sbin/fsck_ffs/fsutil.c

   1 /*
   2  * Copyright (c) 1980, 1986, 1993
   3  *      The Regents of the University of California.  All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  * 4. Neither the name of the University nor the names of its contributors
  14  *    may be used to endorse or promote products derived from this software
  15  *    without specific prior written permission.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  27  * SUCH DAMAGE.
  28  */
  29
  30 #if 0
  31 #ifndef lint
  32 static const char sccsid[] = "@(#)utilities.c   8.6 (Berkeley) 5/19/95";
  33 #endif /* not lint */
  34 #endif
  35 #include <sys/cdefs.h>
  36 __FBSDID("$FreeBSD$");
  37
  38 #include <sys/param.h>
  39 #include <sys/time.h>
  40 #include <sys/types.h>
  41 #include <sys/sysctl.h>
  42 #include <sys/disk.h>
  43 #include <sys/disklabel.h>
  44 #include <sys/ioctl.h>
  45 #include <sys/stat.h>
  46
  47 #include <ufs/ufs/dinode.h>
  48 #include <ufs/ufs/dir.h>
  49 #include <ufs/ffs/fs.h>
  50
  51 #include <err.h>
  52 #include <errno.h>
  53 #include <string.h>
  54 #include <ctype.h>
  55 #include <fstab.h>
  56 #include <stdint.h>
  57 #include <stdio.h>
  58 #include <stdlib.h>
  59 #include <time.h>
  60 #include <unistd.h>
  61
  62 #include "fsck.h"
  63
  64 static void slowio_start(void);
  65 static void slowio_end(void);
  66 static void printIOstats(void);
  67
  68 static long diskreads, totaldiskreads, totalreads; /* Disk cache statistics */
  69 static struct timespec startpass, finishpass;
  70 struct timeval slowio_starttime;
  71 int slowio_delay_usec = 10000;  /* Initial IO delay for background fsck */
  72 int slowio_pollcnt;
  73 static struct bufarea cgblk;    /* backup buffer for cylinder group blocks */
  74 static TAILQ_HEAD(buflist, bufarea) bufhead;    /* head of buffer cache list */
  75 static int numbufs;                             /* size of buffer cache */
  76 static char *buftype[BT_NUMBUFTYPES] = BT_NAMES;
  77 static struct bufarea *cgbufs;  /* header for cylinder group cache */
  78 static int flushtries;          /* number of tries to reclaim memory */
  79
  80 void
  81 fsutilinit(void)
  82 {
  83         diskreads = totaldiskreads = totalreads = 0;
  84         bzero(&startpass, sizeof(struct timespec));
  85         bzero(&finishpass, sizeof(struct timespec));
  86         bzero(&slowio_starttime, sizeof(struct timeval));
  87         slowio_delay_usec = 10000;
  88         slowio_pollcnt = 0;
  89         bzero(&cgblk, sizeof(struct bufarea));
  90         TAILQ_INIT(&bufhead);
  91         numbufs = 0;
  92         /* buftype ? */
  93         cgbufs = NULL;
  94         flushtries = 0;
  95 }
  96
  97 int
  98 ftypeok(union dinode *dp)
  99 {
 100         switch (DIP(dp, di_mode) & IFMT) {
 101
 102         case IFDIR:
 103         case IFREG:
 104         case IFBLK:
 105         case IFCHR:
 106         case IFLNK:
 107         case IFSOCK:
 108         case IFIFO:
 109                 return (1);
 110
 111         default:
 112                 if (debug)
 113                         printf("bad file type 0%o\n", DIP(dp, di_mode));
 114                 return (0);
 115         }
 116 }
 117
 118 int
 119 reply(const char *question)
 120 {
 121         int persevere;
 122         char c;
 123
 124         if (preen)
 125                 pfatal("INTERNAL ERROR: GOT TO reply()");
 126         persevere = !strcmp(question, "CONTINUE");
 127         printf("\n");
 128         if (!persevere && (nflag || (fswritefd < 0 && bkgrdflag == 0))) {
 129                 printf("%s? no\n\n", question);
 130                 resolved = 0;
 131                 return (0);
 132         }
 133         if (yflag || (persevere && nflag)) {
 134                 printf("%s? yes\n\n", question);
 135                 return (1);
 136         }
 137         do      {
 138                 printf("%s? [yn] ", question);
 139                 (void) fflush(stdout);
 140                 c = getc(stdin);
 141                 while (c != '\n' && getc(stdin) != '\n') {
 142                         if (feof(stdin)) {
 143                                 resolved = 0;
 144                                 return (0);
 145                         }
 146                 }
 147         } while (c != 'y' && c != 'Y' && c != 'n' && c != 'N');
 148         printf("\n");
 149         if (c == 'y' || c == 'Y')
 150                 return (1);
 151         resolved = 0;
 152         return (0);
 153 }
 154
 155 /*
 156  * Look up state information for an inode.
