fibmanager/impl/src/main/java/org/opendaylight/netvirt/fibmanager/FibUtil.java

   1 /*
   2  * Copyright © 2016, 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
   9 package org.opendaylight.netvirt.fibmanager;
  10
  11 import static java.util.stream.Collectors.joining;
  12 import static java.util.stream.Collectors.toList;
  13 import static org.opendaylight.controller.md.sal.binding.api.WriteTransaction.CREATE_MISSING_PARENTS;
  14
  15 import com.google.common.base.Optional;
  16 import com.google.common.base.Preconditions;
  17 import com.google.common.net.InetAddresses;
  18 import java.math.BigInteger;
  19 import java.net.InetAddress;
  20 import java.util.ArrayList;
  21 import java.util.Collections;
  22 import java.util.List;
  23 import java.util.Objects;
  24 import java.util.concurrent.ExecutionException;
  25 import java.util.concurrent.Future;
  26 import java.util.concurrent.locks.ReentrantLock;
  27 import javax.annotation.Nullable;
  28 import javax.inject.Inject;
  29 import javax.inject.Singleton;
  30 import org.opendaylight.controller.md.sal.binding.api.DataBroker;
  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.datastoreutils.SingleTransactionDataBroker;
  35 import org.opendaylight.genius.infra.Datastore.Configuration;
  36 import org.opendaylight.genius.infra.Datastore.Operational;
  37 import org.opendaylight.genius.infra.TypedReadTransaction;
  38 import org.opendaylight.genius.infra.TypedReadWriteTransaction;
  39 import org.opendaylight.genius.infra.TypedWriteTransaction;
  40 import org.opendaylight.genius.itm.api.IITMProvider;
  41 import org.opendaylight.genius.mdsalutil.BucketInfo;
  42 import org.opendaylight.genius.mdsalutil.MDSALUtil;
  43 import org.opendaylight.genius.mdsalutil.NWUtil;
  44 import org.opendaylight.genius.mdsalutil.NwConstants;
  45 import org.opendaylight.genius.utils.JvmGlobalLocks;
  46 import org.opendaylight.netvirt.elanmanager.api.IElanService;
  47 import org.opendaylight.netvirt.fibmanager.NexthopManager.AdjacencyResult;
  48 import org.opendaylight.netvirt.fibmanager.api.FibHelper;
  49 import org.opendaylight.netvirt.fibmanager.api.RouteOrigin;
  50 import org.opendaylight.netvirt.vpnmanager.api.VpnExtraRouteHelper;
  51 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.iana._if.type.rev170119.Tunnel;
  52 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.interfaces.rev140508.InterfacesState;
  53 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.interfaces.rev140508.interfaces.state.Interface;
  54 import org.opendaylight.yang.gen.v1.urn.opendaylight.flow.inventory.rev130819.FlowCapableNode;
  55 import org.opendaylight.yang.gen.v1.urn.opendaylight.genius.idmanager.rev160406.IdManagerService;
  56 import org.opendaylight.yang.gen.v1.urn.opendaylight.genius.idmanager.rev160406.ReleaseIdInput;
  57 import org.opendaylight.yang.gen.v1.urn.opendaylight.genius.idmanager.rev160406.ReleaseIdInputBuilder;
  58 import org.opendaylight.yang.gen.v1.urn.opendaylight.genius.idmanager.rev160406.ReleaseIdOutput;
  59 import org.opendaylight.yang.gen.v1.urn.opendaylight.genius.itm.op.rev160406.DpnEndpoints;
  60 import org.opendaylight.yang.gen.v1.urn.opendaylight.genius.itm.op.rev160406.dpn.endpoints.DPNTEPsInfo;
  61 import org.opendaylight.yang.gen.v1.urn.opendaylight.genius.itm.op.rev160406.dpn.endpoints.DPNTEPsInfoKey;
  62 import org.opendaylight.yang.gen.v1.urn.opendaylight.genius.itm.op.rev160406.dpn.endpoints.dpn.teps.info.TunnelEndPoints;
  63 import org.opendaylight.yang.gen.v1.urn.opendaylight.genius.itm.op.rev160406.tunnels_state.StateTunnelList;
  64 import org.opendaylight.yang.gen.v1.urn.opendaylight.genius.lockmanager.rev160413.LockManagerService;
  65 import org.opendaylight.yang.gen.v1.urn.opendaylight.genius.lockmanager.rev160413.TimeUnits;
  66 import org.opendaylight.yang.gen.v1.urn.opendaylight.genius.lockmanager.rev160413.TryLockInput;
  67 import org.opendaylight.yang.gen.v1.urn.opendaylight.genius.lockmanager.rev160413.TryLockInputBuilder;
  68 import org.opendaylight.yang.gen.v1.urn.opendaylight.genius.lockmanager.rev160413.TryLockOutput;
  69 import org.opendaylight.yang.gen.v1.urn.opendaylight.genius.lockmanager.rev160413.UnlockInput;
  70 import org.opendaylight.yang.gen.v1.urn.opendaylight.genius.lockmanager.rev160413.UnlockInputBuilder;
  71 import org.opendaylight.yang.gen.v1.urn.opendaylight.genius.lockmanager.rev160413.UnlockOutput;
  72 import org.opendaylight.yang.gen.v1.urn.opendaylight.group.types.rev131018.BucketId;
  73 import org.opendaylight.yang.gen.v1.urn.opendaylight.group.types.rev131018.GroupId;
  74 import org.opendaylight.yang.gen.v1.urn.opendaylight.group.types.rev131018.group.Buckets;
  75 import org.opendaylight.yang.gen.v1.urn.opendaylight.group.types.rev131018.group.BucketsBuilder;
  76 import org.opendaylight.yang.gen.v1.urn.opendaylight.group.types.rev131018.group.buckets.Bucket;
  77 import org.opendaylight.yang.gen.v1.urn.opendaylight.group.types.rev131018.group.buckets.BucketBuilder;
  78 import org.opendaylight.yang.gen.v1.urn.opendaylight.group.types.rev131018.groups.Group;
  79 import org.opendaylight.yang.gen.v1.urn.opendaylight.group.types.rev131018.groups.GroupKey;
  80 import org.opendaylight.yang.gen.v1.urn.opendaylight.inventory.rev130819.NodeId;
  81 import org.opendaylight.yang.gen.v1.urn.opendaylight.inventory.rev130819.NodeRef;
  82 import org.opendaylight.yang.gen.v1.urn.opendaylight.inventory.rev130819.Nodes;
  83 import org.opendaylight.yang.gen.v1.urn.opendaylight.inventory.rev130819.nodes.Node;
  84 import org.opendaylight.yang.gen.v1.urn.opendaylight.inventory.rev130819.nodes.NodeBuilder;
  85 import org.opendaylight.yang.gen.v1.urn.opendaylight.inventory.rev130819.nodes.NodeKey;
  86 import org.opendaylight.yang.gen.v1.urn.opendaylight.netvirt.fibmanager.rev150330.FibEntries;
  87 import org.opendaylight.yang.gen.v1.urn.opendaylight.netvirt.fibmanager.rev150330.RouterInterface;
  88 import org.opendaylight.yang.gen.v1.urn.opendaylight.netvirt.fibmanager.rev150330.fibentries.VrfTables;
  89 import org.opendaylight.yang.gen.v1.urn.opendaylight.netvirt.fibmanager.rev150330.fibentries.VrfTablesBuilder;
  90 import org.opendaylight.yang.gen.v1.urn.opendaylight.netvirt.fibmanager.rev150330.fibentries.VrfTablesKey;
  91 import org.opendaylight.yang.gen.v1.urn.opendaylight.netvirt.fibmanager.rev150330.vrfentries.VrfEntry;
  92 import org.opendaylight.yang.gen.v1.urn.opendaylight.netvirt.fibmanager.rev150330.vrfentries.VrfEntryBuilder;
