1 /* $NetBSD: main.c,v 1.75 2010/01/07 01:39:56 christos Exp $ */ 2 3 /* 4 * Copyright (c) 1980, 1986, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. Neither the name of the University nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 32 #include <sys/cdefs.h> 33 #ifndef lint 34 __COPYRIGHT("@(#) Copyright (c) 1980, 1986, 1993\ 35 The Regents of the University of California. All rights reserved."); 36 #endif /* not lint */ 37 38 #ifndef lint 39 #if 0 40 static char sccsid[] = "@(#)main.c 8.6 (Berkeley) 5/14/95"; 41 #else 42 __RCSID("$NetBSD: main.c,v 1.75 2010/01/07 01:39:56 christos Exp $"); 43 #endif 44 #endif /* not lint */ 45 46 #include <sys/param.h> 47 #include <sys/time.h> 48 #include <sys/mount.h> 49 #include <sys/resource.h> 50 51 #include <ufs/ufs/dinode.h> 52 #include <ufs/ufs/ufsmount.h> 53 #include <ufs/ffs/fs.h> 54 #include <ufs/ffs/ffs_extern.h> 55 56 #include <ctype.h> 57 #include <err.h> 58 #include <errno.h> 59 #include <fstab.h> 60 #include <string.h> 61 #include <time.h> 62 #include <stdio.h> 63 #include <stdlib.h> 64 #include <unistd.h> 65 #include <signal.h> 66 67 #include "fsck.h" 68 #include "extern.h" 69 #include "fsutil.h" 70 #include "exitvalues.h" 71 #include "snapshot.h" 72 73 int progress = 0; 74 volatile sig_atomic_t returntosingle = 0; 75 76 static int argtoi(int, const char *, const char *, int); 77 static int checkfilesys(const char *, const char *, int); 78 static void usage(void); 79 static char *get_snap_device(char *); 80 81 int 82 main(int argc, char *argv[]) 83 { 84 struct rlimit r; 85 int ch; 86 int ret = FSCK_EXIT_OK; 87 char *snap_backup = NULL; 88 int snap_internal = 0; 89 90 if (getrlimit(RLIMIT_DATA, &r) == 0) { 91 r.rlim_cur = r.rlim_max; 92 (void) setrlimit(RLIMIT_DATA, &r); 93 } 94 sync(); 95 skipclean = 1; 96 markclean = 1; 97 forceimage = 0; 98 endian = 0; 99 isappleufs = 0; 100 while ((ch = getopt(argc, argv, "aB:b:c:dFfm:npPqUyx:X")) != -1) { 101 switch (ch) { 102 case 'a': 103 isappleufs = 1; 104 break; 105 106 case 'B': 107 if (strcmp(optarg, "be") == 0) 108 endian = BIG_ENDIAN; 109 else if (strcmp(optarg, "le") == 0) 110 endian = LITTLE_ENDIAN; 111 else usage(); 112 break; 113 114 case 'b': 115 skipclean = 0; 116 bflag = argtoi('b', "number", optarg, 10); 117 printf("Alternate super block location: %d\n", bflag); 118 break; 119 120 case 'c': 121 skipclean = 0; 122 cvtlevel = argtoi('c', "conversion level", optarg, 10); 123 if (cvtlevel > 4) { 124 cvtlevel = 4; 125 warnx("Using maximum conversion level of %d\n", 126 cvtlevel); 127 } 128 break; 129 130 case 'd': 131 debug++; 132 break; 133 134 case 'F': 135 forceimage = 1; 136 break; 137 138 case 'f': 139 skipclean = 0; 140 break; 141 142 case 'm': 143 lfmode = argtoi('m', "mode", optarg, 8); 144 if (lfmode &~ 07777) 145 errx(FSCK_EXIT_USAGE, "bad mode to -m: %o", 146 lfmode); 147 printf("** lost+found creation mode %o\n", lfmode); 148 break; 149 150 case 'n': 151 nflag++; 152 yflag = 0; 153 break; 154 155 case 'p': 156 preen++; 157 break; 158 159 case 'P': 160 progress = 1; 161 break; 162 163 case 'q': 164 quiet++; 165 break; 166 #ifndef SMALL 167 case 'U': 168 Uflag++; 169 break; 170 #endif 171 172 case 'y': 173 yflag++; 174 nflag = 0; 175 break; 176 case 'x': 177 snap_backup = optarg; 178 break; 179 case 'X': 180 snap_internal = 1; 181 break; 182 183 default: 