newfs.c revision 1.60
1 /* $NetBSD: newfs.c,v 1.60 2002/09/21 18:43:39 christos 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 1.60 2002/09/21 18:43:39 christos 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_GETARGS, 90 MOPT_NOATIME, 91 { NULL }, 92 }; 93 94 static struct disklabel *getdisklabel(char *, int); 95 static void rewritelabel(char *, int, struct disklabel *); 96 static gid_t mfs_group(const char *); 97 static uid_t mfs_user(const char *); 98 static int strsuftoi(const char *, const char *, int, int); 99 static void usage(void); 100 int main(int, char *[]); 101 102 #define COMPAT /* allow non-labeled disks */ 103 104 /* 105 * The following two constants set the default block and fragment sizes. 106 * Both constants must be a power of 2 and meet the following constraints: 107 * MINBSIZE <= DESBLKSIZE <= MAXBSIZE 108 * sectorsize <= DESFRAGSIZE <= DESBLKSIZE 109 * DESBLKSIZE / DESFRAGSIZE <= 8 110 */ 111 /* 112 * For file systems smaller than SMALL_FSSIZE we use the S_DFL_* defaults, 113 * otherwise if less than MEDIUM_FSSIZE use M_DFL_*, otherwise use 114 * L_DFL_*. 115 */ 116 #define SMALL_FSSIZE (20*1024*2) 117 #define S_DFL_FRAGSIZE 512 118 #define S_DFL_BLKSIZE 4096 119 #define MEDIUM_FSSIZE (1000*1024*2) 120 #define M_DFL_FRAGSIZE 1024 121 #define M_DFL_BLKSIZE 8192 122 #define L_DFL_FRAGSIZE 2048 123 #define L_DFL_BLKSIZE 16384 124 125 /* 126 * Default sector size. 127 */ 128 #define DFL_SECSIZE 512 129 130 /* 131 * Cylinder groups may have up to many cylinders. The actual 132 * number used depends upon how much information can be stored 133 * on a single cylinder. The default is to use 16 cylinders 134 * per group. 135 */ 136 #define DESCPG 65536 /* desired fs_cpg ("infinity") */ 137 138 /* 139 * ROTDELAY gives the minimum number of milliseconds to initiate 140 * another disk transfer on the same cylinder. It is used in 141 * determining the rotationally optimal layout for disk blocks 142 * within a file; the default of fs_rotdelay is 0ms. 143 */ 144 #define ROTDELAY 0 145 146 /* 147 * MAXBLKPG determines the maximum number of data blocks which are 148 * placed in a single cylinder group. The default is one indirect 149 * block worth of data blocks. 150 */ 151 #define MAXBLKPG(bsize) ((bsize) / sizeof(daddr_t)) 152 153 /* 154 * Each file system has a number of inodes statically allocated. 155 * We allocate one inode slot per NFPI fragments, expecting this 156 * to be far more than we will ever need. 157 */ 158 #define NFPI 4 159 160 /* 161 * For each cylinder we keep track of the availability of blocks at different 162 * rotational positions, so that we can lay out the data to be picked 163 * up with minimum rotational latency. NRPOS is the default number of 164 * rotational positions that we distinguish. With NRPOS of 8 the resolution 165 * of our summary information is 2ms for a typical 3600 rpm drive. Caching 166 * and zoning pretty much defeats rotational optimization, so we now use a 167 * default of 1. 