sbin/newfs/newfs.c

   1 /*
   2  * Copyright (c) 1983, 1989, 1993, 1994
   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  * @(#) Copyright (c) 1983, 1989, 1993, 1994 The Regents of the University of California.  All rights reserved.
  34  * @(#)newfs.c  8.13 (Berkeley) 5/1/95
  35  * $FreeBSD: src/sbin/newfs/newfs.c,v 1.30.2.9 2003/05/13 12:03:55 joerg Exp $
  36  * $DragonFly: src/sbin/newfs/newfs.c,v 1.10 2004/06/26 22:54:01 dillon Exp $
  37  */
  38
  39 /*
  40  * newfs: friendly front end to mkfs
  41  */
  42 #include <sys/param.h>
  43 #include <sys/stat.h>
  44 #include <sys/disklabel.h>
  45 #include <sys/file.h>
  46 #include <sys/mount.h>
  47
  48 #include <vfs/ufs/dir.h>
  49 #include <vfs/ufs/dinode.h>
  50 #include <vfs/ufs/fs.h>
  51 #include <vfs/ufs/ufsmount.h>
  52
  53 #include <ctype.h>
  54 #include <err.h>
  55 #include <errno.h>
  56 #include <paths.h>
  57 #include <stdio.h>
  58 #include <stdlib.h>
  59 #include <string.h>
  60 #include <syslog.h>
  61 #include <unistd.h>
  62
  63 #ifdef MFS
  64 #include <sys/types.h>
  65 #include <sys/mman.h>
  66 #endif
  67
  68 #if __STDC__
  69 #include <stdarg.h>
  70 #else
  71 #include <varargs.h>
  72 #endif
  73
  74 #include "mntopts.h"
  75 #include "defs.h"
  76
  77 struct mntopt mopts[] = {
  78         MOPT_STDOPTS,
  79         MOPT_ASYNC,
  80         { NULL },
  81 };
  82
  83 void    fatal(const char *fmt, ...);
  84
  85 #define COMPAT                  /* allow non-labeled disks */
  86
  87 /*
  88  * The following two constants set the default block and fragment sizes.
  89  * Both constants must be a power of 2 and meet the following constraints:
  90  *      MINBSIZE <= DESBLKSIZE <= MAXBSIZE
  91  *      sectorsize <= DESFRAGSIZE <= DESBLKSIZE
  92  *      DESBLKSIZE / DESFRAGSIZE <= 8
  93  */
  94 #define DFL_FRAGSIZE    2048
  95 #define DFL_BLKSIZE     16384
  96
  97 /*
  98  * Cylinder groups may have up to many cylinders. The actual
  99  * number used depends upon how much information can be stored
 100  * on a single cylinder. The default is to use as many as possible
 101  * cylinders per group.
 102  */
 103 #define DESCPG          65536   /* desired fs_cpg ("infinity") */
 104
 105 /*
 106  * Once upon a time...
 107  *    ROTDELAY gives the minimum number of milliseconds to initiate
 108  *    another disk transfer on the same cylinder. It is used in
 109  *    determining the rotationally optimal layout for disk blocks
 110  *    within a file; the default of fs_rotdelay is 4ms.
 111  *
 112  * ...but now we make this 0 to disable the rotdelay delay because
 113  * modern drives with read/write-behind achieve higher performance
 114  * without the delay.
 115  */
 116 #define ROTDELAY        0
 117
 118 /*
 119  * MAXBLKPG determines the maximum number of data blocks which are
 120  * placed in a single cylinder group. The default is one indirect
 121  * block worth of data blocks.
 122  */
 123 #define MAXBLKPG(bsize) ((bsize) / sizeof(daddr_t))
 124
 125 /*
 126  * Each file system has a number of inodes statically allocated.
 127  * We allocate one inode slot per NFPI fragments, expecting this
 128  * to be far more than we will ever need.
 129  */
 130 #define NFPI            4
 131
 132 /*
 133  * Once upon a time...
