1 /*- 2 * SPDX-License-Identifier: BSD-3-Clause 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 #if 0 33 #ifndef lint 34 static const char copyright[] = 35 "@(#) Copyright (c) 1980, 1986, 1993\n\ 36 The Regents of the University of California. All rights reserved.\n"; 37 #endif /* not lint */ 38 39 #ifndef lint 40 static char sccsid[] = "@(#)main.c 8.6 (Berkeley) 5/14/95"; 41 #endif /* not lint */ 42 #endif 43 #include <sys/cdefs.h> 44 __FBSDID("$FreeBSD$"); 45 46 #define IN_RTLD /* So we pickup the P_OSREL defines */ 47 #include <sys/param.h> 48 #include <sys/file.h> 49 #include <sys/mount.h> 50 #include <sys/resource.h> 51 #include <sys/stat.h> 52 #include <sys/sysctl.h> 53 #include <sys/uio.h> 54 #include <sys/disklabel.h> 55 56 #include <ufs/ufs/dinode.h> 57 #include <ufs/ffs/fs.h> 58 59 #include <err.h> 60 #include <errno.h> 61 #include <fstab.h> 62 #include <grp.h> 63 #include <inttypes.h> 64 #include <libufs.h> 65 #include <mntopts.h> 66 #include <paths.h> 67 #include <stdint.h> 68 #include <string.h> 69 #include <time.h> 70 71 #include "fsck.h" 72 73 static int restarts; 74 75 static void usage(void) __dead2; 76 static intmax_t argtoimax(int flag, const char *req, const char *str, int base); 77 static int checkfilesys(char *filesys); 78 static int setup_bkgrdchk(struct statfs *mntp, int sbrdfailed, char **filesys); 79 static int openfilesys(char *dev); 80 static int chkdoreload(struct statfs *mntp); 81 static struct statfs *getmntpt(const char *); 82 83 int 84 main(int argc, char *argv[]) 85 { 86 int ch; 87 struct rlimit rlimit; 88 struct itimerval itimerval; 89 int fsret; 90 int ret = 0; 91 92 sync(); 93 skipclean = 1; 94 inoopt = 0; 95 while ((ch = getopt(argc, argv, "b:Bc:CdEfFm:npRrSyZz")) != -1) { 96 switch (ch) { 97 case 'b': 98 skipclean = 0; 99 bflag = argtoimax('b', "number", optarg, 10); 100 printf("Alternate super block location: %jd\n", bflag); 101 break; 102 103 case 'B': 104 bkgrdflag = 1; 105 break; 106 107 case 'c': 108 skipclean = 0; 109 cvtlevel = argtoimax('c', "conversion level", optarg, 110 10); 111 if (cvtlevel < 3) 112 errx(EEXIT, "cannot do level %d conversion", 113 cvtlevel); 114 break; 115 116 case 'd': 117 debug++; 118 break; 119 120 case 'E': 121 Eflag++; 122 break; 123 124 case 'f': 125 skipclean = 0; 126 break; 127 128 case 'F': 129 bkgrdcheck = 1; 130 break; 131 132 case 'm': 133 lfmode = argtoimax('m', "mode", optarg, 8); 134 if (lfmode &~ 07777) 135 errx(EEXIT, "bad mode to -m: %o", lfmode); 136 printf("** lost+found creation mode %o\n", lfmode); 137 break; 138 139 case 'n': 140 nflag++; 141 yflag = 0; 142 break; 143 144 case 'p': 145 preen++; 146 /*FALLTHROUGH*/ 147 148 case 'C': 149 ckclean++; 150 break; 151 152 case 'R': 153 wantrestart = 1; 154 break; 155 case 'r': 156 inoopt++; 157 break; 158 159 case 'S': 160 surrender = 1; 161 break; 162 163 case 'y': 164 yflag++; 165 