Fixing emulated ofdpa in cpqd switches. Due to cpqd bugs in dealing with Vlans a…

…nd MPLS labels simultaneously,
we cannot emulate correct behavior in the same driver. This checkin separates the emulation, with one
driver meant for MPLS with untagged packets, and the other meant for untagged/tagged VLAN packets without MPLS.

Change-Id: Ia6112f4d26c7b32c93e1db2e9b1ae4673c553d87

+/*
+ * Copyright 2015 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.driver.pipeline;
+
+import static org.slf4j.LoggerFactory.getLogger;
+
+import java.util.ArrayList;
+import java.util.Collection;
+import java.util.Collections;
+import java.util.Deque;
+import java.util.List;
+import org.onlab.packet.Ethernet;
+import org.onlab.packet.VlanId;
+import org.onosproject.core.ApplicationId;
+import org.onosproject.net.Port;
+import org.onosproject.net.PortNumber;
+import org.onosproject.net.behaviour.NextGroup;
+import org.onosproject.net.flow.DefaultFlowRule;
+import org.onosproject.net.flow.DefaultTrafficSelector;
+import org.onosproject.net.flow.DefaultTrafficTreatment;
+import org.onosproject.net.flow.FlowRule;
+import org.onosproject.net.flow.TrafficSelector;
+import org.onosproject.net.flow.TrafficTreatment;
+import org.onosproject.net.flow.criteria.Criteria;
+import org.onosproject.net.flow.criteria.Criterion;
+import org.onosproject.net.flow.criteria.EthCriterion;
+import org.onosproject.net.flow.criteria.EthTypeCriterion;
+import org.onosproject.net.flow.criteria.PortCriterion;
+import org.onosproject.net.flow.criteria.VlanIdCriterion;
+import org.onosproject.net.flow.instructions.Instruction;
+import org.onosproject.net.flow.instructions.Instructions.OutputInstruction;
+import org.onosproject.net.flowobjective.ForwardingObjective;
+import org.onosproject.net.flowobjective.ObjectiveError;
+import org.onosproject.net.group.Group;
+import org.onosproject.net.group.GroupKey;
+import org.slf4j.Logger;
+
+
+/**
+ * Driver for software switch emulation of the OFDPA 2.0 pipeline.
+ * The software switch is the CPqD OF 1.3 switch. Unfortunately the CPqD switch
+ * does not handle vlan tags and mpls labels simultaneously, which requires us
+ * to do some workarounds in the driver. This driver is meant for the use of
+ * the cpqd switch when MPLS is not a requirement from the ofdpa pipeline. As a
+ * result this driver correctly handles both incoming untagged and vlan-tagged
+ * packets.
+ *
+ */
+public class CpqdOFDPA2VlanPipeline extends CpqdOFDPA2Pipeline {
+
+    private final Logger log = getLogger(getClass());
+
+    /*
+     * Cpqd emulation does not handle vlan tags and mpls labels correctly.
+     * Since this driver does not deal with MPLS, there is no need for
+     * working around VLAN tags. In particular we do not pop off vlan tags in
+     * the middle of the pipeline.
+     *
+     * (non-Javadoc)
+     * @see org.onosproject.driver.pipeline.OFDPA2Pipeline#processEthDstFilter
+     */
+    @Override
+    protected List<FlowRule> processEthDstFilter(PortCriterion portCriterion,
+                                                 EthCriterion ethCriterion,
+                                                 VlanIdCriterion vidCriterion,
+                                                 VlanId assignedVlan,
+                                                 ApplicationId applicationId) {
+        //handling untagged packets via assigned VLAN
+        if (vidCriterion.vlanId() == VlanId.NONE) {
+            vidCriterion = (VlanIdCriterion) Criteria.matchVlanId(assignedVlan);
+        }
+        // ofdpa cannot match on ALL portnumber, so we need to use separate
+        // rules for each port.
+        List<PortNumber> portnums = new ArrayList<PortNumber>();
+        if (portCriterion.port() == PortNumber.ALL) {
+            for (Port port : deviceService.getPorts(deviceId)) {
+                if (port.number().toLong() > 0 && port.number().toLong() < OFPP_MAX) {
+                    portnums.add(port.number());
+                }
+            }
+        } else {
+            portnums.add(portCriterion.port());
+        }
+
+        List<FlowRule> rules = new ArrayList<FlowRule>();
+        for (PortNumber pnum : portnums) {
+            // for unicast IP packets
+            TrafficSelector.Builder selector = DefaultTrafficSelector.builder();
+            TrafficTreatment.Builder treatment = DefaultTrafficTreatment.builder();
+            selector.matchInPort(pnum);
+            selector.matchVlanId(vidCriterion.vlanId());
+            selector.matchEthType(Ethernet.TYPE_IPV4);
