main.c revision 249788
1121572Sume/* 262583Sitojun * Copyright (c) 1980, 1986, 1993 355505Sshin * The Regents of the University of California. All rights reserved. 455505Sshin * 555505Sshin * Redistribution and use in source and binary forms, with or without 655505Sshin * modification, are permitted provided that the following conditions 755505Sshin * are met: 855505Sshin * 1. Redistributions of source code must retain the above copyright 955505Sshin * notice, this list of conditions and the following disclaimer. 1055505Sshin * 2. Redistributions in binary form must reproduce the above copyright 1155505Sshin * notice, this list of conditions and the following disclaimer in the 1255505Sshin * documentation and/or other materials provided with the distribution. 1355505Sshin * 4. Neither the name of the University nor the names of its contributors 1455505Sshin * may be used to endorse or promote products derived from this software 1555505Sshin * without specific prior written permission. 1655505Sshin * 1755505Sshin * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 1855505Sshin * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 1955505Sshin * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 2055505Sshin * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 2155505Sshin * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 2255505Sshin * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 2355505Sshin * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 2455505Sshin * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 2555505Sshin * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 2655505Sshin * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 2755505Sshin * SUCH DAMAGE. 2855505Sshin */ 2955505Sshin 3055505Sshin#if 0 3155505Sshin#ifndef lint 3284208Sdillonstatic const char copyright[] = 3384208Sdillon"@(#) Copyright (c) 1980, 1986, 1993\n\ 3484208Sdillon The Regents of the University of California. All rights reserved.\n"; 3555505Sshin#endif /* not lint */ 3655505Sshin 3755505Sshin#ifndef lint 3855505Sshinstatic char sccsid[] = "@(#)main.c 8.6 (Berkeley) 5/14/95"; 39171135Sgnn#endif /* not lint */ 4055505Sshin#endif 41171135Sgnn#include <sys/cdefs.h> 4255505Sshin__FBSDID("$FreeBSD: stable/9/sbin/fsck_ffs/main.c 249788 2013-04-23 06:28:49Z mckusick $"); 4355505Sshin 4455505Sshin#include <sys/param.h> 4562583Sitojun#include <sys/file.h> 4655505Sshin#include <sys/mount.h> 4755505Sshin#include <sys/resource.h> 4855505Sshin#include <sys/stat.h> 4955505Sshin#include <sys/sysctl.h> 5055505Sshin#include <sys/uio.h> 5155505Sshin#include <sys/disklabel.h> 5255505Sshin 5355505Sshin#include <ufs/ufs/dinode.h> 5455505Sshin#include <ufs/ffs/fs.h> 5555505Sshin 5655505Sshin#include <err.h> 5755505Sshin#include <errno.h> 5855505Sshin#include <fstab.h> 5955505Sshin#include <grp.h> 6092941Sobrien#include <mntopts.h> 6192941Sobrien#include <paths.h> 6292941Sobrien#include <stdint.h> 6392917Sobrien#include <string.h> 6455505Sshin#include <time.h> 6555505Sshin 6655505Sshin#include "fsck.h" 6755505Sshin 