elanmanager/impl/src/main/java/org/opendaylight/netvirt/elan/evpn/utils/EvpnUtils.java

   1 /*
   2  * Copyright © 2017 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.elan.evpn.utils;
   9
  10 import static org.opendaylight.genius.infra.Datastore.CONFIGURATION;
  11
  12 import com.google.common.base.Optional;
  13 import com.google.common.util.concurrent.Futures;
  14 import com.google.common.util.concurrent.MoreExecutors;
  15 import com.google.common.util.concurrent.SettableFuture;
  16 import java.math.BigInteger;
  17 import java.util.ArrayList;
  18 import java.util.Collections;
  19 import java.util.List;
  20 import java.util.concurrent.ExecutionException;
  21 import java.util.concurrent.Future;
  22 import java.util.function.BiConsumer;
  23 import java.util.function.BiPredicate;
  24 import java.util.function.Function;
  25 import java.util.function.Predicate;
  26 import javax.annotation.Nullable;
  27 import javax.inject.Inject;
  28 import javax.inject.Singleton;
  29 import org.opendaylight.controller.md.sal.binding.api.DataBroker;
  30 import org.opendaylight.controller.md.sal.binding.api.ReadOnlyTransaction;
  31 import org.opendaylight.controller.md.sal.binding.api.WriteTransaction;
  32 import org.opendaylight.controller.md.sal.common.api.data.LogicalDatastoreType;
  33 import org.opendaylight.controller.md.sal.common.api.data.ReadFailedException;
  34 import org.opendaylight.genius.infra.ManagedNewTransactionRunner;
  35 import org.opendaylight.genius.infra.ManagedNewTransactionRunnerImpl;
  36 import org.opendaylight.genius.interfacemanager.globals.InterfaceInfo;
  37 import org.opendaylight.genius.interfacemanager.interfaces.IInterfaceManager;
  38 import org.opendaylight.genius.itm.globals.ITMConstants;
  39 import org.opendaylight.genius.mdsalutil.FlowEntity;
  40 import org.opendaylight.genius.mdsalutil.InstructionInfo;
  41 import org.opendaylight.genius.mdsalutil.MDSALUtil;
  42 import org.opendaylight.genius.mdsalutil.MatchInfo;
  43 import org.opendaylight.genius.mdsalutil.NWUtil;
  44 import org.opendaylight.genius.mdsalutil.NwConstants;
  45 import org.opendaylight.genius.mdsalutil.instructions.InstructionGotoTable;
  46 import org.opendaylight.genius.mdsalutil.instructions.InstructionWriteMetadata;
  47 import org.opendaylight.genius.mdsalutil.matches.MatchTunnelId;
  48 import org.opendaylight.genius.utils.ServiceIndex;
  49 import org.opendaylight.infrautils.jobcoordinator.JobCoordinator;
  50 import org.opendaylight.infrautils.utils.concurrent.ListenableFutures;
  51 import org.opendaylight.netvirt.bgpmanager.api.IBgpManager;
  52 import org.opendaylight.netvirt.elan.cache.ElanInstanceCache;
  53 import org.opendaylight.netvirt.elan.l2gw.utils.SettableFutureCallback;
  54 import org.opendaylight.netvirt.elan.utils.ElanConstants;
  55 import org.opendaylight.netvirt.elan.utils.ElanUtils;
  56 import org.opendaylight.netvirt.elanmanager.api.ElanHelper;
  57 import org.opendaylight.netvirt.vpnmanager.api.IVpnManager;
  58 import org.opendaylight.yang.gen.v1.urn.huawei.params.xml.ns.yang.l3vpn.rev140815.vpn.instances.VpnInstance;
  59 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.inet.types.rev130715.IpAddress;
  60 import org.opendaylight.yang.gen.v1.urn.opendaylight.flow.types.rev131026.instruction.list.Instruction;
  61 import org.opendaylight.yang.gen.v1.urn.opendaylight.genius.interfacemanager.servicebinding.rev160406.service.bindings.services.info.BoundServices;
  62 import org.opendaylight.yang.gen.v1.urn.opendaylight.genius.itm.op.rev160406.ExternalTunnelList;
  63 import org.opendaylight.yang.gen.v1.urn.opendaylight.genius.itm.op.rev160406.external.tunnel.list.ExternalTunnel;
  64 import org.opendaylight.yang.gen.v1.urn.opendaylight.genius.itm.rev160406.DcGatewayIpList;
