sbin/fsck_ffs/fsutil.c

   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 int             sujrecovery = 0;
  68
  69 static struct bufarea *allocbuf(const char *);
  70 static void cg_write(struct bufarea *);
  71 static void slowio_start(void);
  72 static void slowio_end(void);
  73 static void printIOstats(void);
  74 static void prtbuf(const char *, struct bufarea *);
  75
  76 static long diskreads, totaldiskreads, totalreads; /* Disk cache statistics */
  77 static struct timespec startpass, finishpass;
  78 struct timeval slowio_starttime;
  79 int slowio_delay_usec = 10000;  /* Initial IO delay for background fsck */
  80 int slowio_pollcnt;
  81 static struct bufarea cgblk;    /* backup buffer for cylinder group blocks */
  82 static TAILQ_HEAD(bufqueue, bufarea) bufqueuehd; /* head of buffer cache LRU */
  83 static LIST_HEAD(bufhash, bufarea) bufhashhd[HASHSIZE]; /* buffer hash list */
  84 static int numbufs;                             /* size of buffer cache */
  85 static int cachelookups;                        /* number of cache lookups */
  86 static int cachereads;                          /* number of cache reads */
  87 static struct bufarea *cgbufs;  /* header for cylinder group cache */
  88 static int flushtries;          /* number of tries to reclaim memory */
  89
  90 char *buftype[BT_NUMBUFTYPES] = BT_NAMES;
  91
  92 void
  93 fsutilinit(void)
  94 {
  95         diskreads = totaldiskreads = totalreads = 0;
  96         bzero(&startpass, sizeof(struct timespec));
  97         bzero(&finishpass, sizeof(struct timespec));
  98         bzero(&slowio_starttime, sizeof(struct timeval));
  99         slowio_delay_usec = 10000;
 100         slowio_pollcnt = 0;
 101         flushtries = 0;
 102 }
 103
 104 int
 105 ftypeok(union dinode *dp)
 106 {
 107         switch (DIP(dp, di_mode) & IFMT) {
 108
 109         case IFDIR:
 110         case IFREG:
 111         case IFBLK:
 112         case IFCHR:
 113         case IFLNK:
 114         case IFSOCK:
 115         case IFIFO:
 116                 return (1);
 117
 118         default:
 119                 if (debug)
 120                         printf("bad file type 0%o\n", DIP(dp, di_mode));
 121                 return (0);
 122         }
 123 }
 124
 125 int
 126 reply(const char *question)
 127 {
 128         int persevere;
 129         char c;
 130
 131         if (preen)
 132                 pfatal("INTERNAL ERROR: GOT TO reply()");
 133         persevere = !strcmp(question, "CONTINUE");
 134         printf("\n");
 135         if (!persevere && (nflag || (fswritefd < 0 && bkgrdflag == 0))) {
 136                 printf("%s? no\n\n", question);
 137                 resolved = 0;
 138                 return (0);
 139         }
 140         if (yflag || (persevere && nflag)) {
 141                 printf("%s? yes\n\n", question);
 142                 return (1);
 143         }
 144         do      {
 145                 printf("%s? [yn] ", question);
 146                 (void) fflush(stdout);
 147                 c = getc(stdin);
 148                 while (c != '\n' && getc(stdin) != '\n') {
 149                         if (feof(stdin)) {
 150                                 resolved = 0;
 151                                 return (0);
 152                         }
 153                 }
 154         } while (c != 'y' && c != 'Y' && c != 'n' && c != 'N');
 155         printf("\n");
 156         if (c == 'y' || c == 'Y')
 157                 return (1);
 158         resolved = 0;
 159         return (0);
 160 }
 161
 162 /*
 163  * Look up state information for an inode.
 164  */
 165 struct inostat *
 166 inoinfo(ino_t inum)
 167 {
 168         static struct inostat unallocated = { USTATE, 0, 0 };
 169         struct inostatlist *ilp;
 170         int iloff;
 171
 172         if (inum > maxino)
 173                 errx(EEXIT, "inoinfo: inumber %ju out of range",
 174                     (uintmax_t)inum);
 175         ilp = &inostathead[inum / sblock.fs_ipg];
 176         iloff = inum % sblock.fs_ipg;
 177         if (iloff >= ilp->il_numalloced)
 178                 return (&unallocated);
 179         return (&ilp->il_stat[iloff]);
 180 }
 181
 182 /*
 183  * Malloc buffers and set up cache.
 184  */
 185 void
 186 bufinit(void)
 187 {
 188         int i;
 189
 190         pdirbp = (struct bufarea *)0;
 191         bzero(&cgblk, sizeof(struct bufarea));
 192         cgblk.b_un.b_buf = Malloc((unsigned int)sblock.fs_bsize);
 193         if (cgblk.b_un.b_buf == NULL)
 194                 errx(EEXIT, "Initial malloc(%d) failed", sblock.fs_bsize);
 195         initbarea(&cgblk, BT_CYLGRP);
 196         cgbufs = NULL;
 197         numbufs = cachelookups = cachereads = 0;
 198         TAILQ_INIT(&bufqueuehd);
 199         for (i = 0; i < HASHSIZE; i++)
 200                 LIST_INIT(&bufhashhd[i]);
 201         for (i = 0; i < BT_NUMBUFTYPES; i++) {
 202                 readtime[i].tv_sec = totalreadtime[i].tv_sec = 0;
 203                 readtime[i].tv_nsec = totalreadtime[i].tv_nsec = 0;
 204                 readcnt[i] = totalreadcnt[i] = 0;
 205         }
 206 }
 207
 208 static struct bufarea *
 209 allocbuf(const char *failreason)
 210 {
 211         struct bufarea *bp;
 212         char *bufp;
 213
 214         bp = (struct bufarea *)Malloc(sizeof(struct bufarea));
 215         bufp = Malloc((unsigned int)sblock.fs_bsize);
 216         if (bp == NULL || bufp == NULL) {
 217                 errx(EEXIT, "%s", failreason);
 218                 /* NOTREACHED */
 219         }
 220         numbufs++;
 221         bp->b_un.b_buf = bufp;
 222         TAILQ_INSERT_HEAD(&bufqueuehd, bp, b_list);
 223         initbarea(bp, BT_UNKNOWN);
 224         return (bp);
 225 }
 226
 227 /*
 228  * Manage cylinder group buffers.
