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