  65 import org.opendaylight.yang.gen.v1.urn.opendaylight.genius.itm.rev160406.dc.gateway.ip.list.DcGatewayIp;
  66 import org.opendaylight.yang.gen.v1.urn.opendaylight.genius.itm.rpcs.rev160406.GetDpnEndpointIpsInputBuilder;
  67 import org.opendaylight.yang.gen.v1.urn.opendaylight.genius.itm.rpcs.rev160406.GetDpnEndpointIpsOutput;
  68 import org.opendaylight.yang.gen.v1.urn.opendaylight.genius.itm.rpcs.rev160406.ItmRpcService;
  69 import org.opendaylight.yang.gen.v1.urn.opendaylight.netvirt.elan.rev150602.EvpnAugmentation;
  70 import org.opendaylight.yang.gen.v1.urn.opendaylight.netvirt.elan.rev150602.elan.instances.ElanInstance;
  71 import org.opendaylight.yang.gen.v1.urn.opendaylight.netvirt.elan.rev150602.forwarding.entries.MacEntry;
  72 import org.opendaylight.yang.gen.v1.urn.opendaylight.netvirt.fibmanager.rev150330.VrfEntryBase;
  73 import org.opendaylight.yang.gen.v1.urn.opendaylight.netvirt.neutronvpn.rev150602.neutron.vpn.portip.port.data.VpnPortipToPort;
  74 import org.opendaylight.yangtools.yang.binding.DataObject;
  75 import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
  76 import org.opendaylight.yangtools.yang.common.RpcResult;
  77 import org.slf4j.Logger;
  78 import org.slf4j.LoggerFactory;
  79
  80 @Singleton
  81 public class EvpnUtils {
  82
  83     private static final Logger LOG = LoggerFactory.getLogger(EvpnUtils.class);
  84
  85     private final BiPredicate<String, String> isNetAttach = (var1, var2) -> (var1 == null && var2 != null);
  86     private final BiPredicate<String, String> isNetDetach = (var1, var2) -> (var1 != null && var2 == null);
  87     private final Predicate<MacEntry> isIpv4PrefixAvailable = (macEntry) -> (macEntry != null
  88         && macEntry.getIpPrefix() != null && macEntry.getIpPrefix().getIpv4Address() != null);
  89     private final DataBroker broker;
  90     private final ManagedNewTransactionRunner txRunner;
  91     private final IInterfaceManager interfaceManager;
  92     private final ElanUtils elanUtils;
  93     private final ItmRpcService itmRpcService;
  94     private final JobCoordinator jobCoordinator;
  95     private final IBgpManager bgpManager;
  96     private final IVpnManager vpnManager;
  97     private final ElanInstanceCache elanInstanceCache;
  98
  99     @Inject
 100     public EvpnUtils(DataBroker broker, IInterfaceManager interfaceManager, ElanUtils elanUtils,
 101             ItmRpcService itmRpcService, IVpnManager vpnManager, IBgpManager bgpManager,
 102             JobCoordinator jobCoordinator, ElanInstanceCache elanInstanceCache) {
 103         this.broker = broker;
 104         this.txRunner = new ManagedNewTransactionRunnerImpl(broker);
 105         this.interfaceManager = interfaceManager;
 106         this.elanUtils = elanUtils;
 107         this.itmRpcService = itmRpcService;
 108         this.vpnManager = vpnManager;
 109         this.bgpManager = bgpManager;
 110         this.jobCoordinator = jobCoordinator;
 111         this.elanInstanceCache = elanInstanceCache;
 112     }
 113
 114     public boolean isWithdrawEvpnRT2Routes(ElanInstance original, ElanInstance update) {
 115         return isNetDetach.test(getEvpnNameFromElan(original), getEvpnNameFromElan(update));
 116     }
 117
 118     public boolean isAdvertiseEvpnRT2Routes(ElanInstance original, ElanInstance update) {
 119         return isNetAttach.test(getEvpnNameFromElan(original), getEvpnNameFromElan(update));
 120     }
 121
 122     @SuppressWarnings("checkstyle:IllegalCatch")
 123     public void advertiseEvpnRT2Routes(EvpnAugmentation evpnAugmentation, String elanName)  {
 124         if (evpnAugmentation == null || evpnAugmentation.getEvpnName() == null) {
