vpnservice/neutronvpn/neutronvpn-impl/src/main/java/org/opendaylight/netvirt/neutronvpn/NeutronRouterChangeListener.java

   1 /*
   2  * Copyright (c) 2016 Ericsson India Global Services Pvt Ltd. and others.  All rights reserved.
   3  *
   4  * This program and the accompanying materials are made available under the
   5  * terms of the Eclipse Public License v1.0 which accompanies this distribution,
   6  * and is available at http://www.eclipse.org/legal/epl-v10.html
   7  */
   8 package org.opendaylight.netvirt.neutronvpn;
   9
  10 import com.google.common.base.Optional;
  11 import java.util.ArrayList;
  12 import java.util.HashMap;
  13 import java.util.Iterator;
  14 import java.util.List;
  15 import org.opendaylight.controller.md.sal.binding.api.DataBroker;
  16 import org.opendaylight.controller.md.sal.binding.api.DataChangeListener;
  17 import org.opendaylight.controller.md.sal.common.api.data.AsyncDataBroker.DataChangeScope;
  18 import org.opendaylight.controller.md.sal.common.api.data.LogicalDatastoreType;
  19 import org.opendaylight.genius.mdsalutil.AbstractDataChangeListener;
  20 import org.opendaylight.genius.mdsalutil.NwConstants;
  21 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.yang.types.rev130715.Uuid;
  22 import org.opendaylight.yang.gen.v1.urn.opendaylight.neutron.l3.rev150712.l3.attributes.Routes;
  23 import org.opendaylight.yang.gen.v1.urn.opendaylight.neutron.l3.rev150712.routers.attributes.Routers;
  24 import org.opendaylight.yang.gen.v1.urn.opendaylight.neutron.l3.rev150712.routers.attributes.routers.Router;
  25 import org.opendaylight.yang.gen.v1.urn.opendaylight.neutron.rev150712.Neutron;
  26 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.netvirt.inter.vpn.link.rev160311.inter.vpn.link.states.InterVpnLinkState;
  27 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.netvirt.inter.vpn.link.rev160311.inter.vpn.links.InterVpnLink;
  28 import org.opendaylight.yangtools.concepts.ListenerRegistration;
  29 import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
  30 import org.slf4j.Logger;
  31 import org.slf4j.LoggerFactory;
  32
  33 public class NeutronRouterChangeListener extends AbstractDataChangeListener<Router> implements AutoCloseable {
  34     private static final Logger LOG = LoggerFactory.getLogger(NeutronRouterChangeListener.class);
  35     private ListenerRegistration<DataChangeListener> listenerRegistration;
  36     private final DataBroker dataBroker;
  37     private final NeutronvpnManager nvpnManager;
  38     private final NeutronvpnNatManager nvpnNatManager;
  39     private final NeutronSubnetGwMacResolver gwMacResolver;
  40
  41     public NeutronRouterChangeListener(final DataBroker dataBroker, final NeutronvpnManager nVpnMgr,
  42                                        final NeutronvpnNatManager nVpnNatMgr, NeutronSubnetGwMacResolver gwMacResolver) {
  43         super(Router.class);
  44         this.dataBroker = dataBroker;
  45         nvpnManager = nVpnMgr;
  46         nvpnNatManager = nVpnNatMgr;
  47         this.gwMacResolver = gwMacResolver;
  48     }
  49
  50     public void start() {
  51         LOG.info("{} start", getClass().getSimpleName());
  52         listenerRegistration = dataBroker.registerDataChangeListener(LogicalDatastoreType.CONFIGURATION,
  53                 getWildCardPath(), this, DataChangeScope.SUBTREE);
  54     }
  55
  56     private InstanceIdentifier<Router> getWildCardPath() {
  57         return InstanceIdentifier.create(Neutron.class).child(Routers.class).child(Router.class);
  58     }
  59
  60     @Override
  61     public void close() throws Exception {
  62         if (listenerRegistration != null) {
  63             listenerRegistration.close();
  64             listenerRegistration = null;
  65         }
  66         LOG.info("{} close", getClass().getSimpleName());
  67     }
  68
  69     @Override
  70     protected void add(InstanceIdentifier<Router> identifier, Router input) {
  71         if (LOG.isTraceEnabled()) {
  72             LOG.trace("Adding Router : key: " + identifier + ", value=" + input);
  73         }
  74         // Create internal VPN
  75         nvpnManager.createL3InternalVpn(input.getUuid(), null, null, null, null, null, input.getUuid(), null);
  76         NeutronvpnUtils.addToRouterCache(input);
  77         gwMacResolver.sendArpRequestsToExtGateways(input);
  78     }
  79
  80     @Override
  81     protected void remove(InstanceIdentifier<Router> identifier, Router input) {
