1/****************************************************************************
2 ****************************************************************************
3 ***
4 ***   This header was automatically generated from a Linux kernel header
5 ***   of the same name, to make information necessary for userspace to
6 ***   call into the kernel available to libc.  It contains only constants,
7 ***   structures, and macros generated from the original header, and thus,
8 ***   contains no copyrightable information.
9 ***
10 ****************************************************************************
11 ****************************************************************************/
12#ifndef _LINUX_MSDOS_FS_H
13#define _LINUX_MSDOS_FS_H
14
15#include <linux/magic.h>
16
17#include <asm/byteorder.h>
18
19#define SECTOR_SIZE 512
20#define SECTOR_BITS 9
21#define MSDOS_DPB (MSDOS_DPS)
22#define MSDOS_DPB_BITS 4
23#define MSDOS_DPS (SECTOR_SIZE / sizeof(struct msdos_dir_entry))
24#define MSDOS_DPS_BITS 4
25#define CF_LE_W(v) le16_to_cpu(v)
26#define CF_LE_L(v) le32_to_cpu(v)
27#define CT_LE_W(v) cpu_to_le16(v)
28#define CT_LE_L(v) cpu_to_le32(v)
29
30#define MSDOS_ROOT_INO 1
31#define MSDOS_DIR_BITS 5
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#define ATTR_UNUSED (ATTR_VOLUME | ATTR_ARCH | ATTR_SYS | ATTR_HIDDEN)
45
46#define ATTR_EXT (ATTR_RO | ATTR_HIDDEN | ATTR_SYS | ATTR_VOLUME)
47
48#define CASE_LOWER_BASE 8
49#define CASE_LOWER_EXT 16
50
51#define DELETED_FLAG 0xe5
52#define IS_FREE(n) (!*(n) || *(n) == DELETED_FLAG)
53
54#define MSDOS_VALID_MODE (S_IFREG | S_IFDIR | S_IRWXU | S_IRWXG | S_IRWXO)
55
56#define MSDOS_MKMODE(a, m) (m & (a & ATTR_RO ? S_IRUGO|S_IXUGO : S_IRWXUGO))
57
58#define MSDOS_NAME 11
59#define MSDOS_LONGNAME 256
60#define MSDOS_SLOTS 21
61#define MSDOS_DOT ".          "
62#define MSDOS_DOTDOT "..         "
63
64#define FAT_VALID_MEDIA(x) ((0xF8 <= (x) && (x) <= 0xFF) || (x) == 0xF0)
65#define FAT_FIRST_ENT(s, x) ((MSDOS_SB(s)->fat_bits == 32 ? 0x0FFFFF00 :   MSDOS_SB(s)->fat_bits == 16 ? 0xFF00 : 0xF00) | (x))
66
67#define FAT_START_ENT 2
68
69#define MAX_FAT12 0xFF4
70#define MAX_FAT16 0xFFF4
71#define MAX_FAT32 0x0FFFFFF6
72#define MAX_FAT(s) (MSDOS_SB(s)->fat_bits == 32 ? MAX_FAT32 :   MSDOS_SB(s)->fat_bits == 16 ? MAX_FAT16 : MAX_FAT12)
73
74#define BAD_FAT12 0xFF7
75#define BAD_FAT16 0xFFF7
76#define BAD_FAT32 0x0FFFFFF7
77
78#define EOF_FAT12 0xFFF
79#define EOF_FAT16 0xFFFF
80#define EOF_FAT32 0x0FFFFFFF
81
82#define FAT_ENT_FREE (0)
83#define FAT_ENT_BAD (BAD_FAT32)
84#define FAT_ENT_EOF (EOF_FAT32)
85
86#define FAT_FSINFO_SIG1 0x41615252
87#define FAT_FSINFO_SIG2 0x61417272
88#define IS_FSINFO(x) (le32_to_cpu((x)->signature1) == FAT_FSINFO_SIG1   && le32_to_cpu((x)->signature2) == FAT_FSINFO_SIG2)
89
90#define VFAT_IOCTL_READDIR_BOTH _IOR('r', 1, struct dirent [2])
91#define VFAT_IOCTL_READDIR_SHORT _IOR('r', 2, struct dirent [2])
92
93#define FAT_IOCTL_GET_ATTRIBUTES _IOR('r', 0x10, __u32)
94#define FAT_IOCTL_SET_ATTRIBUTES _IOW('r', 0x11, __u32)
95#define VFAT_IOCTL_GET_VOLUME_ID _IOR('r', 0x12, __u32)
96
97#define VFAT_SFN_DISPLAY_LOWER 0x0001
98#define VFAT_SFN_DISPLAY_WIN95 0x0002
99#define VFAT_SFN_DISPLAY_WINNT 0x0004
100#define VFAT_SFN_CREATE_WIN95 0x0100
101#define VFAT_SFN_CREATE_WINNT 0x0200
102
103struct fat_boot_sector {
104 __u8 ignored[3];
105 __u8 system_id[8];
106 __u8 sector_size[2];
107 __u8 sec_per_clus;
108 __le16 reserved;
109 __u8 fats;
110 __u8 dir_entries[2];
111 __u8 sectors[2];
112 __u8 media;
113 __le16 fat_length;
114 __le16 secs_track;
115 __le16 heads;
116 __le32 hidden;
117 __le32 total_sect;
118
119 __le32 fat32_length;
120 __le16 flags;
121 __u8 version[2];
122 __le32 root_cluster;
123 __le16 info_sector;
124 __le16 backup_boot;
125 __le16 reserved2[6];
126};
127
128struct fat_boot_fsinfo {
129 __le32 signature1;
130 __le32 reserved1[120];
131 __le32 signature2;
132 __le32 free_clusters;
133 __le32 next_cluster;
134 __le32 reserved2[4];
135};
136
137struct fat_boot_bsx {
138 __u8 drive;
139 __u8 reserved1;
140 __u8 signature;
141 __u8 vol_id[4];
142 __u8 vol_label[11];
143 __u8 type[8];
144};
145#define FAT16_BSX_OFFSET 36
146#define FAT32_BSX_OFFSET 64
147
148struct msdos_dir_entry {
149 __u8 name[MSDOS_NAME];
150 __u8 attr;
151 __u8 lcase;
152 __u8 ctime_cs;
153 __le16 ctime;
154 __le16 cdate;
155 __le16 adate;
156 __le16 starthi;
157 __le16 time,date,start;
158 __le32 size;
159};
160
161struct msdos_dir_slot {
162 __u8 id;
163 __u8 name0_4[10];
164 __u8 attr;
165 __u8 reserved;
166 __u8 alias_checksum;
167 __u8 name5_10[12];
168 __le16 start;
169 __u8 name11_12[4];
170};
171
172struct fat_slot_info {
173 loff_t i_pos;
174 loff_t slot_off;
175 int nr_slots;
176 struct msdos_dir_entry *de;
177 struct buffer_head *bh;
178};
179
180#endif
181