 157  */
 158 struct inostat *
 159 inoinfo(ino_t inum)
 160 {
 161         static struct inostat unallocated = { USTATE, 0, 0 };
 162         struct inostatlist *ilp;
 163         int iloff;
 164
 165         if (inum > maxino)
 166                 errx(EEXIT, "inoinfo: inumber %ju out of range",
 167                     (uintmax_t)inum);
 168         ilp = &inostathead[inum / sblock.fs_ipg];
 169         iloff = inum % sblock.fs_ipg;
 170         if (iloff >= ilp->il_numalloced)
 171                 return (&unallocated);
 172         return (&ilp->il_stat[iloff]);
 173 }
 174
 175 /*
 176  * Malloc buffers and set up cache.
 177  */
 178 void
 179 bufinit(void)
 180 {
 181         struct bufarea *bp;
 182         long bufcnt, i;
 183         char *bufp;
 184
 185         pbp = pdirbp = (struct bufarea *)0;
 186         bufp = Malloc((unsigned int)sblock.fs_bsize);
 187         if (bufp == 0)
 188                 errx(EEXIT, "cannot allocate buffer pool");
 189         cgblk.b_un.b_buf = bufp;
 190         initbarea(&cgblk, BT_CYLGRP);
 191         TAILQ_INIT(&bufhead);
 192         bufcnt = MAXBUFS;
 193         if (bufcnt < MINBUFS)
 194                 bufcnt = MINBUFS;
 195         for (i = 0; i < bufcnt; i++) {
 196                 bp = (struct bufarea *)Malloc(sizeof(struct bufarea));
 197                 bufp = Malloc((unsigned int)sblock.fs_bsize);
 198                 if (bp == NULL || bufp == NULL) {
 199                         if (i >= MINBUFS)
 200                                 break;
 201                         errx(EEXIT, "cannot allocate buffer pool");
 202                 }
 203                 bp->b_un.b_buf = bufp;
 204                 TAILQ_INSERT_HEAD(&bufhead, bp, b_list);
 205                 initbarea(bp, BT_UNKNOWN);
 206         }
 207         numbufs = i;    /* save number of buffers */
 208         for (i = 0; i < BT_NUMBUFTYPES; i++) {
 209                 readtime[i].tv_sec = totalreadtime[i].tv_sec = 0;
 210                 readtime[i].tv_nsec = totalreadtime[i].tv_nsec = 0;
 211                 readcnt[i] = totalreadcnt[i] = 0;
 212         }
 213 }
 214
 215 /*
 216  * Manage cylinder group buffers.
 217  */
 218 static struct bufarea *cgbufs;  /* header for cylinder group cache */
 219 static int flushtries;          /* number of tries to reclaim memory */
 220
 221 struct bufarea *
 222 cgget(int cg)
 223 {
 224         struct bufarea *cgbp;
 225         struct cg *cgp;
 226
 227         if (cgbufs == NULL) {
 228                 cgbufs = calloc(sblock.fs_ncg, sizeof(struct bufarea));
 229                 if (cgbufs == NULL)
 230                         errx(EEXIT, "cannot allocate cylinder group buffers");
 231         }
 232         cgbp = &cgbufs[cg];
 233         if (cgbp->b_un.b_cg != NULL)
 234                 return (cgbp);
 235         cgp = NULL;
 236         if (flushtries == 0)
 237                 cgp = malloc((unsigned int)sblock.fs_cgsize);
 238         if (cgp == NULL) {
 239                 getblk(&cgblk, cgtod(&sblock, cg), sblock.fs_cgsize);
 240                 return (&cgblk);
 241         }
 242         cgbp->b_un.b_cg = cgp;
 243         initbarea(cgbp, BT_CYLGRP);
 244         getblk(cgbp, cgtod(&sblock, cg), sblock.fs_cgsize);
 245         return (cgbp);
 246 }
 247
 248 /*
 249  * Attempt to flush a cylinder group cache entry.
 250  * Return whether the flush was successful.
 251  */
 252 int
 253 flushentry(void)
 254 {
 255         struct bufarea *cgbp;
 256
 257         if (flushtries == sblock.fs_ncg || cgbufs == NULL)
 258                 return (0);
 259         cgbp = &cgbufs[flushtries++];
 260         if (cgbp->b_un.b_cg == NULL)
 261                 return (0);
 262         flush(fswritefd, cgbp);
 263         free(cgbp->b_un.b_buf);
 264         cgbp->b_un.b_buf = NULL;
 265         return (1);
 266 }
 267
 268 /*
 269  * Manage a cache of directory blocks.
 270  */
 271 struct bufarea *
 272 getdatablk(ufs2_daddr_t blkno, long size, int type)
 273 {
 274         struct bufarea *bp;
 275
 276         TAILQ_FOREACH(bp, &bufhead, b_list)
 277                 if (bp->b_bno == fsbtodb(&sblock, blkno))
 278                         goto foundit;
 279         TAILQ_FOREACH_REVERSE(bp, &bufhead, buflist, b_list)
 280                 if ((bp->b_flags & B_INUSE) == 0)
 281                         break;
 282         if (bp == NULL)
 283                 errx(EEXIT, "deadlocked buffer pool");
 284         bp->b_type = type;
 285         getblk(bp, blkno, size);
 286         /* fall through */
 287 foundit:
 288         if (debug && bp->b_type != type)
 289                 printf("Buffer type changed from %s to %s\n",
 290                     buftype[bp->b_type], buftype[type]);
 291         TAILQ_REMOVE(&bufhead, bp, b_list);
 292         TAILQ_INSERT_HEAD(&bufhead, bp, b_list);
 293         bp->b_flags |= B_INUSE;
 294         return (bp);
 295 }
 296
 297 /*
 298  * Timespec operations (from <sys/time.h>).