  93 import org.opendaylight.yang.gen.v1.urn.opendaylight.netvirt.fibmanager.rev150330.vrfentries.VrfEntryKey;
  94 import org.opendaylight.yang.gen.v1.urn.opendaylight.netvirt.fibmanager.rev150330.vrfentrybase.RoutePaths;
  95 import org.opendaylight.yang.gen.v1.urn.opendaylight.netvirt.l3vpn.rev130911.Adjacencies;
  96 import org.opendaylight.yang.gen.v1.urn.opendaylight.netvirt.l3vpn.rev130911.AdjacenciesOp;
  97 import org.opendaylight.yang.gen.v1.urn.opendaylight.netvirt.l3vpn.rev130911.DpidL3vpnLbNexthops;
  98 import org.opendaylight.yang.gen.v1.urn.opendaylight.netvirt.l3vpn.rev130911.L3vpnLbNexthops;
  99 import org.opendaylight.yang.gen.v1.urn.opendaylight.netvirt.l3vpn.rev130911.VpnIdToVpnInstance;
 100 import org.opendaylight.yang.gen.v1.urn.opendaylight.netvirt.l3vpn.rev130911.VpnInstanceOpData;
 101 import org.opendaylight.yang.gen.v1.urn.opendaylight.netvirt.l3vpn.rev130911.VpnInstanceToVpnId;
 102 import org.opendaylight.yang.gen.v1.urn.opendaylight.netvirt.l3vpn.rev130911.adjacency.list.Adjacency;
 103 import org.opendaylight.yang.gen.v1.urn.opendaylight.netvirt.l3vpn.rev130911.dpid.l3vpn.lb.nexthops.DpnLbNexthops;
 104 import org.opendaylight.yang.gen.v1.urn.opendaylight.netvirt.l3vpn.rev130911.dpid.l3vpn.lb.nexthops.DpnLbNexthopsBuilder;
 105 import org.opendaylight.yang.gen.v1.urn.opendaylight.netvirt.l3vpn.rev130911.dpid.l3vpn.lb.nexthops.DpnLbNexthopsKey;
 106 import org.opendaylight.yang.gen.v1.urn.opendaylight.netvirt.l3vpn.rev130911.l3vpn.lb.nexthops.Nexthops;
 107 import org.opendaylight.yang.gen.v1.urn.opendaylight.netvirt.l3vpn.rev130911.l3vpn.lb.nexthops.NexthopsBuilder;
 108 import org.opendaylight.yang.gen.v1.urn.opendaylight.netvirt.l3vpn.rev130911.l3vpn.lb.nexthops.NexthopsKey;
 109 import org.opendaylight.yang.gen.v1.urn.opendaylight.netvirt.l3vpn.rev130911.prefix.to._interface.vpn.ids.Prefixes;
 110 import org.opendaylight.yang.gen.v1.urn.opendaylight.netvirt.l3vpn.rev130911.vpn._interface.op.data.VpnInterfaceOpDataEntry;
 111 import org.opendaylight.yang.gen.v1.urn.opendaylight.netvirt.l3vpn.rev130911.vpn._interface.op.data.VpnInterfaceOpDataEntryKey;
 112 import org.opendaylight.yang.gen.v1.urn.opendaylight.netvirt.l3vpn.rev130911.vpn.id.to.vpn.instance.VpnIds;
 113 import org.opendaylight.yang.gen.v1.urn.opendaylight.netvirt.l3vpn.rev130911.vpn.id.to.vpn.instance.VpnIdsKey;
 114 import org.opendaylight.yang.gen.v1.urn.opendaylight.netvirt.l3vpn.rev130911.vpn.instance.op.data.VpnInstanceOpDataEntry;
 115 import org.opendaylight.yang.gen.v1.urn.opendaylight.netvirt.l3vpn.rev130911.vpn.instance.op.data.VpnInstanceOpDataEntryKey;
 116 import org.opendaylight.yang.gen.v1.urn.opendaylight.netvirt.l3vpn.rev130911.vpn.instance.op.data.vpn.instance.op.data.entry.VpnToDpnList;
 117 import org.opendaylight.yang.gen.v1.urn.opendaylight.netvirt.l3vpn.rev130911.vpn.instance.op.data.vpn.instance.op.data.entry.VpnToDpnListKey;
 118 import org.opendaylight.yang.gen.v1.urn.opendaylight.netvirt.l3vpn.rev130911.vpn.instance.to.vpn.id.VpnInstance;
 119 import org.opendaylight.yang.gen.v1.urn.opendaylight.netvirt.l3vpn.rev130911.vpn.to.extraroutes.vpn.extra.routes.Routes;
 120 import org.opendaylight.yang.gen.v1.urn.opendaylight.netvirt.neutronvpn.rev150602.NetworkAttributes;
 121 import org.opendaylight.yang.gen.v1.urn.opendaylight.netvirt.neutronvpn.rev150602.NetworkAttributes.NetworkType;
 122 import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
 123 import org.opendaylight.yangtools.yang.common.RpcResult;
 124 import org.slf4j.Logger;
 125 import org.slf4j.LoggerFactory;
 126
 127 @Singleton
 128 public class FibUtil {
 129     private static final Logger LOG = LoggerFactory.getLogger(FibUtil.class);
 130     private static final String FLOWID_PREFIX = "L3.";
 131
 132     private final DataBroker dataBroker;
 133     private final IElanService elanManager;
 134     private final IdManagerService idManager;
 135     private final IITMProvider iitmProvider;
 136
 137     @Inject
 138     public FibUtil(DataBroker dataBroker, IElanService elanManager, IdManagerService idManager,
 139            IITMProvider iitmProvider) {
 140         this.dataBroker = dataBroker;
 141         this.elanManager = elanManager;
 142         this.idManager = idManager;
 143         this.iitmProvider = iitmProvider;
 144     }
 145
 146     static InstanceIdentifier<Adjacency> getAdjacencyIdentifier(String vpnInterfaceName, String ipAddress) {
 147         return InstanceIdentifier.builder(org.opendaylight.yang.gen.v1.urn.huawei.params.xml.ns.yang
 148             .l3vpn.rev140815.VpnInterfaces.class)
 149             .child(org.opendaylight.yang.gen.v1.urn.huawei.params.xml.ns.yang.l3vpn.rev140815.vpn.interfaces
 150                 .VpnInterface.class,
 151                 new org.opendaylight.yang.gen.v1.urn.huawei.params.xml.ns.yang.l3vpn.rev140815.vpn.interfaces
 152                     .VpnInterfaceKey(vpnInterfaceName))
 153             .augmentation(org.opendaylight.yang.gen.v1.urn.opendaylight.netvirt.l3vpn.rev130911.Adjacencies.class)
 154             .child(org.opendaylight.yang.gen.v1.urn.opendaylight.netvirt.l3vpn.rev130911.adjacency.list.Adjacency.class,
 155                 new org.opendaylight.yang.gen.v1.urn.opendaylight.netvirt.l3vpn.rev130911.adjacency.list
 156                     .AdjacencyKey(ipAddress)).build();
 157     }
 158
 159     static InstanceIdentifier<Adjacency> getAdjacencyIdentifierOp(String vpnInterfaceName,
 160                                       String vpnName, String ipAddress) {
 161         LOG.debug("getAdjacencyIdentifierOp vpninterface {} vpn {} ip {}", vpnInterfaceName, vpnName, ipAddress);
 162         return getAdjListPathOp(vpnInterfaceName, vpnName).builder()
 163                           .child(org.opendaylight.yang.gen.v1.urn.opendaylight
 164                           .netvirt.l3vpn.rev130911.adjacency.list.Adjacency.class,
 165                           new org.opendaylight.yang.gen.v1.urn.opendaylight.netvirt.l3vpn.rev130911.adjacency.list
 166                               .AdjacencyKey(ipAddress)).build();
 167     }
 168
 169     static InstanceIdentifier<Adjacencies> getAdjListPath(String vpnInterfaceName) {
 170         return InstanceIdentifier.builder(org.opendaylight.yang.gen.v1.urn.huawei.params.xml.ns.yang.l3vpn
 171             .rev140815.VpnInterfaces.class)
 172             .child(org.opendaylight.yang.gen.v1.urn.huawei.params.xml.ns.yang.l3vpn.rev140815.vpn.interfaces
 173                 .VpnInterface.class,
