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 <mntopts.h> 65 #include <paths.h> 66 #include <stdint.h> 67 #include <string.h> 68 #include <time.h> 69 70 #include "fsck.h" 71 72 int restarts; 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 chkdoreload(struct statfs *mntp); 78 static struct statfs *getmntpt(const char *); 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 (signal(SIGINT, SIG_IGN) != SIG_IGN) 184 (void)signal(SIGINT, catch); 185 if (ckclean) 186 (void)signal(SIGQUIT, catchquit); 187 signal(SIGINFO, infohandler); 188 if (bkgrdflag) { 189 signal(SIGALRM, alarmhandler); 190 itimerval.it_interval.tv_sec = 5; 191 itimerval.it_interval.tv_usec = 0; 192 itimerval.it_value.tv_sec = 5; 193 itimerval.it_value.tv_usec = 0; 194 setitimer(ITIMER_REAL, &itimerval, NULL); 195 } 196 /* 197 * Push up our allowed memory limit so we can cope 198 * with huge file systems. 199 */ 200 if (getrlimit(RLIMIT_DATA, &rlimit) == 0) { 201 rlimit.rlim_cur = rlimit.rlim_max; 202 (void)setrlimit(RLIMIT_DATA, &rlimit); 203 } 204 while (argc > 0) { 205 if ((fsret = checkfilesys(*argv)) == ERESTART) 206 continue; 207 ret |= fsret; 208 argc--; 209 argv++; 210 } 211 212 if (returntosingle) 213 ret = 2; 214 exit(ret); 215 } 216 217 static intmax_t 218 argtoimax(int flag, const char *req, const char *str, int base) 219 { 220 char *cp; 221 intmax_t ret; 222 223 ret = strtoimax(str, &cp, base); 224 if (cp == str || *cp) 225 errx(EEXIT, "-%c flag requires a %s", flag, req); 226 return (ret); 227 } 228 229 /* 230 * Check the specified file system. 231 */ 232 /* ARGSUSED */ 233 static int 234 checkfilesys(char *filesys) 235 { 236 ufs2_daddr_t n_ffree, n_bfree; 237 struct dups *dp; 238 struct statfs *mntp; 239 struct stat snapdir; 240 struct group *grp; 241 struct iovec *iov; 242 char errmsg[255]; 243 int ofsmodified; 244 int iovlen; 245 int cylno; 246 intmax_t blks, files; 247 size_t size; 248 249 iov = NULL; 250 iovlen = 0; 251 errmsg[0] = '\0'; 252 fsutilinit(); 253 fsckinit(); 254 255 cdevname = filesys; 256 if (debug && ckclean) 257 pwarn("starting\n"); 258 /* 259 * Make best effort to get the disk name. Check first to see 260 * if it is listed among the mounted file systems. Failing that 261 * check to see if it is listed in /etc/fstab. 262 */ 263 mntp = getmntpt(filesys); 264 if (mntp != NULL) 265 filesys = mntp->f_mntfromname; 266 else 267 filesys = blockcheck(filesys); 268 /* 269 * If -F flag specified, check to see whether a background check 270 * is possible and needed. If possible and needed, exit with 271 * status zero. Otherwise exit with status non-zero. A non-zero 272 * exit status will cause a foreground check to be run. 273 */ 274 sblock_init(); 275 if (bkgrdcheck) { 276 if ((fsreadfd = open(filesys, O_RDONLY)) < 0 || readsb(0) == 0) 277 exit(3); /* Cannot read