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 /* 301 * Timespec operations (from <sys/time.h>). 302 */ 303 #define timespecsub(vvp, uvp) \ 304 do { \ 305 (vvp)->tv_sec -= (uvp)->tv_sec; \ 306 (vvp)->tv_nsec -= (uvp)->tv_nsec; \ 307 if ((vvp)->tv_nsec < 0) { \ 308 (vvp)->tv_sec--; \ 309 (vvp)->tv_nsec += 1000000000; \ 310 } \ 311 } while (0) 312 #define timespecadd(vvp, uvp) \ 313 do { \ 314 (vvp)->tv_sec += (uvp)->tv_sec; \ 315 (vvp)->tv_nsec += (uvp)->tv_nsec; \ 316 if ((vvp)->tv_nsec >= 1000000000) { \ 317 (vvp)->tv_sec++; \ 318 (vvp)->tv_nsec -= 1000000000; \ 319 } \ 320 } while (0) 321 322 void 323 getblk(struct bufarea *bp, ufs2_daddr_t blk, long size) 324 { 325 ufs2_daddr_t dblk; 326 struct timespec start, finish; 327 328 dblk = fsbtodb(&sblock, blk); 329 if (bp->b_bno == dblk) { 330 totalreads++; 331 } else { 332 flush(fswritefd, bp); 333 if (debug) { 334 readcnt[bp->b_type]++; 335 clock_gettime(CLOCK_REALTIME_PRECISE, &start); 336 } 337 bp->b_errs = blread(fsreadfd, bp->b_un.b_buf, dblk, size); 338 if (debug) { 339 clock_gettime(CLOCK_REALTIME_PRECISE, &finish); 340 timespecsub(&finish, &start); 341 timespecadd(&readtime[bp->b_type], &finish); 342 } 343 bp->b_bno = dblk; 344 bp->b_size = size; 345 } 346 } 347 348 void 349 flush(int fd, struct bufarea *bp) 350 { 351 352 if (!bp->b_dirty) 353 return; 354 bp->b_dirty = 0; 355 if (fswritefd < 0) { 356 pfatal("WRITING IN READ_ONLY MODE.\n"); 357 return; 358 } 359 if (bp->b_errs != 0) 360 pfatal("WRITING %sZERO'ED BLOCK %lld TO DISK\n", 361 (bp->b_errs == bp->b_size / dev_bsize) ? "" : "PARTIALLY ", 362 (long long)bp->b_bno); 363 bp->b_errs = 0; 364 /* 365 * Write using the appropriate function. 366 */ 367 switch (bp->b_type) { 368 case BT_SUPERBLK: 369 if (bp != &sblk) 370 pfatal("BUFFER %p DOES NOT MATCH SBLK %p\n", 371 bp, &sblk); 372 if (sbput(fd, (struct fs *)bp->b_un.b_buf, 0) == 0) 373 fsmodified = 1; 374 break; 375 case BT_CYLGRP: 376 if (cgput(&disk, (struct cg *)bp->b_un.b_buf) == 0) 377 fsmodified = 1; 378 break; 379 default: 380 blwrite(fd, bp->b_un.b_buf, bp->b_bno, bp->b_size); 381 break; 382 } 383 } 384 385 void 386 rwerror(const char *mesg, ufs2_daddr_t blk) 387 { 388 389 if (bkgrdcheck) 390 exit(EEXIT); 391 if (preen == 0) 392 printf("\n"); 393 pfatal("CANNOT %s: %ld", mesg, (long)blk); 394 if (reply("CONTINUE") == 0) 395 exit(EEXIT); 396 } 397 398 void 399 ckfini(int markclean) 400 { 401 struct bufarea *bp, *nbp; 402 int ofsmodified, cnt; 403 404 if (bkgrdflag) { 405 unlink(snapname); 406 if ((!