security_file_fcntl
err = security_file_fcntl(fd_file(f), cmd, arg);
err = security_file_fcntl(fd_file(f), cmd, arg);
err = security_file_fcntl(fd_file(f), cmd, arg);
err = security_file_fcntl(fd_file(f), cmd, arg);
err = security_file_fcntl(fd_file(f), cmd, arg);
int security_file_fcntl(struct file *file, unsigned int cmd, unsigned long arg);