parts->last_mounted[part]); 258 } 259 } 260 261 if (parts->l.d_partitions[part].p_size > parts->dp.free_space) 262 parts->dp.free_space = 0; 263 else 264 parts->dp.free_space -= 265 parts->l.d_partitions[part].p_size; 266 } 267 close(fd); 268 269#ifndef DISKLABEL_NO_ONDISK_VERIFY 270 if (!have_raw_label && only_dl) { 271 bool found_real_part = false; 272 273 /* 274 * Check if kernel translation gave us "something" besides 275 * the raw or the whole-disk partition. 276 * If not: report missing disklabel. 277 */ 278 for (int part = 0; part < parts->l.d_npartitions; part++) { 279 if (parts->l.d_partitions[part].p_fstype == FS_UNUSED) 280 continue; 281 if (part == RAW_PART) 282 continue; 283 found_real_part = true; 284 break; 285 } 286 if (!found_real_part) { 287 /* no partion there yet */ 288 free(parts); 289 return NULL; 290 } 291 } 292#endif 293 294 return &parts->dp; 295} 296 297/* 298 * Escape a string for usage as a tag name in a capfile(5), 299 * we really know there is enough space in the destination buffer... 300 */ 301static void 302escape_capfile(char *dest, const char *src, size_t len) 303{ 304 while (*src && len > 0) { 305 if (*src == ':') 306 *dest++ = ' '; 307 else 308 *dest++ = *src; 309 src++; 310 len--; 311 } 312 *dest = 0; 313} 314 315static bool 316disklabel_write_to_disk(struct disk_partitions *arg) 317{ 318 struct disklabel_disk_partitions *parts = 319 (struct disklabel_disk_partitions*)arg; 320 FILE *f; 321 char fname[PATH_MAX], packname[sizeof(parts->l.d_packname)+1], 322 disktype[sizeof(parts->l.d_typename)+1]; 323 int i, rv = 0; 324 const char *disk = parts->dp.disk, *s; 325 const struct partition *lp; 326 char *d; 327 size_t n; 328 329 assert(parts->l.d_secsize != 0); 330 assert(parts->l.d_nsectors != 0); 331 assert(parts->l.d_ntracks != 0); 332 assert(parts->l.d_ncylinders != 0); 333 assert(parts->l.d_secpercyl != 0); 334 335 /* make sure we have a 0 terminated packname */ 336 strlcpy(packname, parts->l.d_packname, sizeof packname); 337 if (packname[0] == 0) 338 strcpy(packname, "fictious"); 339 340 /* fill typename with disk name prefix, if not already set */ 341 if (strlen(parts->l.d_typename) == 0) { 342 for (n = 0, d = parts->l.d_typename, s = disk; 343 *s && n < sizeof(parts->l.d_typename); d++, s++, n++) { 344 if (isdigit((unsigned char)*s)) 345 break; 346 *d = *s; 347 } 348 } 349 350 /* we need a valid disk type name, so enforce an arbitrary if 351 * above did not yield a usable one */ 352 if (strlen(parts->l.d_typename) == 0) 353 strncpy(parts->l.d_typename, "SCSI", 354 sizeof(parts->l.d_typename)); 355 escape_capfile(disktype, parts->l.d_typename, 356 sizeof(parts->l.d_typename)); 357 358 sprintf(fname, "/tmp/disklabel.%u", getpid()); 359 f = fopen(fname, "w"); 360 if (f == NULL) 361 return false; 362 363 lp = parts->l.d_partitions; 364 scripting_fprintf(NULL, "cat <<EOF >%s\n", fname); 365 scripting_fprintf(f, "%s|NetBSD installation generated:\\\n", 366 disktype); 367 scripting_fprintf(f, "\t:nc#%d:nt#%d:ns#%d:\\\n", 368 parts->l.d_ncylinders, parts->l.d_ntracks, parts->l.d_nsectors); 369 scripting_fprintf(f, "\t:sc#%d:su#%" PRIu32 ":\\\n", 370 parts->l.d_secpercyl, lp[RAW_PART].p_offset+lp[RAW_PART].p_size); 371 scripting_fprintf(f, "\t:se#%d:\\\n", parts->l.d_secsize); 372 373 for (i = 0; i < parts->l.d_npartitions; i++) { 374 scripting_fprintf(f, "\t:p%c#%" PRIu32 ":o%c#%" PRIu32 375 ":t%c=%s:", 'a'+i, (uint32_t)lp[i].p_size, 376 'a'+i, (uint32_t)lp[i].p_offset, 'a'+i, 377 getfslabelname(lp[i].p_fstype, 0)); 378 if (lp[i].p_fstype == FS_BSDLFS || 379 lp[i].p_fstype == FS_BSDFFS) 380 scripting_fprintf (f, "b%c#%" PRIu32 ":f%c#%" PRIu32 381 ":", 'a'+i, 382 (uint32_t)(lp[i].p_fsize * 383 lp[i].p_frag), 384 'a'+i, (uint32_t)lp[i].p_fsize); 385 386 if (i < parts->l.d_npartitions - 1) 387 scripting_fprintf(f, "\\\n"); 388 else 389 scripting_fprintf(f, "\n"); 390 } 391 scripting_fprintf(NULL, "EOF\n"); 392 393 fclose(f); 394 395 /* 396 * Label a disk using an MD-specific string DISKLABEL_CMD for 397 * to invoke disklabel. 398 * if MD code does not define DISKLABEL_CMD, this is a no-op. 399 * 400 * i386 port uses "/sbin/disklabel -w -r", just like i386 401 * miniroot scripts, though this may leave a bogus incore label. 402 * 403 * Sun ports should use DISKLABEL_CMD "/sbin/disklabel -w" 404 * to get incore to ondisk inode translation for the Sun proms. 405 */ 406#ifdef DISKLABEL_CMD 407 /* disklabel the disk */ 408 rv = run_program(RUN_DISPLAY, "%s -f %s %s '%s' '%s'", 409 DISKLABEL_CMD, fname, disk, disktype, packname); 410#endif 411 412 unlink(fname); 413 414 return rv == 0; 415} 416 417static bool 418disklabel_delete_all(struct disk_partitions *arg) 419{ 420 struct disklabel_disk_partitions *parts = 421 (struct disklabel_disk_partitions*)arg; 422 daddr_t total_size = parts->l.d_partitions[RAW_PART].p_size; 423 424 memset(&parts->l.d_partitions, 0, sizeof(parts->l.d_partitions)); 425 parts->dp.num_part = 0; 426 427#if RAW_PART > 2 428 parts->l.d_partitions[RAW_PART-1].p_fstype = FS_UNUSED; 429 parts->l.d_partitions[RAW_PART-1].p_offset = parts->dp.disk_start; 430 parts->l.d_partitions[RAW_PART-1].p_size = parts->dp.disk_size; 431 parts->dp.num_part++; 432#endif 433 parts->l.d_partitions[RAW_PART].p_fstype = FS_UNUSED; 434 parts->l.d_partitions[RAW_PART].p_offset = 0; 435 parts->l.d_partitions[RAW_PART].p_size = total_size; 436 parts->dp.num_part++; 437 438 parts->l.d_npartitions = RAW_PART+1; 439 return true; 440} 441 442static bool 443disklabel_delete(struct disk_partitions *arg, part_id id, 444 const char **err_msg) 445{ 446 struct disklabel_disk_partitions *parts = 447 (struct disklabel_disk_partitions*)arg; 448 part_id ndx; 449 450 ndx = 0; 451 for (int part = 0; part < parts->l.d_npartitions; part++) { 452 if (parts->l.d_partitions[part].p_fstype == FS_UNUSED 453 && parts->l.d_partitions[part].p_size == 0) 454 continue; 455 456 if (ndx == id) { 457 if (part == RAW_PART 458#if RAW_PART > 2 459 || part == RAW_PART-1 460#endif 461 ) { 462 if (err_msg) 463 *err_msg = msg_string( 464 MSG_part_not_deletable); 465 return false; 466 } 467 parts->l.d_partitions[part].p_size = 0; 468 parts->l.d_partitions[part].p_offset = 0; 469 parts->l.d_partitions[part].p_fstype = FS_UNUSED; 470 parts->dp.num_part--; 471 return true; 472 } 473 ndx++; 474 } 475 476 if (err_msg) 477 *err_msg = INTERNAL_ERROR; 478 return false; 479} 480 481static bool 482disklabel_delete_range(struct disk_partitions *arg, daddr_t r_start, 483 daddr_t r_size) 484{ 485 struct disklabel_disk_partitions *parts = 486 (struct disklabel_disk_partitions*)arg; 