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 sccsid[] = "@(#)utilities.c 8.6 (Berkeley) 5/19/95"; 35 #endif /* not lint */ 36 #endif 37 #include <sys/cdefs.h> 38 __FBSDID("$FreeBSD$"); 39 40 #include <sys/param.h> 41 #include <sys/time.h> 42 #include <sys/types.h> 43 #include <sys/sysctl.h> 44 #include <sys/disk.h> 45 #include <sys/disklabel.h> 46 #include <sys/ioctl.h> 47 #include <sys/stat.h> 48 49 #include <ufs/ufs/dinode.h> 50 #include <ufs/ufs/dir.h> 51 #include <ufs/ffs/fs.h> 52 53 #include <err.h> 54 #include <errno.h> 55 #include <string.h> 56 #include <ctype.h> 57 #include <fstab.h> 58 #include <stdint.h> 59 #include <stdio.h> 60 #include <stdlib.h> 61 #include <time.h> 62 #include <unistd.h> 63 #include <libufs.h> 64 65 #include "fsck.h" 66 67 static void slowio_start(void); 68 static void slowio_end(void); 69 static void printIOstats(void); 70 71 static long diskreads, totaldiskreads, totalreads; /* Disk cache statistics */ 72 static struct timespec startpass, finishpass; 73 struct timeval slowio_starttime; 74 int slowio_delay_usec = 10000; /* Initial IO delay for background fsck */ 75 int slowio_pollcnt; 76 static struct bufarea cgblk; /* backup buffer for cylinder group blocks */ 77 static TAILQ_HEAD(buflist, bufarea) bufhead; /* head of buffer cache list */ 78 static int numbufs; /* size of buffer cache */ 79 static char *buftype[BT_NUMBUFTYPES] = BT_NAMES; 80 static struct bufarea *cgbufs; /* header for cylinder group cache */ 81 static int flushtries; /* number of tries to reclaim memory */ 82 83 void 84 fsutilinit(void) 85 { 86 diskreads = totaldiskreads = totalreads = 0; 87 bzero(&startpass, sizeof(struct timespec)); 88 bzero(&finishpass, sizeof(struct timespec)); 89 bzero(&slowio_starttime, sizeof(struct timeval)); 90 slowio_delay_usec = 10000; 91 slowio_pollcnt = 0; 92 bzero(&cgblk, sizeof(struct bufarea)); 93 TAILQ_INIT(&bufhead); 94 numbufs = 0; 95 /* buftype ? */ 96 cgbufs = NULL; 97 flushtries = 0; 98 } 99 100 int 101 ftypeok(union dinode *dp) 102 { 103 switch (DIP(dp, di_mode) & IFMT) { 104 105 case IFDIR: 106 case IFREG: 107 case IFBLK: 108 case IFCHR: 109 case IFLNK: 110 case IFSOCK: 111 case IFIFO: 112 return (1); 113 114 default: 115 if (debug) 116 printf("bad file type 0%o\n", DIP(dp, di_mode)); 117 return (0); 118 } 119 } 120 121 int 122 reply(const char *question) 123 { 124 int persevere; 125 char c; 126 127 if (preen) 128 pfatal("INTERNAL ERROR: GOT TO reply()"); 129 persevere = !strcmp(question, "CONTINUE"); 130 printf("\n"); 131 if (!persevere && (nflag || (fswritefd < 0 && bkgrdflag == 0))) { 132 printf("%s? no\n\n", question); 133 resolved = 0; 134 return (0); 135 } 136 if (yflag || (persevere && nflag)) { 137 printf("%s? yes\n\n", question); 138 return (1); 139 } 140 do { 141 printf("%s? [yn] ", question); 142 (void) fflush(stdout); 143 c = getc(stdin); 144 while (c != '\n' && getc(stdin) != '\n') { 145 if (feof(stdin)) { 146 resolved = 0; 147 return (0); 148 } 149 } 150 } while (c != 'y' && c != 'Y' && c != 'n' && c != 'N'); 151 printf("\n"); 152 if (c == 'y' || c == 'Y') 153 return (1); 154 resolved = 0; 155 return (0); 156 } 157 158 /* 159 * Look up state information for an inode. 