elanmanager/impl/src/main/java/org/opendaylight/netvirt/elan/l2gw/utils/L2GatewayConnectionUtils.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
   9 package org.opendaylight.netvirt.elan.l2gw.utils;
  10
  11 import static org.opendaylight.netvirt.elan.utils.ElanUtils.isVxlanNetworkOrVxlanSegment;
  12
  13 import com.google.common.base.Optional;
  14 import com.google.common.collect.Lists;
  15 import com.google.common.util.concurrent.Futures;
  16 import com.google.common.util.concurrent.MoreExecutors;
  17 import com.google.common.util.concurrent.SettableFuture;
  18 import java.util.ArrayList;
  19 import java.util.Collections;
  20 import java.util.List;
  21 import java.util.Set;
  22 import java.util.concurrent.CopyOnWriteArrayList;
  23 import javax.annotation.Nonnull;
  24 import javax.annotation.PreDestroy;
  25 import javax.inject.Inject;
  26 import javax.inject.Singleton;
  27 import org.opendaylight.controller.md.sal.binding.api.DataBroker;
  28 import org.opendaylight.controller.md.sal.common.api.data.LogicalDatastoreType;
  29 import org.opendaylight.genius.mdsalutil.MDSALUtil;
  30 import org.opendaylight.genius.utils.hwvtep.HwvtepNodeHACache;
  31 import org.opendaylight.genius.utils.hwvtep.HwvtepSouthboundUtils;
  32 import org.opendaylight.genius.utils.hwvtep.HwvtepUtils;
  33 import org.opendaylight.infrautils.jobcoordinator.JobCoordinator;
  34 import org.opendaylight.netvirt.elan.cache.ElanInstanceCache;
  35 import org.opendaylight.netvirt.elan.l2gw.ha.listeners.HAOpClusteredListener;
  36 import org.opendaylight.netvirt.elan.l2gw.jobs.AssociateHwvtepToElanJob;
  37 import org.opendaylight.netvirt.elan.l2gw.jobs.DisAssociateHwvtepFromElanJob;
  38 import org.opendaylight.netvirt.elan.l2gw.listeners.HwvtepLogicalSwitchListener;
  39 import org.opendaylight.netvirt.elan.l2gw.listeners.LocalUcastMacListener;
  40 import org.opendaylight.netvirt.elan.utils.ElanClusterUtils;
  41 import org.opendaylight.netvirt.elanmanager.utils.ElanL2GwCacheUtils;
  42 import org.opendaylight.netvirt.neutronvpn.api.l2gw.L2GatewayCache;
  43 import org.opendaylight.netvirt.neutronvpn.api.l2gw.L2GatewayDevice;
  44 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.yang.types.rev130715.Uuid;
  45 import org.opendaylight.yang.gen.v1.urn.opendaylight.netvirt.elan.rev150602.elan.instances.ElanInstance;
  46 import org.opendaylight.yang.gen.v1.urn.opendaylight.neutron.l2gateways.rev150712.l2gateway.attributes.Devices;
  47 import org.opendaylight.yang.gen.v1.urn.opendaylight.neutron.l2gateways.rev150712.l2gateway.connections.attributes.L2gatewayConnections;
  48 import org.opendaylight.yang.gen.v1.urn.opendaylight.neutron.l2gateways.rev150712.l2gateway.connections.attributes.l2gatewayconnections.L2gatewayConnection;
  49 import org.opendaylight.yang.gen.v1.urn.opendaylight.neutron.l2gateways.rev150712.l2gateways.attributes.L2gateways;
  50 import org.opendaylight.yang.gen.v1.urn.opendaylight.neutron.l2gateways.rev150712.l2gateways.attributes.l2gateways.L2gateway;
  51 import org.opendaylight.yang.gen.v1.urn.opendaylight.neutron.l2gateways.rev150712.l2gateways.attributes.l2gateways.L2gatewayKey;
  52 import org.opendaylight.yang.gen.v1.urn.opendaylight.neutron.rev150712.Neutron;
  53 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.ovsdb.hwvtep.rev150901.HwvtepGlobalAugmentation;
  54 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.ovsdb.hwvtep.rev150901.hwvtep.global.attributes.LocalUcastMacs;
  55 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.ovsdb.hwvtep.rev150901.hwvtep.global.attributes.LogicalSwitches;
  56 import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.NodeId;
  57 import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.network.topology.topology.Node;
  58 import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
