1 /* $OpenBSD: pass4.c,v 1.10 2015/01/16 06:39:57 deraadt Exp $ */
2 /* $NetBSD: pass4.c,v 1.2 1997/09/14 14:27:29 lukem Exp $ */
3
4 /*
5 * Copyright (c) 1997 Manuel Bouyer.
6 * Copyright (c) 1980, 1986, 1993
7 * The Regents of the University of California. All rights reserved.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
17 * 3. 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 #include <sys/param.h> /* isset clrbit */
35 #include <sys/time.h>
36 #include <ufs/ext2fs/ext2fs_dinode.h>
37 #include <ufs/ext2fs/ext2fs.h>
38 #include <stdlib.h>
39 #include <string.h>
40
41 #include "fsutil.h"
42 #include "fsck.h"
43 #include "extern.h"
44
45 void
pass4(void)46 pass4(void)
47 {
48 ino_t inumber;
49 struct zlncnt *zlnp;
50 struct ext2fs_dinode *dp;
51 struct inodesc idesc;
52 int n;
53
54 memset(&idesc, 0, sizeof(struct inodesc));
55 idesc.id_type = ADDR;
56 idesc.id_func = pass4check;
57 for (inumber = EXT2_ROOTINO; inumber <= lastino; inumber++) {
58 if (inumber < EXT2_FIRSTINO && inumber > EXT2_ROOTINO)
59 continue;
60 idesc.id_number = inumber;
61 switch (statemap[inumber]) {
62
63 case FSTATE:
64 case DFOUND:
65 n = lncntp[inumber];
66 if (n)
67 adjust(&idesc, (short)n);
68 else {
69 for (zlnp = zlnhead; zlnp; zlnp = zlnp->next)
70 if (zlnp->zlncnt == inumber) {
71 zlnp->zlncnt = zlnhead->zlncnt;
72 zlnp = zlnhead;
73 zlnhead = zlnhead->next;
74 free((char *)zlnp);
75 clri(&idesc, "UNREF", 1);
76 break;
77 }
78 }
79 break;
80
81 case DSTATE:
82 clri(&idesc, "UNREF", 1);
83 break;
84
85 case DCLEAR:
86 dp = ginode(inumber);
87 if (inosize(dp) == 0) {
88 clri(&idesc, "ZERO LENGTH", 1);
89 break;
90 }
91 /* fall through */
92 case FCLEAR:
93 clri(&idesc, "BAD/DUP", 1);
94 break;
95
96 case USTATE:
97 break;
98
99 default:
100 errexit("BAD STATE %d FOR INODE I=%llu\n",
101 statemap[inumber], (unsigned long long)inumber);
102 }
103 }
104 }
105
106 int
pass4check(struct inodesc * idesc)107 pass4check(struct inodesc *idesc)
108 {
109 struct dups *dlp;
110 int nfrags, res = KEEPON;
111 daddr32_t blkno = idesc->id_blkno;
112
113 for (nfrags = idesc->id_numfrags; nfrags > 0; blkno++, nfrags--) {
114 if (chkrange(blkno, 1)) {
115 res = SKIP;
116 } else if (testbmap(blkno)) {
117 for (dlp = duplist; dlp; dlp = dlp->next) {
118 if (dlp->dup != blkno)
119 continue;
120 dlp->dup = duplist->dup;
121 dlp = duplist;
122 duplist = duplist->next;
123 free((char *)dlp);
124 break;
125 }
126 if (dlp == 0) {
127 clrbmap(blkno);
128 n_blks--;
129 }
130 }
131 }
132 return (res);
133 }
134