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