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 zlncnt *zlnp; 198 struct stat snapdir; 199 struct group *grp; 200 ufs2_daddr_t blks; 201 int cylno, ret; 202 ino_t files; 203 size_t size; 204 205 cdevname = filesys; 206 if (debug && preen) 207 pwarn("starting\n"); 208 /* 209 * Make best effort to get the disk name. Check first to see 210 * if it is listed among the mounted file systems. Failing that 211 * check to see if it is listed in /etc/fstab. 212 */ 213 mntp = getmntpt(filesys); 214 if (mntp != NULL) 215 filesys = mntp->f_mntfromname; 216 else 217 filesys = blockcheck(filesys); 218 /* 219 * If -F flag specified, check to see whether a background check 220 * is possible and needed. If possible and needed, exit with 221 * status zero. Otherwise exit with status non-zero. A non-zero 222 * exit status will cause a foreground check to be run. 223 */ 224 sblock_init(); 225 if (bkgrdcheck) { 226 if ((fsreadfd = open(filesys, O_RDONLY)) < 0 || readsb(0) == 0) 227 exit(3); /* Cannot read superblock */ 228 close(fsreadfd); 229 if (sblock.fs_flags & FS_NEEDSFSCK) 230 exit(4); /* Earlier background failed */ 231 if ((sblock.fs_flags & FS_DOSOFTDEP) == 0) 232 exit(5); /* Not running soft updates */ 233 size = MIBSIZE; 234 if (sysctlnametomib("vfs.ffs.adjrefcnt", adjrefcnt, &size) < 0) 235 exit(6); /* Lacks kernel support */ 236 if ((mntp == NULL && sblock.fs_clean == 1) || 237 (mntp != NULL && (sblock.fs_flags & FS_UNCLEAN) == 0)) 238 exit(7); /* Filesystem clean, report it now */ 239 exit(0); 240 } 241 /* 242 * If we are to do a background check: 243 * Get the mount point information of the file system 244 * create snapshot file 245 * return created snapshot file 246 * if not found, clear bkgrdflag and proceed with normal fsck 247 */ 248 if (bkgrdflag) { 249 if (mntp == NULL) { 250 bkgrdflag = 0; 251 pfatal("NOT MOUNTED, CANNOT RUN IN BACKGROUND\n"); 252 } else if ((mntp->f_flags & MNT_SOFTDEP) == 0) { 253 bkgrdflag = 0; 254 pfatal("NOT USING SOFT UPDATES, %s\n", 255 "CANNOT RUN IN BACKGROUND"); 256 } else if ((mntp->f_flags & MNT_RDONLY) != 0) { 257 bkgrdflag = 0; 258 pfatal("MOUNTED READ-ONLY, CANNOT RUN IN BACKGROUND\n"); 259 } else if ((fsreadfd = open(filesys, O_RDONLY)) >= 0) { 260 if (readsb(0) != 0) { 261 if (sblock.fs_flags & FS_NEEDSFSCK) { 262 bkgrdflag = 0; 263 pfatal("UNEXPECTED INCONSISTENCY, %s\n", 264 "CANNOT RUN IN BACKGROUND\n"); 265 } 266 if ((sblock.fs_flags & FS_UNCLEAN) == 0 && 267 skipclean && preen) { 268 /* 269 * file system is clean; 270 * skip snapshot and report it clean 271 */ 272 pwarn("FILE SYSTEM CLEAN; %s\n", 273 "SKIPPING CHECKS"); 274 goto clean; 275 } 276 } 277 close(fsreadfd); 278 } 279 if (bkgrdflag) { 280 snprintf(snapname, sizeof snapname, "%s/.snap", 281 mntp->f_mntonname); 282 if (stat(snapname, &snapdir) < 0) { 283 if (errno != ENOENT) { 284 bkgrdflag = 0; 285 pfatal("CANNOT FIND %s %s: %s, %s\n", 286 "SNAPSHOT DIRECTORY", 287 snapname, strerror(errno), 288 "CANNOT RUN IN BACKGROUND"); 289 } else if ((grp = getgrnam("operator")) == 0 || 290 mkdir(snapname, 0770) < 0 || 291 chown(snapname, -1, grp->gr_gid) < 0 || 292 chmod(snapname, 0770) < 0) { 293 bkgrdflag = 0; 294 pfatal("CANNOT CREATE %s %s: %s, %s\n", 295 "SNAPSHOT DIRECTORY", 296 snapname, strerror(errno), 297 "CANNOT RUN IN BACKGROUND"); 298 } 299 } else if (!S_ISDIR(snapdir.st_mode)) { 300 bkgrdflag = 0; 301 pfatal("%s IS NOT A DIRECTORY, %s\n", snapname, 