bgp/rib-impl/src/main/java/org/opendaylight/protocol/bgp/rib/impl/AdjRibInWriter.java

   1 /*
   2  * Copyright (c) 2015 Cisco Systems, Inc. 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.protocol.bgp.rib.impl;
   9
  10 import com.google.common.annotations.VisibleForTesting;
  11 import com.google.common.base.Preconditions;
  12 import com.google.common.collect.ImmutableMap;
  13 import com.google.common.collect.ImmutableMap.Builder;
  14 import com.google.common.util.concurrent.FutureCallback;
  15 import com.google.common.util.concurrent.Futures;
  16 import com.google.common.util.concurrent.ListenableFuture;
  17 import com.google.common.util.concurrent.MoreExecutors;
  18 import java.util.Collections;
  19 import java.util.Map;
  20 import java.util.Map.Entry;
  21 import java.util.Optional;
  22 import java.util.Set;
  23 import javax.annotation.Nonnull;
  24 import javax.annotation.Nullable;
  25 import javax.annotation.concurrent.NotThreadSafe;
  26 import org.opendaylight.controller.md.sal.common.api.data.LogicalDatastoreType;
  27 import org.opendaylight.controller.md.sal.dom.api.DOMDataWriteTransaction;
  28 import org.opendaylight.controller.md.sal.dom.api.DOMTransactionChain;
  29 import org.opendaylight.protocol.bgp.rib.impl.ApplicationPeer.RegisterAppPeerListener;
  30 import org.opendaylight.protocol.bgp.rib.impl.spi.RIBSupportContext;
  31 import org.opendaylight.protocol.bgp.rib.impl.spi.RIBSupportContextRegistry;
  32 import org.opendaylight.protocol.bgp.rib.spi.IdentifierUtils;
  33 import org.opendaylight.protocol.bgp.rib.spi.PeerRoleUtil;
  34 import org.opendaylight.protocol.bgp.rib.spi.RibSupportUtils;
  35 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.multiprotocol.rev130919.SendReceive;
  36 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.multiprotocol.rev130919.update.attributes.MpReachNlri;
  37 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.multiprotocol.rev130919.update.attributes.MpUnreachNlri;
  38 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.rib.rev130925.PeerId;
  39 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.rib.rev130925.PeerRole;
  40 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.rib.rev130925.SimpleRoutingPolicy;
  41 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.rib.rev130925.bgp.rib.rib.Peer;
  42 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.rib.rev130925.bgp.rib.rib.peer.AdjRibIn;
  43 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.rib.rev130925.bgp.rib.rib.peer.AdjRibOut;
  44 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.rib.rev130925.bgp.rib.rib.peer.EffectiveRibIn;
  45 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.rib.rev130925.bgp.rib.rib.peer.SupportedTables;
  46 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.rib.rev130925.rib.Tables;
  47 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.rib.rev130925.rib.TablesKey;
  48 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.rib.rev130925.rib.tables.Attributes;
  49 import org.opendaylight.yangtools.yang.common.QName;
  50 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier;
  51 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier.InstanceIdentifierBuilder;
  52 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier.NodeIdentifier;
  53 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier.NodeIdentifierWithPredicates;
  54 import org.opendaylight.yangtools.yang.data.api.schema.ContainerNode;
  55 import org.opendaylight.yangtools.yang.data.api.schema.LeafNode;
  56 import org.opendaylight.yangtools.yang.data.api.schema.MapEntryNode;
  57 import org.opendaylight.yangtools.yang.data.impl.schema.Builders;
  58 import org.opendaylight.yangtools.yang.data.impl.schema.ImmutableNodes;
  59 import org.opendaylight.yangtools.yang.data.impl.schema.builder.api.DataContainerNodeAttrBuilder;
  60 import org.opendaylight.yangtools.yang.data.impl.schema.builder.api.DataContainerNodeBuilder;
  61 import org.opendaylight.yangtools.yang.data.impl.schema.builder.impl.ImmutableMapNodeBuilder;
  62 import org.slf4j.Logger;
  63 import org.slf4j.LoggerFactory;
  64 /**
  65  * Writer of Adjacency-RIB-In for a single peer. An instance of this object
  66  * is attached to each {@link BGPPeer} and {@link ApplicationPeer}.
