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 1.17 2007/06/19 19:18:20 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/diskslice.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 #include <disktab.h>
  63
  64 #ifdef MFS
  65 #include <sys/types.h>
  66 #include <sys/mman.h>
  67 #endif
  68
  69 #if __STDC__
  70 #include <stdarg.h>
  71 #else
  72 #include <varargs.h>
  73 #endif
  74
  75 #include "mntopts.h"
  76 #include "defs.h"
  77
  78 struct mntopt mopts[] = {
  79         MOPT_STDOPTS,
  80         MOPT_ASYNC,
  81         MOPT_NULL,
  82 };
  83
  84 void    fatal(const char *fmt, ...);
  85
  86 #define COMPAT                  /* allow non-labeled disks */
  87
  88 /*
  89  * The following two constants set the default block and fragment sizes.
  90  * Both constants must be a power of 2 and meet the following constraints:
  91  *      MINBSIZE <= DESBLKSIZE <= MAXBSIZE
  92  *      sectorsize <= DESFRAGSIZE <= DESBLKSIZE
  93  *      DESBLKSIZE / DESFRAGSIZE <= 8
  94  */
  95 #define DFL_FRAGSIZE    2048
  96 #define DFL_BLKSIZE     16384
  97
  98 /*
  99  * Cylinder groups may have up to many cylinders. The actual
 100  * number used depends upon how much information can be stored
 101  * on a single cylinder. The default is to use as many as possible
 102  * cylinders per group.
 103  */
 104 #define DESCPG          65536   /* desired fs_cpg ("infinity") */
 105
 106 /*
 107  * Once upon a time...
 108  *    ROTDELAY gives the minimum number of milliseconds to initiate
 109  *    another disk transfer on the same cylinder. It is used in
 110  *    determining the rotationally optimal layout for disk blocks
 111  *    within a file; the default of fs_rotdelay is 4ms.
 112  *
 113  * ...but now we make this 0 to disable the rotdelay delay because
 114  * modern drives with read/write-behind achieve higher performance
 115  * without the delay.
 116  */
 117 #define ROTDELAY        0
 118
 119 /*
 120  * MAXBLKPG determines the maximum number of data blocks which are
 121  * placed in a single cylinder group. The default is one indirect
 122  * block worth of data blocks.
 123  */
 124 #define MAXBLKPG(bsize) ((bsize) / sizeof(daddr_t))
 125
 126 /*
 127  * Each file system has a number of inodes statically allocated.
 128  * We allocate one inode slot per NFPI fragments, expecting this
 129  * to be far more than we will ever need.
 130  */
 131 #define NFPI            4
 132
 133 /*
 134  * Once upon a time...
 135  *    For each cylinder we keep track of the availability of blocks at different
 136  *    rotational positions, so that we can lay out the data to be picked
 137  *    up with minimum rotational latency.  NRPOS is the default number of
 138  *    rotational positions that we distinguish.  With NRPOS of 8 the resolution
 139  *    of our summary information is 2ms for a typical 3600 rpm drive.
 140  *
 141  * ...but now we make this 1 (which essentially disables the rotational
 142  * position table because modern drives with read-ahead and write-behind do
 143  * better without the rotational position table.
 144  */
 145 #define NRPOS           1       /* number distinct rotational positions */
 146
 147 /*
 148  * About the same time as the above, we knew what went where on the disks.
 149  * no longer so, so kill the code which finds the different platters too...
 150  * We do this by saying one head, with a lot of sectors on it.
 151  * The number of sectors are used to determine the size of a cyl-group.
 152  * Kirk suggested one or two meg per "cylinder" so we say two.
