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
16
17
18
19
20
21
22
23
24 #undef NR_OPEN
25 #define NR_OPEN 256
26
27 #define NR_INODE 2048
28 #define NR_FILE 1024
29 #define NR_SUPER 32
30 #define NR_IHASH 131
31 #define BLOCK_SIZE 1024
32 #define BLOCK_SIZE_BITS 10
33
34 #define MAY_EXEC 1
35 #define MAY_WRITE 2
36 #define MAY_READ 4
37
38 #define READ 0
39 #define WRITE 1
40 #define READA 2
41 #define WRITEA 3
42
43 extern void buffer_init(void);
44 extern unsigned long inode_init(unsigned long start, unsigned long end);
45 extern unsigned long file_table_init(unsigned long start, unsigned long end);
46 extern unsigned long name_cache_init(unsigned long start, unsigned long end);
47
48 #define MAJOR(a) (int)((unsigned short)(a) >> 8)
49 #define MINOR(a) (int)((unsigned short)(a) & 0xFF)
50 #define MKDEV(a,b) ((int)((((a) & 0xff) << 8) | ((b) & 0xff)))
51 #define NODEV MKDEV(0,0)
52
53 #ifndef NULL
54 #define NULL ((void *) 0)
55 #endif
56
57 #define NIL_FILP ((struct file *)0)
58 #define SEL_IN 1
59 #define SEL_OUT 2
60 #define SEL_EX 4
61
62
63
64
65 #define MS_RDONLY 1
66 #define MS_NOSUID 2
67 #define MS_NODEV 4
68 #define MS_NOEXEC 8
69 #define MS_SYNCHRONOUS 16
70 #define MS_REMOUNT 32
71
72 #define S_APPEND 256
73 #define S_IMMUTABLE 512
74
75
76
77
78 #define MS_RMT_MASK (MS_RDONLY)
79
80
81
82
83 #define MS_MGC_VAL 0xC0ED0000
84 #define MS_MGC_MSK 0xffff0000
85
86
87
88
89
90
91
92
93
94 #define IS_RDONLY(inode) (((inode)->i_sb) && ((inode)->i_sb->s_flags & MS_RDONLY))
95 #define IS_NOSUID(inode) ((inode)->i_flags & MS_NOSUID)
96 #define IS_NODEV(inode) ((inode)->i_flags & MS_NODEV)
97 #define IS_NOEXEC(inode) ((inode)->i_flags & MS_NOEXEC)
98 #define IS_SYNC(inode) ((inode)->i_flags & MS_SYNCHRONOUS)
99
100 #define IS_APPEND(inode) ((inode)->i_flags & S_APPEND)
101 #define IS_IMMUTABLE(inode) ((inode)->i_flags & S_IMMUTABLE)
102
103
104
105
106 #define BLKROSET 4701
107 #define BLKROGET 4702
108 #define BLKRRPART 4703
109 #define BLKGETSIZE 4704
110 #define BLKFLSBUF 4705
111 #define BLKRASET 4706
112 #define BLKRAGET 4707
113
114 #define BMAP_IOCTL 1
115 #define FIBMAP 1
116 #define FIGETBSZ 2
117
118 typedef char buffer_block[BLOCK_SIZE];
119
120 struct buffer_head {
121 char * b_data;
122 unsigned long b_size;
123 unsigned long b_blocknr;
124 dev_t b_dev;
125 unsigned short b_count;
126 unsigned char b_uptodate;
127 unsigned char b_dirt;
128 unsigned char b_lock;
129 unsigned char b_req;
130 unsigned char b_list;
131 unsigned char b_reuse;
132 unsigned long b_flushtime;
133 unsigned long b_lru_time;
134 struct wait_queue * b_wait;
135 struct buffer_head * b_prev;
136 struct buffer_head * b_next;
137 struct buffer_head * b_prev_free;
138 struct buffer_head * b_next_free;
139 struct buffer_head * b_this_page;
140 struct buffer_head * b_reqnext;
141 };
142
143 #include <linux/pipe_fs_i.h>
144 #include <linux/minix_fs_i.h>
145 #include <linux/ext_fs_i.h>
146 #include <linux/ext2_fs_i.h>
147 #include <linux/hpfs_fs_i.h>
148 #include <linux/msdos_fs_i.h>
149 #include <linux/umsdos_fs_i.h>
150 #include <linux/iso_fs_i.h>
151 #include <linux/nfs_fs_i.h>
152 #include <linux/xia_fs_i.h>
153 #include <linux/sysv_fs_i.h>
154
155 #ifdef __KERNEL__
156
157
158
159
160
161 #define ATTR_MODE 1
162 #define ATTR_UID 2
163 #define ATTR_GID 4
164 #define ATTR_SIZE 8
165 #define ATTR_ATIME 16
166 #define ATTR_MTIME 32
167 #define ATTR_CTIME 64
168 #define ATTR_ATIME_SET 128
169 #define ATTR_MTIME_SET 256
170
171
172
173
174
175
176
177
178
179
180 struct iattr {
181 unsigned int ia_valid;
182 umode_t ia_mode;
183 uid_t ia_uid;
184 gid_t ia_gid;
185 off_t ia_size;
186 time_t ia_atime;
187 time_t ia_mtime;
188 time_t ia_ctime;
189 };
190
191 struct inode {
192 dev_t i_dev;
193 unsigned long i_ino;
194 umode_t i_mode;
195 nlink_t i_nlink;
196 uid_t i_uid;
197 gid_t i_gid;
198 dev_t i_rdev;
199 off_t i_size;
200 time_t i_atime;
201 time_t i_mtime;
202 time_t i_ctime;
203 unsigned long i_blksize;
