diskpart.c revision 1.12
1 /* 2 * Copyright (c) 1983, 1988, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 */ 33 34 #include <sys/cdefs.h> 35 #ifndef lint 36 __COPYRIGHT("@(#) Copyright (c) 1983, 1988, 1993\n\ 37 The Regents of the University of California. All rights reserved.\n"); 38 #endif /* not lint */ 39 40 #ifndef lint 41 #if 0 42 static char sccsid[] = "from: @(#)diskpart.c 8.3 (Berkeley) 11/30/94"; 43 #else 44 __RCSID("$NetBSD: diskpart.c,v 1.12 2002/05/27 16:39:29 drochner Exp $"); 45 #endif 46 #endif /* not lint */ 47 48 /* 49 * Program to calculate standard disk partition sizes. 50 */ 51 #include <sys/param.h> 52 #define DKTYPENAMES 53 #include <sys/disklabel.h> 54 55 #include <ctype.h> 56 #include <disktab.h> 57 #include <limits.h> 58 #include <stdio.h> 59 #include <stdlib.h> 60 #include <string.h> 61 #include <unistd.h> 62 63 #define for_now /* show all of `c' partition for disklabel */ 64 #define NPARTITIONS 8 65 #define PART(x) (x - 'a') 66 67 /* 68 * Default partition sizes, where they exist. 69 */ 70 #define NDEFAULTS 4 71 int defpart[NDEFAULTS][NPARTITIONS] = { 72 { 15884, 66880, 0, 15884, 307200, 0, 0, 291346 }, /* ~ 356+ Mbytes */ 73 { 15884, 33440, 0, 15884, 55936, 0, 0, 291346 }, /* ~ 206-355 Mbytes */ 74 { 15884, 33440, 0, 15884, 55936, 0, 0, 0 }, /* ~ 61-205 Mbytes */ 75 { 15884, 10032, 0, 15884, 0, 0, 0, 0 }, /* ~ 20-60 Mbytes */ 76 }; 77 78 /* 79 * Each array defines a layout for a disk; 80 * that is, the collection of partitions totally 81 * covers the physical space on a disk. 82 */ 83 #define NLAYOUTS 3 84 char layouts[NLAYOUTS][NPARTITIONS] = { 85 { 'a', 'b', 'h', 'g' }, 86 { 'a', 'b', 'h', 'd', 'e', 'f' }, 87 { 'c' }, 88 }; 89 90 /* 91 * Default disk block and disk block fragment 92 * sizes for each file system. Those file systems 93 * with zero block and frag sizes are special cases 94 * (e.g. swap areas or for access to the entire device). 95 */ 96 struct partition defparam[NPARTITIONS] = { 97 { 0, 0, { 1024 }, FS_UNUSED, 8, { 0 }, }, /* a */ 98 { 0, 0, { 1024 }, FS_SWAP, 8, { 0 }, }, /* b */ 99 { 0, 0, { 1024 }, FS_UNUSED, 8, { 0 }, }, /* c */ 100 { 0, 0, { 512 }, FS_UNUSED, 8, { 0 }, }, /* d */ 101 { 0, 0, { 1024 }, FS_UNUSED, 8, { 0 }, }, /* e */ 102 { 0, 0, { 1024 }, FS_UNUSED, 8, { 0 }, }, /* f */ 103 { 0, 0, { 1024 }, FS_UNUSED, 8, { 0 }, }, /* g */ 104 { 0, 0, { 1024 }, FS_UNUSED, 8, { 0 }, } /* h */ 105 }; 106 107 /* 108 * Each disk has some space reserved for a bad sector 109 * forwarding table. DEC standard 144 uses the first 110 * 5 even numbered sectors in the last track of the 111 * last cylinder for replicated storage of the bad sector 112 * table; another 126 sectors past this is needed as a 113 * pool of replacement sectors. 