  59 import org.slf4j.Logger;
  60 import org.slf4j.LoggerFactory;
  61
  62 @Singleton
  63 public class L2GatewayConnectionUtils implements AutoCloseable {
  64     private static final Logger LOG = LoggerFactory.getLogger(L2GatewayConnectionUtils.class);
  65
  66     private final DataBroker broker;
  67     private final ElanL2GatewayUtils elanL2GatewayUtils;
  68     private final ElanClusterUtils elanClusterUtils;
  69     private final ElanL2GatewayMulticastUtils elanL2GatewayMulticastUtils;
  70     private final JobCoordinator jobCoordinator;
  71     private final L2GatewayCache l2GatewayCache;
  72     private final ElanInstanceCache elanInstanceCache;
  73     private final List<AutoCloseable> closeables = new CopyOnWriteArrayList<>();
  74     private final HwvtepNodeHACache hwvtepNodeHACache;
  75     private final HAOpClusteredListener haOpClusteredListener;
  76
  77     @Inject
  78     public L2GatewayConnectionUtils(DataBroker dataBroker,
  79             ElanClusterUtils elanClusterUtils, ElanL2GatewayUtils elanL2GatewayUtils,
  80             JobCoordinator jobCoordinator, ElanL2GatewayMulticastUtils elanL2GatewayMulticastUtils,
  81             L2GatewayCache l2GatewayCache, HAOpClusteredListener haOpClusteredListener,
  82             ElanInstanceCache elanInstanceCache, HwvtepNodeHACache hwvtepNodeHACache) {
  83         this.broker = dataBroker;
  84         this.elanL2GatewayUtils = elanL2GatewayUtils;
  85         this.elanClusterUtils = elanClusterUtils;
  86         this.elanL2GatewayMulticastUtils = elanL2GatewayMulticastUtils;
  87         this.jobCoordinator = jobCoordinator;
  88         this.l2GatewayCache = l2GatewayCache;
  89         this.haOpClusteredListener = haOpClusteredListener;
  90         this.elanInstanceCache = elanInstanceCache;
  91         this.hwvtepNodeHACache = hwvtepNodeHACache;
  92     }
  93
  94     @Override
  95     @PreDestroy
  96     @SuppressWarnings("checkstyle:IllegalCatch")
  97     public void close() {
  98         closeables.forEach(c -> {
  99             try {
 100                 c.close();
 101             } catch (Exception e) {
 102                 LOG.warn("Error closing {}", c, e);
 103             }
 104         });
 105     }
 106
 107     public static boolean isGatewayAssociatedToL2Device(L2GatewayDevice l2GwDevice) {
 108         return l2GwDevice.getL2GatewayIds().size() > 0;
 109     }
 110
 111     public static L2gateway getNeutronL2gateway(DataBroker broker, Uuid l2GatewayId) {
 112         LOG.debug("getNeutronL2gateway for {}", l2GatewayId.getValue());
 113         InstanceIdentifier<L2gateway> inst = InstanceIdentifier.create(Neutron.class).child(L2gateways.class)
 114                 .child(L2gateway.class, new L2gatewayKey(l2GatewayId));
 115         return MDSALUtil.read(broker, LogicalDatastoreType.CONFIGURATION, inst).orNull();
 116     }
 117
 118     @Nonnull
 119     public static List<L2gateway> getL2gatewayList(DataBroker broker) {
 120         InstanceIdentifier<L2gateways> inst = InstanceIdentifier.create(Neutron.class).child(L2gateways.class);
 121         return MDSALUtil.read(broker, LogicalDatastoreType.CONFIGURATION, inst).toJavaUtil().map(
 122                 L2gateways::getL2gateway).orElse(Collections.emptyList());
 123     }
 124
 125     @Nonnull
 126     public static List<L2gatewayConnection> getAllL2gatewayConnections(DataBroker broker) {
 127         InstanceIdentifier<L2gatewayConnections> inst = InstanceIdentifier.create(Neutron.class)
 128                 .child(L2gatewayConnections.class);
 129         return MDSALUtil.read(broker, LogicalDatastoreType.CONFIGURATION, inst).toJavaUtil().map(
 130                 L2gatewayConnections::getL2gatewayConnection).orElse(Collections.emptyList());
 131     }
 132
 133     /**
 134      * Gets the associated l2 gw connections.