 299  */
 300 #define timespecsub(vvp, uvp)                                           \
 301         do {                                                            \
 302                 (vvp)->tv_sec -= (uvp)->tv_sec;                         \
 303                 (vvp)->tv_nsec -= (uvp)->tv_nsec;                       \
 304                 if ((vvp)->tv_nsec < 0) {                               \
 305                         (vvp)->tv_sec--;                                \
 306                         (vvp)->tv_nsec += 1000000000;                   \
 307                 }                                                       \
 308         } while (0)
 309 #define timespecadd(vvp, uvp)                                           \
 310         do {                                                            \
 311                 (vvp)->tv_sec += (uvp)->tv_sec;                         \
 312                 (vvp)->tv_nsec += (uvp)->tv_nsec;                       \
 313                 if ((vvp)->tv_nsec >= 1000000000) {                     \
 314                         (vvp)->tv_sec++;                                \
 315                         (vvp)->tv_nsec -= 1000000000;                   \
 316                 }                                                       \
 317         } while (0)
 318
 319 void
 320 getblk(struct bufarea *bp, ufs2_daddr_t blk, long size)
 321 {
 322         ufs2_daddr_t dblk;
 323         struct timespec start, finish;
 324
 325         dblk = fsbtodb(&sblock, blk);
 326         if (bp->b_bno == dblk) {
 327                 totalreads++;
 328         } else {
 329                 flush(fswritefd, bp);
 330                 if (debug) {
 331                         readcnt[bp->b_type]++;
 332                         clock_gettime(CLOCK_REALTIME_PRECISE, &start);
 333                 }
 334                 bp->b_errs = blread(fsreadfd, bp->b_un.b_buf, dblk, size);
 335                 if (debug) {
 336                         clock_gettime(CLOCK_REALTIME_PRECISE, &finish);
 337                         timespecsub(&finish, &start);
 338                         timespecadd(&readtime[bp->b_type], &finish);
 339                 }
 340                 bp->b_bno = dblk;
 341                 bp->b_size = size;
 342         }
 343 }
 344
 345 void
 346 flush(int fd, struct bufarea *bp)
 347 {
 348         int i, j;
 349
 350         if (!bp->b_dirty)
 351                 return;
 352         bp->b_dirty = 0;
 353         if (fswritefd < 0) {
 354                 pfatal("WRITING IN READ_ONLY MODE.\n");
 355                 return;
 356         }
 357         if (bp->b_errs != 0)
 358                 pfatal("WRITING %sZERO'ED BLOCK %lld TO DISK\n",
 359                     (bp->b_errs == bp->b_size / dev_bsize) ? "" : "PARTIALLY ",
 360                     (long long)bp->b_bno);
 361         bp->b_errs = 0;
 362         blwrite(fd, bp->b_un.b_buf, bp->b_bno, bp->b_size);
 363         if (bp != &sblk)
 364                 return;
 365         for (i = 0, j = 0; i < sblock.fs_cssize; i += sblock.fs_bsize, j++) {
 366                 blwrite(fswritefd, (char *)sblock.fs_csp + i,
 367                     fsbtodb(&sblock, sblock.fs_csaddr + j * sblock.fs_frag),
 368                     sblock.fs_cssize - i < sblock.fs_bsize ?
