1 #ifndef _LINUX_MSDOS_FS_H
2 #define _LINUX_MSDOS_FS_H
3
4
5
6
7 #include <linux/fs.h>
8 #include <linux/stat.h>
9 #include <linux/fd.h>
10
11 #define MSDOS_ROOT_INO 1
12 #define SECTOR_SIZE 512
13 #define SECTOR_BITS 9
14 #define MSDOS_DPB (MSDOS_DPS)
15 #define MSDOS_DPB_BITS 4
16 #define MSDOS_DPS (SECTOR_SIZE/sizeof(struct msdos_dir_entry))
17 #define MSDOS_DPS_BITS 4
18 #define MSDOS_DIR_BITS 5
19
20 #define MSDOS_SUPER_MAGIC 0x4d44
21
22 #define FAT_CACHE 8
23
24 #define MSDOS_MAX_EXTRA 3
25
26
27 #define ATTR_RO 1
28 #define ATTR_HIDDEN 2
29 #define ATTR_SYS 4
30 #define ATTR_VOLUME 8
31 #define ATTR_DIR 16
32 #define ATTR_ARCH 32
33
34 #define ATTR_NONE 0
35 #define ATTR_UNUSED (ATTR_VOLUME | ATTR_ARCH | ATTR_SYS | ATTR_HIDDEN)
36
37 #define ATTR_EXT (ATTR_RO | ATTR_HIDDEN | ATTR_SYS | ATTR_VOLUME)
38
39
40 #define CASE_LOWER_BASE 8
41 #define CASE_LOWER_EXT 16
42
43 #define SCAN_ANY 0
44 #define SCAN_HID 1
45 #define SCAN_NOTHID 2
46 #define SCAN_NOTANY 3
47
48 #define DELETED_FLAG 0xe5
49 #define IS_FREE(n) (!*(n) || *(const unsigned char *) (n) == DELETED_FLAG || \
50 *(const unsigned char *) (n) == FD_FILL_BYTE)
51
52 #define MSDOS_VALID_MODE (S_IFREG | S_IFDIR | S_IRWXU | S_IRWXG | S_IRWXO)
53
54
55 #define MSDOS_SB(s) (&((s)->u.msdos_sb))
56 #define MSDOS_I(i) (&((i)->u.msdos_i))
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 MSDOS_FAT12 4078
65
66
67
68
69
70
71
72
73 #define CF_LE_W(v) (v)
74 #define CF_LE_L(v) (v)
75 #define CT_LE_W(v) (v)
76 #define CT_LE_L(v) (v)
77
78
79 struct msdos_boot_sector {
80 __s8 ignored[3];
81 __s8 system_id[8];
82
83 __u8 sector_size[2];
84 __u8 cluster_size;
85 __u16 reserved;
86 __u8 fats;
87 __u8 dir_entries[2];
88 __u8 sectors[2];
89 __u8 media;
90 __u16 fat_length;
91 __u16 secs_track;
92 __u16 heads;
93 __u32 hidden;
94 __u32 total_sect;
95 };
96
97 struct msdos_dir_entry {
98 __s8 name[8],ext[3];
99 __u8 attr;
100 __u8 lcase;
101 __u8 ctime_ms;
102 __u16 ctime;
103 __u16 cdate;
104 __u16 adate;
105 __u8 unused[2];
106 __u16 time,date,start;
107 __u32 size;
108 };
109
110
111 struct msdos_dir_slot {
112 __u8 id;
113 __u8 name0_4[10];
114 __u8 attr;
115 __u8 reserved;
116 __u8 alias_checksum;
117 __u8 name5_10[12];
118 __u8 start[2];
119 __u8 name11_12[4];
120 };
121
122 struct slot_info {
123 int is_long;
124 int long_slots;
125 int total_slots;
126 loff_t longname_offset;
127 loff_t shortname_offset;
128 int ino;
129 };
130
131 struct fat_cache {
132 kdev_t device;
133 int ino;
134 int file_cluster;
135 int disk_cluster;
136 struct fat_cache *next;
137 };
138
139
140 #define MSDOS_CAN_BMAP(mib) (!(((mib)->cluster_size & 1) || \
141 ((mib)->data_start & 1)))
142
143
144 #define MSDOS_MKMODE(a,m) (m & (a & ATTR_RO ? S_IRUGO|S_IXUGO : S_IRWXUGO))
145
146
147 #define MSDOS_MKATTR(m) ((m & S_IWUGO) ? ATTR_NONE : ATTR_RO)
148
149
150 #ifdef __KERNEL__
151
152
153 extern int is_binary(char conversion,char *extension);
154 extern void lock_fat(struct super_block *sb);
155 extern void unlock_fat(struct super_block *sb);
156 extern int fat_add_cluster(struct inode *inode);
157 extern int date_dos2unix(__u16 time, __u16 date);
158 extern void fat_fs_panic(struct super_block *s,const char *msg);
159 extern void fat_lock_creation(void);
160 extern void fat_unlock_creation(void);
