disk.c revision 106837
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 106837 2002-11-13 05:31:32Z marcel $"); 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 return Int_Open_Disk(name); 94} 95 96struct disk * 97Int_Open_Disk(const char *name) 98{ 99 uuid_t uuid; 100 char *conftxt = NULL; 101 struct disk *d; 102 size_t txtsize; 103 int error, i; 104 char *p, *q, *r, *a, *b, *n, *t; 105 off_t o, len, off; 106 u_int l, s, ty, sc, hd, alt; 107 off_t lo[10]; 108 109 error = sysctlbyname("kern.geom.conftxt", NULL, &txtsize, NULL, 0); 110 if (error) { 111 warn("kern.geom.conftxt sysctl not available, giving up!"); 112 return (NULL); 113 } 114 conftxt = (char *) malloc(txtsize+1); 115 if (conftxt == NULL) { 116 DPRINT(("cannot malloc memory for conftxt")); 117 return (NULL); 118 } 119 error = sysctlbyname("kern.geom.conftxt", conftxt, &txtsize, NULL, 0); 120 if (error) { 121 DPRINT(("error reading kern.geom.conftxt from the system")); 122 free(conftxt); 123 return (NULL); 124 } 125 conftxt[txtsize] = '\0'; /* in case kernel bug is still there */ 126 127 for (p = conftxt; p != NULL && *p; p = strchr(p, '\n')) { 128 if (*p == '\n') 129 p++; 130 a = strsep(&p, " "); 131 if (strcmp(a, "0")) 132 continue; 133 134 a = strsep(&p, " "); 135 if (strcmp(a, "DISK")) 136 continue; 137 138 a = strsep(&p, " "); 139 if (strcmp(a, name)) 140 continue; 141 break; 142 } 143 144 q = strchr(p, '\n'); 145 if (q != NULL) 146 *q++ = '\0'; 147 148 d = (struct disk *)calloc(sizeof *d, 1); 149 if(d == NULL) 150 return NULL; 151 152 d->name = strdup(name); 153 154 a = strsep(&p, " "); /* length in bytes */ 155 len = strtoimax(a, &r, 0); 156 if (*r) { printf("BARF %d <%d>\n", __LINE__, *r); exit (0); } 157 158 a = strsep(&p, " "); /* sectorsize */ 159 s = strtoul(a, &r, 0); 160 if (*r) { printf("BARF %d <%d>\n", __LINE__, *r); exit (0); } 161 162 d->sector_size = s; 163 len /= s; /* media size in number of sectors. */ 164 165 if (Add_Chunk(d, 0, len, name, whole, 0, 0, "-")) 166 DPRINT(("Failed to add 'whole' chunk")); 167 168 for (;;) { 169 a = strsep(&p, " "); 170 if (a == NULL) 171 break; 172 b = strsep(&p, " "); 173 o = strtoul(b, &r, 0); 174 if (*r) { printf("BARF %d <%d>\n", __LINE__, *r); exit (0); } 175 if (!strcmp(a, "hd")) 176 d->bios_hd = o; 177 else if (!strcmp(a, "sc")) 178 d->bios_sect = o; 179 else 180 printf("HUH ? <%s> <%s>\n", a, b); 181 } 182 183 /* 184 * Calculate the number of cylinders this disk must have. If we have 185 * an obvious insanity, we set the number of cyclinders to zero. 186 */ 187 o = d->bios_hd * d->bios_sect; 188 d->bios_cyl = (o != 0 && (len % o) == 0) ? len / o : 0; 189 190 p = q; 191 lo[0] = 0; 192 193 for (; p != NULL && *p; p = q) { 194 q = strchr(p, '\n'); 195 if (q != NULL) 196 *q++ = '\0'; 197 a = strsep(&p, " "); /* Index */ 198 if (!strcmp(a, "0")) 199 break; 200 l = strtoimax(a, &r, 0); 201 if (*r) { printf("BARF %d <%d>\n", __LINE__, *r); exit (0); } 202 t = strsep(&p, " "); /* Type {SUN, BSD, MBR, GPT} */ 203 n = strsep(&p, " "); /* name */ 204 a = strsep(&p, " "); /* len */ 205 len = strtoimax(a, &r, 0); 206 if (*r) { printf("BARF %d <%d>\n", __LINE__, *r); exit (0); } 207 a = strsep(&p, " "); /* secsize */ 208 s = strtoimax(a, &r, 0); 209 if (*r) { printf("BARF %d <%d>\n", __LINE__, *r); exit (0); } 210 for (;;) { 211 a = strsep(&p, " "); 212 if (a == NULL) 213 break; 214 b = strsep(&p, " "); 215 o = strtoimax(b, &r, 0); 216 if (*r) { 217 uint32_t status; 218 219 uuid_from_string(b, &uuid, &status); 220 if (status != uuid_s_ok) { 221 printf("BARF %d <%d>\n", __LINE__, *r); 222 exit (0); 223 } 224 o = uuid_type(&uuid); 225 } 226 if (!strcmp(a, "o")) 227 off = o; 228 else if (!strcmp(a, "i")) 229 i = o; 230 else if (!strcmp(a, "ty")) 231 ty = o; 232 else if (!strcmp(a, "sc")) 233 sc = o; 234 else if (!strcmp(a, "hd")) 235 hd = o; 236 else if (!strcmp(a, "alt")) 237 alt = o; 238 } 239 240 /* PLATFORM POLICY BEGIN ------------------------------------- */ 241 if (platform == p_sparc64 && !strcmp(t, "SUN") && i == 2) 242 continue; 243 if (platform == p_sparc64 && !strcmp(t, "SUN") && 244 d->chunks->part->part == NULL) { 245 d->bios_hd = hd; 246 d->bios_sect = sc; 247 o = d->chunks->size / (hd * sc); 248 o *= (hd * sc); 249 o -= alt * hd * sc; 250 if (Add_Chunk(d, 0, o, name, freebsd, 0, 0, "-")) 251 DPRINT(("Failed to add 'freebsd' chunk")); 252 } 253 if (platform == p_alpha && !strcmp(t, "BSD") && 254 d->chunks->part->part == NULL) { 255 if (Add_Chunk(d, 0, d->chunks->size, name, freebsd, 0, 0, "-")) 256 DPRINT(("Failed to add 'freebsd' chunk")); 257 } 258 if (!strcmp(t, "BSD") && i == RAW_PART) 259 continue; 260 /* PLATFORM POLICY END --------------------------------------- */ 261 262 off /= s; 263 len /= s; 264 off += lo[l - 1]; 265 lo[l] = off; 266 if (!strcmp(t, "SUN")) 267 i = Add_Chunk(d, off, len, n, part, 0, 0, 0); 268 else if (!strncmp(t, "MBR", 3)) { 269 switch (ty) { 270 case 0xa5: 271 i = Add_Chunk(d, off, len, n, freebsd, ty, 0, 0); 272 break; 273 case 0x01: 274 case 0x04: 275 case 0x06: 276 case 0x0b: 277 case 0x0c: 278 case 0x0e: 279 i = Add_Chunk(d, off, len, n, fat, ty, 0, 0); 280 break; 281 case 0xef: /* EFI */ 282 i = Add_Chunk(d, off, len, n, efi, ty, 0, 0); 283 break; 284 default: 285 i = Add_Chunk(d, off, len, n, mbr, ty, 0, 0); 286 break; 287 } 288 } else if (!strcmp(t, "BSD")) 289 i = Add_Chunk(d, off, len, n, part, 0, 0, 0); 290 else if (!strcmp(t, "PC98")) { 291 switch (ty & 0x7f) { 292 case 0x14: 293 i = Add_Chunk(d, off, len, n, freebsd, ty, 0, 0); 294 break; 295 case 0x20: 296 case 0x21: 297 case 0x22: 298 case 0x23: 299 case 0x24: 300 i = Add_Chunk(d, off, len, n, fat, ty, 0, 0); 301 break; 302 default: 303 i = Add_Chunk(d, off, len, n, pc98, ty, 0, 0); 304 break; 305 } 306 } else if (!strcmp(t, "GPT")) 307 i = Add_Chunk(d, off, len, n, ty, 0, 0, 0); 308 else 309 { printf("BARF %d\n", __LINE__); exit(0); } 310 } 311 /* PLATFORM POLICY BEGIN ------------------------------------- */ 312 /* We have a chance to do things on a blank disk here */ 313 if (platform == p_sparc64 && d->chunks->part->part == NULL) { 314 hd = d->bios_hd; 315 sc = d->bios_sect; 316 o = d->chunks->size / (hd * sc); 317 o *= (hd * sc); 318 o -= 2 * hd * sc; 319 if (Add_Chunk(d, 0, o, name, freebsd, 0, 0, "-")) 320 DPRINT(("Failed to add 'freebsd' chunk")); 321 } 322 /* PLATFORM POLICY END --------------------------------------- */ 323 324 return (d); 325 i = 0; 326} 327 328void 329Debug_Disk(struct disk *d) 330{ 331 printf("Debug_Disk(%s)", d->name); 332#if 0 333 