 174                 new org.opendaylight.yang.gen.v1.urn.huawei.params.xml.ns.yang.l3vpn.rev140815.vpn.interfaces
 175                     .VpnInterfaceKey(vpnInterfaceName))
 176             .augmentation(org.opendaylight.yang.gen.v1.urn.opendaylight.netvirt.l3vpn.rev130911.Adjacencies.class)
 177             .build();
 178     }
 179
 180     static InstanceIdentifier<AdjacenciesOp> getAdjListPathOp(String vpnInterfaceName, String vpnName) {
 181         return getVpnInterfaceOpDataEntryIdentifier(vpnInterfaceName, vpnName).builder()
 182             .augmentation(org.opendaylight.yang.gen.v1.urn.opendaylight.netvirt.l3vpn.rev130911
 183             .AdjacenciesOp.class).build();
 184     }
 185
 186     static InstanceIdentifier<Prefixes> getPrefixToInterfaceIdentifier(long vpnId, String ipPrefix) {
 187         return InstanceIdentifier.builder(org.opendaylight.yang.gen.v1.urn.opendaylight.netvirt.l3vpn
 188             .rev130911.PrefixToInterface.class)
 189             .child(org.opendaylight.yang.gen.v1.urn.opendaylight.netvirt.l3vpn.rev130911.prefix.to._interface
 190                 .VpnIds.class,
 191                 new org.opendaylight.yang.gen.v1.urn.opendaylight.netvirt.l3vpn.rev130911.prefix.to._interface
 192                     .VpnIdsKey(vpnId))
 193             .child(org.opendaylight.yang.gen.v1.urn.opendaylight.netvirt.l3vpn.rev130911.prefix.to._interface
 194                     .vpn.ids.Prefixes.class,
 195                 new org.opendaylight.yang.gen.v1.urn.opendaylight.netvirt.l3vpn.rev130911.prefix.to
 196                     ._interface.vpn.ids.PrefixesKey(ipPrefix)).build();
 197     }
 198
 199     static InstanceIdentifier<VpnInterfaceOpDataEntry> getVpnInterfaceOpDataEntryIdentifier(
 200                        String vpnInterfaceName, String vpnName) {
 201         return InstanceIdentifier.builder(org.opendaylight.yang.gen.v1.urn.opendaylight.netvirt.l3vpn.rev130911
 202             .VpnInterfaceOpData.class)
 203             .child(VpnInterfaceOpDataEntry.class,
 204                 new VpnInterfaceOpDataEntryKey(vpnInterfaceName, vpnName)).build();
 205     }
 206
 207     static InstanceIdentifier<VpnInstanceOpDataEntry> getVpnInstanceOpDataIdentifier(String rd) {
 208         return InstanceIdentifier.builder(VpnInstanceOpData.class)
 209             .child(VpnInstanceOpDataEntry.class, new VpnInstanceOpDataEntryKey(rd)).build();
 210     }
 211
 212     Optional<VpnInstanceOpDataEntry> getVpnInstanceOpData(String rd) {
 213         InstanceIdentifier<VpnInstanceOpDataEntry> id = getVpnInstanceOpDataIdentifier(rd);
 214         return MDSALUtil.read(dataBroker, LogicalDatastoreType.OPERATIONAL, id);
 215     }
 216
 217     static Optional<VpnInstanceOpDataEntry> getVpnInstanceOpData(TypedReadTransaction<Operational> operTx, String rd)
 218         throws ExecutionException, InterruptedException {
 219         return operTx.read(getVpnInstanceOpDataIdentifier(rd)).get();
 220     }
 221
 222     @Nullable
 223     VpnInstanceOpDataEntry getVpnInstance(String rd) {
 224         InstanceIdentifier<VpnInstanceOpDataEntry> id =
 225                 InstanceIdentifier.create(VpnInstanceOpData.class)
 226                         .child(VpnInstanceOpDataEntry.class, new VpnInstanceOpDataEntryKey(rd));
 227         Optional<VpnInstanceOpDataEntry> vpnInstanceOpData =
 228                 MDSALUtil.read(dataBroker, LogicalDatastoreType.OPERATIONAL, id);
 229         return vpnInstanceOpData.isPresent() ? vpnInstanceOpData.get() : null;
 230     }
 231
 232     static String getNextHopLabelKey(String rd, String prefix) {
 233         return rd + FibConstants.SEPARATOR + prefix;
 234     }
 235
 236     @Nullable
 237     Prefixes getPrefixToInterface(Long vpnId, String ipPrefix) {
 238         Optional<Prefixes> localNextHopInfoData = MDSALUtil.read(dataBroker, LogicalDatastoreType.OPERATIONAL,
 239             getPrefixToInterfaceIdentifier(vpnId, ipPrefix));
 240         return localNextHopInfoData.isPresent() ? localNextHopInfoData.get() : null;
 241     }
 242
 243     @Nullable
 244     static Prefixes getPrefixToInterface(TypedReadTransaction<Operational> operTx, Long vpnId, String ipPrefix)
 245             throws ExecutionException, InterruptedException {
 246         return operTx.read(getPrefixToInterfaceIdentifier(vpnId, ipPrefix)).get().orNull();
 247     }
 248
 249     @Nullable
 250     String getMacAddressFromPrefix(String ifName, String vpnName, String ipPrefix) {
 251         Optional<Adjacency> adjacencyData = MDSALUtil.read(dataBroker, LogicalDatastoreType.OPERATIONAL,
 252                        getAdjacencyIdentifierOp(ifName, vpnName, ipPrefix));
 253         return adjacencyData.isPresent() ? adjacencyData.get().getMacAddress() : null;
 254     }
 255
 256     void releaseId(String poolName, String idKey) {
 257         ReleaseIdInput idInput = new ReleaseIdInputBuilder().setPoolName(poolName).setIdKey(idKey).build();
 258         try {
 259             RpcResult<ReleaseIdOutput> rpcResult = idManager.releaseId(idInput).get();
 260             if (!rpcResult.isSuccessful()) {
 261                 LOG.error("RPC Call to Get Unique Id for key {} returned with Errors {}", idKey, rpcResult.getErrors());
 262             }
 263         } catch (InterruptedException | ExecutionException e) {
 264             LOG.warn("Exception when getting Unique Id for key {}", idKey, e);
 265         }
 266     }
 267
 268     static InstanceIdentifier<org.opendaylight.yang.gen.v1.urn.opendaylight.netvirt.l3vpn.rev130911.vpn
 269         .instance.to.vpn.id.VpnInstance> getVpnInstanceToVpnIdIdentifier(String vpnName) {
 270         return InstanceIdentifier.builder(VpnInstanceToVpnId.class)
 271             .child(org.opendaylight.yang.gen.v1.urn.opendaylight.netvirt.l3vpn.rev130911.vpn.instance.to.vpn.id
 272                     .VpnInstance.class,
 273                 new org.opendaylight.yang.gen.v1.urn.opendaylight.netvirt.l3vpn.rev130911.vpn.instance.to.vpn.id
 274                     .VpnInstanceKey(vpnName)).build();
 275     }
 276
 277     public long getVpnId(String vpnName) {
 278
 279         InstanceIdentifier<VpnInstance> id = getVpnInstanceToVpnIdIdentifier(vpnName);
 280         return MDSALUtil.read(dataBroker, LogicalDatastoreType.CONFIGURATION, id).toJavaUtil().map(
 281                 VpnInstance::getVpnId).orElse(-1L);
 282     }
 283
 284     /**
 285      * Retrieves the VpnInstance name (typically the VPN Uuid) out from the route-distinguisher.