 125             return;
 126         }
 127         String evpnName = evpnAugmentation.getEvpnName();
 128         List<MacEntry> macEntries = elanUtils.getElanMacEntries(elanName);
 129         if (macEntries == null || macEntries.isEmpty()) {
 130             LOG.trace("advertiseEvpnRT2Routes no elan mac entries found for {}", elanName);
 131             return;
 132         }
 133         String rd = vpnManager.getVpnRd(broker, evpnName);
 134         ElanInstance elanInfo = elanInstanceCache.get(elanName).orNull();
 135         macEntries.stream().filter(isIpv4PrefixAvailable).forEach(macEntry -> {
 136             InterfaceInfo interfaceInfo = interfaceManager.getInterfaceInfo(macEntry.getInterface());
 137             if (interfaceInfo == null) {
 138                 LOG.debug("advertiseEvpnRT2Routes, interfaceInfo is null for interface {}", macEntry.getInterface());
 139                 return;
 140             }
 141             advertisePrefix(elanInfo, rd, macEntry.getMacAddress().getValue(),
 142                     macEntry.getIpPrefix().getIpv4Address().getValue(),
 143                     interfaceInfo.getInterfaceName(), interfaceInfo.getDpId());
 144         });
 145     }
 146
 147     @Nullable
 148     public String getEndpointIpAddressForDPN(BigInteger dpnId) {
 149
 150         Future<RpcResult<GetDpnEndpointIpsOutput>> result = itmRpcService.getDpnEndpointIps(
 151                 new GetDpnEndpointIpsInputBuilder()
 152                         .setSourceDpid(dpnId)
 153                         .build());
 154         RpcResult<GetDpnEndpointIpsOutput> rpcResult = null;
 155         try {
 156             rpcResult = result.get();
 157         } catch (InterruptedException e) {
 158             LOG.error("getnextHopIpFromRpcOutput : InterruptedException for dpnid {}", dpnId, e);
 159             return null;
 160         } catch (ExecutionException e) {
 161             LOG.error("getnextHopIpFromRpcOutput : ExecutionException for dpnid {}", dpnId, e);
 162             return null;
 163         }
 164         if (!rpcResult.isSuccessful()) {
 165             LOG.warn("RPC Call to getDpnEndpointIps returned with Errors {}", rpcResult.getErrors());
 166             return null;
 167         }
 168
 169         List<IpAddress> nexthopIpList = rpcResult.getResult().getNexthopipList();
 170         return nexthopIpList.get(0).getIpv4Address().getValue();
 171     }
 172
 173     public Optional<String> getGatewayMacAddressForInterface(String vpnName,
 174                                                                                     String ifName, String ipAddress) {
 175         VpnPortipToPort gwPort = vpnManager.getNeutronPortFromVpnPortFixedIp(broker, vpnName, ipAddress);
 176         return Optional.of(gwPort != null && gwPort.isSubnetIp()
 177                 ? gwPort.getMacAddress()
 178                 : interfaceManager.getInterfaceInfoFromOperationalDataStore(ifName).getMacAddress());
 179     }
 180
 181     @Nullable
 182     public String getL3vpnNameFromElan(ElanInstance elanInfo) {
 183         if (elanInfo == null) {
 184             LOG.debug("getL3vpnNameFromElan :elanInfo is NULL");
 185             return null;
 186         }
 187         EvpnAugmentation evpnAugmentation = elanInfo.augmentation(EvpnAugmentation.class);
 188         return evpnAugmentation != null ? evpnAugmentation.getL3vpnName() : null;
 189     }
 190
 191     @Nullable
 192     public static String getEvpnNameFromElan(ElanInstance elanInfo) {
 193         if (elanInfo == null) {
 194             LOG.debug("getEvpnNameFromElan :elanInfo is NULL");
 195             return null;
 196         }
 197         EvpnAugmentation evpnAugmentation = elanInfo.augmentation(EvpnAugmentation.class);
