newfs.c revision 1.38.8.4
1 /* $NetBSD: newfs.c,v 1.38.8.4 2001/11/25 19:57:16 he Exp $ */ 2 3 /* 4 * Copyright (c) 1983, 1989, 1993, 1994 5 * The Regents of the University of California. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by the University of 18 * California, Berkeley and its contributors. 19 * 4. Neither the name of the University nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 */ 35 36 #include <sys/cdefs.h> 37 #ifndef lint 38 __COPYRIGHT("@(#) Copyright (c) 1983, 1989, 1993, 1994\n\ 39 The Regents of the University of California. All rights reserved.\n"); 40 #endif /* not lint */ 41 42 #ifndef lint 43 #if 0 44 static char sccsid[] = "@(#)newfs.c 8.13 (Berkeley) 5/1/95"; 45 #else 46 __RCSID("$NetBSD: newfs.c,v 1.38.8.4 2001/11/25 19:57:16 he Exp $"); 47 #endif 48 #endif /* not lint */ 49 50 /* 51 * newfs: friendly front end to mkfs 52 */ 53 #include <sys/param.h> 54 #include <sys/stat.h> 55 #include <sys/ioctl.h> 56 #include <sys/disklabel.h> 57 #include <sys/file.h> 58 #include <sys/mount.h> 59 #include <sys/sysctl.h> 60 #include <sys/wait.h> 61 62 #include <ufs/ufs/dir.h> 63 #include <ufs/ufs/dinode.h> 64 #include <ufs/ufs/ufsmount.h> 65 #include <ufs/ffs/fs.h> 66 67 #include <ctype.h> 68 #include <disktab.h> 69 #include <errno.h> 70 #include <paths.h> 71 #include <stdio.h> 72 #include <stdlib.h> 73 #include <string.h> 74 #include <syslog.h> 75 #include <unistd.h> 76 #include <signal.h> 77 #include <err.h> 78 #include <util.h> 79 80 #include "mntopts.h" 81 #include "dkcksum.h" 82 #include "extern.h" 83 84 struct mntopt mopts[] = { 85 MOPT_STDOPTS, 86 MOPT_ASYNC, 87 MOPT_UPDATE, 88 MOPT_NOATIME, 89 { NULL }, 90 }; 91 92 static struct disklabel *getdisklabel(char *, int); 93 static void rewritelabel(char *, int, struct disklabel *); 94 static void usage(void); 95 int main(int, char *[]); 96 97 #define COMPAT /* allow non-labeled disks */ 98 99 /* 100 * The following two constants set the default block and fragment sizes. 101 * Both constants must be a power of 2 and meet the following constraints: 102 * MINBSIZE <= DESBLKSIZE <= MAXBSIZE 103 * sectorsize <= DESFRAGSIZE <= DESBLKSIZE 104 * DESBLKSIZE / DESFRAGSIZE <= 8 105 */ 106 #define DFL_FRAGSIZE 1024 107 #define DFL_BLKSIZE 8192 108 109 /* 110 * Cylinder groups may have up to many cylinders. The actual 111 * number used depends upon how much information can be stored 112 * on a single cylinder. The default is to use 16 cylinders 113 * per group. 114 */ 115 #define DESCPG 16 /* desired fs_cpg */ 116 117 /* 118 * ROTDELAY gives the minimum number of milliseconds to initiate 119 * another disk transfer on the same cylinder. It is used in 120 * determining the rotationally optimal layout for disk blocks 121 * within a file; the default of fs_rotdelay is 0ms. 122 */ 123 #define ROTDELAY 0 124 125 /* 126 * MAXBLKPG determines the maximum number of data blocks which are 127 * placed in a single cylinder group. The default is one indirect 128 * block worth of data blocks. 