sbin/fsck_ffs/main.c

   1 /*-
   2  * SPDX-License-Identifier: BSD-3-Clause
   3  *
   4  * Copyright (c) 1980, 1986, 1993
   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. Neither the name of the University nor the names of its contributors
  16  *    may be used to endorse or promote products derived from this software
  17  *    without specific prior written permission.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  22  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  23  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  24  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  25  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  27  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  28  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  29  * SUCH DAMAGE.
  30  */
  31
  32 #if 0
  33 #ifndef lint
  34 static const char copyright[] =
  35 "@(#) Copyright (c) 1980, 1986, 1993\n\
  36         The Regents of the University of California.  All rights reserved.\n";
  37 #endif /* not lint */
  38
  39 #ifndef lint
  40 static char sccsid[] = "@(#)main.c      8.6 (Berkeley) 5/14/95";
  41 #endif /* not lint */
  42 #endif
  43 #include <sys/cdefs.h>
  44 __FBSDID("$FreeBSD$");
  45
  46 #define IN_RTLD                 /* So we pickup the P_OSREL defines */
  47 #include <sys/param.h>
  48 #include <sys/file.h>
  49 #include <sys/mount.h>
  50 #include <sys/resource.h>
  51 #include <sys/stat.h>
  52 #include <sys/sysctl.h>
  53 #include <sys/uio.h>
  54 #include <sys/disklabel.h>
  55
  56 #include <ufs/ufs/dinode.h>
  57 #include <ufs/ffs/fs.h>
  58
  59 #include <err.h>
  60 #include <errno.h>
  61 #include <fstab.h>
  62 #include <grp.h>
  63 #include <inttypes.h>
  64 #include <libufs.h>
  65 #include <mntopts.h>
  66 #include <paths.h>
  67 #include <stdint.h>
  68 #include <string.h>
  69 #include <time.h>
  70
  71 #include "fsck.h"
  72
  73 static int      restarts;
  74
  75 static void usage(void) __dead2;
  76 static intmax_t argtoimax(int flag, const char *req, const char *str, int base);
  77 static int checkfilesys(char *filesys);
  78 static int chkdoreload(struct statfs *mntp);
  79 static struct statfs *getmntpt(const char *);
  80
  81 int
  82 main(int argc, char *argv[])
  83 {
  84         int ch;
  85         struct rlimit rlimit;
  86         struct itimerval itimerval;
  87         int fsret;
  88         int ret = 0;
  89
  90         sync();
  91         skipclean = 1;
  92         inoopt = 0;
  93         while ((ch = getopt(argc, argv, "b:Bc:CdEfFm:npRrSyZz")) != -1) {
  94                 switch (ch) {
  95                 case 'b':
  96                         skipclean = 0;
  97                         bflag = argtoimax('b', "number", optarg, 10);
  98                         printf("Alternate super block location: %jd\n", bflag);
  99                         break;
 100
 101                 case 'B':
 102                         bkgrdflag = 1;
 103                         break;
 104
 105                 case 'c':
 106                         skipclean = 0;
 107                         cvtlevel = argtoimax('c', "conversion level", optarg,
 108                             10);
 109                         if (cvtlevel < 3)
 110                                 errx(EEXIT, "cannot do level %d conversion",
 111                                     cvtlevel);
 112                         break;
 113
 114                 case 'd':
 115                         debug++;
 116                         break;
 117
 118                 case 'E':
 119                         Eflag++;
 120                         break;
 121
 122                 case 'f':
 123                         skipclean = 0;
 124                         break;
 125
 126                 case 'F':
 127                         bkgrdcheck = 1;
 128                         break;
 129
 130                 case 'm':
 131                         lfmode = argtoimax('m', "mode", optarg, 8);
 132                         if (lfmode &~ 07777)
 133                                 errx(EEXIT, "bad mode to -m: %o", lfmode);
 134                         printf("** lost+found creation mode %o\n", lfmode);
 135                         break;
 136
 137                 case 'n':
 138                         nflag++;
 139                         yflag = 0;
