main.c revision 178088
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 * 4. Neither the name of the University nor the names of its contributors 14 * may be used to endorse or promote products derived from this software 15 * without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 */ 29 30#if 0 31#ifndef lint 32static const char copyright[] = 33"@(#) Copyright (c) 1980, 1986, 1993\n\ 34 The Regents of the University of California. All rights reserved.\n"; 35#endif /* not lint */ 36 37#ifndef lint 38static char sccsid[] = "@(#)main.c 8.6 (Berkeley) 5/14/95"; 39#endif /* not lint */ 40#endif 41#include <sys/cdefs.h> 42__FBSDID("$FreeBSD: head/sbin/fsck_ffs/main.c 178088 2008-04-10 23:49:23Z delphij $"); 43 44#include <sys/param.h> 45#include <sys/stat.h> 46#include <sys/file.h> 47#include <sys/time.h> 48#include <sys/mount.h> 49#include <sys/resource.h> 50#include <sys/sysctl.h> 51#include <sys/uio.h> 52#include <sys/disklabel.h> 53 54#include <ufs/ufs/dinode.h> 55#include <ufs/ffs/fs.h> 56 57#include <err.h> 58#include <errno.h> 59#include <fstab.h> 60#include <grp.h> 61#include <mntopts.h> 62#include <paths.h> 63#include <stdint.h> 64#include <string.h> 65 66#include "fsck.h" 67 68static void usage(void) __dead2; 69static int argtoi(int flag, const char *req, const char *str, int base); 70static int checkfilesys(char *filesys); 71static int chkdoreload(struct statfs *mntp); 72static struct statfs *getmntpt(const char *); 73 74int 75main(int argc, char *argv[]) 76{ 77 int ch; 78 struct rlimit rlimit; 79 struct itimerval itimerval; 80 int ret = 0; 81 82 sync(); 83 skipclean = 1; 84 catastrophicflag = 0; 85 while ((ch = getopt(argc, argv, "b:Bc:CdfFm: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 if (cvtlevel < 3) 101 errx(EEXIT, "cannot do level %d conversion", 102 cvtlevel); 103 break; 104 105 case 'd': 106 debug++; 107 break; 108 109 case 'C': 110 catastrophicflag = 1; 111 /* FALLTHROUGH */ 112 113 case 'f': 114 skipclean = 0; 115 break; 116 117 case 'F': 118 bkgrdcheck = 1; 119 break; 120 121 case 'm': 122 lfmode = argtoi('m', "mode", optarg, 8); 123 if (lfmode &~ 07777) 124 errx(EEXIT, "bad mode to -m: %o", lfmode); 125 printf("** lost+found creation mode %o\n", lfmode); 126 break; 127 128 case 'n': 129 nflag++; 130 yflag = 0; 131 break; 132 133 case 'p': 134 preen++; 135 break; 136 137 case 'y': 138 yflag++; 139 nflag = 0; 140 break; 141 142 default: 143 usage(); 144 } 145 } 146 argc -= optind; 147 argv += optind; 148 149 if (!argc) 150 usage(); 151 152 if (signal(SIGINT, SIG_IGN) != SIG_IGN) 153 (void)signal(SIGINT, catch); 154 if (preen) 155 (void)signal(SIGQUIT, catchquit); 156 signal(SIGINFO, infohandler); 157 if (bkgrdflag) { 158 signal(SIGALRM, alarmhandler); 159 itimerval.it_interval.tv_sec = 5; 160 itimerval.it_interval.tv_usec = 0; 161 itimerval.it_value.tv_sec = 5; 162 itimerval.it_value.tv_usec = 0; 163 setitimer(ITIMER_REAL, &itimerval, NULL); 164 } 165 /* 166 * Push up our allowed memory limit so we can cope 167 * with huge file systems. 