 153  */
 154 #define NTRACKS         1       /* number of heads */
 155 #define NSECTORS        4096    /* number of sectors */
 156
 157 int     mfs;                    /* run as the memory based filesystem */
 158 char    *mfs_mtpt;              /* mount point for mfs          */
 159 struct stat mfs_mtstat;         /* stat prior to mount          */
 160 int     Nflag;                  /* run without writing file system */
 161 int     Oflag;                  /* format as an 4.3BSD file system */
 162 int     Cflag;                  /* copy underlying filesystem (mfs only) */
 163 int     Uflag;                  /* enable soft updates for file system */
 164 u_long  fssize;                 /* file system size */
 165 int     ntracks = NTRACKS;      /* # tracks/cylinder */
 166 int     nsectors = NSECTORS;    /* # sectors/track */
 167 int     nphyssectors;           /* # sectors/track including spares */
 168 int     secpercyl;              /* sectors per cylinder */
 169 int     trackspares = -1;       /* spare sectors per track */
 170 int     cylspares = -1;         /* spare sectors per cylinder */
 171 int     sectorsize;             /* bytes/sector */
 172 int     realsectorsize;         /* bytes/sector in hardware */
 173 int     rpm;                    /* revolutions/minute of drive */
 174 int     interleave;             /* hardware sector interleave */
 175 int     trackskew = -1;         /* sector 0 skew, per track */
 176 int     headswitch;             /* head switch time, usec */
 177 int     trackseek;              /* track-to-track seek, usec */
 178 int     fsize = 0;              /* fragment size */
 179 int     bsize = 0;              /* block size */
 180 int     cpg = DESCPG;           /* cylinders/cylinder group */
 181 int     cpgflg;                 /* cylinders/cylinder group flag was given */
 182 int     minfree = MINFREE;      /* free space threshold */
 183 int     opt = DEFAULTOPT;       /* optimization preference (space or time) */
 184 int     density;                /* number of bytes per inode */
 185 int     maxcontig = 0;          /* max contiguous blocks to allocate */
 186 int     rotdelay = ROTDELAY;    /* rotational delay between blocks */
 187 int     maxbpg;                 /* maximum blocks per file in a cyl group */
 188 int     nrpos = NRPOS;          /* # of distinguished rotational positions */
 189 int     avgfilesize = AVFILESIZ;/* expected average file size */
 190 int     avgfilesperdir = AFPDIR;/* expected number of files per directory */
 191 int     bbsize = BBSIZE;        /* boot block size */
 192 int     sbsize = SBSIZE;        /* superblock size */
 193 int     mntflags = MNT_ASYNC;   /* flags to be passed to mount */
 194 int     t_or_u_flag = 0;        /* user has specified -t or -u */
 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    mfsdevname[256];
 203 char    *progname;
 204
 205 static void usage(void);
 206 static void mfsintr(int signo);
 207
 208 int
 209 main(int argc, char **argv)
 210 {
 211         int ch;
 212         struct disktab geom;            /* disk geometry data */
 213         struct stat st;
 214         struct statfs *mp;
 215         int fsi = -1, fso = -1, len, n, vflag;
 216         char *s1, *s2, *special;
 217         const char *opstring;
 218 #ifdef MFS
 219         struct vfsconf vfc;
 220         int error;
 221 #endif
 222
 223         bzero(&geom, sizeof(geom));
 224         vflag = 0;
 225         if ((progname = strrchr(*argv, '/')))
 226                 ++progname;
 227         else
 228                 progname = *argv;
 229
 230         if (strstr(progname, "mfs")) {
 231                 mfs = 1;
 232                 Nflag++;
 233         }
 234
 235         opstring = mfs ?
