disk.c revision 46455
1/* 2 * ---------------------------------------------------------------------------- 3 * "THE BEER-WARE LICENSE" (Revision 42): 4 * <phk@login.dknet.dk> 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 * $Id: disk.c,v 1.41 1999/04/25 22:29:26 imp Exp $ 10 * 11 */ 12 13#include <stdio.h> 14#include <stdlib.h> 15#include <unistd.h> 16#include <fcntl.h> 17#include <string.h> 18#include <err.h> 19#include <sys/types.h> 20#include <sys/stat.h> 21#include <sys/ioctl.h> 22#include <sys/disklabel.h> 23#include <sys/diskslice.h> 24#include "libdisk.h" 25 26#define DOSPTYP_EXTENDED 5 27#define DOSPTYP_ONTRACK 84 28 29const char *chunk_n[] = { 30 "whole", 31 "unknown", 32 "fat", 33 "freebsd", 34 "extended", 35 "part", 36 "unused", 37 NULL 38}; 39 40struct disk * 41Open_Disk(const char *name) 42{ 43 return Int_Open_Disk(name,0); 44} 45 46static u_int32_t 47Read_Int32(u_int32_t *p) 48{ 49 u_int8_t *bp = (u_int8_t *)p; 50 return bp[0] | (bp[1] << 8) | (bp[2] << 16) | (bp[3] << 24); 51} 52 53struct disk * 54Int_Open_Disk(const char *name, u_long size) 55{ 56 int i,fd; 57 struct diskslices ds; 58 struct disklabel dl; 59 char device[64]; 60 struct disk *d; 61 struct dos_partition *dp; 62 void *p; 63 u_long offset = 0; 64 65 strcpy(device,"/dev/r"); 66 strcat(device,name); 67 68 d = (struct disk *)malloc(sizeof *d); 69 if(!d) err(1,"malloc failed"); 70 memset(d,0,sizeof *d); 71 72 fd = open(device,O_RDONLY); 73 if (fd < 0) { 74#ifdef DEBUG 75 warn("open(%s) failed",device); 76#endif 77 return 0; 78 } 79 80 memset(&dl,0,sizeof dl); 81 ioctl(fd,DIOCGDINFO,&dl); 82 i = ioctl(fd,DIOCGSLICEINFO,&ds); 83 if (i < 0) { 84#ifdef DEBUG 85 warn("DIOCGSLICEINFO(%s) failed",device); 86#endif 87 close(fd); 88 return 0; 89 } 90 91#ifdef DEBUG 92 for(i=0;i<ds.dss_nslices;i++) 93 if(ds.dss_slices[i].ds_openmask) 94 printf(" open(%d)=0x%2x", 95 i,ds.dss_slices[i].ds_openmask); 96 printf("\n"); 97#endif 98 99 if (!size) 100 size = ds.dss_slices[WHOLE_DISK_SLICE].ds_size; 101 102 p = read_block(fd,0); 103 dp = (struct dos_partition*)(p+DOSPARTOFF); 104 for (i=0; i < NDOSPART; i++) { 105 if (Read_Int32(&dp->dp_start) >= size) 106 continue; 107 if (Read_Int32(&dp->dp_start) + Read_Int32(&dp->dp_size) >= size) 108 continue; 109 if (!Read_Int32(&dp->dp_size)) 110 continue; 111 112 if (dp->dp_typ == DOSPTYP_ONTRACK) { 113 d->flags |= DISK_ON_TRACK; 114 offset = 63; 115 } 116 117 } 118 free(p); 119 120 d->bios_sect = dl.d_nsectors; 121 d->bios_hd = dl.d_ntracks; 122 123 d->name = strdup(name); 124 125 126 if (dl.d_ntracks && dl.d_nsectors) 127 d->bios_cyl = size/(dl.d_ntracks*dl.d_nsectors); 128 129 if (Add_Chunk(d, -offset, size, name, whole, 0, 0)) 130#ifdef DEBUG 131 warn("Failed to add 'whole' chunk"); 132#else 133 {} 134#endif 135 136#ifdef __i386__ 