 140                         break;
 141
 142                 case 'p':
 143                         preen++;
 144                         /*FALLTHROUGH*/
 145
 146                 case 'C':
 147                         ckclean++;
 148                         break;
 149
 150                 case 'R':
 151                         wantrestart = 1;
 152                         break;
 153                 case 'r':
 154                         inoopt++;
 155                         break;
 156
 157                 case 'S':
 158                         surrender = 1;
 159                         break;
 160
 161                 case 'y':
 162                         yflag++;
 163                         nflag = 0;
 164                         break;
 165
 166                 case 'Z':
 167                         Zflag++;
 168                         break;
 169
 170                 case 'z':
 171                         zflag++;
 172                         break;
 173
 174                 default:
 175                         usage();
 176                 }
 177         }
 178         argc -= optind;
 179         argv += optind;
 180
 181         if (!argc)
 182                 usage();
 183
 184         if (signal(SIGINT, SIG_IGN) != SIG_IGN)
 185                 (void)signal(SIGINT, catch);
 186         if (ckclean)
 187                 (void)signal(SIGQUIT, catchquit);
 188         signal(SIGINFO, infohandler);
 189         if (bkgrdflag) {
 190                 signal(SIGALRM, alarmhandler);
 191                 itimerval.it_interval.tv_sec = 5;
 192                 itimerval.it_interval.tv_usec = 0;
 193                 itimerval.it_value.tv_sec = 5;
 194                 itimerval.it_value.tv_usec = 0;
 195                 setitimer(ITIMER_REAL, &itimerval, NULL);
 196         }
 197         /*
 198          * Push up our allowed memory limit so we can cope
 199          * with huge file systems.
 200          */
 201         if (getrlimit(RLIMIT_DATA, &rlimit) == 0) {
 202                 rlimit.rlim_cur = rlimit.rlim_max;
 203                 (void)setrlimit(RLIMIT_DATA, &rlimit);
 204         }
 205         while (argc > 0) {
 206                 if ((fsret = checkfilesys(*argv)) == ERESTART)
 207                         continue;
 208                 ret |= fsret;
 209                 argc--;
 210                 argv++;
 211         }
 212
 213         if (returntosingle)
 214                 ret = 2;
 215         exit(ret);
 216 }
 217
 218 static intmax_t
 219 argtoimax(int flag, const char *req, const char *str, int base)
 220 {
 221         char *cp;
 222         intmax_t ret;
 223
 224         ret = strtoimax(str, &cp, base);
 225         if (cp == str || *cp)
 226                 errx(EEXIT, "-%c flag requires a %s", flag, req);
 227         return (ret);
 228 }
 229
 230 /*
 231  * Check the specified file system.
 232  */
 233 /* ARGSUSED */
 234 static int
 235 checkfilesys(char *filesys)
 236 {
 237         ufs2_daddr_t n_ffree, n_bfree;
 238         struct dups *dp;
 239         struct statfs *mntp;
 240         struct stat snapdir;
 241         struct group *grp;
 242         struct iovec *iov;
 243         char errmsg[255];
 244         int ofsmodified;
 245         int iovlen;
 246         intmax_t blks, files;
 247         size_t size;
 248
 249         iov = NULL;
 250         iovlen = 0;
 251         errmsg[0] = '\0';
 252         fsutilinit();
 253         fsckinit();
 254
 255         cdevname = filesys;
 256         if (debug && ckclean)
 257                 pwarn("starting\n");
 258         /*
 259          * Make best effort to get the disk name. Check first to see
 260          * if it is listed among the mounted file systems. Failing that
 261          * check to see if it is listed in /etc/fstab.
 262          */
 263         mntp = getmntpt(filesys);
 264         if (mntp != NULL)
 265                 filesys = mntp->f_mntfromname;
 266         else
 267                 filesys = blockcheck(filesys);
 268         /*
 269          * If -F flag specified, check to see whether a background check
 270          * is possible and needed. If possible and needed, exit with
 271          * status zero. Otherwise exit with status non-zero. A non-zero
 272          * exit status will cause a foreground check to be run.
