gre: allow live address change

The GRE tap device supports Ethernet over GRE, but doesn't
care about the source address of the tunnel, therefore it
can be changed without bring device down.

Signed-off-by: Stephen Hemminger <[email protected]>
Signed-off-by: David S. Miller <[email protected]>

diff --git a/net/ipv4/ip_gre.c b/net/ipv4/ip_gre.c
index 4f4bf5b99686ee8f13cfd353b7dca307f9260dbc..942576e27df163fe4c851bfb06346e5f7cab84ee 100644 (file)
--- a/net/ipv4/ip_gre.c
+++ b/net/ipv4/ip_gre.c
@@ -673,6 +673,7 @@ static bool ipgre_netlink_encap_parms(struct nlattr *data[],
 static int gre_tap_init(struct net_device *dev)
 {
        __gre_tunnel_init(dev);
+       dev->priv_flags |= IFF_LIVE_ADDR_CHANGE;
 
        return ip_tunnel_init(dev);
 }