 369                     sblock.fs_cssize - i : sblock.fs_bsize);
 370         }
 371 }
 372
 373 void
 374 rwerror(const char *mesg, ufs2_daddr_t blk)
 375 {
 376
 377         if (bkgrdcheck)
 378                 exit(EEXIT);
 379         if (preen == 0)
 380                 printf("\n");
 381         pfatal("CANNOT %s: %ld", mesg, (long)blk);
 382         if (reply("CONTINUE") == 0)
 383                 exit(EEXIT);
 384 }
 385
 386 void
 387 ckfini(int markclean)
 388 {
 389         struct bufarea *bp, *nbp;
 390         int ofsmodified, cnt;
 391
 392         if (bkgrdflag) {
 393                 unlink(snapname);
 394                 if ((!(sblock.fs_flags & FS_UNCLEAN)) != markclean) {
 395                         cmd.value = FS_UNCLEAN;
 396                         cmd.size = markclean ? -1 : 1;
 397                         if (sysctlbyname("vfs.ffs.setflags", 0, 0,
 398                             &cmd, sizeof cmd) == -1)
 399                                 rwerror("SET FILE SYSTEM FLAGS", FS_UNCLEAN);
 400                         if (!preen) {
 401                                 printf("\n***** FILE SYSTEM MARKED %s *****\n",
 402                                     markclean ? "CLEAN" : "DIRTY");
 403                                 if (!markclean)
 404                                         rerun = 1;
 405                         }
 406                 } else if (!preen && !markclean) {
 407                         printf("\n***** FILE SYSTEM STILL DIRTY *****\n");
 408                         rerun = 1;
 409                 }
 410         }
 411         if (debug && totalreads > 0)
 412                 printf("cache with %d buffers missed %ld of %ld (%d%%)\n",
 413                     numbufs, totaldiskreads, totalreads,
 414                     (int)(totaldiskreads * 100 / totalreads));
 415         if (fswritefd < 0) {
 416                 (void)close(fsreadfd);
 417                 return;
 418         }
 419         flush(fswritefd, &sblk);
 420         if (havesb && cursnapshot == 0 && sblock.fs_magic == FS_UFS2_MAGIC &&
 421             sblk.b_bno != sblock.fs_sblockloc / dev_bsize &&
 422             !preen && reply("UPDATE STANDARD SUPERBLOCK")) {
 423                 sblk.b_bno = sblock.fs_sblockloc / dev_bsize;
 424                 sbdirty();
 425                 flush(fswritefd, &sblk);
 426         }
 427         flush(fswritefd, &cgblk);
 428         free(cgblk.b_un.b_buf);
 429         cnt = 0;
 430         TAILQ_FOREACH_REVERSE_SAFE(bp, &bufhead, buflist, b_list, nbp) {
 431                 TAILQ_REMOVE(&bufhead, bp, b_list);
 432                 cnt++;
 433                 flush(fswritefd, bp);
 434                 free(bp->b_un.b_buf);
 435                 free((char *)bp);
 436         }
 437         if (numbufs != cnt)
 438                 errx(EEXIT, "panic: lost %d buffers", numbufs - cnt);
 439         if (cgbufs != NULL) {
 440                 for (cnt = 0; cnt < sblock.fs_ncg; cnt++) {
 441                         if (cgbufs[cnt].b_un.b_cg == NULL)
 442                                 continue;
 443                         flush(fswritefd, &cgbufs[cnt]);
 444                         free(cgbufs[cnt].b_un.b_cg);
 445                 }
 446                 free(cgbufs);
 447         }
 448         pbp = pdirbp = (struct bufarea *)0;
 449         if (cursnapshot == 0 && sblock.fs_clean != markclean) {
 450                 if ((sblock.fs_clean = markclean) != 0) {
 451                         sblock.fs_flags &= ~(FS_UNCLEAN | FS_NEEDSFSCK);
 452                         sblock.fs_pendingblocks = 0;
 453                         sblock.fs_pendinginodes = 0;
 454                 }
 455                 sbdirty();
 456                 ofsmodified = fsmodified;
 457                 flush(fswritefd, &sblk);
 458                 fsmodified = ofsmodified;
 459                 if (!preen) {
 460                         printf("\n***** FILE SYSTEM MARKED %s *****\n",
 461                             markclean ? "CLEAN" : "DIRTY");
 462                         if (!markclean)
 463                                 rerun = 1;
 464                 }
 465         } else if (!preen) {
 466                 if (markclean) {
 467                         printf("\n***** FILE SYSTEM IS CLEAN *****\n");
 468                 } else {
 469                         printf("\n***** FILE SYSTEM STILL DIRTY *****\n");
 470                         rerun = 1;
 471                 }
 472         }
 473         (void)close(fsreadfd);
 474         (void)close(fswritefd);
 475 }
 476
 477 /*
 478  * Print out I/O statistics.
 479  */
 480 void
 481 IOstats(char *what)
 482 {
 483         int i;
 484
 485         if (debug == 0)
 486                 return;
 487         if (diskreads == 0) {
 488                 printf("%s: no I/O\n\n", what);
 489                 return;
 490         }
 491         if (startpass.tv_sec == 0)
 492                 startpass = startprog;
 493         printf("%s: I/O statistics\n", what);
 494         printIOstats();
 495         totaldiskreads += diskreads;
 496         diskreads = 0;
 497         for (i = 0; i < BT_NUMBUFTYPES; i++) {
 498                 timespecadd(&totalreadtime[i], &readtime[i]);
 499                 totalreadcnt[i] += readcnt[i];
 500                 readtime[i].tv_sec = readtime[i].tv_nsec = 0;
 501                 readcnt[i] = 0;
 502         }
 503         clock_gettime(CLOCK_REALTIME_PRECISE, &startpass);
 504 }
 505
 506 void
 507 finalIOstats(void)
 508 {
 509         int i;
 510
 511         if (debug == 0)
 512                 return;