168 */ 169 if (getrlimit(RLIMIT_DATA, &rlimit) == 0) { 170 rlimit.rlim_cur = rlimit.rlim_max; 171 (void)setrlimit(RLIMIT_DATA, &rlimit); 172 } 173 while (argc-- > 0) 174 (void)checkfilesys(*argv++); 175 176 if (returntosingle) 177 ret = 2; 178 exit(ret); 179} 180 181static int 182argtoi(int flag, const char *req, const char *str, int base) 183{ 184 char *cp; 185 int ret; 186 187 ret = (int)strtol(str, &cp, base); 188 if (cp == str || *cp) 189 errx(EEXIT, "-%c flag requires a %s", flag, req); 190 return (ret); 191} 192 193/* 194 * Check the specified file system. 195 */ 196/* ARGSUSED */ 197static int 198checkfilesys(char *filesys) 199{ 200 ufs2_daddr_t n_ffree, n_bfree; 201 struct dups *dp; 202 struct statfs *mntp; 203 struct stat snapdir; 204 struct group *grp; 205 ufs2_daddr_t blks; 206 struct iovec *iov; 207 char errmsg[255]; 208 int iovlen; 209 int fflags; 210 int cylno; 211 ino_t files; 212 size_t size; 213 214 iov = NULL; 215 iovlen = 0; 216 errmsg[0] = '\0'; 217 218 cdevname = filesys; 219 if (debug && preen) 220 pwarn("starting\n"); 221 /* 222 * Make best effort to get the disk name. Check first to see 223 * if it is listed among the mounted file systems. Failing that 224 * check to see if it is listed in /etc/fstab. 225 */ 226 mntp = getmntpt(filesys); 227 if (mntp != NULL) 228 filesys = mntp->f_mntfromname; 229 else 230 filesys = blockcheck(filesys); 231 /* 232 * If -F flag specified, check to see whether a background check 233 * is possible and needed. If possible and needed, exit with 234 * status zero. Otherwise exit with status non-zero. A non-zero 235 * exit status will cause a foreground check to be run. 236 */ 237 sblock_init(); 238 if (bkgrdcheck) { 239 if ((fsreadfd = open(filesys, O_RDONLY)) < 0 || readsb(0) == 0) 240 exit(3); /* Cannot read superblock */ 241 close(fsreadfd); 242 if (sblock.fs_flags & FS_NEEDSFSCK) 243 exit(4); /* Earlier background failed */ 244 if ((sblock.fs_flags & FS_DOSOFTDEP) == 0) 245 exit(5); /* Not running soft updates */ 246 size = MIBSIZE; 247 if (sysctlnametomib("vfs.ffs.adjrefcnt", adjrefcnt, &size) < 0) 248 exit(6); /* Lacks kernel support */ 249 if ((mntp == NULL && sblock.fs_clean == 1) || 250 (mntp != NULL && (sblock.fs_flags & FS_UNCLEAN) == 0)) 251 exit(7); /* Filesystem clean, report it now */ 252 exit(0); 253 } 254 if (preen && skipclean) { 255 /* 256 * If file system is gjournaled, check it here. 257 */ 258 if ((fsreadfd = open(filesys, O_RDONLY)) < 0 || readsb(0) == 0) 259 exit(3); /* Cannot read superblock */ 260 close(fsreadfd); 261 if ((sblock.fs_flags & FS_GJOURNAL) != 0) { 262 //printf("GJournaled file system detected on %s.\n", 263 // filesys); 264 if (sblock.fs_clean == 1) { 265 pwarn("FILE SYSTEM CLEAN; SKIPPING CHECKS\n"); 266 exit(0); 267 } 268 if ((sblock.fs_flags & (FS_UNCLEAN | FS_NEEDSFSCK)) == 0) { 269 gjournal_check(filesys); 270 if (chkdoreload(mntp) == 0) 271 exit(0); 272 exit(4); 273 } else { 274 pfatal("UNEXPECTED INCONSISTENCY, %s\n", 275 "CANNOT RUN FAST FSCK\n"); 276 } 277 } 278 } 279 /* 280 * If we are to do a background check: 281 * Get the mount point information of the file system 282 * create snapshot file 283 * return created