 286      * @param rd The route-distinguisher
 287      *
 288      * @return The vpn instance
 289      */
 290     public Optional<String> getVpnNameFromRd(String rd) {
 291         return Optional.fromJavaUtil(
 292                 getVpnInstanceOpData(rd).toJavaUtil().map(VpnInstanceOpDataEntry::getVpnInstanceName));
 293     }
 294
 295     @Nullable
 296     public String getVpnNameFromId(long vpnId) {
 297         InstanceIdentifier<VpnIds> id = getVpnIdToVpnInstanceIdentifier(vpnId);
 298         return MDSALUtil.read(dataBroker, LogicalDatastoreType.CONFIGURATION, id).toJavaUtil().map(
 299                 VpnIds::getVpnInstanceName).orElse(null);
 300     }
 301
 302     static InstanceIdentifier<VpnIds> getVpnIdToVpnInstanceIdentifier(long vpnId) {
 303         return InstanceIdentifier.builder(VpnIdToVpnInstance.class)
 304             .child(VpnIds.class, new VpnIdsKey(vpnId)).build();
 305     }
 306
 307     // TODO Clean up the exception handling
 308     @SuppressWarnings("checkstyle:IllegalCatch")
 309     public void addOrUpdateFibEntry(String rd, String macAddress, String prefix, List<String> nextHopList,
 310             VrfEntry.EncapType encapType, long label, long l3vni, String gwMacAddress, String parentVpnRd,
 311             RouteOrigin origin, TypedWriteTransaction<Configuration> writeConfigTxn) {
 312         if (rd == null || rd.isEmpty()) {
 313             LOG.error("Prefix {} not associated with vpn", prefix);
 314             return;
 315         }
 316
 317         Preconditions.checkNotNull(nextHopList, "NextHopList can't be null");
 318
 319         try {
 320             InstanceIdentifier<VrfEntry> vrfEntryId =
 321                 InstanceIdentifier.builder(FibEntries.class)
 322                     .child(VrfTables.class, new VrfTablesKey(rd))
 323                     .child(VrfEntry.class, new VrfEntryKey(prefix)).build();
 324
 325             writeFibEntryToDs(vrfEntryId, prefix, nextHopList, label, l3vni, encapType, origin, macAddress,
 326                     gwMacAddress, parentVpnRd, writeConfigTxn);
 327             LOG.info("addOrUpdateFibEntry: Created/Updated vrfEntry for rd {} prefix {} nexthop {} label {} l3vni {}"
 328                     + " origin {} encapType {}", rd, prefix, nextHopList, label, l3vni, origin, encapType);
 329         } catch (Exception e) {
 330             LOG.error("addOrUpdateFibEntry: rd {} prefix {} nexthop {} label {} l3vni {} origin {} encapType {}"
 331                     + " error ", rd, prefix, nextHopList, label, l3vni, origin, encapType, e);
 332         }
 333     }
 334
 335     // TODO Clean up the exception handling
 336     @SuppressWarnings("checkstyle:IllegalCatch")
 337     public void writeFibEntryToDs(InstanceIdentifier<VrfEntry> vrfEntryId, String prefix, List<String> nextHopList,
 338             long label, Long l3vni, VrfEntry.EncapType encapType, RouteOrigin origin, String macAddress,
 339             String gatewayMacAddress, String parentVpnRd, TypedWriteTransaction<Configuration> writeConfigTxn) {
 340         VrfEntryBuilder vrfEntryBuilder = new VrfEntryBuilder().setDestPrefix(prefix).setOrigin(origin.getValue());
 341         if (parentVpnRd != null) {
 342             vrfEntryBuilder.setParentVpnRd(parentVpnRd);
 343         }
 344         buildVpnEncapSpecificInfo(vrfEntryBuilder, encapType, label, l3vni, macAddress, gatewayMacAddress, nextHopList);
 345         if (writeConfigTxn != null) {
 346             writeConfigTxn.merge(vrfEntryId, vrfEntryBuilder.build(), CREATE_MISSING_PARENTS);
 347         } else {
 348             MDSALUtil.syncUpdate(dataBroker, LogicalDatastoreType.CONFIGURATION, vrfEntryId, vrfEntryBuilder.build());
 349         }
 350     }
 351
 352     @SuppressWarnings("checkstyle:IllegalCatch")
 353     public void addFibEntryForRouterInterface(String rd, String prefix, RouterInterface routerInterface, long label,
 354             TypedWriteTransaction<Configuration> writeConfigTxn) {
 355         if (rd == null || rd.isEmpty()) {
 356             LOG.error("Prefix {} not associated with vpn", prefix);
 357             return;
 358         }
 359
 360         try {
 361             InstanceIdentifier<VrfEntry> vrfEntryId =
 362                 InstanceIdentifier.builder(FibEntries.class)
 363                     .child(VrfTables.class, new VrfTablesKey(rd))
 364                     .child(VrfEntry.class, new VrfEntryKey(prefix)).build();
 365
 366             // Filling the nextHop with dummy nextHopAddress
 367             VrfEntry vrfEntry = FibHelper.getVrfEntryBuilder(prefix, label,
 368                     FibConstants.DEFAULT_NEXTHOP_IP, RouteOrigin.LOCAL, null /* parentVpnRd */)
 369                 .addAugmentation(RouterInterface.class, routerInterface).build();
 370
 371             if (writeConfigTxn != null) {
 372                 writeConfigTxn.merge(vrfEntryId, vrfEntry, CREATE_MISSING_PARENTS);
 373             } else {
 374                 MDSALUtil.syncUpdate(dataBroker, LogicalDatastoreType.CONFIGURATION, vrfEntryId, vrfEntry);
 375             }
 376             LOG.debug("Created vrfEntry for router-interface-prefix {} rd {} label {}", prefix, rd, label);
 377         } catch (Exception e) {
 378             LOG.error("addFibEntryForRouterInterface: prefix {} rd {} label {} error ", prefix, rd, label, e);
 379         }
 380     }
 381
 382     private static void buildVpnEncapSpecificInfo(VrfEntryBuilder builder, VrfEntry.EncapType encapType, long label,
 383                                          long l3vni, String macAddress, String gatewayMac, List<String> nextHopList) {
 384         if (encapType == null) {
 385             builder.setMac(macAddress);
 386             return;
 387         }
 388
 389         // TODO - validate this check
 390         if (l3vni != 0) {
 391             builder.setL3vni(l3vni);
 392         }
 393         builder.setEncapType(encapType);
 394         builder.setGatewayMacAddress(gatewayMac);
 395         builder.setMac(macAddress);
 396         Long lbl = encapType.equals(VrfEntry.EncapType.Mplsgre) ? label : null;
 397         List<RoutePaths> routePaths = nextHopList.stream()
 398                         .filter(nextHop -> nextHop != null && !nextHop.isEmpty())
 399                         .map(nextHop -> FibHelper.buildRoutePath(nextHop, lbl)).collect(toList());
 400         builder.setRoutePaths(routePaths);
 401     }
 402
 403     public void removeFibEntry(String rd, String prefix, TypedWriteTransaction<Configuration> writeConfigTxn) {
 404
 405         if (rd == null || rd.isEmpty()) {
 406             LOG.error("Prefix {} not associated with vpn", prefix);
 407             return;
 408         }
 409         LOG.debug("removeFibEntry: Removing fib entry with destination prefix {} from vrf table for rd {}",
 410                 prefix, rd);
 411
 412         InstanceIdentifier.InstanceIdentifierBuilder<VrfEntry> idBuilder =
 413             InstanceIdentifier.builder(FibEntries.class)
 414                 .child(VrfTables.class, new VrfTablesKey(rd)).child(VrfEntry.class, new VrfEntryKey(prefix));
 415         InstanceIdentifier<VrfEntry> vrfEntryId = idBuilder.build();
 416         if (writeConfigTxn != null) {
 417             writeConfigTxn.delete(vrfEntryId);
 418         } else {
 419             MDSALUtil.syncDelete(dataBroker, LogicalDatastoreType.CONFIGURATION, vrfEntryId);
 420         }
 421         LOG.info("removeFibEntry: Removed Fib Entry rd {} prefix {}",rd, prefix);
 422     }
 423
 424     /**
 425      * Removes a specific Nexthop from a VrfEntry. If Nexthop to remove is the
 426      * last one in the VrfEntry, then the VrfEntry is removed too.