6855505Sshinstatic void usage(void) __dead2; 6955505Sshinstatic int argtoi(int flag, const char *req, const char *str, int base); 7055505Sshinstatic int checkfilesys(char *filesys); 7155505Sshinstatic int chkdoreload(struct statfs *mntp); 7255505Sshinstatic struct statfs *getmntpt(const char *); 7355505Sshin 7455505Sshinint 7555505Sshinmain(int argc, char *argv[]) 7655505Sshin{ 7762583Sitojun int ch; 7855505Sshin struct rlimit rlimit; 7962583Sitojun struct itimerval itimerval; 8062583Sitojun int ret = 0; 8155505Sshin 8255505Sshin sync(); 8355505Sshin skipclean = 1; 8455505Sshin inoopt = 0; 8555505Sshin while ((ch = getopt(argc, argv, "b:Bc:CdEfFm:npry")) != -1) { 8662583Sitojun switch (ch) { 8755505Sshin case 'b': 8855505Sshin skipclean = 0; 8955505Sshin bflag = argtoi('b', "number", optarg, 10); 9055505Sshin printf("Alternate super block location: %d\n", bflag); 9155505Sshin break; 9255505Sshin 9355505Sshin case 'B': 9455505Sshin bkgrdflag = 1; 9555505Sshin break; 9655505Sshin 9755505Sshin case 'c': 9855505Sshin skipclean = 0; 9955505Sshin cvtlevel = argtoi('c', "conversion level", optarg, 10); 10062583Sitojun if (cvtlevel < 3) 10155505Sshin errx(EEXIT, "cannot do level %d conversion", 10255505Sshin cvtlevel); 10355505Sshin break; 10455505Sshin 10555505Sshin case 'd': 10655505Sshin debug++; 10755505Sshin break; 10855505Sshin 10955505Sshin case 'E': 11055505Sshin Eflag++; 11155505Sshin break; 11262583Sitojun 11355505Sshin case 'f': 11455505Sshin skipclean = 0; 11555505Sshin break; 11655505Sshin 11755505Sshin case 'F': 11855505Sshin bkgrdcheck = 1; 11955505Sshin break; 12055505Sshin 12155505Sshin case 'm': 12262583Sitojun lfmode = argtoi('m', "mode", optarg, 8); 12355505Sshin if (lfmode &~ 07777) 12455505Sshin errx(EEXIT, "bad mode to -m: %o", lfmode); 12562583Sitojun printf("** lost+found creation mode %o\n", lfmode); 12662583Sitojun break; 12755505Sshin 12855505Sshin case 'n': 12962583Sitojun nflag++; 13055505Sshin yflag = 0; 13155505Sshin break; 13255505Sshin 13355505Sshin case 'p': 13462583Sitojun preen++; 13562583Sitojun /*FALLTHROUGH*/ 13662583Sitojun 13762583Sitojun case 'C': 13855505Sshin ckclean++; 13955505Sshin break; 14055505Sshin 14162583Sitojun case 'r': 14262583Sitojun inoopt++; 14355505Sshin break; 14455505Sshin 14555505Sshin case 'y': 14655505Sshin yflag++; 14762583Sitojun nflag = 0; 14862583Sitojun break; 14962583Sitojun 15055505Sshin default: 15162583Sitojun usage(); 15262583Sitojun } 15355505Sshin } 15455505Sshin argc -= optind; 15555505Sshin argv += optind; 15655505Sshin 15762583Sitojun if (!argc) 15862583Sitojun usage(); 15962583Sitojun 16062583Sitojun if (signal(SIGINT, SIG_IGN) != SIG_IGN) 16155505Sshin (void)signal(SIGINT, catch); 16255505Sshin if (ckclean) 16355505Sshin (void)signal(SIGQUIT, catchquit); 16462583Sitojun signal(SIGINFO, infohandler); 165216369Skevlo if (bkgrdflag) { 166216369Skevlo signal(SIGALRM, alarmhandler); 16755505Sshin itimerval.it_interval.tv_sec = 5; 16862583Sitojun itimerval.it_interval.tv_usec = 0; 16962583Sitojun itimerval.it_value.tv_sec = 5; 17055505Sshin itimerval.it_value.tv_usec = 0; 17162583Sitojun setitimer(ITIMER_REAL, &itimerval, NULL); 17262583Sitojun } 17362583Sitojun /* 17455505Sshin * Push up our allowed memory limit so we can cope 17562583Sitojun * with huge file systems. 