summaryrefslogtreecommitdiffstats
path: root/dosfstools/src/dosfsck.h
blob: 6f53c72cfdff41fe67d814c5376ebfe11278cfd4 (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
/* dosfsck.h  -  Common data structures and global variables

   Copyright (C) 1993 Werner Almesberger <werner.almesberger@lrc.di.epfl.ch>
   Copyright (C) 1998 Roman Hodek <Roman.Hodek@informatik.uni-erlangen.de>

   This program is free software: you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation, either version 3 of the License, or
   (at your option) any later version.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program. If not, see <http://www.gnu.org/licenses/>.

   On Debian systems, the complete text of the GNU General Public License
   can be found in /usr/share/common-licenses/GPL-3 file.
*/

/* FAT32, VFAT, Atari format support, and various fixes additions May 1998
 * by Roman Hodek <Roman.Hodek@informatik.uni-erlangen.de> */

#ifndef _DOSFSCK_H
#define _DOSFSCK_H

#include <sys/types.h>
#define _LINUX_STAT_H		/* hack to avoid inclusion of <linux/stat.h> */
#define _LINUX_STRING_H_	/* hack to avoid inclusion of <linux/string.h> */
#define _LINUX_FS_H		/* hack to avoid inclusion of <linux/fs.h> */

#ifdef _USING_BIONIC_
#include <sys/endian.h>
#endif

#include <asm/types.h>
#include <asm/byteorder.h>

#include <linux/msdos_fs.h>

#undef CF_LE_W
#undef CF_LE_L
#undef CT_LE_W
#undef CT_LE_L

#if __BYTE_ORDER == __BIG_ENDIAN
#include <byteswap.h>
#define CF_LE_W(v) bswap_16(v)
#define CF_LE_L(v) bswap_32(v)
#define CT_LE_W(v) CF_LE_W(v)
#define CT_LE_L(v) CF_LE_L(v)
#else
#define CF_LE_W(v) (v)
#define CF_LE_L(v) (v)
#define CT_LE_W(v) (v)
#define CT_LE_L(v) (v)
#endif /* __BIG_ENDIAN */

#define VFAT_LN_ATTR (ATTR_RO | ATTR_HIDDEN | ATTR_SYS | ATTR_VOLUME)

/* ++roman: Use own definition of boot sector structure -- the kernel headers'
 * name for it is msdos_boot_sector in 2.0 and fat_boot_sector in 2.1 ... */
struct boot_sector {
    __u8 ignored[3];		/* Boot strap short or near jump */
    __u8 system_id[8];		/* Name - can be used to special case
				   partition manager volumes */
    __u8 sector_size[2];	/* bytes per logical sector */
    __u8 cluster_size;		/* sectors/cluster */
    __u16 reserved;		/* reserved sectors */
    __u8 fats;			/* number of FATs */
    __u8 dir_entries[2];	/* root directory entries */
    __u8 sectors[2];		/* number of sectors */
    __u8 media;			/* media code (unused) */
    __u16 fat_length;		/* sectors/FAT */
    __u16 secs_track;		/* sectors per track */
    __u16 heads;		/* number of heads */
    __u32 hidden;		/* hidden sectors (unused) */
    __u32 total_sect;		/* number of sectors (if sectors == 0) */

    /* The following fields are only used by FAT32 */
    __u32 fat32_length;		/* sectors/FAT */
    __u16 flags;		/* bit 8: fat mirroring, low 4: active fat */
    __u8 version[2];		/* major, minor filesystem version */
    __u32 root_cluster;		/* first cluster in root directory */
    __u16 info_sector;		/* filesystem info sector */
    __u16 backup_boot;		/* backup boot sector */
    __u8 reserved2[12];		/* Unused */

    __u8 drive_number;		/* Logical Drive Number */
    __u8 reserved3;		/* Unused */

    __u8 extended_sig;		/* Extended Signature (0x29) */
    __u32 serial;		/* Serial number */
    __u8 label[11];		/* FS label */
    __u8 fs_type[8];		/* FS Type */

    /* fill up to 512 bytes */
    __u8 junk[422];
} __attribute__ ((packed));

struct boot_sector_16 {
    __u8 ignored[3];		/* Boot strap short or near jump */
    __u8 system_id[8];		/* Name - can be used to special case
				   partition manager volumes */
    __u8 sector_size[2];	/* bytes per logical sector */
    __u8 cluster_size;		/* sectors/cluster */
    __u16 reserved;		/* reserved sectors */
    __u8 fats;			/* number of FATs */
    __u8 dir_entries[2];	/* root directory entries */
    __u8 sectors[2];		/* number of sectors */
    __u8 media;			/* media code (unused) */
    __u16 fat_length;		/* sectors/FAT */
    __u16 secs_track;		/* sectors per track */
    __u16 heads;		/* number of heads */
    __u32 hidden;		/* hidden sectors (unused) */
    __u32 total_sect;		/* number of sectors (if sectors == 0) */

