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/vfs.h>
14 #include <linux/net.h>
15 #include <linux/kdev_t.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 BLOCK_SIZE 1024
33 #define BLOCK_SIZE_BITS 10
34
35 #define MAY_EXEC 1
36 #define MAY_WRITE 2
37 #define MAY_READ 4
38
39 #define READ 0
40 #define WRITE 1
41 #define READA 2
42 #define WRITEA 3
43
44 #ifndef NULL
45 #define NULL ((void *) 0)
46 #endif
47
48 #define NIL_FILP ((struct file *)0)
49 #define SEL_IN 1
50 #define SEL_OUT 2
51 #define SEL_EX 4
52
53
54
55
56 #define MS_RDONLY 1
57 #define MS_NOSUID 2
58 #define MS_NODEV 4
59 #define MS_NOEXEC 8
60 #define MS_SYNCHRONOUS 16
61 #define MS_REMOUNT 32
62
63 #define S_APPEND 256
64 #define S_IMMUTABLE 512
65
66
67
68
69 #define MS_RMT_MASK (MS_RDONLY)
70
71
72
73
74 #define MS_MGC_VAL 0xC0ED0000
75 #define MS_MGC_MSK 0xffff0000
76
77
78
79
80
81
82
83
84
85 #define IS_RDONLY(inode) (((inode)->i_sb) && ((inode)->i_sb->s_flags & MS_RDONLY))
86 #define IS_NOSUID(inode) ((inode)->i_flags & MS_NOSUID)
87 #define IS_NODEV(inode) ((inode)->i_flags & MS_NODEV)
88 #define IS_NOEXEC(inode) ((inode)->i_flags & MS_NOEXEC)
89 #define IS_SYNC(inode) ((inode)->i_flags & MS_SYNCHRONOUS)
90
91 #define IS_APPEND(inode) ((inode)->i_flags & S_APPEND)
92 #define IS_IMMUTABLE(inode) ((inode)->i_flags & S_IMMUTABLE)
93
94
95
96
97 #define BLKROSET 4701
98 #define BLKROGET 4702
99 #define BLKRRPART 4703
100 #define BLKGETSIZE 4704
101 #define BLKFLSBUF 4705
102 #define BLKRASET 4706
103 #define BLKRAGET 4707
104
105 #define BMAP_IOCTL 1
106 #define FIBMAP 1
107 #define FIGETBSZ 2
108
109 #ifdef __KERNEL__
110 extern void buffer_init(void);
111 extern unsigned long inode_init(unsigned long start, unsigned long end);
112 extern unsigned long file_table_init(unsigned long start, unsigned long end);
113 extern unsigned long name_cache_init(unsigned long start, unsigned long end);
114
115 typedef char buffer_block[BLOCK_SIZE];
116
117 struct buffer_head {
118 char * b_data;
119 unsigned long b_size;
120 unsigned long b_blocknr;
121 kdev_t b_dev;
122
123 unsigned short b_count;
124 unsigned char b_uptodate;
125 unsigned char b_dirt;
126 unsigned char b_lock;
127 unsigned char b_req;
128 unsigned char b_list;
129 unsigned char b_reuse;
130 unsigned long b_flushtime;
131 unsigned long b_lru_time;
132 struct wait_queue * b_wait;
133 struct buffer_head * b_prev;
134 struct buffer_head * b_next;
135 struct buffer_head * b_prev_free;
136 struct buffer_head * b_next_free;
137 struct buffer_head * b_this_page;
138 struct buffer_head * b_reqnext;
139 };
140
141 #include <linux/pipe_fs_i.h>
142 #include <linux/minix_fs_i.h>
143 #include <linux/ext_fs_i.h>
144 #include <linux/ext2_fs_i.h>
145 #include <linux/hpfs_fs_i.h>
146 #include <linux/msdos_fs_i.h>
147 #include <linux/umsdos_fs_i.h>
148 #include <linux/iso_fs_i.h>
149 #include <linux/nfs_fs_i.h>
150 #include <linux/xia_fs_i.h>
151 #include <linux/sysv_fs_i.h>
152
153
154
155
156
157 #define ATTR_MODE 1
158 #define ATTR_UID 2
159 #define ATTR_GID 4
160 #define ATTR_SIZE 8
161 #define ATTR_ATIME 16
162 #define ATTR_MTIME 32
163 #define ATTR_CTIME 64
164 #define ATTR_ATIME_SET 128
165 #define ATTR_MTIME_SET 256
166
167
168
169
170
171
172
173
174
175
176 struct iattr {
177 unsigned int ia_valid;
178 umode_t ia_mode;
179 uid_t ia_uid;
180 gid_t ia_gid;
181 off_t ia_size;
182 time_t ia_atime;
183 time_t ia_mtime;
184 time_t ia_ctime;
185 };
186
187 struct inode {
188 kdev_t i_dev;
189 unsigned long i_ino;
190 umode_t i_mode;
191 nlink_t i_nlink;
192 uid_t i_uid;
193 gid_t i_gid;
194 kdev_t i_rdev;
195 off_t i_size;
196 time_t i_atime;
197 time_t i_mtime;
198 time_t i_ctime;
199 unsigned long i_blksize;
200 unsigned long i_blocks;
201 unsigned long i_version;
202 struct semaphore i_sem;
203 struct inode_operations * i_op;
204 struct super_block * i_sb;
205 struct wait_queue * i_wait;
206 struct file_lock * i_flock;
