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 55 #include <ufs/ufs/dinode.h> 56 #include <ufs/ufs/ufsmount.h> 57 #include <ufs/ffs/fs.h> 58 59 #include <err.h> 60 #include <errno.h> 61 #include <fstab.h> 62 #include <paths.h> 63 64 #include "fsck.h" 65 66 static void usage __P((void)); 67 static int argtoi __P((int flag, char *req, char *str, int base)); 68 static int docheck __P((struct fstab *fsp)); 69 static int checkfilesys __P((char *filesys, char *mntpt, long auxdata, 70 int child)); 71 static struct statfs *getmntpt __P((const char *)); 72 int main __P((int argc, char *argv[])); 73 74 int 75 main(argc, argv) 76 int argc; 77 char *argv[]; 78 { 79 int ch; 80 struct rlimit rlimit; 81 int ret = 0; 82 83 sync(); 84 skipclean = 1; 85 while ((ch = getopt(argc, argv, "b:Bc:dfFm:npy")) != -1) { 86 switch (ch) { 87 case 'b': 88 skipclean = 0; 89 bflag = argtoi('b', "number", optarg, 10); 90 printf("Alternate super block location: %d\n", bflag); 91 break; 92 93 case 'B': 94 bkgrdflag = 1; 95 break; 96 97 case 'c': 98 skipclean = 0; 99 cvtlevel = argtoi('c', "conversion level", optarg, 10); 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 /* 151 * Push up our allowed memory limit so we can cope 152 * with huge filesystems. 153 */ 154 if (getrlimit(RLIMIT_DATA, &rlimit) == 0) { 155 rlimit.rlim_cur = rlimit.rlim_max; 156 (void)setrlimit(RLIMIT_DATA, &rlimit); 157 } 158 while (argc-- > 0) 159 (void)checkfilesys(*argv++, 0, 0L, 0); 160 161 if (returntosingle) 162 ret = 2; 163 exit(ret); 164 } 165 166 static int 167 argtoi(flag, req, str, base) 168 int flag; 169 char *req, *str; 170 int base; 171 { 172 char *cp; 173 int ret; 174 175 ret = (int)strtol(str, &cp, base); 176 if (cp == str || *cp) 177 errx(EEXIT, "-%c flag requires a %s", flag, req); 178 return (ret); 179 } 180 181 /* 182 * Check the specified filesystem. 183 */ 184 /* ARGSUSED */ 185 static int 186 checkfilesys(filesys, mntpt, auxdata, child) 187 char *filesys, *mntpt; 188 long auxdata; 189 int child; 190 { 191 ufs_daddr_t n_ffree, n_bfree; 192 struct ufs_args args; 193 struct dups *dp; 194 struct statfs *mntp; 195 struct zlncnt *zlnp; 196 ufs_daddr_t blks; 197 ufs_daddr_t files; 198 int cylno, size; 199 200 if (preen && child) 201 (void)signal(SIGQUIT, voidquit); 202 cdevname = filesys; 203 if (debug && preen) 204 pwarn("starting\n"); 205 /* 206 * Make best effort to get the disk name. Check first to see 207 * if it is listed among the mounted filesystems. Failing that 208 * check to see if it is listed in /etc/fstab. 209 */ 210 mntp = getmntpt(filesys); 211 if (mntp != NULL) 212 filesys = mntp->f_mntfromname; 213 else 214 filesys = blockcheck(filesys); 215 /* 216 * If -F flag specified, check to see whether a background check 217 * is possible and needed. If possible and needed, exit with 218 * status zero. Otherwise exit with status non-zero. A non-zero 219 * exit status will cause a foreground check to be run. 220 */ 221 sblock_init(); 222 if (bkgrdcheck) { 223 if ((fsreadfd = open(filesys, O_RDONLY)) < 0 || readsb(0) == 0) 224 exit(3); /* Cannot read superblock */ 225 close(fsreadfd); 226 if (sblock.fs_flags & FS_NEEDSFSCK) 227 exit(4); /* Earlier background failed */ 228 if ((sblock.fs_flags & FS_DOSOFTDEP) == 0) 229 exit(5); /* Not running soft updates */ 230 size = MIBSIZE; 231 if (sysctlnametomib("vfs.ffs.adjrefcnt", adjrefcnt, &size) < 0) 232 exit(6); /* Lacks kernel support */ 233 if ((mntp == NULL && sblock.fs_clean == 1) || 234 (mntp != NULL && (sblock.fs_flags & FS_UNCLEAN) == 0)) 235 exit(7); /* Filesystem clean, report it now */ 236 exit(0); 237 } 238 /* 239 * If we are to do a background check: 240 * Get the mount point information of the filesystem 241 * create snapshot file 242 * return created snapshot file 243 * if not found, clear bkgrdflag and proceed