 134  *    For each cylinder we keep track of the availability of blocks at different
 135  *    rotational positions, so that we can lay out the data to be picked
 136  *    up with minimum rotational latency.  NRPOS is the default number of
 137  *    rotational positions that we distinguish.  With NRPOS of 8 the resolution
 138  *    of our summary information is 2ms for a typical 3600 rpm drive.
 139  *
 140  * ...but now we make this 1 (which essentially disables the rotational
 141  * position table because modern drives with read-ahead and write-behind do
 142  * better without the rotational position table.
 143  */
 144 #define NRPOS           1       /* number distinct rotational positions */
 145
 146 /*
 147  * About the same time as the above, we knew what went where on the disks.
 148  * no longer so, so kill the code which finds the different platters too...
 149  * We do this by saying one head, with a lot of sectors on it.
 150  * The number of sectors are used to determine the size of a cyl-group.
 151  * Kirk suggested one or two meg per "cylinder" so we say two.
 152  */
 153 #define NTRACKS         1       /* number of heads */
 154 #define NSECTORS        4096    /* number of sectors */
 155
 156 int     mfs;                    /* run as the memory based filesystem */
 157 char    *mfs_mtpt;              /* mount point for mfs          */
 158 struct stat mfs_mtstat;         /* stat prior to mount          */
 159 int     Nflag;                  /* run without writing file system */
 160 int     Oflag;                  /* format as an 4.3BSD file system */
 161 int     Cflag;                  /* copy underlying filesystem (mfs only) */
 162 int     Uflag;                  /* enable soft updates for file system */
 163 int     fssize;                 /* file system size */
 164 int     ntracks = NTRACKS;      /* # tracks/cylinder */
 165 int     nsectors = NSECTORS;    /* # sectors/track */
 166 int     nphyssectors;           /* # sectors/track including spares */
 167 int     secpercyl;              /* sectors per cylinder */
 168 int     trackspares = -1;       /* spare sectors per track */
 169 int     cylspares = -1;         /* spare sectors per cylinder */
 170 int     sectorsize;             /* bytes/sector */
 171 int     realsectorsize;         /* bytes/sector in hardware */
 172 int     rpm;                    /* revolutions/minute of drive */
 173 int     interleave;             /* hardware sector interleave */
 174 int     trackskew = -1;         /* sector 0 skew, per track */
 175 int     headswitch;             /* head switch time, usec */
 176 int     trackseek;              /* track-to-track seek, usec */
 177 int     fsize = 0;              /* fragment size */
 178 int     bsize = 0;              /* block size */
 179 int     cpg = DESCPG;           /* cylinders/cylinder group */
 180 int     cpgflg;                 /* cylinders/cylinder group flag was given */
 181 int     minfree = MINFREE;      /* free space threshold */
 182 int     opt = DEFAULTOPT;       /* optimization preference (space or time) */
 183 int     density;                /* number of bytes per inode */
 184 int     maxcontig = 0;          /* max contiguous blocks to allocate */
 185 int     rotdelay = ROTDELAY;    /* rotational delay between blocks */
 186 int     maxbpg;                 /* maximum blocks per file in a cyl group */
 187 int     nrpos = NRPOS;          /* # of distinguished rotational positions */
 188 int     avgfilesize = AVFILESIZ;/* expected average file size */
 189 int     avgfilesperdir = AFPDIR;/* expected number of files per directory */
 190 int     bbsize = BBSIZE;        /* boot block size */
 191 int     sbsize = SBSIZE;        /* superblock size */
 192 int     mntflags = MNT_ASYNC;   /* flags to be passed to mount */
 193 int     t_or_u_flag = 0;        /* user has specified -t or -u */
 194 u_long  memleft;                /* virtual memory available */
 195 caddr_t membase;                /* start address of memory based filesystem */
 196 char    *filename;
 197 #ifdef COMPAT
 198 char    *disktype;
 199 int     unlabeled;
 200 #endif
 201
 202 char    device[MAXPATHLEN];
 203 char    mfsdevname[256];
 204 char    *progname;
 205
 206 struct disklabel *getdisklabel(char *, int);
 207 static void rewritelabel(char *, int, struct disklabel *);
 208 static void usage(void);
 209 static void mfsintr(int signo);
 210
 211 int
 212 main(int argc, char **argv)
 213 {
 214         register int ch;
 215         register struct partition *pp;
 216         register struct disklabel *lp;
 217         struct disklabel mfsfakelabel;
 218         struct disklabel *getdisklabel();
 219         struct partition oldpartition;
 220         struct stat st;
 221         struct statfs *mp;
 222         int fsi = 0, fso, len, n, vflag;
 223         char *cp = NULL, *s1, *s2, *special, *opstring;
 224 #ifdef MFS
 225         struct vfsconf vfc;
 226         int error;
 227 #endif
 228
 229         vflag = 0;
 230         if ((progname = strrchr(*argv, '/')))
 231                 ++progname;
 232         else
 233                 progname = *argv;
 234
 235         if (strstr(progname, "mfs")) {
 236                 mfs = 1;
 237                 Nflag++;
 238         }
 239
 240         opstring = mfs ?
