1 /* 2 * Copyright (c) 1980, 1986, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 4. Neither the name of the University nor the names of its contributors 14 * may be used to endorse or promote products derived from this software 15 * without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 */ 29 30 #if 0 31 #ifndef lint 32 static const char copyright[] = 33 "@(#) Copyright (c) 1980, 1986, 1993\n\ 34 The Regents of the University of California. All rights reserved.\n"; 35 #endif /* not lint */ 36 37 #ifndef lint 38 static char sccsid[] = "@(#)main.c 8.6 (Berkeley) 5/14/95"; 39 #endif /* not lint */ 40 #endif 41 #include <sys/cdefs.h> 42 __FBSDID("$FreeBSD$"); 43 44 #include <sys/param.h> 45 #include <sys/file.h> 46 #include <sys/mount.h> 47 #include <sys/resource.h> 48 #include <sys/stat.h> 49 #include <sys/sysctl.h> 50 #include <sys/uio.h> 51 #include <sys/disklabel.h> 52 53 #include <ufs/ufs/dinode.h> 54 #include <ufs/ffs/fs.h> 55 56 #include <err.h> 57 #include <errno.h> 58 #include <fstab.h> 59 #include <grp.h> 60 #include <mntopts.h> 61 #include <paths.h> 62 #include <stdint.h> 63 #include <string.h> 64 #include <time.h> 65 66 #include "fsck.h" 67 68 int restarts; 69 70 static void usage(void) __dead2; 71 static int argtoi(int flag, const char *req, const char *str, int base); 72 static int checkfilesys(char *filesys); 73 static int chkdoreload(struct statfs *mntp); 74 static struct statfs *getmntpt(const char *); 75 76 int 77 main(int argc, char *argv[]) 78 { 79 int ch; 80 struct rlimit rlimit; 81 struct itimerval itimerval; 82 int ret = 0; 83 84 sync(); 85 skipclean = 1; 86 inoopt = 0; 87 while ((ch = getopt(argc, argv, "b:Bc:CdEfFm:npRrSyZ")) != -1) { 88 switch (ch) { 89 case 'b': 90 skipclean = 0; 91 bflag = argtoi('b', "number", optarg, 10); 92 printf("Alternate super block location: %d\n", bflag); 93 break; 94 95 case 'B': 96 bkgrdflag = 1; 97 break; 98 99 case 'c': 100 skipclean = 0; 101 cvtlevel = argtoi('c', "conversion level", optarg, 10); 102 if (cvtlevel < 3) 103 errx(EEXIT, "cannot do level %d conversion", 104 cvtlevel); 105 break; 106 107 case 'd': 108 debug++; 109 break; 110 111 case 'E': 112 Eflag++; 113 break; 114 115 case 'f': 116 skipclean = 0; 117 break; 118 119 case 'F': 120 bkgrdcheck = 1; 121 break; 122 123 case 'm': 124 lfmode = argtoi('m', "mode", optarg, 8); 125 if (lfmode &~ 07777) 126 errx(EEXIT, "bad mode to -m: %o", lfmode); 127 printf("** lost+found creation mode %o\n", lfmode); 128 break; 129 130 case 'n': 131 nflag++; 132 yflag = 0; 133 break; 134 135 case 'p': 136 preen++; 137 /*FALLTHROUGH*/ 138 139 case 'C': 140 ckclean++; 141 break; 142 143 case 'R': 144 wantrestart = 1; 145 break; 146 case 'r': 147 inoopt++; 148 break; 149 150 case 'S': 151 surrender = 1; 152 break; 153 154 case 'y': 155 yflag++; 156 nflag = 0; 157 break; 158 159 case 'Z': 160 Zflag++; 161 break; 162 163 