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 #define S_APPEND 256
75 #define S_IMMUTABLE 512
76
77
78
79
80 #define MS_RMT_MASK (MS_RDONLY)
81
82
83
84
85 #define MS_MGC_VAL 0xC0ED0000
86 #define MS_MGC_MSK 0xffff0000
87
88
89
90
91
92
93
94
95
96 #define IS_RDONLY(inode) (((inode)->i_sb) && ((inode)->i_sb->s_flags & MS_RDONLY))
97 #define IS_NOSUID(inode) ((inode)->i_flags & MS_NOSUID)
98 #define IS_NODEV(inode) ((inode)->i_flags & MS_NODEV)
99 #define IS_NOEXEC(inode) ((inode)->i_flags & MS_NOEXEC)
100 #define IS_SYNC(inode) ((inode)->i_flags & MS_SYNC)
101
102 #define IS_APPEND(inode) ((inode)->i_flags & S_APPEND)
103 #define IS_IMMUTABLE(inode) ((inode)->i_flags & S_IMMUTABLE)
104
105
106
107
108 #define BLKROSET 4701
109 #define BLKROGET 4702
110 #define BLKRRPART 4703
111 #define BLKGETSIZE 4704
112 #define BLKFLSBUF 4705
113 #define BLKRASET 4706
114 #define BLKRAGET 4707
115
116
117
118 #define SCSI_IOCTL_GET_IDLUN 0x5382
119
120
121
122 #define SCSI_IOCTL_TAGGED_ENABLE 0x5383
123 #define SCSI_IOCTL_TAGGED_DISABLE 0x5384
124
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 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
171
172
173
174 #define ATTR_MODE 1
175 #define ATTR_UID 2
176 #define ATTR_GID 4
177 #define ATTR_SIZE 8
178 #define ATTR_ATIME 16
179 #define ATTR_MTIME 32
180 #define ATTR_CTIME 64
181
182
183
184
185
186
187
188
189
190
191 struct iattr {
192 unsigned int ia_valid;
193 umode_t ia_mode;
194 uid_t ia_uid;
195 gid_t ia_gid;
196 off_t ia_size;
197 time_t ia_atime;
198 time_t ia_mtime;
199 time_t ia_ctime;
200 };
201
202 struct inode {
203 dev_t i_dev;
204 unsigned long i_ino;
205 umode_t i_mode;
206 nlink_t i_nlink;
207 uid_t i_uid;
208 gid_t i_gid;
209 dev_t i_rdev;
210 off_t i_size;
211 time_t i_atime;
212 time_t i_mtime;
213 time_t i_ctime;
214 unsigned long i_blksize;
215 unsigned long i_blocks;
216 unsigned long i_version;
217 struct semaphore i_sem;
218 struct inode_operations * i_op;
219 struct super_block * i_sb;
220 struct wait_queue * i_wait;
221 struct file_lock * i_flock;
222 struct vm_area_struct * i_mmap;
223 struct inode * i_next, * i_prev;
224 struct inode * i_hash_next, * i_hash_prev;
225 struct inode * i_bound_to, * i_bound_by;
226 struct inode * i_mount;
227 struct socket * i_socket;
228 unsigned short i_count;
229 unsigned short i_wcount;
230 unsigned short i_flags;
231 unsigned char i_lock;
232 unsigned char i_dirt;
233 unsigned char i_pipe;
234 unsigned char i_seek;
235 unsigned char i_update;
236 union {
237 struct pipe_inode_info pipe_i;
238 struct minix_inode_info minix_i;
239 struct ext_inode_info ext_i;
240 struct ext2_inode_info ext2_i;
241 struct hpfs_inode_info hpfs_i;
242 struct msdos_inode_info msdos_i;
243 struct umsdos_inode_info umsdos_i;
244 struct iso_inode_info isofs_i;
245 struct nfs_inode_info nfs_i;
246 struct xiafs_inode_info xiafs_i;
247 struct sysv_inode_info sysv_i;
248 void * generic_ip;
249 } u;
250 };
251
252 struct file {
253 mode_t f_mode;
254 loff_t f_pos;
255 unsigned short f_flags;
256 unsigned short f_count;
257 off_t f_reada;
258 struct file *f_next, *f_prev;
259 int f_owner;
260 struct inode * f_inode;
261 struct file_operations * f_op;
262 unsigned long f_version;
263 void *private_data;
264 };
265
266 struct file_lock {
267 struct file_lock *fl_next;
268 struct task_struct *fl_owner;
269 unsigned int fl_fd;
270 struct wait_queue *fl_wait;
271 char fl_type;
272 char fl_whence;
273 off_t fl_start;
274 off_t fl_end;
275 };
276
277 struct fasync_struct {
278 int magic;
279 struct fasync_struct *fa_next;
280 struct file *fa_file;
281 };
282
283 #define FASYNC_MAGIC 0x4601
284
285 #include <linux/minix_fs_sb.h>
286 #include <linux/ext_fs_sb.h>
287 #include <linux/ext2_fs_sb.h>
288 #include <linux/hpfs_fs_sb.h>
289 #include <linux/msdos_fs_sb.h>
290 #include <linux/iso_fs_sb.h>
291 #include <linux/nfs_fs_sb.h>
292 #include <linux/xia_fs_sb.h>
293 #include <linux/sysv_fs_sb.h>
294
295 struct super_block {
296 dev_t s_dev;
297 unsigned long s_blocksize;