207 struct vm_area_struct * i_mmap;
208 struct inode * i_next, * i_prev;
209 struct inode * i_hash_next, * i_hash_prev;
210 struct inode * i_bound_to, * i_bound_by;
211 struct inode * i_mount;
212 unsigned short i_count;
213 unsigned short i_wcount;
214 unsigned short i_flags;
215 unsigned char i_lock;
216 unsigned char i_dirt;
217 unsigned char i_pipe;
218 unsigned char i_sock;
219 unsigned char i_seek;
220 unsigned char i_update;
221 union {
222 struct pipe_inode_info pipe_i;
223 struct minix_inode_info minix_i;
224 struct ext_inode_info ext_i;
225 struct ext2_inode_info ext2_i;
226 struct hpfs_inode_info hpfs_i;
227 struct msdos_inode_info msdos_i;
228 struct umsdos_inode_info umsdos_i;
229 struct iso_inode_info isofs_i;
230 struct nfs_inode_info nfs_i;
231 struct xiafs_inode_info xiafs_i;
232 struct sysv_inode_info sysv_i;
233 struct socket socket_i;
234 void * generic_ip;
235 } u;
236 };
237
238 struct file {
239 mode_t f_mode;
240 loff_t f_pos;
241 unsigned short f_flags;
242 unsigned short f_count;
243 off_t f_reada;
244 struct file *f_next, *f_prev;
245 int f_owner;
246 struct inode * f_inode;
247 struct file_operations * f_op;
248 unsigned long f_version;
249 void *private_data;
250 };
251
252 struct file_lock {
253 struct file_lock *fl_next;
254 struct file_lock *fl_nextlink;
255 struct file_lock *fl_prevlink;
256 struct file_lock *fl_block;
257 struct task_struct *fl_owner;
258 struct wait_queue *fl_wait;
259 struct file *fl_file;
260 char fl_flags;
261 char fl_type;
262 off_t fl_start;
263 off_t fl_end;
264 };
265
266 struct fasync_struct {
267 int magic;
268 struct fasync_struct *fa_next;
269 struct file *fa_file;
270 };
271
272 #define FASYNC_MAGIC 0x4601
273
274 extern int fasync_helper(struct inode *, struct file *, int, struct fasync_struct **);
275
276 #include <linux/minix_fs_sb.h>
277 #include <linux/ext_fs_sb.h>
278 #include <linux/ext2_fs_sb.h>
279 #include <linux/hpfs_fs_sb.h>
280 #include <linux/msdos_fs_sb.h>
281 #include <linux/iso_fs_sb.h>
282 #include <linux/nfs_fs_sb.h>
283 #include <linux/xia_fs_sb.h>
284 #include <linux/sysv_fs_sb.h>
285
286 struct super_block {
287 kdev_t s_dev;
288 unsigned long s_blocksize;
289 unsigned char s_blocksize_bits;
290 unsigned char s_lock;
291 unsigned char s_rd_only;
292 unsigned char s_dirt;
293 struct file_system_type *s_type;
294 struct super_operations *s_op;
295 unsigned long s_flags;
296 unsigned long s_magic;
297 unsigned long s_time;
298 struct inode * s_covered;
299 struct inode * s_mounted;
300 struct wait_queue * s_wait;
301 union {
302 struct minix_sb_info minix_sb;
303 struct ext_sb_info ext_sb;
304 struct ext2_sb_info ext2_sb;
305 struct hpfs_sb_info hpfs_sb;
306 struct msdos_sb_info msdos_sb;
307 struct isofs_sb_info isofs_sb;
308 struct nfs_sb_info nfs_sb;
309 struct xiafs_sb_info xiafs_sb;
310 struct sysv_sb_info sysv_sb;
311 void *generic_sbp;
312 } u;
313 };
314
315
316
317
318
319
320
321 typedef int (*filldir_t)(void *, const char *, int, off_t, ino_t);
322
323 struct file_operations {
324 int (*lseek) (struct inode *, struct file *, off_t, int);
325 int (*read) (struct inode *, struct file *, char *, int);
326 int (*write) (struct inode *, struct file *, const char *, int);
327 int (*readdir) (struct inode *, struct file *, void *, filldir_t);
328 int (*select) (struct inode *, struct file *, int, select_table *);
329 int (*ioctl) (struct inode *, struct file *, unsigned int, unsigned long);
330 int (*mmap) (struct inode *, struct file *, struct vm_area_struct *);
331 int (*open) (struct inode *, struct file *);
332 void (*release) (struct inode *, struct file *);
333 int (*fsync) (struct inode *, struct file *);
334 int (*fasync) (struct inode *, struct file *, int);
335 int (*check_media_change) (kdev_t dev);
336 int (*revalidate) (kdev_t dev);
337 };
338
339 struct inode_operations {
340 struct file_operations * default_file_ops;
