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Date: Fri, 21 Nov 2014 19:37:09 -0800 From: Alexander Duyck <alexander.h.duyck@...hat.com> To: netdev@...r.kernel.org Cc: davem@...emloft.net Subject: [net PATCH] ipv6: Do not treat a GSO_TCPV4 request from UDP tunnel over IPv6 as invalid This patch adds SKB_GSO_TCPV4 to the list of supported GSO types handled by the IPv6 GSO offloads. Without this change VXLAN tunnels running over IPv6 do not currently handle IPv4 TCP TSO requests correctly and end up handing the non-segmented frame off to the device. Below is the before and after for a simple netperf TCP_STREAM test between two endpoints tunneling IPv4 over a VXLAN tunnel running on IPv6 on top of a 1Gb/s network adapter. Recv Send Send Socket Socket Message Elapsed Size Size Size Time Throughput bytes bytes bytes secs. 10^6bits/sec 87380 16384 16384 10.29 0.88 Before 87380 16384 16384 10.03 895.69 After Signed-off-by: Alexander Duyck <alexander.h.duyck@...hat.com> --- net/ipv6/ip6_offload.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/net/ipv6/ip6_offload.c b/net/ipv6/ip6_offload.c index a071563..01e12d0 100644 --- a/net/ipv6/ip6_offload.c +++ b/net/ipv6/ip6_offload.c @@ -69,7 +69,8 @@ static struct sk_buff *ipv6_gso_segment(struct sk_buff *skb, int nhoff; if (unlikely(skb_shinfo(skb)->gso_type & - ~(SKB_GSO_UDP | + ~(SKB_GSO_TCPV4 | + SKB_GSO_UDP | SKB_GSO_DODGY | SKB_GSO_TCP_ECN | SKB_GSO_GRE | -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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