 236             "NCF:T:Ua:b:c:d:e:f:g:h:i:m:o:s:v" :
 237             "NOS:T:Ua:b:c:d:e:f:g:h:i:k:l:m:n:o:p:r:s:t:u:vx:";
 238         while ((ch = getopt(argc, argv, opstring)) != -1) {
 239                 switch (ch) {
 240                 case 'N':
 241                         Nflag = 1;
 242                         break;
 243                 case 'O':
 244                         Oflag = 1;
 245                         break;
 246                 case 'C':
 247                         Cflag = 1;      /* MFS only */
 248                         break;
 249                 case 'S':
 250                         if ((sectorsize = atoi(optarg)) <= 0)
 251                                 fatal("%s: bad sector size", optarg);
 252                         break;
 253 #ifdef COMPAT
 254                 case 'T':
 255                         disktype = optarg;
 256                         break;
 257 #endif
 258                 case 'F':
 259                         filename = optarg;
 260                         break;
 261                 case 'U':
 262                         Uflag = 1;
 263                         break;
 264                 case 'a':
 265                         if ((maxcontig = atoi(optarg)) <= 0)
 266                                 fatal("%s: bad maximum contiguous blocks",
 267                                     optarg);
 268                         break;
 269                 case 'b':
 270                         if ((bsize = atoi(optarg)) < MINBSIZE)
 271                                 fatal("%s: bad block size", optarg);
 272                         break;
 273                 case 'c':
 274                         if ((cpg = atoi(optarg)) <= 0)
 275                                 fatal("%s: bad cylinders/group", optarg);
 276                         cpgflg++;
 277                         break;
 278                 case 'd':
 279                         if ((rotdelay = atoi(optarg)) < 0)
 280                                 fatal("%s: bad rotational delay", optarg);
 281                         break;
 282                 case 'e':
 283                         if ((maxbpg = atoi(optarg)) <= 0)
 284                 fatal("%s: bad blocks per file in a cylinder group",
 285                                     optarg);
 286                         break;
 287                 case 'f':
 288                         if ((fsize = atoi(optarg)) <= 0)
 289                                 fatal("%s: bad fragment size", optarg);
 290                         break;
 291                 case 'g':
 292                         if ((avgfilesize = atoi(optarg)) <= 0)
 293                                 fatal("%s: bad average file size", optarg);
 294                         break;
 295                 case 'h':
 296                         if ((avgfilesperdir = atoi(optarg)) <= 0)
 297                                 fatal("%s: bad average files per dir", optarg);
 298                         break;
 299                 case 'i':
 300                         if ((density = atoi(optarg)) <= 0)
 301                                 fatal("%s: bad bytes per inode", optarg);
 302                         break;
 303                 case 'k':
 304                         if ((trackskew = atoi(optarg)) < 0)
 305                                 fatal("%s: bad track skew", optarg);
 306                         break;
 307                 case 'l':
 308                         if ((interleave = atoi(optarg)) <= 0)
 309                                 fatal("%s: bad interleave", optarg);
 310                         break;
 311                 case 'm':
 312                         if ((minfree = atoi(optarg)) < 0 || minfree > 99)
 313                                 fatal("%s: bad free space %%", optarg);
 314                         break;
 315                 case 'n':
 316                         if ((nrpos = atoi(optarg)) < 0)
 317                                 fatal("%s: bad rotational layout count",
 318                                     optarg);
 319                         if (nrpos == 0)
 320                                 nrpos = 1;
 321                         break;
 322                 case 'o':
 323                         if (mfs)
 324                                 getmntopts(optarg, mopts, &mntflags, 0);
 325                         else {
 326                                 if (strcmp(optarg, "space") == 0)
 327                                         opt = FS_OPTSPACE;
 328                                 else if (strcmp(optarg, "time") == 0)
 329                                         opt = FS_OPTTIME;
 330                                 else
 331         fatal("%s: unknown optimization preference: use `space' or `time'", optarg);
 332                         }
 333                         break;
 334                 case 'p':
 335                         if ((trackspares = atoi(optarg)) < 0)
 336                                 fatal("%s: bad spare sectors per track",
 337                                     optarg);
 338                         break;
 339                 case 'r':
 340                         if ((rpm = atoi(optarg)) <= 0)
 341                                 fatal("%s: bad revolutions/minute", optarg);
 342                         break;
 343                 case 's':
 344                         /*
 345                          * Unsigned long but limit to long.  On 32 bit a
 346                          * tad under 2G, on 64 bit the upper bound is more
 347                          * swap space then operand size.
