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 static java.util.Objects.requireNonNull;
  11
  12 import com.google.common.annotations.VisibleForTesting;
  13 import com.google.common.collect.ImmutableMap;
  14 import com.google.common.collect.ImmutableMap.Builder;
  15 import com.google.common.util.concurrent.FutureCallback;
  16 import com.google.common.util.concurrent.Futures;
  17 import com.google.common.util.concurrent.ListenableFuture;
  18 import com.google.common.util.concurrent.MoreExecutors;
  19 import java.util.Collections;
  20 import java.util.Map;
  21 import java.util.Map.Entry;
  22 import java.util.Optional;
  23 import java.util.Set;
  24 import javax.annotation.Nonnull;
  25 import javax.annotation.Nullable;
  26 import javax.annotation.concurrent.NotThreadSafe;
  27 import org.opendaylight.controller.md.sal.common.api.data.LogicalDatastoreType;
  28 import org.opendaylight.controller.md.sal.dom.api.DOMDataWriteTransaction;
  29 import org.opendaylight.controller.md.sal.dom.api.DOMTransactionChain;
  30 import org.opendaylight.protocol.bgp.rib.impl.ApplicationPeer.RegisterAppPeerListener;
  31 import org.opendaylight.protocol.bgp.rib.impl.spi.RIBSupportContext;
  32 import org.opendaylight.protocol.bgp.rib.impl.spi.RIBSupportContextRegistry;
  33 import org.opendaylight.protocol.bgp.rib.spi.IdentifierUtils;
  34 import org.opendaylight.protocol.bgp.rib.spi.PeerRoleUtil;
  35 import org.opendaylight.protocol.bgp.rib.spi.RibSupportUtils;
  36 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.multiprotocol.rev130919.SendReceive;
  37 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.multiprotocol.rev130919.update.attributes.MpReachNlri;
  38 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.multiprotocol.rev130919.update.attributes.MpUnreachNlri;
  39 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.rib.rev130925.PeerId;
  40 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.rib.rev130925.PeerRole;
  41 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.rib.rev130925.SimpleRoutingPolicy;
  42 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.rib.rev130925.bgp.rib.rib.Peer;
  43 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.rib.rev130925.bgp.rib.rib.peer.AdjRibIn;
  44 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.rib.rev130925.bgp.rib.rib.peer.AdjRibOut;
  45 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.rib.rev130925.bgp.rib.rib.peer.EffectiveRibIn;
  46 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.rib.rev130925.bgp.rib.rib.peer.SupportedTables;
  47 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.rib.rev130925.rib.Tables;
  48 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.rib.rev130925.rib.TablesKey;
  49 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.rib.rev130925.rib.tables.Attributes;
  50 import org.opendaylight.yangtools.yang.common.QName;
  51 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier;
  52 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier.InstanceIdentifierBuilder;
  53 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier.NodeIdentifier;
  54 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier.NodeIdentifierWithPredicates;
  55 import org.opendaylight.yangtools.yang.data.api.schema.ContainerNode;
  56 import org.opendaylight.yangtools.yang.data.api.schema.LeafNode;
  57 import org.opendaylight.yangtools.yang.data.api.schema.MapEntryNode;
  58 import org.opendaylight.yangtools.yang.data.impl.schema.Builders;
  59 import org.opendaylight.yangtools.yang.data.impl.schema.ImmutableNodes;
  60 import org.opendaylight.yangtools.yang.data.impl.schema.builder.api.DataContainerNodeAttrBuilder;
  61 import org.opendaylight.yangtools.yang.data.impl.schema.builder.api.DataContainerNodeBuilder;
  62 import org.opendaylight.yangtools.yang.data.impl.schema.builder.impl.ImmutableMapNodeBuilder;
  63 import org.slf4j.Logger;
  64 import org.slf4j.LoggerFactory;
  65 /**
  66  * Writer of Adjacency-RIB-In for a single peer. An instance of this object
  67  * is attached to each {@link BGPPeer} and {@link ApplicationPeer}.