17662583Sitojun */ 17762583Sitojun if (getrlimit(RLIMIT_DATA, &rlimit) == 0) { 17862583Sitojun rlimit.rlim_cur = rlimit.rlim_max; 17962583Sitojun (void)setrlimit(RLIMIT_DATA, &rlimit); 18062583Sitojun } 18162583Sitojun while (argc-- > 0) 18262583Sitojun (void)checkfilesys(*argv++); 18362583Sitojun 18462583Sitojun if (returntosingle) 18562583Sitojun ret = 2; 18662583Sitojun exit(ret); 18762583Sitojun} 18862583Sitojun 18962583Sitojunstatic int 19062583Sitojunargtoi(int flag, const char *req, const char *str, int base) 19162583Sitojun{ 19262583Sitojun char *cp; 19362583Sitojun int ret; 19462583Sitojun 19562583Sitojun ret = (int)strtol(str, &cp, base); 19662583Sitojun if (cp == str || *cp) 19762583Sitojun errx(EEXIT, "-%c flag requires a %s", flag, req); 19862583Sitojun return (ret); 19962583Sitojun} 200125681Sbms 201125681Sbms/* 202264585Sbrueffer * Check the specified file system. 20362583Sitojun */ 20462583Sitojun/* ARGSUSED */ 20562583Sitojunstatic int 20662583Sitojuncheckfilesys(char *filesys) 20762583Sitojun{ 20862583Sitojun ufs2_daddr_t n_ffree, n_bfree; 20962583Sitojun struct dups *dp; 21062583Sitojun struct statfs *mntp; 21162583Sitojun struct stat snapdir; 21262583Sitojun struct group *grp; 21362583Sitojun ufs2_daddr_t blks; 21462583Sitojun struct iovec *iov; 21562583Sitojun char errmsg[255]; 21662583Sitojun int iovlen; 21762583Sitojun int cylno; 21862583Sitojun ino_t files; 21962583Sitojun size_t size; 22062583Sitojun 22162583Sitojun iov = NULL; 22262583Sitojun iovlen = 0; 22362583Sitojun errmsg[0] = '\0'; 22462583Sitojun 22562583Sitojun cdevname = filesys; 22662583Sitojun if (debug && ckclean) 22762583Sitojun pwarn("starting\n"); 22862583Sitojun /* 22962583Sitojun * Make best effort to get the disk name. Check first to see 23062583Sitojun * if it is listed among the mounted file systems. Failing that 23162583Sitojun * check to see if it is listed in /etc/fstab. 23262583Sitojun */ 23362583Sitojun mntp = getmntpt(filesys); 23455505Sshin if (mntp != NULL) 23555505Sshin filesys = mntp->f_mntfromname; 23662583Sitojun else 23762583Sitojun filesys = blockcheck(filesys); 23862583Sitojun /* 23962583Sitojun * If -F flag specified, check to see whether a background check 24062583Sitojun * is possible and needed. If possible and needed, exit with 24155505Sshin * status zero. Otherwise exit with status non-zero. A non-zero 24262583Sitojun * exit status will cause a foreground check to be run. 24362583Sitojun */ 24462583Sitojun sblock_init(); 24562583Sitojun if (bkgrdcheck) { 24662583Sitojun if ((fsreadfd = open(filesys, O_RDONLY)) < 0 || readsb(0) == 0) 24762583Sitojun exit(3); /* Cannot read superblock */ 24862583Sitojun close(fsreadfd); 24962583Sitojun /* Earlier background failed or journaled */ 25062583Sitojun if (sblock.fs_flags & (FS_NEEDSFSCK | FS_SUJ)) 