 198         return evpnAugmentation != null ? evpnAugmentation.getEvpnName() : null;
 199     }
 200
 201     @Nullable
 202     public String getEvpnRd(ElanInstance elanInfo) {
 203         String evpnName = getEvpnNameFromElan(elanInfo);
 204         if (evpnName == null) {
 205             LOG.debug("getEvpnRd : evpnName is NULL for elanInfo {}", elanInfo);
 206             return null;
 207         }
 208         return vpnManager.getVpnRd(broker, evpnName);
 209     }
 210
 211     public void advertisePrefix(ElanInstance elanInfo, String macAddress, String prefix,
 212                                  String interfaceName, BigInteger dpnId) {
 213         String rd = getEvpnRd(elanInfo);
 214         advertisePrefix(elanInfo, rd, macAddress, prefix, interfaceName, dpnId);
 215     }
 216
 217     @SuppressWarnings("checkstyle:IllegalCatch")
 218     public void advertisePrefix(ElanInstance elanInfo, String rd,
 219                                  String macAddress, String prefix, String interfaceName, BigInteger dpnId) {
 220         if (rd == null) {
 221             LOG.debug("advertisePrefix : rd is NULL for elanInfo {}, macAddress {}", elanInfo, macAddress);
 222             return;
 223         }
 224         String nextHop = getEndpointIpAddressForDPN(dpnId);
 225         if (nextHop == null) {
 226             LOG.debug("Failed to get the dpn tep ip for dpn {}", dpnId);
 227             return;
 228         }
 229         int vpnLabel = 0;
 230         long l2vni = elanUtils.getVxlanSegmentationId(elanInfo);
 231         long l3vni = 0;
 232         String gatewayMacAddr = null;
 233         String l3VpName = getL3vpnNameFromElan(elanInfo);
 234         if (l3VpName != null) {
 235             VpnInstance l3VpnInstance = vpnManager.getVpnInstance(broker, l3VpName);
 236             l3vni = l3VpnInstance.getL3vni();
 237             com.google.common.base.Optional<String> gatewayMac = getGatewayMacAddressForInterface(l3VpName,
 238                     interfaceName, prefix);
 239             gatewayMacAddr = gatewayMac.isPresent() ? gatewayMac.get() : null;
 240
 241         }
 242         LOG.info("Advertising routes with rd {},  macAddress {}, prefix {}, nextHop {},"
 243                         + " vpnLabel {}, l3vni {}, l2vni {}, gatewayMac {}", rd, macAddress, prefix, nextHop,
 244                 vpnLabel, l3vni, l2vni, gatewayMacAddr);
 245         try {
 246             bgpManager.advertisePrefix(rd, macAddress, prefix, nextHop,
 247                     VrfEntryBase.EncapType.Vxlan, vpnLabel, l3vni, l2vni, gatewayMacAddr);
 248         } catch (Exception e) {
 249             LOG.error("Failed to advertisePrefix", e);
 250         }
 251     }
 252
 253     public void advertisePrefix(ElanInstance elanInfo, MacEntry macEntry) {
 254         InterfaceInfo interfaceInfo = interfaceManager.getInterfaceInfo(macEntry.getInterface());
 255         if (interfaceInfo == null) {
 256             LOG.debug("advertisePrefix, interfaceInfo is null for interface {}", macEntry.getInterface());
 257             return;
 258         }
 259
 260         if (!isIpv4PrefixAvailable.test(macEntry)) {
 261             LOG.debug("advertisePrefix macEntry does not have IPv4 prefix {}", macEntry);
 262             return;
 263         }
 264         advertisePrefix(elanInfo, macEntry.getMacAddress().getValue(),
 265                 macEntry.getIpPrefix().getIpv4Address().getValue(),
 266                 interfaceInfo.getInterfaceName(), interfaceInfo.getDpId());
 267     }
 268
 269     public void withdrawEvpnRT2Routes(EvpnAugmentation evpnAugmentation, String elanName) {
 270         if (evpnAugmentation == null || evpnAugmentation.getEvpnName() == null) {