  68  */
  69 @NotThreadSafe
  70 final class AdjRibInWriter {
  71     private static final Logger LOG = LoggerFactory.getLogger(AdjRibInWriter.class);
  72     @VisibleForTesting
  73     static final LeafNode<Boolean> ATTRIBUTES_UPTODATE_FALSE = ImmutableNodes.leafNode(QName.create(Attributes.QNAME, "uptodate"), Boolean.FALSE);
  74     private static final LeafNode<Boolean> ATTRIBUTES_UPTODATE_TRUE = ImmutableNodes.leafNode(ATTRIBUTES_UPTODATE_FALSE.getNodeType(), Boolean.TRUE);
  75     @VisibleForTesting
  76     static final QName PEER_ID_QNAME = QName.create(Peer.QNAME, "peer-id").intern();
  77     private static final QName PEER_ROLE_QNAME = QName.create(Peer.QNAME, "peer-role").intern();
  78     private static final NodeIdentifier ADJRIBIN = new NodeIdentifier(AdjRibIn.QNAME);
  79     private static final NodeIdentifier ADJRIBOUT = new NodeIdentifier(AdjRibOut.QNAME);
  80     private static final NodeIdentifier EFFRIBIN = new NodeIdentifier(EffectiveRibIn.QNAME);
  81     private static final NodeIdentifier PEER_ID = new NodeIdentifier(PEER_ID_QNAME);
  82     private static final NodeIdentifier PEER_ROLE = new NodeIdentifier(PEER_ROLE_QNAME);
  83     private static final NodeIdentifier PEER_TABLES = new NodeIdentifier(SupportedTables.QNAME);
  84     private static final NodeIdentifier TABLES = new NodeIdentifier(Tables.QNAME);
  85     private static final QName SEND_RECEIVE = QName.create(SupportedTables.QNAME, "send-receive").intern();
  86     private static final NodeIdentifier SIMPLE_ROUTING_POLICY_NID = new NodeIdentifier(QName.create(Peer.QNAME, "simple-routing-policy").intern());
  87
  88     // FIXME: is there a utility method to construct this?
  89     private static final ContainerNode EMPTY_ADJRIBIN = Builders.containerBuilder().withNodeIdentifier(ADJRIBIN).addChild(ImmutableNodes.mapNodeBuilder(Tables.QNAME).build()).build();
  90     private static final ContainerNode EMPTY_EFFRIBIN = Builders.containerBuilder().withNodeIdentifier(EFFRIBIN).addChild(ImmutableNodes.mapNodeBuilder(Tables.QNAME).build()).build();
  91     private static final ContainerNode EMPTY_ADJRIBOUT = Builders.containerBuilder().withNodeIdentifier(ADJRIBOUT).addChild(ImmutableNodes.mapNodeBuilder(Tables.QNAME).build()).build();
  92
  93     private final Map<TablesKey, TableContext> tables;
  94     private final YangInstanceIdentifier peerPath;
  95     private final YangInstanceIdentifier ribPath;
  96     private final DOMTransactionChain chain;
  97     private final PeerRole role;
  98     private final Optional<SimpleRoutingPolicy> simpleRoutingPolicy;
  99
 100     private AdjRibInWriter(final YangInstanceIdentifier ribPath, final DOMTransactionChain chain, final PeerRole role,
 101         final Optional<SimpleRoutingPolicy> simpleRoutingPolicy, final YangInstanceIdentifier peerPath, final Map<TablesKey, TableContext> tables) {
 102         this.ribPath = requireNonNull(ribPath);
 103         this.chain = requireNonNull(chain);
 104         this.tables = requireNonNull(tables);
 105         this.role = requireNonNull(role);
 106         this.simpleRoutingPolicy = simpleRoutingPolicy;
 107         this.peerPath = peerPath;
 108     }
 109
 110     /**
 111      * Create a new writer using a transaction chain.
 112      *
 113      * @param role peer's role
 114      * @param simpleRoutingPolicy simple Routing Policy {@link SimpleRoutingPolicy}
 115      *@param chain transaction chain  @return A fresh writer instance
 116      */
 117     static AdjRibInWriter create(@Nonnull final YangInstanceIdentifier ribId, @Nonnull final PeerRole role,
 118         final Optional<SimpleRoutingPolicy> simpleRoutingPolicy, @Nonnull final DOMTransactionChain chain) {
 119         return new AdjRibInWriter(ribId, chain, role, simpleRoutingPolicy, null, Collections.emptyMap());
 120     }
 121
 122     /**
 123      * Transform this writer to a new writer, which is in charge of specified tables.