114 */ 115 int badsecttable = 126; /* # sectors */ 116 117 int pflag; /* print device driver partition tables */ 118 int dflag; /* print disktab entry */ 119 120 int gettype __P((const char *, const char *const *)); 121 int main __P((int, char **)); 122 struct disklabel *promptfordisk __P((const char *)); 123 void usage __P((void)); 124 125 int 126 main(argc, argv) 127 int argc; 128 char *argv[]; 129 { 130 131 struct disklabel *dp; 132 int curcyl, spc, def, part, layout, j, ch; 133 int threshhold, numcyls[NPARTITIONS], startcyl[NPARTITIONS]; 134 off_t totsize = 0; 135 char *lp, *tyname; 136 137 while ((ch = getopt(argc, argv, "pds:")) != -1) { 138 switch (ch) { 139 case 'd': 140 dflag++; 141 break; 142 143 case 'p': 144 pflag++; 145 break; 146 147 case 's': 148 totsize = strtoul(optarg, &lp, 10); 149 if (*lp != '\0') 150 usage(); 151 break; 152 153 case '?': 154 default: 155 usage(); 156 /* NOTREACHED */ 157 } 158 } 159 argc -= optind; 160 argv += optind; 161 162 if (argc != 1) { 163 usage(); 164 /* NOTREACHED */ 165 } 166 167 dp = getdiskbyname(*argv); 168 if (dp == NULL) { 169 if (isatty(0)) 170 dp = promptfordisk(*argv); 171 if (dp == NULL) { 172 fprintf(stderr, "%s: unknown disk type\n", *argv); 173 exit(1); 174 } 175 } 176 if (dp->d_flags & D_REMOVABLE) 177 tyname = "removable"; 178 else if (dp->d_flags & D_RAMDISK) 179 tyname = "simulated"; 180 else 181 tyname = "winchester"; 182 spc = dp->d_secpercyl; 183 /* 184 * Bad sector table contains one track for the replicated 185 * copies of the table and enough full tracks preceding 186 * the last track to hold the pool of free blocks to which 187 * bad sectors are mapped. 188 * If disk size was specified explicitly, use specified size. 189 */ 190 if (dp->d_type == DTYPE_SMD && dp->d_flags & D_BADSECT && 191 totsize == 0) { 192 badsecttable = dp->d_nsectors + 193 roundup(badsecttable, dp->d_nsectors); 194 threshhold = howmany(spc, badsecttable); 195 } else { 196 badsecttable = 0; 197 threshhold = 0; 198 } 199 /* 200 * If disk size was specified, recompute number of cylinders 201 * that may be used, and set badsecttable to any remaining 202 * fraction of the last cylinder. 203 */ 204 if (totsize != 0) { 205 dp->d_ncylinders = howmany(totsize, spc); 206 badsecttable = spc * dp->d_ncylinders - totsize; 207 } 208 209 /* 210 * Figure out if disk is large enough for 211 * expanded swap area and 'd', 'e', and 'f' 212 * partitions. Otherwise, use smaller defaults 213 * based on RK07. 214 */ 215 for (def = 0; def < NDEFAULTS; def++) { 216 curcyl = 0; 217 for (part = PART('a'); part < NPARTITIONS; part++) 218 curcyl += howmany(defpart[def][part], spc); 219 if (curcyl < dp->d_ncylinders - threshhold) 220 break; 221 } 222 if (def >= NDEFAULTS) { 223 fprintf(stderr, "%s: disk too small, calculate by hand\n", 224 *argv); 225 exit(1); 226 } 227 228 /* 229 * Calculate number of cylinders allocated to each disk 230 * partition. We may waste a bit of space here, but it's 231 * in the interest of (very backward) compatibility 232 * (for mixed disk systems). 