xref: /freebsd/sbin/fsck_ffs/pass3.c (revision b0b1dbdd)
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. 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[] = "@(#)pass3.c	8.2 (Berkeley) 4/27/95";
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/ufs/dir.h>
42 #include <ufs/ffs/fs.h>
43 
44 #include <string.h>
45 
46 #include "fsck.h"
47 
48 void
49 pass3(void)
50 {
51 	struct inoinfo *inp;
52 	int loopcnt, inpindex, state;
53 	ino_t orphan;
54 	struct inodesc idesc;
55 	char namebuf[UFS_MAXNAMLEN+1];
56 
57 	for (inpindex = inplast - 1; inpindex >= 0; inpindex--) {
58 		if (got_siginfo) {
59 			printf("%s: phase 3: dir %d of %d (%d%%)\n", cdevname,
60 			    (int)(inplast - inpindex - 1), (int)inplast,
61 			    (int)((inplast - inpindex - 1) * 100 / inplast));
62 			got_siginfo = 0;
63 		}
64 		if (got_sigalarm) {
65 			setproctitle("%s p3 %d%%", cdevname,
66 			    (int)((inplast - inpindex - 1) * 100 / inplast));
67 			got_sigalarm = 0;
68 		}
69 		inp = inpsort[inpindex];
70 		state = inoinfo(inp->i_number)->ino_state;
71 		if (inp->i_number == UFS_ROOTINO ||
72 		    (inp->i_parent != 0 && !S_IS_DUNFOUND(state)))
73 			continue;
74 		if (state == DCLEAR)
75 			continue;
76 		/*
77 		 * If we are running with soft updates and we come
78 		 * across unreferenced directories, we just leave
79 		 * them in DSTATE which will cause them to be pitched
80 		 * in pass 4.
81 		 */
82 		if ((preen || bkgrdflag) &&
83 		    resolved && usedsoftdep && S_IS_DUNFOUND(state)) {
84 			if (inp->i_dotdot >= UFS_ROOTINO)
85 				inoinfo(inp->i_dotdot)->ino_linkcnt++;
86 			continue;
87 		}
88 		for (loopcnt = 0; ; loopcnt++) {
89 			orphan = inp->i_number;
90 			if (inp->i_parent == 0 ||
91 			    !INO_IS_DUNFOUND(inp->i_parent) ||
92 			    loopcnt > countdirs)
93 				break;
94 			inp = getinoinfo(inp->i_parent);
95 		}
96 		if (loopcnt <= countdirs) {
97 			if (linkup(orphan, inp->i_dotdot, NULL)) {
98 				inp->i_parent = inp->i_dotdot = lfdir;
99 				inoinfo(lfdir)->ino_linkcnt--;
100 			}
101 			inoinfo(orphan)->ino_state = DFOUND;
102 			propagate();
103 			continue;
104 		}
105 		pfatal("ORPHANED DIRECTORY LOOP DETECTED I=%lu",
106 		    (u_long)orphan);
107 		if (reply("RECONNECT") == 0)
108 			continue;
109 		memset(&idesc, 0, sizeof(struct inodesc));
110 		idesc.id_type = DATA;
111 		idesc.id_number = inp->i_parent;
112 		idesc.id_parent = orphan;
113 		idesc.id_func = findname;
114 		idesc.id_name = namebuf;
115 		if ((ckinode(ginode(inp->i_parent), &idesc) & FOUND) == 0)
116 			pfatal("COULD NOT FIND NAME IN PARENT DIRECTORY");
117 		if (linkup(orphan, inp->i_parent, namebuf)) {
118 			idesc.id_func = clearentry;
119 			if (ckinode(ginode(inp->i_parent), &idesc) & FOUND)
120 				inoinfo(orphan)->ino_linkcnt++;
121 			inp->i_parent = inp->i_dotdot = lfdir;
122 			inoinfo(lfdir)->ino_linkcnt--;
123 		}
124 		inoinfo(orphan)->ino_state = DFOUND;
125 		propagate();
126 	}
127 }
128