disk.c revision 108292
1/* 2 * ---------------------------------------------------------------------------- 3 * "THE BEER-WARE LICENSE" (Revision 42): 4 * <phk@FreeBSD.org> wrote this file. As long as you retain this notice you 5 * can do whatever you want with this stuff. If we meet some day, and you think 6 * this stuff is worth it, you can buy me a beer in return. Poul-Henning Kamp 7 * ---------------------------------------------------------------------------- 8 */ 9 10#include <sys/cdefs.h> 11__FBSDID("$FreeBSD: head/lib/libdisk/disk.c 108292 2002-12-26 15:50:45Z nyan $"); 12 13#include <stdio.h> 14#include <stdlib.h> 15#include <unistd.h> 16#include <fcntl.h> 17#include <string.h> 18#include <inttypes.h> 19#include <err.h> 20#include <sys/sysctl.h> 21#include <sys/stdint.h> 22#include <sys/types.h> 23#include <sys/stat.h> 24#include <sys/ioctl.h> 25#include <sys/disklabel.h> 26#include <sys/diskslice.h> 27#include <sys/uuid.h> 28#include <sys/gpt.h> 29#include <paths.h> 30#include "libdisk.h" 31 32#include <ctype.h> 33#include <errno.h> 34#include <assert.h> 35#include <uuid.h> 36 37#ifdef DEBUG 38#define DPRINT(x) warn x 39#define DPRINTX(x) warnx x 40#else 41#define DPRINT(x) 42#define DPRINTX(x) 43#endif 44 45const char * 46chunk_name(chunk_e type) 47{ 48 switch(type) { 49 case unused: return ("unused"); 50 case mbr: return ("mbr"); 51 case part: return ("part"); 52 case gpt: return ("gpt"); 53 case pc98: return ("pc98"); 54 case sun: return ("sun"); 55 case freebsd: return ("freebsd"); 56 case fat: return ("fat"); 57 case spare: return ("spare"); 58 case efi: return ("efi"); 59 default: return ("??"); 60 } 61}; 62 63static chunk_e 64uuid_type(uuid_t *uuid) 65{ 66 static uuid_t _efi = GPT_ENT_TYPE_EFI; 67 static uuid_t _mbr = GPT_ENT_TYPE_MBR; 68 static uuid_t _fbsd = GPT_ENT_TYPE_FREEBSD; 69 static uuid_t _swap = GPT_ENT_TYPE_FREEBSD_SWAP; 70 static uuid_t _ufs = GPT_ENT_TYPE_FREEBSD_UFS; 71 static uuid_t _vinum = GPT_ENT_TYPE_FREEBSD_VINUM; 72 73 if (uuid_is_nil(uuid, NULL)) 74 return (unused); 75 if (uuid_equal(uuid, &_efi, NULL)) 76 return (efi); 77 if (uuid_equal(uuid, &_mbr, NULL)) 78 return (mbr); 79 if (uuid_equal(uuid, &_fbsd, NULL)) 80 return (freebsd); 81 if (uuid_equal(uuid, &_swap, NULL)) 82 return (part); 83 if (uuid_equal(uuid, &_ufs, NULL)) 84 return (part); 85 if (uuid_equal(uuid, &_vinum, NULL)) 86 return (part); 87 return (spare); 88} 89 90struct disk * 91Open_Disk(const char *name) 92{ 93 94 return Int_Open_Disk(name); 95} 96 97struct disk * 98Int_Open_Disk(const char *name) 99{ 100 uuid_t uuid; 101 char *conftxt = NULL; 102 struct disk *d; 103 size_t txtsize; 104 int error, i; 105 char *p, *q, *r, *a, *b, *n, *t, *sn; 106 off_t o, len, off; 107 u_int l, s, ty, sc, hd, alt; 108 off_t lo[10]; 109 110 error = sysctlbyname("kern.geom.conftxt", NULL, &txtsize, NULL, 0); 111 if (error) { 112 warn("kern.geom.conftxt sysctl not available, giving up!"); 113 return (NULL); 114 } 115 conftxt = (char *) malloc(txtsize+1); 116 if (conftxt == NULL) { 117 DPRINT(("cannot malloc memory for conftxt")); 118 return (NULL); 119 } 120 error = sysctlbyname("kern.geom.conftxt", conftxt, &txtsize, NULL, 