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Commit 296d4856 authored by Mahesh Bandewar's avatar Mahesh Bandewar Committed by David S. Miller
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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: default avatarMahesh Bandewar <maheshb@google.com>
CC: Eric Dumazet <eric.dumazet@gmail.com>
CC: Tim Hockins <thockins@google.com>
Acked-by: default avatarEric Dumazet <edumazet@google.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent b45efa30

drivers/net/ipvlan/ipvlan_main.c

+1 −0
Original line number Diff line number Diff line
@@ -468,6 +468,7 @@ static int ipvlan_link_new(struct net *src_net, struct net_device *dev, 
	ipvlan->dev = dev;

	ipvlan->port = port;

	ipvlan->sfeatures = IPVLAN_FEATURES;

	ipvlan_adjust_mtu(ipvlan, phy_dev);

	INIT_LIST_HEAD(&ipvlan->addrs);



	/* TODO Probably put random address here to be presented to the