Commit 3763e7ef authored May 13, 2014 by dingtianhong Committed by David S. Miller May 14, 2014

macvlan: Propagate lowerdev MTU changes



When the physical MTU changes we should ensure that all existing MACVLAN
dev MTU do not exceed the new lowerdev MTU. This patch adds that
propagation.

Signed-off-by: Ding Tianhong <dingtianhong@huawei.com>
Reviewed-by: Jiri Pirko <jiri@resnulli.us>
Signed-off-by: David S. Miller <davem@davemloft.net>

parent 8ba7e7bf

drivers/net/macvlan.c

+7 −0

Original line number	Diff line number	Diff line
		@@ -1091,6 +1091,13 @@ static int macvlan_device_event(struct notifier_block *unused,
		netdev_update_features(vlan->dev);
		}
		break;
		case NETDEV_CHANGEMTU:
		list_for_each_entry(vlan, &port->vlans, list) {
		if (vlan->dev->mtu <= dev->mtu)
		continue;
		dev_set_mtu(vlan->dev, dev->mtu);
		}
		break;
		case NETDEV_UNREGISTER:
		/* twiddle thumbs on netns device moves */
		if (dev->reg_state != NETREG_UNREGISTERING)