internal/pkg/application/meters.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 application

 import (
 	"context"
 	"encoding/json"
 	"errors"
 	"sync"

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

 // VoltShaperConfig is shaper profile configuration structure
 type VoltShaperConfig struct {
 	Name      string
 	BurstSize uint32
 }

 // VoltBwConfig is bandwidth profile configuration structure
 type VoltBwConfig struct {
 	Name string
 	Fir  uint32
 	Air  uint32
 	Eir  uint32
 }

 // VoltBandwidthProf is bandwidth profile stored at VGC
 type VoltBandwidthProf struct {
 	VoltBwConfig
 }

 // VoltShaperProf is shaper profile stored at VGC
 type VoltShaperProf struct {
 	VoltShaperConfig
 }

 // VoltMeterProf is meter profile stored at VGC
 type VoltMeterProf struct {
 	VoltMeter
 }

 // MeterMgr structure
 type MeterMgr struct {
 	Meters      sync.Map
 	MetersByID  sync.Map
 	LastMeterID uint32
 }

 // Init to initialize MeterMgr
 func (m *MeterMgr) Init() {
 	m.LastMeterID = 0
 }

 // VoltMeter : A VOLT meter is a combination of BW and shaper profiles
 // The ID is generated by the VOLT application
 type VoltMeter struct {
 	Name               string
 	Version            string
 	ID                 uint32
 	Fir                uint32
 	Air                uint32
 	Eir                uint32
 	BurstSize          uint32
 	AssociatedServices uint32
 	Cir                uint32
 	Cbs                uint32
 	Pir                uint32
 	Pbs                uint32
 	Gir                uint32
 	Ebs                uint32
 }

 // WriteToDb to write a meter profile to DB
 func (vm *VoltMeter) WriteToDb(cntx context.Context) error {
 	vm.Version = database.PresentVersionMap[database.MeterPath]
 	b, err := json.Marshal(vm)
 	if err != nil {
 		return err
 	}
 	if err1 := db.PutMeter(cntx, vm.Name, string(b)); err1 != nil {
 		return err1
 	}
 	return nil
 }

 // DelFromDb to delete a meter profile from DB
 func (vm *VoltMeter) DelFromDb(cntx context.Context) {
 	_ = db.DelMeter(cntx, vm.Name)
 }

 // GetMeterByName to get meter by name
 func (m *MeterMgr) GetMeterByName(name string) (*VoltMeter, bool) {
 	meter, ok := m.Meters.Load(name)
 	logger.Infow(ctx, "Meter Obtained Name", log.Fields{"Meter": meter})
 	if ok {
 		return meter.(*VoltMeter), ok
 	}
 	return nil, ok
 }

 // GetMeterByID to get meter by ID
 func (m *MeterMgr) GetMeterByID(id uint32) (*VoltMeter, bool) {
 	meter, ok := m.MetersByID.Load(id)
 	logger.Infow(ctx, "Meter Obtained ID", log.Fields{"Meter": meter})
 	if ok {
 		return meter.(*VoltMeter), ok
 	}
 	return nil, ok
 }

 // AddMeter to add meter
 func (m *MeterMgr) AddMeter(meter *VoltMeter) {
 	m.Meters.Store(meter.Name, meter)
 	m.MetersByID.Store(meter.ID, meter)
 	logger.Infow(ctx, "Meter Added/Updated", log.Fields{"Meter": meter, "Name": meter.Name, "Id": meter.ID})
 }

 // DelMeter to delete meter
 func (m *MeterMgr) DelMeter(meter *VoltMeter) {
 	m.Meters.Delete(meter.Name)
 	m.MetersByID.Delete(meter.ID)
 	logger.Infow(ctx, "Meter Deleted", log.Fields{"Meter": meter, "Name": meter.Name, "Id": meter.ID})
 }

