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 struct iovec *iov; 214 char errmsg[255]; 215 int iovlen; 216 int cylno; 217 intmax_t blks, files; 218 size_t size; 219 220 iov = NULL; 221 iovlen = 0; 222 errmsg[0] = '\0'; 223 224 cdevname = filesys; 225 if (debug && ckclean) 226 pwarn("starting\n"); 227 /* 228 * Make best effort to get the disk name. Check first to see 229 * if it is listed among the mounted file systems. Failing that 230 * check to see if it is listed in /etc/fstab. 231 */ 232 mntp = getmntpt(filesys); 233 if (mntp != NULL) 234 filesys = mntp->f_mntfromname; 235 else 236 filesys = blockcheck(filesys); 237 /* 238 * If -F flag specified, check to see whether a background check 239 * is possible and needed. If possible and needed, exit with 240 * status zero. Otherwise exit with status non-zero. A non-zero 241 * exit status will cause a foreground check to be run. 242 */ 243 sblock_init(); 244 if (bkgrdcheck) { 245 if ((fsreadfd = open(filesys, O_RDONLY)) < 0 || readsb(0) == 0) 246 exit(3); /* Cannot read superblock */ 247 close(fsreadfd); 248 /* Earlier background failed or journaled */ 249 if (sblock.fs_flags & (FS_NEEDSFSCK | FS_SUJ)) 250 exit(4); 251 if ((sblock.fs_flags & FS_DOSOFTDEP) == 0) 252 exit(5); /* Not running soft updates */ 253 size = MIBSIZE; 254 if (sysctlnametomib("vfs.ffs.adjrefcnt", adjrefcnt, &size) < 0) 255 exit(6); /* Lacks kernel support */ 256 if ((mntp == NULL && sblock.fs_clean == 1) || 257 (mntp != NULL && (sblock.fs_flags & FS_UNCLEAN) == 0)) 258 exit(7); /* Filesystem clean, report it now */ 259 exit(0); 260 } 261 if (ckclean && skipclean) { 262 /* 263 * If file system is gjournaled, check it here. 264 */ 265 if ((fsreadfd = open(filesys, O_RDONLY)) < 0 || readsb(0) == 0) 266 exit(3); /* Cannot read superblock */ 267 close(fsreadfd); 268 if ((sblock.fs_flags & FS_GJOURNAL) != 0) { 269 //printf("GJournaled file system detected on %s.\n", 270 // filesys); 271 if (sblock.fs_clean == 1) { 272 pwarn("FILE SYSTEM CLEAN; SKIPPING CHECKS\n"); 273 exit(0); 274 } 275 if ((sblock.fs_flags & (FS_UNCLEAN | FS_NEEDSFSCK)) == 0) { 276 gjournal_check(filesys); 277 if (chkdoreload(mntp) == 0) 278 exit(0); 279 exit(4); 280 } else { 281 pfatal( 282 "UNEXPECTED INCONSISTENCY, CANNOT RUN FAST FSCK\n"); 283 } 284 } 285 } 286 /* 287 * If we are to do a background check: 288 * Get the mount point information of the file system 289 * create snapshot file 290 * return created snapshot file 291 * if not found, clear bkgrdflag and proceed with normal fsck 292 */ 293 if (bkgrdflag) { 294 if (mntp == NULL) { 295 bkgrdflag = 0; 296 pfatal("NOT MOUNTED, CANNOT RUN IN BACKGROUND\n"); 297 } else if ((mntp->f_flags & MNT_SOFTDEP) == 0) { 298 bkgrdflag = 0; 299 pfatal( 300 "NOT USING SOFT UPDATES, CANNOT RUN IN BACKGROUND\n"); 301 } else if ((mntp->f_flags & MNT_RDONLY) != 0) { 302 bkgrdflag = 0; 303 pfatal("MOUNTED READ-ONLY, CANNOT RUN IN BACKGROUND\n"); 304 } else if ((fsreadfd = open(filesys, O_RDONLY)) >= 0) { 305 if (readsb(0) != 0) { 306 if (sblock.fs_flags & (FS_NEEDSFSCK | FS_SUJ)) { 307 bkgrdflag = 0; 308 pfatal( 309 "UNEXPECTED