168 */ 169 #define NRPOS 1 /* number distinct rotational positions */ 170 171 172 int mfs; /* run as the memory based filesystem */ 173 int Nflag; /* run without writing file system */ 174 int Oflag; /* format as an 4.3BSD file system */ 175 int fssize; /* file system size */ 176 int ntracks; /* # tracks/cylinder */ 177 int nsectors; /* # sectors/track */ 178 int nphyssectors; /* # sectors/track including spares */ 179 int secpercyl; /* sectors per cylinder */ 180 int trackspares = -1; /* spare sectors per track */ 181 int cylspares = -1; /* spare sectors per cylinder */ 182 int sectorsize; /* bytes/sector */ 183 int rpm; /* revolutions/minute of drive */ 184 int interleave; /* hardware sector interleave */ 185 int trackskew = -1; /* sector 0 skew, per track */ 186 int fsize = 0; /* fragment size */ 187 int bsize = 0; /* block size */ 188 int cpg = DESCPG; /* cylinders/cylinder group */ 189 int cpgflg; /* cylinders/cylinder group flag was given */ 190 int minfree = MINFREE; /* free space threshold */ 191 int opt = DEFAULTOPT; /* optimization preference (space or time) */ 192 int density; /* number of bytes per inode */ 193 int maxcontig = 0; /* max contiguous blocks to allocate */ 194 int rotdelay = ROTDELAY; /* rotational delay between blocks */ 195 int maxbpg; /* maximum blocks per file in a cyl group */ 196 int nrpos = NRPOS; /* # of distinguished rotational positions */ 197 int avgfilesize = AVFILESIZ;/* expected average file size */ 198 int avgfpdir = AFPDIR; /* expected number of files per directory */ 199 int bbsize = BBSIZE; /* boot block size */ 200 int sbsize = SBSIZE; /* superblock size */ 201 int mntflags = MNT_ASYNC; /* flags to be passed to mount */ 202 u_long memleft; /* virtual memory available */ 203 caddr_t membase; /* start address of memory based filesystem */ 204 int needswap; /* Filesystem not in native byte order */ 205 #ifdef COMPAT 206 char *disktype; 207 int unlabeled; 208 #endif 209 210 char device[MAXPATHLEN]; 211 212 int 213 main(int argc, char *argv[]) 214 { 215 struct partition *pp; 216 struct disklabel *lp; 217 struct disklabel mfsfakelabel; 218 struct partition oldpartition; 219 struct statfs *mp; 220 int ch, fsi, fso, len, maxpartitions, n, Fflag, Iflag, Zflag; 221 char *cp, *endp, *s1, *s2, *special; 222 const char *opstring; 223 long long llsize; 224 int dfl_fragsize, dfl_blksize; 225 #ifdef MFS 226 char mountfromname[100]; 227 pid_t pid, res; 228 struct statfs sf; 229 int status; 230 #endif 231 mode_t mfsmode; 232 uid_t mfsuid; 233 gid_t mfsgid; 234 235 cp = NULL; 236 fsi = fso = -1; 237 Fflag = Iflag = Zflag = 0; 238 if (strstr(getprogname(), "mfs")) { 239 mfs = 1; 240 mfsmode = 01777; /* default mode for a /tmp-type directory */ 241 mfsuid = 0; /* user root */ 242 mfsgid = 0; /* group wheel */ 243 Nflag++; 244 } 245 246 maxpartitions = getmaxpartitions(); 247 if (maxpartitions > 26) 248 errx(1, "insane maxpartitions value %d", maxpartitions); 249 250 opstring = mfs ? 