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 chkdoreload(struct statfs *mntp); 79 static struct statfs *getmntpt(const char *); 80 81 int 82 main(int argc, char *argv[]) 83 { 84 int ch; 85 struct rlimit rlimit; 86 struct itimerval itimerval; 87 int fsret; 88 int ret = 0; 89 90 sync(); 91 skipclean = 1; 92 inoopt = 0; 93 while ((ch = getopt(argc, argv, "b:Bc:CdEfFm:npRrSyZz")) != -1) { 94 switch (ch) { 95 case 'b': 96 skipclean = 0; 97 bflag = argtoimax('b', "number", optarg, 10); 98 printf("Alternate super block location: %jd\n", bflag); 99 break; 100 101 case 'B': 102 bkgrdflag = 1; 103 break; 104 105 case 'c': 106 skipclean = 0; 107 cvtlevel = argtoimax('c', "conversion level", optarg, 108 10); 109 if (cvtlevel < 3) 110 errx(EEXIT, "cannot do level %d conversion", 111 cvtlevel); 112 break; 113 114 case 'd': 115 debug++; 116 break; 117 118 case 'E': 119 Eflag++; 120 break; 121 122 case 'f': 123 skipclean = 0; 124 break; 125 126 case 'F': 127 bkgrdcheck = 1; 128 break; 129 130 case 'm': 131 lfmode = argtoimax('m', "mode", optarg, 8); 132 if (lfmode &~ 07777) 133 errx(EEXIT, "bad mode to -m: %o", lfmode); 134 printf("** lost+found creation mode %o\n", lfmode); 135 break; 136 137 case 'n': 138 nflag++; 139 yflag = 0; 140 break; 141 142 case 'p': 143 preen++; 144 /*FALLTHROUGH*/ 145 146 case 'C': 147 ckclean++; 148 break; 149 150 case 'R': 151 wantrestart = 1; 152 break; 153 case 'r': 154 inoopt++; 155 break; 156 157 case 'S': 158 surrender = 1; 159 break; 160 161 case 'y': 162 yflag++; 163 nflag = 0; 164 break; 165 166 case 'Z': 167 Zflag++; 168 break; 169 170 case 'z': 171 zflag++; 172 break; 173 174 default: 175 usage(); 176 } 177 } 178 argc -= optind; 179 argv += optind; 180 181 if (!argc) 182 usage(); 183 184 if (signal(SIGINT, SIG_IGN) != SIG_IGN) 185 (void)signal(SIGINT, catch); 186 if (ckclean) 187 (void)signal(SIGQUIT, catchquit); 188 signal(SIGINFO, infohandler); 189 if (bkgrdflag) { 190 signal(SIGALRM, alarmhandler); 191 itimerval.it_interval.tv_sec = 5; 192 itimerval.it_interval.tv_usec = 0; 193 itimerval.it_value.tv_sec = 5; 194 itimerval.it_value.tv_usec = 0; 195 setitimer(ITIMER_REAL, &itimerval, NULL); 196 } 197 /* 198 * Push up our allowed memory limit so we can cope 199 * with huge file systems. 200 */ 201 if (getrlimit(RLIMIT_DATA, &rlimit) == 0) { 202 rlimit.rlim_cur = rlimit.rlim_max; 203 (void)setrlimit(RLIMIT_DATA, &rlimit); 204 } 205 while (argc > 0) { 206 if ((fsret = checkfilesys(*argv)) == ERESTART) 207 continue; 208 ret |= fsret; 209 argc--; 210 argv++; 211 } 212 213 if (returntosingle) 214 ret = 2; 215 exit(ret); 216 } 217 218 static intmax_t 219 argtoimax(int flag, const char *req, const char *str, int base) 220 { 221 char *cp; 222 intmax_t ret; 223 224 ret = strtoimax(str, &cp, base); 225 if (cp == str || *cp) 226 errx(EEXIT, "-%c flag requires a %s", flag, req); 227 return (ret); 228 } 229 230 /* 231 * Check the specified file system. 