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 #endif /* not lint */ 45 46 #include <sys/cdefs.h> 47 __FBSDID("$FreeBSD$"); 48 49 #include <sys/param.h> 50 #include <sys/stat.h> 51 #include <sys/file.h> 52 #include <sys/time.h> 53 #include <sys/mount.h> 54 #include <sys/resource.h> 55 #include <sys/sysctl.h> 56 #include <sys/disklabel.h> 57 58 #include <ufs/ufs/dinode.h> 59 #include <ufs/ufs/ufsmount.h> 60 #include <ufs/ffs/fs.h> 61 62 #include <err.h> 63 #include <errno.h> 64 #include <fstab.h> 65 #include <paths.h> 66 #include <string.h> 67 68 #include "fsck.h" 69 70 static void usage(void) __dead2; 71 static int argtoi(int flag, char *req, 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 filesystems. 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, char *req, 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 filesystem. 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, size; 194 ino_t files; 195 196 cdevname = filesys; 197 if (debug && preen) 198 pwarn("starting\n"); 199 /* 200 * Make best effort to get the disk name. Check first to see 201 * if it is listed among the mounted filesystems. Failing that 202 * check to see if it is listed in /etc/fstab. 203 */ 204 mntp = getmntpt(filesys); 205 if (mntp != NULL) 206 filesys = mntp->f_mntfromname; 207 else 208 filesys = blockcheck(filesys); 209 /* 210 * If -F flag specified, check to see whether a background check 211 * is possible and needed. If possible and needed, exit with 212 * status zero. Otherwise exit with status non-zero. A non-zero 213 * exit status will cause a foreground check to be run. 214 */ 215 sblock_init(); 216 if (bkgrdcheck) { 217 if ((fsreadfd = open(filesys, O_RDONLY)) < 0 || readsb(0) == 0) 218 exit(3); /* Cannot read superblock */ 219 close(fsreadfd); 220 if (sblock.fs_flags & FS_NEEDSFSCK) 221 exit(4); /* Earlier background failed */ 222 if ((sblock.fs_flags & FS_DOSOFTDEP) == 0) 223 exit(5); /* Not running soft updates */ 224 size = MIBSIZE; 225 if (sysctlnametomib("vfs.ffs.adjrefcnt", adjrefcnt, &size) < 0) 226 exit(6); /* Lacks kernel support */ 227 if ((mntp == NULL && sblock.fs_clean == 1) || 228 (mntp != NULL && (sblock.fs_flags & FS_UNCLEAN) == 0)) 229 exit(7); /* Filesystem clean, report it now */ 230 exit(0); 231 } 232 /* 233 * If we are to do a background check: 234 * Get the mount point information of the filesystem 235 * create snapshot file 236 * return created snapshot file 237 * if not found, clear bkgrdflag and proceed with normal fsck 238 */ 239 if (bkgrdflag) { 240 if (mntp == NULL) { 241 bkgrdflag = 0; 242 pfatal("NOT MOUNTED, CANNOT RUN IN BACKGROUND\n"); 243 } else if ((mntp->f_flags & MNT_SOFTDEP) == 0) { 244 bkgrdflag = 0; 245 pfatal("NOT USING SOFT UPDATES, %s\n", 246 "CANNOT RUN IN BACKGROUND"); 247 } else if ((mntp->f_flags & MNT_RDONLY) != 0) { 248 bkgrdflag = 0; 249 pfatal("MOUNTED READ-ONLY, CANNOT RUN IN BACKGROUND\n"); 250 } else if ((fsreadfd = open(filesys, O_RDONLY)) >= 0) { 251 if (readsb(0) != 0) { 252 if (sblock.fs_flags & FS_NEEDSFSCK) { 253 bkgrdflag = 0; 254 pfatal("UNEXPECTED INCONSISTENCY, %s\n", 255 "CANNOT RUN IN BACKGROUND\n"); 256 } 257 if ((sblock.fs_flags & FS_UNCLEAN) == 0 && 258 skipclean && preen) { 259 /* 260 * filesystem is clean; 261 * skip snapshot and report it clean 262 */ 263 pwarn("FILESYSTEM CLEAN; %s\n", 264 "SKIPPING CHECKS"); 265 goto clean; 