204 unsigned long i_blocks;
205 unsigned long i_version;
206 struct semaphore i_sem;
207 struct inode_operations * i_op;
208 struct super_block * i_sb;
209 struct wait_queue * i_wait;
210 struct file_lock * i_flock;
211 struct vm_area_struct * i_mmap;
212 struct inode * i_next, * i_prev;
213 struct inode * i_hash_next, * i_hash_prev;
214 struct inode * i_bound_to, * i_bound_by;
215 struct inode * i_mount;
216 unsigned short i_count;
217 unsigned short i_wcount;
218 unsigned short i_flags;
219 unsigned char i_lock;
220 unsigned char i_dirt;
221 unsigned char i_pipe;
222 unsigned char i_sock;
223 unsigned char i_seek;
224 unsigned char i_update;
225 union {
226 struct pipe_inode_info pipe_i;
227 struct minix_inode_info minix_i;
228 struct ext_inode_info ext_i;
229 struct ext2_inode_info ext2_i;
230 struct hpfs_inode_info hpfs_i;
231 struct msdos_inode_info msdos_i;
232 struct umsdos_inode_info umsdos_i;
233 struct iso_inode_info isofs_i;
234 struct nfs_inode_info nfs_i;
235 struct xiafs_inode_info xiafs_i;
236 struct sysv_inode_info sysv_i;
237 struct socket socket_i;
238 void * generic_ip;
239 } u;
240 };
241
242 struct file {
243 mode_t f_mode;
244 loff_t f_pos;
245 unsigned short f_flags;
246 unsigned short f_count;
247 off_t f_reada;
248 struct file *f_next, *f_prev;
249 int f_owner;
250 struct inode * f_inode;
251 struct file_operations * f_op;
252 unsigned long f_version;
253 void *private_data;
254 };
255
256 struct file_lock {
257 struct file_lock *fl_next;
258 struct file_lock *fl_nextlink;
259 struct file_lock *fl_prevlink;
260 struct file_lock *fl_block;
261 struct task_struct *fl_owner;
262 struct wait_queue *fl_wait;
263 struct file *fl_file;
264 char fl_flags;
265 char fl_type;
266 off_t fl_start;
267 off_t fl_end;
268 };
269
270 struct fasync_struct {
271 int magic;
272 struct fasync_struct *fa_next;
273 struct file *fa_file;
274 };
275
276 #define FASYNC_MAGIC 0x4601
277
278 extern int fasync_helper(struct inode *, struct file *, int, struct fasync_struct **);
279
280 #include <linux/minix_fs_sb.h>
281 #include <linux/ext_fs_sb.h>
282 #include <linux/ext2_fs_sb.h>
283 #include <linux/hpfs_fs_sb.h>
284 #include <linux/msdos_fs_sb.h>
285 #include <linux/iso_fs_sb.h>
286 #include <linux/nfs_fs_sb.h>
287 #include <linux/xia_fs_sb.h>
288 #include <linux/sysv_fs_sb.h>
289
290 struct super_block {
291 dev_t s_dev;
292 unsigned long s_blocksize;
293 unsigned char s_blocksize_bits;
294 unsigned char s_lock;
295 unsigned char s_rd_only;
296 unsigned char s_dirt;
297 struct file_system_type *s_type;
298 struct super_operations *s_op;
299 unsigned long s_flags;
300 unsigned long s_magic;
301 unsigned long s_time;
302 struct inode * s_covered;
303 struct inode * s_mounted;
304 struct wait_queue * s_wait;
305 union {
306 struct minix_sb_info minix_sb;
307 struct ext_sb_info ext_sb;
308 struct ext2_sb_info ext2_sb;
309 struct hpfs_sb_info hpfs_sb;
310 struct msdos_sb_info msdos_sb;
311 struct isofs_sb_info isofs_sb;
312 struct nfs_sb_info nfs_sb;
313 struct xiafs_sb_info xiafs_sb;
314 struct sysv_sb_info sysv_sb;
315 void *generic_sbp;
316 } u;
317 };
318
319
320
321
322
323
324
325 typedef int (*filldir_t)(void *, const char *, int, off_t, ino_t);
326
327 struct file_operations {
328 int (*lseek) (struct inode *, struct file *, off_t, int);
329 int (*read) (struct inode *, struct file *, char *, int);
330 int (*write) (struct inode *, struct file *, const char *, int);
331 int (*readdir) (struct inode *, struct file *, void *, filldir_t);
332 int (*select) (struct inode *, struct file *, int, select_table *);
333 int (*ioctl) (struct inode *, struct file *, unsigned int, unsigned long);
334 int (*mmap) (struct inode *, struct file *, struct vm_area_struct *);
335 int (*open) (struct inode *, struct file *);
336 void (*release) (struct inode *, struct file *);
337 int (*fsync) (struct inode *, struct file *);
338 int (*fasync) (struct inode *, struct file *, int);
339 int (*check_media_change) (dev_t dev);