 241             "NCF:T:Ua:b:c:d:e:f:g:h:i:m:o:s:v" :
 242             "NOS:T:Ua:b:c:d:e:f:g:h:i:k:l:m:n:o:p:r:s:t:u:vx:";
 243         while ((ch = getopt(argc, argv, opstring)) != -1)
 244                 switch (ch) {
 245                 case 'N':
 246                         Nflag = 1;
 247                         break;
 248                 case 'O':
 249                         Oflag = 1;
 250                         break;
 251                 case 'C':
 252                         Cflag = 1;      /* MFS only */
 253                         break;
 254                 case 'S':
 255                         if ((sectorsize = atoi(optarg)) <= 0)
 256                                 fatal("%s: bad sector size", optarg);
 257                         break;
 258 #ifdef COMPAT
 259                 case 'T':
 260                         disktype = optarg;
 261                         break;
 262 #endif
 263                 case 'F':
 264                         filename = optarg;
 265                         break;
 266                 case 'U':
 267                         Uflag = 1;
 268                         break;
 269                 case 'a':
 270                         if ((maxcontig = atoi(optarg)) <= 0)
 271                                 fatal("%s: bad maximum contiguous blocks",
 272                                     optarg);
 273                         break;
 274                 case 'b':
 275                         if ((bsize = atoi(optarg)) < MINBSIZE)
 276                                 fatal("%s: bad block size", optarg);
 277                         break;
 278                 case 'c':
 279                         if ((cpg = atoi(optarg)) <= 0)
 280                                 fatal("%s: bad cylinders/group", optarg);
 281                         cpgflg++;
 282                         break;
 283                 case 'd':
 284                         if ((rotdelay = atoi(optarg)) < 0)
 285                                 fatal("%s: bad rotational delay", optarg);
 286                         break;
 287                 case 'e':
 288                         if ((maxbpg = atoi(optarg)) <= 0)
 289                 fatal("%s: bad blocks per file in a cylinder group",
 290                                     optarg);
 291                         break;
 292                 case 'f':
 293                         if ((fsize = atoi(optarg)) <= 0)
 294                                 fatal("%s: bad fragment size", optarg);
 295                         break;
 296                 case 'g':
 297                         if ((avgfilesize = atoi(optarg)) <= 0)
 298                                 fatal("%s: bad average file size", optarg);
 299                         break;
 300                 case 'h':
 301                         if ((avgfilesperdir = atoi(optarg)) <= 0)
 302                                 fatal("%s: bad average files per dir", optarg);
 303                         break;
 304                 case 'i':
 305                         if ((density = atoi(optarg)) <= 0)
 306                                 fatal("%s: bad bytes per inode", optarg);
 307                         break;
 308                 case 'k':
 309                         if ((trackskew = atoi(optarg)) < 0)
 310                                 fatal("%s: bad track skew", optarg);
 311                         break;
 312                 case 'l':
 313                         if ((interleave = atoi(optarg)) <= 0)
 314                                 fatal("%s: bad interleave", optarg);
 315                         break;
 316                 case 'm':
 317                         if ((minfree = atoi(optarg)) < 0 || minfree > 99)
 318                                 fatal("%s: bad free space %%", optarg);
 319                         break;
 320                 case 'n':
 321                         if ((nrpos = atoi(optarg)) < 0)
 322                                 fatal("%s: bad rotational layout count",
 323                                     optarg);
 324                         if (nrpos == 0)