 124      * Empty tables are created for new entries and old tables are deleted. Once this
 125      * method returns, the old instance must not be reasonably used.
 126      *
 127      * @param newPeerId new peer BGP identifier
 128      * @param registry RIB extension registry
 129      * @param tableTypes New tables, must not be null
 130      * @param addPathTablesType
 131      * @return New writer
 132      */
 133     AdjRibInWriter transform(final PeerId newPeerId, final RIBSupportContextRegistry registry,
 134         final Set<TablesKey> tableTypes, final Map<TablesKey, SendReceive> addPathTablesType) {
 135         return transform(newPeerId, registry, tableTypes, addPathTablesType, null);
 136     }
 137
 138     AdjRibInWriter transform(final PeerId newPeerId, final RIBSupportContextRegistry registry, final Set<TablesKey> tableTypes,
 139         final Map<TablesKey, SendReceive> addPathTablesType, @Nullable final RegisterAppPeerListener registerAppPeerListener) {
 140         final DOMDataWriteTransaction tx = this.chain.newWriteOnlyTransaction();
 141
 142         final YangInstanceIdentifier newPeerPath;
 143         newPeerPath = createEmptyPeerStructure(newPeerId, tx);
 144         final ImmutableMap<TablesKey, TableContext> tb = createNewTableInstances(newPeerPath, registry, tableTypes,
 145             addPathTablesType, tx);
 146
 147         Futures.addCallback(tx.submit(), new FutureCallback<Void>() {
 148             @Override
 149             public void onSuccess(final Void result) {
 150                 if(registerAppPeerListener != null) {
 151                     LOG.trace("Application Peer Listener registered");
 152                     registerAppPeerListener.register();
 153                 }
 154             }
 155
 156             @Override
 157             public void onFailure(final Throwable throwable) {
 158                 if(registerAppPeerListener != null) {
 159                     LOG.error("Failed to create Empty Structure, Application Peer Listener won't be registered",
 160                         throwable);
 161                 } else {
 162                     LOG.error("Failed to create Empty Structure", throwable);
 163                 }
 164             }
 165         }, MoreExecutors.directExecutor());
 166         return new AdjRibInWriter(this.ribPath, this.chain, this.role, this.simpleRoutingPolicy, newPeerPath, tb);
 167     }
 168
 169     /**
 170      * Create new table instances, potentially creating their empty entries
 171      * @param newPeerPath
 172      * @param registry
 173      * @param tableTypes
 174      * @param addPathTablesType
 175      * @param tx
 176      * @return
 177      */
 178     private ImmutableMap<TablesKey, TableContext> createNewTableInstances(final YangInstanceIdentifier newPeerPath,
 179         final RIBSupportContextRegistry registry, final Set<TablesKey> tableTypes, final Map<TablesKey, SendReceive> addPathTablesType,
 180         final DOMDataWriteTransaction tx) {
 181
 182         final Builder<TablesKey, TableContext> tb = ImmutableMap.builder();
 183         for (final TablesKey tableKey : tableTypes) {
 184             final RIBSupportContext rs = registry.getRIBSupportContext(tableKey);
 185             // TODO: Use returned value once Instance Identifier builder allows for it.
