batman-adv: BATMAN_V: aggregate OGMv2 packets

 * batadv_v_ogm_aggr_send() - flush & send aggregation queue

 * @hard_iface: the interface with the aggregation queue to flush

 *

 * Aggregates all OGMv2 packets currently in the aggregation queue into a

 * single OGMv2 packet and transmits this aggregate.

 *

 * The aggregation queue is empty after this call.

 *

 * Caller needs to hold the hard_iface->bat_v.aggr_list_lock.

 */

static void batadv_v_ogm_aggr_send(struct batadv_hard_iface *hard_iface)

{

	unsigned int aggr_len = hard_iface->bat_v.aggr_len;

	struct sk_buff *skb_aggr;

	unsigned int ogm_len;

	struct sk_buff *skb;

	lockdep_assert_held(&hard_iface->bat_v.aggr_list_lock);

	if (!aggr_len)

		return;

	skb_aggr = dev_alloc_skb(aggr_len + ETH_HLEN + NET_IP_ALIGN);

	if (!skb_aggr) {

		batadv_v_ogm_aggr_list_free(hard_iface);

		return;

	}

	skb_reserve(skb_aggr, ETH_HLEN + NET_IP_ALIGN);

	skb_reset_network_header(skb_aggr);

	while ((skb = skb_dequeue(&hard_iface->bat_v.aggr_list))) {

		hard_iface->bat_v.aggr_len -= batadv_v_ogm_len(skb);

		batadv_v_ogm_send_to_if(skb, hard_iface);

		ogm_len = batadv_v_ogm_len(skb);

		skb_put_data(skb_aggr, skb->data, ogm_len);

		consume_skb(skb);

	}

	batadv_v_ogm_send_to_if(skb_aggr, hard_iface);

}

/**