160 */ 161 struct inostat * 162 inoinfo(ino_t inum) 163 { 164 static struct inostat unallocated = { USTATE, 0, 0 }; 165 struct inostatlist *ilp; 166 int iloff; 167 168 if (inum > maxino) 169 errx(EEXIT, "inoinfo: inumber %ju out of range", 170 (uintmax_t)inum); 171 ilp = &inostathead[inum / sblock.fs_ipg]; 172 iloff = inum % sblock.fs_ipg; 173 if (iloff >= ilp->il_numalloced) 174 return (&unallocated); 175 return (&ilp->il_stat[iloff]); 176 } 177 178 /* 179 * Malloc buffers and set up cache. 180 */ 181 void 182 bufinit(void) 183 { 184 struct bufarea *bp; 185 long bufcnt, i; 186 char *bufp; 187 188 pbp = pdirbp = (struct bufarea *)0; 189 bufp = Malloc((unsigned int)sblock.fs_bsize); 190 if (bufp == NULL) 191 errx(EEXIT, "cannot allocate buffer pool"); 192 cgblk.b_un.b_buf = bufp; 193 initbarea(&cgblk, BT_CYLGRP); 194 TAILQ_INIT(&bufhead); 195 bufcnt = MAXBUFS; 196 if (bufcnt < MINBUFS) 197 bufcnt = MINBUFS; 198 for (i = 0; i < bufcnt; i++) { 199 bp = (struct bufarea *)Malloc(sizeof(struct bufarea)); 200 bufp = Malloc((unsigned int)sblock.fs_bsize); 201 if (bp == NULL || bufp == NULL) { 202 if (i >= MINBUFS) 203 break; 204 errx(EEXIT, "cannot allocate buffer pool"); 205 } 206 bp->b_un.b_buf = bufp; 207 TAILQ_INSERT_HEAD(&bufhead, bp, b_list); 208 initbarea(bp, BT_UNKNOWN); 209 } 210 numbufs = i; /* save number of buffers */ 211 for (i = 0; i < BT_NUMBUFTYPES; i++) { 212 readtime[i].tv_sec = totalreadtime[i].tv_sec = 0; 213 readtime[i].tv_nsec = totalreadtime[i].tv_nsec = 0; 214 readcnt[i] = totalreadcnt[i] = 0; 215 } 216 } 217 218 /* 219 * Manage cylinder group buffers. 220 */ 221 static struct bufarea *cgbufs; /* header for cylinder group cache */ 222 static int flushtries; /* number of tries to reclaim memory */ 223 224 struct bufarea * 225 cglookup(int cg) 226 { 227 struct bufarea *cgbp; 228 struct cg *cgp; 229 230 if (cgbufs == NULL) { 231 cgbufs = calloc(sblock.fs_ncg, sizeof(struct bufarea)); 232 if (cgbufs == NULL) 233 errx(EEXIT, "cannot allocate cylinder group buffers"); 234 } 235 cgbp = &cgbufs[cg]; 236 if (cgbp->b_un.b_cg != NULL) 237 return (cgbp); 238 cgp = NULL; 239 if (flushtries == 0) 240 cgp = malloc((unsigned int)sblock.fs_cgsize); 241 if (cgp == NULL) { 242 getblk(&cgblk, cgtod(&sblock, cg), sblock.fs_cgsize); 243 return (&cgblk); 244 } 245 cgbp->b_un.b_cg = cgp; 246 initbarea(cgbp, BT_CYLGRP); 247 getblk(cgbp, cgtod(&sblock, cg), sblock.fs_cgsize); 248 return (cgbp); 249 } 250 251 /* 252 * Attempt to flush a cylinder group cache entry. 253 * Return whether the flush was successful. 254 */ 255 int 256 flushentry(void) 257 { 258 struct bufarea *cgbp; 259 260 if (flushtries == sblock.fs_ncg || cgbufs == NULL) 261 return (0); 262 cgbp = &cgbufs[flushtries++]; 263 if (cgbp->b_un.b_cg == NULL) 264 return (0); 265 flush(fswritefd, cgbp); 266 free(cgbp->b_un.b_buf); 267 cgbp->b_un.b_buf = NULL; 268 return (1); 269 } 270 271 /* 272 * Manage a cache of directory blocks. 