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