 273          */
 274         sblock_init();
 275         if (bkgrdcheck) {
 276                 if ((fsreadfd = open(filesys, O_RDONLY)) < 0 || readsb(0) == 0)
 277                         exit(3);        /* Cannot read superblock */
 278                 close(fsreadfd);
 279                 /* Earlier background failed or journaled */
 280                 if (sblock.fs_flags & (FS_NEEDSFSCK | FS_SUJ))
 281                         exit(4);
 282                 if ((sblock.fs_flags & FS_DOSOFTDEP) == 0)
 283                         exit(5);        /* Not running soft updates */
 284                 size = MIBSIZE;
 285                 if (sysctlnametomib("vfs.ffs.adjrefcnt", adjrefcnt, &size) < 0)
 286                         exit(6);        /* Lacks kernel support */
 287                 if ((mntp == NULL && sblock.fs_clean == 1) ||
 288                     (mntp != NULL && (sblock.fs_flags & FS_UNCLEAN) == 0))
 289                         exit(7);        /* Filesystem clean, report it now */
 290                 exit(0);
 291         }
 292         if (ckclean && skipclean) {
 293                 /*
 294                  * If file system is gjournaled, check it here.
 295                  */
 296                 if ((fsreadfd = open(filesys, O_RDONLY)) < 0 || readsb(0) == 0)
 297                         exit(3);        /* Cannot read superblock */
 298                 if (bkgrdflag == 0 &&
 299                     (nflag || (fswritefd = open(filesys, O_WRONLY)) < 0)) {
 300                         fswritefd = -1;
 301                         if (preen)
 302                                 pfatal("NO WRITE ACCESS");
 303                         printf(" (NO WRITE)");
 304                 }
 305                 if ((sblock.fs_flags & FS_GJOURNAL) != 0) {
 306                         if (sblock.fs_clean == 1) {
 307                                 pwarn("FILE SYSTEM CLEAN; SKIPPING CHECKS\n");
 308                                 exit(0);
 309                         }
 310                         if ((sblock.fs_flags & (FS_UNCLEAN | FS_NEEDSFSCK)) == 0) {
 311                                 bufinit();
 312                                 gjournal_check(filesys);
 313                                 if (chkdoreload(mntp) == 0)
 314                                         exit(0);
 315                                 exit(4);
 316                         } else {
 317                                 pfatal(
 318                             "UNEXPECTED INCONSISTENCY, CANNOT RUN FAST FSCK\n");
 319                         }
 320                 }
 321                 close(fsreadfd);
 322                 close(fswritefd);
 323         }
 324         /*
 325          * If we are to do a background check:
 326          *      Get the mount point information of the file system
 327          *      create snapshot file
 328          *      return created snapshot file
 329          *      if not found, clear bkgrdflag and proceed with normal fsck
 330          */
 331         if (bkgrdflag) {
 332                 if (mntp == NULL) {
 333                         bkgrdflag = 0;
 334                         pfatal("NOT MOUNTED, CANNOT RUN IN BACKGROUND\n");
 335                 } else if ((mntp->f_flags & MNT_SOFTDEP) == 0) {
 336                         bkgrdflag = 0;
 337                         pfatal(
 338                           "NOT USING SOFT UPDATES, CANNOT RUN IN BACKGROUND\n");
 339                 } else if ((mntp->f_flags & MNT_RDONLY) != 0) {
 340                         bkgrdflag = 0;
 341                         pfatal("MOUNTED READ-ONLY, CANNOT RUN IN BACKGROUND\n");
 342                 } else if ((fsreadfd = open(filesys, O_RDONLY)) >= 0) {
 343                         if (readsb(0) != 0) {
 344                                 if (sblock.fs_flags & (FS_NEEDSFSCK | FS_SUJ)) {
 345                                         bkgrdflag = 0;
 346                                         pfatal(
 347                         "UNEXPECTED INCONSISTENCY, CANNOT RUN IN BACKGROUND\n");
 348                                 }
 349                                 if ((sblock.fs_flags & FS_UNCLEAN) == 0 &&
 350                                     skipclean && ckclean) {
 351                                         /*
 352                                          * file system is clean;
 353                                          * skip snapshot and report it clean
 354                                          */
 355                                         pwarn(
 356                                         "FILE SYSTEM CLEAN; SKIPPING CHECKS\n");
 357                                         goto clean;
 358                                 }
 359                         }
 360                         close(fsreadfd);
 361                 }
 362                 if (bkgrdflag) {
