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:npRrSyZ")) != -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 default: 170 usage(); 171 } 172 } 173 argc -= optind; 174 argv += optind; 175 176 if (!argc) 177 usage(); 178 179 if (signal(SIGINT, SIG_IGN) != SIG_IGN) 180 (void)signal(SIGINT, catch); 181 if (ckclean) 182 (void)signal(SIGQUIT, catchquit); 183 signal(SIGINFO, infohandler); 184 if (bkgrdflag) { 185 signal(SIGALRM, alarmhandler); 186 itimerval.it_interval.tv_sec = 5; 187 itimerval.it_interval.tv_usec = 0; 188 itimerval.it_value.tv_sec = 5; 189 itimerval.it_value.tv_usec = 0; 190 setitimer(ITIMER_REAL, &itimerval, NULL); 191 } 192 /* 193 * Push up our allowed memory limit so we can cope 194 * with huge file systems. 195 */ 196 if (getrlimit(RLIMIT_DATA, &rlimit) == 0) { 197 rlimit.rlim_cur = rlimit.rlim_max; 198 (void)setrlimit(RLIMIT_DATA, &rlimit); 199 } 200 while (argc > 0) { 201 if ((fsret = checkfilesys(*argv)) == ERESTART) 202 continue; 203 ret |= fsret; 204 argc--; 205 argv++; 206 } 207 208 if (returntosingle) 209 ret = 2; 210 exit(ret); 211 } 212 213 static intmax_t 214 argtoimax(int flag, const char *req, const char *str, int base) 215 { 216 char *cp; 217 intmax_t ret; 218 219 ret = strtoimax(str, &cp, base); 220 if (cp == str || *cp) 221 errx(EEXIT, "-%c flag requires a %s", flag, req); 222 return (ret); 223 } 224 225 /* 226 * Check the specified file system. 227 */ 228 /* ARGSUSED */ 229 static int 230 checkfilesys(char *filesys) 231 { 232 ufs2_daddr_t n_ffree, n_bfree; 233 struct dups *dp; 234 struct statfs *mntp; 235 struct stat snapdir; 236 struct group *grp; 237 struct iovec *iov; 238 char errmsg[255]; 239 int ofsmodified; 240 int iovlen; 241 int cylno; 242 intmax_t blks, files; 243 size_t size; 244 245 iov = NULL; 246 iovlen = 0; 247 errmsg[0] = '\0'; 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 = getmntpt(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 if (bkgrdcheck) { 272 if ((fsreadfd = open(filesys, O_RDONLY)) < 0 || readsb(0) == 0) 273 exit(3); /* Cannot read superblock */ 274 close(fsreadfd); 275 /* Earlier background failed or journaled */ 276 if (sblock.fs_flags & (FS_NEEDSFSCK | FS_SUJ)) 277 exit(4); 278 if ((sblock.fs_flags & FS_DOSOFTDEP) == 0) 279 exit(5); /* Not running soft updates */ 280 size = MIBSIZE; 281 if (sysctlnametomib("vfs.ffs.adjrefcnt", adjrefcnt, &size) < 0) 282 exit(6); /* Lacks kernel support */ 283 if ((mntp == NULL && sblock.fs_clean == 1) || 284 (mntp != NULL && (sblock.fs_flags & FS_UNCLEAN) == 0)) 285 exit(7); /* Filesystem clean, report it now */ 286 exit(0); 287 } 288 if (ckclean && skipclean) { 289 /* 290 * If file system is gjournaled, check it here. 291 */ 292 if ((fsreadfd = open(filesys, O_RDONLY)) < 0 || readsb(0) == 0) 293 exit(3); /* Cannot read superblock */ 294 close(fsreadfd); 295 if ((sblock.fs_flags & FS_GJOURNAL) != 0) { 296 //printf("GJournaled file system detected on %s.