129 */ 130 #define MAXBLKPG(bsize) ((bsize) / sizeof(daddr_t)) 131 132 /* 133 * Each file system has a number of inodes statically allocated. 134 * We allocate one inode slot per NFPI fragments, expecting this 135 * to be far more than we will ever need. 136 */ 137 #define NFPI 4 138 139 /* 140 * For each cylinder we keep track of the availability of blocks at different 141 * rotational positions, so that we can lay out the data to be picked 142 * up with minimum rotational latency. NRPOS is the default number of 143 * rotational positions that we distinguish. With NRPOS of 8 the resolution 144 * of our summary information is 2ms for a typical 3600 rpm drive. Caching 145 * and zoning pretty much defeats rotational optimization, so we now use a 146 * default of 1. 147 */ 148 #define NRPOS 1 /* number distinct rotational positions */ 149 150 151 int mfs; /* run as the memory based filesystem */ 152 int Nflag; /* run without writing file system */ 153 int Oflag; /* format as an 4.3BSD file system */ 154 int fssize; /* file system size */ 155 int ntracks; /* # tracks/cylinder */ 156 int nsectors; /* # sectors/track */ 157 int nphyssectors; /* # sectors/track including spares */ 158 int secpercyl; /* sectors per cylinder */ 159 int trackspares = -1; /* spare sectors per track */ 160 int cylspares = -1; /* spare sectors per cylinder */ 161 int sectorsize; /* bytes/sector */ 162 int rpm; /* revolutions/minute of drive */ 163 int interleave; /* hardware sector interleave */ 164 int trackskew = -1; /* sector 0 skew, per track */ 165 int fsize = 0; /* fragment size */ 166 int bsize = 0; /* block size */ 167 int cpg = DESCPG; /* cylinders/cylinder group */ 168 int cpgflg; /* cylinders/cylinder group flag was given */ 169 int minfree = MINFREE; /* free space threshold */ 170 int opt = DEFAULTOPT; /* optimization preference (space or time) */ 171 int density; /* number of bytes per inode */ 172 int maxcontig = 0; /* max contiguous blocks to allocate */ 173 int rotdelay = ROTDELAY; /* rotational delay between blocks */ 174 int maxbpg; /* maximum blocks per file in a cyl group */ 175 int nrpos = NRPOS; /* # of distinguished rotational positions */ 176 int avgfilesize = AVFILESIZ;/* expected average file size */ 177 int avgfpdir = AFPDIR; /* expected number of files per directory */ 178 int bbsize = BBSIZE; /* boot block size */ 179 int sbsize = SBSIZE; /* superblock size */ 180 int mntflags = MNT_ASYNC; /* flags to be passed to mount */ 181 u_long memleft; /* virtual memory available */ 182 caddr_t membase; /* start address of memory based filesystem */ 183 int needswap =0; /* Filesystem not in native byte order */ 184 #ifdef COMPAT 185 char *disktype; 186 int unlabeled; 187 #endif 188 189 char device[MAXPATHLEN]; 190 extern char *__progname; 191 192 int 193 main(int argc, char *argv[]) 194 { 195 struct partition *pp; 196 struct disklabel *lp; 197 struct disklabel mfsfakelabel; 198 struct partition oldpartition; 199 struct stat st; 200 struct statfs *mp; 201 int ch, fsi = 0, fso, len, maxpartitions, n; 202 char *cp = NULL, *endp, *opstring, *s1, *s2, *special; 203 #ifdef MFS 204 char mountfromname[100]; 205 pid_t pid, res; 206 struct statfs sf; 207 int status; 208 #endif 209 210 if (strstr(__progname, "mfs")) { 211 mfs = 1; 212 Nflag++; 213 } 214 215 maxpartitions = getmaxpartitions(); 216 if (maxpartitions > 26) 217 errx(1, "insane maxpartitions value %d", maxpartitions); 218 219 opstring = mfs ? 