 135      *
 136      * @param broker
 137      *            the broker
 138      * @param l2GatewayIds
 139      *            the l2 gateway ids
 140      * @return the associated l2 gw connections
 141      */
 142     @Nonnull
 143     public static List<L2gatewayConnection> getAssociatedL2GwConnections(DataBroker broker, Set<Uuid> l2GatewayIds) {
 144         List<L2gatewayConnection> allL2GwConns = getAllL2gatewayConnections(broker);
 145         List<L2gatewayConnection> l2GwConnections = new ArrayList<>();
 146         for (Uuid l2GatewayId : l2GatewayIds) {
 147             for (L2gatewayConnection l2GwConn : allL2GwConns) {
 148                 if (l2GwConn.getL2gatewayId().equals(l2GatewayId)) {
 149                     l2GwConnections.add(l2GwConn);
 150                 }
 151             }
 152         }
 153         return l2GwConnections;
 154     }
 155
 156     /**
 157      * Gets the associated l2 gw connections.
 158      *
 159      * @param broker
 160      *            the broker
 161      * @param elanName
 162      *            the elan Name
 163      * @return the associated l2 gw connection with elan
 164      */
 165     @Nonnull
 166     public static List<L2gatewayConnection> getL2GwConnectionsByElanName(DataBroker broker, String elanName) {
 167         List<L2gatewayConnection> allL2GwConns = getAllL2gatewayConnections(broker);
 168         List<L2gatewayConnection> elanL2GateWayConnections = new ArrayList<>();
 169         for (L2gatewayConnection l2GwConn : allL2GwConns) {
 170             if (l2GwConn.getNetworkId().getValue().equalsIgnoreCase(elanName)) {
 171                 elanL2GateWayConnections.add(l2GwConn);
 172             }
 173         }
 174         return elanL2GateWayConnections;
 175     }
 176
 177     public void addL2GatewayConnection(L2gatewayConnection input) {
 178         addL2GatewayConnection(input, null/*deviceName*/, null);
 179     }
 180
 181     public void addL2GatewayConnection(final L2gatewayConnection input,
 182                                        final String l2GwDeviceName) {
 183         addL2GatewayConnection(input, l2GwDeviceName, null);
 184     }
 185
 186     public void addL2GatewayConnection(final L2gatewayConnection input,
 187                                        final String l2GwDeviceName ,
 188                                        L2gateway l2Gateway) {
 189         LOG.info("Adding L2gateway Connection with ID: {}", input.key().getUuid());
 190
 191         Uuid networkUuid = input.getNetworkId();
 192
 193         // Taking cluster reboot scenario , if Elan instance is not available when l2GatewayConnection add events
 194         // comes we need to wait for elaninstance to resolve. Hence updating the map with the runnable .
 195         // When elanInstance add comes , it look in to the map and run the associated runnable associated with it.
 196         ElanInstance elanInstance = elanInstanceCache.get(networkUuid.getValue(),
 197             () -> addL2GatewayConnection(input, l2GwDeviceName)).orNull();
 198         if (elanInstance == null) {
 199             return;
 200         }
 201
 202         if (!isVxlanNetworkOrVxlanSegment(elanInstance)) {
 203             LOG.error("Neutron network with id {} is not VxlanNetwork", networkUuid.getValue());
 204         } else {
 205             Uuid l2GatewayId = input.getL2gatewayId();
 206             if (l2Gateway == null) {
 207                 l2Gateway = getNeutronL2gateway(broker, l2GatewayId);
 208             }
 209             if (l2Gateway == null) {
 210                 LOG.error("L2Gateway with id {} is not present", l2GatewayId.getValue());
 211             } else {
 212                 associateHwvtepsToElan(elanInstance, l2Gateway, input, l2GwDeviceName);
 213             }
 214         }
 215     }
 216
 217     public void deleteL2GatewayConnection(L2gatewayConnection input) {
 218         LOG.info("Deleting L2gateway Connection with ID: {}", input.key().getUuid());
 219
 220         Uuid networkUuid = input.getNetworkId();
 221         String elanName = networkUuid.getValue();