233 */ 234 for (curcyl = 0, part = PART('a'); part < NPARTITIONS; part++) { 235 numcyls[part] = 0; 236 if (defpart[def][part] != 0) { 237 numcyls[part] = howmany(defpart[def][part], spc); 238 curcyl += numcyls[part]; 239 } 240 } 241 numcyls[PART('f')] = dp->d_ncylinders - curcyl; 242 numcyls[PART('g')] = 243 numcyls[PART('d')] + numcyls[PART('e')] + numcyls[PART('f')]; 244 numcyls[PART('c')] = dp->d_ncylinders; 245 defpart[def][PART('f')] = numcyls[PART('f')] * spc - badsecttable; 246 defpart[def][PART('g')] = numcyls[PART('g')] * spc - badsecttable; 247 defpart[def][PART('c')] = numcyls[PART('c')] * spc; 248 #ifndef for_now 249 if (totsize || !pflag) 250 #else 251 if (totsize) 252 #endif 253 defpart[def][PART('c')] -= badsecttable; 254 255 /* 256 * Calculate starting cylinder number for each partition. 257 * Note the 'h' partition is physically located before the 258 * 'g' or 'd' partition. This is reflected in the layout 259 * arrays defined above. 260 */ 261 for (layout = 0; layout < NLAYOUTS; layout++) { 262 curcyl = 0; 263 for (lp = layouts[layout]; *lp != 0; lp++) { 264 startcyl[PART(*lp)] = curcyl; 265 curcyl += numcyls[PART(*lp)]; 266 } 267 } 268 269 if (pflag) { 270 printf("}, %s_sizes[%d] = {\n", dp->d_typename, NPARTITIONS); 271 for (part = PART('a'); part < NPARTITIONS; part++) { 272 if (numcyls[part] == 0) { 273 printf("\t0,\t0,\n"); 274 continue; 275 } 276 if (dp->d_type != DTYPE_MSCP) { 277 printf("\t%d,\t%d,\t\t/* %c=cyl %d thru %d */\n", 278 defpart[def][part], startcyl[part], 279 'A' + part, startcyl[part], 280 startcyl[part] + numcyls[part] - 1); 281 continue; 282 } 283 printf("\t%d,\t%d,\t\t/* %c=sectors %d thru %d */\n", 284 defpart[def][part], spc * startcyl[part], 285 'A' + part, spc * startcyl[part], 286 spc * startcyl[part] + defpart[def][part] - 1); 287 } 288 exit(0); 289 } 290 if (dflag) { 291 int nparts; 292 293 /* 294 * In case the disk is in the ``in-between'' range 295 * where the 'g' partition is smaller than the 'h' 296 * partition, reverse the frag sizes so the /usr partition 297 * is always set up with a frag size larger than the 298 * user's partition. 299 */ 300 if (defpart[def][PART('g')] < defpart[def][PART('h')]) { 301 int temp; 302 303 temp = defparam[PART('h')].p_fsize; 304 defparam[PART('h')].p_fsize = 305 defparam[PART('g')].p_fsize; 306 defparam[PART('g')].p_fsize = temp; 307 } 308 printf("%s:\\\n", dp->d_typename); 309 printf("\t:ty=%s:ns#%d:nt#%d:nc#%d:", tyname, 310 dp->d_nsectors, dp->d_ntracks, dp->d_ncylinders); 311 if (dp->d_secpercyl != dp->d_nsectors * dp->d_ntracks) 312 printf("sc#%d:", dp->d_secpercyl); 313 if (dp->d_type == DTYPE_SMD && dp->d_flags & D_BADSECT) 314 printf("sf:"); 315 printf("\\\n\t:dt=%s:", dktypenames[dp->d_type]); 316 for (part = NDDATA - 1; part >= 0; part--) 317 if (dp->d_drivedata[part]) 318 break; 319 for (j = 