184 usage(); 185 } 186 } 187 188 if (snap_backup || snap_internal) { 189 if (!nflag || yflag) { 190 warnx("Cannot use -x or -X without -n\n"); 191 snap_backup = NULL; 192 snap_internal = 0; 193 } 194 } 195 196 197 argc -= optind; 198 argv += optind; 199 200 if (!argc) 201 usage(); 202 203 if (debug) 204 progress = 0; 205 206 if (signal(SIGINT, SIG_IGN) != SIG_IGN) 207 (void)signal(SIGINT, catch); 208 if (preen) 209 (void)signal(SIGQUIT, catchquit); 210 #ifdef PROGRESS 211 if (progress) { 212 progress_ttywidth(0); 213 (void)signal(SIGWINCH, progress_ttywidth); 214 } 215 #endif /* ! PROGRESS */ 216 signal(SIGINFO, infohandler); 217 218 while (argc-- > 0) { 219 int nret; 220 char *path = strdup(blockcheck(*argv)); 221 222 if (path == NULL) 223 pfatal("Can't check %s\n", *argv); 224 225 if (snap_backup || snap_internal) { 226 char *mpt; 227 char *snap_dev; 228 int snapfd; 229 230 mpt = get_snap_device(*argv); 231 if (mpt == NULL) 232 goto next; 233 snapfd = snap_open(mpt, snap_backup, NULL, &snap_dev); 234 if (snapfd < 0) { 235 warn("can't take snapshot of %s", mpt); 236 free(mpt); 237 goto next; 238 } 239 nret = checkfilesys(blockcheck(snap_dev), path, 0); 240 if (ret < nret) 241 ret = nret; 242 free(mpt); 243 close(snapfd); 244 } else { 245 nret = checkfilesys(path, path, 0); 246 if (ret < nret) 247 ret = nret; 248 } 249 next: 250 free(path); 251 argv++; 252 } 253 254 return returntosingle ? FSCK_EXIT_UNRESOLVED : ret; 255 } 256 257 static int 258 argtoi(int flag, const char *req, const char *str, int base) 259 { 260 char *cp; 261 int ret; 262 263 ret = (int)strtol(str, &cp, base); 264 if (cp == str || *cp) 265 errx(FSCK_EXIT_USAGE, "-%c flag requires a %s", 266 flag, req); 267 return (ret); 268 } 269 270 /* 271 * Check the specified filesystem. 272 */ 273 /* ARGSUSED */ 274 static int 275 checkfilesys(const char *filesys, const char *origfs, int child) 276 { 277 daddr_t n_ffree, n_bfree; 278 struct dups *dp; 279 struct zlncnt *zlnp; 280 int cylno; 281 #ifdef LITE2BORKEN 282 int flags; 283 #endif 284 #ifdef PROGRESS 285 /* 286 * In prune mode, how far does the progress bar travel during 287 * each pass? (In non-prune mode, each pass has a separate 288 * progress bar that travels from 0 to 100%.) 289 * 290 * The numbers below are percentages, intended to correspond 291 * roughly to the cumulative time up to the end of each pass. 292 * They don't have to be accurate. In reality, on a large 293 * file system, Pass 1 and Pass 2 together are likely to use 294 * significantly more than the 95% reflected below, so users 295 * will get a pleasant surprise when the last 5% of the progress 296 * bar runs more quickly than they had expected. 297 */ 298 static int progress_limits[] = {0, 20, 95, 96, 97, 100}; 299 #endif /* PROGRESS */ 300 301 if (preen && child) 302 (void)signal(SIGQUIT, voidquit); 303 setcdevname(filesys, preen); 304 if (debug && preen) 305 pwarn("starting\n"); 306 switch (setup(filesys, origfs)) { 307 case 0: 308 if (preen) 309 pfatal("CAN'T CHECK FILE SYSTEM."); 310 /* fall through */ 311 case -1: 312 return FSCK_EXIT_OK; 313 } 314 /* 315 * Cleared if any questions answered no. Used to decide if 316 * the superblock should be marked clean. 