220 "NT:a:b:c:d:e:f:g:h:i:m:o:s:" : 221 "B:NOS:T:a:b:c:d:e:f:g:h:i:k:l:m:n:o:p:r:s:t:u:x:"; 222 while ((ch = getopt(argc, argv, opstring)) != -1) 223 switch (ch) { 224 case 'B': 225 if (strcmp(optarg, "be") == 0) { 226 #if BYTE_ORDER == LITTLE_ENDIAN 227 needswap = 1; 228 #endif 229 } else if (strcmp(optarg, "le") == 0) { 230 #if BYTE_ORDER == BIG_ENDIAN 231 needswap = 1; 232 #endif 233 } else 234 usage(); 235 break; 236 case 'N': 237 Nflag = 1; 238 break; 239 case 'O': 240 Oflag = 1; 241 break; 242 case 'S': 243 if ((sectorsize = atoi(optarg)) <= 0) 244 errx(1, "%s: bad sector size", optarg); 245 break; 246 #ifdef COMPAT 247 case 'T': 248 disktype = optarg; 249 break; 250 #endif 251 case 'a': 252 if ((maxcontig = atoi(optarg)) <= 0) 253 errx(1, "%s: bad maximum contiguous blocks", 254 optarg); 255 break; 256 case 'b': 257 if ((bsize = atoi(optarg)) < MINBSIZE) 258 errx(1, "%s: bad block size", optarg); 259 break; 260 case 'c': 261 if ((cpg = atoi(optarg)) <= 0) 262 errx(1, "%s: bad cylinders/group", optarg); 263 cpgflg++; 264 break; 265 case 'd': 266 if ((rotdelay = atoi(optarg)) < 0) 267 errx(1, "%s: bad rotational delay", optarg); 268 break; 269 case 'e': 270 if ((maxbpg = atoi(optarg)) <= 0) 271 errx(1, "%s: bad blocks per file in a cylinder group", 272 optarg); 273 break; 274 case 'f': 275 if ((fsize = atoi(optarg)) <= 0) 276 errx(1, "%s: bad fragment size", optarg); 277 break; 278 case 'g': 279 if ((avgfilesize = atoi(optarg)) <= 0) 280 errx(1, "%s: bad average file size", optarg); 281 break; 282 case 'h': 283 if ((avgfpdir = atoi(optarg)) <= 0) 284 errx(1, "%s: bad expected files per directory", 285 optarg); 286 break; 287 case 'i': 288 if ((density = atoi(optarg)) <= 0) 289 errx(1, "%s: bad bytes per inode", optarg); 290 break; 291 case 'k': 292 if ((trackskew = atoi(optarg)) < 0) 293 errx(1, "%s: bad track skew", optarg); 294 break; 295 case 'l': 296 if ((interleave = atoi(optarg)) <= 0) 297 errx(1, "%s: bad interleave", optarg); 298 break; 299 case 'm': 300 if ((minfree = atoi(optarg)) < 0 || minfree > 99) 301 errx(1, "%s: bad free space %%", optarg); 302 break; 303 case 'n': 304 if ((nrpos = atoi(optarg)) <= 0) 305 errx(1, "%s: bad rotational layout count", 306 optarg); 307 break; 308 case 'o': 309 if (mfs) 310 getmntopts(optarg, mopts, &mntflags, 0); 311 else { 312 if (strcmp(optarg, "space") == 0) 313 opt = FS_OPTSPACE; 314 else if (strcmp(optarg, "time") == 0) 315 opt = FS_OPTTIME; 316 else 317 errx(1, "%s %s", 318 "unknown optimization preference: ", 319 "use `space' or `time'."); 320 } 321 break; 322 case 'p': 323 if ((trackspares = atoi(optarg)) < 0) 324 errx(1, "%s: bad spare sectors per track", 325 optarg); 326 break; 327 case 'r': 328 if ((rpm = atoi(optarg)) <= 0) 329 errx(1, "%s: bad revolutions/minute", optarg); 330 break; 331 case 's': 332 fssize = (int)strtol(optarg, &endp, 10); 333 if (*endp) { 334 if (mfs) { /* Only do 'm' for mfs */ 335 if (*endp == 'm' || *endp == 'M') 336 fssize *= 1024 * 1024 / 512; 337 else 338 fssize = -1; /* error */ 339 } 340 else 341 fssize = -1; /* error */ 342 } 343 if (fssize <= 0) 344 errx(1, "%s: bad file system size", optarg); 345 break; 346 case 't': 347 if ((ntracks = atoi(optarg)) <= 0) 348 errx(1, "%s: bad total tracks", optarg); 349 break; 350 case 'u': 351 if ((nsectors = atoi(optarg)) <= 0) 352 errx(1, "%s: bad sectors/track", optarg); 353 break; 354 case 'x': 355 if ((cylspares = atoi(optarg)) < 0) 356 errx(1, "%s: bad spare sectors per cylinder", 357 optarg); 358 break; 359 case '?': 360 default: 361 usage(); 362 } 363 argc -= optind; 364 argv += optind; 365 366 if (argc != 2 && (mfs || argc != 1)) 367 usage(); 368 369 special = argv[0]; 370 if (mfs && !strcmp(special, "swap")) { 371 /* 372 * it's an MFS, mounted on "swap." fake up a label. 373 * XXX XXX XXX 374 */ 375 fso = -1; /* XXX; normally done below. */ 376 377 memset(&mfsfakelabel, 0, sizeof(mfsfakelabel)); 378 mfsfakelabel.d_secsize = 512; 379 mfsfakelabel.d_nsectors = 64; 380 mfsfakelabel.d_ntracks = 16; 381 mfsfakelabel.d_ncylinders = 16; 382 mfsfakelabel.d_secpercyl = 1024; 383 mfsfakelabel.d_secperunit = 16384; 384 mfsfakelabel.d_rpm = 3600; 385 mfsfakelabel.d_interleave = 1; 386 mfsfakelabel.d_npartitions = 1; 387 mfsfakelabel.d_partitions[0].p_size = 16384; 388 mfsfakelabel.d_partitions[0].p_fsize = 1024; 389 mfsfakelabel.d_partitions[0].p_frag = 8; 390 mfsfakelabel.d_partitions[0].p_cpg = 16; 391 392 lp = &mfsfakelabel; 393 pp = &mfsfakelabel.d_partitions[0]; 394 395 goto havelabel; 396 } 397 cp = strrchr(special, '/'); 398 if (cp == 0) { 399 /* 400 * No path prefix; try /dev/r%s then /dev/%s. 401 */ 402 (void)snprintf(device, sizeof(device), "%sr%s", _PATH_DEV, 403 special); 404 if (stat(device, &st) == -1) 405 (void)snprintf(device, sizeof(device), "%s%s", 406 _PATH_DEV, special); 407 special = device; 408 } 409 if (Nflag) { 410 fso = -1; 411 } else { 412 fso = open(special, O_WRONLY); 413 if (fso < 0) 414 err(1, "%s: open", special); 415 416 /* Bail if target special is mounted */ 417 n = getmntinfo(&mp, MNT_NOWAIT); 418 if (n == 0) 419 err(1, "%s: getmntinfo", special); 420 421 len = sizeof(_PATH_DEV) - 1; 422 s1 = special; 423 if (strncmp(_PATH_DEV, s1, len) == 0) 424 s1 += len; 425 426 while (--n >= 0) { 427 s2 = mp->f_mntfromname; 428 if (strncmp(_PATH_DEV, s2, len) == 0) { 429 s2 += len - 1; 430 *s2 = 'r'; 431 } 432 if (strcmp(s1, s2) == 0 || strcmp(s1, &s2[1]) == 0) 433 errx(1, "%s is mounted on %s", 434 special, mp->f_mntonname); 435 ++mp; 436 } 437 } 438 if (mfs && disktype != NULL) { 439 lp = (struct disklabel *)getdiskbyname(disktype); 440 if (lp == NULL) 441 errx(1, "%s: unknown disk type", disktype); 