273 */ 274 struct bufarea * 275 getdatablk(ufs2_daddr_t blkno, long size, int type) 276 { 277 struct bufarea *bp; 278 279 TAILQ_FOREACH(bp, &bufhead, b_list) 280 if (bp->b_bno == fsbtodb(&sblock, blkno)) 281 goto foundit; 282 TAILQ_FOREACH_REVERSE(bp, &bufhead, buflist, b_list) 283 if ((bp->b_flags & B_INUSE) == 0) 284 break; 285 if (bp == NULL) 286 errx(EEXIT, "deadlocked buffer pool"); 287 bp->b_type = type; 288 getblk(bp, blkno, size); 289 /* fall through */ 290 foundit: 291 if (debug && bp->b_type != type) 292 printf("Buffer type changed from %s to %s\n", 293 buftype[bp->b_type], buftype[type]); 294 TAILQ_REMOVE(&bufhead, bp, b_list); 295 TAILQ_INSERT_HEAD(&bufhead, bp, b_list); 296 bp->b_flags |= B_INUSE; 297 return (bp); 298 } 299 300 void 301 getblk(struct bufarea *bp, ufs2_daddr_t blk, long size) 302 { 303 ufs2_daddr_t dblk; 304 struct timespec start, finish; 305 306 dblk = fsbtodb(&sblock, blk); 307 if (bp->b_bno == dblk) { 308 totalreads++; 309 } else { 310 flush(fswritefd, bp); 311 if (debug) { 312 readcnt[bp->b_type]++; 313 clock_gettime(CLOCK_REALTIME_PRECISE, &start); 314 } 315 bp->b_errs = blread(fsreadfd, bp->b_un.b_buf, dblk, size); 316 if (debug) { 317 clock_gettime(CLOCK_REALTIME_PRECISE, &finish); 318 timespecsub(&finish, &start, &finish); 319 timespecadd(&readtime[bp->b_type], &finish, 320 &readtime[bp->b_type]); 321 } 322 bp->b_bno = dblk; 323 bp->b_size = size; 324 } 325 } 326 327 void 328 flush(int fd, struct bufarea *bp) 329 { 330 331 if (!bp->b_dirty) 332 return; 333 bp->b_dirty = 0; 334 if (fswritefd < 0) { 335 pfatal("WRITING IN READ_ONLY MODE.\n"); 336 return; 337 } 338 if (bp->b_errs != 0) 339 pfatal("WRITING %sZERO'ED BLOCK %lld TO DISK\n", 340 (bp->b_errs == bp->b_size / dev_bsize) ? "" : "PARTIALLY ", 341 (long long)bp->b_bno); 342 bp->b_errs = 0; 343 /* 344 * Write using the appropriate function. 345 */ 346 switch (bp->b_type) { 347 case BT_SUPERBLK: 348 if (bp != &sblk) 349 pfatal("BUFFER %p DOES NOT MATCH SBLK %p\n", 350 bp, &sblk); 351 if (sbput(fd, (struct fs *)bp->b_un.b_buf, 0) == 0) 352 fsmodified = 1; 353 break; 354 case BT_CYLGRP: 355 if (cgput(&disk, (struct cg *)bp->b_un.b_buf) == 0) 356 fsmodified = 1; 357 break; 358 default: 359 blwrite(fd, bp->b_un.b_buf, bp->b_bno, bp->b_size); 360 break; 361 } 362 } 363 364 void 365 rwerror(const char *mesg, ufs2_daddr_t blk) 366 { 367 368 if (bkgrdcheck) 369 exit(EEXIT); 370 if (preen == 0) 371 printf("\n"); 372 pfatal("CANNOT %s: %ld", mesg, (long)blk); 373 if (reply("CONTINUE") == 0) 374 exit(EEXIT); 375 } 376 377 void 378 ckfini(int markclean) 379 { 380 struct bufarea *bp, *nbp; 381 int ofsmodified, cnt; 382 383 if (bkgrdflag) { 384 unlink(snapname); 385 if ((!(sblock.fs_flags & FS_UNCLEAN)) != markclean) { 386 cmd.value = FS_UNCLEAN; 387 cmd.size = markclean ? -1 : 1; 388 if (sysctlbyname("vfs.ffs.setflags", 0, 0, 389 &cmd, sizeof cmd) == -1) 390 rwerror("SET FILE SYSTEM FLAGS", FS_UNCLEAN); 391 if (!preen) { 392 printf("\n***** FILE SYSTEM MARKED %s *****\n", 393 markclean ? "CLEAN" : "DIRTY"); 394 if (!markclean) 395 rerun = 1; 396 } 397 } else if (!preen && !markclean) { 398 printf("\n***** FILE SYSTEM STILL DIRTY *****\n"); 399 rerun = 1; 400 } 401 } 402 if (debug && totalreads > 0) 403 printf("cache with %d buffers missed %ld of %ld (%d%%)\n", 404 numbufs, totaldiskreads, totalreads, 405 (int)(totaldiskreads * 100 / totalreads)); 406 if (fswritefd < 0) { 407 (void)close(fsreadfd); 408 return; 409 } 410 flush(fswritefd, &sblk); 411 if (havesb && cursnapshot == 0 && sblock.fs_magic == FS_UFS2_MAGIC && 412 sblk.b_bno != sblock.fs_sblockloc / dev_bsize && 413 !preen && reply("UPDATE STANDARD SUPERBLOCK")) { 414 /* Change the write destination to standard superblock */ 415 sblock.fs_sblockactualloc = sblock.fs_sblockloc; 416 sblk.b_bno = sblock.fs_sblockloc / dev_bsize; 417 sbdirty(); 418 flush(fswritefd, &sblk); 419 } 420 flush(fswritefd, &cgblk); 421 free(cgblk.b_un.b_buf); 422 cnt = 0; 423 TAILQ_FOREACH_REVERSE_SAFE(bp, &bufhead, buflist, b_list, nbp) { 424 TAILQ_REMOVE(&bufhead, bp, b_list); 425 cnt++; 426 flush(fswritefd, bp); 427 free(bp->b_un.b_buf); 428 free((char *)bp); 429 } 430 if (numbufs != cnt) 431 errx(EEXIT, "panic: lost %d buffers", numbufs - cnt); 432 if (cgbufs != NULL) { 433 for (cnt = 0; cnt < sblock.fs_ncg; cnt++) { 434 if (cgbufs[cnt].b_un.b_cg == NULL) 435 continue; 436 flush(fswritefd, &cgbufs[cnt]); 437 free(cgbufs[cnt].b_un.b_cg); 438 } 439 free(cgbufs); 440 } 441 pbp = pdirbp = (struct bufarea *)0; 442 if (cursnapshot == 0 && sblock.fs_clean != markclean) { 443 if ((sblock.fs_clean = markclean) != 0) { 444 sblock.fs_flags &= ~(FS_UNCLEAN | FS_NEEDSFSCK); 445 sblock.fs_pendingblocks = 0; 446 sblock.fs_pendinginodes = 0; 447 } 448 sbdirty(); 449 ofsmodified = fsmodified; 450 flush(fswritefd, &sblk); 451 fsmodified = ofsmodified; 452 if (!preen) { 453 printf("\n***** FILE SYSTEM MARKED %s *****\n", 454 markclean ? "CLEAN" : "DIRTY"); 455 if (!markclean) 456 rerun = 1; 457 } 458 } else if (!preen) { 459 if (markclean) { 460 printf("\n***** FILE SYSTEM IS CLEAN *****\n"); 461 } else { 462 printf("\n***** FILE SYSTEM STILL DIRTY *****\n"); 463 rerun = 1; 464 } 465 } 466 (void)close(fsreadfd); 467 (void)close(fswritefd); 468 } 469 470 /* 471 * Print out I/O statistics. 472 */ 473 void 474 IOstats(char *what) 475 { 476 int i; 477 478 if (debug == 0) 479 return; 480 if (diskreads == 0) { 481 printf("%s: no I/O\n\n", what); 482 return; 483 } 484 if (startpass.tv_sec == 0) 485 startpass = startprog; 486 printf("%s: I/O statistics\n", what); 487 printIOstats(); 488 totaldiskreads += diskreads; 489 diskreads = 0; 490 for (i = 0; i < BT_NUMBUFTYPES; i++) { 491 timespecadd(&totalreadtime[i], &readtime[i], &totalreadtime[i]); 492 totalreadcnt[i] += readcnt[i]; 493 readtime[i].tv_sec = readtime[i].tv_nsec = 0; 494 readcnt[i] = 0; 495 } 496 clock_gettime(CLOCK_REALTIME_PRECISE, &startpass); 497 } 498 499 void 500 finalIOstats(void) 501 { 502 int i; 503 504 if (debug == 0) 505 return; 506 printf("Final I/O statistics\n"); 507 totaldiskreads += diskreads; 508 diskreads = totaldiskreads; 509 startpass = startprog; 510 for (i = 0; i < BT_NUMBUFTYPES; i++) { 511 timespecadd(&totalreadtime[i], &readtime[i], &totalreadtime[i]); 512 totalreadcnt[i] += readcnt[i]; 513 readtime[i] = totalreadtime[i]; 514 readcnt[i] = totalreadcnt[i]; 515 } 516 printIOstats(); 517 } 518 519 static void printIOstats(void) 520 { 521 long long msec, totalmsec; 522 int i; 523 524 clock_gettime(CLOCK_REALTIME_PRECISE, &finishpass); 525 timespecsub(&finishpass, &startpass, &finishpass); 526 printf("Running time: %jd.%03ld sec\n", 527 (intmax_t)finishpass.tv_sec, finishpass.tv_nsec / 1000000); 528 printf("buffer reads by type:\n"); 529 for (totalmsec = 0, i = 0; i < BT_NUMBUFTYPES; i++) 530 totalmsec += readtime[i].tv_sec * 1000 + 531 readtime[i].tv_nsec / 1000000; 532 if (totalmsec == 0) 533 totalmsec = 1; 534 for (i = 0; i < BT_NUMBUFTYPES; i++) { 535 if (readcnt[i] == 0) 536 continue; 537 msec = 538 readtime[i].tv_sec * 1000 + readtime[i].tv_nsec / 1000000; 539 printf("%21s:%8ld %2ld.