nflag = 0; 166 break; 167 168 case 'Z': 169 Zflag++; 170 break; 171 172 case 'z': 173 zflag++; 174 break; 175 176 default: 177 usage(); 178 } 179 } 180 argc -= optind; 181 argv += optind; 182 183 if (!argc) 184 usage(); 185 186 if (bkgrdflag && cvtlevel > 0) { 187 pfatal("CANNOT CONVERT A SNAPSHOT\n"); 188 exit(EEXIT); 189 } 190 191 if (signal(SIGINT, SIG_IGN) != SIG_IGN) 192 (void)signal(SIGINT, catch); 193 if (ckclean) 194 (void)signal(SIGQUIT, catchquit); 195 signal(SIGINFO, infohandler); 196 if (bkgrdflag) { 197 signal(SIGALRM, alarmhandler); 198 itimerval.it_interval.tv_sec = 5; 199 itimerval.it_interval.tv_usec = 0; 200 itimerval.it_value.tv_sec = 5; 201 itimerval.it_value.tv_usec = 0; 202 setitimer(ITIMER_REAL, &itimerval, NULL); 203 } 204 /* 205 * Push up our allowed memory limit so we can cope 206 * with huge file systems. 207 */ 208 if (getrlimit(RLIMIT_DATA, &rlimit) == 0) { 209 rlimit.rlim_cur = rlimit.rlim_max; 210 (void)setrlimit(RLIMIT_DATA, &rlimit); 211 } 212 while (argc > 0) { 213 if ((fsret = checkfilesys(*argv)) == ERESTART) 214 continue; 215 ret |= fsret; 216 argc--; 217 argv++; 218 } 219 220 if (returntosingle) 221 ret = 2; 222 exit(ret); 223 } 224 225 static intmax_t 226 argtoimax(int flag, const char *req, const char *str, int base) 227 { 228 char *cp; 229 intmax_t ret; 230 231 ret = strtoimax(str, &cp, base); 232 if (cp == str || *cp) 233 errx(EEXIT, "-%c flag requires a %s", flag, req); 234 return (ret); 235 } 236 237 /* 238 * Check the specified file system. 239 */ 240 /* ARGSUSED */ 241 static int 242 checkfilesys(char *filesys) 243 { 244 ufs2_daddr_t n_ffree, n_bfree; 245 struct dups *dp; 246 struct statfs *mntp; 247 intmax_t blks, files; 248 size_t size; 249 int sbreadfailed, ofsmodified; 250 251 fsutilinit(); 252 fsckinit(); 253 254 cdevname = filesys; 255 if (debug && ckclean) 256 pwarn("starting\n"); 257 /* 258 * Make best effort to get the disk name. Check first to see 259 * if it is listed among the mounted file systems. Failing that 260 * check to see if it is listed in /etc/fstab. 261 */ 262 mntp = getmntpt(filesys); 263 if (mntp != NULL) 264 filesys = mntp->f_mntfromname; 265 else 266 filesys = blockcheck(filesys); 267 /* 268 * If -F flag specified, check to see whether a background check 269 * is possible and needed. If possible and needed, exit with 270 * status zero. Otherwise exit with status non-zero. A non-zero 271 * exit status will cause a foreground check to be run. 272 */ 273 sblock_init(); 274 sbreadfailed = 0; 275 if (openfilesys(filesys) == 0 || readsb(0) == 0) 276 sbreadfailed = 1; 277 if (bkgrdcheck) { 278 if (sbreadfailed) 279 exit(3); /* Cannot read superblock */ 280 /* Earlier background failed or journaled */ 281 if (sblock.fs_flags & (FS_NEEDSFSCK | FS_SUJ)) 282 exit(4); 283 if ((sblock.fs_flags & FS_DOSOFTDEP) == 0) 284 exit(5); /* Not running soft updates */ 285 