(sblock.fs_flags & FS_UNCLEAN)) != markclean) { 407 cmd.value = FS_UNCLEAN; 408 cmd.size = markclean ? -1 : 1; 409 if (sysctlbyname("vfs.ffs.setflags", 0, 0, 410 &cmd, sizeof cmd) == -1) 411 rwerror("SET FILE SYSTEM FLAGS", FS_UNCLEAN); 412 if (!preen) { 413 printf("\n***** FILE SYSTEM MARKED %s *****\n", 414 markclean ? "CLEAN" : "DIRTY"); 415 if (!markclean) 416 rerun = 1; 417 } 418 } else if (!preen && !markclean) { 419 printf("\n***** FILE SYSTEM STILL DIRTY *****\n"); 420 rerun = 1; 421 } 422 } 423 if (debug && totalreads > 0) 424 printf("cache with %d buffers missed %ld of %ld (%d%%)\n", 425 numbufs, totaldiskreads, totalreads, 426 (int)(totaldiskreads * 100 / totalreads)); 427 if (fswritefd < 0) { 428 (void)close(fsreadfd); 429 return; 430 } 431 flush(fswritefd, &sblk); 432 if (havesb && cursnapshot == 0 && sblock.fs_magic == FS_UFS2_MAGIC && 433 sblk.b_bno != sblock.fs_sblockloc / dev_bsize && 434 !preen && reply("UPDATE STANDARD SUPERBLOCK")) { 435 /* Change the write destination to standard superblock */ 436 sblock.fs_sblockactualloc = sblock.fs_sblockloc; 437 sblk.b_bno = sblock.fs_sblockloc / dev_bsize; 438 sbdirty(); 439 flush(fswritefd, &sblk); 440 } 441 flush(fswritefd, &cgblk); 442 free(cgblk.b_un.b_buf); 443 cnt = 0; 444 TAILQ_FOREACH_REVERSE_SAFE(bp, &bufhead, buflist, b_list, nbp) { 445 TAILQ_REMOVE(&bufhead, bp, b_list); 446 cnt++; 447 flush(fswritefd, bp); 448 free(bp->b_un.b_buf); 449 free((char *)bp); 450 } 451 if (numbufs != cnt) 452 errx(EEXIT, "panic: lost %d buffers", numbufs - cnt); 453 if (cgbufs != NULL) { 454 for (cnt = 0; cnt < sblock.fs_ncg; cnt++) { 455 if (cgbufs[cnt].b_un.b_cg == NULL) 456 continue; 457 flush(fswritefd, &cgbufs[cnt]); 458 free(cgbufs[cnt].b_un.b_cg); 459 } 460 free(cgbufs); 461 } 462 pbp = pdirbp = (struct bufarea *)0; 463 if (cursnapshot == 0 && sblock.fs_clean != markclean) { 464 if ((sblock.fs_clean = markclean) != 0) { 465 sblock.fs_flags &= ~(FS_UNCLEAN | FS_NEEDSFSCK); 466 sblock.fs_pendingblocks = 0; 467 sblock.fs_pendinginodes = 0; 468 } 469 sbdirty(); 470 ofsmodified = fsmodified; 471 flush(fswritefd, &sblk); 472 fsmodified = ofsmodified; 473 if (!preen) { 474 printf("\n***** FILE SYSTEM MARKED %s *****\n", 475 markclean ? "CLEAN" : "DIRTY"); 476 if (!markclean) 477 rerun = 1; 478 } 479 } else if (!preen) { 480 if (markclean) { 481 printf("\n***** FILE SYSTEM IS CLEAN *****\n"); 482 } else { 483 printf("\n***** FILE SYSTEM STILL DIRTY *****\n"); 484 rerun = 1; 485 } 486 } 487 (void)close(fsreadfd); 488 (void)close(fswritefd); 489 } 490 491 /* 492 * Print out I/O statistics. 493 */ 494 void 495 IOstats(char *what) 496 { 497 int i; 498 499 if (debug == 0) 500 return; 501 if (diskreads == 0) { 502 printf("%s: no I/O\n\n", what); 503 return; 504 } 505 if (startpass.tv_sec == 0) 506 startpass = startprog; 507 printf("%s: I/O statistics\n", what); 508 printIOstats(); 509 totaldiskreads += diskreads; 510 diskreads = 0; 511 for (i = 0; i < BT_NUMBUFTYPES; i++) { 512 timespecadd(&totalreadtime[i], &readtime[i]); 513 totalreadcnt[i] += readcnt[i]; 514 readtime[i].tv_sec = readtime[i].tv_nsec = 0; 515 readcnt[i] = 0; 516 } 517 clock_gettime(CLOCK_REALTIME_PRECISE, &startpass); 518 } 519 520 void 521 finalIOstats(void) 522 { 523 int i; 524 525 if (debug == 0) 526 return; 527 printf("Final I/O statistics\n"); 528 totaldiskreads += diskreads; 529 diskreads = totaldiskreads; 530 startpass = startprog; 531 for (i = 0; i < BT_NUMBUFTYPES; i++) { 532 timespecadd(&totalreadtime[i], &readtime[i]); 533 totalreadcnt[i] += readcnt[i]; 534 readtime[i] = totalreadtime[i]; 535 readcnt[i] = totalreadcnt[i]; 536 } 537 printIOstats(); 538 } 539 540 static void printIOstats(void) 541 { 542 long long msec, totalmsec; 543 int i; 544 545 clock_gettime(CLOCK_REALTIME_PRECISE, &finishpass); 546 timespecsub(&finishpass, &startpass); 547 printf("Running time: %jd.%03ld sec\n", 548 (intmax_t)finishpass.tv_sec, finishpass.tv_nsec / 1000000); 549 printf("buffer reads by type:\n"); 550 for (totalmsec = 0, i = 0; i < BT_NUMBUFTYPES; i++) 551 totalmsec += readtime[i].tv_sec * 1000 + 552 readtime[i].tv_nsec / 1000000; 553 if (totalmsec == 0) 554 totalmsec = 1; 555 for (i = 0; i < BT_NUMBUFTYPES; i++) { 556 if (readcnt[i] == 0) 557 continue; 558 msec = 559 readtime[i].tv_sec * 1000 + readtime[i].tv_nsec / 1000000; 560 printf("%21s:%8ld %2ld.%ld%% %4jd.%03ld sec %2lld.%lld%%\n", 561 buftype[i], readcnt[i], readcnt[i] * 100 / diskreads, 562 (readcnt[i] * 1000 / diskreads) % 10, 563 (intmax_t)readtime[i].tv_sec, readtime[i].tv_nsec / 1000000, 564 msec * 100 / totalmsec, (msec * 1000 / totalmsec) % 10); 565 } 566 printf("\n"); 567 } 568 569 int 570 blread(int fd, char *buf, ufs2_daddr_t blk, long size) 571 { 572 char *cp; 573 int i, errs; 574 off_t offset; 575 576 offset = blk; 577 offset *= dev_bsize; 578 if (bkgrdflag) 579 slowio_start(); 580 totalreads++; 581 diskreads++; 582 if (lseek(fd, offset, 0) < 0) 583 rwerror("SEEK BLK", blk); 584 else if (read(fd, buf, (int)size) == size) { 585 if (bkgrdflag) 586 slowio_end(); 587 return (0); 588 } 589 590 /* 591 * This is handled specially here instead of in rwerror because 592 * rwerror is used for all sorts of errors, not just true read/write 593 * errors. It should be refactored and fixed. 594 */ 595 if (surrender) { 596 pfatal("CANNOT READ_BLK: %ld", (long)blk); 597 errx(EEXIT, "ABORTING DUE TO READ ERRORS"); 598 } else 599 rwerror("READ BLK", blk); 600 601 if (lseek(fd, offset, 0) < 0) 602 rwerror("SEEK BLK", blk); 603 errs = 0; 604 memset(buf, 0, (size_t)size); 605 printf("THE FOLLOWING DISK SECTORS COULD NOT BE READ:"); 606 for (cp = buf, i = 0; i < size; i += secsize, cp += secsize) { 607 if (read(fd, cp, (int)secsize) != secsize) { 608 (void)lseek(fd, offset + i + secsize, 0); 609 if (secsize != dev_bsize && dev_bsize != 1) 610 printf(" %jd (%jd),", 611 (intmax_t)(blk * dev_bsize + i) / secsize, 612 (intmax_t)blk + i / dev_bsize); 613 else 614 printf(" %jd,", (intmax_t)blk + i / dev_bsize); 615 errs++; 616 } 617 } 618 printf("\n"); 619 if (errs) 620 resolved = 0; 621 return (errs); 622 } 623 624 void 625 blwrite(int fd, char *buf, ufs2_daddr_t blk, ssize_t size) 626 { 627 int i; 628 char *cp; 629 off_t offset; 630 631 if (fd < 0) 632 return; 633 offset = blk; 634 offset *= dev_bsize; 635 if (lseek(fd, offset, 0) < 0) 636 rwerror("SEEK BLK", blk); 637 else if (write(fd, buf, size) == size) { 638 fsmodified = 1; 639 return; 640 } 641 resolved = 0; 642 rwerror("WRITE BLK", blk); 643 if (lseek(fd, offset, 0) < 0) 644 rwerror("SEEK BLK", blk); 645 printf("THE FOLLOWING SECTORS COULD NOT BE WRITTEN:"); 646 for (cp = buf, i = 0; i < size; i += dev_bsize, cp += dev_bsize) 647 if (write(fd, cp, dev_bsize) != dev_bsize) { 648 (void)lseek(fd, offset + i + dev_bsize, 0); 649 printf(" %jd,", (intmax_t)blk + i / dev_bsize); 650 } 651 printf("\n"); 652 return; 653 } 654 655 void 656 blerase(int fd, ufs2_daddr_t blk, long size) 657 { 658 off_t ioarg[2]; 659 660 if (fd < 0) 661 return; 662 ioarg[0] = blk * dev_bsize; 663 ioarg[1] = size; 664 ioctl(fd, DIOCGDELETE, ioarg); 665 /* we don't really care if we succeed or not */ 666 return; 667 } 668 669 /* 670 * Fill a contiguous region with all-zeroes. Note ZEROBUFSIZE is by 671 * definition a multiple of dev_bsize. 672 */ 673 void 674 blzero(int fd, ufs2_daddr_t blk, long size) 675 { 676 static char *zero; 677 off_t offset, len; 678 679 if (fd < 0) 680 return; 681 if (zero == NULL) { 682 zero = calloc(ZEROBUFSIZE, 1); 683 if (zero == NULL) 684 errx(EEXIT, "cannot allocate buffer pool"); 685 } 686 offset = blk * dev_bsize; 687 if (lseek(fd, offset, 0) < 0) 688 rwerror("SEEK BLK", blk); 689 while (size > 0) { 690 len = MIN(ZEROBUFSIZE, size); 691 if (write(fd, zero, len) != len) 692 rwerror("WRITE BLK", blk); 693 blk += len / dev_bsize; 694 size -= len; 695 } 696 } 697 698 /* 699 * Verify cylinder group's magic number and other parameters. If the 700 * test fails, offer an option to rebuild the whole cylinder group. 701 */ 702 int 703 check_cgmagic(int cg, struct bufarea *cgbp) 704 { 705 struct cg *cgp = cgbp->b_un.b_cg; 706 707 /* 708 * Extended cylinder group checks. 709 */ 710 if (cg_chkmagic(cgp) && 711 ((sblock.fs_magic == FS_UFS1_MAGIC && 712 cgp->cg_old_niblk == sblock.fs_ipg && 713 cgp->cg_ndblk <= sblock.fs_fpg && 714 cgp->cg_old_ncyl <= sblock.fs_old_cpg) || 715 (sblock.fs_magic == FS_UFS2_MAGIC && 716 cgp->cg_niblk == sblock.fs_ipg && 717 cgp->cg_ndblk <= sblock.fs_fpg && 718 cgp->cg_initediblk <= sblock.fs_ipg))) { 719 return (1); 720 } 721 pfatal("CYLINDER GROUP %d: BAD MAGIC NUMBER", cg); 722 if (!reply("REBUILD CYLINDER GROUP")) { 723 printf("YOU WILL NEED TO RERUN FSCK.