Initial commit

pkg/driver/controllerserver.go

@@ -0,0 +1,493 @@
+/*
+Copyright 2021 Synology Inc.
+
+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 driver
+
+import (
+	"context"
+	"fmt"
+	"time"
+	"strconv"
+
+	"github.com/golang/protobuf/ptypes"
+	"github.com/container-storage-interface/spec/lib/go/csi"
+	"google.golang.org/grpc/codes"
+	"google.golang.org/grpc/status"
+
+	"github.com/SynologyOpenSource/synology-csi/pkg/dsm/webapi"
+	"github.com/SynologyOpenSource/synology-csi/pkg/interfaces"
+	"github.com/SynologyOpenSource/synology-csi/pkg/models"
+	"github.com/SynologyOpenSource/synology-csi/pkg/utils"
+)
+
+type controllerServer struct {
+	Driver     *Driver
+	dsmService interfaces.IDsmService
+	Initiator  *initiatorDriver
+}
+
+func getSizeByCapacityRange(capRange *csi.CapacityRange) (int64, error) {
+	if capRange == nil {
+		return 1 * utils.UNIT_GB, nil
+	}
+
+	minSize := capRange.GetRequiredBytes()
+	maxSize := capRange.GetLimitBytes()
+	if 0 < maxSize && maxSize < minSize {
+		return 0, status.Error(codes.InvalidArgument, "Invalid input: limitBytes is smaller than requiredBytes")
+	}
+	if minSize < utils.UNIT_GB {
+		return 0, status.Error(codes.InvalidArgument, "Invalid input: required bytes is smaller than 1G")
+	}
+
+	return int64(minSize), nil
+}
+
+func (cs *controllerServer) isVolumeAccessModeSupport(mode csi.VolumeCapability_AccessMode_Mode) bool {
+	for _, accessMode := range cs.Driver.getVolumeCapabilityAccessModes() {
+		if mode == accessMode.Mode {
+			return true
+		}
+	}
+
+	return false
+}
+
+func (cs *controllerServer) CreateVolume(ctx context.Context, req *csi.CreateVolumeRequest) (*csi.CreateVolumeResponse, error) {
+	sizeInByte, err := getSizeByCapacityRange(req.GetCapacityRange())
+	volName, volCap := req.GetName(), req.GetVolumeCapabilities()
+	volContentSrc := req.GetVolumeContentSource()
+
+	var srcSnapshotId string = ""
+	var srcVolumeId string = ""
+	var multiSession bool = false
+
+	if err != nil {
+		return nil, err
+	}
+
+	if volName == "" {
+		return nil, status.Errorf(codes.InvalidArgument, "No name is provided")
+	}
+
+	if volCap == nil {
+		return nil, status.Errorf(codes.InvalidArgument, "No volume capabilities are provided")
+	}
+
+	for _, cap := range volCap {
+		accessMode := cap.GetAccessMode().GetMode()
+
+		if !cs.isVolumeAccessModeSupport(accessMode) {
+			return nil, status.Errorf(codes.InvalidArgument, "Invalid volume capability access mode")
+		}
+
+		if accessMode == csi.VolumeCapability_AccessMode_SINGLE_NODE_WRITER {
+			multiSession = false
+		} else if accessMode == csi.VolumeCapability_AccessMode_MULTI_NODE_MULTI_WRITER {
+			multiSession = true
+		}
+	}
+
+	if volContentSrc != nil {
+		if srcSnapshot := volContentSrc.GetSnapshot(); srcSnapshot != nil {
+			srcSnapshotId = srcSnapshot.SnapshotId
+		} else if srcVolume := volContentSrc.GetVolume(); srcVolume != nil {
+			srcVolumeId = srcVolume.VolumeId
+		} else {
+			return nil, status.Errorf(codes.InvalidArgument, "Invalid volume content source")
+		}
+	}
+
+	params := req.GetParameters()
+
+	isThin := true
+	if params["thin_provisioning"] != "" {
+		isThin = utils.StringToBoolean(params["thin_provisioning"])
+	}
+
+	spec := &models.CreateK8sVolumeSpec{
+		DsmIp:            params["dsm"],
+		K8sVolumeName:    volName,
+		LunName:          fmt.Sprintf("%s-%s", models.LunPrefix, volName),
+		Location:         params["location"],
+		Size:             sizeInByte,
+		Type:             params["type"],
+		ThinProvisioning: isThin,
+		TargetName:       fmt.Sprintf("%s-%s", models.LunPrefix, volName),
+		MultipleSession:  multiSession,
+		SourceSnapshotId: srcSnapshotId,
+		SourceVolumeId:   srcVolumeId,
+	}
+
+	lunInfo, dsmIp, err := cs.dsmService.CreateVolume(spec)
+	if err != nil {
+		return nil, err
+	}
+
+	if int64(lunInfo.Size) != sizeInByte {
+		return nil , status.Errorf(codes.AlreadyExists, "Already existing volume name with different capacity")
+	}
+
+	return &csi.CreateVolumeResponse{
+		Volume: &csi.Volume{
+			VolumeId: lunInfo.Uuid,
+			CapacityBytes: int64(lunInfo.Size),
+			ContentSource: volContentSrc,
+			VolumeContext: map[string]string{
+				"dsm": dsmIp,
+			},
+		},
+	}, nil
+}
+
+func (cs *controllerServer) DeleteVolume(ctx context.Context, req *csi.DeleteVolumeRequest) (*csi.DeleteVolumeResponse, error) {
+	volumeId := req.GetVolumeId()
+	if volumeId == "" {
+		return nil, status.Errorf(codes.InvalidArgument, "No volume id is provided")
+	}
+
+	if err := cs.dsmService.DeleteVolume(volumeId); err != nil {
+		return nil, status.Errorf(codes.Internal,
+			fmt.Sprintf("Failed to DeleteVolume(%s), err: %v", volumeId, err))
+	}
+
+	return &csi.DeleteVolumeResponse{}, nil
+}
+
+func (cs *controllerServer) ControllerPublishVolume(ctx context.Context, req *csi.ControllerPublishVolumeRequest) (*csi.ControllerPublishVolumeResponse, error) {
+	return nil, status.Error(codes.Unimplemented, "")
+}
+
+func (cs *controllerServer) ControllerUnpublishVolume(ctx context.Context, req *csi.ControllerUnpublishVolumeRequest) (*csi.ControllerUnpublishVolumeResponse, error) {
+	return nil, status.Error(codes.Unimplemented, "")
+}
+
+func (cs *controllerServer) ValidateVolumeCapabilities(ctx context.Context, req *csi.ValidateVolumeCapabilitiesRequest) (*csi.ValidateVolumeCapabilitiesResponse, error) {
+	volumeId, volCap := req.GetVolumeId(), req.GetVolumeCapabilities()
+	if volumeId == "" {
+		return nil, status.Error(codes.InvalidArgument, "Volume ID missing in request")
+	}
+
+	if volCap == nil {
+		return nil, status.Error(codes.InvalidArgument, "No volume capabilities are provided")
+	}
+
+	if cs.dsmService.GetVolume(volumeId) == nil {
+		return nil, status.Errorf(codes.NotFound, "Volume[%s] does not exist", volumeId)
+	}
+
+	for _, cap := range volCap {
+		if !cs.isVolumeAccessModeSupport(cap.GetAccessMode().GetMode()) {
+			return nil, status.Errorf(codes.NotFound, "Driver does not support volume capabilities:%v", volCap)
+		}
+	}
+
+	return &csi.ValidateVolumeCapabilitiesResponse{}, nil
+}
+
+func (cs *controllerServer) ListVolumes(ctx context.Context, req *csi.ListVolumesRequest) (*csi.ListVolumesResponse, error) {
+	maxEntries := req.GetMaxEntries()
+	startingToken := req.GetStartingToken()
+
+	var entries []*csi.ListVolumesResponse_Entry
+	var nextToken string = ""
+
+	if 0 > maxEntries {
+		return nil, status.Error(codes.InvalidArgument, "Max entries can not be negative.")
