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/disklabel.h> 52 53 #include <ufs/ufs/dinode.h> 54 #include <ufs/ufs/ufsmount.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 <paths.h> 62 #include <stdint.h> 63 #include <string.h> 64 65 #include "fsck.h" 66 67 static void usage(void) __dead2; 68 static int argtoi(int flag, const char *req, const char *str, int base); 69 static int checkfilesys(char *filesys); 70 static struct statfs *getmntpt(const char *); 71 72 int 73 main(int argc, char *argv[]) 74 { 75 int ch; 76 struct rlimit rlimit; 77 struct itimerval itimerval; 78 int ret = 0; 79 80 sync(); 81 skipclean = 1; 82 while ((ch = getopt(argc, argv, "b:Bc:dfFm:npy")) != -1) { 83 switch (ch) { 84 case 'b': 85 skipclean = 0; 86 bflag = argtoi('b', "number", optarg, 10); 87 printf("Alternate super block location: %d\n", bflag); 88 break; 89 90 case 'B': 91 bkgrdflag = 1; 92 break; 93 94 case 'c': 95 skipclean = 0; 96 cvtlevel = argtoi('c', "conversion level", optarg, 10); 97 if (cvtlevel < 3) 98 errx(EEXIT, "cannot do level %d conversion", 99 cvtlevel); 100 break; 101 102 case 'd': 103 debug++; 104 break; 105 106 case 'f': 107 skipclean = 0; 108 break; 109 110 case 'F': 111 bkgrdcheck = 1; 112 break; 113 114 case 'm': 115 lfmode = argtoi('m', "mode", optarg, 8); 116 if (lfmode &~ 07777) 117 errx(EEXIT, "bad mode to -m: %o", lfmode); 118 printf("** lost+found creation mode %o\n", lfmode); 119 break; 120 121 case 'n': 122 nflag++; 123 yflag = 0; 124 break; 125 126 case 'p': 127 preen++; 128 break; 129 130 case 'y': 131 yflag++; 132 nflag = 0; 133 break; 134 135 default: 136 usage(); 137 } 138 } 139 argc -= optind; 140 argv += optind; 141 142 if (!argc) 143 usage(); 144 145 if (signal(SIGINT, SIG_IGN) != SIG_IGN) 146 (void)signal(SIGINT, catch); 147 if (preen) 148 (void)signal(SIGQUIT, catchquit); 149 signal(SIGINFO, infohandler); 150 if (bkgrdflag) { 151 signal(SIGALRM, alarmhandler); 152 itimerval.it_interval.tv_sec = 5; 153 itimerval.it_interval.tv_usec = 0; 154 itimerval.it_value.tv_sec = 5; 155 itimerval.it_value.tv_usec = 0; 156 setitimer(ITIMER_REAL, &itimerval, NULL); 157 } 158 /* 159 * Push up our allowed memory limit so we can cope 160 * with huge file systems. 161 */ 162 if (getrlimit(RLIMIT_DATA, &rlimit) == 0) { 163 rlimit.rlim_cur = rlimit.rlim_max; 164 (void)setrlimit(RLIMIT_DATA, &rlimit); 165 } 166 while (argc-- > 0) 167 (void)checkfilesys(*argv++); 168 169 if (returntosingle) 170 ret = 2; 171 exit(ret); 172 } 173 174 static int 175 argtoi(int flag, const char *req, const char *str, int base) 176 { 177 char *cp; 178 int ret; 179 180 ret = (int)strtol(str, &cp, base); 181 if (cp == str || *cp) 182 errx(EEXIT, "-%c flag requires a %s", flag, req); 183 return (ret); 184 } 185 186 /* 187 * Check the specified file system. 188 */ 189 /* ARGSUSED */ 190 static int 191 checkfilesys(char *filesys) 192 { 193 ufs2_daddr_t n_ffree, n_bfree; 194 struct ufs_args args; 195 struct dups *dp; 196 struct statfs *mntp; 197 struct stat snapdir; 198 struct group *grp; 199 ufs2_daddr_t blks; 200 int cylno, ret; 201 ino_t files; 202 size_t size; 203 204 cdevname = filesys; 205 if (debug && preen) 206 pwarn("starting\n"); 207 /* 208 * Make best effort to get the disk name. Check first to see 209 * if it is listed among the mounted file systems. Failing that 210 * check to see if it is listed in /etc/fstab. 