 222         disAssociateHwvtepsFromElan(elanName, input);
 223     }
 224
 225     private void disAssociateHwvtepsFromElan(String elanName, L2gatewayConnection input) {
 226         Integer defaultVlan = input.getSegmentId();
 227         List<L2GatewayDevice> l2Devices = ElanL2GwCacheUtils.getAllElanDevicesFromCache();
 228         List<Devices> l2gwDevicesToBeDeleted = new ArrayList<>();
 229         for (L2GatewayDevice elanL2gwDevice : l2Devices) {
 230             if (elanL2gwDevice.getL2GatewayIds().contains(input.key().getUuid())) {
 231                 l2gwDevicesToBeDeleted.addAll(elanL2gwDevice.getDevicesForL2gwConnectionId(input.key().getUuid()));
 232             }
 233         }
 234         if (l2gwDevicesToBeDeleted.isEmpty()) {
 235             //delete logical switch
 236             Uuid l2GatewayId = input.getL2gatewayId();
 237             L2gateway l2Gateway = L2GatewayConnectionUtils.getNeutronL2gateway(broker, l2GatewayId);
 238             if (l2Gateway == null) {
 239                 LOG.error("Failed to find the l2gateway for the connection {}", input.getUuid());
 240                 return;
 241             } else {
 242                 l2gwDevicesToBeDeleted.addAll(l2Gateway.getDevices());
 243             }
 244         }
 245         for (Devices l2Device : l2gwDevicesToBeDeleted) {
 246             String l2DeviceName = l2Device.getDeviceName();
 247             L2GatewayDevice l2GatewayDevice = l2GatewayCache.get(l2DeviceName);
 248             String hwvtepNodeId = l2GatewayDevice.getHwvtepNodeId();
 249             boolean isLastL2GwConnDeleted = false;
 250             L2GatewayDevice elanL2GwDevice = ElanL2GwCacheUtils.getL2GatewayDeviceFromCache(elanName, hwvtepNodeId);
 251             if (elanL2GwDevice != null && isLastL2GwConnBeingDeleted(elanL2GwDevice)) {
 252                 // Delete L2 Gateway device from 'ElanL2GwDevice' cache
 253                 LOG.debug("Elan L2Gw Conn cache removed for id {}", hwvtepNodeId);
 254                 ElanL2GwCacheUtils.removeL2GatewayDeviceFromCache(elanName, hwvtepNodeId);
 255                 isLastL2GwConnDeleted = true;
 256             } else {
 257                 Uuid l2GwConnId = input.key().getUuid();
 258                 LOG.debug("Elan L2Gw Conn cache with id {} is being referred by other L2Gw Conns; so only "
 259                         + "L2 Gw Conn {} reference is removed", hwvtepNodeId, l2GwConnId);
 260                 if (elanL2GwDevice != null) {
 261                     elanL2GwDevice.removeL2GatewayId(l2GwConnId);
 262                 } else {
 263                     isLastL2GwConnDeleted = true;
 264                 }
 265             }
 266
 267             DisAssociateHwvtepFromElanJob disAssociateHwvtepToElanJob =
 268                     new DisAssociateHwvtepFromElanJob(elanL2GatewayUtils, elanL2GatewayMulticastUtils,
 269                             elanL2GwDevice, elanName, () -> elanInstanceCache.get(elanName).orNull(),
 270                             l2Device, defaultVlan, hwvtepNodeId, isLastL2GwConnDeleted);
 271             elanClusterUtils.runOnlyInOwnerNode(disAssociateHwvtepToElanJob.getJobKey(), "remove l2gw connection job",
 272                     disAssociateHwvtepToElanJob);
 273         }
 274     }
 275
 276     private void associateHwvtepsToElan(ElanInstance elanInstance,
 277             L2gateway l2Gateway, L2gatewayConnection input, String l2GwDeviceName) {
 278         String elanName = elanInstance.getElanInstanceName();
 279         Integer defaultVlan = input.getSegmentId();
 280         Uuid l2GwConnId = input.key().getUuid();
 281         List<Devices> l2Devices = l2Gateway.getDevices();
 282
 283         LOG.trace("Associating ELAN {} with L2Gw Conn Id {} having below L2Gw devices {}", elanName, l2GwConnId,
 284                 l2Devices);
 285
 286         for (Devices l2Device : l2Devices) {
 287             String l2DeviceName = l2Device.getDeviceName();
 288             // L2gateway can have more than one L2 Gw devices. Configure Logical Switch, VLAN mappings,...
