datapath: Consider tunnels to have no MTU, fixing jumbo frame support.

[sliver-openvswitch.git] / datapath / datapath.c

diff --git a/datapath/datapath.c b/datapath/datapath.c
index 74f276b..ba32e37 100644 (file)
--- a/datapath/datapath.c
+++ b/datapath/datapath.c
@@ -773,6 +773,8 @@ int dp_min_mtu(const struct datapath *dp)
                        continue;
 
                dev_mtu = vport_get_mtu(p);
+               if (!dev_mtu)
+                       continue;
                if (!mtu || dev_mtu < mtu)
                        mtu = dev_mtu;
        }
@@ -1582,6 +1584,7 @@ static int odp_vport_cmd_fill_info(struct vport *vport, struct sk_buff *skb,
        struct odp_header *odp_header;
        struct nlattr *nla;
        int ifindex, iflink;
+       int mtu;
        int err;
 
        odp_header = genlmsg_put(skb, pid, seq, &dp_vport_genl_family,
@@ -1603,7 +1606,9 @@ static int odp_vport_cmd_fill_info(struct vport *vport, struct sk_buff *skb,
 
        NLA_PUT(skb, ODP_VPORT_ATTR_ADDRESS, ETH_ALEN, vport_get_addr(vport));
 
-       NLA_PUT_U32(skb, ODP_VPORT_ATTR_MTU, vport_get_mtu(vport));
+       mtu = vport_get_mtu(vport);
+       if (mtu)
+               NLA_PUT_U32(skb, ODP_VPORT_ATTR_MTU, mtu);
 
        err = vport_get_options(vport, skb);
        if (err == -EMSGSIZE)