 186             final NodeIdentifierWithPredicates instanceIdentifierKey = RibSupportUtils.toYangTablesKey(tableKey);
 187             if (rs == null) {
 188                 LOG.warn("No support for table type {}, skipping it", tableKey);
 189                 continue;
 190             }
 191             installAdjRibsOutTables(newPeerPath, rs, instanceIdentifierKey, tableKey, addPathTablesType.get(tableKey), tx);
 192             installAdjRibInTables(newPeerPath, tableKey, rs, instanceIdentifierKey, tx, tb);
 193         }
 194         return tb.build();
 195     }
 196
 197     private static void installAdjRibInTables(final YangInstanceIdentifier newPeerPath, final TablesKey tableKey,
 198             final RIBSupportContext rs, final NodeIdentifierWithPredicates instanceIdentifierKey,
 199             final DOMDataWriteTransaction tx, final Builder<TablesKey, TableContext> tb) {
 200         // We will use table keys very often, make sure they are optimized
 201         final InstanceIdentifierBuilder idb = YangInstanceIdentifier.builder(newPeerPath.node(EMPTY_ADJRIBIN.getIdentifier()).node(TABLES));
 202         idb.nodeWithKey(instanceIdentifierKey.getNodeType(), instanceIdentifierKey.getKeyValues());
 203
 204         final TableContext ctx = new TableContext(rs, idb.build());
 205         ctx.createEmptyTableStructure(tx);
 206
 207         tx.merge(LogicalDatastoreType.OPERATIONAL, ctx.getTableId().node(Attributes.QNAME).node(ATTRIBUTES_UPTODATE_FALSE.getNodeType()), ATTRIBUTES_UPTODATE_FALSE);
 208         LOG.debug("Created table instance {}", ctx.getTableId());
 209         tb.put(tableKey, ctx);
 210     }
 211
 212     private void installAdjRibsOutTables(final YangInstanceIdentifier newPeerPath, final RIBSupportContext rs,
 213         final NodeIdentifierWithPredicates instanceIdentifierKey, final TablesKey tableKey, final SendReceive sendReceive,
 214         final DOMDataWriteTransaction tx) {
 215         if (!isAnnounceNone(this.simpleRoutingPolicy)) {
 216             final NodeIdentifierWithPredicates supTablesKey = RibSupportUtils.toYangKey(SupportedTables.QNAME, tableKey);
 217             final DataContainerNodeAttrBuilder<NodeIdentifierWithPredicates, MapEntryNode> tt = Builders.mapEntryBuilder().withNodeIdentifier(supTablesKey);
 218             for (final Entry<QName, Object> e : supTablesKey.getKeyValues().entrySet()) {
 219                 tt.withChild(ImmutableNodes.leafNode(e.getKey(), e.getValue()));
 220             }
 221             if(sendReceive != null) {
 222                 tt.withChild(ImmutableNodes.leafNode(SEND_RECEIVE, sendReceive.toString().toLowerCase()));
 223             }
 224             tx.put(LogicalDatastoreType.OPERATIONAL, newPeerPath.node(PEER_TABLES).node(supTablesKey), tt.build());
 225             rs.createEmptyTableStructure(tx, newPeerPath.node(EMPTY_ADJRIBOUT.getIdentifier()).node(TABLES).node(instanceIdentifierKey));
 226         }
 227     }
 228
 229     private YangInstanceIdentifier createEmptyPeerStructure(final PeerId newPeerId, final DOMDataWriteTransaction tx) {
 230         final NodeIdentifierWithPredicates peerKey = IdentifierUtils.domPeerId(newPeerId);
 231         final YangInstanceIdentifier newPeerPath = this.ribPath.node(Peer.QNAME).node(peerKey);
 232
 233         tx.put(LogicalDatastoreType.OPERATIONAL, newPeerPath, peerSkeleton(peerKey, newPeerId.getValue()));
 234         LOG.debug("New peer {} structure installed.", newPeerPath);
 235         return newPeerPath;
 236     }
 237
 238     @VisibleForTesting
 239     MapEntryNode peerSkeleton(final NodeIdentifierWithPredicates peerKey, final String peerId) {
 240         final DataContainerNodeBuilder<NodeIdentifierWithPredicates, MapEntryNode> pb = Builders.mapEntryBuilder();
 241         pb.withNodeIdentifier(peerKey);
 242         pb.withChild(ImmutableNodes.leafNode(PEER_ID, peerId));
 243         pb.withChild(ImmutableNodes.leafNode(PEER_ROLE, PeerRoleUtil.roleForString(this.role)));
 244         if (this.simpleRoutingPolicy.isPresent() && this.role != PeerRole.Internal) {
