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 (nflag || (fswritefd = open(filesys, O_WRONLY)) < 0) {
 299                         fswritefd = -1;
 300                         if (preen)
 301                                 pfatal("NO WRITE ACCESS");
 302                         printf(" (NO WRITE)");
 303                 }
 304                 if ((sblock.fs_flags & FS_GJOURNAL) != 0) {
 305                         //printf("GJournaled file system detected on %s.\n",
 306                         //    filesys);
 307                         if (sblock.fs_clean == 1) {
 308                                 pwarn("FILE SYSTEM CLEAN; SKIPPING CHECKS\n");
 309                                 exit(0);
 310                         }
 311                         if ((sblock.fs_flags & (FS_UNCLEAN | FS_NEEDSFSCK)) == 0) {
 312                                 bufinit();
 313                                 gjournal_check(filesys);
 314                                 if (chkdoreload(mntp) == 0)
 315                                         exit(0);
 316                                 exit(4);
 317                         } else {
 318                                 pfatal(
 319                             "UNEXPECTED INCONSISTENCY, CANNOT RUN FAST FSCK\n");
 320                                 close(fsreadfd);
 321                                 close(fswritefd);
 322                         }
 323                 }
 324         }
 325         /*
 326          * If we are to do a background check:
 327          *      Get the mount point information of the file system
 328          *      create snapshot file
 329          *      return created snapshot file
 330          *      if not found, clear bkgrdflag and proceed with normal fsck
 331          */
 332         if (bkgrdflag) {
 333                 if (mntp == NULL) {
 334                         bkgrdflag = 0;
 335                         pfatal("NOT MOUNTED, CANNOT RUN IN BACKGROUND\n");
 336                 } else if ((mntp->f_flags & MNT_SOFTDEP) == 0) {
 337                         bkgrdflag = 0;
 338                         pfatal(
 339                           "NOT USING SOFT UPDATES, CANNOT RUN IN BACKGROUND\n");
 340                 } else if ((mntp->f_flags & MNT_RDONLY) != 0) {
 341                         bkgrdflag = 0;
 342                         pfatal("MOUNTED READ-ONLY, CANNOT RUN IN BACKGROUND\n");
 343                 } else if ((fsreadfd = open(filesys, O_RDONLY)) >= 0) {
 344                         if (readsb(0) != 0) {
 345                                 if (sblock.fs_flags & (FS_NEEDSFSCK | FS_SUJ)) {
 346                                         bkgrdflag = 0;
 347                                         pfatal(
 348                         "UNEXPECTED INCONSISTENCY, CANNOT RUN IN BACKGROUND\n");
 349                                 }
 350                                 if ((sblock.fs_flags & FS_UNCLEAN) == 0 &&
 351                                     skipclean && ckclean) {
 352                                         /*
 353                                          * file system is clean;
 354                                          * skip snapshot and report it clean
 355                                          */
 356                                         pwarn(
 357                                         "FILE SYSTEM CLEAN; SKIPPING CHECKS\n");
 358                                         goto clean;
 359                                 }
 360                         }
 361                         close(fsreadfd);
 362                 }
 363                 if (bkgrdflag) {
 364                         snprintf(snapname, sizeof snapname, "%s/.snap",
 365                             mntp->f_mntonname);
 366                         if (stat(snapname, &snapdir) < 0) {
 367                                 if (errno != ENOENT) {
 368                                         bkgrdflag = 0;
 369                                         pfatal(
 370         "CANNOT FIND SNAPSHOT DIRECTORY %s: %s, CANNOT RUN IN BACKGROUND\n",
 371                                             snapname, strerror(errno));
 372                                 } else if ((grp = getgrnam("operator")) == NULL ||
 373                                            mkdir(snapname, 0770) < 0 ||
 374                                            chown(snapname, -1, grp->gr_gid) < 0 ||
 375                                            chmod(snapname, 0770) < 0) {
 376                                         bkgrdflag = 0;
 377                                         pfatal(
 378         "CANNOT CREATE SNAPSHOT DIRECTORY %s: %s, CANNOT RUN IN BACKGROUND\n",
 379                                             snapname, strerror(errno));
