main.c revision 120901
1187767Sluigi/* 2187767Sluigi * Copyright (c) 1980, 1986, 1993 3187767Sluigi * The Regents of the University of California. All rights reserved. 4187767Sluigi * 5187767Sluigi * Redistribution and use in source and binary forms, with or without 6187767Sluigi * modification, are permitted provided that the following conditions 7187767Sluigi * are met: 8187767Sluigi * 1. Redistributions of source code must retain the above copyright 9187767Sluigi * notice, this list of conditions and the following disclaimer. 10187767Sluigi * 2. Redistributions in binary form must reproduce the above copyright 11187767Sluigi * notice, this list of conditions and the following disclaimer in the 12187767Sluigi * documentation and/or other materials provided with the distribution. 13187767Sluigi * 3. All advertising materials mentioning features or use of this software 14187767Sluigi * must display the following acknowledgement: 15187767Sluigi * This product includes software developed by the University of 16187767Sluigi * California, Berkeley and its contributors. 17187767Sluigi * 4. Neither the name of the University nor the names of its contributors 18187767Sluigi * may be used to endorse or promote products derived from this software 19187767Sluigi * without specific prior written permission. 20187767Sluigi * 21187767Sluigi * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22187767Sluigi * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23187767Sluigi * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24187767Sluigi * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25187767Sluigi * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26187767Sluigi * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27187767Sluigi * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28187767Sluigi * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29187767Sluigi * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30187767Sluigi * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31187767Sluigi * SUCH DAMAGE. 32187767Sluigi */ 33187767Sluigi 34187767Sluigi#if 0 35187767Sluigi#ifndef lint 36187767Sluigistatic const char copyright[] = 37187767Sluigi"@(#) Copyright (c) 1980, 1986, 1993\n\ 38187767Sluigi The Regents of the University of California. All rights reserved.\n"; 39187767Sluigi#endif /* not lint */ 40187767Sluigi 41187767Sluigi#ifndef lint 42187767Sluigistatic char sccsid[] = "@(#)main.c 8.6 (Berkeley) 5/14/95"; 43187767Sluigi#endif /* not lint */ 44187767Sluigi#endif 45187767Sluigi#include <sys/cdefs.h> 46187767Sluigi__FBSDID("$FreeBSD: head/sbin/fsck_ffs/main.c 120901 2003-10-08 02:14:03Z mckusick $"); 47187767Sluigi 48187767Sluigi#include <sys/param.h> 49187767Sluigi#include <sys/stat.h> 50187767Sluigi#include <sys/file.h> 51187767Sluigi#include <sys/time.h> 52187767Sluigi#include <sys/mount.h> 53187767Sluigi#include <sys/resource.h> 54187767Sluigi#include <sys/sysctl.h> 55187767Sluigi#include <sys/disklabel.h> 56187767Sluigi 57187767Sluigi#include <ufs/ufs/dinode.h> 58187767Sluigi#include <ufs/ufs/ufsmount.h> 