main.c revision 253155
1139738Simp/* 2164010Smarcel * Copyright (c) 1980, 1986, 1993 3138140Smarcel * The Regents of the University of California. All rights reserved. 4138140Smarcel * 5138140Smarcel * Redistribution and use in source and binary forms, with or without 6138140Smarcel * modification, are permitted provided that the following conditions 7138140Smarcel * are met: 8138140Smarcel * 1. Redistributions of source code must retain the above copyright 9138140Smarcel * notice, this list of conditions and the following disclaimer. 10138140Smarcel * 2. Redistributions in binary form must reproduce the above copyright 11138140Smarcel * notice, this list of conditions and the following disclaimer in the 12138140Smarcel * documentation and/or other materials provided with the distribution. 13138140Smarcel * 4. Neither the name of the University nor the names of its contributors 14138140Smarcel * may be used to endorse or promote products derived from this software 15138140Smarcel * without specific prior written permission. 16138140Smarcel * 17138140Smarcel * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 18138140Smarcel * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19138140Smarcel * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20138140Smarcel * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 21138140Smarcel * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22138140Smarcel * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23138140Smarcel * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24138140Smarcel * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25138140Smarcel * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26138140Smarcel * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27138140Smarcel * SUCH DAMAGE. 28138140Smarcel */ 29138140Smarcel 30164010Smarcel#if 0 31164010Smarcel#ifndef lint 32138140Smarcelstatic const char copyright[] = 33138140Smarcel"@(#) Copyright (c) 1980, 1986, 1993\n\ 34138140Smarcel The Regents of the University of California. All rights reserved.\n"; 35164010Smarcel#endif /* not lint */ 36138140Smarcel 37164010Smarcel#ifndef lint 38164010Smarcelstatic char sccsid[] = "@(#)main.c 8.6 (Berkeley) 5/14/95"; 39164010Smarcel#endif /* not lint */ 40164010Smarcel#endif 41164010Smarcel#include <sys/cdefs.h> 42164010Smarcel__FBSDID("$FreeBSD: stable/9/sbin/fsck_ffs/main.c 253155 2013-07-10 14:13:37Z des $"); 43164010Smarcel 44164010Smarcel#include <sys/param.h> 45164010Smarcel#include <sys/file.h> 46164010Smarcel#include <sys/mount.h> 47164010Smarcel#include <sys/resource.h> 48219691Smarcel#include <sys/stat.h> 49219691Smarcel#include <sys/sysctl.h> 50164010Smarcel#include <sys/uio.h> 51219691Smarcel#include <sys/disklabel.h> 52219691Smarcel 53164010Smarcel#include <ufs/ufs/dinode.h> 54219691Smarcel#include <ufs/ffs/fs.h> 55219691Smarcel 56219691Smarcel#include <err.h> 57219691Smarcel#include <errno.h> 58219691Smarcel#include <fstab.h> 59219691Smarcel#include <grp.h> 60219691Smarcel#include <mntopts.h> 61219691Smarcel#include <paths.h> 