 380                                 }
 381                         } else if (!S_ISDIR(snapdir.st_mode)) {
 382                                 bkgrdflag = 0;
 383                                 pfatal(
 384                         "%s IS NOT A DIRECTORY, CANNOT RUN IN BACKGROUND\n",
 385                                     snapname);
 386                         }
 387                 }
 388                 if (bkgrdflag) {
 389                         snprintf(snapname, sizeof snapname,
 390                             "%s/.snap/fsck_snapshot", mntp->f_mntonname);
 391                         build_iovec(&iov, &iovlen, "fstype", "ffs", 4);
 392                         build_iovec(&iov, &iovlen, "from", snapname,
 393                             (size_t)-1);
 394                         build_iovec(&iov, &iovlen, "fspath", mntp->f_mntonname,
 395                             (size_t)-1);
 396                         build_iovec(&iov, &iovlen, "errmsg", errmsg,
 397                             sizeof(errmsg));
 398                         build_iovec(&iov, &iovlen, "update", NULL, 0);
 399                         build_iovec(&iov, &iovlen, "snapshot", NULL, 0);
 400
 401                         while (nmount(iov, iovlen, mntp->f_flags) < 0) {
 402                                 if (errno == EEXIST && unlink(snapname) == 0)
 403                                         continue;
 404                                 bkgrdflag = 0;
 405                                 pfatal("CANNOT CREATE SNAPSHOT %s: %s %s\n",
 406                                     snapname, strerror(errno), errmsg);
 407                                 break;
 408                         }
 409                         if (bkgrdflag != 0)
 410                                 filesys = snapname;
 411                 }
 412         }
 413
 414         switch (setup(filesys)) {
 415         case 0:
 416                 if (preen)
 417                         pfatal("CAN'T CHECK FILE SYSTEM.");
 418                 return (EEXIT);
 419         case -1:
 420         clean:
 421                 pwarn("clean, %ld free ", (long)(sblock.fs_cstotal.cs_nffree +
 422                     sblock.fs_frag * sblock.fs_cstotal.cs_nbfree));
 423                 printf("(%jd frags, %jd blocks, %.1f%% fragmentation)\n",
 424                     (intmax_t)sblock.fs_cstotal.cs_nffree,
 425                     (intmax_t)sblock.fs_cstotal.cs_nbfree,
 426                     sblock.fs_cstotal.cs_nffree * 100.0 / sblock.fs_dsize);
 427                 return (0);
 428         }
 429         /*
 430          * Determine if we can and should do journal recovery.
 431          */
 432         if ((sblock.fs_flags & FS_SUJ) == FS_SUJ) {
 433                 if ((sblock.fs_flags & FS_NEEDSFSCK) != FS_NEEDSFSCK && skipclean) {
 434                         sujrecovery = 1;
 435                         if (suj_check(filesys) == 0) {
 436                                 printf("\n***** FILE SYSTEM MARKED CLEAN *****\n");
 437                                 if (chkdoreload(mntp) == 0)
 438                                         exit(0);
 439                                 exit(4);
 440                         }
 441                         sujrecovery = 0;
 442                         printf("** Skipping journal, falling through to full fsck\n\n");
 443                 }
 444                 if (fswritefd != -1) {
 445                         /*
 446                          * Write the superblock so we don't try to recover the
 447                          * journal on another pass. If this is the only change
 448                          * to the filesystem, we do not want it to be called
 449                          * out as modified.
 450                          */
 451                         sblock.fs_mtime = time(NULL);
 452                         sbdirty();
 453                         ofsmodified = fsmodified;
 454                         flush(fswritefd, &sblk);
 455                         fsmodified = ofsmodified;
 456                 }
 457         }
 458         /*
 459          * If the filesystem was run on an old kernel that did not
 460          * support check hashes, clear the check-hash flags so that
 461          * we do not try to verify them.
 462          */
 463         if ((sblock.fs_flags & FS_METACKHASH) == 0)
 464                 sblock.fs_metackhash = 0;
 465         /*
 466          * If we are running on a kernel that can provide check hashes
 467          * that are not yet enabled for the filesystem and we are
 468          * running manually without the -y flag, offer to add any
 469          * supported check hashes that are not already enabled.
