disk.c revision 32558
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 1.27 1997/02/22 15:06:32 peter 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 46struct disk * 47Int_Open_Disk(const char *name, u_long size) 48{ 49 int i,fd; 50 struct diskslices ds; 51 struct disklabel dl; 52 char device[64]; 53 struct disk *d; 54 struct dos_partition *dp; 55 void *p; 56 u_long offset = 0; 57 58 strcpy(device,"/dev/r"); 59 strcat(device,name); 60 61 d = (struct disk *)malloc(sizeof *d); 62 if(!d) err(1,"malloc failed"); 63 memset(d,0,sizeof *d); 64 65 fd = open(device,O_RDONLY); 66 if (fd < 0) { 67#ifdef DEBUG 68 warn("open(%s) failed",device); 69#endif 70 return 0; 71 } 72 73 memset(&dl,0,sizeof dl); 74 ioctl(fd,DIOCGDINFO,&dl); 75 i = ioctl(fd,DIOCGSLICEINFO,&ds); 76 if (i < 0) { 77#ifdef DEBUG 78 warn("DIOCGSLICEINFO(%s) failed",device); 79#endif 80 close(fd); 81 return 0; 82 } 83 84#ifdef DEBUG 85 for(i=0;i<ds.dss_nslices;i++) 86 if(ds.dss_slices[i].ds_openmask) 87 printf(" open(%d)=0x%2x", 88 i,ds.dss_slices[i].ds_openmask); 89 printf("\n"); 90#endif 91 92 if (!size) 93 size = ds.dss_slices[WHOLE_DISK_SLICE].ds_size; 94 95 p = read_block(fd,0); 96 dp = (struct dos_partition*)(p+DOSPARTOFF); 97 for(i=0;i<NDOSPART;i++) { 98 if (dp->dp_start >= size) continue; 99 if (dp->dp_start+dp->dp_size >= size) continue; 100 if (!dp->dp_size) continue; 101 102 if (dp->dp_typ == DOSPTYP_ONTRACK) { 103 d->flags |= DISK_ON_TRACK; 104 offset = 63; 105 } 106 107 } 108 free(p); 109 110 d->bios_sect = dl.d_nsectors; 111 d->bios_hd = dl.d_ntracks; 112 113 d->name = strdup(name); 114 115 116 if (dl.d_ntracks && dl.d_nsectors) 117 d->bios_cyl = size/(dl.d_ntracks*dl.d_nsectors); 118 119 if (Add_Chunk(d, -offset, size, name, whole, 0, 0)) 120#ifdef DEBUG 121 warn("Failed to add 'whole' chunk"); 122#else 123 {} 124#endif 125 126 for(i=BASE_SLICE;i<ds.dss_nslices;i++) { 127 char sname[20]; 128 chunk_e ce; 129 u_long flags=0; 130 int subtype=0; 131 if (! ds.dss_slices[i].ds_size) 132 continue; 133 ds.dss_slices[i].ds_offset -= offset; 134 sprintf(sname,"%ss%d",name,i-1); 135 subtype = ds.dss_slices[i].ds_type; 136 switch (ds.dss_slices[i].ds_type) { 137 case 0xa5: 138 ce = freebsd; 139 break; 140 case 0x1: 141 case 0x6: 142 case 0x4: 143 ce = fat; 144 break; 145 case DOSPTYP_EXTENDED: 146 ce = extended; 147 break; 148 default: 149 ce = unknown; 150 break; 151 } 152 if (Add_Chunk(d, ds.dss_slices[i].ds_offset, 153 ds.dss_slices[i].ds_size, sname, ce, subtype, flags)) 154#ifdef DEBUG 155 warn("failed to add chunk for slice %d", i - 1); 156#else 157 {} 158#endif 159 160 if (ds.dss_slices[i].ds_type != 0xa5) 161 continue; 162 { 163 struct disklabel dl; 164 char pname[20]; 165 int j,k; 166 167 strcpy(pname,"/dev/r"); 168 strcat(pname,sname); 169 j = open(pname,O_RDONLY); 170 if (j < 0) { 171#ifdef DEBUG 172 warn("open(%s)",pname); 173#endif 174 continue; 175 } 176 k = ioctl(j,DIOCGDINFO,&dl); 177 if (k < 0) { 178#ifdef DEBUG 179 warn("ioctl(%s,DIOCGDINFO)",pname); 180#endif 181 close(j); 182 continue; 183 } 184 close(j); 185 186 for(j=0; j <= dl.d_npartitions; j++) { 187 if (j == RAW_PART) 188 continue; 189 if (j == 3) 190 continue; 191 if (j == dl.d_npartitions) { 192 j = 3; 193 dl.d_npartitions=0; 194 } 195 if (!dl.d_partitions[j].p_size) 196 continue; 197 if (dl.d_partitions[j].p_size + 198 dl.d_partitions[j].p_offset > 199 ds.dss_slices[i].ds_size) 200 continue; 201 sprintf(pname,"%s%c",sname,j+'a'); 202 if (Add_Chunk(d, 203 dl.d_partitions[j].p_offset + 204 ds.dss_slices[i].ds_offset, 205 dl.d_partitions[j].p_size, 206 pname,part, 207 dl.d_partitions[j].p_fstype, 208 0) && j != 3) 209#ifdef DEBUG 210 warn( 211 "Failed to add chunk for partition %c [%lu,%lu]", 212 j + 'a',dl.d_partitions[j].p_offset, 213 dl.d_partitions[j].p_size); 214#else 215 {} 216#endif 217 } 218 } 219 } 220 close(fd); 221 Fixup_Names(d); 222 Bios_Limit_Chunk(d->chunks,1024*d->bios_hd*d->bios_sect); 223 