From 72d24955b44a4039db54a1c252b5031969eeaac3 Mon Sep 17 00:00:00 2001
From: Stephen Hemminger <stephen@networkplumber.org>
Date: Thu, 7 Dec 2017 15:40:20 -0800
Subject: [PATCH] veth: set peer GSO values
Git-commit: 72d24955b44a4039db54a1c252b5031969eeaac3
Patch-mainline: v4.16-rc1
References: bsc#1051510
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@microsoft.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Acked-by: Takashi Iwai <tiwai@suse.de>
---
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;
--
2.16.4