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 static void usage(void) __dead2; 69 static int argtoi(int flag, const char *req, const char *str, int base); 70 static int checkfilesys(char *filesys); 71 static int chkdoreload(struct statfs *mntp); 72 static struct statfs *getmntpt(const char *); 73 74 int 75 main(int argc, char *argv[]) 76 { 77 int ch; 78 struct rlimit rlimit; 79 struct itimerval itimerval; 80 int ret = 0; 81 82 sync(); 83 skipclean = 1; 84 inoopt = 0; 85 while ((ch = getopt(argc, argv, "b:Bc:CdEfFm:npry")) != -1) { 86 switch (ch) { 87 case 'b': 88 skipclean = 0; 89 bflag = argtoi('b', "number", optarg, 10); 90 printf("Alternate super block location: %d\n", bflag); 91 break; 92 93 case 'B': 94 bkgrdflag = 1; 95 break; 96 97 case 'c': 98 skipclean = 0; 99 cvtlevel = argtoi('c', "conversion level", optarg, 10); 100 if (cvtlevel < 3) 101 errx(EEXIT, "cannot do level %d conversion", 102 cvtlevel); 103 break; 104 105 case 'd': 106 debug++; 107 break; 108 109 case 'E': 110 Eflag++; 111 break; 112 113 case 'f': 114 skipclean = 0; 115 break; 116 117 case 'F': 118 bkgrdcheck = 1; 119 break; 120 121 case 'm': 122 lfmode = argtoi('m', "mode", optarg, 8); 123 if (lfmode &~ 07777) 124 errx(EEXIT, "bad mode to -m: %o", lfmode); 125 printf("** lost+found creation mode %o\n", lfmode); 126 break; 127 128 case 'n': 129 nflag++; 130 yflag = 0; 131 break; 132 133 case 'p': 134 preen++; 135 /*FALLTHROUGH*/ 136 137 case 'C': 138 ckclean++; 139 break; 140 141 case 'r': 142 inoopt++; 143 break; 144 145 case 'y': 146 yflag++; 147 nflag = 0; 148 break; 149 150 default: 151 usage(); 152 } 153 } 154 argc -= optind; 155 argv += optind; 156 157 if (!argc) 158 usage(); 159 160 if (signal(SIGINT, SIG_IGN) != SIG_IGN) 161 (void)signal(SIGINT, catch); 162 if (ckclean) 163 (void)signal(SIGQUIT, catchquit); 164 signal(SIGINFO, infohandler); 165 if (bkgrdflag) { 166 signal(SIGALRM, alarmhandler); 167 itimerval.it_interval.tv_sec = 5; 168 itimerval.it_interval.tv_usec = 0; 169 itimerval.it_value.tv_sec = 5; 170 itimerval.it_value.tv_usec = 0; 171 setitimer(ITIMER_REAL, &itimerval, NULL); 172 } 173 /* 174 * Push up our allowed memory limit so we can cope 175 * with huge file systems. 176 */ 177 if (getrlimit(RLIMIT_DATA, &rlimit) == 0) { 178 rlimit.rlim_cur = rlimit.rlim_max; 179 (void)setrlimit(RLIMIT_DATA, &rlimit); 180 } 181 while (argc-- > 0) 182 (void)checkfilesys(*argv++); 183 184 if (returntosingle) 185 ret = 2; 186 exit(ret); 187 } 188 189 static int 190 argtoi(int flag, const char *req, const char *str, int base) 191 { 192 char *cp; 193 int ret; 194 195 ret = (int)strtol(str, &cp, base); 196 if (cp == str || *cp) 197 errx(EEXIT, "-%c flag requires a %s", flag, req); 198 return (ret); 199 } 200 201 /* 202 * Check the specified file system. 