 325                                 nrpos = 1;
 326                         break;
 327                 case 'o':
 328                         if (mfs)
 329                                 getmntopts(optarg, mopts, &mntflags, 0);
 330                         else {
 331                                 if (strcmp(optarg, "space") == 0)
 332                                         opt = FS_OPTSPACE;
 333                                 else if (strcmp(optarg, "time") == 0)
 334                                         opt = FS_OPTTIME;
 335                                 else
 336         fatal("%s: unknown optimization preference: use `space' or `time'", optarg);
 337                         }
 338                         break;
 339                 case 'p':
 340                         if ((trackspares = atoi(optarg)) < 0)
 341                                 fatal("%s: bad spare sectors per track",
 342                                     optarg);
 343                         break;
 344                 case 'r':
 345                         if ((rpm = atoi(optarg)) <= 0)
 346                                 fatal("%s: bad revolutions/minute", optarg);
 347                         break;
 348                 case 's':
 349                         if ((fssize = atoi(optarg)) <= 0)
 350                                 fatal("%s: bad file system size", optarg);
 351                         break;
 352                 case 't':
 353                         t_or_u_flag++;
 354                         if ((ntracks = atoi(optarg)) < 0)
 355                                 fatal("%s: bad total tracks", optarg);
 356                         break;
 357                 case 'u':
 358                         t_or_u_flag++;
 359                         if ((nsectors = atoi(optarg)) < 0)
 360                                 fatal("%s: bad sectors/track", optarg);
 361                         break;
 362                 case 'v':
 363                         vflag = 1;
 364                         break;
 365                 case 'x':
 366                         if ((cylspares = atoi(optarg)) < 0)
 367                                 fatal("%s: bad spare sectors per cylinder",
 368                                     optarg);
 369                         break;
 370                 case '?':
 371                 default:
 372                         usage();
 373                 }
 374         argc -= optind;
 375         argv += optind;
 376
 377         if (argc != 2 && (mfs || argc != 1))
 378                 usage();
 379
 380         special = argv[0];
 381         /* Copy the NetBSD way of faking up a disk label */
 382         if (mfs && !strcmp(special, "swap")) {
 383                 /*
 384                  * it's an MFS, mounted on "swap."  fake up a label.
 385                  * XXX XXX XXX
 386                  */
 387                 fso = -1;       /* XXX; normally done below. */
 388
 389                 memset(&mfsfakelabel, 0, sizeof(mfsfakelabel));
 390                 mfsfakelabel.d_secsize = 512;
 391                 mfsfakelabel.d_nsectors = 64;
 392                 mfsfakelabel.d_ntracks = 16;
 393                 mfsfakelabel.d_ncylinders = 16;
 394                 mfsfakelabel.d_secpercyl = 1024;
 395                 mfsfakelabel.d_secperunit = 16384;
 396                 mfsfakelabel.d_rpm = 3600;
 397                 mfsfakelabel.d_interleave = 1;
 398                 mfsfakelabel.d_npartitions = 1;
 399                 mfsfakelabel.d_partitions[0].p_size = 16384;
 400                 mfsfakelabel.d_partitions[0].p_fsize = 1024;
 401                 mfsfakelabel.d_partitions[0].p_frag = 8;
 402                 mfsfakelabel.d_partitions[0].p_cpg = 16;
 403
 404                 lp = &mfsfakelabel;
 405                 pp = &mfsfakelabel.d_partitions[0];
 406
 407                 goto havelabel;
 408         }
 409
 410         cp = strrchr(special, '/');
 411         if (cp == 0) {
 412                 /*
 413                  * No path prefix; try /dev/%s.