0); 121 if (error) { 122 DPRINT(("error reading kern.geom.conftxt from the system")); 123 free(conftxt); 124 return (NULL); 125 } 126 conftxt[txtsize] = '\0'; /* in case kernel bug is still there */ 127 128 for (p = conftxt; p != NULL && *p; p = strchr(p, '\n')) { 129 if (*p == '\n') 130 p++; 131 a = strsep(&p, " "); 132 if (strcmp(a, "0")) 133 continue; 134 135 a = strsep(&p, " "); 136 if (strcmp(a, "DISK")) 137 continue; 138 139 a = strsep(&p, " "); 140 if (strcmp(a, name)) 141 continue; 142 break; 143 } 144 145 q = strchr(p, '\n'); 146 if (q != NULL) 147 *q++ = '\0'; 148 149 d = (struct disk *)calloc(sizeof *d, 1); 150 if(d == NULL) 151 return NULL; 152 153 d->name = strdup(name); 154 155 a = strsep(&p, " "); /* length in bytes */ 156 len = strtoimax(a, &r, 0); 157 if (*r) { 158 printf("BARF %d <%d>\n", __LINE__, *r); 159 exit (0); 160 } 161 162 a = strsep(&p, " "); /* sectorsize */ 163 s = strtoul(a, &r, 0); 164 if (*r) { 165 printf("BARF %d <%d>\n", __LINE__, *r); 166 exit (0); 167 } 168 169 if (s == 0) 170 return (NULL); 171 d->sector_size = s; 172 len /= s; /* media size in number of sectors. */ 173 174 if (Add_Chunk(d, 0, len, name, whole, 0, 0, "-")) 175 DPRINT(("Failed to add 'whole' chunk")); 176 177 for (;;) { 178 a = strsep(&p, " "); 179 if (a == NULL) 180 break; 181 b = strsep(&p, " "); 182 o = strtoul(b, &r, 0); 183 if (*r) { 184 printf("BARF %d <%d>\n", __LINE__, *r); 185 exit (0); 186 } 187 if (!strcmp(a, "hd")) 188 d->bios_hd = o; 189 else if (!strcmp(a, "sc")) 190 d->bios_sect = o; 191 else 192 printf("HUH ? <%s> <%s>\n", a, b); 193 } 194 195 /* 196 * Calculate the number of cylinders this disk must have. If we have 197 * an obvious insanity, we set the number of cyclinders to zero. 198 */ 199 o = d->bios_hd * d->bios_sect; 200 d->bios_cyl = (o != 0) ? len / o : 0; 201 202 p = q; 203 lo[0] = 0; 204 205 for (; p != NULL && *p; p = q) { 206 q = strchr(p, '\n'); 207 if (q != NULL) 208 *q++ = '\0'; 209 a = strsep(&p, " "); /* Index */ 210 if (!strcmp(a, "0")) 211 break; 212 l = strtoimax(a, &r, 0); 213 if (*r) { 214 printf("BARF %d <%d>\n", __LINE__, *r); 215 exit (0); 216 } 217 t = strsep(&p, " "); /* Type {SUN, BSD, MBR, PC98, GPT} */ 218 n = strsep(&p, " "); /* name */ 219 a = strsep(&p, " "); /* len */ 220 len = strtoimax(a, &r, 0); 221 if (*r) { 222 printf("BARF %d <%d>\n", __LINE__, *r); 223 exit (0); 224 } 225 a = strsep(&p, " "); /* secsize */ 226 s = strtoimax(a, &r, 0); 227 if (*r) { 228 printf("BARF %d <%d>\n", __LINE__, *r); 229 exit (0); 230 } 231 for (;;) { 232 a = strsep(&p, " "); 233 if (a == NULL) 234 break; 235 /* XXX: Slice name may include a space. */ 236 if (!strcmp(a, "sn")) { 237 sn = p; 238 break; 239 } 240 b = strsep(&p, " "); 241 o = strtoimax(b, &r, 0); 242 if (*r) { 243 uint32_t status; 244 245 uuid_from_string(b, &uuid, &status); 246 if (status != uuid_s_ok) { 247 printf("BARF %d <%d>\n", __LINE__, *r); 248 exit (0); 249 } 250 o = uuid_type(&uuid); 251 } 252 if (!strcmp(a, "o")) 253 off = o; 254 else if (!strcmp(a, "i")) 255 i = o; 256 else if (!strcmp(a, "ty")) 257 ty = o; 258 else if (!strcmp(a, "sc")) 259 sc = o; 260 else if (!strcmp(a, "hd")) 