Add more volume types in e2e and fix part of them.

- Add dir-link/dir-bindmounted/dir-link-bindmounted/blockfs volume types for e2e
tests.
- Return error if we cannot resolve volume path.
- Add GetFSGroup/GetMountRefs methods for mount.Interface.
- Fix fsGroup related e2e tests partially.

pkg/kubelet/cm/container_manager_linux_test.go

@@ -19,6 +19,7 @@ limitations under the License.
 package cm
 
 import (
+	"errors"
 	"fmt"
 	"io/ioutil"
 	"os"
@@ -107,6 +108,14 @@ func (mi *fakeMountInterface) SafeMakeDir(_, _ string, _ os.FileMode) error {
 	return nil
 }
 
+func (mi *fakeMountInterface) GetMountRefs(pathname string) ([]string, error) {
+	return nil, errors.New("not implemented")
+}
+
+func (mi *fakeMountInterface) GetFSGroup(pathname string) (int64, error) {
+	return -1, errors.New("not implemented")
+}
+
 func fakeContainerMgrMountInt() mount.Interface {
 	return &fakeMountInterface{
 		[]mount.MountPoint{

pkg/util/mount/exec_mount.go

@@ -151,3 +151,11 @@ func (m *execMounter) CleanSubPaths(podDir string, volumeName string) error {
 func (m *execMounter) SafeMakeDir(pathname string, base string, perm os.FileMode) error {
 	return m.wrappedMounter.SafeMakeDir(pathname, base, perm)
 }
+
+func (m *execMounter) GetMountRefs(pathname string) ([]string, error) {
+	return m.wrappedMounter.GetMountRefs(pathname)
+}
+
+func (m *execMounter) GetFSGroup(pathname string) (int64, error) {
+	return m.wrappedMounter.GetFSGroup(pathname)
+}

pkg/util/mount/exec_mount_test.go

@@ -19,6 +19,7 @@ limitations under the License.
 package mount
 
 import (
+	"errors"
 	"fmt"
 	"os"
 	"reflect"
@@ -163,3 +164,11 @@ func (fm *fakeMounter) CleanSubPaths(podDir string, volumeName string) error {
 func (fm *fakeMounter) SafeMakeDir(pathname string, base string, perm os.FileMode) error {
 	return nil
 }
+
+func (fm *fakeMounter) GetMountRefs(pathname string) ([]string, error) {
+	return nil, errors.New("not implemented")
+}
+
+func (fm *fakeMounter) GetFSGroup(pathname string) (int64, error) {
+	return -1, errors.New("not implemented")
+}

pkg/util/mount/exec_mount_unsupported.go

@@ -98,3 +98,11 @@ func (mounter *execMounter) CleanSubPaths(podDir string, volumeName string) erro
 func (mounter *execMounter) SafeMakeDir(pathname string, base string, perm os.FileMode) error {
 	return nil
 }
+
+func (mounter *execMounter) GetMountRefs(pathname string) ([]string, error) {
+	return nil, errors.New("not implemented")
+}
+
+func (mounter *execMounter) GetFSGroup(pathname string) (int64, error) {
+	return -1, errors.New("not implemented")
+}

pkg/util/mount/fake.go

@@ -17,6 +17,7 @@ limitations under the License.
 package mount
 
 import (
+	"errors"
 	"os"
 	"path/filepath"
 	"sync"
@@ -208,3 +209,16 @@ func (f *FakeMounter) CleanSubPaths(podDir string, volumeName string) error {
 func (mounter *FakeMounter) SafeMakeDir(pathname string, base string, perm os.FileMode) error {
 	return nil
 }
+
+func (f *FakeMounter) GetMountRefs(pathname string) ([]string, error) {
+	realpath, err := filepath.EvalSymlinks(pathname)
+	if err != nil {
+		// Ignore error in FakeMounter, because we actually didn't create files.
+		realpath = pathname
+	}
+	return getMountRefsByDev(f, realpath)
+}
+
+func (f *FakeMounter) GetFSGroup(pathname string) (int64, error) {
+	return -1, errors.New("GetFSGroup not implemented")
+}

