batman-adv: NETIF_F_NETNS_LOCAL feature to prevent netns moves

The batX soft interface should not be moved between network name
spaces. This is similar to bridges, bonds, tunnels, which are not
allowed to move between network namespaces.

Suggested-by: Daniel Ehlers <danielehlers@mindeye.net>
Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Acked-by: Antonio Quartulli <a@unstable.cc>
Reviewed-by: Sven Eckelmann <sven@narfation.org>
Signed-off-by: Marek Lindner <mareklindner@neomailbox.ch>
Signed-off-by: Antonio Quartulli <a@unstable.cc>

diff --git a/net/batman-adv/soft-interface.c b/net/batman-adv/soft-interface.c
index d72f8870773690dd336f7df8e796a73fbe2a7174..66dd0aac480ae175eed018b7c041de3e0cc1a437 100644 (file)
--- a/net/batman-adv/soft-interface.c
+++ b/net/batman-adv/soft-interface.c
@@ -972,7 +972,7 @@ static void batadv_softif_init_early(struct net_device *dev)
 
        dev->netdev_ops = &batadv_netdev_ops;
        dev->destructor = batadv_softif_free;
-       dev->features |= NETIF_F_HW_VLAN_CTAG_FILTER;
+       dev->features |= NETIF_F_HW_VLAN_CTAG_FILTER | NETIF_F_NETNS_LOCAL;
        dev->priv_flags |= IFF_NO_QUEUE;
 
        /* can't call min_mtu, because the needed variables