 348                          *
 349                          * NOTE: fssize is converted from 512 byte sectors
 350                          * to filesystem block-sized sectors by mkfs XXX.
 351                          */
 352                         fssize = strtoul(optarg, NULL, 10);
 353                         if (fssize == 0 || fssize > LONG_MAX)
 354                                 fatal("%s: bad file system size", optarg);
 355                         break;
 356                 case 't':
 357                         t_or_u_flag++;
 358                         if ((ntracks = atoi(optarg)) < 0)
 359                                 fatal("%s: bad total tracks", optarg);
 360                         break;
 361                 case 'u':
 362                         t_or_u_flag++;
 363                         if ((nsectors = atoi(optarg)) < 0)
 364                                 fatal("%s: bad sectors/track", optarg);
 365                         break;
 366                 case 'v':
 367                         vflag = 1;
 368                         break;
 369                 case 'x':
 370                         if ((cylspares = atoi(optarg)) < 0)
 371                                 fatal("%s: bad spare sectors per cylinder",
 372                                     optarg);
 373                         break;
 374                 case '?':
 375                 default:
 376                         usage();
 377                 }
 378         }
 379         argc -= optind;
 380         argv += optind;
 381
 382         if (argc != 2 && (mfs || argc != 1))
 383                 usage();
 384
 385         special = argv[0];
 386         /* Copy the NetBSD way of faking up a disk label */
 387         if (mfs && !strcmp(special, "swap")) {
 388                 /*
 389                  * it's an MFS, mounted on "swap."  fake up a label.
 390                  * XXX XXX XXX
 391                  */
 392                 fso = -1;       /* XXX; normally done below. */
 393
 394                 geom.d_media_blksize = 512;
 395                 geom.d_nheads = 16;
 396                 geom.d_secpertrack = 64;
 397                 /* geom.d_ncylinders not used */
 398                 geom.d_secpercyl = 1024;
 399                 geom.d_media_blocks = 16384;
 400                 geom.d_rpm = 3600;
 401                 geom.d_interleave = 1;
 402
 403                 goto havelabel;
 404         }
 405
 406         /*
 407          * If we can't stat the device and the path is relative, try
 408          * prepending /dev.
 409          */
 410         if (stat(special, &st) < 0 && special[0] && special[0] != '/')
 411                 asprintf(&special, "/dev/%s", special);
 412
 413         if (Nflag) {
 414                 fso = -1;
 415         } else {
 416                 fso = open(special, O_WRONLY);
 417                 if (fso < 0)
 418                         fatal("%s: %s", special, strerror(errno));
 419
 420                 /* Bail if target special is mounted */
 421                 n = getmntinfo(&mp, MNT_NOWAIT);
 422                 if (n == 0)
 423                         fatal("%s: getmntinfo: %s", special, strerror(errno));
 424
 425                 len = sizeof(_PATH_DEV) - 1;
 426                 s1 = special;
 427                 if (strncmp(_PATH_DEV, s1, len) == 0)
 428                         s1 += len;
 429
 430                 while (--n >= 0) {
 431                         s2 = mp->f_mntfromname;
 432                         if (strncmp(_PATH_DEV, s2, len) == 0) {
 433                                 s2 += len - 1;
 434                                 *s2 = 'r';
 435                         }
 436                         if (strcmp(s1, s2) == 0 || strcmp(s1, &s2[1]) == 0)
 437                                 fatal("%s is mounted on %s",
 438                                     special, mp->f_mntonname);
 439                         ++mp;
 440                 }
 441         }
 442         if (mfs && disktype != NULL) {
 443                 struct disktab *dt;
 444
 445                 if ((dt = getdisktabbyname(disktype)) == NULL)
 446                         fatal("%s: unknown disk type", disktype);
 447                 geom = *dt;
 448         } else {
 449                 struct partinfo pinfo;
 450
 451                 if (special[0] == 0)
 452                         fatal("null special file name");
