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 * 3. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 */ 33 34 #if 0 35 #ifndef lint 36 static const char copyright[] = 37 "@(#) Copyright (c) 1980, 1986, 1993\n\ 38 The Regents of the University of California. All rights reserved.\n"; 39 #endif /* not lint */ 40 41 #ifndef lint 42 static char sccsid[] = "@(#)main.c 8.6 (Berkeley) 5/14/95"; 43 #endif /* not lint */ 44 #endif 45 #include <sys/cdefs.h> 46 __FBSDID("$FreeBSD$"); 47 48 #include <sys/param.h> 49 #include <sys/stat.h> 50 #include <sys/file.h> 51 #include <sys/time.h> 52 #include <sys/mount.h> 53 #include <sys/resource.h> 54 #include <sys/sysctl.h> 55 #include <sys/disklabel.h> 56 57 #include <ufs/ufs/dinode.h> 58 #include <ufs/ufs/ufsmount.h> 59 #include <ufs/ffs/fs.h> 60 61 #include <err.h> 62 #include <errno.h> 63 #include <fstab.h> 64 #include <paths.h> 65 #include <stdint.h> 66 #include <string.h> 67 68 #include "fsck.h" 69 70 static void usage(void) __dead2; 71 static int argtoi(int flag, const char *req, const char *str, int base); 72 static int checkfilesys(char *filesys); 73 static struct statfs *getmntpt(const char *); 74 75 int 76 main(int argc, char *argv[]) 77 { 78 int ch; 79 struct rlimit rlimit; 80 int ret = 0; 81 82 sync(); 83 skipclean = 1; 84 while ((ch = getopt(argc, argv, "b:Bc:dfFm:npy")) != -1) { 85 switch (ch) { 86 case 'b': 87 skipclean = 0; 88 bflag = argtoi('b', "number", optarg, 10); 89 printf("Alternate super block location: %d\n", bflag); 90 break; 91 92 case 'B': 93 bkgrdflag = 1; 94 break; 95 96 case 'c': 97 skipclean = 0; 98 cvtlevel = argtoi('c', "conversion level", optarg, 10); 99 if (cvtlevel < 3) 100 errx(EEXIT, "cannot do level %d conversion", 101 cvtlevel); 102 break; 103 104 case 'd': 105 debug++; 106 break; 107 108 case 'f': 109 skipclean = 0; 110 break; 111 112 case 'F': 113 bkgrdcheck = 1; 114 break; 115 116 case 'm': 117 lfmode = argtoi('m', "mode", optarg, 8); 118 if (lfmode &~ 07777) 119 errx(EEXIT, "bad mode to -m: %o", lfmode); 120 printf("** lost+found creation mode %o\n", lfmode); 121 break; 122 123 case 'n': 124 nflag++; 125 yflag = 0; 126 break; 127 128 case 'p': 129 preen++; 130 break; 131 132 case 'y': 133 yflag++; 134 nflag = 0; 135 break; 136 137 default: 138 usage(); 139 } 140 } 141 argc -= optind; 142 argv += optind; 143 144 if (!argc) 145 usage(); 146 147 if (signal(SIGINT, SIG_IGN) != SIG_IGN) 148 (void)signal(SIGINT, catch); 149 if (preen) 150 (void)signal(SIGQUIT, catchquit); 151 signal(SIGINFO, infohandler); 152 /* 153 * Push up our allowed memory limit so we can cope 154 * with huge file systems. 155 */ 156 if (getrlimit(RLIMIT_DATA, &rlimit) == 0) { 157 rlimit.rlim_cur = rlimit.rlim_max; 158 (void)setrlimit(RLIMIT_DATA, &rlimit); 159 } 160 while (argc-- > 0) 161 (void)checkfilesys(*argv++); 162 163 if (returntosingle) 164 ret = 2; 165 exit(ret); 166 } 167 168 static int 169 argtoi(int flag, const char *req, const char *str, int base) 170 { 171 char *cp; 172 int ret; 173 174 ret = (int)strtol(str, &cp, base); 175 if (cp == str || *cp) 176 errx(EEXIT, "-%c flag requires a %s", flag, req); 177 return (ret); 178 } 179 180 /* 181 * Check the specified file system. 