pkg/util/mount/mount.go

@@ -108,6 +108,12 @@ type Interface interface {
 	// subpath starts. On the other hand, Interface.CleanSubPaths must be called
 	// when the pod finishes.
 	PrepareSafeSubpath(subPath Subpath) (newHostPath string, cleanupAction func(), err error)
+	// GetMountRefs finds all mount references to the path, returns a
+	// list of paths. Path could be a mountpoint path, device or a normal
+	// directory (for bind mount).
+	GetMountRefs(pathname string) ([]string, error)
+	// GetFSGroup returns FSGroup of the path.
+	GetFSGroup(pathname string) (int64, error)
 }
 
 type Subpath struct {
@@ -166,22 +172,19 @@ func (mounter *SafeFormatAndMount) FormatAndMount(source string, target string,
 	return mounter.formatAndMount(source, target, fstype, options)
 }
 
-// GetMountRefsByDev finds all references to the device provided
+// getMountRefsByDev finds all references to the device provided
 // by mountPath; returns a list of paths.
-func GetMountRefsByDev(mounter Interface, mountPath string) ([]string, error) {
+// Note that mountPath should be path after the evaluation of any symblolic links.
+func getMountRefsByDev(mounter Interface, mountPath string) ([]string, error) {
 	mps, err := mounter.List()
 	if err != nil {
 		return nil, err
 	}
-	slTarget, err := filepath.EvalSymlinks(mountPath)
-	if err != nil {
-		slTarget = mountPath
-	}
 
 	// Finding the device mounted to mountPath
 	diskDev := ""
 	for i := range mps {
-		if slTarget == mps[i].Path {
+		if mountPath == mps[i].Path {
 			diskDev = mps[i].Device
 			break
 		}
@@ -190,8 +193,8 @@ func GetMountRefsByDev(mounter Interface, mountPath string) ([]string, error) {
 	// Find all references to the device.
 	var refs []string
 	for i := range mps {
-		if mps[i].Device == diskDev || mps[i].Device == slTarget {
-			if mps[i].Path != slTarget {
+		if mps[i].Device == diskDev || mps[i].Device == mountPath {
+			if mps[i].Path != mountPath {
 				refs = append(refs, mps[i].Path)
 			}
 		}

pkg/util/mount/mount_linux.go

@@ -921,6 +921,31 @@ func (mounter *Mounter) SafeMakeDir(pathname string, base string, perm os.FileMo
 	return doSafeMakeDir(pathname, base, perm)
 }
 
+func (mounter *Mounter) GetMountRefs(pathname string) ([]string, error) {
+	realpath, err := filepath.EvalSymlinks(pathname)
+	if err != nil {
+		return nil, err
+	}
+	return getMountRefsByDev(mounter, realpath)
+}
+
+func (mounter *Mounter) GetFSGroup(pathname string) (int64, error) {
+	realpath, err := filepath.EvalSymlinks(pathname)
+	if err != nil {
+		return 0, err
+	}
+	return getFSGroup(realpath)
+}
+
+// This implementation is shared between Linux and NsEnterMounter
+func getFSGroup(pathname string) (int64, error) {
+	info, err := os.Stat(pathname)
+	if err != nil {
+		return 0, err
+	}
+	return int64(info.Sys().(*syscall.Stat_t).Gid), nil
+}
+
 // This implementation is shared between Linux and NsEnterMounter
 func doSafeMakeDir(pathname string, base string, perm os.FileMode) error {
 	glog.V(4).Infof("Creating directory %q within base %q", pathname, base)

pkg/util/mount/mount_linux_test.go

@@ -203,7 +203,7 @@ func TestGetMountRefsByDev(t *testing.T) {
 
 	for i, test := range tests {
 
-		if refs, err := GetMountRefsByDev(fm, test.mountPath); err != nil || !setEquivalent(test.expectedRefs, refs) {
+		if refs, err := getMountRefsByDev(fm, test.mountPath); err != nil || !setEquivalent(test.expectedRefs, refs) {
 			t.Errorf("%d. getMountRefsByDev(%q) = %v, %v; expected %v, nil", i, test.mountPath, refs, err, test.expectedRefs)
 		}
 	}