25162583Sitojun exit(4); 25262583Sitojun if ((sblock.fs_flags & FS_DOSOFTDEP) == 0) 25362583Sitojun exit(5); /* Not running soft updates */ 25462583Sitojun size = MIBSIZE; 25562583Sitojun if (sysctlnametomib("vfs.ffs.adjrefcnt", adjrefcnt, &size) < 0) 25662583Sitojun exit(6); /* Lacks kernel support */ 25762583Sitojun if ((mntp == NULL && sblock.fs_clean == 1) || 25855505Sshin (mntp != NULL && (sblock.fs_flags & FS_UNCLEAN) == 0)) 25955505Sshin exit(7); /* Filesystem clean, report it now */ 26062583Sitojun exit(0); 26162583Sitojun } 26262583Sitojun if (ckclean && skipclean) { 26362583Sitojun /* 26462583Sitojun * If file system is gjournaled, check it here. 26562583Sitojun */ 26662583Sitojun if ((fsreadfd = open(filesys, O_RDONLY)) < 0 || readsb(0) == 0) 26762583Sitojun exit(3); /* Cannot read superblock */ 26862583Sitojun close(fsreadfd); 269121572Sume if ((sblock.fs_flags & FS_GJOURNAL) != 0) { 27062583Sitojun //printf("GJournaled file system detected on %s.\n", 27162583Sitojun // filesys); 27262583Sitojun if (sblock.fs_clean == 1) { 27355505Sshin pwarn("FILE SYSTEM CLEAN; SKIPPING CHECKS\n"); 27455505Sshin exit(0); 27555505Sshin } 27655505Sshin if ((sblock.fs_flags & (FS_UNCLEAN | FS_NEEDSFSCK)) == 0) { 27762583Sitojun gjournal_check(filesys); 27855505Sshin if (chkdoreload(mntp) == 0) 27962583Sitojun exit(0); 28062583Sitojun exit(4); 28162583Sitojun } else { 28255505Sshin pfatal("UNEXPECTED INCONSISTENCY, %s\n", 28362583Sitojun "CANNOT RUN FAST FSCK\n"); 28455505Sshin } 28562583Sitojun } 28662583Sitojun } 28762583Sitojun /* 28862583Sitojun * If we are to do a background check: 28962583Sitojun * Get the mount point information of the file system 29062583Sitojun * create snapshot file 29162583Sitojun * return created snapshot file 29262583Sitojun * if not found, clear bkgrdflag and proceed with normal fsck 29355505Sshin */ 29462583Sitojun if (bkgrdflag) { 29562583Sitojun if (mntp == NULL) { 29662583Sitojun bkgrdflag = 0; 29762583Sitojun pfatal("NOT MOUNTED, CANNOT RUN IN BACKGROUND\n"); 29862583Sitojun } else if ((mntp->f_flags & MNT_SOFTDEP) == 0) { 29962583Sitojun bkgrdflag = 0; 30062583Sitojun pfatal("NOT USING SOFT UPDATES, %s\n", 30155505Sshin "CANNOT RUN IN BACKGROUND"); 30262583Sitojun } else if ((mntp->f_flags & MNT_RDONLY) != 0) { 30362583Sitojun bkgrdflag = 0; 30462583Sitojun pfatal("MOUNTED READ-ONLY, CANNOT RUN IN BACKGROUND\n"); 30562583Sitojun } else if ((fsreadfd = open(filesys, O_RDONLY)) >= 0) { 30662583Sitojun if (readsb(0) != 0) { 30762583Sitojun if (sblock.fs_flags & (FS_NEEDSFSCK | FS_SUJ)) { 30855505Sshin bkgrdflag = 0; 309 pfatal("UNEXPECTED INCONSISTENCY, %s\n", 310 "CANNOT RUN IN BACKGROUND\n"); 311 } 312 if ((sblock.fs_flags & FS_UNCLEAN) == 0 && 313 skipclean && ckclean) { 314 /* 315 * file system is clean; 316 * skip snapshot and report it clean 317 */ 318 pwarn("FILE SYSTEM CLEAN; %s\n", 319 "SKIPPING CHECKS"); 320 goto clean; 321 } 322 } 323 close(fsreadfd); 324 } 325 if (bkgrdflag) { 326 snprintf(snapname, sizeof snapname, "%s/.snap", 327 mntp->f_mntonname); 328 if (stat(snapname, &snapdir) < 0) { 329 if (errno != ENOENT) { 330 bkgrdflag = 0; 331 pfatal("CANNOT FIND %s %s: %s, %s\n", 332 "SNAPSHOT DIRECTORY", 333 snapname, strerror(errno), 334 "CANNOT RUN IN BACKGROUND"); 335 } else if ((grp = getgrnam("operator")) == 0 || 336 mkdir(snapname, 0770) < 0 || 337 chown(snapname, -1, grp->gr_gid) < 0 || 338 chmod(snapname, 0770) < 0) { 339 bkgrdflag = 0; 340 pfatal("CANNOT CREATE %s %s: %s, %s\n", 341 "SNAPSHOT DIRECTORY", 342 snapname, strerror(errno), 343 "CANNOT RUN IN BACKGROUND"); 344 } 345 } else if (!S_ISDIR(snapdir.st_mode)) { 346 bkgrdflag = 0; 347 pfatal("%s IS NOT A DIRECTORY, %s\n", snapname, 348 "CANNOT RUN IN BACKGROUND"); 349 } 350 } 351 if (bkgrdflag) { 352 snprintf(snapname, sizeof snapname, 353 "%s/.snap/fsck_snapshot", mntp->f_mntonname); 354 build_iovec(&iov, &iovlen, "fstype", "ffs", 4); 355 build_iovec(&iov, &iovlen, "from", snapname, 356 (size_t)-1); 357 build_iovec(&iov, &iovlen, "fspath", mntp->f_mntonname, 358 (size_t)-1); 359 build_iovec(&iov, &iovlen, "errmsg", errmsg, 360 sizeof(errmsg)); 361 build_iovec(&iov, &iovlen, "update", NULL, 0); 362 build_iovec(&iov, &iovlen, "snapshot", NULL, 0); 363 364 while (nmount(iov, iovlen, mntp->f_flags) < 0) { 365 if (errno == EEXIST && unlink(snapname) == 0) 366 continue; 367 bkgrdflag = 0; 368 pfatal("CANNOT CREATE SNAPSHOT %s: %s %s\n", 369 snapname, strerror(errno), errmsg); 370 break; 371 } 372 if (bkgrdflag != 0) 373 filesys = snapname; 374 } 375 } 376 377 switch (setup(filesys)) { 378 case 0: 379 if (preen) 380 pfatal("CAN'T CHECK FILE SYSTEM."); 381 return (0); 382 case -1: 383 clean: 384 pwarn("clean, %ld free ", (long)(sblock.fs_cstotal.cs_nffree + 385 sblock.fs_frag * sblock.fs_cstotal.cs_nbfree)); 386 printf("(%lld frags, %lld blocks, %.1f%% fragmentation)\n", 387 (long long)sblock.fs_cstotal.cs_nffree, 388 (long long)sblock.fs_cstotal.cs_nbfree, 389 sblock.fs_cstotal.cs_nffree * 100.0 / sblock.fs_dsize); 390 return (0); 391 } 392 /* 393 * Determine if we can and should do journal recovery. 394 */ 395 if ((sblock.fs_flags & FS_SUJ) == FS_SUJ) { 396 if ((sblock.fs_flags & FS_NEEDSFSCK) != FS_NEEDSFSCK && skipclean) { 397 if (preen || reply("USE JOURNAL")) { 398 if (suj_check(filesys) == 0) { 399 printf("\n***** FILE SYSTEM MARKED CLEAN *****\n"); 400 if (chkdoreload(mntp) == 0) 401 exit(0); 402 exit(4); 403 } 404 } 405 printf("** Skipping journal, falling through to full fsck\n\n"); 406 } 407 /* 408 * Write the superblock so we don't try to recover the 409 * journal on another pass. 410 */ 411 sblock.fs_mtime = time(NULL); 412 sbdirty(); 413 } 414 415 /* 416 * Cleared if any questions answered no. Used to decide if 417 * the superblock should be marked clean. 