gre6: allow to update all parameters via rtnl

Parameters were updated only if the kernel was unable to find the tunnel
with the new parameters, ie only if core pamareters were updated (keys,
addr, link, type).
Now it's possible to update ttl, hoplimit, flowinfo and flags.

Fixes: c12b395a4664 ("gre: Support GRE over IPv6")
Signed-off-by: Nicolas Dichtel <nicolas.dichtel@6wind.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/net/ipv6/ip6_gre.c b/net/ipv6/ip6_gre.c
index 3c7b931..e5ea177 100644 (file)
--- a/net/ipv6/ip6_gre.c
+++ b/net/ipv6/ip6_gre.c
@@ -1571,13 +1571,11 @@ static int ip6gre_changelink(struct net_device *dev, struct nlattr *tb[],
                        return -EEXIST;
        } else {
                t = nt;
-
-               ip6gre_tunnel_unlink(ign, t);
-               ip6gre_tnl_change(t, &p, !tb[IFLA_MTU]);
-               ip6gre_tunnel_link(ign, t);
-               netdev_state_change(dev);
        }
 
+       ip6gre_tunnel_unlink(ign, t);
+       ip6gre_tnl_change(t, &p, !tb[IFLA_MTU]);
+       ip6gre_tunnel_link(ign, t);
        return 0;
 }