266 } 267 } 268 close(fsreadfd); 269 } 270 if (bkgrdflag) { 271 snprintf(snapname, sizeof snapname, "%s/.fsck_snapshot", 272 mntp->f_mntonname); 273 args.fspec = snapname; 274 while (mount("ffs", mntp->f_mntonname, 275 mntp->f_flags | MNT_UPDATE | MNT_SNAPSHOT, 276 &args) < 0) { 277 if (errno == EEXIST && unlink(snapname) == 0) 278 continue; 279 bkgrdflag = 0; 280 pfatal("CANNOT CREATE SNAPSHOT %s: %s\n", 281 snapname, strerror(errno)); 282 break; 283 } 284 if (bkgrdflag != 0) 285 filesys = snapname; 286 } 287 } 288 289 switch (setup(filesys)) { 290 case 0: 291 if (preen) 292 pfatal("CAN'T CHECK FILE SYSTEM."); 293 return (0); 294 case -1: 295 clean: 296 pwarn("clean, %ld free ", (long)(sblock.fs_cstotal.cs_nffree + 297 sblock.fs_frag * sblock.fs_cstotal.cs_nbfree)); 298 printf("(%d frags, %d blocks, %.1f%% fragmentation)\n", 299 sblock.fs_cstotal.cs_nffree, sblock.fs_cstotal.cs_nbfree, 300 sblock.fs_cstotal.cs_nffree * 100.0 / sblock.fs_dsize); 301 return (0); 302 } 303 304 /* 305 * Cleared if any questions answered no. Used to decide if 306 * the superblock should be marked clean. 307 */ 308 resolved = 1; 309 /* 310 * 1: scan inodes tallying blocks used 311 */ 312 if (preen == 0) { 313 printf("** Last Mounted on %s\n", sblock.fs_fsmnt); 314 if (mntp != NULL && mntp->f_flags & MNT_ROOTFS) 315 printf("** Root filesystem\n"); 316 printf("** Phase 1 - Check Blocks and Sizes\n"); 317 } 318 pass1(); 319 320 /* 321 * 1b: locate first references to duplicates, if any 322 */ 323 if (duplist) { 324 if (preen || usedsoftdep) 325 pfatal("INTERNAL ERROR: dups with -p"); 326 printf("** Phase 1b - Rescan For More DUPS\n"); 327 pass1b(); 328 } 329 330 /* 331 * 2: traverse directories from root to mark all connected directories 332 */ 333 if (preen == 0) 334 printf("** Phase 2 - Check Pathnames\n"); 335 pass2(); 336 337 /* 338 * 3: scan inodes looking for disconnected directories 339 */ 340 if (preen == 0) 341 printf("** Phase 3 - Check Connectivity\n"); 342 pass3(); 343 344 /* 345 * 4: scan inodes looking for disconnected files; check reference counts 346 */ 347 if (preen == 0) 348 printf("** Phase 4 - Check Reference Counts\n"); 349 pass4(); 350 351 /* 352 * 5: check and repair resource counts in cylinder groups 353 */ 354 if (preen == 0) 355 printf("** Phase 5 - Check Cyl groups\n"); 356 pass5(); 357 358 /* 359 * print out summary statistics 360 */ 361 n_ffree = sblock.fs_cstotal.cs_nffree; 362 n_bfree = sblock.fs_cstotal.cs_nbfree; 363 files = maxino - ROOTINO - sblock.fs_cstotal.cs_nifree - n_files; 364 blks = n_blks + 365 sblock.fs_ncg * (cgdmin(&sblock, 0) - cgsblock(&sblock, 0)); 366 blks += cgsblock(&sblock, 0) - cgbase(&sblock, 0); 367 blks += howmany(sblock.fs_cssize, sblock.fs_fsize); 368 blks = maxfsblock - (n_ffree + sblock.fs_frag * n_bfree) - blks; 369 if (bkgrdflag && (files > 0 || blks > 0)) { 370 countdirs = sblock.fs_cstotal.cs_ndir - countdirs; 371 pwarn("Reclaimed: %ld directories, %ld files, %d fragments\n", 372 countdirs, (long)files - countdirs, blks); 373 } 374 pwarn("%ld files, %ld used, %qu free ", 375 (long)n_files, (long)n_blks, n_ffree + sblock.fs_frag * n_bfree); 376 printf("(%qu frags, %qu blocks, %.1f%% fragmentation)\n", 377 n_ffree, n_bfree, n_ffree * 100.0 / sblock.fs_dsize); 378 if (debug) { 379 if (files < 0) 380 printf("%d inodes missing\n", -files); 381 if (blks < 0) 382 printf("%d