+	}
+
+	pagingSkip := ("" != startingToken)
+	infos := cs.dsmService.ListVolumes()
+
+	var count int32 = 0
+	for _, info := range infos {
+		if info.Lun.Uuid == startingToken {
+			pagingSkip = false
+		}
+
+		if pagingSkip {
+			continue
+		}
+
+		if maxEntries > 0 && count >= maxEntries {
+			nextToken = info.Lun.Uuid
+			break
+		}
+
+		entries = append(entries, &csi.ListVolumesResponse_Entry{
+			Volume: &csi.Volume{
+				VolumeId:      info.Lun.Uuid,
+				CapacityBytes: int64(info.Lun.Size),
+				VolumeContext: map[string]string{
+					"dsm":       info.DsmIp,
+					"lunName":   info.Lun.Name,
+					"targetIqn": info.Target.Iqn,
+				},
+			},
+		})
+
+		count++
+	}
+
+	if pagingSkip {
+		return nil, status.Errorf(codes.Aborted, fmt.Sprintf("Invalid StartingToken(%s)", startingToken))
+	}
+
+	return &csi.ListVolumesResponse{
+		Entries: entries,
+		NextToken: nextToken,
+	}, nil
+}
+
+func (cs *controllerServer) GetCapacity(ctx context.Context, req *csi.GetCapacityRequest) (*csi.GetCapacityResponse, error) {
+	params := req.GetParameters()
+
+	volInfos, err := cs.dsmService.ListDsmVolumes(params["dsm"])
+
+	if err != nil {
+		return nil, status.Error(codes.InvalidArgument, "Failed to list dsm volumes")
+	}
+
+	var availableCapacity int64 = 0
+
+	location := params["location"]
+	for _, info := range volInfos {
+		if location != "" && info.Path != location {
+			continue
+		}
+
+		freeSize, err := strconv.ParseInt(info.Free, 10, 64)
+		if err != nil {
+			continue
+		}
+
+		availableCapacity += freeSize
+	}
+
+	return &csi.GetCapacityResponse{
+		AvailableCapacity: availableCapacity,
+	}, nil
+}
+
+func (cs *controllerServer) ControllerGetCapabilities(ctx context.Context, req *csi.ControllerGetCapabilitiesRequest) (*csi.ControllerGetCapabilitiesResponse, error) {
+	return &csi.ControllerGetCapabilitiesResponse{
+		Capabilities: cs.Driver.csCap,
+	}, nil
+}
+
+func (cs *controllerServer) CreateSnapshot(ctx context.Context, req *csi.CreateSnapshotRequest) (*csi.CreateSnapshotResponse, error) {
+	srcVolId := req.GetSourceVolumeId()
+	snapshotName := req.GetName()
+	params := req.GetParameters()
+
+	if srcVolId == "" {
+		return nil, status.Error(codes.InvalidArgument, "Source volume id is empty.")
+	}
+
+	if snapshotName == "" {
+		return nil, status.Error(codes.InvalidArgument, "Snapshot name is empty.")
+	}
+
+	snapshotInfos, err := cs.dsmService.ListAllSnapshots()
+
+	if err != nil {
+		return nil, status.Errorf(codes.Internal, fmt.Sprintf("Failed to ListAllSnapshots(), err: %v", err))
+	}
+
+	// idempotency
+	for _, snapshotInfo := range snapshotInfos {
+		if snapshotInfo.Name == snapshotName {
+			if snapshotInfo.ParentUuid != srcVolId {
+				return nil, status.Errorf(codes.AlreadyExists, fmt.Sprintf("Snapshot [%s] already exists but volume id is incompatible", snapshotName))
+			}
+
+			createTime, err := ptypes.TimestampProto(time.Unix(snapshotInfo.CreateTime, 0))
+
+			if err != nil {
+				return nil, status.Errorf(codes.Internal, fmt.Sprintf("Failed to convert create time, err: %v", err))
+			}
+
+			return &csi.CreateSnapshotResponse{
+				Snapshot: &csi.Snapshot{
+					SizeBytes: snapshotInfo.TotalSize,
+					SnapshotId: snapshotInfo.Uuid,
+					SourceVolumeId: snapshotInfo.ParentUuid,
+					CreationTime: createTime,
+					ReadyToUse: (snapshotInfo.Status == "Healthy"),
+				},
+			}, nil
+		}
+	}
+
+	spec := &models.CreateK8sVolumeSnapshotSpec{
+		K8sVolumeId:  srcVolId,
+		SnapshotName: snapshotName,
+		Description:  params["description"],
+		TakenBy:      models.K8sCsiName,
+		IsLocked:     utils.StringToBoolean(params["is_locked"]),
+	}
+
+	snapshotId, err := cs.dsmService.CreateSnapshot(spec)
+
+	if err != nil {
+		if err == utils.OutOfFreeSpaceError("") || err == utils.SnapshotReachMaxCountError("") {
+			return nil,status.Errorf(codes.ResourceExhausted, fmt.Sprintf("Failed to CreateSnapshot(%s), err: %v", srcVolId, err))
+		} else {
+			return nil, status.Errorf(codes.Internal, fmt.Sprintf("Failed to CreateSnapshot(%s), err: %v", srcVolId, err))
+		}
+	}
+
+	snapshotInfo, err := cs.dsmService.GetSnapshot(snapshotId)
+
+	if err != nil {
+		return nil, status.Errorf(codes.Internal, fmt.Sprintf("Failed to GetSnapshot(%s), err: %v", snapshotId, err))
+	}
+
+	createTime, err := ptypes.TimestampProto(time.Unix(snapshotInfo.CreateTime, 0))
+
+	if err != nil {
+		return nil, status.Errorf(codes.Internal, fmt.Sprintf("Failed to convert create time, err: %v", err))
+	}
+
+	return &csi.CreateSnapshotResponse{
+		Snapshot: &csi.Snapshot{
+			SizeBytes: snapshotInfo.TotalSize,
+			SnapshotId: snapshotInfo.Uuid,
+			SourceVolumeId: snapshotInfo.ParentUuid,
+			CreationTime: createTime,
+			ReadyToUse: (snapshotInfo.Status == "Healthy"),
+		},
+	}, nil
+}
+
+func (cs *controllerServer) DeleteSnapshot(ctx context.Context, req *csi.DeleteSnapshotRequest) (*csi.DeleteSnapshotResponse, error) {
+	snapshotId := req.GetSnapshotId()
+
+	if snapshotId == "" {
+		return nil, status.Error(codes.InvalidArgument, "Snapshot id is empty.")
