2 * Copyright (c) 2015 Cisco Systems, Inc. and others. All rights reserved.
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
8 package org.opendaylight.protocol.bgp.rib.impl;
10 import com.google.common.base.Optional;
11 import com.google.common.base.Preconditions;
12 import com.google.common.primitives.UnsignedInteger;
13 import java.util.Arrays;
14 import java.util.Collection;
15 import java.util.HashMap;
17 import java.util.Map.Entry;
18 import javax.annotation.Nonnull;
19 import javax.annotation.concurrent.NotThreadSafe;
20 import org.opendaylight.controller.md.sal.common.api.data.LogicalDatastoreType;
21 import org.opendaylight.controller.md.sal.dom.api.DOMDataTreeChangeListener;
22 import org.opendaylight.controller.md.sal.dom.api.DOMDataTreeChangeService;
23 import org.opendaylight.controller.md.sal.dom.api.DOMDataTreeIdentifier;
24 import org.opendaylight.controller.md.sal.dom.api.DOMDataWriteTransaction;
25 import org.opendaylight.controller.md.sal.dom.api.DOMTransactionChain;
26 import org.opendaylight.protocol.bgp.rib.impl.spi.RIBSupportContext;
27 import org.opendaylight.protocol.bgp.rib.impl.spi.RIBSupportContextRegistry;
28 import org.opendaylight.protocol.bgp.rib.spi.RIBSupport;
29 import org.opendaylight.protocol.bgp.rib.spi.RibSupportUtils;
30 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.inet.types.rev100924.AsNumber;
31 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.rib.rev130925.PeerId;
32 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.rib.rev130925.PeerRole;
33 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.rib.rev130925.bgp.rib.rib.LocRib;
34 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.rib.rev130925.bgp.rib.rib.Peer;
35 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.rib.rev130925.bgp.rib.rib.peer.AdjRibOut;
36 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.rib.rev130925.bgp.rib.rib.peer.EffectiveRibIn;
37 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.rib.rev130925.rib.Tables;
38 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.rib.rev130925.rib.TablesKey;
39 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.rib.rev130925.rib.tables.Attributes;
40 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.rib.rev130925.rib.tables.Routes;
41 import org.opendaylight.yangtools.concepts.ListenerRegistration;
42 import org.opendaylight.yangtools.yang.common.QName;
43 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier;
44 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier.NodeIdentifier;
45 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier.NodeIdentifierWithPredicates;
46 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier.PathArgument;
47 import org.opendaylight.yangtools.yang.data.api.schema.ContainerNode;
48 import org.opendaylight.yangtools.yang.data.api.schema.LeafNode;
49 import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNode;
50 import org.opendaylight.yangtools.yang.data.api.schema.tree.DataTreeCandidate;
51 import org.opendaylight.yangtools.yang.data.api.schema.tree.DataTreeCandidateNode;
52 import org.opendaylight.yangtools.yang.data.impl.schema.ImmutableNodes;
53 import org.slf4j.Logger;
54 import org.slf4j.LoggerFactory;
57 final class LocRibWriter implements AutoCloseable, DOMDataTreeChangeListener {
59 private static final Logger LOG = LoggerFactory.getLogger(LocRibWriter.class);
61 private static final LeafNode<Boolean> ATTRIBUTES_UPTODATE_TRUE = ImmutableNodes.leafNode(QName.create(Attributes.QNAME, "uptodate"), Boolean.TRUE);
62 private static final NodeIdentifier ROUTES_IDENTIFIER = new NodeIdentifier(Routes.QNAME);
63 private static final NodeIdentifier EFFRIBIN_NID = new NodeIdentifier(EffectiveRibIn.QNAME);
64 private static final NodeIdentifier TABLES_NID = new NodeIdentifier(Tables.QNAME);
66 private final Map<PathArgument, AbstractRouteEntry> routeEntries = new HashMap<>();
67 private final YangInstanceIdentifier locRibTarget;
68 private final DOMTransactionChain chain;
69 private final ExportPolicyPeerTracker peerPolicyTracker;
70 private final NodeIdentifier attributesIdentifier;
71 private final Long ourAs;
72 private final RIBSupport ribSupport;