    __u8 drive_number;		/* Logical Drive Number */
    __u8 reserved2;		/* Unused */

    __u8 extended_sig;		/* Extended Signature (0x29) */
    __u32 serial;		/* Serial number */
    __u8 label[11];		/* FS label */
    __u8 fs_type[8];		/* FS Type */

    /* fill up to 512 bytes */
    __u8 junk[450];
} __attribute__ ((packed));

struct info_sector {
    __u32 magic;		/* Magic for info sector ('RRaA') */
    __u8 junk[0x1dc];
    __u32 reserved1;		/* Nothing as far as I can tell */
    __u32 signature;		/* 0x61417272 ('rrAa') */
    __u32 free_clusters;	/* Free cluster count.  -1 if unknown */
    __u32 next_cluster;		/* Most recently allocated cluster. */
    __u32 reserved2[3];
    __u16 reserved3;
    __u16 boot_sign;
};

typedef struct {
    __u8 name[8], ext[3];	/* name and extension */
    __u8 attr;			/* attribute bits */
    __u8 lcase;			/* Case for base and extension */
    __u8 ctime_ms;		/* Creation time, milliseconds */
    __u16 ctime;		/* Creation time */
    __u16 cdate;		/* Creation date */
    __u16 adate;		/* Last access date */
    __u16 starthi;		/* High 16 bits of cluster in FAT32 */
    __u16 time, date, start;	/* time, date and first cluster */
    __u32 size;			/* file size (in bytes) */
} __attribute__ ((packed)) DIR_ENT;

typedef struct _dos_file {
    DIR_ENT dir_ent;
    char *lfn;
    loff_t offset;
    loff_t lfn_offset;
    struct _dos_file *parent;	/* parent directory */
    struct _dos_file *next;	/* next entry */
    struct _dos_file *first;	/* first entry (directory only) */
} DOS_FILE;

typedef struct {
    unsigned long value;
    unsigned long reserved;
} FAT_ENTRY;

typedef struct {
    int nfats;
    loff_t fat_start;
    unsigned int fat_size;	/* unit is bytes */
    unsigned int fat_bits;	/* size of a FAT entry */
    unsigned int eff_fat_bits;	/* # of used bits in a FAT entry */
    unsigned long root_cluster;	/* 0 for old-style root dir */
    loff_t root_start;
    unsigned int root_entries;
    loff_t data_start;
    unsigned int cluster_size;
    unsigned long clusters;
    loff_t fsinfo_start;	/* 0 if not present */
    long free_clusters;
    loff_t backupboot_start;	/* 0 if not present */
    unsigned char *fat;
    DOS_FILE **cluster_owner;
    char *label;
} DOS_FS;

#ifndef offsetof
#define offsetof(t,e)	((int)&(((t *)0)->e))
#endif

extern int interactive, rw, list, verbose, test, write_immed;
extern int atari_format;
extern unsigned n_files;
extern void *mem_queue;
extern unsigned retandroid;

/* value to use as end-of-file marker */
#define FAT_EOF(fs)	((atari_format ? 0xfff : 0xff8) | FAT_EXTD(fs))
#define FAT_IS_EOF(fs,v) ((unsigned long)(v) >= (0xff8|FAT_EXTD(fs)))
/* value to mark bad clusters */
#define FAT_BAD(fs)	(0xff7 | FAT_EXTD(fs))
/* range of values used for bad clusters */
#define FAT_MIN_BAD(fs)	((atari_format ? 0xff0 : 0xff7) | FAT_EXTD(fs))
#define FAT_MAX_BAD(fs)	((atari_format ? 0xff7 : 0xff7) | FAT_EXTD(fs))
#define FAT_IS_BAD(fs,v) ((v) >= FAT_MIN_BAD(fs) && (v) <= FAT_MAX_BAD(fs))

/* return -16 as a number with fs->fat_bits bits */
#define FAT_EXTD(fs)	(((1 << fs->eff_fat_bits)-1) & ~0xf)

/* marker for files with no 8.3 name */
#define FAT_NO_83NAME 32

#endif