0; j <= part; j++) 320 printf("d%d#%d:", j, dp->d_drivedata[j]); 321 printf("\\\n"); 322 for (nparts = 0, part = PART('a'); part < NPARTITIONS; part++) 323 if (defpart[def][part] != 0) 324 nparts++; 325 for (part = PART('a'); part < NPARTITIONS; part++) { 326 if (defpart[def][part] == 0) 327 continue; 328 printf("\t:p%c#%d:", 'a' + part, defpart[def][part]); 329 printf("o%c#%d:b%c#%d:f%c#%d:", 330 'a' + part, spc * startcyl[part], 331 'a' + part, 332 defparam[part].p_frag * defparam[part].p_fsize, 333 'a' + part, defparam[part].p_fsize); 334 if (defparam[part].p_fstype == FS_SWAP) 335 printf("t%c=swap:", 'a' + part); 336 nparts--; 337 printf("%s\n", nparts > 0 ? "\\" : ""); 338 } 339 #ifdef for_now 340 defpart[def][PART('c')] -= badsecttable; 341 part = PART('c'); 342 printf("#\t:p%c#%d:", 'a' + part, defpart[def][part]); 343 printf("o%c#%d:b%c#%d:f%c#%d:\n", 344 'a' + part, spc * startcyl[part], 345 'a' + part, 346 defparam[part].p_frag * defparam[part].p_fsize, 347 'a' + part, defparam[part].p_fsize); 348 #endif 349 exit(0); 350 } 351 printf("%s: #sectors/track=%d, #tracks/cylinder=%d #cylinders=%d\n", 352 dp->d_typename, dp->d_nsectors, dp->d_ntracks, 353 dp->d_ncylinders); 354 printf("\n Partition\t Size\t Offset\t Range\n"); 355 for (part = PART('a'); part < NPARTITIONS; part++) { 356 printf("\t%c\t", 'a' + part); 357 if (numcyls[part] == 0) { 358 printf(" unused\n"); 359 continue; 360 } 361 printf("%7d\t%7d\t%4d - %d%s\n", 362 defpart[def][part], startcyl[part] * spc, 363 startcyl[part], startcyl[part] + numcyls[part] - 1, 364 defpart[def][part] % spc ? "*" : ""); 365 } 366 exit(0); 367 } 368 369 struct disklabel disk; 370 371 struct field { 372 char *f_name; 373 char *f_defaults; 374 u_int32_t *f_location; 375 } fields[] = { 376 { "sector size", "512", &disk.d_secsize }, 377 { "#sectors/track", 0, &disk.d_nsectors }, 378 { "#tracks/cylinder", 0, &disk.d_ntracks }, 379 { "#cylinders", 0, &disk.d_ncylinders }, 380 { 0, 0, 0 }, 381 }; 382 383 struct disklabel * 384 promptfordisk(name) 385 const char *name; 386 { 387 struct disklabel *dp = &disk; 388 struct field *fp; 389 int i; 390 const char *const *tp; 391 char buf[BUFSIZ], *cp; 392 393 strncpy(dp->d_typename, name, sizeof(dp->d_typename)); 394 fprintf(stderr, 395 "%s: unknown disk type, want to supply parameters (y/n)? ", 396 name); 397 if ((fgets(buf, BUFSIZ, stdin) == NULL) || buf[0] != 'y') 398 return ((struct disklabel *)0); 399 for (;;) { 400 fprintf(stderr, "Disk/controller type (%s)? ", dktypenames[1]); 401 if (fgets(buf, BUFSIZ, stdin) == NULL) 402 return ((struct disklabel *)0); 403 if ((cp = strchr(buf, '\n')) != NULL) 404 *cp = '\0'; 405 if (buf[0] == '\0') { 406 dp->d_type = 1; 407 break; 408 } 409 if ((i = gettype(buf, dktypenames)) >= 0) { 410 dp->d_type = i; 411 break; 412 } 413 fprintf(stderr, "%s: unrecognized controller type\n", buf); 414 