 363                         snprintf(snapname, sizeof snapname, "%s/.snap",
 364                             mntp->f_mntonname);
 365                         if (stat(snapname, &snapdir) < 0) {
 366                                 if (errno != ENOENT) {
 367                                         bkgrdflag = 0;
 368                                         pfatal(
 369         "CANNOT FIND SNAPSHOT DIRECTORY %s: %s, CANNOT RUN IN BACKGROUND\n",
 370                                             snapname, strerror(errno));
 371                                 } else if ((grp = getgrnam("operator")) == NULL ||
 372                                            mkdir(snapname, 0770) < 0 ||
 373                                            chown(snapname, -1, grp->gr_gid) < 0 ||
 374                                            chmod(snapname, 0770) < 0) {
 375                                         bkgrdflag = 0;
 376                                         pfatal(
 377         "CANNOT CREATE SNAPSHOT DIRECTORY %s: %s, CANNOT RUN IN BACKGROUND\n",
 378                                             snapname, strerror(errno));
 379                                 }
 380                         } else if (!S_ISDIR(snapdir.st_mode)) {
 381                                 bkgrdflag = 0;
 382                                 pfatal(
 383                         "%s IS NOT A DIRECTORY, CANNOT RUN IN BACKGROUND\n",
 384                                     snapname);
 385                         }
 386                 }
 387                 if (bkgrdflag) {
 388                         snprintf(snapname, sizeof snapname,
 389                             "%s/.snap/fsck_snapshot", mntp->f_mntonname);
 390                         build_iovec(&iov, &iovlen, "fstype", "ffs", 4);
 391                         build_iovec(&iov, &iovlen, "from", snapname,
 392                             (size_t)-1);
 393                         build_iovec(&iov, &iovlen, "fspath", mntp->f_mntonname,
 394                             (size_t)-1);
 395                         build_iovec(&iov, &iovlen, "errmsg", errmsg,
 396                             sizeof(errmsg));
 397                         build_iovec(&iov, &iovlen, "update", NULL, 0);
 398                         build_iovec(&iov, &iovlen, "snapshot", NULL, 0);
 399
 400                         while (nmount(iov, iovlen, mntp->f_flags) < 0) {
 401                                 if (errno == EEXIST && unlink(snapname) == 0)
 402                                         continue;
 403                                 bkgrdflag = 0;
 404                                 pfatal("CANNOT CREATE SNAPSHOT %s: %s %s\n",
 405                                     snapname, strerror(errno), errmsg);
 406                                 break;
 407                         }
 408                         if (bkgrdflag != 0)
 409                                 filesys = snapname;
 410                 }
 411         }
 412
 413         switch (setup(filesys)) {
 414         case 0:
 415                 if (preen)
 416                         pfatal("CAN'T CHECK FILE SYSTEM.");
 417                 return (EEXIT);
 418         case -1:
 419         clean:
 420                 pwarn("clean, %ld free ", (long)(sblock.fs_cstotal.cs_nffree +
 421                     sblock.fs_frag * sblock.fs_cstotal.cs_nbfree));
 422                 printf("(%jd frags, %jd blocks, %.1f%% fragmentation)\n",
 423                     (intmax_t)sblock.fs_cstotal.cs_nffree,
 424                     (intmax_t)sblock.fs_cstotal.cs_nbfree,
 425                     sblock.fs_cstotal.cs_nffree * 100.0 / sblock.fs_dsize);
 426                 return (0);
 427         }
 428         /*
 429          * Determine if we can and should do journal recovery.
 430          */
 431         if ((sblock.fs_flags & FS_SUJ) == FS_SUJ) {
 432                 if ((sblock.fs_flags & FS_NEEDSFSCK) != FS_NEEDSFSCK && skipclean) {
 433                         sujrecovery = 1;
 434                         if (suj_check(filesys) == 0) {
 435                                 printf("\n***** FILE SYSTEM MARKED CLEAN *****\n");
 436                                 if (chkdoreload(mntp) == 0)
 437                                         exit(0);
 438                                 exit(4);
 439                         }
 440                         sujrecovery = 0;
 441                         printf("** Skipping journal, falling through to full fsck\n\n");
 442                 }
 443                 if (fswritefd != -1) {
 444                         /*
 445                          * Write the superblock so we don't try to recover the
 446                          * journal on another pass. If this is the only change
 447                          * to the filesystem, we do not want it to be called
 448                          * out as modified.
