file: convert replace_fd() to FD_PREPARE()

 */

int receive_fd(struct file *file, int __user *ufd, unsigned int o_flags)

{

	int new_fd;

	int error;

	error = security_file_receive(file);

	if (error)

		return error;

	new_fd = get_unused_fd_flags(o_flags);

	if (new_fd < 0)

		return new_fd;

	FD_PREPARE(fdf, o_flags, file);

	if (fdf.err)

		return fdf.err;

	get_file(file);

	if (ufd) {

		error = put_user(new_fd, ufd);

		if (error) {

			put_unused_fd(new_fd);

		error = put_user(fd_prepare_fd(fdf), ufd);

		if (error)

			return error;

	}

	}

	fd_install(new_fd, get_file(file));

	__receive_sock(file);

	return new_fd;

	__receive_sock(fd_prepare_file(fdf));

	return fd_publish(fdf);

}

EXPORT_SYMBOL_GPL(receive_fd);