232 */ 233 /* ARGSUSED */ 234 static int 235 checkfilesys(char *filesys) 236 { 237 ufs2_daddr_t n_ffree, n_bfree; 238 struct dups *dp; 239 struct statfs *mntp; 240 struct stat snapdir; 241 struct group *grp; 242 struct iovec *iov; 243 char errmsg[255]; 244 int ofsmodified; 245 int iovlen; 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 if (bkgrdflag == 0 && 299 (nflag || (fswritefd = open(filesys, O_WRONLY)) < 0)) { 300 fswritefd = -1; 301 if (preen) 302 pfatal("NO WRITE ACCESS"); 303 printf(" (NO WRITE)"); 304 } 305 if ((sblock.fs_flags & FS_GJOURNAL) != 0) { 306 if (sblock.fs_clean == 1) { 307 pwarn("FILE SYSTEM CLEAN; SKIPPING CHECKS\n"); 308 exit(0); 309 } 310 if ((sblock.fs_flags & (FS_UNCLEAN | FS_NEEDSFSCK)) == 0) { 311 bufinit(); 312 gjournal_check(filesys); 313 if (chkdoreload(mntp) == 0) 314 exit(0); 315 exit(4); 316 } else { 317 pfatal( 318 "UNEXPECTED INCONSISTENCY, CANNOT RUN FAST FSCK\n"); 319 } 320 } 321 close(fsreadfd); 322 close(fswritefd); 323 } 324 /* 325 * If we are to do a background check: 326 * Get the mount point information of the file system 327 * create snapshot file 328 * return created snapshot file 329 * if not found, clear bkgrdflag and proceed with normal fsck 330 */ 331 if (bkgrdflag) { 332 if (mntp == NULL) { 333 bkgrdflag = 0; 334 pfatal("NOT MOUNTED, CANNOT RUN IN BACKGROUND\n"); 335 } else if ((mntp->f_flags & MNT_SOFTDEP) == 0) { 336 bkgrdflag = 0; 337 pfatal( 338 "NOT USING SOFT UPDATES, CANNOT RUN IN BACKGROUND\n"); 339 } else if ((mntp->f_flags & MNT_RDONLY) != 0) { 340 bkgrdflag = 0; 341 pfatal("MOUNTED READ-ONLY, CANNOT RUN IN BACKGROUND\n"); 342 } else if ((fsreadfd = open(filesys, O_RDONLY)) >= 0) { 343 if (readsb(0) != 0) { 344 if (sblock.fs_flags & (FS_NEEDSFSCK | FS_SUJ)) { 345 bkgrdflag = 0; 346 pfatal( 347 "UNEXPECTED INCONSISTENCY, CANNOT RUN IN BACKGROUND\n"); 348 } 349 if ((sblock.fs_flags & FS_UNCLEAN) == 0 && 350 skipclean && ckclean) { 351 /* 352 * file system is clean; 353 * skip snapshot and report it clean 354 */ 355 pwarn( 356 "FILE SYSTEM CLEAN; SKIPPING CHECKS\n"); 357 goto clean; 358 } 359 } 360 close(fsreadfd); 361 } 362 if (bkgrdflag) { 363 snprintf(snapname, sizeof snapname, "%s/.snap", 364 mntp->f_mntonname); 365 if (stat(snapname, &snapdir) < 0) { 366 if (errno != ENOENT) { 367 bkgrdflag = 0; 368 pfatal( 369 "CANNOT FIND SNAPSHOT DIRECTORY %s: %s, CANNOT RUN IN BACKGROUND\n", 370 snapname, strerror(errno)); 371 } else if ((grp = getgrnam("operator")) == NULL || 372 mkdir(snapname, 0770) < 0 || 373 chown(snapname, -1, grp->gr_gid) < 0 || 374 chmod(snapname, 0770) < 0) { 375 bkgrdflag = 0; 376 pfatal( 377 "CANNOT CREATE SNAPSHOT DIRECTORY %s: %s, CANNOT RUN IN BACKGROUND\n", 378 snapname, strerror(errno)); 379 } 380 } else if (!S_ISDIR(snapdir.st_mode)) { 381 bkgrdflag = 0; 382 pfatal( 383 "%s IS NOT A DIRECTORY, CANNOT RUN IN BACKGROUND\n", 384 snapname); 385 } 386 } 387 if (bkgrdflag) { 388 snprintf(snapname, sizeof snapname, 389 "%s/.snap/fsck_snapshot", mntp->f_mntonname); 390 build_iovec(&iov, &iovlen, "fstype", "ffs", 4); 391 build_iovec(&iov, &iovlen, "from", snapname, 392 (size_t)-1); 393 build_iovec(&iov, &iovlen, "fspath", mntp->f_mntonname, 394 (size_t)-1); 395 build_iovec(&iov, &iovlen, "errmsg", errmsg, 396 sizeof(errmsg)); 397 build_iovec(&iov, &iovlen, "update", NULL, 0); 398 build_iovec(&iov, &iovlen, "snapshot", NULL, 0); 399 400 while (nmount(iov, iovlen, mntp->f_flags) < 0) { 401 if (errno == EEXIST && unlink(snapname) == 0) 402 continue; 403 bkgrdflag = 0; 404 pfatal("CANNOT CREATE SNAPSHOT %s: %s %s\n", 405 snapname, strerror(errno), errmsg); 406 break; 407 } 408 if (bkgrdflag != 0) 409 filesys = snapname; 410 } 411 } 412 413 switch (setup(filesys)) { 414 case 0: 415 if (preen) 416 pfatal("CAN'T CHECK FILE SYSTEM."); 417 return (EEXIT); 418 case -1: 419 clean: 420 pwarn("clean, %ld free ", (long)(sblock.fs_cstotal.cs_nffree + 421 sblock.fs_frag * sblock.fs_cstotal.cs_nbfree)); 422 printf("(%jd frags, %jd blocks, %.1f%% fragmentation)\n", 423 (intmax_t)sblock.fs_cstotal.cs_nffree, 424 (intmax_t)sblock.fs_cstotal.cs_nbfree, 425 sblock.fs_cstotal.cs_nffree * 100.0 / sblock.fs_dsize); 426 return (0); 427 } 428 /* 429 * Determine if we can and should do journal recovery. 430 */ 431 if ((sblock.fs_flags & FS_SUJ) == FS_SUJ) { 432 if ((sblock.fs_flags & FS_NEEDSFSCK) != FS_NEEDSFSCK && skipclean) { 433 sujrecovery = 1; 434 if (suj_check(filesys) == 0) { 435 printf("\n***** FILE SYSTEM MARKED CLEAN *****\n"); 436 if (chkdoreload(mntp) == 0) 437 exit(0); 438 exit(4); 439 } 440 sujrecovery = 0; 441 printf("** Skipping journal, falling through to full fsck\n\n"); 442 } 443 if (fswritefd != -1) { 444 /* 445 * Write the superblock so we don't try to recover the 446 * journal on another pass. If this is the only change 447 * to the filesystem, we do not want it to be called 448 * out as modified. 449 */ 450 sblock.fs_mtime = time(NULL); 451 sbdirty(); 452 ofsmodified = fsmodified; 453 flush(fswritefd, &sblk); 454 fsmodified = ofsmodified; 455 } 456 } 457 /* 458 * If the filesystem was run on an old kernel that did not 459 * support check hashes, clear the check-hash flags so that 460 * we do not try to verify them. 461 */ 462 if ((sblock.fs_flags & FS_METACKHASH) == 0) 463 sblock.fs_metackhash = 0; 464 /* 465 * If we are running on a kernel that can provide check hashes 466 * that are not yet enabled for the filesystem and we are 467 * running manually without the -y flag, offer to add any 468 * supported check hashes that are not already enabled. 469 */ 470 ckhashadd = 0; 471 if (preen == 0 && yflag == 0 && sblock.fs_magic != FS_UFS1_MAGIC && 472 fswritefd != -1 && getosreldate() >= P_OSREL_CK_CYLGRP) { 473 if ((sblock.fs_metackhash & CK_CYLGRP) == 0 && 474 reply("ADD CYLINDER GROUP CHECK-HASH PROTECTION") != 0) { 475 ckhashadd |= CK_CYLGRP; 476 sblock.fs_metackhash |= CK_CYLGRP; 477 } 478 if ((sblock.fs_metackhash & CK_SUPERBLOCK) == 0 && 479 getosreldate() >= P_OSREL_CK_SUPERBLOCK && 480 reply("ADD SUPERBLOCK CHECK-HASH PROTECTION") != 0) { 481 ckhashadd |= CK_SUPERBLOCK; 482 sblock.fs_metackhash |= CK_SUPERBLOCK; 483 } 484 if ((sblock.fs_metackhash & CK_INODE) == 0 && 485 getosreldate() >= P_OSREL_CK_INODE && 486 reply("ADD INODE CHECK-HASH PROTECTION") != 0) { 487 ckhashadd |= CK_INODE; 488 sblock.fs_metackhash |= CK_INODE; 489 } 490 #ifdef notyet 491 if ((sblock.fs_metackhash & CK_INDIR) == 0 && 492 getosreldate() >= P_OSREL_CK_INDIR && 493 reply("ADD INDIRECT BLOCK CHECK-HASH PROTECTION") != 0) { 494 ckhashadd |= CK_INDIR; 495 sblock.fs_metackhash |= CK_INDIR; 496 } 497 if ((sblock.fs_metackhash & CK_DIR) == 0 && 498 getosreldate() >= P_OSREL_CK_DIR && 499 reply("ADD DIRECTORY CHECK-HASH PROTECTION") != 0) { 500 ckhashadd |= CK_DIR; 501 sblock.fs_metackhash |= CK_DIR; 502 } 503 #endif /* notyet */ 504 if (ckhashadd != 0) { 505 sblock.fs_flags |= FS_METACKHASH; 506 sbdirty(); 507 } 508 } 509 /* 510 * Cleared if any questions answered no. Used to decide if 511 * the superblock should be marked clean. 