182 */ 183 /* ARGSUSED */ 184 static int 185 checkfilesys(char *filesys) 186 { 187 ufs2_daddr_t n_ffree, n_bfree; 188 struct ufs_args args; 189 struct dups *dp; 190 struct statfs *mntp; 191 struct zlncnt *zlnp; 192 ufs2_daddr_t blks; 193 int cylno, ret; 194 ino_t files; 195 size_t size; 196 197 cdevname = filesys; 198 if (debug && preen) 199 pwarn("starting\n"); 200 /* 201 * Make best effort to get the disk name. Check first to see 202 * if it is listed among the mounted file systems. Failing that 203 * check to see if it is listed in /etc/fstab. 204 */ 205 mntp = getmntpt(filesys); 206 if (mntp != NULL) 207 filesys = mntp->f_mntfromname; 208 else 209 filesys = blockcheck(filesys); 210 /* 211 * If -F flag specified, check to see whether a background check 212 * is possible and needed. If possible and needed, exit with 213 * status zero. Otherwise exit with status non-zero. A non-zero 214 * exit status will cause a foreground check to be run. 215 */ 216 sblock_init(); 217 if (bkgrdcheck) { 218 if ((fsreadfd = open(filesys, O_RDONLY)) < 0 || readsb(0) == 0) 219 exit(3); /* Cannot read superblock */ 220 close(fsreadfd); 221 if (sblock.fs_flags & FS_NEEDSFSCK) 222 exit(4); /* Earlier background failed */ 223 if ((sblock.fs_flags & FS_DOSOFTDEP) == 0) 224 exit(5); /* Not running soft updates */ 225 size = MIBSIZE; 226 if (sysctlnametomib("vfs.ffs.adjrefcnt", adjrefcnt, &size) < 0) 227 exit(6); /* Lacks kernel support */ 228 if ((mntp == NULL && sblock.fs_clean == 1) || 229 (mntp != NULL && (sblock.fs_flags & FS_UNCLEAN) == 0)) 230 exit(7); /* Filesystem clean, report it now */ 231 exit(0); 232 } 233 /* 234 * If we are to do a background check: 235 * Get the mount point information of the file system 236 * create snapshot file 237 * return created snapshot file 238 * if not found, clear bkgrdflag and proceed with normal fsck 239 */ 240 if (bkgrdflag) { 241 if (mntp == NULL) { 242 bkgrdflag = 0; 243 pfatal("NOT MOUNTED, CANNOT RUN IN BACKGROUND\n"); 244 } else if ((mntp->f_flags & MNT_SOFTDEP) == 0) { 245 bkgrdflag = 0; 246 pfatal("NOT USING SOFT UPDATES, %s\n", 247 "CANNOT RUN IN BACKGROUND"); 248 } else if ((mntp->f_flags & MNT_RDONLY) != 0) { 249 bkgrdflag = 0; 250 pfatal("MOUNTED READ-ONLY, CANNOT RUN IN BACKGROUND\n"); 251 } else if ((fsreadfd = open(filesys, O_RDONLY)) >= 0) { 252 if (readsb(0) != 0) { 253 if (sblock.fs_flags & FS_NEEDSFSCK) { 254 bkgrdflag = 0; 255 pfatal("UNEXPECTED INCONSISTENCY, %s\n", 256 "CANNOT RUN IN BACKGROUND\n"); 257 } 258 if ((sblock.fs_flags & FS_UNCLEAN) == 0 && 259 skipclean && preen) { 260 /* 261 * file system is clean; 262 * skip snapshot and report it clean 263 */ 264 pwarn("FILE SYSTEM CLEAN; %s\n", 265 "SKIPPING CHECKS"); 266 goto clean; 267 } 268 } 269 close(fsreadfd); 270 } 271 if (bkgrdflag) { 272 snprintf(snapname, sizeof snapname, "%s/.fsck_snapshot", 273 mntp->f_mntonname); 274 args.fspec = snapname; 275 while (mount("ffs", mntp->f_mntonname, 276 mntp->f_flags | MNT_UPDATE | MNT_SNAPSHOT, 277 &args) < 0) { 278 if (errno == EEXIST && unlink(snapname) == 0) 279 continue; 280 bkgrdflag = 0; 281 pfatal("CANNOT CREATE SNAPSHOT %s: %s\n", 282 snapname, strerror(errno)); 283 