sbin/fsck_ffs/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
  30 #if 0
  31 #ifndef lint
  32 static const char sccsid[] = "@(#)pass4.c       8.4 (Berkeley) 4/28/95";
  33 #endif /* not lint */
  34 #endif
  35 #include <sys/cdefs.h>
  36 __FBSDID("$FreeBSD$");
  37
  38 #include <sys/param.h>
  39
  40 #include <ufs/ufs/dinode.h>
  41 #include <ufs/ffs/fs.h>
  42
  43 #include <err.h>
  44 #include <string.h>
  45
  46 #include "fsck.h"
  47
  48 void
  49 pass4(void)
  50 {
  51         ino_t inumber;
  52         union dinode *dp;
  53         struct inodesc idesc;
  54         int i, n, cg;
  55
  56         memset(&idesc, 0, sizeof(struct inodesc));
  57         idesc.id_type = ADDR;
  58         idesc.id_func = pass4check;
  59         for (cg = 0; cg < sblock.fs_ncg; cg++) {
  60                 if (got_siginfo) {
  61                         printf("%s: phase 4: cyl group %d of %d (%d%%)\n",
  62                             cdevname, cg, sblock.fs_ncg,
  63                             cg * 100 / sblock.fs_ncg);
  64                         got_siginfo = 0;
  65                 }
  66                 if (got_sigalarm) {
  67                         setproctitle("%s p4 %d%%", cdevname,
  68                             cg * 100 / sblock.fs_ncg);
  69                         got_sigalarm = 0;
  70                 }
  71                 inumber = cg * sblock.fs_ipg;
  72                 for (i = 0; i < inostathead[cg].il_numalloced; i++, inumber++) {
  73                         if (inumber < ROOTINO)
  74                                 continue;
  75                         idesc.id_number = inumber;
  76                         switch (inoinfo(inumber)->ino_state) {
  77
  78                         case FZLINK:
  79                         case DZLINK:
  80                                 if (inoinfo(inumber)->ino_linkcnt == 0) {
  81                                         clri(&idesc, "UNREF", 1);
  82                                         break;
  83                                 }
  84                                 /* fall through */
  85
  86                         case FSTATE:
  87                         case DFOUND:
  88                                 n = inoinfo(inumber)->ino_linkcnt;
  89                                 if (n) {
  90                                         adjust(&idesc, (short)n);
  91                                         break;
  92                                 }
  93                                 break;
  94
  95                         case DSTATE:
  96                                 clri(&idesc, "UNREF", 1);
  97                                 break;
  98
  99                         case DCLEAR:
 100                                 /* if on snapshot, already cleared */
 101                                 if (cursnapshot != 0)
 102                                         break;
 103                                 dp = ginode(inumber);
 104                                 if (DIP(dp, di_size) == 0) {
 105                                         clri(&idesc, "ZERO LENGTH", 1);
 106                                         break;
 107                                 }
 108                                 /* fall through */
 109                         case FCLEAR:
 110                                 clri(&idesc, "BAD/DUP", 1);
 111                                 break;
 112
 113                         case USTATE:
 114                                 break;
 115
 116                         default:
 117                                 errx(EEXIT, "BAD STATE %d FOR INODE I=%d",
 118                                     inoinfo(inumber)->ino_state, inumber);
 119                         }
 120                 }
 121         }
 122 }
 123
 124 int
 125 pass4check(struct inodesc *idesc)
 126 {
 127         struct dups *dlp;
 128         int nfrags, res = KEEPON;
 129         ufs2_daddr_t blkno = idesc->id_blkno;
 130
 131         for (nfrags = idesc->id_numfrags; nfrags > 0; blkno++, nfrags--) {
 132                 if (chkrange(blkno, 1)) {
 133                         res = SKIP;
 134                 } else if (testbmap(blkno)) {
 135                         for (dlp = duplist; dlp; dlp = dlp->next) {
 136                                 if (dlp->dup != blkno)
 137                                         continue;
 138                                 dlp->dup = duplist->dup;
 139                                 dlp = duplist;
 140                                 duplist = duplist->next;
 141                                 free((char *)dlp);
 142                                 break;
 143                         }
 144                         if (dlp == 0) {
 145                                 clrbmap(blkno);
 146                                 n_blks--;
 147                         }
 148                 }
 149         }
 150         return (res);
 151 }