 271             LOG.trace("withdrawEvpnRT2Routes, evpnAugmentation is null");
 272             return;
 273         }
 274
 275         String evpnName = evpnAugmentation.getEvpnName();
 276         String rd = vpnManager.getVpnRd(broker, evpnName);
 277         if (rd == null) {
 278             LOG.debug("withdrawEvpnRT2Routes : rd is null for {}", elanName);
 279             return;
 280         }
 281         List<MacEntry> macEntries = elanUtils.getElanMacEntries(elanName);
 282         if (macEntries == null || macEntries.isEmpty()) {
 283             LOG.debug("withdrawEvpnRT2Routes : macEntries  is empty for elan {} ", elanName);
 284             return;
 285         }
 286         for (MacEntry macEntry : macEntries) {
 287             if (!isIpv4PrefixAvailable.test(macEntry)) {
 288                 LOG.debug("withdrawEvpnRT2Routes macEntry does not have IPv4 prefix {}", macEntry);
 289                 continue;
 290             }
 291             String prefix = macEntry.getIpPrefix().getIpv4Address().getValue();
 292             LOG.info("Withdrawing routes with rd {}, prefix {}", rd, prefix);
 293             bgpManager.withdrawPrefix(rd, prefix);
 294         }
 295     }
 296
 297     public void withdrawPrefix(ElanInstance elanInfo, String prefix) {
 298         String rd = getEvpnRd(elanInfo);
 299         if (rd == null) {
 300             return;
 301         }
 302         bgpManager.withdrawPrefix(rd, prefix);
 303     }
 304
 305     public void withdrawPrefix(ElanInstance elanInfo, MacEntry macEntry) {
 306         if (!isIpv4PrefixAvailable.test(macEntry)) {
 307             LOG.debug("withdrawPrefix macEntry does not have IPv4 prefix {}", macEntry);
 308             return;
 309         }
 310         withdrawPrefix(elanInfo, macEntry.getIpPrefix().getIpv4Address().getValue());
 311     }
 312
 313     public static InstanceIdentifier<ExternalTunnelList> getExternaTunnelListIdentifier() {
 314         return InstanceIdentifier
 315                 .builder(ExternalTunnelList.class).build();
 316     }
 317
 318     public Optional<ExternalTunnelList> getExternalTunnelList() {
 319         InstanceIdentifier<ExternalTunnelList> externalTunnelListId = getExternaTunnelListIdentifier();
 320         ExternalTunnelList externalTunnelList = null;
 321         try {
 322             externalTunnelList = elanUtils.read2(LogicalDatastoreType.CONFIGURATION,
 323                     externalTunnelListId).orNull();
 324         } catch (ReadFailedException e) {
 325             LOG.error("getExternalTunnelList: unable to read ExternalTunnelList, exception ", e);
 326         }
 327         return Optional.fromNullable(externalTunnelList);
 328     }
 329
 330     public static InstanceIdentifier<DcGatewayIpList> getDcGatewayIpListIdentifier() {
 331         return InstanceIdentifier
 332                 .builder(DcGatewayIpList.class).build();
 333     }
 334
 335     public Optional<DcGatewayIpList> getDcGatewayIpList() {
 336         InstanceIdentifier<DcGatewayIpList> dcGatewayIpListInstanceIdentifier = getDcGatewayIpListIdentifier();
 337         DcGatewayIpList dcGatewayIpListConfig = null;
 338         try {
 339             dcGatewayIpListConfig = elanUtils.read2(LogicalDatastoreType.CONFIGURATION,
 340                     dcGatewayIpListInstanceIdentifier).orNull();
 341         } catch (ReadFailedException e) {
 342             LOG.error("getDcGatewayTunnelInterfaceNameList: unable to read DcGatewayTunnelList, exception ", e);
 343         }
 344         return Optional.fromNullable(dcGatewayIpListConfig);
 345     }
 346
 347     public List<String> getDcGatewayTunnelInterfaceNameList() {
 348         final List<String> tunnelInterfaceNameList = new ArrayList<>();