 229  *
 230  * Use getblk() here rather than cgget() because the cylinder group
 231  * may be corrupted but we want it anyway so we can fix it.
 232  */
 233 static struct bufarea *cgbufs;  /* header for cylinder group cache */
 234 static int flushtries;          /* number of tries to reclaim memory */
 235
 236 struct bufarea *
 237 cglookup(int cg)
 238 {
 239         struct bufarea *cgbp;
 240         struct cg *cgp;
 241
 242         if ((unsigned) cg >= sblock.fs_ncg)
 243                 errx(EEXIT, "cglookup: out of range cylinder group %d", cg);
 244         if (cgbufs == NULL) {
 245                 cgbufs = calloc(sblock.fs_ncg, sizeof(struct bufarea));
 246                 if (cgbufs == NULL)
 247                         errx(EEXIT, "Cannot allocate cylinder group buffers");
 248         }
 249         cgbp = &cgbufs[cg];
 250         if (cgbp->b_un.b_cg != NULL)
 251                 return (cgbp);
 252         cgp = NULL;
 253         if (flushtries == 0)
 254                 cgp = Malloc((unsigned int)sblock.fs_cgsize);
 255         if (cgp == NULL) {
 256                 if (sujrecovery)
 257                         errx(EEXIT,"Ran out of memory during journal recovery");
 258                 getblk(&cgblk, cgtod(&sblock, cg), sblock.fs_cgsize);
 259                 return (&cgblk);
 260         }
 261         cgbp->b_un.b_cg = cgp;
 262         initbarea(cgbp, BT_CYLGRP);
 263         getblk(cgbp, cgtod(&sblock, cg), sblock.fs_cgsize);
 264         return (cgbp);
 265 }
 266
 267 /*
 268  * Mark a cylinder group buffer as dirty.
 269  * Update its check-hash if they are enabled.
 270  */
 271 void
 272 cgdirty(struct bufarea *cgbp)
 273 {
 274         struct cg *cg;
 275
 276         cg = cgbp->b_un.b_cg;
 277         if ((sblock.fs_metackhash & CK_CYLGRP) != 0) {
 278                 cg->cg_ckhash = 0;
 279                 cg->cg_ckhash =
 280                     calculate_crc32c(~0L, (void *)cg, sblock.fs_cgsize);
 281         }
 282         dirty(cgbp);
 283 }
 284
 285 /*
 286  * Attempt to flush a cylinder group cache entry.
 287  * Return whether the flush was successful.
 288  */
 289 int
 290 flushentry(void)
 291 {
 292         struct bufarea *cgbp;
 293
 294         if (sujrecovery || flushtries == sblock.fs_ncg || cgbufs == NULL)
 295                 return (0);
 296         cgbp = &cgbufs[flushtries++];
 297         if (cgbp->b_un.b_cg == NULL)
 298                 return (0);
 299         flush(fswritefd, cgbp);
 300         free(cgbp->b_un.b_buf);
 301         cgbp->b_un.b_buf = NULL;
 302         return (1);
 303 }
 304
 305 /*
 306  * Manage a cache of directory blocks.
 307  */
 308 struct bufarea *
 309 getdatablk(ufs2_daddr_t blkno, long size, int type)
 310 {
 311         struct bufarea *bp;
 312         struct bufhash *bhdp;
 313
 314         cachelookups++;
 315         /* If out of range, return empty buffer with b_err == -1 */
 316         if (type != BT_INODES && chkrange(blkno, size / sblock.fs_fsize)) {
 317                 blkno = -1;
 318                 type = BT_EMPTY;
 319         }
 320         bhdp = &bufhashhd[HASH(blkno)];
 321         LIST_FOREACH(bp, bhdp, b_hash)
 322                 if (bp->b_bno == fsbtodb(&sblock, blkno)) {
 323                         if (debug && bp->b_size != size) {
 324                                 prtbuf("getdatablk: size mismatch", bp);
 325                                 pfatal("getdatablk: b_size %d != size %ld\n",
 326                                     bp->b_size, size);
 327                         }
 328                         goto foundit;
 329                 }
 330         /*
 331          * Move long-term busy buffer back to the front of the LRU so we
 332          * do not endless inspect them for recycling.
 333          */
 334         bp = TAILQ_LAST(&bufqueuehd, bufqueue);
 335         if (bp != NULL && bp->b_refcnt != 0) {
 336                 TAILQ_REMOVE(&bufqueuehd, bp, b_list);
 337                 TAILQ_INSERT_HEAD(&bufqueuehd, bp, b_list);
 338         }
 339         /*
 340          * Allocate up to the minimum number of buffers before
 341          * considering recycling any of them.
 342          */
 343         if (size > sblock.fs_bsize)
 344                 errx(EEXIT, "Excessive buffer size %ld > %d\n", size,
 345                     sblock.fs_bsize);
 346         if (numbufs < MINBUFS) {
 347                 bp = allocbuf("cannot create minimal buffer pool");
 348         } else if (sujrecovery) {
 349                 /*
 350                  * SUJ recovery does not want anything written until it
 351                  * has successfully completed (so it can fail back to
 352                  * full fsck). Thus, we can only recycle clean buffers.
 353                  */
 354                 TAILQ_FOREACH_REVERSE(bp, &bufqueuehd, bufqueue, b_list)
 355                         if ((bp->b_flags & B_DIRTY) == 0 && bp->b_refcnt == 0)
 356                                 break;
 357                 if (bp == NULL)
 358                         bp = allocbuf("Ran out of memory during "
 359                             "journal recovery");
 360                 else
 361                         LIST_REMOVE(bp, b_hash);
 362         } else {
 363                 /*
 364                  * Recycle oldest non-busy buffer.