 // AddToDevice to add meter to the device
 func (vm *VoltMeter) AddToDevice(port string, device string, aggVM *VoltMeter) {
 	logger.Debugw(ctx, "Adding Meter To Device", log.Fields{"Id": vm.ID, "Device": device, "Port": port})
 	meter := of.NewMeter(vm.ID)
 	// meter.AddBand(vm.Air, vm.BurstSize)
 	// meter.AddBand(vm.Eir, vm.BurstSize)
 	// if aggVM != nil {
 	// 	meter.AddBand(aggVM.Air, aggVM.BurstSize)
 	// 	meter.AddBand(aggVM.Eir, aggVM.BurstSize)
 	// }

 	//Community VGC Impl

 	//Set Cir
 	if vm.Cir != 0 {
 		meter.AddBand(vm.Cir, vm.Cbs)
 	}

 	//Set Air to 0 if both air & gir are set
 	if vm.Air != 0 && vm.Gir != 0 {
 		vm.Air = 0
 	}

 	// Set Pir & Pbs
 	var pir uint32
 	var pbs uint32
 	if vm.Pir != 0 {
 		pir = vm.Pir
 	} else {
 		pir = vm.Eir + vm.Cir + vm.Gir + vm.Air
 	}

 	if vm.Pbs != 0 {
 		pbs = vm.Pbs
 	} else {
 		pbs = vm.Ebs + vm.Cbs
 	}
 	meter.AddBand(pir, pbs)

 	//Set Gir
 	if vm.Gir != 0 {
 		meter.AddBand(vm.Gir, 0)
 	}

 	logger.Infow(ctx, "Meter Config", log.Fields{"Cir": vm.Cir, "Air": vm.Air, "Pir": vm.Pir, "Gir": vm.Gir, "Eir": vm.Eir})
 	logger.Infow(ctx, "Meter Burst Config", log.Fields{"Cbs": vm.Cbs, "Pbs": vm.Pbs})
 	logger.Infow(ctx, "Meter Burst Oper", log.Fields{"Pir": pir, "Pbs": pbs})
 	// Set Air
 	// Air is used in place of Gir only if Gir is
 	// not present and Air is not 0
 	if vm.Air != 0 {
 		meter.AddBand(vm.Air, 0)
 	}

 	logger.Debugw(ctx, "Total Bands are", log.Fields{"meter": *meter})
 	if err := cntlr.GetController().ModMeter(port, device, of.MeterCommandAdd, meter); err != nil {
 		logger.Warnw(ctx, "Add meter to device Failed", log.Fields{"Id": vm.ID, "meter": *meter, "Error": err})
 	}
 }

 // AddMeterToDevice to add meter to the device
 func (m *MeterMgr) AddMeterToDevice(port string, device string, meterID uint32, aggMeterID uint32) {
 	var aggVM *VoltMeter
 	vm, err := m.GetMeterByProfID(meterID)
 	if err == nil {
 		if 0 != aggMeterID { //Assuming valid meter id will never be 0
 			if aggVM, err = m.GetMeterByProfID(aggMeterID); err != nil {
 				logger.Warnw(ctx, "Aggregated Meter not found", log.Fields{"Id": aggMeterID})
 			}
 		}
 		vm.AddToDevice(port, device, aggVM)
 	} else {
 		logger.Warnw(ctx, "Meter not found", log.Fields{"Id": meterID})
 	}
 }

 // RestoreMetersFromDb to read from the DB and restore all the services
 func (m *MeterMgr) RestoreMetersFromDb(cntx context.Context) {
 	// VNETS must be learnt first
 	logger.Infow(ctx, "LastMeterID on restart", log.Fields{"LastMeterID": m.LastMeterID})
 	ms, _ := db.GetMeters(cntx)
 	for _, mt := range ms {
 		b, ok := mt.Value.([]byte)
 		if !ok {
 			logger.Warn(ctx, "The value type is not []byte")
 			continue
 		}
 		var meter VoltMeter
 		err := json.Unmarshal(b, &meter)
 		if err != nil {
 			logger.Warn(ctx, "Unmarshal of meter profile failed")
 			continue
 		}
 		logger.Infow(ctx, "Retrieved Meter", log.Fields{"Meter": meter.Name})
 		m.AddMeter(&meter)
 		if meter.ID > m.LastMeterID {
 			m.LastMeterID = meter.ID
 		}
 	}
 	logger.Infow(ctx, "LastMeterID on reading DB", log.Fields{"LastMeterID": m.LastMeterID})
 }

