Support route deletion entries in SVP_R_LOG_ACK.

@@ -560,10 +560,38 @@
                 }
         }
 }
 
 void
+libvarpd_route_flush(varpd_provider_handle_t *vph, uint8_t *srcip,
+    uint8_t *dstip, uint8_t src_prefixlen, uint8_t dst_prefixlen,
+    uint16_t vlan_id)
+{
+        varpd_instance_t *inst = (varpd_instance_t *)vph;
+        varpd_impl_t *vip = inst->vri_impl;
+        overlay_targ_cache_net_t otcn;
+        overlay_targ_cache_net_entry_t *otcne;
+        int ret;
+
+        otcn.otcn_linkid = inst->vri_linkid;
+        otcne = &otcn.otcn_entry;
+        bcopy(srcip, &otcne->otcne_src, sizeof (in6_addr_t));
+        bcopy(dstip, &otcne->otcne_dst, sizeof (in6_addr_t));
+        otcne->otcne_vlan = vlan_id;
+        otcne->otcne_src_prefixlen = src_prefixlen;
+        otcne->otcne_dst_prefixlen = dst_prefixlen;
+
+        ret = ioctl(vip->vdi_overlayfd, OVERLAY_TARG_CACHE_REMOVE_NET, &otcn);
+        if (ret != 0) {
+                /* XXX KEBE ASKS, any harmless error cases? */
+                libvarpd_panic("received bad errno from "
+                    "OVERLAY_TARG_CACHE_REMOVE_NET: %d - %s", errno,
+                    strerror(errno));
+        }
+}
+
+void
 libvarpd_fma_degrade(varpd_provider_handle_t *vph, const char *msg)
 {
         int ret;
         varpd_instance_t *inst = (varpd_instance_t *)vph;