newfs.c revision 1.57
1 /* $NetBSD: newfs.c,v 1.57 2002/02/16 19:39:30 thorpej 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 1.57 2002/02/16 19:39:30 thorpej 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/ioctl.h> 55 #include <sys/disklabel.h> 56 #include <sys/file.h> 57 #include <sys/mount.h> 58 #include <sys/sysctl.h> 59 #include <sys/wait.h> 60 61 #include <ufs/ufs/dir.h> 62 #include <ufs/ufs/dinode.h> 63 #include <ufs/ufs/ufsmount.h> 64 #include <ufs/ffs/fs.h> 65 66 #include <ctype.h> 67 #include <disktab.h> 68 #include <err.h> 69 #include <errno.h> 70 #include <grp.h> 71 #include <paths.h> 72 #include <pwd.h> 73 #include <signal.h> 74 #include <stdio.h> 75 #include <stdlib.h> 76 #include <string.h> 77 #include <syslog.h> 78 #include <unistd.h> 79 #include <util.h> 80 81 #include "mntopts.h" 82 #include "dkcksum.h" 83 #include "extern.h" 84 85 struct mntopt mopts[] = { 86 MOPT_STDOPTS, 87 MOPT_ASYNC, 88 MOPT_UPDATE, 89 MOPT_NOATIME, 90 { NULL }, 91 }; 92 93 static struct disklabel *getdisklabel(char *, int); 94 static void rewritelabel(char *, int, struct disklabel *); 95 static gid_t mfs_group(const char *); 96 static uid_t mfs_user(const char *); 97 static int strsuftoi(const char *, const char *, int, int); 98 static void usage(void); 99 int main(int, char *[]); 100 101 #define COMPAT /* allow non-labeled disks */ 102 103 /* 104 * The following two constants set the default block and fragment sizes. 105 * Both constants must be a power of 2 and meet the following constraints: 106 * MINBSIZE <= DESBLKSIZE <= MAXBSIZE 107 * sectorsize <= DESFRAGSIZE <= DESBLKSIZE 108 * DESBLKSIZE / DESFRAGSIZE <= 8 109 */ 110 /* 111 * For file systems smaller than SMALL_FSSIZE we use the S_DFL_* defaults, 112 * otherwise if less than MEDIUM_FSSIZE use M_DFL_*, otherwise use 113 * L_DFL_*. 114 */ 115 #define SMALL_FSSIZE (20*1024*2) 116 #define S_DFL_FRAGSIZE 512 117 #define S_DFL_BLKSIZE 4096 118 #define MEDIUM_FSSIZE (1000*1024*2) 119 #define M_DFL_FRAGSIZE 1024 120 #define M_DFL_BLKSIZE 8192 121 #define L_DFL_FRAGSIZE 2048 122 #define L_DFL_BLKSIZE 16384 123 124 /* 125 * Default sector size. 126 */ 127 #define DFL_SECSIZE 512 128 129 /* 130 * Cylinder groups may have up to many cylinders. The actual 131 * number used depends upon how much information can be stored 132 * on a single cylinder. The default is to use 16 cylinders 133 * per group. 134 */ 135 #define DESCPG 65536 /* desired fs_cpg ("infinity") */ 136 137 /* 138 * ROTDELAY gives the minimum number of milliseconds to initiate 139 * another disk transfer on the same cylinder. It is used in 140 * determining the rotationally optimal layout for disk blocks 141 * within a file; the default of fs_rotdelay is 0ms. 142 */ 143 #define ROTDELAY 0 144 145 /* 146 * MAXBLKPG determines the maximum number of data blocks which are 147 * placed in a single cylinder group. The default is one indirect 148 * block worth of data blocks. 149 */ 150 #define MAXBLKPG(bsize) ((bsize) / sizeof(daddr_t)) 151 152 /* 153 * Each file system has a number of inodes statically allocated. 