4.15-stable review patch. If anyone has any objections, please let me know.
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From: Stephen Hemminger stephen@networkplumber.org
[ 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 --- drivers/net/veth.c | 3 +++ 1 file changed, 3 insertions(+)
--- a/drivers/net/veth.c +++ b/drivers/net/veth.c @@ -410,6 +410,9 @@ static int veth_newlink(struct net *src_ 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;