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vxlan: Add capability of Rx checksum offload for inner packet 

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
View File

@ -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);