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authorAlexander Duyck <alexander.h.duyck@redhat.com>2014-11-21 19:37:09 -0800
committerDavid S. Miller <davem@davemloft.net>2014-11-23 14:18:11 -0500
commitb6fef4c6b8c1994ffe050dcdb9391427bf0d9882 (patch)
tree92e0ba56c25df29fbcf36c48410e20f8bc76a5ec /net
parent8a84e01e147f44111988f9d8ccd2eaa30215a0f2 (diff)
downloadlinux-b6fef4c6b8c1994ffe050dcdb9391427bf0d9882.tar.bz2
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@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net')
-rw-r--r--net/ipv6/ip6_offload.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/net/ipv6/ip6_offload.c b/net/ipv6/ip6_offload.c
index a071563a7e6e..01e12d0d8fcc 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 |