  67  */
  68 @NotThreadSafe
  69 final class AdjRibInWriter {
  70     private static final Logger LOG = LoggerFactory.getLogger(AdjRibInWriter.class);
  71     @VisibleForTesting
  72     static final LeafNode<Boolean> ATTRIBUTES_UPTODATE_FALSE = ImmutableNodes.leafNode(QName.create(Attributes.QNAME, "uptodate"), Boolean.FALSE);
  73     private static final LeafNode<Boolean> ATTRIBUTES_UPTODATE_TRUE = ImmutableNodes.leafNode(ATTRIBUTES_UPTODATE_FALSE.getNodeType(), Boolean.TRUE);
  74     @VisibleForTesting
  75     static final QName PEER_ID_QNAME = QName.create(Peer.QNAME, "peer-id").intern();
  76     private static final QName PEER_ROLE_QNAME = QName.create(Peer.QNAME, "peer-role").intern();
  77     private static final NodeIdentifier ADJRIBIN = new NodeIdentifier(AdjRibIn.QNAME);
  78     private static final NodeIdentifier ADJRIBOUT = new NodeIdentifier(AdjRibOut.QNAME);
  79     private static final NodeIdentifier EFFRIBIN = new NodeIdentifier(EffectiveRibIn.QNAME);
  80     private static final NodeIdentifier PEER_ID = new NodeIdentifier(PEER_ID_QNAME);
  81     private static final NodeIdentifier PEER_ROLE = new NodeIdentifier(PEER_ROLE_QNAME);
  82     private static final NodeIdentifier PEER_TABLES = new NodeIdentifier(SupportedTables.QNAME);
  83     private static final NodeIdentifier TABLES = new NodeIdentifier(Tables.QNAME);
  84     private static final QName SEND_RECEIVE = QName.create(SupportedTables.QNAME, "send-receive").intern();
  85     private static final NodeIdentifier SIMPLE_ROUTING_POLICY_NID = new NodeIdentifier(QName.create(Peer.QNAME, "simple-routing-policy").intern());
  86
  87     // FIXME: is there a utility method to construct this?
  88     private static final ContainerNode EMPTY_ADJRIBIN = Builders.containerBuilder().withNodeIdentifier(ADJRIBIN).addChild(ImmutableNodes.mapNodeBuilder(Tables.QNAME).build()).build();
  89     private static final ContainerNode EMPTY_EFFRIBIN = Builders.containerBuilder().withNodeIdentifier(EFFRIBIN).addChild(ImmutableNodes.mapNodeBuilder(Tables.QNAME).build()).build();
  90     private static final ContainerNode EMPTY_ADJRIBOUT = Builders.containerBuilder().withNodeIdentifier(ADJRIBOUT).addChild(ImmutableNodes.mapNodeBuilder(Tables.QNAME).build()).build();
  91
  92     private final Map<TablesKey, TableContext> tables;
  93     private final YangInstanceIdentifier peerPath;
  94     private final YangInstanceIdentifier ribPath;
  95     private final DOMTransactionChain chain;
  96     private final PeerRole role;
  97     private final Optional<SimpleRoutingPolicy> simpleRoutingPolicy;
  98
  99     private AdjRibInWriter(final YangInstanceIdentifier ribPath, final DOMTransactionChain chain, final PeerRole role,
 100         final Optional<SimpleRoutingPolicy> simpleRoutingPolicy, final YangInstanceIdentifier peerPath, final Map<TablesKey, TableContext> tables) {
 101         this.ribPath = Preconditions.checkNotNull(ribPath);
 102         this.chain = Preconditions.checkNotNull(chain);
 103         this.tables = Preconditions.checkNotNull(tables);
 104         this.role = Preconditions.checkNotNull(role);
 105         this.simpleRoutingPolicy = simpleRoutingPolicy;
 106         this.peerPath = peerPath;
 107     }
 108
 109     /**
 110      * Create a new writer using a transaction chain.