\n", 297 // filesys); 298 if (sblock.fs_clean == 1) { 299 pwarn("FILE SYSTEM CLEAN; SKIPPING CHECKS\n"); 300 exit(0); 301 } 302 if ((sblock.fs_flags & (FS_UNCLEAN | FS_NEEDSFSCK)) == 0) { 303 gjournal_check(filesys); 304 if (chkdoreload(mntp) == 0) 305 exit(0); 306 exit(4); 307 } else { 308 pfatal( 309 "UNEXPECTED INCONSISTENCY, CANNOT RUN FAST FSCK\n"); 310 } 311 } 312 } 313 /* 314 * If we are to do a background check: 315 * Get the mount point information of the file system 316 * create snapshot file 317 * return created snapshot file 318 * if not found, clear bkgrdflag and proceed with normal fsck 319 */ 320 if (bkgrdflag) { 321 if (mntp == NULL) { 322 bkgrdflag = 0; 323 pfatal("NOT MOUNTED, CANNOT RUN IN BACKGROUND\n"); 324 } else if ((mntp->f_flags & MNT_SOFTDEP) == 0) { 325 bkgrdflag = 0; 326 pfatal( 327 "NOT USING SOFT UPDATES, CANNOT RUN IN BACKGROUND\n"); 328 } else if ((mntp->f_flags & MNT_RDONLY) != 0) { 329 bkgrdflag = 0; 330 pfatal("MOUNTED READ-ONLY, CANNOT RUN IN BACKGROUND\n"); 331 } else if ((fsreadfd = open(filesys, O_RDONLY)) >= 0) { 332 if (readsb(0) != 0) { 333 if (sblock.fs_flags & (FS_NEEDSFSCK | FS_SUJ)) { 334 bkgrdflag = 0; 335 pfatal( 336 "UNEXPECTED INCONSISTENCY, CANNOT RUN IN BACKGROUND\n"); 337 } 338 if ((sblock.fs_flags & FS_UNCLEAN) == 0 && 339 skipclean && ckclean) { 340 /* 341 * file system is clean; 342 * skip snapshot and report it clean 343 */ 344 pwarn( 345 "FILE SYSTEM CLEAN; SKIPPING CHECKS\n"); 346 goto clean; 347 } 348 } 349 close(fsreadfd); 350 } 351 if (bkgrdflag) { 352 snprintf(snapname, sizeof snapname, "%s/.snap", 353 mntp->f_mntonname); 354 if (stat(snapname, &snapdir) < 0) { 355 if (errno != ENOENT) { 356 bkgrdflag = 0; 357 pfatal( 358 "CANNOT FIND SNAPSHOT DIRECTORY %s: %s, CANNOT RUN IN BACKGROUND\n", 359 snapname, strerror(errno)); 360 } else if ((grp = getgrnam("operator")) == NULL || 361 mkdir(snapname, 0770) < 0 || 362 chown(snapname, -1, grp->gr_gid) < 0 || 363 chmod(snapname, 0770) < 0) { 364 bkgrdflag = 0; 365 pfatal( 366 "CANNOT CREATE SNAPSHOT DIRECTORY %s: %s, CANNOT RUN IN BACKGROUND\n", 367 snapname, strerror(errno)); 368 } 369 } else if (!S_ISDIR(snapdir.st_mode)) { 370 bkgrdflag = 0; 371 pfatal( 372 "%s IS NOT A DIRECTORY, CANNOT RUN IN BACKGROUND\n", 373 snapname); 374 } 375 } 376 if (bkgrdflag) { 377 snprintf(snapname, sizeof snapname, 378 "%s/.snap/fsck_snapshot", mntp->f_mntonname); 379 build_iovec(&iov, &iovlen, "fstype", "ffs", 4); 380 build_iovec(&iov, &iovlen, "from", snapname, 381 (size_t)-1); 382 build_iovec(&iov, &iovlen, "fspath", mntp->f_mntonname, 383 (size_t)-1); 384 build_iovec(&iov, &iovlen, "errmsg", errmsg, 385 sizeof(errmsg)); 386 build_iovec(&iov, &iovlen, "update", NULL, 0); 387 build_iovec(&iov, &iovlen, "snapshot", NULL, 0); 388 389 while (nmount(iov, iovlen, mntp->f_flags) < 0) { 390 if (errno == EEXIST && unlink(snapname) == 0) 391 continue; 392 bkgrdflag = 0; 393 pfatal("CANNOT CREATE SNAPSHOT %s: %s %s\n", 394 snapname, strerror(errno), errmsg); 395 break; 396 } 397 if (bkgrdflag != 0) 398 filesys = snapname; 399 } 400 } 401 402 switch (setup(filesys)) { 403 case 0: 404 if (preen) 405 pfatal("CAN'T CHECK FILE SYSTEM."); 406 return (0); 407 case -1: 408 clean: 409 pwarn("clean, %ld free ", (long)(sblock.fs_cstotal.cs_nffree + 410 sblock.fs_frag * sblock.fs_cstotal.cs_nbfree)); 411 printf("(%jd frags, %jd blocks, %.1f%% fragmentation)\n", 412 (intmax_t)sblock.fs_cstotal.cs_nffree, 413 (intmax_t)sblock.fs_cstotal.cs_nbfree, 414 sblock.fs_cstotal.cs_nffree * 100.0 / sblock.fs_dsize); 415 return (0); 416 } 417 /* 418 * Determine if we can and should do journal recovery. 