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58d4c6c fsck_msdos: Initial checkin
San Mehat authored
1 /*
2 * Copyright (C) 1995, 1996, 1997 Wolfgang Solfrank
3 * Copyright (c) 1995 Martin Husemann
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 Martin Husemann
16 * and Wolfgang Solfrank.
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 AUTHORS ``AS IS'' AND ANY EXPRESS OR
22 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
23 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
24 * IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY DIRECT, INDIRECT,
25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
26 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
27 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
28 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
29 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
30 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
31 * $NetBSD: ext.h,v 1.6 2000/04/25 23:02:51 jdolecek Exp $
32 * $FreeBSD: src/sbin/fsck_msdosfs/ext.h,v 1.10.20.1 2009/04/15 03:14:26 kensmith Exp $
33 */
34
35 #ifndef EXT_H
36 #define EXT_H
37
38 #include <sys/types.h>
39
40 #include "dosfs.h"
41
42 #define LOSTDIR "LOST.DIR"
43
44 /*
45 * Options:
46 */
47 extern int alwaysno; /* assume "no" for all questions */
48 extern int alwaysyes; /* assume "yes" for all questions */
49 extern int preen; /* we are preening */
50 extern int rdonly; /* device is opened read only (supersedes above) */
51 extern int skipclean; /* skip clean file systems if preening */
52
53 extern struct dosDirEntry *rootDir;
54
55 /*
56 * function declarations
57 */
58 int ask(int, const char *, ...);
59
60 /*
61 * Check the dirty flag. If the file system is clean, then return 1.
62 * Otherwise, return 0 (this includes the case of FAT12 file systems --
63 * they have no dirty flag, so they must be assumed to be unclean).
64 */
65 int checkdirty(int, struct bootblock *);
66
67 /*
68 * Check file system given as arg
69 */
70 int checkfilesys(const char *);
71
72 /*
73 * Return values of various functions
74 */
75 #define FSOK 0 /* Check was OK */
76 #define FSBOOTMOD 1 /* Boot block was modified */
77 #define FSDIRMOD 2 /* Some directory was modified */
78 #define FSFATMOD 4 /* The FAT was modified */
79 #define FSERROR 8 /* Some unrecovered error remains */
80 #define FSFATAL 16 /* Some unrecoverable error occured */
81 #define FSDIRTY 32 /* File system is dirty */
82 #define FSFIXFAT 64 /* Fix file system FAT */
83
84 /*
85 * read a boot block in a machine independend fashion and translate
86 * it into our struct bootblock.
87 */
88 int readboot(int, struct bootblock *);
89
90 /*
91 * Correct the FSInfo block.
92 */
93 int writefsinfo(int, struct bootblock *);
94
95 /*
96 * Read one of the FAT copies and return a pointer to the new
97 * allocated array holding our description of it.
98 */
99 int readfat(int, struct bootblock *, int, struct fatEntry **);
100
101 /*
102 * Check two FAT copies for consistency and merge changes into the
103 * first if neccessary.
104 */
105 int comparefat(struct bootblock *, struct fatEntry *, struct fatEntry *, int);
106
107 /*
108 * Check a FAT
109 */
110 int checkfat(struct bootblock *, struct fatEntry *);
111
112 /*
113 * Write back FAT entries
114 */
115 int writefat(int, struct bootblock *, struct fatEntry *, int);
116
117 /*
118 * Read a directory
119 */
120 int resetDosDirSection(struct bootblock *, struct fatEntry *);
121 void finishDosDirSection(void);
122 int handleDirTree(int, struct bootblock *, struct fatEntry *);
123
124 /*
125 * Cross-check routines run after everything is completely in memory
126 */
127 /*
128 * Check for lost cluster chains
129 */
130 int checklost(int, struct bootblock *, struct fatEntry *);
131 /*
132 * Try to reconnect a lost cluster chain
133 */
134 int reconnect(int, struct bootblock *, struct fatEntry *, cl_t);
135 void finishlf(void);
136
137 /*
138 * Small helper functions
139 */
140 /*
141 * Return the type of a reserved cluster as text
142 */
143 char *rsrvdcltype(cl_t);
144
145 /*
146 * Clear a cluster chain in a FAT
147 */
148 void clearchain(struct bootblock *, struct fatEntry *, cl_t);
149
150 #endif
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