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pass4.c revision 1.12 
      1 /*	$NetBSD: pass4.c,v 1.12 1997/09/14 14:36:36 lukem 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 #include <sys/cdefs.h>
     37 #ifndef lint
     38 #if 0
     39 static char sccsid[] = "@(#)pass4.c	8.1 (Berkeley) 6/5/93";
     40 #else
     41 __RCSID("$NetBSD: pass4.c,v 1.12 1997/09/14 14:36:36 lukem Exp $");
     42 #endif
     43 #endif /* not lint */
     44 
     45 #include <sys/param.h>
     46 #include <sys/time.h>
     47 #include <ufs/ufs/dinode.h>
     48 #include <ufs/ffs/fs.h>
     49 #include <stdlib.h>
     50 #include <string.h>
     51 
     52 #include "fsutil.h"
     53 #include "fsck.h"
     54 #include "extern.h"
     55 
     56 void
     57 pass4()
     58 {
     59 	ino_t inumber;
     60 	struct zlncnt *zlnp;
     61 	struct dinode *dp;
     62 	struct inodesc idesc;
     63 	int n;
     64 
     65 	memset(&idesc, 0, sizeof(struct inodesc));
     66 	idesc.id_type = ADDR;
     67 	idesc.id_func = pass4check;
     68 	for (inumber = ROOTINO; inumber <= lastino; inumber++) {
     69 		idesc.id_number = inumber;
     70 		switch (statemap[inumber]) {
     71 
     72 		case FSTATE:
     73 		case DFOUND:
     74 			n = lncntp[inumber];
     75 			if (n)
     76 				adjust(&idesc, (short)n);
     77 			else {
     78 				for (zlnp = zlnhead; zlnp; zlnp = zlnp->next)
     79 					if (zlnp->zlncnt == inumber) {
     80 						zlnp->zlncnt = zlnhead->zlncnt;
     81 						zlnp = zlnhead;
     82 						zlnhead = zlnhead->next;
     83 						free((char *)zlnp);
     84 						clri(&idesc, "UNREF", 1);
     85 						break;
     86 					}
     87 			}
     88 			break;
     89 
     90 		case DSTATE:
     91 			clri(&idesc, "UNREF", 1);
     92 			break;
     93 
     94 		case DCLEAR:
     95 			dp = ginode(inumber);
     96 			if (dp->di_size == 0) {
     97 				clri(&idesc, "ZERO LENGTH", 1);
     98 				break;
     99 			}
    100 			/* fall through */
    101 		case FCLEAR:
    102 			clri(&idesc, "BAD/DUP", 1);
    103 			break;
    104 
    105 		case USTATE:
    106 			break;
    107 
    108 		default:
    109 			errexit("BAD STATE %d FOR INODE I=%d",
    110 			    statemap[inumber], inumber);
    111 		}
    112 	}
    113 }
    114 
    115 int
    116 pass4check(idesc)
    117 	struct inodesc *idesc;
    118 {
    119 	struct dups *dlp;
    120 	int nfrags, res = KEEPON;
    121 	daddr_t blkno = idesc->id_blkno;
    122 
    123 	for (nfrags = idesc->id_numfrags; nfrags > 0; blkno++, nfrags--) {
    124 		if (chkrange(blkno, 1)) {
    125 			res = SKIP;
    126 		} else if (testbmap(blkno)) {
    127 			for (dlp = duplist; dlp; dlp = dlp->next) {
    128 				if (dlp->dup != blkno)
    129 					continue;
    130 				dlp->dup = duplist->dup;
    131 				dlp = duplist;
    132 				duplist = duplist->next;
    133 				free((char *)dlp);
    134 				break;
    135 			}
    136 			if (dlp == 0) {
    137 				clrbmap(blkno);
    138 				n_blks--;
    139 			}
    140 		}
    141 	}
    142 	return (res);
    143 }
    144