This source file includes following definitions.
- mark_buffer_clean
- mark_buffer_dirty
- iget
1 #ifndef _LINUX_FS_H
2 #define _LINUX_FS_H
3
4
5
6
7
8
9 #include <linux/linkage.h>
10 #include <linux/limits.h>
11 #include <linux/wait.h>
12 #include <linux/types.h>
13 #include <linux/dirent.h>
14 #include <linux/vfs.h>
15 #include <linux/net.h>
16
17
18
19
20
21
22
23
24
25 #undef NR_OPEN
26 #define NR_OPEN 256
27
28 #define NR_INODE 2048
29 #define NR_FILE 1024
30 #define NR_SUPER 32
31 #define NR_IHASH 131
32 #define NR_FILE_LOCKS 64
33 #define BLOCK_SIZE 1024
34 #define BLOCK_SIZE_BITS 10
35
36 #define MAY_EXEC 1
37 #define MAY_WRITE 2
38 #define MAY_READ 4
39
40 #define READ 0
41 #define WRITE 1
42 #define READA 2
43 #define WRITEA 3
44
45 extern void buffer_init(void);
46 extern unsigned long inode_init(unsigned long start, unsigned long end);
47 extern unsigned long file_table_init(unsigned long start, unsigned long end);
48 extern unsigned long name_cache_init(unsigned long start, unsigned long end);
49
50 #define MAJOR(a) (int)((unsigned short)(a) >> 8)
51 #define MINOR(a) (int)((unsigned short)(a) & 0xFF)
52 #define MKDEV(a,b) ((int)((((a) & 0xff) << 8) | ((b) & 0xff)))
53 #define NODEV MKDEV(0,0)
54
55 #ifndef NULL
56 #define NULL ((void *) 0)
57 #endif
58
59 #define NIL_FILP ((struct file *)0)
60 #define SEL_IN 1
61 #define SEL_OUT 2
62 #define SEL_EX 4
63
64
65
66
67 #define MS_RDONLY 1
68 #define MS_NOSUID 2
69 #define MS_NODEV 4
70 #define MS_NOEXEC 8
71 #define MS_SYNC 16
72 #define MS_REMOUNT 32
73
74
75
76
77 #define MS_RMT_MASK (MS_RDONLY)
78
79
80
81
82 #define MS_MGC_VAL 0xC0ED0000
83 #define MS_MGC_MSK 0xffff0000
84
85
86
87
88
89
90
91
92
93 #define IS_RDONLY(inode) (((inode)->i_sb) && ((inode)->i_sb->s_flags & MS_RDONLY))
94 #define IS_NOSUID(inode) ((inode)->i_flags & MS_NOSUID)
95 #define IS_NODEV(inode) ((inode)->i_flags & MS_NODEV)
96 #define IS_NOEXEC(inode) ((inode)->i_flags & MS_NOEXEC)
97 #define IS_SYNC(inode) ((inode)->i_flags & MS_SYNC)
98
99
100
101
102 #define BLKROSET 4701
103 #define BLKROGET 4702
104 #define BLKRRPART 4703
105 #define BLKGETSIZE 4704
106 #define BLKFLSBUF 4705
107 #define BLKRASET 4706
108
109
110
111 #define SCSI_IOCTL_GET_IDLUN 0x5382
112
113
114
115 #define SCSI_IOCTL_TAGGED_ENABLE 0x5383
116 #define SCSI_IOCTL_TAGGED_DISABLE 0x5384
117
118
119 #define BMAP_IOCTL 1
120 #define FIBMAP 1
121 #define FIGETBSZ 2
122
123
124
125 #define NOTIFY_SIZE 1
126 #define NOTIFY_MODE 2
127 #define NOTIFY_TIME 4
128 #define NOTIFY_UIDGID 8
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 unsigned char b_req;
142 unsigned char b_list;
143 unsigned char b_retain;
144
145 unsigned long b_flushtime;
146 unsigned long b_lru_time;
147 struct wait_queue * b_wait;
148 struct buffer_head * b_prev;
149 struct buffer_head * b_next;
150 struct buffer_head * b_prev_free;
151 struct buffer_head * b_next_free;
152 struct buffer_head * b_this_page;
153 struct buffer_head * b_reqnext;
154 };
155
156 #include <linux/pipe_fs_i.h>
157 #include <linux/minix_fs_i.h>
158 #include <linux/ext_fs_i.h>
159 #include <linux/ext2_fs_i.h>
160 #include <linux/hpfs_fs_i.h>
161 #include <linux/msdos_fs_i.h>
162 #include <linux/umsdos_fs_i.h>
163 #include <linux/iso_fs_i.h>
164 #include <linux/nfs_fs_i.h>
165 #include <linux/xia_fs_i.h>
166 #include <linux/sysv_fs_i.h>
167
168 #ifdef __KERNEL__
169
170 struct inode {
171 dev_t i_dev;
172 unsigned long i_ino;
173 umode_t i_mode;
174 nlink_t i_nlink;
175 uid_t i_uid;
176 gid_t i_gid;
177 dev_t i_rdev;
178 off_t i_size;
179 time_t i_atime;
180 time_t i_mtime;
181 time_t i_ctime;
182 unsigned long i_blksize;