default: 164 usage(); 165 } 166 } 167 argc -= optind; 168 argv += optind; 169 170 if (!argc) 171 usage(); 172 173 if (signal(SIGINT, SIG_IGN) != SIG_IGN) 174 (void)signal(SIGINT, catch); 175 if (ckclean) 176 (void)signal(SIGQUIT, catchquit); 177 signal(SIGINFO, infohandler); 178 if (bkgrdflag) { 179 signal(SIGALRM, alarmhandler); 180 itimerval.it_interval.tv_sec = 5; 181 itimerval.it_interval.tv_usec = 0; 182 itimerval.it_value.tv_sec = 5; 183 itimerval.it_value.tv_usec = 0; 184 setitimer(ITIMER_REAL, &itimerval, NULL); 185 } 186 /* 187 * Push up our allowed memory limit so we can cope 188 * with huge file systems. 189 */ 190 if (getrlimit(RLIMIT_DATA, &rlimit) == 0) { 191 rlimit.rlim_cur = rlimit.rlim_max; 192 (void)setrlimit(RLIMIT_DATA, &rlimit); 193 } 194 while (argc > 0) { 195 if (checkfilesys(*argv) == ERESTART) 196 continue; 197 argc--; 198 argv++; 199 } 200 201 if (returntosingle) 202 ret = 2; 203 exit(ret); 204 } 205 206 static int 207 argtoi(int flag, const char *req, const char *str, int base) 208 { 209 char *cp; 210 int ret; 211 212 ret = (int)strtol(str, &cp, base); 213 if (cp == str || *cp) 214 errx(EEXIT, "-%c flag requires a %s", flag, req); 215 return (ret); 216 } 217 218 /* 219 * Check the specified file system. 220 */ 221 /* ARGSUSED */ 222 static int 223 checkfilesys(char *filesys) 224 { 225 ufs2_daddr_t n_ffree, n_bfree; 226 struct dups *dp; 227 struct statfs *mntp; 228 struct stat snapdir; 229 struct group *grp; 230 struct iovec *iov; 231 char errmsg[255]; 232 int iovlen; 233 int cylno; 234 intmax_t blks, files; 235 size_t size; 236 237 iov = NULL; 238 iovlen = 0; 239 errmsg[0] = '\0'; 240 fsutilinit(); 241 fsckinit(); 242 243 cdevname = filesys; 244 if (debug && ckclean) 245 pwarn("starting\n"); 246 /* 247 * Make best effort to get the disk name. Check first to see 248 * if it is listed among the mounted file systems. Failing that 249 * check to see if it is listed in /etc/fstab. 250 */ 251 mntp = getmntpt(filesys); 252 if (mntp != NULL) 253 filesys = mntp->f_mntfromname; 254 else 255 filesys = blockcheck(filesys); 256 /* 257 * If -F flag specified, check to see whether a background check 258 * is possible and needed. If possible and needed, exit with 259 * status zero. Otherwise exit with status non-zero. A non-zero 260 * exit status will cause a foreground check to be run. 261 */ 262 sblock_init(); 263 if (bkgrdcheck) { 264 if ((fsreadfd = open(filesys, O_RDONLY)) < 0 || readsb(0) == 0) 265 exit(3); /* Cannot read superblock */ 266 close(fsreadfd); 267 /* Earlier background failed or journaled */ 268 if (sblock.fs_flags & (FS_NEEDSFSCK | FS_SUJ)) 269 exit(4); 270 if ((sblock.fs_flags & FS_DOSOFTDEP) == 0) 271 exit(5); /* Not running soft updates */ 272 size = MIBSIZE; 273 if (sysctlnametomib("vfs.ffs.adjrefcnt", adjrefcnt, &size) < 0) 274 exit(6); /* Lacks kernel support */ 275 if ((mntp == NULL && sblock.fs_clean == 1) || 276 (mntp != NULL && (sblock.fs_flags & FS_UNCLEAN) == 0)) 277 exit(7); /* Filesystem clean, report it now */ 278 exit(0); 279 } 280 if (ckclean && skipclean) { 281 /* 282 * If file system is gjournaled, check it here. 283 */ 284 if ((fsreadfd = open(filesys, O_RDONLY)) < 0 || readsb(0) == 0) 285 exit(3); /* Cannot read superblock */ 286 close(fsreadfd); 287 if ((sblock.fs_flags & FS_GJOURNAL) != 0) { 288 //printf("GJournaled file system detected on %s.\n", 289 // filesys); 290 if (sblock.fs_clean == 1) { 291 pwarn("FILE SYSTEM CLEAN; SKIPPING CHECKS\n"); 292 exit(0); 293 } 294 if ((sblock.fs_flags & (FS_UNCLEAN | FS_NEEDSFSCK)) == 0) { 295 gjournal_check(filesys); 296 if (chkdoreload(mntp) == 0) 297 exit(0); 298 exit(4); 299 } else { 300 pfatal( 301 "UNEXPECTED INCONSISTENCY, CANNOT RUN FAST FSCK\n"); 302 } 303 } 304 } 305 /* 306 * If we are to do a background check: 307 * Get the mount point information of the file system 308 * create snapshot file 309 * return created snapshot file 310 * if not found, clear bkgrdflag and proceed with normal fsck 311 */ 312 if (bkgrdflag) { 313 if (mntp == NULL) { 314 bkgrdflag = 0; 315 pfatal("NOT MOUNTED, CANNOT RUN IN BACKGROUND\n"); 316 } else if ((mntp->f_flags & MNT_SOFTDEP) == 0) { 317 bkgrdflag = 0; 318 pfatal( 319 "NOT USING SOFT UPDATES, CANNOT RUN IN BACKGROUND\n"); 320 } else if ((mntp->f_flags & MNT_RDONLY) != 0) { 321 bkgrdflag = 0; 322 pfatal("MOUNTED READ-ONLY, CANNOT RUN IN BACKGROUND\n"); 323 } else if ((fsreadfd = open(filesys, O_RDONLY)) >= 0) { 324 if (readsb(0) != 0) { 325 if (sblock.fs_flags & (FS_NEEDSFSCK | FS_SUJ)) { 326 bkgrdflag = 0; 327 pfatal( 328 "UNEXPECTED INCONSISTENCY, CANNOT RUN IN BACKGROUND\n"); 329 } 330 if ((sblock.fs_flags & FS_UNCLEAN) == 0 && 331 skipclean && ckclean) { 332 /* 333 * file system is clean; 334 * skip snapshot and report it clean 335 */ 336 pwarn( 337 "FILE SYSTEM CLEAN; SKIPPING CHECKS\n"); 338 goto clean; 339 } 340 } 341 close(fsreadfd); 342 } 343 if (bkgrdflag) { 344 snprintf(snapname, sizeof snapname, "%s/.snap", 345 mntp->f_mntonname); 346 if (stat(snapname, &snapdir) < 0) { 347 if (errno != ENOENT) { 348 bkgrdflag = 0; 349 pfatal( 350 "CANNOT FIND SNAPSHOT DIRECTORY %s: %s, CANNOT RUN IN BACKGROUND\n", 351 snapname, strerror(errno)); 352 } else if ((grp = getgrnam("operator")) == 0 || 353 mkdir(snapname, 0770) < 0 || 354 chown(snapname, -1, grp->gr_gid) < 0 || 355 chmod(snapname, 0770) < 0) { 356 bkgrdflag = 0; 357 pfatal( 358 "CANNOT CREATE SNAPSHOT DIRECTORY %s: %s, CANNOT RUN IN BACKGROUND\n", 359 snapname, strerror(errno)); 360 } 361 } else if (!S_ISDIR(snapdir.st_mode)) { 362 bkgrdflag = 0; 363 pfatal( 364 "%s IS NOT A DIRECTORY, CANNOT RUN IN BACKGROUND\n", 365 snapname); 366 } 367 } 368 if (bkgrdflag) { 369 snprintf(snapname, sizeof snapname, 370 "%s/.snap/fsck_snapshot", mntp->f_mntonname); 