302 "CANNOT RUN IN BACKGROUND"); 303 } 304 } 305 if (bkgrdflag) { 306 snprintf(snapname, sizeof snapname, 307 "%s/.snap/fsck_snapshot", mntp->f_mntonname); 308 args.fspec = snapname; 309 while (mount("ffs", mntp->f_mntonname, 310 mntp->f_flags | MNT_UPDATE | MNT_SNAPSHOT, 311 &args) < 0) { 312 if (errno == EEXIST && unlink(snapname) == 0) 313 continue; 314 bkgrdflag = 0; 315 pfatal("CANNOT CREATE SNAPSHOT %s: %s\n", 316 snapname, strerror(errno)); 317 break; 318 } 319 if (bkgrdflag != 0) 320 filesys = snapname; 321 } 322 } 323 324 switch (setup(filesys)) { 325 case 0: 326 if (preen) 327 pfatal("CAN'T CHECK FILE SYSTEM."); 328 return (0); 329 case -1: 330 clean: 331 pwarn("clean, %ld free ", (long)(sblock.fs_cstotal.cs_nffree + 332 sblock.fs_frag * sblock.fs_cstotal.cs_nbfree)); 333 printf("(%lld frags, %lld blocks, %.1f%% fragmentation)\n", 334 (long long)sblock.fs_cstotal.cs_nffree, 335 (long long)sblock.fs_cstotal.cs_nbfree, 336 sblock.fs_cstotal.cs_nffree * 100.0 / sblock.fs_dsize); 337 return (0); 338 } 339 340 /* 341 * Cleared if any questions answered no. Used to decide if 342 * the superblock should be marked clean. 343 */ 344 resolved = 1; 345 /* 346 * 1: scan inodes tallying blocks used 347 */ 348 if (preen == 0) { 349 printf("** Last Mounted on %s\n", sblock.fs_fsmnt); 350 if (mntp != NULL && mntp->f_flags & MNT_ROOTFS) 351 printf("** Root file system\n"); 352 printf("** Phase 1 - Check Blocks and Sizes\n"); 353 } 354 pass1(); 355 356 /* 357 * 1b: locate first references to duplicates, if any 358 */ 359 if (duplist) { 360 if (preen || usedsoftdep) 361 pfatal("INTERNAL ERROR: dups with -p"); 362 printf("** Phase 1b - Rescan For More DUPS\n"); 363 pass1b(); 364 } 365 366 /* 367 * 2: traverse directories from root to mark all connected directories 368 */ 369 if (preen == 0) 370 printf("** Phase 2 - Check Pathnames\n"); 371 pass2(); 372 373 /* 374 * 3: scan inodes looking for disconnected directories 375 */ 376 if (preen == 0) 377 printf("** Phase 3 - Check Connectivity\n"); 378 pass3(); 379 380 /* 381 * 4: scan inodes looking for disconnected files; check reference counts 382 */ 383 if (preen == 0) 384 printf("** Phase 4 - Check Reference Counts\n"); 385 pass4(); 386 387 /* 388 * 5: check and repair resource counts in cylinder groups 389 */ 390 if (preen == 0) 391 printf("** Phase 5 - Check Cyl groups\n"); 392 pass5(); 393 394 /* 395 * print out summary statistics 396 */ 397 n_ffree = sblock.fs_cstotal.cs_nffree; 398 n_bfree = sblock.fs_cstotal.cs_nbfree; 399 files = maxino - ROOTINO - sblock.fs_cstotal.cs_nifree - n_files; 400 blks = n_blks + 401 sblock.fs_ncg * (cgdmin(&sblock, 0) - cgsblock(&sblock, 0)); 402 blks += cgsblock(&sblock, 0) - cgbase(&sblock, 0); 403 blks += howmany(sblock.fs_cssize, sblock.fs_fsize); 404 blks = maxfsblock - (n_ffree + sblock.fs_frag * n_bfree) - blks; 405 if (bkgrdflag && (files > 0 || blks > 0)) { 406 countdirs = sblock.fs_cstotal.cs_ndir - countdirs; 407 pwarn("Reclaimed: %ld directories, %ld files, %lld fragments\n", 408 countdirs, (long)files - countdirs, (long long)blks); 409 } 410 pwarn("%ld files, %jd used, %ju free ", 411 (long)n_files, (intmax_t)n_blks, 412 (uintmax_t)n_ffree + sblock.fs_frag * n_bfree); 413 printf("(%ju frags, %ju blocks, %.1f%% fragmentation)\n", 414 (uintmax_t)n_ffree, (uintmax_t)n_bfree, 415 n_ffree * 100.0 / sblock.fs_dsize); 416 if (debug) { 417 if (files < 0) 418 printf("%d