 414                  */
 415                 (void)snprintf(device, sizeof(device), "%s%s", _PATH_DEV, special);
 416                 special = device;
 417         }
 418         if (Nflag) {
 419                 fso = -1;
 420         } else {
 421                 fso = open(special, O_WRONLY);
 422                 if (fso < 0)
 423                         fatal("%s: %s", special, strerror(errno));
 424
 425                 /* Bail if target special is mounted */
 426                 n = getmntinfo(&mp, MNT_NOWAIT);
 427                 if (n == 0)
 428                         fatal("%s: getmntinfo: %s", special, strerror(errno));
 429
 430                 len = sizeof(_PATH_DEV) - 1;
 431                 s1 = special;
 432                 if (strncmp(_PATH_DEV, s1, len) == 0)
 433                         s1 += len;
 434
 435                 while (--n >= 0) {
 436                         s2 = mp->f_mntfromname;
 437                         if (strncmp(_PATH_DEV, s2, len) == 0) {
 438                                 s2 += len - 1;
 439                                 *s2 = 'r';
 440                         }
 441                         if (strcmp(s1, s2) == 0 || strcmp(s1, &s2[1]) == 0)
 442                                 fatal("%s is mounted on %s",
 443                                     special, mp->f_mntonname);
 444                         ++mp;
 445                 }
 446         }
 447         if (mfs && disktype != NULL) {
 448                 lp = (struct disklabel *)getdiskbyname(disktype);
 449                 if (lp == NULL)
 450                         fatal("%s: unknown disk type", disktype);
 451                 pp = &lp->d_partitions[1];
 452         } else {
 453                 fsi = open(special, O_RDONLY);
 454                 if (fsi < 0)
 455                         fatal("%s: %s", special, strerror(errno));
 456                 if (fstat(fsi, &st) < 0)
 457                         fatal("%s: %s", special, strerror(errno));
 458                 if ((st.st_mode & S_IFMT) != S_IFCHR && !mfs)
 459                         printf("%s: %s: not a character-special device\n",
 460                             progname, special);
 461                 cp = strchr(argv[0], '\0');
 462                 if (cp == argv[0])
 463                         fatal("null special file name");
 464                 cp--;
 465                 if (!vflag && (*cp < 'a' || *cp >= 'a' + MAXPARTITIONS) && !isdigit(*cp)) {
 466                         fatal("%s: can't figure out file system partition",
 467                             argv[0]);
 468                 }
 469 #ifdef COMPAT
 470                 if (!mfs && disktype == NULL)
 471                         disktype = argv[1];
 472 #endif
 473                 lp = getdisklabel(special, fsi);
 474                 if (vflag || isdigit(*cp))
 475                         pp = &lp->d_partitions[0];
 476                 else
 477                         pp = &lp->d_partitions[*cp - 'a'];
 478                 if (pp->p_size == 0)
 479                         fatal("%s: `%c' partition is unavailable",
 480                             argv[0], *cp);
 481                 if (pp->p_fstype == FS_BOOT)
 482                         fatal("%s: `%c' partition overlaps boot program",
 483                               argv[0], *cp);
 484         }
 485 havelabel:
 486         if (fssize == 0)
 487                 fssize = pp->p_size;
 488         if (fssize > pp->p_size && !mfs)
 489                fatal("%s: maximum file system size on the `%c' partition is %d",
 490                         argv[0], *cp, pp->p_size);
 491         if (rpm == 0) {
 492                 rpm = lp->d_rpm;
 493                 if (rpm <= 0)
 494                         rpm = 3600;
 495         }
 496         if (ntracks == 0) {
 497                 ntracks = lp->d_ntracks;
 498                 if (ntracks <= 0)
 499                         fatal("%s: no default #tracks", argv[0]);
 500         }
 501         if (nsectors == 0) {
 502                 nsectors = lp->d_nsectors;
 503                 if (nsectors <= 0)
 504                         fatal("%s: no default #sectors/track", argv[0]);