154 * We allocate one inode slot per NFPI fragments, expecting this 155 * to be far more than we will ever need. 156 */ 157 #define NFPI 4 158 159 /* 160 * For each cylinder we keep track of the availability of blocks at different 161 * rotational positions, so that we can lay out the data to be picked 162 * up with minimum rotational latency. NRPOS is the default number of 163 * rotational positions that we distinguish. With NRPOS of 8 the resolution 164 * of our summary information is 2ms for a typical 3600 rpm drive. Caching 165 * and zoning pretty much defeats rotational optimization, so we now use a 166 * default of 1. 167 */ 168 #define NRPOS 1 /* number distinct rotational positions */ 169 170 171 int mfs; /* run as the memory based filesystem */ 172 int Nflag; /* run without writing file system */ 173 int Oflag; /* format as an 4.3BSD file system */ 174 int fssize; /* file system size */ 175 int ntracks; /* # tracks/cylinder */ 176 int nsectors; /* # sectors/track */ 177 int nphyssectors; /* # sectors/track including spares */ 178 int secpercyl; /* sectors per cylinder */ 179 int trackspares = -1; /* spare sectors per track */ 180 int cylspares = -1; /* spare sectors per cylinder */ 181 int sectorsize; /* bytes/sector */ 182 int rpm; /* revolutions/minute of drive */ 183 int interleave; /* hardware sector interleave */ 184 int trackskew = -1; /* sector 0 skew, per track */ 185 int fsize = 0; /* fragment size */ 186 int bsize = 0; /* block size */ 187 int cpg = DESCPG; /* cylinders/cylinder group */ 188 int cpgflg; /* cylinders/cylinder group flag was given */ 189 int minfree = MINFREE; /* free space threshold */ 190 int opt = DEFAULTOPT; /* optimization preference (space or time) */ 191 int density; /* number of bytes per inode */ 192 int maxcontig = 0; /* max contiguous blocks to allocate */ 193 int rotdelay = ROTDELAY; /* rotational delay between blocks */ 194 int maxbpg; /* maximum blocks per file in a cyl group */ 195 int nrpos = NRPOS; /* # of distinguished rotational positions */ 196 int avgfilesize = AVFILESIZ;/* expected average file size */ 197 int avgfpdir = AFPDIR; /* expected number of files per directory */ 198 int bbsize = BBSIZE; /* boot block size */ 199 int sbsize = SBSIZE; /* superblock size */ 200 int mntflags = MNT_ASYNC; /* flags to be passed to mount */ 201 u_long memleft; /* virtual memory available */ 202 caddr_t membase; /* start address of memory based filesystem */ 203 int needswap; /* Filesystem not in native byte order */ 204 #ifdef COMPAT 205 char *disktype; 206 int unlabeled; 207 #endif 208 209 char device[MAXPATHLEN]; 210 211 int 212 main(int argc, char *argv[]) 213 { 214 struct partition *pp; 215 struct disklabel *lp; 216 struct disklabel mfsfakelabel; 217 struct partition oldpartition; 218 struct statfs *mp; 219 int ch, fsi, fso, len, maxpartitions, n, Fflag, Zflag; 220 char *cp, *endp, *s1, *s2, *special; 221 const char *opstring; 222 long long llsize; 223 int dfl_fragsize, dfl_blksize; 224 #ifdef MFS 225 char mountfromname[100]; 226 pid_t pid, res; 227 struct statfs sf; 228 int status; 229 #endif 230 mode_t mfsmode; 231 uid_t mfsuid; 232 gid_t mfsgid; 233 234 cp = NULL; 235 fsi = fso = -1; 236 Fflag = Zflag = 0; 237 if (strstr(getprogname(), "mfs")) { 238 mfs = 1; 239 mfsmode = 01777; /* default mode for a /tmp-type directory */ 240 mfsuid = 0; /* user root */ 241 mfsgid = 0; /* group wheel */ 242 Nflag++; 243 } 244 245 maxpartitions = getmaxpartitions(); 246 if (maxpartitions > 26) 247 errx(1, "insane maxpartitions value %d", maxpartitions); 248 249 opstring = mfs ? 