1/*
2 * Copyright (C) 1995, 1996, 1997 Wolfgang Solfrank
3 * Copyright (c) 1995 Martin Husemann
4 * Some structure declaration borrowed from Paul Popelka
5 * (paulp@uts.amdahl.com), see /sys/msdosfs/ for reference.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS OR
17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
19 * IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY DIRECT, INDIRECT,
20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
21 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
22 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
23 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
25 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26 * $NetBSD: dosfs.h,v 1.4 1997/01/03 14:32:48 ws Exp $
27 * $FreeBSD: head/sbin/fsck_msdosfs/dosfs.h 203872 2010-02-14 12:30:30Z kib $
28 */
29
30#ifndef DOSFS_H
31#define DOSFS_H
32
33#define DOSBOOTBLOCKSIZE 512
34
35typedef u_int32_t cl_t; /* type holding a cluster number */
36
37/*
38 * architecture independent description of all the info stored in a
39 * FAT boot block.
40 */
41struct bootblock {
42 u_int BytesPerSec; /* bytes per sector */
43 u_int SecPerClust; /* sectors per cluster */
44 u_int ResSectors; /* number of reserved sectors */
45 u_int FATs; /* number of FATs */
46 u_int RootDirEnts; /* number of root directory entries */
47 u_int Media; /* media descriptor */
48 u_int FATsmall; /* number of sectors per FAT */
49 u_int SecPerTrack; /* sectors per track */
50 u_int Heads; /* number of heads */
51 u_int32_t HiddenSecs; /* # of hidden sectors */
52 u_int32_t Sectors; /* total number of sectors */
53#define FAT32 1 /* this is a FAT32 file system */
54 /*
55 * Maybe, we should separate out
56 * various parts of FAT32? XXX
57 */
58 u_int32_t HugeSectors; /* # of sectors if bpbSectors == 0 */
59 u_int FSInfo; /* FSInfo sector */
60 u_int Backup; /* Backup of Bootblocks */
61 cl_t RootCl; /* Start of Root Directory */
62 cl_t FSFree; /* Number of free clusters acc. FSInfo */
63 cl_t FSNext; /* Next free cluster acc. FSInfo */
64
65 /* and some more calculated values */
66 u_int flags; /* some flags: */
67 int ValidFat; /* valid fat if FAT32 non-mirrored */
68 cl_t ClustMask; /* mask for entries in FAT */
69 cl_t NumClusters; /* # of entries in a FAT */
70 u_int32_t NumSectors; /* how many sectors are there */
71 u_int32_t FATsecs; /* how many sectors are in FAT */
72 u_int32_t NumFatEntries; /* how many entries really are there */
73 u_int ClusterOffset; /* at what sector would sector 0 start */
74 u_int ClusterSize; /* Cluster size in bytes */
75
76 /* Now some statistics: */
77 u_int NumFiles; /* # of plain files */
78 u_int NumFree; /* # of free clusters */
79 u_int NumBad; /* # of bad clusters */
80};
81
82struct fatEntry {
83 cl_t next; /* pointer to next cluster */
84 cl_t head; /* pointer to start of chain */
85 u_int32_t length; /* number of clusters on chain */
86 int flags; /* see below */
87};
88
89#define CLUST_FREE 0 /* 0 means cluster is free */
90#define CLUST_FIRST 2 /* 2 is the minimum valid cluster number */
91#define CLUST_RSRVD 0xfffffff6 /* start of reserved clusters */
92#define CLUST_BAD 0xfffffff7 /* a cluster with a defect */
93#define CLUST_EOFS 0xfffffff8 /* start of EOF indicators */
94#define CLUST_EOF 0xffffffff /* standard value for last cluster */
95
96/*
97 * Masks for cluster values
98 */
99#define CLUST12_MASK 0xfff
100#define CLUST16_MASK 0xffff
101#define CLUST32_MASK 0xfffffff
102
103#define FAT_USED 1 /* This fat chain is used in a file */
104
105#define DOSLONGNAMELEN 256 /* long name maximal length */
106#define LRFIRST 0x40 /* first long name record */
107#define LRNOMASK 0x1f /* mask to extract long record
108 * sequence number */
109
110/*
111 * Architecture independent description of a directory entry
112 */
113struct dosDirEntry {
114 struct dosDirEntry
115 *parent, /* previous tree level */
116 *next, /* next brother */
117 *child; /* if this is a directory */
118 char name[8+1+3+1]; /* alias name first part */
119 char lname[DOSLONGNAMELEN]; /* real name */
120 uint flags; /* attributes */
121 cl_t head; /* cluster no */
122 u_int32_t size; /* filesize in bytes */
123 uint fsckflags; /* flags during fsck */
124};
125/* Flags in fsckflags: */
126#define DIREMPTY 1
127#define DIREMPWARN 2
128
129/*
130 * TODO-list of unread directories
131 */
132struct dirTodoNode {
133 struct dosDirEntry *dir;
134 struct dirTodoNode *next;
135};
136
137#endif
2 * Copyright (C) 1995, 1996, 1997 Wolfgang Solfrank
3 * Copyright (c) 1995 Martin Husemann
4 * Some structure declaration borrowed from Paul Popelka
5 * (paulp@uts.amdahl.com), see /sys/msdosfs/ for reference.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS OR
17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
19 * IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY DIRECT, INDIRECT,
20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
21 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
22 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
23 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
25 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26 * $NetBSD: dosfs.h,v 1.4 1997/01/03 14:32:48 ws Exp $
27 * $FreeBSD: head/sbin/fsck_msdosfs/dosfs.h 203872 2010-02-14 12:30:30Z kib $
28 */
29
30#ifndef DOSFS_H
31#define DOSFS_H
32
33#define DOSBOOTBLOCKSIZE 512
34
35typedef u_int32_t cl_t; /* type holding a cluster number */
36
37/*
38 * architecture independent description of all the info stored in a
39 * FAT boot block.
