original development tree for Linux kernel GTP module; now long in mainline.
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/*
* Wrapper functions for accessing the file_struct fd array.
*/
#ifndef __LINUX_FILE_H
#define __LINUX_FILE_H
#include <linux/compiler.h>
#include <linux/types.h>
#include <linux/posix_types.h>
struct file;
extern void fput(struct file *);
struct file_operations;
struct vfsmount;
struct dentry;
struct path;
extern struct file *alloc_file(struct path *, fmode_t mode,
const struct file_operations *fop);
static inline void fput_light(struct file *file, int fput_needed)
{
if (fput_needed)
fput(file);
}
extern struct file *fget(unsigned int fd);
extern struct file *fget_light(unsigned int fd, int *fput_needed);
extern struct file *fget_raw(unsigned int fd);
extern struct file *fget_raw_light(unsigned int fd, int *fput_needed);
extern int f_dupfd(unsigned int from, struct file *file, unsigned flags);
extern int replace_fd(unsigned fd, struct file *file, unsigned flags);
extern void set_close_on_exec(unsigned int fd, int flag);
extern bool get_close_on_exec(unsigned int fd);
extern void put_filp(struct file *);
extern int get_unused_fd_flags(unsigned flags);
#define get_unused_fd() get_unused_fd_flags(0)
extern void put_unused_fd(unsigned int fd);
extern void fd_install(unsigned int fd, struct file *file);
extern void flush_delayed_fput(void);
extern void __fput_sync(struct file *);
#endif /* __LINUX_FILE_H */