59187767Sluigi#include <ufs/ffs/fs.h> 60187767Sluigi 61187767Sluigi#include <err.h> 62187767Sluigi#include <errno.h> 63187767Sluigi#include <fstab.h> 64187767Sluigi#include <grp.h> 65187767Sluigi#include <paths.h> 66187767Sluigi#include <stdint.h> 67187767Sluigi#include <string.h> 68187767Sluigi 69187767Sluigi#include "fsck.h" 70187767Sluigi 71187767Sluigistatic void usage(void) __dead2; 72187767Sluigistatic int argtoi(int flag, const char *req, const char *str, int base); 73187767Sluigistatic int checkfilesys(char *filesys); 74187769Sluigistatic struct statfs *getmntpt(const char *); 75187769Sluigi 76187769Sluigiint 77187769Sluigimain(int argc, char *argv[]) 78187769Sluigi{ 79187769Sluigi int ch; 80187769Sluigi struct rlimit rlimit; 81187769Sluigi int ret = 0; 82187769Sluigi 83187769Sluigi sync(); 84187769Sluigi skipclean = 1; 85187769Sluigi while ((ch = getopt(argc, argv, "b:Bc:dfFm:npy")) != -1) { 86187769Sluigi switch (ch) { 87187769Sluigi case 'b': 88187769Sluigi skipclean = 0; 89187769Sluigi bflag = argtoi('b', "number", optarg, 10); 90187769Sluigi printf("Alternate super block location: %d\n", bflag); 91187769Sluigi break; 92187769Sluigi 93187769Sluigi case 'B': 94187769Sluigi bkgrdflag = 1; 95187769Sluigi break; 96187769Sluigi 97187769Sluigi case 'c': 98190633Spiso skipclean = 0; 99187769Sluigi cvtlevel = argtoi('c', "conversion level", optarg, 10); 100187769Sluigi if (cvtlevel < 3) 101187769Sluigi errx(EEXIT, "cannot do level %d conversion", 102187769Sluigi cvtlevel); 103187769Sluigi break; 104187769Sluigi 105187769Sluigi case 'd': 106187769Sluigi debug++; 107187769Sluigi break; 108187769Sluigi 109187769Sluigi case 'f': 110187769Sluigi skipclean = 0; 111187769Sluigi break; 112187769Sluigi 113187769Sluigi case 'F': 114187769Sluigi bkgrdcheck = 1; 115187769Sluigi break; 116187769Sluigi 117187769Sluigi case 'm': 118187769Sluigi lfmode = argtoi('m', "mode", optarg, 8); 119187769Sluigi if (lfmode &~ 07777) 120187769Sluigi errx(EEXIT, "bad mode to -m: %o", lfmode); 121187769Sluigi printf("** lost+found creation mode %o\n", lfmode); 122187769Sluigi break; 123187769Sluigi 124187769Sluigi case 'n': 125187769Sluigi nflag++; 126187769Sluigi yflag = 0; 127187769Sluigi break; 128187769Sluigi 129187769Sluigi case 'p': 130187769Sluigi preen++; 131187769Sluigi break; 132187769Sluigi 133187769Sluigi case 'y': 134187769Sluigi yflag++; 135187769Sluigi nflag = 0; 136187769Sluigi break; 137187769Sluigi 138187769Sluigi default: 139187769Sluigi usage(); 140187769Sluigi } 141187769Sluigi } 142187769Sluigi argc -= optind; 143187769Sluigi argv += optind; 144187769Sluigi 145187769Sluigi if (!argc) 146187769Sluigi usage(); 147187769Sluigi 148187769Sluigi if (signal(SIGINT, SIG_IGN) != SIG_IGN) 149187769Sluigi (void)signal(SIGINT, catch); 150187769Sluigi if (preen) 151187769Sluigi (void)signal(SIGQUIT, catchquit); 152187769Sluigi signal(SIGINFO, infohandler); 153187769Sluigi /* 154187769Sluigi * Push up our allowed memory limit so we can cope 155187769Sluigi * with huge file systems. 