INCONSISTENCY, CANNOT RUN IN BACKGROUND\n"); 310 } 311 if ((sblock.fs_flags & FS_UNCLEAN) == 0 && 312 skipclean && ckclean) { 313 /* 314 * file system is clean; 315 * skip snapshot and report it clean 316 */ 317 pwarn( 318 "FILE SYSTEM CLEAN; SKIPPING CHECKS\n"); 319 goto clean; 320 } 321 } 322 close(fsreadfd); 323 } 324 if (bkgrdflag) { 325 snprintf(snapname, sizeof snapname, "%s/.snap", 326 mntp->f_mntonname); 327 if (stat(snapname, &snapdir) < 0) { 328 if (errno != ENOENT) { 329 bkgrdflag = 0; 330 pfatal( 331 "CANNOT FIND SNAPSHOT DIRECTORY %s: %s, CANNOT RUN IN BACKGROUND\n", 332 snapname, strerror(errno)); 333 } else if ((grp = getgrnam("operator")) == 0 || 334 mkdir(snapname, 0770) < 0 || 335 chown(snapname, -1, grp->gr_gid) < 0 || 336 chmod(snapname, 0770) < 0) { 337 bkgrdflag = 0; 338 pfatal( 339 "CANNOT CREATE SNAPSHOT DIRECTORY %s: %s, CANNOT RUN IN BACKGROUND\n", 340 snapname, strerror(errno)); 341 } 342 } else if (!S_ISDIR(snapdir.st_mode)) { 343 bkgrdflag = 0; 344 pfatal( 345 "%s IS NOT A DIRECTORY, CANNOT RUN IN BACKGROUND\n", 346 snapname); 347 } 348 } 349 if (bkgrdflag) { 350 snprintf(snapname, sizeof snapname, 351 "%s/.snap/fsck_snapshot", mntp->f_mntonname); 352 build_iovec(&iov, &iovlen, "fstype", "ffs", 4); 353 build_iovec(&iov, &iovlen, "from", snapname, 354 (size_t)-1); 355 build_iovec(&iov, &iovlen, "fspath", mntp->f_mntonname, 356 (size_t)-1); 357 build_iovec(&iov, &iovlen, "errmsg", errmsg, 358 sizeof(errmsg)); 359 build_iovec(&iov, &iovlen, "update", NULL, 0); 360 build_iovec(&iov, &iovlen, "snapshot", NULL, 0); 361 362 while (nmount(iov, iovlen, mntp->f_flags) < 0) { 363 if (errno == EEXIST && unlink(snapname) == 0) 364 continue; 365 bkgrdflag = 0; 366 pfatal("CANNOT CREATE SNAPSHOT %s: %s %s\n", 367 snapname, strerror(errno), errmsg); 368 break; 369 } 370 if (bkgrdflag != 0) 371 filesys = snapname; 372 } 373 } 374 375 switch (setup(filesys)) { 376 case 0: 377 if (preen) 378 pfatal("CAN'T CHECK FILE SYSTEM."); 379 return (0); 380 case -1: 381 clean: 382 pwarn("clean, %ld free ", (long)(sblock.fs_cstotal.cs_nffree + 383 sblock.fs_frag * sblock.fs_cstotal.cs_nbfree)); 384 printf("(%jd frags, %jd blocks, %.1f%% fragmentation)\n", 385 (intmax_t)sblock.fs_cstotal.cs_nffree, 386 (intmax_t)sblock.fs_cstotal.cs_nbfree, 387 sblock.fs_cstotal.cs_nffree * 100.0 / sblock.fs_dsize); 388 return (0); 389 } 390 /* 391 * Determine if we can and should do journal recovery. 392 */ 393 if ((sblock.fs_flags & FS_SUJ) == FS_SUJ) { 394 if ((sblock.fs_flags & FS_NEEDSFSCK) != FS_NEEDSFSCK && skipclean) { 395 if (preen || reply("USE JOURNAL")) { 396 if (suj_check(filesys) == 0) { 397 printf("\n***** FILE SYSTEM MARKED CLEAN *****\n"); 398 if (chkdoreload(mntp) == 0) 399 exit(0); 400 exit(4); 401 } 402 } 403 printf("** Skipping journal, falling through to full fsck\n\n"); 404 } 405 /* 406 * Write the superblock so we don't try to recover the 407 * journal on another pass. 408 */ 409 sblock.fs_mtime = time(NULL); 410 sbdirty(); 411 } 412 413 /* 414 * Cleared if any questions answered no. Used to decide if 415 * the superblock should be marked clean. 