int notify_connection_state_change(struct sk_buff *skb,
				    unsigned int seq,
				    struct drbd_connection_state_change *connection_state_change,
				    enum drbd_notification_type type)
int notify_connection_state_change(struct sk_buff *skb,
				    unsigned int seq,
				    void *state_change,
				    enum drbd_notification_type type)