snapshot file 284 * if not found, clear bkgrdflag and proceed with normal fsck 285 */ 286 if (bkgrdflag) { 287 if (mntp == NULL) { 288 bkgrdflag = 0; 289 pfatal("NOT MOUNTED, CANNOT RUN IN BACKGROUND\n"); 290 } else if ((mntp->f_flags & MNT_SOFTDEP) == 0) { 291 bkgrdflag = 0; 292 pfatal("NOT USING SOFT UPDATES, %s\n", 293 "CANNOT RUN IN BACKGROUND"); 294 } else if ((mntp->f_flags & MNT_RDONLY) != 0) { 295 bkgrdflag = 0; 296 pfatal("MOUNTED READ-ONLY, CANNOT RUN IN BACKGROUND\n"); 297 } else if ((fsreadfd = open(filesys, O_RDONLY)) >= 0) { 298 if (readsb(0) != 0) { 299 if (sblock.fs_flags & FS_NEEDSFSCK) { 300 bkgrdflag = 0; 301 pfatal("UNEXPECTED INCONSISTENCY, %s\n", 302 "CANNOT RUN IN BACKGROUND\n"); 303 } 304 if ((sblock.fs_flags & FS_UNCLEAN) == 0 && 305 skipclean && preen) { 306 /* 307 * file system is clean; 308 * skip snapshot and report it clean 309 */ 310 pwarn("FILE SYSTEM CLEAN; %s\n", 311 "SKIPPING CHECKS"); 312 goto clean; 313 } 314 } 315 close(fsreadfd); 316 } 317 if (bkgrdflag) { 318 snprintf(snapname, sizeof snapname, "%s/.snap", 319 mntp->f_mntonname); 320 if (stat(snapname, &snapdir) < 0) { 321 if (errno != ENOENT) { 322 bkgrdflag = 0; 323 pfatal("CANNOT FIND %s %s: %s, %s\n", 324 "SNAPSHOT DIRECTORY", 325 snapname, strerror(errno), 326 "CANNOT RUN IN BACKGROUND"); 327 } else if ((grp = getgrnam("operator")) == 0 || 328 mkdir(snapname, 0770) < 0 || 329 chown(snapname, -1, grp->gr_gid) < 0 || 330 chmod(snapname, 0770) < 0) { 331 bkgrdflag = 0; 332 pfatal("CANNOT CREATE %s %s: %s, %s\n", 333 "SNAPSHOT DIRECTORY", 334 snapname, strerror(errno), 335 "CANNOT RUN IN BACKGROUND"); 336 } 337 } else if (!S_ISDIR(snapdir.st_mode)) { 338 bkgrdflag = 0; 339 pfatal("%s IS NOT A DIRECTORY, %s\n", snapname, 340 "CANNOT RUN IN BACKGROUND"); 341 } 342 } 343 if (bkgrdflag) { 344 snprintf(snapname, sizeof snapname, 345 "%s/.snap/fsck_snapshot", mntp->f_mntonname); 346 fflags = mntp->f_flags; 347 fflags = fflags | MNT_UPDATE | MNT_SNAPSHOT; 348 build_iovec(&iov, &iovlen, "fstype", "ffs", 4); 349 build_iovec(&iov, &iovlen, "from", snapname, 350 (size_t)-1); 351 build_iovec(&iov, &iovlen, "fspath", mntp->f_mntonname, 352 (size_t)-1); 353 build_iovec(&iov, &iovlen, "errmsg", errmsg, 354 sizeof(errmsg)); 355 356 while (nmount(iov, iovlen, fflags) < 0) { 357 if (errno == EEXIST && unlink(snapname) == 0) 358 continue; 359 bkgrdflag = 0; 360 pfatal("CANNOT CREATE SNAPSHOT %s: %s %s\n", 361 snapname, strerror(errno), errmsg); 362 break; 363 } 364 if (bkgrdflag != 0) 365 filesys = snapname; 366 } 367 } 368 369 switch (setup(filesys)) { 370 case 0: 371 if (preen) 372 pfatal("CAN'T CHECK FILE SYSTEM."); 373 return (0); 374 case -1: 375 clean: 376 pwarn("clean, %ld free ", (long)(sblock.fs_cstotal.cs_nffree + 377 sblock.fs_frag * sblock.fs_cstotal.cs_nbfree)); 378 printf("(%lld frags, %lld blocks, %.1f%% fragmentation)\n", 379 (long long)sblock.fs_cstotal.cs_nffree, 380 (long long)sblock.fs_cstotal.cs_nbfree, 381 sblock.fs_cstotal.cs_nffree * 100.0 / sblock.fs_dsize); 382 return (0); 383 } 384 385 /* 386 * Cleared if any questions answered no. Used to decide if 387 * the superblock should be marked clean. 