Carmelo Cascone | 17fc9e4 | 2016-05-31 11:29:21 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright 2016-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.bmv2.api.runtime; |
| 18 | |
Carmelo Cascone | 9e39e31 | 2016-06-16 14:47:09 -0700 | [diff] [blame] | 19 | import com.google.common.annotations.Beta; |
Carmelo Cascone | 17fc9e4 | 2016-05-31 11:29:21 -0700 | [diff] [blame] | 20 | import com.google.common.base.MoreObjects; |
| 21 | import com.google.common.base.Objects; |
Carmelo Cascone | 0ec92f1 | 2016-06-17 14:41:40 -0700 | [diff] [blame^] | 22 | import com.google.common.collect.Maps; |
| 23 | import org.onlab.util.ImmutableByteSequence; |
Carmelo Cascone | 17fc9e4 | 2016-05-31 11:29:21 -0700 | [diff] [blame] | 24 | import org.onlab.util.KryoNamespace; |
Carmelo Cascone | 0ec92f1 | 2016-06-17 14:41:40 -0700 | [diff] [blame^] | 25 | import org.onosproject.bmv2.api.context.Bmv2ActionModel; |
| 26 | import org.onosproject.bmv2.api.context.Bmv2Configuration; |
| 27 | import org.onosproject.bmv2.api.context.Bmv2RuntimeDataModel; |
| 28 | import org.onosproject.bmv2.api.utils.Bmv2TranslatorUtils; |
Carmelo Cascone | 17fc9e4 | 2016-05-31 11:29:21 -0700 | [diff] [blame] | 29 | import org.onosproject.net.flow.AbstractExtension; |
| 30 | import org.onosproject.net.flow.instructions.ExtensionTreatment; |
| 31 | import org.onosproject.net.flow.instructions.ExtensionTreatmentType; |
| 32 | |
Carmelo Cascone | 0ec92f1 | 2016-06-17 14:41:40 -0700 | [diff] [blame^] | 33 | import java.nio.ByteBuffer; |
| 34 | import java.util.ArrayList; |
| 35 | import java.util.List; |
| 36 | import java.util.Map; |
| 37 | |
| 38 | import static com.google.common.base.Preconditions.checkArgument; |
| 39 | import static com.google.common.base.Preconditions.checkNotNull; |
| 40 | import static org.onlab.util.ImmutableByteSequence.copyFrom; |
| 41 | import static org.onosproject.bmv2.api.utils.Bmv2TranslatorUtils.fitByteSequence; |
Carmelo Cascone | 17fc9e4 | 2016-05-31 11:29:21 -0700 | [diff] [blame] | 42 | import static org.onosproject.net.flow.instructions.ExtensionTreatmentType.ExtensionTreatmentTypes.BMV2_ACTION; |
| 43 | |
| 44 | /** |
| 45 | * Extension treatment for BMv2 used as a wrapper for a {@link Bmv2Action}. |
| 46 | */ |
Carmelo Cascone | 9e39e31 | 2016-06-16 14:47:09 -0700 | [diff] [blame] | 47 | @Beta |
Carmelo Cascone | 17fc9e4 | 2016-05-31 11:29:21 -0700 | [diff] [blame] | 48 | public final class Bmv2ExtensionTreatment extends AbstractExtension implements ExtensionTreatment { |
| 49 | |
| 50 | private final KryoNamespace appKryo = new KryoNamespace.Builder().build(); |
| 51 | private Bmv2Action action; |
| 52 | |
Carmelo Cascone | 9e39e31 | 2016-06-16 14:47:09 -0700 | [diff] [blame] | 53 | /** |
| 54 | * Creates a new extension treatment for the given BMv2 action. |
| 55 | * |
| 56 | * @param action an action |
| 57 | */ |
Carmelo Cascone | 0ec92f1 | 2016-06-17 14:41:40 -0700 | [diff] [blame^] | 58 | private Bmv2ExtensionTreatment(Bmv2Action action) { |
Carmelo Cascone | 17fc9e4 | 2016-05-31 11:29:21 -0700 | [diff] [blame] | 59 | this.action = action; |
| 60 | } |
| 61 | |
Carmelo Cascone | 9e39e31 | 2016-06-16 14:47:09 -0700 | [diff] [blame] | 62 | /** |
| 63 | * Returns the action contained by this extension selector. |
| 64 | * |
| 65 | * @return an action |
| 66 | */ |
| 67 | public Bmv2Action action() { |
Carmelo Cascone | 17fc9e4 | 2016-05-31 11:29:21 -0700 | [diff] [blame] | 68 | return action; |
| 69 | } |
| 70 | |
| 71 | @Override |
| 72 | public ExtensionTreatmentType type() { |