 449                          */
 450                         sblock.fs_mtime = time(NULL);
 451                         sbdirty();
 452                         ofsmodified = fsmodified;
 453                         flush(fswritefd, &sblk);
 454                         fsmodified = ofsmodified;
 455                 }
 456         }
 457         /*
 458          * If the filesystem was run on an old kernel that did not
 459          * support check hashes, clear the check-hash flags so that
 460          * we do not try to verify them.
 461          */
 462         if ((sblock.fs_flags & FS_METACKHASH) == 0)
 463                 sblock.fs_metackhash = 0;
 464         /*
 465          * If we are running on a kernel that can provide check hashes
 466          * that are not yet enabled for the filesystem and we are
 467          * running manually without the -y flag, offer to add any
 468          * supported check hashes that are not already enabled.
 469          */
 470         ckhashadd = 0;
 471         if (preen == 0 && yflag == 0 && sblock.fs_magic != FS_UFS1_MAGIC &&
 472             fswritefd != -1 && getosreldate() >= P_OSREL_CK_CYLGRP) {
 473                 if ((sblock.fs_metackhash & CK_CYLGRP) == 0 &&
 474                     reply("ADD CYLINDER GROUP CHECK-HASH PROTECTION") != 0) {
 475                         ckhashadd |= CK_CYLGRP;
 476                         sblock.fs_metackhash |= CK_CYLGRP;
 477                 }
 478                 if ((sblock.fs_metackhash & CK_SUPERBLOCK) == 0 &&
 479                     getosreldate() >= P_OSREL_CK_SUPERBLOCK &&
 480                     reply("ADD SUPERBLOCK CHECK-HASH PROTECTION") != 0) {
 481                         ckhashadd |= CK_SUPERBLOCK;
 482                         sblock.fs_metackhash |= CK_SUPERBLOCK;
 483                 }
 484                 if ((sblock.fs_metackhash & CK_INODE) == 0 &&
 485                     getosreldate() >= P_OSREL_CK_INODE &&
 486                     reply("ADD INODE CHECK-HASH PROTECTION") != 0) {
 487                         ckhashadd |= CK_INODE;
 488                         sblock.fs_metackhash |= CK_INODE;
 489                 }
 490 #ifdef notyet
 491                 if ((sblock.fs_metackhash & CK_INDIR) == 0 &&
 492                     getosreldate() >= P_OSREL_CK_INDIR &&
 493                     reply("ADD INDIRECT BLOCK CHECK-HASH PROTECTION") != 0) {
 494                         ckhashadd |= CK_INDIR;
 495                         sblock.fs_metackhash |= CK_INDIR;
 496                 }
 497                 if ((sblock.fs_metackhash & CK_DIR) == 0 &&
 498                     getosreldate() >= P_OSREL_CK_DIR &&
 499                     reply("ADD DIRECTORY CHECK-HASH PROTECTION") != 0) {
 500                         ckhashadd |= CK_DIR;
 501                         sblock.fs_metackhash |= CK_DIR;
 502                 }
 503 #endif /* notyet */
 504                 if (ckhashadd != 0) {
 505                         sblock.fs_flags |= FS_METACKHASH;
 506                         sbdirty();
 507                 }
 508         }
 509         /*
 510          * Cleared if any questions answered no. Used to decide if
 511          * the superblock should be marked clean.
