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 #define BLKRAGET 4707
109
110
111
112 #define SCSI_IOCTL_GET_IDLUN 0x5382
113
114
115
116 #define SCSI_IOCTL_TAGGED_ENABLE 0x5383
117 #define SCSI_IOCTL_TAGGED_DISABLE 0x5384
118
119
120 #define BMAP_IOCTL 1
121 #define FIBMAP 1
122 #define FIGETBSZ 2
123
124
125
126 #define NOTIFY_SIZE 1
127 #define NOTIFY_MODE 2
128 #define NOTIFY_TIME 4
129 #define NOTIFY_UIDGID 8
130
131 typedef char buffer_block[BLOCK_SIZE];
132
133 struct buffer_head {
134 char * b_data;
135 unsigned long b_size;
136 unsigned long b_blocknr;
137 dev_t b_dev;
138 unsigned short b_count;
139 unsigned char b_uptodate;
140 unsigned char b_dirt;
141 unsigned char b_lock;
142 unsigned char b_req;
143 unsigned char b_list;
144 unsigned char b_retain;
145
146 unsigned long b_flushtime;
147 unsigned long b_lru_time;
148 struct wait_queue * b_wait;
149 struct buffer_head * b_prev;
150 struct buffer_head * b_next;
151 struct buffer_head * b_prev_free;
152 struct buffer_head * b_next_free;
153 struct buffer_head * b_this_page;
154 struct buffer_head * b_reqnext;
155 };
156
157 #include <linux/pipe_fs_i.h>
158 #include <linux/minix_fs_i.h>
159 #include <linux/ext_fs_i.h>
160 #include <linux/ext2_fs_i.h>
161 #include <linux/hpfs_fs_i.h>
162 #include <linux/msdos_fs_i.h>
163 #include <linux/umsdos_fs_i.h>
164 #include <linux/iso_fs_i.h>
165 #include <linux/nfs_fs_i.h>
166 #include <linux/xia_fs_i.h>
167 #include <linux/sysv_fs_i.h>
168
169 #ifdef __KERNEL__
170
171 struct inode {
172 dev_t i_dev;
173 unsigned long i_ino;
174 umode_t i_mode;
175 nlink_t i_nlink;
176 uid_t i_uid;
177 gid_t i_gid;
178 dev_t i_rdev;
179 off_t i_size;
180 time_t i_atime;
181 time_t i_mtime;
182 time_t i_ctime;
183 unsigned long i_blksize;
184 unsigned long i_blocks;
185 unsigned long i_version;
186 struct semaphore i_sem;
187 struct inode_operations * i_op;
188 struct super_block * i_sb;
189 struct wait_queue * i_wait;
190 struct file_lock * i_flock;
191 struct vm_area_struct * i_mmap;
192 struct inode * i_next, * i_prev;
193 struct inode * i_hash_next, * i_hash_prev;
194 struct inode * i_bound_to, * i_bound_by;
195 struct inode * i_mount;
196 struct socket * i_socket;
197 unsigned short i_count;
198 unsigned short i_flags;
199 unsigned char i_lock;
200 unsigned char i_dirt;
201 unsigned char i_pipe;
202 unsigned char i_seek;
203 unsigned char i_update;
204 union {
205 struct pipe_inode_info pipe_i;
206 struct minix_inode_info minix_i;
207 struct ext_inode_info ext_i;
208 struct ext2_inode_info ext2_i;
209 struct hpfs_inode_info hpfs_i;
210 struct msdos_inode_info msdos_i;
211 struct umsdos_inode_info umsdos_i;
212 struct iso_inode_info isofs_i;
213 struct nfs_inode_info nfs_i;
214 struct xiafs_inode_info xiafs_i;
215 struct sysv_inode_info sysv_i;
216 void * generic_ip;
217 } u;
218 };
219
220 struct file {
221 mode_t f_mode;
222 off_t f_pos;
223 unsigned short f_flags;
224 unsigned short f_count;
225 off_t f_reada;
226 struct file *f_next, *f_prev;
227 int f_owner;
228 struct inode * f_inode;
229 struct file_operations * f_op;
230 void *private_data;
231 };
232
233 struct file_lock {
234 struct file_lock *fl_next;
235 struct task_struct *fl_owner;
236 unsigned int fl_fd;
237 struct wait_queue *fl_wait;
238 char fl_type;
239 char fl_whence;
240 off_t fl_start;
241 off_t fl_end;
242 };
243
244 struct fasync_struct {
245 int magic;
246 struct fasync_struct *fa_next;
247 struct file *fa_file;
248 };
249
250 #define FASYNC_MAGIC 0x4601
251
252 #include <linux/minix_fs_sb.h>
253 #include <linux/ext_fs_sb.h>
254 #include <linux/ext2_fs_sb.h>
255 #include <linux/hpfs_fs_sb.h>
256 #include <linux/msdos_fs_sb.h>
257 #include <linux/iso_fs_sb.h>
258 #include <linux/nfs_fs_sb.h>
259 #include <linux/xia_fs_sb.h>
260 #include <linux/sysv_fs_sb.h>
261
262 struct super_block {
263 dev_t s_dev;
264 unsigned long s_blocksize;
265 unsigned char s_blocksize_bits;
266 unsigned char s_lock;
267 unsigned char s_rd_only;
268 unsigned char s_dirt;
269 struct super_operations *s_op;
270 unsigned long s_flags;
271 unsigned long s_magic;
272 unsigned long s_time;
273 struct inode * s_covered;
274 struct inode * s_mounted;
275 struct wait_queue * s_wait;
276 union {
277 struct minix_sb_info minix_sb;
278 struct ext_sb_info ext_sb;