388 */ 389 resolved = 1; 390 /* 391 * 1: scan inodes tallying blocks used 392 */ 393 if (preen == 0) { 394 printf("** Last Mounted on %s\n", sblock.fs_fsmnt); 395 if (mntp != NULL && mntp->f_flags & MNT_ROOTFS) 396 printf("** Root file system\n"); 397 printf("** Phase 1 - Check Blocks and Sizes\n"); 398 } 399 pass1(); 400 401 /* 402 * 1b: locate first references to duplicates, if any 403 */ 404 if (duplist) { 405 if (preen || usedsoftdep) 406 pfatal("INTERNAL ERROR: dups with -p"); 407 printf("** Phase 1b - Rescan For More DUPS\n"); 408 pass1b(); 409 } 410 411 /* 412 * 2: traverse directories from root to mark all connected directories 413 */ 414 if (preen == 0) 415 printf("** Phase 2 - Check Pathnames\n"); 416 pass2(); 417 418 /* 419 * 3: scan inodes looking for disconnected directories 420 */ 421 if (preen == 0) 422 printf("** Phase 3 - Check Connectivity\n"); 423 pass3(); 424 425 /* 426 * 4: scan inodes looking for disconnected files; check reference counts 427 */ 428 if (preen == 0) 429 printf("** Phase 4 - Check Reference Counts\n"); 430 pass4(); 431 432 /* 433 * 5: check and repair resource counts in cylinder groups 434 */ 435 if (preen == 0) 436 printf("** Phase 5 - Check Cyl groups\n"); 437 pass5(); 438 439 /* 440 * print out summary statistics 441 */ 442 n_ffree = sblock.fs_cstotal.cs_nffree; 443 n_bfree = sblock.fs_cstotal.cs_nbfree; 444 files = maxino - ROOTINO - sblock.fs_cstotal.cs_nifree - n_files; 445 blks = n_blks + 446 sblock.fs_ncg * (cgdmin(&sblock, 0) - cgsblock(&sblock, 0)); 447 blks += cgsblock(&sblock, 0) - cgbase(&sblock, 0); 448 blks += howmany(sblock.fs_cssize, sblock.fs_fsize); 449 blks = maxfsblock - (n_ffree + sblock.fs_frag * n_bfree) - blks; 450 if (bkgrdflag && (files > 0 || blks > 0)) { 451 countdirs = sblock.fs_cstotal.cs_ndir - countdirs; 452 pwarn("Reclaimed: %ld directories, %ld files, %lld fragments\n", 453 countdirs, (long)files - countdirs, (long long)blks); 454 } 455 pwarn("%ld files, %jd used, %ju free ", 456 (long)n_files, (intmax_t)n_blks, 457 (uintmax_t)n_ffree + sblock.fs_frag * n_bfree); 458 printf("(%ju frags, %ju blocks, %.1f%% fragmentation)\n", 459 (uintmax_t)n_ffree, (uintmax_t)n_bfree, 460 n_ffree * 100.0 / sblock.fs_dsize); 461 if (debug) { 462 if (files < 0) 463 printf("%d inodes missing\n", -files); 464 if (blks < 0) 465 printf("%lld blocks missing\n", -(long long)blks); 466 if (duplist != NULL) { 467 printf("The following duplicate blocks remain:"); 468 for (dp = duplist; dp; dp = dp->next) 469 printf(" %lld,", (long long)dp->dup); 470 printf("\n"); 471 } 472 } 473 duplist = (struct dups *)0; 474 muldup = (struct dups *)0; 475 inocleanup(); 476 if (fsmodified) { 477 sblock.fs_time = time(NULL); 478 sbdirty(); 479 } 480 if (cvtlevel && sblk.b_dirty) { 481 /* 482 * Write out the duplicate super blocks 483 */ 484 for (cylno = 0; cylno < sblock.fs_ncg; cylno++) 485 blwrite(fswritefd, (char *)&sblock, 486 fsbtodb(&sblock, cgsblock(&sblock, cylno)), 487 SBLOCKSIZE); 488 } 489 if (rerun) 490 resolved = 0; 491 492 /* 493 * Check to see if the file system is mounted read-write. 