size = MIBSIZE; 286 if (sysctlnametomib("vfs.ffs.adjrefcnt", adjrefcnt, &size) < 0) 287 exit(6); /* Lacks kernel support */ 288 if ((mntp == NULL && sblock.fs_clean == 1) || 289 (mntp != NULL && (sblock.fs_flags & FS_UNCLEAN) == 0)) 290 exit(7); /* Filesystem clean, report it now */ 291 exit(0); 292 } 293 if (ckclean && skipclean) { 294 /* 295 * If file system is gjournaled, check it here. 296 */ 297 if (sbreadfailed) 298 exit(3); /* Cannot read superblock */ 299 if (bkgrdflag == 0 && 300 (nflag || (fswritefd = open(filesys, O_WRONLY)) < 0)) { 301 fswritefd = -1; 302 if (preen) 303 pfatal("NO WRITE ACCESS"); 304 printf(" (NO WRITE)"); 305 } 306 if ((sblock.fs_flags & FS_GJOURNAL) != 0) { 307 if (sblock.fs_clean == 1) { 308 pwarn("FILE SYSTEM CLEAN; SKIPPING CHECKS\n"); 309 exit(0); 310 } 311 if ((sblock.fs_flags & 312 (FS_UNCLEAN | FS_NEEDSFSCK)) == 0) { 313 bufinit(); 314 gjournal_check(filesys); 315 if (chkdoreload(mntp) == 0) 316 exit(0); 317 exit(4); 318 } else { 319 pfatal("FULL FSCK NEEDED, CANNOT RUN FAST " 320 "FSCK\n"); 321 } 322 } 323 close(fswritefd); 324 fswritefd = -1; 325 } 326 if (bkgrdflag) { 327 switch (setup_bkgrdchk(mntp, sbreadfailed, &filesys)) { 328 case -1: /* filesystem clean */ 329 goto clean; 330 case 0: /* cannot do background, give up */ 331 exit(EEXIT); 332 case 1: /* doing background check, preen rules apply */ 333 preen = 1; 334 break; 335 } 336 } 337 338 switch (setup(filesys)) { 339 case 0: 340 if (preen) 341 pfatal("CAN'T CHECK FILE SYSTEM."); 342 return (EEXIT); 343 case -1: 344 clean: 345 pwarn("clean, %ld free ", (long)(sblock.fs_cstotal.cs_nffree + 346 sblock.fs_frag * sblock.fs_cstotal.cs_nbfree)); 347 printf("(%jd frags, %jd blocks, %.1f%% fragmentation)\n", 348 (intmax_t)sblock.fs_cstotal.cs_nffree, 349 (intmax_t)sblock.fs_cstotal.cs_nbfree, 350 sblock.fs_cstotal.cs_nffree * 100.0 / sblock.fs_dsize); 351 return (0); 352 } 353 /* 354 * Determine if we can and should do journal recovery. 355 */ 356 if ((sblock.fs_flags & FS_SUJ) == FS_SUJ) { 357 if ((sblock.fs_flags & FS_NEEDSFSCK) != FS_NEEDSFSCK && skipclean) { 358 sujrecovery = 1; 359 if (suj_check(filesys) == 0) { 360 printf("\n***** FILE SYSTEM MARKED CLEAN *****\n"); 361 if (chkdoreload(mntp) == 0) 362 exit(0); 363 exit(4); 364 } 365 sujrecovery = 0; 366 printf("** Skipping journal, falling through to full fsck\n\n"); 367 } 368 if (fswritefd != -1) { 369 /* 370 * Write the superblock so we don't try to recover the 371 * journal on another pass. If this is the only change 372 * to the filesystem, we do not want it to be called 373 * out as modified. 