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authorPravin B Shelar <pshelar@nicira.com>2013-02-14 15:02:41 +0100
committerDavid S. Miller <davem@davemloft.net>2013-02-15 21:17:11 +0100
commit68c331631143f5f039baac99a650e0b9e1ea02b6 (patch)
treec69d73c5599aab5e92a8c99bc5343c9fc9ffbbd8 /net/ipv4/tcp.c
parentnet: factor out skb_mac_gso_segment() from skb_gso_segment() (diff)
downloadlinux-68c331631143f5f039baac99a650e0b9e1ea02b6.tar.xz
linux-68c331631143f5f039baac99a650e0b9e1ea02b6.zip
v4 GRE: Add TCP segmentation offload for GRE
Following patch adds GRE protocol offload handler so that skb_gso_segment() can segment GRE packets. SKB GSO CB is added to keep track of total header length so that skb_segment can push entire header. e.g. in case of GRE, skb_segment need to push inner and outer headers to every segment. New NETIF_F_GRE_GSO feature is added for devices which support HW GRE TSO offload. Currently none of devices support it therefore GRE GSO always fall backs to software GSO. [ Compute pkt_len before ip_local_out() invocation. -DaveM ] Signed-off-by: Pravin B Shelar <pshelar@nicira.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv4/tcp.c')
-rw-r--r--net/ipv4/tcp.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/net/ipv4/tcp.c b/net/ipv4/tcp.c
index 1f0bedb8622f..7a5ba48c2cc9 100644
--- a/net/ipv4/tcp.c
+++ b/net/ipv4/tcp.c
@@ -3043,6 +3043,7 @@ struct sk_buff *tcp_tso_segment(struct sk_buff *skb,
SKB_GSO_DODGY |
SKB_GSO_TCP_ECN |
SKB_GSO_TCPV6 |
+ SKB_GSO_GRE |
0) ||
!(type & (SKB_GSO_TCPV4 | SKB_GSO_TCPV6))))
goto out;