 427      * @param rd              Route-Distinguisher to which the VrfEntry belongs to
 428      * @param prefix          Destination of the route
 429      * @param nextHopToRemove Specific nexthop within the Route to be removed.
 430      *                        If null or empty, then the whole VrfEntry is removed
 431      */
 432     public void removeOrUpdateFibEntry(String rd, String prefix, String nextHopToRemove,
 433             TypedWriteTransaction<Configuration> writeConfigTxn) {
 434
 435         LOG.debug("Removing fib entry with destination prefix {} from vrf table for rd {} nextHop {}", prefix, rd,
 436                 nextHopToRemove);
 437
 438         // Looking for existing prefix in MDSAL database
 439         InstanceIdentifier<VrfEntry> vrfEntryId =
 440             InstanceIdentifier.builder(FibEntries.class).child(VrfTables.class, new VrfTablesKey(rd))
 441                 .child(VrfEntry.class, new VrfEntryKey(prefix)).build();
 442         Optional<VrfEntry> entry = MDSALUtil.read(dataBroker, LogicalDatastoreType.CONFIGURATION, vrfEntryId);
 443         if (entry.isPresent()) {
 444             final List<RoutePaths> routePaths = entry.get().getRoutePaths();
 445             if (routePaths == null || routePaths.isEmpty()) {
 446                 LOG.warn("routePaths is null/empty for given rd {}, prefix {}", rd, prefix);
 447                 return;
 448             }
 449             java.util.Optional<RoutePaths> optRoutePath =
 450                     routePaths.stream()
 451                         .filter(
 452                             routePath -> Objects.equals(routePath.getNexthopAddress(), nextHopToRemove)).findFirst();
 453             if (!optRoutePath.isPresent()) {
 454                 LOG.error("Unable to find a routePath that contains the given nextHop to remove {}", nextHopToRemove);
 455                 return;
 456             }
 457             RoutePaths routePath = optRoutePath.get();
 458             if (routePaths.size() == 1) {
 459                 // Remove the whole entry
 460                 if (writeConfigTxn != null) {
 461                     writeConfigTxn.delete(vrfEntryId);
 462                 } else {
 463                     MDSALUtil.syncDelete(dataBroker, LogicalDatastoreType.CONFIGURATION, vrfEntryId);
 464                 }
 465                 LOG.info("Removed Fib Entry rd {} prefix {} nextHop {}", rd, prefix, nextHopToRemove);
 466             } else {
 467                 InstanceIdentifier<RoutePaths> routePathsId =
 468                         FibHelper.buildRoutePathId(rd, prefix, routePath.getNexthopAddress());
 469                 // Remove route
 470                 MDSALUtil.syncDelete(dataBroker, LogicalDatastoreType.CONFIGURATION, routePathsId);
 471                 LOG.info("Removed Route Path rd {} prefix {}, nextHop {}, label {}", rd, prefix,
 472                         routePath.getNexthopAddress(), routePath.getLabel());
 473             }
 474         } else {
 475             LOG.warn("Could not find VrfEntry for Route-Distinguisher {} prefix {} nexthop {}", rd, prefix,
 476                     nextHopToRemove);
 477         }
 478     }
 479
 480     /**
 481      * Adds or removes nextHop from routePath based on the flag nextHopAdd.
 482      */
 483     public void updateRoutePathForFibEntry(String rd, String prefix, String nextHop, long label,
 484             boolean nextHopAdd, WriteTransaction writeConfigTxn) {
 485
 486         LOG.debug("Updating fib entry for prefix {} with nextHop {} for rd {}.", prefix, nextHop, rd);
 487
 488         InstanceIdentifier<RoutePaths> routePathId = FibHelper.buildRoutePathId(rd, prefix, nextHop);
 489
 490         // FIXME: use routePathId instead?
