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ipvlan: inherit MTU from master device
When we create IPvlan slave; we use ether_setup() and that sets up default MTU to 1500 while the master device may have lower / different MTU. Any subsequent changes to the masters' MTU are reflected into the slaves' MTU setting. However if those don't happen (most likely scenario), the slaves' MTU stays at 1500 which could be bad. This change adds code to inherit MTU from the master device instead of using the default value during the link initialization phase. Signed-off-by: Mahesh Bandewar <maheshb@google.com> CC: Eric Dumazet <eric.dumazet@gmail.com> CC: Tim Hockins <thockins@google.com> Acked-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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@ -468,6 +468,7 @@ static int ipvlan_link_new(struct net *src_net, struct net_device *dev,
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ipvlan->dev = dev;
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ipvlan->port = port;
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ipvlan->sfeatures = IPVLAN_FEATURES;
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ipvlan_adjust_mtu(ipvlan, phy_dev);
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INIT_LIST_HEAD(&ipvlan->addrs);
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/* TODO Probably put random address here to be presented to the
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