break; 284 } 285 if (bkgrdflag != 0) 286 filesys = snapname; 287 } 288 } 289 290 switch (setup(filesys)) { 291 case 0: 292 if (preen) 293 pfatal("CAN'T CHECK FILE SYSTEM."); 294 return (0); 295 case -1: 296 clean: 297 pwarn("clean, %ld free ", (long)(sblock.fs_cstotal.cs_nffree + 298 sblock.fs_frag * sblock.fs_cstotal.cs_nbfree)); 299 printf("(%lld frags, %lld blocks, %.1f%% fragmentation)\n", 300 (long long)sblock.fs_cstotal.cs_nffree, 301 (long long)sblock.fs_cstotal.cs_nbfree, 302 sblock.fs_cstotal.cs_nffree * 100.0 / sblock.fs_dsize); 303 return (0); 304 } 305 306 /* 307 * Cleared if any questions answered no. Used to decide if 308 * the superblock should be marked clean. 309 */ 310 resolved = 1; 311 /* 312 * 1: scan inodes tallying blocks used 313 */ 314 if (preen == 0) { 315 printf("** Last Mounted on %s\n", sblock.fs_fsmnt); 316 if (mntp != NULL && mntp->f_flags & MNT_ROOTFS) 317 printf("** Root file system\n"); 318 printf("** Phase 1 - Check Blocks and Sizes\n"); 319 } 320 pass1(); 321 322 /* 323 * 1b: locate first references to duplicates, if any 324 */ 325 if (duplist) { 326 if (preen || usedsoftdep) 327 pfatal("INTERNAL ERROR: dups with -p"); 328 printf("** Phase 1b - Rescan For More DUPS\n"); 329 pass1b(); 330 } 331 332 /* 333 * 2: traverse directories from root to mark all connected directories 334 */ 335 if (preen == 0) 336 printf("** Phase 2 - Check Pathnames\n"); 337 pass2(); 338 339 /* 340 * 3: scan inodes looking for disconnected directories 341 */ 342 if (preen == 0) 343 printf("** Phase 3 - Check Connectivity\n"); 344 pass3(); 345 346 /* 347 * 4: scan inodes looking for disconnected files; check reference counts 348 */ 349 if (preen == 0) 350 printf("** Phase 4 - Check Reference Counts\n"); 351 pass4(); 352 353 /* 354 * 5: check and repair resource counts in cylinder groups 355 */ 356 if (preen == 0) 357 printf("** Phase 5 - Check Cyl groups\n"); 358 pass5(); 359 360 /* 361 * print out summary statistics 362 */ 363 n_ffree = sblock.fs_cstotal.cs_nffree; 364 n_bfree = sblock.fs_cstotal.cs_nbfree; 365 files = maxino - ROOTINO - sblock.fs_cstotal.cs_nifree - n_files; 366 blks = n_blks + 367 sblock.fs_ncg * (cgdmin(&sblock, 0) - cgsblock(&sblock, 0)); 368 blks += cgsblock(&sblock, 0) - cgbase(&sblock, 0); 369 blks += howmany(sblock.fs_cssize, sblock.fs_fsize); 370 blks = maxfsblock - (n_ffree + sblock.fs_frag * n_bfree) - blks; 371 if (bkgrdflag && (files > 0 || blks > 0)) { 372 countdirs = sblock.fs_cstotal.cs_ndir - countdirs; 373 pwarn("Reclaimed: %ld directories, %ld files, %lld fragments\n", 374 countdirs, (long)files - countdirs, (long long)blks); 375 } 376 pwarn("%ld files, %jd used, %ju free ", 377 (long)n_files, (intmax_t)n_blks, 378 (uintmax_t)n_ffree + sblock.fs_frag * n_bfree); 379 printf("(%ju frags, %ju blocks, %.1f%% fragmentation)\n", 380 (uintmax_t)n_ffree, (uintmax_t)n_bfree, 381 n_ffree * 100.0 / sblock.fs_dsize); 382 if (debug) { 383 if (files < 0) 384 printf("%d inodes missing\n", -files); 385 if (blks < 0) 386 printf("%lld blocks missing\n", -(long long)blks); 387 if (duplist != NULL) { 388 printf("The following duplicate blocks remain:"); 389 for (dp = duplist; dp; dp = dp->next) 390 