 505         }
 506         if (sectorsize == 0) {
 507                 sectorsize = lp->d_secsize;
 508                 if (sectorsize <= 0)
 509                         fatal("%s: no default sector size", argv[0]);
 510         }
 511         if (trackskew == -1) {
 512                 trackskew = lp->d_trackskew;
 513                 if (trackskew < 0)
 514                         trackskew = 0;
 515         }
 516         if (interleave == 0) {
 517                 interleave = lp->d_interleave;
 518                 if (interleave <= 0)
 519                         interleave = 1;
 520         }
 521         if (fsize == 0) {
 522                 fsize = pp->p_fsize;
 523                 if (fsize <= 0)
 524                         fsize = MAX(DFL_FRAGSIZE, lp->d_secsize);
 525         }
 526         if (bsize == 0) {
 527                 bsize = pp->p_frag * pp->p_fsize;
 528                 if (bsize <= 0)
 529                         bsize = MIN(DFL_BLKSIZE, 8 * fsize);
 530         }
 531         /*
 532          * Maxcontig sets the default for the maximum number of blocks
 533          * that may be allocated sequentially. With filesystem clustering
 534          * it is possible to allocate contiguous blocks up to the maximum
 535          * transfer size permitted by the controller or buffering.
 536          */
 537         if (maxcontig == 0)
 538                 maxcontig = MAX(1, MAXPHYS / bsize - 1);
 539         if (density == 0)
 540                 density = NFPI * fsize;
 541         if (minfree < MINFREE && opt != FS_OPTSPACE) {
 542                 fprintf(stderr, "Warning: changing optimization to space ");
 543                 fprintf(stderr, "because minfree is less than %d%%\n", MINFREE);
 544                 opt = FS_OPTSPACE;
 545         }
 546         if (trackspares == -1) {
 547                 trackspares = lp->d_sparespertrack;
 548                 if (trackspares < 0)
 549                         trackspares = 0;
 550         }
 551         nphyssectors = nsectors + trackspares;
 552         if (cylspares == -1) {
 553                 cylspares = lp->d_sparespercyl;
 554                 if (cylspares < 0)
 555                         cylspares = 0;
 556         }
 557         secpercyl = nsectors * ntracks - cylspares;
 558         /*
 559          * Only complain if -t or -u have been specified; the default
 560          * case (4096 sectors per cylinder) is intended to disagree
 561          * with the disklabel.
 562          */
 563         if (t_or_u_flag && secpercyl != lp->d_secpercyl)
 564                 fprintf(stderr, "%s (%d) %s (%lu)\n",
 565                         "Warning: calculated sectors per cylinder", secpercyl,
 566                         "disagrees with disk label", (u_long)lp->d_secpercyl);
 567         if (maxbpg == 0)
 568                 maxbpg = MAXBLKPG(bsize);
 569         headswitch = lp->d_headswitch;
 570         trackseek = lp->d_trkseek;
 571 #ifdef notdef /* label may be 0 if faked up by kernel */
 572         bbsize = lp->d_bbsize;
 573         sbsize = lp->d_sbsize;
 574 #endif
 575         oldpartition = *pp;
 576 #ifdef tahoe
 577         realsectorsize = sectorsize;
 578         if (sectorsize != DEV_BSIZE) {          /* XXX */
 579                 int secperblk = DEV_BSIZE / sectorsize;
 580
 581                 sectorsize = DEV_BSIZE;
 582                 nsectors /= secperblk;
 583                 nphyssectors /= secperblk;
 584                 secpercyl /= secperblk;
 585                 fssize /= secperblk;
 586                 pp->p_size /= secperblk;
 587         }
 588 #else
 589         realsectorsize = sectorsize;
 590         if (sectorsize != DEV_BSIZE) {          /* XXX */
 591                 int secperblk = sectorsize / DEV_BSIZE;
 592
 593                 sectorsize = DEV_BSIZE;
 594                 nsectors *= secperblk;
 595                 nphyssectors *= secperblk;
 596                 secpercyl *= secperblk;
 597                 fssize *= secperblk;
 598                 pp->p_size *= secperblk;
 599         }
 600 #endif
 601         if (mfs) {
 602                 mfs_mtpt = argv[1];
