tunneling: Force selection of an IP ID with GRE.

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

diff --git a/datapath/vport-gre.c b/datapath/vport-gre.c
index fc489e9..46e0be8 100644 (file)
--- a/datapath/vport-gre.c
+++ b/datapath/vport-gre.c
@@ -103,9 +103,12 @@ static struct sk_buff *gre_update_header(const struct vport *vport,
                                                0));
        /*
         * Allow our local IP stack to fragment the outer packet even if the
-        * DF bit is set as a last resort.
+        * DF bit is set as a last resort.  We also need to force selection of
+        * an IP ID here because Linux will otherwise leave it at 0 if the
+        * packet originally had DF set.
         */
        skb->local_df = 1;
+       __ip_select_ident(ip_hdr(skb), dst, 0);
 
        return skb;
 }
@@ -342,7 +345,7 @@ static int gre_rcv(struct sk_buff *skb)
        __skb_pull(skb, hdr_len);
        skb_postpull_rcsum(skb, skb_transport_header(skb), hdr_len + ETH_HLEN);
 
-       tnl_rcv(vport, skb);
+       tnl_rcv(vport, skb, iph->tos);
        return 0;
 
 error:
@@ -391,7 +394,6 @@ const struct vport_ops gre_vport_ops = {
        .exit           = gre_exit,
        .create         = gre_create,
        .destroy        = tnl_destroy,
-       .set_mtu        = tnl_set_mtu,
        .set_addr       = tnl_set_addr,
        .get_name       = tnl_get_name,
        .get_addr       = tnl_get_addr,
@@ -400,6 +402,5 @@ const struct vport_ops gre_vport_ops = {
        .get_dev_flags  = vport_gen_get_dev_flags,
        .is_running     = vport_gen_is_running,
        .get_operstate  = vport_gen_get_operstate,
-       .get_mtu        = tnl_get_mtu,
        .send           = tnl_send,
 };