371 build_iovec(&iov, &iovlen, "fstype", "ffs", 4); 372 build_iovec(&iov, &iovlen, "from", snapname, 373 (size_t)-1); 374 build_iovec(&iov, &iovlen, "fspath", mntp->f_mntonname, 375 (size_t)-1); 376 build_iovec(&iov, &iovlen, "errmsg", errmsg, 377 sizeof(errmsg)); 378 build_iovec(&iov, &iovlen, "update", NULL, 0); 379 build_iovec(&iov, &iovlen, "snapshot", NULL, 0); 380 381 while (nmount(iov, iovlen, mntp->f_flags) < 0) { 382 if (errno == EEXIST && unlink(snapname) == 0) 383 continue; 384 bkgrdflag = 0; 385 pfatal("CANNOT CREATE SNAPSHOT %s: %s %s\n", 386 snapname, strerror(errno), errmsg); 387 break; 388 } 389 if (bkgrdflag != 0) 390 filesys = snapname; 391 } 392 } 393 394 switch (setup(filesys)) { 395 case 0: 396 if (preen) 397 pfatal("CAN'T CHECK FILE SYSTEM."); 398 return (0); 399 case -1: 400 clean: 401 pwarn("clean, %ld free ", (long)(sblock.fs_cstotal.cs_nffree + 402 sblock.fs_frag * sblock.fs_cstotal.cs_nbfree)); 403 printf("(%jd frags, %jd blocks, %.1f%% fragmentation)\n", 404 (intmax_t)sblock.fs_cstotal.cs_nffree, 405 (intmax_t)sblock.fs_cstotal.cs_nbfree, 406 sblock.fs_cstotal.cs_nffree * 100.0 / sblock.fs_dsize); 407 return (0); 408 } 409 /* 410 * Determine if we can and should do journal recovery. 411 */ 412 if ((sblock.fs_flags & FS_SUJ) == FS_SUJ) { 413 if ((sblock.fs_flags & FS_NEEDSFSCK) != FS_NEEDSFSCK && skipclean) { 414 if (preen || reply("USE JOURNAL")) { 415 if (suj_check(filesys) == 0) { 416 printf("\n***** FILE SYSTEM MARKED CLEAN *****\n"); 417 if (chkdoreload(mntp) == 0) 418 exit(0); 419 exit(4); 420 } 421 } 422 printf("** Skipping journal, falling through to full fsck\n\n"); 423 } 424 /* 425 * Write the superblock so we don't try to recover the 426 * journal on another pass. 427 */ 428 sblock.fs_mtime = time(NULL); 429 sbdirty(); 430 } 431 432 /* 433 * Cleared if any questions answered no. Used to decide if 434 * the superblock should be marked clean. 435 */ 436 resolved = 1; 437 /* 438 * 1: scan inodes tallying blocks used 439 */ 440 if (preen == 0) { 441 printf("** Last Mounted on %s\n", sblock.fs_fsmnt); 442 if (mntp != NULL && mntp->f_flags & MNT_ROOTFS) 443 printf("** Root file system\n"); 444 printf("** Phase 1 - Check Blocks and Sizes\n"); 445 } 446 clock_gettime(CLOCK_REALTIME_PRECISE, &startprog); 447 pass1(); 448 IOstats("Pass1"); 449 450 /* 451 * 1b: locate first references to duplicates, if any 452 */ 453 if (duplist) { 454 if (preen || usedsoftdep) 455 pfatal("INTERNAL ERROR: dups with %s%s%s", 456 preen ? "-p" : "", 457 (preen && usedsoftdep) ? " and " : "", 458 usedsoftdep ? "softupdates" : ""); 459 printf("** Phase 1b - Rescan For More DUPS\n"); 460 pass1b(); 461 IOstats("Pass1b"); 462 } 463 464 /* 465 * 2: traverse directories from root to mark all connected directories 466 */ 467 if (preen == 0) 468 printf("** Phase 2 - Check Pathnames\n"); 469 pass2(); 470 IOstats("Pass2"); 