hjtsao | 1e8a1bd | 2018-10-22 11:02:00 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright 2018-present Open Networking Foundation |
| 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | */ |
| 16 | package org.onosproject.drivers.p4runtime; |
| 17 | |
| 18 | import org.onosproject.net.DeviceId; |
| 19 | import org.onosproject.net.behaviour.TableStatisticsDiscovery; |
| 20 | import org.onosproject.net.flow.FlowRuleService; |
| 21 | import org.onosproject.net.flow.FlowEntry; |
| 22 | import org.onosproject.net.flow.TableId; |
| 23 | import org.onosproject.net.flow.IndexTableId; |
| 24 | import org.onosproject.net.flow.TableStatisticsEntry; |
| 25 | import org.onosproject.net.flow.DefaultTableStatisticsEntry; |
| 26 | import org.onosproject.net.pi.model.PiPipelineModel; |
| 27 | import org.onosproject.net.pi.model.PiPipelineInterpreter; |
| 28 | import org.onosproject.net.pi.model.PiTableId; |
| 29 | import org.onosproject.net.pi.model.PiTableModel; |
| 30 | |
| 31 | import java.util.List; |
| 32 | import java.util.Collections; |
| 33 | import java.util.Map; |
| 34 | import java.util.HashMap; |
| 35 | import java.util.Iterator; |
| 36 | import java.util.ArrayList; |
| 37 | |
| 38 | import static com.google.common.collect.Lists.newArrayList; |
| 39 | |
| 40 | /** |
| 41 | * Implementation of behaviour TableStatisticsDiscovery for P4Runtime. |
| 42 | */ |
| 43 | public class P4RuntimeTableStatisticsDiscovery extends AbstractP4RuntimeHandlerBehaviour |
| 44 | implements TableStatisticsDiscovery { |
| 45 | |
| 46 | @Override |
| 47 | public List<TableStatisticsEntry> getTableStatistics() { |
| 48 | if (!setupBehaviour()) { |
| 49 | return Collections.emptyList(); |
| 50 | } |
| 51 | FlowRuleService flowService = handler().get(FlowRuleService.class); |
| 52 | PiPipelineInterpreter interpreter = getInterpreter(); |
| 53 | PiPipelineModel model = pipeconf.pipelineModel(); |
| 54 | List<TableStatisticsEntry> tableStatsList; |
| 55 | |
| 56 | List<FlowEntry> rules = newArrayList(flowService.getFlowEntries(deviceId)); |
| 57 | Map<PiTableId, Integer> piTableFlowCount = piFlowRuleCounting(model, interpreter, rules); |
| 58 | Map<PiTableId, Long> piTableMatchCount = piMatchedCounting(model, interpreter, rules); |
| 59 | tableStatsList = generatePiFlowTableStatistics(piTableFlowCount, piTableMatchCount, model, deviceId); |
| 60 | |
| 61 | return tableStatsList; |
| 62 | } |
| 63 | |
| 64 | /** |
| 65 | * Returns the number of added flows in each table. |
| 66 | * |
| 67 | * @param model pipeline model |
| 68 | * @param interpreter pipeline interpreter |
| 69 | * @param rules flow rules in this device |
| 70 | * @return hashmap containing matched packet counting for each table |
| 71 | */ |
| 72 | private Map<PiTableId, Integer> piFlowRuleCounting(PiPipelineModel model, PiPipelineInterpreter interpreter, |
| 73 | List<FlowEntry> rules) { |
| 74 | Map<PiTableId, Integer> piTableFlowCount = new HashMap<>(); |
| 75 | for (PiTableModel tableModel : model.tables()) { |
| 76 | piTableFlowCount.put(tableModel.id(), 0); |
| 77 | } |
| 78 | for (FlowEntry f : rules) { |
| 79 | if (f.state() == FlowEntry.FlowEntryState.ADDED) { |
| 80 | PiTableId piTableId = getPiTableId(f, interpreter); |
| 81 | if (piTableId != null) { |
| 82 | piTableFlowCount.put(piTableId, piTableFlowCount.get(piTableId) + 1); |
| 83 | } |