\n"); 724 rerun = 1; 725 return (1); 726 } 727 /* 728 * Zero out the cylinder group and then initialize critical fields. 729 * Bit maps and summaries will be recalculated by later passes. 730 */ 731 memset(cgp, 0, (size_t)sblock.fs_cgsize); 732 cgp->cg_magic = CG_MAGIC; 733 cgp->cg_cgx = cg; 734 cgp->cg_niblk = sblock.fs_ipg; 735 cgp->cg_initediblk = MIN(sblock.fs_ipg, 2 * INOPB(&sblock)); 736 if (cgbase(&sblock, cg) + sblock.fs_fpg < sblock.fs_size) 737 cgp->cg_ndblk = sblock.fs_fpg; 738 else 739 cgp->cg_ndblk = sblock.fs_size - cgbase(&sblock, cg); 740 cgp->cg_iusedoff = &cgp->cg_space[0] - (u_char *)(&cgp->cg_firstfield); 741 if (sblock.fs_magic == FS_UFS1_MAGIC) { 742 cgp->cg_niblk = 0; 743 cgp->cg_initediblk = 0; 744 cgp->cg_old_ncyl = sblock.fs_old_cpg; 745 cgp->cg_old_niblk = sblock.fs_ipg; 746 cgp->cg_old_btotoff = cgp->cg_iusedoff; 747 cgp->cg_old_boff = cgp->cg_old_btotoff + 748 sblock.fs_old_cpg * sizeof(int32_t); 749 cgp->cg_iusedoff = cgp->cg_old_boff + 750 sblock.fs_old_cpg * sizeof(u_int16_t); 751 } 752 cgp->cg_freeoff = cgp->cg_iusedoff + howmany(sblock.fs_ipg, CHAR_BIT); 753 cgp->cg_nextfreeoff = cgp->cg_freeoff + howmany(sblock.fs_fpg,CHAR_BIT); 754 if (sblock.fs_contigsumsize > 0) { 755 cgp->cg_nclusterblks = cgp->cg_ndblk / sblock.fs_frag; 756 cgp->cg_clustersumoff = 757 roundup(cgp->cg_nextfreeoff, sizeof(u_int32_t)); 758 cgp->cg_clustersumoff -= sizeof(u_int32_t); 759 cgp->cg_clusteroff = cgp->cg_clustersumoff + 760 (sblock.fs_contigsumsize + 1) * sizeof(u_int32_t); 761 cgp->cg_nextfreeoff = cgp->cg_clusteroff + 762 howmany(fragstoblks(&sblock, sblock.fs_fpg), CHAR_BIT); 763 } 764 dirty(cgbp); 765 return (0); 766 } 767 768 /* 769 * allocate a data block with the specified number of fragments 770 */ 771 ufs2_daddr_t 772 allocblk(long frags) 773 { 774 int i, j, k, cg, baseblk; 775 struct bufarea *cgbp; 776 struct cg *cgp; 777 778 if (frags <= 0 || frags > sblock.fs_frag) 779 return (0); 780 for (i = 0; i < maxfsblock - sblock.fs_frag; i += sblock.fs_frag) { 781 for (j = 0; j <= sblock.fs_frag - frags; j++) { 782 if (testbmap(i + j)) 783 continue; 784 for (k = 1; k < frags; k++) 785 if (testbmap(i + j + k)) 786 break; 787 if (k < frags) { 788 j += k; 789 continue; 790 } 791 cg = dtog(&sblock, i + j); 792 cgbp = cglookup(cg); 793 cgp = cgbp->b_un.b_cg; 794 if (!check_cgmagic(cg, cgbp)) 795 return (0); 796 baseblk = dtogd(&sblock, i + j); 797 for (k = 0; k < frags; k++) { 798 setbmap(i + j + k); 799 clrbit(cg_blksfree(cgp), baseblk + k); 800 } 801 n_blks += frags; 802 if (frags == sblock.fs_frag) 803 cgp->cg_cs.cs_nbfree--; 804 else 805 cgp->cg_cs.cs_nffree -= frags; 806 dirty(cgbp); 807 return (i + j); 808 } 809 } 810 return (0); 811 } 812 813 /* 814 * Free a previously allocated block 815 */ 816 void 817 freeblk(ufs2_daddr_t blkno, long frags) 818 { 819 struct inodesc idesc; 820 821 