[PATCH 4/4] batman-adv: BATMAN_V: aggregate OGMv2 packets
From: Simon Wunderlich <sw@simonwunderlich.de>
Date: 2019-08-08 13:15:26
Also in:
batman
Subsystem:
batman advanced, the rest · Maintainers:
Marek Lindner, Simon Wunderlich, Antonio Quartulli, Sven Eckelmann, Linus Torvalds
From: Linus Lüssing <redacted> Instead of transmitting individual OGMv2 packets from the aggregation queue merge those OGMv2 packets into a single one and transmit this aggregate instead. This reduces overhead as it saves an ethernet header and a transmission per aggregated OGMv2 packet. Signed-off-by: Linus Lüssing <redacted> Signed-off-by: Sven Eckelmann <sven@narfation.org> Signed-off-by: Simon Wunderlich <sw@simonwunderlich.de> --- net/batman-adv/bat_v_ogm.c | 28 +++++++++++++++++++++++++++- 1 file changed, 27 insertions(+), 1 deletion(-)
diff --git a/net/batman-adv/bat_v_ogm.c b/net/batman-adv/bat_v_ogm.c
index 52c990b54de5..319249f0f85f 100644
--- a/net/batman-adv/bat_v_ogm.c
+++ b/net/batman-adv/bat_v_ogm.c@@ -191,18 +191,44 @@ static void batadv_v_ogm_aggr_list_free(struct batadv_hard_iface *hard_iface) * 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); } /**
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2.20.1