xref: /freebsd/sbin/fsck_ffs/pass4.c (revision d9f0ce31900a48d1a2bfc1c8c86f79d1e831451a)
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  * 4. Neither the name of the University nor the names of its contributors
14  *    may be used to endorse or promote products derived from this software
15  *    without specific prior written permission.
16  *
17  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27  * SUCH DAMAGE.
28  */
29 
30 #if 0
31 #ifndef lint
32 static const char sccsid[] = "@(#)pass4.c	8.4 (Berkeley) 4/28/95";
33 #endif /* not lint */
34 #endif
35 #include <sys/cdefs.h>
36 __FBSDID("$FreeBSD$");
37 
38 #include <sys/param.h>
39 
40 #include <ufs/ufs/dinode.h>
41 #include <ufs/ffs/fs.h>
42 
43 #include <err.h>
44 #include <stdint.h>
45 #include <string.h>
46 
47 #include "fsck.h"
48 
49 void
50 pass4(void)
51 {
52 	ino_t inumber;
53 	union dinode *dp;
54 	struct inodesc idesc;
55 	int i, n, cg;
56 
57 	memset(&idesc, 0, sizeof(struct inodesc));
58 	idesc.id_type = ADDR;
59 	idesc.id_func = pass4check;
60 	for (cg = 0; cg < sblock.fs_ncg; cg++) {
61 		if (got_siginfo) {
62 			printf("%s: phase 4: cyl group %d of %d (%d%%)\n",
63 			    cdevname, cg, sblock.fs_ncg,
64 			    cg * 100 / sblock.fs_ncg);
65 			got_siginfo = 0;
66 		}
67 		if (got_sigalarm) {
68 			setproctitle("%s p4 %d%%", cdevname,
69 			    cg * 100 / sblock.fs_ncg);
70 			got_sigalarm = 0;
71 		}
72 		inumber = cg * sblock.fs_ipg;
73 		for (i = 0; i < inostathead[cg].il_numalloced; i++, inumber++) {
74 			if (inumber < ROOTINO)
75 				continue;
76 			idesc.id_number = inumber;
77 			switch (inoinfo(inumber)->ino_state) {
78 
79 			case FZLINK:
80 			case DZLINK:
81 				if (inoinfo(inumber)->ino_linkcnt == 0) {
82 					clri(&idesc, "UNREF", 1);
83 					break;
84 				}
85 				/* fall through */
86 
87 			case FSTATE:
88 			case DFOUND:
89 				n = inoinfo(inumber)->ino_linkcnt;
90 				if (n) {
91 					adjust(&idesc, (short)n);
92 					break;
93 				}
94 				break;
95 
96 			case DSTATE:
97 				clri(&idesc, "UNREF", 1);
98 				break;
99 
100 			case DCLEAR:
101 				/* if on snapshot, already cleared */
102 				if (cursnapshot != 0)
103 					break;
104 				dp = ginode(inumber);
105 				if (DIP(dp, di_size) == 0) {
106 					clri(&idesc, "ZERO LENGTH", 1);
107 					break;
108 				}
109 				/* fall through */
110 			case FCLEAR:
111 				clri(&idesc, "BAD/DUP", 1);
112 				break;
113 
114 			case USTATE:
115 				break;
116 
117 			default:
118 				errx(EEXIT, "BAD STATE %d FOR INODE I=%ju",
119 				    inoinfo(inumber)->ino_state,
120 				    (uintmax_t)inumber);
121 			}
122 		}
123 	}
124 }
125 
126 int
127 pass4check(struct inodesc *idesc)
128 {
129 	struct dups *dlp;
130 	int nfrags, res = KEEPON;
131 	ufs2_daddr_t blkno = idesc->id_blkno;
132 
133 	for (nfrags = idesc->id_numfrags; nfrags > 0; blkno++, nfrags--) {
134 		if (chkrange(blkno, 1)) {
135 			res = SKIP;
136 		} else if (testbmap(blkno)) {
137 			for (dlp = duplist; dlp; dlp = dlp->next) {
138 				if (dlp->dup != blkno)
139 					continue;
140 				dlp->dup = duplist->dup;
141 				dlp = duplist;
142 				duplist = duplist->next;
143 				free((char *)dlp);
144 				break;
145 			}
146 			if (dlp == NULL) {
147 				clrbmap(blkno);
148 				n_blks--;
149 			}
150 		}
151 	}
152 	return (res);
153 }
154