419 */ 420 if ((sblock.fs_flags & FS_SUJ) == FS_SUJ) { 421 if ((sblock.fs_flags & FS_NEEDSFSCK) != FS_NEEDSFSCK && skipclean) { 422 if (preen || reply("USE JOURNAL")) { 423 if (suj_check(filesys) == 0) { 424 printf("\n***** FILE SYSTEM MARKED CLEAN *****\n"); 425 if (chkdoreload(mntp) == 0) 426 exit(0); 427 exit(4); 428 } 429 } 430 printf("** Skipping journal, falling through to full fsck\n\n"); 431 } 432 /* 433 * Write the superblock so we don't try to recover the 434 * journal on another pass. If this is the only change 435 * to the filesystem, we do not want it to be called 436 * out as modified. 437 */ 438 sblock.fs_mtime = time(NULL); 439 sbdirty(); 440 ofsmodified = fsmodified; 441 flush(fswritefd, &sblk); 442 fsmodified = ofsmodified; 443 } 444 /* 445 * If the filesystem was run on an old kernel that did not 446 * support check hashes, clear the check-hash flags so that 447 * we do not try to verify them. 448 */ 449 if ((sblock.fs_flags & FS_METACKHASH) == 0) 450 sblock.fs_metackhash = 0; 451 /* 452 * If we are running on a kernel that can provide check hashes 453 * that are not yet enabled for the filesystem and we are 454 * running manually without the -y flag, offer to add any 455 * supported check hashes that are not already enabled. 456 */ 457 ckhashadd = 0; 458 if (preen == 0 && yflag == 0 && sblock.fs_magic != FS_UFS1_MAGIC && 459 fswritefd != -1 && getosreldate() >= P_OSREL_CK_CYLGRP) { 460 if ((sblock.fs_metackhash & CK_CYLGRP) == 0 && 461 reply("ADD CYLINDER GROUP CHECK-HASH PROTECTION") != 0) { 462 ckhashadd |= CK_CYLGRP; 463 sblock.fs_metackhash |= CK_CYLGRP; 464 } 465 if ((sblock.fs_metackhash & CK_SUPERBLOCK) == 0 && 466 getosreldate() >= P_OSREL_CK_SUPERBLOCK && 467 reply("ADD SUPERBLOCK CHECK-HASH PROTECTION") != 0) { 468 ckhashadd |= CK_SUPERBLOCK; 469 sblock.fs_metackhash |= CK_SUPERBLOCK; 470 } 471 if ((sblock.fs_metackhash & CK_INODE) == 0 && 472 getosreldate() >= P_OSREL_CK_INODE && 473 reply("ADD INODE CHECK-HASH PROTECTION") != 0) { 474 ckhashadd |= CK_INODE; 475 sblock.fs_metackhash |= CK_INODE; 476 } 477 #ifdef notyet 478 if ((sblock.fs_metackhash & CK_INDIR) == 0 && 479 getosreldate() >= P_OSREL_CK_INDIR && 480 reply("ADD INDIRECT BLOCK CHECK-HASH PROTECTION") != 0) { 481 ckhashadd |= CK_INDIR; 482 sblock.fs_metackhash |= CK_INDIR; 483 } 484 if ((sblock.fs_metackhash & CK_DIR) == 0 && 485 getosreldate() >= P_OSREL_CK_DIR && 486 reply("ADD DIRECTORY CHECK-HASH PROTECTION") != 0) { 487 ckhashadd |= CK_DIR; 488 sblock.fs_metackhash |= CK_DIR; 489 } 490 #endif /* notyet */ 491 if (ckhashadd != 0) { 492 sblock.fs_flags |= FS_METACKHASH; 493 sbdirty(); 494 } 495 } 496 /* 497 * Cleared if any questions answered no. Used to decide if 498 * the superblock should be marked clean. 