+            selector.matchEthDst(ethCriterion.mac());
+
+            treatment.transition(UNICAST_ROUTING_TABLE);
+            FlowRule rule = DefaultFlowRule.builder()
+                    .forDevice(deviceId)
+                    .withSelector(selector.build())
+                    .withTreatment(treatment.build())
+                    .withPriority(DEFAULT_PRIORITY)
+                    .fromApp(applicationId)
+                    .makePermanent()
+                    .forTable(TMAC_TABLE).build();
+            rules.add(rule);
+        }
+        return rules;
+    }
+
+    /*
+     * In the OF-DPA 2.0 pipeline, versatile forwarding objectives go to the
+     * ACL table. Since we do not pop off vlans in the TMAC table we can continue
+     * to match on vlans in the ACL table if necessary.
+     */
+    @Override
+    protected Collection<FlowRule> processVersatile(ForwardingObjective fwd) {
+        log.info("Processing versatile forwarding objective");
+
+        EthTypeCriterion ethType =
+                (EthTypeCriterion) fwd.selector().getCriterion(Criterion.Type.ETH_TYPE);
+        if (ethType == null) {
+            log.error("Versatile forwarding objective must include ethType");
+            fail(fwd, ObjectiveError.BADPARAMS);
+            return Collections.emptySet();
+        }
+        if (fwd.nextId() == null && fwd.treatment() == null) {
+            log.error("Forwarding objective {} from {} must contain "
+                    + "nextId or Treatment", fwd.selector(), fwd.appId());
+            return Collections.emptySet();
+        }
+
+        TrafficSelector.Builder sbuilder = DefaultTrafficSelector.builder();
+        fwd.selector().criteria().forEach(criterion -> {
+            if (criterion instanceof VlanIdCriterion) {
+                VlanId vlanId = ((VlanIdCriterion) criterion).vlanId();
+                // ensure that match does not include vlan = NONE as OF-DPA does not
+                // match untagged packets this way in the ACL table.
+                if (vlanId.equals(VlanId.NONE)) {
+                    return;
+                }
+            }
+            sbuilder.add(criterion);
+        });
+
+        // XXX driver does not currently do type checking as per Tables 65-67 in
+        // OFDPA 2.0 spec. The only allowed treatment is a punt to the controller.
+        TrafficTreatment.Builder ttBuilder = DefaultTrafficTreatment.builder();
+        if (fwd.treatment() != null) {
+            for (Instruction ins : fwd.treatment().allInstructions()) {
+                if (ins instanceof OutputInstruction) {
+                    OutputInstruction o = (OutputInstruction) ins;
+                    if (o.port() == PortNumber.CONTROLLER) {
+                        ttBuilder.add(o);
+                    } else {
+                        log.warn("Only allowed treatments in versatile forwarding "
+                                + "objectives are punts to the controller");
+                    }
+                } else {
+                    log.warn("Cannot process instruction in versatile fwd {}", ins);
+                }
+            }
+        }
+        if (fwd.nextId() != null) {
+            // overide case
+            NextGroup next = getGroupForNextObjective(fwd.nextId());
+            List<Deque<GroupKey>> gkeys = appKryo.deserialize(next.data());
+            // we only need the top level group's key to point the flow to it
+            Group group = groupService.getGroup(deviceId, gkeys.get(0).peekFirst());
+            if (group == null) {
+                log.warn("Group with key:{} for next-id:{} not found in dev:{}",
+                         gkeys.get(0).peekFirst(), fwd.nextId(), deviceId);
+                fail(fwd, ObjectiveError.GROUPMISSING);
+                return Collections.emptySet();
+            }
+            ttBuilder.deferred().group(group.id());
+        }
+
+        FlowRule.Builder ruleBuilder = DefaultFlowRule.builder()
+                .fromApp(fwd.appId())
+                .withPriority(fwd.priority())
+                .forDevice(deviceId)
+                .withSelector(sbuilder.build())
+                .withTreatment(ttBuilder.build())
+                .makePermanent()
+                .forTable(ACL_TABLE);
+        return Collections.singletonList(ruleBuilder.build());
+    }
+
+
+}

@@ -101,7 +101,7 @@ public class OFDPA2Pipeline extends AbstractHandlerBehaviour implements Pipeline
     protected static final int MAC_LEARNING_TABLE = 254;
     protected static final long OFPP_MAX = 0xffffff00L;
 