183 unsigned long i_blocks;
184 unsigned long i_version;
185 struct semaphore i_sem;
186 struct inode_operations * i_op;
187 struct super_block * i_sb;
188 struct wait_queue * i_wait;
189 struct file_lock * i_flock;
190 struct vm_area_struct * i_mmap;
191 struct inode * i_next, * i_prev;
192 struct inode * i_hash_next, * i_hash_prev;
193 struct inode * i_bound_to, * i_bound_by;
194 struct inode * i_mount;
195 struct socket * i_socket;
196 unsigned short i_count;
197 unsigned short i_flags;
198 unsigned char i_lock;
199 unsigned char i_dirt;
200 unsigned char i_pipe;
201 unsigned char i_seek;
202 unsigned char i_update;
203 union {
204 struct pipe_inode_info pipe_i;
205 struct minix_inode_info minix_i;
206 struct ext_inode_info ext_i;
207 struct ext2_inode_info ext2_i;
208 struct hpfs_inode_info hpfs_i;
209 struct msdos_inode_info msdos_i;
210 struct umsdos_inode_info umsdos_i;
211 struct iso_inode_info isofs_i;
212 struct nfs_inode_info nfs_i;
213 struct xiafs_inode_info xiafs_i;
214 struct sysv_inode_info sysv_i;
215 void * generic_ip;
216 } u;
217 };
218
219 struct file {
220 mode_t f_mode;
221 off_t f_pos;
222 unsigned short f_flags;
223 unsigned short f_count;
224 off_t f_reada;
225 struct file *f_next, *f_prev;
226 int f_owner;
227 struct inode * f_inode;
228 struct file_operations * f_op;
229 void *private_data;
230 };
231
232 struct file_lock {
233 struct file_lock *fl_next;
234 struct task_struct *fl_owner;
235 unsigned int fl_fd;
236 struct wait_queue *fl_wait;
237 char fl_type;
238 char fl_whence;
239 off_t fl_start;
240 off_t fl_end;
241 };
242
243 struct fasync_struct {
244 int magic;
245 struct fasync_struct *fa_next;
246 struct file *fa_file;
247 };
248
249 #define FASYNC_MAGIC 0x4601
250
251 #include <linux/minix_fs_sb.h>
252 #include <linux/ext_fs_sb.h>
253 #include <linux/ext2_fs_sb.h>
254 #include <linux/hpfs_fs_sb.h>
255 #include <linux/msdos_fs_sb.h>
256 #include <linux/iso_fs_sb.h>
257 #include <linux/nfs_fs_sb.h>
258 #include <linux/xia_fs_sb.h>
259 #include <linux/sysv_fs_sb.h>
260
261 struct super_block {
262 dev_t s_dev;
263 unsigned long s_blocksize;
264 unsigned char s_blocksize_bits;
265 unsigned char s_lock;
266 unsigned char s_rd_only;
267 unsigned char s_dirt;
268 struct super_operations *s_op;
269 unsigned long s_flags;
270 unsigned long s_magic;
271 unsigned long s_time;
272 struct inode * s_covered;
273 struct inode * s_mounted;
274 struct wait_queue * s_wait;
275 union {
276 struct minix_sb_info minix_sb;
277 struct ext_sb_info ext_sb;
278 struct ext2_sb_info ext2_sb;
279 struct hpfs_sb_info hpfs_sb;
280 struct msdos_sb_info msdos_sb;
281 struct isofs_sb_info isofs_sb;
282 struct nfs_sb_info nfs_sb;
283 struct xiafs_sb_info xiafs_sb;
284 struct sysv_sb_info sysv_sb;
285 void *generic_sbp;
286 } u;
287 };
288
289 struct file_operations {
290 int (*lseek) (struct inode *, struct file *, off_t, int);
291 int (*read) (struct inode *, struct file *, char *, int);
292 int (*write) (struct inode *, struct file *, char *, int);
293 int (*readdir) (struct inode *, struct file *, struct dirent *, int);
294 int (*select) (struct inode *, struct file *, int, select_table *);
295 int (*ioctl) (struct inode *, struct file *, unsigned int, unsigned long);
296 int (*mmap) (struct inode *, struct file *, struct vm_area_struct *);
297 int (*open) (struct inode *, struct file *);
298 void (*release) (struct inode *, struct file *);
299 int (*fsync) (struct inode *, struct file *);
300 int (*fasync) (struct inode *, struct file *, int);
301 int (*check_media_change) (dev_t dev);
302 int (*revalidate) (dev_t dev);
303 };
304
305 struct inode_operations {