211 */ 212 mntp = getmntpt(filesys); 213 if (mntp != NULL) 214 filesys = mntp->f_mntfromname; 215 else 216 filesys = blockcheck(filesys); 217 /* 218 * If -F flag specified, check to see whether a background check 219 * is possible and needed. If possible and needed, exit with 220 * status zero. Otherwise exit with status non-zero. A non-zero 221 * exit status will cause a foreground check to be run. 222 */ 223 sblock_init(); 224 if (bkgrdcheck) { 225 if ((fsreadfd = open(filesys, O_RDONLY)) < 0 || readsb(0) == 0) 226 exit(3); /* Cannot read superblock */ 227 close(fsreadfd); 228 if (sblock.fs_flags & FS_NEEDSFSCK) 229 exit(4); /* Earlier background failed */ 230 if ((sblock.fs_flags & FS_DOSOFTDEP) == 0) 231 exit(5); /* Not running soft updates */ 232 size = MIBSIZE; 233 if (sysctlnametomib("vfs.ffs.adjrefcnt", adjrefcnt, &size) < 0) 234 exit(6); /* Lacks kernel support */ 235 if ((mntp == NULL && sblock.fs_clean == 1) || 236 (mntp != NULL && (sblock.fs_flags & FS_UNCLEAN) == 0)) 237 exit(7); /* Filesystem clean, report it now */ 238 exit(0); 239 } 240 if (preen && skipclean) { 241 /* 242 * If file system is gjournaled, check it here. 243 */ 244 if ((fsreadfd = open(filesys, O_RDONLY)) < 0 || readsb(0) == 0) 245 exit(3); /* Cannot read superblock */ 246 close(fsreadfd); 247 if ((sblock.fs_flags & FS_GJOURNAL) != 0) { 248 //printf("GJournaled file system detected on %s.\n", 249 // filesys); 250 if (sblock.fs_clean == 1) { 251 pwarn("FILE SYSTEM CLEAN; SKIPPING CHECKS\n"); 252 exit(0); 253 } 254 if ((sblock.fs_flags & (FS_UNCLEAN | FS_NEEDSFSCK)) == 0) { 255 gjournal_check(filesys); 256 exit(0); 257 } else { 258 pfatal("UNEXPECTED INCONSISTENCY, %s\n", 259 "CANNOT RUN FAST FSCK\n"); 260 } 261 } 262 } 263 /* 264 * If we are to do a background check: 265 * Get the mount point information of the file system 266 * create snapshot file 267 * return created snapshot file 268 * if not found, clear bkgrdflag and proceed with normal fsck 269 */ 270 if (bkgrdflag) { 271 if (mntp == NULL) { 272 bkgrdflag = 0; 273 pfatal("NOT MOUNTED, CANNOT RUN IN BACKGROUND\n"); 274 } else if ((mntp->f_flags & MNT_SOFTDEP) == 0) { 275 bkgrdflag = 0; 276 pfatal("NOT USING SOFT UPDATES, %s\n", 277 "CANNOT RUN IN BACKGROUND"); 278 } else if ((mntp->f_flags & MNT_RDONLY) != 0) { 279 bkgrdflag = 0; 280 pfatal("MOUNTED READ-ONLY, CANNOT RUN IN BACKGROUND\n"); 281 } else if ((fsreadfd = open(filesys, O_RDONLY)) >= 0) { 282 if (readsb(0) != 0) { 283 if (sblock.fs_flags & FS_NEEDSFSCK) { 284 bkgrdflag = 0; 285 pfatal("UNEXPECTED INCONSISTENCY, %s\n", 286 "CANNOT RUN IN BACKGROUND\n"); 287 } 288 if ((sblock.fs_flags & FS_UNCLEAN) == 0 && 289 skipclean && preen) { 290 /* 291 * file system is clean; 292 * skip snapshot and report it clean 293 */ 294 pwarn("FILE SYSTEM CLEAN; %s\n", 295 "SKIPPING CHECKS"); 296 goto clean; 297 } 298 } 299 close(fsreadfd); 300 } 301 if (bkgrdflag) { 302 snprintf(snapname, sizeof snapname, "%s/.snap", 303 mntp->f_mntonname); 304 if (stat(snapname, &snapdir) < 0) { 305 if (errno != ENOENT) { 306 bkgrdflag = 0; 307 pfatal("CANNOT FIND %s %s: %s, %s\n", 308 "SNAPSHOT DIRECTORY", 309 snapname, strerror(errno), 310 "CANNOT RUN IN BACKGROUND"); 311 } else if ((grp = getgrnam("operator")) == 0 || 312 mkdir(snapname, 0770) < 0 || 313 chown(snapname, -1, grp->gr_gid) < 0 || 314 chmod(snapname, 0770) < 0) { 315 bkgrdflag = 0; 316 pfatal("CANNOT CREATE %s %s: %s, %s\n", 317 "SNAPSHOT DIRECTORY", 318 