internal/pkg/controller/addflows.go - voltha-go-controller - Gitiles

 /*
 * Copyright 2022-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 controller

 import (
 	"context"
 	"time"
 	infraerror "voltha-go-controller/internal/pkg/errorcodes"
 	infraerrorcode "voltha-go-controller/internal/pkg/errorcodes/service"

 	"voltha-go-controller/internal/pkg/of"
 	"voltha-go-controller/log"
 )

 const (
 	// MaxRetryCount - Maximum retry attempts on failure
 	MaxRetryCount int = 1
 )

 // AddFlowsTask structure
 type AddFlowsTask struct {
 	ctx       context.Context
 	flow      *of.VoltFlow
 	device    *Device
 	timestamp string
 	taskID    uint8
 }

 // NewAddFlowsTask is constructor for AddFlowsTask
 func NewAddFlowsTask(ctx context.Context, flow *of.VoltFlow, device *Device) *AddFlowsTask {
 	var aft AddFlowsTask
 	aft.device = device
 	aft.flow = flow
 	aft.ctx = ctx
 	tstamp := (time.Now()).Format(time.RFC3339Nano)
 	aft.timestamp = tstamp
 	return &aft
 }

 // Name to add flow task
 func (aft *AddFlowsTask) Name() string {
 	for _, flow := range aft.flow.SubFlows {
 		logger.Debugw(ctx, "Flow Cookies", log.Fields{"Cookie": flow.Cookie})
 	}
 	return "Add Flows Task"
 }

 // TaskID to return task ID
 func (aft *AddFlowsTask) TaskID() uint8 {
 	return aft.taskID
 }

 // Timestamp to return timestamp
 func (aft *AddFlowsTask) Timestamp() string {
 	return aft.timestamp
 }

 // Stop to stop the add flow task
 func (aft *AddFlowsTask) Stop() {
 }

 // Start to start adding flow task
 func (aft *AddFlowsTask) Start(ctx context.Context, taskID uint8) error {
 	var err error
 	aft.taskID = taskID
 	aft.ctx = ctx
 	flowsToProcess := make(map[uint64]*of.VoltSubFlow)
 	flowsPresent := 0
 	// First add/delete the flows first locally before passing them to actual device
 	for _, flow := range aft.flow.SubFlows {
 		logger.Debugw(ctx, "Flow Mod Request", log.Fields{"Cookie": flow.Cookie, "Oper": aft.flow.Command, "Port": aft.flow.PortID})
 		if aft.flow.Command == of.CommandAdd {
 			flow.State = of.FlowAddPending
 			if err = aft.device.AddFlow(ctx, flow); err != nil {
 				logger.Warnw(ctx, "Add Flow Error", log.Fields{"Cookie": flow.Cookie, "Reason": err.Error()})

 				// If flow already exists in cache, check for flow state
 				// If Success: Trigger success FLow Indication
 				// if Failure: Continue process, so add-retry happens
 				if err.Error() == ErrDuplicateFlow {
 					dbFlow, _ := aft.device.GetFlow(flow.Cookie)
 					if dbFlow.State == of.FlowAddSuccess {
 						aft.device.triggerFlowNotification(ctx, flow.Cookie, aft.flow.Command, of.BwAvailDetails{}, nil, true)
 						flowsPresent++
 						continue
 					}
 				}
 			}
 			flowsToProcess[flow.Cookie] = flow
 		} else {
 			dbFlow, ok := aft.device.GetFlow(flow.Cookie)
 			if !ok {
 				logger.Warnw(ctx, "Delete Flow Error: Flow Does not Exist", log.Fields{"Cookie": flow.Cookie, "Device": aft.device.ID})
 			} else {
 				// dbFlow.State = of.FlowDelPending
 				// aft.device.AddFlowToDb(dbFlow)
 				flowsToProcess[flow.Cookie] = dbFlow
 			}
 			aft.device.triggerFlowNotification(ctx, flow.Cookie, aft.flow.Command, of.BwAvailDetails{}, nil, false)
 		}
 	}

 	if flowsPresent == len(aft.flow.SubFlows) {
 		logger.Warn(ctx, "All Flows already present in database. Skipping Flow Push to SB")
 		return nil
 	}