487 488 for (int part = 0; part < parts->l.d_npartitions; part++) { 489 if (parts->l.d_partitions[part].p_fstype == FS_UNUSED 490 && parts->l.d_partitions[part].p_size == 0) 491 continue; 492 493 if (part == RAW_PART) 494 continue; 495 496 daddr_t start = parts->l.d_partitions[part].p_offset; 497 daddr_t end = start + parts->l.d_partitions[part].p_size; 498 499#if RAW_PART > 2 500 if (part == RAW_PART - 1 && start == r_start && 501 r_start + r_size == end) 502 continue; 503#endif 504 505 if ((start >= r_start && start <= r_start+r_size) || 506 (end >= r_start && end <= r_start+r_size)) { 507 if (parts->dp.num_part > 1) 508 parts->dp.num_part--; 509 parts->dp.free_space += 510 parts->l.d_partitions[part].p_size; 511 parts->l.d_partitions[part].p_fstype = FS_UNUSED; 512 parts->l.d_partitions[part].p_size = 0; 513 } 514 } 515 516 return true; 517} 518 519static void 520dl_init_types(void) 521{ 522 for (size_t i = 0; i < __arraycount(dl_types); i++) { 523 if (fstypenames[i] == NULL) 524 break; 525 dl_types[i].short_desc = 526 dl_types[i].description = getfslabelname(i, 0); 527 enum part_type pt; 528 switch (i) { 529 case FS_UNUSED: pt = PT_undef; break; 530 case FS_BSDFFS: pt = PT_root; break; 531 case FS_SWAP: pt = PT_swap; break; 532 case FS_MSDOS: pt = PT_FAT; break; 533 default: pt = PT_unknown; break; 534 } 535 dl_types[i].generic_ptype = pt; 536 } 537} 538 539static uint8_t 540dl_part_type_from_generic(const struct part_type_desc *gent) 541{ 542 543 if (dl_types[0].description == NULL) 544 dl_init_types(); 545 for (size_t i = 0; i < __arraycount(dl_types); i++) 546 if (gent == &dl_types[i]) 547 return (uint8_t)i; 548 549 for (size_t i = 0; i < dl_custom_ptype_count; i++) 550 if (gent == &dl_custom_ptypes[i].desc) 551 return dl_custom_ptypes[i].type; 552 553 return 0; 554} 555 556static size_t 557disklabel_type_count(void) 558{ 559 return __arraycount(dl_types) + dl_custom_ptype_count; 560} 561 562static const struct part_type_desc * 563disklabel_get_type(size_t ndx) 564{ 565 if (dl_types[0].description == NULL) 566 dl_init_types(); 567 568 if (ndx < __arraycount(dl_types)) 569 return &dl_types[ndx]; 570 571 ndx -= __arraycount(dl_types); 572 if (ndx >= dl_custom_ptype_count) 573 return NULL; 574 575 return &dl_custom_ptypes[ndx].desc; 576} 577 578static const struct part_type_desc * 579disklabel_find_type(uint type, bool create_if_unknown) 580{ 581 if (dl_types[0].description == NULL) 582 dl_init_types(); 583 584 if (type < __arraycount(dl_types)) 585 return &dl_types[type]; 586 587 for (size_t i = 0; i < dl_custom_ptype_count; i++) 588 if (dl_custom_ptypes[i].type == type) 589 return &dl_custom_ptypes[i].desc; 590 591 if (create_if_unknown) { 592 struct dl_custom_ptype *nt; 593 594 nt = realloc(dl_custom_ptypes, dl_custom_ptype_count+1); 595 if (nt == NULL) 596 return NULL; 597 dl_custom_ptypes = nt; 598 nt = dl_custom_ptypes + dl_custom_ptype_count; 599 dl_custom_ptype_count++; 600 memset(nt, 0, sizeof(*nt)); 601 nt->type = type; 602 snprintf(nt->short_desc, sizeof(nt->short_desc), "%u", type); 603 nt->short_desc[sizeof(nt->short_desc)-1] = 0; 604 snprintf(nt->description, sizeof(nt->description), 605 "%s (%u)", msg_string(MSG_custom_type), type); 606 nt->description[sizeof(nt->description)-1] = 0; 607 