250 "NT:a:b:c:d:e:f:g:h:i:m:o:p:s:u:" : 251 "B:FNOS:T:Za:b:c:d:e:f:g:h:i:k:l:m:n:o:p:r:s:t:u:x:"; 252 while ((ch = getopt(argc, argv, opstring)) != -1) 253 switch (ch) { 254 case 'B': 255 if (strcmp(optarg, "be") == 0) { 256 #if BYTE_ORDER == LITTLE_ENDIAN 257 needswap = 1; 258 #endif 259 } else if (strcmp(optarg, "le") == 0) { 260 #if BYTE_ORDER == BIG_ENDIAN 261 needswap = 1; 262 #endif 263 } else 264 usage(); 265 break; 266 case 'F': 267 Fflag = 1; 268 break; 269 case 'N': 270 Nflag = 1; 271 break; 272 case 'O': 273 Oflag = 1; 274 break; 275 case 'S': 276 sectorsize = strsuftoi("sector size", 277 optarg, 1, INT_MAX); 278 break; 279 #ifdef COMPAT 280 case 'T': 281 disktype = optarg; 282 break; 283 #endif 284 case 'Z': 285 Zflag = 1; 286 break; 287 case 'a': 288 maxcontig = strsuftoi("maximum contiguous blocks", 289 optarg, 1, INT_MAX); 290 break; 291 case 'b': 292 bsize = strsuftoi("block size", 293 optarg, MINBSIZE, MAXBSIZE); 294 break; 295 case 'c': 296 cpg = strsuftoi("cylinders per group", 297 optarg, 1, INT_MAX); 298 cpgflg++; 299 break; 300 case 'd': 301 rotdelay = strsuftoi("rotational delay", 302 optarg, 0, INT_MAX); 303 break; 304 case 'e': 305 maxbpg = strsuftoi( 306 "blocks per file in a cylinder group", 307 optarg, 1, INT_MAX); 308 break; 309 case 'f': 310 fsize = strsuftoi("fragment size", 311 optarg, 1, MAXBSIZE); 312 break; 313 case 'g': 314 if (mfs) 315 mfsgid = mfs_group(optarg); 316 else { 317 avgfilesize = strsuftoi("average file size", 318 optarg, 1, INT_MAX); 319 } 320 break; 321 case 'h': 322 avgfpdir = strsuftoi("expected files per directory", 323 optarg, 1, INT_MAX); 324 break; 325 case 'i': 326 density = strsuftoi("bytes per inode", 327 optarg, 1, INT_MAX); 328 break; 329 case 'k': 330 trackskew = strsuftoi("track skew", 331 optarg, 0, INT_MAX); 332 break; 333 case 'l': 334 interleave = strsuftoi("interleave", 335 optarg, 1, INT_MAX); 336 break; 337 case 'm': 338 minfree = strsuftoi("free space %", 339 optarg, 0, 99); 340 break; 341 case 'n': 342 nrpos = strsuftoi("rotational layout count", 343 optarg, 1, INT_MAX); 344 break; 345 case 'o': 346 if (mfs) 347 getmntopts(optarg, mopts, &mntflags, 0); 348 else { 349 if (strcmp(optarg, "space") == 0) 350 opt = FS_OPTSPACE; 351 else if (strcmp(optarg, "time") == 0) 352 opt = FS_OPTTIME; 353 else 354 errx(1, "%s %s", 355 "unknown optimization preference: ", 356 "use `space' or `time'."); 357 } 358 break; 359 case 'p': 360 if (mfs) { 361 if ((mfsmode = strtol(optarg, NULL, 8)) <= 0) 362 errx(1, "bad mode `%s'", optarg); 363 } else { 364 trackspares = strsuftoi( 365 "spare sectors per track", optarg, 0, 366 INT_MAX); 367 } 368 break; 369 case 'r': 370 rpm = strsuftoi("revolutions per minute", 371 optarg, 