 289             // only on the switch which has come up just now and exclude all other devices from
 290             // preprovisioning/re-provisioning
 291             if (l2GwDeviceName != null && !l2GwDeviceName.equals(l2DeviceName)) {
 292                 LOG.debug("Associating Hwvtep to ELAN is not been processed for {}; as only {} got connected now!",
 293                         l2DeviceName, l2GwDeviceName);
 294                 continue;
 295             }
 296             L2GatewayDevice l2GatewayDevice = l2GatewayCache.get(l2DeviceName);
 297             if (isL2GwDeviceConnected(l2GatewayDevice)) {
 298                 NodeId hwvtepNodeId = new NodeId(l2GatewayDevice.getHwvtepNodeId());
 299
 300                 // Delete pending delete logical switch task if scheduled
 301                 elanL2GatewayUtils.cancelDeleteLogicalSwitch(hwvtepNodeId,
 302                         ElanL2GatewayUtils.getLogicalSwitchFromElan(elanName));
 303
 304                 // Add L2 Gateway device to 'ElanL2GwDevice' cache
 305                 boolean createLogicalSwitch;
 306                 LogicalSwitches logicalSwitch = HwvtepUtils.getLogicalSwitch(broker, LogicalDatastoreType.CONFIGURATION,
 307                         hwvtepNodeId, elanName);
 308                 if (logicalSwitch == null) {
 309                     HwvtepLogicalSwitchListener hwVTEPLogicalSwitchListener = new HwvtepLogicalSwitchListener(
 310                             elanInstanceCache, elanL2GatewayUtils, elanClusterUtils, elanL2GatewayMulticastUtils,
 311                             this, l2GatewayDevice, elanName, l2Device, defaultVlan, l2GwConnId, hwvtepNodeHACache);
 312                     hwVTEPLogicalSwitchListener.registerListener(LogicalDatastoreType.OPERATIONAL, broker);
 313                     closeables.add(hwVTEPLogicalSwitchListener);
 314                     createLogicalSwitch = true;
 315                 } else {
 316                     addL2DeviceToElanL2GwCache(elanName, l2GatewayDevice, l2GwConnId, l2Device);
 317                     createLogicalSwitch = false;
 318                 }
 319                 AssociateHwvtepToElanJob associateHwvtepToElanJob = new AssociateHwvtepToElanJob(broker,
 320                         elanL2GatewayUtils, elanL2GatewayMulticastUtils, elanInstanceCache, l2GatewayDevice,
 321                         elanInstance, l2Device, defaultVlan, createLogicalSwitch);
 322
 323                 elanClusterUtils.runOnlyInOwnerNode(associateHwvtepToElanJob.getJobKey(),
 324                         "create logical switch in hwvtep topo", associateHwvtepToElanJob);
 325
 326             } else {
 327                 LOG.info("L2GwConn create is not handled for device with id {} as it's not connected", l2DeviceName);
 328             }
 329         }
 330     }
 331
 332     public L2GatewayDevice addL2DeviceToElanL2GwCache(String elanName, L2GatewayDevice l2GatewayDevice, Uuid l2GwConnId,
 333             Devices l2Device) {
 334         String l2gwDeviceNodeId = l2GatewayDevice.getHwvtepNodeId();
 335         L2GatewayDevice elanL2GwDevice = ElanL2GwCacheUtils.getL2GatewayDeviceFromCache(elanName, l2gwDeviceNodeId);
 336         if (elanL2GwDevice == null) {
 337             elanL2GwDevice = new L2GatewayDevice(l2GatewayDevice.getDeviceName());
 338             elanL2GwDevice.setHwvtepNodeId(l2gwDeviceNodeId);
 339             elanL2GwDevice.setTunnelIps(l2GatewayDevice.getTunnelIps());
 340             ElanL2GwCacheUtils.addL2GatewayDeviceToCache(elanName, elanL2GwDevice);
 341             LOG.debug("Elan L2GwConn cache created for hwvtep id {}", l2gwDeviceNodeId);
 342         } else {
 343             LOG.debug("Elan L2GwConn cache already exists for hwvtep id {}; updating L2GwConn id {} to it",
 344                     l2gwDeviceNodeId, l2GwConnId);
 345         }
 346         elanL2GwDevice.addL2GatewayId(l2GwConnId);
 347         elanL2GwDevice.addL2gwConnectionIdToDevice(l2GwConnId, l2Device);
 348
 349         //incase of cluster reboot scenario southbound device would have added more macs
 350         //while odl is down, pull them now
 351         readAndCopyLocalUcastMacsToCache(elanName, l2GatewayDevice);
 352
 353         LOG.trace("Elan L2GwConn cache updated with below details: {}", elanL2GwDevice);
 354         return elanL2GwDevice;
 355     }