512 */ 513 resolved = 1; 514 /* 515 * 1: scan inodes tallying blocks used 516 */ 517 if (preen == 0) { 518 printf("** Last Mounted on %s\n", sblock.fs_fsmnt); 519 if (mntp != NULL && mntp->f_flags & MNT_ROOTFS) 520 printf("** Root file system\n"); 521 printf("** Phase 1 - Check Blocks and Sizes\n"); 522 } 523 clock_gettime(CLOCK_REALTIME_PRECISE, &startprog); 524 pass1(); 525 IOstats("Pass1"); 526 527 /* 528 * 1b: locate first references to duplicates, if any 529 */ 530 if (duplist) { 531 if (preen || usedsoftdep) 532 pfatal("INTERNAL ERROR: dups with %s%s%s", 533 preen ? "-p" : "", 534 (preen && usedsoftdep) ? " and " : "", 535 usedsoftdep ? "softupdates" : ""); 536 printf("** Phase 1b - Rescan For More DUPS\n"); 537 pass1b(); 538 IOstats("Pass1b"); 539 } 540 541 /* 542 * 2: traverse directories from root to mark all connected directories 543 */ 544 if (preen == 0) 545 printf("** Phase 2 - Check Pathnames\n"); 546 pass2(); 547 IOstats("Pass2"); 548 549 /* 550 * 3: scan inodes looking for disconnected directories 551 */ 552 if (preen == 0) 553 printf("** Phase 3 - Check Connectivity\n"); 554 pass3(); 555 IOstats("Pass3"); 556 557 /* 558 * 4: scan inodes looking for disconnected files; check reference counts 559 */ 560 if (preen == 0) 561 printf("** Phase 4 - Check Reference Counts\n"); 562 pass4(); 563 IOstats("Pass4"); 564 565 /* 566 * 5: check and repair resource counts in cylinder groups 567 */ 568 if (preen == 0) 569 printf("** Phase 5 - Check Cyl groups\n"); 570 pass5(); 571 IOstats("Pass5"); 572 573 /* 574 * print out summary statistics 575 */ 576 n_ffree = sblock.fs_cstotal.cs_nffree; 577 n_bfree = sblock.fs_cstotal.cs_nbfree; 578 files = maxino - UFS_ROOTINO - sblock.fs_cstotal.cs_nifree - n_files; 579 blks = n_blks + 580 sblock.fs_ncg * (cgdmin(&sblock, 0) - cgsblock(&sblock, 0)); 581 blks += cgsblock(&sblock, 0) - cgbase(&sblock, 0); 582 blks += howmany(sblock.fs_cssize, sblock.fs_fsize); 583 blks = maxfsblock - (n_ffree + sblock.fs_frag * n_bfree) - blks; 584 if (bkgrdflag && (files > 0 || blks > 0)) { 585 countdirs = sblock.fs_cstotal.cs_ndir - countdirs; 586 pwarn("Reclaimed: %ld directories, %jd files, %jd fragments\n", 587 countdirs, files - countdirs, blks); 588 } 589 pwarn("%ld files, %jd used, %ju free ", 590 (long)n_files, (intmax_t)n_blks, 591 (uintmax_t)n_ffree + sblock.fs_frag * n_bfree); 592 printf("(%ju frags, %ju blocks, %.1f%% fragmentation)\n", 593 (uintmax_t)n_ffree, (uintmax_t)n_bfree, 594 n_ffree * 100.0 / sblock.fs_dsize); 595 if (debug) { 596 if (files < 0) 597 printf("%jd inodes missing\n", -files); 598 if (blks < 0) 599 printf("%jd blocks missing\n", -blks); 600 if (duplist != NULL) { 601 printf("The following duplicate blocks remain:"); 602 for (dp = duplist; dp; dp = dp->next) 603 printf(" %jd,", (intmax_t)dp->dup); 604 printf("\n"); 605 } 606 } 607 duplist = (struct dups *)0; 608 muldup = (struct dups *)0; 609 inocleanup(); 610 if (fsmodified) { 611 sblock.fs_time = time(NULL); 612 sbdirty(); 613 } 614 if (cvtlevel && (sblk.b_flags & B_DIRTY) != 0) { 615 /* 616 * Write out the duplicate super blocks 617 */ 618 if (sbput(fswritefd, &sblock, sblock.fs_ncg) == 0) 619 fsmodified = 1; 620 } 621 if (rerun) 622 resolved = 0; 623 624 /* 625 * Check to see if the file system is mounted read-write. 