416 */ 417 resolved = 1; 418 /* 419 * 1: scan inodes tallying blocks used 420 */ 421 if (preen == 0) { 422 printf("** Last Mounted on %s\n", sblock.fs_fsmnt); 423 if (mntp != NULL && mntp->f_flags & MNT_ROOTFS) 424 printf("** Root file system\n"); 425 printf("** Phase 1 - Check Blocks and Sizes\n"); 426 } 427 pass1(); 428 429 /* 430 * 1b: locate first references to duplicates, if any 431 */ 432 if (duplist) { 433 if (preen || usedsoftdep) 434 pfatal("INTERNAL ERROR: dups with %s%s%s", 435 preen ? "-p" : "", 436 (preen && usedsoftdep) ? " and " : "", 437 usedsoftdep ? "softupdates" : ""); 438 printf("** Phase 1b - Rescan For More DUPS\n"); 439 pass1b(); 440 } 441 442 /* 443 * 2: traverse directories from root to mark all connected directories 444 */ 445 if (preen == 0) 446 printf("** Phase 2 - Check Pathnames\n"); 447 pass2(); 448 449 /* 450 * 3: scan inodes looking for disconnected directories 451 */ 452 if (preen == 0) 453 printf("** Phase 3 - Check Connectivity\n"); 454 pass3(); 455 456 /* 457 * 4: scan inodes looking for disconnected files; check reference counts 458 */ 459 if (preen == 0) 460 printf("** Phase 4 - Check Reference Counts\n"); 461 pass4(); 462 463 /* 464 * 5: check and repair resource counts in cylinder groups 465 */ 466 if (preen == 0) 467 printf("** Phase 5 - Check Cyl groups\n"); 468 pass5(); 469 470 /* 471 * print out summary statistics 472 */ 473 n_ffree = sblock.fs_cstotal.cs_nffree; 474 n_bfree = sblock.fs_cstotal.cs_nbfree; 475 files = maxino - ROOTINO - sblock.fs_cstotal.cs_nifree - n_files; 476 blks = n_blks + 477 sblock.fs_ncg * (cgdmin(&sblock, 0) - cgsblock(&sblock, 0)); 478 blks += cgsblock(&sblock, 0) - cgbase(&sblock, 0); 479 blks += howmany(sblock.fs_cssize, sblock.fs_fsize); 480 blks = maxfsblock - (n_ffree + sblock.fs_frag * n_bfree) - blks; 481 if (bkgrdflag && (files > 0 || blks > 0)) { 482 countdirs = sblock.fs_cstotal.cs_ndir - countdirs; 483 pwarn("Reclaimed: %ld directories, %jd files, %jd fragments\n", 484 countdirs, files - countdirs, blks); 485 } 486 pwarn("%ld files, %jd used, %ju free ", 487 (long)n_files, (intmax_t)n_blks, 488 (uintmax_t)n_ffree + sblock.fs_frag * n_bfree); 489 printf("(%ju frags, %ju blocks, %.1f%% fragmentation)\n", 490 (uintmax_t)n_ffree, (uintmax_t)n_bfree, 491 n_ffree * 100.0 / sblock.fs_dsize); 492 if (debug) { 493 if (files < 0) 494 printf("%jd inodes missing\n", -files); 495 if (blks < 0) 496 printf("%jd blocks missing\n", -blks); 497 if (duplist != NULL) { 498 printf("The following duplicate blocks remain:"); 499 for (dp = duplist; dp; dp = dp->next) 500 printf(" %jd,", (intmax_t)dp->dup); 501 printf("\n"); 502 } 503 } 504 duplist = (struct dups *)0; 505 muldup = (struct dups *)0; 506 inocleanup(); 507 if (fsmodified) { 508 sblock.fs_time = time(NULL); 509 sbdirty(); 510 } 511 if (cvtlevel && sblk.b_dirty) { 512 /* 513 * Write out the duplicate super blocks 514 */ 515 for (cylno = 0; cylno < sblock.fs_ncg; cylno++) 516 blwrite(fswritefd, (char *)&sblock, 517 fsbtodb(&sblock, cgsblock(&sblock, cylno)), 518 SBLOCKSIZE); 519 } 520 if (rerun) 521 resolved = 0; 522 523 /* 524 * Check to see if the file system is mounted read-write. 