X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;f=datapath%2Ftunnel.c;h=8d5a6d47cb09c1c54fb5f79ef042d8e1bfe846b7;hb=26fd9d16d32078ccbea0d8a7bc87d2ed4793039f;hp=83d2c413170341ffa86c2a6607918efb382d3aae;hpb=c25ea53406a819bc2acff7b50e804c21f307bdec;p=sliver-openvswitch.git

diff --git a/datapath/tunnel.c b/datapath/tunnel.c
index 83d2c4131..8d5a6d47c 100644
--- a/datapath/tunnel.c
+++ b/datapath/tunnel.c
@@ -280,6 +280,15 @@ int ovs_tnl_send(struct vport *vport, struct sk_buff *skb)
 		/* Push Tunnel header. */
 		tnl_vport->tnl_ops->build_header(vport, skb, tunnel_hlen);
 
+		/*
+		 * Allow our local IP stack to fragment the outer packet even
+		 * if the 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), skb_dst(skb), 0);
+
 		/* Push IP header. */
 		iph = ip_hdr(skb);
 		iph->version	= 4;