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Commit 05c0db08 authored by Pravin B Shelar's avatar Pravin B Shelar Committed by David S. Miller
Browse files

VXLAN: Use UDP Tunnel segmention. 



Enable TSO for VXLAN devices and use UDP_TUNNEL to offload vxlan
segmentation.

Signed-off-by: default avatarPravin B Shelar <pshelar@nicira.com>
Acked-by: default avatarStephen Hemminger <stephen@networkplumber.org>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 73136267

drivers/net/vxlan.c

+18 −3
Original line number Diff line number Diff line
@@ -820,6 +820,20 @@ static u16 vxlan_src_port(const struct vxlan_dev *vxlan, struct sk_buff *skb) 
	return (((u64) hash * range) >> 32) + vxlan->port_min;

}



static int handle_offloads(struct sk_buff *skb)

{

	if (skb_is_gso(skb)) {

		int err = skb_unclone(skb, GFP_ATOMIC);

		if (unlikely(err))

			return err;



		skb_shinfo(skb)->gso_type |= (SKB_GSO_UDP_TUNNEL | SKB_GSO_UDP);

	} else if (skb->ip_summed != CHECKSUM_PARTIAL)

		skb->ip_summed = CHECKSUM_NONE;



	return 0;

}



/* Transmit local packets over Vxlan

 *

 * Outer IP header inherits ECN and DF from inner header.
@@ -963,9 +977,8 @@ static netdev_tx_t vxlan_xmit(struct sk_buff *skb, struct net_device *dev) 


	vxlan_set_owner(dev, skb);



	/* See iptunnel_xmit() */

	if (skb->ip_summed != CHECKSUM_PARTIAL)

		skb->ip_summed = CHECKSUM_NONE;

	if (handle_offloads(skb))

		goto drop;



	err = ip_local_out(skb);

	if (likely(net_xmit_eval(err) == 0)) {
@@ -1187,8 +1200,10 @@ static void vxlan_setup(struct net_device *dev) 
	dev->features	|= NETIF_F_NETNS_LOCAL;

	dev->features	|= NETIF_F_SG | NETIF_F_HW_CSUM;

	dev->features   |= NETIF_F_RXCSUM;

	dev->features   |= NETIF_F_GSO_SOFTWARE;



	dev->hw_features |= NETIF_F_SG | NETIF_F_HW_CSUM | NETIF_F_RXCSUM;

	dev->hw_features |= NETIF_F_GSO_SOFTWARE;

	dev->priv_flags	&= ~IFF_XMIT_DST_RELEASE;

	dev->priv_flags |= IFF_LIVE_ADDR_CHANGE;