306 struct file_operations * default_file_ops;
307 int (*create) (struct inode *,const char *,int,int,struct inode **);
308 int (*lookup) (struct inode *,const char *,int,struct inode **);
309 int (*link) (struct inode *,struct inode *,const char *,int);
310 int (*unlink) (struct inode *,const char *,int);
311 int (*symlink) (struct inode *,const char *,int,const char *);
312 int (*mkdir) (struct inode *,const char *,int,int);
313 int (*rmdir) (struct inode *,const char *,int);
314 int (*mknod) (struct inode *,const char *,int,int,int);
315 int (*rename) (struct inode *,const char *,int,struct inode *,const char *,int);
316 int (*readlink) (struct inode *,char *,int);
317 int (*follow_link) (struct inode *,struct inode *,int,int,struct inode **);
318 int (*bmap) (struct inode *,int);
319 void (*truncate) (struct inode *);
320 int (*permission) (struct inode *, int);
321 int (*smap) (struct inode *,int);
322 };
323
324 struct super_operations {
325 void (*read_inode) (struct inode *);
326 int (*notify_change) (int flags, struct inode *);
327 void (*write_inode) (struct inode *);
328 void (*put_inode) (struct inode *);
329 void (*put_super) (struct super_block *);
330 void (*write_super) (struct super_block *);
331 void (*statfs) (struct super_block *, struct statfs *);
332 int (*remount_fs) (struct super_block *, int *, char *);
333 };
334
335 struct file_system_type {
336 struct super_block *(*read_super) (struct super_block *, void *, int);
337 char *name;
338 int requires_dev;
339 struct file_system_type * next;
340 };
341
342 extern int register_filesystem(struct file_system_type *);
343 extern int unregister_filesystem(struct file_system_type *);
344
345 asmlinkage int sys_open(const char *, int, int);
346 asmlinkage int sys_close(unsigned int);
347
348 extern void kill_fasync(struct fasync_struct *fa, int sig);
349
350 extern int getname(const char * filename, char **result);
351 extern void putname(char * name);
352
353 extern int register_blkdev(unsigned int, const char *, struct file_operations *);
354 extern int unregister_blkdev(unsigned int major, const char * name);
355 extern int blkdev_open(struct inode * inode, struct file * filp);
356 extern struct file_operations def_blk_fops;
357 extern struct inode_operations blkdev_inode_operations;
358
359 extern int register_chrdev(unsigned int, const char *, struct file_operations *);
360 extern int unregister_chrdev(unsigned int major, const char * name);
361 extern int chrdev_open(struct inode * inode, struct file * filp);
362 extern struct file_operations def_chr_fops;
363 extern struct inode_operations chrdev_inode_operations;
364
365 extern void init_fifo(struct inode * inode);
366
367 extern struct file_operations connecting_fifo_fops;
368 extern struct file_operations read_fifo_fops;
369 extern struct file_operations write_fifo_fops;
370 extern struct file_operations rdwr_fifo_fops;
371 extern struct file_operations read_pipe_fops;
372 extern struct file_operations write_pipe_fops;
373 extern struct file_operations rdwr_pipe_fops;
374
375 extern struct file_system_type *get_fs_type(char *name);
376
377 extern int fs_may_mount(dev_t dev);
378 extern int fs_may_umount(dev_t dev, struct inode * mount_root);
379 extern int fs_may_remount_ro(dev_t dev);
380
381 extern struct file *first_file;
382 extern int nr_files;
383 extern struct super_block super_blocks[NR_SUPER];
384
385 extern int shrink_buffers(unsigned int priority);
386 extern void refile_buffer(struct buffer_head * buf);
387 extern void set_writetime(struct buffer_head * buf, int flag);
388 extern void refill_freelist(int size);
389
390 extern struct buffer_head ** buffer_pages;