374 */ 375 sblock.fs_mtime = time(NULL); 376 sbdirty(); 377 ofsmodified = fsmodified; 378 flush(fswritefd, &sblk); 379 fsmodified = ofsmodified; 380 } 381 } 382 /* 383 * If the filesystem was run on an old kernel that did not 384 * support check hashes, clear the check-hash flags so that 385 * we do not try to verify them. 386 */ 387 if ((sblock.fs_flags & FS_METACKHASH) == 0) 388 sblock.fs_metackhash = 0; 389 /* 390 * If we are running on a kernel that can provide check hashes 391 * that are not yet enabled for the filesystem and we are 392 * running manually without the -y flag, offer to add any 393 * supported check hashes that are not already enabled. 394 */ 395 ckhashadd = 0; 396 if (preen == 0 && yflag == 0 && sblock.fs_magic != FS_UFS1_MAGIC && 397 fswritefd != -1 && getosreldate() >= P_OSREL_CK_CYLGRP) { 398 if ((sblock.fs_metackhash & CK_CYLGRP) == 0 && 399 reply("ADD CYLINDER GROUP CHECK-HASH PROTECTION") != 0) { 400 ckhashadd |= CK_CYLGRP; 401 sblock.fs_metackhash |= CK_CYLGRP; 402 } 403 if ((sblock.fs_metackhash & CK_SUPERBLOCK) == 0 && 404 getosreldate() >= P_OSREL_CK_SUPERBLOCK && 405 reply("ADD SUPERBLOCK CHECK-HASH PROTECTION") != 0) { 406 ckhashadd |= CK_SUPERBLOCK; 407 sblock.fs_metackhash |= CK_SUPERBLOCK; 408 } 409 if ((sblock.fs_metackhash & CK_INODE) == 0 && 410 getosreldate() >= P_OSREL_CK_INODE && 411 reply("ADD INODE CHECK-HASH PROTECTION") != 0) { 412 ckhashadd |= CK_INODE; 413 sblock.fs_metackhash |= CK_INODE; 414 } 415 #ifdef notyet 416 if ((sblock.fs_metackhash & CK_INDIR) == 0 && 417 getosreldate() >= P_OSREL_CK_INDIR && 418 reply("ADD INDIRECT BLOCK CHECK-HASH PROTECTION") != 0) { 419 ckhashadd |= CK_INDIR; 420 sblock.fs_metackhash |= CK_INDIR; 421 } 422 if ((sblock.fs_metackhash & CK_DIR) == 0 && 423 getosreldate() >= P_OSREL_CK_DIR && 424 reply("ADD DIRECTORY CHECK-HASH PROTECTION") != 0) { 425 ckhashadd |= CK_DIR; 426 sblock.fs_metackhash |= CK_DIR; 427 } 428 #endif /* notyet */ 429 if (ckhashadd != 0) { 430 sblock.fs_flags |= FS_METACKHASH; 431 sbdirty(); 432 } 433 } 434 /* 435 * Cleared if any questions answered no. Used to decide if 436 * the superblock should be marked clean. 437 */ 438 resolved = 1; 439 /* 440 * 1: scan inodes tallying blocks used 441 */ 442 if (preen == 0) { 443 printf("** Last Mounted on %s\n", sblock.fs_fsmnt); 444 if (mntp != NULL && mntp->f_flags & MNT_ROOTFS) 445 printf("** Root file system\n"); 446 printf("** Phase 1 - Check Blocks and Sizes\n"); 447 } 448 clock_gettime(CLOCK_REALTIME_PRECISE, &startprog); 449 pass1(); 450 IOstats("Pass1"); 451 452 /* 453 * 1b: locate first references to duplicates, if any 454 */ 455 if (duplist) { 456 if (preen || usedsoftdep) 457 pfatal("INTERNAL ERROR: DUPS WITH %s%s%s", 458 preen ? "-p" : "", 459 (preen && usedsoftdep) ? " AND " : "", 460 usedsoftdep ? "SOFTUPDATES" : ""); 461 printf("** Phase 1b - Rescan For More DUPS\n"); 462 pass1b(); 463 IOstats("Pass1b"); 464 } 465 466 /* 467 * 2: traverse directories from root to mark all connected directories 468 */ 469 if (preen == 0) 470 printf("** Phase 2 - Check Pathnames\n"); 471 pass2(); 472 IOstats("Pass2"); 473 474 /* 475 * 3: scan inodes looking for