40 */
41struct bootblock {
42 u_int BytesPerSec; /* bytes per sector */
43 u_int SecPerClust; /* sectors per cluster */
44 u_int ResSectors; /* number of reserved sectors */
45 u_int FATs; /* number of FATs */
46 u_int RootDirEnts; /* number of root directory entries */
47 u_int Media; /* media descriptor */
48 u_int FATsmall; /* number of sectors per FAT */
49 u_int SecPerTrack; /* sectors per track */
50 u_int Heads; /* number of heads */
51 u_int32_t HiddenSecs; /* # of hidden sectors */
52 u_int32_t Sectors; /* total number of sectors */
53#define FAT32 1 /* this is a FAT32 file system */
54 /*
55 * Maybe, we should separate out
56 * various parts of FAT32? XXX
57 */
58 u_int32_t HugeSectors; /* # of sectors if bpbSectors == 0 */
59 u_int FSInfo; /* FSInfo sector */
60 u_int Backup; /* Backup of Bootblocks */
61 cl_t RootCl; /* Start of Root Directory */
62 cl_t FSFree; /* Number of free clusters acc. FSInfo */
63 cl_t FSNext; /* Next free cluster acc. FSInfo */
64
65 /* and some more calculated values */
66 u_int flags; /* some flags: */
67 int ValidFat; /* valid fat if FAT32 non-mirrored */
68 cl_t ClustMask; /* mask for entries in FAT */
69 cl_t NumClusters; /* # of entries in a FAT */
70 u_int32_t NumSectors; /* how many sectors are there */
71 u_int32_t FATsecs; /* how many sectors are in FAT */
72 u_int32_t NumFatEntries; /* how many entries really are there */
73 u_int ClusterOffset; /* at what sector would sector 0 start */
74 u_int ClusterSize; /* Cluster size in bytes */
75
76 /* Now some statistics: */
77 u_int NumFiles; /* # of plain files */
78 u_int NumFree; /* # of free clusters */
79 u_int NumBad; /* # of bad clusters */
80};
81
82struct fatEntry {
83 cl_t next; /* pointer to next cluster */
84 cl_t head; /* pointer to start of chain */
85 u_int32_t length; /* number of clusters on chain */
86 int flags; /* see below */
87};
88
89#define CLUST_FREE 0 /* 0 means cluster is free */
90#define CLUST_FIRST 2 /* 2 is the minimum valid cluster number */
91#define CLUST_RSRVD 0xfffffff6 /* start of reserved clusters */
92#define CLUST_BAD 0xfffffff7 /* a cluster with a defect */
93#define CLUST_EOFS 0xfffffff8 /* start of EOF indicators */
94#define CLUST_EOF 0xffffffff /* standard value for last cluster */
95
96/*
97 * Masks for cluster values
98 */
99#define CLUST12_MASK 0xfff
100#define CLUST16_MASK 0xffff
101#define CLUST32_MASK 0xfffffff
102
103#define FAT_USED 1 /* This fat chain is used in a file */
104
105#define DOSLONGNAMELEN 256 /* long name maximal length */
106#define LRFIRST 0x40 /* first long name record */
107#define LRNOMASK 0x1f /* mask to extract long record
108 * sequence number */
109
110/*
111 * Architecture independent description of a directory entry
112 */
113struct dosDirEntry {
114 struct dosDirEntry
115 *parent, /* previous tree level */
116 *next, /* next brother */
117 *child; /* if this is a directory */
118 char name[8+1+3+1]; /* alias name first part */
119 char lname[DOSLONGNAMELEN]; /* real name */
120 uint flags; /* attributes */
121 cl_t head; /* cluster no */
122 u_int32_t size; /* filesize in bytes */
123 uint fsckflags; /* flags during fsck */
124};
125/* Flags in fsckflags: */
126#define DIREMPTY 1
127#define DIREMPWARN 2
128
129/*
130 * TODO-list of unread directories
131 */
132struct dirTodoNode {
133 struct dosDirEntry *dir;
134 struct dirTodoNode *next;
135};
136
137#endif