 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 && !vflag)
 459                         printf("%s: %s: not a character-special device\n",
 460                             progname, special);
 461 #ifdef COMPAT
 462                 if (!mfs && disktype == NULL)
 463                         disktype = argv[1];
 464 #endif
 465                 if (ioctl(fsi, DIOCGPART, &pinfo) < 0) {
 466                         if (!vflag) {
 467                                 fatal("%s: unable to retrieve geometry "
 468                                       "information", argv[0]);
 469                         }
 470                         /*
 471                          * fake up geometry data
 472                          */
 473                         geom.d_media_blksize = 512;
 474                         geom.d_nheads = 16;
 475                         geom.d_secpertrack = 64;
 476                         geom.d_secpercyl = 1024;
 477                         geom.d_media_blocks = st.st_size /
 478                                               geom.d_media_blksize;
 479                         geom.d_media_size = geom.d_media_blocks *
 480                                             geom.d_media_blksize;
 481                         /* geom.d_ncylinders not used */
 482                 } else {
 483                         /*
 484                          * extract geometry from pinfo
 485                          */
 486                         geom.d_media_blksize = pinfo.media_blksize;
 487                         geom.d_nheads = pinfo.d_nheads;
 488                         geom.d_secpertrack = pinfo.d_secpertrack;
 489                         geom.d_secpercyl = pinfo.d_secpercyl;
 490                         /* geom.d_ncylinders not used */
 491                         geom.d_media_blocks = pinfo.media_blocks;
 492                         geom.d_media_size = pinfo.media_size;
 493                 }
 494                 if (geom.d_media_blocks == 0 || geom.d_media_size == 0) {
 495                         fatal("%s: is unavailable", argv[0]);
 496                 }
 497                 printf("%s: media size %6.2fMB\n",
 498                         argv[0], geom.d_media_size / 1024.0 / 1024.0);
 499                 if (geom.d_media_size / 512 >= 0x80000000ULL)
 500                         fatal("%s: media size is too large for newfs to handle",
 501                               argv[0]);
 502         }
 503 havelabel:
 504         if (fssize == 0)
 505                 fssize = geom.d_media_blocks;
 506         if ((u_long)fssize > geom.d_media_blocks && !mfs) {
 507                fatal("%s: maximum file system size is %lld blocks",
 508                      argv[0], geom.d_media_blocks);
 509         }
 510         if (rpm == 0) {
 511                 rpm = geom.d_rpm;
 512                 if (rpm <= 0)
 513                         rpm = 3600;
 514         }
 515         if (ntracks == 0) {
 516                 ntracks = geom.d_nheads;
 517                 if (ntracks <= 0)
 518                         fatal("%s: no default #tracks", argv[0]);
 519         }
 520         if (nsectors == 0) {
 521                 nsectors = geom.d_secpertrack;
 522                 if (nsectors <= 0)
 523                         fatal("%s: no default #sectors/track", argv[0]);
 524         }
 525         if (sectorsize == 0) {
 526                 sectorsize = geom.d_media_blksize;
 527                 if (sectorsize <= 0)
 528                         fatal("%s: no default sector size", argv[0]);
 529         }
 530         if (trackskew == -1) {
 531                 trackskew = geom.d_trackskew;
 532                 if (trackskew < 0)
 533                         trackskew = 0;
 534         }
 535         if (interleave == 0) {
 536                 interleave = geom.d_interleave;
 537                 if (interleave <= 0)
 538                         interleave = 1;
 539         }
 540         if (fsize == 0)
 541                 fsize = MAX(DFL_FRAGSIZE, geom.d_media_blksize);
 542         if (bsize == 0)
 543                 bsize = MIN(DFL_BLKSIZE, 8 * fsize);
 544         /*
 545          * Maxcontig sets the default for the maximum number of blocks
 546          * that may be allocated sequentially. With filesystem clustering
 547          * it is possible to allocate contiguous blocks up to the maximum
 548          * transfer size permitted by the controller or buffering.