 // AddMeterProf to add the meter profile name as key
 func (va *VoltApplication) AddMeterProf(cntx context.Context, cfg VoltMeter) {
 	mm := &va.MeterMgr
 	if _, ok := mm.GetMeterByName(cfg.Name); ok {
 		logger.Warnw(ctx, "Meter profile exists", log.Fields{"Name": cfg.Name})
 		return
 	}

 	mm.LastMeterID++
 	// FIX-ME: Hardcoded the meter-id temp till meter delete is introduced
 	// Restriction: Only one meter profile should be used across all services
 	//	id := uint32(1) //mm.LastMeterId
 	id := mm.LastMeterID
 	cfg.ID = id
 	mm.AddMeter(&cfg)
 	if err := cfg.WriteToDb(cntx); err != nil {
 		logger.Warnw(ctx, "MeterProf Write to DB Failed", log.Fields{"MeterConfig": cfg, "Error": err})
 	}
 }

 // UpdateMeterProf to update the meter profile
 func (va *VoltApplication) UpdateMeterProf(cntx context.Context, cfg VoltMeter) {
 	mm := &va.MeterMgr
 	if _, ok := mm.GetMeterByName(cfg.Name); !ok {
 		logger.Warnw(ctx, "Meter profile does not exist", log.Fields{"Name": cfg.Name})
 		return
 	}
 	mm.AddMeter(&cfg)
 	if err := cfg.WriteToDb(cntx); err != nil {
 		logger.Warnw(ctx, "MeterProf Write to DB Failed", log.Fields{"MeterConfig": cfg, "Error": err})
 	}
 }

 // GetMeterByProfID to get a meter based on the identities of bandwidth profile and shaper
 // profile names.
 func (m *MeterMgr) GetMeterByProfID(id uint32) (*VoltMeter, error) {
 	if mtr, ok := m.GetMeterByID(id); ok {
 		return mtr, nil
 	}
 	return nil, errors.New("Meter Missing")
 }

 // GetMeter to get a meter based on the identities of bandwidth profile and shaper
 // profile names.
 func (m *MeterMgr) GetMeter(meterID string) (*VoltMeter, error) {
 	if mt, ok := m.GetMeterByName(meterID); ok {
 		return mt, nil
 	}
 	return nil, errors.New("Meter Missing")
 }

 // DeleteFromDevice to delete meter from the device
 func (vm *VoltMeter) DeleteFromDevice(port string, device string) {
 	meter := of.NewMeter(vm.ID)

 	logger.Debugw(ctx, "Delete meter from device", log.Fields{"Id": vm.ID, "meter": *meter})
 	if err := cntlr.GetController().ModMeter(port, device, of.MeterCommandDel, meter); err != nil {
 		logger.Warnw(ctx, "Delete meter from device Failed", log.Fields{"Id": vm.ID, "meter": *meter, "Error": err})
 	}
 }

 // DelMeterProf to delete meter profile
 func (va *VoltApplication) DelMeterProf(cntx context.Context, name string) error {
 	mm := &va.MeterMgr
 	if _, ok := mm.GetMeterByName(name); !ok {
 		logger.Warnw(ctx, "Meter profile does not exist", log.Fields{"Name": name})
 		return errors.New("Meter profile doesn't exist")
 	}
 	cfg, _ := mm.GetMeterByName(name)
 	if cfg.AssociatedServices != 0 {
 		logger.Warnw(ctx, "Mismatch in submgr and vgc oeter profile service reference",
 			log.Fields{"MeterProfile": name, "serviceCount": cfg.AssociatedServices})
 		return errors.New("Service reference is not 0")
 	}
 	// TODO : delete from all devices
 	delmeterFromDevice := func(key interface{}, value interface{}) bool {
 		device := key.(string)
 		port, _ := GetApplication().GetNniPort(device)
 		cfg.DeleteFromDevice(port, device)
 		return true
 	}
 	va.DevicesDisc.Range(delmeterFromDevice)
 	cfg.DelFromDb(cntx)
 	// Delete meter from device will be invoked by caller separately
 	mm.DelMeter(cfg)
 	return nil
 }
	/*
	* 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 application

	import (
	"context"
	"encoding/json"
	"errors"
	"sync"

