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/stat.h> 46 #include <sys/file.h> 47 #include <sys/time.h> 48 #include <sys/mount.h> 49 #include <sys/resource.h> 50 #include <sys/sysctl.h> 51 #include <sys/uio.h> 52 #include <sys/disklabel.h> 53 54 #include <ufs/ufs/dinode.h> 55 #include <ufs/ffs/fs.h> 56 57 #include <err.h> 58 #include <errno.h> 59 #include <fstab.h> 60 #include <grp.h> 61 #include <mntopts.h> 62 #include <paths.h> 63 #include <stdint.h> 64 #include <string.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:CdfFm: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 'f': 110 skipclean = 0; 111 break; 112 113 case 'F': 114 bkgrdcheck = 1; 115 break; 116 117 case 'm': 118 lfmode = argtoi('m', "mode", optarg, 8); 119 if (lfmode &~ 07777) 120 errx(EEXIT, "bad mode to -m: %o", lfmode); 121 printf("** lost+found creation mode %o\n", lfmode); 122 break; 123 124 case 'n': 125 nflag++; 126 yflag = 0; 127 break; 128 129 case 'p': 130 preen++; 131 /*FALLTHROUGH*/ 132 133 case 'C': 134 ckclean++; 135 break; 136 137 case 'r': 138 inoopt++; 139 break; 140 141 case 'y': 142 yflag++; 143 nflag = 0; 144 break; 145 146 default: 147 usage(); 148 } 149 } 150 argc -= optind; 151 argv += optind; 152 153 if (!argc) 154 usage(); 155 156 if (signal(SIGINT, SIG_IGN) != SIG_IGN) 157 (void)signal(SIGINT, catch); 158 if (ckclean) 159 (void)signal(SIGQUIT, catchquit); 160 signal(SIGINFO, infohandler); 161 if (bkgrdflag) { 162 signal(SIGALRM, alarmhandler); 163 itimerval.it_interval.tv_sec = 5; 164 itimerval.it_interval.tv_usec = 0; 165 itimerval.it_value.tv_sec = 5; 166 itimerval.it_value.tv_usec = 0; 167 setitimer(ITIMER_REAL, &itimerval, NULL); 168 } 169 /* 170 * Push up our allowed memory limit so we can cope 171 * with huge file systems. 172 */ 173 if (getrlimit(RLIMIT_DATA, &rlimit) == 0) { 174 rlimit.rlim_cur = rlimit.rlim_max; 175 (void)setrlimit(RLIMIT_DATA, &rlimit); 176 } 177 while (argc-- > 0) 178 (void)checkfilesys(*argv++); 179 180 if (returntosingle) 181 ret = 2; 182 exit(ret); 183 } 184 185 static int 186 argtoi(int flag, const char *req, const char *str, int base) 187 { 188 char *cp; 189 int ret; 190 191 ret = (int)strtol(str, &cp, base); 192 if (cp == str || *cp) 193 errx(EEXIT, "-%c flag requires a %s", flag, req); 194 return (ret); 195 } 196 197 /* 198 * Check the specified file system. 199 */ 200 /* ARGSUSED */ 201 static int 202 checkfilesys(char *filesys) 203 { 204 ufs2_daddr_t n_ffree, n_bfree; 205 struct dups *dp; 206 struct statfs *mntp; 207 struct stat snapdir; 208 struct group *grp; 209 ufs2_daddr_t blks; 210 struct iovec *iov; 211 char errmsg[255]; 212 int iovlen; 213 int cylno; 214 ino_t files; 215 size_t size; 216 217 iov = NULL; 218 iovlen = 0; 219 errmsg[0] = '\0'; 220 221 cdevname = filesys; 222 if (debug && ckclean) 223 pwarn("starting\n"); 224 /* 225 * Make best effort to get the disk name. Check first to see 226 * if it is listed among the mounted file systems. Failing that 227 * check to see if it is listed in /etc/fstab. 