netdev - Cannot move macvlan interface on top of bonding device

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Message-ID: <CA+HUmGi74nx0zELqXX63nJCNXshTC9AkWoRG5bo6AMHyr_3+fg@mail.gmail.com>
Date:	Wed, 17 Sep 2014 08:56:41 -0700
From:	Francesco Ruggeri <fruggeri@...sta.com>
To:	netdev@...r.kernel.org
Cc:	"David S. Miller" <davem@...emloft.net>,
	Weilong Chen <chenweilong@...wei.com>,
	Florian Westphal <fw@...len.de>,
	Francesco Ruggeri <fruggeri@...sta.com>
Subject: Cannot move macvlan interface on top of bonding device

I cannot move a macvlan interface created on top of a bonding interface
to a different namespace:

# ip netns add dummy0
# ip link add link bond0 mac0 type macvlan
# ip link set mac0 netns dummy0
RTNETLINK answers: Invalid argument
#

This used to work in older releases.
The problem seems to be that commit f939981492 sets NETIF_F_NETNS_LOCAL
on bonding interfaces, and commit 797f87f83 causes macvlan interfaces
to inherit its features from the lower device.

Is there a reason why NETIF_F_NETNS_LOCAL should be inherited from the
lower device
by macvlan interfaces?

Thanks,
Francesco Ruggeri
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