261 hd = o; 262 else if (!strcmp(a, "alt")) 263 alt = o; 264 } 265 266 /* PLATFORM POLICY BEGIN ----------------------------------- */ 267 if (platform == p_sparc64 && !strcmp(t, "SUN") && i == 2) 268 continue; 269 if (platform == p_sparc64 && !strcmp(t, "SUN") && 270 d->chunks->part->part == NULL) { 271 d->bios_hd = hd; 272 d->bios_sect = sc; 273 o = d->chunks->size / (hd * sc); 274 o *= (hd * sc); 275 o -= alt * hd * sc; 276 if (Add_Chunk(d, 0, o, name, freebsd, 0, 0, "-")) 277 DPRINT(("Failed to add 'freebsd' chunk")); 278 } 279 if (platform == p_alpha && !strcmp(t, "BSD") && 280 d->chunks->part->part == NULL) { 281 if (Add_Chunk(d, 0, d->chunks->size, name, freebsd, 282 0, 0, "-")) 283 DPRINT(("Failed to add 'freebsd' chunk")); 284 } 285 if (!strcmp(t, "BSD") && i == RAW_PART) 286 continue; 287 /* PLATFORM POLICY END ------------------------------------- */ 288 289 off /= s; 290 len /= s; 291 off += lo[l - 1]; 292 lo[l] = off; 293 if (!strcmp(t, "SUN")) 294 i = Add_Chunk(d, off, len, n, part, 0, 0, 0); 295 else if (!strncmp(t, "MBR", 3)) { 296 switch (ty) { 297 case 0xa5: 298 i = Add_Chunk(d, off, len, n, freebsd, ty, 0, 0); 299 break; 300 case 0x01: 301 case 0x04: 302 case 0x06: 303 case 0x0b: 304 case 0x0c: 305 case 0x0e: 306 i = Add_Chunk(d, off, len, n, fat, ty, 0, 0); 307 break; 308 case 0xef: /* EFI */ 309 i = Add_Chunk(d, off, len, n, efi, ty, 0, 0); 310 break; 311 default: 312 i = Add_Chunk(d, off, len, n, mbr, ty, 0, 0); 313 break; 314 } 315 } else if (!strcmp(t, "BSD")) 316 i = Add_Chunk(d, off, len, n, part, 0, 0, 0); 317 else if (!strcmp(t, "PC98")) { 318 switch (ty & 0x7f) { 319 case 0x14: 320 i = Add_Chunk(d, off, len, n, freebsd, ty, 0, 321 sn); 322 break; 323 case 0x20: 324 case 0x21: 325 case 0x22: 326 case 0x23: 327 case 0x24: 328 i = Add_Chunk(d, off, len, n, fat, ty, 0, sn); 329 break; 330 default: 331 i = Add_Chunk(d, off, len, n, pc98, ty, 0, sn); 332 break; 333 } 334 } else if (!strcmp(t, "GPT")) 335 i = Add_Chunk(d, off, len, n, ty, 0, 0, 0); 336 else { 337 printf("BARF %d\n", __LINE__); 338 exit(0); 339 } 340 } 341 /* PLATFORM POLICY BEGIN ------------------------------------- */ 342 /* We have a chance to do things on a blank disk here */ 343 if (platform == p_sparc64 && d->chunks->part->part == NULL) { 344 hd = d->bios_hd; 345 sc = d->bios_sect; 346 o = d->chunks->size / (hd * sc); 347 o *= (hd * sc); 348 o -= 2 * hd * sc; 349 if (Add_Chunk(d, 0, o, name, freebsd, 0, 0, "-")) 350 DPRINT(("Failed to add 'freebsd' chunk")); 351 } 352 /* PLATFORM POLICY END --------------------------------------- */ 353 354 return (d); 355 i = 0; 356} 357 358void 359Debug_Disk(struct disk *d) 360{ 361 362 printf("Debug_Disk(%s)", d->name); 363#if 0 364 printf(" real_geom=%lu/%lu/%lu", 365 d->real_cyl, d->real_hd, d->real_sect); 366#endif 367 printf(" bios_geom=%lu/%lu/%lu = %lu\n", 368 d->bios_cyl, d->bios_hd, d->bios_sect, 369 d->bios_cyl * d->bios_hd * d->bios_sect); 370#if defined(PC98) 371 printf(" boot1=%p, boot2=%p, bootipl=%p, bootmenu=%p\n", 372 d->boot1, d->boot2, d->bootipl, d->bootmenu); 373#elif defined(__i386__) 374 printf(" boot1=%p, boot2=%p, bootmgr=%p\n", 375 