341 int (*create) (struct inode *,const char *,int,int,struct inode **);
342 int (*lookup) (struct inode *,const char *,int,struct inode **);
343 int (*link) (struct inode *,struct inode *,const char *,int);
344 int (*unlink) (struct inode *,const char *,int);
345 int (*symlink) (struct inode *,const char *,int,const char *);
346 int (*mkdir) (struct inode *,const char *,int,int);
347 int (*rmdir) (struct inode *,const char *,int);
348 int (*mknod) (struct inode *,const char *,int,int,int);
349 int (*rename) (struct inode *,const char *,int,struct inode *,const char *,int);
350 int (*readlink) (struct inode *,char *,int);
351 int (*follow_link) (struct inode *,struct inode *,int,int,struct inode **);
352 int (*bmap) (struct inode *,int);
353 void (*truncate) (struct inode *);
354 int (*permission) (struct inode *, int);
355 int (*smap) (struct inode *,int);
356 };
357
358 struct super_operations {
359 void (*read_inode) (struct inode *);
360 int (*notify_change) (struct inode *, struct iattr *);
361 void (*write_inode) (struct inode *);
362 void (*put_inode) (struct inode *);
363 void (*put_super) (struct super_block *);
364 void (*write_super) (struct super_block *);
365 void (*statfs) (struct super_block *, struct statfs *, int);
366 int (*remount_fs) (struct super_block *, int *, char *);
367 };
368
369 struct file_system_type {
370 struct super_block *(*read_super) (struct super_block *, void *, int);
371 const char *name;
372 int requires_dev;
373 struct file_system_type * next;
374 };
375
376 extern int register_filesystem(struct file_system_type *);
377 extern int unregister_filesystem(struct file_system_type *);
378
379 asmlinkage int sys_open(const char *, int, int);
380 asmlinkage int sys_close(unsigned int);
381
382 extern void kill_fasync(struct fasync_struct *fa, int sig);
383
384 extern int getname(const char * filename, char **result);
385 extern void putname(char * name);
386
387 extern int register_blkdev(unsigned int, const char *, struct file_operations *);
388 extern int unregister_blkdev(unsigned int major, const char * name);
389 extern int blkdev_open(struct inode * inode, struct file * filp);
390 extern struct file_operations def_blk_fops;
391 extern struct inode_operations blkdev_inode_operations;
392
393 extern int register_chrdev(unsigned int, const char *, struct file_operations *);
394 extern int unregister_chrdev(unsigned int major, const char * name);
395 extern int chrdev_open(struct inode * inode, struct file * filp);
396 extern struct file_operations def_chr_fops;
397 extern struct inode_operations chrdev_inode_operations;
398
399 extern void init_fifo(struct inode * inode);
400
401 extern struct file_operations connecting_fifo_fops;
402 extern struct file_operations read_fifo_fops;
403 extern struct file_operations write_fifo_fops;
404 extern struct file_operations rdwr_fifo_fops;
405 extern struct file_operations read_pipe_fops;
406 extern struct file_operations write_pipe_fops;
407 extern struct file_operations rdwr_pipe_fops;
408
409 extern struct file_system_type *get_fs_type(const char *name);
410
411 extern int fs_may_mount(kdev_t dev);
412 extern int fs_may_umount(kdev_t dev, struct inode * mount_root);
413 extern int fs_may_remount_ro(kdev_t dev);
414
415 extern struct file *first_file;
416 extern int nr_files;
417 extern struct super_block super_blocks[NR_SUPER];
418
419 extern int shrink_buffers(unsigned int priority, unsigned long limit);
420 extern void refile_buffer(struct buffer_head * buf);
421 extern void set_writetime(struct buffer_head * buf, int flag);
422 extern void refill_freelist(int size);
423
424 extern struct buffer_head ** buffer_pages;
425 extern int nr_buffers;
426 extern int buffermem;
427 extern int nr_buffer_heads;
428
429 #define BUF_CLEAN 0
430 #define BUF_UNSHARED 1
431 #define BUF_LOCKED 2
432 #define BUF_LOCKED1 3
433 #define BUF_DIRTY 4
434 #define BUF_SHARED 5
435 #define NR_LIST 6