73 private final NodeIdentifierWithPredicates tableKey;
74 private final RIBSupportContextRegistry registry;
75 private final ListenerRegistration<LocRibWriter> reg;
77 LocRibWriter(final RIBSupportContextRegistry registry, final DOMTransactionChain chain, final YangInstanceIdentifier target, final Long ourAs,
78 final DOMDataTreeChangeService service, final PolicyDatabase pd, final TablesKey tablesKey) {
79 this.chain = Preconditions.checkNotNull(chain);
80 this.tableKey = RibSupportUtils.toYangTablesKey(tablesKey);
81 this.locRibTarget = YangInstanceIdentifier.create(target.node(LocRib.QNAME).node(Tables.QNAME).node(this.tableKey).getPathArguments());
82 this.ourAs = Preconditions.checkNotNull(ourAs);
83 this.registry = registry;
84 this.ribSupport = this.registry.getRIBSupportContext(tablesKey).getRibSupport();
85 this.attributesIdentifier = this.ribSupport.routeAttributesIdentifier();
86 this.peerPolicyTracker = new ExportPolicyPeerTracker(pd);
88 final DOMDataWriteTransaction tx = this.chain.newWriteOnlyTransaction();
89 tx.merge(LogicalDatastoreType.OPERATIONAL, this.locRibTarget.node(Routes.QNAME), this.ribSupport.emptyRoutes());
90 tx.merge(LogicalDatastoreType.OPERATIONAL, this.locRibTarget.node(Attributes.QNAME).node(ATTRIBUTES_UPTODATE_TRUE.getNodeType()), ATTRIBUTES_UPTODATE_TRUE);
93 final YangInstanceIdentifier tableId = target.node(Peer.QNAME).node(Peer.QNAME);
95 this.reg = service.registerDataTreeChangeListener(new DOMDataTreeIdentifier(LogicalDatastoreType.OPERATIONAL, tableId), this);
98 public static LocRibWriter create(@Nonnull final RIBSupportContextRegistry registry, @Nonnull final TablesKey tablesKey, @Nonnull final DOMTransactionChain chain, @Nonnull final YangInstanceIdentifier target,
99 @Nonnull final AsNumber ourAs, @Nonnull final DOMDataTreeChangeService service, @Nonnull final PolicyDatabase pd) {
100 return new LocRibWriter(registry, chain, target, ourAs.getValue(), service, pd, tablesKey);
104 public void close() {
106 // FIXME: wipe the local rib
107 // FIXME: wait for the chain to close? unfortunately RIBImpl is the listener, so that may require some work
111 @Nonnull private AbstractRouteEntry createEntry(final PathArgument routeId) {
112 final AbstractRouteEntry ret = this.ribSupport.isComplexRoute() ? new ComplexRouteEntry() : new SimpleRouteEntry();
114 this.routeEntries.put(routeId, ret);
115 LOG.trace("Created new entry for {}", routeId);
120 public void onDataTreeChanged(final Collection<DataTreeCandidate> changes) {
121 final DOMDataWriteTransaction tx = this.chain.newWriteOnlyTransaction();
122 LOG.trace("Received data change to LocRib {}", Arrays.toString(changes.toArray()));
124 * We use two-stage processing here in hopes that we avoid duplicate
125 * calculations when multiple peers have changed a particular entry.
127 final Map<RouteUpdateKey, AbstractRouteEntry> toUpdate = new HashMap<>();
128 update(tx, changes, toUpdate);
130 // Now walk all updated entries
131 walkThrough(tx, toUpdate);
136 private void update(final DOMDataWriteTransaction tx, final Collection<DataTreeCandidate> changes,
137 final Map<RouteUpdateKey, AbstractRouteEntry> toUpdate) {
139 for (final DataTreeCandidate tc : changes) {
140 // call out peer-role has changed
141 final YangInstanceIdentifier rootPath = tc.getRootPath();
142 final DataTreeCandidateNode rootNode = tc.getRootNode();
143 final DataTreeCandidateNode roleChange = rootNode.getModifiedChild(AbstractPeerRoleTracker.PEER_ROLE_NID);
144 if (roleChange != null) {
145 this.peerPolicyTracker.onDataTreeChanged(roleChange, IdentifierUtils.peerPath(rootPath));
147 // filter out any change outside EffRibsIn
148 final DataTreeCandidateNode ribIn = rootNode.getModifiedChild(EFFRIBIN_NID);
150 LOG.debug("Skipping change {}", tc.getRootNode());
153 final DataTreeCandidateNode table = ribIn.getModifiedChild(TABLES_NID).getModifiedChild(this.tableKey);
155 LOG.debug("Skipping change {}", tc.getRootNode());
158 final NodeIdentifierWithPredicates peerKey = IdentifierUtils.peerKey(rootPath);
159 final PeerId peerId = IdentifierUtils.peerId(peerKey);
160 final UnsignedInteger routerId = RouterIds.routerIdForPeerId(peerId);