superblock */ 278 close(fsreadfd); 279 /* Earlier background failed or journaled */ 280 if (sblock.fs_flags & (FS_NEEDSFSCK | FS_SUJ)) 281 exit(4); 282 if ((sblock.fs_flags & FS_DOSOFTDEP) == 0) 283 exit(5); /* Not running soft updates */ 284 size = MIBSIZE; 285 if (sysctlnametomib("vfs.ffs.adjrefcnt", adjrefcnt, &size) < 0) 286 exit(6); /* Lacks kernel support */ 287 if ((mntp == NULL && sblock.fs_clean == 1) || 288 (mntp != NULL && (sblock.fs_flags & FS_UNCLEAN) == 0)) 289 exit(7); /* Filesystem clean, report it now */ 290 exit(0); 291 } 292 if (ckclean && skipclean) { 293 /* 294 * If file system is gjournaled, check it here. 295 */ 296 if ((fsreadfd = open(filesys, O_RDONLY)) < 0 || readsb(0) == 0) 297 exit(3); /* Cannot read superblock */ 298 close(fsreadfd); 299 if ((sblock.fs_flags & FS_GJOURNAL) != 0) { 300 //printf("GJournaled file system detected on %s.\n", 301 // filesys); 302 if (sblock.fs_clean == 1) { 303 pwarn("FILE SYSTEM CLEAN; SKIPPING CHECKS\n"); 304 exit(0); 305 } 306 if ((sblock.fs_flags & (FS_UNCLEAN | FS_NEEDSFSCK)) == 0) { 307 gjournal_check(filesys); 308 if (chkdoreload(mntp) == 0) 309 exit(0); 310 exit(4); 311 } else { 312 pfatal( 313 "UNEXPECTED INCONSISTENCY, CANNOT RUN FAST FSCK\n"); 314 } 315 } 316 } 317 /* 318 * If we are to do a background check: 319 * Get the mount point information of the file system 320 * create snapshot file 321 * return created snapshot file 322 * if not found, clear bkgrdflag and proceed with normal fsck 323 */ 324 if (bkgrdflag) { 325 if (mntp == NULL) { 326 bkgrdflag = 0; 327 pfatal("NOT MOUNTED, CANNOT RUN IN BACKGROUND\n"); 328 } else if ((mntp->f_flags & MNT_SOFTDEP) == 0) { 329 bkgrdflag = 0; 330 pfatal( 331 "NOT USING SOFT UPDATES, CANNOT RUN IN BACKGROUND\n"); 332 } else if ((mntp->f_flags & MNT_RDONLY) != 0) { 333 bkgrdflag = 0; 334 pfatal("MOUNTED READ-ONLY, CANNOT RUN IN BACKGROUND\n"); 335 } else if ((fsreadfd = open(filesys, O_RDONLY)) >= 0) { 336 if (readsb(0) != 0) { 337 if (sblock.fs_flags & (FS_NEEDSFSCK | FS_SUJ)) { 338 bkgrdflag = 0; 339 pfatal( 340 "UNEXPECTED INCONSISTENCY, CANNOT RUN IN BACKGROUND\n"); 341 } 342 if ((sblock.fs_flags & FS_UNCLEAN) == 0 && 343 skipclean && ckclean) { 344 /* 345 * file system is clean; 346 * skip snapshot and report it clean 347 */ 348 pwarn( 349 "FILE SYSTEM CLEAN; SKIPPING CHECKS\n"); 350 goto clean; 351 } 352 } 353 close(fsreadfd); 354 } 355 if (bkgrdflag) { 356 snprintf(snapname, sizeof snapname, "%s/.snap", 357 mntp->f_mntonname); 358 if (stat(snapname, &snapdir) < 0) { 359 if (errno != ENOENT) { 360 bkgrdflag = 0; 361 pfatal( 362 "CANNOT FIND SNAPSHOT DIRECTORY %s: %s, CANNOT RUN IN BACKGROUND\n", 363 snapname, strerror(errno)); 364 } else if ((grp = getgrnam("operator")) == NULL || 365 mkdir(snapname, 0770) < 0 || 366 chown(snapname, -1, grp->gr_gid) < 