 245             pb.withChild(ImmutableNodes.leafNode(SIMPLE_ROUTING_POLICY_NID, simpleRoutingPolicyString(this.simpleRoutingPolicy.get())));
 246         }
 247         pb.withChild(ImmutableMapNodeBuilder.create().withNodeIdentifier(PEER_TABLES).build());
 248         pb.withChild(EMPTY_ADJRIBIN);
 249         if(!isLearnNone(this.simpleRoutingPolicy)) {
 250             pb.withChild(EMPTY_EFFRIBIN);
 251         }
 252         if (!isAnnounceNone(this.simpleRoutingPolicy)) {
 253             pb.withChild(EMPTY_ADJRIBOUT);
 254         }
 255         return pb.build();
 256     }
 257
 258     ListenableFuture<Void> removePeer() {
 259         if(this.peerPath != null) {
 260             final DOMDataWriteTransaction tx = this.chain.newWriteOnlyTransaction();
 261             tx.delete(LogicalDatastoreType.OPERATIONAL, this.peerPath);
 262             final ListenableFuture<Void> future = tx.submit();
 263             Futures.addCallback(future, new FutureCallback<Void>() {
 264                 @Override
 265                 public void onSuccess(final Void result) {
 266                     LOG.debug("Peer {} removed", AdjRibInWriter.this.peerPath);
 267                 }
 268
 269                 @Override
 270                 public void onFailure(final Throwable t) {
 271                     LOG.warn("Failed to remove Peer {}", AdjRibInWriter.this.peerPath, t);
 272                 }
 273             }, MoreExecutors.directExecutor());
 274             return future;
 275         }
 276         return Futures.immediateFuture(null);
 277     }
 278
 279     void markTableUptodate(final TablesKey tableTypes) {
 280         final DOMDataWriteTransaction tx = this.chain.newWriteOnlyTransaction();
 281         final TableContext ctx = this.tables.get(tableTypes);
 282         tx.merge(LogicalDatastoreType.OPERATIONAL, ctx.getTableId().node(Attributes.QNAME).node(ATTRIBUTES_UPTODATE_TRUE.getNodeType()), ATTRIBUTES_UPTODATE_TRUE);
 283         tx.submit();
 284     }
 285
 286     void updateRoutes(final MpReachNlri nlri, final org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.message.rev130919.path.attributes.Attributes attributes) {
 287         final TablesKey key = new TablesKey(nlri.getAfi(), nlri.getSafi());
 288         final TableContext ctx = this.tables.get(key);
 289         if (ctx == null) {
 290             LOG.debug("No table for {}, not accepting NLRI {}", key, nlri);
 291             return;
 292         }
 293
 294         final DOMDataWriteTransaction tx = this.chain.newWriteOnlyTransaction();
 295         ctx.writeRoutes(tx, nlri, attributes);
 296         LOG.trace("Write routes {}", nlri);
 297         tx.submit();
 298     }
 299
 300     void removeRoutes(final MpUnreachNlri nlri) {
 301         final TablesKey key = new TablesKey(nlri.getAfi(), nlri.getSafi());
 302         final TableContext ctx = this.tables.get(key);
 303         if (ctx == null) {
 304             LOG.debug("No table for {}, not accepting NLRI {}", key, nlri);
 305             return;
 306         }
 307         LOG.trace("Removing routes {}", nlri);
 308         final DOMDataWriteTransaction tx = this.chain.newWriteOnlyTransaction();
 309         ctx.removeRoutes(tx, nlri);
 310         tx.submit();
 311     }
 312
 313     static boolean isAnnounceNone(final java.util.Optional<SimpleRoutingPolicy> peerStatus) {
 314         return peerStatus.isPresent() && peerStatus.get() == SimpleRoutingPolicy.AnnounceNone;
 315     }
 316
 317     static boolean isLearnNone(final java.util.Optional<SimpleRoutingPolicy> peerStatus) {
 318         return peerStatus.isPresent() && peerStatus.get() == SimpleRoutingPolicy.LearnNone;
 319     }
 320
 321     private static String simpleRoutingPolicyString(final SimpleRoutingPolicy simpleRoutingPolicy) {
 322         switch (simpleRoutingPolicy) {
 323         case AnnounceNone:
 324             return "announce-none";
 325         case LearnNone:
 326             return "learn-none";
 327         default:
 328             throw new IllegalArgumentException("Unhandled Simple Routing Policy " + simpleRoutingPolicy);
 329         }
 330     }
 331 }