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

	// VoltShaperConfig is shaper profile configuration structure
	type VoltShaperConfig struct {
	Name string
	BurstSize uint32
	}

	// VoltBwConfig is bandwidth profile configuration structure
	type VoltBwConfig struct {
	Name string
	Fir uint32
	Air uint32
	Eir uint32
	}

	// VoltBandwidthProf is bandwidth profile stored at VGC
	type VoltBandwidthProf struct {
	VoltBwConfig
	}

	// VoltShaperProf is shaper profile stored at VGC
	type VoltShaperProf struct {
	VoltShaperConfig
	}

	// VoltMeterProf is meter profile stored at VGC
	type VoltMeterProf struct {
	VoltMeter
	}

	// MeterMgr structure
	type MeterMgr struct {
	Meters sync.Map
	MetersByID sync.Map
	LastMeterID uint32
	}

	// Init to initialize MeterMgr
	func (m *MeterMgr) Init() {
	m.LastMeterID = 0
	}

	// VoltMeter : A VOLT meter is a combination of BW and shaper profiles
	// The ID is generated by the VOLT application
	type VoltMeter struct {
	Name string
	Version string
	ID uint32
	Fir uint32
	Air uint32
	Eir uint32
	BurstSize uint32
	AssociatedServices uint32
	Cir uint32
	Cbs uint32
	Pir uint32
	Pbs uint32
	Gir uint32
	Ebs uint32
	}

	// WriteToDb to write a meter profile to DB
	func (vm *VoltMeter) WriteToDb(cntx context.Context) error {
	vm.Version = database.PresentVersionMap[database.MeterPath]
	b, err := json.Marshal(vm)
	if err != nil {
	return err
	}
	if err1 := db.PutMeter(cntx, vm.Name, string(b)); err1 != nil {
	return err1
	}
	return nil
	}

	// DelFromDb to delete a meter profile from DB
	func (vm *VoltMeter) DelFromDb(cntx context.Context) {
	_ = db.DelMeter(cntx, vm.Name)
	}

	// GetMeterByName to get meter by name
	func (m MeterMgr) GetMeterByName(name string) (VoltMeter, bool) {
	meter, ok := m.Meters.Load(name)
	logger.Infow(ctx, "Meter Obtained Name", log.Fields{"Meter": meter})
	if ok {
	return meter.(*VoltMeter), ok
	}
	return nil, ok
	}

	// GetMeterByID to get meter by ID
	func (m MeterMgr) GetMeterByID(id uint32) (VoltMeter, bool) {
	meter, ok := m.MetersByID.Load(id)
	logger.Infow(ctx, "Meter Obtained ID", log.Fields{"Meter": meter})
	if ok {
	return meter.(*VoltMeter), ok
	}
	return nil, ok
	}

	// AddMeter to add meter
	func (m MeterMgr) AddMeter(meter VoltMeter) {
	m.Meters.Store(meter.Name, meter)
	m.MetersByID.Store(meter.ID, meter)
	logger.Infow(ctx, "Meter Added/Updated", log.Fields{"Meter": meter, "Name": meter.Name, "Id": meter.ID})
	}

	// DelMeter to delete meter
	func (m MeterMgr) DelMeter(meter VoltMeter) {
	m.Meters.Delete(meter.Name)
	m.MetersByID.Delete(meter.ID)
	logger.Infow(ctx, "Meter Deleted", log.Fields{"Meter": meter, "Name": meter.Name, "Id": meter.ID})
	}