62219691Smarcel#include <stdint.h> 63219691Smarcel#include <string.h> 64219691Smarcel#include <time.h> 65219691Smarcel 66138140Smarcel#include "fsck.h" 67219691Smarcel 68138140Smarcelstatic void usage(void) __dead2; 69219691Smarcelstatic int argtoi(int flag, const char *req, const char *str, int base); 70219691Smarcelstatic int checkfilesys(char *filesys); 71219691Smarcelstatic int chkdoreload(struct statfs *mntp); 72219691Smarcelstatic struct statfs *getmntpt(const char *); 73219691Smarcel 74219691Smarcelint 75219691Smarcelmain(int argc, char *argv[]) 76219691Smarcel{ 77219691Smarcel int ch; 78219691Smarcel struct rlimit rlimit; 79219691Smarcel struct itimerval itimerval; 80219691Smarcel int ret = 0; 81219691Smarcel 82219691Smarcel sync(); 83219691Smarcel skipclean = 1; 84219691Smarcel inoopt = 0; 85219691Smarcel while ((ch = getopt(argc, argv, "b:Bc:CdEfFm:npryZ")) != -1) { 86219691Smarcel switch (ch) { 87219691Smarcel case 'b': 88219691Smarcel skipclean = 0; 89219691Smarcel bflag = argtoi('b', "number", optarg, 10); 90219691Smarcel printf("Alternate super block location: %d\n", bflag); 91219691Smarcel break; 92219691Smarcel 93221269Smarcel case 'B': 94221269Smarcel bkgrdflag = 1; 95221269Smarcel break; 96221269Smarcel 97219691Smarcel case 'c': 98219691Smarcel skipclean = 0; 99219691Smarcel cvtlevel = argtoi('c', "conversion level", optarg, 10); 100219691Smarcel if (cvtlevel < 3) 101219691Smarcel errx(EEXIT, "cannot do level %d conversion", 102219691Smarcel cvtlevel); 103219691Smarcel break; 104219691Smarcel 105219691Smarcel case 'd': 106219691Smarcel debug++; 107219691Smarcel break; 108219691Smarcel 109219691Smarcel case 'E': 110219691Smarcel Eflag++; 111219691Smarcel break; 112219691Smarcel 113219691Smarcel case 'f': 114219691Smarcel skipclean = 0; 115219691Smarcel break; 116219691Smarcel 117219691Smarcel case 'F': 118219691Smarcel bkgrdcheck = 1; 119219691Smarcel break; 120219691Smarcel 121219691Smarcel case 'm': 122219691Smarcel lfmode = argtoi('m', "mode", optarg, 8); 123219691Smarcel if (lfmode &~ 07777) 124219691Smarcel errx(EEXIT, "bad mode to -m: %o", lfmode); 125219691Smarcel printf("** lost+found creation mode %o\n", lfmode); 126219691Smarcel break; 127219691Smarcel 128219691Smarcel case 'n': 129219691Smarcel nflag++; 130219691Smarcel yflag = 0; 131219691Smarcel break; 132219691Smarcel 133219691Smarcel case 'p': 134219691Smarcel preen++; 135219691Smarcel /*FALLTHROUGH*/ 136219691Smarcel 137219691Smarcel case 'C': 138219691Smarcel ckclean++; 139219691Smarcel break; 140219691Smarcel 141219691Smarcel case 'r': 142219691Smarcel inoopt++; 143219691Smarcel break; 144219691Smarcel 145164010Smarcel case 'y': 146138140Smarcel yflag++; 147164010Smarcel nflag = 0; 148219691Smarcel break; 149219691Smarcel 150219691Smarcel case 'Z': 151221269Smarcel Zflag++; 152219691Smarcel break; 153219691Smarcel 154219691Smarcel default: 155219691Smarcel usage(); 156221269Smarcel } 157219691Smarcel } 158219691Smarcel argc -= optind; 159219691Smarcel argv += optind; 160219691Smarcel 161219691Smarcel if (!argc) 162219691Smarcel