return d; 224} 225 226void 227Debug_Disk(struct disk *d) 228{ 229 printf("Debug_Disk(%s)",d->name); 230 printf(" flags=%lx",d->flags); 231#if 0 232 printf(" real_geom=%lu/%lu/%lu",d->real_cyl,d->real_hd,d->real_sect); 233#endif 234 printf(" bios_geom=%lu/%lu/%lu = %lu\n", 235 d->bios_cyl,d->bios_hd,d->bios_sect, 236 d->bios_cyl*d->bios_hd*d->bios_sect); 237 printf(" boot1=%p, boot2=%p, bootmgr=%p\n", 238 d->boot1,d->boot2,d->bootmgr); 239 Debug_Chunk(d->chunks); 240} 241 242void 243Free_Disk(struct disk *d) 244{ 245 if(d->chunks) Free_Chunk(d->chunks); 246 if(d->name) free(d->name); 247 if(d->bootmgr) free(d->bootmgr); 248 if(d->boot1) free(d->boot1); 249 if(d->boot2) free(d->boot2); 250 free(d); 251} 252 253struct disk * 254Clone_Disk(struct disk *d) 255{ 256 struct disk *d2; 257 258 d2 = (struct disk*) malloc(sizeof *d2); 259 if(!d2) err(1,"malloc failed"); 260 *d2 = *d; 261 d2->name = strdup(d2->name); 262 d2->chunks = Clone_Chunk(d2->chunks); 263 if(d2->bootmgr) { 264 d2->bootmgr = malloc(DOSPARTOFF); 265 memcpy(d2->bootmgr,d->bootmgr,DOSPARTOFF); 266 } 267 if(d2->boot1) { 268 d2->boot1 = malloc(512); 269 memcpy(d2->boot1,d->boot1,512); 270 } 271 if(d2->boot2) { 272 d2->boot2 = malloc(512*15); 273 memcpy(d2->boot2,d->boot2,512*15); 274 } 275 return d2; 276} 277 278#if 0 279void 280Collapse_Disk(struct disk *d) 281{ 282 283 while(Collapse_Chunk(d,d->chunks)) 284 ; 285} 286#endif 287 288static char * device_list[] = {"wd","sd","da","od",0}; 289 290char ** 291Disk_Names() 292{ 293 int i,j,k; 294 char disk[25]; 295 char diskname[25]; 296 struct stat st; 297 struct diskslices ds; 298 int fd; 299 static char **disks; 300 301 disks = malloc(sizeof *disks * (1 + MAX_NO_DISKS)); 302 memset(disks,0,sizeof *disks * (1 + MAX_NO_DISKS)); 303 k = 0; 304 for (j = 0; device_list[j]; j++) { 305 for (i = 0; i < 10; i++) { 306 sprintf(diskname, "%s%d", device_list[j], i); 307 sprintf(disk, "/dev/r%s", diskname); 308 if (stat(disk, &st) || !(st.st_mode & S_IFCHR)) 309 continue; 310 if ((fd = open(disk, O_RDWR)) == -1) 311 continue; 312 if (ioctl(fd, DIOCGSLICEINFO, &ds) == -1) { 313 close(fd); 314 continue; 315 } 316 disks[k++] = strdup(diskname); 317 if(k == MAX_NO_DISKS) 318 return disks; 319 } 320 } 321 return disks; 322} 323 324void 325Set_Boot_Mgr(struct disk *d, const u_char *b) 326{ 327 if (d->bootmgr) 328 free(d->bootmgr); 329 if (!b) { 330 d->bootmgr = 0; 331 } else { 332 d->bootmgr = malloc(DOSPARTOFF); 333 if(!d->bootmgr) err(1,"malloc failed"); 334 memcpy(d->bootmgr,b,DOSPARTOFF); 335 } 336} 337 338void 339Set_Boot_Blocks(struct disk *d, const u_char *b1, const u_char *b2) 340{ 341 if (d->boot1) free(d->boot1); 342 d->boot1 = malloc(512); 343 if(!d->boot1) err(1,"malloc failed"); 344 memcpy(d->boot1,b1,512); 345 if (d->boot2) free(d->boot2); 346 d->boot2 = malloc(15*512); 347 if(!d->boot2) err(1,"malloc failed"); 348 memcpy(d->boot2,b2,15*512); 349} 350 351const char * 352slice_type_name( int type, int subtype ) 353{ 354 switch (type) { 355 case 0: return "whole"; 356 case 1: switch (subtype) { 357 case 1: return "fat (12-bit)"; 358 case 2: return "XENIX /"; 359 case 3: return "XENIX /usr"; 360 case 4: return "fat (16-bit)"; 361 case 5: return "extended DOS"; 362 case 6: return "fat (>32Mb)"; 363 case 7: return "NTFS/HPFS"; 364 case 10: return "OS/2 bootmgr"; 365 case 84: return "OnTrack diskmgr"; 366 case 100: return "Netware 2.x"; 367 case 101: return "Netware 3.x"; 368 case 128: return "Minix 1.1"; 369 case 129: return "Minix 1.5"; 370 case 130: return "linux_swap"; 371 case 131: return "ext2fs"; 372 case 183: return "bsd/os"; 373 case 184: return "bsd/os swap"; 374 default: return "unknown"; 375 } 376 case 2: return "fat"; 377 case 3: switch (subtype) { 378 case 165: return "freebsd"; 379 default: return "unknown"; 380 } 381 case 4: return "extended"; 382 case 5: return "part"; 383 case 6: return "unused"; 384 default: return "unknown"; 385 } 386} 387