disconnected directories 476 */ 477 if (preen == 0) 478 printf("** Phase 3 - Check Connectivity\n"); 479 pass3(); 480 IOstats("Pass3"); 481 482 /* 483 * 4: scan inodes looking for disconnected files; check reference counts 484 */ 485 if (preen == 0) 486 printf("** Phase 4 - Check Reference Counts\n"); 487 pass4(); 488 IOstats("Pass4"); 489 490 /* 491 * 5: check and repair resource counts in cylinder groups 492 */ 493 if (preen == 0) 494 printf("** Phase 5 - Check Cyl groups\n"); 495 pass5(); 496 IOstats("Pass5"); 497 498 /* 499 * print out summary statistics 500 */ 501 n_ffree = sblock.fs_cstotal.cs_nffree; 502 n_bfree = sblock.fs_cstotal.cs_nbfree; 503 files = maxino - UFS_ROOTINO - sblock.fs_cstotal.cs_nifree - n_files; 504 blks = n_blks + 505 sblock.fs_ncg * (cgdmin(&sblock, 0) - cgsblock(&sblock, 0)); 506 blks += cgsblock(&sblock, 0) - cgbase(&sblock, 0); 507 blks += howmany(sblock.fs_cssize, sblock.fs_fsize); 508 blks = maxfsblock - (n_ffree + sblock.fs_frag * n_bfree) - blks; 509 if (bkgrdflag && (files > 0 || blks > 0)) { 510 countdirs = sblock.fs_cstotal.cs_ndir - countdirs; 511 pwarn("Reclaimed: %ld directories, %jd files, %jd fragments\n", 512 countdirs, files - countdirs, blks); 513 } 514 pwarn("%ld files, %jd used, %ju free ", 515 (long)n_files, (intmax_t)n_blks, 516 (uintmax_t)n_ffree + sblock.fs_frag * n_bfree); 517 printf("(%ju frags, %ju blocks, %.1f%% fragmentation)\n", 518 (uintmax_t)n_ffree, (uintmax_t)n_bfree, 519 n_ffree * 100.0 / sblock.fs_dsize); 520 if (debug) { 521 if (files < 0) 522 printf("%jd inodes missing\n", -files); 523 if (blks < 0) 524 printf("%jd blocks missing\n", -blks); 525 if (duplist != NULL) { 526 printf("The following duplicate blocks remain:"); 527 for (dp = duplist; dp; dp = dp->next) 528 printf(" %jd,", (intmax_t)dp->dup); 529 printf("\n"); 530 } 531 } 532 duplist = (struct dups *)0; 533 muldup = (struct dups *)0; 534 inocleanup(); 535 if (fsmodified) { 536 sblock.fs_time = time(NULL); 537 sbdirty(); 538 } 539 if (cvtlevel && (sblk.b_flags & B_DIRTY) != 0) { 540 /* 541 * Write out the duplicate super blocks 542 */ 543 if (sbput(fswritefd, &sblock, sblock.fs_ncg) == 0) 544 fsmodified = 1; 545 } 546 if (rerun) 547 resolved = 0; 548 549 /* 550 * Check to see if the file system is mounted read-write. 551 */ 552 if (bkgrdflag == 0 && mntp != NULL && (mntp->f_flags & MNT_RDONLY) == 0) 553 resolved = 0; 554 ckfini(resolved); 555 556 if (fsmodified && !preen) 557 printf("\n***** FILE SYSTEM WAS MODIFIED *****\n"); 558 if (rerun) { 559 if (wantrestart && (restarts++ < 10) && 560 (preen || reply("RESTART"))) 561 return (ERESTART); 562 printf("\n***** PLEASE RERUN FSCK *****\n"); 563 } 564 if (chkdoreload(mntp) != 0) { 565 if (!fsmodified) 566 return (0); 567 if (!preen) 568 printf("\n***** REBOOT NOW *****\n"); 569 sync(); 570 return (4); 571 } 572 return (rerun ? ERERUN : 0); 573 } 574 