%ld%% %4jd.%03ld sec %2lld.%lld%%\n", 540 buftype[i], readcnt[i], readcnt[i] * 100 / diskreads, 541 (readcnt[i] * 1000 / diskreads) % 10, 542 (intmax_t)readtime[i].tv_sec, readtime[i].tv_nsec / 1000000, 543 msec * 100 / totalmsec, (msec * 1000 / totalmsec) % 10); 544 } 545 printf("\n"); 546 } 547 548 int 549 blread(int fd, char *buf, ufs2_daddr_t blk, long size) 550 { 551 char *cp; 552 int i, errs; 553 off_t offset; 554 555 offset = blk; 556 offset *= dev_bsize; 557 if (bkgrdflag) 558 slowio_start(); 559 totalreads++; 560 diskreads++; 561 if (lseek(fd, offset, 0) < 0) 562 rwerror("SEEK BLK", blk); 563 else if (read(fd, buf, (int)size) == size) { 564 if (bkgrdflag) 565 slowio_end(); 566 return (0); 567 } 568 569 /* 570 * This is handled specially here instead of in rwerror because 571 * rwerror is used for all sorts of errors, not just true read/write 572 * errors. It should be refactored and fixed. 573 */ 574 if (surrender) { 575 pfatal("CANNOT READ_BLK: %ld", (long)blk); 576 errx(EEXIT, "ABORTING DUE TO READ ERRORS"); 577 } else 578 rwerror("READ BLK", blk); 579 580 if (lseek(fd, offset, 0) < 0) 581 rwerror("SEEK BLK", blk); 582 errs = 0; 583 memset(buf, 0, (size_t)size); 584 printf("THE FOLLOWING DISK SECTORS COULD NOT BE READ:"); 585 for (cp = buf, i = 0; i < size; i += secsize, cp += secsize) { 586 if (read(fd, cp, (int)secsize) != secsize) { 587 (void)lseek(fd, offset + i + secsize, 0); 588 if (secsize != dev_bsize && dev_bsize != 1) 589 printf(" %jd (%jd),", 590 (intmax_t)(blk * dev_bsize + i) / secsize, 591 (intmax_t)blk + i / dev_bsize); 592 else 593 printf(" %jd,", (intmax_t)blk + i / dev_bsize); 594 errs++; 595 } 596 } 597 printf("\n"); 598 if (errs) 599 resolved = 0; 600 return (errs); 601 } 602 603 void 604 blwrite(int fd, char *buf, ufs2_daddr_t blk, ssize_t size) 605 { 606 int i; 607 char *cp; 608 off_t offset; 609 610 if (fd < 0) 611 return; 612 offset = blk; 613 offset *= dev_bsize; 614 if (lseek(fd, offset, 0) < 0) 615 rwerror("SEEK BLK", blk); 616 else if (write(fd, buf, size) == size) { 617 fsmodified = 1; 618 return; 619 } 620 resolved = 0; 621 rwerror("WRITE BLK", blk); 622 if (lseek(fd, offset, 0) < 0) 623 rwerror("SEEK BLK", blk); 624 printf("THE FOLLOWING SECTORS COULD NOT BE WRITTEN:"); 625 for (cp = buf, i = 0; i < size; i += dev_bsize, cp += dev_bsize) 626 if (write(fd, cp, dev_bsize) != dev_bsize) { 627 (void)lseek(fd, offset + i + dev_bsize, 0); 628 printf(" %jd,", (intmax_t)blk + i / dev_bsize); 629 } 630 printf("\n"); 631 return; 632 } 633 634 void 635 blerase(int fd, ufs2_daddr_t blk, long size) 636 { 637 off_t ioarg[2]; 638 639 if (fd < 0) 640 return; 641 ioarg[0] = blk * dev_bsize; 642 ioarg[1] = size; 643 ioctl(fd, DIOCGDELETE, ioarg); 644 /* we don't really care if we succeed or not */ 645 return; 646 } 647 648 /* 649 * Fill a contiguous region with all-zeroes. Note ZEROBUFSIZE is by 650 * definition a multiple of dev_bsize. 