442 pp = &lp->d_partitions[1]; 443 } else { 444 fsi = open(special, O_RDONLY); 445 if (fsi < 0) 446 err(1, "%s: open", special); 447 if (fstat(fsi, &st) < 0) 448 err(1, "%s: fstat", special); 449 if (!S_ISCHR(st.st_mode) && !mfs) 450 warnx("%s: not a character-special device", special); 451 cp = strchr(argv[0], '\0') - 1; 452 if (cp == 0 || ((*cp < 'a' || *cp > ('a' + maxpartitions - 1)) 453 && !isdigit(*cp))) 454 errx(1, "can't figure out file system partition"); 455 #ifdef COMPAT 456 if (!mfs && disktype == NULL) 457 disktype = argv[1]; 458 #endif 459 lp = getdisklabel(special, fsi); 460 if (isdigit(*cp)) 461 pp = &lp->d_partitions[0]; 462 else 463 pp = &lp->d_partitions[*cp - 'a']; 464 if (pp->p_size == 0) 465 errx(1, "`%c' partition is unavailable", *cp); 466 if (pp->p_fstype == FS_BOOT) 467 errx(1, "`%c' partition overlaps boot program", *cp); 468 } 469 havelabel: 470 if (fssize == 0) 471 fssize = pp->p_size; 472 if (fssize > pp->p_size && !mfs) 473 errx(1, "maximum file system size on the `%c' partition is %d", 474 *cp, pp->p_size); 475 if (rpm == 0) { 476 rpm = lp->d_rpm; 477 if (rpm <= 0) 478 rpm = 3600; 479 } 480 if (ntracks == 0) { 481 ntracks = lp->d_ntracks; 482 if (ntracks <= 0) 483 errx(1, "no default #tracks"); 484 } 485 if (nsectors == 0) { 486 nsectors = lp->d_nsectors; 487 if (nsectors <= 0) 488 errx(1, "no default #sectors/track"); 489 } 490 if (sectorsize == 0) { 491 sectorsize = lp->d_secsize; 492 if (sectorsize <= 0) 493 errx(1, "no default sector size"); 494 } 495 if (trackskew == -1) { 496 trackskew = lp->d_trackskew; 497 if (trackskew < 0) 498 trackskew = 0; 499 } 500 if (interleave == 0) { 501 interleave = lp->d_interleave; 502 if (interleave <= 0) 503 interleave = 1; 504 } 505 if (fsize == 0) { 506 fsize = pp->p_fsize; 507 if (fsize <= 0) 508 fsize = MAX(DFL_FRAGSIZE, lp->d_secsize); 509 } 510 if (bsize == 0) { 511 bsize = pp->p_frag * pp->p_fsize; 512 if (bsize <= 0) 513 bsize = MIN(DFL_BLKSIZE, 8 * fsize); 514 } 515 if (cpgflg == 0) { 516 if (pp->p_cpg != 0) 517 cpg = pp->p_cpg; 518 } 519 /* 520 * Maxcontig sets the default for the maximum number of blocks 521 * that may be allocated sequentially. With filesystem clustering 522 * it is possible to allocate contiguous blocks up to the maximum 523 * transfer size permitted by the controller or buffering. 524 */ 525 if (maxcontig == 0) 526 maxcontig = MAX(1, MIN(MAXPHYS, MAXBSIZE) / bsize); 527 if (density == 0) 528 density = NFPI * fsize; 529 if (minfree < MINFREE && opt != FS_OPTSPACE) { 530 warnx("%s %s %d%%", "Warning: changing optimization to space", 531 "because minfree is less than", MINFREE); 532 opt = FS_OPTSPACE; 533 } 534 if (trackspares == -1) { 535 trackspares = lp->d_sparespertrack; 536 if (trackspares < 0) 537 trackspares = 0; 538 } 539 nphyssectors = nsectors + trackspares; 540 if (cylspares == -1) { 541 cylspares = lp->d_sparespercyl; 542 if (cylspares < 0) 543 cylspares = 0; 544 } 545 secpercyl = nsectors * ntracks - cylspares; 546 if (secpercyl != lp->d_secpercyl) 547 