156190865Sluigi */ 157194930Soleg if (getrlimit(RLIMIT_DATA, &rlimit) == 0) { 158187769Sluigi rlimit.rlim_cur = rlimit.rlim_max; 159187769Sluigi (void)setrlimit(RLIMIT_DATA, &rlimit); 160187769Sluigi } 161187769Sluigi while (argc-- > 0) 162187769Sluigi (void)checkfilesys(*argv++); 163187769Sluigi 164187769Sluigi if (returntosingle) 165187769Sluigi ret = 2; 166187769Sluigi exit(ret); 167187769Sluigi} 168187769Sluigi 169187769Sluigistatic int 170187769Sluigiargtoi(int flag, const char *req, const char *str, int base) 171187769Sluigi{ 172187769Sluigi char *cp; 173187769Sluigi int ret; 174187769Sluigi 175187769Sluigi ret = (int)strtol(str, &cp, base); 176187769Sluigi if (cp == str || *cp) 177187769Sluigi errx(EEXIT, "-%c flag requires a %s", flag, req); 178187769Sluigi return (ret); 179187769Sluigi} 180187769Sluigi 181187769Sluigi/* 182187769Sluigi * Check the specified file system. 183187769Sluigi */ 184187769Sluigi/* ARGSUSED */ 185187769Sluigistatic int 186187769Sluigicheckfilesys(char *filesys) 187187769Sluigi{ 188187769Sluigi ufs2_daddr_t n_ffree, n_bfree; 189200567Sluigi struct ufs_args args; 190187769Sluigi struct dups *dp; 191187767Sluigi struct statfs *mntp; 192187767Sluigi struct zlncnt *zlnp; 193187767Sluigi struct stat snapdir; 194187767Sluigi struct group *grp; 195187767Sluigi ufs2_daddr_t blks; 196187767Sluigi int cylno, ret; 197187787Sluigi ino_t files; 198187787Sluigi size_t size; 199187767Sluigi 200187767Sluigi cdevname = filesys; 201187767Sluigi if (debug && preen) 202187767Sluigi pwarn("starting\n"); 203187770Sluigi /* 204187767Sluigi * Make best effort to get the disk name. Check first to see 205187769Sluigi * if it is listed among the mounted file systems. Failing that 206187767Sluigi * check to see if it is listed in /etc/fstab. 207187770Sluigi */ 208187769Sluigi mntp = getmntpt(filesys); 209187770Sluigi if (mntp != NULL) 210187770Sluigi filesys = mntp->f_mntfromname; 211187769Sluigi else 212187769Sluigi filesys = blockcheck(filesys); 213187769Sluigi /* 214187769Sluigi * If -F flag specified, check to see whether a background check 215187770Sluigi * is possible and needed. If possible and needed, exit with 216187769Sluigi * status zero. Otherwise exit with status non-zero. A non-zero 217187819Sluigi * exit status will cause a foreground check to be run. 218187819Sluigi */ 219187819Sluigi sblock_init(); 220187819Sluigi if (bkgrdcheck) { 221187819Sluigi if ((fsreadfd = open(filesys, O_RDONLY)) < 0 || readsb(0) == 0) 222187819Sluigi exit(3); /* Cannot read superblock */ 223187819Sluigi close(fsreadfd); 224187819Sluigi if (sblock.fs_flags & FS_NEEDSFSCK) 225187819Sluigi exit(4); /* Earlier background failed */ 226187983Sluigi if ((sblock.fs_flags & FS_DOSOFTDEP) == 0) 227187819Sluigi exit(5); /* Not running soft updates */ 228187819Sluigi size = MIBSIZE; 229187819Sluigi if (sysctlnametomib("vfs.ffs.adjrefcnt", adjrefcnt, &size) < 0) 230187769Sluigi exit(6); /* Lacks kernel support */ 231187767Sluigi if ((mntp == NULL && sblock.fs_clean == 1) || 232187767Sluigi (mntp != NULL && (sblock.fs_flags & FS_UNCLEAN) == 0)) 233187767Sluigi exit(7); /* Filesystem clean, report