251 "NT:a:b:c:d:e:f:g:h:i:m:o:p:s:u:" : 252 "B:FINOS:T:Za:b:c:d:e:f:g:h:i:k:l:m:n:o:p:r:s:t:u:x:"; 253 while ((ch = getopt(argc, argv, opstring)) != -1) 254 switch (ch) { 255 case 'B': 256 if (strcmp(optarg, "be") == 0) { 257 #if BYTE_ORDER == LITTLE_ENDIAN 258 needswap = 1; 259 #endif 260 } else if (strcmp(optarg, "le") == 0) { 261 #if BYTE_ORDER == BIG_ENDIAN 262 needswap = 1; 263 #endif 264 } else 265 usage(); 266 break; 267 case 'F': 268 Fflag = 1; 269 break; 270 case 'I': 271 Iflag = 1; 272 break; 273 case 'N': 274 Nflag = 1; 275 break; 276 case 'O': 277 Oflag = 1; 278 break; 279 case 'S': 280 sectorsize = strsuftoi("sector size", 281 optarg, 1, INT_MAX); 282 break; 283 #ifdef COMPAT 284 case 'T': 285 disktype = optarg; 286 break; 287 #endif 288 case 'Z': 289 Zflag = 1; 290 break; 291 case 'a': 292 maxcontig = strsuftoi("maximum contiguous blocks", 293 optarg, 1, INT_MAX); 294 break; 295 case 'b': 296 bsize = strsuftoi("block size", 297 optarg, MINBSIZE, MAXBSIZE); 298 break; 299 case 'c': 300 cpg = strsuftoi("cylinders per group", 301 optarg, 1, INT_MAX); 302 cpgflg++; 303 break; 304 case 'd': 305 rotdelay = strsuftoi("rotational delay", 306 optarg, 0, INT_MAX); 307 break; 308 case 'e': 309 maxbpg = strsuftoi( 310 "blocks per file in a cylinder group", 311 optarg, 1, INT_MAX); 312 break; 313 case 'f': 314 fsize = strsuftoi("fragment size", 315 optarg, 1, MAXBSIZE); 316 break; 317 case 'g': 318 if (mfs) 319 mfsgid = mfs_group(optarg); 320 else { 321 avgfilesize = strsuftoi("average file size", 322 optarg, 1, INT_MAX); 323 } 324 break; 325 case 'h': 326 avgfpdir = strsuftoi("expected files per directory", 327 optarg, 1, INT_MAX); 328 break; 329 case 'i': 330 density = strsuftoi("bytes per inode", 331 optarg, 1, INT_MAX); 332 break; 333 case 'k': 334 trackskew = strsuftoi("track skew", 335 optarg, 0, INT_MAX); 336 break; 337 case 'l': 338 interleave = strsuftoi("interleave", 339 optarg, 1, INT_MAX); 340 break; 341 case 'm': 342 minfree = strsuftoi("free space %", 343 optarg, 0, 99); 344 break; 345 case 'n': 346 nrpos = strsuftoi("rotational layout count", 347 optarg, 1, INT_MAX); 348 break; 349 case 'o': 350 if (mfs) 351 getmntopts(optarg, mopts, &mntflags, 0); 352 else { 353 if (strcmp(optarg, "space") == 0) 354 opt = FS_OPTSPACE; 355 else if (strcmp(optarg, "time") == 0) 356 opt = FS_OPTTIME; 357 else 358 errx(1, "%s %s", 359 "unknown optimization preference: ", 360 "use `space' or `time'."); 361 } 362 break; 363 case 'p': 364 if (mfs) { 365 if ((mfsmode = strtol(optarg, NULL, 8)) <= 0) 366 errx(1, "bad mode `%s'", optarg); 367 } else { 368 trackspares = strsuftoi( 369 "spare sectors per track", optarg, 0, 370 INT_MAX); 371 } 372 break; 373 case 'r': 374 rpm = strsuftoi("revolutions per minute", 375 optarg, 1, INT_MAX); 376 break; 377 case 's': 378 llsize = strtoll(optarg, &endp, 10); 379 if (endp[0] != '\0' && endp[1] != '\0') 380 llsize = -1; 381 else { 382 int ssiz; 383 384 ssiz = (sectorsize ? sectorsize : DFL_SECSIZE); 385 switch (tolower((unsigned char)endp[0])) { 386 case 'b': 387 llsize /= ssiz; 388 break; 389 case 'k': 390 llsize *= 1024 / ssiz; 391 break; 392 case 'm': 393 llsize *= 1024 * 1024 / ssiz; 394 break; 395 case 'g': 396 llsize *= 1024 * 1024 * 1024 / ssiz; 397 break; 398 case '\0': 399 case 's': 400 break; 401 default: 402 llsize = -1; 403 } 404 } 405 if (llsize > INT_MAX) 406 errx(1, "file system size `%s' is too large.", 407 optarg); 408 if (llsize <= 0) 409 errx(1, 410 "`%s' is not a valid number for file system size.", 411 optarg); 412 fssize = (int)llsize; 413 break; 414 case 't': 415 ntracks = strsuftoi("total tracks", 416 optarg, 1, INT_MAX); 417 break; 418 case 'u': 419 if (mfs) 420 mfsuid = mfs_user(optarg); 421 else { 422 nsectors = strsuftoi("sectors per track", 423 optarg, 1, INT_MAX); 424 } 425 break; 426 case 'x': 427 cylspares = strsuftoi("spare sectors per cylinder", 428 optarg, 0, INT_MAX); 429 break; 430 case '?': 431 default: 432 usage(); 433 } 434 argc -= optind; 435 argv += optind; 436 if (mntflags & MNT_GETARGS) 437 goto doit; 438 439 if (argc != 2 && (mfs || argc != 1)) 440 usage(); 441 442 special = argv[0]; 443 if (Fflag || mfs) { 444 /* 445 * it's a file system image or an MFS, so fake up a label. 446 * XXX 447 */ 448 if (!sectorsize) 449 sectorsize = DFL_SECSIZE; 450 451 if (Fflag && !Nflag) { /* creating image in a regular file */ 452 if (fssize == 0) 453 errx(1, "need to specify size when using -F"); 454 fso = open(special, O_RDWR | O_CREAT | O_TRUNC, 0777); 455 if (fso == -1) 456 err(1, "can't open file %s", special); 457 if ((fsi = dup(fso)) == -1) 458 err(1, "can't dup(2) image fd"); 459 /* XXXLUKEM: only ftruncate() regular files ? */ 460 if (ftruncate(fso, (off_t)fssize * sectorsize) == -1) 461 err(1, "can't resize %s to %d", 462 special, fssize); 463 464 if (Zflag) { /* pre-zero the file */ 465 char *buf; 466 int bufsize, i; 467 off_t bufrem; 468 struct statfs sfs; 469 470 if (fstatfs(fso, &sfs) == -1) { 471 warn("can't fstatfs `%s'", special); 472 bufsize = 8192; 473 } else 474 bufsize = sfs.f_iosize; 475 476 if ((buf = calloc(1, bufsize)) == NULL) 477 err(1, "can't malloc buffer of %d", 478 bufsize); 479 bufrem = fssize * sectorsize; 480 printf( 481 "Creating file system image in `%s', size %lld bytes, in %d byte chunks.\n", 482 special, (long long)bufrem, bufsize); 483 while (bufrem > 0) { 484 i = write(fso, buf, 485 MIN(bufsize, bufrem)); 486 if (i == -1) 487 err(1, "writing image"); 488 bufrem -= i; 489 } 490 } 491 492 } 493 494 memset(&mfsfakelabel, 0, sizeof(mfsfakelabel)); 495 mfsfakelabel.d_secsize = sectorsize; 496 mfsfakelabel.d_nsectors = 64; /* these 3 add up to 16MB */ 497 mfsfakelabel.d_ntracks = 16; 498 mfsfakelabel.d_ncylinders = 16; 499 mfsfakelabel.d_secpercyl = 500 mfsfakelabel.d_nsectors * mfsfakelabel.d_ntracks; 501 mfsfakelabel.d_secperunit = 502 mfsfakelabel.d_ncylinders * mfsfakelabel.d_secpercyl; 503 mfsfakelabel.d_rpm = 10000; 504 mfsfakelabel.d_interleave = 1; 505 mfsfakelabel.d_npartitions = 1; 506 mfsfakelabel.d_partitions[0].p_size = mfsfakelabel.d_secperunit; 507 mfsfakelabel.d_partitions[0].p_fsize = 1024; 508 mfsfakelabel.d_partitions[0].p_frag = 8; 509 mfsfakelabel.d_partitions[0].p_cpg = 16; 510 511 lp = &mfsfakelabel; 512 pp = &mfsfakelabel.d_partitions[0]; 513 } else { /* !Fflag && !mfs */ 514 fsi = opendisk(special, O_RDONLY, device, sizeof(device), 0); 515 special = device; 516 if (fsi < 0) 517 err(1, "%s: open for read", special); 518 519 if (Nflag) { 520 fso = -1; 521 } else { 522 fso = open(special, O_WRONLY); 523 if (fso < 0) 524 err(1, "%s: open for write", special); 525 526 /* Bail if target special is mounted */ 527 n = getmntinfo(&mp, MNT_NOWAIT); 528 if (n == 0) 529 err(1, "%s: getmntinfo", special); 530 531 len = sizeof(_PATH_DEV) - 1; 532 s1 = special; 533 if (strncmp(_PATH_DEV, s1, len) == 0) 534 s1 += len; 535 536 while (--n >= 0) { 537 s2 = mp->f_mntfromname; 538 if (strncmp(_PATH_DEV, s2, len) == 0) { 539 s2 += len - 1; 540 *s2 = 'r'; 541 } 542 if (strcmp(s1, s2) == 0 || 543 strcmp(s1, &s2[1]) == 0) 544 errx(1, "%s is mounted on %s", 545 special, mp->f_mntonname); 546 ++mp; 547 } 548 } 549 cp = strchr(argv[0], '\0') - 1; 550 if (cp == 0 || ((*cp < 'a' || *cp > ('a' + maxpartitions - 1)) 551 && !isdigit(*cp))) 552 errx(1, "can't figure out file system partition"); 553 #ifdef COMPAT 554 if (disktype == NULL) 555 disktype = argv[1]; 556 #endif 557 lp = getdisklabel(special, fsi); 558 if (isdigit(*cp)) 559 pp = &lp->d_partitions[0]; 560 else 561 pp = &lp->d_partitions[*cp - 'a']; 562 if (pp->p_size == 0) 563 errx(1, "`%c' partition is unavailable", *cp); 564 if (!Iflag && pp->p_fstype != FS_BSDFFS) 565 errx(1, "`%c' partition type is not `4.2BSD'", *cp); 566 } /* !Fflag && !mfs */ 567 568 if (fssize == 0) 569 fssize = pp->p_size; 570 if (fssize > pp->p_size && !mfs && !Fflag) 571 errx(1, "maximum file system size on the `%c' partition is %d", 572 *cp, pp->p_size); 573 if (rpm == 0) { 574 rpm = lp->d_rpm; 575 if (rpm <= 0) 576 rpm = 3600; 577 } 578 if (ntracks == 0) { 579 ntracks = lp->d_ntracks; 580 if (ntracks <= 0) 581 errx(1, "no default #tracks"); 582 } 583 if (nsectors == 0) { 584 nsectors = lp->d_nsectors; 585 if (nsectors <= 0) 586 errx(1, "no default #sectors/track"); 587 } 588 if (sectorsize == 0) { 589 sectorsize = lp->d_secsize; 590 if (sectorsize <= 0) 591 errx(1, "no default sector size"); 592 } 593 if (trackskew == -1) { 594 trackskew = lp->d_trackskew; 595 if (trackskew < 0) 596 trackskew = 0; 597 } 598 if (interleave == 0) { 599 interleave = lp->d_interleave; 600 if (interleave <= 0) 601 interleave = 1; 602 } 603 604 if (fssize < SMALL_FSSIZE) { 605 dfl_fragsize = S_DFL_FRAGSIZE; 606 dfl_blksize = S_DFL_BLKSIZE; 607 } else if (fssize < MEDIUM_FSSIZE) { 608 dfl_fragsize = M_DFL_FRAGSIZE; 609 dfl_blksize = M_DFL_BLKSIZE; 610 } else { 611 dfl_fragsize = L_DFL_FRAGSIZE; 612 dfl_blksize = L_DFL_BLKSIZE; 613 } 614 615 if (fsize == 0) { 616 fsize = pp->p_fsize; 617 if (fsize <= 0) 618 fsize = MAX(dfl_fragsize, lp->d_secsize); 619 } 620 if (bsize == 0) { 621 bsize = pp->p_frag * pp->p_fsize; 622 if (bsize <= 0) 623 bsize = MIN(dfl_blksize, 8 * fsize); 624 } 625 /* 626 * Maxcontig sets the default for the maximum number of blocks 627 * that may be allocated sequentially. With filesystem clustering 628 * it is possible to allocate contiguous blocks up to the maximum 629 * transfer size permitted by the controller or buffering. 