 513         printf("Final I/O statistics\n");
 514         totaldiskreads += diskreads;
 515         diskreads = totaldiskreads;
 516         startpass = startprog;
 517         for (i = 0; i < BT_NUMBUFTYPES; i++) {
 518                 timespecadd(&totalreadtime[i], &readtime[i]);
 519                 totalreadcnt[i] += readcnt[i];
 520                 readtime[i] = totalreadtime[i];
 521                 readcnt[i] = totalreadcnt[i];
 522         }
 523         printIOstats();
 524 }
 525
 526 static void printIOstats(void)
 527 {
 528         long long msec, totalmsec;
 529         int i;
 530
 531         clock_gettime(CLOCK_REALTIME_PRECISE, &finishpass);
 532         timespecsub(&finishpass, &startpass);
 533         printf("Running time: %jd.%03ld sec\n",
 534                 (intmax_t)finishpass.tv_sec, finishpass.tv_nsec / 1000000);
 535         printf("buffer reads by type:\n");
 536         for (totalmsec = 0, i = 0; i < BT_NUMBUFTYPES; i++)
 537                 totalmsec += readtime[i].tv_sec * 1000 +
 538                     readtime[i].tv_nsec / 1000000;
 539         if (totalmsec == 0)
 540                 totalmsec = 1;
 541         for (i = 0; i < BT_NUMBUFTYPES; i++) {
 542                 if (readcnt[i] == 0)
 543                         continue;
 544                 msec =
 545                     readtime[i].tv_sec * 1000 + readtime[i].tv_nsec / 1000000;
 546                 printf("%21s:%8ld %2ld.%ld%% %4jd.%03ld sec %2lld.%lld%%\n",
 547                     buftype[i], readcnt[i], readcnt[i] * 100 / diskreads,
 548                     (readcnt[i] * 1000 / diskreads) % 10,
 549                     (intmax_t)readtime[i].tv_sec, readtime[i].tv_nsec / 1000000,
 550                     msec * 100 / totalmsec, (msec * 1000 / totalmsec) % 10);
 551         }
 552         printf("\n");
 553 }
 554
 555 int
 556 blread(int fd, char *buf, ufs2_daddr_t blk, long size)
 557 {
 558         char *cp;
 559         int i, errs;
 560         off_t offset;
 561
 562         offset = blk;
 563         offset *= dev_bsize;
 564         if (bkgrdflag)
 565                 slowio_start();
 566         totalreads++;
 567         diskreads++;
 568         if (lseek(fd, offset, 0) < 0)
 569                 rwerror("SEEK BLK", blk);
 570         else if (read(fd, buf, (int)size) == size) {
 571                 if (bkgrdflag)
 572                         slowio_end();
 573                 return (0);
 574         }
 575
 576         /*
 577          * This is handled specially here instead of in rwerror because
 578          * rwerror is used for all sorts of errors, not just true read/write
 579          * errors.  It should be refactored and fixed.
 580          */
 581         if (surrender) {
 582                 pfatal("CANNOT READ_BLK: %ld", (long)blk);
 583                 errx(EEXIT, "ABORTING DUE TO READ ERRORS");
 584         } else
 585                 rwerror("READ BLK", blk);
 586
 587         if (lseek(fd, offset, 0) < 0)
 588                 rwerror("SEEK BLK", blk);
 589         errs = 0;
 590         memset(buf, 0, (size_t)size);
 591         printf("THE FOLLOWING DISK SECTORS COULD NOT BE READ:");
 592         for (cp = buf, i = 0; i < size; i += secsize, cp += secsize) {
 593                 if (read(fd, cp, (int)secsize) != secsize) {
 594                         (void)lseek(fd, offset + i + secsize, 0);
 595                         if (secsize != dev_bsize && dev_bsize != 1)
 596                                 printf(" %jd (%jd),",
 597                                     (intmax_t)(blk * dev_bsize + i) / secsize,
 598                                     (intmax_t)blk + i / dev_bsize);
 599                         else
 600                                 printf(" %jd,", (intmax_t)blk + i / dev_bsize);
 601                         errs++;
 602                 }
 603         }
 604         printf("\n");
 605         if (errs)
 606                 resolved = 0;
 607         return (errs);
 608 }
 609
 610 void
 611 blwrite(int fd, char *buf, ufs2_daddr_t blk, ssize_t size)
 612 {
 613         int i;
 614         char *cp;
 615         off_t offset;
 616
 617         if (fd < 0)
 618                 return;
 619         offset = blk;
 620         offset *= dev_bsize;
 621         if (lseek(fd, offset, 0) < 0)
 622                 rwerror("SEEK BLK", blk);
 623         else if (write(fd, buf, size) == size) {
 624                 fsmodified = 1;
 625                 return;
 626         }
 627         resolved = 0;
 628         rwerror("WRITE BLK", blk);
 629         if (lseek(fd, offset, 0) < 0)
 630                 rwerror("SEEK BLK", blk);
 631         printf("THE FOLLOWING SECTORS COULD NOT BE WRITTEN:");
 632         for (cp = buf, i = 0; i < size; i += dev_bsize, cp += dev_bsize)
 633                 if (write(fd, cp, dev_bsize) != dev_bsize) {
 634                         (void)lseek(fd, offset + i + dev_bsize, 0);
 635                         printf(" %jd,", (intmax_t)blk + i / dev_bsize);
 636                 }
 637         printf("\n");
 638         return;
 639 }
 640
 641 void
 642 blerase(int fd, ufs2_daddr_t blk, long size)
 643 {
 644         off_t ioarg[2];
 645
 646         if (fd < 0)
 647                 return;
 648         ioarg[0] = blk * dev_bsize;
 649         ioarg[1] = size;
 650         ioctl(fd, DIOCGDELETE, ioarg);
 651         /* we don't really care if we succeed or not */
 652         return;
 653 }
 654
 655 /*
 656  * Fill a contiguous region with all-zeroes.  Note ZEROBUFSIZE is by
 657  * definition a multiple of dev_bsize.