418 */ 419 resolved = 1; 420 /* 421 * 1: scan inodes tallying blocks used 422 */ 423 if (preen == 0) { 424 printf("** Last Mounted on %s\n", sblock.fs_fsmnt); 425 if (mntp != NULL && mntp->f_flags & MNT_ROOTFS) 426 printf("** Root file system\n"); 427 printf("** Phase 1 - Check Blocks and Sizes\n"); 428 } 429 clock_gettime(CLOCK_REALTIME_PRECISE, &startprog); 430 pass1(); 431 IOstats("Pass1"); 432 433 /* 434 * 1b: locate first references to duplicates, if any 435 */ 436 if (duplist) { 437 if (preen || usedsoftdep) 438 pfatal("INTERNAL ERROR: dups with %s%s%s", 439 preen ? "-p" : "", 440 (preen && usedsoftdep) ? " and " : "", 441 usedsoftdep ? "softupdates" : ""); 442 printf("** Phase 1b - Rescan For More DUPS\n"); 443 pass1b(); 444 IOstats("Pass1b"); 445 } 446 447 /* 448 * 2: traverse directories from root to mark all connected directories 449 */ 450 if (preen == 0) 451 printf("** Phase 2 - Check Pathnames\n"); 452 pass2(); 453 IOstats("Pass2"); 454 455 /* 456 * 3: scan inodes looking for disconnected directories 457 */ 458 if (preen == 0) 459 printf("** Phase 3 - Check Connectivity\n"); 460 pass3(); 461 IOstats("Pass3"); 462 463 /* 464 * 4: scan inodes looking for disconnected files; check reference counts 465 */ 466 if (preen == 0) 467 printf("** Phase 4 - Check Reference Counts\n"); 468 pass4(); 469 IOstats("Pass4"); 470 471 /* 472 * 5: check and repair resource counts in cylinder groups 473 */ 474 if (preen == 0) 475 printf("** Phase 5 - Check Cyl groups\n"); 476 pass5(); 477 IOstats("Pass5"); 478 479 /* 480 * print out summary statistics 481 */ 482 n_ffree = sblock.fs_cstotal.cs_nffree; 483 n_bfree = sblock.fs_cstotal.cs_nbfree; 484 files = maxino - ROOTINO - sblock.fs_cstotal.cs_nifree - n_files; 485 blks = n_blks + 486 sblock.fs_ncg * (cgdmin(&sblock, 0) - cgsblock(&sblock, 0)); 487 blks += cgsblock(&sblock, 0) - cgbase(&sblock, 0); 488 blks += howmany(sblock.fs_cssize, sblock.fs_fsize); 489 blks = maxfsblock - (n_ffree + sblock.fs_frag * n_bfree) - blks; 490 if (bkgrdflag && (files > 0 || blks > 0)) { 491 countdirs = sblock.fs_cstotal.cs_ndir - countdirs; 492 pwarn("Reclaimed: %ld directories, %ld files, %lld fragments\n", 493 countdirs, (long)files - countdirs, (long long)blks); 494 } 495 pwarn("%ld files, %jd used, %ju free ", 496 (long)n_files, (intmax_t)n_blks, 497 (uintmax_t)n_ffree + sblock.fs_frag * n_bfree); 498 printf("(%ju frags, %ju blocks, %.1f%% fragmentation)\n", 499 (uintmax_t)n_ffree, (uintmax_t)n_bfree, 500 n_ffree * 100.0 / sblock.fs_dsize); 501 if (debug) { 502 if (files < 0) 503 printf("%d inodes missing\n", -files); 504 if (blks < 0) 505 printf("%lld blocks missing\n", -(long long)blks); 506 if (duplist != NULL) { 507 printf("The following duplicate blocks remain:"); 508 for (dp = duplist; dp; dp = dp->next) 509 printf(" %lld,", (long long)dp->dup); 510 printf("\n"); 511 } 512 } 513 duplist = (struct dups *)0; 514 muldup = (struct dups *)0; 515 inocleanup(); 516 if (fsmodified) { 517 sblock.fs_time = time(NULL); 518 sbdirty(); 519 } 520 if (cvtlevel && sblk.b_dirty) { 521 /* 522 * Write out the duplicate super blocks 523 */ 524 for (cylno = 0; cylno < sblock.fs_ncg; cylno++) 525 blwrite(fswritefd, (char *)&sblock, 526 fsbtodb(&sblock, cgsblock(&sblock, cylno)), 527 SBLOCKSIZE); 528 } 529 if (rerun) 530 resolved = 0; 531 finalIOstats(); 532 533 /* 534 * Check to see if the file system is mounted read-write. 