630 */ 631 if (maxcontig == 0) 632 maxcontig = MAX(1, MIN(MAXPHYS, MAXBSIZE) / bsize); 633 if (density == 0) 634 density = NFPI * fsize; 635 if (minfree < MINFREE && opt != FS_OPTSPACE) { 636 warnx("%s %s %d%%", "Warning: changing optimization to space", 637 "because minfree is less than", MINFREE); 638 opt = FS_OPTSPACE; 639 } 640 if (trackspares == -1) { 641 trackspares = lp->d_sparespertrack; 642 if (trackspares < 0) 643 trackspares = 0; 644 } 645 nphyssectors = nsectors + trackspares; 646 if (cylspares == -1) { 647 cylspares = lp->d_sparespercyl; 648 if (cylspares < 0) 649 cylspares = 0; 650 } 651 secpercyl = nsectors * ntracks - cylspares; 652 if (secpercyl != lp->d_secpercyl) 653 warnx("%s (%d) %s (%u)", 654 "Warning: calculated sectors per cylinder", secpercyl, 655 "disagrees with disk label", lp->d_secpercyl); 656 if (maxbpg == 0) 657 maxbpg = MAXBLKPG(bsize); 658 #ifdef notdef /* label may be 0 if faked up by kernel */ 659 bbsize = lp->d_bbsize; 660 sbsize = lp->d_sbsize; 661 #endif 662 oldpartition = *pp; 663 mkfs(pp, special, fsi, fso, mfsmode, mfsuid, mfsgid); 664 if (!Nflag && memcmp(pp, &oldpartition, sizeof(oldpartition)) && !Fflag) 665 rewritelabel(special, fso, lp); 666 if (!Nflag) 667 close(fso); 668 close(fsi); 669 #ifdef MFS 670 if (mfs) { 671 struct mfs_args args; 672 673 switch (pid = fork()) { 674 case -1: 675 perror("mfs"); 676 exit(10); 677 case 0: 678 (void)snprintf(mountfromname, sizeof(mountfromname), 679 "mfs:%d", getpid()); 680 break; 681 default: 682 (void)snprintf(mountfromname, sizeof(mountfromname), 683 "mfs:%d", pid); 684 for (;;) { 685 /* 686 * spin until the mount succeeds 687 * or the child exits 688 */ 689 usleep(1); 690 691 /* 692 * XXX Here is a race condition: another process 693 * can mount a filesystem which hides our 694 * ramdisk before we see the success. 695 */ 696 if (statfs(argv[1], &sf) < 0) 697 err(88, "statfs %s", argv[1]); 698 if (!strcmp(sf.f_mntfromname, mountfromname) && 699 !strncmp(sf.f_mntonname, argv[1], 700 MNAMELEN) && 701 !strcmp(sf.f_fstypename, "mfs")) 702 exit(0); 703 704 res = waitpid(pid, &status, WNOHANG); 705 if (res == -1) 706 err(11, "waitpid"); 707 if (res != pid) 708 continue; 709 if (WIFEXITED(status)) { 710 if (WEXITSTATUS(status) == 0) 711 exit(0); 712 errx(1, "%s: mount: %s", argv[1], 713 strerror(WEXITSTATUS(status))); 714 } else 715 errx(11, "abnormal termination"); 716 } 717 /* NOTREACHED */ 718 } 719 720 (void) setsid(); 721 (void) close(0); 722 (void) close(1); 723 (void) close(2); 724 (void) chdir("/"); 725 726 args.fspec = mountfromname; 727 args.export.ex_root = -2; 728 if (mntflags & MNT_RDONLY) 729 args.export.ex_flags = MNT_EXRDONLY; 730 else 731 args.export.ex_flags = 0; 732 args.base = membase; 733 args.size = fssize * sectorsize; 734 doit: 735 if (mount(MOUNT_MFS, argv[1], mntflags, &args) < 0) { 736 if (mntflags & MNT_GETARGS) 737 err(1, "mount `%s' failed", argv[1]); 738 exit(errno); /* parent prints message */ 739 } 740 if (mntflags & MNT_GETARGS) 741 printf("base=%p, size=%ld\n", args.base, args.size); 742 } 743 #endif 744 exit(0); 745 } 746 747 #ifdef COMPAT 748 const char lmsg[] = "%s: can't read disk label; disk type must be specified"; 749 #else 750 const char lmsg[] = "%s: can't read disk label"; 751 #endif 752 753 static struct disklabel * 754 getdisklabel(char *s, volatile int fd) 755 /* XXX why is fs volatile?! */ 756 { 757 static struct disklabel lab; 758 759 if (ioctl(fd, DIOCGDINFO, &lab) < 0) { 760 #ifdef COMPAT 761 if (disktype) { 762 struct disklabel *lp; 763 764 unlabeled++; 765 lp = getdiskbyname(disktype); 766 if (lp == NULL) 767 errx(1, "%s: unknown disk type", disktype); 768 return (lp); 769 } 770 #endif 771 warn("ioctl (GDINFO)"); 772 errx(1, lmsg, s); 773 } 774 return (&lab); 775 } 776 777 static void 778 rewritelabel(char *s, volatile int fd, struct disklabel *lp) 779 /* XXX why is fd volatile?! */ 780 { 781 #ifdef COMPAT 782 if (unlabeled) 783 return; 784 #endif 785 lp->d_checksum = 0; 786 lp->d_checksum = dkcksum(lp); 787 if (ioctl(fd, DIOCWDINFO, (char *)lp) < 0) { 788 if (errno == ESRCH) 789 return; 790 warn("ioctl (WDINFO)"); 791 errx(1, "%s: can't rewrite disk label", s); 792 } 793 #if __vax__ 794 if (lp->d_type == DTYPE_SMD && lp->d_flags & D_BADSECT) { 795 int i; 796 int cfd; 797 daddr_t alt; 798 char specname[64]; 799 char blk[1024]; 800 char *cp; 801 802 /* 803 * Make name for 'c' partition. 804 */ 805 strcpy(specname, s); 806 cp = specname + strlen(specname) - 1; 807 if (!isdigit(*cp)) 808 *cp = 'c'; 809 cfd = open(specname, O_WRONLY); 810 if (cfd < 0) 811 err(1, "%s: open", specname); 812 memset(blk, 0, sizeof(blk)); 813 *(struct disklabel *)(blk + LABELOFFSET) = *lp; 814 alt = lp->d_ncylinders * lp->d_secpercyl - lp->d_nsectors; 815 for (i = 1; i < 11 && i < lp->d_nsectors; i += 2) { 816 off_t offset; 817 818 offset = alt + i; 819 offset *= lp->d_secsize; 820 if (lseek(cfd, offset, SEEK_SET) == -1) 821 err(1, "lseek to badsector area: "); 822 if (write(cfd, blk, lp->d_secsize) < lp->d_secsize) 823 warn("alternate label %d write", i/2); 824 } 825 close(cfd); 826 } 827 #endif 828 } 829 830 static gid_t 831 mfs_group(const char *gname) 832 { 833 struct group *gp; 834 835 if (!(gp = getgrnam(gname)) && !isdigit((unsigned char)*gname)) 836 errx(1, "unknown gname %s", gname); 837 return gp ? gp->gr_gid : atoi(gname); 838 } 839 840 static uid_t 841 mfs_user(const char *uname) 842 { 843 struct passwd *pp; 844 845 if (!(pp = getpwnam(uname)) && !isdigit((unsigned char)*uname)) 846 errx(1, "unknown user %s", uname); 847 return pp ? pp->pw_uid : atoi(uname); 848 } 849 850 static int 851 strsuftoi(const char *desc, const char *arg, int min, int max) 852 { 853 long long result; 854 char *ep; 855 856 errno = 0; 857 result = strtoll(arg, &ep, 10); 858 if (ep[0] != '\0' && ep[1] != '\0') 859 errx(1, "%s `%s' is not a valid number.", desc, arg); 860 switch (tolower((unsigned char)ep[0])) { 861 case '\0': 862 case 'b': 863 break; 864 case 'k': 865 result <<= 10; 866 break; 867 case 'm': 868 result <<= 20; 869 