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vxlan: Add capability of Rx checksum offload for inner packet

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This patch adds capability in vxlan to identify received
checksummed inner packets and signal them to the upper layers of
the stack. The driver needs to set the skb->encapsulation bit
and also set the skb->ip_summed to CHECKSUM_UNNECESSARY.

Signed-off-by: Joseph Gasparakis <joseph.gasparakis@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Joseph Gasparakis 2012-12-07 14:14:18 +00:00 committed by David S. Miller
parent d6727fe385
commit 0afb1666fe
1 changed files with 14 additions and 2 deletions
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16
drivers/net/vxlan.c
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@ -607,7 +607,17 @@ static int vxlan_udp_encap_recv(struct sock *sk, struct sk_buff *skb)
__skb_tunnel_rx(skb, vxlan->dev);
skb_reset_network_header(skb);
skb->ip_summed = CHECKSUM_NONE;
/* If the NIC driver gave us an encapsulated packet with
* CHECKSUM_UNNECESSARY and Rx checksum feature is enabled,
* leave the CHECKSUM_UNNECESSARY, the device checksummed it
* for us. Otherwise force the upper layers to verify it.
*/
if (skb->ip_summed != CHECKSUM_UNNECESSARY || !skb->encapsulation ||
!(vxlan->dev->features & NETIF_F_RXCSUM))
skb->ip_summed = CHECKSUM_NONE;
skb->encapsulation = 0;
err = IP_ECN_decapsulate(oip, skb);
if (unlikely(err)) {
@ -1175,7 +1185,9 @@ static void vxlan_setup(struct net_device *dev)
dev->features |= NETIF_F_LLTX;
dev->features |= NETIF_F_NETNS_LOCAL;
dev->features |= NETIF_F_SG | NETIF_F_HW_CSUM;
dev->hw_features |= NETIF_F_SG | NETIF_F_HW_CSUM;
dev->features |= NETIF_F_RXCSUM;
dev->hw_features |= NETIF_F_SG | NETIF_F_HW_CSUM | NETIF_F_RXCSUM;
dev->priv_flags &= ~IFF_XMIT_DST_RELEASE;
spin_lock_init(&vxlan->hash_lock);