651 */ 652 void 653 blzero(int fd, ufs2_daddr_t blk, long size) 654 { 655 static char *zero; 656 off_t offset, len; 657 658 if (fd < 0) 659 return; 660 if (zero == NULL) { 661 zero = calloc(ZEROBUFSIZE, 1); 662 if (zero == NULL) 663 errx(EEXIT, "cannot allocate buffer pool"); 664 } 665 offset = blk * dev_bsize; 666 if (lseek(fd, offset, 0) < 0) 667 rwerror("SEEK BLK", blk); 668 while (size > 0) { 669 len = MIN(ZEROBUFSIZE, size); 670 if (write(fd, zero, len) != len) 671 rwerror("WRITE BLK", blk); 672 blk += len / dev_bsize; 673 size -= len; 674 } 675 } 676 677 /* 678 * Verify cylinder group's magic number and other parameters. If the 679 * test fails, offer an option to rebuild the whole cylinder group. 680 */ 681 int 682 check_cgmagic(int cg, struct bufarea *cgbp) 683 { 684 struct cg *cgp = cgbp->b_un.b_cg; 685 686 /* 687 * Extended cylinder group checks. 688 */ 689 if (cg_chkmagic(cgp) && 690 ((sblock.fs_magic == FS_UFS1_MAGIC && 691 cgp->cg_old_niblk == sblock.fs_ipg && 692 cgp->cg_ndblk <= sblock.fs_fpg && 693 cgp->cg_old_ncyl <= sblock.fs_old_cpg) || 694 (sblock.fs_magic == FS_UFS2_MAGIC && 695 cgp->cg_niblk == sblock.fs_ipg && 696 cgp->cg_ndblk <= sblock.fs_fpg && 697 cgp->cg_initediblk <= sblock.fs_ipg))) { 698 return (1); 699 } 700 pfatal("CYLINDER GROUP %d: BAD MAGIC NUMBER", cg); 701 if (!reply("REBUILD CYLINDER GROUP")) { 702 printf("YOU WILL NEED TO RERUN FSCK.\n"); 703 rerun = 1; 704 return (1); 705 } 706 /* 707 * Zero out the cylinder group and then initialize critical fields. 708 * Bit maps and summaries will be recalculated by later passes. 709 */ 710 memset(cgp, 0, (size_t)sblock.fs_cgsize); 711 cgp->cg_magic = CG_MAGIC; 712 cgp->cg_cgx = cg; 713 cgp->cg_niblk = sblock.fs_ipg; 714 cgp->cg_initediblk = MIN(sblock.fs_ipg, 2 * INOPB(&sblock)); 715 if (cgbase(&sblock, cg) + sblock.fs_fpg < sblock.fs_size) 716 cgp->cg_ndblk = sblock.fs_fpg; 717 else 718 cgp->cg_ndblk = sblock.fs_size - cgbase(&sblock, cg); 719 cgp->cg_iusedoff = &cgp->cg_space[0] - (u_char *)(&cgp->cg_firstfield); 720 if (sblock.fs_magic == FS_UFS1_MAGIC) { 721 cgp->cg_niblk = 0; 722 cgp->cg_initediblk = 0; 723 cgp->cg_old_ncyl = sblock.fs_old_cpg; 724 cgp->cg_old_niblk = sblock.fs_ipg; 725 cgp->cg_old_btotoff = cgp->cg_iusedoff; 726 cgp->cg_old_boff = cgp->cg_old_btotoff + 727 sblock.fs_old_cpg * sizeof(int32_t); 728 cgp->cg_iusedoff = cgp->cg_old_boff + 729 sblock.fs_old_cpg * sizeof(u_int16_t); 730 } 731 cgp->cg_freeoff = cgp->cg_iusedoff + howmany(sblock.fs_ipg, CHAR_BIT); 732 cgp->cg_nextfreeoff = cgp->cg_freeoff + howmany(sblock.fs_fpg,CHAR_BIT); 733 if (sblock.fs_contigsumsize > 0) { 734 cgp->cg_nclusterblks = cgp->cg_ndblk / sblock.fs_frag; 735 cgp->cg_clustersumoff = 736 roundup(cgp->cg_nextfreeoff, sizeof(u_int32_t)); 737 cgp->cg_clustersumoff -= sizeof(u_int32_t); 738 cgp->cg_clusteroff = cgp->cg_clustersumoff + 739 (sblock.fs_contigsumsize + 1) * sizeof(u_int32_t); 740 cgp->cg_nextfreeoff = cgp->cg_clusteroff + 741 howmany(fragstoblks(&sblock, sblock.fs_fpg), CHAR_BIT); 742 } 743 dirty(cgbp); 744 return (0); 745 } 746 747 /* 748 * allocate a data block with the specified number of fragments 749 */ 750 ufs2_daddr_t 751 allocblk(long frags) 752 { 753 int i, j, k, cg, baseblk; 754 struct bufarea *cgbp; 755 struct cg *cgp; 756 757 if (frags <= 0 || frags > sblock.fs_frag) 758 return (0); 759 for (i = 