  82         if (LOG.isTraceEnabled()) {
  83             LOG.trace("Removing router : key: " + identifier + ", value=" + input);
  84         }
  85         Uuid routerId = input.getUuid();
  86         //NOTE: Pass an empty routerSubnetIds list, as router interfaces
  87         //will be removed from VPN by invocations from NeutronPortChangeListener
  88         List<Uuid> routerSubnetIds = new ArrayList<>();
  89         nvpnManager.handleNeutronRouterDeleted(routerId, routerSubnetIds);
  90         NeutronvpnUtils.removeFromRouterCache(input);
  91
  92         // Handle router deletion for the NAT service
  93         if (input.getExternalGatewayInfo() != null) {
  94             Uuid extNetId = input.getExternalGatewayInfo().getExternalNetworkId();
  95             nvpnNatManager.removeExternalNetworkFromRouter(extNetId, input);
  96         }
  97
  98     }
  99
 100     @Override
 101     protected void update(InstanceIdentifier<Router> identifier, Router original, Router update) {
 102         LOG.trace("Updating Router : key: {}, original value={}, update value={}", identifier, original, update);
 103         Uuid routerId = update.getUuid();
 104         NeutronvpnUtils.addToRouterCache(update);
 105         Uuid vpnId = NeutronvpnUtils.getVpnForRouter(dataBroker, routerId, true);
 106         // internal vpn always present in case external vpn not found
 107         if (vpnId == null) {
 108             vpnId = routerId;
 109         }
 110         List<Routes> oldRoutes = (original.getRoutes() != null) ? original.getRoutes() : new ArrayList<Routes>();
 111         List<Routes> newRoutes = (update.getRoutes() != null) ? update.getRoutes() : new ArrayList<Routes>();
 112         if (!oldRoutes.equals(newRoutes)) {
 113             Iterator<Routes> iterator = newRoutes.iterator();
 114             while (iterator.hasNext()) {
 115                 Routes route = iterator.next();
 116                 if (oldRoutes.remove(route)) {
 117                     iterator.remove();
 118                 }
 119             }
 120
 121             handleChangedRoutes(vpnId, newRoutes, NwConstants.ADD_FLOW);
 122
 123             if (!oldRoutes.isEmpty()) {
 124                 handleChangedRoutes(vpnId, oldRoutes, NwConstants.DEL_FLOW);
 125             }
 126         }
 127
 128         nvpnNatManager.handleExternalNetworkForRouter(original, update);
 129         gwMacResolver.sendArpRequestsToExtGateways(update);
 130     }
 131
 132     private void handleChangedRoutes(Uuid vpnName, List<Routes> routes, int addedOrRemoved) {
 133         // Some routes may point to an InterVpnLink's endpoint, lets treat them differently
 134         List<Routes> interVpnLinkRoutes = new ArrayList<Routes>();
 135         List<Routes> otherRoutes = new ArrayList<Routes>();
 136         HashMap<String, InterVpnLink> nexthopsXinterVpnLinks = new HashMap<String, InterVpnLink>();
 137         for ( Routes route : routes ) {
 138             String nextHop = String.valueOf(route.getNexthop().getValue());
 139             // Nexthop is another VPN?
 140             Optional<InterVpnLink> interVpnLink = NeutronvpnUtils.getInterVpnLinkByEndpointIp(dataBroker, nextHop);
 141             if ( interVpnLink.isPresent() ) {
 142                 Optional<InterVpnLinkState> interVpnLinkState =
 143                         NeutronvpnUtils.getInterVpnLinkState(dataBroker, interVpnLink.get().getName());
 144                 if ( interVpnLinkState.isPresent() && interVpnLinkState.get().getState() == InterVpnLinkState.State.Active) {
 145                     interVpnLinkRoutes.add(route);
 146                     nexthopsXinterVpnLinks.put(nextHop, interVpnLink.get());
 147                 } else {
 148                     LOG.warn("Failed installing route to {}. Reason: InterVPNLink {} is not Active",
 149                             String.valueOf(route.getDestination().getValue()), interVpnLink.get().getName());
 150                 }
 151             } else {
 152                 otherRoutes.add(route);
 153             }
 154         }
 155
 156         if ( addedOrRemoved == NwConstants.ADD_FLOW ) {
 157             nvpnManager.addInterVpnRoutes(vpnName, interVpnLinkRoutes, nexthopsXinterVpnLinks);
 158             nvpnManager.addAdjacencyforExtraRoute(vpnName, otherRoutes);
 159         } else {
 160             nvpnManager.removeAdjacencyforExtraRoute(vpnName, otherRoutes);
 161             nvpnManager.removeInterVpnRoutes(vpnName, interVpnLinkRoutes, nexthopsXinterVpnLinks);
 162         }
 163     }
 164 }