 491         final ReentrantLock lock = JvmGlobalLocks.getLockForString(rd + prefix + nextHop);
 492         lock.lock();
 493         try {
 494             if (nextHopAdd) {
 495                 RoutePaths routePaths = FibHelper.buildRoutePath(nextHop, label);
 496                 if (writeConfigTxn != null) {
 497                     writeConfigTxn.put(LogicalDatastoreType.CONFIGURATION, routePathId, routePaths,
 498                             CREATE_MISSING_PARENTS);
 499                 } else {
 500                     MDSALUtil.syncWrite(dataBroker, LogicalDatastoreType.CONFIGURATION, routePathId, routePaths);
 501                 }
 502                 LOG.debug("Added routepath with nextHop {} for prefix {} and label {}.", nextHop, prefix, label);
 503             } else {
 504                 Optional<RoutePaths> routePath = MDSALUtil.read(dataBroker,
 505                         LogicalDatastoreType.CONFIGURATION, routePathId);
 506                 if (!routePath.isPresent()) {
 507                     LOG.warn("Couldn't find RoutePath with rd {}, prefix {} and nh {} for deleting",
 508                             rd, prefix, nextHop);
 509                     return;
 510                 }
 511                 if (writeConfigTxn != null) {
 512                     writeConfigTxn.delete(LogicalDatastoreType.CONFIGURATION, routePathId);
 513                 } else {
 514                     MDSALUtil.syncDelete(dataBroker, LogicalDatastoreType.CONFIGURATION, routePathId);
 515                 }
 516                 LOG.info("Removed routepath with nextHop {} for prefix {} and rd {}.", nextHop, prefix, rd);
 517             }
 518         } finally {
 519             lock.unlock();
 520         }
 521     }
 522
 523     public void addVrfTable(String rd, WriteTransaction writeConfigTxn) {
 524         LOG.debug("Adding vrf table for rd {}", rd);
 525         InstanceIdentifier.InstanceIdentifierBuilder<VrfTables> idBuilder =
 526             InstanceIdentifier.builder(FibEntries.class).child(VrfTables.class, new VrfTablesKey(rd));
 527         InstanceIdentifier<VrfTables> vrfTableId = idBuilder.build();
 528         VrfTablesBuilder vrfTablesBuilder = new VrfTablesBuilder().withKey(new VrfTablesKey(rd))
 529             .setRouteDistinguisher(rd).setVrfEntry(new ArrayList<VrfEntry>());
 530         if (writeConfigTxn != null) {
 531             writeConfigTxn.merge(LogicalDatastoreType.CONFIGURATION, vrfTableId, vrfTablesBuilder.build());
 532         } else {
 533             MDSALUtil.syncUpdate(dataBroker, LogicalDatastoreType.CONFIGURATION,
 534                                  vrfTableId, vrfTablesBuilder.build());
 535         }
 536     }
 537
 538     public void removeVrfTable(String rd, TypedWriteTransaction<Configuration> writeConfigTxn) {
 539         LOG.debug("Removing vrf table for rd {}", rd);
 540         InstanceIdentifier.InstanceIdentifierBuilder<VrfTables> idBuilder =
 541             InstanceIdentifier.builder(FibEntries.class).child(VrfTables.class, new VrfTablesKey(rd));
 542         InstanceIdentifier<VrfTables> vrfTableId = idBuilder.build();
 543
 544         if (writeConfigTxn != null) {
 545             writeConfigTxn.delete(vrfTableId);
 546         } else {
 547             Optional<VrfTables> ifStateOptional = MDSALUtil.read(dataBroker,
 548                     LogicalDatastoreType.CONFIGURATION, vrfTableId);
 549             if (ifStateOptional.isPresent()) {
 550                 MDSALUtil.syncDelete(dataBroker, LogicalDatastoreType.CONFIGURATION, vrfTableId);
 551             }
 552         }
 553     }
 554
 555     public static java.util.Optional<Long> getLabelFromRoutePaths(final VrfEntry vrfEntry) {
 556         List<RoutePaths> routePaths = vrfEntry.getRoutePaths();
 557         if (routePaths == null || routePaths.isEmpty() || vrfEntry.getRoutePaths().get(0).getLabel() == null) {
 558             return java.util.Optional.empty();
 559         }
 560         return java.util.Optional.of(vrfEntry.getRoutePaths().get(0).getLabel());
 561     }
 562
 563     public static java.util.Optional<String> getFirstNextHopAddress(final VrfEntry vrfEntry) {
 564         List<RoutePaths> routePaths = vrfEntry.getRoutePaths();
 565         if (routePaths == null || routePaths.isEmpty()) {
 566             return java.util.Optional.empty();
 567         }
 568         return java.util.Optional.of(vrfEntry.getRoutePaths().get(0).getNexthopAddress());
 569     }
 570
 571     public static java.util.Optional<Long> getLabelForNextHop(final VrfEntry vrfEntry, String nextHopIp) {
 572         List<RoutePaths> routePaths = vrfEntry.getRoutePaths();
 573         if (routePaths == null || routePaths.isEmpty()) {
 574             return java.util.Optional.empty();
 575         }
 576         return routePaths.stream()
 577                 .filter(routePath -> Objects.equals(routePath.getNexthopAddress(), nextHopIp))
 578                 .findFirst()
 579                 .map(RoutePaths::getLabel);
 580     }
 581
 582     @Nullable
 583     public StateTunnelList getTunnelState(String interfaceName) throws ReadFailedException {
 584         Optional<StateTunnelList> tunnelStateOptional = iitmProvider.getTunnelState(interfaceName);
 585         if (tunnelStateOptional.isPresent()) {
 586             return tunnelStateOptional.get();
 587         }
 588         return null;
 589     }
 590
 591     public static InstanceIdentifier<Interface> buildStateInterfaceId(String interfaceName) {
 592         InstanceIdentifier.InstanceIdentifierBuilder<Interface> idBuilder =
 593                 InstanceIdentifier.builder(InterfacesState.class)
 594                         .child(org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.interfaces.rev140508
 595                                 .interfaces.state.Interface.class, new org.opendaylight.yang.gen.v1.urn.ietf
 596                                 .params.xml.ns.yang.ietf.interfaces.rev140508.interfaces.state
 597                                 .InterfaceKey(interfaceName));
 598         InstanceIdentifier<org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.interfaces.rev140508
 599                 .interfaces.state.Interface> id = idBuilder.build();
 600         return id;
 601     }
 602
 603     @Nullable
 604     public org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.interfaces.rev140508.interfaces
 605         .state.Interface getInterfaceStateFromOperDS(String interfaceName) {
 606         InstanceIdentifier<org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.interfaces.rev140508
 607             .interfaces.state.Interface> ifStateId = buildStateInterfaceId(interfaceName);
 608         Optional<Interface> ifStateOptional = MDSALUtil.read(dataBroker, LogicalDatastoreType.OPERATIONAL, ifStateId);
 609         if (ifStateOptional.isPresent()) {
 610             return ifStateOptional.get();
 611         }
 612
 613         return null;
 614     }
 615
 616     public static String getCreateLocalNextHopJobKey(Long vpnId, BigInteger dpnId, String prefix) {
 617         return "FIB-" + vpnId.toString() + "-" + dpnId.toString() + "-" + prefix;
 618     }
 619
 620     public static String getCreateRemoteNextHopJobKey(Long vpnId, BigInteger dpnId, String prefix) {
 621         return getCreateLocalNextHopJobKey(vpnId, dpnId, prefix);
 622     }
 623
 624     public static String getJobKeyForRdPrefix(String rd, String prefix) {
 625         return "FIB-" + rd + "-" + prefix;
 626     }
 627
 628     public static String getJobKeyForVpnIdDpnId(Long vpnId, BigInteger dpnId) {
 629         return "FIB-" + vpnId.toString() + "-" + dpnId.toString() ;
 630     }
 631
 632     public void updateUsedRdAndVpnToExtraRoute(TypedReadWriteTransaction<Configuration> confTx,
 633             TypedReadWriteTransaction<Operational> operTx, String tunnelIpRemoved, String primaryRd, String prefix)
 634             throws ExecutionException, InterruptedException {
 635         Optional<VpnInstanceOpDataEntry> optVpnInstance = getVpnInstanceOpData(operTx, primaryRd);
 636         if (!optVpnInstance.isPresent()) {
 637             return;
 638         }
 639         VpnInstanceOpDataEntry vpnInstance = optVpnInstance.get();
 640         String vpnName = vpnInstance.getVpnInstanceName();
 641         long vpnId = vpnInstance.getVpnId();
 642         List<String> usedRds = VpnExtraRouteHelper.getUsedRds(confTx, vpnId, prefix);
 643         // To identify the rd to be removed, iterate through the allocated rds for the prefix and check
 644         // which rd is allocated for the particular OVS.