 603                 if (
 604                     stat(mfs_mtpt, &mfs_mtstat) < 0 ||
 605                     !S_ISDIR(mfs_mtstat.st_mode)
 606                 ) {
 607                         fatal("mount point not dir: %s", mfs_mtpt);
 608                 }
 609         }
 610         mkfs(pp, special, fsi, fso, (Cflag && mfs) ? argv[1] : NULL);
 611 #ifdef tahoe
 612         if (realsectorsize != DEV_BSIZE)
 613                 pp->p_size *= DEV_BSIZE / realsectorsize;
 614 #else
 615         if (realsectorsize != DEV_BSIZE)
 616                 pp->p_size /= realsectorsize /DEV_BSIZE;
 617 #endif
 618         if (!Nflag && bcmp(pp, &oldpartition, sizeof(oldpartition)))
 619                 rewritelabel(special, fso, lp);
 620         if (!Nflag)
 621                 close(fso);
 622         close(fsi);
 623 #ifdef MFS
 624         if (mfs) {
 625                 struct mfs_args args;
 626                 int udev;
 627
 628                 snprintf(mfsdevname, sizeof(mfsdevname), "/dev/mfs%d",
 629                         getpid());
 630                 args.fspec = mfsdevname;
 631                 args.export.ex_root = -2;
 632                 if (mntflags & MNT_RDONLY)
 633                         args.export.ex_flags = MNT_EXRDONLY;
 634                 else
 635                         args.export.ex_flags = 0;
 636                 args.base = membase;
 637                 args.size = fssize * sectorsize;
 638
 639                 error = getvfsbyname("mfs", &vfc);
 640                 if (error && vfsisloadable("mfs")) {
 641                         if (vfsload("mfs"))
 642                                 fatal("vfsload(mfs)");
 643                         endvfsent();    /* flush cache */
 644                         error = getvfsbyname("mfs", &vfc);
 645                 }
 646                 if (error)
 647                         fatal("mfs filesystem not available");
 648
 649                 udev = (253 << 8) | (getpid() & 255) |
 650                         ((getpid() & ~0xFF) << 8);
 651                 if (mknod(mfsdevname, S_IFCHR | 0700, udev) < 0)
 652                         printf("Warning: unable to create %s\n", mfsdevname);
 653                 signal(SIGINT, mfsintr);
 654                 if (mount(vfc.vfc_name, argv[1], mntflags, &args) < 0)
 655                         fatal("%s: %s", argv[1], strerror(errno));
 656                 signal(SIGINT, SIG_DFL);
 657                 mfsintr(SIGINT);
 658         }
 659 #endif
 660         exit(0);
 661 }
 662
 663 #ifdef MFS
 664
 665 static void
 666 mfsintr(int signo)
 667 {
 668         if (filename)
 669                 munmap(membase, fssize * sectorsize);
 670         remove(mfsdevname);
 671 }
 672
 673 #endif
 674
 675 #ifdef COMPAT
 676 char lmsg[] = "%s: can't read disk label; disk type must be specified";
 677 #else
 678 char lmsg[] = "%s: can't read disk label";
 679 #endif
 680
 681 struct disklabel *
 682 getdisklabel(char *s, int fd)
 683 {
 684         static struct disklabel lab;
 685
 686         if (ioctl(fd, DIOCGDINFO, (char *)&lab) < 0) {
 687 #ifdef COMPAT
 688                 if (disktype) {
 689                         struct disklabel *lp, *getdiskbyname();
 690
 691                         unlabeled++;
 692                         lp = getdiskbyname(disktype);
 693                         if (lp == NULL)
 694                                 fatal("%s: unknown disk type", disktype);
 695                         return (lp);
 696                 }
 697 #endif
 698                 warn("ioctl (GDINFO)");
 699                 fatal(lmsg, s);
 700         }
 701         return (&lab);
 702 }
 703
 704 static void
 705 rewritelabel(char *s, int fd, struct disklabel *lp)
 706 {
 707 #ifdef COMPAT
 708         if (unlabeled)
 709                 return;
 710 #endif
 711         lp->d_checksum = 0;
 712         lp->d_checksum = dkcksum(lp);
 713         if (ioctl(fd, DIOCWDINFO, (char *)lp) < 0) {
 714                 warn("ioctl (WDINFO)");
 715                 fatal("%s: can't rewrite disk label", s);
 716         }
 717 }
 718
 719 /*VARARGS*/
 720 void
 721 fatal(const char *fmt, ...)