575 /* 576 * If we are to do a background check: 577 * Get the mount point information of the file system 578 * If already clean, return -1 579 * Check that kernel supports background fsck 580 * Find or create the snapshot directory 581 * Create the snapshot file 582 * Open snapshot 583 * If anything fails print reason and return 0 which exits 584 */ 585 static int 586 setup_bkgrdchk(struct statfs *mntp, int sbreadfailed, char **filesys) 587 { 588 struct stat snapdir; 589 struct group *grp; 590 struct iovec *iov; 591 char errmsg[255]; 592 int iovlen; 593 size_t size; 594 595 /* Get the mount point information of the file system */ 596 if (mntp == NULL) { 597 pwarn("NOT MOUNTED, CANNOT RUN IN BACKGROUND\n"); 598 return (0); 599 } 600 if ((mntp->f_flags & MNT_RDONLY) != 0) { 601 pwarn("MOUNTED READ-ONLY, CANNOT RUN IN BACKGROUND\n"); 602 return (0); 603 } 604 if ((mntp->f_flags & MNT_SOFTDEP) == 0) { 605 pwarn("NOT USING SOFT UPDATES, CANNOT RUN IN BACKGROUND\n"); 606 return (0); 607 } 608 if (sbreadfailed) { 609 pwarn("SUPERBLOCK READ FAILED, CANNOT RUN IN BACKGROUND\n"); 610 return (0); 611 } 612 if ((sblock.fs_flags & FS_NEEDSFSCK) != 0) { 613 pwarn("FULL FSCK NEEDED, CANNOT RUN IN BACKGROUND\n"); 614 return (0); 615 } 616 if ((sblock.fs_flags & FS_SUJ) != 0) { 617 pwarn("JOURNALED FILESYSTEM, CANNOT RUN IN BACKGROUND\n"); 618 return (0); 619 } 620 if (skipclean && ckclean && 621 (sblock.fs_flags & (FS_UNCLEAN|FS_NEEDSFSCK)) == 0) { 622 /* 623 * file system is clean; 624 * skip snapshot and report it clean 625 */ 626 pwarn("FILE SYSTEM CLEAN; SKIPPING CHECKS\n"); 627 return (-1); 628 } 629 /* Check that kernel supports background fsck */ 630 size = MIBSIZE; 631 if (sysctlnametomib("vfs.ffs.adjrefcnt", adjrefcnt, &size) < 0|| 632 sysctlnametomib("vfs.ffs.adjblkcnt", adjblkcnt, &size) < 0|| 633 sysctlnametomib("vfs.ffs.setsize", setsize, &size) < 0 || 634 sysctlnametomib("vfs.ffs.freefiles", freefiles, &size) < 0|| 635 sysctlnametomib("vfs.ffs.freedirs", freedirs, &size) < 0 || 636 sysctlnametomib("vfs.ffs.freeblks", freeblks, &size) < 0) { 637 pwarn("KERNEL LACKS BACKGROUND FSCK SUPPORT\n"); 638 return (0); 639 } 640 /* 641 * When kernel lacks runtime bgfsck superblock summary 642 * adjustment functionality, it does not mean we can not 643 * continue, as old kernels will recompute the summary at 644 * mount time. However, it will be an unexpected softupdates 645 * inconsistency if it turns out that the summary is still 646 * incorrect. Set a flag so subsequent operation can know this. 647 */ 648 bkgrdsumadj = 1; 649 if (sysctlnametomib("vfs.ffs.adjndir", adjndir, &size) < 0 || 650 sysctlnametomib("vfs.ffs.adjnbfree", adjnbfree, &size) < 0 || 651 sysctlnametomib("vfs.ffs.adjnifree", adjnifree, &size) < 0 || 652 sysctlnametomib("vfs.ffs.adjnffree", adjnffree, &size) < 0 || 653 sysctlnametomib("vfs.ffs.adjnumclusters", adjnumclusters, 