usage(); 163219691Smarcel 164221269Smarcel if (signal(SIGINT, SIG_IGN) != SIG_IGN) 165219691Smarcel (void)signal(SIGINT, catch); 166219691Smarcel if (ckclean) 167219691Smarcel (void)signal(SIGQUIT, catchquit); 168219691Smarcel signal(SIGINFO, infohandler); 169219691Smarcel if (bkgrdflag) { 170219691Smarcel signal(SIGALRM, alarmhandler); 171219691Smarcel itimerval.it_interval.tv_sec = 5; 172219691Smarcel itimerval.it_interval.tv_usec = 0; 173219691Smarcel itimerval.it_value.tv_sec = 5; 174219691Smarcel itimerval.it_value.tv_usec = 0; 175219691Smarcel setitimer(ITIMER_REAL, &itimerval, NULL); 176219691Smarcel } 177221269Smarcel /* 178221269Smarcel * Push up our allowed memory limit so we can cope 179219691Smarcel * with huge file systems. 180219691Smarcel */ 181219691Smarcel if (getrlimit(RLIMIT_DATA, &rlimit) == 0) { 182219691Smarcel rlimit.rlim_cur = rlimit.rlim_max; 183219691Smarcel (void)setrlimit(RLIMIT_DATA, &rlimit); 184219691Smarcel } 185219691Smarcel while (argc-- > 0) 186219691Smarcel (void)checkfilesys(*argv++); 187219691Smarcel 188164010Smarcel if (returntosingle) 189219691Smarcel ret = 2; 190164010Smarcel exit(ret); 191164010Smarcel} 192164010Smarcel 193164010Smarcelstatic int 194219691Smarcelargtoi(int flag, const char *req, const char *str, int base) 195164010Smarcel{ 196164010Smarcel char *cp; 197164010Smarcel int ret; 198164010Smarcel 199164010Smarcel ret = (int)strtol(str, &cp, base); 200164010Smarcel if (cp == str || *cp) 201164010Smarcel errx(EEXIT, "-%c flag requires a %s", flag, req); 202164010Smarcel return (ret); 203164010Smarcel} 204164010Smarcel 205219691Smarcel/* 206164010Smarcel * Check the specified file system. 207164010Smarcel */ 208219691Smarcel/* ARGSUSED */ 209219691Smarcelstatic int 210219691Smarcelcheckfilesys(char *filesys) 211219691Smarcel{ 212164010Smarcel ufs2_daddr_t n_ffree, n_bfree; 213219691Smarcel struct dups *dp; 214219691Smarcel struct statfs *mntp; 215219691Smarcel struct stat snapdir; 216164010Smarcel struct group *grp; 217164010Smarcel ufs2_daddr_t blks; 218164010Smarcel struct iovec *iov; 219164010Smarcel char errmsg[255]; 220219691Smarcel int iovlen; 221164010Smarcel int cylno; 222164010Smarcel ino_t files; 223164010Smarcel size_t size; 224164010Smarcel 225164010Smarcel iov = NULL; 226164010Smarcel iovlen = 0; 227164010Smarcel errmsg[0] = '\0'; 228164010Smarcel 229164010Smarcel cdevname = filesys; 230164010Smarcel if (debug && ckclean) 231164010Smarcel pwarn("starting\n"); 232164010Smarcel /* 233222799Smarcel * Make best effort to get the disk name. Check first to see 234222799Smarcel * if it is listed among the mounted file systems. Failing that 235222799Smarcel * check to see if it is listed in /etc/fstab. 