Commit 1eaa8178 authored by Pravin B Shelar's avatar Pravin B Shelar Committed by David S. Miller
Browse files

vxlan: Add tx-vlan offload support. 



Following patch allows transmit side vlan offload for vxlan
devices.

Signed-off-by: default avatarPravin B Shelar <pshelar@nicira.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 649c5b8b

drivers/net/vxlan.c

+15 −1
Original line number Diff line number Diff line
@@ -27,6 +27,7 @@ 
#include <linux/igmp.h>

#include <linux/etherdevice.h>

#include <linux/if_ether.h>

#include <linux/if_vlan.h>

#include <linux/hash.h>

#include <linux/ethtool.h>

#include <net/arp.h>
@@ -1139,13 +1140,23 @@ int vxlan_xmit_skb(struct net *net, struct vxlan_sock *vs, 
	}



	min_headroom = LL_RESERVED_SPACE(rt->dst.dev) + rt->dst.header_len

			+ VXLAN_HLEN + sizeof(struct iphdr);

			+ VXLAN_HLEN + sizeof(struct iphdr)

			+ (vlan_tx_tag_present(skb) ? VLAN_HLEN : 0);



	/* Need space for new headers (invalidates iph ptr) */

	err = skb_cow_head(skb, min_headroom);

	if (unlikely(err))

		return err;



	if (vlan_tx_tag_present(skb)) {

		if (WARN_ON(!__vlan_put_tag(skb,

					    skb->vlan_proto,

					    vlan_tx_tag_get(skb))))

			return -ENOMEM;



		skb->vlan_tci = 0;

	}



	vxh = (struct vxlanhdr *) __skb_push(skb, sizeof(*vxh));

	vxh->vx_flags = htonl(VXLAN_FLAGS);

	vxh->vx_vni = vni;
@@ -1560,8 +1571,11 @@ static void vxlan_setup(struct net_device *dev) 
	dev->features   |= NETIF_F_RXCSUM;

	dev->features   |= NETIF_F_GSO_SOFTWARE;



	dev->vlan_features = dev->features;

	dev->features |= NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_STAG_TX;

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

	dev->hw_features |= NETIF_F_GSO_SOFTWARE;

	dev->hw_features |= NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_STAG_TX;

	dev->priv_flags	&= ~IFF_XMIT_DST_RELEASE;

	dev->priv_flags |= IFF_LIVE_ADDR_CHANGE;