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