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