refact(pkg): Removes unused import, variables and functions. (#321)

Signed-off-by: Rahul Grover <rahulgrover99@gmail.com>

pkg/driver/agent.go

@@ -382,7 +382,7 @@ func (ns *node) NodeGetVolumeStats(
 		return nil, status.Error(codes.InvalidArgument, "path is not provided")
 	}
 
-	if mount.IsMountPath(path) == false {
+	if !mount.IsMountPath(path) {
 		return nil, status.Error(codes.NotFound, "path is not a mount path")
 	}
 

pkg/driver/controller.go

@@ -66,7 +66,7 @@ func NewController(d *CSIDriver) csi.ControllerServer {
 // SupportedVolumeCapabilityAccessModes contains the list of supported access
 // modes for the volume
 var SupportedVolumeCapabilityAccessModes = []*csi.VolumeCapability_AccessMode{
-	&csi.VolumeCapability_AccessMode{
+	{
 		Mode: csi.VolumeCapability_AccessMode_SINGLE_NODE_WRITER,
 	},
 }
@@ -102,7 +102,7 @@ func getRoundedCapacity(size int64) int64 {
 }
 
 func waitForVolDestroy(volname string) error {
-	for true {
+	for {
 		_, err := zfs.GetZFSVolume(volname)
 		if err != nil {
 			if k8serror.IsNotFound(err) {
@@ -114,11 +114,10 @@ func waitForVolDestroy(volname string) error {
 		time.Sleep(time.Second)
 		klog.Infof("waiting for volume to be destroyed %s", volname)
 	}
-	return nil
 }
 
 func waitForReadySnapshot(snapname string) error {
-	for true {
+	for {
 		snap, err := zfs.GetZFSSnapshot(snapname)
 		if err != nil {
 			return status.Errorf(codes.Internal,
@@ -131,7 +130,6 @@ func waitForReadySnapshot(snapname string) error {
 		}
 		time.Sleep(time.Second)
 	}
-	return nil
 }
 
 // CreateZFSVolume create new zfs volume from csi volume request
@@ -802,18 +800,6 @@ func (cs *controller) ListVolumes(
 	return nil, status.Error(codes.Unimplemented, "")
 }
 
-// validateCapabilities validates if provided capabilities
-// are supported by this driver
-func validateCapabilities(caps []*csi.VolumeCapability) bool {
-
-	for _, cap := range caps {
-		if !IsSupportedVolumeCapabilityAccessMode(cap.AccessMode.Mode) {
-			return false
-		}
-	}
-	return true
-}
-
 func (cs *controller) validateDeleteVolumeReq(req *csi.DeleteVolumeRequest) error {
 	volumeID := req.GetVolumeId()
 	if volumeID == "" {

pkg/driver/driver.go

@@ -22,13 +22,6 @@ import (
 	"k8s.io/klog"
 )
 
-// volume can only be published once as
-// read/write on a single node, at any
-// given time
-var supportedAccessMode = &csi.VolumeCapability_AccessMode{
-	Mode: csi.VolumeCapability_AccessMode_SINGLE_NODE_WRITER,
-}
-
 // CSIDriver defines a common data structure
 // for drivers
 // TODO check if this can be renamed to Base

pkg/driver/grpc.go

@@ -41,7 +41,7 @@ func parseEndpoint(ep string) (string, string, error) {
 			return s[0], s[1], nil
 		}
 	}
-	return "", "", fmt.Errorf("Invalid endpoint: %v", ep)
+	return "", "", fmt.Errorf("invalid endpoint: %v", ep)
 }
 
 //filters if the logd are informative or pollutant
@@ -68,13 +68,13 @@ func isInfotrmativeLog(info string) bool {
 func logGRPC(ctx context.Context, req interface{}, info *grpc.UnaryServerInfo, handler grpc.UnaryHandler) (interface{}, error) {
 
 	log := isInfotrmativeLog(info.FullMethod)
-	if log == true {
+	if log {
 		klog.Infof("GRPC call: %s requests %s", info.FullMethod, protosanitizer.StripSecrets(req))
 	}
 
 	resp, err := handler(ctx, req)
 
-	if log == true {
+	if log {
 		if err != nil {
 			klog.Errorf("GRPC error: %v", err)
 		} else {
@@ -127,7 +127,6 @@ func (s *nonBlockingGRPCServer) Start() {
 
 	go s.serve(s.endpoint, s.idntyServer, s.ctrlServer, s.agentServer)
 
-	return
 }
 
 // Wait for the service to stop

pkg/zfs/volume.go

@@ -28,7 +28,6 @@ import (
 	"github.com/openebs/zfs-localpv/pkg/builder/snapbuilder"
 	"github.com/openebs/zfs-localpv/pkg/builder/volbuilder"
 	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
-	v1 "k8s.io/apimachinery/pkg/apis/meta/v1"
 	"k8s.io/klog"
 )
 
@@ -225,7 +224,7 @@ func DeleteVolume(volumeID string) (err error) {
 
 // GetVolList fetches the current Published Volume list
 func GetVolList(volumeID string) (*apis.ZFSVolumeList, error) {
-	listOptions := v1.ListOptions{
+	listOptions := metav1.ListOptions{
 		LabelSelector: ZFSNodeKey + "=" + NodeID,
 	}
 

pkg/zfs/zfs_util.go

@@ -457,8 +457,7 @@ func CreateClone(vol *apis.ZFSVolume) error {
 	}
 
 	if err := getVolume(volume); err != nil {
-		var args []string
-		args = buildCloneCreateArgs(vol)
+		args := buildCloneCreateArgs(vol)
 		cmd := exec.Command(ZFSVolCmd, args...)
 		out, err := cmd.CombinedOutput()
 
@@ -749,7 +748,7 @@ func ResizeZFSVolume(vol *apis.ZFSVolume, mountpath string, resizefs bool) error
 		return err
 	}
 
-	if resizefs == true {
+	if resizefs {
 		// resize the filesystem so that applications can use the expanded space
 		err = handleVolResize(vol, mountpath)
 	}