datapath: Set a large MTU on tunnel devices.

[cascardo/ovs.git] / datapath / linux / compat / ip_gre.c

diff --git a/datapath/linux/compat/ip_gre.c b/datapath/linux/compat/ip_gre.c
index c9197e9..f6a841f 100644 (file)
--- a/datapath/linux/compat/ip_gre.c
+++ b/datapath/linux/compat/ip_gre.c
@@ -613,6 +613,14 @@ struct net_device *rpl_gretap_fb_dev_create(struct net *net, const char *name,
 #endif
        if (err < 0)
                goto out;
+
+       /* openvswitch users expect packet sizes to be unrestricted,
+        * so set the largest MTU we can.
+        */
+       err = __ip_tunnel_change_mtu(dev, IP_MAX_MTU, false);
+       if (err)
+               goto out;
+
        return dev;
 out:
        free_netdev(dev);