+	}
+
+	err := cs.dsmService.DeleteSnapshot(snapshotId)
+	if err != nil {
+		return nil, status.Errorf(codes.Internal, fmt.Sprintf("Failed to DeleteSnapshot(%s), err: %v", snapshotId, err))
+	}
+
+	return &csi.DeleteSnapshotResponse{}, nil
+}
+
+func (cs *controllerServer) ListSnapshots(ctx context.Context, req *csi.ListSnapshotsRequest) (*csi.ListSnapshotsResponse, error) {
+	srcVolId := req.GetSourceVolumeId()
+	snapshotId := req.GetSnapshotId()
+	maxEntries := req.GetMaxEntries()
+	startingToken := req.GetStartingToken()
+
+	var entries []*csi.ListSnapshotsResponse_Entry
+	var nextToken string = ""
+
+	if 0 > maxEntries {
+		return nil, status.Error(codes.InvalidArgument, "Max entries can not be negative.")
+	}
+
+	pagingSkip := ("" != startingToken)
+	var snapshotInfos []webapi.SnapshotInfo
+	var err error
+
+	if (srcVolId != "") {
+		snapshotInfos, err = cs.dsmService.ListSnapshots(srcVolId)
+	} else {
+		snapshotInfos, err = cs.dsmService.ListAllSnapshots()
+	}
+
+	if err != nil {
+		return nil, status.Errorf(codes.Internal, fmt.Sprintf("Failed to ListSnapshots(%s), err: %v", srcVolId, err))
+	}
+
+	var count int32 = 0
+	for _, snapshotInfo := range snapshotInfos {
+		if snapshotInfo.Uuid == startingToken {
+			pagingSkip = false
+		}
+
+		if pagingSkip {
+			continue
+		}
+
+		if snapshotId != "" && snapshotInfo.Uuid != snapshotId {
+			continue
+		}
+
+		if maxEntries > 0 && count >= maxEntries {
+			nextToken = snapshotInfo.Uuid
+			break
+		}
+
+		createTime, err := ptypes.TimestampProto(time.Unix(snapshotInfo.CreateTime, 0))
+
+		if err != nil {
+			return nil, status.Errorf(codes.Internal, fmt.Sprintf("Failed to convert create time, err: %v", err))
+		}
+
+		entries = append(entries, &csi.ListSnapshotsResponse_Entry{
+			Snapshot: &csi.Snapshot{
+				SizeBytes: snapshotInfo.TotalSize,
+				SnapshotId: snapshotInfo.Uuid,
+				SourceVolumeId: snapshotInfo.ParentUuid,
+				CreationTime: createTime,
+				ReadyToUse: (snapshotInfo.Status == "Healthy"),
+			},
+		})
+
+		count++
+	}
+
+	if pagingSkip {
+		return nil, status.Errorf(codes.Aborted, fmt.Sprintf("Invalid StartingToken(%s)", startingToken))
+	}
+
+	return &csi.ListSnapshotsResponse{
+		Entries: entries,
+		NextToken: nextToken,
+	}, nil
+}
+
+func (cs *controllerServer) ControllerExpandVolume(ctx context.Context, req *csi.ControllerExpandVolumeRequest) (*csi.ControllerExpandVolumeResponse, error) {
+	volumeId, capRange := req.GetVolumeId(), req.GetCapacityRange()
+
+	if volumeId == "" || capRange == nil {
+		return nil, status.Error(codes.InvalidArgument,
+			"InvalidArgument: Please check volume ID and capacity range.")
+	}
+
+	sizeInByte, err := getSizeByCapacityRange(capRange)
+	if err != nil {
+		return nil, status.Errorf(codes.InvalidArgument,
+			"InvalidArgument: Please check CapacityRange[%v]", capRange)
+	}
+
+	if err := cs.dsmService.ExpandLun(volumeId, sizeInByte); err != nil {
+		return nil, status.Error(codes.Internal,
+			fmt.Sprintf("Failed to expand volume [%s], err: %v", volumeId, err))
+	}
+
+	return &csi.ControllerExpandVolumeResponse{
+		CapacityBytes: sizeInByte,
+		NodeExpansionRequired: true,
+	}, nil
+}
+
+func (cs *controllerServer) ControllerGetVolume(ctx context.Context, req *csi.ControllerGetVolumeRequest) (*csi.ControllerGetVolumeResponse, error) {
+	return nil, status.Error(codes.Unimplemented, "")
+}

pkg/driver/driver.go

@@ -0,0 +1,129 @@
+/*
+Copyright 2021 Synology Inc.