499 */ 500 resolved = 1; 501 /* 502 * 1: scan inodes tallying blocks used 503 */ 504 if (preen == 0) { 505 printf("** Last Mounted on %s\n", sblock.fs_fsmnt); 506 if (mntp != NULL && mntp->f_flags & MNT_ROOTFS) 507 printf("** Root file system\n"); 508 printf("** Phase 1 - Check Blocks and Sizes\n"); 509 } 510 clock_gettime(CLOCK_REALTIME_PRECISE, &startprog); 511 pass1(); 512 IOstats("Pass1"); 513 514 /* 515 * 1b: locate first references to duplicates, if any 516 */ 517 if (duplist) { 518 if (preen || usedsoftdep) 519 pfatal("INTERNAL ERROR: dups with %s%s%s", 520 preen ? "-p" : "", 521 (preen && usedsoftdep) ? " and " : "", 522 usedsoftdep ? "softupdates" : ""); 523 printf("** Phase 1b - Rescan For More DUPS\n"); 524 pass1b(); 525 IOstats("Pass1b"); 526 } 527 528 /* 529 * 2: traverse directories from root to mark all connected directories 530 */ 531 if (preen == 0) 532 printf("** Phase 2 - Check Pathnames\n"); 533 pass2(); 534 IOstats("Pass2"); 535 536 /* 537 * 3: scan inodes looking for disconnected directories 538 */ 539 if (preen == 0) 540 printf("** Phase 3 - Check Connectivity\n"); 541 pass3(); 542 IOstats("Pass3"); 543 544 /* 545 * 4: scan inodes looking for disconnected files; check reference counts 546 */ 547 if (preen == 0) 548 printf("** Phase 4 - Check Reference Counts\n"); 549 pass4(); 550 IOstats("Pass4"); 551 552 /* 553 * 5: check and repair resource counts in cylinder groups 554 */ 555 if (preen == 0) 556 printf("** Phase 5 - Check Cyl groups\n"); 557 pass5(); 558 IOstats("Pass5"); 559 560 /* 561 * print out summary statistics 562 */ 563 n_ffree = sblock.fs_cstotal.cs_nffree; 564 n_bfree = sblock.fs_cstotal.cs_nbfree; 565 files = maxino - UFS_ROOTINO - sblock.fs_cstotal.cs_nifree - n_files; 566 blks = n_blks + 567 sblock.fs_ncg * (cgdmin(&sblock, 0) - cgsblock(&sblock, 0)); 568 blks += cgsblock(&sblock, 0) - cgbase(&sblock, 0); 569 blks += howmany(sblock.fs_cssize, sblock.fs_fsize); 570 blks = maxfsblock - (n_ffree + sblock.fs_frag * n_bfree) - blks; 571 if (bkgrdflag && (files > 0 || blks > 0)) { 572 countdirs = sblock.fs_cstotal.cs_ndir - countdirs; 573 pwarn("Reclaimed: %ld directories, %jd files, %jd fragments\n", 574 countdirs, files - countdirs, blks); 575 } 576 pwarn("%ld files, %jd used, %ju free ", 577 (long)n_files, (intmax_t)n_blks, 578 (uintmax_t)n_ffree + sblock.fs_frag * n_bfree); 579 printf("(%ju frags, %ju blocks, %.1f%% fragmentation)\n", 580 (uintmax_t)n_ffree, (uintmax_t)n_bfree, 581 n_ffree * 100.0 / sblock.fs_dsize); 582 if (debug) { 583 if (files < 0) 584 printf("%jd inodes missing\n", -files); 585 if (blks < 0) 586 printf("%jd blocks missing\n", -blks); 587 if (duplist != NULL) { 588 printf("The following duplicate blocks remain:"); 589 for (dp = duplist; dp; dp = dp->next) 590 printf(" %jd,", (intmax_t)dp->dup); 591 printf("\n"); 592 } 593 } 594 duplist = (struct dups *)0; 595 muldup = (struct dups *)0; 596 inocleanup(); 597 if (fsmodified) { 598 sblock.fs_time = time(NULL); 599 sbdirty(); 600 } 601 if (cvtlevel && sblk.b_dirty) { 602 /* 603 * Write out the duplicate super blocks 604 */ 605 for (cylno = 0; cylno < sblock.fs_ncg; cylno++) 606 blwrite(fswritefd, (char *)&sblock, 607 fsbtodb(&sblock, cgsblock(&sblock, cylno)), 608 SBLOCKSIZE); 609 } 610 if (rerun) 611 resolved = 0; 612 finalIOstats(); 613 614 /* 615 * Check to see if the file system is mounted read-write. 