printf(" %lld,", (long long)dp->dup); 391 printf("\n"); 392 } 393 if (zlnhead != NULL) { 394 printf("The following zero link count inodes remain:"); 395 for (zlnp = zlnhead; zlnp; zlnp = zlnp->next) 396 printf(" %u,", zlnp->zlncnt); 397 printf("\n"); 398 } 399 } 400 zlnhead = (struct zlncnt *)0; 401 duplist = (struct dups *)0; 402 muldup = (struct dups *)0; 403 inocleanup(); 404 if (fsmodified) { 405 sblock.fs_time = time(NULL); 406 sbdirty(); 407 } 408 if (cvtlevel && sblk.b_dirty) { 409 /* 410 * Write out the duplicate super blocks 411 */ 412 for (cylno = 0; cylno < sblock.fs_ncg; cylno++) 413 bwrite(fswritefd, (char *)&sblock, 414 fsbtodb(&sblock, cgsblock(&sblock, cylno)), 415 SBLOCKSIZE); 416 } 417 if (rerun) 418 resolved = 0; 419 420 /* 421 * Check to see if the file system is mounted read-write. 422 */ 423 if (bkgrdflag == 0 && mntp != NULL && (mntp->f_flags & MNT_RDONLY) == 0) 424 resolved = 0; 425 ckfini(resolved); 426 427 for (cylno = 0; cylno < sblock.fs_ncg; cylno++) 428 if (inostathead[cylno].il_stat != NULL) 429 free((char *)inostathead[cylno].il_stat); 430 free((char *)inostathead); 431 inostathead = NULL; 432 if (fsmodified && !preen) 433 printf("\n***** FILE SYSTEM WAS MODIFIED *****\n"); 434 if (rerun) 435 printf("\n***** PLEASE RERUN FSCK *****\n"); 436 if (mntp != NULL) { 437 /* 438 * We modified a mounted file system. Do a mount update on 439 * it unless it is read-write, so we can continue using it 440 * as safely as possible. 441 */ 442 if (mntp->f_flags & MNT_RDONLY) { 443 args.fspec = 0; 444 args.export.ex_flags = 0; 445 args.export.ex_root = 0; 446 ret = mount("ufs", mntp->f_mntonname, 447 mntp->f_flags | MNT_UPDATE | MNT_RELOAD, &args); 448 if (ret == 0) 449 return (0); 450 pwarn("mount reload of '%s' failed: %s\n\n", 451 mntp->f_mntonname, strerror(errno)); 452 } 453 if (!fsmodified) 454 return (0); 455 if (!preen) 456 printf("\n***** REBOOT NOW *****\n"); 457 sync(); 458 return (4); 459 } 460 return (0); 461 } 462 463 /* 464 * Get the mount point information for name. 465 */ 466 static struct statfs * 467 getmntpt(const char *name) 468 { 469 struct stat devstat, mntdevstat; 470 char device[sizeof(_PATH_DEV) - 1 + MNAMELEN]; 471 char *ddevname; 472 struct statfs *mntbuf, *statfsp; 473 int i, mntsize, isdev; 474 475 if (stat(name, &devstat) != 0) 476 return (NULL); 477 if (S_ISCHR(devstat.st_mode) || S_ISBLK(devstat.st_mode)) 478 isdev = 1; 479 else 480 isdev = 0; 481 mntsize = getmntinfo(&mntbuf, MNT_NOWAIT); 482 for (i = 0; i < mntsize; i++) { 483 statfsp = &mntbuf[i]; 484 ddevname = statfsp->f_mntfromname; 485 if (*ddevname != '/') { 486 strcpy(device, _PATH_DEV); 487 strcat(device, ddevname); 488 strcpy(statfsp->f_mntfromname, device); 489 } 490 if (isdev == 0) { 491 if (strcmp(name, statfsp->f_mntonname)) 492 continue; 493 return (statfsp); 494 } 495 if (stat(ddevname, &mntdevstat) == 0 && 496 mntdevstat.st_rdev == devstat.st_rdev) 497 return (statfsp); 498 } 499 statfsp = NULL; 500 return (statfsp); 501 } 502 503 static void 504 usage(void) 505 { 506 (void) fprintf(stderr, 507 "usage: %s [-BFpfny] [-b block] [-c level] [-m mode] " 508 "file system ...\n", 509 getprogname()); 510 exit(1); 511 } 512