 658  */
 659 void
 660 blzero(int fd, ufs2_daddr_t blk, long size)
 661 {
 662         static char *zero;
 663         off_t offset, len;
 664
 665         if (fd < 0)
 666                 return;
 667         if (zero == NULL) {
 668                 zero = calloc(ZEROBUFSIZE, 1);
 669                 if (zero == NULL)
 670                         errx(EEXIT, "cannot allocate buffer pool");
 671         }
 672         offset = blk * dev_bsize;
 673         if (lseek(fd, offset, 0) < 0)
 674                 rwerror("SEEK BLK", blk);
 675         while (size > 0) {
 676                 len = size > ZEROBUFSIZE ? ZEROBUFSIZE : size;
 677                 if (write(fd, zero, len) != len)
 678                         rwerror("WRITE BLK", blk);
 679                 blk += len / dev_bsize;
 680                 size -= len;
 681         }
 682 }
 683
 684 /*
 685  * Verify cylinder group's magic number and other parameters.  If the
 686  * test fails, offer an option to rebuild the whole cylinder group.
 687  */
 688 int
 689 check_cgmagic(int cg, struct bufarea *cgbp)
 690 {
 691         struct cg *cgp = cgbp->b_un.b_cg;
 692
 693         /*
 694          * Extended cylinder group checks.
 695          */
 696         if (cg_chkmagic(cgp) &&
 697             ((sblock.fs_magic == FS_UFS1_MAGIC &&
 698               cgp->cg_old_niblk == sblock.fs_ipg &&
 699               cgp->cg_ndblk <= sblock.fs_fpg &&
 700               cgp->cg_old_ncyl <= sblock.fs_old_cpg) ||
 701              (sblock.fs_magic == FS_UFS2_MAGIC &&
 702               cgp->cg_niblk == sblock.fs_ipg &&
 703               cgp->cg_ndblk <= sblock.fs_fpg &&
 704               cgp->cg_initediblk <= sblock.fs_ipg))) {
 705                 return (1);
 706         }
 707         pfatal("CYLINDER GROUP %d: BAD MAGIC NUMBER", cg);
 708         if (!reply("REBUILD CYLINDER GROUP")) {
 709                 printf("YOU WILL NEED TO RERUN FSCK.\n");
 710                 rerun = 1;
 711                 return (1);
 712         }
 713         /*
 714          * Zero out the cylinder group and then initialize critical fields.
 715          * Bit maps and summaries will be recalculated by later passes.
 716          */
 717         memset(cgp, 0, (size_t)sblock.fs_cgsize);
 718         cgp->cg_magic = CG_MAGIC;
 719         cgp->cg_cgx = cg;
 720         cgp->cg_niblk = sblock.fs_ipg;
 721         cgp->cg_initediblk = sblock.fs_ipg < 2 * INOPB(&sblock) ?
 722             sblock.fs_ipg : 2 * INOPB(&sblock);
 723         if (cgbase(&sblock, cg) + sblock.fs_fpg < sblock.fs_size)
 724                 cgp->cg_ndblk = sblock.fs_fpg;
 725         else
 726                 cgp->cg_ndblk = sblock.fs_size - cgbase(&sblock, cg);
 727         cgp->cg_iusedoff = &cgp->cg_space[0] - (u_char *)(&cgp->cg_firstfield);
 728         if (sblock.fs_magic == FS_UFS1_MAGIC) {
 729                 cgp->cg_niblk = 0;
 730                 cgp->cg_initediblk = 0;
 731                 cgp->cg_old_ncyl = sblock.fs_old_cpg;
 732                 cgp->cg_old_niblk = sblock.fs_ipg;
 733                 cgp->cg_old_btotoff = cgp->cg_iusedoff;
 734                 cgp->cg_old_boff = cgp->cg_old_btotoff +
 735                     sblock.fs_old_cpg * sizeof(int32_t);
 736                 cgp->cg_iusedoff = cgp->cg_old_boff +
 737                     sblock.fs_old_cpg * sizeof(u_int16_t);
 738         }
 739         cgp->cg_freeoff = cgp->cg_iusedoff + howmany(sblock.fs_ipg, CHAR_BIT);
 740         cgp->cg_nextfreeoff = cgp->cg_freeoff + howmany(sblock.fs_fpg,CHAR_BIT);
 741         if (sblock.fs_contigsumsize > 0) {
 742                 cgp->cg_nclusterblks = cgp->cg_ndblk / sblock.fs_frag;
 743                 cgp->cg_clustersumoff =
 744                     roundup(cgp->cg_nextfreeoff, sizeof(u_int32_t));
 745                 cgp->cg_clustersumoff -= sizeof(u_int32_t);
 746                 cgp->cg_clusteroff = cgp->cg_clustersumoff +
 747                     (sblock.fs_contigsumsize + 1) * sizeof(u_int32_t);
 748                 cgp->cg_nextfreeoff = cgp->cg_clusteroff +
 749                     howmany(fragstoblks(&sblock, sblock.fs_fpg), CHAR_BIT);
 750         }
 751         dirty(cgbp);
 752         return (0);
 753 }
 754
 755 /*
 756  * allocate a data block with the specified number of fragments
 757  */
 758 ufs2_daddr_t
 759 allocblk(long frags)
 760 {
 761         int i, j, k, cg, baseblk;
 762         struct bufarea *cgbp;
 763         struct cg *cgp;
 764
 765         if (frags <= 0 || frags > sblock.fs_frag)
 766                 return (0);
 767         for (i = 0; i < maxfsblock - sblock.fs_frag; i += sblock.fs_frag) {
 768                 for (j = 0; j <= sblock.fs_frag - frags; j++) {
 769                         if (testbmap(i + j))
 770                                 continue;
 771                         for (k = 1; k < frags; k++)
 772                                 if (testbmap(i + j + k))