	// AddToDevice to add meter to the device
	func (vm VoltMeter) AddToDevice(port string, device string, aggVM VoltMeter) {
	logger.Debugw(ctx, "Adding Meter To Device", log.Fields{"Id": vm.ID, "Device": device, "Port": port})
	meter := of.NewMeter(vm.ID)
	// meter.AddBand(vm.Air, vm.BurstSize)
	// meter.AddBand(vm.Eir, vm.BurstSize)
	// if aggVM != nil {
	// meter.AddBand(aggVM.Air, aggVM.BurstSize)
	// meter.AddBand(aggVM.Eir, aggVM.BurstSize)
	// }

	//Community VGC Impl

	//Set Cir
	if vm.Cir != 0 {
	meter.AddBand(vm.Cir, vm.Cbs)
	}

	//Set Air to 0 if both air & gir are set
	if vm.Air != 0 && vm.Gir != 0 {
	vm.Air = 0
	}

	// Set Pir & Pbs
	var pir uint32
	var pbs uint32
	if vm.Pir != 0 {
	pir = vm.Pir
	} else {
	pir = vm.Eir + vm.Cir + vm.Gir + vm.Air
	}

	if vm.Pbs != 0 {
	pbs = vm.Pbs
	} else {
	pbs = vm.Ebs + vm.Cbs
	}
	meter.AddBand(pir, pbs)

	//Set Gir
	if vm.Gir != 0 {
	meter.AddBand(vm.Gir, 0)
	}

	logger.Infow(ctx, "Meter Config", log.Fields{"Cir": vm.Cir, "Air": vm.Air, "Pir": vm.Pir, "Gir": vm.Gir, "Eir": vm.Eir})
	logger.Infow(ctx, "Meter Burst Config", log.Fields{"Cbs": vm.Cbs, "Pbs": vm.Pbs})
	logger.Infow(ctx, "Meter Burst Oper", log.Fields{"Pir": pir, "Pbs": pbs})
	// Set Air
	// Air is used in place of Gir only if Gir is
	// not present and Air is not 0
	if vm.Air != 0 {
	meter.AddBand(vm.Air, 0)
	}

	logger.Debugw(ctx, "Total Bands are", log.Fields{"meter": *meter})
	if err := cntlr.GetController().ModMeter(port, device, of.MeterCommandAdd, meter); err != nil {
	logger.Warnw(ctx, "Add meter to device Failed", log.Fields{"Id": vm.ID, "meter": *meter, "Error": err})
	}
	}

	// AddMeterToDevice to add meter to the device
	func (m *MeterMgr) AddMeterToDevice(port string, device string, meterID uint32, aggMeterID uint32) {
	var aggVM *VoltMeter
	vm, err := m.GetMeterByProfID(meterID)
	if err == nil {
	if 0 != aggMeterID { //Assuming valid meter id will never be 0
	if aggVM, err = m.GetMeterByProfID(aggMeterID); err != nil {
	logger.Warnw(ctx, "Aggregated Meter not found", log.Fields{"Id": aggMeterID})
	}
	}
	vm.AddToDevice(port, device, aggVM)
	} else {
	logger.Warnw(ctx, "Meter not found", log.Fields{"Id": meterID})
	}
	}

	// RestoreMetersFromDb to read from the DB and restore all the services
	func (m *MeterMgr) RestoreMetersFromDb(cntx context.Context) {
	// VNETS must be learnt first
	logger.Infow(ctx, "LastMeterID on restart", log.Fields{"LastMeterID": m.LastMeterID})
	ms, _ := db.GetMeters(cntx)
	for _, mt := range ms {
	b, ok := mt.Value.([]byte)
	if !ok {
	logger.Warn(ctx, "The value type is not []byte")
	continue
	}
	var meter VoltMeter
	err := json.Unmarshal(b, &meter)
	if err != nil {
	logger.Warn(ctx, "Unmarshal of meter profile failed")
	continue
	}
	logger.Infow(ctx, "Retrieved Meter", log.Fields{"Meter": meter.Name})
	m.AddMeter(&meter)
	if meter.ID > m.LastMeterID {
	m.LastMeterID = meter.ID
	}
	}
	logger.Infow(ctx, "LastMeterID on reading DB", log.Fields{"LastMeterID": m.LastMeterID})
	}