 365                  */
 366                 TAILQ_FOREACH_REVERSE(bp, &bufqueuehd, bufqueue, b_list)
 367                         if (bp->b_refcnt == 0)
 368                                 break;
 369                 if (bp == NULL)
 370                         bp = allocbuf("Ran out of memory for buffers");
 371                 else
 372                         LIST_REMOVE(bp, b_hash);
 373         }
 374         flush(fswritefd, bp);
 375         bp->b_type = type;
 376         LIST_INSERT_HEAD(bhdp, bp, b_hash);
 377         getblk(bp, blkno, size);
 378         cachereads++;
 379         /* fall through */
 380 foundit:
 381         if (debug && bp->b_type != type) {
 382                 printf("getdatablk: buffer type changed to %s",
 383                     BT_BUFTYPE(type));
 384                 prtbuf("", bp);
 385         }
 386         TAILQ_REMOVE(&bufqueuehd, bp, b_list);
 387         TAILQ_INSERT_HEAD(&bufqueuehd, bp, b_list);
 388         if (bp->b_errs == 0)
 389                 bp->b_refcnt++;
 390         return (bp);
 391 }
 392
 393 void
 394 getblk(struct bufarea *bp, ufs2_daddr_t blk, long size)
 395 {
 396         ufs2_daddr_t dblk;
 397         struct timespec start, finish;
 398
 399         dblk = fsbtodb(&sblock, blk);
 400         if (bp->b_bno == dblk) {
 401                 totalreads++;
 402         } else {
 403                 if (debug) {
 404                         readcnt[bp->b_type]++;
 405                         clock_gettime(CLOCK_REALTIME_PRECISE, &start);
 406                 }
 407                 if (bp->b_type != BT_EMPTY)
 408                         bp->b_errs =
 409                             blread(fsreadfd, bp->b_un.b_buf, dblk, size);
 410                 else
 411                         bp->b_errs = -1;
 412                 if (debug) {
 413                         clock_gettime(CLOCK_REALTIME_PRECISE, &finish);
 414                         timespecsub(&finish, &start, &finish);
 415                         timespecadd(&readtime[bp->b_type], &finish,
 416                             &readtime[bp->b_type]);
 417                 }
 418                 bp->b_bno = dblk;
 419                 bp->b_size = size;
 420         }
 421 }
 422
 423 void
 424 brelse(struct bufarea *bp)
 425 {
 426
 427         if (bp->b_refcnt <= 0)
 428                 prtbuf("brelse: buffer with negative reference count", bp);
 429         bp->b_refcnt--;
 430 }
 431
 432 void
 433 flush(int fd, struct bufarea *bp)
 434 {
 435         struct inode ip;
 436
 437         if ((bp->b_flags & B_DIRTY) == 0)
 438                 return;
 439         bp->b_flags &= ~B_DIRTY;
 440         if (fswritefd < 0) {
 441                 pfatal("WRITING IN READ_ONLY MODE.\n");
 442                 return;
 443         }
 444         if (bp->b_errs != 0)
 445                 pfatal("WRITING %sZERO'ED BLOCK %lld TO DISK\n",
 446                     (bp->b_errs == bp->b_size / dev_bsize) ? "" : "PARTIALLY ",
 447                     (long long)bp->b_bno);
 448         bp->b_errs = 0;
 449         /*
 450          * Write using the appropriate function.
 451          */
 452         switch (bp->b_type) {
 453         case BT_SUPERBLK:
 454                 if (bp != &sblk)
 455                         pfatal("BUFFER %p DOES NOT MATCH SBLK %p\n",
 456                             bp, &sblk);
 457                 if (sbput(fd, bp->b_un.b_fs, 0) == 0)
 458                         fsmodified = 1;
 459                 break;
 460         case BT_CYLGRP:
 461                 if (sujrecovery)
 462                         cg_write(bp);
 463                 if (cgput(fswritefd, &sblock, bp->b_un.b_cg) == 0)
 464                         fsmodified = 1;
 465                 break;
 466         case BT_INODES:
 467                 if (debug && sblock.fs_magic == FS_UFS2_MAGIC) {
 468                         struct ufs2_dinode *dp = bp->b_un.b_dinode2;
 469                         int i;
 470
 471                         for (i = 0; i < INOPB(&sblock); dp++, i++) {
 472                                 if (ffs_verify_dinode_ckhash(&sblock, dp) == 0)
 473                                         continue;
 474                                 pwarn("flush: INODE CHECK-HASH FAILED");
 475                                 ip.i_bp = bp;
 476                                 ip.i_dp = (union dinode *)dp;
 477                                 ip.i_number = bp->b_index + i;
 478                                 prtinode(&ip);
 479                                 if (preen || reply("FIX") != 0) {
 480                                         if (preen)
 481                                                 printf(" (FIXED)\n");
 482                                         ffs_update_dinode_ckhash(&sblock, dp);
 483                                         inodirty(&ip);
 484                                 }
 485                         }
 486                 }
 487                 /* FALLTHROUGH */
 488         default:
 489                 blwrite(fd, bp->b_un.b_buf, bp->b_bno, bp->b_size);
 490                 break;
 491         }
 492 }
 493
 494 /*
 495  * Journaled soft updates does not maintain cylinder group summary
 496  * information during cleanup, so this routine recalculates the summary
 497  * information and updates the superblock summary in preparation for
 498  * writing out the cylinder group.
 499  */
 500 static void
 501 cg_write(struct bufarea *bp)
 502 {
 503         ufs1_daddr_t fragno, cgbno, maxbno;
 504         u_int8_t *blksfree;
 505         struct cg *cgp;
 506         int blk;
 507         int i;
 508
 509         /*
 510          * Fix the frag and cluster summary.
 511          */
 512         cgp = bp->b_un.b_cg;
 513         cgp->cg_cs.cs_nbfree = 0;
 514         cgp->cg_cs.cs_nffree = 0;
 515         bzero(&cgp->cg_frsum, sizeof(cgp->cg_frsum));
 516         maxbno = fragstoblks(&sblock, sblock.fs_fpg);
 517         if (sblock.fs_contigsumsize > 0) {
 518                 for (i = 1; i <= sblock.fs_contigsumsize; i++)
 519                         cg_clustersum(cgp)[i] = 0;
 520                 bzero(cg_clustersfree(cgp), howmany(maxbno, CHAR_BIT));
 521         }
 522         blksfree = cg_blksfree(cgp);
 523         for (cgbno = 0; cgbno < maxbno; cgbno++) {
 524                 if (ffs_isfreeblock(&sblock, blksfree, cgbno))
 525                         continue;
 526                 if (ffs_isblock(&sblock, blksfree, cgbno)) {
 527                         ffs_clusteracct(&sblock, cgp, cgbno, 1);
 528                         cgp->cg_cs.cs_nbfree++;
 529                         continue;
 530                 }
 531                 fragno = blkstofrags(&sblock, cgbno);
 532                 blk = blkmap(&sblock, blksfree, fragno);
 533                 ffs_fragacct(&sblock, blk, cgp->cg_frsum, 1);
 534                 for (i = 0; i < sblock.fs_frag; i++)
 535                         if (isset(blksfree, fragno + i))
 536                                 cgp->cg_cs.cs_nffree++;
 537         }
 538         /*
 539          * Update the superblock cg summary from our now correct values
 540          * before writing the block.