391 extern int nr_buffers;
392 extern int buffermem;
393 extern int nr_buffer_heads;
394
395 #define BUF_CLEAN 0
396 #define BUF_UNSHARED 1
397 #define BUF_LOCKED 2
398 #define BUF_LOCKED1 3
399 #define BUF_DIRTY 4
400 #define BUF_SHARED 5
401 #define NR_LIST 6
402
403 extern inline void mark_buffer_clean(struct buffer_head * bh)
404 {
405 if(bh->b_dirt) {
406 bh->b_dirt = 0;
407 if(bh->b_list == BUF_DIRTY) refile_buffer(bh);
408 }
409 }
410
411 extern inline void mark_buffer_dirty(struct buffer_head * bh, int flag)
412 {
413 if(!bh->b_dirt) {
414 bh->b_dirt = 1;
415 set_writetime(bh, flag);
416 if(bh->b_list != BUF_DIRTY) refile_buffer(bh);
417 }
418 }
419
420
421 extern int check_disk_change(dev_t dev);
422 extern void invalidate_inodes(dev_t dev);
423 extern void invalidate_buffers(dev_t dev);
424 extern void sync_inodes(dev_t dev);
425 extern void sync_dev(dev_t dev);
426 extern int fsync_dev(dev_t dev);
427 extern void sync_supers(dev_t dev);
428 extern int bmap(struct inode * inode,int block);
429 extern int notify_change(int flags, struct inode * inode);
430 extern int namei(const char * pathname, struct inode ** res_inode);
431 extern int lnamei(const char * pathname, struct inode ** res_inode);
432 extern int permission(struct inode * inode,int mask);
433 extern int open_namei(const char * pathname, int flag, int mode,
434 struct inode ** res_inode, struct inode * base);
435 extern int do_mknod(const char * filename, int mode, dev_t dev);
436 extern void iput(struct inode * inode);
437 extern struct inode * __iget(struct super_block * sb,int nr,int crsmnt);
438 extern struct inode * get_empty_inode(void);
439 extern void insert_inode_hash(struct inode *);
440 extern void clear_inode(struct inode *);
441 extern struct inode * get_pipe_inode(void);
442 extern struct file * get_empty_filp(void);
443 extern struct buffer_head * get_hash_table(dev_t dev, int block, int size);
444 extern struct buffer_head * getblk(dev_t dev, int block, int size);
445 extern void ll_rw_block(int rw, int nr, struct buffer_head * bh[]);
446 extern void ll_rw_page(int rw, int dev, int nr, char * buffer);
447 extern void ll_rw_swap_file(int rw, int dev, unsigned int *b, int nb, char *buffer);
448 extern void brelse(struct buffer_head * buf);
449 extern void set_blocksize(dev_t dev, int size);
450 extern struct buffer_head * bread(dev_t dev, int block, int size);
451 extern unsigned long bread_page(unsigned long addr,dev_t dev,int b[],int size,int no_share);
452 extern struct buffer_head * breada(dev_t dev,int block, int size,
453 unsigned int pos, unsigned int filesize);
454 extern void put_super(dev_t dev);
455 unsigned long generate_cluster(dev_t dev, int b[], int size);
456 extern dev_t ROOT_DEV;
457
458 extern void show_buffers(void);
459 extern void mount_root(void);
460
461 extern int char_read(struct inode *, struct file *, char *, int);
462 extern int block_read(struct inode *, struct file *, char *, int);
463 extern int read_ahead[];
464
465 extern int char_write(struct inode *, struct file *, char *, int);
466 extern int block_write(struct inode *, struct file *, char *, int);
467
468 extern int generic_mmap(struct inode *, struct file *, struct vm_area_struct *);
469
470 extern int block_fsync(struct inode *, struct file *);
471 extern int file_fsync(struct inode *, struct file *);
472
473 extern void dcache_add(struct inode *, const char *, int, unsigned long);
474 extern int dcache_lookup(struct inode *, const char *, int, unsigned long *);
475
476 extern inline struct inode * iget(struct super_block * sb,int nr)
477 {
478 return __iget(sb,nr,1);
479 }
480
481 #endif
482
483 #endif