 645         for (String usedRd : usedRds) {
 646             Optional<Routes> vpnExtraRoutes = VpnExtraRouteHelper.getVpnExtraroutes(operTx, vpnName, usedRd, prefix);
 647             if (vpnExtraRoutes.isPresent()) {
 648                 // Since all the nexthops under one OVS will be present under one rd, only 1 nexthop is read
 649                 // to identify the OVS
 650                 String nextHopRemoved = vpnExtraRoutes.get().getNexthopIpList().get(0);
 651                 Prefixes prefixToInterface = getPrefixToInterface(operTx, vpnId, getIpPrefix(nextHopRemoved));
 652                 if (prefixToInterface != null && tunnelIpRemoved
 653                         .equals(getEndpointIpAddressForDPN(prefixToInterface.getDpnId()))) {
 654                     LOG.info("updating data-stores for prefix {} with primaryRd {} for interface {} on vpn {} ",
 655                             prefix, primaryRd, prefixToInterface.getVpnInterfaceName(), vpnName);
 656                     operTx.delete(FibUtil.getAdjacencyIdentifierOp(prefixToInterface.getVpnInterfaceName(),
 657                                     vpnName, prefix));
 658                     operTx.delete(VpnExtraRouteHelper.getVpnToExtrarouteVrfIdIdentifier(vpnName, usedRd, prefix));
 659                     confTx.delete(VpnExtraRouteHelper.getUsedRdsIdentifier(vpnId, prefix, nextHopRemoved));
 660                     break;
 661                 }
 662             }
 663         }
 664     }
 665
 666     private String getEndpointIpAddressForDPN(BigInteger dpnId) {
 667         //TODO: Move it to a common place for vpn and fib
 668         String nextHopIp = null;
 669         InstanceIdentifier<DPNTEPsInfo> tunnelInfoId =
 670             InstanceIdentifier.builder(DpnEndpoints.class).child(DPNTEPsInfo.class, new DPNTEPsInfoKey(dpnId)).build();
 671         Optional<DPNTEPsInfo> tunnelInfo = MDSALUtil.read(dataBroker, LogicalDatastoreType.CONFIGURATION, tunnelInfoId);
 672         if (tunnelInfo.isPresent()) {
 673             List<TunnelEndPoints> nexthopIpList = tunnelInfo.get().getTunnelEndPoints();
 674             if (nexthopIpList != null && !nexthopIpList.isEmpty()) {
 675                 nextHopIp = nexthopIpList.get(0).getIpAddress().stringValue();
 676             }
 677         }
 678         return nextHopIp;
 679     }
 680
 681     public static String getIpPrefix(String prefix) {
 682         String[] prefixValues = prefix.split(FibConstants.PREFIX_SEPARATOR);
 683         if (prefixValues.length == 1) {
 684             return NWUtil.toIpPrefix(prefix);
 685         }
 686         return prefix;
 687     }
 688
 689     public static boolean isTunnelInterface(AdjacencyResult adjacencyResult) {
 690         return Tunnel.class.equals(adjacencyResult.getInterfaceType());
 691     }
 692
 693     public static InstanceIdentifier<VrfEntry> getNextHopIdentifier(String rd, String prefix) {
 694         return InstanceIdentifier.builder(FibEntries.class)
 695                 .child(VrfTables.class,new VrfTablesKey(rd)).child(VrfEntry.class,new VrfEntryKey(prefix)).build();
 696     }
 697
 698     public List<String> getNextHopAddresses(String rd, String prefix) {
 699         InstanceIdentifier<VrfEntry> vrfEntryId = getNextHopIdentifier(rd, prefix);
 700         Optional<VrfEntry> vrfEntry = MDSALUtil.read(dataBroker, LogicalDatastoreType.CONFIGURATION, vrfEntryId);
 701         if (vrfEntry.isPresent()) {
 702             return FibHelper.getNextHopListFromRoutePaths(vrfEntry.get());
 703         } else {
 704             return Collections.emptyList();
 705         }
 706     }
 707
 708     public static String getGreLbGroupKey(List<String> availableDcGws) {
 709         Preconditions.checkNotNull(availableDcGws, "AvailableDcGws is null");
 710         return "gre-" + availableDcGws.stream().sorted().collect(joining(":"));
 711     }
 712
 713     public static void updateLbGroupInfo(BigInteger dpnId, String destinationIp, String groupIdKey,
 714             String groupId, TypedWriteTransaction<Operational> tx) {
 715         InstanceIdentifier<DpnLbNexthops> id = getDpnLbNexthopsIdentifier(dpnId, destinationIp);
 716         DpnLbNexthops dpnToLbNextHop = buildDpnLbNextHops(dpnId, destinationIp, groupIdKey);
 717         tx.merge(id, dpnToLbNextHop);
 718         InstanceIdentifier<Nexthops> nextHopsId = getNextHopsIdentifier(groupIdKey);
 719         Nexthops nextHopsToGroupId = buildNextHops(dpnId, groupIdKey, groupId);
 720         tx.merge(nextHopsId, nextHopsToGroupId);
 721     }
 722
 723     public static void removeDpnIdToNextHopInfo(String destinationIp, BigInteger dpnId,
 724             TypedWriteTransaction<Operational> tx) {
 725         tx.delete(getDpnLbNexthopsIdentifier(dpnId, destinationIp));
 726     }
 727
 728     public static void removeOrUpdateNextHopInfo(BigInteger dpnId, String nextHopKey, String groupId,
 729             Nexthops nexthops, TypedWriteTransaction<Operational> tx) {
 730         InstanceIdentifier<Nexthops> nextHopsId = getNextHopsIdentifier(nextHopKey);
 731         List<String> targetDeviceIds =
 732             nexthops.getTargetDeviceId() != null ? new ArrayList<>(nexthops.getTargetDeviceId()) : new ArrayList<>();
 733         targetDeviceIds.remove(dpnId.toString());
 734         if (targetDeviceIds.isEmpty()) {
 735             tx.delete(nextHopsId);
 736         } else {
 737             Nexthops nextHopsToGroupId = new NexthopsBuilder().withKey(new NexthopsKey(nextHopKey))
 738                 .setNexthopKey(nextHopKey)
 739                 .setGroupId(groupId)
 740                 .setTargetDeviceId(targetDeviceIds).build();
 741             tx.put(nextHopsId, nextHopsToGroupId);
 742         }
 743     }
 744
 745     private static InstanceIdentifier<DpnLbNexthops> getDpnLbNexthopsIdentifier(BigInteger dpnId,
 746             String destinationIp) {
 747         return InstanceIdentifier.builder(DpidL3vpnLbNexthops.class)
 748                 .child(DpnLbNexthops.class, new DpnLbNexthopsKey(destinationIp, dpnId))
 749                 .build();
 750     }
 751
 752     private static InstanceIdentifier<Nexthops> getNextHopsIdentifier(String groupIdKey) {
 753         return InstanceIdentifier.builder(L3vpnLbNexthops.class)
 754                 .child(Nexthops.class, new NexthopsKey(groupIdKey)).build();
 755     }
 756
 757     private static Nexthops buildNextHops(BigInteger dpnId, String groupIdKey, String groupId) {
 758         return new NexthopsBuilder().withKey(new NexthopsKey(groupIdKey))
 759                 .setNexthopKey(groupIdKey)
 760                 .setGroupId(groupId)
 761                 .setTargetDeviceId(Collections.singletonList(dpnId.toString())).build();
 762     }
 763
 764     private static DpnLbNexthops buildDpnLbNextHops(BigInteger dpnId, String destinationIp,
 765             String groupIdKey) {
 766         return new DpnLbNexthopsBuilder().withKey(new DpnLbNexthopsKey(destinationIp, dpnId))
 767                 .setDstDeviceId(destinationIp).setSrcDpId(dpnId)
 768                 .setNexthopKey(Collections.singletonList(groupIdKey)).build();
 769     }
 770
 771     public Optional<Nexthops> getNexthops(String nextHopKey) {
 772         InstanceIdentifier<Nexthops> nextHopsId = InstanceIdentifier.builder(L3vpnLbNexthops.class)
