datapath: Set a large MTU on tunnel devices.

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

diff --git a/datapath/linux/compat/vxlan.c b/datapath/linux/compat/vxlan.c
index f443a1b..769b76f 100644 (file)
--- a/datapath/linux/compat/vxlan.c
+++ b/datapath/linux/compat/vxlan.c
@@ -1905,6 +1905,7 @@ static int vxlan_dev_configure(struct net *src_net, struct net_device *dev,
        int err;
        bool use_ipv6 = false;
        __be16 default_port = vxlan->cfg.dst_port;
+       struct net_device *lowerdev = NULL;
 
        vxlan->net = src_net;
 
@@ -1924,9 +1925,7 @@ static int vxlan_dev_configure(struct net *src_net, struct net_device *dev,
        }
 
        if (conf->remote_ifindex) {
-               struct net_device *lowerdev
-                        = __dev_get_by_index(src_net, conf->remote_ifindex);
-
+               lowerdev = __dev_get_by_index(src_net, conf->remote_ifindex);
                dst->remote_ifindex = conf->remote_ifindex;
 
                if (!lowerdev) {
@@ -1957,6 +1956,12 @@ static int vxlan_dev_configure(struct net *src_net, struct net_device *dev,
                dev->needed_headroom = ETH_HLEN + VXLAN_HEADROOM;
        }
 
+       if (conf->mtu) {
+               err = __vxlan_change_mtu(dev, lowerdev, dst, conf->mtu, false);
+               if (err)
+                       return err;
+       }
+
        memcpy(&vxlan->cfg, conf, sizeof(*conf));
        if (!vxlan->cfg.dst_port)
                vxlan->cfg.dst_port = default_port;