Carmelo Cascone | 59f57de | 2017-07-11 19:55:09 -0400 | [diff] [blame] | 1 | /* |
| 2 | * Copyright 2017-present Open Networking Laboratory |
| 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 | |
| 17 | package org.onosproject.drivers.bmv2; |
| 18 | |
| 19 | import com.google.common.collect.ImmutableBiMap; |
| 20 | import org.onlab.util.ImmutableByteSequence; |
| 21 | import org.onosproject.net.PortNumber; |
| 22 | import org.onosproject.net.driver.AbstractHandlerBehaviour; |
| 23 | import org.onosproject.net.flow.TrafficTreatment; |
| 24 | import org.onosproject.net.flow.criteria.Criterion; |
| 25 | import org.onosproject.net.flow.instructions.Instruction; |
| 26 | import org.onosproject.net.flow.instructions.Instructions; |
| 27 | import org.onosproject.net.pi.model.PiPipeconf; |
| 28 | import org.onosproject.net.pi.model.PiPipelineInterpreter; |
| 29 | import org.onosproject.net.pi.runtime.PiAction; |
| 30 | import org.onosproject.net.pi.runtime.PiActionId; |
| 31 | import org.onosproject.net.pi.runtime.PiActionParam; |
| 32 | import org.onosproject.net.pi.runtime.PiActionParamId; |
| 33 | import org.onosproject.net.pi.runtime.PiHeaderFieldId; |
| 34 | import org.onosproject.net.pi.runtime.PiTableAction; |
| 35 | import org.onosproject.net.pi.runtime.PiTableId; |
| 36 | |
| 37 | import java.util.Optional; |
| 38 | |
| 39 | import static org.onosproject.net.PortNumber.CONTROLLER; |
| 40 | |
| 41 | /** |
| 42 | * Interpreter implementation for the default pipeconf. |
| 43 | */ |
| 44 | public class Bmv2DefaultInterpreter extends AbstractHandlerBehaviour implements PiPipelineInterpreter { |
| 45 | private static final String TABLE0 = "table0"; |
| 46 | private static final String SEND_TO_CPU = "send_to_cpu_0"; |
| 47 | private static final String PORT = "port"; |
| 48 | private static final String DROP = "_drop_0"; |
| 49 | private static final String SET_EGRESS_PORT = "set_egress_port_0"; |
| 50 | |
| 51 | private static final PiHeaderFieldId IN_PORT_ID = PiHeaderFieldId.of("standard_metadata", "ingress_port"); |
| 52 | private static final PiHeaderFieldId ETH_DST_ID = PiHeaderFieldId.of("ethernet_t", "dstAddr"); |
| 53 | private static final PiHeaderFieldId ETH_SRC_ID = PiHeaderFieldId.of("ethernet_t", "srcAddr"); |
| 54 | private static final PiHeaderFieldId ETH_TYPE_ID = PiHeaderFieldId.of("ethernet_t", "etherType"); |
| 55 | |
| 56 | private static final ImmutableBiMap<Criterion.Type, PiHeaderFieldId> CRITERION_MAP = ImmutableBiMap.of( |
| 57 | Criterion.Type.IN_PORT, IN_PORT_ID, |
| 58 | Criterion.Type.ETH_DST, ETH_DST_ID, |
| 59 | Criterion.Type.ETH_SRC, ETH_SRC_ID, |
| 60 | Criterion.Type.ETH_TYPE, ETH_TYPE_ID); |
| 61 | |
| 62 | private static final ImmutableBiMap<Integer, PiTableId> TABLE_MAP = ImmutableBiMap.of( |
| 63 | 0, PiTableId.of(TABLE0)); |
| 64 | |
| 65 | @Override |
| 66 | public PiTableAction mapTreatment(TrafficTreatment treatment, PiPipeconf pipeconf) throws PiInterpreterException { |
| 67 | |
| 68 | if (treatment.allInstructions().size() == 0) { |
| 69 | // No instructions means drop for us. |
| 70 | return actionWithName(DROP); |
| 71 | } else if (treatment.allInstructions().size() > 1) { |
| 72 | // Otherwise, we understand treatments with only 1 instruction. |
| 73 | throw new PiPipelineInterpreter.PiInterpreterException("Treatment has multiple instructions"); |
| 74 | } |
| 75 | |
| 76 | Instruction instruction = treatment.allInstructions().get(0); |
| 77 | |
| 78 | switch (instruction.type()) { |
| 79 | case OUTPUT: |
| 80 | Instructions.OutputInstruction outInstruction = (Instructions.OutputInstruction) instruction; |
| 81 | PortNumber port = outInstruction.port(); |
| 82 | if (!port.isLogical()) { |
| 83 | PiAction.builder() |
| 84 | .withId(PiActionId.of(SET_EGRESS_PORT)) |
| 85 | .withParameter(new PiActionParam(PiActionParamId.of(PORT), |
| 86 | ImmutableByteSequence.copyFrom(port.toLong()))) |
| 87 | .build(); |
| 88 | } else if (port.equals(CONTROLLER)) { |
| 89 | return actionWithName(SEND_TO_CPU); |
| 90 | } else { |
| 91 | throw new PiInterpreterException("Egress on logical port not supported: " + port); |
| 92 | } |
| 93 | case NOACTION: |
| 94 | return actionWithName(DROP); |
| 95 | default: |
| 96 | throw new PiInterpreterException("Instruction type not supported: " + instruction.type().name()); |
| 97 | } |
| 98 | } |
| 99 | |
| 100 | /** |
| 101 | * Returns an action instance with no runtime parameters. |
| 102 | */ |
| 103 | private PiAction actionWithName(String name) { |
| 104 | return PiAction.builder().withId(PiActionId.of(name)).build(); |
| 105 | } |
| 106 | |
| 107 | @Override |
| 108 | public Optional<PiHeaderFieldId> mapCriterionType(Criterion.Type type) { |
| 109 | return Optional.ofNullable(CRITERION_MAP.get(type)); |
| 110 | } |
| 111 | |
| 112 | @Override |
| 113 | public Optional<Criterion.Type> mapPiHeaderFieldId(PiHeaderFieldId headerFieldId) { |
| 114 | return Optional.ofNullable(CRITERION_MAP.inverse().get(headerFieldId)); |
| 115 | } |
| 116 | |
| 117 | @Override |
| 118 | public Optional<PiTableId> mapFlowRuleTableId(int flowRuleTableId) { |
| 119 | return Optional.ofNullable(TABLE_MAP.get(flowRuleTableId)); |
| 120 | } |
| 121 | } |