with normal fsck 244 */ 245 if (bkgrdflag) { 246 if (mntp == NULL) { 247 bkgrdflag = 0; 248 pfatal("NOT MOUNTED, CANNOT RUN IN BACKGROUND\n"); 249 } else if ((mntp->f_flags & MNT_SOFTDEP) == 0) { 250 bkgrdflag = 0; 251 pfatal("NOT USING SOFT UPDATES, %s\n", 252 "CANNOT RUN IN BACKGROUND"); 253 } else if ((mntp->f_flags & MNT_RDONLY) != 0) { 254 bkgrdflag = 0; 255 pfatal("MOUNTED READ-ONLY, CANNOT RUN IN BACKGROUND\n"); 256 } else if ((fsreadfd = open(filesys, O_RDONLY)) >= 0) { 257 if (readsb(0) != 0) { 258 if (sblock.fs_flags & FS_NEEDSFSCK) { 259 bkgrdflag = 0; 260 pfatal("UNEXPECTED INCONSISTENCY, %s\n", 261 "CANNOT RUN IN BACKGROUND\n"); 262 } 263 if ((sblock.fs_flags & FS_UNCLEAN) == 0 && 264 skipclean && preen) { 265 /* 266 * filesystem is clean; 267 * skip snapshot and report it clean 268 */ 269 pwarn("FILESYSTEM CLEAN; %s\n", 270 "SKIPPING CHECKS"); 271 goto clean; 272 } 273 } 274 close(fsreadfd); 275 } 276 if (bkgrdflag) { 277 snprintf(snapname, sizeof snapname, "%s/.fsck_snapshot", 278 mntp->f_mntonname); 279 args.fspec = snapname; 280 while (mount("ffs", mntp->f_mntonname, 281 mntp->f_flags | MNT_UPDATE | MNT_SNAPSHOT, 282 &args) < 0) { 283 if (errno == EEXIST && unlink(snapname) == 0) 284 continue; 285 bkgrdflag = 0; 286 pfatal("CANNOT CREATE SNAPSHOT %s: %s\n", 287 snapname, strerror(errno)); 288 break; 289 } 290 if (bkgrdflag != 0) 291 filesys = snapname; 292 } 293 } 294 295 switch (setup(filesys)) { 296 case 0: 297 if (preen) 298 pfatal("CAN'T CHECK FILE SYSTEM."); 299 return (0); 300 case -1: 301 clean: 302 pwarn("clean, %ld free ", sblock.fs_cstotal.cs_nffree + 303 sblock.fs_frag * sblock.fs_cstotal.cs_nbfree); 304 printf("(%d frags, %d blocks, %.1f%% fragmentation)\n", 305 sblock.fs_cstotal.cs_nffree, sblock.fs_cstotal.cs_nbfree, 306 sblock.fs_cstotal.cs_nffree * 100.0 / sblock.fs_dsize); 307 return (0); 308 } 309 310 /* 311 * Cleared if any questions answered no. Used to decide if 312 * the superblock should be marked clean. 313 */ 314 resolved = 1; 315 /* 316 * 1: scan inodes tallying blocks used 317 */ 318 if (preen == 0) { 319 printf("** Last Mounted on %s\n", sblock.fs_fsmnt); 320 if (mntp != NULL && mntp->f_flags & MNT_ROOTFS) 321 printf("** Root file system\n"); 322 printf("** Phase 1 - Check Blocks and Sizes\n"); 323 } 324 pass1(); 325 326 /* 327 * 1b: locate first references to duplicates, if any 328 */ 329 if (duplist) { 330 if (preen || usedsoftdep) 331 pfatal("INTERNAL ERROR: dups with -p"); 332 printf("** Phase 1b - Rescan For More DUPS\n"); 333 pass1b(); 334 } 335 336 /* 337 * 2: traverse directories from root to mark all connected directories 338 */ 339 if (preen == 0) 340 printf("** Phase 2 - Check Pathnames\n"); 341 pass2(); 342 343 /* 344 * 3: scan inodes looking for disconnected directories 345 */ 346 if (preen == 0) 347 printf("** Phase 3 - Check Connectivity\n"); 348 pass3(); 349 350 /* 351 * 4: scan inodes looking for disconnected files; check reference counts 352 */ 353 if (preen == 0) 354 printf("** Phase 4 - Check Reference Counts\n"); 355 pass4(); 356 357 /* 358 * 5: check and repair resource counts in cylinder groups 359 */ 360 if (preen == 0) 361 printf("** Phase 5 - Check Cyl groups\n"); 362 pass5(); 363 364 /* 365 * print out summary statistics 366 */ 367 n_ffree = sblock.fs_cstotal.cs_nffree; 368 n_bfree = sblock.fs_cstotal.cs_nbfree; 369 files = maxino - ROOTINO - sblock.fs_cstotal.cs_nifree - n_files; 370 blks = n_blks + 371 sblock.fs_ncg * (cgdmin(&sblock, 0) - cgsblock(&sblock, 0)); 372 blks += cgsblock(&sblock, 0) - cgbase(&sblock, 0); 373 blks += howmany(sblock.fs_cssize, sblock.fs_fsize); 374 blks = maxfsblock - (n_ffree + sblock.fs_frag * n_bfree) - blks; 375 if (bkgrdflag && (files > 0 || blks > 0)) { 376 countdirs = sblock.fs_cstotal.cs_ndir - countdirs; 377 pwarn("Reclaimed: %d directories, %d files, %d fragments\n", 378 countdirs, files - countdirs, blks); 379 } 380 pwarn("%ld files, %ld used, %ld free ", 381 n_files, n_blks, n_ffree + sblock.fs_frag * n_bfree); 382 printf("(%d frags, %d blocks, %.1f%% fragmentation)\n", 383 n_ffree, n_bfree, n_ffree * 100.0 / sblock.fs_dsize); 384 if (debug) { 385 if (files < 0) 386 printf("%d inodes missing\n", -files); 387 if (blks < 0) 388 printf("%d blocks missing\n", -blks); 389 if (duplist != NULL) { 390 printf("The following duplicate blocks remain:"); 391 for (dp = duplist; dp; dp = dp->next) 392 printf(" %d,", dp->dup); 393 printf("\n"); 394 } 395 if (zlnhead != NULL) { 396 printf("The following zero link count inodes remain:"); 397 for (zlnp = zlnhead; zlnp; zlnp = zlnp->next) 398 printf(" %u,", zlnp->zlncnt); 399 printf("\n"); 400 } 401 } 402 zlnhead = (struct zlncnt *)0; 403 duplist = (struct dups *)0; 404 muldup = (struct dups *)0; 405 inocleanup(); 406 if (fsmodified) { 407 sblock.fs_time = time(NULL); 408 sbdirty(); 409 } 410 if (cvtlevel && sblk.b_dirty) { 411 /* 412 * Write out the duplicate super blocks 413 */ 414 for (cylno = 0; cylno < sblock.fs_ncg; cylno++) 415 bwrite(fswritefd, (char *)&sblock, 416 fsbtodb(&sblock, cgsblock(&sblock, cylno)), SBSIZE); 417 } 418 if (rerun) 419 resolved = 0; 420 421 /* 422 * Check to see if the filesystem is mounted read-write. 423 */ 424 if (bkgrdflag == 0 && mntp != NULL && (mntp->f_flags & MNT_RDONLY) == 0) 425 resolved = 0; 426 ckfini(resolved); 427 428 for (cylno = 0; cylno < sblock.fs_ncg; cylno++) 429 if (inostathead[cylno].il_stat != NULL) 430 free((char *)inostathead[cylno].il_stat); 431 free((char *)inostathead); 432 inostathead = NULL; 433 if (fsmodified && !preen) 434 printf("\n***** FILE SYSTEM WAS MODIFIED *****\n"); 435 if (rerun) 436 printf("\n***** PLEASE RERUN FSCK *****\n"); 437 if (mntp != NULL) { 438 struct ufs_args args; 439 int ret; 440 /* 441 * We modified a mounted filesystem. Do a mount update on 442 * it unless it is read-write, so we can continue using it 443 * as safely as possible. 444 */ 445 if (mntp->f_flags & MNT_RDONLY) { 446 args.fspec = 0; 447 args.export.ex_flags = 0; 448 args.export.ex_root = 0; 449 ret = mount("ufs", mntp->f_mntonname, 450 mntp->f_flags | MNT_UPDATE | MNT_RELOAD, &args); 451 if (ret == 0) 452 return (0); 453 pwarn("mount reload of '%s' failed: %s\n\n", 454 mntp->f_mntonname, strerror(errno)); 455 } 456 if (!fsmodified) 457 return (0); 458 if (!preen) 459 printf("\n***** REBOOT NOW *****\n"); 460 sync(); 461 return (4); 462 } 463 return (0); 464 } 465 466 /* 467 * Get the mount point information for name. 468 */ 469 static struct statfs * 470 getmntpt(name) 471 const char *name; 472 { 473 struct stat devstat, mntdevstat; 474 char device[sizeof(_PATH_DEV) - 1 + MNAMELEN]; 475 char *devname; 476 struct statfs *mntbuf, *statfsp; 477 int i, mntsize, isdev; 478 479 if (stat(name, &devstat) != 0) 480 return (NULL); 481 if (S_ISCHR(devstat.st_mode) || S_ISBLK(devstat.st_mode)) 482 isdev = 1; 483 else 484 isdev = 0; 485 mntsize = getmntinfo(&mntbuf, MNT_NOWAIT); 486 for (i = 0; i < mntsize; i++) { 487 statfsp = &mntbuf[i]; 488 devname = statfsp->f_mntfromname; 489 if (*devname != '/') { 490 strcpy(device, _PATH_DEV); 491 strcat(device, devname); 492 strcpy(statfsp->f_mntfromname, device); 493 } 494 if (isdev == 0) { 495 if (strcmp(name, statfsp->f_mntonname)) 496 continue; 497 return (statfsp); 498 } 499 if (stat(devname, &mntdevstat) == 0 && 500 mntdevstat.st_rdev == devstat.st_rdev) 501 return (statfsp); 502 } 503 statfsp = NULL; 504 return (statfsp); 505 } 506 507 static void 508 usage() 509 { 510 extern char *__progname; 511 512 (void) fprintf(stderr, 513 "Usage: %s [-BFpfny] [-b block] [-c level] [-m mode] " 514 "filesystem ...\n", 515 __progname); 516 exit(1); 517 } 518