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VXLAN: Use UDP Tunnel segmention. 

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

Signed-off-by: Pravin B Shelar <pshelar@nicira.com>
Acked-by: Stephen Hemminger <stephen@networkplumber.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Pravin B Shelar 2013-03-07 13:22:36 +00:00 committed by David S. Miller
parent 7313626745
commit 05c0db08ab
1 changed files with 18 additions and 3 deletions
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21
drivers/net/vxlan.c
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@ -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;