0 || 367 chmod(snapname, 0770) < 0) { 368 bkgrdflag = 0; 369 pfatal( 370 "CANNOT CREATE SNAPSHOT DIRECTORY %s: %s, CANNOT RUN IN BACKGROUND\n", 371 snapname, strerror(errno)); 372 } 373 } else if (!S_ISDIR(snapdir.st_mode)) { 374 bkgrdflag = 0; 375 pfatal( 376 "%s IS NOT A DIRECTORY, CANNOT RUN IN BACKGROUND\n", 377 snapname); 378 } 379 } 380 if (bkgrdflag) { 381 snprintf(snapname, sizeof snapname, 382 "%s/.snap/fsck_snapshot", mntp->f_mntonname); 383 build_iovec(&iov, &iovlen, "fstype", "ffs", 4); 384 build_iovec(&iov, &iovlen, "from", snapname, 385 (size_t)-1); 386 build_iovec(&iov, &iovlen, "fspath", mntp->f_mntonname, 387 (size_t)-1); 388 build_iovec(&iov, &iovlen, "errmsg", errmsg, 389 sizeof(errmsg)); 390 build_iovec(&iov, &iovlen, "update", NULL, 0); 391 build_iovec(&iov, &iovlen, "snapshot", NULL, 0); 392 393 while (nmount(iov, iovlen, mntp->f_flags) < 0) { 394 if (errno == EEXIST && unlink(snapname) == 0) 395 continue; 396 bkgrdflag = 0; 397 pfatal("CANNOT CREATE SNAPSHOT %s: %s %s\n", 398 snapname, strerror(errno), errmsg); 399 break; 400 } 401 if (bkgrdflag != 0) 402 filesys = snapname; 403 } 404 } 405 406 switch (setup(filesys)) { 407 case 0: 408 if (preen) 409 pfatal("CAN'T CHECK FILE SYSTEM."); 410 return (0); 411 case -1: 412 clean: 413 pwarn("clean, %ld free ", (long)(sblock.fs_cstotal.cs_nffree + 414 sblock.fs_frag * sblock.fs_cstotal.cs_nbfree)); 415 printf("(%jd frags, %jd blocks, %.1f%% fragmentation)\n", 416 (intmax_t)sblock.fs_cstotal.cs_nffree, 417 (intmax_t)sblock.fs_cstotal.cs_nbfree, 418 sblock.fs_cstotal.cs_nffree * 100.0 / sblock.fs_dsize); 419 return (0); 420 } 421 /* 422 * Determine if we can and should do journal recovery. 423 */ 424 if ((sblock.fs_flags & FS_SUJ) == FS_SUJ) { 425 if ((sblock.fs_flags & FS_NEEDSFSCK) != FS_NEEDSFSCK && skipclean) { 426 if (preen || reply("USE JOURNAL")) { 427 if (suj_check(filesys) == 0) { 428 printf("\n***** FILE SYSTEM MARKED CLEAN *****\n"); 429 if (chkdoreload(mntp) == 0) 430 exit(0); 431 exit(4); 432 } 433 } 434 printf("** Skipping journal, falling through to full fsck\n\n"); 435 } 436 /* 437 * Write the superblock so we don't try to recover the 438 * journal on another pass. If this is the only change 439 * to the filesystem, we do not want it to be called 440 * out as modified. 441 */ 442 sblock.fs_mtime = time(NULL); 443 sbdirty(); 444 ofsmodified = fsmodified; 445 flush(fswritefd, &sblk); 446 fsmodified = ofsmodified; 447 } 448 /* 449 * If the filesystem was run on an old kernel that did not 450 * support check hashes, clear the check-hash flags so that 451 * we do not try to verify them. 452 */ 453 if ((sblock.fs_flags & FS_METACKHASH) == 0) 454 sblock.fs_metackhash = 0; 455 /* 456 * If we are running on a kernel that can provide check hashes 457 * that are not yet enabled for the filesystem and we are 458 * running manually without the -y flag, offer to add any 459 * supported check hashes that are not already enabled. 