228 */ 229 mntp = getmntpt(filesys); 230 if (mntp != NULL) 231 filesys = mntp->f_mntfromname; 232 else 233 filesys = blockcheck(filesys); 234 /* 235 * If -F flag specified, check to see whether a background check 236 * is possible and needed. If possible and needed, exit with 237 * status zero. Otherwise exit with status non-zero. A non-zero 238 * exit status will cause a foreground check to be run. 239 */ 240 sblock_init(); 241 if (bkgrdcheck) { 242 if ((fsreadfd = open(filesys, O_RDONLY)) < 0 || readsb(0) == 0) 243 exit(3); /* Cannot read superblock */ 244 close(fsreadfd); 245 /* Earlier background failed or journaled */ 246 if (sblock.fs_flags & (FS_NEEDSFSCK | FS_SUJ)) 247 exit(4); 248 if ((sblock.fs_flags & FS_DOSOFTDEP) == 0) 249 exit(5); /* Not running soft updates */ 250 size = MIBSIZE; 251 if (sysctlnametomib("vfs.ffs.adjrefcnt", adjrefcnt, &size) < 0) 252 exit(6); /* Lacks kernel support */ 253 if ((mntp == NULL && sblock.fs_clean == 1) || 254 (mntp != NULL && (sblock.fs_flags & FS_UNCLEAN) == 0)) 255 exit(7); /* Filesystem clean, report it now */ 256 exit(0); 257 } 258 if (ckclean && skipclean) { 259 /* 260 * If file system is gjournaled, check it here. 261 */ 262 if ((fsreadfd = open(filesys, O_RDONLY)) < 0 || readsb(0) == 0) 263 exit(3); /* Cannot read superblock */ 264 close(fsreadfd); 265 if ((sblock.fs_flags & FS_GJOURNAL) != 0) { 266 //printf("GJournaled file system detected on %s.\n", 267 // filesys); 268 if (sblock.fs_clean == 1) { 269 pwarn("FILE SYSTEM CLEAN; SKIPPING CHECKS\n"); 270 exit(0); 271 } 272 if ((sblock.fs_flags & (FS_UNCLEAN | FS_NEEDSFSCK)) == 0) { 273 gjournal_check(filesys); 274 if (chkdoreload(mntp) == 0) 275 exit(0); 276 exit(4); 277 } else { 278 pfatal("UNEXPECTED INCONSISTENCY, %s\n", 279 "CANNOT RUN FAST FSCK\n"); 280 } 281 } 282 } 283 /* 284 * If we are to do a background check: 285 * Get the mount point information of the file system 286 * create snapshot file 287 * return created snapshot file 288 * if not found, clear bkgrdflag and proceed with normal fsck 289 */ 290 if (bkgrdflag) { 291 if (mntp == NULL) { 292 bkgrdflag = 0; 293 pfatal("NOT MOUNTED, CANNOT RUN IN BACKGROUND\n"); 294 } else if ((mntp->f_flags & MNT_SOFTDEP) == 0) { 295 bkgrdflag = 0; 296 pfatal("NOT USING SOFT UPDATES, %s\n", 297 "CANNOT RUN IN BACKGROUND"); 298 } else if ((mntp->f_flags & MNT_RDONLY) != 0) { 299 bkgrdflag = 0; 300 pfatal("MOUNTED READ-ONLY, CANNOT RUN IN BACKGROUND\n"); 301 } else if ((fsreadfd = open(filesys, O_RDONLY)) >= 0) { 302 if (readsb(0) != 0) { 303 if (sblock.fs_flags & (FS_NEEDSFSCK | FS_SUJ)) { 304 bkgrdflag = 0; 305 pfatal("UNEXPECTED INCONSISTENCY, %s\n", 306 "CANNOT RUN IN BACKGROUND\n"); 307 } 308 if ((sblock.fs_flags & FS_UNCLEAN) == 0 && 309 skipclean && ckclean) { 310 /* 311 * file system is clean; 312 * skip snapshot and report it clean 313 */ 314 pwarn("FILE SYSTEM CLEAN; %s\n", 315 "SKIPPING CHECKS"); 316 goto clean; 317 } 318 } 319 close(fsreadfd); 320 } 321 if (bkgrdflag) { 