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