 549          */
 550         if (maxcontig == 0)
 551                 maxcontig = MAX(1, MAXPHYS / bsize - 1);
 552         if (density == 0)
 553                 density = NFPI * fsize;
 554         if (minfree < MINFREE && opt != FS_OPTSPACE) {
 555                 fprintf(stderr, "Warning: changing optimization to space ");
 556                 fprintf(stderr, "because minfree is less than %d%%\n", MINFREE);
 557                 opt = FS_OPTSPACE;
 558         }
 559         if (trackspares == -1)
 560                 trackspares = 0;
 561         nphyssectors = nsectors + trackspares;
 562         if (cylspares == -1)
 563                 cylspares = 0;
 564         secpercyl = nsectors * ntracks - cylspares;
 565         /*
 566          * Only complain if -t or -u have been specified; the default
 567          * case (4096 sectors per cylinder) is intended to disagree
 568          * with the disklabel.
 569          */
 570         if (t_or_u_flag && (uint32_t)secpercyl != geom.d_secpercyl)
 571                 fprintf(stderr, "%s (%d) %s (%u)\n",
 572                         "Warning: calculated sectors per cylinder", secpercyl,
 573                         "disagrees with disk label", geom.d_secpercyl);
 574         if (maxbpg == 0)
 575                 maxbpg = MAXBLKPG(bsize);
 576         headswitch = geom.d_headswitch;
 577         trackseek = geom.d_trkseek;
 578         realsectorsize = sectorsize;
 579         if (sectorsize != DEV_BSIZE) {          /* XXX */
 580                 int secperblk = sectorsize / DEV_BSIZE;
 581
 582                 sectorsize = DEV_BSIZE;
 583                 nsectors *= secperblk;
 584                 nphyssectors *= secperblk;
 585                 secpercyl *= secperblk;
 586                 fssize *= secperblk;
 587         }
 588         if (mfs) {
 589                 mfs_mtpt = argv[1];
 590                 if (
 591                     stat(mfs_mtpt, &mfs_mtstat) < 0 ||
 592                     !S_ISDIR(mfs_mtstat.st_mode)
 593                 ) {
 594                         fatal("mount point not dir: %s", mfs_mtpt);
 595                 }
 596         }
 597         mkfs(special, fsi, fso, (Cflag && mfs) ? argv[1] : NULL);
 598
 599         /*
 600          * NOTE: Newfs no longer accesses or attempts to update the
 601          * filesystem disklabel.
 602          *
 603          * NOTE: fssize is converted from 512 byte sectors
 604          * to filesystem block-sized sectors by mkfs XXX.
 605          */
 606         if (!Nflag)
 607                 close(fso);
 608         close(fsi);
 609 #ifdef MFS
 610         if (mfs) {
 611                 struct mfs_args args;
 612
 613                 bzero(&args, sizeof(args));
 614
 615                 snprintf(mfsdevname, sizeof(mfsdevname), "/dev/mfs%d",
 616                         getpid());
 617                 args.fspec = mfsdevname;
 618                 args.export.ex_root = -2;
 619                 if (mntflags & MNT_RDONLY)
 620                         args.export.ex_flags = MNT_EXRDONLY;
 621                 else
 622                         args.export.ex_flags = 0;
 623                 args.base = membase;
 624                 args.size = fssize * fsize;
 625
 626                 error = getvfsbyname("mfs", &vfc);
 627                 if (error && vfsisloadable("mfs")) {
 628                         if (vfsload("mfs"))
 629                                 fatal("vfsload(mfs)");
 630                         endvfsent();    /* flush cache */
 631                         error = getvfsbyname("mfs", &vfc);
 632                 }
 633                 if (error)
 634                         fatal("mfs filesystem not available");
 635
 636 #if 0
 637                 int udev;
 638                 udev = (253 << 8) | (getpid() & 255) |
 639                         ((getpid() & ~0xFF) << 8);
 640                 if (mknod(mfsdevname, S_IFCHR | 0700, udev) < 0)
 641                         printf("Warning: unable to create %s\n", mfsdevname);
 642 #endif
 643                 signal(SIGINT, mfsintr);
 644                 if (mount(vfc.vfc_name, argv[1], mntflags, &args) < 0)
 645                         fatal("%s: %s", argv[1], strerror(errno));
 646                 signal(SIGINT, SIG_DFL);
 647                 mfsintr(SIGINT);
 648         }
 649 #endif
 650         exit(0);
 651 }
 652
 653 #ifdef MFS
 654
 655 static void
 656 mfsintr(__unused int signo)
 657 {
 658         if (filename)
 659                 munmap(membase, fssize * fsize);
 660 #if 0
 661         remove(mfsdevname);
 662 #endif
 663 }
 664
 665 #endif
 666
 667 /*VARARGS*/
 668 void
 669 fatal(const char *fmt, ...)