+
+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 driver
+
+import (
+	"github.com/container-storage-interface/spec/lib/go/csi"
+	log "github.com/sirupsen/logrus"
+	"github.com/SynologyOpenSource/synology-csi/pkg/interfaces"
+)
+
+const (
+	DriverName = "csi.san.synology.com" // CSI dirver name
+	DriverVersion = "1.0.0"
+)
+
+type IDriver interface {
+	Activate()
+}
+
+type Driver struct {
+	// *csicommon.CSIDriver
+	name       string
+	nodeID     string
+	version    string
+	endpoint   string
+	csCap      []*csi.ControllerServiceCapability
+	vCap       []*csi.VolumeCapability_AccessMode
+	nsCap      []*csi.NodeServiceCapability
+	DsmService interfaces.IDsmService
+}
+
+func NewControllerAndNodeDriver(nodeID string, endpoint string, dsmService interfaces.IDsmService) (*Driver, error) {
+	log.Debugf("NewControllerAndNodeDriver: DriverName: %v, DriverVersion: %v", DriverName, DriverVersion)
+
+	// TODO version format and validation
+	d := &Driver{
+		name:       DriverName,
+		version:    DriverVersion,
+		nodeID:     nodeID,
+		endpoint:   endpoint,
+		DsmService: dsmService,
+	}
+
+	d.addControllerServiceCapabilities([]csi.ControllerServiceCapability_RPC_Type{
+		csi.ControllerServiceCapability_RPC_CREATE_DELETE_VOLUME,
+		csi.ControllerServiceCapability_RPC_LIST_VOLUMES,
+		csi.ControllerServiceCapability_RPC_EXPAND_VOLUME,
+		csi.ControllerServiceCapability_RPC_CREATE_DELETE_SNAPSHOT,
+		csi.ControllerServiceCapability_RPC_LIST_SNAPSHOTS,
+		csi.ControllerServiceCapability_RPC_CLONE_VOLUME,
+		csi.ControllerServiceCapability_RPC_GET_CAPACITY,
+	})
+
+	d.addVolumeCapabilityAccessModes([]csi.VolumeCapability_AccessMode_Mode{
+		csi.VolumeCapability_AccessMode_SINGLE_NODE_WRITER,
+		csi.VolumeCapability_AccessMode_MULTI_NODE_MULTI_WRITER,
+	})
+
+	d.addNodeServiceCapabilities([]csi.NodeServiceCapability_RPC_Type{
+		csi.NodeServiceCapability_RPC_STAGE_UNSTAGE_VOLUME,
+		csi.NodeServiceCapability_RPC_EXPAND_VOLUME,
+	})
+
+	log.Infof("New driver created: name=%s, nodeID=%s, version=%s, endpoint=%s", d.name, d.nodeID, d.version, d.endpoint)
+	return d, nil
+}
+
+// TODO: func NewNodeDriver() {}
+// TODO: func NewControllerDriver() {}
+
+func (d *Driver) Activate() {
+	go func() {
+		RunControllerandNodePublishServer(d.endpoint, d, NewControllerServer(d), NewNodeServer(d))
+	}()
+}
+
+func (d *Driver) addControllerServiceCapabilities(cl []csi.ControllerServiceCapability_RPC_Type) {
+	var csc []*csi.ControllerServiceCapability
+
+	for _, c := range cl {
+		log.Debugf("Enabling controller service capability: %v", c.String())
+		csc = append(csc, NewControllerServiceCapability(c))
+	}
+
+	d.csCap = csc
+	return
+}
+
+func (d *Driver) addVolumeCapabilityAccessModes(vc []csi.VolumeCapability_AccessMode_Mode) {
+	var vca []*csi.VolumeCapability_AccessMode
+
+	for _, c := range vc {
+		log.Debugf("Enabling volume access mode: %v", c.String())
+		vca = append(vca, NewVolumeCapabilityAccessMode(c))
+	}
+
+	d.vCap = vca
+	return
+}
+
+func (d *Driver) addNodeServiceCapabilities(nsc []csi.NodeServiceCapability_RPC_Type) {
+	var nca []*csi.NodeServiceCapability
+
+	for _, c := range nsc {
+		log.Debugf("Enabling node service capability: %v", c.String())
+		nca = append(nca, NewNodeServiceCapability(c))
+	}
+
+	d.nsCap = nca
+	return
+}
+
+func (d *Driver) getVolumeCapabilityAccessModes() []*csi.VolumeCapability_AccessMode { // for debugging
+	return d.vCap
+}

pkg/driver/grpc.go

@@ -0,0 +1,114 @@
+/*
+Copyright 2021 Synology Inc.
+
+Copyright 2017 The Kubernetes Authors.
+
+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 driver
+
+import (
+	"net"
+	"os"
+	"sync"
+
+	log "github.com/sirupsen/logrus"
+	"google.golang.org/grpc"
+
+	"github.com/container-storage-interface/spec/lib/go/csi"
+)
+
+// Defines Non blocking GRPC server interfaces
+type NonBlockingGRPCServer interface {
+	// Start services at the endpoint
+	Start(endpoint string, ids csi.IdentityServer, cs csi.ControllerServer, ns csi.NodeServer)
+	// Waits for the service to stop
+	Wait()
+	// Stops the service gracefully
+	Stop()
+	// Stops the service forcefully
+	ForceStop()
+}
+
+func NewNonBlockingGRPCServer() NonBlockingGRPCServer {
+	return &nonBlockingGRPCServer{}
+}
+
+// NonBlocking server
+type nonBlockingGRPCServer struct {
+	wg     sync.WaitGroup
+	server *grpc.Server
+}
+
+func (s *nonBlockingGRPCServer) Start(endpoint string, ids csi.IdentityServer, cs csi.ControllerServer, ns csi.NodeServer) {
+
+	s.wg.Add(1)
+
+	go s.serve(endpoint, ids, cs, ns)
+
+	return
+}
+
+func (s *nonBlockingGRPCServer) Wait() {
+	s.wg.Wait()
+}
+
+func (s *nonBlockingGRPCServer) Stop() {
+	s.server.GracefulStop()
+}
+
+func (s *nonBlockingGRPCServer) ForceStop() {
+	s.server.Stop()
+}
+
+func (s *nonBlockingGRPCServer) serve(endpoint string, ids csi.IdentityServer, cs csi.ControllerServer, ns csi.NodeServer) {
+
+	proto, addr, err := ParseEndpoint(endpoint)
+	if err != nil {
+		log.Fatal(err.Error())
+	}
+
+	if proto == "unix" {
+		addr = "/" + addr
+		if err := os.Remove(addr); err != nil && !os.IsNotExist(err) {
+			log.Fatalf("Failed to remove %s, error: %s", addr, err.Error())
+		}
+	}
+
+	listener, err := net.Listen(proto, addr)
+	if err != nil {
+		log.Fatalf("Failed to listen: %v", err)
+	}
+
+	opts := []grpc.ServerOption{
+		grpc.UnaryInterceptor(logGRPC),
+	}
+	server := grpc.NewServer(opts...)