| 84 | } |
| 85 | } |
| 86 | return piTableFlowCount; |
| 87 | } |
| 88 | |
| 89 | /** |
| 90 | * Returns the number of matched packets for each table. |
| 91 | * |
| 92 | * @param model pipeline model |
| 93 | * @param interpreter pipeline interpreter |
| 94 | * @param rules flow rules in this device |
| 95 | * @return hashmap containing flow rule counting for each table |
| 96 | */ |
| 97 | private Map<PiTableId, Long> piMatchedCounting(PiPipelineModel model, PiPipelineInterpreter interpreter, |
| 98 | List<FlowEntry> rules) { |
| 99 | Map<PiTableId, Long> piTableMatchCount = new HashMap<>(); |
| 100 | for (PiTableModel tableModel : model.tables()) { |
| 101 | piTableMatchCount.put(tableModel.id(), (long) 0); |
| 102 | } |
| 103 | for (FlowEntry f : rules) { |
| 104 | if (f.state() == FlowEntry.FlowEntryState.ADDED) { |
| 105 | PiTableId piTableId = getPiTableId(f, interpreter); |
| 106 | if (piTableId != null) { |
| 107 | piTableMatchCount.put(piTableId, piTableMatchCount.get(piTableId) + f.packets()); |
| 108 | } |
| 109 | } |
| 110 | } |
| 111 | return piTableMatchCount; |
| 112 | } |
| 113 | |
| 114 | /** |
| 115 | * Returns the PiTableId of the pipeline independent table that contains the flow rule. If null is returned, it |
| 116 | * means that the given flow rule's table ID is index table ID without a mapping with a pipeline independent table |
| 117 | * ID. |
| 118 | * |
| 119 | * @param flowEntry flow rule |
| 120 | * @param interpreter pipeline interpreter |
| 121 | * @return PiTableId of the table containing input FlowEntry or null |
| 122 | */ |
| 123 | private PiTableId getPiTableId(FlowEntry flowEntry, PiPipelineInterpreter interpreter) { |
| 124 | return flowEntry.table().type() == TableId.Type.PIPELINE_INDEPENDENT ? (PiTableId) flowEntry.table() : |
| 125 | interpreter.mapFlowRuleTableId(((IndexTableId) flowEntry.table()).id()).orElse(null); |
| 126 | } |
| 127 | |
| 128 | /** |
| 129 | * Returns the list of table statistics for P4 switch. |
| 130 | * |
| 131 | * @param piTableFlowCount hashmap containing the number of flow rules for each table |
| 132 | * @param piTableMatchCount hashmap containing the number of matched packets for each table |
| 133 | * @param model pipeline model |
| 134 | * @param deviceId device ID |
| 135 | * @return list of table statistics for P4 switch |
| 136 | */ |
| 137 | private List<TableStatisticsEntry> generatePiFlowTableStatistics(Map<PiTableId, Integer> piTableFlowCount, |
| 138 | Map<PiTableId, Long> piTableMatchCount, |
| 139 | PiPipelineModel model, DeviceId deviceId) { |
| 140 | List<TableStatisticsEntry> tableStatsList; |
| 141 | Iterator it = piTableFlowCount.entrySet().iterator(); |
| 142 | tableStatsList = new ArrayList<>(); |
| 143 | while (it.hasNext()) { |
| 144 | Map.Entry pair = (Map.Entry) it.next(); |
| 145 | TableStatisticsEntry tableStat = DefaultTableStatisticsEntry.builder() |
| 146 | .withDeviceId(deviceId) |
| 147 | .withTableId((PiTableId) pair.getKey()) |
| 148 | .withActiveFlowEntries(piTableFlowCount.get(pair.getKey())) |
| 149 | .withPacketsMatchedCount(piTableMatchCount.get(pair.getKey())) |
| 150 | .withMaxSize(model.table((PiTableId) pair.getKey()).get().maxSize()).build(); |
| 151 | tableStatsList.add(tableStat); |
| 152 | it.remove(); |
| 153 | } |
| 154 | return tableStatsList; |
| 155 | } |
| 156 | } |