 541          */
 542         sblock.fs_cs(&sblock, cgp->cg_cgx) = cgp->cg_cs;
 543 }
 544
 545 void
 546 rwerror(const char *mesg, ufs2_daddr_t blk)
 547 {
 548
 549         if (bkgrdcheck)
 550                 exit(EEXIT);
 551         if (preen == 0)
 552                 printf("\n");
 553         pfatal("CANNOT %s: %ld", mesg, (long)blk);
 554         if (reply("CONTINUE") == 0)
 555                 exit(EEXIT);
 556 }
 557
 558 void
 559 ckfini(int markclean)
 560 {
 561         struct bufarea *bp, *nbp;
 562         int ofsmodified, cnt;
 563
 564         if (bkgrdflag) {
 565                 unlink(snapname);
 566                 if ((!(sblock.fs_flags & FS_UNCLEAN)) != markclean) {
 567                         cmd.value = FS_UNCLEAN;
 568                         cmd.size = markclean ? -1 : 1;
 569                         if (sysctlbyname("vfs.ffs.setflags", 0, 0,
 570                             &cmd, sizeof cmd) == -1)
 571                                 rwerror("SET FILE SYSTEM FLAGS", FS_UNCLEAN);
 572                         if (!preen) {
 573                                 printf("\n***** FILE SYSTEM MARKED %s *****\n",
 574                                     markclean ? "CLEAN" : "DIRTY");
 575                                 if (!markclean)
 576                                         rerun = 1;
 577                         }
 578                 } else if (!preen && !markclean) {
 579                         printf("\n***** FILE SYSTEM STILL DIRTY *****\n");
 580                         rerun = 1;
 581                 }
 582         }
 583         if (debug && totalreads > 0)
 584                 printf("cache with %d buffers missed %d of %d (%d%%)\n",
 585                     numbufs, cachereads, cachelookups,
 586                     (int)(cachereads * 100 / cachelookups));
 587         if (fswritefd < 0) {
 588                 (void)close(fsreadfd);
 589                 return;
 590         }
 591         /*
 592          * To remain idempotent with partial truncations the buffers
 593          * must be flushed in this order:
 594          *  1) cylinder groups (bitmaps)
 595          *  2) indirect, directory, external attribute, and data blocks
 596          *  3) inode blocks
 597          *  4) superblock
 598          * This ordering preserves access to the modified pointers
 599          * until they are freed.
 600          */
 601         /* Step 1: cylinder groups */
 602         if (debug)
 603                 printf("Flush Cylinder groups\n");
 604         if (cgbufs != NULL) {
 605                 for (cnt = 0; cnt < sblock.fs_ncg; cnt++) {
 606                         if (cgbufs[cnt].b_un.b_cg == NULL)
 607                                 continue;
 608                         flush(fswritefd, &cgbufs[cnt]);
 609                         free(cgbufs[cnt].b_un.b_cg);
 610                 }
 611                 free(cgbufs);
 612         }
 613         flush(fswritefd, &cgblk);
 614         free(cgblk.b_un.b_buf);
 615         cnt = 0;
 616         /* Step 2: indirect, directory, external attribute, and data blocks */
 617         if (debug)
 618                 printf("Flush indirect, directory, external attribute, "
 619                     "and data blocks\n");
 620         if (pdirbp != NULL)
 621                 brelse(pdirbp);
 622         TAILQ_FOREACH_REVERSE_SAFE(bp, &bufqueuehd, bufqueue, b_list, nbp) {
 623                 switch (bp->b_type) {
 624                 /* These should not be in the buffer cache list */
 625                 case BT_UNKNOWN:
 626                 case BT_SUPERBLK:
 627                 case BT_CYLGRP:
 628                 default:
 629                         prtbuf("ckfini: improper buffer type on cache list",bp);
 630                         continue;
 631                 /* These are the ones to flush in this step */
 632                 case BT_EMPTY:
 633                         if (bp->b_bno >= 0)
 634                                 pfatal("Unused BT_EMPTY buffer for block %jd\n",
 635                                     (intmax_t)bp->b_bno);
 636                         /* FALLTHROUGH */
 637                 case BT_LEVEL1:
 638                 case BT_LEVEL2:
 639                 case BT_LEVEL3:
 640                 case BT_EXTATTR:
 641                 case BT_DIRDATA:
 642                 case BT_DATA:
 643                         break;
 644                 /* These are the ones to flush in the next step */
 645                 case BT_INODES:
 646                         continue;
 647                 }
 648                 if (debug && bp->b_refcnt != 0) {
 649                         prtbuf("ckfini: clearing in-use buffer", bp);
 650                         pfatal("ckfini: clearing in-use buffer\n");
 651                 }
 652                 TAILQ_REMOVE(&bufqueuehd, bp, b_list);
 653                 cnt++;
 654                 flush(fswritefd, bp);
 655                 free(bp->b_un.b_buf);
 656                 free((char *)bp);
 657         }
 658         /* Step 3: inode blocks */
 659         if (debug)
 660                 printf("Flush inode blocks\n");
 661         if (icachebp != NULL)
 662                 brelse(icachebp);
 663         TAILQ_FOREACH_REVERSE_SAFE(bp, &bufqueuehd, bufqueue, b_list, nbp) {
 664                 if (debug && bp->b_refcnt != 0) {
 665                         prtbuf("ckfini: clearing in-use buffer", bp);
 666                         pfatal("ckfini: clearing in-use buffer\n");
 667                 }
 668                 TAILQ_REMOVE(&bufqueuehd, bp, b_list);
 669                 cnt++;
 670                 flush(fswritefd, bp);
 671                 free(bp->b_un.b_buf);
 672                 free((char *)bp);
 673         }
 674         if (numbufs != cnt)