161 extern void fat_date_unix2dos(int unix_date,__u16 *time, __u16 *date);
162 extern int fat_get_entry(struct inode *dir,loff_t *pos,struct buffer_head **bh,
163 struct msdos_dir_entry **de);
164 extern int fat_scan(struct inode *dir,const char *name,struct buffer_head **res_bh,
165 struct msdos_dir_entry **res_de,int *ino,char scantype);
166 extern int fat_parent_ino(struct inode *dir,int locked);
167 extern int fat_subdirs(struct inode *dir);
168
169
170 extern int fat_access(struct super_block *sb,int nr,int new_value);
171 extern int fat_smap(struct inode *inode,int sector);
172 extern int fat_free(struct inode *inode,int skip);
173 void fat_cache_inval_inode(struct inode *inode);
174 void fat_cache_inval_dev(kdev_t device);
175 extern void cache_init(void);
176 void cache_lookup(struct inode *inode,int cluster,int *f_clu,int *d_clu);
177 void cache_add(struct inode *inode,int f_clu,int d_clu);
178 int get_cluster(struct inode *inode,int cluster);
179
180
181 extern int fat_bmap(struct inode *inode,int block);
182 extern int fat_notify_change(struct inode *,struct iattr *);
183 extern void fat_put_inode(struct inode *inode);
184 extern void fat_put_super(struct super_block *sb);
185 extern void fat_read_inode(struct inode *inode, struct inode_operations *dir_ops);
186 extern struct super_block *fat_read_super(struct super_block *s, void *data, int silent);
187 extern void fat_statfs(struct super_block *sb,struct statfs *buf, int);
188 extern void fat_write_inode(struct inode *inode);
189
190
191 extern struct file_operations fat_dir_operations;
192 extern int fat_readdir(struct inode *inode, struct file *filp,
193 void *dirent, filldir_t);
194 extern int fat_dir_ioctl(struct inode * inode, struct file * filp,
195 unsigned int cmd, unsigned long arg);
196
197
198 extern struct inode_operations fat_file_inode_operations;
199 extern struct inode_operations fat_file_inode_operations_1024;
200 extern int fat_file_read(struct inode *, struct file *, char *, int);
201 extern int fat_file_write(struct inode *, struct file *, const char *, int);
202 extern void fat_truncate(struct inode *inode);
203
204
205 extern int fat_mmap(struct inode *, struct file *, struct vm_area_struct *);
206
207
208
209 extern int init_vfat_fs(void);
210
211
212
213 extern int init_msdos_fs(void);
214 extern struct file_system_type msdos_fs_type;
215
216
217 extern struct super_block *msdos_read_super(struct super_block *sb,void *data, int silent);
218
219
220 extern void msdos_read_inode(struct inode *inode);
221 extern int msdos_lookup(struct inode *dir,const char *name,int len,
222 struct inode **result);
223 extern int msdos_create(struct inode *dir,const char *name,int len,int mode,
224 struct inode **result);
225 extern int msdos_rmdir(struct inode *dir,const char *name,int len);
226 extern int msdos_mkdir(struct inode *dir,const char *name,int len,int mode);
227 extern int msdos_unlink(struct inode *dir,const char *name,int len);
228 extern int msdos_unlink_umsdos(struct inode *dir,const char *name,int len);
229 extern int msdos_rename(struct inode *old_dir,const char *old_name,int old_len,
230 struct inode *new_dir,const char *new_name,int new_len);
231
232
233 extern int init_fat_fs(void);
234
235 #endif
236
237 #endif