linux-kernel - [PATCH 4.4 005/342] lwt: fix rx checksum setting for lwt devices tunneling over ipv6

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Date:	Tue, 01 Mar 2016 23:53:54 +0000
From:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:	<linux-kernel@...r.kernel.org>
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	<stable@...r.kernel.org>, Paolo Abeni <pabeni@...hat.com>,
	Jiri Benc <jbenc@...hat.com>, Jesse Gross <jesse@...nel.org>,
	"David S. Miller" <davem@...emloft.net>
Subject: [PATCH 4.4 005/342] lwt: fix rx checksum setting for lwt devices tunneling over ipv6

4.4-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Paolo Abeni <pabeni@...hat.com>

[ Upstream commit c868ee7063bdb53f3ef9eac7bcec84960980b471 ]

the commit 35e2d1152b22 ("tunnels: Allow IPv6 UDP checksums to be
correctly controlled.") changed the default xmit checksum setting
for lwt vxlan/geneve ipv6 tunnels, so that now the checksum is not
set into external UDP header.
This commit changes the rx checksum setting for both lwt vxlan/geneve
devices created by openvswitch accordingly, so that lwt over ipv6
tunnel pairs are again able to communicate with default values.

Signed-off-by: Paolo Abeni <pabeni@...hat.com>
Acked-by: Jiri Benc <jbenc@...hat.com>
Acked-by: Jesse Gross <jesse@...nel.org>
Signed-off-by: David S. Miller <davem@...emloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 net/openvswitch/vport-vxlan.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/net/openvswitch/vport-vxlan.c
+++ b/net/openvswitch/vport-vxlan.c
@@ -90,7 +90,7 @@ static struct vport *vxlan_tnl_create(co
 	int err;
 	struct vxlan_config conf = {
 		.no_share = true,
-		.flags = VXLAN_F_COLLECT_METADATA,
+		.flags = VXLAN_F_COLLECT_METADATA | VXLAN_F_UDP_ZERO_CSUM6_RX,
 	};
 
 	if (!options) {