525 */ 526 if (bkgrdflag == 0 && mntp != NULL && (mntp->f_flags & MNT_RDONLY) == 0) 527 resolved = 0; 528 ckfini(resolved); 529 530 for (cylno = 0; cylno < sblock.fs_ncg; cylno++) 531 if (inostathead[cylno].il_stat != NULL) 532 free((char *)inostathead[cylno].il_stat); 533 free((char *)inostathead); 534 inostathead = NULL; 535 if (fsmodified && !preen) 536 printf("\n***** FILE SYSTEM WAS MODIFIED *****\n"); 537 if (rerun) 538 printf("\n***** PLEASE RERUN FSCK *****\n"); 539 if (chkdoreload(mntp) != 0) { 540 if (!fsmodified) 541 return (0); 542 if (!preen) 543 printf("\n***** REBOOT NOW *****\n"); 544 sync(); 545 return (4); 546 } 547 return (0); 548 } 549 550 static int 551 chkdoreload(struct statfs *mntp) 552 { 553 struct iovec *iov; 554 int iovlen; 555 char errmsg[255]; 556 557 if (mntp == NULL) 558 return (0); 559 560 iov = NULL; 561 iovlen = 0; 562 errmsg[0] = '\0'; 563 /* 564 * We modified a mounted file system. Do a mount update on 565 * it unless it is read-write, so we can continue using it 566 * as safely as possible. 567 */ 568 if (mntp->f_flags & MNT_RDONLY) { 569 build_iovec(&iov, &iovlen, "fstype", "ffs", 4); 570 build_iovec(&iov, &iovlen, "from", mntp->f_mntfromname, 571 (size_t)-1); 572 build_iovec(&iov, &iovlen, "fspath", mntp->f_mntonname, 573 (size_t)-1); 574 build_iovec(&iov, &iovlen, "errmsg", errmsg, 575 sizeof(errmsg)); 576 build_iovec(&iov, &iovlen, "update", NULL, 0); 577 build_iovec(&iov, &iovlen, "reload", NULL, 0); 578 /* 579 * XX: We need the following line until we clean up 580 * nmount parsing of root mounts and NFS root mounts. 581 */ 582 build_iovec(&iov, &iovlen, "ro", NULL, 0); 583 if (nmount(iov, iovlen, mntp->f_flags) == 0) { 584 return (0); 585 } 586 pwarn("mount reload of '%s' failed: %s %s\n\n", 587 mntp->f_mntonname, strerror(errno), errmsg); 588 return (1); 589 } 590 return (0); 591 } 592 593 /* 594 * Get the mount point information for name. 595 */ 596 static struct statfs * 597 getmntpt(const char *name) 598 { 599 struct stat devstat, mntdevstat; 600 char device[sizeof(_PATH_DEV) - 1 + MNAMELEN]; 601 char *ddevname; 602 struct statfs *mntbuf, *statfsp; 603 int i, mntsize, isdev; 604 605 if (stat(name, &devstat) != 0) 606 return (NULL); 607 if (S_ISCHR(devstat.st_mode) || S_ISBLK(devstat.st_mode)) 608 isdev = 1; 609 else 610 isdev = 0; 611 mntsize = getmntinfo(&mntbuf, MNT_NOWAIT); 612 for (i = 0; i < mntsize; i++) { 613 statfsp = &mntbuf[i]; 614 ddevname = statfsp->f_mntfromname; 615 if (*ddevname != '/') { 616 strcpy(device, _PATH_DEV); 617 strcat(device, ddevname); 618 strcpy(statfsp->f_mntfromname, device); 619 } 620 if (isdev == 0) { 621 if (strcmp(name, statfsp->f_mntonname)) 622 continue; 623 return (statfsp); 624 } 625 if (stat(ddevname, &mntdevstat) == 0 && 626 mntdevstat.st_rdev == devstat.st_rdev) 627 return (statfsp); 628 } 629 statfsp = NULL; 630 return (statfsp); 631 } 632 633 static void 634 usage(void) 635 { 636 (void) fprintf(stderr, 637 "usage: %s [-BEFfnpry] [-b block] [-c level] [-m mode] filesystem ...\n", 638 getprogname()); 639 exit(1); 640 } 641