sbin/fsck/pass4.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  * @(#)pass4.c  8.4 (Berkeley) 4/28/95
  30  * $FreeBSD: src/sbin/fsck/pass4.c,v 1.7.2.1 2001/01/23 23:11:07 iedowse Exp $
  31  */
  32
  33 #include <sys/param.h>
  34
  35 #include <vfs/ufs/dinode.h>
  36 #include <vfs/ufs/fs.h>
  37
  38 #include <err.h>
  39 #include <string.h>
  40
  41 #include "fsck.h"
  42
  43 void
  44 pass4(void)
  45 {
  46         ufs1_ino_t inumber;
  47         struct zlncnt *zlnp;
  48         struct ufs1_dinode *dp;
  49         struct inodesc idesc;
  50         int i, n, cg;
  51
  52         memset(&idesc, 0, sizeof(struct inodesc));
  53         idesc.id_type = ADDR;
  54         idesc.id_func = pass4check;
  55         for (cg = 0; cg < sblock.fs_ncg; cg++) {
  56                 if (got_siginfo) {
  57                         printf("%s: phase 4: cyl group %d of %d (%d%%)\n",
  58                             cdevname, cg, sblock.fs_ncg,
  59                             cg * 100 / sblock.fs_ncg);
  60                         got_siginfo = 0;
  61                 }
  62                 inumber = cg * sblock.fs_ipg;
  63                 for (i = 0; i < inostathead[cg].il_numalloced; i++, inumber++) {
  64                         if (inumber < ROOTINO)
  65                                 continue;
  66                         idesc.id_number = inumber;
  67                         switch (inoinfo(inumber)->ino_state) {
  68
  69                         case FSTATE:
  70                         case DFOUND:
  71                                 n = inoinfo(inumber)->ino_linkcnt;
  72                                 if (n) {
  73                                         adjust(&idesc, (short)n);
  74                                         break;
  75                                 }
  76                                 for (zlnp = zlnhead; zlnp; zlnp = zlnp->next) {
  77                                         if (zlnp->zlncnt == inumber) {
  78                                                 zlnp->zlncnt = zlnhead->zlncnt;
  79                                                 zlnp = zlnhead;
  80                                                 zlnhead = zlnhead->next;
  81                                                 free((char *)zlnp);
  82                                                 clri(&idesc, "UNREF", 1);
  83                                                 break;
  84                                         }
  85                                 }
  86                                 break;
  87
  88                         case DSTATE:
  89                                 clri(&idesc, "UNREF", 1);
  90                                 break;
  91
  92                         case DCLEAR:
  93                                 dp = ginode(inumber);
  94                                 if (dp->di_size == 0) {
  95                                         clri(&idesc, "ZERO LENGTH", 1);
  96                                         break;
  97                                 }
  98                                 /* fall through */
  99                         case FCLEAR:
 100                                 clri(&idesc, "BAD/DUP", 1);
 101                                 break;
 102
 103                         case USTATE:
 104                                 break;
 105
 106                         default:
 107                                 errx(EEXIT, "BAD STATE %d FOR INODE I=%d",
 108                                     inoinfo(inumber)->ino_state, inumber);
 109                         }
 110                 }
 111         }
 112 }
 113
 114 int
 115 pass4check(struct inodesc *idesc)
 116 {
 117         struct dups *dlp;
 118         int nfrags, res = KEEPON;
 119         ufs_daddr_t blkno = idesc->id_blkno;
 120
 121         for (nfrags = idesc->id_numfrags; nfrags > 0; blkno++, nfrags--) {
 122                 if (chkrange(blkno, 1)) {
 123                         res = SKIP;
 124                 } else if (testbmap(blkno)) {
 125                         for (dlp = duplist; dlp; dlp = dlp->next) {
 126                                 if (dlp->dup != blkno)
 127                                         continue;
 128                                 dlp->dup = duplist->dup;
 129                                 dlp = duplist;
 130                                 duplist = duplist->next;
 131                                 free((char *)dlp);
 132                                 break;
 133                         }
 134                         if (dlp == NULL) {
 135                                 clrbmap(blkno);
 136                                 n_blks--;
 137                         }
 138                 }
 139         }
 140         return (res);
 141 }