1 #ifndef _LINUX_FS_H
2 #define _LINUX_FS_H
3
4
5
6
7
8
9 #include <linux/limits.h>
10 #include <linux/wait.h>
11 #include <linux/types.h>
12 #include <linux/dirent.h>
13 #include <linux/vfs.h>
14
15
16
17
18
19
20
21
22
23 #undef NR_OPEN
24 #define NR_OPEN 256
25
26 #define NR_INODE 256
27 #define NR_FILE 128
28 #define NR_SUPER 16
29 #define NR_HASH 997
30 #define NR_FILE_LOCKS 32
31 #define BLOCK_SIZE 1024
32 #define BLOCK_SIZE_BITS 10
33 #define MAX_CHRDEV 32
34 #define MAX_BLKDEV 32
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57 #define UNNAMED_MAJOR 0
58
59 #define MAY_EXEC 1
60 #define MAY_WRITE 2
61 #define MAY_READ 4
62
63 #define READ 0
64 #define WRITE 1
65 #define READA 2
66 #define WRITEA 3
67
68 extern void buffer_init(void);
69 extern unsigned long inode_init(unsigned long start, unsigned long end);
70
71 #define MAJOR(a) (((unsigned)(a))>>8)
72 #define MINOR(a) ((a)&0xff)
73
74 #ifndef NULL
75 #define NULL ((void *) 0)
76 #endif
77
78 #define NIL_FILP ((struct file *)0)
79 #define SEL_IN 1
80 #define SEL_OUT 2
81 #define SEL_EX 4
82
83
84
85
86 #define MS_RDONLY 1
87 #define MS_NOSUID 2
88 #define MS_NODEV 4
89 #define MS_NOEXEC 8
90 #define MS_SYNC 16
91 #define MS_REMOUNT 32
92
93
94
95
96 #define MS_RMT_MASK (MS_RDONLY)
97
98
99
100
101 #define MS_MGC_VAL 0xC0ED0000
102 #define MS_MGC_MSK 0xffff0000
103
104
105
106
107
108
109
110
111
112 #define IS_RDONLY(inode) ((inode)->i_sb->s_flags & MS_RDONLY)
113 #define IS_NOSUID(inode) ((inode)->i_flags & MS_NOSUID)
114 #define IS_NODEV(inode) ((inode)->i_flags & MS_NODEV)
115 #define IS_NOEXEC(inode) ((inode)->i_flags & MS_NOEXEC)
116 #define IS_SYNC(inode) ((inode)->i_flags & MS_SYNC)
117
118
119
120
121 #define BLKROSET 4701
122 #define BLKROGET 4702
123 #define BLKRRPART 4703
124 #define BLKGETSIZE 4704
125
126 #define BMAP_IOCTL 1
127 #define FIBMAP 1
128 #define FIGETBSZ 2
129
130 typedef char buffer_block[BLOCK_SIZE];
131
132 struct buffer_head {
133 char * b_data;
134 unsigned long b_size;
135 unsigned long b_blocknr;
136 dev_t b_dev;
137 unsigned short b_count;
138 unsigned char b_uptodate;
139 unsigned char b_dirt;
140 unsigned char b_lock;
141 struct wait_queue * b_wait;
142 struct buffer_head * b_prev;
143 struct buffer_head * b_next;
144 struct buffer_head * b_prev_free;
145 struct buffer_head * b_next_free;
146 struct buffer_head * b_this_page;
147 struct buffer_head * b_reqnext;
148 };
149
150 #include <linux/pipe_fs_i.h>
151 #include <linux/minix_fs_i.h>
152 #include <linux/ext_fs_i.h>
153 #include <linux/msdos_fs_i.h>
154 #include <linux/iso_fs_i.h>
155 #include <linux/nfs_fs_i.h>
156
157 struct inode {
158 dev_t i_dev;
159 unsigned long i_ino;
160 umode_t i_mode;
161 nlink_t i_nlink;
162 uid_t i_uid;
163 gid_t i_gid;
164 dev_t i_rdev;
165 off_t i_size;
166 time_t i_atime;
167 time_t i_mtime;
168 time_t i_ctime;
169 unsigned long i_blksize;
170 unsigned long i_blocks;
171 struct inode_operations * i_op;
172 struct super_block * i_sb;
173 struct wait_queue * i_wait;
174 struct file_lock * i_flock;
175 struct vm_area_struct * i_mmap;
176 struct inode * i_next, * i_prev;
177 struct inode * i_hash_next, * i_hash_prev;
178 struct inode * i_bound_to, * i_bound_by;
179 unsigned short i_count;
180 unsigned short i_flags;
