sbin/fsck/pass4.c

/*
 * Copyright (c) 1980, 1986 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.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *      This product includes software developed by the University of
 *      California, Berkeley and its contributors.
 * 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.
 */

#ifndef lint
static char sccsid[] = "@(#)pass4.c     5.10 (Berkeley) 7/20/90";
static char rcsid[] = "$Header: /b/source/CVS/src/sbin/fsck/pass4.c,v 1.3 1993/03/23 00:28:07 cgd Exp $";
#endif /* not lint */

#include <sys/param.h>
#include <ufs/dinode.h>
#include <ufs/fs.h>
#include <stdlib.h>
#include <string.h>
#include "fsck.h"

int     pass4check();

pass4()
{
        register ino_t inumber;
        register struct zlncnt *zlnp;
        struct dinode *dp;
        struct inodesc idesc;
        int n;

        bzero((char *)&idesc, sizeof(struct inodesc));
        idesc.id_type = ADDR;
        idesc.id_func = pass4check;
        for (inumber = ROOTINO; inumber <= lastino; inumber++) {
                idesc.id_number = inumber;
                switch (statemap[inumber]) {

                case FSTATE:
                case DFOUND:
                        n = lncntp[inumber];
                        if (n)
                                adjust(&idesc, (short)n);
                        else {
                                for (zlnp = zlnhead; zlnp; zlnp = zlnp->next)
                                        if (zlnp->zlncnt == inumber) {
                                                zlnp->zlncnt = zlnhead->zlncnt;
                                                zlnp = zlnhead;
                                                zlnhead = zlnhead->next;
                                                free((char *)zlnp);
                                                clri(&idesc, "UNREF", 1);
                                                break;
                                        }
                        }
                        break;

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

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

                case USTATE:
                        break;

                default:
                        errexit("BAD STATE %d FOR INODE I=%d",
                            statemap[inumber], inumber);
                }
        }
}

pass4check(idesc)
        register struct inodesc *idesc;
{
        register struct dups *dlp;
        int nfrags, res = KEEPON;
        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);
}