535 */ 536 if (bkgrdflag == 0 && mntp != NULL && (mntp->f_flags & MNT_RDONLY) == 0) 537 resolved = 0; 538 ckfini(resolved); 539 540 for (cylno = 0; cylno < sblock.fs_ncg; cylno++) 541 if (inostathead[cylno].il_stat != NULL) 542 free((char *)inostathead[cylno].il_stat); 543 free((char *)inostathead); 544 inostathead = NULL; 545 if (fsmodified && !preen) 546 printf("\n***** FILE SYSTEM WAS MODIFIED *****\n"); 547 if (rerun) 548 printf("\n***** PLEASE RERUN FSCK *****\n"); 549 if (chkdoreload(mntp) != 0) { 550 if (!fsmodified) 551 return (0); 552 if (!preen) 553 printf("\n***** REBOOT NOW *****\n"); 554 sync(); 555 return (4); 556 } 557 return (0); 558} 559 560static int 561chkdoreload(struct statfs *mntp) 562{ 563 struct iovec *iov; 564 int iovlen; 565 char errmsg[255]; 566 567 if (mntp == NULL) 568 return (0); 569 570 iov = NULL; 571 iovlen = 0; 572 errmsg[0] = '\0'; 573 /* 574 * We modified a mounted file system. Do a mount update on 575 * it unless it is read-write, so we can continue using it 576 * as safely as possible. 577 */ 578 if (mntp->f_flags & MNT_RDONLY) { 579 build_iovec(&iov, &iovlen, "fstype", "ffs", 4); 580 build_iovec(&iov, &iovlen, "from", mntp->f_mntfromname, 581 (size_t)-1); 582 build_iovec(&iov, &iovlen, "fspath", mntp->f_mntonname, 583 (size_t)-1); 584 build_iovec(&iov, &iovlen, "errmsg", errmsg, 585 sizeof(errmsg)); 586 build_iovec(&iov, &iovlen, "update", NULL, 0); 587 build_iovec(&iov, &iovlen, "reload", NULL, 0); 588 /* 589 * XX: We need the following line until we clean up 590 * nmount parsing of root mounts and NFS root mounts. 591 */ 592 build_iovec(&iov, &iovlen, "ro", NULL, 0); 593 if (nmount(iov, iovlen, mntp->f_flags) == 0) { 594 return (0); 595 } 596 pwarn("mount reload of '%s' failed: %s %s\n\n", 597 mntp->f_mntonname, strerror(errno), errmsg); 598 return (1); 599 } 600 return (0); 601} 602 603/* 604 * Get the mount point information for name. 605 */ 606static struct statfs * 607getmntpt(const char *name) 608{ 609 struct stat devstat, mntdevstat; 610 char device[sizeof(_PATH_DEV) - 1 + MNAMELEN]; 611 char *ddevname; 612 struct statfs *mntbuf, *statfsp; 613 int i, mntsize, isdev; 614 615 if (stat(name, &devstat) != 0) 616 return (NULL); 617 if (S_ISCHR(devstat.st_mode) || S_ISBLK(devstat.st_mode)) 618 isdev = 1; 619 else 620 isdev = 0; 621 mntsize = getmntinfo(&mntbuf, MNT_NOWAIT); 622 for (i = 0; i < mntsize; i++) { 623 statfsp = &mntbuf[i]; 624 ddevname = statfsp->f_mntfromname; 625 if (*ddevname != '/') { 626 strcpy(device, _PATH_DEV); 627 strcat(device, ddevname); 628 strcpy(statfsp->f_mntfromname, device); 629 } 630 if (isdev == 0) { 631 if (strcmp(name, statfsp->f_mntonname)) 632 continue; 633 return (statfsp); 634 } 635 if (stat(ddevname, &mntdevstat) == 0 && 636 mntdevstat.st_rdev == devstat.st_rdev) 637 return (statfsp); 638 } 639 statfsp = NULL; 640 return (statfsp); 641} 642 643static void 644usage(void) 645{ 646 (void) fprintf(stderr, 647 "usage: %s [-BEFfnpry] [-b block] [-c level] [-m mode] " 648 "filesystem ...\n", 649 getprogname()); 650 exit(1); 651} 652