-    private static final int HIGHEST_PRIORITY = 0xffff;
+    protected static final int HIGHEST_PRIORITY = 0xffff;
     protected static final int DEFAULT_PRIORITY = 0x8000;
     protected static final int LOWEST_PRIORITY = 0x0;
 
@@ -125,7 +125,7 @@ public class OFDPA2Pipeline extends AbstractHandlerBehaviour implements Pipeline
 
     protected OFDPA2GroupHandler ofdpa2GroupHandler;
 
-    private Set<IPCriterion> sentIpFilters = Collections.newSetFromMap(
+    protected Set<IPCriterion> sentIpFilters = Collections.newSetFromMap(
                                                new ConcurrentHashMap<>());
 
     @Override
@@ -276,8 +276,8 @@ public class OFDPA2Pipeline extends AbstractHandlerBehaviour implements Pipeline
      * @param install   indicates whether to add or remove the objective
      * @param applicationId     the application that sent this objective
      */
-    private void processFilter(FilteringObjective filt,
-                               boolean install, ApplicationId applicationId) {
+    protected void processFilter(FilteringObjective filt,
+                                 boolean install, ApplicationId applicationId) {
         // This driver only processes filtering criteria defined with switch
         // ports as the key
         PortCriterion portCriterion = null;
@@ -357,7 +357,7 @@ public class OFDPA2Pipeline extends AbstractHandlerBehaviour implements Pipeline
             /*
              * NOTE: Separate vlan filtering rules and assignment rules
              * into different stage in order to guarantee that filtering rules
-             * always go first.
+             * always go first, as required by ofdpa.
              */
             List<FlowRule> allRules = processVlanIdFilter(
                     portCriterion, vidCriterion, assignedVlan, applicationId);
@@ -464,9 +464,11 @@ public class OFDPA2Pipeline extends AbstractHandlerBehaviour implements Pipeline
             selector.extension(ofdpaMatchVlanVid, deviceId);
             OfdpaSetVlanVid ofdpaSetVlanVid = new OfdpaSetVlanVid(assignedVlan);
             treatment.extension(ofdpaSetVlanVid, deviceId);
-            // XXX ofdpa will require an additional vlan match on the assigned vlan
-            // and it may not require the push. This is not in compliance with OF
-            // standard. Waiting on what the exact flows are going to look like.
+            // ofdpa requires an additional vlan match rule for the assigned vlan
+            // and it does not require the push when setting the assigned vlan.
+            // It also requires the extra rule to be sent to the switch before we
+            // send the untagged match rule.
+            // None of this in compliance with OF standard.
             storeVlan = assignedVlan;
 
             preSelector = DefaultTrafficSelector.builder();
@@ -630,7 +632,7 @@ public class OFDPA2Pipeline extends AbstractHandlerBehaviour implements Pipeline
      *             collection may be returned if there is a problem in processing
      *             the flow rule
      */
-    private Collection<FlowRule> processVersatile(ForwardingObjective fwd) {
+    protected Collection<FlowRule> processVersatile(ForwardingObjective fwd) {
         log.info("Processing versatile forwarding objective");
 
         EthTypeCriterion ethType =

@@ -141,6 +141,7 @@
             manufacturer="NoviFlow Inc" hwVersion="NS.*" swVersion="NW.*">
     </driver>
     <!--  Emulation of the ofdpa pipeline using a CPqD OF 1.3 software switch.
+       ~  Use this driver when MPLS functionality is required.
        ~  To use this driver, configure ONOS with the dpid of the device.
       -->
     <driver name="ofdpa-cpqd" extends="default"
@@ -149,6 +150,16 @@
         <behaviour api="org.onosproject.net.behaviour.Pipeliner"
                    impl="org.onosproject.driver.pipeline.CpqdOFDPA2Pipeline"/>
     </driver>
+    <!--  Emulation of the ofdpa pipeline using a CPqD OF 1.3 software switch.
+       ~  Use this driver when VLAN functionality is required.
+       ~  To use this driver, configure ONOS with the dpid of the device.
+      -->
+    <driver name="ofdpa-cpqd-vlan" extends="default"
+            manufacturer="ONF"
+            hwVersion="OF1.3 Software Switch from CPqD" swVersion="for Group Chaining">
+        <behaviour api="org.onosproject.net.behaviour.Pipeliner"
+                   impl="org.onosproject.driver.pipeline.CpqdOFDPA2VlanPipeline"/>
+    </driver>
     <driver name="calient" extends="default"
             manufacturer="calient inc" hwVersion="calient hardware"
             swVersion="ocs switch">