From patchwork Fri Dec 7 02:05:53 2012 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Subject: vxlan: Add capability of Rx checksum offload for inner packet Date: Thu, 06 Dec 2012 16:05:53 -0000 From: Joseph Gasparakis X-Patchwork-Id: 204378 Message-Id: <1354845953-23424-1-git-send-email-joseph.gasparakis@intel.com> To: davem@davemloft.net, shemminger@vyatta.com, chrisw@sous-sol.org, gospo@redhat.com Cc: Joseph Gasparakis , netdev@vger.kernel.org, linux-kernel@vger.kernel.org, alexander.h.duyck@intel.com, peter.p.waskiewicz.jr@intel.com 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 --- drivers/net/vxlan.c | 11 +++++++++-- 1 files changed, 9 insertions(+), 2 deletions(-) diff --git a/drivers/net/vxlan.c b/drivers/net/vxlan.c index 88b31f2..cf0231d 100644 --- a/drivers/net/vxlan.c +++ b/drivers/net/vxlan.c @@ -607,7 +607,12 @@ 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 (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 +1180,9 @@ 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);