 470          */
 471         ckhashadd = 0;
 472         if (preen == 0 && yflag == 0 && sblock.fs_magic != FS_UFS1_MAGIC &&
 473             fswritefd != -1 && getosreldate() >= P_OSREL_CK_CYLGRP) {
 474                 if ((sblock.fs_metackhash & CK_CYLGRP) == 0 &&
 475                     reply("ADD CYLINDER GROUP CHECK-HASH PROTECTION") != 0) {
 476                         ckhashadd |= CK_CYLGRP;
 477                         sblock.fs_metackhash |= CK_CYLGRP;
 478                 }
 479                 if ((sblock.fs_metackhash & CK_SUPERBLOCK) == 0 &&
 480                     getosreldate() >= P_OSREL_CK_SUPERBLOCK &&
 481                     reply("ADD SUPERBLOCK CHECK-HASH PROTECTION") != 0) {
 482                         ckhashadd |= CK_SUPERBLOCK;
 483                         sblock.fs_metackhash |= CK_SUPERBLOCK;
 484                 }
 485                 if ((sblock.fs_metackhash & CK_INODE) == 0 &&
 486                     getosreldate() >= P_OSREL_CK_INODE &&
 487                     reply("ADD INODE CHECK-HASH PROTECTION") != 0) {
 488                         ckhashadd |= CK_INODE;
 489                         sblock.fs_metackhash |= CK_INODE;
 490                 }
 491 #ifdef notyet
 492                 if ((sblock.fs_metackhash & CK_INDIR) == 0 &&
 493                     getosreldate() >= P_OSREL_CK_INDIR &&
 494                     reply("ADD INDIRECT BLOCK CHECK-HASH PROTECTION") != 0) {
 495                         ckhashadd |= CK_INDIR;
 496                         sblock.fs_metackhash |= CK_INDIR;
 497                 }
 498                 if ((sblock.fs_metackhash & CK_DIR) == 0 &&
 499                     getosreldate() >= P_OSREL_CK_DIR &&
 500                     reply("ADD DIRECTORY CHECK-HASH PROTECTION") != 0) {
 501                         ckhashadd |= CK_DIR;
 502                         sblock.fs_metackhash |= CK_DIR;
 503                 }
 504 #endif /* notyet */
 505                 if (ckhashadd != 0) {
 506                         sblock.fs_flags |= FS_METACKHASH;
 507                         sbdirty();
 508                 }
 509         }
 510         /*
 511          * Cleared if any questions answered no. Used to decide if
 512          * the superblock should be marked clean.
 513          */
 514         resolved = 1;
 515         /*
 516          * 1: scan inodes tallying blocks used
 517          */
 518         if (preen == 0) {
 519                 printf("** Last Mounted on %s\n", sblock.fs_fsmnt);
 520                 if (mntp != NULL && mntp->f_flags & MNT_ROOTFS)
 521                         printf("** Root file system\n");
 522                 printf("** Phase 1 - Check Blocks and Sizes\n");
 523         }
 524         clock_gettime(CLOCK_REALTIME_PRECISE, &startprog);
 525         pass1();
 526         IOstats("Pass1");
 527
 528         /*
 529          * 1b: locate first references to duplicates, if any
 530          */
 531         if (duplist) {
 532                 if (preen || usedsoftdep)
 533                         pfatal("INTERNAL ERROR: dups with %s%s%s",
 534                             preen ? "-p" : "",
 535                             (preen && usedsoftdep) ? " and " : "",
 536                             usedsoftdep ? "softupdates" : "");
 537                 printf("** Phase 1b - Rescan For More DUPS\n");
 538                 pass1b();
 539                 IOstats("Pass1b");
 540         }
 541
 542         /*
 543          * 2: traverse directories from root to mark all connected directories
 544          */
 545         if (preen == 0)
 546                 printf("** Phase 2 - Check Pathnames\n");
 547         pass2();
 548         IOstats("Pass2");
 549
 550         /*
 551          * 3: scan inodes looking for disconnected directories
 552          */
 553         if (preen == 0)
 554                 printf("** Phase 3 - Check Connectivity\n");
 555         pass3();
 556         IOstats("Pass3");
 557
 558         /*
 559          * 4: scan inodes looking for disconnected files; check reference counts
 560          */
 561         if (preen == 0)
 562                 printf("** Phase 4 - Check Reference Counts\n");
 563         pass4();