idesc.id_blkno = blkno; 822 idesc.id_numfrags = frags; 823 (void)pass4check(&idesc); 824 } 825 826 /* Slow down IO so as to leave some disk bandwidth for other processes */ 827 void 828 slowio_start() 829 { 830 831 /* Delay one in every 8 operations */ 832 slowio_pollcnt = (slowio_pollcnt + 1) & 7; 833 if (slowio_pollcnt == 0) { 834 gettimeofday(&slowio_starttime, NULL); 835 } 836 } 837 838 void 839 slowio_end() 840 { 841 struct timeval tv; 842 int delay_usec; 843 844 if (slowio_pollcnt != 0) 845 return; 846 847 /* Update the slowdown interval. */ 848 gettimeofday(&tv, NULL); 849 delay_usec = (tv.tv_sec - slowio_starttime.tv_sec) * 1000000 + 850 (tv.tv_usec - slowio_starttime.tv_usec); 851 if (delay_usec < 64) 852 delay_usec = 64; 853 if (delay_usec > 2500000) 854 delay_usec = 2500000; 855 slowio_delay_usec = (slowio_delay_usec * 63 + delay_usec) >> 6; 856 /* delay by 8 times the average IO delay */ 857 if (slowio_delay_usec > 64) 858 usleep(slowio_delay_usec * 8); 859 } 860 861 /* 862 * Find a pathname 863 */ 864 void 865 getpathname(char *namebuf, ino_t curdir, ino_t ino) 866 { 867 int len; 868 char *cp; 869 struct inodesc idesc; 870 static int busy = 0; 871 872 if (curdir == ino && ino == UFS_ROOTINO) { 873 (void)strcpy(namebuf, "/"); 874 return; 875 } 876 if (busy || !INO_IS_DVALID(curdir)) { 877 (void)strcpy(namebuf, "?"); 878 return; 879 } 880 busy = 1; 881 memset(&idesc, 0, sizeof(struct inodesc)); 882 idesc.id_type = DATA; 883 idesc.id_fix = IGNORE; 884 cp = &namebuf[MAXPATHLEN - 1]; 885 *cp = '\0'; 886 if (curdir != ino) { 887 idesc.id_parent = curdir; 888 goto namelookup; 889 } 890 while (ino != UFS_ROOTINO) { 891 idesc.id_number = ino; 892 idesc.id_func = findino; 893 idesc.id_name = strdup(".."); 894 if ((ckinode(ginode(ino), &idesc) & FOUND) == 0) 895 break; 896 namelookup: 897 idesc.id_number = idesc.id_parent; 898 idesc.id_parent = ino; 899 idesc.id_func = findname; 900 idesc.id_name = namebuf; 901 if ((ckinode(ginode(idesc.id_number), &idesc)&FOUND) == 0) 902 break; 903 len = strlen(namebuf); 904 cp -= len; 905 memmove(cp, namebuf, (size_t)len); 906 *--cp = '/'; 907 if (cp < &namebuf[UFS_MAXNAMLEN]) 908 break; 909 ino = idesc.id_number; 910 } 911 busy = 0; 912 if (ino != UFS_ROOTINO) 913 *--cp = '?'; 914 memmove(namebuf, cp, (size_t)(&namebuf[MAXPATHLEN] - cp)); 915 } 916 917 void 918 catch(int sig __unused) 919 { 920 921 ckfini(0); 922 exit(12); 923 } 924 925 /* 926 * When preening, allow a single quit to signal 927 * a special exit after file system checks complete 928 * so that reboot sequence may be interrupted. 929 */ 930 void 931 catchquit(int sig __unused) 932 { 933 printf("returning to single-user after file system check\n"); 934 returntosingle = 1; 935 (void)signal(SIGQUIT, SIG_DFL); 936 } 937 938 /* 939 * determine whether an inode should be fixed. 