warnx("%s (%d) %s (%u)\n", 548 "Warning: calculated sectors per cylinder", secpercyl, 549 "disagrees with disk label", lp->d_secpercyl); 550 if (maxbpg == 0) 551 maxbpg = MAXBLKPG(bsize); 552 #ifdef notdef /* label may be 0 if faked up by kernel */ 553 bbsize = lp->d_bbsize; 554 sbsize = lp->d_sbsize; 555 #endif 556 oldpartition = *pp; 557 mkfs(pp, special, fsi, fso); 558 if (!Nflag && memcmp(pp, &oldpartition, sizeof(oldpartition))) 559 rewritelabel(special, fso, lp); 560 if (!Nflag) 561 close(fso); 562 close(fsi); 563 #ifdef MFS 564 if (mfs) { 565 struct mfs_args args; 566 567 switch (pid = fork()) { 568 case -1: 569 perror("mfs"); 570 exit(10); 571 case 0: 572 (void)snprintf(mountfromname, sizeof(mountfromname), 573 "mfs:%d", getpid()); 574 break; 575 default: 576 (void)snprintf(mountfromname, sizeof(mountfromname), 577 "mfs:%d", pid); 578 for (;;) { 579 /* 580 * spin until the mount succeeds 581 * or the child exits 582 */ 583 usleep(1); 584 585 /* 586 * XXX Here is a race condition: another process 587 * can mount a filesystem which hides our 588 * ramdisk before we see the success. 589 */ 590 if (statfs(argv[1], &sf) < 0) 591 err(88, "statfs %s", argv[1]); 592 if (!strcmp(sf.f_mntfromname, mountfromname) && 593 !strncmp(sf.f_mntonname, argv[1], 594 MNAMELEN) && 595 !strcmp(sf.f_fstypename, "mfs")) 596 exit(0); 597 598 res = waitpid(pid, &status, WNOHANG); 599 if (res == -1) 600 err(11, "waitpid"); 601 if (res != pid) 602 continue; 603 if (WIFEXITED(status)) { 604 if (WEXITSTATUS(status) == 0) 605 exit(0); 606 errx(1, "%s: mount: %s", argv[1], 607 strerror(WEXITSTATUS(status))); 608 } else 609 errx(11, "abnormal termination"); 610 } 611 /* NOTREACHED */ 612 } 613 614 (void) setsid(); 615 (void) close(0); 616 (void) close(1); 617 (void) close(2); 618 (void) chdir("/"); 619 620 args.fspec = mountfromname; 621 args.export.ex_root = -2; 622 if (mntflags & MNT_RDONLY) 623 args.export.ex_flags = MNT_EXRDONLY; 624 else 625 args.export.ex_flags = 0; 626 args.base = membase; 627 args.size = fssize * sectorsize; 628 if (mount(MOUNT_MFS, argv[1], mntflags, &args) < 0) 629 exit(errno); /* parent prints message */ 630 } 631 #endif 632 exit(0); 633 } 634 635 #ifdef COMPAT 636 const char lmsg[] = "%s: can't read disk label; disk type must be specified"; 637 #else 638 const char lmsg[] = "%s: can't read disk label"; 639 #endif 640 641 static struct disklabel * 642 getdisklabel(char *s, volatile int fd) 643 /* XXX why is fs volatile?! */ 644 { 645 static struct disklabel lab; 646 647 if (ioctl(fd, DIOCGDINFO, &lab) < 0) { 648 #ifdef COMPAT 649 if (disktype) { 650 struct disklabel *lp; 651 652 unlabeled++; 653 lp = getdiskbyname(disktype); 654 if (lp == NULL) 655 errx(1, "%s: unknown disk type", disktype); 656 return (lp); 657 } 658 #endif 659 warn("ioctl (GDINFO)"); 660 errx(1, lmsg, s); 661 } 662 return (&lab); 663 } 664 665 static void 666 rewritelabel(char *s, volatile int fd, struct disklabel *lp) 667 /* XXX why is fd volatile?! */ 668 { 669 #ifdef COMPAT 670 if (unlabeled) 671 return; 672 #endif 673 lp->d_checksum = 0; 674 lp->d_checksum = dkcksum(lp); 675 if (ioctl(fd, DIOCWDINFO, (char *)lp) < 0) { 676 warn("ioctl (WDINFO)"); 677 errx(1, "%s: can't rewrite disk label", s); 678 } 679 #if __vax__ 680 if (lp->d_type == DTYPE_SMD && lp->d_flags & D_BADSECT) { 681 int i; 682 int cfd; 683 daddr_t alt; 684 char specname[64]; 685 char blk[1024]; 686 char *cp; 687 688 /* 689 * Make name for 'c' partition. 