printf(" real_geom=%lu/%lu/%lu", d->real_cyl, d->real_hd, d->real_sect); 334#endif 335 printf(" bios_geom=%lu/%lu/%lu = %lu\n", 336 d->bios_cyl, d->bios_hd, d->bios_sect, 337 d->bios_cyl * d->bios_hd * d->bios_sect); 338#if defined(PC98) 339 printf(" boot1=%p, boot2=%p, bootipl=%p, bootmenu=%p\n", 340 d->boot1, d->boot2, d->bootipl, d->bootmenu); 341#elif defined(__i386__) 342 printf(" boot1=%p, boot2=%p, bootmgr=%p\n", 343 d->boot1, d->boot2, d->bootmgr); 344#elif defined(__alpha__) 345 printf(" boot1=%p, bootmgr=%p\n", 346 d->boot1, d->bootmgr); 347#elif defined(__ia64__) 348 printf("\n"); 349#else 350/* Should be: error "Debug_Disk: unknown arch"; */ 351#endif 352 Debug_Chunk(d->chunks); 353} 354 355void 356Free_Disk(struct disk *d) 357{ 358 if(d->chunks) Free_Chunk(d->chunks); 359 if(d->name) free(d->name); 360#ifdef PC98 361 if(d->bootipl) free(d->bootipl); 362 if(d->bootmenu) free(d->bootmenu); 363#else 364#if !defined(__ia64__) 365 if(d->bootmgr) free(d->bootmgr); 366#endif 367#endif 368#if !defined(__ia64__) 369 if(d->boot1) free(d->boot1); 370#endif 371#if defined(__i386__) 372 if(d->boot2) free(d->boot2); 373#endif 374 free(d); 375} 376 377#if 0 378void 379Collapse_Disk(struct disk *d) 380{ 381 382 while(Collapse_Chunk(d, d->chunks)) 383 ; 384} 385#endif 386 387static int 388qstrcmp(const void* a, const void* b) 389{ 390 391 char *str1 = *(char**)a; 392 char *str2 = *(char**)b; 393 return strcmp(str1, str2); 394} 395 396char ** 397Disk_Names() 398{ 399 int disk_cnt; 400 static char **disks; 401 int error; 402 size_t listsize; 403 char *disklist; 404 405 error = sysctlbyname("kern.disks", NULL, &listsize, NULL, 0); 406 if (error) { 407 warn("kern.disks sysctl not available"); 408 return NULL; 409 } 410 411 disks = malloc(sizeof *disks * (1 + MAX_NO_DISKS)); 412 if (disks == NULL) 413 return NULL; 414 disklist = (char *)malloc(listsize + 1); 415 if (disklist == NULL) { 416 free(disks); 417 return NULL; 418 } 419 memset(disks,0,sizeof *disks * (1 + MAX_NO_DISKS)); 420 memset(disklist, 0, listsize + 1); 421 error = sysctlbyname("kern.disks", disklist, &listsize, NULL, 0); 422 if (error) { 423 free(disklist); 424 free(disks); 425 return NULL; 426 } 427 for (disk_cnt = 0; disk_cnt < MAX_NO_DISKS; disk_cnt++) { 428 disks[disk_cnt] = strsep(&disklist, " "); 429 if (disks[disk_cnt] == NULL) 430 break; 431 } 432 qsort(disks, disk_cnt, sizeof(char*), qstrcmp); 433 return disks; 434} 435 436#ifdef PC98 437void 438Set_Boot_Mgr(struct disk *d, const u_char *bootipl, const size_t bootipl_size, 439 const u_char *bootmenu, const size_t bootmenu_size) 440#else 441void 442Set_Boot_Mgr(struct disk *d, const u_char *b, const size_t s) 443#endif 444{ 445#if !defined(__ia64__) 446#ifdef PC98 447 if (bootipl_size % d->sector_size != 0) 448 return; 449 if (d->bootipl) 450 free(d->bootipl); 451 if (!bootipl) { 452 d->bootipl = NULL; 453 } else { 454 d->bootipl_size = bootipl_size; 455 d->bootipl = malloc(bootipl_size); 456 if(!d->bootipl) return; 457 memcpy(d->bootipl, bootipl, bootipl_size); 458 } 459 460 if (bootmenu_size % d->sector_size != 0) 461 return; 462 if (d->bootmenu) 463 free(d->bootmenu); 464 if (!bootmenu) { 465 d->bootmenu = NULL; 466 } else { 467 d->bootmenu_size = bootmenu_size; 468 d->bootmenu = malloc(bootmenu_size); 469 if(!d->bootmenu) return; 