+	s.server = server
+
+	if ids != nil {
+		csi.RegisterIdentityServer(server, ids)
+	}
+	if cs != nil {
+		csi.RegisterControllerServer(server, cs)
+	}
+	if ns != nil {
+		csi.RegisterNodeServer(server, ns)
+	}
+
+	log.Infof("Listening for connections on address: %#v", listener.Addr())
+	if err := server.Serve(listener); err != nil {
+		log.Fatal(err.Error())
+	}
+}

pkg/driver/identityserver.go

@@ -0,0 +1,61 @@
+/*
+Copyright 2021 Synology Inc.
+
+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 driver
+
+import (
+	"context"
+	"google.golang.org/grpc/codes"
+	"google.golang.org/grpc/status"
+	"github.com/container-storage-interface/spec/lib/go/csi"
+)
+
+type identityServer struct {
+	Driver *Driver
+}
+
+func (ids *identityServer) GetPluginInfo(ctx context.Context, req *csi.GetPluginInfoRequest) (*csi.GetPluginInfoResponse, error) {
+	if ids.Driver.name == "" {
+		return nil, status.Error(codes.Unavailable, "Driver name not configured")
+	}
+
+	if ids.Driver.version == "" {
+		return nil, status.Error(codes.Unavailable, "Driver is missing version")
+	}
+
+	return &csi.GetPluginInfoResponse{
+		Name:          ids.Driver.name,
+		VendorVersion: ids.Driver.version,
+	}, nil
+}
+
+func (ids *identityServer) Probe(ctx context.Context, req *csi.ProbeRequest) (*csi.ProbeResponse, error) {
+	return &csi.ProbeResponse{}, nil
+}
+
+func (ids *identityServer) GetPluginCapabilities(ctx context.Context, req *csi.GetPluginCapabilitiesRequest) (*csi.GetPluginCapabilitiesResponse, error) {
+	return &csi.GetPluginCapabilitiesResponse{
+		Capabilities: []*csi.PluginCapability{
+			{
+				Type: &csi.PluginCapability_Service_{
+					Service: &csi.PluginCapability_Service{
+						Type: csi.PluginCapability_Service_CONTROLLER_SERVICE,
+					},
+				},
+			},
+		},
+	}, nil
+}

pkg/driver/initiator.go

@@ -0,0 +1,162 @@
+// Copyright 2021 Synology Inc.
+
+package driver
+
+import (
+	"errors"
+	"fmt"
+	"strings"
+
+	log "github.com/sirupsen/logrus"
+	utilexec "k8s.io/utils/exec"
+)
+
+type initiatorDriver struct {
+	chapUser string
+	chapPassword string
+}
+
+const (
+	ISCSIPort = 3260
+)
+
+func iscsiadm(cmdArgs ...string) utilexec.Cmd {
+	executor := utilexec.New()
+
+	return executor.Command("iscsiadm", cmdArgs...)
+}
+
+func iscsiadm_session() string {
+	cmd := iscsiadm("-m", "session")
+	out, err := cmd.CombinedOutput()
+	if err != nil {
+		exitErr, ok := err.(utilexec.ExitError)
+		if ok && exitErr.ExitStatus() == 21 { // iscsiadm: No active sessions
+			log.Info("No active iscsi session found.")
+		} else {
+			log.Errorf("Failed to run iscsiadm session: %v", err)
+		}
+		return ""
+	}
+
+	return string(out)
+}
+
+func iscsiadm_discovery(ip string) error {
+	cmd := iscsiadm(
+		"-m", "discoverydb",
+		"--type", "sendtargets",
+		"--portal", ip,
+		"--discover")
+	out, err := cmd.CombinedOutput()
+	if err != nil {
+		return fmt.Errorf("%s (%v)", string(out), err)
+	}
+	return nil
+}
+
+func iscsiadm_login(iqn, portal string) error {
+	cmd := iscsiadm(
+		"-m", "node",
+		"--targetname", iqn,
+		"--portal", portal,
+		"--login")
+	out, err := cmd.CombinedOutput()
+	if err != nil {
+		return fmt.Errorf("%s (%v)", string(out), err)
+	}
+	return nil
+}
+
+func iscsiadm_logout(iqn string) error {
+	cmd := iscsiadm(
+		"-m", "node",
+		"--targetname", iqn,
+		"--logout")
+	if _, err := cmd.CombinedOutput(); err != nil {
+		return err
+	}
+	return nil
+}
+
+func iscsiadm_rescan(iqn string) error {
+	cmd := iscsiadm(
+		"-m", "node",
+		"--targetname", iqn,
+		"-R")
+	if _, err := cmd.CombinedOutput(); err != nil {
+		return err
+	}
+	return nil
+}
+
+func hasSession(targetIqn string) bool{
+	sessions := iscsiadm_session();
+
+	for _, line := range strings.Split(sessions, "\n") {
+		if strings.Contains(line, targetIqn) {
+			return true
+		}
+	}
+
+	return false
+}
+
+func (d *initiatorDriver) login(targetIqn string, ip string) error{
+	portal := fmt.Sprintf("%s:%d", ip, ISCSIPort)
+
+	if (hasSession(targetIqn)) {
+		log.Infof("Session[%s] already exists.", targetIqn)
+		return nil
+	}
+
+	if err := iscsiadm_discovery(ip); err != nil {
+		log.Errorf("Failed in discovery of the target: %v", err)
+		return err
+	}
+
+	if err := iscsiadm_login(targetIqn, portal); err != nil {
+		log.Errorf("Failed in login of the target: %v", err)
+		return err
+	}
+
+	log.Infof("Login target portal [%s], iqn [%s].", portal, targetIqn)
+
+	return nil
+}
+
+func (d *initiatorDriver) logout(targetIqn string, ip string) error{
+	if (!hasSession(targetIqn)) {
+		log.Infof("Session[%s] doesn't exist.", targetIqn)
+		return nil
+	}
+
+	portal := fmt.Sprintf("%s:%d", ip, ISCSIPort)
+	if err := iscsiadm_logout(targetIqn); err != nil {
+		log.Errorf("Failed in logout of the target.\nTarget [%s], Portal [%s], Err[%v]",
+			targetIqn, portal, err)
+		return err
+	}
+
+	log.Infof("Logout target portal [%s], iqn [%s].", portal, targetIqn)
+
+	return nil
+}
+
+func (d *initiatorDriver) rescan(targetIqn string) error{
+	if (!hasSession(targetIqn)) {
+		msg := fmt.Sprintf("Session[%s] doesn't exist.", targetIqn)
+		log.Error(msg)
+		return errors.New(msg)
+	}
+
+	if err := iscsiadm_rescan(targetIqn); err != nil {
+		log.Errorf("Failed in rescan of the target.\nTarget [%s], Err[%v]",
+			targetIqn, err)
+		return err
+	}
+
+	log.Infof("Rescan target iqn [%s].", targetIqn)
+
+	return nil
+}

pkg/driver/nodeserver.go

@@ -0,0 +1,403 @@
+/*
+Copyright 2021 Synology Inc.