snapname, strerror(errno), 319 "CANNOT RUN IN BACKGROUND"); 320 } 321 } else if (!S_ISDIR(snapdir.st_mode)) { 322 bkgrdflag = 0; 323 pfatal("%s IS NOT A DIRECTORY, %s\n", snapname, 324 "CANNOT RUN IN BACKGROUND"); 325 } 326 } 327 if (bkgrdflag) { 328 snprintf(snapname, sizeof snapname, 329 "%s/.snap/fsck_snapshot", mntp->f_mntonname); 330 memset(&args, 0, sizeof args); 331 args.fspec = snapname; 332 while (mount("ffs", mntp->f_mntonname, 333 mntp->f_flags | MNT_UPDATE | MNT_SNAPSHOT, 334 &args) < 0) { 335 if (errno == EEXIST && unlink(snapname) == 0) 336 continue; 337 bkgrdflag = 0; 338 pfatal("CANNOT CREATE SNAPSHOT %s: %s\n", 339 snapname, strerror(errno)); 340 break; 341 } 342 if (bkgrdflag != 0) 343 filesys = snapname; 344 } 345 } 346 347 switch (setup(filesys)) { 348 case 0: 349 if (preen) 350 pfatal("CAN'T CHECK FILE SYSTEM."); 351 return (0); 352 case -1: 353 clean: 354 pwarn("clean, %ld free ", (long)(sblock.fs_cstotal.cs_nffree + 355 sblock.fs_frag * sblock.fs_cstotal.cs_nbfree)); 356 printf("(%lld frags, %lld blocks, %.1f%% fragmentation)\n", 357 (long long)sblock.fs_cstotal.cs_nffree, 358 (long long)sblock.fs_cstotal.cs_nbfree, 359 sblock.fs_cstotal.cs_nffree * 100.0 / sblock.fs_dsize); 360 return (0); 361 } 362 363 /* 364 * Cleared if any questions answered no. Used to decide if 365 * the superblock should be marked clean. 366 */ 367 resolved = 1; 368 /* 369 * 1: scan inodes tallying blocks used 370 */ 371 if (preen == 0) { 372 printf("** Last Mounted on %s\n", sblock.fs_fsmnt); 373 if (mntp != NULL && mntp->f_flags & MNT_ROOTFS) 374 printf("** Root file system\n"); 375 printf("** Phase 1 - Check Blocks and Sizes\n"); 376 } 377 pass1(); 378 379 /* 380 * 1b: locate first references to duplicates, if any 381 */ 382 if (duplist) { 383 if (preen || usedsoftdep) 384 pfatal("INTERNAL ERROR: dups with -p"); 385 printf("** Phase 1b - Rescan For More DUPS\n"); 386 pass1b(); 387 } 388 389 /* 390 * 2: traverse directories from root to mark all connected directories 391 */ 392 if (preen == 0) 393 printf("** Phase 2 - Check Pathnames\n"); 394 pass2(); 395 396 /* 397 * 3: scan inodes looking for disconnected directories 398 */ 399 if (preen == 0) 400 printf("** Phase 3 - Check Connectivity\n"); 401 pass3(); 402 403 /* 404 * 4: scan inodes looking for disconnected files; check reference counts 405 */ 406 if (preen == 0) 407 printf("** Phase 4 - Check Reference Counts\n"); 408 pass4(); 409 410 /* 411 * 5: check and repair resource counts in cylinder groups 412 */ 413 if (preen == 0) 414 printf("** Phase 5 - Check Cyl groups\n"); 415 pass5(); 416 417 /* 418 * print out summary statistics 419 */ 420 n_ffree = sblock.fs_cstotal.cs_nffree; 421 n_bfree = sblock.fs_cstotal.cs_nbfree; 422 files = maxino - ROOTINO - sblock.fs_cstotal.cs_nifree - n_files; 423 blks = n_blks + 424 sblock.fs_ncg * (cgdmin(&sblock, 0) - cgsblock(&sblock, 0)); 425 blks += cgsblock(&sblock, 0) - cgbase(&sblock, 0); 426 blks += howmany(sblock.fs_cssize, sblock.fs_fsize); 427 blks = maxfsblock - (n_ffree + sblock.fs_frag * n_bfree) - blks; 428 if (bkgrdflag && (files > 0 || blks > 0)) { 429 countdirs = sblock.fs_cstotal.cs_ndir - countdirs; 430 pwarn("Reclaimed: %ld directories, %ld files, %lld fragments\n", 431 countdirs, (long)files - countdirs, (long long)blks); 432 } 433 pwarn("%ld files, %jd used, %ju free ", 434 (long)n_files, (intmax_t)n_blks, 435 (uintmax_t)n_ffree + sblock.fs_frag * n_bfree); 436 printf("(%ju frags, %ju blocks, %.1f%% fragmentation)\n", 437 (uintmax_t)n_ffree, (uintmax_t)n_bfree, 438 n_ffree * 100.0 / sblock.fs_dsize); 439 if (debug) { 440 if (files < 0) 441 printf("%d inodes missing\n", -files); 442 if (blks < 0) 443 printf("%lld blocks missing\n", -(long long)blks); 444 if (duplist != NULL) { 445 printf("The following duplicate blocks remain:"); 446 for (dp = duplist; dp; dp = dp->next) 447 printf(" %lld,", (long long)dp->dup); 448 printf("\n"); 449 } 450 } 451 duplist = (struct dups *)0; 452 muldup = (struct dups *)0; 453 inocleanup(); 454 if (fsmodified) { 455 sblock.fs_time = time(NULL); 456 sbdirty(); 457 } 458 if (cvtlevel && sblk.b_dirty) { 459 /* 460 * Write out the duplicate super blocks 461 */ 462 for (cylno = 0; cylno < sblock.fs_ncg; cylno++) 463 blwrite(fswritefd, (char *)&sblock, 464 fsbtodb(&sblock, cgsblock(&sblock, cylno)), 465 SBLOCKSIZE); 466 } 467 if (rerun) 468 resolved = 0; 469 470 /* 471 * Check to see if the file system is mounted read-write. 472 */ 473 if (bkgrdflag == 0 && mntp != NULL && (mntp->f_flags & MNT_RDONLY) == 0) 474 resolved = 0; 475 ckfini(resolved); 476 477 for (cylno = 0; cylno < sblock.fs_ncg; cylno++) 478 if (inostathead[cylno].il_stat != NULL) 479 free((char *)inostathead[cylno].il_stat); 480 free((char *)inostathead); 481 inostathead = NULL; 482 if (fsmodified && !preen) 483 printf("\n***** FILE SYSTEM WAS MODIFIED *****\n"); 484 if (rerun) 485 printf("\n***** PLEASE RERUN FSCK *****\n"); 486 if (mntp != NULL) { 487 /* 488 * We modified a mounted file system. Do a mount update on 489 * it unless it is read-write, so we can continue using it 490 * as safely as possible. 491 */ 492 if (mntp->f_flags & MNT_RDONLY) { 493 args.fspec = 0; 494 args.export.ex_flags = 0; 495 args.export.ex_root = 0; 496 ret = mount("ufs", mntp->f_mntonname, 497 mntp->f_flags | MNT_UPDATE | MNT_RELOAD, &args); 498 if (ret == 0) 499 return (0); 500 pwarn("mount reload of '%s' failed: %s\n\n", 501 mntp->f_mntonname, strerror(errno)); 502 } 503 if (!fsmodified) 504 return (0); 505 if (!preen) 506 printf("\n***** REBOOT NOW *****\n"); 507 sync(); 508 return (4); 509 } 510 return (0); 511 } 512 513 /* 514 * Get the mount point information for name. 515 */ 516 static struct statfs * 517 getmntpt(const char *name) 518 { 519 struct stat devstat, mntdevstat; 520 char device[sizeof(_PATH_DEV) - 1 + MNAMELEN]; 521 char *ddevname; 522 struct statfs *mntbuf, *statfsp; 523 int i, mntsize, isdev; 524 525 if (stat(name, &devstat) != 0) 526 return (NULL); 527 if (S_ISCHR(devstat.st_mode) || S_ISBLK(devstat.st_mode)) 528 isdev = 1; 529 else 530 isdev = 0; 531 mntsize = getmntinfo(&mntbuf, MNT_NOWAIT); 532 for (i = 0; i < mntsize; i++) { 533 statfsp = &mntbuf[i]; 534 ddevname = statfsp->f_mntfromname; 535 if (*ddevname != '/') { 536 strcpy(device, _PATH_DEV); 537 strcat(device, ddevname); 538 strcpy(statfsp->f_mntfromname, device); 539 } 540 if (isdev == 0) { 541 if (strcmp(name, statfsp->f_mntonname)) 542 continue; 543 return (statfsp); 544 } 545 if (stat(ddevname, &mntdevstat) == 0 && 546 mntdevstat.st_rdev == devstat.st_rdev) 547 return (statfsp); 548 } 549 statfsp = NULL; 550 return (statfsp); 551 } 552 553 static void 554 usage(void) 555 { 556 (void) fprintf(stderr, 557 "usage: %s [-BFpfny] [-b block] [-c level] [-m mode] " 558 "filesystem ...\n", 559 getprogname()); 560 exit(1); 561 } 562