From d70f2cf520cf8c86c6b467fc5dcea524ec51dc2f Mon Sep 17 00:00:00 2001
From: Kevin Wallace <kevin@pentabarf.net>
Date: Tue, 3 Dec 2013 02:55:22 -0800
Subject: [PATCH] macvlan: Support creating macvtaps from macvlans

When running in a network namespace whose only link to the outside
world is a macvlan device, not being able to create a macvtap off of
it is a real pain.

So modify macvtap creation to automatically forward a creation of a
macvtap on a macvlan to become a creation of a macvtap on the
underlying network device, just like is currently done with
macvlan-on-macvlan devices.

v2: Use netif_is_macvlan and macvlan_dev_real_dev helpers to make it
    more clear what we're doing.

Signed-off-by: Kevin Wallace <kevin@pentabarf.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
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