 675                 errx(EEXIT, "panic: lost %d buffers", numbufs - cnt);
 676         /* Step 4: superblock */
 677         if (debug)
 678                 printf("Flush the superblock\n");
 679         flush(fswritefd, &sblk);
 680         if (havesb && cursnapshot == 0 && sblock.fs_magic == FS_UFS2_MAGIC &&
 681             sblk.b_bno != sblock.fs_sblockloc / dev_bsize &&
 682             !preen && reply("UPDATE STANDARD SUPERBLOCK")) {
 683                 /* Change the write destination to standard superblock */
 684                 sblock.fs_sblockactualloc = sblock.fs_sblockloc;
 685                 sblk.b_bno = sblock.fs_sblockloc / dev_bsize;
 686                 sbdirty();
 687                 flush(fswritefd, &sblk);
 688         }
 689         pdirbp = (struct bufarea *)0;
 690         if (cursnapshot == 0 && sblock.fs_clean != markclean) {
 691                 if ((sblock.fs_clean = markclean) != 0) {
 692                         sblock.fs_flags &= ~(FS_UNCLEAN | FS_NEEDSFSCK);
 693                         sblock.fs_pendingblocks = 0;
 694                         sblock.fs_pendinginodes = 0;
 695                 }
 696                 sbdirty();
 697                 ofsmodified = fsmodified;
 698                 flush(fswritefd, &sblk);
 699                 fsmodified = ofsmodified;
 700                 if (!preen) {
 701                         printf("\n***** FILE SYSTEM MARKED %s *****\n",
 702                             markclean ? "CLEAN" : "DIRTY");
 703                         if (!markclean)
 704                                 rerun = 1;
 705                 }
 706         } else if (!preen) {
 707                 if (markclean) {
 708                         printf("\n***** FILE SYSTEM IS CLEAN *****\n");
 709                 } else {
 710                         printf("\n***** FILE SYSTEM STILL DIRTY *****\n");
 711                         rerun = 1;
 712                 }
 713         }
 714         finalIOstats();
 715         (void)close(fsreadfd);
 716         (void)close(fswritefd);
 717 }
 718
 719 /*
 720  * Print out I/O statistics.
 721  */
 722 void
 723 IOstats(char *what)
 724 {
 725         int i;
 726
 727         if (debug == 0)
 728                 return;
 729         if (diskreads == 0) {
 730                 printf("%s: no I/O\n\n", what);
 731                 return;
 732         }
 733         if (startpass.tv_sec == 0)
 734                 startpass = startprog;
 735         printf("%s: I/O statistics\n", what);
 736         printIOstats();
 737         totaldiskreads += diskreads;
 738         diskreads = 0;
 739         for (i = 0; i < BT_NUMBUFTYPES; i++) {
 740                 timespecadd(&totalreadtime[i], &readtime[i], &totalreadtime[i]);
 741                 totalreadcnt[i] += readcnt[i];
 742                 readtime[i].tv_sec = readtime[i].tv_nsec = 0;
 743                 readcnt[i] = 0;
 744         }
 745         clock_gettime(CLOCK_REALTIME_PRECISE, &startpass);
 746 }
 747
 748 void
 749 finalIOstats(void)
 750 {
 751         int i;
 752
 753         if (debug == 0)
 754                 return;
 755         printf("Final I/O statistics\n");
 756         totaldiskreads += diskreads;
 757         diskreads = totaldiskreads;
 758         startpass = startprog;
 759         for (i = 0; i < BT_NUMBUFTYPES; i++) {
 760                 timespecadd(&totalreadtime[i], &readtime[i], &totalreadtime[i]);
 761                 totalreadcnt[i] += readcnt[i];
 762                 readtime[i] = totalreadtime[i];
 763                 readcnt[i] = totalreadcnt[i];
 764         }
 765         printIOstats();
 766 }
 767
 768 static void printIOstats(void)
 769 {
 770         long long msec, totalmsec;
 771         int i;
 772
 773         clock_gettime(CLOCK_REALTIME_PRECISE, &finishpass);
 774         timespecsub(&finishpass, &startpass, &finishpass);
 775         printf("Running time: %jd.%03ld sec\n",
 776                 (intmax_t)finishpass.tv_sec, finishpass.tv_nsec / 1000000);
 777         printf("buffer reads by type:\n");
 778         for (totalmsec = 0, i = 0; i < BT_NUMBUFTYPES; i++)
 779                 totalmsec += readtime[i].tv_sec * 1000 +
 780                     readtime[i].tv_nsec / 1000000;
 781         if (totalmsec == 0)
 782                 totalmsec = 1;
 783         for (i = 0; i < BT_NUMBUFTYPES; i++) {
 784                 if (readcnt[i] == 0)
 785                         continue;
 786                 msec =
 787                     readtime[i].tv_sec * 1000 + readtime[i].tv_nsec / 1000000;
 788                 printf("%21s:%8ld %2ld.%ld%% %4jd.%03ld sec %2lld.%lld%%\n",
 789                     buftype[i], readcnt[i], readcnt[i] * 100 / diskreads,
 790                     (readcnt[i] * 1000 / diskreads) % 10,
 791                     (intmax_t)readtime[i].tv_sec, readtime[i].tv_nsec / 1000000,
 792                     msec * 100 / totalmsec, (msec * 1000 / totalmsec) % 10);
 793         }
 794         printf("\n");
 795 }
 796
 797 int
 798 blread(int fd, char *buf, ufs2_daddr_t blk, long size)
 799 {
 800         char *cp;
 801         int i, errs;
 802         off_t offset;
 803
 804         offset = blk;
 805         offset *= dev_bsize;
 806         if (bkgrdflag)
 807                 slowio_start();
 808         totalreads++;
 809         diskreads++;
 810         if (pread(fd, buf, (int)size, offset) == size) {
 811                 if (bkgrdflag)
 812                         slowio_end();
 813                 return (0);
 814         }
 815
 816         /*
 817          * This is handled specially here instead of in rwerror because
 818          * rwerror is used for all sorts of errors, not just true read/write
 819          * errors.  It should be refactored and fixed.