203 */ 204 /* ARGSUSED */ 205 static int 206 checkfilesys(char *filesys) 207 { 208 ufs2_daddr_t n_ffree, n_bfree; 209 struct dups *dp; 210 struct statfs *mntp; 211 struct stat snapdir; 212 struct group *grp; 213 ufs2_daddr_t blks; 214 struct iovec *iov; 215 char errmsg[255]; 216 int iovlen; 217 int cylno; 218 ino_t files; 219 size_t size; 220 221 iov = NULL; 222 iovlen = 0; 223 errmsg[0] = '\0'; 224 225 cdevname = filesys; 226 if (debug && ckclean) 227 pwarn("starting\n"); 228 /* 229 * Make best effort to get the disk name. Check first to see 230 * if it is listed among the mounted file systems. Failing that 231 * check to see if it is listed in /etc/fstab. 232 */ 233 mntp = getmntpt(filesys); 234 if (mntp != NULL) 235 filesys = mntp->f_mntfromname; 236 else 237 filesys = blockcheck(filesys); 238 /* 239 * If -F flag specified, check to see whether a background check 240 * is possible and needed. If possible and needed, exit with 241 * status zero. Otherwise exit with status non-zero. A non-zero 242 * exit status will cause a foreground check to be run. 243 */ 244 sblock_init(); 245 if (bkgrdcheck) { 246 if ((fsreadfd = open(filesys, O_RDONLY)) < 0 || readsb(0) == 0) 247 exit(3); /* Cannot read superblock */ 248 close(fsreadfd); 249 /* Earlier background failed or journaled */ 250 if (sblock.fs_flags & (FS_NEEDSFSCK | FS_SUJ)) 251 exit(4); 252 if ((sblock.fs_flags & FS_DOSOFTDEP) == 0) 253 exit(5); /* Not running soft updates */ 254 size = MIBSIZE; 255 if (sysctlnametomib("vfs.ffs.adjrefcnt", adjrefcnt, &size) < 0) 256 exit(6); /* Lacks kernel support */ 257 if ((mntp == NULL && sblock.fs_clean == 1) || 258 (mntp != NULL && (sblock.fs_flags & FS_UNCLEAN) == 0)) 259 exit(7); /* Filesystem clean, report it now */ 260 exit(0); 261 } 262 if (ckclean && skipclean) { 263 /* 264 * If file system is gjournaled, check it here. 265 */ 266 if ((fsreadfd = open(filesys, O_RDONLY)) < 0 || readsb(0) == 0) 267 exit(3); /* Cannot read superblock */ 268 close(fsreadfd); 269 if ((sblock.fs_flags & FS_GJOURNAL) != 0) { 270 //printf("GJournaled file system detected on %s.\n", 271 // filesys); 272 if (sblock.fs_clean == 1) { 273 pwarn("FILE SYSTEM CLEAN; SKIPPING CHECKS\n"); 274 exit(0); 275 } 276 if ((sblock.fs_flags & (FS_UNCLEAN | FS_NEEDSFSCK)) == 0) { 277 gjournal_check(filesys); 278 if (chkdoreload(mntp) == 0) 279 exit(0); 280 exit(4); 281 } else { 282 pfatal("UNEXPECTED INCONSISTENCY, %s\n", 283 "CANNOT RUN FAST FSCK\n"); 284 } 285 } 286 } 287 /* 288 * If we are to do a background check: 289 * Get the mount point information of the file system 290 * create snapshot file 291 * return created snapshot file 292 * if not found, clear bkgrdflag and proceed with normal fsck 293 */ 294 if (bkgrdflag) { 295 if (mntp == NULL) { 296 bkgrdflag = 0; 297 pfatal("NOT MOUNTED, CANNOT RUN IN BACKGROUND\n"); 298 } else if ((mntp->f_flags & MNT_SOFTDEP) == 0) { 299 bkgrdflag = 0; 300 pfatal("NOT USING SOFT UPDATES, %s\n", 301 "CANNOT RUN IN BACKGROUND"); 302 } else if ((mntp->f_flags & MNT_RDONLY) != 0) { 303 bkgrdflag = 0; 304 pfatal("MOUNTED READ-ONLY, CANNOT RUN IN BACKGROUND\n"); 305 } else if ((fsreadfd = open(filesys, O_RDONLY)) >= 0) { 306 if (readsb(0) != 0) { 307 if (sblock.fs_flags & (FS_NEEDSFSCK | FS_SUJ)) { 308 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 pass1(); 430 431 /* 432 * 1b: locate first references to duplicates, if any 433 */ 434 if (duplist) { 435 if (preen || usedsoftdep) 436 pfatal("INTERNAL ERROR: dups with %s%s%s", 437 preen ? "-p" : "", 438 (preen && usedsoftdep) ? " and " : "", 439 usedsoftdep ? "softupdates" : ""); 440 printf("** Phase 1b - Rescan For More DUPS\n"); 441 pass1b(); 442 } 443 444 /* 445 * 2: traverse directories from root to mark all connected directories 446 */ 447 if (preen == 0) 448 printf("** Phase 2 - Check Pathnames\n"); 449 pass2(); 450 451 /* 452 * 3: scan inodes looking for disconnected directories 453 */ 454 if (preen == 0) 455 printf("** Phase 3 - Check Connectivity\n"); 456 pass3(); 457 458 /* 459 * 4: scan inodes looking for disconnected files; check reference counts 460 */ 461 if (preen == 0) 462 printf("** Phase 4 - Check Reference Counts\n"); 463 pass4(); 464 465 /* 466 * 5: check and repair resource counts in cylinder groups 467 */ 468 if (preen == 0) 469 printf("** Phase 5 - Check Cyl groups\n"); 470 pass5(); 471 472 /* 473 * print out summary statistics 474 */ 475 n_ffree = sblock.fs_cstotal.cs_nffree; 476 n_bfree = sblock.fs_cstotal.cs_nbfree; 477 files = maxino - ROOTINO - sblock.fs_cstotal.cs_nifree - n_files; 478 blks = n_blks + 479 sblock.fs_ncg * (cgdmin(&sblock, 0) - cgsblock(&sblock, 0)); 480 blks += cgsblock(&sblock, 0) - cgbase(&sblock, 0); 481 blks += howmany(sblock.fs_cssize, sblock.fs_fsize); 482 blks = maxfsblock - (n_ffree + sblock.fs_frag * n_bfree) - blks; 483 if (bkgrdflag && (files > 0 || blks > 0)) { 484 countdirs = sblock.fs_cstotal.cs_ndir - countdirs; 485 pwarn("Reclaimed: %ld directories, %ld files, %lld fragments\n", 486 countdirs, (long)files - countdirs, (long long)blks); 487 } 488 pwarn("%ld files, %jd used, %ju free ", 489 (long)n_files, (intmax_t)n_blks, 490 (uintmax_t)n_ffree + sblock.fs_frag * n_bfree); 491 printf("(%ju frags, %ju blocks, %.1f%% fragmentation)\n", 492 (uintmax_t)n_ffree, (uintmax_t)n_bfree, 493 n_ffree * 100.0 / sblock.fs_dsize); 494 if (debug) { 495 if (files < 0) 496 printf("%d inodes missing\n", -files); 497 if (blks < 0) 498 printf("%lld blocks missing\n", -(long long)blks); 499 if (duplist != NULL) { 500 printf("The following duplicate blocks remain:"); 501 for (dp = duplist; dp; dp = dp->next) 502 printf(" %lld,", (long long)dp->dup); 503 printf("\n"); 504 } 505 } 506 duplist = (struct dups *)0; 507 muldup = (struct dups *)0; 508 inocleanup(); 509 if (fsmodified) { 510 sblock.fs_time = time(NULL); 511 sbdirty(); 512 } 513 if (cvtlevel && sblk.b_dirty) { 514 /* 515 * Write out the duplicate super blocks 516 */ 517 for (cylno = 0; cylno < sblock.fs_ncg; cylno++) 518 blwrite(fswritefd, (char *)&sblock, 519 fsbtodb(&sblock, cgsblock(&sblock, cylno)), 520 SBLOCKSIZE); 521 } 522 if (rerun) 523 resolved = 0; 524 525 /* 526 * Check to see if the file system is mounted read-write. 