This source file includes following definitions.
- msdos_sread
1 #ifndef _LINUX_MSDOS_FS_H
2 #define _LINUX_MSDOS_FS_H
3
4
5
6
7
8 #include <linux/fs.h>
9
10 #define MSDOS_ROOT_INO 1
11 #define SECTOR_SIZE 512
12 #define SECTOR_BITS 9
13 #define MSDOS_DPB (MSDOS_DPS*2)
14 #define MSDOS_DPB_BITS 5
15 #define MSDOS_DPS (SECTOR_SIZE/sizeof(struct msdos_dir_entry))
16 #define MSDOS_DPS_BITS 4
17 #define MSDOS_DIR_BITS 5
18
19 #define MSDOS_SUPER_MAGIC 0x4d44
20
21 #define FAT_CACHE 8
22
23 #define ATTR_RO 1
24 #define ATTR_HIDDEN 2
25 #define ATTR_SYS 4
26 #define ATTR_VOLUME 8
27 #define ATTR_DIR 16
28 #define ATTR_ARCH 32
29
30 #define ATTR_NONE 0
31 #define ATTR_UNUSED (ATTR_VOLUME | ATTR_ARCH | ATTR_SYS | ATTR_HIDDEN)
32
33
34 #define DELETED_FLAG 0xe5
35
36 #define MSDOS_SB(s) (&((s)->u.msdos_sb))
37 #define MSDOS_I(i) (&((i)->u.msdos_i))
38
39 #define MSDOS_NAME 11
40 #define MSDOS_DOT ". "
41 #define MSDOS_DOTDOT ".. "
42
43 #define MSDOS_FAT12 4086
44
45 struct msdos_boot_sector {
46 char ignored[13];
47 unsigned char cluster_size;
48 unsigned short reserved;
49 unsigned char fats;
50 unsigned char dir_entries[2];
51 unsigned char sectors[2];
52 unsigned char media;
53 unsigned short fat_length;
54 unsigned short secs_track;
55 unsigned short heads;
56 unsigned long hidden;
57 unsigned long total_sect;
58 };
59
60 struct msdos_dir_entry {
61 char name[8],ext[3];
62 unsigned char attr;
63 char unused[10];
64 unsigned short time,date,start;
65 unsigned long size;
66 };
67
68 struct fat_cache {
69 int device;
70 int ino;
71 int file_cluster;
72 int disk_cluster;
73 struct fat_cache *next;
74 };
75
76
77
78 #define MSDOS_CAN_BMAP(mib) (!(((mib)->cluster_size & 1) || \
79 ((mib)->data_start & 1)))
80
81
82
83 #define MSDOS_MKMODE(a,m) (m & (a & ATTR_RO ? 0444 : 0777))
84
85
86
87 #define MSDOS_MKATTR(m) (!(m & 0200) ? ATTR_RO : ATTR_NONE)
88
89
90 static inline struct buffer_head *msdos_sread(int dev,int sector,void **start)
91 {
92 struct buffer_head *bh;
93
94 if (!(bh = bread(dev,sector >> 1, 1024)))
95 return NULL;
96 *start = bh->b_data+((sector & 1) << SECTOR_BITS);
97 return bh;
98 }
99
100
101
102
103 extern int is_binary(char conversion,char *extension);
104 extern void lock_creation(void);
105 extern void unlock_creation(void);
106 extern void lock_fat(struct super_block *sb);
107 extern void unlock_fat(struct super_block *sb);
108 extern int msdos_add_cluster(struct inode *inode);
109 extern int date_dos2unix(unsigned short time,unsigned short date);
110 extern void date_unix2dos(int unix_date,unsigned short *time,
111 unsigned short *date);
112 extern int msdos_get_entry(struct inode *dir,int *pos,struct buffer_head **bh,
113 struct msdos_dir_entry **de);
114 extern int msdos_scan(struct inode *dir,char *name,struct buffer_head **res_bh,
115 struct msdos_dir_entry **res_de,int *ino);
116 extern int msdos_parent_ino(struct inode *dir,int locked);
117 extern int msdos_subdirs(struct inode *dir);
118
119
120
121 extern int fat_access(struct super_block *sb,int this,int new_value);
122 extern int msdos_smap(struct inode *inode,int sector);
123 extern int fat_free(struct inode *inode,int skip);
124 extern void cache_init(void);
125 void cache_lookup(struct inode *inode,int cluster,int *f_clu,int *d_clu);
126 void cache_add(struct inode *inode,int f_clu,int d_clu);
127 void cache_inval_inode(struct inode *inode);
128 void cache_inval_dev(int device);
129 int get_cluster(struct inode *inode,int cluster);
130
131
132
133 extern int msdos_lookup(struct inode *dir,const char *name,int len,
134 struct inode **result);
135 extern int msdos_create(struct inode *dir,const char *name,int len,int mode,
136 struct inode **result);
137 extern int msdos_mkdir(struct inode *dir,const char *name,int len,int mode);
138 extern int msdos_rmdir(struct inode *dir,const char *name,int len);
139 extern int msdos_unlink(struct inode *dir,const char *name,int len);
140 extern int msdos_rename(struct inode *old_dir,const char *old_name,int old_len,
141 struct inode *new_dir,const char *new_name,int new_len);
142
143
144
145 extern void msdos_put_inode(struct inode *inode);
146 extern void msdos_put_super(struct super_block *sb);
147 extern struct super_block *msdos_read_super(struct super_block *s,void *data);
148 extern void msdos_statfs(struct super_block *sb,struct statfs *buf);
149 extern int msdos_bmap(struct inode *inode,int block);
150 extern void msdos_read_inode(struct inode *inode);
151 extern void msdos_write_inode(struct inode *inode);
152
153
154
155 extern struct file_operations msdos_dir_operations;
156 extern struct inode_operations msdos_dir_inode_operations;
157
158
159
160 extern struct file_operations msdos_file_operations;
161 extern struct inode_operations msdos_file_inode_operations;
162 extern struct inode_operations msdos_file_inode_operations_no_bmap;
163
164 extern void msdos_truncate(struct inode *inode);
165
166 #endif