 773                                         break;
 774                         if (k < frags) {
 775                                 j += k;
 776                                 continue;
 777                         }
 778                         cg = dtog(&sblock, i + j);
 779                         cgbp = cgget(cg);
 780                         cgp = cgbp->b_un.b_cg;
 781                         if (!check_cgmagic(cg, cgbp))
 782                                 return (0);
 783                         baseblk = dtogd(&sblock, i + j);
 784                         for (k = 0; k < frags; k++) {
 785                                 setbmap(i + j + k);
 786                                 clrbit(cg_blksfree(cgp), baseblk + k);
 787                         }
 788                         n_blks += frags;
 789                         if (frags == sblock.fs_frag)
 790                                 cgp->cg_cs.cs_nbfree--;
 791                         else
 792                                 cgp->cg_cs.cs_nffree -= frags;
 793                         dirty(cgbp);
 794                         return (i + j);
 795                 }
 796         }
 797         return (0);
 798 }
 799
 800 /*
 801  * Free a previously allocated block
 802  */
 803 void
 804 freeblk(ufs2_daddr_t blkno, long frags)
 805 {
 806         struct inodesc idesc;
 807
 808         idesc.id_blkno = blkno;
 809         idesc.id_numfrags = frags;
 810         (void)pass4check(&idesc);
 811 }
 812
 813 /* Slow down IO so as to leave some disk bandwidth for other processes */
 814 void
 815 slowio_start()
 816 {
 817
 818         /* Delay one in every 8 operations */
 819         slowio_pollcnt = (slowio_pollcnt + 1) & 7;
 820         if (slowio_pollcnt == 0) {
 821                 gettimeofday(&slowio_starttime, NULL);
 822         }
 823 }
 824
 825 void
 826 slowio_end()
 827 {
 828         struct timeval tv;
 829         int delay_usec;
 830
 831         if (slowio_pollcnt != 0)
 832                 return;
 833
 834         /* Update the slowdown interval. */
 835         gettimeofday(&tv, NULL);
 836         delay_usec = (tv.tv_sec - slowio_starttime.tv_sec) * 1000000 +
 837             (tv.tv_usec - slowio_starttime.tv_usec);
 838         if (delay_usec < 64)
 839                 delay_usec = 64;
 840         if (delay_usec > 2500000)
 841                 delay_usec = 2500000;
 842         slowio_delay_usec = (slowio_delay_usec * 63 + delay_usec) >> 6;
 843         /* delay by 8 times the average IO delay */
 844         if (slowio_delay_usec > 64)
 845                 usleep(slowio_delay_usec * 8);
 846 }
 847
 848 /*
 849  * Find a pathname
 850  */
 851 void
 852 getpathname(char *namebuf, ino_t curdir, ino_t ino)
 853 {
 854         int len;
 855         char *cp;
 856         struct inodesc idesc;
 857         static int busy = 0;
 858
 859         if (curdir == ino && ino == ROOTINO) {
 860                 (void)strcpy(namebuf, "/");
 861                 return;
 862         }
 863         if (busy || !INO_IS_DVALID(curdir)) {
 864                 (void)strcpy(namebuf, "?");
 865                 return;
 866         }
 867         busy = 1;
 868         memset(&idesc, 0, sizeof(struct inodesc));
 869         idesc.id_type = DATA;
 870         idesc.id_fix = IGNORE;
 871         cp = &namebuf[MAXPATHLEN - 1];
 872         *cp = '\0';
 873         if (curdir != ino) {
 874                 idesc.id_parent = curdir;
 875                 goto namelookup;
 876         }
 877         while (ino != ROOTINO) {
 878                 idesc.id_number = ino;
 879                 idesc.id_func = findino;
 880                 idesc.id_name = strdup("..");
 881                 if ((ckinode(ginode(ino), &idesc) & FOUND) == 0)
 882                         break;
 883         namelookup:
 884                 idesc.id_number = idesc.id_parent;
 885                 idesc.id_parent = ino;
 886                 idesc.id_func = findname;
 887                 idesc.id_name = namebuf;
 888                 if ((ckinode(ginode(idesc.id_number), &idesc)&FOUND) == 0)
 889                         break;
 890                 len = strlen(namebuf);
 891                 cp -= len;
 892                 memmove(cp, namebuf, (size_t)len);
 893                 *--cp = '/';
 894                 if (cp < &namebuf[MAXNAMLEN])
 895                         break;
 896                 ino = idesc.id_number;
 897         }
 898         busy = 0;
 899         if (ino != ROOTINO)
 900                 *--cp = '?';
 901         memmove(namebuf, cp, (size_t)(&namebuf[MAXPATHLEN] - cp));
 902 }
 903
 904 void
 905 catch(int sig __unused)
 906 {
 907
 908         ckfini(0);
 909         exit(12);
 910 }
 911
 912 /*
 913  * When preening, allow a single quit to signal
 914  * a special exit after file system checks complete
 915  * so that reboot sequence may be interrupted.
