netdev - [PATCH net-next 2/2] veth: set peer GSO values

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Message-Id: <20171207234020.18783-3-sthemmin@microsoft.com>
Date:   Thu,  7 Dec 2017 15:40:20 -0800
From:   Stephen Hemminger <stephen@...workplumber.org>
To:     davem@...emloft.net
Cc:     netdev@...r.kernel.org, Stephen Hemminger <sthemmin@...rosoft.com>
Subject: [PATCH net-next 2/2] veth: set peer GSO values

When new veth is created, and GSO values have been configured
on one device, clone those values to the peer.

For example:
   # ip link add dev vm1 gso_max_size 65530 type veth peer name vm2

This should create vm1 <--> vm2 with both having GSO maximum
size set to 65530.

Signed-off-by: Stephen Hemminger <sthemmin@...rosoft.com>
---
 drivers/net/veth.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/net/veth.c b/drivers/net/veth.c
index f5438d0978ca..a69ad39ee57e 100644
--- a/drivers/net/veth.c
+++ b/drivers/net/veth.c
@@ -410,6 +410,9 @@ static int veth_newlink(struct net *src_net, struct net_device *dev,
 	if (ifmp && (dev->ifindex != 0))
 		peer->ifindex = ifmp->ifi_index;
 
+	peer->gso_max_size = dev->gso_max_size;
+	peer->gso_max_segs = dev->gso_max_segs;
+
 	err = register_netdevice(peer);
 	put_net(net);
 	net = NULL;
-- 
2.11.0