1, INT_MAX); 372 break; 373 case 's': 374 llsize = strtoll(optarg, &endp, 10); 375 if (endp[0] != '\0' && endp[1] != '\0') 376 llsize = -1; 377 else { 378 int ssiz; 379 380 ssiz = (sectorsize ? sectorsize : DFL_SECSIZE); 381 switch (tolower((unsigned char)endp[0])) { 382 case 'b': 383 llsize /= ssiz; 384 break; 385 case 'k': 386 llsize *= 1024 / ssiz; 387 break; 388 case 'm': 389 llsize *= 1024 * 1024 / ssiz; 390 break; 391 case 'g': 392 llsize *= 1024 * 1024 * 1024 / ssiz; 393 break; 394 case '\0': 395 case 's': 396 break; 397 default: 398 llsize = -1; 399 } 400 } 401 if (llsize > INT_MAX) 402 errx(1, "file system size `%s' is too large.", 403 optarg); 404 if (llsize <= 0) 405 errx(1, 406 "`%s' is not a valid number for file system size.", 407 optarg); 408 fssize = (int)llsize; 409 break; 410 case 't': 411 ntracks = strsuftoi("total tracks", 412 optarg, 1, INT_MAX); 413 break; 414 case 'u': 415 if (mfs) 416 mfsuid = mfs_user(optarg); 417 else { 418 nsectors = strsuftoi("sectors per track", 419 optarg, 1, INT_MAX); 420 } 421 break; 422 case 'x': 423 cylspares = strsuftoi("spare sectors per cylinder", 424 optarg, 0, INT_MAX); 425 break; 426 case '?': 427 default: 428 usage(); 429 } 430 argc -= optind; 431 argv += optind; 432 433 if (argc != 2 && (mfs || argc != 1)) 434 usage(); 435 436 special = argv[0]; 437 if (Fflag || mfs) { 438 /* 439 * it's a file system image or an MFS, so fake up a label. 440 * XXX 441 */ 442 if (!sectorsize) 443 sectorsize = DFL_SECSIZE; 444 445 if (Fflag && !Nflag) { /* creating image in a regular file */ 446 if (fssize == 0) 447 errx(1, "need to specify size when using -F"); 448 fso = open(special, O_RDWR | O_CREAT | O_TRUNC, 0777); 449 if (fso == -1) 450 err(1, "can't open file %s", special); 451 if ((fsi = dup(fso)) == -1) 452 err(1, "can't dup(2) image fd"); 453 /* XXXLUKEM: only ftruncate() regular files ? */ 454 if (ftruncate(fso, (off_t)fssize * sectorsize) == -1) 455 err(1, "can't resize %s to %d", 456 special, fssize); 457 458 if (Zflag) { /* pre-zero the file */ 459 char *buf; 460 int bufsize, i; 461 off_t bufrem; 462 struct statfs sfs; 463 464 if (fstatfs(fso, &sfs) == -1) { 465 warn("can't fstatfs `%s'", special); 466 bufsize = 8192; 467 } else 468 bufsize = sfs.f_iosize; 469 470 if ((buf = calloc(1, bufsize)) == NULL) 471 err(1, "can't malloc buffer of %d", 472 bufsize); 473 bufrem = fssize * sectorsize; 474 printf( 475 "Creating file system image in `%s', size %lld bytes, in %d byte chunks.\n", 476 special, (long long)bufrem, bufsize); 477 while (bufrem > 0) { 478 i = write(fso, buf, 479 MIN(bufsize, bufrem)); 480 if (i == -1) 481 err(1, "writing image"); 482 bufrem -= i; 483 } 484 } 485 486 } 487 488 memset(&mfsfakelabel, 0, sizeof(mfsfakelabel)); 489 mfsfakelabel.d_secsize = sectorsize; 490 mfsfakelabel.d_nsectors = 64; /* these 3 add up to 16MB */ 491 mfsfakelabel.d_ntracks = 16; 492 mfsfakelabel.d_ncylinders = 16; 493 mfsfakelabel.d_secpercyl = 494 mfsfakelabel.d_nsectors * mfsfakelabel.d_ntracks; 495 mfsfakelabel.d_secperunit = 496 mfsfakelabel.d_ncylinders * mfsfakelabel.d_secpercyl; 497 mfsfakelabel.d_rpm = 10000; 498 