616 */ 617 if (bkgrdflag == 0 && mntp != NULL && (mntp->f_flags & MNT_RDONLY) == 0) 618 resolved = 0; 619 ckfini(resolved); 620 621 for (cylno = 0; cylno < sblock.fs_ncg; cylno++) 622 if (inostathead[cylno].il_stat != NULL) 623 free((char *)inostathead[cylno].il_stat); 624 free((char *)inostathead); 625 inostathead = NULL; 626 if (fsmodified && !preen) 627 printf("\n***** FILE SYSTEM WAS MODIFIED *****\n"); 628 if (rerun) { 629 if (wantrestart && (restarts++ < 10) && 630 (preen || reply("RESTART"))) 631 return (ERESTART); 632 printf("\n***** PLEASE RERUN FSCK *****\n"); 633 } 634 if (chkdoreload(mntp) != 0) { 635 if (!fsmodified) 636 return (0); 637 if (!preen) 638 printf("\n***** REBOOT NOW *****\n"); 639 sync(); 640 return (4); 641 } 642 return (rerun ? ERERUN : 0); 643 } 644 645 static int 646 chkdoreload(struct statfs *mntp) 647 { 648 struct iovec *iov; 649 int iovlen; 650 char errmsg[255]; 651 652 if (mntp == NULL) 653 return (0); 654 655 iov = NULL; 656 iovlen = 0; 657 errmsg[0] = '\0'; 658 /* 659 * We modified a mounted file system. Do a mount update on 660 * it unless it is read-write, so we can continue using it 661 * as safely as possible. 662 */ 663 if (mntp->f_flags & MNT_RDONLY) { 664 build_iovec(&iov, &iovlen, "fstype", "ffs", 4); 665 build_iovec(&iov, &iovlen, "from", mntp->f_mntfromname, 666 (size_t)-1); 667 build_iovec(&iov, &iovlen, "fspath", mntp->f_mntonname, 668 (size_t)-1); 669 build_iovec(&iov, &iovlen, "errmsg", errmsg, 670 sizeof(errmsg)); 671 build_iovec(&iov, &iovlen, "update", NULL, 0); 672 build_iovec(&iov, &iovlen, "reload", NULL, 0); 673 /* 674 * XX: We need the following line until we clean up 675 * nmount parsing of root mounts and NFS root mounts. 676 */ 677 build_iovec(&iov, &iovlen, "ro", NULL, 0); 678 if (nmount(iov, iovlen, mntp->f_flags) == 0) { 679 return (0); 680 } 681 pwarn("mount reload of '%s' failed: %s %s\n\n", 682 mntp->f_mntonname, strerror(errno), errmsg); 683 return (1); 684 } 685 return (0); 686 } 687 688 /* 689 * Get the mount point information for name. 690 */ 691 static struct statfs * 692 getmntpt(const char *name) 693 { 694 struct stat devstat, mntdevstat; 695 char device[sizeof(_PATH_DEV) - 1 + MNAMELEN]; 696 char *ddevname; 697 struct statfs *mntbuf, *statfsp; 698 int i, mntsize, isdev; 699 700 if (stat(name, &devstat) != 0) 701 return (NULL); 702 if (S_ISCHR(devstat.st_mode) || S_ISBLK(devstat.st_mode)) 703 isdev = 1; 704 else 705 isdev = 0; 706 mntsize = getmntinfo(&mntbuf, MNT_NOWAIT); 707 for (i = 0; i < mntsize; i++) { 708 statfsp = &mntbuf[i]; 709 ddevname = statfsp->f_mntfromname; 710 if (*ddevname != '/') { 711 if (strlen(_PATH_DEV) + strlen(ddevname) + 1 > 712 sizeof(statfsp->f_mntfromname)) 713 continue; 714 strcpy(device, _PATH_DEV); 715 strcat(device, ddevname); 716 strcpy(statfsp->f_mntfromname, device); 717 } 718 if (isdev == 0) { 719 if (strcmp(name, statfsp->f_mntonname)) 720 continue; 721 return (statfsp); 722 } 723 if (stat(ddevname, &mntdevstat) == 0 && 724 mntdevstat.st_rdev == devstat.st_rdev) 725 return (statfsp); 726 } 727 statfsp = NULL; 728 return (statfsp); 729 } 730 731 static void 732 usage(void) 733 { 734 (void) fprintf(stderr, 735 "usage: %s [-BCdEFfnpRrSyZ] [-b block] [-c level] [-m mode] filesystem ...\n", 736 getprogname()); 737 exit(1); 738 } 739 740 void 741 infohandler(int sig __unused) 742 { 743 got_siginfo = 1; 744 } 745 746 void 747 alarmhandler(int sig __unused) 748 { 749 got_sigalarm = 1; 750 } 751