 111      *
 112      * @param role peer's role
 113      * @param simpleRoutingPolicy simple Routing Policy {@link SimpleRoutingPolicy}
 114      *@param chain transaction chain  @return A fresh writer instance
 115      */
 116     static AdjRibInWriter create(@Nonnull final YangInstanceIdentifier ribId, @Nonnull final PeerRole role,
 117         final Optional<SimpleRoutingPolicy> simpleRoutingPolicy, @Nonnull final DOMTransactionChain chain) {
 118         return new AdjRibInWriter(ribId, chain, role, simpleRoutingPolicy, null, Collections.emptyMap());
 119     }
 120
 121     /**
 122      * Transform this writer to a new writer, which is in charge of specified tables.
 123      * Empty tables are created for new entries and old tables are deleted. Once this
 124      * method returns, the old instance must not be reasonably used.
 125      *
 126      * @param newPeerId new peer BGP identifier
 127      * @param registry RIB extension registry
 128      * @param tableTypes New tables, must not be null
 129      * @param addPathTablesType
 130      * @return New writer
 131      */
 132     AdjRibInWriter transform(final PeerId newPeerId, final RIBSupportContextRegistry registry,
 133         final Set<TablesKey> tableTypes, final Map<TablesKey, SendReceive> addPathTablesType) {
 134         return transform(newPeerId, registry, tableTypes, addPathTablesType, null);
 135     }
 136
 137     AdjRibInWriter transform(final PeerId newPeerId, final RIBSupportContextRegistry registry, final Set<TablesKey> tableTypes,
 138         final Map<TablesKey, SendReceive> addPathTablesType, @Nullable final RegisterAppPeerListener registerAppPeerListener) {
 139         final DOMDataWriteTransaction tx = this.chain.newWriteOnlyTransaction();
 140
 141         final YangInstanceIdentifier newPeerPath;
 142         newPeerPath = createEmptyPeerStructure(newPeerId, tx);
 143         final ImmutableMap<TablesKey, TableContext> tb = createNewTableInstances(newPeerPath, registry, tableTypes,
 144             addPathTablesType, tx);
 145
 146         Futures.addCallback(tx.submit(), new FutureCallback<Void>() {
 147             @Override
 148             public void onSuccess(final Void result) {
 149                 if(registerAppPeerListener != null) {
 150                     LOG.trace("Application Peer Listener registered");
 151                     registerAppPeerListener.register();
 152                 }
 153             }
 154
 155             @Override
 156             public void onFailure(final Throwable throwable) {
 157                 if(registerAppPeerListener != null) {
 158                     LOG.error("Failed to create Empty Structure, Application Peer Listener won't be registered",
 159                         throwable);
 160                 } else {
 161                     LOG.error("Failed to create Empty Structure", throwable);
 162                 }
 163             }
 164         }, MoreExecutors.directExecutor());
 165         return new AdjRibInWriter(this.ribPath, this.chain, this.role, this.simpleRoutingPolicy, newPeerPath, tb);
 166     }
 167
 168     /**
 169      * Create new table instances, potentially creating their empty entries
 170      * @param newPeerPath
 171      * @param registry
 172      * @param tableTypes
 173      * @param addPathTablesType
 174      * @param tx
 175      * @return
 176      */
 177     private ImmutableMap<TablesKey, TableContext> createNewTableInstances(final YangInstanceIdentifier newPeerPath,
 178         final RIBSupportContextRegistry registry, final Set<TablesKey> tableTypes, final Map<TablesKey, SendReceive> addPathTablesType,
 179         final DOMDataWriteTransaction tx) {
 180
 181         final Builder<TablesKey, TableContext> tb = ImmutableMap.builder();
 182         for (final TablesKey tableKey : tableTypes) {
 183             final RIBSupportContext rs = registry.getRIBSupportContext(tableKey);
 184             // TODO: Use returned value once Instance Identifier builder allows for it.