460 */ 461 ckhashadd = 0; 462 if (preen == 0 && yflag == 0 && sblock.fs_magic != FS_UFS1_MAGIC && 463 fswritefd != -1 && getosreldate() >= P_OSREL_CK_CYLGRP) { 464 if ((sblock.fs_metackhash & CK_CYLGRP) == 0 && 465 reply("ADD CYLINDER GROUP CHECK-HASH PROTECTION") != 0) { 466 ckhashadd |= CK_CYLGRP; 467 sblock.fs_metackhash |= CK_CYLGRP; 468 } 469 if ((sblock.fs_metackhash & CK_SUPERBLOCK) == 0 && 470 getosreldate() >= P_OSREL_CK_SUPERBLOCK && 471 reply("ADD SUPERBLOCK CHECK-HASH PROTECTION") != 0) { 472 ckhashadd |= CK_SUPERBLOCK; 473 sblock.fs_metackhash |= CK_SUPERBLOCK; 474 } 475 if ((sblock.fs_metackhash & CK_INODE) == 0 && 476 getosreldate() >= P_OSREL_CK_INODE && 477 reply("ADD INODE CHECK-HASH PROTECTION") != 0) { 478 ckhashadd |= CK_INODE; 479 sblock.fs_metackhash |= CK_INODE; 480 } 481 #ifdef notyet 482 if ((sblock.fs_metackhash & CK_INDIR) == 0 && 483 getosreldate() >= P_OSREL_CK_INDIR && 484 reply("ADD INDIRECT BLOCK CHECK-HASH PROTECTION") != 0) { 485 ckhashadd |= CK_INDIR; 486 sblock.fs_metackhash |= CK_INDIR; 487 } 488 if ((sblock.fs_metackhash & CK_DIR) == 0 && 489 getosreldate() >= P_OSREL_CK_DIR && 490 reply("ADD DIRECTORY CHECK-HASH PROTECTION") != 0) { 491 ckhashadd |= CK_DIR; 492 sblock.fs_metackhash |= CK_DIR; 493 } 494 #endif /* notyet */ 495 if (ckhashadd != 0) { 496 sblock.fs_flags |= FS_METACKHASH; 497 sbdirty(); 498 } 499 } 500 /* 501 * Cleared if any questions answered no. Used to decide if 502 * the superblock should be marked clean. 503 */ 504 resolved = 1; 505 /* 506 * 1: scan inodes tallying blocks used 507 */ 508 if (preen == 0) { 509 printf("** Last Mounted on %s\n", sblock.fs_fsmnt); 510 if (mntp != NULL && mntp->f_flags & MNT_ROOTFS) 511 printf("** Root file system\n"); 512 printf("** Phase 1 - Check Blocks and Sizes\n"); 513 } 514 clock_gettime(CLOCK_REALTIME_PRECISE, &startprog); 515 pass1(); 516 IOstats("Pass1"); 517 518 /* 519 * 1b: locate first references to duplicates, if any 520 */ 521 if (duplist) { 522 if (preen || usedsoftdep) 523 pfatal("INTERNAL ERROR: dups with %s%s%s", 524 preen ? "-p" : "", 525 (preen && usedsoftdep) ? " and " : "", 526 usedsoftdep ? "softupdates" : ""); 527 printf("** Phase 1b - Rescan For More DUPS\n"); 528 pass1b(); 529 IOstats("Pass1b"); 530 } 531 532 /* 533 * 2: traverse directories from root to mark all connected directories 534 */ 535 if (preen == 0) 536 printf("** Phase 2 - Check Pathnames\n"); 537 pass2(); 538 IOstats("Pass2"); 539 540 /* 541 * 3: scan inodes looking for disconnected directories 542 */ 543 if (preen == 0) 544 printf("** Phase 3 - Check Connectivity\n"); 545 pass3(); 546 IOstats("Pass3"); 547 548 /* 549 * 4: scan inodes looking for disconnected