break; 870 case 'g': 871 result <<= 30; 872 break; 873 default: 874 errx(1, "`%s' is not a valid suffix for %s.", ep, desc); 875 } 876 if (result < min) 877 errx(1, "%s `%s' (%lld) is less than minimum (%d).", 878 desc, arg, result, min); 879 if (result > max) 880 errx(1, "%s `%s' (%lld) is greater than maximum (%d).", 881 desc, arg, result, max); 882 return ((int)result); 883 } 884 885 #define NEWFS 1 886 #define MFS_MOUNT 2 887 #define BOTH NEWFS | MFS_MOUNT 888 889 struct help_strings { 890 int flags; 891 const char *str; 892 } const help_strings[] = { 893 { NEWFS, "-B byteorder\tbyte order (`be' or `le')" }, 894 { NEWFS, "-F \t\tcreate file system image in regular file" }, 895 { NEWFS, "-I \t\tdo not check that the file system type is '4.2BSD'" }, 896 { BOTH, "-N \t\tdo not create file system, just print out " 897 "parameters" }, 898 { NEWFS, "-O \t\tcreate a 4.3BSD format filesystem" }, 899 { NEWFS, "-S secsize\tsector size" }, 900 #ifdef COMPAT 901 { NEWFS, "-T disktype\tdisk type" }, 902 #endif 903 { NEWFS, "-Z \t\tpre-zero the image file (with -F)" }, 904 { BOTH, "-a maxcontig\tmaximum contiguous blocks" }, 905 { BOTH, "-b bsize\tblock size" }, 906 { BOTH, "-c cpg\t\tcylinders/group" }, 907 { BOTH, "-d rotdelay\trotational delay between contiguous " 908 "blocks" }, 909 { BOTH, "-e maxbpg\tmaximum blocks per file in a cylinder group" 910 }, 911 { BOTH, "-f fsize\tfrag size" }, 912 { NEWFS, "-g avgfilesize\taverage file size" }, 913 { MFS_MOUNT, "-g groupname\tgroup name of mount point" }, 914 { BOTH, "-h avgfpdir\taverage files per directory" }, 915 { BOTH, "-i density\tnumber of bytes per inode" }, 916 { NEWFS, "-k trackskew\tsector 0 skew, per track" }, 917 { NEWFS, "-l interleave\thardware sector interleave" }, 918 { BOTH, "-m minfree\tminimum free space %%" }, 919 { NEWFS, "-n nrpos\tnumber of distinguished rotational " 920 "positions" }, 921 { BOTH, "-o optim\toptimization preference (`space' or `time')" 922 }, 923 { NEWFS, "-p tracksparse\tspare sectors per track" }, 924 { MFS_MOUNT, "-p perm\t\tpermissions (in octal)" }, 925 { BOTH, "-s fssize\tfile system size (sectors)" }, 926 { NEWFS, "-r rpm\t\trevolutions/minute" }, 927 { NEWFS, "-t ntracks\ttracks/cylinder" }, 928 { NEWFS, "-u nsectors\tsectors/track" }, 929 { MFS_MOUNT, "-u username\tuser name of mount point" }, 930 { NEWFS, "-x cylspares\tspare sectors per cylinder" }, 931 { 0, NULL } 932 }; 933 934 static void 935 usage(void) 936 { 937 int match; 938 const struct help_strings *hs; 939 940 if (mfs) { 941 fprintf(stderr, 942 "usage: %s [ fsoptions ] special-device mount-point\n", 943 getprogname()); 944 } else 945 fprintf(stderr, 946 "usage: %s [ fsoptions ] special-device%s\n", 947 getprogname(), 948 #ifdef COMPAT 949 " [device-type]"); 950 #else 951 ""); 952 #endif 953 fprintf(stderr, "where fsoptions are:\n"); 954 955 match = mfs ? MFS_MOUNT : NEWFS; 956 for (hs = help_strings; hs->flags != 0; hs++) 957 if (hs->flags & match) 958 fprintf(stderr, "\t%s\n", hs->str); 959 exit(1); 960 } 961
Indexes created Mon Sep 29 21:09:56 GMT 2025