nt->desc.generic_ptype = PT_unknown; 608 nt->desc.short_desc = nt->short_desc; 609 nt->desc.description = nt->description; 610 return &nt->desc; 611 } 612 613 return NULL; 614} 615 616static const struct part_type_desc * 617disklabel_create_custom_part_type(const char *custom, const char **err_msg) 618{ 619 char *endp; 620 unsigned long fstype; 621 622 fstype = strtoul(custom, &endp, 10); 623 if (*endp != 0) { 624 if (err_msg) 625 *err_msg = msg_string(MSG_dl_type_invalid); 626 return NULL; 627 } 628 629 return disklabel_find_type(fstype, true); 630} 631 632static const struct part_type_desc * 633disklabel_get_fs_part_type(unsigned fstype, unsigned subtype) 634{ 635 return disklabel_find_type(fstype, false); 636} 637 638static const struct part_type_desc * 639disklabel_create_unknown_part_type(void) 640{ 641 return disklabel_find_type(FS_OTHER, false); 642} 643 644static const struct part_type_desc * 645disklabel_get_generic_type(enum part_type pt) 646{ 647 size_t nt; 648 649 if (dl_types[0].description == NULL) 650 dl_init_types(); 651 652 switch (pt) { 653 case PT_root: nt = FS_BSDFFS; break; 654 case PT_swap: nt = FS_SWAP; break; 655 case PT_FAT: 656 case PT_EFI_SYSTEM: 657 nt = FS_MSDOS; break; 658 default: nt = FS_UNUSED; break; 659 } 660 661 return disklabel_get_type(nt); 662} 663 664static bool 665disklabel_get_part_info(const struct disk_partitions *arg, part_id id, 666 struct disk_part_info *info) 667{ 668 const struct disklabel_disk_partitions *parts = 669 (const struct disklabel_disk_partitions*)arg; 670 part_id ndx; 671 672 if (dl_types[0].description == NULL) 673 dl_init_types(); 674 675 ndx = 0; 676 for (int part = 0; part < parts->l.d_npartitions; part++) { 677 if (parts->l.d_partitions[part].p_fstype == FS_UNUSED 678 && parts->l.d_partitions[part].p_size == 0) 679 continue; 680 681 if (ndx == id) { 682 memset(info, 0, sizeof(*info)); 683 info->start = parts->l.d_partitions[part].p_offset; 684 info->size = parts->l.d_partitions[part].p_size; 685 info->nat_type = disklabel_find_type( 686 parts->l.d_partitions[part].p_fstype, true); 687 if (parts->last_mounted[part][0] != 0) 688 info->last_mounted = parts->last_mounted[part]; 689 info->fs_type = parts->l.d_partitions[part].p_fstype; 690 info->fs_sub_type = parts->fs_sub_type[part]; 691 if (part == RAW_PART && 692 parts->l.d_partitions[part].p_fstype == FS_UNUSED) 693 info->flags |= 694 PTI_PSCHEME_INTERNAL|PTI_RAW_PART; 695#if RAW_PART > 2 696 if (part == (RAW_PART-1) && 697 parts->l.d_partitions[part].p_fstype == FS_UNUSED) 698 info->flags |= 699 PTI_PSCHEME_INTERNAL|PTI_WHOLE_DISK; 700#endif 701 return true; 702 } 703 704 ndx++; 705 if (ndx > parts->dp.num_part || ndx > id) 706 break; 707 } 708 709 return false; 710} 711 712static bool 713disklabel_set_part_info(struct disk_partitions *arg, part_id id, 714 const struct disk_part_info *info, const char **err_msg) 715{ 716 struct disklabel_disk_partitions *parts = 717 (struct disklabel_disk_partitions*)arg; 718 part_id ndx; 719 720 if (dl_types[0].description == NULL) 721 dl_init_types(); 722 723 ndx = 0; 724 for (int part = 0; part < parts->l.d_npartitions; part++) { 725 if (parts->l.d_partitions[part].p_fstype == FS_UNUSED 726 && parts->l.d_partitions[part].p_size == 0) 727 continue; 728 729 if (ndx == id) { 