181 unsigned char i_lock;
182 unsigned char i_dirt;
183 unsigned char i_pipe;
184 unsigned char i_mount;
185 unsigned char i_seek;
186 unsigned char i_update;
187 union {
188 struct pipe_inode_info pipe_i;
189 struct minix_inode_info minix_i;
190 struct ext_inode_info ext_i;
191 struct msdos_inode_info msdos_i;
192 struct iso_inode_info isofs_i;
193 struct nfs_inode_info nfs_i;
194 } u;
195 };
196
197 struct file {
198 mode_t f_mode;
199 dev_t f_rdev;
200 off_t f_pos;
201 unsigned short f_flags;
202 unsigned short f_count;
203 unsigned short f_reada;
204 struct inode * f_inode;
205 struct file_operations * f_op;
206 };
207
208 struct file_lock {
209 struct file_lock *fl_next;
210 struct task_struct *fl_owner;
211 struct wait_queue *fl_wait;
212 char fl_type;
213 char fl_whence;
214 off_t fl_start;
215 off_t fl_end;
216 };
217
218 #include <linux/minix_fs_sb.h>
219 #include <linux/ext_fs_sb.h>
220 #include <linux/msdos_fs_sb.h>
221 #include <linux/iso_fs_sb.h>
222 #include <linux/nfs_fs_sb.h>
223
224 struct super_block {
225 dev_t s_dev;
226 unsigned long s_blocksize;
227 unsigned char s_lock;
228 unsigned char s_rd_only;
229 unsigned char s_dirt;
230 struct super_operations *s_op;
231 unsigned long s_flags;
232 unsigned long s_magic;
233 unsigned long s_time;
234 struct inode * s_covered;
235 struct inode * s_mounted;
236 struct wait_queue * s_wait;
237 union {
238 struct minix_sb_info minix_sb;
239 struct ext_sb_info ext_sb;
240 struct msdos_sb_info msdos_sb;
241 struct isofs_sb_info isofs_sb;
242 struct nfs_sb_info nfs_sb;
243 } u;
244 };
245
246 struct file_operations {
247 int (*lseek) (struct inode *, struct file *, off_t, int);
248 int (*read) (struct inode *, struct file *, char *, int);
249 int (*write) (struct inode *, struct file *, char *, int);
250 int (*readdir) (struct inode *, struct file *, struct dirent *, int);
251 int (*select) (struct inode *, struct file *, int, select_table *);
252 int (*ioctl) (struct inode *, struct file *, unsigned int, unsigned int);
253 int (*mmap) (void);
254 int (*open) (struct inode *, struct file *);
255 void (*release) (struct inode *, struct file *);
256 };
257
258 struct inode_operations {
259 struct file_operations * default_file_ops;
260 int (*create) (struct inode *,const char *,int,int,struct inode **);
261 int (*lookup) (struct inode *,const char *,int,struct inode **);
262 int (*link) (struct inode *,struct inode *,const char *,int);
263 int (*unlink) (struct inode *,const char *,int);
264 int (*symlink) (struct inode *,const char *,int,const char *);
265 int (*mkdir) (struct inode *,const char *,int,int);
266 int (*rmdir) (struct inode *,const char *,int);
267 int (*mknod) (struct inode *,const char *,int,int,int);
268 int (*rename) (struct inode *,const char *,int,struct inode *,const char *,int);
269 int (*readlink) (struct inode *,char *,int);
270 int (*follow_link) (struct inode *,struct inode *,int,int,struct inode **);
271 int (*bmap) (struct inode *,int);
272 void (*truncate) (struct inode *);
273 int (*permission) (struct inode *, int);
274 };
275
276 struct super_operations {
277 void (*read_inode) (struct inode *);
278 int (*notify_change) (struct inode *);
279 void (*write_inode) (struct inode *);
280 void (*put_inode) (struct inode *);