137 for(i=BASE_SLICE;i<ds.dss_nslices;i++) { 138 char sname[20]; 139 chunk_e ce; 140 u_long flags=0; 141 int subtype=0; 142 if (! ds.dss_slices[i].ds_size) 143 continue; 144 ds.dss_slices[i].ds_offset -= offset; 145 sprintf(sname,"%ss%d",name,i-1); 146 subtype = ds.dss_slices[i].ds_type; 147 switch (ds.dss_slices[i].ds_type) { 148 case 0xa5: 149 ce = freebsd; 150 break; 151 case 0x1: 152 case 0x6: 153 case 0x4: 154 case 0xb: 155 case 0xc: 156 case 0xe: 157 ce = fat; 158 break; 159 case DOSPTYP_EXTENDED: 160 case 0xf: 161 ce = extended; 162 break; 163 default: 164 ce = unknown; 165 break; 166 } 167 if (Add_Chunk(d, ds.dss_slices[i].ds_offset, 168 ds.dss_slices[i].ds_size, sname, ce, subtype, flags)) 169#ifdef DEBUG 170 warn("failed to add chunk for slice %d", i - 1); 171#else 172 {} 173#endif 174 175 if (ds.dss_slices[i].ds_type != 0xa5) 176 continue; 177 { 178 struct disklabel dl; 179 char pname[20]; 180 int j,k; 181 182 strcpy(pname,"/dev/r"); 183 strcat(pname,sname); 184 j = open(pname,O_RDONLY); 185 if (j < 0) { 186#ifdef DEBUG 187 warn("open(%s)",pname); 188#endif 189 continue; 190 } 191 k = ioctl(j,DIOCGDINFO,&dl); 192 if (k < 0) { 193#ifdef DEBUG 194 warn("ioctl(%s,DIOCGDINFO)",pname); 195#endif 196 close(j); 197 continue; 198 } 199 close(j); 200 201 for(j=0; j <= dl.d_npartitions; j++) { 202 if (j == RAW_PART) 203 continue; 204 if (j == 3) 205 continue; 206 if (j == dl.d_npartitions) { 207 j = 3; 208 dl.d_npartitions=0; 209 } 210 if (!dl.d_partitions[j].p_size) 211 continue; 212 if (dl.d_partitions[j].p_size + 213 dl.d_partitions[j].p_offset > 214 ds.dss_slices[i].ds_size) 215 continue; 216 sprintf(pname,"%s%c",sname,j+'a'); 217 if (Add_Chunk(d, 218 dl.d_partitions[j].p_offset + 219 ds.dss_slices[i].ds_offset, 220 dl.d_partitions[j].p_size, 221 pname,part, 222 dl.d_partitions[j].p_fstype, 223 0) && j != 3) 224#ifdef DEBUG 225 warn( 226 "Failed to add chunk for partition %c [%lu,%lu]", 227 j + 'a',dl.d_partitions[j].p_offset, 228 dl.d_partitions[j].p_size); 229#else 230 {} 231#endif 232 } 233 } 234 } 235#endif /* __i386__ */ 236#ifdef __alpha__ 237 { 238 struct disklabel dl; 239 char pname[20]; 240 int j,k; 241 242 strcpy(pname,"/dev/r"); 243 strcat(pname,name); 244 j = open(pname,O_RDONLY); 245 if (j < 0) { 246#ifdef DEBUG 247 warn("open(%s)",pname); 248#endif 249 goto nolabel; 250 } 251 k = ioctl(j,DIOCGDINFO,&dl); 252 if (k < 0) { 253#ifdef DEBUG 254 warn("ioctl(%s,DIOCGDINFO)",pname); 255#endif 256 close(j); 257 goto nolabel; 258 } 259 close(j); 260 All_FreeBSD(d, 1); 261 262 for(j=0; j <= dl.d_npartitions; j++) { 263 if (j == RAW_PART) 264 continue; 265 if (j == 3) 266 continue; 267 if (j == dl.d_npartitions) { 268 j = 3; 269 dl.d_npartitions=0; 270 } 271 if (!dl.d_partitions[j].p_size) 272 continue; 273 if (dl.d_partitions[j].p_size + 274 dl.d_partitions[j].p_offset > 275 ds.dss_slices[WHOLE_DISK_SLICE].ds_size) 276 continue; 277 sprintf(pname,"%s%c",name,j+'a'); 278 if (Add_Chunk(d, 279 dl.d_partitions[j].p_offset, 280 dl.d_partitions[j].p_size, 281 pname,part, 282 dl.d_partitions[j].p_fstype, 283 0) && j != 3) 284#ifdef DEBUG 285 warn( 286 "Failed to add chunk for partition %c [%lu,%lu]", 287 j + 'a',dl.d_partitions[j].p_offset, 288 dl.d_partitions[j].p_size); 289#else 290 {} 291#endif 292 } 293 nolabel:; 294 } 295#endif /* __alpha__ */ 296 close(fd); 297 Fixup_Names(d); 298 Bios_Limit_Chunk(d->chunks,1024*d->bios_hd*d->bios_sect); 299 return d; 300} 301 302void 303Debug_Disk(struct disk *d) 304{ 305 printf("Debug_Disk(%s)",d->name); 306 printf(" flags=%lx",d->flags); 307#if 0 308 printf(" real_geom=%lu/%lu/%lu",d->real_cyl,d->real_hd,d->real_sect); 309#endif 310 printf(" bios_geom=%lu/%lu/%lu = %lu\n", 311 d->bios_cyl,d->bios_hd,d->bios_sect, 312 d->bios_cyl*d->bios_hd*d->bios_sect); 313#if defined(__i386__) 314 printf(" boot1=%p, boot2=%p, bootmgr=%p\n", 315 d->boot1,d->boot2,d->bootmgr); 316#elif defined(__alpha__) 317 printf(" boot1=%p, bootmgr=%p\n", 318 d->boot1,d->bootmgr); 319#endif 320 Debug_Chunk(d->chunks); 321} 322 323void 324Free_Disk(struct disk *d) 325{ 326 if(d->chunks) Free_Chunk(d->chunks); 327 if(d->name) free(d->name); 328 if(d->bootmgr) free(d->bootmgr); 329 if(d->boot1) free(d->boot1); 330#if defined(__i386__) 331 if(d->boot2) free(d->boot2); 332#endif 333 free(d); 334} 335 336struct disk * 337Clone_Disk(struct disk *d) 338{ 339 struct disk *d2; 340 341 d2 = (struct disk*) malloc(sizeof *d2); 342 if(!d2) err(1,"malloc failed"); 343 *d2 = *d; 344 d2->name = strdup(d2->name); 345 d2->chunks = Clone_Chunk(d2->chunks); 346 if(d2->bootmgr) { 347 d2->bootmgr = malloc(DOSPARTOFF); 348 memcpy(d2->bootmgr,d->bootmgr,DOSPARTOFF); 349 } 350#if defined(__i386__) 351 if(d2->boot1) { 352 d2->boot1 = malloc(512); 353 memcpy(d2->boot1,d->boot1,512); 354 } 355 if(d2->boot2) { 356 d2->boot2 = malloc(512*15); 357 memcpy(d2->boot2,d->boot2,512*15); 358 } 359#elif defined(__alpha__) 360 if(d2->boot1) { 361 d2->boot1 = malloc(512*15); 362 memcpy(d2->boot1,d->boot1,512*15); 363 } 364#endif 365 return d2; 366} 367 368#if 0 369void 370Collapse_Disk(struct disk *d) 371{ 372 373 while(Collapse_Chunk(d,d->chunks)) 374 ; 375} 376#endif 377 378static char * device_list[] = {"wd", "ad", "sd", "da", "wfd", "fla", 0}; 379 380char ** 381Disk_Names() 382{ 383 int i,j,k; 384 char disk[25]; 385 char diskname[25]; 386 struct stat st; 387 struct diskslices ds; 388 int fd; 389 static char **disks; 390 391 disks = malloc(sizeof *disks * (1 + MAX_NO_DISKS)); 392 memset(disks,0,sizeof *disks * (1 + MAX_NO_DISKS)); 393 k = 0; 394 for (j = 0; device_list[j]; j++) { 395 for (i = 0; i < MAX_NO_DISKS; i++) { 396 sprintf(diskname, "%s%d", device_list[j], i); 397 sprintf(disk, "/dev/r%s", diskname); 398 if (stat(disk, &st) || !