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pass4.c revision 1.13 
      1 /*	$NetBSD: pass4.c,v 1.13 1997/09/16 16:45:23 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	8.4 (Berkeley) 4/28/95";
     40 #else
     41 __RCSID("$NetBSD: pass4.c,v 1.13 1997/09/16 16:45:23 lukem Exp $");
     42 #endif
     43 #endif /* not lint */
     44 
     45 #include <sys/param.h>
     46 #include <sys/time.h>
     47 
     48 #include <ufs/ufs/dinode.h>
     49 #include <ufs/ffs/fs.h>
     50 
     51 #include <err.h>
     52 #include <string.h>
     53 
     54 #include "fsutil.h"
     55 #include "fsck.h"
     56 #include "extern.h"
     57 
     58 void
     59 pass4()
     60 {
     61 	ino_t inumber;
     62 	struct zlncnt *zlnp;
     63 	struct dinode *dp;
     64 	struct inodesc idesc;
     65 	int n;
     66 
     67 	memset(&idesc, 0, sizeof(struct inodesc));
     68 	idesc.id_type = ADDR;
     69 	idesc.id_func = pass4check;
     70 	for (inumber = ROOTINO; inumber <= lastino; inumber++) {
     71 		idesc.id_number = inumber;
     72 		switch (statemap[inumber]) {
     73 
     74 		case FSTATE:
     75 		case DFOUND:
     76 			n = lncntp[inumber];
     77 			if (n)
     78 				adjust(&idesc, (short)n);
     79 			else {
     80 				for (zlnp = zlnhead; zlnp; zlnp = zlnp->next)
     81 					if (zlnp->zlncnt == inumber) {
     82 						zlnp->zlncnt = zlnhead->zlncnt;
     83 						zlnp = zlnhead;
     84 						zlnhead = zlnhead->next;
     85 						free((char *)zlnp);
     86 						clri(&idesc, "UNREF", 1);
     87 						break;
     88 					}
     89 			}
     90 			break;
     91 
     92 		case DSTATE:
     93 			clri(&idesc, "UNREF", 1);
     94 			break;
     95 
     96 		case DCLEAR:
     97 			dp = ginode(inumber);
     98 			if (dp->di_size == 0) {
     99 				clri(&idesc, "ZERO LENGTH", 1);
    100 				break;
    101 			}
    102 			/* fall through */
    103 		case FCLEAR:
    104 			clri(&idesc, "BAD/DUP", 1);
    105 			break;
    106 
    107 		case USTATE:
    108 			break;
    109 
    110 		default:
    111 			errx(EEXIT, "BAD STATE %d FOR INODE I=%d",
    112 			    statemap[inumber], inumber);
    113 		}
    114 	}
    115 }
    116 
    117 int
    118 pass4check(idesc)
    119 	struct inodesc *idesc;
    120 {
    121 	struct dups *dlp;
    122 	int nfrags, res = KEEPON;
    123 	ufs_daddr_t blkno = idesc->id_blkno;
    124 
    125 	for (nfrags = idesc->id_numfrags; nfrags > 0; blkno++, nfrags--) {
    126 		if (chkrange(blkno, 1)) {
    127 			res = SKIP;
    128 		} else if (testbmap(blkno)) {
    129 			for (dlp = duplist; dlp; dlp = dlp->next) {
    130 				if (dlp->dup != blkno)
    131 					continue;
    132 				dlp->dup = duplist->dup;
    133 				dlp = duplist;
    134 				duplist = duplist->next;
    135 				free((char *)dlp);
    136 				break;
    137 			}
    138 			if (dlp == 0) {
    139 				clrbmap(blkno);
    140 				n_blks--;
    141 			}
    142 		}
    143 	}
    144 	return (res);
    145 }
    146