ONOS-7000 P4 tutorial application and P4 program
Change-Id: Ia0a6befa6374a1950485c1fba0cfacb5ff4ce52c
diff --git a/apps/p4-tutorial/pipeconf/src/main/java/org/onosproject/p4tutorial/pipeconf/PortStatisticsDiscoveryImpl.java b/apps/p4-tutorial/pipeconf/src/main/java/org/onosproject/p4tutorial/pipeconf/PortStatisticsDiscoveryImpl.java
new file mode 100644
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+++ b/apps/p4-tutorial/pipeconf/src/main/java/org/onosproject/p4tutorial/pipeconf/PortStatisticsDiscoveryImpl.java
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+/*
+ * Copyright 2017-present Open Networking Foundation
+ *
+ * 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.p4tutorial.pipeconf;
+
+import com.google.common.collect.Maps;
+import com.google.common.collect.Sets;
+import org.onosproject.net.DeviceId;
+import org.onosproject.net.device.DefaultPortStatistics;
+import org.onosproject.net.device.DeviceService;
+import org.onosproject.net.device.PortStatistics;
+import org.onosproject.net.device.PortStatisticsDiscovery;
+import org.onosproject.net.driver.AbstractHandlerBehaviour;
+import org.onosproject.net.pi.model.PiPipeconf;
+import org.onosproject.net.pi.runtime.PiCounterCellData;
+import org.onosproject.net.pi.runtime.PiCounterCellId;
+import org.onosproject.net.pi.runtime.PiCounterId;
+import org.onosproject.net.pi.runtime.PiIndirectCounterCellId;
+import org.onosproject.net.pi.runtime.PiPipeconfService;
+import org.onosproject.p4runtime.api.P4RuntimeClient;
+import org.onosproject.p4runtime.api.P4RuntimeController;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import java.util.Collection;
+import java.util.Collections;
+import java.util.Map;
+import java.util.Set;
+import java.util.concurrent.ExecutionException;
+import java.util.stream.Collectors;
+
+import static org.onosproject.net.pi.runtime.PiCounterType.INDIRECT;
+
+/**
+ * Implementation of the PortStatisticsDiscovery behaviour for the main.p4 program. This behaviour works by using a
+ * P4Runtime client to read the values of the ingress/egress port counters defined in the P4 program.
+ */
+public final class PortStatisticsDiscoveryImpl extends AbstractHandlerBehaviour implements PortStatisticsDiscovery {
+
+ private static final Logger log = LoggerFactory.getLogger(PortStatisticsDiscoveryImpl.class);
+
+ private static final PiCounterId INGRESS_COUNTER_ID = PiCounterId.of("igr_port_counter", INDIRECT);
+ private static final PiCounterId EGRESS_COUNTER_ID = PiCounterId.of("egr_port_counter", INDIRECT);
+
+ @Override
+ public Collection<PortStatistics> discoverPortStatistics() {
+
+ DeviceService deviceService = this.handler().get(DeviceService.class);
+ DeviceId deviceId = this.data().deviceId();
+
+ // Get a client for this device.
+ P4RuntimeController controller = handler().get(P4RuntimeController.class);
+ if (!controller.hasClient(deviceId)) {
+ log.warn("Unable to find client for {}, aborting operation", deviceId);
+ return Collections.emptyList();
+ }
+ P4RuntimeClient client = controller.getClient(deviceId);
+
+ // Get the pipeconf of this device.
+ PiPipeconfService piPipeconfService = handler().get(PiPipeconfService.class);
+ if (!piPipeconfService.ofDevice(deviceId).isPresent() ||
+ !piPipeconfService.getPipeconf(piPipeconfService.ofDevice(deviceId).get()).isPresent()) {
+ log.warn("Unable to get the pipeconf of {}, aborting operation", deviceId);
+ return Collections.emptyList();
+ }
+ PiPipeconf pipeconf = piPipeconfService.getPipeconf(piPipeconfService.ofDevice(deviceId).get()).get();
+
+ // Prepare PortStatistics objects to return, one per port of this device.
+ Map<Long, DefaultPortStatistics.Builder> portStatBuilders = Maps.newHashMap();
+ deviceService
+ .getPorts(deviceId)
+ .forEach(p -> portStatBuilders.put(p.number().toLong(),
+ DefaultPortStatistics.builder()
+ .setPort(p.number())
+ .setDeviceId(deviceId)));
+
+ // Generate the counter cell IDs.
+ Set<PiCounterCellId> counterCellIds = Sets.newHashSet();
+ portStatBuilders.keySet().forEach(p -> {
+ // Counter cell/index = port number.
+ counterCellIds.add(PiIndirectCounterCellId.of(INGRESS_COUNTER_ID, p));
+ counterCellIds.add(PiIndirectCounterCellId.of(EGRESS_COUNTER_ID, p));
+ });
+
+ // Query the device.
+ Collection<PiCounterCellData> counterEntryResponse;
+ try {
+ counterEntryResponse = client.readCounterCells(counterCellIds, pipeconf).get();
+ } catch (InterruptedException | ExecutionException e) {
+ log.warn("Exception while reading port counters from {}: {}", deviceId, e.toString());
+ log.debug("", e);
+ return Collections.emptyList();
+ }
+
+ // Process response.
+ counterEntryResponse.forEach(counterData -> {
+ if (counterData.cellId().type() != INDIRECT) {
+ log.warn("Invalid counter data type {}, skipping", counterData.cellId().type());
+ return;
+ }
+ PiIndirectCounterCellId indCellId = (PiIndirectCounterCellId) counterData.cellId();
+ if (!portStatBuilders.containsKey(indCellId.index())) {
+ log.warn("Unrecognized counter index {}, skipping", counterData);
+ return;
+ }
+ DefaultPortStatistics.Builder statsBuilder = portStatBuilders.get(indCellId.index());
+ if (counterData.cellId().counterId().equals(INGRESS_COUNTER_ID)) {
+ statsBuilder.setPacketsReceived(counterData.packets());
+ statsBuilder.setBytesReceived(counterData.bytes());
+ } else if (counterData.cellId().counterId().equals(EGRESS_COUNTER_ID)) {
+ statsBuilder.setPacketsSent(counterData.packets());
+ statsBuilder.setBytesSent(counterData.bytes());
+ } else {
+ log.warn("Unrecognized counter ID {}, skipping", counterData);
+ }
+ });
+
+ return portStatBuilders
+ .values()
+ .stream()
+ .map(DefaultPortStatistics.Builder::build)
+ .collect(Collectors.toList());
+ }
+}