Kent Hagerman | 3136fbd | 2020-05-14 10:30:45 -0400 | [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 | |
| 17 | package device |
| 18 | |
| 19 | import ( |
| 20 | "context" |
| 21 | "fmt" |
| 22 | "strconv" |
| 23 | |
| 24 | fu "github.com/opencord/voltha-lib-go/v3/pkg/flows" |
| 25 | "github.com/opencord/voltha-lib-go/v3/pkg/log" |
| 26 | ofp "github.com/opencord/voltha-protos/v3/go/openflow_13" |
| 27 | "google.golang.org/grpc/codes" |
| 28 | "google.golang.org/grpc/status" |
| 29 | ) |
| 30 | |
| 31 | // updateMeterTable updates the meter table of that logical device |
| 32 | func (agent *LogicalAgent) updateMeterTable(ctx context.Context, meterMod *ofp.OfpMeterMod) error { |
| 33 | logger.Debug("updateMeterTable") |
| 34 | if meterMod == nil { |
| 35 | return nil |
| 36 | } |
| 37 | switch meterMod.GetCommand() { |
| 38 | case ofp.OfpMeterModCommand_OFPMC_ADD: |
| 39 | return agent.meterAdd(ctx, meterMod) |
| 40 | case ofp.OfpMeterModCommand_OFPMC_DELETE: |
| 41 | return agent.meterDelete(ctx, meterMod) |
| 42 | case ofp.OfpMeterModCommand_OFPMC_MODIFY: |
| 43 | return agent.meterModify(ctx, meterMod) |
| 44 | } |
| 45 | return status.Errorf(codes.Internal, |
| 46 | "unhandled-command: lDeviceId:%s, command:%s", agent.logicalDeviceID, meterMod.GetCommand()) |
| 47 | } |
| 48 | |
| 49 | func (agent *LogicalAgent) meterAdd(ctx context.Context, meterMod *ofp.OfpMeterMod) error { |
| 50 | logger.Debugw("meterAdd", log.Fields{"metermod": *meterMod}) |
| 51 | if meterMod == nil { |
| 52 | return nil |
| 53 | } |
| 54 | |
| 55 | meterEntry := fu.MeterEntryFromMeterMod(meterMod) |
| 56 | agent.meterLock.Lock() |
| 57 | //check if the meter already exists or not |
| 58 | _, ok := agent.meters[meterMod.MeterId] |
| 59 | if ok { |
| 60 | logger.Infow("Meter-already-exists", log.Fields{"meter": *meterMod}) |
| 61 | agent.meterLock.Unlock() |
| 62 | return nil |
| 63 | } |
| 64 | |
| 65 | mChunk := MeterChunk{ |
| 66 | meter: meterEntry, |
| 67 | } |
| 68 | //Add to map and acquire the per meter lock |
| 69 | agent.meters[meterMod.MeterId] = &mChunk |
| 70 | mChunk.lock.Lock() |
| 71 | defer mChunk.lock.Unlock() |
| 72 | agent.meterLock.Unlock() |
| 73 | meterID := strconv.Itoa(int(meterMod.MeterId)) |
| 74 | if err := agent.clusterDataProxy.AddWithID(ctx, "meters/"+agent.logicalDeviceID, meterID, meterEntry); err != nil { |
| 75 | logger.Errorw("failed-adding-meter", log.Fields{"deviceID": agent.logicalDeviceID, "meterID": meterID, "err": err}) |
| 76 | //Revert the map |
| 77 | agent.meterLock.Lock() |
| 78 | delete(agent.meters, meterMod.MeterId) |
| 79 | agent.meterLock.Unlock() |
| 80 | return err |
| 81 | } |
| 82 | |
| 83 | logger.Debugw("Meter-added-successfully", log.Fields{"Added-meter": meterEntry}) |
| 84 | return nil |
| 85 | } |
| 86 | |
| 87 | func (agent *LogicalAgent) meterDelete(ctx context.Context, meterMod *ofp.OfpMeterMod) error { |
| 88 | logger.Debug("meterDelete", log.Fields{"meterMod": *meterMod}) |
| 89 | if meterMod == nil { |
| 90 | return nil |
| 91 | } |
| 92 | agent.meterLock.RLock() |
| 93 | meterChunk, ok := agent.meters[meterMod.MeterId] |
| 94 | agent.meterLock.RUnlock() |
| 95 | if ok { |
| 96 | //Dont let anyone to do any changes to this meter until this is done. |
| 97 | //And wait if someone else is already making modifications. Do this with per meter lock. |
| 98 | meterChunk.lock.Lock() |
| 99 | defer meterChunk.lock.Unlock() |
| 100 | if err := agent.deleteFlowsOfMeter(ctx, meterMod.MeterId); err != nil { |
| 101 | return err |
| 102 | } |
| 103 | //remove from the store and cache |
| 104 | if err := agent.removeLogicalDeviceMeter(ctx, meterMod.MeterId); err != nil { |
| 105 | return err |
| 106 | } |
| 107 | logger.Debugw("meterDelete-success", log.Fields{"meterID": meterMod.MeterId}) |
| 108 | } else { |
| 109 | logger.Warnw("meter-not-found", log.Fields{"meterID": meterMod.MeterId}) |
| 110 | } |
| 111 | return nil |
| 112 | } |
| 113 | |
| 114 | func (agent *LogicalAgent) meterModify(ctx context.Context, meterMod *ofp.OfpMeterMod) error { |
| 115 | logger.Debug("meterModify") |
| 116 | if meterMod == nil { |
| 117 | return nil |
| 118 | } |
| 119 | newMeter := fu.MeterEntryFromMeterMod(meterMod) |
| 120 | agent.meterLock.RLock() |
| 121 | meterChunk, ok := agent.meters[newMeter.Config.MeterId] |
| 122 | agent.meterLock.RUnlock() |
| 123 | if !ok { |
| 124 | return fmt.Errorf("no-meter-to-modify:%d", newMeter.Config.MeterId) |
| 125 | } |
| 126 | //Release the map lock and syncronize per meter |
| 127 | meterChunk.lock.Lock() |
| 128 | defer meterChunk.lock.Unlock() |
| 129 | oldMeter := meterChunk.meter |
| 130 | newMeter.Stats.FlowCount = oldMeter.Stats.FlowCount |
| 131 | |
| 132 | if err := agent.updateLogicalDeviceMeter(ctx, newMeter, meterChunk); err != nil { |
| 133 | logger.Errorw("db-meter-update-failed", log.Fields{"logicalDeviceId": agent.logicalDeviceID, "meterID": newMeter.Config.MeterId}) |
| 134 | return err |
| 135 | } |
| 136 | logger.Debugw("replaced-with-new-meter", log.Fields{"oldMeter": oldMeter, "newMeter": newMeter}) |
| 137 | return nil |
| 138 | } |