281 void (*put_super) (struct super_block *);
282 void (*write_super) (struct super_block *);
283 void (*statfs) (struct super_block *, struct statfs *);
284 };
285
286 struct file_system_type {
287 struct super_block *(*read_super) (struct super_block *, void *);
288 char *name;
289 int requires_dev;
290 };
291
292 extern struct file_operations * chrdev_fops[MAX_CHRDEV];
293 extern struct file_operations * blkdev_fops[MAX_BLKDEV];
294
295 extern struct file_system_type *get_fs_type(char *name);
296
297 extern int fs_may_mount(dev_t dev);
298 extern int fs_may_umount(dev_t dev, struct inode * mount_root);
299
300 extern struct file file_table[NR_FILE];
301 extern struct super_block super_block[NR_SUPER];
302
303 extern void grow_buffers(int size);
304 extern int shrink_buffers(unsigned int priority);
305
306 extern int nr_buffers;
307 extern int buffermem;
308 extern int nr_buffer_heads;
309
310 extern void check_disk_change(dev_t dev);
311 extern void invalidate_inodes(dev_t dev);
312 extern void invalidate_buffers(dev_t dev);
313 extern int floppy_change(struct buffer_head * first_block);
314 extern int ticks_to_floppy_on(unsigned int dev);
315 extern void floppy_on(unsigned int dev);
316 extern void floppy_off(unsigned int dev);
317 extern void sync_inodes(dev_t dev);
318 extern void sync_dev(dev_t dev);
319 extern void sync_supers(dev_t dev);
320 extern int bmap(struct inode * inode,int block);
321 extern int notify_change(struct inode * inode);
322 extern int namei(const char * pathname, struct inode ** res_inode);
323 extern int lnamei(const char * pathname, struct inode ** res_inode);
324 extern int permission(struct inode * inode,int mask);
325 extern int open_namei(const char * pathname, int flag, int mode,
326 struct inode ** res_inode, struct inode * base);
327 extern int do_mknod(const char * filename, int mode, dev_t dev);
328 extern void iput(struct inode * inode);
329 extern struct inode * iget(struct super_block * sb,int nr);
330 extern struct inode * get_empty_inode(void);
331 extern void clear_inode(struct inode *);
332 extern struct inode * get_pipe_inode(void);
333 extern struct file * get_empty_filp(void);
334 extern struct buffer_head * get_hash_table(dev_t dev, int block, int size);
335 extern struct buffer_head * getblk(dev_t dev, int block, int size);
336 extern void ll_rw_block(int rw, int nr, struct buffer_head * bh[]);
337 extern void ll_rw_page(int rw, int dev, int nr, char * buffer);
338 extern void ll_rw_swap_file(int rw, int dev, unsigned int *b, int nb, char *buffer);
339 extern void brelse(struct buffer_head * buf);
340 extern struct buffer_head * bread(dev_t dev, int block, int size);
341 extern void bread_page(unsigned long addr,dev_t dev,int b[4]);
342 extern struct buffer_head * breada(dev_t dev,int block,...);
343 extern void put_super(dev_t dev);
344 extern dev_t ROOT_DEV;
345
346 extern void mount_root(void);
347
348 extern int char_read(struct inode *, struct file *, char *, int);
349 extern int block_read(struct inode *, struct file *, char *, int);
350 extern int read_ahead[];
351
352 extern int char_write(struct inode *, struct file *, char *, int);
353 extern int block_write(struct inode *, struct file *, char *, int);
354
355 #endif