Re: [PATCH cumulus-4.1.y 2/5] vxlan: don't replace fdb entry if nothing changed

On 1/23/17, 9:02 AM, Stephen Hemminger wrote:

On Fri, 20 Jan 2017 23:40:07 -0800
Roopa Prabhu [off-list ref] wrote:

quoted

+	if (!vxlan_addr_equal(&rd->remote_ip, ip) ||
+	    rd->remote_port != port ||
+	    rd->remote_vni != vni ||
+	    rd->remote_ifindex != ifindex) {
+		dst_cache_reset(&rd->dst_cache);
+		rd->remote_ip = *ip;
+		rd->remote_port = port;
+		rd->remote_vni = vni;
+		rd->remote_ifindex = ifindex;
+		return 1;
+	}
+

I think it would be clearer if negative logic was avoided.

	if (vxlan_addr_equal(&rd->remote_ip, ip) &&
	    rd->remote_port == port &&
	    rd->remote_vni == vni &&
            rd->ermote_ifindex == ifndex)
		return 1;

	dst_cache_reset ...

ack, this was an accidental hit on send as well.
It is on my upstream patch stack..but i think this patch is not really needed upstream because
a previous call to vxlan_fdb_find_rdst in vxlan_fdb_replace does the same thing.

I will test again and repost if needed, thanks.