| /* |
| * Copyright 2014 Open Networking Laboratory |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| package org.onosproject.net.intent.impl; |
| |
| import com.google.common.collect.ImmutableSet; |
| import com.google.common.collect.Lists; |
| import org.apache.felix.scr.annotations.Activate; |
| import org.apache.felix.scr.annotations.Component; |
| import org.apache.felix.scr.annotations.Deactivate; |
| import org.apache.felix.scr.annotations.Reference; |
| import org.apache.felix.scr.annotations.ReferenceCardinality; |
| import org.onosproject.core.ApplicationId; |
| import org.onosproject.core.CoreService; |
| import org.onosproject.core.DefaultGroupId; |
| import org.onosproject.net.ConnectPoint; |
| import org.onosproject.net.Link; |
| import org.onosproject.net.flow.DefaultFlowRule; |
| import org.onosproject.net.flow.DefaultTrafficSelector; |
| import org.onosproject.net.flow.FlowRule; |
| import org.onosproject.net.flow.FlowRuleOperation; |
| import org.onosproject.net.flow.TrafficSelector; |
| import org.onosproject.net.flow.TrafficTreatment; |
| import org.onosproject.net.intent.Constraint; |
| import org.onosproject.net.intent.IntentExtensionService; |
| import org.onosproject.net.intent.IntentInstaller; |
| import org.onosproject.net.intent.PathIntent; |
| import org.onosproject.net.resource.DefaultLinkResourceRequest; |
| import org.onosproject.net.resource.LinkResourceAllocations; |
| import org.onosproject.net.resource.LinkResourceRequest; |
| import org.onosproject.net.resource.LinkResourceService; |
| import org.slf4j.Logger; |
| |
| import java.util.Collection; |
| import java.util.Iterator; |
| import java.util.List; |
| |
| import static org.onosproject.net.flow.DefaultTrafficTreatment.builder; |
| import static org.slf4j.LoggerFactory.getLogger; |
| |
| /** |
| * Installer for {@link PathIntent packet path connectivity intents}. |
| */ |
| @Component(immediate = true) |
| public class PathIntentInstaller implements IntentInstaller<PathIntent> { |
| |
| private final Logger log = getLogger(getClass()); |
| |
| @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY) |
| protected IntentExtensionService intentManager; |
| |
| @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY) |
| protected CoreService coreService; |
| |
| @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY) |
| protected LinkResourceService resourceService; |
| |
| protected ApplicationId appId; |
| |
| @Activate |
| public void activate() { |
| appId = coreService.registerApplication("org.onosproject.net.intent"); |
| intentManager.registerInstaller(PathIntent.class, this); |
| } |
| |
| @Deactivate |
| public void deactivate() { |
| intentManager.unregisterInstaller(PathIntent.class); |
| } |
| |
| @Override |
| public List<Collection<FlowRuleOperation>> install(PathIntent intent) { |
| LinkResourceAllocations allocations = allocateResources(intent); |
| |
| TrafficSelector.Builder builder = |
| DefaultTrafficSelector.builder(intent.selector()); |
| Iterator<Link> links = intent.path().links().iterator(); |
| ConnectPoint prev = links.next().dst(); |
| List<FlowRuleOperation> rules = Lists.newLinkedList(); |
| // TODO Generate multiple batches |
| while (links.hasNext()) { |
| builder.matchInPort(prev.port()); |
| Link link = links.next(); |
| // if this is the last flow rule, apply the intent's treatments |
| TrafficTreatment treatment = |
| (links.hasNext() ? builder() : builder(intent.treatment())) |
| .setOutput(link.src().port()).build(); |
| |
| FlowRule rule = new DefaultFlowRule(link.src().deviceId(), |
| builder.build(), treatment, 123, //FIXME 123 |
| appId, |
| new DefaultGroupId((short) (intent.id().fingerprint() & 0xffff)), |
| 0, true); |
| rules.add(new FlowRuleOperation(rule, FlowRuleOperation.Type.ADD)); |
| prev = link.dst(); |
| } |
| |
| return Lists.newArrayList(ImmutableSet.of(rules)); |
| } |
| |
| @Override |
| public List<Collection<FlowRuleOperation>> uninstall(PathIntent intent) { |
| deallocateResources(intent); |
| TrafficSelector.Builder builder = |
| DefaultTrafficSelector.builder(intent.selector()); |
| Iterator<Link> links = intent.path().links().iterator(); |
| ConnectPoint prev = links.next().dst(); |
| List<FlowRuleOperation> rules = Lists.newLinkedList(); |
| // TODO Generate multiple batches |
| while (links.hasNext()) { |
| builder.matchInPort(prev.port()); |
| Link link = links.next(); |
| // if this is the last flow rule, apply the intent's treatments |
| TrafficTreatment treatment = |
| (links.hasNext() ? builder() : builder(intent.treatment())) |
| .setOutput(link.src().port()).build(); |
| FlowRule rule = new DefaultFlowRule(link.src().deviceId(), |
| builder.build(), treatment, 123, appId, |
| new DefaultGroupId((short) (intent.id().fingerprint() & 0xffff)), |
| 0, true); |
| rules.add(new FlowRuleOperation(rule, FlowRuleOperation.Type.REMOVE)); |
| prev = link.dst(); |
| } |
| // FIXME this should change to new api |
| return Lists.newArrayList(ImmutableSet.of(rules)); |
| } |
| |
| @Override |
| public List<Collection<FlowRuleOperation>> replace(PathIntent oldIntent, PathIntent newIntent) { |
| // FIXME: implement this |
| List<Collection<FlowRuleOperation>> batches = Lists.newArrayList(); |
| batches.addAll(uninstall(oldIntent)); |
| batches.addAll(install(newIntent)); |
| return batches; |
| } |
| |
| /** |
| * Allocate resources required for an intent. |
| * |
| * @param intent intent to allocate resource for |
| * @return allocated resources if any are required, null otherwise |
| */ |
| private LinkResourceAllocations allocateResources(PathIntent intent) { |
| LinkResourceRequest.Builder builder = |
| DefaultLinkResourceRequest.builder(intent.id(), intent.path().links()); |
| for (Constraint constraint : intent.constraints()) { |
| builder.addConstraint(constraint); |
| } |
| LinkResourceRequest request = builder.build(); |
| return request.resources().isEmpty() ? null : resourceService.requestResources(request); |
| } |
| |
| /** |
| * Deallocate resources held by an intent. |
| * |
| * @param intent intent to deallocate resources for |
| */ |
| private void deallocateResources(PathIntent intent) { |
| if (intent.constraints().isEmpty()) { |
| return; |
| } |
| |
| LinkResourceAllocations allocatedResources = resourceService.getAllocations(intent.id()); |
| if (allocatedResources != null) { |
| resourceService.releaseResources(allocatedResources); |
| } |
| } |
| } |