730 parts->l.d_partitions[part].p_offset = info->start; 731 parts->l.d_partitions[part].p_size = info->size; 732 parts->l.d_partitions[part].p_fstype = 733 dl_part_type_from_generic(info->nat_type); 734 if (info->last_mounted != NULL && 735 info->last_mounted != parts->last_mounted[part]) 736 strlcpy(parts->last_mounted[part], 737 info->last_mounted, 738 sizeof(parts->last_mounted[part])); 739 assert(info->fs_type == 0 || info->fs_type == 740 parts->l.d_partitions[part].p_fstype); 741 if (info->fs_sub_type != 0) 742 parts->fs_sub_type[part] = info->fs_sub_type; 743 return true; 744 } 745 746 ndx++; 747 if (ndx > parts->dp.num_part || ndx > id) 748 break; 749 } 750 751 return false; 752} 753 754static size_t 755disklabel_get_free_spaces_internal(const struct 756 disklabel_disk_partitions *parts, 757 struct disk_part_free_space *result, size_t max_num_result, 758 daddr_t min_space_size, daddr_t align, daddr_t start, daddr_t ignore) 759{ 760 size_t cnt = 0, i; 761 daddr_t s, e, from, size, end_of_disk; 762 763 if (start < parts->dp.disk_start) 764 start = parts->dp.disk_start; 765 if (min_space_size < 1) 766 min_space_size = 1; 767 if (align > 1 && (start % align) != 0) 768 start = max(roundup(start, align), align); 769 end_of_disk = parts->dp.disk_start + parts->dp.disk_size; 770 from = start; 771 while (from < end_of_disk && cnt < max_num_result) { 772again: 773 size = parts->dp.disk_start + parts->dp.disk_size - from; 774 start = from; 775 for (i = 0; i < parts->l.d_npartitions; i++) { 776 if (i == RAW_PART) 777 continue; 778 if (parts->l.d_partitions[i].p_fstype == FS_UNUSED) 779 continue; 780 if (parts->l.d_partitions[i].p_size == 0) 781 continue; 782 783 s = parts->l.d_partitions[i].p_offset; 784 e = parts->l.d_partitions[i].p_size + s; 785 if (s == ignore) 786 continue; 787 if (e < from) 788 continue; 789 if (s <= from && e > from) { 790 if (e - 1 >= end_of_disk) 791 return cnt; 792 793 from = e + 1; 794 if (align > 1) { 795 from = max(roundup(from, align), align); 796 if (from >= end_of_disk) { 797 size = 0; 798 break; 799 } 800 } 801 goto again; 802 } 803 if (s > from && s - from < size) { 804 size = s - from; 805 } 806 } 807 if (size >= min_space_size) { 808 result->start = start; 809 result->size = size; 810 result++; 811 cnt++; 812 } 813 from += size + 1; 814 if (align > 1) 815 from = max(roundup(from, align), align); 816 } 817 818 return cnt; 819} 820 821static bool 822disklabel_can_add_partition(const struct disk_partitions *arg) 823{ 824 const struct disklabel_disk_partitions *parts = 825 (const struct disklabel_disk_partitions*)arg; 826 struct disk_part_free_space space; 827 int i; 828 829 if (dl_maxpart == 0) 830 dl_maxpart = getmaxpartitions(); 831 if (parts->dp.free_space < parts->ptn_alignment) 832 return false; 833 if (parts->dp.num_part >= dl_maxpart) 834 return false; 835 if (disklabel_get_free_spaces_internal(parts, &space, 1, 836 parts->ptn_alignment, parts->ptn_alignment, 0, -1) < 1) 837 return false; 838 839 for (i = 0; i < parts->l.d_npartitions; i++) { 840 if (i == RAW_PART) 841 continue; 842#if RAW_PART > 2 843 if (i == RAW_PART-1) 844 continue; 845#endif 846 if (parts->l.d_partitions[i].p_fstype == FS_UNUSED) 847 return true; 848 } 849 return false; 850} 851 852static bool 