vpnmanager/impl/src/main/java/org/opendaylight/netvirt/vpnmanager/CentralizedSwitchChangeListener.java

   1 /*
   2  * Copyright (c) 2016 Hewlett Packard Enterprise, Co. 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
   9 package org.opendaylight.netvirt.vpnmanager;
  10
  11 import static org.opendaylight.genius.infra.Datastore.CONFIGURATION;
  12
  13 import java.util.ArrayList;
  14 import java.util.Map;
  15 import java.util.Objects;
  16 import java.util.concurrent.ExecutionException;
  17 import javax.annotation.PreDestroy;
  18 import javax.inject.Inject;
  19 import javax.inject.Singleton;
  20 import org.opendaylight.genius.infra.Datastore.Configuration;
  21 import org.opendaylight.genius.infra.ManagedNewTransactionRunner;
  22 import org.opendaylight.genius.infra.ManagedNewTransactionRunnerImpl;
  23 import org.opendaylight.genius.infra.TypedReadWriteTransaction;
  24 import org.opendaylight.genius.mdsalutil.NwConstants;
  25 import org.opendaylight.infrautils.utils.concurrent.Executors;
  26 import org.opendaylight.infrautils.utils.concurrent.ListenableFutures;
  27 import org.opendaylight.mdsal.binding.api.DataBroker;
  28 import org.opendaylight.mdsal.common.api.LogicalDatastoreType;
  29 import org.opendaylight.netvirt.vpnmanager.api.IVpnManager;
  30 import org.opendaylight.serviceutils.tools.listener.AbstractAsyncDataTreeChangeListener;
  31 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.yang.types.rev130715.Uuid;
  32 import org.opendaylight.yang.gen.v1.urn.opendaylight.netvirt.natservice.rev160111.NaptSwitches;
  33 import org.opendaylight.yang.gen.v1.urn.opendaylight.netvirt.natservice.rev160111.ext.routers.Routers;
  34 import org.opendaylight.yang.gen.v1.urn.opendaylight.netvirt.natservice.rev160111.ext.routers.routers.ExternalIps;
  35 import org.opendaylight.yang.gen.v1.urn.opendaylight.netvirt.natservice.rev160111.ext.routers.routers.ExternalIpsKey;
  36 import org.opendaylight.yang.gen.v1.urn.opendaylight.netvirt.natservice.rev160111.napt.switches.RouterToNaptSwitch;
  37 import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
  38 import org.opendaylight.yangtools.yang.common.Uint64;
  39 import org.slf4j.Logger;
  40 import org.slf4j.LoggerFactory;
  41
  42 /**
  43  * CentralizedSwitchChangeListener detect changes in switch:router mapping and
  44  * update flows accordingly.<br>
  45  * The centralized switch a.k.a NAPT switch is currently defined using models
  46  * residing in natservice bundle. As the roles of centralized switch will grow
  47  * beyond NAT use cases, the associated models and logic need to be renamed
  48  * and moved to either vpnmanager or new bundle as part of Carbon model changes
  49  *
  50  */
  51 @Singleton
  52 public class CentralizedSwitchChangeListener
  53         extends AbstractAsyncDataTreeChangeListener<RouterToNaptSwitch> {
  54
  55     private static final Logger LOG = LoggerFactory.getLogger(CentralizedSwitchChangeListener.class);
  56
  57     private final DataBroker dataBroker;
  58     private final ManagedNewTransactionRunner txRunner;
  59     private final IVpnManager vpnManager;
  60     private final ExternalRouterDataUtil externalRouterDataUtil;
  61     private final VpnUtil vpnUtil;
  62
  63     @Inject
  64     public CentralizedSwitchChangeListener(final DataBroker dataBroker, final IVpnManager vpnManager,
  65             final ExternalRouterDataUtil externalRouterDataUtil, final VpnUtil vpnUtil) {
  66         super(dataBroker, LogicalDatastoreType.CONFIGURATION,
  67                 InstanceIdentifier.create(NaptSwitches.class).child(RouterToNaptSwitch.class),
  68                 Executors.newListeningSingleThreadExecutor("CentralizedSwitchChangeListener", LOG));
  69         this.dataBroker = dataBroker;
  70         this.txRunner = new ManagedNewTransactionRunnerImpl(dataBroker);
  71         this.vpnManager = vpnManager;
  72         this.externalRouterDataUtil = externalRouterDataUtil;
  73         this.vpnUtil = vpnUtil;
  74     }
  75
  76     public void start() {
  77         LOG.info("{} start", getClass().getSimpleName());
  78     }
  79
  80     @Override
  81     @PreDestroy
  82     public void close() {
  83         super.close();
  84         Executors.shutdownAndAwaitTermination(getExecutorService());
  85     }
  86
  87     @Override
  88     public void remove(InstanceIdentifier<RouterToNaptSwitch> key, RouterToNaptSwitch routerToNaptSwitch) {
  89         LOG.debug("Removing {}", routerToNaptSwitch);