 820          */
 821         if (surrender) {
 822                 pfatal("CANNOT READ_BLK: %ld", (long)blk);
 823                 errx(EEXIT, "ABORTING DUE TO READ ERRORS");
 824         } else
 825                 rwerror("READ BLK", blk);
 826
 827         errs = 0;
 828         memset(buf, 0, (size_t)size);
 829         printf("THE FOLLOWING DISK SECTORS COULD NOT BE READ:");
 830         for (cp = buf, i = 0; i < size; i += secsize, cp += secsize) {
 831                 if (pread(fd, cp, (int)secsize, offset + i) != secsize) {
 832                         if (secsize != dev_bsize && dev_bsize != 1)
 833                                 printf(" %jd (%jd),",
 834                                     (intmax_t)(blk * dev_bsize + i) / secsize,
 835                                     (intmax_t)blk + i / dev_bsize);
 836                         else
 837                                 printf(" %jd,", (intmax_t)blk + i / dev_bsize);
 838                         errs++;
 839                 }
 840         }
 841         printf("\n");
 842         if (errs)
 843                 resolved = 0;
 844         return (errs);
 845 }
 846
 847 void
 848 blwrite(int fd, char *buf, ufs2_daddr_t blk, ssize_t size)
 849 {
 850         int i;
 851         char *cp;
 852         off_t offset;
 853
 854         if (fd < 0)
 855                 return;
 856         offset = blk;
 857         offset *= dev_bsize;
 858         if (pwrite(fd, buf, size, offset) == size) {
 859                 fsmodified = 1;
 860                 return;
 861         }
 862         resolved = 0;
 863         rwerror("WRITE BLK", blk);
 864         printf("THE FOLLOWING SECTORS COULD NOT BE WRITTEN:");
 865         for (cp = buf, i = 0; i < size; i += dev_bsize, cp += dev_bsize)
 866                 if (pwrite(fd, cp, dev_bsize, offset + i) != dev_bsize)
 867                         printf(" %jd,", (intmax_t)blk + i / dev_bsize);
 868         printf("\n");
 869         return;
 870 }
 871
 872 void
 873 blerase(int fd, ufs2_daddr_t blk, long size)
 874 {
 875         off_t ioarg[2];
 876
 877         if (fd < 0)
 878                 return;
 879         ioarg[0] = blk * dev_bsize;
 880         ioarg[1] = size;
 881         ioctl(fd, DIOCGDELETE, ioarg);
 882         /* we don't really care if we succeed or not */
 883         return;
 884 }
 885
 886 /*
 887  * Fill a contiguous region with all-zeroes.  Note ZEROBUFSIZE is by
 888  * definition a multiple of dev_bsize.
 889  */
 890 void
 891 blzero(int fd, ufs2_daddr_t blk, long size)
 892 {
 893         static char *zero;
 894         off_t offset, len;
 895
 896         if (fd < 0)
 897                 return;
 898         if (zero == NULL) {
 899                 zero = calloc(ZEROBUFSIZE, 1);
 900                 if (zero == NULL)
 901                         errx(EEXIT, "cannot allocate buffer pool");
 902         }
 903         offset = blk * dev_bsize;
 904         if (lseek(fd, offset, 0) < 0)
 905                 rwerror("SEEK BLK", blk);
 906         while (size > 0) {
 907                 len = MIN(ZEROBUFSIZE, size);
 908                 if (write(fd, zero, len) != len)
 909                         rwerror("WRITE BLK", blk);
 910                 blk += len / dev_bsize;
 911                 size -= len;
 912         }
 913 }
 914
 915 /*
 916  * Verify cylinder group's magic number and other parameters.  If the
 917  * test fails, offer an option to rebuild the whole cylinder group.
 918  */
 919 int
 920 check_cgmagic(int cg, struct bufarea *cgbp, int request_rebuild)
 921 {
 922         struct cg *cgp = cgbp->b_un.b_cg;
 923         uint32_t cghash, calchash;
 924
 925         /*
 926          * Extended cylinder group checks.
 927          */
 928         calchash = cgp->cg_ckhash;
 929         if ((sblock.fs_metackhash & CK_CYLGRP) != 0 &&
 930             (ckhashadd & CK_CYLGRP) == 0) {
 931                 cghash = cgp->cg_ckhash;
 932                 cgp->cg_ckhash = 0;
 933                 calchash = calculate_crc32c(~0L, (void *)cgp, sblock.fs_cgsize);
 934                 cgp->cg_ckhash = cghash;
 935         }
 936         if (cgp->cg_ckhash == calchash &&
 937             cg_chkmagic(cgp) &&
 938             cgp->cg_cgx == cg &&
 939             ((sblock.fs_magic == FS_UFS1_MAGIC &&
 940               cgp->cg_old_niblk == sblock.fs_ipg &&
 941               cgp->cg_ndblk <= sblock.fs_fpg &&
 942               cgp->cg_old_ncyl <= sblock.fs_old_cpg) ||
 943              (sblock.fs_magic == FS_UFS2_MAGIC &&
 944               cgp->cg_niblk == sblock.fs_ipg &&
 945               cgp->cg_ndblk <= sblock.fs_fpg &&
 946               cgp->cg_initediblk <= sblock.fs_ipg))) {
 947                 return (1);
 948         }
 949         pfatal("CYLINDER GROUP %d: INTEGRITY CHECK FAILED", cg);
 950         if (!request_rebuild)
 951                 return (0);
 952         if (!reply("REBUILD CYLINDER GROUP")) {
 953                 printf("YOU WILL NEED TO RERUN FSCK.\n");
 954                 rerun = 1;
 955                 return (1);
 956         }
 957         /*
 958          * Zero out the cylinder group and then initialize critical fields.
 959          * Bit maps and summaries will be recalculated by later passes.