 916  */
 917 void
 918 catchquit(int sig __unused)
 919 {
 920         printf("returning to single-user after file system check\n");
 921         returntosingle = 1;
 922         (void)signal(SIGQUIT, SIG_DFL);
 923 }
 924
 925 /*
 926  * determine whether an inode should be fixed.
 927  */
 928 int
 929 dofix(struct inodesc *idesc, const char *msg)
 930 {
 931
 932         switch (idesc->id_fix) {
 933
 934         case DONTKNOW:
 935                 if (idesc->id_type == DATA)
 936                         direrror(idesc->id_number, msg);
 937                 else
 938                         pwarn("%s", msg);
 939                 if (preen) {
 940                         printf(" (SALVAGED)\n");
 941                         idesc->id_fix = FIX;
 942                         return (ALTERED);
 943                 }
 944                 if (reply("SALVAGE") == 0) {
 945                         idesc->id_fix = NOFIX;
 946                         return (0);
 947                 }
 948                 idesc->id_fix = FIX;
 949                 return (ALTERED);
 950
 951         case FIX:
 952                 return (ALTERED);
 953
 954         case NOFIX:
 955         case IGNORE:
 956                 return (0);
 957
 958         default:
 959                 errx(EEXIT, "UNKNOWN INODESC FIX MODE %d", idesc->id_fix);
 960         }
 961         /* NOTREACHED */
 962         return (0);
 963 }
 964
 965 #include <stdarg.h>
 966
 967 /*
 968  * An unexpected inconsistency occurred.
 969  * Die if preening or file system is running with soft dependency protocol,
 970  * otherwise just print message and continue.
 971  */
 972 void
 973 pfatal(const char *fmt, ...)
 974 {
 975         va_list ap;
 976         va_start(ap, fmt);
 977         if (!preen) {
 978                 (void)vfprintf(stdout, fmt, ap);
 979                 va_end(ap);
 980                 if (usedsoftdep)
 981                         (void)fprintf(stdout,
 982                             "\nUNEXPECTED SOFT UPDATE INCONSISTENCY\n");
 983                 /*
 984                  * Force foreground fsck to clean up inconsistency.
 985                  */
 986                 if (bkgrdflag) {
 987                         cmd.value = FS_NEEDSFSCK;
 988                         cmd.size = 1;
 989                         if (sysctlbyname("vfs.ffs.setflags", 0, 0,
 990                             &cmd, sizeof cmd) == -1)
 991                                 pwarn("CANNOT SET FS_NEEDSFSCK FLAG\n");
 992                         fprintf(stdout, "CANNOT RUN IN BACKGROUND\n");
 993                         ckfini(0);
 994                         exit(EEXIT);
 995                 }
 996                 return;
 997         }
 998         if (cdevname == NULL)
 999                 cdevname = strdup("fsck");
1000         (void)fprintf(stdout, "%s: ", cdevname);
1001         (void)vfprintf(stdout, fmt, ap);
1002         (void)fprintf(stdout,
1003             "\n%s: UNEXPECTED%sINCONSISTENCY; RUN fsck MANUALLY.\n",
1004             cdevname, usedsoftdep ? " SOFT UPDATE " : " ");
1005         /*
1006          * Force foreground fsck to clean up inconsistency.
1007          */
1008         if (bkgrdflag) {
1009                 cmd.value = FS_NEEDSFSCK;
1010                 cmd.size = 1;
1011                 if (sysctlbyname("vfs.ffs.setflags", 0, 0,
1012                     &cmd, sizeof cmd) == -1)
1013                         pwarn("CANNOT SET FS_NEEDSFSCK FLAG\n");
1014         }
1015         ckfini(0);
1016         exit(EEXIT);
1017 }
1018
1019 /*
1020  * Pwarn just prints a message when not preening or running soft dependency
1021  * protocol, or a warning (preceded by filename) when preening.
1022  */
1023 void
1024 pwarn(const char *fmt, ...)
1025 {
1026         va_list ap;
1027         va_start(ap, fmt);
1028         if (preen)
1029                 (void)fprintf(stdout, "%s: ", cdevname);
1030         (void)vfprintf(stdout, fmt, ap);
1031         va_end(ap);
1032 }
1033
1034 /*
1035  * Stub for routines from kernel.
1036  */
1037 void
1038 panic(const char *fmt, ...)
1039 {
1040         va_list ap;
1041         va_start(ap, fmt);
1042         pfatal("INTERNAL INCONSISTENCY:");
1043         (void)vfprintf(stdout, fmt, ap);
1044         va_end(ap);
1045         exit(EEXIT);
1046 }