 722 {
 723         va_list ap;
 724
 725         va_start(ap, fmt);
 726         if (fcntl(STDERR_FILENO, F_GETFL) < 0) {
 727                 openlog(progname, LOG_CONS, LOG_DAEMON);
 728                 vsyslog(LOG_ERR, fmt, ap);
 729                 closelog();
 730         } else {
 731                 vwarnx(fmt, ap);
 732         }
 733         va_end(ap);
 734         exit(1);
 735         /*NOTREACHED*/
 736 }
 737
 738 static void
 739 usage(void)
 740 {
 741         if (mfs) {
 742                 fprintf(stderr,
 743                     "usage: %s [ -fsoptions ] special-device mount-point\n",
 744                         progname);
 745         } else
 746                 fprintf(stderr,
 747                     "usage: %s [ -fsoptions ] special-device%s\n",
 748                     progname,
 749 #ifdef COMPAT
 750                     " [device-type]");
 751 #else
 752                     "");
 753 #endif
 754         fprintf(stderr, "where fsoptions are:\n");
 755         fprintf(stderr, "\t-C (mfs) Copy the underlying filesystem to the MFS mount\n");
 756         fprintf(stderr,
 757             "\t-N do not create file system, just print out parameters\n");
 758         fprintf(stderr, "\t-O create a 4.3BSD format filesystem\n");
 759         fprintf(stderr, "\t-S sector size\n");
 760 #ifdef COMPAT
 761         fprintf(stderr, "\t-T disktype\n");
 762 #endif
 763         fprintf(stderr, "\t-U enable soft updates\n");
 764         fprintf(stderr, "\t-a maximum contiguous blocks\n");
 765         fprintf(stderr, "\t-b block size\n");
 766         fprintf(stderr, "\t-c cylinders/group\n");
 767         fprintf(stderr, "\t-d rotational delay between contiguous blocks\n");
 768         fprintf(stderr, "\t-e maximum blocks per file in a cylinder group\n");
 769         fprintf(stderr, "\t-f frag size\n");
 770         fprintf(stderr, "\t-g average file size\n");
 771         fprintf(stderr, "\t-h average files per directory\n");
 772         fprintf(stderr, "\t-i number of bytes per inode\n");
 773         fprintf(stderr, "\t-k sector 0 skew, per track\n");
 774         fprintf(stderr, "\t-l hardware sector interleave\n");
 775         fprintf(stderr, "\t-m minimum free space %%\n");
 776         fprintf(stderr, "\t-n number of distinguished rotational positions\n");
 777         fprintf(stderr, "\t-o optimization preference (`space' or `time')\n");
 778         fprintf(stderr, "\t-p spare sectors per track\n");
 779         fprintf(stderr, "\t-s file system size (sectors)\n");
 780         fprintf(stderr, "\t-r revolutions/minute\n");
 781         fprintf(stderr, "\t-t tracks/cylinder\n");
 782         fprintf(stderr, "\t-u sectors/track\n");
 783         fprintf(stderr,
 784         "\t-v do not attempt to determine partition name from device name\n");
 785         fprintf(stderr, "\t-x spare sectors per cylinder\n");
 786         exit(1);
 787 }