blocks missing\n", -blks); 383 if (duplist != NULL) { 384 printf("The following duplicate blocks remain:"); 385 for (dp = duplist; dp; dp = dp->next) 386 printf(" %d,", dp->dup); 387 printf("\n"); 388 } 389 if (zlnhead != NULL) { 390 printf("The following zero link count inodes remain:"); 391 for (zlnp = zlnhead; zlnp; zlnp = zlnp->next) 392 printf(" %u,", zlnp->zlncnt); 393 printf("\n"); 394 } 395 } 396 zlnhead = (struct zlncnt *)0; 397 duplist = (struct dups *)0; 398 muldup = (struct dups *)0; 399 inocleanup(); 400 if (fsmodified) { 401 sblock.fs_time = time(NULL); 402 sbdirty(); 403 } 404 if (cvtlevel && sblk.b_dirty) { 405 /* 406 * Write out the duplicate super blocks 407 */ 408 for (cylno = 0; cylno < sblock.fs_ncg; cylno++) 409 bwrite(fswritefd, (char *)&sblock, 410 fsbtodb(&sblock, cgsblock(&sblock, cylno)), 411 SBLOCKSIZE); 412 } 413 if (rerun) 414 resolved = 0; 415 416 /* 417 * Check to see if the filesystem is mounted read-write. 418 */ 419 if (bkgrdflag == 0 && mntp != NULL && (mntp->f_flags & MNT_RDONLY) == 0) 420 resolved = 0; 421 ckfini(resolved); 422 423 for (cylno = 0; cylno < sblock.fs_ncg; cylno++) 424 if (inostathead[cylno].il_stat != NULL) 425 free((char *)inostathead[cylno].il_stat); 426 free((char *)inostathead); 427 inostathead = NULL; 428 if (fsmodified && !preen) 429 printf("\n***** FILE SYSTEM WAS MODIFIED *****\n"); 430 if (rerun) 431 printf("\n***** PLEASE RERUN FSCK *****\n"); 432 if (mntp != NULL) { 433 struct ufs_args args; 434 int ret; 435 /* 436 * We modified a mounted filesystem. Do a mount update on 437 * it unless it is read-write, so we can continue using it 438 * as safely as possible. 439 */ 440 if (mntp->f_flags & MNT_RDONLY) { 441 args.fspec = 0; 442 args.export.ex_flags = 0; 443 args.export.ex_root = 0; 444 ret = mount("ufs", mntp->f_mntonname, 445 mntp->f_flags | MNT_UPDATE | MNT_RELOAD, &args); 446 if (ret == 0) 447 return (0); 448 pwarn("mount reload of '%s' failed: %s\n\n", 449 mntp->f_mntonname, strerror(errno)); 450 } 451 if (!fsmodified) 452 return (0); 453 if (!preen) 454 printf("\n***** REBOOT NOW *****\n"); 455 sync(); 456 return (4); 457 } 458 return (0); 459 } 460 461 /* 462 * Get the mount point information for name. 463 */ 464 static struct statfs * 465 getmntpt(const char *name) 466 { 467 struct stat devstat, mntdevstat; 468 char device[sizeof(_PATH_DEV) - 1 + MNAMELEN]; 469 char *devname; 470 struct statfs *mntbuf, *statfsp; 471 int i, mntsize, isdev; 472 473 if (stat(name, &devstat) != 0) 474 return (NULL); 475 if (S_ISCHR(devstat.st_mode) || S_ISBLK(devstat.st_mode)) 476 isdev = 1; 477 else 478 isdev = 0; 479 mntsize = getmntinfo(&mntbuf, MNT_NOWAIT); 480 for (i = 0; i < mntsize; i++) { 481 statfsp = &mntbuf[i]; 482 devname = statfsp->f_mntfromname; 483 if (*devname != '/') { 484 strcpy(device, _PATH_DEV); 485 strcat(device, devname); 486 strcpy(statfsp->f_mntfromname, device); 487 } 488 if (isdev == 0) { 489 if (strcmp(name, statfsp->f_mntonname)) 490 continue; 491 return (statfsp); 492 } 493 if (stat(devname, &mntdevstat) == 0 && 494 mntdevstat.st_rdev == devstat.st_rdev) 495 return (statfsp); 496 } 497 statfsp = NULL; 498 return (statfsp); 499 } 500 501 static void 502 usage(void) 503 { 504 (void) fprintf(stderr, 505 "usage: %s [-BFpfny] [-b block] [-c level] [-m mode] " 506 "filesystem ...\n", 507 getprogname()); 508 exit(1); 509 } 510