654 &size) < 0) { 655 bkgrdsumadj = 0; 656 pwarn("KERNEL LACKS RUNTIME SUPERBLOCK SUMMARY ADJUSTMENT " 657 "SUPPORT\n"); 658 } 659 /* Find or create the snapshot directory */ 660 snprintf(snapname, sizeof snapname, "%s/.snap", 661 mntp->f_mntonname); 662 if (stat(snapname, &snapdir) < 0) { 663 if (errno != ENOENT) { 664 pwarn("CANNOT FIND SNAPSHOT DIRECTORY %s: %s, CANNOT " 665 "RUN IN BACKGROUND\n", snapname, strerror(errno)); 666 return (0); 667 } 668 if ((grp = getgrnam("operator")) == NULL || 669 mkdir(snapname, 0770) < 0 || 670 chown(snapname, -1, grp->gr_gid) < 0 || 671 chmod(snapname, 0770) < 0) { 672 pwarn("CANNOT CREATE SNAPSHOT DIRECTORY %s: %s, " 673 "CANNOT RUN IN BACKGROUND\n", snapname, 674 strerror(errno)); 675 return (0); 676 } 677 } else if (!S_ISDIR(snapdir.st_mode)) { 678 pwarn("%s IS NOT A DIRECTORY, CANNOT RUN IN BACKGROUND\n", 679 snapname); 680 return (0); 681 } 682 /* Create the snapshot file */ 683 iov = NULL; 684 iovlen = 0; 685 errmsg[0] = '\0'; 686 snprintf(snapname, sizeof snapname, "%s/.snap/fsck_snapshot", 687 mntp->f_mntonname); 688 build_iovec(&iov, &iovlen, "fstype", "ffs", 4); 689 build_iovec(&iov, &iovlen, "from", snapname, (size_t)-1); 690 build_iovec(&iov, &iovlen, "fspath", mntp->f_mntonname, (size_t)-1); 691 build_iovec(&iov, &iovlen, "errmsg", errmsg, sizeof(errmsg)); 692 build_iovec(&iov, &iovlen, "update", NULL, 0); 693 build_iovec(&iov, &iovlen, "snapshot", NULL, 0); 694 /* Create snapshot, removing old snapshot it it exists */ 695 while (nmount(iov, iovlen, mntp->f_flags) < 0) { 696 if (errno == EEXIST && unlink(snapname) == 0) 697 continue; 698 pwarn("CANNOT CREATE SNAPSHOT %s: %s %s\n", snapname, 699 strerror(errno), errmsg); 700 return (0); 701 } 702 /* Open snapshot */ 703 if (openfilesys(snapname) == 0) { 704 unlink(snapname); 705 pwarn("CANNOT OPEN SNAPSHOT %s: %s, CANNOT RUN IN " 706 "BACKGROUND\n", snapname, strerror(errno)); 707 return (0); 708 } 709 free(sblock.fs_csp); 710 free(sblock.fs_si); 711 havesb = 0; 712 *filesys = snapname; 713 cmd.version = FFS_CMD_VERSION; 714 cmd.handle = fsreadfd; 715 return (1); 716 } 717 718 /* 719 * Open a device or file to be checked by fsck. 720 */ 721 static int 722 openfilesys(char *dev) 723 { 724 struct stat statb; 725 int saved_fsreadfd; 726 727 if (stat(dev, &statb) < 0) { 728 pfatal("CANNOT STAT %s: %s\n", dev, strerror(errno)); 729 return (0); 730 } 731 if ((statb.st_mode & S_IFMT) != S_IFCHR && 732 (statb.st_mode & S_IFMT) != S_IFBLK) { 733 if (bkgrdflag != 0 && (statb.st_flags & SF_SNAPSHOT) == 0) { 734 pfatal("BACKGROUND FSCK LACKS A SNAPSHOT\n"); 735 exit(EEXIT); 736 } 737 if (bkgrdflag != 0) { 738 cursnapshot = statb.st_ino; 739 } else { 740 pfatal("%s IS NOT A DISK DEVICE\n", dev); 741 if (reply("CONTINUE") == 0) 742 return (0); 743 } 744 } 745 saved_fsreadfd = fsreadfd; 746 if ((fsreadfd = open(dev, O_RDONLY)) < 