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
|
/*
exfatfs.h (29.08.09)
Definitions of structures and constants used in exFAT file system.
Free exFAT implementation.
Copyright (C) 2010-2018 Andrew Nayenko
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 2 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, write to the Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#ifndef EXFATFS_H_INCLUDED
#define EXFATFS_H_INCLUDED
#include "byteorder.h"
#include "compiler.h"
typedef uint32_t cluster_t; /* cluster number */
#define EXFAT_FIRST_DATA_CLUSTER 2
#define EXFAT_LAST_DATA_CLUSTER 0xfffffff6
#define EXFAT_CLUSTER_FREE 0 /* free cluster */
#define EXFAT_CLUSTER_BAD 0xfffffff7 /* cluster contains bad sector */
#define EXFAT_CLUSTER_END 0xffffffff /* final cluster of file or directory */
#define EXFAT_STATE_MOUNTED 2
struct exfat_super_block
{
uint8_t jump[3]; /* 0x00 jmp and nop instructions */
uint8_t oem_name[8]; /* 0x03 "EXFAT " */
uint8_t __unused1[53]; /* 0x0B always 0 */
le64_t sector_start; /* 0x40 partition first sector */
le64_t sector_count; /* 0x48 partition sectors count */
le32_t fat_sector_start; /* 0x50 FAT first sector */
le32_t fat_sector_count; /* 0x54 FAT sectors count */
le32_t cluster_sector_start; /* 0x58 first cluster sector */
le32_t cluster_count; /* 0x5C total clusters count */
le32_t rootdir_cluster; /* 0x60 first cluster of the root dir */
le32_t volume_serial; /* 0x64 volume serial number */
struct /* 0x68 FS version */
{
uint8_t minor;
uint8_t major;
}
version;
le16_t volume_state; /* 0x6A volume state flags */
uint8_t sector_bits; /* 0x6C sector size as (1 << n) */
uint8_t spc_bits; /* 0x6D sectors per cluster as (1 << n) */
uint8_t fat_count; /* 0x6E always 1 */
uint8_t drive_no; /* 0x6F always 0x80 */
uint8_t allocated_percent; /* 0x70 percentage of allocated space */
uint8_t __unused2[397]; /* 0x71 always 0 */
le16_t boot_signature; /* the value of 0xAA55 */
}
PACKED;
STATIC_ASSERT(sizeof(struct exfat_super_block) == 512);
#define EXFAT_ENTRY_VALID 0x80
#define EXFAT_ENTRY_CONTINUED 0x40
#define EXFAT_ENTRY_OPTIONAL 0x20
#define EXFAT_ENTRY_BITMAP (0x01 | EXFAT_ENTRY_VALID)
#define EXFAT_ENTRY_UPCASE (0x02 | EXFAT_ENTRY_VALID)
#define EXFAT_ENTRY_LABEL (0x03 | EXFAT_ENTRY_VALID)
#define EXFAT_ENTRY_FILE (0x05 | EXFAT_ENTRY_VALID)
#define EXFAT_ENTRY_FILE_INFO (0x00 | EXFAT_ENTRY_VALID | EXFAT_ENTRY_CONTINUED)
#define EXFAT_ENTRY_FILE_NAME (0x01 | EXFAT_ENTRY_VALID | EXFAT_ENTRY_CONTINUED)
#define EXFAT_ENTRY_FILE_TAIL (0x00 | EXFAT_ENTRY_VALID \
| EXFAT_ENTRY_CONTINUED \
| EXFAT_ENTRY_OPTIONAL)
struct exfat_entry /* common container for all entries */
{
uint8_t type; /* any of EXFAT_ENTRY_xxx */
uint8_t data[31];
}
PACKED;
STATIC_ASSERT(sizeof(struct exfat_entry) == 32);
#define EXFAT_ENAME_MAX 15
struct exfat_entry_bitmap /* allocated clusters bitmap */
{
uint8_t type; /* EXFAT_ENTRY_BITMAP */
uint8_t __unknown1[19];
le32_t start_cluster;
le64_t size; /* in bytes */
}
PACKED;
STATIC_ASSERT(sizeof(struct exfat_entry_bitmap) == 32);
#define EXFAT_UPCASE_CHARS 0x10000
struct exfat_entry_upcase /* upper case translation table */
{
uint8_t type; /* EXFAT_ENTRY_UPCASE */
uint8_t __unknown1[3];
le32_t checksum;
uint8_t __unknown2[12];
le32_t start_cluster;
le64_t size; /* in bytes */
}
PACKED;
STATIC_ASSERT(sizeof(struct exfat_entry_upcase) == 32);
struct exfat_entry_label /* volume label */
{
uint8_t type; /* EXFAT_ENTRY_LABEL */
uint8_t length; /* number of characters */
le16_t name[EXFAT_ENAME_MAX]; /* in UTF-16LE */
}
PACKED;
STATIC_ASSERT(sizeof(struct exfat_entry_label) == 32);
#define EXFAT_ATTRIB_RO 0x01
#define EXFAT_ATTRIB_HIDDEN 0x02
#define EXFAT_ATTRIB_SYSTEM 0x04
#define EXFAT_ATTRIB_VOLUME 0x08
#define EXFAT_ATTRIB_DIR 0x10
#define EXFAT_ATTRIB_ARCH 0x20
struct exfat_entry_meta1 /* file or directory info (part 1) */
{
uint8_t type; /* EXFAT_ENTRY_FILE */
uint8_t continuations;
le16_t checksum;
le16_t attrib; /* combination of EXFAT_ATTRIB_xxx */
le16_t __unknown1;
le16_t crtime, crdate; /* creation date and time */
le16_t mtime, mdate; /* latest modification date and time */
le16_t atime, adate; /* latest access date and time */
uint8_t crtime_cs; /* creation time in cs (centiseconds) */
uint8_t mtime_cs; /* latest modification time in cs */
uint8_t __unknown2[10];
}
PACKED;
STATIC_ASSERT(sizeof(struct exfat_entry_meta1) == 32);
#define EXFAT_FLAG_ALWAYS1 (1u << 0)
#define EXFAT_FLAG_CONTIGUOUS (1u << 1)
struct exfat_entry_meta2 /* file or directory info (part 2) */
{
uint8_t type; /* EXFAT_ENTRY_FILE_INFO */
uint8_t flags; /* combination of EXFAT_FLAG_xxx */
uint8_t __unknown1;
uint8_t name_length;
le16_t name_hash;
le16_t __unknown2;
le64_t valid_size; /* in bytes, less or equal to size */
uint8_t __unknown3[4];
le32_t start_cluster;
le64_t size; /* in bytes */
}
PACKED;
STATIC_ASSERT(sizeof(struct exfat_entry_meta2) == 32);
struct exfat_entry_name /* file or directory name */
{
uint8_t type; /* EXFAT_ENTRY_FILE_NAME */
uint8_t __unknown;
le16_t name[EXFAT_ENAME_MAX]; /* in UTF-16LE */
}
PACKED;
STATIC_ASSERT(sizeof(struct exfat_entry_name) == 32);
#endif /* ifndef EXFATFS_H_INCLUDED */
|