soo_ioctl
.fo_ioctl = soo_ioctl,
error = soo_ioctl(&filetmp, ap->a_command, ap->a_data, ap->a_p);
error = soo_ioctl(&filetmp, ap->a_command, ap->a_data, ap->a_p);
int soo_ioctl(struct file *, u_long, caddr_t, struct proc *);