279 struct ext2_sb_info ext2_sb;
280 struct hpfs_sb_info hpfs_sb;
281 struct msdos_sb_info msdos_sb;
282 struct isofs_sb_info isofs_sb;
283 struct nfs_sb_info nfs_sb;
284 struct xiafs_sb_info xiafs_sb;
285 struct sysv_sb_info sysv_sb;
286 void *generic_sbp;
287 } u;
288 };
289
290 struct file_operations {
291 int (*lseek) (struct inode *, struct file *, off_t, int);
292 int (*read) (struct inode *, struct file *, char *, int);
293 int (*write) (struct inode *, struct file *, char *, int);
294 int (*readdir) (struct inode *, struct file *, struct dirent *, int);
295 int (*select) (struct inode *, struct file *, int, select_table *);
296 int (*ioctl) (struct inode *, struct file *, unsigned int, unsigned long);
297 int (*mmap) (struct inode *, struct file *, struct vm_area_struct *);
298 int (*open) (struct inode *, struct file *);
299 void (*release) (struct inode *, struct file *);
300 int (*fsync) (struct inode *, struct file *);
301 int (*fasync) (struct inode *, struct file *, int);
302 int (*check_media_change) (dev_t dev);
303 int (*revalidate) (dev_t dev);
304 };
305
306 struct inode_operations {
307 struct file_operations * default_file_ops;
308 int (*create) (struct inode *,const char *,int,int,struct inode **);
309 int (*lookup) (struct inode *,const char *,int,struct inode **);
310 int (*link) (struct inode *,struct inode *,const char *,int);
311 int (*unlink) (struct inode *,const char *,int);
312 int (*symlink) (struct inode *,const char *,int,const char *);
313 int (*mkdir) (struct inode *,const char *,int,int);
314 int (*rmdir) (struct inode *,const char *,int);
315 int (*mknod) (struct inode *,const char *,int,int,int);
316 int (*rename) (struct inode *,const char *,int,struct inode *,const char *,int);
317 int (*readlink) (struct inode *,char *,int);
318 int (*follow_link) (struct inode *,struct inode *,int,int,struct inode **);
319 int (*bmap) (struct inode *,int);
320 void (*truncate) (struct inode *);
321 int (*permission) (struct inode *, int);
322 int (*smap) (struct inode *,int);
323 };
324
325 struct super_operations {
326 void (*read_inode) (struct inode *);
327 int (*notify_change) (int flags, struct inode *);
328 void (*write_inode) (struct inode *);
329 void (*put_inode) (struct inode *);
330 void (*put_super) (struct super_block *);
331 void (*write_super) (struct super_block *);
332 void (*statfs) (struct super_block *, struct statfs *);
333 int (*remount_fs) (struct super_block *, int *, char *);
334 };
335
336 struct file_system_type {
337 struct super_block *(*read_super) (struct super_block *, void *, int);
338 char *name;
339 int requires_dev;
340 struct file_system_type * next;
341 };
342
343 extern int register_filesystem(struct file_system_type *);
344 extern int unregister_filesystem(struct file_system_type *);
345
346 asmlinkage int sys_open(const char *, int, int);
347 asmlinkage int sys_close(unsigned int);
348
349 extern void kill_fasync(struct fasync_struct *fa, int sig);
350
351 extern int getname(const char * filename, char **result);
352 extern void putname(char * name);
353
354 extern int register_blkdev(unsigned int, const char *, struct file_operations *);
355 extern int unregister_blkdev(unsigned int major, const char * name);
356 extern int blkdev_open(struct inode * inode, struct file * filp);
357 extern struct file_operations def_blk_fops;
358 extern struct inode_operations blkdev_inode_operations;
359
360 extern int register_chrdev(unsigned int, const char *, struct file_operations *);
361 extern int unregister_chrdev(unsigned int major, const char * name);
362 extern int chrdev_open(struct inode * inode, struct file * filp);
363 extern struct file_operations def_chr_fops;
364 extern struct inode_operations chrdev_inode_operations;
365
366 extern void init_fifo(struct inode * inode);
367
368 extern struct file_operations connecting_fifo_fops;
369 extern struct file_operations read_fifo_fops;
370 extern struct file_operations write_fifo_fops;
371 extern struct file_operations rdwr_fifo_fops;
372 extern struct file_operations read_pipe_fops;
373 extern struct file_operations write_pipe_fops;
374 extern struct file_operations rdwr_pipe_fops;
375
376 extern struct file_system_type *get_fs_type(char *name);
377