 185             final NodeIdentifierWithPredicates instanceIdentifierKey = RibSupportUtils.toYangTablesKey(tableKey);
 186             if (rs == null) {
 187                 LOG.warn("No support for table type {}, skipping it", tableKey);
 188                 continue;
 189             }
 190             installAdjRibsOutTables(newPeerPath, rs, instanceIdentifierKey, tableKey, addPathTablesType.get(tableKey), tx);
 191             installAdjRibInTables(newPeerPath, tableKey, rs, instanceIdentifierKey, tx, tb);
 192         }
 193         return tb.build();
 194     }
 195
 196     private static void installAdjRibInTables(final YangInstanceIdentifier newPeerPath, final TablesKey tableKey,
 197             final RIBSupportContext rs, final NodeIdentifierWithPredicates instanceIdentifierKey,
 198             final DOMDataWriteTransaction tx, final Builder<TablesKey, TableContext> tb) {
 199         // We will use table keys very often, make sure they are optimized
 200         final InstanceIdentifierBuilder idb = YangInstanceIdentifier.builder(newPeerPath.node(EMPTY_ADJRIBIN.getIdentifier()).node(TABLES));
 201         idb.nodeWithKey(instanceIdentifierKey.getNodeType(), instanceIdentifierKey.getKeyValues());
 202
 203         final TableContext ctx = new TableContext(rs, idb.build());
 204         ctx.createEmptyTableStructure(tx);
 205
 206         tx.merge(LogicalDatastoreType.OPERATIONAL, ctx.getTableId().node(Attributes.QNAME).node(ATTRIBUTES_UPTODATE_FALSE.getNodeType()), ATTRIBUTES_UPTODATE_FALSE);
 207         LOG.debug("Created table instance {}", ctx.getTableId());
 208         tb.put(tableKey, ctx);
 209     }
 210
 211     private void installAdjRibsOutTables(final YangInstanceIdentifier newPeerPath, final RIBSupportContext rs,
 212         final NodeIdentifierWithPredicates instanceIdentifierKey, final TablesKey tableKey, final SendReceive sendReceive,
 213         final DOMDataWriteTransaction tx) {
 214         if (!isAnnounceNone(this.simpleRoutingPolicy)) {
 215             final NodeIdentifierWithPredicates supTablesKey = RibSupportUtils.toYangKey(SupportedTables.QNAME, tableKey);
 216             final DataContainerNodeAttrBuilder<NodeIdentifierWithPredicates, MapEntryNode> tt = Builders.mapEntryBuilder().withNodeIdentifier(supTablesKey);
 217             for (final Entry<QName, Object> e : supTablesKey.getKeyValues().entrySet()) {
 218                 tt.withChild(ImmutableNodes.leafNode(e.getKey(), e.getValue()));
 219             }
 220             if(sendReceive != null) {
 221                 tt.withChild(ImmutableNodes.leafNode(SEND_RECEIVE, sendReceive.toString().toLowerCase()));
 222             }
 223             tx.put(LogicalDatastoreType.OPERATIONAL, newPeerPath.node(PEER_TABLES).node(supTablesKey), tt.build());
 224             rs.createEmptyTableStructure(tx, newPeerPath.node(EMPTY_ADJRIBOUT.getIdentifier()).node(TABLES).node(instanceIdentifierKey));
 225         }
 226     }
 227
 228     private YangInstanceIdentifier createEmptyPeerStructure(final PeerId newPeerId, final DOMDataWriteTransaction tx) {
 229         final NodeIdentifierWithPredicates peerKey = IdentifierUtils.domPeerId(newPeerId);
 230         final YangInstanceIdentifier newPeerPath = this.ribPath.node(Peer.QNAME).node(peerKey);
 231
 232         tx.put(LogicalDatastoreType.OPERATIONAL, newPeerPath, peerSkeleton(peerKey, newPeerId.getValue()));
 233         LOG.debug("New peer {} structure installed.", newPeerPath);
 234         return newPeerPath;
 235     }
 236
 237     @VisibleForTesting
 238     MapEntryNode peerSkeleton(final NodeIdentifierWithPredicates peerKey, final String peerId) {
 239         final DataContainerNodeBuilder<NodeIdentifierWithPredicates, MapEntryNode> pb = Builders.mapEntryBuilder();
 240         pb.withNodeIdentifier(peerKey);
 241         pb.withChild(ImmutableNodes.leafNode(PEER_ID, peerId));
 242         pb.withChild(ImmutableNodes.leafNode(PEER_ROLE, PeerRoleUtil.roleForString(this.role)));
 243         if (this.simpleRoutingPolicy.isPresent() && this.role != PeerRole.Internal) {