471 472 /* 473 * 3: scan inodes looking for disconnected directories 474 */ 475 if (preen == 0) 476 printf("** Phase 3 - Check Connectivity\n"); 477 pass3(); 478 IOstats("Pass3"); 479 480 /* 481 * 4: scan inodes looking for disconnected files; check reference counts 482 */ 483 if (preen == 0) 484 printf("** Phase 4 - Check Reference Counts\n"); 485 pass4(); 486 IOstats("Pass4"); 487 488 /* 489 * 5: check and repair resource counts in cylinder groups 490 */ 491 if (preen == 0) 492 printf("** Phase 5 - Check Cyl groups\n"); 493 pass5(); 494 IOstats("Pass5"); 495 496 /* 497 * print out summary statistics 498 */ 499 n_ffree = sblock.fs_cstotal.cs_nffree; 500 n_bfree = sblock.fs_cstotal.cs_nbfree; 501 files = maxino - ROOTINO - sblock.fs_cstotal.cs_nifree - n_files; 502 blks = n_blks + 503 sblock.fs_ncg * (cgdmin(&sblock, 0) - cgsblock(&sblock, 0)); 504 blks += cgsblock(&sblock, 0) - cgbase(&sblock, 0); 505 blks += howmany(sblock.fs_cssize, sblock.fs_fsize); 506 blks = maxfsblock - (n_ffree + sblock.fs_frag * n_bfree) - blks; 507 if (bkgrdflag && (files > 0 || blks > 0)) { 508 countdirs = sblock.fs_cstotal.cs_ndir - countdirs; 509 pwarn("Reclaimed: %ld directories, %jd files, %jd fragments\n", 510 countdirs, files - countdirs, blks); 511 } 512 pwarn("%ld files, %jd used, %ju free ", 513 (long)n_files, (intmax_t)n_blks, 514 (uintmax_t)n_ffree + sblock.fs_frag * n_bfree); 515 printf("(%ju frags, %ju blocks, %.1f%% fragmentation)\n", 516 (uintmax_t)n_ffree, (uintmax_t)n_bfree, 517 n_ffree * 100.0 / sblock.fs_dsize); 518 if (debug) { 519 if (files < 0) 520 printf("%jd inodes missing\n", -files); 521 if (blks < 0) 522 printf("%jd blocks missing\n", -blks); 523 if (duplist != NULL) { 524 printf("The following duplicate blocks remain:"); 525 for (dp = duplist; dp; dp = dp->next) 526 printf(" %jd,", (intmax_t)dp->dup); 527 printf("\n"); 528 } 529 } 530 duplist = (struct dups *)0; 531 muldup = (struct dups *)0; 532 inocleanup(); 533 if (fsmodified) { 534 sblock.fs_time = time(NULL); 535 sbdirty(); 536 } 537 if (cvtlevel && sblk.b_dirty) { 538 /* 539 * Write out the duplicate super blocks 540 */ 541 for (cylno = 0; cylno < sblock.fs_ncg; cylno++) 542 blwrite(fswritefd, (char *)&sblock, 543 fsbtodb(&sblock, cgsblock(&sblock, cylno)), 544 SBLOCKSIZE); 545 } 546 if (rerun) 547 resolved = 0; 548 finalIOstats(); 549 550 /* 551 * Check to see if the file system is mounted read-write. 552 */ 553 if (bkgrdflag == 0 && mntp != NULL && (mntp->f_flags & MNT_RDONLY) == 0) 554 resolved = 0; 555 ckfini(resolved); 556 557 for (cylno = 0; cylno < sblock.fs_ncg; cylno++) 558 if (inostathead[cylno].il_stat != NULL) 559 free((char *)inostathead[cylno].il_stat); 560 free((char *)inostathead); 561 inostathead = NULL; 562 if (fsmodified && !preen) 563 printf("\n***** FILE SYSTEM WAS MODIFIED *****\n"); 564 if (rerun) { 565 if (wantrestart && (restarts++ < 10) && 566 (preen || reply("RESTART"))) 567 return (ERESTART); 568 printf("\n***** PLEASE RERUN FSCK *****\n"); 569 } 570 if (chkdoreload(mntp) != 0) { 571 if (!fsmodified) 572 return (0); 573 if (!preen) 574 printf("\n***** REBOOT NOW *****\n"); 575 sync(); 576 return (4); 577 } 578 return (0); 579 } 580 581 static int 582 chkdoreload(struct statfs *mntp) 583 { 584 struct iovec *iov; 585 int iovlen; 586 char errmsg[255]; 587 588 if (mntp == NULL) 589 return (0); 590 591 iov = NULL; 592 iovlen = 0; 593 errmsg[0] = '\0'; 594 /* 595 * We modified a mounted file system. Do a mount update on 596 * it unless it is read-write, so we can continue using it 597 * as safely as possible. 598 */ 599 if (mntp->f_flags & MNT_RDONLY) { 600 build_iovec(&iov, &iovlen, "fstype", "ffs", 4); 601 build_iovec(&iov, &iovlen, "from", mntp->f_mntfromname, 602 (size_t)-1); 603 build_iovec(&iov, &iovlen, "fspath", mntp->f_mntonname, 604 (size_t)-1); 605 build_iovec(&iov, &iovlen, "errmsg", errmsg, 606 sizeof(errmsg)); 607 build_iovec(&iov, &iovlen, "update", NULL, 0); 608 build_iovec(&iov, &iovlen, "reload", NULL, 0); 609 /* 610 * XX: We need the following line until we clean up 611 * nmount parsing of root mounts and NFS root mounts. 612 */ 613 build_iovec(&iov, &iovlen, "ro", NULL, 0); 614 if (nmount(iov, iovlen, mntp->f_flags) == 0) { 615 return (0); 616 } 617 pwarn("mount reload of '%s' failed: %s %s\n\n", 618 mntp->f_mntonname, strerror(errno), errmsg); 619 return (1); 620 } 621 return (0); 622 } 623 624 /* 625 * Get the mount point information for name. 626 */ 627 static struct statfs * 628 getmntpt(const char *name) 629 { 630 struct stat devstat, mntdevstat; 631 char device[sizeof(_PATH_DEV) - 1 + MNAMELEN]; 632 char *ddevname; 633 struct statfs *mntbuf, *statfsp; 634 int i, mntsize, isdev; 635 636 if (stat(name, &devstat) != 0) 637 return (NULL); 638 if (S_ISCHR(devstat.st_mode) || S_ISBLK(devstat.st_mode)) 639 isdev = 1; 640 else 641 isdev = 0; 642 mntsize = getmntinfo(&mntbuf, MNT_NOWAIT); 643 for (i = 0; i < mntsize; i++) { 644 statfsp = &mntbuf[i]; 645 ddevname = statfsp->f_mntfromname; 646 if (*ddevname != '/') { 647 strcpy(device, _PATH_DEV); 648 strcat(device, ddevname); 649 strcpy(statfsp->f_mntfromname, device); 650 } 651 if (isdev == 0) { 652 if (strcmp(name, statfsp->f_mntonname)) 653 continue; 654 return (statfsp); 655 } 656 if (stat(ddevname, &mntdevstat) == 0 && 657 mntdevstat.st_rdev == devstat.st_rdev) 658 return (statfsp); 659 } 660 statfsp = NULL; 661 return (statfsp); 662 } 663 664 static void 665 usage(void) 666 { 667 (void) fprintf(stderr, 668 "usage: %s [-BEFfnpry] [-b block] [-c level] [-m mode] filesystem ...\n", 669 getprogname()); 670 exit(1); 671 } 672 673 void 674 infohandler(int sig __unused) 675 { 676 got_siginfo = 1; 677 } 678 679 void 680 alarmhandler(int sig __unused) 681 { 682 got_sigalarm = 1; 683 } 684