436
437 extern inline void mark_buffer_clean(struct buffer_head * bh)
438 {
439 if(bh->b_dirt) {
440 bh->b_dirt = 0;
441 if(bh->b_list == BUF_DIRTY) refile_buffer(bh);
442 }
443 }
444
445 extern inline void mark_buffer_dirty(struct buffer_head * bh, int flag)
446 {
447 if(!bh->b_dirt) {
448 bh->b_dirt = 1;
449 set_writetime(bh, flag);
450 if(bh->b_list != BUF_DIRTY) refile_buffer(bh);
451 }
452 }
453
454
455 extern int check_disk_change(kdev_t dev);
456 extern void invalidate_inodes(kdev_t dev);
457 extern void invalidate_buffers(kdev_t dev);
458 extern int floppy_is_wp(int minor);
459 extern void sync_inodes(kdev_t dev);
460 extern void sync_dev(kdev_t dev);
461 extern int fsync_dev(kdev_t dev);
462 extern void sync_supers(kdev_t dev);
463 extern int bmap(struct inode * inode,int block);
464 extern int notify_change(struct inode *, struct iattr *);
465 extern int namei(const char * pathname, struct inode ** res_inode);
466 extern int lnamei(const char * pathname, struct inode ** res_inode);
467 extern int permission(struct inode * inode,int mask);
468 extern int get_write_access(struct inode * inode);
469 extern void put_write_access(struct inode * inode);
470 extern int open_namei(const char * pathname, int flag, int mode,
471 struct inode ** res_inode, struct inode * base);
472 extern int do_mknod(const char * filename, int mode, dev_t dev);
473 extern int do_pipe(int *);
474 extern void iput(struct inode * inode);
475 extern struct inode * __iget(struct super_block * sb,int nr,int crsmnt);
476 extern struct inode * get_empty_inode(void);
477 extern void insert_inode_hash(struct inode *);
478 extern void clear_inode(struct inode *);
479 extern struct inode * get_pipe_inode(void);
480 extern struct file * get_empty_filp(void);
481 extern int close_fp(struct file *filp);
482 extern struct buffer_head * get_hash_table(kdev_t dev, int block, int size);
483 extern struct buffer_head * getblk(kdev_t dev, int block, int size);
484 extern void ll_rw_block(int rw, int nr, struct buffer_head * bh[]);
485 extern void ll_rw_page(int rw, kdev_t dev, unsigned long nr, char * buffer);
486 extern void ll_rw_swap_file(int rw, kdev_t dev, unsigned int *b, int nb, char *buffer);
487 extern int is_read_only(kdev_t dev);
488 extern void brelse(struct buffer_head * buf);
489 extern void set_blocksize(kdev_t dev, int size);
490 extern struct buffer_head * bread(kdev_t dev, int block, int size);
491 extern unsigned long bread_page(unsigned long addr,kdev_t dev,int b[],int size,int no_share);
492 extern void bwrite_page(unsigned long addr,kdev_t dev,int b[],int size);
493 extern struct buffer_head * breada(kdev_t dev,int block, int size,
494 unsigned int pos, unsigned int filesize);
495 extern void put_super(kdev_t dev);
496 unsigned long generate_cluster(kdev_t dev, int b[], int size);
497 extern kdev_t ROOT_DEV;
498
499 extern void show_buffers(void);
500 extern void mount_root(void);
501
502 extern int char_read(struct inode *, struct file *, char *, int);
503 extern int block_read(struct inode *, struct file *, char *, int);
504 extern int read_ahead[];
505
506 extern int char_write(struct inode *, struct file *, const char *, int);
507 extern int block_write(struct inode *, struct file *, const char *, int);
508
509 extern int generic_mmap(struct inode *, struct file *, struct vm_area_struct *);
510
511 extern int block_fsync(struct inode *, struct file *);
512 extern int file_fsync(struct inode *, struct file *);
513
514 extern void dcache_add(struct inode *, const char *, int, unsigned long);
515 extern int dcache_lookup(struct inode *, const char *, int, unsigned long *);
516
517 extern int inode_change_ok(struct inode *, struct iattr *);
518 extern void inode_setattr(struct inode *, struct iattr *);
519
520 extern inline struct inode * iget(struct super_block * sb,int nr)
521 {
522 return __iget(sb,nr,1);
523 }
524
525 #endif
526
527 #endif