  90         ListenableFutures.addErrorLogging(txRunner.callWithNewReadWriteTransactionAndSubmit(CONFIGURATION, tx ->
  91                                             setupRouterGwFlows(routerToNaptSwitch, tx, NwConstants.DEL_FLOW)), LOG,
  92                                                 "Error processing switch removal for {}", routerToNaptSwitch);
  93     }
  94
  95     @Override
  96     public void update(InstanceIdentifier<RouterToNaptSwitch> key, RouterToNaptSwitch origRouterToNaptSwitch,
  97             RouterToNaptSwitch updatedRouterToNaptSwitch) {
  98         LOG.debug("Updating old {} new {}", origRouterToNaptSwitch, updatedRouterToNaptSwitch);
  99         if (!Objects.equals(updatedRouterToNaptSwitch.getPrimarySwitchId(),
 100                 origRouterToNaptSwitch.getPrimarySwitchId())) {
 101             ListenableFutures.addErrorLogging(txRunner.callWithNewReadWriteTransactionAndSubmit(CONFIGURATION, tx -> {
 102                 setupRouterGwFlows(origRouterToNaptSwitch, tx, NwConstants.DEL_FLOW);
 103                 setupRouterGwFlows(updatedRouterToNaptSwitch, tx, NwConstants.ADD_FLOW);
 104             }), LOG, "Error updating switch {} to {}", origRouterToNaptSwitch, updatedRouterToNaptSwitch);
 105         }
 106     }
 107
 108     @Override
 109     public void add(InstanceIdentifier<RouterToNaptSwitch> key, RouterToNaptSwitch routerToNaptSwitch) {
 110         LOG.debug("Adding {}", routerToNaptSwitch);
 111         ListenableFutures.addErrorLogging(txRunner.callWithNewReadWriteTransactionAndSubmit(CONFIGURATION, tx ->
 112                         setupRouterGwFlows(routerToNaptSwitch, tx, NwConstants.ADD_FLOW)), LOG,
 113                 "Error processing switch addition for {}", routerToNaptSwitch);
 114     }
 115
 116     private void setupRouterGwFlows(RouterToNaptSwitch routerToNaptSwitch,
 117             TypedReadWriteTransaction<Configuration> confTx, int addOrRemove)
 118                                     throws ExecutionException, InterruptedException {
 119         Routers router = null;
 120         if (addOrRemove == NwConstants.ADD_FLOW) {
 121             router = vpnUtil.getExternalRouter(routerToNaptSwitch.getRouterName());
 122         }
 123         else {
 124             router = externalRouterDataUtil.getRouter(routerToNaptSwitch.getRouterName());
 125         }
 126         if (router == null) {
 127             LOG.warn("No router data found for router id {}", routerToNaptSwitch.getRouterName());
 128             return;
 129         }
 130
 131         Uint64 primarySwitchId = routerToNaptSwitch.getPrimarySwitchId();
 132         Uuid extNetworkId = router.getNetworkId();
 133         String extGwMacAddress = router.getExtGwMacAddress();
 134         String routerName = router.getRouterName();
 135         Map<ExternalIpsKey, ExternalIps> externalIpsMap = router.getExternalIps();
 136         if (externalIpsMap.isEmpty()) {
 137             LOG.error("CentralizedSwitchChangeListener: setupRouterGwFlows no externalIP present");
 138             return;
 139         }
 140
 141         for (ExternalIps extIp : router.nonnullExternalIps().values()) {
 142             Uuid subnetVpnName = extIp.getSubnetId();
 143             if (addOrRemove == NwConstants.ADD_FLOW) {
 144                 vpnManager.addRouterGwMacFlow(routerName, extGwMacAddress, primarySwitchId, extNetworkId,
 145                         subnetVpnName.getValue(), confTx);
 146                 externalRouterDataUtil.addtoRouterMap(router);
 147             } else {
 148                 vpnManager.removeRouterGwMacFlow(routerName, extGwMacAddress, primarySwitchId, extNetworkId,
 149                         subnetVpnName.getValue(), confTx);
 150                 externalRouterDataUtil.removeFromRouterMap(router);
 151             }
 152         }
 153
 154         if (addOrRemove == NwConstants.ADD_FLOW) {
 155             vpnManager.addArpResponderFlowsToExternalNetworkIps(routerName,
 156                     VpnUtil.getIpsListFromExternalIps(new ArrayList<ExternalIps>(router.getExternalIps().values())),
 157                     extGwMacAddress, primarySwitchId, extNetworkId);
 158         } else {
 159             vpnManager.removeArpResponderFlowsToExternalNetworkIps(routerName,
 160                     VpnUtil.getIpsListFromExternalIps(new ArrayList<ExternalIps>(router.getExternalIps().values())),
 161                     extGwMacAddress, primarySwitchId, extNetworkId);
 162         }
 163     }
 164 }