mfsfakelabel.d_interleave = 1; 499 mfsfakelabel.d_npartitions = 1; 500 mfsfakelabel.d_partitions[0].p_size = mfsfakelabel.d_secperunit; 501 mfsfakelabel.d_partitions[0].p_fsize = 1024; 502 mfsfakelabel.d_partitions[0].p_frag = 8; 503 mfsfakelabel.d_partitions[0].p_cpg = 16; 504 505 lp = &mfsfakelabel; 506 pp = &mfsfakelabel.d_partitions[0]; 507 } else { /* !Fflag && !mfs */ 508 fsi = opendisk(special, O_RDONLY, device, sizeof(device), 0); 509 special = device; 510 if (fsi < 0) 511 err(1, "%s: open for read", special); 512 513 if (Nflag) { 514 fso = -1; 515 } else { 516 fso = open(special, O_WRONLY); 517 if (fso < 0) 518 err(1, "%s: open for write", special); 519 520 /* Bail if target special is mounted */ 521 n = getmntinfo(&mp, MNT_NOWAIT); 522 if (n == 0) 523 err(1, "%s: getmntinfo", special); 524 525 len = sizeof(_PATH_DEV) - 1; 526 s1 = special; 527 if (strncmp(_PATH_DEV, s1, len) == 0) 528 s1 += len; 529 530 while (--n >= 0) { 531 s2 = mp->f_mntfromname; 532 if (strncmp(_PATH_DEV, s2, len) == 0) { 533 s2 += len - 1; 534 *s2 = 'r'; 535 } 536 if (strcmp(s1, s2) == 0 || 537 strcmp(s1, &s2[1]) == 0) 538 errx(1, "%s is mounted on %s", 539 special, mp->f_mntonname); 540 ++mp; 541 } 542 } 543 cp = strchr(argv[0], '\0') - 1; 544 if (cp == 0 || ((*cp < 'a' || *cp > ('a' + maxpartitions - 1)) 545 && !isdigit(*cp))) 546 errx(1, "can't figure out file system partition"); 547 #ifdef COMPAT 548 if (disktype == NULL) 549 disktype = argv[1]; 550 #endif 551 lp = getdisklabel(special, fsi); 552 if (isdigit(*cp)) 553 pp = &lp->d_partitions[0]; 554 else 555 pp = &lp->d_partitions[*cp - 'a']; 556 if (pp->p_size == 0) 557 errx(1, "`%c' partition is unavailable", *cp); 558 #if 0 559 /* 560 * While one might think this test is useful, newfs 561 * has historically allowed this operation, and some 562 * people make use of this feature. 563 */ 564 if (pp->p_fstype != FS_BSDFFS) 565 errx(1, "`%c' partition type is not `4.2BSD'", *cp); 566 #endif 567 } /* !Fflag && !mfs */ 568 569 if (fssize == 0) 570 fssize = pp->p_size; 571 if (fssize > pp->p_size && !mfs && !Fflag) 572 errx(1, "maximum file system size on the `%c' partition is %d", 573 *cp, pp->p_size); 574 if (rpm == 0) { 575 rpm = lp->d_rpm; 576 if (rpm <= 0) 577 rpm = 3600; 578 } 579 if (ntracks == 0) { 580 ntracks = lp->d_ntracks; 581 if (ntracks <= 0) 582 errx(1, "no default #tracks"); 583 } 584 if (nsectors == 0) { 585 nsectors = lp->d_nsectors; 586 if (nsectors <= 0) 587 errx(1, "no default #sectors/track"); 588 } 589 if (sectorsize == 0) { 590 sectorsize = lp->d_secsize; 591 if (sectorsize <= 0) 592 errx(1, "no default sector size"); 593 } 594 if (trackskew == -1) { 595 trackskew = lp->d_trackskew; 596 if (trackskew < 0) 597 trackskew = 0; 598 } 599 if (interleave == 0) { 600 interleave = lp->d_interleave; 601 if (interleave <= 0) 602 interleave = 1; 603 } 604 605 if (fssize < SMALL_FSSIZE) { 606 dfl_fragsize = S_DFL_FRAGSIZE; 607 dfl_blksize = S_DFL_BLKSIZE; 608 } else if (fssize < MEDIUM_FSSIZE) { 609 dfl_fragsize = M_DFL_FRAGSIZE; 610 dfl_blksize = M_DFL_BLKSIZE; 611 } else { 612 dfl_fragsize = L_DFL_FRAGSIZE; 613 dfl_blksize = L_DFL_BLKSIZE; 