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