| 73 | return BMV2_ACTION.type(); |
| 74 | } |
| 75 | |
| 76 | @Override |
| 77 | public byte[] serialize() { |
| 78 | return appKryo.serialize(action); |
| 79 | } |
| 80 | |
| 81 | @Override |
| 82 | public void deserialize(byte[] data) { |
| 83 | action = appKryo.deserialize(data); |
| 84 | } |
| 85 | |
| 86 | @Override |
| 87 | public int hashCode() { |
| 88 | return Objects.hashCode(action); |
| 89 | } |
| 90 | |
| 91 | @Override |
| 92 | public boolean equals(Object obj) { |
| 93 | if (this == obj) { |
| 94 | return true; |
| 95 | } |
| 96 | if (obj == null || getClass() != obj.getClass()) { |
| 97 | return false; |
| 98 | } |
| 99 | final Bmv2ExtensionTreatment other = (Bmv2ExtensionTreatment) obj; |
| 100 | return Objects.equal(this.action, other.action); |
| 101 | } |
| 102 | |
| 103 | @Override |
| 104 | public String toString() { |
| 105 | return MoreObjects.toStringHelper(this) |
| 106 | .add("action", action) |
| 107 | .toString(); |
| 108 | } |
Carmelo Cascone | 0ec92f1 | 2016-06-17 14:41:40 -0700 | [diff] [blame^] | 109 | |
| 110 | /** |
| 111 | * Returns a new, empty BMv2 extension treatment. |
| 112 | * |
| 113 | * @return a BMv2 extension treatment |
| 114 | */ |
| 115 | public static Bmv2ExtensionTreatment empty() { |
| 116 | return new Bmv2ExtensionTreatment(null); |
| 117 | } |
| 118 | |
| 119 | /** |
| 120 | * Returns a new BMv2 extension treatment builder. |
| 121 | * |
| 122 | * @return a builder |
| 123 | */ |
| 124 | public static Builder builder() { |
| 125 | return new Builder(); |
| 126 | } |
| 127 | |
| 128 | /** |
| 129 | * A builder of BMv2 extension treatments. |
| 130 | * |
| 131 | * BMv2 action parameters are built from primitive data types ({@code short}, {@code int}, {@code long} or |
| 132 | * {@code byte[]}) and automatically casted to fixed-length byte sequences according to the given BMv2 |
| 133 | * configuration. |
| 134 | */ |
| 135 | public static final class Builder { |
| 136 | private Bmv2Configuration configuration; |
| 137 | private String actionName; |
| 138 | private final Map<String, ImmutableByteSequence> parameters = Maps.newHashMap(); |
| 139 | |
| 140 | private Builder() { |
| 141 | // Ban constructor. |
| 142 | } |
| 143 | |
| 144 | /** |
| 145 | * Sets the BMv2 configuration to format the action parameters. |
| 146 | * |
| 147 | * @param config a BMv2 configuration |
| 148 | * @return this |
| 149 | */ |
| 150 | public Builder forConfiguration(Bmv2Configuration config) { |
| 151 | this.configuration = config; |
| 152 | return this; |
| 153 | } |
| 154 | |
| 155 | /** |
| 156 | * Sets the action name. |
| 157 | * |
| 158 | * @param actionName a string value |
| 159 | * @return this |
| 160 | */ |
| 161 | public Builder setActionName(String actionName) { |
| 162 | this.actionName = actionName; |
| 163 | return this; |
| 164 | } |
| 165 | |
| 166 | /** |
| 167 | * Adds an action parameter. |
| 168 | * |
| 169 | * @param parameterName a string value |
| 170 | * @param value a short value |
| 171 | * @return this |
| 172 | */ |
| 173 | public Builder addParameter(String parameterName, short value) { |
| 174 | this.parameters.put(parameterName, copyFrom(bb(value))); |
| 175 | return this; |
| 176 | } |
| 177 | |
| 178 | /** |
| 179 | * Adds an action parameter. |
| 180 | * |
| 181 | * @param parameterName a string value |
| 182 | * @param value an integer value |
| 183 | * @return this |
| 184 | */ |
| 185 | public Builder addParameter(String parameterName, int value) { |
| 186 | this.parameters.put(parameterName, copyFrom(bb(value))); |
| 187 | return this; |
