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pass4.c revision 1.10 
      1 /*	$NetBSD: pass4.c,v 1.10 1996/09/23 16:18:38 christos Exp $	*/
      2 
      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. All advertising materials mentioning features or use of this software
     16  *    must display the following acknowledgement:
     17  *	This product includes software developed by the University of
     18  *	California, Berkeley and its contributors.
     19  * 4. Neither the name of the University nor the names of its contributors
     20  *    may be used to endorse or promote products derived from this software
     21  *    without specific prior written permission.
     22  *
     23  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     24  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     25  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     26  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     27  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     28  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     29  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     30  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     31  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     32  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     33  * SUCH DAMAGE.
     34  */
     35 
     36 #ifndef lint
     37 #if 0
     38 static char sccsid[] = "@(#)pass4.c	8.1 (Berkeley) 6/5/93";
     39 #else
     40 static char rcsid[] = "$NetBSD: pass4.c,v 1.10 1996/09/23 16:18:38 christos Exp $";
     41 #endif
     42 #endif /* not lint */
     43 
     44 #include <sys/param.h>
     45 #include <sys/time.h>
     46 #include <ufs/ufs/dinode.h>
     47 #include <ufs/ffs/fs.h>
     48 #include <stdlib.h>
     49 #include <string.h>
     50 
     51 #include "util.h"
     52 #include "fsck.h"
     53 #include "extern.h"
     54 
     55 void
     56 pass4()
     57 {
     58 	register ino_t inumber;
     59 	register struct zlncnt *zlnp;
     60 	struct dinode *dp;
     61 	struct inodesc idesc;
     62 	int n;
     63 
     64 	memset(&idesc, 0, sizeof(struct inodesc));
     65 	idesc.id_type = ADDR;
     66 	idesc.id_func = pass4check;
     67 	for (inumber = ROOTINO; inumber <= lastino; inumber++) {
     68 		idesc.id_number = inumber;
     69 		switch (statemap[inumber]) {
     70 
     71 		case FSTATE:
     72 		case DFOUND:
     73 			n = lncntp[inumber];
     74 			if (n)
     75 				adjust(&idesc, (short)n);
     76 			else {
     77 				for (zlnp = zlnhead; zlnp; zlnp = zlnp->next)
     78 					if (zlnp->zlncnt == inumber) {
     79 						zlnp->zlncnt = zlnhead->zlncnt;
     80 						zlnp = zlnhead;
     81 						zlnhead = zlnhead->next;
     82 						free((char *)zlnp);
     83 						clri(&idesc, "UNREF", 1);
     84 						break;
     85 					}
     86 			}
     87 			break;
     88 
     89 		case DSTATE:
     90 			clri(&idesc, "UNREF", 1);
     91 			break;
     92 
     93 		case DCLEAR:
     94 			dp = ginode(inumber);
     95 			if (dp->di_size == 0) {
     96 				clri(&idesc, "ZERO LENGTH", 1);
     97 				break;
     98 			}
     99 			/* fall through */
    100 		case FCLEAR:
    101 			clri(&idesc, "BAD/DUP", 1);
    102 			break;
    103 
    104 		case USTATE:
    105 			break;
    106 
    107 		default:
    108 			errexit("BAD STATE %d FOR INODE I=%d",
    109 			    statemap[inumber], inumber);
    110 		}
    111 	}
    112 }
    113 
    114 int
    115 pass4check(idesc)
    116 	register struct inodesc *idesc;
    117 {
    118 	register struct dups *dlp;
    119 	int nfrags, res = KEEPON;
    120 	daddr_t blkno = idesc->id_blkno;
    121 
    122 	for (nfrags = idesc->id_numfrags; nfrags > 0; blkno++, nfrags--) {
    123 		if (chkrange(blkno, 1)) {
    124 			res = SKIP;
    125 		} else if (testbmap(blkno)) {
    126 			for (dlp = duplist; dlp; dlp = dlp->next) {
    127 				if (dlp->dup != blkno)
    128 					continue;
    129 				dlp->dup = duplist->dup;
    130 				dlp = duplist;
    131 				duplist = duplist->next;
    132 				free((char *)dlp);
    133 				break;
    134 			}
    135 			if (dlp == 0) {
    136 				clrbmap(blkno);
    137 				n_blks--;
    138 			}
    139 		}
    140 	}
    141 	return (res);
    142 }
    143