 773                 .child(Nexthops.class, new NexthopsKey(nextHopKey)).build();
 774         return MDSALUtil.read(dataBroker, LogicalDatastoreType.OPERATIONAL, nextHopsId);
 775     }
 776
 777     public Optional<DpnLbNexthops> getDpnLbNexthops(BigInteger dpnId, String destinationIp) {
 778         InstanceIdentifier<DpnLbNexthops> id = InstanceIdentifier.builder(DpidL3vpnLbNexthops.class)
 779                 .child(DpnLbNexthops.class, new DpnLbNexthopsKey(destinationIp, dpnId))
 780                 .build();
 781         return MDSALUtil.read(dataBroker, LogicalDatastoreType.OPERATIONAL, id);
 782     }
 783
 784     static boolean isVxlanNetwork(NetworkType networkType) {
 785         if (networkType != null) {
 786             return networkType == NetworkAttributes.NetworkType.VXLAN;
 787         }
 788         return false;
 789     }
 790
 791     static boolean isBgpVpn(String vpnName, String rd) {
 792         return vpnName != null && !vpnName.equals(rd);
 793     }
 794
 795     static NodeRef buildNodeRef(BigInteger dpId) {
 796         return new NodeRef(InstanceIdentifier.builder(Nodes.class)
 797                 .child(Node.class, new NodeKey(new NodeId("openflow:" + dpId))).build());
 798     }
 799
 800     static InstanceIdentifier<Group> buildGroupInstanceIdentifier(long groupId, BigInteger dpId) {
 801         return InstanceIdentifier.builder(Nodes.class).child(Node.class, new NodeKey(new NodeId("openflow:" + dpId)))
 802                 .augmentation(FlowCapableNode.class).child(Group.class, new GroupKey(new GroupId(groupId))).build();
 803     }
 804
 805     static Buckets buildBuckets(List<BucketInfo> listBucketInfo) {
 806         long index = 0;
 807         BucketsBuilder bucketsBuilder = new BucketsBuilder();
 808         if (listBucketInfo != null) {
 809             List<Bucket> bucketList = new ArrayList<>();
 810
 811             for (BucketInfo bucketInfo : listBucketInfo) {
 812                 BucketBuilder bucketBuilder = new BucketBuilder();
 813                 bucketBuilder.setAction(bucketInfo.buildActions());
 814                 bucketBuilder.setWeight(bucketInfo.getWeight());
 815                 bucketBuilder.setBucketId(new BucketId(index++));
 816                 bucketBuilder.setWeight(bucketInfo.getWeight()).setWatchPort(bucketInfo.getWatchPort())
 817                         .setWatchGroup(bucketInfo.getWatchGroup());
 818                 bucketList.add(bucketBuilder.build());
 819             }
 820
 821             bucketsBuilder.setBucket(bucketList);
 822         }
 823         return bucketsBuilder.build();
 824     }
 825
 826     static String getFlowRef(BigInteger dpnId, short tableId, long label, int priority) {
 827         return FLOWID_PREFIX + dpnId + NwConstants.FLOWID_SEPARATOR + tableId + NwConstants.FLOWID_SEPARATOR + label
 828                 + NwConstants.FLOWID_SEPARATOR + priority;
 829     }
 830
 831     static String getFlowRef(BigInteger dpnId, short tableId, String rd, int priority, InetAddress destPrefix) {
 832         return FLOWID_PREFIX + dpnId + NwConstants.FLOWID_SEPARATOR + tableId + NwConstants.FLOWID_SEPARATOR + rd
 833                 + NwConstants.FLOWID_SEPARATOR + priority + NwConstants.FLOWID_SEPARATOR + destPrefix.getHostAddress();
 834     }
 835
 836     static String getL3VpnGatewayFlowRef(short l3GwMacTable, BigInteger dpId, long vpnId, String gwMacAddress) {
 837         return gwMacAddress + NwConstants.FLOWID_SEPARATOR + vpnId + NwConstants.FLOWID_SEPARATOR + dpId
 838                 + NwConstants.FLOWID_SEPARATOR + l3GwMacTable;
 839     }
 840
 841     static Node buildDpnNode(BigInteger dpnId) {
 842         return new NodeBuilder().setId(new NodeId("openflow:" + dpnId))
 843                 .withKey(new NodeKey(new NodeId("openflow:" + dpnId))).build();
 844     }
 845
 846     public static String getBroadcastAddressFromCidr(String cidr) {
 847         String[] ipaddressValues = cidr.split("/");
 848         int address = InetAddresses.coerceToInteger(InetAddresses.forString(ipaddressValues[0]));
 849         int cidrPart = Integer.parseInt(ipaddressValues[1]);
 850         int netmask = 0;
 851         for (int j = 0; j < cidrPart; ++j) {
 852             netmask |= 1 << 31 - j;
 853         }
 854         int network = address & netmask;
 855         int broadcast = network | ~netmask;
 856         return InetAddresses.toAddrString(InetAddresses.fromInteger(broadcast));
 857     }
 858
 859     public static boolean lockCluster(LockManagerService lockManager, String lockName, long tryLockPeriod) {
 860         TryLockInput input = new TryLockInputBuilder().setLockName(lockName).setTime(tryLockPeriod)
 861                 .setTimeUnit(TimeUnits.Milliseconds).build();
 862         Future<RpcResult<TryLockOutput>> result = lockManager.tryLock(input);
 863         boolean lockAcquired;
 864         try {
 865             if (result != null && result.get().isSuccessful()) {
 866                 LOG.debug("lockCluster: Acquired lock for {}", lockName);
 867                 lockAcquired = true;
 868             } else {
 869                 LOG.error("lockCluster: Unable to getLock for {}", lockName);
 870                 lockAcquired = false;
 871             }
 872         } catch (InterruptedException | ExecutionException e) {
 873             LOG.error("lockCluster: Exception while trying to getLock for {}", lockName, e);
 874             lockAcquired = false;
 875         }
 876
 877         return lockAcquired;
 878     }
 879
 880     public static void unlockCluster(LockManagerService lockManager, String lockName) {
 881         UnlockInput input = new UnlockInputBuilder().setLockName(lockName).build();
 882         Future<RpcResult<UnlockOutput>> result = lockManager.unlock(input);
 883         try {
 884             if (result != null && result.get().isSuccessful()) {
 885                 LOG.debug("unlockCluster: Unlocked {}", lockName);
 886             } else {
 887                 LOG.error("unlockCluster: Unable to release lock for {}", lockName);
 888             }
 889         } catch (InterruptedException | ExecutionException e) {
 890             LOG.error("unlockCluster: Unable to unlock {}", lockName, e);
 891         }
 892     }
 893
 894     public boolean isInterfacePresentInDpn(String vpnName, BigInteger dpnId) {
 895         InstanceIdentifier<VpnToDpnList> vpnToDpnListId = InstanceIdentifier.builder(VpnInstanceOpData.class)
 896                 .child(VpnInstanceOpDataEntry.class, new VpnInstanceOpDataEntryKey(vpnName))
 897                 .child(VpnToDpnList.class, new VpnToDpnListKey(dpnId)).build();
 898         try {
 899             VpnToDpnList vpnToDpnList = SingleTransactionDataBroker.syncRead(dataBroker,
 900                     LogicalDatastoreType.OPERATIONAL, vpnToDpnListId);
 901             if (!(vpnToDpnList == null) && !(vpnToDpnList.getVpnInterfaces() == null)
 902                     && !vpnToDpnList.getVpnInterfaces().isEmpty()) {
 903                 return true;
 904             }
 905         } catch (ReadFailedException e) {
 906             LOG.warn("Failed to read interfaces with error {}", e.getMessage());
 907         }
 908         return false;
 909     }
 910 }