626 */ 627 if (bkgrdflag == 0 && mntp != NULL && (mntp->f_flags & MNT_RDONLY) == 0) 628 resolved = 0; 629 ckfini(resolved); 630 631 if (fsmodified && !preen) 632 printf("\n***** FILE SYSTEM WAS MODIFIED *****\n"); 633 if (rerun) { 634 if (wantrestart && (restarts++ < 10) && 635 (preen || reply("RESTART"))) 636 return (ERESTART); 637 printf("\n***** PLEASE RERUN FSCK *****\n"); 638 } 639 if (chkdoreload(mntp) != 0) { 640 if (!fsmodified) 641 return (0); 642 if (!preen) 643 printf("\n***** REBOOT NOW *****\n"); 644 sync(); 645 return (4); 646 } 647 return (rerun ? ERERUN : 0); 648 } 649 650 static int 651 chkdoreload(struct statfs *mntp) 652 { 653 struct iovec *iov; 654 int iovlen; 655 char errmsg[255]; 656 657 if (mntp == NULL) 658 return (0); 659 660 iov = NULL; 661 iovlen = 0; 662 errmsg[0] = '\0'; 663 /* 664 * We modified a mounted file system. Do a mount update on 665 * it unless it is read-write, so we can continue using it 666 * as safely as possible. 667 */ 668 if (mntp->f_flags & MNT_RDONLY) { 669 build_iovec(&iov, &iovlen, "fstype", "ffs", 4); 670 build_iovec(&iov, &iovlen, "from", mntp->f_mntfromname, 671 (size_t)-1); 672 build_iovec(&iov, &iovlen, "fspath", mntp->f_mntonname, 673 (size_t)-1); 674 build_iovec(&iov, &iovlen, "errmsg", errmsg, 675 sizeof(errmsg)); 676 build_iovec(&iov, &iovlen, "update", NULL, 0); 677 build_iovec(&iov, &iovlen, "reload", NULL, 0); 678 /* 679 * XX: We need the following line until we clean up 680 * nmount parsing of root mounts and NFS root mounts. 681 */ 682 build_iovec(&iov, &iovlen, "ro", NULL, 0); 683 if (nmount(iov, iovlen, mntp->f_flags) == 0) { 684 return (0); 685 } 686 pwarn("mount reload of '%s' failed: %s %s\n\n", 687 mntp->f_mntonname, strerror(errno), errmsg); 688 return (1); 689 } 690 return (0); 691 } 692 693 /* 694 * Get the mount point information for name. 695 */ 696 static struct statfs * 697 getmntpt(const char *name) 698 { 699 struct stat devstat, mntdevstat; 700 char device[sizeof(_PATH_DEV) - 1 + MNAMELEN]; 701 char *ddevname; 702 struct statfs *mntbuf, *statfsp; 703 int i, mntsize, isdev; 704 705 if (stat(name, &devstat) != 0) 706 return (NULL); 707 if (S_ISCHR(devstat.st_mode) || S_ISBLK(devstat.st_mode)) 708 isdev = 1; 709 else 710 isdev = 0; 711 mntsize = getmntinfo(&mntbuf, MNT_NOWAIT); 712 for (i = 0; i < mntsize; i++) { 713 statfsp = &mntbuf[i]; 714 ddevname = statfsp->f_mntfromname; 715 if (*ddevname != '/') { 716 if (strlen(_PATH_DEV) + strlen(ddevname) + 1 > 717 sizeof(statfsp->f_mntfromname)) 718 continue; 719 strcpy(device, _PATH_DEV); 720 strcat(device, ddevname); 721 strcpy(statfsp->f_mntfromname, device); 722 } 723 if (isdev == 0) { 724 if (strcmp(name, statfsp->f_mntonname)) 725 continue; 726 return (statfsp); 727 } 728 if (stat(ddevname, &mntdevstat) == 0 && 729 mntdevstat.st_rdev == devstat.st_rdev) 730 return (statfsp); 731 } 732 statfsp = NULL; 733 return (statfsp); 734 } 735 736 static void 737 usage(void) 738 { 739 (void) fprintf(stderr, 740 "usage: %s [-BCdEFfnpRrSyZ] [-b block] [-c level] [-m mode] filesystem ...\n", 741 getprogname()); 742 exit(1); 743 } 744 745 void 746 infohandler(int sig __unused) 747 { 748 got_siginfo = 1; 749 } 750 751 void 752 alarmhandler(int sig __unused) 753 { 754 got_sigalarm = 1; 755 } 756