Bugfix: remove PV dir when umount raw block device

pkg/volume/csi/csi_block.go

@@ -21,6 +21,7 @@ import (
 	"errors"
 	"fmt"
 	"os"
+	"path"
 	"path/filepath"
 
 	"k8s.io/klog"
@@ -367,5 +368,25 @@ func (m *csiBlockMapper) TearDownDevice(globalMapPath, devicePath string) error
 		}
 	}
 
+	dataDir := getVolumeDeviceDataDir(m.specName, m.plugin.host)
+
+	// remove ~/${pv}/data/vol_data.json first, then remove the other dir.
+	volDataFile := path.Join(dataDir, volDataFileName)
+	err = os.Remove(volDataFile)
+	if err != nil && !os.IsNotExist(err) {
+		return err
+	}
+	// remove ~/${pv}/data
+	err = os.Remove(dataDir)
+	if err != nil && !os.IsNotExist(err) {
+		return err
+	}
+
+	// remove ~/${pv}
+	pvPath := filepath.Dir(dataDir)
+	err = os.Remove(pvPath)
+	if err != nil && !os.IsNotExist(err) {
+		return err
+	}
 	return nil
 }