files; check reference counts 550 */ 551 if (preen == 0) 552 printf("** Phase 4 - Check Reference Counts\n"); 553 pass4(); 554 IOstats("Pass4"); 555 556 /* 557 * 5: check and repair resource counts in cylinder groups 558 */ 559 if (preen == 0) 560 printf("** Phase 5 - Check Cyl groups\n"); 561 pass5(); 562 IOstats("Pass5"); 563 564 /* 565 * print out summary statistics 566 */ 567 n_ffree = sblock.fs_cstotal.cs_nffree; 568 n_bfree = sblock.fs_cstotal.cs_nbfree; 569 files = maxino - UFS_ROOTINO - sblock.fs_cstotal.cs_nifree - n_files; 570 blks = n_blks + 571 sblock.fs_ncg * (cgdmin(&sblock, 0) - cgsblock(&sblock, 0)); 572 blks += cgsblock(&sblock, 0) - cgbase(&sblock, 0); 573 blks += howmany(sblock.fs_cssize, sblock.fs_fsize); 574 blks = maxfsblock - (n_ffree + sblock.fs_frag * n_bfree) - blks; 575 if (bkgrdflag && (files > 0 || blks > 0)) { 576 countdirs = sblock.fs_cstotal.cs_ndir - countdirs; 577 pwarn("Reclaimed: %ld directories, %jd files, %jd fragments\n", 578 countdirs, files - countdirs, blks); 579 } 580 pwarn("%ld files, %jd used, %ju free ", 581 (long)n_files, (intmax_t)n_blks, 582 (uintmax_t)n_ffree + sblock.fs_frag * n_bfree); 583 printf("(%ju frags, %ju blocks, %.1f%% fragmentation)\n", 584 (uintmax_t)n_ffree, (uintmax_t)n_bfree, 585 n_ffree * 100.0 / sblock.fs_dsize); 586 if (debug) { 587 if (files < 0) 588 printf("%jd inodes missing\n", -files); 589 if (blks < 0) 590 printf("%jd blocks missing\n", -blks); 591 if (duplist != NULL) { 592 printf("The following duplicate blocks remain:"); 593 for (dp = duplist; dp; dp = dp->next) 594 printf(" %jd,", (intmax_t)dp->dup); 595 printf("\n"); 596 } 597 } 598 duplist = (struct dups *)0; 599 muldup = (struct dups *)0; 600 inocleanup(); 601 if (fsmodified) { 602 sblock.fs_time = time(NULL); 603 sbdirty(); 604 } 605 if (cvtlevel && sblk.b_dirty) { 606 /* 607 * Write out the duplicate super blocks 608 */ 609 for (cylno = 0; cylno < sblock.fs_ncg; cylno++) 610 blwrite(fswritefd, (char *)&sblock, 611 fsbtodb(&sblock, cgsblock(&sblock, cylno)), 612 SBLOCKSIZE); 613 } 614 if (rerun) 615 resolved = 0; 616 finalIOstats(); 617 618 /* 619 * Check to see if the file system is mounted read-write. 620 */ 621 if (bkgrdflag == 0 && mntp != NULL && (mntp->f_flags & MNT_RDONLY) == 0) 622 resolved = 0; 623 ckfini(resolved); 624 625 for (cylno = 0; cylno < sblock.fs_ncg; cylno++) 626 if (inostathead[cylno].il_stat != NULL) 627 free((char *)inostathead[cylno].il_stat); 628 free((char *)inostathead); 629 inostathead = NULL; 630 if (fsmodified && !preen) 631 printf("\n***** FILE SYSTEM WAS MODIFIED *****\n"); 632 if (rerun) { 633 if (wantrestart && (restarts++ < 10) && 634 (preen || reply("RESTART"))) 635 return (ERESTART); 636 printf("\n***** PLEASE RERUN FSCK *****\n"); 637 } 638 if (chkdoreload(mntp) != 0) { 639 if (!fsmodified) 640 