 244             pb.withChild(ImmutableNodes.leafNode(SIMPLE_ROUTING_POLICY_NID, simpleRoutingPolicyString(this.simpleRoutingPolicy.get())));
 245         }
 246         pb.withChild(ImmutableMapNodeBuilder.create().withNodeIdentifier(PEER_TABLES).build());
 247         pb.withChild(EMPTY_ADJRIBIN);
 248         if(!isLearnNone(this.simpleRoutingPolicy)) {
 249             pb.withChild(EMPTY_EFFRIBIN);
 250         }
 251         if (!isAnnounceNone(this.simpleRoutingPolicy)) {
 252             pb.withChild(EMPTY_ADJRIBOUT);
 253         }
 254         return pb.build();
 255     }
 256
 257     ListenableFuture<Void> removePeer() {
 258         if(this.peerPath != null) {
 259             final DOMDataWriteTransaction tx = this.chain.newWriteOnlyTransaction();
 260             tx.delete(LogicalDatastoreType.OPERATIONAL, this.peerPath);
 261             final ListenableFuture<Void> future = tx.submit();
 262             Futures.addCallback(future, new FutureCallback<Void>() {
 263                 @Override
 264                 public void onSuccess(final Void result) {
 265                     LOG.debug("Peer {} removed", AdjRibInWriter.this.peerPath);
 266                 }
 267
 268                 @Override
 269                 public void onFailure(final Throwable t) {
 270                     LOG.warn("Failed to remove Peer {}", AdjRibInWriter.this.peerPath, t);
 271                 }
 272             }, MoreExecutors.directExecutor());
 273             return future;
 274         }
 275         return Futures.immediateFuture(null);
 276     }
 277
 278     void markTableUptodate(final TablesKey tableTypes) {
 279         final DOMDataWriteTransaction tx = this.chain.newWriteOnlyTransaction();
 280         final TableContext ctx = this.tables.get(tableTypes);
 281         tx.merge(LogicalDatastoreType.OPERATIONAL, ctx.getTableId().node(Attributes.QNAME).node(ATTRIBUTES_UPTODATE_TRUE.getNodeType()), ATTRIBUTES_UPTODATE_TRUE);
 282         tx.submit();
 283     }
 284
 285     void updateRoutes(final MpReachNlri nlri, final org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.message.rev130919.path.attributes.Attributes attributes) {
 286         final TablesKey key = new TablesKey(nlri.getAfi(), nlri.getSafi());
 287         final TableContext ctx = this.tables.get(key);
 288         if (ctx == null) {
 289             LOG.debug("No table for {}, not accepting NLRI {}", key, nlri);
 290             return;
 291         }
 292
 293         final DOMDataWriteTransaction tx = this.chain.newWriteOnlyTransaction();
 294         ctx.writeRoutes(tx, nlri, attributes);
 295         LOG.trace("Write routes {}", nlri);
 296         tx.submit();
 297     }
 298
 299     void removeRoutes(final MpUnreachNlri nlri) {
 300         final TablesKey key = new TablesKey(nlri.getAfi(), nlri.getSafi());
 301         final TableContext ctx = this.tables.get(key);
 302         if (ctx == null) {
 303             LOG.debug("No table for {}, not accepting NLRI {}", key, nlri);
 304             return;
 305         }
 306         LOG.trace("Removing routes {}", nlri);
 307         final DOMDataWriteTransaction tx = this.chain.newWriteOnlyTransaction();
 308         ctx.removeRoutes(tx, nlri);
 309         tx.submit();
 310     }
 311
 312     static boolean isAnnounceNone(final java.util.Optional<SimpleRoutingPolicy> peerStatus) {
 313         return peerStatus.isPresent() && peerStatus.get() == SimpleRoutingPolicy.AnnounceNone;
 314     }
 315
 316     static boolean isLearnNone(final java.util.Optional<SimpleRoutingPolicy> peerStatus) {
 317         return peerStatus.isPresent() && peerStatus.get() == SimpleRoutingPolicy.LearnNone;
 318     }
 319
 320     private static String simpleRoutingPolicyString(final SimpleRoutingPolicy simpleRoutingPolicy) {
 321         switch (simpleRoutingPolicy) {
 322         case AnnounceNone:
 323             return "announce-none";
 324         case LearnNone:
 325             return "learn-none";
 326         default:
 327             throw new IllegalArgumentException("Unhandled Simple Routing Policy " + simpleRoutingPolicy);
 328         }
 329     }
 330 }