fprintf(stderr, "use one of:\n"); 415 for (tp = dktypenames; *tp; tp++) 416 if (strchr(*tp, ' ') == 0) 417 fprintf(stderr, "\t%s\n", *tp); 418 } 419 gettype: 420 dp->d_flags = 0; 421 fprintf(stderr, "type (winchester|removable|simulated)? "); 422 if (fgets(buf, BUFSIZ, stdin) == NULL) 423 return ((struct disklabel *)0); 424 if ((cp = strchr(buf, '\n')) != NULL) 425 *cp = '\0'; 426 if (buf[0] == '\0') 427 goto gettype; 428 switch (buf[0]) { 429 case 'r': 430 dp->d_flags = D_REMOVABLE; 431 break; 432 case 's': 433 dp->d_flags = D_RAMDISK; 434 break; 435 case 'w': 436 break; 437 default: 438 fprintf(stderr, "%s: bad disk type\n", buf); 439 /* FALLTHROUGH */ 440 case '\0': 441 goto gettype; 442 } 443 fprintf(stderr, "(type <cr> to get default value, if only one)\n"); 444 if (dp->d_type == DTYPE_SMD) { 445 fprintf(stderr, 446 "Do '%s' disks support bad144 bad block forwarding (yes)? ", 447 dp->d_typename); 448 if (fgets(buf, BUFSIZ, stdin) == NULL) 449 return ((struct disklabel *)0); 450 if (buf[0] != 'n') 451 dp->d_flags |= D_BADSECT; 452 } 453 for (fp = fields; fp->f_name != NULL; fp++) { 454 again: 455 fprintf(stderr, "%s ", fp->f_name); 456 if (fp->f_defaults != NULL) 457 fprintf(stderr, "(%s)", fp->f_defaults); 458 fprintf(stderr, "? "); 459 if (fgets(buf, BUFSIZ, stdin) == NULL) 460 return ((struct disklabel *)0); 461 if ((cp = strchr(buf, '\n')) != NULL) 462 *cp = '\0'; 463 cp = buf; 464 if (*cp == '\0') { 465 if (fp->f_defaults == NULL) { 466 fprintf(stderr, "no default value\n"); 467 goto again; 468 } 469 cp = fp->f_defaults; 470 } 471 *fp->f_location = atol(cp); 472 if (*fp->f_location == 0) { 473 fprintf(stderr, "%s: bad value\n", cp); 474 goto again; 475 } 476 } 477 fprintf(stderr, "sectors/cylinder (%d)? ", 478 dp->d_nsectors * dp->d_ntracks); 479 if (fgets(buf, BUFSIZ, stdin) == NULL) 480 return ((struct disklabel *)0); 481 if ((cp = strchr(buf, '\n')) != NULL) 482 *cp = '\0'; 483 if (buf[0] == 0) 484 dp->d_secpercyl = dp->d_nsectors * dp->d_ntracks; 485 else 486 dp->d_secpercyl = atol(buf); 487 fprintf(stderr, "Drive-type-specific parameters, <cr> to terminate:\n"); 488 for (i = 0; i < NDDATA; i++) { 489 fprintf(stderr, "d%d? ", i); 490 if (fgets(buf, BUFSIZ, stdin) == NULL) 491 return ((struct disklabel *)0); 492 if ((cp = strchr(buf, '\n')) != NULL) 493 *cp = '\0'; 494 if (buf[0] == 0) 495 break; 496 dp->d_drivedata[i] = atol(buf); 497 } 498 return (dp); 499 } 500 501 int 502 gettype(t, names) 503 const char *t; 504 const char *const *names; 505 { 506 const char *const *nm; 507 508 for (nm = names; *nm; nm++) 509 if (strcasecmp(t, *nm) == 0) 510 return (nm - names); 511 if (isdigit(*t)) 512 return (atoi(t)); 513 return (-1); 514 } 515 516 void 517 usage(void) 518 { 519 (void)fprintf(stderr, "Usage: diskpart [-dp] [-s size] disk-type\n"); 520 exit(1); 521 } 522
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