| 188 | } |
| 189 | |
| 190 | /** |
| 191 | * Adds an action parameter. |
| 192 | * |
| 193 | * @param parameterName a string value |
| 194 | * @param value a long value |
| 195 | * @return this |
| 196 | */ |
| 197 | public Builder addParameter(String parameterName, long value) { |
| 198 | this.parameters.put(parameterName, copyFrom(bb(value))); |
| 199 | return this; |
| 200 | } |
| 201 | |
| 202 | /** |
| 203 | * Adds an action parameter. |
| 204 | * |
| 205 | * @param parameterName a string value |
| 206 | * @param value a byte array |
| 207 | * @return this |
| 208 | */ |
| 209 | public Builder addParameter(String parameterName, byte[] value) { |
| 210 | this.parameters.put(parameterName, copyFrom(bb(value))); |
| 211 | return this; |
| 212 | } |
| 213 | |
| 214 | /** |
| 215 | * Returns a new BMv2 extension treatment. |
| 216 | * |
| 217 | * @return a BMv2 extension treatment |
| 218 | * @throws NullPointerException if the given action or parameter names are not defined in the given |
| 219 | * configuration |
| 220 | * @throws IllegalArgumentException if a given parameter cannot be casted for the given configuration, e.g. |
| 221 | * when trying to fit an integer value into a smaller, fixed-length parameter |
| 222 | * produces overflow. |
| 223 | */ |
| 224 | public Bmv2ExtensionTreatment build() { |
| 225 | checkNotNull(configuration, "configuration cannot be null"); |
| 226 | checkNotNull(actionName, "action name cannot be null"); |
| 227 | |
| 228 | Bmv2ActionModel actionModel = configuration.action(actionName); |
| 229 | |
| 230 | checkNotNull(actionModel, "no such an action in configuration", actionName); |
| 231 | checkArgument(actionModel.runtimeDatas().size() == parameters.size(), |
| 232 | "invalid number of parameters", actionName); |
| 233 | |
| 234 | List<ImmutableByteSequence> newParameters = new ArrayList<>(parameters.size()); |
| 235 | |
| 236 | for (String parameterName : parameters.keySet()) { |
| 237 | Bmv2RuntimeDataModel runtimeData = actionModel.runtimeData(parameterName); |
| 238 | checkNotNull(runtimeData, "no such an action parameter in configuration", |
| 239 | actionName + "->" + runtimeData.name()); |
| 240 | int bitWidth = runtimeData.bitWidth(); |
| 241 | try { |
| 242 | ImmutableByteSequence newSequence = fitByteSequence(parameters.get(parameterName), bitWidth); |
| 243 | int idx = actionModel.runtimeDatas().indexOf(runtimeData); |
| 244 | newParameters.add(idx, newSequence); |
| 245 | } catch (Bmv2TranslatorUtils.ByteSequenceFitException e) { |
| 246 | throw new IllegalArgumentException(e.getMessage() + |
| 247 | " [" + actionName + "->" + runtimeData.name() + "]"); |
| 248 | } |
| 249 | } |
| 250 | |
| 251 | return new Bmv2ExtensionTreatment(new Bmv2Action(actionName, newParameters)); |
| 252 | } |
| 253 | |
| 254 | |
| 255 | |
| 256 | private static ByteBuffer bb(Object value) { |
| 257 | if (value instanceof Short) { |
| 258 | return ByteBuffer.allocate(Short.BYTES).putShort((short) value); |
| 259 | } else if (value instanceof Integer) { |
| 260 | return ByteBuffer.allocate(Integer.BYTES).putInt((int) value); |
| 261 | } else if (value instanceof Long) { |
| 262 | return ByteBuffer.allocate(Long.BYTES).putLong((long) value); |
| 263 | } else if (value instanceof byte[]) { |
| 264 | byte[] bytes = (byte[]) value; |
| 265 | return ByteBuffer.allocate(bytes.length).put(bytes); |
| 266 | } else { |
| 267 | // Never here. |
| 268 | return null; |
| 269 | } |
| 270 | } |
| 271 | } |
Carmelo Cascone | 17fc9e4 | 2016-05-31 11:29:21 -0700 | [diff] [blame] | 272 | } |