236222799Smarcel */ 237222799Smarcel mntp = getmntpt(filesys); 238222799Smarcel if (mntp != NULL) 239222799Smarcel filesys = mntp->f_mntfromname; 240222799Smarcel else 241222799Smarcel filesys = blockcheck(filesys); 242222799Smarcel /* 243222799Smarcel * If -F flag specified, check to see whether a background check 244222799Smarcel * is possible and needed. If possible and needed, exit with 245222799Smarcel * status zero. Otherwise exit with status non-zero. A non-zero 246222799Smarcel * exit status will cause a foreground check to be run. 247222799Smarcel */ 248222799Smarcel sblock_init(); 249222799Smarcel if (bkgrdcheck) { 250222799Smarcel if ((fsreadfd = open(filesys, O_RDONLY)) < 0 || readsb(0) == 0) 251222799Smarcel exit(3); /* Cannot read superblock */ 252222799Smarcel close(fsreadfd); 253222799Smarcel /* Earlier background failed or journaled */ 254222799Smarcel if (sblock.fs_flags & (FS_NEEDSFSCK | FS_SUJ)) 255222799Smarcel exit(4); 256222799Smarcel if ((sblock.fs_flags & FS_DOSOFTDEP) == 0) 257222799Smarcel exit(5); /* Not running soft updates */ 258222799Smarcel size = MIBSIZE; 259222799Smarcel if (sysctlnametomib("vfs.ffs.adjrefcnt", adjrefcnt, &size) < 0) 260222799Smarcel exit(6); /* Lacks kernel support */ 261222799Smarcel if ((mntp == NULL && sblock.fs_clean == 1) || 262222799Smarcel (mntp != NULL && (sblock.fs_flags & FS_UNCLEAN) == 0)) 263222799Smarcel exit(7); /* Filesystem clean, report it now */ 264222799Smarcel exit(0); 265 } 266 if (ckclean && skipclean) { 267 /* 268 * If file system is gjournaled, check it here. 269 */ 270 if ((fsreadfd = open(filesys, O_RDONLY)) < 0 || readsb(0) == 0) 271 exit(3); /* Cannot read superblock */ 272 close(fsreadfd); 273 if ((sblock.fs_flags & FS_GJOURNAL) != 0) { 274 //printf("GJournaled file system detected on %s.\n", 275 // filesys); 276 if (sblock.fs_clean == 1) { 277 pwarn("FILE SYSTEM CLEAN; SKIPPING CHECKS\n"); 278 exit(0); 279 } 280 if ((sblock.fs_flags & (FS_UNCLEAN | FS_NEEDSFSCK)) == 0) { 281 gjournal_check(filesys); 282 if (chkdoreload(mntp) == 0) 283 exit(0); 284 exit(4); 285 } else { 286 pfatal("UNEXPECTED INCONSISTENCY, %s\n", 287 "CANNOT RUN FAST FSCK\n"); 288 } 289 } 290 } 291 /* 292 * If we are to do a background check: 293 * Get the mount point information of the file system 294 * create snapshot file 295 * return created snapshot file 296 * if not found, clear bkgrdflag and proceed with normal fsck 297 */ 298 if (bkgrdflag) { 299 if (mntp == NULL) { 300 bkgrdflag = 0; 301 pfatal("NOT MOUNTED, CANNOT RUN IN BACKGROUND\n"); 302 } else if ((mntp->f_flags & MNT_SOFTDEP) == 0) { 303 bkgrdflag = 0; 304 pfatal("NOT USING SOFT UPDATES, %s\n", 305 "CANNOT RUN IN BACKGROUND"); 306 } else if ((mntp->f_flags & MNT_RDONLY) != 0) { 307 bkgrdflag = 0; 308 pfatal("MOUNTED READ-ONLY, CANNOT RUN IN BACKGROUND\n"); 309 } else if ((fsreadfd = open(filesys, O_RDONLY)) >= 0) { 310 if (readsb(0) != 0) { 311 if (sblock.fs_flags & (FS_NEEDSFSCK | FS_SUJ)) { 312 bkgrdflag = 0; 313 pfatal("UNEXPECTED INCONSISTENCY, %s\n", 314 "CANNOT RUN IN BACKGROUND\n"); 315 } 316 if ((sblock.fs_flags & FS_UNCLEAN) == 0 && 317 skipclean && ckclean) { 318 /* 319 * file system is clean; 320 * skip snapshot and report it clean 321 */ 322 pwarn("FILE SYSTEM CLEAN; %s\n", 323 "SKIPPING CHECKS"); 324 goto clean; 325 } 326 } 327 close(fsreadfd); 328 } 329 if (bkgrdflag) { 330 snprintf(snapname, sizeof snapname, "%s/.snap", 331 