	// AddMeterProf to add the meter profile name as key
	func (va *VoltApplication) AddMeterProf(cntx context.Context, cfg VoltMeter) {
	mm := &va.MeterMgr
	if _, ok := mm.GetMeterByName(cfg.Name); ok {
	logger.Warnw(ctx, "Meter profile exists", log.Fields{"Name": cfg.Name})
	return
	}

	mm.LastMeterID++
	// FIX-ME: Hardcoded the meter-id temp till meter delete is introduced
	// Restriction: Only one meter profile should be used across all services
	// id := uint32(1) //mm.LastMeterId
	id := mm.LastMeterID
	cfg.ID = id
	mm.AddMeter(&cfg)
	if err := cfg.WriteToDb(cntx); err != nil {
	logger.Warnw(ctx, "MeterProf Write to DB Failed", log.Fields{"MeterConfig": cfg, "Error": err})
	}
	}

	// UpdateMeterProf to update the meter profile
	func (va *VoltApplication) UpdateMeterProf(cntx context.Context, cfg VoltMeter) {
	mm := &va.MeterMgr
	if _, ok := mm.GetMeterByName(cfg.Name); !ok {
	logger.Warnw(ctx, "Meter profile does not exist", log.Fields{"Name": cfg.Name})
	return
	}
	mm.AddMeter(&cfg)
	if err := cfg.WriteToDb(cntx); err != nil {
	logger.Warnw(ctx, "MeterProf Write to DB Failed", log.Fields{"MeterConfig": cfg, "Error": err})
	}
	}

	// GetMeterByProfID to get a meter based on the identities of bandwidth profile and shaper
	// profile names.
	func (m MeterMgr) GetMeterByProfID(id uint32) (VoltMeter, error) {
	if mtr, ok := m.GetMeterByID(id); ok {
	return mtr, nil
	}
	return nil, errors.New("Meter Missing")
	}

	// GetMeter to get a meter based on the identities of bandwidth profile and shaper
	// profile names.
	func (m MeterMgr) GetMeter(meterID string) (VoltMeter, error) {
	if mt, ok := m.GetMeterByName(meterID); ok {
	return mt, nil
	}
	return nil, errors.New("Meter Missing")
	}

	// DeleteFromDevice to delete meter from the device
	func (vm *VoltMeter) DeleteFromDevice(port string, device string) {
	meter := of.NewMeter(vm.ID)

	logger.Debugw(ctx, "Delete meter from device", log.Fields{"Id": vm.ID, "meter": *meter})
	if err := cntlr.GetController().ModMeter(port, device, of.MeterCommandDel, meter); err != nil {
	logger.Warnw(ctx, "Delete meter from device Failed", log.Fields{"Id": vm.ID, "meter": *meter, "Error": err})
	}
	}

	// DelMeterProf to delete meter profile
	func (va *VoltApplication) DelMeterProf(cntx context.Context, name string) error {
	mm := &va.MeterMgr
	if _, ok := mm.GetMeterByName(name); !ok {
	logger.Warnw(ctx, "Meter profile does not exist", log.Fields{"Name": name})
	return errors.New("Meter profile doesn't exist")
	}
	cfg, _ := mm.GetMeterByName(name)
	if cfg.AssociatedServices != 0 {
	logger.Warnw(ctx, "Mismatch in submgr and vgc oeter profile service reference",
	log.Fields{"MeterProfile": name, "serviceCount": cfg.AssociatedServices})
	return errors.New("Service reference is not 0")
	}
	// TODO : delete from all devices
	delmeterFromDevice := func(key interface{}, value interface{}) bool {
	device := key.(string)
	port, _ := GetApplication().GetNniPort(device)
	cfg.DeleteFromDevice(port, device)
	return true
	}
	va.DevicesDisc.Range(delmeterFromDevice)
	cfg.DelFromDb(cntx)
	// Delete meter from device will be invoked by caller separately
	mm.DelMeter(cfg)
	return nil
	}