1
2 #ifndef _UAPI_LINUX_MSDOS_FS_H
3 #define _UAPI_LINUX_MSDOS_FS_H
4
5 #include <linux/types.h>
6 #include <linux/magic.h>
7 #include <asm/byteorder.h>
8
9
10
11
12
13 #ifndef SECTOR_SIZE
14 #define SECTOR_SIZE 512
15 #endif
16 #define SECTOR_BITS 9
17 #define MSDOS_DPB (MSDOS_DPS)
18 #define MSDOS_DPB_BITS 4
19 #define MSDOS_DPS (SECTOR_SIZE / sizeof(struct msdos_dir_entry))
20 #define MSDOS_DPS_BITS 4
21 #define MSDOS_LONGNAME 256
22 #define CF_LE_W(v) le16_to_cpu(v)
23 #define CF_LE_L(v) le32_to_cpu(v)
24 #define CT_LE_W(v) cpu_to_le16(v)
25 #define CT_LE_L(v) cpu_to_le32(v)
26
27 #define MSDOS_ROOT_INO 1
28 #define MSDOS_FSINFO_INO 2
29
30 #define MSDOS_DIR_BITS 5
31
32
33 #define FAT_MAX_DIR_ENTRIES (65536)
34 #define FAT_MAX_DIR_SIZE (FAT_MAX_DIR_ENTRIES << MSDOS_DIR_BITS)
35
36 #define ATTR_NONE 0
37 #define ATTR_RO 1
38 #define ATTR_HIDDEN 2
39 #define ATTR_SYS 4
40 #define ATTR_VOLUME 8
41 #define ATTR_DIR 16
42 #define ATTR_ARCH 32
43
44
45 #define ATTR_UNUSED (ATTR_VOLUME | ATTR_ARCH | ATTR_SYS | ATTR_HIDDEN)
46
47 #define ATTR_EXT (ATTR_RO | ATTR_HIDDEN | ATTR_SYS | ATTR_VOLUME)
48
49 #define CASE_LOWER_BASE 8
50 #define CASE_LOWER_EXT 16
51
52 #define DELETED_FLAG 0xe5
53 #define IS_FREE(n) (!*(n) || *(n) == DELETED_FLAG)
54
55 #define FAT_LFN_LEN 255
56 #define MSDOS_NAME 11
57 #define MSDOS_SLOTS 21
58 #define MSDOS_DOT ". "
59 #define MSDOS_DOTDOT ".. "
60
61
62 #define FAT_START_ENT 2
63
64
65 #define MAX_FAT12 0xFF4
66 #define MAX_FAT16 0xFFF4
67 #define MAX_FAT32 0x0FFFFFF6
68
69
70 #define BAD_FAT12 0xFF7
71 #define BAD_FAT16 0xFFF7
72 #define BAD_FAT32 0x0FFFFFF7
73
74
75 #define EOF_FAT12 0xFFF
76 #define EOF_FAT16 0xFFFF
77 #define EOF_FAT32 0x0FFFFFFF
78
79 #define FAT_ENT_FREE (0)
80 #define FAT_ENT_BAD (BAD_FAT32)
81 #define FAT_ENT_EOF (EOF_FAT32)
82
83 #define FAT_FSINFO_SIG1 0x41615252
84 #define FAT_FSINFO_SIG2 0x61417272
85 #define IS_FSINFO(x) (le32_to_cpu((x)->signature1) == FAT_FSINFO_SIG1 \
86 && le32_to_cpu((x)->signature2) == FAT_FSINFO_SIG2)
87
88 #define FAT_STATE_DIRTY 0x01
89
90 struct __fat_dirent {
91 long d_ino;
92 __kernel_off_t d_off;
93 unsigned short d_reclen;
94 char d_name[256];
95 };
96
97
98
99
100 #define VFAT_IOCTL_READDIR_BOTH _IOR('r', 1, struct __fat_dirent[2])
101 #define VFAT_IOCTL_READDIR_SHORT _IOR('r', 2, struct __fat_dirent[2])
102
103 #define FAT_IOCTL_GET_ATTRIBUTES _IOR('r', 0x10, __u32)
104 #define FAT_IOCTL_SET_ATTRIBUTES _IOW('r', 0x11, __u32)
105
106 #define FAT_IOCTL_GET_VOLUME_ID _IOR('r', 0x13, __u32)
107
108 struct fat_boot_sector {
109 __u8 ignored[3];
110 __u8 system_id[8];
111
112 __u8 sector_size[2];
113 __u8 sec_per_clus;
114 __le16 reserved;
115 __u8 fats;
116 __u8 dir_entries[2];
117 __u8 sectors[2];
118 __u8 media;
119 __le16 fat_length;
120 __le16 secs_track;
121 __le16 heads;
122 __le32 hidden;
123 __le32 total_sect;
124
125 union {
126 struct {
127
128 __u8 drive_number;
129 __u8 state;
130
131 __u8 signature;
132 __u8 vol_id[4];
133 __u8 vol_label[MSDOS_NAME];
134 __u8 fs_type[8];
135
136 } fat16;
137
138 struct {
139
140 __le32 length;
141 __le16 flags;
142
143 __u8 version[2];
144
145 __le32 root_cluster;
146
147 __le16 info_sector;
148 __le16 backup_boot;
149 __le16 reserved2[6];
150
151 __u8 drive_number;
152 __u8 state;
153
154 __u8 signature;
155 __u8 vol_id[4];
156 __u8 vol_label[MSDOS_NAME];
157 __u8 fs_type[8];
158
159 } fat32;
160 };
161 };
162
163 struct fat_boot_fsinfo {
164 __le32 signature1;
165 __le32 reserved1[120];
166 __le32 signature2;
167 __le32 free_clusters;
168 __le32 next_cluster;
169 __le32 reserved2[4];
170 };
171
172 struct msdos_dir_entry {
173 __u8 name[MSDOS_NAME];
174 __u8 attr;
175 __u8 lcase;
176 __u8 ctime_cs;
177 __le16 ctime;
178 __le16 cdate;
179 __le16 adate;
180 __le16 starthi;
181 __le16 time,date,start;
182 __le32 size;
183 };
184
185
186 struct msdos_dir_slot {
187 __u8 id;
188 __u8 name0_4[10];
189 __u8 attr;
190 __u8 reserved;
191 __u8 alias_checksum;
192 __u8 name5_10[12];
193 __le16 start;
194 __u8 name11_12[4];
195 };
196
197 #endif