0; i < maxfsblock - sblock.fs_frag; i += sblock.fs_frag) { 760 for (j = 0; j <= sblock.fs_frag - frags; j++) { 761 if (testbmap(i + j)) 762 continue; 763 for (k = 1; k < frags; k++) 764 if (testbmap(i + j + k)) 765 break; 766 if (k < frags) { 767 j += k; 768 continue; 769 } 770 cg = dtog(&sblock, i + j); 771 cgbp = cglookup(cg); 772 cgp = cgbp->b_un.b_cg; 773 if (!check_cgmagic(cg, cgbp)) 774 return (0); 775 baseblk = dtogd(&sblock, i + j); 776 for (k = 0; k < frags; k++) { 777 setbmap(i + j + k); 778 clrbit(cg_blksfree(cgp), baseblk + k); 779 } 780 n_blks += frags; 781 if (frags == sblock.fs_frag) 782 cgp->cg_cs.cs_nbfree--; 783 else 784 cgp->cg_cs.cs_nffree -= frags; 785 dirty(cgbp); 786 return (i + j); 787 } 788 } 789 return (0); 790 } 791 792 /* 793 * Free a previously allocated block 794 */ 795 void 796 freeblk(ufs2_daddr_t blkno, long frags) 797 { 798 struct inodesc idesc; 799 800 idesc.id_blkno = blkno; 801 idesc.id_numfrags = frags; 802 (void)pass4check(&idesc); 803 } 804 805 /* Slow down IO so as to leave some disk bandwidth for other processes */ 806 void 807 slowio_start() 808 { 809 810 /* Delay one in every 8 operations */ 811 slowio_pollcnt = (slowio_pollcnt + 1) & 7; 812 if (slowio_pollcnt == 0) { 813 gettimeofday(&slowio_starttime, NULL); 814 } 815 } 816 817 void 818 slowio_end() 819 { 820 struct timeval tv; 821 int delay_usec; 822 823 if (slowio_pollcnt != 0) 824 return; 825 826 /* Update the slowdown interval. */ 827 gettimeofday(&tv, NULL); 828 delay_usec = (tv.tv_sec - slowio_starttime.tv_sec) * 1000000 + 829 (tv.tv_usec - slowio_starttime.tv_usec); 830 if (delay_usec < 64) 831 delay_usec = 64; 832 if (delay_usec > 2500000) 833 delay_usec = 2500000; 834 slowio_delay_usec = (slowio_delay_usec * 63 + delay_usec) >> 6; 835 /* delay by 8 times the average IO delay */ 836 if (slowio_delay_usec > 64) 837 usleep(slowio_delay_usec * 8); 838 } 839 840 /* 841 * Find a pathname 842 */ 843 void 844 getpathname(char *namebuf, ino_t curdir, ino_t ino) 845 { 846 int len; 847 char *cp; 848 struct inodesc idesc; 849 static int busy = 0; 850 851 if (curdir == ino && ino == UFS_ROOTINO) { 852 (void)strcpy(namebuf, "/"); 853 return; 854 } 855 if (busy || !INO_IS_DVALID(curdir)) { 856 (void)strcpy(namebuf, "?"); 857 return; 858 } 859 busy = 1; 860 memset(&idesc, 0, sizeof(struct inodesc)); 861 idesc.id_type = DATA; 862 idesc.id_fix = IGNORE; 863 cp = &namebuf[MAXPATHLEN - 1]; 864 *cp = '\0'; 865 if (curdir != ino) { 866 idesc.id_parent = curdir; 867 goto namelookup; 868 } 869 while (ino != UFS_ROOTINO) { 870 idesc.id_number = ino; 871 idesc.id_func = findino; 872 idesc.id_name = strdup(".."); 873 if ((ckinode(ginode(ino), &idesc) & FOUND) == 0) 874 break; 875 namelookup: 876 idesc.id_number = idesc.id_parent; 877 idesc.id_parent = ino; 878 idesc.id_func = findname; 879 idesc.id_name = namebuf; 880 if ((ckinode(ginode(idesc.id_number), &idesc)&FOUND) == 0) 881 break; 882 len = strlen(namebuf); 883 cp -= len; 884 memmove(cp, namebuf, (size_t)len); 885 *--cp = '/'; 886 if (cp < &namebuf[UFS_MAXNAMLEN]) 887 break; 888 ino = idesc.id_number; 889 } 890 busy = 0; 891 if (ino != UFS_ROOTINO) 892 *--cp = '?'; 893 memmove(namebuf, cp, (size_t)(&namebuf[MAXPATHLEN] - cp)); 894 } 895 896 void 897 catch(int sig __unused) 898 { 899 900 ckfini(0); 901 exit(12); 902 } 903 904 /* 905 * When preening, allow a single quit to signal 906 * a special exit after file system checks complete 907 * so that reboot sequence may be interrupted. 