322 snprintf(snapname, sizeof snapname, "%s/.snap", 323 mntp->f_mntonname); 324 if (stat(snapname, &snapdir) < 0) { 325 if (errno != ENOENT) { 326 bkgrdflag = 0; 327 pfatal("CANNOT FIND %s %s: %s, %s\n", 328 "SNAPSHOT DIRECTORY", 329 snapname, strerror(errno), 330 "CANNOT RUN IN BACKGROUND"); 331 } else if ((grp = getgrnam("operator")) == 0 || 332 mkdir(snapname, 0770) < 0 || 333 chown(snapname, -1, grp->gr_gid) < 0 || 334 chmod(snapname, 0770) < 0) { 335 bkgrdflag = 0; 336 pfatal("CANNOT CREATE %s %s: %s, %s\n", 337 "SNAPSHOT DIRECTORY", 338 snapname, strerror(errno), 339 "CANNOT RUN IN BACKGROUND"); 340 } 341 } else if (!S_ISDIR(snapdir.st_mode)) { 342 bkgrdflag = 0; 343 pfatal("%s IS NOT A DIRECTORY, %s\n", snapname, 344 "CANNOT RUN IN BACKGROUND"); 345 } 346 } 347 if (bkgrdflag) { 348 snprintf(snapname, sizeof snapname, 349 "%s/.snap/fsck_snapshot", mntp->f_mntonname); 350 build_iovec(&iov, &iovlen, "fstype", "ffs", 4); 351 build_iovec(&iov, &iovlen, "from", snapname, 352 (size_t)-1); 353 build_iovec(&iov, &iovlen, "fspath", mntp->f_mntonname, 354 (size_t)-1); 355 build_iovec(&iov, &iovlen, "errmsg", errmsg, 356 sizeof(errmsg)); 357 build_iovec(&iov, &iovlen, "update", NULL, 0); 358 build_iovec(&iov, &iovlen, "snapshot", NULL, 0); 359 360 while (nmount(iov, iovlen, mntp->f_flags) < 0) { 361 if (errno == EEXIST && unlink(snapname) == 0) 362 continue; 363 bkgrdflag = 0; 364 pfatal("CANNOT CREATE SNAPSHOT %s: %s %s\n", 365 snapname, strerror(errno), errmsg); 366 break; 367 } 368 if (bkgrdflag != 0) 369 filesys = snapname; 370 } 371 } 372 373 switch (setup(filesys)) { 374 case 0: 375 if (preen) 376 pfatal("CAN'T CHECK FILE SYSTEM."); 377 return (0); 378 case -1: 379 clean: 380 pwarn("clean, %ld free ", (long)(sblock.fs_cstotal.cs_nffree + 381 sblock.fs_frag * sblock.fs_cstotal.cs_nbfree)); 382 printf("(%lld frags, %lld blocks, %.1f%% fragmentation)\n", 383 (long long)sblock.fs_cstotal.cs_nffree, 384 (long long)sblock.fs_cstotal.cs_nbfree, 385 sblock.fs_cstotal.cs_nffree * 100.0 / sblock.fs_dsize); 386 return (0); 387 } 388 /* 389 * Determine if we can and should do journal recovery. 390 */ 391 if ((sblock.fs_flags & (FS_SUJ | FS_NEEDSFSCK)) == FS_SUJ) { 392 if (preen || reply("USE JOURNAL?")) { 393 if (suj_check(filesys) == 0) { 394 if (chkdoreload(mntp) == 0) 395 exit(0); 396 exit(4); 397 } 398 /* suj_check failed, fall through. */ 399 } 400 printf("** Skipping journal, falling through to full fsck\n"); 401 /* 402 * Write the superblock so we don't try to recover the 403 * journal on another pass. 404 */ 405 sblock.fs_mtime = time(NULL); 406 sbdirty(); 407 } 408 409 /* 410 * Cleared if any questions answered no. Used to decide if 411 * the superblock should be marked clean. 