+
+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 driver
+
+import (
+	"context"
+	"fmt"
+	"os"
+	"strings"
+	"time"
+
+	"github.com/container-storage-interface/spec/lib/go/csi"
+	log "github.com/sirupsen/logrus"
+	"google.golang.org/grpc/codes"
+	"google.golang.org/grpc/status"
+	"k8s.io/mount-utils"
+
+	"github.com/SynologyOpenSource/synology-csi/pkg/interfaces"
+	"github.com/SynologyOpenSource/synology-csi/pkg/utils"
+)
+
+type nodeServer struct {
+	Driver *Driver
+	Mounter *mount.SafeFormatAndMount
+	dsmService interfaces.IDsmService
+	Initiator  *initiatorDriver
+}
+
+func getExistedDevicePath(paths []string) string {
+	ticker := time.NewTicker(1 * time.Second)
+	defer ticker.Stop()
+	timer := time.NewTimer(60 * time.Second)
+	defer timer.Stop()
+
+	for {
+		select {
+		case <-ticker.C:
+			for _, path := range paths {
+				exists, err := mount.PathExists(path)
+				if err == nil && exists == true {
+					return path
+				} else {
+					log.Errorf("Can't find device path [%s], err: %v", path, err)
+				}
+			}
+		case <-timer.C:
+			return ""
+		}
+	}
+}
+
+func (ns *nodeServer) getVolumeMountPath(volumeId string) string {
+	paths := []string{}
+
+	k8sVolume := ns.dsmService.GetVolume(volumeId)
+	if k8sVolume == nil {
+		log.Errorf("Failed to get Volume id:%d.")
+		return ""
+	}
+	// Assume target and lun 1-1 mapping
+	mappingIndex := k8sVolume.Target.MappedLuns[0].MappingIndex
+
+	ips, err := utils.LookupIPv4(k8sVolume.DsmIp)
+	if err != nil {
+		log.Errorf("Failed to lookup ipv4 for host: %s", k8sVolume.DsmIp)
+		paths = append(paths, fmt.Sprintf("%sip-%s:3260-iscsi-%s-lun-%d", "/dev/disk/by-path/", k8sVolume.DsmIp, k8sVolume.Target.Iqn, mappingIndex))
+	} else {
+		for _, ipv4 := range ips {
+			paths = append(paths, fmt.Sprintf("%sip-%s:3260-iscsi-%s-lun-%d", "/dev/disk/by-path/", ipv4, k8sVolume.Target.Iqn, mappingIndex))
+		}
+	}
+
+	path := getExistedDevicePath(paths)
+	if path == "" {
+		log.Errorf("Volume mount path is not exist.")
+		return ""
+	}
+
+	return path
+}
+
+func createTargetMountPath(mounter mount.Interface, mountPath string, isBlock bool) (bool, error) {
+	notMount, err := mount.IsNotMountPoint(mounter, mountPath)
+	if err != nil {
+		if os.IsNotExist(err) {
+			if isBlock {
+				pathFile, err := os.OpenFile(mountPath, os.O_CREATE|os.O_RDWR, 0750)
+				if err != nil {
+					log.Errorf("Failed to create mountPath:%s with error: %v", mountPath, err)
+					return notMount, err
+				}
+				if err = pathFile.Close(); err != nil {
+					log.Errorf("Failed to close mountPath:%s with error: %v", mountPath, err)
+					return notMount, err
+				}
+			} else {
+				err = os.MkdirAll(mountPath, 0750)
+				if err != nil {
+					return notMount, err
+				}
+			}
+			notMount = true
+		} else {
+			return false, err
+		}
+	}
+	return notMount, nil
+}
+
+func (ns *nodeServer) loginTarget(volumeId string) error {
+	k8sVolume := ns.dsmService.GetVolume(volumeId);
+
+	if k8sVolume == nil {
+		return status.Error(codes.NotFound, fmt.Sprintf("Volume[%s] is not found", volumeId))
+	}
+
+	if err := ns.Initiator.login(k8sVolume.Target.Iqn, k8sVolume.DsmIp); err != nil {
+		return status.Errorf(codes.Internal,
+			fmt.Sprintf("Failed to login with target iqn [%s], err: %v", k8sVolume.Target.Iqn, err))
+	}
+
+	return nil
+}
+
+func (ns *nodeServer) logoutTarget(volumeId string) {
+	k8sVolume := ns.dsmService.GetVolume(volumeId)
+
+	if k8sVolume == nil {
+		return
+	}
+
+	ns.Initiator.logout(k8sVolume.Target.Iqn, k8sVolume.DsmIp)
+}
+
+func (ns *nodeServer) NodeStageVolume(ctx context.Context, req *csi.NodeStageVolumeRequest) (*csi.NodeStageVolumeResponse, error) {
+	volumeId, stagingTargetPath, volumeCapability :=
+		req.GetVolumeId(), req.GetStagingTargetPath(), req.GetVolumeCapability()
+
+	if volumeId == "" || stagingTargetPath == "" || volumeCapability == nil {
+		return nil, status.Error(codes.InvalidArgument,
+		 "InvalidArgument: Please check volume ID, staging target path and volume capability.")
+	}
+
+	// if block mode, skip mount
+	if volumeCapability.GetBlock() != nil {
+		return &csi.NodeStageVolumeResponse{}, nil
+	}
+
+	if err := ns.loginTarget(volumeId); err != nil {
+		return nil, status.Error(codes.Internal, err.Error())
+	}
+
+	volumeMountPath := ns.getVolumeMountPath(volumeId)
+	if volumeMountPath == "" {
+		return nil, status.Error(codes.Internal, "Can't get volume mount path")
+	}
+
+	notMount, err := ns.Mounter.Interface.IsLikelyNotMountPoint(stagingTargetPath)
+	if err != nil {
+		return nil, status.Error(codes.Internal, err.Error())
+	}
+
+	if !notMount {
+		return &csi.NodeStageVolumeResponse{}, nil
+	}
+
+	fsType := volumeCapability.GetMount().GetFsType()
+	mountFlags := volumeCapability.GetMount().GetMountFlags()
+	options := append([]string{"rw"}, mountFlags...)
