From c3b89fbba339aae533e380839fa078787635356e Mon Sep 17 00:00:00 2001 From: Eric Dumazet Date: Thu, 8 Nov 2012 09:59:52 +0000 Subject: [PATCH] ipip: add GSO support MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit In commit 6b78f16e4b (gre: add GSO support) we added GSO support to GRE tunnels. This patch does the same for IPIP tunnels. Performance of single TCP flow over an IPIP tunnel is increased by 40% Signed-off-by: Eric Dumazet Cc: Maciej Żenczykowski Cc: Tom Herbert Cc: Willem de Bruijn Signed-off-by: David S. Miller --- net/ipv4/ipip.c | 12 ++++++++++++ 1 file changed, 12 insertions(+) diff --git a/net/ipv4/ipip.c b/net/ipv4/ipip.c index e15b45297c09..cc49cc1ff3b9 100644 --- a/net/ipv4/ipip.c +++ b/net/ipv4/ipip.c @@ -479,6 +479,10 @@ static netdev_tx_t ipip_tunnel_xmit(struct sk_buff *skb, struct net_device *dev) if (skb->protocol != htons(ETH_P_IP)) goto tx_error; + if (skb->ip_summed == CHECKSUM_PARTIAL && + skb_checksum_help(skb)) + goto tx_error; + if (tos & 1) tos = old_iph->tos; @@ -773,6 +777,11 @@ static void ipip_dev_free(struct net_device *dev) free_netdev(dev); } +#define IPIP_FEATURES (NETIF_F_SG | \ + NETIF_F_FRAGLIST | \ + NETIF_F_HIGHDMA | \ + NETIF_F_HW_CSUM) + static void ipip_tunnel_setup(struct net_device *dev) { dev->netdev_ops = &ipip_netdev_ops; @@ -787,6 +796,9 @@ static void ipip_tunnel_setup(struct net_device *dev) dev->features |= NETIF_F_NETNS_LOCAL; dev->features |= NETIF_F_LLTX; dev->priv_flags &= ~IFF_XMIT_DST_RELEASE; + + dev->features |= IPIP_FEATURES; + dev->hw_features |= IPIP_FEATURES; } static int ipip_tunnel_init(struct net_device *dev)