317 */ 318 resolved = 1; 319 320 #ifdef PROGRESS 321 progress_switch(progress); 322 progress_init(); 323 #endif /* PROGRESS */ 324 325 /* 326 * 1: scan inodes tallying blocks used 327 */ 328 if (preen == 0) { 329 pwarn("** Last Mounted on %s\n", sblock->fs_fsmnt); 330 if (hotroot()) 331 pwarn("** Root file system\n"); 332 pwarn("** Phase 1 - Check Blocks and Sizes\n"); 333 } 334 #ifdef PROGRESS 335 if (preen) 336 progress_setrange(0, progress_limits[1]); 337 #endif /* PROGRESS */ 338 pass1(); 339 340 /* 341 * 1b: locate first references to duplicates, if any 342 */ 343 if (duplist) { 344 if (preen) 345 pfatal("INTERNAL ERROR: dups with -p\n"); 346 if (usedsoftdep) 347 pfatal("INTERNAL ERROR: dups with softdep\n"); 348 pwarn("** Phase 1b - Rescan For More DUPS\n"); 349 pass1b(); 350 } 351 352 /* 353 * 2: traverse directories from root to mark all connected directories 354 */ 355 if (preen == 0) 356 pwarn("** Phase 2 - Check Pathnames\n"); 357 #ifdef PROGRESS 358 if (preen) 359 progress_sethighlim(progress_limits[2]); 360 #endif /* PROGRESS */ 361 pass2(); 362 363 /* 364 * 3: scan inodes looking for disconnected directories 365 */ 366 if (preen == 0) 367 pwarn("** Phase 3 - Check Connectivity\n"); 368 #ifdef PROGRESS 369 if (preen) 370 progress_sethighlim(progress_limits[3]); 371 #endif /* PROGRESS */ 372 pass3(); 373 374 /* 375 * 4: scan inodes looking for disconnected files; check reference counts 376 */ 377 if (preen == 0) 378 pwarn("** Phase 4 - Check Reference Counts\n"); 379 #ifdef PROGRESS 380 if (preen) 381 progress_sethighlim(progress_limits[4]); 382 #endif /* PROGRESS */ 383 pass4(); 384 385 /* 386 * 5: check and repair resource counts in cylinder groups 387 */ 388 if (preen == 0) 389 pwarn("** Phase 5 - Check Cyl groups\n"); 390 #ifdef PROGRESS 391 if (preen) 392 progress_sethighlim(progress_limits[5]); 393 #endif /* PROGRESS */ 394 pass5(); 395 396 /* 397 * print out summary statistics 398 */ 399 n_ffree = sblock->fs_cstotal.cs_nffree; 400 n_bfree = sblock->fs_cstotal.cs_nbfree; 401 pwarn("%llu files, %lld used, %lld free ", 402 (unsigned long long)n_files, (long long)n_blks, 403 (long long)(n_ffree + sblock->fs_frag * n_bfree)); 404 printf("(%lld frags, %lld blocks, %lld.%lld%% fragmentation)\n", 405 (long long)n_ffree, (long long)n_bfree, 406 (long long)(n_ffree * 100 / (daddr_t)sblock->fs_dsize), 407 (long long)(((n_ffree * 1000 + (daddr_t)sblock->fs_dsize / 2) 408 / (daddr_t)sblock->fs_dsize) % 10)); 409 if (debug && 410 (n_files -= maxino - ROOTINO - sblock->fs_cstotal.cs_nifree)) 411 printf("%llu files missing\n", (unsigned long long)n_files); 412 if (debug) { 413 n_blks += sblock->fs_ncg * 414 (cgdmin(sblock, 0) - cgsblock(sblock, 0)); 415 n_blks += cgsblock(sblock, 0) - cgbase(sblock, 0); 416 n_blks += howmany(sblock->fs_cssize, sblock->fs_fsize); 417 if (n_blks -= maxfsblock - (n_ffree + sblock->fs_frag * n_bfree)) 418 printf("%lld blocks missing\n", (long long)n_blks); 419 if (duplist != NULL) { 420 printf("The following duplicate blocks remain:"); 421 for (dp = duplist; dp; dp = dp->next) 422 printf(" %lld,", (long long)dp->dup); 423 printf("\n"); 424 } 425 if (zlnhead != NULL) { 426 printf("The following zero link count inodes remain:"); 427 for (zlnp = zlnhead; zlnp; zlnp = zlnp->next) 428 printf(" %llu,", 429 (unsigned long long)zlnp->zlncnt); 430 printf("\n"); 431 } 432 } 433 zlnhead = (struct zlncnt *)0; 434 duplist = (struct dups *)0; 435 muldup = (struct dups *)0; 436 inocleanup(); 437 if (fsmodified) { 438 sblock->fs_time = time(NULL); 439 sbdirty(); 440 } 441 if (rerun) 442 markclean = 0; 443 #if LITE2BORKEN 444 if (!hotroot()) { 445 ckfini(); 446 } else { 447 struct statvfs stfs_buf; 448 /* 449 * Check to see if root is mounted read-write. 