340 int (*revalidate) (dev_t dev);
341 };
342
343 struct inode_operations {
344 struct file_operations * default_file_ops;
345 int (*create) (struct inode *,const char *,int,int,struct inode **);
346 int (*lookup) (struct inode *,const char *,int,struct inode **);
347 int (*link) (struct inode *,struct inode *,const char *,int);
348 int (*unlink) (struct inode *,const char *,int);
349 int (*symlink) (struct inode *,const char *,int,const char *);
350 int (*mkdir) (struct inode *,const char *,int,int);
351 int (*rmdir) (struct inode *,const char *,int);
352 int (*mknod) (struct inode *,const char *,int,int,int);
353 int (*rename) (struct inode *,const char *,int,struct inode *,const char *,int);
354 int (*readlink) (struct inode *,char *,int);
355 int (*follow_link) (struct inode *,struct inode *,int,int,struct inode **);
356 int (*bmap) (struct inode *,int);
357 void (*truncate) (struct inode *);
358 int (*permission) (struct inode *, int);
359 int (*smap) (struct inode *,int);
360 };
361
362 struct super_operations {
363 void (*read_inode) (struct inode *);
364 int (*notify_change) (struct inode *, struct iattr *);
365 void (*write_inode) (struct inode *);
366 void (*put_inode) (struct inode *);
367 void (*put_super) (struct super_block *);
368 void (*write_super) (struct super_block *);
369 void (*statfs) (struct super_block *, struct statfs *, int);
370 int (*remount_fs) (struct super_block *, int *, char *);
371 };
372
373 struct file_system_type {
374 struct super_block *(*read_super) (struct super_block *, void *, int);
375 const char *name;
376 int requires_dev;
377 struct file_system_type * next;
378 };
379
380 extern int register_filesystem(struct file_system_type *);
381 extern int unregister_filesystem(struct file_system_type *);
382
383 asmlinkage int sys_open(const char *, int, int);
384 asmlinkage int sys_close(unsigned int);
385
386 extern void kill_fasync(struct fasync_struct *fa, int sig);
387
388 extern int getname(const char * filename, char **result);
389 extern void putname(char * name);
390
391 extern int register_blkdev(unsigned int, const char *, struct file_operations *);
392 extern int unregister_blkdev(unsigned int major, const char * name);
393 extern int blkdev_open(struct inode * inode, struct file * filp);
394 extern struct file_operations def_blk_fops;
395 extern struct inode_operations blkdev_inode_operations;
396
397 extern int register_chrdev(unsigned int, const char *, struct file_operations *);
398 extern int unregister_chrdev(unsigned int major, const char * name);
399 extern int chrdev_open(struct inode * inode, struct file * filp);
400 extern struct file_operations def_chr_fops;
401 extern struct inode_operations chrdev_inode_operations;
402
403 extern void init_fifo(struct inode * inode);
404
405 extern struct file_operations connecting_fifo_fops;
406 extern struct file_operations read_fifo_fops;
407 extern struct file_operations write_fifo_fops;
408 extern struct file_operations rdwr_fifo_fops;
409 extern struct file_operations read_pipe_fops;
410 extern struct file_operations write_pipe_fops;
411 extern struct file_operations rdwr_pipe_fops;
412
413 extern struct file_system_type *get_fs_type(const char *name);
414
415 extern int fs_may_mount(dev_t dev);
416 extern int fs_may_umount(dev_t dev, struct inode * mount_root);
417 extern int fs_may_remount_ro(dev_t dev);
418
419 extern struct file *first_file;
420 extern int nr_files;
421 extern struct super_block super_blocks[NR_SUPER];
422
423 extern int shrink_buffers(unsigned int priority, unsigned long limit);
424 extern void refile_buffer(struct buffer_head * buf);
425 extern void set_writetime(struct buffer_head * buf, int flag);
426 extern void refill_freelist(int size);
427
428 extern struct buffer_head ** buffer_pages;
429 extern int nr_buffers;
430 extern int buffermem;
431 extern int nr_buffer_heads;
432
433 #define BUF_CLEAN 0
434 #define BUF_UNSHARED 1
435 #define BUF_LOCKED 2