 564         IOstats("Pass4");
 565
 566         /*
 567          * 5: check and repair resource counts in cylinder groups
 568          */
 569         if (preen == 0)
 570                 printf("** Phase 5 - Check Cyl groups\n");
 571         pass5();
 572         IOstats("Pass5");
 573
 574         /*
 575          * print out summary statistics
 576          */
 577         n_ffree = sblock.fs_cstotal.cs_nffree;
 578         n_bfree = sblock.fs_cstotal.cs_nbfree;
 579         files = maxino - UFS_ROOTINO - sblock.fs_cstotal.cs_nifree - n_files;
 580         blks = n_blks +
 581             sblock.fs_ncg * (cgdmin(&sblock, 0) - cgsblock(&sblock, 0));
 582         blks += cgsblock(&sblock, 0) - cgbase(&sblock, 0);
 583         blks += howmany(sblock.fs_cssize, sblock.fs_fsize);
 584         blks = maxfsblock - (n_ffree + sblock.fs_frag * n_bfree) - blks;
 585         if (bkgrdflag && (files > 0 || blks > 0)) {
 586                 countdirs = sblock.fs_cstotal.cs_ndir - countdirs;
 587                 pwarn("Reclaimed: %ld directories, %jd files, %jd fragments\n",
 588                     countdirs, files - countdirs, blks);
 589         }
 590         pwarn("%ld files, %jd used, %ju free ",
 591             (long)n_files, (intmax_t)n_blks,
 592             (uintmax_t)n_ffree + sblock.fs_frag * n_bfree);
 593         printf("(%ju frags, %ju blocks, %.1f%% fragmentation)\n",
 594             (uintmax_t)n_ffree, (uintmax_t)n_bfree,
 595             n_ffree * 100.0 / sblock.fs_dsize);
 596         if (debug) {
 597                 if (files < 0)
 598                         printf("%jd inodes missing\n", -files);
 599                 if (blks < 0)
 600                         printf("%jd blocks missing\n", -blks);
 601                 if (duplist != NULL) {
 602                         printf("The following duplicate blocks remain:");
 603                         for (dp = duplist; dp; dp = dp->next)
 604                                 printf(" %jd,", (intmax_t)dp->dup);
 605                         printf("\n");
 606                 }
 607         }
 608         duplist = (struct dups *)0;
 609         muldup = (struct dups *)0;
 610         inocleanup();
 611         if (fsmodified) {
 612                 sblock.fs_time = time(NULL);
 613                 sbdirty();
 614         }
 615         if (cvtlevel && (sblk.b_flags & B_DIRTY) != 0) {
 616                 /*
 617                  * Write out the duplicate super blocks
 618                  */
 619                 if (sbput(fswritefd, &sblock, sblock.fs_ncg) == 0)
 620                         fsmodified = 1;
 621         }
 622         if (rerun)
 623                 resolved = 0;
 624
 625         /*
 626          * Check to see if the file system is mounted read-write.
 627          */
 628         if (bkgrdflag == 0 && mntp != NULL && (mntp->f_flags & MNT_RDONLY) == 0)
 629                 resolved = 0;
 630         ckfini(resolved);
 631
 632         if (fsmodified && !preen)
 633                 printf("\n***** FILE SYSTEM WAS MODIFIED *****\n");
 634         if (rerun) {
 635                 if (wantrestart && (restarts++ < 10) &&
 636                     (preen || reply("RESTART")))
 637                         return (ERESTART);
 638                 printf("\n***** PLEASE RERUN FSCK *****\n");
 639         }
 640         if (chkdoreload(mntp) != 0) {
 641                 if (!fsmodified)
 642                         return (0);
 643                 if (!preen)
 644                         printf("\n***** REBOOT NOW *****\n");
 645                 sync();
 646                 return (4);
 647         }
 648         return (rerun ? ERERUN : 0);
 649 }
 650
 651 static int
 652 chkdoreload(struct statfs *mntp)
 653 {
 654         struct iovec *iov;
 655         int iovlen;
 656         char errmsg[255];
 657
 658         if (mntp == NULL)
 659                 return (0);
 660
 661         iov = NULL;
 662         iovlen = 0;
 663         errmsg[0] = '\0';
 664         /*
 665          * We modified a mounted file system.  Do a mount update on
 666          * it unless it is read-write, so we can continue using it
 667          * as safely as possible.