 	// PortName and PortID are used for validation of PortID, whether it is still valid and associated with old PortName or
 	// PortID got assigned to another PortName. If the condition met, skip these flow update to voltha core
 	if aft.flow.PortName != "" && aft.flow.PortID != 0 {
 		portName, _ := aft.device.GetPortName(aft.flow.PortID)
 		if aft.flow.PortName != portName && portName != "" {
 			for _, flow := range aft.flow.SubFlows {
 				logger.Warnw(ctx, "Skip Flow Update", log.Fields{"Reason": "Port Deleted", "PortName": aft.flow.PortName, "PortNo": aft.flow.PortID, "Cookie": flow.Cookie, "Operation": aft.flow.Command})
 				if aft.flow.Command == of.CommandDel {
 					aft.device.triggerFlowNotification(ctx, flow.Cookie, aft.flow.Command, of.BwAvailDetails{}, nil, true)
 				}
 			}
 			return nil
 		}
 	}

 	if !aft.device.isSBOperAllowed(aft.flow.ForceAction) {
 		for _, flow := range aft.flow.SubFlows {
 			logger.Warnw(ctx, "Skipping Flow Table Update", log.Fields{"Reason": "Device State not UP", "State": aft.device.State, "Cookie": flow.Cookie, "Operation": aft.flow.Command})
 		}
 		return nil
 	}

 	flows := of.ProcessVoltFlow(aft.device.ID, aft.flow.Command, flowsToProcess)
 	for _, flow := range flows {
 		attempt := 0
 		if vc := aft.device.VolthaClient(); vc != nil {
 			for {
 				if _, err = vc.UpdateLogicalDeviceFlowTable(aft.ctx, flow); err != nil {
 					logger.Errorw(ctx, "Update Flow Table Failed", log.Fields{"Cookie": flow.GetFlowMod().Cookie, "Reason": err.Error(), "Operation": aft.flow.Command})
 					statusCode, _ := infraerror.GetErrorInfo(err)

 					// Retry on flow delete failure once.
 					// Do NOT retry incase of failure with reason: Entry Not Found
 					if aft.flow.Command == of.CommandDel && statusCode != uint32(infraerrorcode.ErrNotExists) {
 						if attempt != MaxRetryCount {
 							logger.Warnw(ctx, "Retrying Flow Delete", log.Fields{"Cookie": flow.GetFlowMod().Cookie, "Attempt": attempt})
 							attempt++
 							continue
 						}
 						logger.Errorw(ctx, "Flow Delete failed even aft max retries", log.Fields{"Flow": flow, "Attempt": attempt})
 					}
 				}
 				break
 			}
 			aft.device.triggerFlowNotification(ctx, flow.FlowMod.Cookie, aft.flow.Command, of.BwAvailDetails{}, err, true)
 		} else {
 			logger.Errorw(ctx, "Update Flow Table Failed: Voltha Client Unavailable", log.Fields{"Flow": flow})
 		}
 	}
 	return nil
 }

 func isFlowOperSuccess(statusCode uint32, oper of.Command) bool {
 	volthaErrorCode := infraerrorcode.ErrorCode(statusCode)

 	if volthaErrorCode == infraerrorcode.ErrOk {
 		return true
 	}

 	if oper == of.CommandAdd && volthaErrorCode == infraerrorcode.ErrAlreadyExists {
 		return true
 	} else if oper == of.CommandDel && volthaErrorCode == infraerrorcode.ErrNotExists {
 		return true
 	}
 	return false
 }

 // func getBwAvailInfo(bwAvailInfo []*voltha.ResponseMsg) of.BwAvailDetails {
 // 	var bwInfo of.BwAvailDetails
 // 	// convert the bw details sent from olt to a struct
 // 	// received msg format:
 // 	// additional_data[Data{ResponseMsg
 // 	//{"key":"prevBW","value":"111111"},
 // 	//{"key":"presentBW","value":"10000"}]
 // 	if len(bwAvailInfo) > 1 {
 // 		prevBwResp := bwAvailInfo[0]
 // 		if prevBwResp.Key == of.PrevBwInfo {
 // 			_, err := strconv.Atoi(prevBwResp.Val)
 // 			if err == nil {
 // 				bwInfo.PrevBw = prevBwResp.Val
 // 			}
 // 		}

