[PATCH 3.14 19/37] net: allow macvlans to move to net namespace

From: Greg Kroah-Hartman
Date: Sun Oct 12 2014 - 22:56:35 EST

3.14-stable review patch. If anyone has any objections, please let me know.


From: Francesco Ruggeri <fruggeri@xxxxxxxxxx>

[ Upstream commit 0d0162e7a33d3710b9604e7c68c0f31f5c457428 ]

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

The problem seems to be that commit f9399814927a ("bonding: Don't allow
bond devices to change network namespaces.") sets NETIF_F_NETNS_LOCAL
on bonding interfaces, and commit 797f87f83b60 ("macvlan: fix netdev
feature propagation from lower device") causes macvlan interfaces
to inherit its features from the lower device.

NETIF_F_NETNS_LOCAL should not be inherited from the lower device
by a macvlan.
Patch tested on 3.16.

Signed-off-by: Francesco Ruggeri <fruggeri@xxxxxxxxxx>
Acked-by: Cong Wang <cwang@xxxxxxxxxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
drivers/net/macvlan.c | 1 +
1 file changed, 1 insertion(+)

--- a/drivers/net/macvlan.c
+++ b/drivers/net/macvlan.c
@@ -709,6 +709,7 @@ static netdev_features_t macvlan_fix_fea
+ features &= ~NETIF_F_NETNS_LOCAL;

return features;

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