From: Joseph Gasparakis Date: Fri, 7 Dec 2012 14:14:18 +0000 (+0000) Subject: vxlan: Add capability of Rx checksum offload for inner packet X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=0afb166;p=openwrt%2Fstaging%2Fblogic.git 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 Signed-off-by: David S. Miller --- diff --git a/drivers/net/vxlan.c b/drivers/net/vxlan.c index 88b31f2453dd..3b3fdf648ea7 100644 --- a/drivers/net/vxlan.c +++ b/drivers/net/vxlan.c @@ -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);