853disklabel_get_disk_pack_name(const struct disk_partitions *arg, 854 char *buf, size_t len) 855{ 856 const struct disklabel_disk_partitions *parts = 857 (const struct disklabel_disk_partitions*)arg; 858 859 strlcpy(buf, parts->l.d_packname, min(len, 860 sizeof(parts->l.d_packname)+1)); 861 return true; 862} 863 864static bool 865disklabel_set_disk_pack_name(struct disk_partitions *arg, const char *pack) 866{ 867 struct disklabel_disk_partitions *parts = 868 (struct disklabel_disk_partitions*)arg; 869 870 strncpy(parts->l.d_packname, pack, sizeof(parts->l.d_packname)); 871 return true; 872} 873 874static bool 875disklabel_get_part_device(const struct disk_partitions *arg, 876 part_id ptn, char *devname, size_t max_devname_len, int *part, 877 enum dev_name_usage which_name, bool with_path) 878{ 879 const struct disklabel_disk_partitions *parts = 880 (const struct disklabel_disk_partitions*)arg; 881 part_id id; 882 int part_index; 883 char pname; 884 885 if (ptn >= parts->l.d_npartitions) 886 return false; 887 888 for (id = part_index = 0; part_index < parts->l.d_npartitions; 889 part_index++) { 890 if (parts->l.d_partitions[part_index].p_fstype == FS_UNUSED && 891 parts->l.d_partitions[part_index].p_size == 0) 892 continue; 893 if (id == ptn) 894 break; 895 id++; 896 if (id > ptn) 897 return false; 898 } 899 900 if (part != 0) 901 *part = part_index; 902 903 pname = 'a'+ part_index; 904 905 switch (which_name) { 906 case parent_device_only: 907 strlcpy(devname, arg->disk, max_devname_len); 908 return true; 909 case logical_name: 910 case plain_name: 911 if (with_path) 912 snprintf(devname, max_devname_len, _PATH_DEV "%s%c", 913 arg->disk, pname); 914 else 915 snprintf(devname, max_devname_len, "%s%c", 916 arg->disk, pname); 917 return true; 918 case raw_dev_name: 919 if (with_path) 920 snprintf(devname, max_devname_len, _PATH_DEV "r%s%c", 921 arg->disk, pname); 922 else 923 snprintf(devname, max_devname_len, "r%s%c", 924 arg->disk, pname); 925 return true; 926 } 927 928 return false; 929} 930 931static part_id 932disklabel_add_partition(struct disk_partitions *arg, 933 const struct disk_part_info *info, const char **err_msg) 934{ 935 struct disklabel_disk_partitions *parts = 936 (struct disklabel_disk_partitions*)arg; 937 int i, part = -1; 938 part_id new_id; 939 struct disk_part_free_space space; 940 struct disk_part_info data = *info; 941 942 if (disklabel_get_free_spaces_internal(parts, &space, 1, 1, 1, 943 info->start, -1) < 1) { 944 if (err_msg) 945 *err_msg = msg_string(MSG_No_free_space); 946 return NO_PART; 947 } 948 if (data.size > space.size) 949 data.size = space.size; 950 daddr_t dend = data.start+data.size; 951 if (space.start > data.start) 952 data.start = space.start; 953 if (space.start + space.size < dend) 954 data.size = space.start+space.size-data.start; 955 956 if (dl_maxpart == 0) 957 dl_maxpart = getmaxpartitions(); 958 959 for (new_id = 0, i = 0; i < parts->l.d_npartitions; i++) { 960 if (parts->l.d_partitions[i].p_size > 0) 961 new_id++; 962 if (info->nat_type->generic_ptype != PT_root && 963 info->nat_type->generic_ptype != PT_swap && i < RAW_PART) 964 continue; 965 if (i == 0 && info->nat_type->generic_ptype != PT_root) 966 continue; 967 if (i == 1 && info->nat_type->generic_ptype != PT_swap) 968 continue; 