527 */ 528 if (bkgrdflag == 0 && mntp != NULL && (mntp->f_flags & MNT_RDONLY) == 0) 529 resolved = 0; 530 ckfini(resolved); 531 532 for (cylno = 0; cylno < sblock.fs_ncg; cylno++) 533 if (inostathead[cylno].il_stat != NULL) 534 free((char *)inostathead[cylno].il_stat); 535 free((char *)inostathead); 536 inostathead = NULL; 537 if (fsmodified && !preen) 538 printf("\n***** FILE SYSTEM WAS MODIFIED *****\n"); 539 if (rerun) 540 printf("\n***** PLEASE RERUN FSCK *****\n"); 541 if (chkdoreload(mntp) != 0) { 542 if (!fsmodified) 543 return (0); 544 if (!preen) 545 printf("\n***** REBOOT NOW *****\n"); 546 sync(); 547 return (4); 548 } 549 return (0); 550 } 551 552 static int 553 chkdoreload(struct statfs *mntp) 554 { 555 struct iovec *iov; 556 int iovlen; 557 char errmsg[255]; 558 559 if (mntp == NULL) 560 return (0); 561 562 iov = NULL; 563 iovlen = 0; 564 errmsg[0] = '\0'; 565 /* 566 * We modified a mounted file system. Do a mount update on 567 * it unless it is read-write, so we can continue using it 568 * as safely as possible. 569 */ 570 if (mntp->f_flags & MNT_RDONLY) { 571 build_iovec(&iov, &iovlen, "fstype", "ffs", 4); 572 build_iovec(&iov, &iovlen, "from", mntp->f_mntfromname, 573 (size_t)-1); 574 build_iovec(&iov, &iovlen, "fspath", mntp->f_mntonname, 575 (size_t)-1); 576 build_iovec(&iov, &iovlen, "errmsg", errmsg, 577 sizeof(errmsg)); 578 build_iovec(&iov, &iovlen, "update", NULL, 0); 579 build_iovec(&iov, &iovlen, "reload", NULL, 0); 580 /* 581 * XX: We need the following line until we clean up 582 * nmount parsing of root mounts and NFS root mounts. 583 */ 584 build_iovec(&iov, &iovlen, "ro", NULL, 0); 585 if (nmount(iov, iovlen, mntp->f_flags) == 0) { 586 return (0); 587 } 588 pwarn("mount reload of '%s' failed: %s %s\n\n", 589 mntp->f_mntonname, strerror(errno), errmsg); 590 return (1); 591 } 592 return (0); 593 } 594 595 /* 596 * Get the mount point information for name. 597 */ 598 static struct statfs * 599 getmntpt(const char *name) 600 { 601 struct stat devstat, mntdevstat; 602 char device[sizeof(_PATH_DEV) - 1 + MNAMELEN]; 603 char *ddevname; 604 struct statfs *mntbuf, *statfsp; 605 int i, mntsize, isdev; 606 607 if (stat(name, &devstat) != 0) 608 return (NULL); 609 if (S_ISCHR(devstat.st_mode) || S_ISBLK(devstat.st_mode)) 610 isdev = 1; 611 else 612 isdev = 0; 613 mntsize = getmntinfo(&mntbuf, MNT_NOWAIT); 614 for (i = 0; i < mntsize; i++) { 615 statfsp = &mntbuf[i]; 616 ddevname = statfsp->f_mntfromname; 617 if (*ddevname != '/') { 618 strcpy(device, _PATH_DEV); 619 strcat(device, ddevname); 620 strcpy(statfsp->f_mntfromname, device); 621 } 622 if (isdev == 0) { 623 if (strcmp(name, statfsp->f_mntonname)) 624 continue; 625 return (statfsp); 626 } 627 if (stat(ddevname, &mntdevstat) == 0 && 628 mntdevstat.st_rdev == devstat.st_rdev) 629 return (statfsp); 630 } 631 statfsp = NULL; 632 return (statfsp); 633 } 634 635 static void 636 usage(void) 637 { 638 (void) fprintf(stderr, 639 "usage: %s [-BEFfnpry] [-b block] [-c level] [-m mode] " 640 "filesystem ...\n", 641 getprogname()); 642 exit(1); 643 } 644