 512          */
 513         resolved = 1;
 514         /*
 515          * 1: scan inodes tallying blocks used
 516          */
 517         if (preen == 0) {
 518                 printf("** Last Mounted on %s\n", sblock.fs_fsmnt);
 519                 if (mntp != NULL && mntp->f_flags & MNT_ROOTFS)
 520                         printf("** Root file system\n");
 521                 printf("** Phase 1 - Check Blocks and Sizes\n");
 522         }
 523         clock_gettime(CLOCK_REALTIME_PRECISE, &startprog);
 524         pass1();
 525         IOstats("Pass1");
 526
 527         /*
 528          * 1b: locate first references to duplicates, if any
 529          */
 530         if (duplist) {
 531                 if (preen || usedsoftdep)
 532                         pfatal("INTERNAL ERROR: dups with %s%s%s",
 533                             preen ? "-p" : "",
 534                             (preen && usedsoftdep) ? " and " : "",
 535                             usedsoftdep ? "softupdates" : "");
 536                 printf("** Phase 1b - Rescan For More DUPS\n");
 537                 pass1b();
 538                 IOstats("Pass1b");
 539         }
 540
 541         /*
 542          * 2: traverse directories from root to mark all connected directories
 543          */
 544         if (preen == 0)
 545                 printf("** Phase 2 - Check Pathnames\n");
 546         pass2();
 547         IOstats("Pass2");
 548
 549         /*
 550          * 3: scan inodes looking for disconnected directories
 551          */
 552         if (preen == 0)
 553                 printf("** Phase 3 - Check Connectivity\n");
 554         pass3();
 555         IOstats("Pass3");
 556
 557         /*
 558          * 4: scan inodes looking for disconnected files; check reference counts
 559          */
 560         if (preen == 0)
 561                 printf("** Phase 4 - Check Reference Counts\n");
 562         pass4();
 563         IOstats("Pass4");
 564
 565         /*
 566          * 5: check and repair resource counts in cylinder groups
 567          */
 568         if (preen == 0)
 569                 printf("** Phase 5 - Check Cyl groups\n");
 570         pass5();
 571         IOstats("Pass5");
 572
 573         /*
 574          * print out summary statistics
 575          */
 576         n_ffree = sblock.fs_cstotal.cs_nffree;
 577         n_bfree = sblock.fs_cstotal.cs_nbfree;
 578         files = maxino - UFS_ROOTINO - sblock.fs_cstotal.cs_nifree - n_files;
 579         blks = n_blks +
 580             sblock.fs_ncg * (cgdmin(&sblock, 0) - cgsblock(&sblock, 0));
 581         blks += cgsblock(&sblock, 0) - cgbase(&sblock, 0);
 582         blks += howmany(sblock.fs_cssize, sblock.fs_fsize);
 583         blks = maxfsblock - (n_ffree + sblock.fs_frag * n_bfree) - blks;
 584         if (bkgrdflag && (files > 0 || blks > 0)) {
 585                 countdirs = sblock.fs_cstotal.cs_ndir - countdirs;
 586                 pwarn("Reclaimed: %ld directories, %jd files, %jd fragments\n",
 587                     countdirs, files - countdirs, blks);
 588         }
 589         pwarn("%ld files, %jd used, %ju free ",
 590             (long)n_files, (intmax_t)n_blks,
 591             (uintmax_t)n_ffree + sblock.fs_frag * n_bfree);
 592         printf("(%ju frags, %ju blocks, %.1f%% fragmentation)\n",
 593             (uintmax_t)n_ffree, (uintmax_t)n_bfree,
 594             n_ffree * 100.0 / sblock.fs_dsize);
 595         if (debug) {
 596                 if (files < 0)
 597                         printf("%jd inodes missing\n", -files);
 598                 if (blks < 0)
 599                         printf("%jd blocks missing\n", -blks);
 600                 if (duplist != NULL) {
 601                         printf("The following duplicate blocks remain:");
 602                         for (dp = duplist; dp; dp = dp->next)
 603                                 printf(" %jd,", (intmax_t)dp->dup);
 604                         printf("\n");
 605                 }
 606         }
 607         duplist = (struct dups *)0;
 608         muldup = (struct dups *)0;
 609         inocleanup();
 610         if (fsmodified) {
 611                 sblock.fs_time = time(NULL);
 612                 sbdirty();
 613         }
 614         if (cvtlevel && (sblk.b_flags & B_DIRTY) != 0) {
 615                 /*
 616                  * Write out the duplicate super blocks
 617                  */
 618                 if (sbput(fswritefd, &sblock, sblock.fs_ncg) == 0)
 619                         fsmodified = 1;
 620         }
 621         if (rerun)
 622                 resolved = 0;
 623
 624         /*
 625          * Check to see if the file system is mounted read-write.