908 */ 909 void 910 catchquit(int sig __unused) 911 { 912 printf("returning to single-user after file system check\n"); 913 returntosingle = 1; 914 (void)signal(SIGQUIT, SIG_DFL); 915 } 916 917 /* 918 * determine whether an inode should be fixed. 919 */ 920 int 921 dofix(struct inodesc *idesc, const char *msg) 922 { 923 924 switch (idesc->id_fix) { 925 926 case DONTKNOW: 927 if (idesc->id_type == DATA) 928 direrror(idesc->id_number, msg); 929 else 930 pwarn("%s", msg); 931 if (preen) { 932 printf(" (SALVAGED)\n"); 933 idesc->id_fix = FIX; 934 return (ALTERED); 935 } 936 if (reply("SALVAGE") == 0) { 937 idesc->id_fix = NOFIX; 938 return (0); 939 } 940 idesc->id_fix = FIX; 941 return (ALTERED); 942 943 case FIX: 944 return (ALTERED); 945 946 case NOFIX: 947 case IGNORE: 948 return (0); 949 950 default: 951 errx(EEXIT, "UNKNOWN INODESC FIX MODE %d", idesc->id_fix); 952 } 953 /* NOTREACHED */ 954 return (0); 955 } 956 957 #include <stdarg.h> 958 959 /* 960 * An unexpected inconsistency occurred. 961 * Die if preening or file system is running with soft dependency protocol, 962 * otherwise just print message and continue. 963 */ 964 void 965 pfatal(const char *fmt, ...) 966 { 967 va_list ap; 968 va_start(ap, fmt); 969 if (!preen) { 970 (void)vfprintf(stdout, fmt, ap); 971 va_end(ap); 972 if (usedsoftdep) 973 (void)fprintf(stdout, 974 "\nUNEXPECTED SOFT UPDATE INCONSISTENCY\n"); 975 /* 976 * Force foreground fsck to clean up inconsistency. 977 */ 978 if (bkgrdflag) { 979 cmd.value = FS_NEEDSFSCK; 980 cmd.size = 1; 981 if (sysctlbyname("vfs.ffs.setflags", 0, 0, 982 &cmd, sizeof cmd) == -1) 983 pwarn("CANNOT SET FS_NEEDSFSCK FLAG\n"); 984 fprintf(stdout, "CANNOT RUN IN BACKGROUND\n"); 985 ckfini(0); 986 exit(EEXIT); 987 } 988 return; 989 } 990 if (cdevname == NULL) 991 cdevname = strdup("fsck"); 992 (void)fprintf(stdout, "%s: ", cdevname); 993 (void)vfprintf(stdout, fmt, ap); 994 (void)fprintf(stdout, 995 "\n%s: UNEXPECTED%sINCONSISTENCY; RUN fsck MANUALLY.\n", 996 cdevname, usedsoftdep ? " SOFT UPDATE " : " "); 997 /* 998 * Force foreground fsck to clean up inconsistency. 999 */ 1000 if (bkgrdflag) { 1001 cmd.value = FS_NEEDSFSCK; 1002 cmd.size = 1; 1003 if (sysctlbyname("vfs.ffs.setflags", 0, 0, 1004 &cmd, sizeof cmd) == -1) 1005 pwarn("CANNOT SET FS_NEEDSFSCK FLAG\n"); 1006 } 1007 ckfini(0); 1008 exit(EEXIT); 1009 } 1010 1011 /* 1012 * Pwarn just prints a message when not preening or running soft dependency 1013 * protocol, or a warning (preceded by filename) when preening. 1014 */ 1015 void 1016 pwarn(const char *fmt, ...) 1017 { 1018 va_list ap; 1019 va_start(ap, fmt); 1020 if (preen) 1021 (void)fprintf(stdout, "%s: ", cdevname); 1022 (void)vfprintf(stdout, fmt, ap); 1023 va_end(ap); 1024 } 1025 1026 /* 1027 * Stub for routines from kernel. 1028 */ 1029 void 1030 panic(const char *fmt, ...) 1031 { 1032 va_list ap; 1033 va_start(ap, fmt); 1034 pfatal("INTERNAL INCONSISTENCY:"); 1035 (void)vfprintf(stdout, fmt, ap); 1036 va_end(ap); 1037 exit(EEXIT); 1038 } 1039