450 */ 451 if (statvfs("/", &stfs_buf) == 0) 452 flags = stfs_buf.f_flag; 453 else 454 flags = 0; 455 if (markclean) 456 markclean = flags & MNT_RDONLY; 457 ckfini(); 458 } 459 #else 460 ckfini(); 461 #endif 462 for (cylno = 0; cylno < sblock->fs_ncg; cylno++) 463 if (inostathead[cylno].il_stat != NULL) 464 free(inostathead[cylno].il_stat); 465 free(inostathead); 466 inostathead = NULL; 467 468 if (!resolved || rerun) { 469 pwarn("\n***** UNRESOLVED INCONSISTENCIES REMAIN *****\n"); 470 returntosingle = 1; 471 } 472 if (!fsmodified) 473 return FSCK_EXIT_OK; 474 if (!preen) 475 pwarn("\n***** FILE SYSTEM WAS MODIFIED *****\n"); 476 if (rerun) 477 pwarn("\n***** PLEASE RERUN FSCK *****\n"); 478 if (hotroot()) { 479 struct statvfs stfs_buf; 480 /* 481 * We modified the root. Do a mount update on 482 * it, unless it is read-write, so we can continue. 483 */ 484 if (statvfs("/", &stfs_buf) == 0) { 485 long flags = stfs_buf.f_flag; 486 struct ufs_args args; 487 488 if (flags & MNT_RDONLY) { 489 args.fspec = 0; 490 flags |= MNT_UPDATE | MNT_RELOAD; 491 if (mount(MOUNT_FFS, "/", flags, 492 &args, sizeof args) == 0) 493 return FSCK_EXIT_OK; 494 } 495 } 496 if (!preen) 497 pwarn("\n***** REBOOT NOW *****\n"); 498 sync(); 499 return FSCK_EXIT_ROOT_CHANGED; 500 } 501 return FSCK_EXIT_OK; 502 } 503 504 static void 505 usage(void) 506 { 507 508 (void) fprintf(stderr, 509 "usage: %s [-adFfPpqUX] [-B byteorder] [-b block] [-c level] " 510 "[-m mode]\n" 511 "\t[-x snap-backup] [-y | -n] filesystem ...\n", 512 getprogname()); 513 exit(FSCK_EXIT_USAGE); 514 } 515 516 static 517 char *get_snap_device(char *file) 518 { 519 char *mountpoint = NULL; 520 struct statvfs *mntbuf, *fs, fsbuf; 521 struct stat sb; 522 523 /* find the mount point */ 524 if (lstat(file, &sb) == -1) { 525 warn("can't stat %s", file); 526 return NULL; 527 } 528 if (S_ISCHR(sb.st_mode) || S_ISBLK(sb.st_mode)) { 529 int mntbufc, i; 530 if ((mntbufc = getmntinfo(&mntbuf, MNT_NOWAIT)) == 0) 531 pfatal("can't get mount list: %s\n", strerror(errno)); 532 for (fs = mntbuf, i = 0; 533 i < mntbufc; i++, fs++) { 534 if (strcmp(fs->f_fstypename, "ufs") != 0 && 535 strcmp(fs->f_fstypename, "ffs") != 0) 536 continue; 537 if (fs->f_flag & ST_RDONLY) { 538 warnx("Cannot use -x or -X " 539 "on read-only filesystem"); 540 free(mntbuf); 541 return NULL; 542 } 543 if (strcmp(fs->f_mntfromname, unrawname(file)) == 0) { 544 mountpoint = strdup(fs->f_mntonname); 545 free(mntbuf); 546 return mountpoint; 547 } 548 } 549 warnx("Cannot use -x or -X on unmounted device"); 550 free(mntbuf); 551 return NULL; 552 } 553 if (S_ISDIR(sb.st_mode)) { 554 if (statvfs(file, &fsbuf) == -1) 555 pfatal("can't statvfs %s: %s\n", file, strerror(errno)); 556 if (strcmp(fsbuf.f_mntonname, file)) 557 pfatal("%s is not a mount point\n", file); 558 if (fsbuf.f_flag & ST_RDONLY) { 559 warnx("Cannot use -x or -X " 560 "on read-only filesystem"); 561 return NULL; 562 } 563 mountpoint = strdup(file); 564 return mountpoint; 565 } 566 pfatal("%s is not a mount point\n", file); 567 return NULL; 568 } 569