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