 668          */
 669         if (mntp->f_flags & MNT_RDONLY) {
 670                 build_iovec(&iov, &iovlen, "fstype", "ffs", 4);
 671                 build_iovec(&iov, &iovlen, "from", mntp->f_mntfromname,
 672                     (size_t)-1);
 673                 build_iovec(&iov, &iovlen, "fspath", mntp->f_mntonname,
 674                     (size_t)-1);
 675                 build_iovec(&iov, &iovlen, "errmsg", errmsg,
 676                     sizeof(errmsg));
 677                 build_iovec(&iov, &iovlen, "update", NULL, 0);
 678                 build_iovec(&iov, &iovlen, "reload", NULL, 0);
 679                 /*
 680                  * XX: We need the following line until we clean up
 681                  * nmount parsing of root mounts and NFS root mounts.
 682                  */
 683                 build_iovec(&iov, &iovlen, "ro", NULL, 0);
 684                 if (nmount(iov, iovlen, mntp->f_flags) == 0) {
 685                         return (0);
 686                 }
 687                 pwarn("mount reload of '%s' failed: %s %s\n\n",
 688                     mntp->f_mntonname, strerror(errno), errmsg);
 689                 return (1);
 690         }
 691         return (0);
 692 }
 693
 694 /*
 695  * Get the mount point information for name.
 696  */
 697 static struct statfs *
 698 getmntpt(const char *name)
 699 {
 700         struct stat devstat, mntdevstat;
 701         char device[sizeof(_PATH_DEV) - 1 + MNAMELEN];
 702         char *ddevname;
 703         struct statfs *mntbuf, *statfsp;
 704         int i, mntsize, isdev;
 705
 706         if (stat(name, &devstat) != 0)
 707                 return (NULL);
 708         if (S_ISCHR(devstat.st_mode) || S_ISBLK(devstat.st_mode))
 709                 isdev = 1;
 710         else
 711                 isdev = 0;
 712         mntsize = getmntinfo(&mntbuf, MNT_NOWAIT);
 713         for (i = 0; i < mntsize; i++) {
 714                 statfsp = &mntbuf[i];
 715                 ddevname = statfsp->f_mntfromname;
 716                 if (*ddevname != '/') {
 717                         if (strlen(_PATH_DEV) + strlen(ddevname) + 1 >
 718                             sizeof(statfsp->f_mntfromname))
 719                                 continue;
 720                         strcpy(device, _PATH_DEV);
 721                         strcat(device, ddevname);
 722                         strcpy(statfsp->f_mntfromname, device);
 723                 }
 724                 if (isdev == 0) {
 725                         if (strcmp(name, statfsp->f_mntonname))
 726                                 continue;
 727                         return (statfsp);
 728                 }
 729                 if (stat(ddevname, &mntdevstat) == 0 &&
 730                     mntdevstat.st_rdev == devstat.st_rdev)
 731                         return (statfsp);
 732         }
 733         statfsp = NULL;
 734         return (statfsp);
 735 }
 736
 737 static void
 738 usage(void)
 739 {
 740         (void) fprintf(stderr,
 741 "usage: %s [-BCdEFfnpRrSyZ] [-b block] [-c level] [-m mode] filesystem ...\n",
 742             getprogname());
 743         exit(1);
 744 }
 745
 746 void
 747 infohandler(int sig __unused)
 748 {
 749         got_siginfo = 1;
 750 }
 751
 752 void
 753 alarmhandler(int sig __unused)
 754 {
 755         got_sigalarm = 1;
 756 }