mntp->f_mntonname); 332 if (stat(snapname, &snapdir) < 0) { 333 if (errno != ENOENT) { 334 bkgrdflag = 0; 335 pfatal("CANNOT FIND %s %s: %s, %s\n", 336 "SNAPSHOT DIRECTORY", 337 snapname, strerror(errno), 338 "CANNOT RUN IN BACKGROUND"); 339 } else if ((grp = getgrnam("operator")) == 0 || 340 mkdir(snapname, 0770) < 0 || 341 chown(snapname, -1, grp->gr_gid) < 0 || 342 chmod(snapname, 0770) < 0) { 343 bkgrdflag = 0; 344 pfatal("CANNOT CREATE %s %s: %s, %s\n", 345 "SNAPSHOT DIRECTORY", 346 snapname, strerror(errno), 347 "CANNOT RUN IN BACKGROUND"); 348 } 349 } else if (!S_ISDIR(snapdir.st_mode)) { 350 bkgrdflag = 0; 351 pfatal("%s IS NOT A DIRECTORY, %s\n", snapname, 352 "CANNOT RUN IN BACKGROUND"); 353 } 354 } 355 if (bkgrdflag) { 356 snprintf(snapname, sizeof snapname, 357 "%s/.snap/fsck_snapshot", mntp->f_mntonname); 358 build_iovec(&iov, &iovlen, "fstype", "ffs", 4); 359 build_iovec(&iov, &iovlen, "from", snapname, 360 (size_t)-1); 361 build_iovec(&iov, &iovlen, "fspath", mntp->f_mntonname, 362 (size_t)-1); 363 build_iovec(&iov, &iovlen, "errmsg", errmsg, 364 sizeof(errmsg)); 365 build_iovec(&iov, &iovlen, "update", NULL, 0); 366 build_iovec(&iov, &iovlen, "snapshot", NULL, 0); 367 368 while (nmount(iov, iovlen, mntp->f_flags) < 0) { 369 if (errno == EEXIST && unlink(snapname) == 0) 370 continue; 371 bkgrdflag = 0; 372 pfatal("CANNOT CREATE SNAPSHOT %s: %s %s\n", 373 snapname, strerror(errno), errmsg); 374 break; 375 } 376 if (bkgrdflag != 0) 377 filesys = snapname; 378 } 379 } 380 381 switch (setup(filesys)) { 382 case 0: 383 if (preen) 384 pfatal("CAN'T CHECK FILE SYSTEM."); 385 return (0); 386 case -1: 387 clean: 388 pwarn("clean, %ld free ", (long)(sblock.fs_cstotal.cs_nffree + 389 sblock.fs_frag * sblock.fs_cstotal.cs_nbfree)); 390 printf("(%lld frags, %lld blocks, %.1f%% fragmentation)\n", 391 (long long)sblock.fs_cstotal.cs_nffree, 392 (long long)sblock.fs_cstotal.cs_nbfree, 393 sblock.fs_cstotal.cs_nffree * 100.0 / sblock.fs_dsize); 394 return (0); 395 } 396 /* 397 * Determine if we can and should do journal recovery. 398 */ 399 if ((sblock.fs_flags & FS_SUJ) == FS_SUJ) { 400 if ((sblock.fs_flags & FS_NEEDSFSCK) != FS_NEEDSFSCK && skipclean) { 401 if (preen || reply("USE JOURNAL")) { 402 if (suj_check(filesys) == 0) { 403 printf("\n***** FILE SYSTEM MARKED CLEAN *****\n"); 404 if (chkdoreload(mntp) == 0) 405 exit(0); 406 exit(4); 407 } 408 } 409 printf("** Skipping journal, falling through to full fsck\n\n"); 410 } 411 /* 412 * Write the superblock so we don't try to recover the 413 * journal on another pass. 414 */ 415 sblock.fs_mtime = time(NULL); 416 sbdirty(); 417 } 418 419 /* 420 * Cleared if any questions answered no. Used to decide if 421 * the superblock should be marked clean. 