From: Stephen Hemminger <stephen@networkplumber.org>
Date: Thu, 7 Dec 2017 23:40:20 +0000 (-0800)
Subject: veth: set peer GSO values
X-Git-Tag: v4.9.89~43
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=c3fd4d3c1966b34bad24ecd6629ebe55b865df10;p=platform%2Fkernel%2Flinux-amlogic.git

veth: set peer GSO values


[ Upstream commit 72d24955b44a4039db54a1c252b5031969eeaac3 ]

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>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

diff --git a/drivers/net/veth.c b/drivers/net/veth.c
index fbc853e64531..ee7460ee3d05 100644
--- a/drivers/net/veth.c
+++ b/drivers/net/veth.c
@@ -425,6 +425,9 @@ 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;