 356
 357     private static boolean isL2GwDeviceConnected(L2GatewayDevice l2GwDevice) {
 358         return l2GwDevice != null && l2GwDevice.getHwvtepNodeId() != null;
 359     }
 360
 361     protected static boolean isLastL2GwConnBeingDeleted(@Nonnull L2GatewayDevice l2GwDevice) {
 362         return l2GwDevice.getL2GatewayIds().size() == 1;
 363     }
 364
 365     private void readAndCopyLocalUcastMacsToCache(final String elanName, final L2GatewayDevice l2GatewayDevice) {
 366         final InstanceIdentifier<Node> nodeIid = HwvtepSouthboundUtils.createInstanceIdentifier(
 367                 new NodeId(l2GatewayDevice.getHwvtepNodeId()));
 368         jobCoordinator.enqueueJob(elanName + ":" + l2GatewayDevice.getDeviceName(), () -> {
 369             final SettableFuture settableFuture = SettableFuture.create();
 370             Futures.addCallback(broker.newReadOnlyTransaction().read(LogicalDatastoreType.OPERATIONAL,
 371                     nodeIid), new SettableFutureCallback<Optional<Node>>(settableFuture) {
 372                         @Override
 373                         public void onSuccess(@Nonnull Optional<Node> resultNode) {
 374                             LocalUcastMacListener localUcastMacListener =
 375                                     new LocalUcastMacListener(broker, haOpClusteredListener,
 376                                             elanL2GatewayUtils, jobCoordinator, elanInstanceCache, hwvtepNodeHACache);
 377                             settableFuture.set(resultNode);
 378                             Optional<Node> nodeOptional = resultNode;
 379                             if (nodeOptional.isPresent()) {
 380                                 Node node = nodeOptional.get();
 381                                 if (node.augmentation(HwvtepGlobalAugmentation.class) != null) {
 382                                     List<LocalUcastMacs> localUcastMacs =
 383                                             node.augmentation(HwvtepGlobalAugmentation.class).getLocalUcastMacs();
 384                                     if (localUcastMacs == null) {
 385                                         return;
 386                                     }
 387                                     localUcastMacs.stream()
 388                                             .filter((mac) -> macBelongsToLogicalSwitch(mac, elanName))
 389                                             .forEach((mac) -> {
 390                                                 InstanceIdentifier<LocalUcastMacs> macIid = getMacIid(nodeIid, mac);
 391                                                 localUcastMacListener.added(macIid, mac);
 392                                             });
 393                                 }
 394                             }
 395                         }
 396                     }, MoreExecutors.directExecutor());
 397             return Lists.newArrayList(settableFuture);
 398         } , 5);
 399     }
 400
 401     /**
 402      * Gets the associated l2 gw connections.
 403      *
 404      * @param l2GatewayId the l2 gateway id
 405      *
 406      * @return the associated l2 gw connections
 407      */
 408     public List<L2gatewayConnection> getL2GwConnectionsByL2GatewayId(Uuid l2GatewayId) {
 409         List<L2gatewayConnection> l2GwConnections = new ArrayList<>();
 410         List<L2gatewayConnection> allL2GwConns = getAllL2gatewayConnections(broker);
 411         for (L2gatewayConnection l2GwConn : allL2GwConns) {
 412             if (l2GwConn.getL2gatewayId().equals(l2GatewayId)) {
 413                 l2GwConnections.add(l2GwConn);
 414             }
 415         }
 416         return l2GwConnections;
 417     }
 418
 419     private static boolean macBelongsToLogicalSwitch(LocalUcastMacs mac, String logicalSwitchName) {
 420         InstanceIdentifier<LogicalSwitches> iid = (InstanceIdentifier<LogicalSwitches>)
 421                 mac.getLogicalSwitchRef().getValue();
 422         return iid.firstKeyOf(LogicalSwitches.class).getHwvtepNodeName().getValue().equals(logicalSwitchName);
 423     }
 424
 425     static InstanceIdentifier<LocalUcastMacs> getMacIid(InstanceIdentifier<Node> nodeIid, LocalUcastMacs mac) {
 426         return nodeIid.augmentation(HwvtepGlobalAugmentation.class).child(LocalUcastMacs.class, mac.key());
 427     }
 428 }