614 } 615 616 if (fsize == 0) { 617 fsize = pp->p_fsize; 618 if (fsize <= 0) 619 fsize = MAX(dfl_fragsize, lp->d_secsize); 620 } 621 if (bsize == 0) { 622 bsize = pp->p_frag * pp->p_fsize; 623 if (bsize <= 0) 624 bsize = MIN(dfl_blksize, 8 * fsize); 625 } 626 /* 627 * Maxcontig sets the default for the maximum number of blocks 628 * that may be allocated sequentially. With filesystem clustering 629 * it is possible to allocate contiguous blocks up to the maximum 630 * transfer size permitted by the controller or buffering. 631 */ 632 if (maxcontig == 0) 633 maxcontig = MAX(1, MIN(MAXPHYS, MAXBSIZE) / bsize); 634 if (density == 0) 635 density = NFPI * fsize; 636 if (minfree < MINFREE && opt != FS_OPTSPACE) { 637 warnx("%s %s %d%%", "Warning: changing optimization to space", 638 "because minfree is less than", MINFREE); 639 opt = FS_OPTSPACE; 640 } 641 if (trackspares == -1) { 642 trackspares = lp->d_sparespertrack; 643 if (trackspares < 0) 644 trackspares = 0; 645 } 646 nphyssectors = nsectors + trackspares; 647 if (cylspares == -1) { 648 cylspares = lp->d_sparespercyl; 649 if (cylspares < 0) 650 cylspares = 0; 651 } 652 secpercyl = nsectors * ntracks - cylspares; 653 if (secpercyl != lp->d_secpercyl) 654 warnx("%s (%d) %s (%u)\n", 655 "Warning: calculated sectors per cylinder", secpercyl, 656 "disagrees with disk label", lp->d_secpercyl); 657 if (maxbpg == 0) 658 maxbpg = MAXBLKPG(bsize); 659 #ifdef notdef /* label may be 0 if faked up by kernel */ 660 bbsize = lp->d_bbsize; 661 sbsize = lp->d_sbsize; 662 #endif 663 oldpartition = *pp; 664 mkfs(pp, special, fsi, fso, mfsmode, mfsuid, mfsgid); 665 if (!Nflag && memcmp(pp, &oldpartition, sizeof(oldpartition)) && !Fflag) 666 rewritelabel(special, fso, lp); 667 if (!Nflag) 668 close(fso); 669 close(fsi); 670 #ifdef MFS 671 if (mfs) { 672 struct mfs_args args; 673 674 switch (pid = fork()) { 675 case -1: 676 perror("mfs"); 677 exit(10); 678 case 0: 679 (void)snprintf(mountfromname, sizeof(mountfromname), 680 "mfs:%d", getpid()); 681 break; 682 default: 683 (void)snprintf(mountfromname, sizeof(mountfromname), 684 "mfs:%d", pid); 685 for (;;) { 686 /* 687 * spin until the mount succeeds 688 * or the child exits 689 */ 690 usleep(1); 691 692 /* 693 * XXX Here is a race condition: another process 694 * can mount a filesystem which hides our 695 * ramdisk before we see the success. 696 */ 697 if (statfs(argv[1], &sf) < 0) 698 err(88, "statfs %s", argv[1]); 699 if (!strcmp(sf.f_mntfromname, mountfromname) && 700 !strncmp(sf.f_mntonname, argv[1], 701 MNAMELEN) && 702 !strcmp(sf.f_fstypename, "mfs")) 703 exit(0); 704 705 res = waitpid(pid, &status, WNOHANG); 706 if (res == -1) 707 err(11, "waitpid"); 708 if (res != pid) 709 continue; 710 if (WIFEXITED(status)) { 711 if (WEXITSTATUS(status) == 0) 712 exit(0); 713 errx(1, "%s: mount: %s", argv[1], 714 strerror(WEXITSTATUS(status))); 715 } else 716 errx(11, "abnormal termination"); 717 } 718 /* NOTREACHED */ 719 } 720 721 (void) setsid(); 722 (void) close(0); 723 (void) close(1); 724 (void) close(2); 725 (void) chdir("/"); 726 727 args.fspec = mountfromname; 728 args.export.ex_root = -2; 729 if (mntflags & MNT_RDONLY) 730 args.export.ex_flags = MNT_EXRDONLY; 731 else 732 args.export.ex_flags = 0; 733 args.base = membase; 734 args.size = fssize * sectorsize; 735 if (mount(MOUNT_MFS, argv[1], mntflags, &args) < 0) 736 exit(errno); /* parent prints message */ 737 } 738 #endif 739 exit(0); 740 } 741 742 #ifdef COMPAT 743 const char lmsg[] = "%s: can't read disk label; disk type must be specified"; 744 #else 745 const char lmsg[] = "%s: can't read disk label"; 746 #endif 747 748 static struct disklabel * 749 getdisklabel(char *s, volatile int fd) 750 /* XXX why is fs volatile?! */ 751 { 752 static struct disklabel lab; 753 754 if (ioctl(fd, DIOCGDINFO, &lab) < 0) { 755 #ifdef COMPAT 756 if (disktype) { 757 struct disklabel *lp; 758 759 unlabeled++; 760 lp = getdiskbyname(disktype); 761 if (lp == NULL) 762 errx(1, "%s: unknown disk type", disktype); 763 return (lp); 764 } 765 #endif 766 warn("ioctl (GDINFO)"); 767 errx(1, lmsg, s); 768 } 769 return (&lab); 770 } 771 772 static void 773 rewritelabel(char *s, volatile int fd, struct disklabel *lp) 774 /* XXX why is fd volatile?! */ 775 { 776 #ifdef COMPAT 777 if (unlabeled) 778 return; 779 #endif 780 lp->d_checksum = 0; 781 lp->d_checksum = dkcksum(lp); 782 if (ioctl(fd, DIOCWDINFO, (char *)lp) < 0) { 783 if (errno == ESRCH) 784 return; 785 warn("ioctl (WDINFO)"); 786 errx(1, "%s: can't rewrite disk label", s); 787 } 788 #if __vax__ 789 if (lp->d_type == DTYPE_SMD && lp->d_flags & D_BADSECT) { 790 int i; 791 int cfd; 792 daddr_t alt; 793 char specname[64]; 794 char blk[1024]; 795 char *cp; 796 797 /* 798 * Make name for 'c' partition. 799 */ 800 strcpy(specname, s); 801 cp = specname + strlen(specname) - 1; 802 if (!isdigit(*cp)) 803 *cp = 'c'; 804 cfd = open(specname, O_WRONLY); 805 if (cfd < 0) 806 err(1, "%s: open", specname); 807 memset(blk, 0, sizeof(blk)); 808 *(struct disklabel *)(blk + LABELOFFSET) = *lp; 809 alt = lp->d_ncylinders * lp->d_secpercyl - lp->d_nsectors; 810 for (i = 1; i < 11 && i < lp->d_nsectors; i += 2) { 811 off_t offset; 812 813 offset = alt + i; 814 offset *= lp->d_secsize; 815 if (lseek(cfd, offset, SEEK_SET) == -1) 816 err(1, "lseek to badsector area: "); 817 if (write(cfd, blk, lp->d_secsize) < lp->d_secsize) 818 warn("alternate label %d write", i/2); 819 } 820 close(cfd); 821 } 822 #endif 823 } 824 825 static gid_t 826 mfs_group(const char *gname) 827 { 828 struct group *gp; 829 830 if (!(gp = getgrnam(gname)) && !isdigit((unsigned char)*gname)) 831 errx(1, "unknown gname %s", gname); 832 return gp ? gp->gr_gid : atoi(gname); 833 } 834 835 static uid_t 836 mfs_user(const char *uname) 837 { 838 struct passwd *pp; 839 840 if (!