298 unsigned char s_blocksize_bits;
299 unsigned char s_lock;
300 unsigned char s_rd_only;
301 unsigned char s_dirt;
302 struct super_operations *s_op;
303 unsigned long s_flags;
304 unsigned long s_magic;
305 unsigned long s_time;
306 struct inode * s_covered;
307 struct inode * s_mounted;
308 struct wait_queue * s_wait;
309 union {
310 struct minix_sb_info minix_sb;
311 struct ext_sb_info ext_sb;
312 struct ext2_sb_info ext2_sb;
313 struct hpfs_sb_info hpfs_sb;
314 struct msdos_sb_info msdos_sb;
315 struct isofs_sb_info isofs_sb;
316 struct nfs_sb_info nfs_sb;
317 struct xiafs_sb_info xiafs_sb;
318 struct sysv_sb_info sysv_sb;
319 void *generic_sbp;
320 } u;
321 };
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 *, char *, int);
327 int (*readdir) (struct inode *, struct file *, struct dirent *, int);
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) (dev_t dev);
336 int (*revalidate) (dev_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 *);
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 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(char *name);
410
411 extern int fs_may_mount(dev_t dev);
412 extern int fs_may_umount(dev_t dev, struct inode * mount_root);
413 extern int fs_may_remount_ro(dev_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);
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(dev_t dev);
456 extern void invalidate_inodes(dev_t dev);
457 extern void invalidate_buffers(dev_t dev);
458 extern int floppy_is_wp(int minor);
459 extern void sync_inodes(dev_t dev);
460 extern void sync_dev(dev_t dev);
461 extern int fsync_dev(dev_t dev);
462 extern void sync_supers(dev_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 void iput(struct inode * inode);
474 extern struct inode * __iget(struct super_block * sb,int nr,int crsmnt);
475 extern struct inode * get_empty_inode(void);
476 extern void insert_inode_hash(struct inode *);
477 extern void clear_inode(struct inode *);
478 extern struct inode * get_pipe_inode(void);
479 extern struct file * get_empty_filp(void);
480 extern struct buffer_head * get_hash_table(dev_t dev, int block, int size);
481 extern struct buffer_head * getblk(dev_t dev, int block, int size);
482 extern void ll_rw_block(int rw, int nr, struct buffer_head * bh[]);
483 extern void ll_rw_page(int rw, int dev, int nr, char * buffer);
484 extern void ll_rw_swap_file(int rw, int dev, unsigned int *b, int nb, char *buffer);
485 extern int is_read_only(int dev);
486 extern void brelse(struct buffer_head * buf);
487 extern void set_blocksize(dev_t dev, int size);
488 extern struct buffer_head * bread(dev_t dev, int block, int size);
489 extern unsigned long bread_page(unsigned long addr,dev_t dev,int b[],int size,int no_share);
490 extern struct buffer_head * breada(dev_t dev,int block, int size,
491 unsigned int pos, unsigned int filesize);
492 extern void put_super(dev_t dev);
493 unsigned long generate_cluster(dev_t dev, int b[], int size);
494 extern dev_t ROOT_DEV;
495
496 extern void show_buffers(void);
497 extern void mount_root(void);
498
499 extern int char_read(struct inode *, struct file *, char *, int);
500 extern int block_read(struct inode *, struct file *, char *, int);
501 extern int read_ahead[];
502
503 extern int char_write(struct inode *, struct file *, char *, int);
504 extern int block_write(struct inode *, struct file *, char *, int);
505
506 extern int generic_mmap(struct inode *, struct file *, struct vm_area_struct *);
507
508 extern int block_fsync(struct inode *, struct file *);
509 extern int file_fsync(struct inode *, struct file *);
510
511 extern void dcache_add(struct inode *, const char *, int, unsigned long);
512 extern int dcache_lookup(struct inode *, const char *, int, unsigned long *);
513
514 extern int inode_change_ok(struct inode *, struct iattr *);
515 extern void inode_setattr(struct inode *, struct iattr *);
516
517 extern inline struct inode * iget(struct super_block * sb,int nr)
518 {
519 return __iget(sb,nr,1);
520 }
521
522 #endif
523
524 #endif