0) { 747 fsreadfd = saved_fsreadfd; 748 pfatal("CANNOT OPEN %s: %s\n", dev, strerror(errno)); 749 return (0); 750 } 751 if (saved_fsreadfd != -1) 752 close(saved_fsreadfd); 753 return (1); 754 } 755 756 static int 757 chkdoreload(struct statfs *mntp) 758 { 759 struct iovec *iov; 760 int iovlen; 761 char errmsg[255]; 762 763 if (mntp == NULL) 764 return (0); 765 766 iov = NULL; 767 iovlen = 0; 768 errmsg[0] = '\0'; 769 /* 770 * We modified a mounted file system. Do a mount update on 771 * it unless it is read-write, so we can continue using it 772 * as safely as possible. 773 */ 774 if (mntp->f_flags & MNT_RDONLY) { 775 build_iovec(&iov, &iovlen, "fstype", "ffs", 4); 776 build_iovec(&iov, &iovlen, "from", mntp->f_mntfromname, 777 (size_t)-1); 778 build_iovec(&iov, &iovlen, "fspath", mntp->f_mntonname, 779 (size_t)-1); 780 build_iovec(&iov, &iovlen, "errmsg", errmsg, 781 sizeof(errmsg)); 782 build_iovec(&iov, &iovlen, "update", NULL, 0); 783 build_iovec(&iov, &iovlen, "reload", NULL, 0); 784 /* 785 * XX: We need the following line until we clean up 786 * nmount parsing of root mounts and NFS root mounts. 787 */ 788 build_iovec(&iov, &iovlen, "ro", NULL, 0); 789 if (nmount(iov, iovlen, mntp->f_flags) == 0) { 790 return (0); 791 } 792 pwarn("mount reload of '%s' failed: %s %s\n\n", 793 mntp->f_mntonname, strerror(errno), errmsg); 794 return (1); 795 } 796 return (0); 797 } 798 799 /* 800 * Get the mount point information for name. 801 */ 802 static struct statfs * 803 getmntpt(const char *name) 804 { 805 struct stat devstat, mntdevstat; 806 char device[sizeof(_PATH_DEV) - 1 + MNAMELEN]; 807 char *ddevname; 808 struct statfs *mntbuf, *statfsp; 809 int i, mntsize, isdev; 810 811 if (stat(name, &devstat) != 0) 812 return (NULL); 813 if (S_ISCHR(devstat.st_mode) || S_ISBLK(devstat.st_mode)) 814 isdev = 1; 815 else 816 isdev = 0; 817 mntsize = getmntinfo(&mntbuf, MNT_NOWAIT); 818 for (i = 0; i < mntsize; i++) { 819 statfsp = &mntbuf[i]; 820 ddevname = statfsp->f_mntfromname; 821 if (*ddevname != '/') { 822 if (strlen(_PATH_DEV) + strlen(ddevname) + 1 > 823 sizeof(statfsp->f_mntfromname)) 824 continue; 825 strcpy(device, _PATH_DEV); 826 strcat(device, ddevname); 827 strcpy(statfsp->f_mntfromname, device); 828 } 829 if (isdev == 0) { 830 if (strcmp(name, statfsp->f_mntonname)) 831 continue; 832 return (statfsp); 833 } 834 if (stat(ddevname, &mntdevstat) == 0 && 835 mntdevstat.st_rdev == devstat.st_rdev) 836 return (statfsp); 837 } 838 statfsp = NULL; 839 return (statfsp); 840 } 841 842 static void 843 usage(void) 844 { 845 (void) fprintf(stderr, 846 "usage: %s [-BCdEFfnpRrSyZ] [-b block] [-c level] [-m mode] filesystem ...\n", 847 getprogname()); 848 exit(1); 849 } 850 851 void 852 infohandler(int sig __unused) 853 { 854 got_siginfo = 1; 855 } 856 857 void 858 alarmhandler(int sig __unused) 859 { 860 got_sigalarm = 1; 861 } 862