return (0); 641 if (!preen) 642 printf("\n***** REBOOT NOW *****\n"); 643 sync(); 644 return (4); 645 } 646 return (rerun ? ERERUN : 0); 647 } 648 649 static int 650 chkdoreload(struct statfs *mntp) 651 { 652 struct iovec *iov; 653 int iovlen; 654 char errmsg[255]; 655 656 if (mntp == NULL) 657 return (0); 658 659 iov = NULL; 660 iovlen = 0; 661 errmsg[0] = '\0'; 662 /* 663 * We modified a mounted file system. Do a mount update on 664 * it unless it is read-write, so we can continue using it 665 * as safely as possible. 666 */ 667 if (mntp->f_flags & MNT_RDONLY) { 668 build_iovec(&iov, &iovlen, "fstype", "ffs", 4); 669 build_iovec(&iov, &iovlen, "from", mntp->f_mntfromname, 670 (size_t)-1); 671 build_iovec(&iov, &iovlen, "fspath", mntp->f_mntonname, 672 (size_t)-1); 673 build_iovec(&iov, &iovlen, "errmsg", errmsg, 674 sizeof(errmsg)); 675 build_iovec(&iov, &iovlen, "update", NULL, 0); 676 build_iovec(&iov, &iovlen, "reload", NULL, 0); 677 /* 678 * XX: We need the following line until we clean up 679 * nmount parsing of root mounts and NFS root mounts. 680 */ 681 build_iovec(&iov, &iovlen, "ro", NULL, 0); 682 if (nmount(iov, iovlen, mntp->f_flags) == 0) { 683 return (0); 684 } 685 pwarn("mount reload of '%s' failed: %s %s\n\n", 686 mntp->f_mntonname, strerror(errno), errmsg); 687 return (1); 688 } 689 return (0); 690 } 691 692 /* 693 * Get the mount point information for name. 694 */ 695 static struct statfs * 696 getmntpt(const char *name) 697 { 698 struct stat devstat, mntdevstat; 699 char device[sizeof(_PATH_DEV) - 1 + MNAMELEN]; 700 char *ddevname; 701 struct statfs *mntbuf, *statfsp; 702 int i, mntsize, isdev; 703 704 if (stat(name, &devstat) != 0) 705 return (NULL); 706 if (S_ISCHR(devstat.st_mode) || S_ISBLK(devstat.st_mode)) 707 isdev = 1; 708 else 709 isdev = 0; 710 mntsize = getmntinfo(&mntbuf, MNT_NOWAIT); 711 for (i = 0; i < mntsize; i++) { 712 statfsp = &mntbuf[i]; 713 ddevname = statfsp->f_mntfromname; 714 if (*ddevname != '/') { 715 if (strlen(_PATH_DEV) + strlen(ddevname) + 1 > 716 sizeof(statfsp->f_mntfromname)) 717 continue; 718 strcpy(device, _PATH_DEV); 719 strcat(device, ddevname); 720 strcpy(statfsp->f_mntfromname, device); 721 } 722 if (isdev == 0) { 723 if (strcmp(name, statfsp->f_mntonname)) 724 continue; 725 return (statfsp); 726 } 727 if (stat(ddevname, &mntdevstat) == 0 && 728 mntdevstat.st_rdev == devstat.st_rdev) 729 return (statfsp); 730 } 731 statfsp = NULL; 732 return (statfsp); 733 } 734 735 static void 736 usage(void) 737 { 738 (void) fprintf(stderr, 739 "usage: %s [-BCdEFfnpRrSyZ] [-b block] [-c level] [-m mode] filesystem ...\n", 740 getprogname()); 741 exit(1); 742 } 743 744 void 745 infohandler(int sig __unused) 746 { 747 got_siginfo = 1; 748 } 749 750 void 751 alarmhandler(int sig __unused) 752 { 753 got_sigalarm = 1; 754 } 755