 // 		presentBwResp := bwAvailInfo[1]
 // 		if presentBwResp.Key == of.PresentBwInfo {
 // 			_, err := strconv.Atoi(prevBwResp.Val)
 // 			if err == nil {
 // 				bwInfo.PresentBw = presentBwResp.Val
 // 			}
 // 		}
 // 		if bwInfo.PresentBw == bwInfo.PrevBw {
 // 			return of.BwAvailDetails{}
 // 		}
 // 		logger.Infow(ctx, "Bandwidth-consumed-info", log.Fields{"BwConsumed": bwInfo})
 // 	}
 // 	return bwInfo
 // }
	/*
	* Copyright 2022-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 controller

	import (
	"context"
	"time"
	infraerror "voltha-go-controller/internal/pkg/errorcodes"
	infraerrorcode "voltha-go-controller/internal/pkg/errorcodes/service"

	"voltha-go-controller/internal/pkg/of"
	"voltha-go-controller/log"
	)

	const (
	// MaxRetryCount - Maximum retry attempts on failure
	MaxRetryCount int = 1
	)

	// AddFlowsTask structure
	type AddFlowsTask struct {
	ctx context.Context
	flow *of.VoltFlow
	device *Device
	timestamp string
	taskID uint8
	}

	// NewAddFlowsTask is constructor for AddFlowsTask
	func NewAddFlowsTask(ctx context.Context, flow of.VoltFlow, device Device) *AddFlowsTask {
	var aft AddFlowsTask
	aft.device = device
	aft.flow = flow
	aft.ctx = ctx
	tstamp := (time.Now()).Format(time.RFC3339Nano)
	aft.timestamp = tstamp
	return &aft
	}

	// Name to add flow task
	func (aft *AddFlowsTask) Name() string {
	for _, flow := range aft.flow.SubFlows {
	logger.Debugw(ctx, "Flow Cookies", log.Fields{"Cookie": flow.Cookie})
	}
	return "Add Flows Task"
	}

	// TaskID to return task ID
	func (aft *AddFlowsTask) TaskID() uint8 {
	return aft.taskID
	}

	// Timestamp to return timestamp
	func (aft *AddFlowsTask) Timestamp() string {
	return aft.timestamp
	}

	// Stop to stop the add flow task
	func (aft *AddFlowsTask) Stop() {
	}

	// Start to start adding flow task
	func (aft *AddFlowsTask) Start(ctx context.Context, taskID uint8) error {
	var err error
	aft.taskID = taskID
	aft.ctx = ctx
	flowsToProcess := make(map[uint64]*of.VoltSubFlow)
	flowsPresent := 0
	// First add/delete the flows first locally before passing them to actual device
	for _, flow := range aft.flow.SubFlows {
	logger.Debugw(ctx, "Flow Mod Request", log.Fields{"Cookie": flow.Cookie, "Oper": aft.flow.Command, "Port": aft.flow.PortID})
	if aft.flow.Command == of.CommandAdd {
	flow.State = of.FlowAddPending
	if err = aft.device.AddFlow(ctx, flow); err != nil {
	logger.Warnw(ctx, "Add Flow Error", log.Fields{"Cookie": flow.Cookie, "Reason": err.Error()})

	// If flow already exists in cache, check for flow state
	// If Success: Trigger success FLow Indication
	// if Failure: Continue process, so add-retry happens
	if err.Error() == ErrDuplicateFlow {
	dbFlow, _ := aft.device.GetFlow(flow.Cookie)
	if dbFlow.State == of.FlowAddSuccess {
	aft.device.triggerFlowNotification(ctx, flow.Cookie, aft.flow.Command, of.BwAvailDetails{}, nil, true)
	flowsPresent++
	continue
	}
	}
	}
	flowsToProcess[flow.Cookie] = flow
	} else {
	dbFlow, ok := aft.device.GetFlow(flow.Cookie)
	if !ok {
	logger.Warnw(ctx, "Delete Flow Error: Flow Does not Exist", log.Fields{"Cookie": flow.Cookie, "Device": aft.device.ID})
	} else {
	// dbFlow.State = of.FlowDelPending
	// aft.device.AddFlowToDb(dbFlow)
	flowsToProcess[flow.Cookie] = dbFlow
	}
	aft.device.triggerFlowNotification(ctx, flow.Cookie, aft.flow.Command, of.BwAvailDetails{}, nil, false)
	}
	}

	if flowsPresent == len(aft.flow.SubFlows) {
	logger.Warn(ctx, "All Flows already present in database. Skipping Flow Push to SB")
	return nil
	}