470 memcpy(d->bootmenu, bootmenu, bootmenu_size); 471 } 472#else 473 if (s % d->sector_size != 0) 474 return; 475 if (d->bootmgr) 476 free(d->bootmgr); 477 if (!b) { 478 d->bootmgr = NULL; 479 } else { 480 d->bootmgr_size = s; 481 d->bootmgr = malloc(s); 482 if(!d->bootmgr) return; 483 memcpy(d->bootmgr, b, s); 484 } 485#endif 486#endif 487} 488 489int 490Set_Boot_Blocks(struct disk *d, const u_char *b1, const u_char *b2) 491{ 492#if defined(__i386__) 493 if (d->boot1) free(d->boot1); 494 d->boot1 = malloc(512); 495 if(!d->boot1) return -1; 496 memcpy(d->boot1, b1, 512); 497 if (d->boot2) free(d->boot2); 498 d->boot2 = malloc(15 * 512); 499 if(!d->boot2) return -1; 500 memcpy(d->boot2, b2, 15 * 512); 501#elif defined(__alpha__) 502 if (d->boot1) free(d->boot1); 503 d->boot1 = malloc(15 * 512); 504 if(!d->boot1) return -1; 505 memcpy(d->boot1, b1, 15 * 512); 506#elif defined(__sparc64__) 507 if (d->boot1 != NULL) 508 free(d->boot1); 509 d->boot1 = malloc(16 * 512); 510 if (d->boot1 == NULL) 511 return (-1); 512 memcpy(d->boot1, b1, 16 * 512); 513#elif defined(__ia64__) 514 /* nothing */ 515#else 516/* Should be: #error "Set_Boot_Blocks: unknown arch"; */ 517#endif 518 return 0; 519} 520 521#ifdef PC98 522const char * 523slice_type_name( int type, int subtype ) 524{ 525 526 switch (type) { 527 case whole: 528 return "whole"; 529 case fat: 530 return "fat"; 531 case freebsd: 532 switch (subtype) { 533 case 0xc494: return "freebsd"; 534 default: return "unknown"; 535 } 536 case unused: 537 return "unused"; 538 default: 539 return "unknown"; 540 } 541} 542#else /* PC98 */ 543const char * 544slice_type_name( int type, int subtype ) 545{ 546 547 switch (type) { 548 case whole: 549 return "whole"; 550 case mbr: 551 switch (subtype) { 552 case 1: return "fat (12-bit)"; 553 case 2: return "XENIX /"; 554 case 3: return "XENIX /usr"; 555 case 4: return "fat (16-bit,<=32Mb)"; 556 case 5: return "extended DOS"; 557 case 6: return "fat (16-bit,>32Mb)"; 558 case 7: return "NTFS/HPFS/QNX"; 559 case 8: return "AIX bootable"; 560 case 9: return "AIX data"; 561 case 10: return "OS/2 bootmgr"; 562 case 11: return "fat (32-bit)"; 563 case 12: return "fat (32-bit,LBA)"; 564 case 14: return "fat (16-bit,>32Mb,LBA)"; 565 case 15: return "extended DOS, LBA"; 566 case 18: return "Compaq Diagnostic"; 567 case 84: return "OnTrack diskmgr"; 568 case 100: return "Netware 2.x"; 569 case 101: return "Netware 3.x"; 570 case 115: return "SCO UnixWare"; 571 case 128: return "Minix 1.1"; 572 case 129: return "Minix 1.5"; 573 case 130: return "linux_swap"; 574 case 131: return "ext2fs"; 575 case 166: return "OpenBSD FFS"; /* 0xA6 */ 576 case 169: return "NetBSD FFS"; /* 0xA9 */ 577 case 182: return "OpenBSD"; /* dedicated */ 578 case 183: return "bsd/os"; 579 case 184: return "bsd/os swap"; 580 case 238: return "EFI GPT"; 581 case 239: return "EFI Sys. Part."; 582 default: return "unknown"; 583 } 584 case fat: 585 return "fat"; 586 case freebsd: 587 switch (subtype) { 588 case 165: return "freebsd"; 589 default: return "unknown"; 590 } 591 case extended: 592 return "extended"; 593 case part: 594 return "part"; 595 case efi: 596 return "efi"; 597 case unused: 598 return "unused"; 599 default: 600 return "unknown"; 601 } 602} 603#endif /* PC98 */ 604