161 for (final DataTreeCandidateNode child : table.getChildNodes()) {
162 if ((Attributes.QNAME).equals(child.getIdentifier().getNodeType())) {
163 if (child.getDataAfter().isPresent()) {
164 // putting uptodate attribute in
165 LOG.trace("Uptodate found for {}", child.getDataAfter());
166 tx.put(LogicalDatastoreType.OPERATIONAL, this.locRibTarget.node(child.getIdentifier()), child.getDataAfter().get());
170 for (final DataTreeCandidateNode route : this.ribSupport.changedRoutes(child)) {
171 final PathArgument routeId = route.getIdentifier();
172 AbstractRouteEntry entry = this.routeEntries.get(routeId);
174 final Optional<NormalizedNode<?, ?>> maybeData = route.getDataAfter();
175 if (maybeData.isPresent()) {
177 entry = createEntry(routeId);
180 entry.addRoute(routerId, this.attributesIdentifier, maybeData.get());
181 } else if (entry != null && entry.removeRoute(routerId)) {
182 this.routeEntries.remove(routeId);
184 LOG.trace("Removed route from {}", routerId);
186 LOG.debug("Updated route {} entry {}", routeId, entry);
187 toUpdate.put(new RouteUpdateKey(peerId, routeId), entry);
193 private void walkThrough(final DOMDataWriteTransaction tx, final Map<RouteUpdateKey, AbstractRouteEntry> toUpdate) {
194 for (final Entry<RouteUpdateKey, AbstractRouteEntry> e : toUpdate.entrySet()) {
195 LOG.trace("Walking through {}", e);
196 final AbstractRouteEntry entry = e.getValue();
197 final RouteUpdateKey key = e.getKey();
198 final NormalizedNode<?, ?> value;
201 if (!entry.selectBest(this.ourAs)) {
202 // Best path has not changed, no need to do anything else. Proceed to next route.
203 LOG.trace("Continuing");
206 value = entry.createValue(key.getRouteId());
207 LOG.trace("Selected best value {}", value);
212 final YangInstanceIdentifier writePath = this.ribSupport.routePath(this.locRibTarget.node(ROUTES_IDENTIFIER), key.getRouteId());
214 LOG.debug("Write route to LocRib {}", value);
215 tx.put(LogicalDatastoreType.OPERATIONAL, writePath, value);
217 LOG.debug("Delete route from LocRib {}", entry);
218 tx.delete(LogicalDatastoreType.OPERATIONAL, writePath);
220 fillAdjRibsOut(tx, entry, value, key);
224 private void fillAdjRibsOut(final DOMDataWriteTransaction tx, final AbstractRouteEntry entry, final NormalizedNode<?, ?> value, final RouteUpdateKey key) {
226 * We need to keep track of routers and populate adj-ribs-out, too. If we do not, we need to
227 * expose from which client a particular route was learned from in the local RIB, and have
228 * the listener perform filtering.
230 * We walk the policy set in order to minimize the amount of work we do for multiple peers:
231 * if we have two eBGP peers, for example, there is no reason why we should perform the translation
234 for (final PeerRole role : PeerRole.values()) {
235 final PeerExportGroup peerGroup = this.peerPolicyTracker.getPeerGroup(role);
236 if (peerGroup != null) {
237 final ContainerNode attributes = entry == null ? null : entry.attributes();
238 final PeerId peerId = key.getPeerId();
239 final ContainerNode effectiveAttributes = peerGroup.effectiveAttributes(peerId, attributes);
240 for (final Entry<PeerId, YangInstanceIdentifier> pid : peerGroup.getPeers()) {
241 // This points to adj-rib-out for a particular peer/table combination
242 final RIBSupportContext ribCtx = this.registry.getRIBSupportContext(this.tableKey);
243 // FIXME: the table should be created for a peer only once
244 ribCtx.clearTable(tx, pid.getValue().node(AdjRibOut.QNAME).node(Tables.QNAME).node(this.tableKey));
245 final YangInstanceIdentifier routeTarget = this.ribSupport.routePath(pid.getValue().node(AdjRibOut.QNAME).node(Tables.QNAME).node(this.tableKey).node(ROUTES_IDENTIFIER), key.getRouteId());
246 if (effectiveAttributes != null && value != null && !peerId.equals(pid.getKey())) {
247 LOG.debug("Write route to AdjRibsOut {}", value);
248 tx.put(LogicalDatastoreType.OPERATIONAL, routeTarget, value);
249 tx.put(LogicalDatastoreType.OPERATIONAL, routeTarget.node(this.attributesIdentifier), effectiveAttributes);
251 LOG.trace("Removing {} from transaction", routeTarget);
252 tx.delete(LogicalDatastoreType.OPERATIONAL, routeTarget);