it now */ 234187767Sluigi exit(0); 235187767Sluigi } 236187767Sluigi /* 237187767Sluigi * If we are to do a background check: 238187770Sluigi * Get the mount point information of the file system 239187767Sluigi * create snapshot file 240187767Sluigi * return created snapshot file 241187767Sluigi * if not found, clear bkgrdflag and proceed with normal fsck 242187767Sluigi */ 243187767Sluigi if (bkgrdflag) { 244187767Sluigi if (mntp == NULL) { 245187767Sluigi bkgrdflag = 0; 246187767Sluigi pfatal("NOT MOUNTED, CANNOT RUN IN BACKGROUND\n"); 247187767Sluigi } else if ((mntp->f_flags & MNT_SOFTDEP) == 0) { 248187767Sluigi bkgrdflag = 0; 249187767Sluigi pfatal("NOT USING SOFT UPDATES, %s\n", 250187767Sluigi "CANNOT RUN IN BACKGROUND"); 251187983Sluigi } else if ((mntp->f_flags & MNT_RDONLY) != 0) { 252187983Sluigi bkgrdflag = 0; 253187983Sluigi pfatal("MOUNTED READ-ONLY, CANNOT RUN IN BACKGROUND\n"); 254187983Sluigi } else if ((fsreadfd = open(filesys, O_RDONLY)) >= 0) { 255187983Sluigi if (readsb(0) != 0) { 256187983Sluigi if (sblock.fs_flags & FS_NEEDSFSCK) { 257187770Sluigi bkgrdflag = 0; 258187769Sluigi pfatal("UNEXPECTED INCONSISTENCY, %s\n", 259187769Sluigi "CANNOT RUN IN BACKGROUND\n"); 260187769Sluigi } 261187770Sluigi if ((sblock.fs_flags & FS_UNCLEAN) == 0 && 262187770Sluigi skipclean && preen) { 263187819Sluigi /* 264187819Sluigi * file system is clean; 265187819Sluigi * skip snapshot and report it clean 266187819Sluigi */ 267187770Sluigi pwarn("FILE SYSTEM CLEAN; %s\n", 268187819Sluigi "SKIPPING CHECKS"); 269187819Sluigi goto clean; 270187770Sluigi } 271187819Sluigi } 272187770Sluigi close(fsreadfd); 273187819Sluigi } 274187819Sluigi if (bkgrdflag) { 275 snprintf(snapname, sizeof snapname, "%s/.snap", 276 mntp->f_mntonname); 277 if (stat(snapname, &snapdir) < 0) { 278 if (errno != ENOENT) { 279 bkgrdflag = 0; 280 pfatal("CANNOT FIND %s %s: %s, %s\n", 281 "SNAPSHOT DIRECTORY", 282 snapname, strerror(errno), 283 "CANNOT RUN IN BACKGROUND"); 284 } else if ((grp = getgrnam("operator")) == 0 || 285 mkdir(snapname, 0770) < 0 || 286 chown(snapname, -1, grp->gr_gid) < 0 || 287 chmod(snapname, 0770) < 0) { 288 bkgrdflag = 0; 289 pfatal("CANNOT CREATE %s %s: %s, %s\n", 290 "SNAPSHOT DIRECTORY", 291 snapname, strerror(errno), 292 "CANNOT RUN IN BACKGROUND"); 293 } 294 } else if (!S_ISDIR(snapdir.st_mode)) { 295 bkgrdflag = 0; 296 pfatal("%s IS NOT A DIRECTORY, %s\n", snapname, 297 "CANNOT RUN IN BACKGROUND"); 298 } 299 } 300 if (bkgrdflag) { 301 snprintf(snapname, sizeof snapname, 302 "%s/.snap/fsck_snapshot", mntp->f_mntonname); 303 args.fspec = snapname; 304 while (mount("ffs", mntp->f_mntonname, 305 mntp->f_flags | MNT_UPDATE | MNT_SNAPSHOT, 306 &args) < 0) { 307 if (errno == EEXIST && unlink(snapname) == 0) 308 continue; 309 bkgrdflag = 0; 310 pfatal("CANNOT CREATE SNAPSHOT %s: %s\n", 311 snapname, strerror(errno)); 312 break; 313 } 314 if (bkgrdflag != 0) 315 filesys = snapname; 316 } 317 } 318 319 switch (setup(filesys)) { 320 case 0: 321 if (preen) 322 pfatal("CAN'T CHECK FILE SYSTEM."); 323 return (0); 324 case -1: 325 clean: 326 pwarn("clean, %ld free ", (long)(sblock.fs_cstotal.cs_nffree + 327 sblock.fs_frag * sblock.fs_cstotal.cs_nbfree)); 328 printf("(%lld frags, %lld blocks, %.1f%% fragmentation)\n", 329 (long long)sblock.fs_cstotal.cs_nffree, 330 (long long)sblock.fs_cstotal.cs_nbfree, 331 sblock.fs_cstotal.cs_nffree * 100.0 / sblock.fs_dsize); 332 return (0); 333 } 334 335 /* 336 * Cleared if any questions answered no. Used to decide if 337 * the superblock should be marked clean. 338 */ 339 resolved = 1; 340 /* 341 * 1: scan inodes tallying blocks used 342 */ 343 if (preen == 0) { 344 printf("** Last Mounted on %s\n", sblock.fs_fsmnt); 345 if (mntp != NULL && mntp->f_flags & MNT_ROOTFS) 346 printf("** Root file system\n"); 347 printf("** Phase 1 - Check Blocks and Sizes\n"); 348 } 349 pass1(); 350 351 /* 352 * 1b: locate first references to duplicates, if any 353 */ 354 if (duplist) { 355 if (preen || usedsoftdep) 356 pfatal("INTERNAL ERROR: dups with -p"); 357 printf("** Phase 1b - Rescan For More DUPS\n"); 358 pass1b(); 359 } 360 361 /* 362 * 2: traverse directories from root to mark all connected directories 363 */ 364 if (preen == 0) 365 printf("** Phase 2 - Check Pathnames\n"); 366 pass2(); 367 368 /* 369 * 3: scan inodes looking for disconnected directories 370 */ 371 if (preen == 0) 372 printf("** Phase 3 - Check Connectivity\n"); 373 pass3(); 374 375 /* 376 * 4: scan inodes looking for disconnected files; check reference counts 377 */ 378 if (preen == 0) 379 printf("** Phase 4 - Check Reference Counts\n"); 380 pass4(); 381 382 /* 383 * 5: check and repair resource counts in cylinder groups 384 */ 385 if (preen == 0) 386 printf("** Phase 5 - Check Cyl groups\n"); 387 pass5(); 388 389 /* 390 * print out summary statistics 391 */ 392 n_ffree = sblock.fs_cstotal.cs_nffree; 393 n_bfree = sblock.fs_cstotal.cs_nbfree; 394 files = maxino - ROOTINO - sblock.fs_cstotal.cs_nifree - n_files; 395 blks = n_blks + 396 sblock.fs_ncg * (cgdmin(&sblock, 0) - cgsblock(&sblock, 0)); 397 blks += cgsblock(&sblock, 0) - cgbase(&sblock, 0); 398 blks += howmany(sblock.fs_cssize, sblock.fs_fsize); 399 blks = maxfsblock - (n_ffree + sblock.fs_frag * n_bfree) - blks; 400 if (bkgrdflag && (files > 0 || blks > 0)) { 401 countdirs = sblock.fs_cstotal.cs_ndir - countdirs; 402 pwarn("Reclaimed: %ld directories, %ld files, %lld fragments\n", 403 countdirs, (long)files - countdirs, (long long)blks); 404 } 405 pwarn("%ld files, %jd used, %ju free ", 406 (long)n_files, (intmax_t)n_blks, 407 (uintmax_t)n_ffree + sblock.fs_frag * n_bfree); 408 printf("(%ju frags, %ju blocks, %.1f%% fragmentation)\n", 409 (uintmax_t)n_ffree, (uintmax_t)n_bfree, 410 n_ffree * 100.0 / sblock.fs_dsize); 411 if (debug) { 412 if (files < 0) 413 printf("%d inodes missing\n", -files); 414 if (blks < 0) 415 printf("%lld blocks missing\n", -(long long)blks); 416 if (duplist != NULL) { 417 printf("The following duplicate blocks remain:"); 418 for (dp = duplist; dp; dp = dp->next) 419 printf(" %lld,", (long long)dp->dup); 420 printf("\n"); 421 } 422 if (zlnhead != NULL) { 423 