d->boot1, d->boot2, d->bootmgr); 376#elif defined(__alpha__) 377 printf(" boot1=%p, bootmgr=%p\n", 378 d->boot1, d->bootmgr); 379#elif defined(__ia64__) 380 printf("\n"); 381#else 382/* Should be: error "Debug_Disk: unknown arch"; */ 383#endif 384 Debug_Chunk(d->chunks); 385} 386 387void 388Free_Disk(struct disk *d) 389{ 390 if (d->chunks) 391 Free_Chunk(d->chunks); 392 if (d->name) 393 free(d->name); 394#ifdef PC98 395 if (d->bootipl) 396 free(d->bootipl); 397 if (d->bootmenu) 398 free(d->bootmenu); 399#else 400#if !defined(__ia64__) 401 if (d->bootmgr) 402 free(d->bootmgr); 403#endif 404#endif 405#if !defined(__ia64__) 406 if (d->boot1) 407 free(d->boot1); 408#endif 409#if defined(__i386__) 410 if (d->boot2) 411 free(d->boot2); 412#endif 413 free(d); 414} 415 416#if 0 417void 418Collapse_Disk(struct disk *d) 419{ 420 421 while (Collapse_Chunk(d, d->chunks)) 422 ; 423} 424#endif 425 426static int 427qstrcmp(const void* a, const void* b) 428{ 429 char *str1 = *(char**)a; 430 char *str2 = *(char**)b; 431 432 return strcmp(str1, str2); 433} 434 435char ** 436Disk_Names() 437{ 438 int disk_cnt; 439 static char **disks; 440 int error; 441 size_t listsize; 442 char *disklist; 443 444 error = sysctlbyname("kern.disks", NULL, &listsize, NULL, 0); 445 if (error) { 446 warn("kern.disks sysctl not available"); 447 return NULL; 448 } 449 450 disks = malloc(sizeof *disks * (1 + MAX_NO_DISKS)); 451 if (disks == NULL) 452 return NULL; 453 disklist = (char *)malloc(listsize + 1); 454 if (disklist == NULL) { 455 free(disks); 456 return NULL; 457 } 458 memset(disks,0,sizeof *disks * (1 + MAX_NO_DISKS)); 459 memset(disklist, 0, listsize + 1); 460 error = sysctlbyname("kern.disks", disklist, &listsize, NULL, 0); 461 if (error) { 462 free(disklist); 463 free(disks); 464 return NULL; 465 } 466 for (disk_cnt = 0; disk_cnt < MAX_NO_DISKS; disk_cnt++) { 467 disks[disk_cnt] = strsep(&disklist, " "); 468 if (disks[disk_cnt] == NULL) 469 break; 470 } 471 qsort(disks, disk_cnt, sizeof(char*), qstrcmp); 472 return disks; 473} 474 475#ifdef PC98 476void 477Set_Boot_Mgr(struct disk *d, const u_char *bootipl, const size_t bootipl_size, 478 const u_char *bootmenu, const size_t bootmenu_size) 479#else 480void 481Set_Boot_Mgr(struct disk *d, const u_char *b, const size_t s) 482#endif 483{ 484#if !defined(__ia64__) 485#ifdef PC98 486 if (d->sector_size == 0) 487 return; 488 if (bootipl_size % d->sector_size != 0) 489 return; 490 if (d->bootipl) 491 free(d->bootipl); 492 if (!bootipl) { 493 d->bootipl = NULL; 494 } else { 495 d->bootipl_size = bootipl_size; 496 d->bootipl = malloc(bootipl_size); 497 if (!d->bootipl) 498 return; 499 memcpy(d->bootipl, bootipl, bootipl_size); 500 } 501 502 if (bootmenu_size % d->sector_size != 0) 503 return; 504 if (d->bootmenu) 505 free(d->bootmenu); 506 if (!bootmenu) { 507 d->bootmenu = NULL; 508 } else { 509 d->bootmenu_size = bootmenu_size; 510 d->bootmenu = malloc(bootmenu_size); 511 if (!d->bootmenu) 512 return; 513 memcpy(d->bootmenu, bootmenu, bootmenu_size); 514 } 515#else 516 if (d->sector_size == 0) 517 return; 518 if (s % d->sector_size != 0) 519 return; 520 if (d->bootmgr) 521 free(d->bootmgr); 