 349         Optional<DcGatewayIpList> dcGatewayIpListOptional = getDcGatewayIpList();
 350         if (!dcGatewayIpListOptional.isPresent()) {
 351             LOG.info("No DC gateways configured while programming the l2vni table.");
 352             return tunnelInterfaceNameList;
 353         }
 354         List<DcGatewayIp> dcGatewayIps = dcGatewayIpListOptional.get().nonnullDcGatewayIp();
 355
 356         Optional<ExternalTunnelList> externalTunnelListOptional = getExternalTunnelList();
 357         if (!externalTunnelListOptional.isPresent()) {
 358             LOG.info("No External Tunnel Configured while programming the l2vni table.");
 359             return tunnelInterfaceNameList;
 360         }
 361         List<ExternalTunnel> externalTunnels = externalTunnelListOptional.get().nonnullExternalTunnel();
 362
 363         dcGatewayIps.forEach(dcIp -> externalTunnels
 364                 .stream()
 365                 .filter(externalTunnel -> externalTunnel.getDestinationDevice()
 366                         .contains(dcIp.getIpAddress().getIpv4Address().toString()))
 367                 .forEach(externalTunnel -> tunnelInterfaceNameList.add(externalTunnel.getTunnelInterfaceName())));
 368
 369         return tunnelInterfaceNameList;
 370     }
 371
 372     public void bindElanServiceToExternalTunnel(String elanName, String interfaceName) {
 373         ListenableFutures.addErrorLogging(txRunner.callWithNewReadWriteTransactionAndSubmit(CONFIGURATION, tx -> {
 374             int instructionKey = 0;
 375             LOG.trace("Binding external interface {} elan {}", interfaceName, elanName);
 376             List<Instruction> instructions = new ArrayList<>();
 377             instructions.add(MDSALUtil.buildAndGetGotoTableInstruction(
 378                     NwConstants.L2VNI_EXTERNAL_TUNNEL_DEMUX_TABLE, ++instructionKey));
 379             short elanServiceIndex =
 380                     ServiceIndex.getIndex(NwConstants.ELAN_SERVICE_NAME, NwConstants.ELAN_SERVICE_INDEX);
 381             BoundServices serviceInfo = ElanUtils.getBoundServices(
 382                     ElanUtils.getElanServiceName(elanName, interfaceName), elanServiceIndex,
 383                     NwConstants.ELAN_SERVICE_INDEX, NwConstants.COOKIE_ELAN_INGRESS_TABLE, instructions);
 384             InstanceIdentifier<BoundServices> bindServiceId = ElanUtils.buildServiceId(interfaceName, elanServiceIndex);
 385             if (!tx.read(bindServiceId).get().isPresent()) {
 386                 tx.put(bindServiceId, serviceInfo, WriteTransaction.CREATE_MISSING_PARENTS);
 387             }
 388         }), LOG, "Error binding an ELAN service to an external tunnel");
 389     }
 390
 391     public void unbindElanServiceFromExternalTunnel(String elanName, String interfaceName) {
 392         ListenableFutures.addErrorLogging(txRunner.callWithNewReadWriteTransactionAndSubmit(CONFIGURATION, tx -> {
 393             LOG.trace("UnBinding external interface {} elan {}", interfaceManager, elanName);
 394             short elanServiceIndex =
 395                     ServiceIndex.getIndex(NwConstants.ELAN_SERVICE_NAME, NwConstants.ELAN_SERVICE_INDEX);
 396             InstanceIdentifier<BoundServices> bindServiceId = ElanUtils.buildServiceId(interfaceName, elanServiceIndex);
 397             if (tx.read(bindServiceId).get().isPresent()) {
 398                 tx.delete(bindServiceId);
 399             }
 400         }), LOG, "Error binding an ELAN service to an external tunnel");
 401     }
 402
 403     private List<InstructionInfo> getInstructionsForExtTunnelTable(Long elanTag) {
 404         List<InstructionInfo> mkInstructions = new ArrayList<>();
 405         mkInstructions.add(new InstructionWriteMetadata(ElanUtils.getElanMetadataLabel(elanTag, false),