	// PortName and PortID are used for validation of PortID, whether it is still valid and associated with old PortName or
	// PortID got assigned to another PortName. If the condition met, skip these flow update to voltha core
	if aft.flow.PortName != "" && aft.flow.PortID != 0 {
	portName, _ := aft.device.GetPortName(aft.flow.PortID)
	if aft.flow.PortName != portName && portName != "" {
	for _, flow := range aft.flow.SubFlows {
	logger.Warnw(ctx, "Skip Flow Update", log.Fields{"Reason": "Port Deleted", "PortName": aft.flow.PortName, "PortNo": aft.flow.PortID, "Cookie": flow.Cookie, "Operation": aft.flow.Command})
	if aft.flow.Command == of.CommandDel {
	aft.device.triggerFlowNotification(ctx, flow.Cookie, aft.flow.Command, of.BwAvailDetails{}, nil, true)
	}
	}
	return nil
	}
	}

	if !aft.device.isSBOperAllowed(aft.flow.ForceAction) {
	for _, flow := range aft.flow.SubFlows {
	logger.Warnw(ctx, "Skipping Flow Table Update", log.Fields{"Reason": "Device State not UP", "State": aft.device.State, "Cookie": flow.Cookie, "Operation": aft.flow.Command})
	}
	return nil
	}

	flows := of.ProcessVoltFlow(aft.device.ID, aft.flow.Command, flowsToProcess)
	for _, flow := range flows {
	attempt := 0
	if vc := aft.device.VolthaClient(); vc != nil {
	for {
	if _, err = vc.UpdateLogicalDeviceFlowTable(aft.ctx, flow); err != nil {
	logger.Errorw(ctx, "Update Flow Table Failed", log.Fields{"Cookie": flow.GetFlowMod().Cookie, "Reason": err.Error(), "Operation": aft.flow.Command})
	statusCode, _ := infraerror.GetErrorInfo(err)

	// Retry on flow delete failure once.
	// Do NOT retry incase of failure with reason: Entry Not Found
	if aft.flow.Command == of.CommandDel && statusCode != uint32(infraerrorcode.ErrNotExists) {
	if attempt != MaxRetryCount {
	logger.Warnw(ctx, "Retrying Flow Delete", log.Fields{"Cookie": flow.GetFlowMod().Cookie, "Attempt": attempt})
	attempt++
	continue
	}
	logger.Errorw(ctx, "Flow Delete failed even aft max retries", log.Fields{"Flow": flow, "Attempt": attempt})
	}
	}
	break
	}
	aft.device.triggerFlowNotification(ctx, flow.FlowMod.Cookie, aft.flow.Command, of.BwAvailDetails{}, err, true)
	} else {
	logger.Errorw(ctx, "Update Flow Table Failed: Voltha Client Unavailable", log.Fields{"Flow": flow})
	}
	}
	return nil
	}

	func isFlowOperSuccess(statusCode uint32, oper of.Command) bool {
	volthaErrorCode := infraerrorcode.ErrorCode(statusCode)

	if volthaErrorCode == infraerrorcode.ErrOk {
	return true
	}

	if oper == of.CommandAdd && volthaErrorCode == infraerrorcode.ErrAlreadyExists {
	return true
	} else if oper == of.CommandDel && volthaErrorCode == infraerrorcode.ErrNotExists {
	return true
	}
	return false
	}

	// func getBwAvailInfo(bwAvailInfo []*voltha.ResponseMsg) of.BwAvailDetails {
	// var bwInfo of.BwAvailDetails
	// // convert the bw details sent from olt to a struct
	// // received msg format:
	// // additional_data[Data{ResponseMsg
	// //{"key":"prevBW","value":"111111"},
	// //{"key":"presentBW","value":"10000"}]
	// if len(bwAvailInfo) > 1 {
	// prevBwResp := bwAvailInfo[0]
	// if prevBwResp.Key == of.PrevBwInfo {
	// _, err := strconv.Atoi(prevBwResp.Val)
	// if err == nil {
	// bwInfo.PrevBw = prevBwResp.Val
	// }
	// }

	// presentBwResp := bwAvailInfo[1]
	// if presentBwResp.Key == of.PresentBwInfo {
	// _, err := strconv.Atoi(prevBwResp.Val)
	// if err == nil {
	// bwInfo.PresentBw = presentBwResp.Val
	// }
	// }
	// if bwInfo.PresentBw == bwInfo.PrevBw {
	// return of.BwAvailDetails{}
	// }
	// logger.Infow(ctx, "Bandwidth-consumed-info", log.Fields{"BwConsumed": bwInfo})
	// }
	// return bwInfo
	// }