969 if (i == RAW_PART) 970 continue; 971#if RAW_PART > 2 972 if (i == RAW_PART-1) 973 continue; 974#endif 975 if (parts->l.d_partitions[i].p_size > 0) 976 continue; 977 part = i; 978 break; 979 } 980 981 if (part < 0) { 982 if (parts->l.d_npartitions >= dl_maxpart) { 983 if (err_msg) 984 *err_msg = 985 msg_string(MSG_err_too_many_partitions); 986 return NO_PART; 987 } 988 989 part = parts->l.d_npartitions++; 990 } 991 parts->l.d_partitions[part].p_offset = data.start; 992 parts->l.d_partitions[part].p_size = data.size; 993 parts->l.d_partitions[part].p_fstype = 994 dl_part_type_from_generic(info->nat_type); 995 if (info->last_mounted && info->last_mounted[0]) 996 strlcpy(parts->last_mounted[part], info->last_mounted, 997 sizeof(parts->last_mounted[part])); 998 else 999 parts->last_mounted[part][0] = 0; 1000 parts->fs_sub_type[part] = info->fs_sub_type; 1001 parts->dp.num_part++; 1002 if (data.size <= parts->dp.free_space) 1003 parts->dp.free_space -= data.size; 1004 else 1005 parts->dp.free_space = 0; 1006 1007 return new_id; 1008} 1009 1010static part_id 1011disklabel_add_outer_partition(struct disk_partitions *arg, 1012 const struct disk_part_info *info, const char **err_msg) 1013{ 1014 struct disklabel_disk_partitions *parts = 1015 (struct disklabel_disk_partitions*)arg; 1016 int i, part = -1; 1017 part_id new_id; 1018 1019 if (dl_maxpart == 0) 1020 dl_maxpart = getmaxpartitions(); 1021 1022 for (new_id = 0, i = 0; i < parts->l.d_npartitions; i++) { 1023 if (parts->l.d_partitions[i].p_size > 0) 1024 new_id++; 1025 if (info->nat_type->generic_ptype != PT_root && 1026 info->nat_type->generic_ptype != PT_swap && i < RAW_PART) 1027 continue; 1028 if (i == 0 && info->nat_type->generic_ptype != PT_root) 1029 continue; 1030 if (i == 1 && info->nat_type->generic_ptype != PT_swap) 1031 continue; 1032 if (i == RAW_PART) 1033 continue; 1034#if RAW_PART > 2 1035 if (i == RAW_PART-1) 1036 continue; 1037#endif 1038 if (parts->l.d_partitions[i].p_size > 0) 1039 continue; 1040 part = i; 1041 break; 1042 } 1043 1044 if (part < 0) { 1045 if (parts->l.d_npartitions >= dl_maxpart) { 1046 if (err_msg) 1047 *err_msg = 1048 msg_string(MSG_err_too_many_partitions); 1049 return NO_PART; 1050 } 1051 1052 part = parts->l.d_npartitions++; 1053 } 1054 parts->l.d_partitions[part].p_offset = info->start; 1055 parts->l.d_partitions[part].p_size = info->size; 1056 parts->l.d_partitions[part].p_fstype = 1057 dl_part_type_from_generic(info->nat_type); 1058 if (info->last_mounted && info->last_mounted[0]) 1059 strlcpy(parts->last_mounted[part], info->last_mounted, 1060 sizeof(parts->last_mounted[part])); 1061 else 1062 parts->last_mounted[part][0] = 0; 1063 parts->fs_sub_type[part] = info->fs_sub_type; 1064 parts->dp.num_part++; 1065 1066 return new_id; 1067} 1068 1069static size_t 1070disklabel_get_free_spaces(const struct disk_partitions *arg, 1071 struct disk_part_free_space *result, size_t max_num_result, 1072 daddr_t min_space_size, daddr_t align, daddr_t start, daddr_t ignore) 1073{ 1074 const struct disklabel_disk_partitions *parts = 1075 (const struct disklabel_disk_partitions*)arg; 1076 1077 return disklabel_get_free_spaces_internal(parts, result, 1078 max_num_result, min_space_size, align, start, ignore); 1079} 1080 1081static daddr_t 