 960          */
 961         memset(cgp, 0, (size_t)sblock.fs_cgsize);
 962         cgp->cg_magic = CG_MAGIC;
 963         cgp->cg_cgx = cg;
 964         cgp->cg_niblk = sblock.fs_ipg;
 965         cgp->cg_initediblk = MIN(sblock.fs_ipg, 2 * INOPB(&sblock));
 966         if (cgbase(&sblock, cg) + sblock.fs_fpg < sblock.fs_size)
 967                 cgp->cg_ndblk = sblock.fs_fpg;
 968         else
 969                 cgp->cg_ndblk = sblock.fs_size - cgbase(&sblock, cg);
 970         cgp->cg_iusedoff = &cgp->cg_space[0] - (u_char *)(&cgp->cg_firstfield);
 971         if (sblock.fs_magic == FS_UFS1_MAGIC) {
 972                 cgp->cg_niblk = 0;
 973                 cgp->cg_initediblk = 0;
 974                 cgp->cg_old_ncyl = sblock.fs_old_cpg;
 975                 cgp->cg_old_niblk = sblock.fs_ipg;
 976                 cgp->cg_old_btotoff = cgp->cg_iusedoff;
 977                 cgp->cg_old_boff = cgp->cg_old_btotoff +
 978                     sblock.fs_old_cpg * sizeof(int32_t);
 979                 cgp->cg_iusedoff = cgp->cg_old_boff +
 980                     sblock.fs_old_cpg * sizeof(u_int16_t);
 981         }
 982         cgp->cg_freeoff = cgp->cg_iusedoff + howmany(sblock.fs_ipg, CHAR_BIT);
 983         cgp->cg_nextfreeoff = cgp->cg_freeoff + howmany(sblock.fs_fpg,CHAR_BIT);
 984         if (sblock.fs_contigsumsize > 0) {
 985                 cgp->cg_nclusterblks = cgp->cg_ndblk / sblock.fs_frag;
 986                 cgp->cg_clustersumoff =
 987                     roundup(cgp->cg_nextfreeoff, sizeof(u_int32_t));
 988                 cgp->cg_clustersumoff -= sizeof(u_int32_t);
 989                 cgp->cg_clusteroff = cgp->cg_clustersumoff +
 990                     (sblock.fs_contigsumsize + 1) * sizeof(u_int32_t);
 991                 cgp->cg_nextfreeoff = cgp->cg_clusteroff +
 992                     howmany(fragstoblks(&sblock, sblock.fs_fpg), CHAR_BIT);
 993         }
 994         cgdirty(cgbp);
 995         return (0);
 996 }
 997
 998 /*
 999  * allocate a data block with the specified number of fragments
1000  */
1001 ufs2_daddr_t
1002 allocblk(long frags)
1003 {
1004         int i, j, k, cg, baseblk;
1005         struct bufarea *cgbp;
1006         struct cg *cgp;
1007
1008         if (frags <= 0 || frags > sblock.fs_frag)
1009                 return (0);
1010         for (i = 0; i < maxfsblock - sblock.fs_frag; i += sblock.fs_frag) {
1011                 for (j = 0; j <= sblock.fs_frag - frags; j++) {
1012                         if (testbmap(i + j))
1013                                 continue;
1014                         for (k = 1; k < frags; k++)
1015                                 if (testbmap(i + j + k))
1016                                         break;
1017                         if (k < frags) {
1018                                 j += k;
1019                                 continue;
1020                         }
1021                         cg = dtog(&sblock, i + j);
1022                         cgbp = cglookup(cg);
1023                         cgp = cgbp->b_un.b_cg;
1024                         if (!check_cgmagic(cg, cgbp, 0))
1025                                 return (0);
1026                         baseblk = dtogd(&sblock, i + j);
1027                         for (k = 0; k < frags; k++) {
1028                                 setbmap(i + j + k);
1029                                 clrbit(cg_blksfree(cgp), baseblk + k);
1030                         }
1031                         n_blks += frags;
1032                         if (frags == sblock.fs_frag)
1033                                 cgp->cg_cs.cs_nbfree--;
1034                         else
1035                                 cgp->cg_cs.cs_nffree -= frags;
1036                         cgdirty(cgbp);
1037                         return (i + j);
1038                 }
1039         }
1040         return (0);
1041 }
1042
1043 /*
1044  * Slow down IO so as to leave some disk bandwidth for other processes
1045  */
1046 void
1047 slowio_start()
1048 {
1049
1050         /* Delay one in every 8 operations */
1051         slowio_pollcnt = (slowio_pollcnt + 1) & 7;
1052         if (slowio_pollcnt == 0) {
1053                 gettimeofday(&slowio_starttime, NULL);
1054         }
1055 }
1056
1057 void
1058 slowio_end()
1059 {
1060         struct timeval tv;
1061         int delay_usec;
1062
1063         if (slowio_pollcnt != 0)
1064                 return;
1065
1066         /* Update the slowdown interval. */
1067         gettimeofday(&tv, NULL);
1068         delay_usec = (tv.tv_sec - slowio_starttime.tv_sec) * 1000000 +
1069             (tv.tv_usec - slowio_starttime.tv_usec);
1070         if (delay_usec < 64)
1071                 delay_usec = 64;
1072         if (delay_usec > 2500000)
1073                 delay_usec = 2500000;
1074         slowio_delay_usec = (slowio_delay_usec * 63 + delay_usec) >> 6;
1075         /* delay by 8 times the average IO delay */
1076         if (slowio_delay_usec > 64)
1077                 usleep(slowio_delay_usec * 8);
1078 }
1079
1080 /*
1081  * Find a pathname
1082  */
1083 void
1084 getpathname(char *namebuf, ino_t curdir, ino_t ino)
1085 {
1086         int len;
1087         char *cp;
1088         struct inode ip;
1089         struct inodesc idesc;
1090         static int busy = 0;
1091
1092         if (curdir == ino && ino == UFS_ROOTINO) {
1093                 (void)strcpy(namebuf, "/");
1094                 return;
1095         }
1096         if (busy || !INO_IS_DVALID(curdir)) {
1097                 (void)strcpy(namebuf, "?");
1098                 return;
1099         }
1100         busy = 1;
1101         memset(&idesc, 0, sizeof(struct inodesc));
1102         idesc.id_type = DATA;
1103         idesc.id_fix = IGNORE;
1104         cp = &namebuf[MAXPATHLEN - 1];
1105         *cp = '\0';
1106         if (curdir != ino) {
1107                 idesc.id_parent = curdir;
1108                 goto namelookup;
1109         }
1110         while (ino != UFS_ROOTINO) {
1111                 idesc.id_number = ino;
1112                 idesc.id_func = findino;
1113                 idesc.id_name = strdup("..");
1114                 ginode(ino, &ip);
1115                 if ((ckinode(ip.i_dp, &idesc) & FOUND) == 0) {
1116                         irelse(&ip);
1117                         break;
1118                 }
1119                 irelse(&ip);
1120         namelookup:
1121                 idesc.id_number = idesc.id_parent;
1122                 idesc.id_parent = ino;
1123                 idesc.id_func = findname;
1124                 idesc.id_name = namebuf;
1125                 ginode(idesc.id_number, &ip);
1126                 if ((ckinode(ip.i_dp, &idesc) & FOUND) == 0) {
1127                         irelse(&ip);
1128                         break;
1129                 }
1130                 irelse(&ip);
1131                 len = strlen(namebuf);
1132                 cp -= len;
1133                 memmove(cp, namebuf, (size_t)len);
1134                 *--cp = '/';
1135                 if (cp < &namebuf[UFS_MAXNAMLEN])
1136                         break;
1137                 ino = idesc.id_number;
1138         }
1139         busy = 0;
1140         if (ino != UFS_ROOTINO)
1141                 *--cp = '?';
1142         memmove(namebuf, cp, (size_t)(&namebuf[MAXPATHLEN] - cp));
1143 }
1144
1145 void
1146 catch(int sig __unused)
1147 {
1148
1149         ckfini(0);
1150         exit(12);
1151 }
1152
1153 /*
1154  * When preening, allow a single quit to signal
1155  * a special exit after file system checks complete
1156  * so that reboot sequence may be interrupted.