412 */ 413 resolved = 1; 414 /* 415 * 1: scan inodes tallying blocks used 416 */ 417 if (preen == 0) { 418 printf("** Last Mounted on %s\n", sblock.fs_fsmnt); 419 if (mntp != NULL && mntp->f_flags & MNT_ROOTFS) 420 printf("** Root file system\n"); 421 printf("** Phase 1 - Check Blocks and Sizes\n"); 422 } 423 pass1(); 424 425 /* 426 * 1b: locate first references to duplicates, if any 427 */ 428 if (duplist) { 429 if (preen || usedsoftdep) 430 pfatal("INTERNAL ERROR: dups with %s%s%s", 431 preen ? "-p" : "", 432 (preen && usedsoftdep) ? " and " : "", 433 usedsoftdep ? "softupdates" : ""); 434 printf("** Phase 1b - Rescan For More DUPS\n"); 435 pass1b(); 436 } 437 438 /* 439 * 2: traverse directories from root to mark all connected directories 440 */ 441 if (preen == 0) 442 printf("** Phase 2 - Check Pathnames\n"); 443 pass2(); 444 445 /* 446 * 3: scan inodes looking for disconnected directories 447 */ 448 if (preen == 0) 449 printf("** Phase 3 - Check Connectivity\n"); 450 pass3(); 451 452 /* 453 * 4: scan inodes looking for disconnected files; check reference counts 454 */ 455 if (preen == 0) 456 printf("** Phase 4 - Check Reference Counts\n"); 457 pass4(); 458 459 /* 460 * 5: check and repair resource counts in cylinder groups 461 */ 462 if (preen == 0) 463 printf("** Phase 5 - Check Cyl groups\n"); 464 pass5(); 465 466 /* 467 * print out summary statistics 468 */ 469 n_ffree = sblock.fs_cstotal.cs_nffree; 470 n_bfree = sblock.fs_cstotal.cs_nbfree; 471 files = maxino - ROOTINO - sblock.fs_cstotal.cs_nifree - n_files; 472 blks = n_blks + 473 sblock.fs_ncg * (cgdmin(&sblock, 0) - cgsblock(&sblock, 0)); 474 blks += cgsblock(&sblock, 0) - cgbase(&sblock, 0); 475 blks += howmany(sblock.fs_cssize, sblock.fs_fsize); 476 blks = maxfsblock - (n_ffree + sblock.fs_frag * n_bfree) - blks; 477 if (bkgrdflag && (files > 0 || blks > 0)) { 478 countdirs = sblock.fs_cstotal.cs_ndir - countdirs; 479 pwarn("Reclaimed: %ld directories, %ld files, %lld fragments\n", 480 countdirs, (long)files - countdirs, (long long)blks); 481 } 482 pwarn("%ld files, %jd used, %ju free ", 483 (long)n_files, (intmax_t)n_blks, 484 (uintmax_t)n_ffree + sblock.fs_frag * n_bfree); 485 printf("(%ju frags, %ju blocks, %.1f%% fragmentation)\n", 486 (uintmax_t)n_ffree, (uintmax_t)n_bfree, 487 n_ffree * 100.0 / sblock.fs_dsize); 488 if (debug) { 489 if (files < 0) 490 printf("%d inodes missing\n", -files); 491 if (blks < 0) 492 printf("%lld blocks missing\n", -(long long)blks); 493 if (duplist != NULL) { 494 printf("The following duplicate blocks remain:"); 495 for (dp = duplist; dp; dp = dp->next) 496 printf(" %lld,", (long long)dp->dup); 497 printf("\n"); 498 } 499 } 500 duplist = (struct dups *)0; 501 muldup = (struct dups *)0; 502 inocleanup(); 503 if (fsmodified) { 504 sblock.fs_time = time(NULL); 505 sbdirty(); 506 } 507 if (cvtlevel && sblk.b_dirty) { 508 /* 509 * Write out the duplicate super blocks 510 */ 511 for (cylno = 0; cylno < sblock.fs_ncg; cylno++) 512 blwrite(fswritefd, (char *)&sblock, 513 fsbtodb(&sblock, cgsblock(&sblock, cylno)), 514 SBLOCKSIZE); 515 } 516 if (rerun) 517 resolved = 0; 518 519 /* 520 * Check to see if the file system is mounted read-write. 