436 #define BUF_LOCKED1 3
437 #define BUF_DIRTY 4
438 #define BUF_SHARED 5
439 #define NR_LIST 6
440
441 extern inline void mark_buffer_clean(struct buffer_head * bh)
442 {
443 if(bh->b_dirt) {
444 bh->b_dirt = 0;
445 if(bh->b_list == BUF_DIRTY) refile_buffer(bh);
446 }
447 }
448
449 extern inline void mark_buffer_dirty(struct buffer_head * bh, int flag)
450 {
451 if(!bh->b_dirt) {
452 bh->b_dirt = 1;
453 set_writetime(bh, flag);
454 if(bh->b_list != BUF_DIRTY) refile_buffer(bh);
455 }
456 }
457
458
459 extern int check_disk_change(dev_t dev);
460 extern void invalidate_inodes(dev_t dev);
461 extern void invalidate_buffers(dev_t dev);
462 extern int floppy_is_wp(int minor);
463 extern void sync_inodes(dev_t dev);
464 extern void sync_dev(dev_t dev);
465 extern int fsync_dev(dev_t dev);
466 extern void sync_supers(dev_t dev);
467 extern int bmap(struct inode * inode,int block);
468 extern int notify_change(struct inode *, struct iattr *);
469 extern int namei(const char * pathname, struct inode ** res_inode);
470 extern int lnamei(const char * pathname, struct inode ** res_inode);
471 extern int permission(struct inode * inode,int mask);
472 extern int get_write_access(struct inode * inode);
473 extern void put_write_access(struct inode * inode);
474 extern int open_namei(const char * pathname, int flag, int mode,
475 struct inode ** res_inode, struct inode * base);
476 extern int do_mknod(const char * filename, int mode, dev_t dev);
477 extern int do_pipe(int *);
478 extern void iput(struct inode * inode);
479 extern struct inode * __iget(struct super_block * sb,int nr,int crsmnt);
480 extern struct inode * get_empty_inode(void);
481 extern void insert_inode_hash(struct inode *);
482 extern void clear_inode(struct inode *);
483 extern struct inode * get_pipe_inode(void);
484 extern struct file * get_empty_filp(void);
485 extern int close_fp(struct file *filp);
486 extern struct buffer_head * get_hash_table(dev_t dev, int block, int size);
487 extern struct buffer_head * getblk(dev_t dev, int block, int size);
488 extern void ll_rw_block(int rw, int nr, struct buffer_head * bh[]);
489 extern void ll_rw_page(int rw, int dev, unsigned long nr, char * buffer);
490 extern void ll_rw_swap_file(int rw, int dev, unsigned int *b, int nb, char *buffer);
491 extern int is_read_only(int dev);
492 extern void brelse(struct buffer_head * buf);
493 extern void set_blocksize(dev_t dev, int size);
494 extern struct buffer_head * bread(dev_t dev, int block, int size);
495 extern unsigned long bread_page(unsigned long addr,dev_t dev,int b[],int size,int no_share);
496 extern void bwrite_page(unsigned long addr,dev_t dev,int b[],int size);
497 extern struct buffer_head * breada(dev_t dev,int block, int size,
498 unsigned int pos, unsigned int filesize);
499 extern void put_super(dev_t dev);
500 unsigned long generate_cluster(dev_t dev, int b[], int size);
501 extern dev_t ROOT_DEV;
502
503 extern void show_buffers(void);
504 extern void mount_root(void);
505
506 extern int char_read(struct inode *, struct file *, char *, int);
507 extern int block_read(struct inode *, struct file *, char *, int);
508 extern int read_ahead[];
509
510 extern int char_write(struct inode *, struct file *, const char *, int);
511 extern int block_write(struct inode *, struct file *, const char *, int);
512
513 extern int generic_mmap(struct inode *, struct file *, struct vm_area_struct *);
514
515 extern int block_fsync(struct inode *, struct file *);
516 extern int file_fsync(struct inode *, struct file *);
517
518 extern void dcache_add(struct inode *, const char *, int, unsigned long);
519 extern int dcache_lookup(struct inode *, const char *, int, unsigned long *);
520
521 extern int inode_change_ok(struct inode *, struct iattr *);
522 extern void inode_setattr(struct inode *, struct iattr *);
523
524 extern inline struct inode * iget(struct super_block * sb,int nr)
525 {
526 return __iget(sb,nr,1);
527 }
528
529 #endif
530
531 #endif