 626          */
 627         if (bkgrdflag == 0 && mntp != NULL && (mntp->f_flags & MNT_RDONLY) == 0)
 628                 resolved = 0;
 629         ckfini(resolved);
 630
 631         if (fsmodified && !preen)
 632                 printf("\n***** FILE SYSTEM WAS MODIFIED *****\n");
 633         if (rerun) {
 634                 if (wantrestart && (restarts++ < 10) &&
 635                     (preen || reply("RESTART")))
 636                         return (ERESTART);
 637                 printf("\n***** PLEASE RERUN FSCK *****\n");
 638         }
 639         if (chkdoreload(mntp) != 0) {
 640                 if (!fsmodified)
 641                         return (0);
 642                 if (!preen)
 643                         printf("\n***** REBOOT NOW *****\n");
 644                 sync();
 645                 return (4);
 646         }
 647         return (rerun ? ERERUN : 0);
 648 }
 649
 650 static int
 651 chkdoreload(struct statfs *mntp)
 652 {
 653         struct iovec *iov;
 654         int iovlen;
 655         char errmsg[255];
 656
 657         if (mntp == NULL)
 658                 return (0);
 659
 660         iov = NULL;
 661         iovlen = 0;
 662         errmsg[0] = '\0';
 663         /*
 664          * We modified a mounted file system.  Do a mount update on
 665          * it unless it is read-write, so we can continue using it
 666          * as safely as possible.
 667          */
 668         if (mntp->f_flags & MNT_RDONLY) {
 669                 build_iovec(&iov, &iovlen, "fstype", "ffs", 4);
 670                 build_iovec(&iov, &iovlen, "from", mntp->f_mntfromname,
 671                     (size_t)-1);
 672                 build_iovec(&iov, &iovlen, "fspath", mntp->f_mntonname,
 673                     (size_t)-1);
 674                 build_iovec(&iov, &iovlen, "errmsg", errmsg,
 675                     sizeof(errmsg));
 676                 build_iovec(&iov, &iovlen, "update", NULL, 0);
 677                 build_iovec(&iov, &iovlen, "reload", NULL, 0);
 678                 /*
 679                  * XX: We need the following line until we clean up
 680                  * nmount parsing of root mounts and NFS root mounts.
 681                  */
 682                 build_iovec(&iov, &iovlen, "ro", NULL, 0);
 683                 if (nmount(iov, iovlen, mntp->f_flags) == 0) {
 684                         return (0);
 685                 }
 686                 pwarn("mount reload of '%s' failed: %s %s\n\n",
 687                     mntp->f_mntonname, strerror(errno), errmsg);
 688                 return (1);
 689         }
 690         return (0);
 691 }
 692
 693 /*
 694  * Get the mount point information for name.
 695  */
 696 static struct statfs *
 697 getmntpt(const char *name)
 698 {
 699         struct stat devstat, mntdevstat;
 700         char device[sizeof(_PATH_DEV) - 1 + MNAMELEN];
 701         char *ddevname;
 702         struct statfs *mntbuf, *statfsp;
 703         int i, mntsize, isdev;
 704
 705         if (stat(name, &devstat) != 0)
 706                 return (NULL);
 707         if (S_ISCHR(devstat.st_mode) || S_ISBLK(devstat.st_mode))
 708                 isdev = 1;
 709         else
 710                 isdev = 0;
 711         mntsize = getmntinfo(&mntbuf, MNT_NOWAIT);
 712         for (i = 0; i < mntsize; i++) {
 713                 statfsp = &mntbuf[i];
 714                 ddevname = statfsp->f_mntfromname;
 715                 if (*ddevname != '/') {
 716                         if (strlen(_PATH_DEV) + strlen(ddevname) + 1 >
 717                             sizeof(statfsp->f_mntfromname))
 718                                 continue;
 719                         strcpy(device, _PATH_DEV);
 720                         strcat(device, ddevname);
 721                         strcpy(statfsp->f_mntfromname, device);
 722                 }
 723                 if (isdev == 0) {
 724                         if (strcmp(name, statfsp->f_mntonname))
 725                                 continue;
 726                         return (statfsp);
 727                 }
 728                 if (stat(ddevname, &mntdevstat) == 0 &&
 729                     mntdevstat.st_rdev == devstat.st_rdev)
 730                         return (statfsp);
 731         }
 732         statfsp = NULL;
 733         return (statfsp);
 734 }
 735
 736 static void
 737 usage(void)
 738 {
 739         (void) fprintf(stderr,
 740 "usage: %s [-BCdEFfnpRrSyZ] [-b block] [-c level] [-m mode] filesystem ...\n",
 741             getprogname());
 742         exit(1);
 743 }
 744
 745 void
 746 infohandler(int sig __unused)
 747 {
 748         got_siginfo = 1;
 749 }
 750
 751 void
 752 alarmhandler(int sig __unused)
 753 {
 754         got_sigalarm = 1;
 755 }