printf("The following zero link count inodes remain:"); 424 for (zlnp = zlnhead; zlnp; zlnp = zlnp->next) 425 printf(" %u,", zlnp->zlncnt); 426 printf("\n"); 427 } 428 } 429 zlnhead = (struct zlncnt *)0; 430 duplist = (struct dups *)0; 431 muldup = (struct dups *)0; 432 inocleanup(); 433 if (fsmodified) { 434 sblock.fs_time = time(NULL); 435 sbdirty(); 436 } 437 if (cvtlevel && sblk.b_dirty) { 438 /* 439 * Write out the duplicate super blocks 440 */ 441 for (cylno = 0; cylno < sblock.fs_ncg; cylno++) 442 bwrite(fswritefd, (char *)&sblock, 443 fsbtodb(&sblock, cgsblock(&sblock, cylno)), 444 SBLOCKSIZE); 445 } 446 if (rerun) 447 resolved = 0; 448 449 /* 450 * Check to see if the file system is mounted read-write. 451 */ 452 if (bkgrdflag == 0 && mntp != NULL && (mntp->f_flags & MNT_RDONLY) == 0) 453 resolved = 0; 454 ckfini(resolved); 455 456 for (cylno = 0; cylno < sblock.fs_ncg; cylno++) 457 if (inostathead[cylno].il_stat != NULL) 458 free((char *)inostathead[cylno].il_stat); 459 free((char *)inostathead); 460 inostathead = NULL; 461 if (fsmodified && !preen) 462 printf("\n***** FILE SYSTEM WAS MODIFIED *****\n"); 463 if (rerun) 464 printf("\n***** PLEASE RERUN FSCK *****\n"); 465 if (mntp != NULL) { 466 /* 467 * We modified a mounted file system. Do a mount update on 468 * it unless it is read-write, so we can continue using it 469 * as safely as possible. 470 */ 471 if (mntp->f_flags & MNT_RDONLY) { 472 args.fspec = 0; 473 args.export.ex_flags = 0; 474 args.export.ex_root = 0; 475 ret = mount("ufs", mntp->f_mntonname, 476 mntp->f_flags | MNT_UPDATE | MNT_RELOAD, &args); 477 if (ret == 0) 478 return (0); 479 pwarn("mount reload of '%s' failed: %s\n\n", 480 mntp->f_mntonname, strerror(errno)); 481 } 482 if (!fsmodified) 483 return (0); 484 if (!preen) 485 printf("\n***** REBOOT NOW *****\n"); 486 sync(); 487 return (4); 488 } 489 return (0); 490} 491 492/* 493 * Get the mount point information for name. 494 */ 495static struct statfs * 496getmntpt(const char *name) 497{ 498 struct stat devstat, mntdevstat; 499 char device[sizeof(_PATH_DEV) - 1 + MNAMELEN]; 500 char *ddevname; 501 struct statfs *mntbuf, *statfsp; 502 int i, mntsize, isdev; 503 504 if (stat(name, &devstat) != 0) 505 return (NULL); 506 if (S_ISCHR(devstat.st_mode) || S_ISBLK(devstat.st_mode)) 507 isdev = 1; 508 else 509 isdev = 0; 510 mntsize = getmntinfo(&mntbuf, MNT_NOWAIT); 511 for (i = 0; i < mntsize; i++) { 512 statfsp = &mntbuf[i]; 513 ddevname = statfsp->f_mntfromname; 514 if (*ddevname != '/') { 515 strcpy(device, _PATH_DEV); 516 strcat(device, ddevname); 517 strcpy(statfsp->f_mntfromname, device); 518 } 519 if (isdev == 0) { 520 if (strcmp(name, statfsp->f_mntonname)) 521 continue; 522 return (statfsp); 523 } 524 if (stat(ddevname, &mntdevstat) == 0 && 525 mntdevstat.st_rdev == devstat.st_rdev) 526 return (statfsp); 527 } 528 statfsp = NULL; 529 return (statfsp); 530} 531 532static void 533usage(void) 534{ 535 (void) fprintf(stderr, 536 "usage: %s [-BFpfny] [-b block] [-c level] [-m mode] " 537 "file system ...\n", 538 getprogname()); 539 exit(1); 540} 541