 406                 ElanHelper.getElanMetadataMask()));
 407         mkInstructions.add(new InstructionGotoTable(NwConstants.ELAN_DMAC_TABLE));
 408         return mkInstructions;
 409     }
 410
 411     private String getFlowRef(long tableId, long elanTag, BigInteger dpnId) {
 412         return new StringBuilder().append(tableId).append(elanTag).append(dpnId).toString();
 413     }
 414
 415     private void programEvpnL2vniFlow(ElanInstance elanInfo, BiConsumer<BigInteger, FlowEntity> flowHandler) {
 416         long elanTag = elanInfo.getElanTag();
 417         List<MatchInfo> mkMatches = new ArrayList<>();
 418         mkMatches.add(new MatchTunnelId(BigInteger.valueOf(elanUtils.getVxlanSegmentationId(elanInfo))));
 419         NWUtil.getOperativeDPNs(broker).forEach(dpnId -> {
 420             LOG.debug("Updating tunnel flow to dpnid {}", dpnId);
 421             List<InstructionInfo> instructions = getInstructionsForExtTunnelTable(elanTag);
 422             String flowRef = getFlowRef(NwConstants.L2VNI_EXTERNAL_TUNNEL_DEMUX_TABLE, elanTag, dpnId);
 423             FlowEntity flowEntity = MDSALUtil.buildFlowEntity(
 424                     dpnId,
 425                     NwConstants.L2VNI_EXTERNAL_TUNNEL_DEMUX_TABLE,
 426                     flowRef,
 427                     5, // prio
 428                     elanInfo.getElanInstanceName(), // flowName
 429                     0, // idleTimeout
 430                     0, // hardTimeout
 431                     ITMConstants.COOKIE_ITM_EXTERNAL.add(BigInteger.valueOf(elanTag)),
 432                     mkMatches,
 433                     instructions);
 434             flowHandler.accept(dpnId, flowEntity);
 435         });
 436     }
 437
 438     public void programEvpnL2vniDemuxTable(String elanName, final BiConsumer<String, String> serviceHandler,
 439                                            BiConsumer<BigInteger, FlowEntity> flowHandler) {
 440         ElanInstance elanInfo = elanInstanceCache.get(elanName).orNull();
 441         List<String> tunnelInterfaceNameList = getDcGatewayTunnelInterfaceNameList();
 442         if (tunnelInterfaceNameList.isEmpty()) {
 443             LOG.info("No DC gateways tunnels while programming l2vni table for elan {}.", elanName);
 444             return;
 445         }
 446
 447         tunnelInterfaceNameList.forEach(tunnelInterfaceName -> serviceHandler.accept(elanName, tunnelInterfaceName));
 448         programEvpnL2vniFlow(elanInfo, flowHandler);
 449     }
 450
 451     @SuppressWarnings({ "unchecked", "rawtypes" })
 452     public <T extends DataObject> void asyncReadAndExecute(final LogicalDatastoreType datastoreType,
 453             final InstanceIdentifier<T> iid, final String jobKey, final Function<Optional<T>, Void> function) {
 454         jobCoordinator.enqueueJob(jobKey, () -> {
 455             SettableFuture<Optional<T>> settableFuture = SettableFuture.create();
 456             List futures = Collections.singletonList(settableFuture);
 457
 458             try (ReadOnlyTransaction tx = broker.newReadOnlyTransaction()) {
 459                 Futures.addCallback(tx.read(datastoreType, iid),
 460                         new SettableFutureCallback<Optional<T>>(settableFuture) {
 461                             @Override
 462                             public void onSuccess(Optional<T> data) {
 463                                 function.apply(data);
 464                                 super.onSuccess(data);
 465                             }
 466                         }, MoreExecutors.directExecutor());
 467
 468                 return futures;
 469             }
 470         }, ElanConstants.JOB_MAX_RETRIES);
 471     }
 472 }