1 /*
2 * Wrapper functions for accessing the file_struct fd array.
3 */
4
5 #ifndef __LINUX_FILE_H
6 #define __LINUX_FILE_H
7
8 #include <linux/compiler.h>
9 #include <linux/types.h>
10 #include <linux/posix_types.h>
11
12 struct file;
13
14 extern void __fput(struct file *);
15 extern void fput(struct file *);
16 extern void drop_file_write_access(struct file *file);
17
18 struct file_operations;
19 struct vfsmount;
20 struct dentry;
21 extern int init_file(struct file *, struct vfsmount *mnt,
22 struct dentry *dentry, fmode_t mode,
23 const struct file_operations *fop);
24 extern struct file *alloc_file(struct vfsmount *, struct dentry *dentry,
25 fmode_t mode, const struct file_operations *fop);
26
fput_light(struct file * file,int fput_needed)27 static inline void fput_light(struct file *file, int fput_needed)
28 {
29 if (unlikely(fput_needed))
30 fput(file);
31 }
32
33 extern struct file *fget(unsigned int fd);
34 extern struct file *fget_light(unsigned int fd, int *fput_needed);
35 extern void set_close_on_exec(unsigned int fd, int flag);
36 extern void put_filp(struct file *);
37 extern int alloc_fd(unsigned start, unsigned flags);
38 extern int get_unused_fd(void);
39 #define get_unused_fd_flags(flags) alloc_fd(0, (flags))
40 extern void put_unused_fd(unsigned int fd);
41
42 extern void fd_install(unsigned int fd, struct file *file);
43
44 #endif /* __LINUX_FILE_H */
45