422 */ 423 resolved = 1; 424 /* 425 * 1: scan inodes tallying blocks used 426 */ 427 if (preen == 0) { 428 printf("** Last Mounted on %s\n", sblock.fs_fsmnt); 429 if (mntp != NULL && mntp->f_flags & MNT_ROOTFS) 430 printf("** Root file system\n"); 431 printf("** Phase 1 - Check Blocks and Sizes\n"); 432 } 433 clock_gettime(CLOCK_REALTIME_PRECISE, &startprog); 434 pass1(); 435 IOstats("Pass1"); 436 437 /* 438 * 1b: locate first references to duplicates, if any 439 */ 440 if (duplist) { 441 if (preen || usedsoftdep) 442 pfatal("INTERNAL ERROR: dups with %s%s%s", 443 preen ? "-p" : "", 444 (preen && usedsoftdep) ? " and " : "", 445 usedsoftdep ? "softupdates" : ""); 446 printf("** Phase 1b - Rescan For More DUPS\n"); 447 pass1b(); 448 IOstats("Pass1b"); 449 } 450 451 /* 452 * 2: traverse directories from root to mark all connected directories 453 */ 454 if (preen == 0) 455 printf("** Phase 2 - Check Pathnames\n"); 456 pass2(); 457 IOstats("Pass2"); 458 459 /* 460 * 3: scan inodes looking for disconnected directories 461 */ 462 if (preen == 0) 463 printf("** Phase 3 - Check Connectivity\n"); 464 pass3(); 465 IOstats("Pass3"); 466 467 /* 468 * 4: scan inodes looking for disconnected files; check reference counts 469 */ 470 if (preen == 0) 471 printf("** Phase 4 - Check Reference Counts\n"); 472 pass4(); 473 IOstats("Pass4"); 474 475 /* 476 * 5: check and repair resource counts in cylinder groups 477 */ 478 if (preen == 0) 479 printf("** Phase 5 - Check Cyl groups\n"); 480 pass5(); 481 IOstats("Pass5"); 482 483 /* 484 * print out summary statistics 485 */ 486 n_ffree = sblock.fs_cstotal.cs_nffree; 487 n_bfree = sblock.fs_cstotal.cs_nbfree; 488 files = maxino - ROOTINO - sblock.fs_cstotal.cs_nifree - n_files; 489 blks = n_blks + 490 sblock.fs_ncg * (cgdmin(&sblock, 0) - cgsblock(&sblock, 0)); 491 blks += cgsblock(&sblock, 0) - cgbase(&sblock, 0); 492 blks += howmany(sblock.fs_cssize, sblock.fs_fsize); 493 blks = maxfsblock - (n_ffree + sblock.fs_frag * n_bfree) - blks; 494 if (bkgrdflag && (files > 0 || blks > 0)) { 495 countdirs = sblock.fs_cstotal.cs_ndir - countdirs; 496 pwarn("Reclaimed: %ld directories, %ld files, %lld fragments\n", 497 countdirs, (long)files - countdirs, (long long)blks); 498 } 499 pwarn("%ld files, %jd used, %ju free ", 500 (long)n_files, (intmax_t)n_blks, 501 (uintmax_t)n_ffree + sblock.fs_frag * n_bfree); 502 printf("(%ju frags, %ju blocks, %.1f%% fragmentation)\n", 503 (uintmax_t)n_ffree, (uintmax_t)n_bfree, 504 n_ffree * 100.0 / sblock.fs_dsize); 505 if (debug) { 506 if (files < 0) 507 printf("%d inodes missing\n", -files); 508 if (blks < 0) 509 printf("%lld blocks missing\n", -(long long)blks); 510 if (duplist != NULL) { 511 printf("The following duplicate blocks remain:"); 512 for (dp = duplist; dp; dp = dp->next) 513 printf(" %lld,", (long long)dp->dup); 514 printf("\n"); 515 } 516 } 517 duplist = (struct dups *)0; 518 muldup = (struct dups *)0; 519 inocleanup(); 520 if (fsmodified) { 521 sblock.fs_time = time(NULL); 522 sbdirty(); 523 } 524 if (cvtlevel && sblk.b_dirty) { 525 /* 526 * Write out the duplicate super blocks 527 */ 528 for (cylno = 0; cylno < sblock.fs_ncg; cylno++) 529 blwrite(fswritefd, (char *)&sblock, 530 fsbtodb(&sblock, cgsblock(&sblock, cylno)), 531 SBLOCKSIZE); 532 } 533 if (rerun) 534 resolved = 0; 535 finalIOstats(); 536 537 /* 538 * Check to see if the file system is mounted read-write. 