1082disklabel_max_free_space_at(const struct disk_partitions *arg, daddr_t start) 1083{ 1084 const struct disklabel_disk_partitions *parts = 1085 (const struct disklabel_disk_partitions*)arg; 1086 struct disk_part_free_space space; 1087 1088 if (disklabel_get_free_spaces_internal(parts, &space, 1, 1, 0, 1089 start, start) == 1) 1090 return space.size; 1091 1092 return 0; 1093} 1094 1095static daddr_t 1096disklabel_get_alignment(const struct disk_partitions *arg) 1097{ 1098 const struct disklabel_disk_partitions *parts = 1099 (const struct disklabel_disk_partitions*)arg; 1100 1101 return parts->ptn_alignment; 1102} 1103 1104static part_id 1105disklabel_find_by_name(struct disk_partitions *arg, const char *name) 1106{ 1107 const struct disklabel_disk_partitions *parts = 1108 (const struct disklabel_disk_partitions*)arg; 1109 char *sl, part; 1110 ptrdiff_t n; 1111 part_id pno, id, i; 1112 1113 sl = strrchr(name, '/'); 1114 if (sl == NULL) 1115 return NO_PART; 1116 n = sl - name; 1117 if (strncmp(name, parts->l.d_packname, n) != 0) 1118 return NO_PART; 1119 part = name[n+1]; 1120 if (part < 'a') 1121 return NO_PART; 1122 pno = part - 'a'; 1123 if (pno >= parts->l.d_npartitions) 1124 return NO_PART; 1125 if (parts->l.d_partitions[pno].p_fstype == FS_UNUSED) 1126 return NO_PART; 1127 for (id = 0, i = 0; i < pno; i++) 1128 if (parts->l.d_partitions[i].p_fstype != FS_UNUSED || 1129 parts->l.d_partitions[i].p_size != 0) 1130 id++; 1131 return id; 1132} 1133 1134static void 1135disklabel_free(struct disk_partitions *arg) 1136{ 1137 1138 assert(arg != NULL); 1139 free(__UNCONST(arg->disk)); 1140 free(arg); 1141} 1142 1143const struct disk_partitioning_scheme 1144disklabel_parts = { 1145 .name = MSG_parttype_disklabel, 1146 .short_name = MSG_parttype_disklabel_short, 1147 .new_type_prompt = MSG_dl_get_custom_fstype, 1148 .size_limit = (daddr_t)UINT32_MAX, 1149 .write_to_disk = disklabel_write_to_disk, 1150 .read_from_disk = disklabel_parts_read, 1151 .create_new_for_disk = disklabel_parts_new, 1152 .change_disk_geom = disklabel_change_geom, 1153 .find_by_name = disklabel_find_by_name, 1154 .get_disk_pack_name = disklabel_get_disk_pack_name, 1155 .set_disk_pack_name = disklabel_set_disk_pack_name, 1156 .delete_all_partitions = disklabel_delete_all, 1157 .delete_partitions_in_range = disklabel_delete_range, 1158 .delete_partition = disklabel_delete, 1159 .get_part_types_count = disklabel_type_count, 1160 .get_part_type = disklabel_get_type, 1161 .get_generic_part_type = disklabel_get_generic_type, 1162 .get_fs_part_type = disklabel_get_fs_part_type, 1163 .create_custom_part_type = disklabel_create_custom_part_type, 1164 .create_unknown_part_type = disklabel_create_unknown_part_type, 1165 .get_part_alignment = disklabel_get_alignment, 1166 .adapt_foreign_part_info = generic_adapt_foreign_part_info, 1167 .get_part_info = disklabel_get_part_info, 1168 .can_add_partition = disklabel_can_add_partition, 1169 .set_part_info = disklabel_set_part_info, 1170 .add_partition = disklabel_add_partition, 1171 .add_outer_partition = disklabel_add_outer_partition, 1172 .max_free_space_at = disklabel_max_free_space_at, 1173 .get_free_spaces = disklabel_get_free_spaces, 1174 .get_part_device = disklabel_get_part_device, 1175 .free = disklabel_free, 1176}; 1177