 670 {
 671         va_list ap;
 672
 673         va_start(ap, fmt);
 674         if (fcntl(STDERR_FILENO, F_GETFL) < 0) {
 675                 openlog(progname, LOG_CONS, LOG_DAEMON);
 676                 vsyslog(LOG_ERR, fmt, ap);
 677                 closelog();
 678         } else {
 679                 vwarnx(fmt, ap);
 680         }
 681         va_end(ap);
 682         exit(1);
 683         /*NOTREACHED*/
 684 }
 685
 686 static void
 687 usage(void)
 688 {
 689         if (mfs) {
 690                 fprintf(stderr,
 691                     "usage: %s [ -fsoptions ] special-device mount-point\n",
 692                         progname);
 693         } else
 694                 fprintf(stderr,
 695                     "usage: %s [ -fsoptions ] special-device%s\n",
 696                     progname,
 697 #ifdef COMPAT
 698                     " [device-type]");
 699 #else
 700                     "");
 701 #endif
 702         fprintf(stderr, "where fsoptions are:\n");
 703         fprintf(stderr, "\t-C (mfs) Copy the underlying filesystem to the MFS mount\n");
 704         fprintf(stderr,
 705             "\t-N do not create file system, just print out parameters\n");
 706         fprintf(stderr, "\t-O create a 4.3BSD format filesystem\n");
 707         fprintf(stderr, "\t-S sector size\n");
 708 #ifdef COMPAT
 709         fprintf(stderr, "\t-T disktype\n");
 710 #endif
 711         fprintf(stderr, "\t-U enable soft updates\n");
 712         fprintf(stderr, "\t-a maximum contiguous blocks\n");
 713         fprintf(stderr, "\t-b block size\n");
 714         fprintf(stderr, "\t-c cylinders/group\n");
 715         fprintf(stderr, "\t-d rotational delay between contiguous blocks\n");
 716         fprintf(stderr, "\t-e maximum blocks per file in a cylinder group\n");
 717         fprintf(stderr, "\t-f frag size\n");
 718         fprintf(stderr, "\t-g average file size\n");
 719         fprintf(stderr, "\t-h average files per directory\n");
 720         fprintf(stderr, "\t-i number of bytes per inode\n");
 721         fprintf(stderr, "\t-k sector 0 skew, per track\n");
 722         fprintf(stderr, "\t-l hardware sector interleave\n");
 723         fprintf(stderr, "\t-m minimum free space %%\n");
 724         fprintf(stderr, "\t-n number of distinguished rotational positions\n");
 725         fprintf(stderr, "\t-o optimization preference (`space' or `time')\n");
 726         fprintf(stderr, "\t-p spare sectors per track\n");
 727         fprintf(stderr, "\t-s file system size (sectors)\n");
 728         fprintf(stderr, "\t-r revolutions/minute\n");
 729         fprintf(stderr, "\t-t tracks/cylinder\n");
 730         fprintf(stderr, "\t-u sectors/track\n");
 731         fprintf(stderr,
 732         "\t-v do not attempt to determine partition name from device name\n");
 733         fprintf(stderr, "\t-x spare sectors per cylinder\n");
 734         exit(1);
 735 }