539 */ 540 if (bkgrdflag == 0 && mntp != NULL && (mntp->f_flags & MNT_RDONLY) == 0) 541 resolved = 0; 542 ckfini(resolved); 543 544 for (cylno = 0; cylno < sblock.fs_ncg; cylno++) 545 if (inostathead[cylno].il_stat != NULL) 546 free((char *)inostathead[cylno].il_stat); 547 free((char *)inostathead); 548 inostathead = NULL; 549 if (fsmodified && !preen) 550 printf("\n***** FILE SYSTEM WAS MODIFIED *****\n"); 551 if (rerun) 552 printf("\n***** PLEASE RERUN FSCK *****\n"); 553 if (chkdoreload(mntp) != 0) { 554 if (!fsmodified) 555 return (0); 556 if (!preen) 557 printf("\n***** REBOOT NOW *****\n"); 558 sync(); 559 return (4); 560 } 561 return (0); 562} 563 564static int 565chkdoreload(struct statfs *mntp) 566{ 567 struct iovec *iov; 568 int iovlen; 569 char errmsg[255]; 570 571 if (mntp == NULL) 572 return (0); 573 574 iov = NULL; 575 iovlen = 0; 576 errmsg[0] = '\0'; 577 /* 578 * We modified a mounted file system. Do a mount update on 579 * it unless it is read-write, so we can continue using it 580 * as safely as possible. 581 */ 582 if (mntp->f_flags & MNT_RDONLY) { 583 build_iovec(&iov, &iovlen, "fstype", "ffs", 4); 584 build_iovec(&iov, &iovlen, "from", mntp->f_mntfromname, 585 (size_t)-1); 586 build_iovec(&iov, &iovlen, "fspath", mntp->f_mntonname, 587 (size_t)-1); 588 build_iovec(&iov, &iovlen, "errmsg", errmsg, 589 sizeof(errmsg)); 590 build_iovec(&iov, &iovlen, "update", NULL, 0); 591 build_iovec(&iov, &iovlen, "reload", NULL, 0); 592 /* 593 * XX: We need the following line until we clean up 594 * nmount parsing of root mounts and NFS root mounts. 595 */ 596 build_iovec(&iov, &iovlen, "ro", NULL, 0); 597 if (nmount(iov, iovlen, mntp->f_flags) == 0) { 598 return (0); 599 } 600 pwarn("mount reload of '%s' failed: %s %s\n\n", 601 mntp->f_mntonname, strerror(errno), errmsg); 602 return (1); 603 } 604 return (0); 605} 606 607/* 608 * Get the mount point information for name. 609 */ 610static struct statfs * 611getmntpt(const char *name) 612{ 613 struct stat devstat, mntdevstat; 614 char device[sizeof(_PATH_DEV) - 1 + MNAMELEN]; 615 char *ddevname; 616 struct statfs *mntbuf, *statfsp; 617 int i, mntsize, isdev; 618 619 if (stat(name, &devstat) != 0) 620 return (NULL); 621 if (S_ISCHR(devstat.st_mode) || S_ISBLK(devstat.st_mode)) 622 isdev = 1; 623 else 624 isdev = 0; 625 mntsize = getmntinfo(&mntbuf, MNT_NOWAIT); 626 for (i = 0; i < mntsize; i++) { 627 statfsp = &mntbuf[i]; 628 ddevname = statfsp->f_mntfromname; 629 if (*ddevname != '/') { 630 strcpy(device, _PATH_DEV); 631 strcat(device, ddevname); 632 strcpy(statfsp->f_mntfromname, device); 633 } 634 if (isdev == 0) { 635 if (strcmp(name, statfsp->f_mntonname)) 636 continue; 637 return (statfsp); 638 } 639 if (stat(ddevname, &mntdevstat) == 0 && 640 mntdevstat.st_rdev == devstat.st_rdev) 641 return (statfsp); 642 } 643 statfsp = NULL; 644 return (statfsp); 645} 646 647static void 648usage(void) 649{ 650 (void) fprintf(stderr, 651 "usage: %s [-BEFfnpry] [-b block] [-c level] [-m mode] " 652 "filesystem ...\n", 653 getprogname()); 654 exit(1); 655} 656