(st.st_mode & S_IFCHR)) 399 continue; 400 if ((fd = open(disk, O_RDWR)) == -1) 401 continue; 402 if (ioctl(fd, DIOCGSLICEINFO, &ds) == -1) { 403 close(fd); 404 continue; 405 } 406 disks[k++] = strdup(diskname); 407 if(k == MAX_NO_DISKS) 408 return disks; 409 } 410 } 411 return disks; 412} 413 414void 415Set_Boot_Mgr(struct disk *d, const u_char *b) 416{ 417 if (d->bootmgr) 418 free(d->bootmgr); 419 if (!b) { 420 d->bootmgr = 0; 421 } else { 422 d->bootmgr = malloc(DOSPARTOFF); 423 if(!d->bootmgr) err(1,"malloc failed"); 424 memcpy(d->bootmgr,b,DOSPARTOFF); 425 } 426} 427 428void 429Set_Boot_Blocks(struct disk *d, const u_char *b1, const u_char *b2) 430{ 431#if defined(__i386__) 432 if (d->boot1) free(d->boot1); 433 d->boot1 = malloc(512); 434 if(!d->boot1) err(1,"malloc failed"); 435 memcpy(d->boot1,b1,512); 436 if (d->boot2) free(d->boot2); 437 d->boot2 = malloc(15*512); 438 if(!d->boot2) err(1,"malloc failed"); 439 memcpy(d->boot2,b2,15*512); 440#elif defined(__alpha__) 441 if (d->boot1) free(d->boot1); 442 d->boot1 = malloc(15*512); 443 if(!d->boot1) err(1,"malloc failed"); 444 memcpy(d->boot1,b1,15*512); 445#endif 446} 447 448const char * 449slice_type_name( int type, int subtype ) 450{ 451 switch (type) { 452 case 0: return "whole"; 453 case 1: switch (subtype) { 454 case 1: return "fat (12-bit)"; 455 case 2: return "XENIX /"; 456 case 3: return "XENIX /usr"; 457 case 4: return "fat (16-bit,<=32Mb)"; 458 case 5: return "extended DOS"; 459 case 6: return "fat (16-bit,>32Mb)"; 460 case 7: return "NTFS/HPFS/QNX"; 461 case 8: return "AIX bootable"; 462 case 9: return "AIX data"; 463 case 10: return "OS/2 bootmgr"; 464 case 11: return "fat (32-bit)"; 465 case 12: return "fat (32-bit,LBA)"; 466 case 14: return "fat (16-bit,>32Mb,LBA)"; 467 case 15: return "extended DOS, LBA"; 468 case 18: return "Compaq Diagnostic"; 469 case 84: return "OnTrack diskmgr"; 470 case 100: return "Netware 2.x"; 471 case 101: return "Netware 3.x"; 472 case 115: return "SCO UnixWare"; 473 case 128: return "Minix 1.1"; 474 case 129: return "Minix 1.5"; 475 case 130: return "linux_swap"; 476 case 131: return "ext2fs"; 477 case 166: return "OpenBSD FFS"; /* 0xA6 */ 478 case 169: return "NetBSD FFS"; /* 0xA9 */ 479 case 182: return "OpenBSD"; /* dedicated */ 480 case 183: return "bsd/os"; 481 case 184: return "bsd/os swap"; 482 default: return "unknown"; 483 } 484 case 2: return "fat"; 485 case 3: switch (subtype) { 486 case 165: return "freebsd"; 487 default: return "unknown"; 488 } 489 case 4: return "extended"; 490 case 5: return "part"; 491 case 6: return "unused"; 492 default: return "unknown"; 493 } 494} 495