(pp = getpwnam(uname)) && !isdigit((unsigned char)*uname)) 841 errx(1, "unknown user %s", uname); 842 return pp ? pp->pw_uid : atoi(uname); 843 } 844 845 static int 846 strsuftoi(const char *desc, const char *arg, int min, int max) 847 { 848 long long result; 849 char *ep; 850 851 errno = 0; 852 result = strtoll(arg, &ep, 10); 853 if (ep[0] != '\0' && ep[1] != '\0') 854 errx(1, "%s `%s' is not a valid number.", desc, arg); 855 switch (tolower((unsigned char)ep[0])) { 856 case '\0': 857 case 'b': 858 break; 859 case 'k': 860 result <<= 10; 861 break; 862 case 'm': 863 result <<= 20; 864 break; 865 case 'g': 866 result <<= 30; 867 break; 868 default: 869 errx(1, "`%s' is not a valid suffix for %s.", ep, desc); 870 } 871 if (result < min) 872 errx(1, "%s `%s' (%lld) is less than minimum (%d).", 873 desc, arg, result, min); 874 if (result > max) 875 errx(1, "%s `%s' (%lld) is greater than maximum (%d).", 876 desc, arg, result, max); 877 return ((int)result); 878 } 879 880 #define NEWFS 1 881 #define MFS_MOUNT 2 882 #define BOTH NEWFS | MFS_MOUNT 883 884 struct help_strings { 885 int flags; 886 const char *str; 887 } const help_strings[] = { 888 { NEWFS, "-B byteorder\tbyte order (`be' or `le')" }, 889 { NEWFS, "-F \t\tcreate file system image in regular file" }, 890 { BOTH, "-N \t\tdo not create file system, just print out " 891 "parameters" }, 892 { NEWFS, "-O \t\tcreate a 4.3BSD format filesystem" }, 893 { NEWFS, "-S secsize\tsector size" }, 894 #ifdef COMPAT 895 { NEWFS, "-T disktype\tdisk type" }, 896 #endif 897 { NEWFS, "-Z \t\tpre-zero the image file (with -F)" }, 898 { BOTH, "-a maxcontig\tmaximum contiguous blocks" }, 899 { BOTH, "-b bsize\tblock size" }, 900 { BOTH, "-c cpg\t\tcylinders/group" }, 901 { BOTH, "-d rotdelay\trotational delay between contiguous " 902 "blocks" }, 903 { BOTH, "-e maxbpg\tmaximum blocks per file in a cylinder group" 904 }, 905 { BOTH, "-f fsize\tfrag size" }, 906 { NEWFS, "-g avgfilesize\taverage file size" }, 907 { MFS_MOUNT, "-g groupname\tgroup name of mount point" }, 908 { BOTH, "-h avgfpdir\taverage files per directory" }, 909 { BOTH, "-i density\tnumber of bytes per inode" }, 910 { NEWFS, "-k trackskew\tsector 0 skew, per track" }, 911 { NEWFS, "-l interleave\thardware sector interleave" }, 912 { BOTH, "-m minfree\tminimum free space %%" }, 913 { NEWFS, "-n nrpos\tnumber of distinguished rotational " 914 "positions" }, 915 { BOTH, "-o optim\toptimization preference (`space' or `time')" 916 }, 917 { NEWFS, "-p tracksparse\tspare sectors per track" }, 918 { MFS_MOUNT, "-p perm\t\tpermissions (in octal)" }, 919 { BOTH, "-s fssize\tfile system size (sectors)" }, 920 { NEWFS, "-r rpm\t\trevolutions/minute" }, 921 { NEWFS, "-t ntracks\ttracks/cylinder" }, 922 { NEWFS, "-u nsectors\tsectors/track" }, 923 { MFS_MOUNT, "-u username\tuser name of mount point" }, 924 { NEWFS, "-x cylspares\tspare sectors per cylinder" }, 925 { 0, NULL } 926 }; 927 928 static void 929 usage(void) 930 { 931 int match; 932 const struct help_strings *hs; 933 934 if (mfs) { 935 fprintf(stderr, 936 "usage: %s [ fsoptions ] special-device mount-point\n", 937 getprogname()); 938 } else 939 fprintf(stderr, 940 "usage: %s [ fsoptions ] special-device%s\n", 941 getprogname(), 942 #ifdef COMPAT 943 " [device-type]"); 944 #else 945 ""); 946 #endif 947 fprintf(stderr, "where fsoptions are:\n"); 948 949 match = mfs ? MFS_MOUNT : NEWFS; 950 for (hs = help_strings; hs->flags != 0; hs++) 951 if (hs->flags & match) 952 fprintf(stderr, "\t%s\n", hs->str); 953 exit(1); 954 } 955
Indexes created Sun Sep 28 07:09:56 GMT 2025