522 if (!b) { 523 d->bootmgr = NULL; 524 } else { 525 d->bootmgr_size = s; 526 d->bootmgr = malloc(s); 527 if (!d->bootmgr) 528 return; 529 memcpy(d->bootmgr, b, s); 530 } 531#endif 532#endif 533} 534 535int 536Set_Boot_Blocks(struct disk *d, const u_char *b1, const u_char *b2) 537{ 538#if defined(__i386__) 539 if (d->boot1) 540 free(d->boot1); 541 d->boot1 = malloc(512); 542 if (!d->boot1) 543 return -1; 544 memcpy(d->boot1, b1, 512); 545 if (d->boot2) 546 free(d->boot2); 547 d->boot2 = malloc(15 * 512); 548 if (!d->boot2) 549 return -1; 550 memcpy(d->boot2, b2, 15 * 512); 551#elif defined(__alpha__) 552 if (d->boot1) 553 free(d->boot1); 554 d->boot1 = malloc(15 * 512); 555 if (!d->boot1) 556 return -1; 557 memcpy(d->boot1, b1, 15 * 512); 558#elif defined(__sparc64__) 559 if (d->boot1 != NULL) 560 free(d->boot1); 561 d->boot1 = malloc(16 * 512); 562 if (d->boot1 == NULL) 563 return (-1); 564 memcpy(d->boot1, b1, 16 * 512); 565#elif defined(__ia64__) 566 /* nothing */ 567#else 568/* Should be: #error "Set_Boot_Blocks: unknown arch"; */ 569#endif 570 return 0; 571} 572 573#ifdef PC98 574const char * 575slice_type_name( int type, int subtype ) 576{ 577 578 switch (type) { 579 case whole: 580 return "whole"; 581 case fat: 582 return "fat"; 583 case freebsd: 584 switch (subtype) { 585 case 0xc494: return "freebsd"; 586 default: return "unknown"; 587 } 588 case unused: 589 return "unused"; 590 default: 591 return "unknown"; 592 } 593} 594#else /* PC98 */ 595const char * 596slice_type_name( int type, int subtype ) 597{ 598 599 switch (type) { 600 case whole: 601 return "whole"; 602 case mbr: 603 switch (subtype) { 604 case 1: return "fat (12-bit)"; 605 case 2: return "XENIX /"; 606 case 3: return "XENIX /usr"; 607 case 4: return "fat (16-bit,<=32Mb)"; 608 case 5: return "extended DOS"; 609 case 6: return "fat (16-bit,>32Mb)"; 610 case 7: return "NTFS/HPFS/QNX"; 611 case 8: return "AIX bootable"; 612 case 9: return "AIX data"; 613 case 10: return "OS/2 bootmgr"; 614 case 11: return "fat (32-bit)"; 615 case 12: return "fat (32-bit,LBA)"; 616 case 14: return "fat (16-bit,>32Mb,LBA)"; 617 case 15: return "extended DOS, LBA"; 618 case 18: return "Compaq Diagnostic"; 619 case 84: return "OnTrack diskmgr"; 620 case 100: return "Netware 2.x"; 621 case 101: return "Netware 3.x"; 622 case 115: return "SCO UnixWare"; 623 case 128: return "Minix 1.1"; 624 case 129: return "Minix 1.5"; 625 case 130: return "linux_swap"; 626 case 131: return "ext2fs"; 627 case 166: return "OpenBSD FFS"; /* 0xA6 */ 628 case 169: return "NetBSD FFS"; /* 0xA9 */ 629 case 182: return "OpenBSD"; /* dedicated */ 630 case 183: return "bsd/os"; 631 case 184: return "bsd/os swap"; 632 case 238: return "EFI GPT"; 633 case 239: return "EFI Sys. Part."; 634 default: return "unknown"; 635 } 636 case fat: 637 return "fat"; 638 case freebsd: 639 switch (subtype) { 640 case 165: return "freebsd"; 641 default: return "unknown"; 642 } 643 case extended: 644 return "extended"; 645 case part: 646 return "part"; 647 case efi: 648 return "efi"; 649 case unused: 650 return "unused"; 651 default: 652 return "unknown"; 653 } 654} 655#endif /* PC98 */ 656