+
+	if err = ns.Mounter.FormatAndMount(volumeMountPath, stagingTargetPath, fsType, options); err != nil {
+		return nil, status.Error(codes.Internal, err.Error())
+	}
+
+	return &csi.NodeStageVolumeResponse{}, nil
+}
+
+func (ns *nodeServer) NodeUnstageVolume(ctx context.Context, req *csi.NodeUnstageVolumeRequest) (*csi.NodeUnstageVolumeResponse, error) {
+	if req.GetVolumeId() == "" { // Useless, just for sanity check
+		return nil, status.Error(codes.InvalidArgument, "Volume ID missing in request")
+	}
+
+	stagingTargetPath := req.GetStagingTargetPath()
+
+	if stagingTargetPath == "" {
+		return nil, status.Error(codes.InvalidArgument, "Target path missing in request")
+	}
+
+	notMount, err := mount.IsNotMountPoint(ns.Mounter.Interface, stagingTargetPath)
+	if err != nil {
+		return nil, status.Error(codes.Internal, err.Error())
+	}
+	if !notMount {
+		err = ns.Mounter.Interface.Unmount(stagingTargetPath)
+		if err != nil {
+			return nil, status.Error(codes.Internal, err.Error())
+		}
+	}
+
+	return &csi.NodeUnstageVolumeResponse{}, nil
+}
+
+func (ns *nodeServer) NodePublishVolume(ctx context.Context, req *csi.NodePublishVolumeRequest) (*csi.NodePublishVolumeResponse, error) {
+	volumeId, targetPath, stagingTargetPath := req.GetVolumeId(), req.GetTargetPath(), req.GetStagingTargetPath()
+	isBlock := req.GetVolumeCapability().GetBlock() != nil
+
+	if volumeId == "" || targetPath == "" || stagingTargetPath == "" {
+		return nil, status.Error(codes.InvalidArgument,
+			"InvalidArgument: Please check volume ID, target path and staging target path.")
+	}
+
+	notMount, err := createTargetMountPath(ns.Mounter.Interface, targetPath, isBlock)
+	if err != nil {
+		return nil, status.Error(codes.Internal, err.Error())
+	}
+	if !notMount {
+		return &csi.NodePublishVolumeResponse{}, nil
+	}
+
+	if err := ns.loginTarget(volumeId); err != nil {
+		return nil, status.Error(codes.Internal, err.Error())
+	}
+
+	volumeMountPath := ns.getVolumeMountPath(volumeId)
+	if volumeMountPath == "" {
+		return nil, status.Error(codes.Internal, "Can't get volume mount path")
+	}
+
+	options := []string{"bind"}
+	if req.GetReadonly() {
+		options = append(options, "ro")
+	}
+
+	if isBlock {
+		err = ns.Mounter.Interface.Mount(volumeMountPath, targetPath, "", options)
+	} else {
+		fsType := req.GetVolumeCapability().GetMount().GetFsType()
+		err = ns.Mounter.Interface.Mount(stagingTargetPath, targetPath, fsType, options)
+	}
+
+	if err != nil {
+		return nil, status.Error(codes.Internal, err.Error())
+	}
+
+	return &csi.NodePublishVolumeResponse{}, nil
+}
+
+func (ns *nodeServer) NodeUnpublishVolume(ctx context.Context, req *csi.NodeUnpublishVolumeRequest) (*csi.NodeUnpublishVolumeResponse, error) {
+	volumeId, targetPath := req.GetVolumeId(), req.GetTargetPath()
+	if volumeId == "" {
+		return nil, status.Error(codes.InvalidArgument, "Volume ID missing in request")
+	}
+	if targetPath == "" {
+		return nil, status.Error(codes.InvalidArgument, "Target path missing in request")
+	}
+
+	if _, err := os.Stat(targetPath); err != nil {
+		if os.IsNotExist(err){
+			return &csi.NodeUnpublishVolumeResponse{}, nil
+		}
+		return nil, status.Errorf(codes.Internal, err.Error())
+	}
+
+	notMount, err := mount.IsNotMountPoint(ns.Mounter.Interface, targetPath)
+
+	if err != nil {
+		return nil, status.Error(codes.Internal, err.Error())
+	}
+
+	if notMount {
+		return &csi.NodeUnpublishVolumeResponse{}, nil
+	}
+
+	needToLogout := true
+
+	list, err := ns.Mounter.Interface.GetMountRefs(targetPath)
+
+	if err != nil {
+		return nil, status.Error(codes.Internal, err.Error())
+	}
+
+	for _, path := range list {
+		filePrefix := "/var/lib/kubelet/pods/"
+		blkPrefix := "/var/lib/kubelet/plugins/kubernetes.io/csi/volumeDevices/publish/"
+
+		if strings.HasPrefix(path, filePrefix) || strings.HasPrefix(path, blkPrefix) {
+			needToLogout = false
+			break
+		}
+	}
+
+	if err := ns.Mounter.Interface.Unmount(targetPath); err != nil {
+		return nil, status.Error(codes.Internal, err.Error())
+	}
+
+	if err := os.Remove(targetPath); err != nil {
+		return nil, status.Errorf(codes.Internal, "Failed to remove target path.")