690 */ 691 strcpy(specname, s); 692 cp = specname + strlen(specname) - 1; 693 if (!isdigit(*cp)) 694 *cp = 'c'; 695 cfd = open(specname, O_WRONLY); 696 if (cfd < 0) 697 err(1, "%s: open", specname); 698 memset(blk, 0, sizeof(blk)); 699 *(struct disklabel *)(blk + LABELOFFSET) = *lp; 700 alt = lp->d_ncylinders * lp->d_secpercyl - lp->d_nsectors; 701 for (i = 1; i < 11 && i < lp->d_nsectors; i += 2) { 702 off_t offset; 703 704 offset = alt + i; 705 offset *= lp->d_secsize; 706 if (lseek(cfd, offset, SEEK_SET) == -1) 707 err(1, "lseek to badsector area: "); 708 if (write(cfd, blk, lp->d_secsize) < lp->d_secsize) 709 warn("alternate label %d write", i/2); 710 } 711 close(cfd); 712 } 713 #endif 714 } 715 716 static void 717 usage(void) 718 { 719 if (mfs) { 720 fprintf(stderr, 721 "usage: %s [ -fsoptions ] special-device mount-point\n", 722 __progname); 723 } else 724 fprintf(stderr, 725 "usage: %s [ -fsoptions ] special-device%s\n", 726 __progname, 727 #ifdef COMPAT 728 " [device-type]"); 729 #else 730 ""); 731 #endif 732 fprintf(stderr, "where fsoptions are:\n"); 733 fprintf(stderr, "\t-B byte order (`be' or `le')\n"); 734 fprintf(stderr, 735 "\t-N do not create file system, just print out parameters\n"); 736 fprintf(stderr, "\t-O create a 4.3BSD format filesystem\n"); 737 fprintf(stderr, "\t-S sector size\n"); 738 #ifdef COMPAT 739 fprintf(stderr, "\t-T disktype\n"); 740 #endif 741 fprintf(stderr, "\t-a maximum contiguous blocks\n"); 742 fprintf(stderr, "\t-b block size\n"); 743 fprintf(stderr, "\t-c cylinders/group\n"); 744 fprintf(stderr, "\t-d rotational delay between contiguous blocks\n"); 745 fprintf(stderr, "\t-e maximum blocks per file in a cylinder group\n"); 746 fprintf(stderr, "\t-f frag size\n"); 747 fprintf(stderr, "\t-g average file size\n"); 748 fprintf(stderr, "\t-h average files per directory\n"); 749 fprintf(stderr, "\t-i number of bytes per inode\n"); 750 fprintf(stderr, "\t-k sector 0 skew, per track\n"); 751 fprintf(stderr, "\t-l hardware sector interleave\n"); 752 fprintf(stderr, "\t-m minimum free space %%\n"); 753 fprintf(stderr, "\t-n number of distinguished rotational positions\n"); 754 fprintf(stderr, "\t-o optimization preference (`space' or `time')\n"); 755 fprintf(stderr, "\t-p spare sectors per track\n"); 756 fprintf(stderr, "\t-s file system size (sectors)\n"); 757 fprintf(stderr, "\t-r revolutions/minute\n"); 758 fprintf(stderr, "\t-t tracks/cylinder\n"); 759 fprintf(stderr, "\t-u sectors/track\n"); 760 fprintf(stderr, "\t-x spare sectors per cylinder\n"); 761 exit(1); 762 } 763
Indexes created Thu Oct 23 22:10:10 GMT 2025