ipvlan: fix IFLA_MTU ignored on NEWLINK
Commit296d485680
("ipvlan: inherit MTU from master device") adjusted the mtu from the master device when creating a ipvlan device, but it would also override the mtu value set in rtnl_create_link. It causes IFLA_MTU param not to take effect. So this patch is to not adjust the mtu if IFLA_MTU param is set when creating a ipvlan device. Fixes:296d485680
("ipvlan: inherit MTU from master device") Reported-by: Jianlin Shi <jishi@redhat.com> Signed-off-by: Xin Long <lucien.xin@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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@ -594,7 +594,8 @@ int ipvlan_link_new(struct net *src_net, struct net_device *dev,
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ipvlan->phy_dev = phy_dev;
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ipvlan->dev = dev;
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ipvlan->sfeatures = IPVLAN_FEATURES;
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ipvlan_adjust_mtu(ipvlan, phy_dev);
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if (!tb[IFLA_MTU])
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ipvlan_adjust_mtu(ipvlan, phy_dev);
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INIT_LIST_HEAD(&ipvlan->addrs);
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spin_lock_init(&ipvlan->addrs_lock);
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