cleanup: resolve exhaustive linter

This commit resolves exhaustive linter
error.

Updates: #2240

Signed-off-by: Yati Padia <ypadia@redhat.com>

e2e/pod.go

@@ -314,12 +314,13 @@ func waitForPodInRunningState(name, ns string, c kubernetes.Interface, t int, ex
 					return true, err
 				}
 			}
-		}
+		case v1.PodUnknown:
 			e2elog.Logf(
 				"%s app  is in %s phase expected to be in Running  state (%d seconds elapsed)",
 				name,
 				pod.Status.Phase,
 				int(time.Since(start).Seconds()))
+		}
 		return false, nil
 	})
 }

internal/cephfs/clone.go

@@ -19,7 +19,6 @@ package cephfs
 import (
 	"context"
 	"errors"
-	"fmt"
 
 	"github.com/ceph/ceph-csi/internal/util"
 )
@@ -43,6 +42,23 @@ const (
 	snapshotIsProtected = "yes"
 )
 
+// toError checks the state of the clone if it's not cephFSCloneComplete.
+func (cs cephFSCloneState) toError() error {
+	switch cs {
+	case cephFSCloneComplete:
+		return nil
+	case cephFSCloneError:
+		return ErrInvalidClone
+	case cephFSCloneInprogress:
+		return ErrCloneInProgress
+	case cephFSClonePending:
+		return ErrClonePending
+	case cephFSCloneFailed:
+		return ErrCloneFailed
+	}
+	return nil
+}
+
 func createCloneFromSubvolume(ctx context.Context, volID, cloneID volumeID, volOpt, parentvolOpt *volumeOptions) error {
 	snapshotID := cloneID
 	err := parentvolOpt.createSnapshot(ctx, snapshotID, volID)
@@ -95,21 +111,14 @@ func createCloneFromSubvolume(ctx context.Context, volID, cloneID volumeID, volO
 
 	cloneState, cloneErr := volOpt.getCloneState(ctx, cloneID)
 	if cloneErr != nil {
+		util.ErrorLog(ctx, "failed to get clone state: %v", cloneErr)
 		return cloneErr
 	}
 
-	switch cloneState {
-	case cephFSCloneInprogress:
-		util.ErrorLog(ctx, "clone is in progress for %v", cloneID)
-		return ErrCloneInProgress
-	case cephFSClonePending:
-		util.ErrorLog(ctx, "clone is pending for %v", cloneID)
-		return ErrClonePending
-	case cephFSCloneFailed:
-		util.ErrorLog(ctx, "clone failed for %v", cloneID)
-		cloneFailedErr := fmt.Errorf("clone %s is in %s state", cloneID, cloneState)
-		return cloneFailedErr
-	case cephFSCloneComplete:
+	if cloneState != cephFSCloneComplete {
+		util.ErrorLog(ctx, "clone %s did not complete: %v", cloneID, cloneState.toError())
+		return cloneState.toError()
+	}
 	// This is a work around to fix sizing issue for cloned images
 	err = volOpt.resizeVolume(ctx, cloneID, volOpt.Size)
 	if err != nil {
@@ -130,7 +139,6 @@ func createCloneFromSubvolume(ctx context.Context, volID, cloneID volumeID, volO
 		util.ErrorLog(ctx, "failed to delete snapshot %s %v", snapshotID, err)
 		return err
 	}
-	}
 	return nil
 }
 
@@ -192,17 +200,13 @@ func createCloneFromSnapshot(
 
 	cloneState, err := volOptions.getCloneState(ctx, volumeID(vID.FsSubvolName))
 	if err != nil {
+		util.ErrorLog(ctx, "failed to get clone state: %v", err)
 		return err
 	}
 
-	switch cloneState {
-	case cephFSCloneInprogress:
-		return ErrCloneInProgress
-	case cephFSClonePending:
-		return ErrClonePending
-	case cephFSCloneFailed:
-		return fmt.Errorf("clone %s is in %s state", vID.FsSubvolName, cloneState)
-	case cephFSCloneComplete:
+	if cloneState != cephFSCloneComplete {
+		return cloneState.toError()
+	}
 	// The clonedvolume currently does not reflect the proper size due to an issue in cephfs
 	// however this is getting addressed in cephfs and the parentvolume size will be reflected
 	// in the new cloned volume too. Till then we are explicitly making the size set
@@ -211,7 +215,6 @@ func createCloneFromSnapshot(
 		util.ErrorLog(ctx, "failed to expand volume %s with error: %v", vID.FsSubvolName, err)
 		return err
 	}
-	}
 	return nil
 }
 

internal/cephfs/errors.go

@@ -33,6 +33,12 @@ var (
 	// ErrClonePending is returned when snapshot clone state is `pending`
 	ErrClonePending = errors.New("clone from snapshot is pending")
 
+	// ErrInvalidClone is returned when the clone state is invalid
+	ErrInvalidClone = errors.New("invalid clone state")
+
+	// ErrCloneFailed is returned when the clone state is failed.
+	ErrCloneFailed = errors.New("clone from snapshot failed")
+
 	// ErrInvalidVolID is returned when a CSI passed VolumeID is not conformant to any known volume ID
 	// formats.
 	ErrInvalidVolID = errors.New("invalid VolumeID")