inodes missing\n", -files); 419 if (blks < 0) 420 printf("%lld blocks missing\n", -(long long)blks); 421 if (duplist != NULL) { 422 printf("The following duplicate blocks remain:"); 423 for (dp = duplist; dp; dp = dp->next) 424 printf(" %lld,", (long long)dp->dup); 425 printf("\n"); 426 } 427 if (zlnhead != NULL) { 428 printf("The following zero link count inodes remain:"); 429 for (zlnp = zlnhead; zlnp; zlnp = zlnp->next) 430 printf(" %u,", zlnp->zlncnt); 431 printf("\n"); 432 } 433 } 434 zlnhead = (struct zlncnt *)0; 435 duplist = (struct dups *)0; 436 muldup = (struct dups *)0; 437 inocleanup(); 438 if (fsmodified) { 439 sblock.fs_time = time(NULL); 440 sbdirty(); 441 } 442 if (cvtlevel && sblk.b_dirty) { 443 /* 444 * Write out the duplicate super blocks 445 */ 446 for (cylno = 0; cylno < sblock.fs_ncg; cylno++) 447 bwrite(fswritefd, (char *)&sblock, 448 fsbtodb(&sblock, cgsblock(&sblock, cylno)), 449 SBLOCKSIZE); 450 } 451 if (rerun) 452 resolved = 0; 453 454 /* 455 * Check to see if the file system is mounted read-write. 456 */ 457 if (bkgrdflag == 0 && mntp != NULL && (mntp->f_flags & MNT_RDONLY) == 0) 458 resolved = 0; 459 ckfini(resolved); 460 461 for (cylno = 0; cylno < sblock.fs_ncg; cylno++) 462 if (inostathead[cylno].il_stat != NULL) 463 free((char *)inostathead[cylno].il_stat); 464 free((char *)inostathead); 465 inostathead = NULL; 466 if (fsmodified && !preen) 467 printf("\n***** FILE SYSTEM WAS MODIFIED *****\n"); 468 if (rerun) 469 printf("\n***** PLEASE RERUN FSCK *****\n"); 470 if (mntp != NULL) { 471 /* 472 * We modified a mounted file system. Do a mount update on 473 * it unless it is read-write, so we can continue using it 474 * as safely as possible. 475 */ 476 if (mntp->f_flags & MNT_RDONLY) { 477 args.fspec = 0; 478 args.export.ex_flags = 0; 479 args.export.ex_root = 0; 480 ret = mount("ufs", mntp->f_mntonname, 481 mntp->f_flags | MNT_UPDATE | MNT_RELOAD, &args); 482 if (ret == 0) 483 return (0); 484 pwarn("mount reload of '%s' failed: %s\n\n", 485 mntp->f_mntonname, strerror(errno)); 486 } 487 if (!fsmodified) 488 return (0); 489 if (!preen) 490 printf("\n***** REBOOT NOW *****\n"); 491 sync(); 492 return (4); 493 } 494 return (0); 495 } 496 497 /* 498 * Get the mount point information for name. 499 */ 500 static struct statfs * 501 getmntpt(const char *name) 502 { 503 struct stat devstat, mntdevstat; 504 char device[sizeof(_PATH_DEV) - 1 + MNAMELEN]; 505 char *ddevname; 506 struct statfs *mntbuf, *statfsp; 507 int i, mntsize, isdev; 508 509 if (stat(name, &devstat) != 0) 510 return (NULL); 511 if (S_ISCHR(devstat.st_mode) || S_ISBLK(devstat.st_mode)) 512 isdev = 1; 513 else 514 isdev = 0; 515 mntsize = getmntinfo(&mntbuf, MNT_NOWAIT); 516 for (i = 0; i < mntsize; i++) { 517 statfsp = &mntbuf[i]; 518 ddevname = statfsp->f_mntfromname; 519 if (*ddevname != '/') { 520 strcpy(device, _PATH_DEV); 521 strcat(device, ddevname); 522 strcpy(statfsp->f_mntfromname, device); 523 } 524 if (isdev == 0) { 525 if (strcmp(name, statfsp->f_mntonname)) 526 continue; 527 return (statfsp); 528 } 529 if (stat(ddevname, &mntdevstat) == 0 && 530 mntdevstat.st_rdev == devstat.st_rdev) 531 return (statfsp); 532 } 533 statfsp = NULL; 534 return (statfsp); 535 } 536 537 static void 538 usage(void) 539 { 540 (void) fprintf(stderr, 541 "usage: %s [-BFpfny] [-b block] [-c level] [-m mode] " 542 "file system ...\n", 543 getprogname()); 544 exit(1); 545 } 546