940 */ 941 int 942 dofix(struct inodesc *idesc, const char *msg) 943 { 944 945 switch (idesc->id_fix) { 946 947 case DONTKNOW: 948 if (idesc->id_type == DATA) 949 direrror(idesc->id_number, msg); 950 else 951 pwarn("%s", msg); 952 if (preen) { 953 printf(" (SALVAGED)\n"); 954 idesc->id_fix = FIX; 955 return (ALTERED); 956 } 957 if (reply("SALVAGE") == 0) { 958 idesc->id_fix = NOFIX; 959 return (0); 960 } 961 idesc->id_fix = FIX; 962 return (ALTERED); 963 964 case FIX: 965 return (ALTERED); 966 967 case NOFIX: 968 case IGNORE: 969 return (0); 970 971 default: 972 errx(EEXIT, "UNKNOWN INODESC FIX MODE %d", idesc->id_fix); 973 } 974 /* NOTREACHED */ 975 return (0); 976 } 977 978 #include <stdarg.h> 979 980 /* 981 * An unexpected inconsistency occurred. 982 * Die if preening or file system is running with soft dependency protocol, 983 * otherwise just print message and continue. 984 */ 985 void 986 pfatal(const char *fmt, ...) 987 { 988 va_list ap; 989 va_start(ap, fmt); 990 if (!preen) { 991 (void)vfprintf(stdout, fmt, ap); 992 va_end(ap); 993 if (usedsoftdep) 994 (void)fprintf(stdout, 995 "\nUNEXPECTED SOFT UPDATE INCONSISTENCY\n"); 996 /* 997 * Force foreground fsck to clean up inconsistency. 998 */ 999 if (bkgrdflag) { 1000 cmd.value = FS_NEEDSFSCK; 1001 cmd.size = 1; 1002 if (sysctlbyname("vfs.ffs.setflags", 0, 0, 1003 &cmd, sizeof cmd) == -1) 1004 pwarn("CANNOT SET FS_NEEDSFSCK FLAG\n"); 1005 fprintf(stdout, "CANNOT RUN IN BACKGROUND\n"); 1006 ckfini(0); 1007 exit(EEXIT); 1008 } 1009 return; 1010 } 1011 if (cdevname == NULL) 1012 cdevname = strdup("fsck"); 1013 (void)fprintf(stdout, "%s: ", cdevname); 1014 (void)vfprintf(stdout, fmt, ap); 1015 (void)fprintf(stdout, 1016 "\n%s: UNEXPECTED%sINCONSISTENCY; RUN fsck MANUALLY.\n", 1017 cdevname, usedsoftdep ? " SOFT UPDATE " : " "); 1018 /* 1019 * Force foreground fsck to clean up inconsistency. 1020 */ 1021 if (bkgrdflag) { 1022 cmd.value = FS_NEEDSFSCK; 1023 cmd.size = 1; 1024 if (sysctlbyname("vfs.ffs.setflags", 0, 0, 1025 &cmd, sizeof cmd) == -1) 1026 pwarn("CANNOT SET FS_NEEDSFSCK FLAG\n"); 1027 } 1028 ckfini(0); 1029 exit(EEXIT); 1030 } 1031 1032 /* 1033 * Pwarn just prints a message when not preening or running soft dependency 1034 * protocol, or a warning (preceded by filename) when preening. 1035 */ 1036 void 1037 pwarn(const char *fmt, ...) 1038 { 1039 va_list ap; 1040 va_start(ap, fmt); 1041 if (preen) 1042 (void)fprintf(stdout, "%s: ", cdevname); 1043 (void)vfprintf(stdout, fmt, ap); 1044 va_end(ap); 1045 } 1046 1047 /* 1048 * Stub for routines from kernel. 1049 */ 1050 void 1051 panic(const char *fmt, ...) 1052 { 1053 va_list ap; 1054 va_start(ap, fmt); 1055 pfatal("INTERNAL INCONSISTENCY:"); 1056 (void)vfprintf(stdout, fmt, ap); 1057 va_end(ap); 1058 exit(EEXIT); 1059 } 1060