pass4.c revision 23675 
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 * 3. All advertising materials mentioning features or use of this software
14 *    must display the following acknowledgement:
15 *	This product includes software developed by the University of
16 *	California, Berkeley and its contributors.
17 * 4. Neither the name of the University nor the names of its contributors
18 *    may be used to endorse or promote products derived from this software
19 *    without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 */
33
34#ifndef lint
35static const char sccsid[] = "@(#)pass4.c	8.4 (Berkeley) 4/28/95";
36#endif /* not lint */
37
38#include <sys/param.h>
39#include <sys/time.h>
40
41#include <ufs/ufs/dinode.h>
42#include <ufs/ffs/fs.h>
43
44#include <err.h>
45#include <string.h>
46
47#include "fsck.h"
48
49void
50pass4()
51{
52	register ino_t inumber;
53	register struct zlncnt *zlnp;
54	struct dinode *dp;
55	struct inodesc idesc;
56	int n;
57
58	memset(&idesc, 0, sizeof(struct inodesc));
59	idesc.id_type = ADDR;
60	idesc.id_func = pass4check;
61	for (inumber = ROOTINO; inumber <= lastino; inumber++) {
62		idesc.id_number = inumber;
63		switch (statemap[inumber]) {
64
65		case FSTATE:
66		case DFOUND:
67			n = lncntp[inumber];
68			if (n)
69				adjust(&idesc, (short)n);
70			else {
71				for (zlnp = zlnhead; zlnp; zlnp = zlnp->next)
72					if (zlnp->zlncnt == inumber) {
73						zlnp->zlncnt = zlnhead->zlncnt;
74						zlnp = zlnhead;
75						zlnhead = zlnhead->next;
76						free((char *)zlnp);
77						clri(&idesc, "UNREF", 1);
78						break;
79					}
80			}
81			break;
82
83		case DSTATE:
84			clri(&idesc, "UNREF", 1);
85			break;
86
87		case DCLEAR:
88			dp = ginode(inumber);
89			if (dp->di_size == 0) {
90				clri(&idesc, "ZERO LENGTH", 1);
91				break;
92			}
93			/* fall through */
94		case FCLEAR:
95			clri(&idesc, "BAD/DUP", 1);
96			break;
97
98		case USTATE:
99			break;
100
101		default:
102			errx(EEXIT, "BAD STATE %d FOR INODE I=%d",
103			    statemap[inumber], inumber);
104		}
105	}
106}
107
108int
109pass4check(idesc)
110	register struct inodesc *idesc;
111{
112	register struct dups *dlp;
113	int nfrags, res = KEEPON;
114	ufs_daddr_t blkno = idesc->id_blkno;
115
116	for (nfrags = idesc->id_numfrags; nfrags > 0; blkno++, nfrags--) {
117		if (chkrange(blkno, 1)) {
118			res = SKIP;
119		} else if (testbmap(blkno)) {
120			for (dlp = duplist; dlp; dlp = dlp->next) {
121				if (dlp->dup != blkno)
122					continue;
123				dlp->dup = duplist->dup;
124				dlp = duplist;
125				duplist = duplist->next;
126				free((char *)dlp);
127				break;
128			}
129			if (dlp == 0) {
130				clrbmap(blkno);
131				n_blks--;
132			}
133		}
134	}
135	return (res);
136}
137