378 extern int fs_may_mount(dev_t dev);
379 extern int fs_may_umount(dev_t dev, struct inode * mount_root);
380 extern int fs_may_remount_ro(dev_t dev);
381
382 extern struct file *first_file;
383 extern int nr_files;
384 extern struct super_block super_blocks[NR_SUPER];
385
386 extern int shrink_buffers(unsigned int priority);
387 extern void refile_buffer(struct buffer_head * buf);
388 extern void set_writetime(struct buffer_head * buf, int flag);
389 extern void refill_freelist(int size);
390
391 extern struct buffer_head ** buffer_pages;
392 extern int nr_buffers;
393 extern int buffermem;
394 extern int nr_buffer_heads;
395
396 #define BUF_CLEAN 0
397 #define BUF_UNSHARED 1
398 #define BUF_LOCKED 2
399 #define BUF_LOCKED1 3
400 #define BUF_DIRTY 4
401 #define BUF_SHARED 5
402 #define NR_LIST 6
403
404 extern inline void mark_buffer_clean(struct buffer_head * bh)
405 {
406 if(bh->b_dirt) {
407 bh->b_dirt = 0;
408 if(bh->b_list == BUF_DIRTY) refile_buffer(bh);
409 }
410 }
411
412 extern inline void mark_buffer_dirty(struct buffer_head * bh, int flag)
413 {
414 if(!bh->b_dirt) {
415 bh->b_dirt = 1;
416 set_writetime(bh, flag);
417 if(bh->b_list != BUF_DIRTY) refile_buffer(bh);
418 }
419 }
420
421
422 extern int check_disk_change(dev_t dev);
423 extern void invalidate_inodes(dev_t dev);
424 extern void invalidate_buffers(dev_t dev);
425 extern int floppy_is_wp(int minor);
426 extern void sync_inodes(dev_t dev);
427 extern void sync_dev(dev_t dev);
428 extern int fsync_dev(dev_t dev);
429 extern void sync_supers(dev_t dev);
430 extern int bmap(struct inode * inode,int block);
431 extern int notify_change(int flags, struct inode * inode);
432 extern int namei(const char * pathname, struct inode ** res_inode);
433 extern int lnamei(const char * pathname, struct inode ** res_inode);
434 extern int permission(struct inode * inode,int mask);
435 extern int open_namei(const char * pathname, int flag, int mode,
436 struct inode ** res_inode, struct inode * base);
437 extern int do_mknod(const char * filename, int mode, dev_t dev);
438 extern void iput(struct inode * inode);
439 extern struct inode * __iget(struct super_block * sb,int nr,int crsmnt);
440 extern struct inode * get_empty_inode(void);
441 extern void insert_inode_hash(struct inode *);
442 extern void clear_inode(struct inode *);
443 extern struct inode * get_pipe_inode(void);
444 extern struct file * get_empty_filp(void);
445 extern struct buffer_head * get_hash_table(dev_t dev, int block, int size);
446 extern struct buffer_head * getblk(dev_t dev, int block, int size);
447 extern void ll_rw_block(int rw, int nr, struct buffer_head * bh[]);
448 extern void ll_rw_page(int rw, int dev, int nr, char * buffer);
449 extern void ll_rw_swap_file(int rw, int dev, unsigned int *b, int nb, char *buffer);
450 extern int is_read_only(int dev);
451 extern void brelse(struct buffer_head * buf);
452 extern void set_blocksize(dev_t dev, int size);
453 extern struct buffer_head * bread(dev_t dev, int block, int size);
454 extern unsigned long bread_page(unsigned long addr,dev_t dev,int b[],int size,int no_share);
455 extern struct buffer_head * breada(dev_t dev,int block, int size,
456 unsigned int pos, unsigned int filesize);
457 extern void put_super(dev_t dev);
458 unsigned long generate_cluster(dev_t dev, int b[], int size);
459 extern dev_t ROOT_DEV;
460
461 extern void show_buffers(void);
462 extern void mount_root(void);
463
464 extern int char_read(struct inode *, struct file *, char *, int);
465 extern int block_read(struct inode *, struct file *, char *, int);
466 extern int read_ahead[];
467
468 extern int char_write(struct inode *, struct file *, char *, int);
469 extern int block_write(struct inode *, struct file *, char *, int);
470
471 extern int generic_mmap(struct inode *, struct file *, struct vm_area_struct *);
472
473 extern int block_fsync(struct inode *, struct file *);
474 extern int file_fsync(struct inode *, struct file *);
475
476 extern void dcache_add(struct inode *, const char *, int, unsigned long);
477 extern int dcache_lookup(struct inode *, const char *, int, unsigned long *);
478
479 extern inline struct inode * iget(struct super_block * sb,int nr)
480 {
481 return __iget(sb,nr,1);
482 }
483
484 #endif
485
486 #endif