+	}
+
+	if needToLogout {
+		ns.logoutTarget(volumeId)
+	}
+
+	return &csi.NodeUnpublishVolumeResponse{}, nil
+}
+
+func (ns *nodeServer) NodeGetInfo(ctx context.Context, req *csi.NodeGetInfoRequest) (*csi.NodeGetInfoResponse, error) {
+	log.Debugf("Using default NodeGetInfo, ns.Driver.nodeID = [%s]", ns.Driver.nodeID)
+
+	return &csi.NodeGetInfoResponse{
+		NodeId: ns.Driver.nodeID,
+	}, nil
+}
+
+func (ns *nodeServer) NodeGetCapabilities(ctx context.Context, req *csi.NodeGetCapabilitiesRequest) (*csi.NodeGetCapabilitiesResponse, error) {
+	return &csi.NodeGetCapabilitiesResponse{
+		Capabilities: ns.Driver.nsCap,
+	}, nil
+}
+
+func (ns *nodeServer) NodeGetVolumeStats(ctx context.Context, req *csi.NodeGetVolumeStatsRequest) (*csi.NodeGetVolumeStatsResponse, error) {
+	volumeId, volumePath := req.GetVolumeId(), req.GetVolumePath()
+	if volumeId == "" || volumePath == "" {
+		return nil, status.Error(codes.InvalidArgument, "Invalid Argument")
+	}
+
+	k8sVolume := ns.dsmService.GetVolume(volumeId)
+	if k8sVolume == nil {
+		return nil, status.Error(codes.NotFound,
+			fmt.Sprintf("Volume[%s] is not found", volumeId))
+	}
+
+	notMount, err := mount.IsNotMountPoint(ns.Mounter.Interface, volumePath)
+	if err != nil || notMount {
+		return nil, status.Error(codes.NotFound,
+			fmt.Sprintf("Volume[%s] does not exist on the %s", volumeId, volumePath))
+	}
+
+	lun := k8sVolume.Lun
+
+	return &csi.NodeGetVolumeStatsResponse{
+		Usage: []*csi.VolumeUsage{
+			&csi.VolumeUsage{
+				Available: int64(lun.Size - lun.Used),
+				Total:     int64(lun.Size),
+				Used:      int64(lun.Used),
+				Unit:      csi.VolumeUsage_BYTES,
+			},
+		},
+	}, nil
+}
+
+func (ns *nodeServer) NodeExpandVolume(ctx context.Context, req *csi.NodeExpandVolumeRequest) (*csi.NodeExpandVolumeResponse, error) {
+	volumeId, volumePath := req.GetVolumeId(), req.GetVolumePath()
+	sizeInByte, err := getSizeByCapacityRange(req.GetCapacityRange())
+	if volumeId == "" || volumePath == "" {
+		return nil, status.Error(codes.InvalidArgument, "InvalidArgument: Please check volume ID and volume path.")
+	}
+
+	k8sVolume := ns.dsmService.GetVolume(volumeId)
+	if k8sVolume == nil {
+		return nil, status.Error(codes.NotFound, fmt.Sprintf("Volume[%s] is not found", volumeId))
+	}
+
+	if err := ns.Initiator.rescan(k8sVolume.Target.Iqn); err != nil {
+		return nil, status.Error(codes.Internal, fmt.Sprintf("Failed to rescan. err: %v", err))
+	}
+
+	isBlock := req.GetVolumeCapability() != nil && req.GetVolumeCapability().GetBlock() != nil
+	if isBlock {
+		return &csi.NodeExpandVolumeResponse{
+			CapacityBytes: sizeInByte}, nil
+	}
+
+	volumeMountPath := ns.getVolumeMountPath(volumeId)
+	if volumeMountPath == "" {
+		return nil, status.Error(codes.Internal, "Can't get volume mount path")
+	}
+
+	ok, err := mount.NewResizeFs(ns.Mounter.Exec).Resize(volumeMountPath, volumePath)
+	if err != nil {
+		return nil, status.Error(codes.Internal, err.Error())
+	}
+	if !ok {
+		return nil, status.Error(codes.Internal, "Failed to expand volume filesystem")
+	}
+	return &csi.NodeExpandVolumeResponse{
+		CapacityBytes: sizeInByte}, nil
+}

pkg/driver/utils.go

@@ -0,0 +1,113 @@
+/*
+Copyright 2021 Synology Inc.
+
+Copyright 2017 The Kubernetes Authors.
+
+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 driver
+
+import (
+	"context"
+	"fmt"
+	"strings"
+
+	"github.com/container-storage-interface/spec/lib/go/csi"
+	log "github.com/sirupsen/logrus"
+	"github.com/kubernetes-csi/csi-lib-utils/protosanitizer"
+	"google.golang.org/grpc"
+	"k8s.io/utils/exec"
+	"k8s.io/mount-utils"
+)
+
+func ParseEndpoint(ep string) (string, string, error) {
+	if strings.HasPrefix(strings.ToLower(ep), "unix://") || strings.HasPrefix(strings.ToLower(ep), "tcp://") {
+		s := strings.SplitN(ep, "://", 2)
+		if s[1] != "" {
+			return s[0], s[1], nil
+		}
+	}
+	return "", "", fmt.Errorf("Invalid endpoint: %v", ep)
+}
+
+func NewControllerServer(d *Driver) *controllerServer {
+	return &controllerServer{
+		Driver: d,
+		dsmService: d.DsmService,
+	}
+}
+
+func NewNodeServer(d *Driver) *nodeServer {
+	return &nodeServer{
+		Driver: d,
+		dsmService: d.DsmService,
+		Mounter: &mount.SafeFormatAndMount{
+			Interface: mount.New(""),
+			Exec: exec.New(),
+		},
+		Initiator: &initiatorDriver{
+			chapUser: "",
+			chapPassword: "",
+		},
+	}
+}
+
+func NewIdentityServer(d *Driver) *identityServer {
+	return &identityServer{
+		Driver: d,
+	}
+}
+
+func NewVolumeCapabilityAccessMode(mode csi.VolumeCapability_AccessMode_Mode) *csi.VolumeCapability_AccessMode {
+	return &csi.VolumeCapability_AccessMode{Mode: mode}
+}
+
+func NewControllerServiceCapability(cap csi.ControllerServiceCapability_RPC_Type) *csi.ControllerServiceCapability {
+	return &csi.ControllerServiceCapability{
+		Type: &csi.ControllerServiceCapability_Rpc{
+			Rpc: &csi.ControllerServiceCapability_RPC{
+				Type: cap,
+			},
+		},
+	}
+}
+
+func NewNodeServiceCapability(cap csi.NodeServiceCapability_RPC_Type) *csi.NodeServiceCapability {
+	return &csi.NodeServiceCapability{
+		Type: &csi.NodeServiceCapability_Rpc{
+			Rpc: &csi.NodeServiceCapability_RPC{
+				Type: cap,
+			},
+		},
+	}
+}
+
+func RunControllerandNodePublishServer(endpoint string, d *Driver, cs csi.ControllerServer, ns csi.NodeServer) {
+	ids := NewIdentityServer(d)
+
+	s := NewNonBlockingGRPCServer()
+	s.Start(endpoint, ids, cs, ns)
+}
+
+func logGRPC(ctx context.Context, req interface{}, info *grpc.UnaryServerInfo, handler grpc.UnaryHandler) (interface{}, error) {
+	log.Infof("GRPC call: %s", info.FullMethod)
+	log.Infof("GRPC request: %s", protosanitizer.StripSecrets(req))
+	resp, err := handler(ctx, req)
+	if err != nil {
+		log.Errorf("GRPC error: %v", err)
+	} else {
+		log.Infof("GRPC response: %s", protosanitizer.StripSecrets(resp))
+	}
+	return resp, err
+}