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[mirror_ubuntu-bionic-kernel.git] / include / linux / file.h
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 drop_file_write_access(struct file *file);
16
17 struct file_operations;
18 struct vfsmount;
19 struct dentry;
20 struct path;
21 extern struct file *alloc_file(struct path *, fmode_t mode,
22 const struct file_operations *fop);
23
24 static inline void fput_light(struct file *file, int fput_needed)
25 {
26 if (fput_needed)
27 fput(file);
28 }
29
30 extern struct file *fget(unsigned int fd);
31 extern struct file *fget_light(unsigned int fd, int *fput_needed);
32 extern void set_close_on_exec(unsigned int fd, int flag);
33 extern void put_filp(struct file *);
34 extern int alloc_fd(unsigned start, unsigned flags);
35 extern int get_unused_fd(void);
36 #define get_unused_fd_flags(flags) alloc_fd(0, (flags))
37 extern void put_unused_fd(unsigned int fd);
38
39 extern void fd_install(unsigned int fd, struct file *file);
40
41 #endif /* __LINUX_FILE_H */