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pass4.c

/*
 * Copyright (c) 1980, 1986, 1993
 *    The Regents of the University of California.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 4. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

#if 0
#ifndef lint
static const char sccsid[] = "@(#)pass4.c 8.4 (Berkeley) 4/28/95";
#endif /* not lint */
#endif
#include <sys/cdefs.h>
__FBSDID("$FreeBSD: src/sbin/fsck_ffs/pass4.c,v 1.15 2004/10/08 20:44:47 truckman Exp $");

#include <sys/param.h>

#include <ufs/ufs/dinode.h>
#include <ufs/ffs/fs.h>

#include <err.h>
#include <string.h>

#include "fsck.h"

void
pass4(void)
{
      ino_t inumber;
      union dinode *dp;
      struct inodesc idesc;
      int i, n, cg;

      memset(&idesc, 0, sizeof(struct inodesc));
      idesc.id_type = ADDR;
      idesc.id_func = pass4check;
      for (cg = 0; cg < sblock.fs_ncg; cg++) {
            if (got_siginfo) {
                  printf("%s: phase 4: cyl group %d of %d (%d%%)\n",
                      cdevname, cg, sblock.fs_ncg,
                      cg * 100 / sblock.fs_ncg);
                  got_siginfo = 0;
            }
            if (got_sigalarm) {
                  setproctitle("%s p4 %d%%", cdevname,
                      cg * 100 / sblock.fs_ncg);
                  got_sigalarm = 0;
            }
            inumber = cg * sblock.fs_ipg;
            for (i = 0; i < inostathead[cg].il_numalloced; i++, inumber++) {
                  if (inumber < ROOTINO)
                        continue;
                  idesc.id_number = inumber;
                  switch (inoinfo(inumber)->ino_state) {

                  case FZLINK:
                  case DZLINK:
                        if (inoinfo(inumber)->ino_linkcnt == 0) {
                              clri(&idesc, "UNREF", 1);
                              break;
                        }
                        /* fall through */

                  case FSTATE:
                  case DFOUND:
                        n = inoinfo(inumber)->ino_linkcnt;
                        if (n) {
                              adjust(&idesc, (short)n);
                              break;
                        }
                        break;

                  case DSTATE:
                        clri(&idesc, "UNREF", 1);
                        break;

                  case DCLEAR:
                        dp = ginode(inumber);
                        if (DIP(dp, di_size) == 0) {
                              clri(&idesc, "ZERO LENGTH", 1);
                              break;
                        }
                        /* fall through */
                  case FCLEAR:
                        clri(&idesc, "BAD/DUP", 1);
                        break;

                  case USTATE:
                        break;

                  default:
                        errx(EEXIT, "BAD STATE %d FOR INODE I=%d",
                            inoinfo(inumber)->ino_state, inumber);
                  }
            }
      }
}

int
pass4check(struct inodesc *idesc)
{
      struct dups *dlp;
      int nfrags, res = KEEPON;
      ufs2_daddr_t blkno = idesc->id_blkno;

      for (nfrags = idesc->id_numfrags; nfrags > 0; blkno++, nfrags--) {
            if (chkrange(blkno, 1)) {
                  res = SKIP;
            } else if (testbmap(blkno)) {
                  for (dlp = duplist; dlp; dlp = dlp->next) {
                        if (dlp->dup != blkno)
                              continue;
                        dlp->dup = duplist->dup;
                        dlp = duplist;
                        duplist = duplist->next;
                        free((char *)dlp);
                        break;
                  }
                  if (dlp == 0) {
                        clrbmap(blkno);
                        n_blks--;
                  }
            }
      }
      return (res);
}

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