netdev - [net-next PATCH 4/5] GRE: Add support for GRO/GSO of IPv6 GRE traffic

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Date:	Thu, 14 Apr 2016 15:33:58 -0400
From:	Alexander Duyck <aduyck@...antis.com>
To:	jesse@...nel.org, netdev@...r.kernel.org, davem@...emloft.net,
	alexander.duyck@...il.com, tom@...bertland.com
Subject: [net-next PATCH 4/5] GRE: Add support for GRO/GSO of IPv6 GRE
 traffic

Since GRE doesn't really care about L3 protocol we can support IPv4 and
IPv6 using the same offloads.  With that being the case we can add a call
to register the offloads for IPv6 as a part of our GRE offload
initialization.

Signed-off-by: Alexander Duyck <aduyck@...antis.com>
---
 net/ipv4/gre_offload.c |   14 +++++++++++++-
 1 file changed, 13 insertions(+), 1 deletion(-)

diff --git a/net/ipv4/gre_offload.c b/net/ipv4/gre_offload.c
index 20557f211408..e88190a8699a 100644
--- a/net/ipv4/gre_offload.c
+++ b/net/ipv4/gre_offload.c
@@ -292,6 +292,18 @@ static const struct net_offload gre_offload = {
 
 static int __init gre_offload_init(void)
 {
-	return inet_add_offload(&gre_offload, IPPROTO_GRE);
+	int err;
+
+	err = inet_add_offload(&gre_offload, IPPROTO_GRE);
+#if IS_ENABLED(CONFIG_IPV6)
+	if (err)
+		return err;
+
+	err = inet6_add_offload(&gre_offload, IPPROTO_GRE);
+	if (err)
+		inet_del_offload(&gre_offload, IPPROTO_GRE);
+#endif
+
+	return err;
 }
 device_initcall(gre_offload_init);