494 */ 495 if (bkgrdflag == 0 && mntp != NULL && (mntp->f_flags & MNT_RDONLY) == 0) 496 resolved = 0; 497 ckfini(resolved); 498 499 for (cylno = 0; cylno < sblock.fs_ncg; cylno++) 500 if (inostathead[cylno].il_stat != NULL) 501 free((char *)inostathead[cylno].il_stat); 502 free((char *)inostathead); 503 inostathead = NULL; 504 if (fsmodified && !preen) 505 printf("\n***** FILE SYSTEM WAS MODIFIED *****\n"); 506 if (rerun) 507 printf("\n***** PLEASE RERUN FSCK *****\n"); 508 if (chkdoreload(mntp) != 0) { 509 if (!fsmodified) 510 return (0); 511 if (!preen) 512 printf("\n***** REBOOT NOW *****\n"); 513 sync(); 514 return (4); 515 } 516 return (0); 517} 518 519static int 520chkdoreload(struct statfs *mntp) 521{ 522 struct iovec *iov; 523 int iovlen; 524 int fflags; 525 char errmsg[255]; 526 527 if (mntp == NULL) 528 return (0); 529 530 iov = NULL; 531 iovlen = 0; 532 errmsg[0] = '\0'; 533 fflags = mntp->f_flags; 534 /* 535 * We modified a mounted file system. Do a mount update on 536 * it unless it is read-write, so we can continue using it 537 * as safely as possible. 538 */ 539 if (mntp->f_flags & MNT_RDONLY) { 540 fflags = fflags | MNT_RELOAD; 541 build_iovec(&iov, &iovlen, "fstype", "ffs", 4); 542 build_iovec(&iov, &iovlen, "from", mntp->f_mntfromname, 543 (size_t)-1); 544 build_iovec(&iov, &iovlen, "fspath", mntp->f_mntonname, 545 (size_t)-1); 546 build_iovec(&iov, &iovlen, "errmsg", errmsg, 547 sizeof(errmsg)); 548 build_iovec(&iov, &iovlen, "update", NULL, 0); 549 /* 550 * XX: We need the following line until we clean up 551 * nmount parsing of root mounts and NFS root mounts. 552 */ 553 build_iovec(&iov, &iovlen, "ro", NULL, 0); 554 if (nmount(iov, iovlen, fflags) == 0) { 555 return (0); 556 } 557 pwarn("mount reload of '%s' failed: %s %s\n\n", 558 mntp->f_mntonname, strerror(errno), errmsg); 559 return (1); 560 } 561 return (0); 562} 563 564/* 565 * Get the mount point information for name. 566 */ 567static struct statfs * 568getmntpt(const char *name) 569{ 570 struct stat devstat, mntdevstat; 571 char device[sizeof(_PATH_DEV) - 1 + MNAMELEN]; 572 char *ddevname; 573 struct statfs *mntbuf, *statfsp; 574 int i, mntsize, isdev; 575 576 if (stat(name, &devstat) != 0) 577 return (NULL); 578 if (S_ISCHR(devstat.st_mode) || S_ISBLK(devstat.st_mode)) 579 isdev = 1; 580 else 581 isdev = 0; 582 mntsize = getmntinfo(&mntbuf, MNT_NOWAIT); 583 for (i = 0; i < mntsize; i++) { 584 statfsp = &mntbuf[i]; 585 ddevname = statfsp->f_mntfromname; 586 if (*ddevname != '/') { 587 strcpy(device, _PATH_DEV); 588 strcat(device, ddevname); 589 strcpy(statfsp->f_mntfromname, device); 590 } 591 if (isdev == 0) { 592 if (strcmp(name, statfsp->f_mntonname)) 593 continue; 594 return (statfsp); 595 } 596 if (stat(ddevname, &mntdevstat) == 0 && 597 mntdevstat.st_rdev == devstat.st_rdev) 598 return (statfsp); 599 } 600 statfsp = NULL; 601 return (statfsp); 602} 603 604static void 605usage(void) 606{ 607 (void) fprintf(stderr, 608 "usage: %s [-BFpfny] [-b block] [-c level] [-m mode] " 609 "filesystem ...\n", 610 getprogname()); 611 exit(1); 612} 613