521 */ 522 if (bkgrdflag == 0 && mntp != NULL && (mntp->f_flags & MNT_RDONLY) == 0) 523 resolved = 0; 524 ckfini(resolved); 525 526 for (cylno = 0; cylno < sblock.fs_ncg; cylno++) 527 if (inostathead[cylno].il_stat != NULL) 528 free((char *)inostathead[cylno].il_stat); 529 free((char *)inostathead); 530 inostathead = NULL; 531 if (fsmodified && !preen) 532 printf("\n***** FILE SYSTEM WAS MODIFIED *****\n"); 533 if (rerun) 534 printf("\n***** PLEASE RERUN FSCK *****\n"); 535 if (chkdoreload(mntp) != 0) { 536 if (!fsmodified) 537 return (0); 538 if (!preen) 539 printf("\n***** REBOOT NOW *****\n"); 540 sync(); 541 return (4); 542 } 543 return (0); 544 } 545 546 static int 547 chkdoreload(struct statfs *mntp) 548 { 549 struct iovec *iov; 550 int iovlen; 551 char errmsg[255]; 552 553 if (mntp == NULL) 554 return (0); 555 556 iov = NULL; 557 iovlen = 0; 558 errmsg[0] = '\0'; 559 /* 560 * We modified a mounted file system. Do a mount update on 561 * it unless it is read-write, so we can continue using it 562 * as safely as possible. 563 */ 564 if (mntp->f_flags & MNT_RDONLY) { 565 build_iovec(&iov, &iovlen, "fstype", "ffs", 4); 566 build_iovec(&iov, &iovlen, "from", mntp->f_mntfromname, 567 (size_t)-1); 568 build_iovec(&iov, &iovlen, "fspath", mntp->f_mntonname, 569 (size_t)-1); 570 build_iovec(&iov, &iovlen, "errmsg", errmsg, 571 sizeof(errmsg)); 572 build_iovec(&iov, &iovlen, "update", NULL, 0); 573 build_iovec(&iov, &iovlen, "reload", NULL, 0); 574 /* 575 * XX: We need the following line until we clean up 576 * nmount parsing of root mounts and NFS root mounts. 577 */ 578 build_iovec(&iov, &iovlen, "ro", NULL, 0); 579 if (nmount(iov, iovlen, mntp->f_flags) == 0) { 580 return (0); 581 } 582 pwarn("mount reload of '%s' failed: %s %s\n\n", 583 mntp->f_mntonname, strerror(errno), errmsg); 584 return (1); 585 } 586 return (0); 587 } 588 589 /* 590 * Get the mount point information for name. 591 */ 592 static struct statfs * 593 getmntpt(const char *name) 594 { 595 struct stat devstat, mntdevstat; 596 char device[sizeof(_PATH_DEV) - 1 + MNAMELEN]; 597 char *ddevname; 598 struct statfs *mntbuf, *statfsp; 599 int i, mntsize, isdev; 600 601 if (stat(name, &devstat) != 0) 602 return (NULL); 603 if (S_ISCHR(devstat.st_mode) || S_ISBLK(devstat.st_mode)) 604 isdev = 1; 605 else 606 isdev = 0; 607 mntsize = getmntinfo(&mntbuf, MNT_NOWAIT); 608 for (i = 0; i < mntsize; i++) { 609 statfsp = &mntbuf[i]; 610 ddevname = statfsp->f_mntfromname; 611 if (*ddevname != '/') { 612 strcpy(device, _PATH_DEV); 613 strcat(device, ddevname); 614 strcpy(statfsp->f_mntfromname, device); 615 } 616 if (isdev == 0) { 617 if (strcmp(name, statfsp->f_mntonname)) 618 continue; 619 return (statfsp); 620 } 621 if (stat(ddevname, &mntdevstat) == 0 && 622 mntdevstat.st_rdev == devstat.st_rdev) 623 return (statfsp); 624 } 625 statfsp = NULL; 626 return (statfsp); 627 } 628 629 static void 630 usage(void) 631 { 632 (void) fprintf(stderr, 633 "usage: %s [-BFprfny] [-b block] [-c level] [-m mode] " 634 "filesystem ...\n", 635 getprogname()); 636 exit(1); 637 } 638