1157  */
1158 void
1159 catchquit(int sig __unused)
1160 {
1161         printf("returning to single-user after file system check\n");
1162         returntosingle = 1;
1163         (void)signal(SIGQUIT, SIG_DFL);
1164 }
1165
1166 /*
1167  * determine whether an inode should be fixed.
1168  */
1169 int
1170 dofix(struct inodesc *idesc, const char *msg)
1171 {
1172
1173         switch (idesc->id_fix) {
1174
1175         case DONTKNOW:
1176                 if (idesc->id_type == DATA)
1177                         direrror(idesc->id_number, msg);
1178                 else
1179                         pwarn("%s", msg);
1180                 if (preen) {
1181                         printf(" (SALVAGED)\n");
1182                         idesc->id_fix = FIX;
1183                         return (ALTERED);
1184                 }
1185                 if (reply("SALVAGE") == 0) {
1186                         idesc->id_fix = NOFIX;
1187                         return (0);
1188                 }
1189                 idesc->id_fix = FIX;
1190                 return (ALTERED);
1191
1192         case FIX:
1193                 return (ALTERED);
1194
1195         case NOFIX:
1196         case IGNORE:
1197                 return (0);
1198
1199         default:
1200                 errx(EEXIT, "UNKNOWN INODESC FIX MODE %d", idesc->id_fix);
1201         }
1202         /* NOTREACHED */
1203         return (0);
1204 }
1205
1206 #include <stdarg.h>
1207
1208 /*
1209  * Print details about a buffer.
1210  */
1211 static void
1212 prtbuf(const char *msg, struct bufarea *bp)
1213 {
1214
1215         printf("%s: bp %p, type %s, bno %jd, size %d, refcnt %d, flags %s, "
1216             "index %jd\n", msg, bp, BT_BUFTYPE(bp->b_type), (intmax_t) bp->b_bno,
1217             bp->b_size, bp->b_refcnt, bp->b_flags & B_DIRTY ? "dirty" : "clean",
1218             (intmax_t) bp->b_index);
1219 }
1220
1221 /*
1222  * An unexpected inconsistency occurred.
1223  * Die if preening or file system is running with soft dependency protocol,
1224  * otherwise just print message and continue.
1225  */
1226 void
1227 pfatal(const char *fmt, ...)
1228 {
1229         va_list ap;
1230         va_start(ap, fmt);
1231         if (!preen) {
1232                 (void)vfprintf(stdout, fmt, ap);
1233                 va_end(ap);
1234                 if (usedsoftdep)
1235                         (void)fprintf(stdout,
1236                             "\nUNEXPECTED SOFT UPDATE INCONSISTENCY\n");
1237                 /*
1238                  * Force foreground fsck to clean up inconsistency.
1239                  */
1240                 if (bkgrdflag) {
1241                         cmd.value = FS_NEEDSFSCK;
1242                         cmd.size = 1;
1243                         if (sysctlbyname("vfs.ffs.setflags", 0, 0,
1244                             &cmd, sizeof cmd) == -1)
1245                                 pwarn("CANNOT SET FS_NEEDSFSCK FLAG\n");
1246                         fprintf(stdout, "CANNOT RUN IN BACKGROUND\n");
1247                         ckfini(0);
1248                         exit(EEXIT);
1249                 }
1250                 return;
1251         }
1252         if (cdevname == NULL)
1253                 cdevname = strdup("fsck");
1254         (void)fprintf(stdout, "%s: ", cdevname);
1255         (void)vfprintf(stdout, fmt, ap);
1256         (void)fprintf(stdout,
1257             "\n%s: UNEXPECTED%sINCONSISTENCY; RUN fsck MANUALLY.\n",
1258             cdevname, usedsoftdep ? " SOFT UPDATE " : " ");
1259         /*
1260          * Force foreground fsck to clean up inconsistency.
1261          */
1262         if (bkgrdflag) {
1263                 cmd.value = FS_NEEDSFSCK;
1264                 cmd.size = 1;
1265                 if (sysctlbyname("vfs.ffs.setflags", 0, 0,
1266                     &cmd, sizeof cmd) == -1)
1267                         pwarn("CANNOT SET FS_NEEDSFSCK FLAG\n");
1268         }
1269         ckfini(0);
1270         exit(EEXIT);
1271 }
1272
1273 /*
1274  * Pwarn just prints a message when not preening or running soft dependency
1275  * protocol, or a warning (preceded by filename) when preening.
1276  */
1277 void
1278 pwarn(const char *fmt, ...)
1279 {
1280         va_list ap;
1281         va_start(ap, fmt);
1282         if (preen)
1283                 (void)fprintf(stdout, "%s: ", cdevname);
1284         (void)vfprintf(stdout, fmt, ap);
1285         va_end(ap);
1286 }
1287
1288 /*
1289  * Stub for routines from kernel.
1290  */
1291 void
1292 panic(const char *fmt, ...)
1293 {
1294         va_list ap;
1295         va_start(ap, fmt);
1296         pfatal("INTERNAL INCONSISTENCY:");
1297         (void)vfprintf(stdout, fmt, ap);
1298         va_end(ap);
1299         exit(EEXIT);
1300 }