pkg/util/mount/mount_unsupported.go

@@ -126,3 +126,11 @@ func (mounter *Mounter) CleanSubPaths(podDir string, volumeName string) error {
 func (mounter *Mounter) SafeMakeDir(pathname string, base string, perm os.FileMode) error {
 	return unsupportedErr
 }
+
+func (mounter *Mounter) GetMountRefs(pathname string) ([]string, error) {
+	return nil, errors.New("not implemented")
+}
+
+func (mounter *Mounter) GetFSGroup(pathname string) (int64, error) {
+	return -1, errors.New("not implemented")
+}

pkg/util/mount/mount_windows.go

@@ -438,6 +438,20 @@ func getAllParentLinks(path string) ([]string, error) {
 	return links, nil
 }
 
+func (mounter *Mounter) GetMountRefs(pathname string) ([]string, error) {
+	realpath, err := filepath.EvalSymlinks(pathname)
+	if err != nil {
+		return nil, err
+	}
+	return getMountRefsByDev(mounter, realpath)
+}
+
+// Note that on windows, it always returns 0. We actually don't set FSGroup on
+// windows platform, see SetVolumeOwnership implementation.
+func (mounter *Mounter) GetFSGroup(pathname string) (int64, error) {
+	return 0, nil
+}
+
 // SafeMakeDir makes sure that the created directory does not escape given base directory mis-using symlinks.
 func (mounter *Mounter) SafeMakeDir(pathname string, base string, perm os.FileMode) error {
 	return doSafeMakeDir(pathname, base, perm)

pkg/util/mount/nsenter_mount.go

@@ -323,3 +323,19 @@ func (mounter *NsenterMounter) PrepareSafeSubpath(subPath Subpath) (newHostPath
 func (mounter *NsenterMounter) SafeMakeDir(pathname string, base string, perm os.FileMode) error {
 	return doSafeMakeDir(pathname, base, perm)
 }
+
+func (mounter *NsenterMounter) GetMountRefs(pathname string) ([]string, error) {
+	hostpath, err := mounter.ne.EvalSymlinks(pathname)
+	if err != nil {
+		return nil, err
+	}
+	return getMountRefsByDev(mounter, hostpath)
+}
+
+func (mounter *NsenterMounter) GetFSGroup(pathname string) (int64, error) {
+	kubeletpath, err := mounter.ne.KubeletPath(pathname)
+	if err != nil {
+		return 0, err
+	}
+	return getFSGroup(kubeletpath)
+}

pkg/util/mount/nsenter_mount_unsupported.go

@@ -98,3 +98,11 @@ func (*NsenterMounter) PrepareSafeSubpath(subPath Subpath) (newHostPath string,
 func (*NsenterMounter) CleanSubPaths(podDir string, volumeName string) error {
 	return nil
 }
+
+func (*NsenterMounter) GetMountRefs(pathname string) ([]string, error) {
+	return nil, errors.New("not implemented")
+}
+
+func (*NsenterMounter) GetFSGroup(pathname string) (int64, error) {
+	return -1, errors.New("not implemented")
+}

pkg/util/nsenter/nsenter.go

@@ -22,6 +22,7 @@ import (
 	"fmt"
 	"os"
 	"path/filepath"
+	"strings"
 
 	"k8s.io/utils/exec"
 
@@ -122,3 +123,25 @@ func (ne *Nsenter) SupportsSystemd() (string, bool) {
 	systemdRunPath, hasSystemd := ne.paths["systemd-run"]
 	return systemdRunPath, hasSystemd
 }
+
+// EvalSymlinks returns the path name on the host after evaluating symlinks on the
+// host.
+func (ne *Nsenter) EvalSymlinks(pathname string) (string, error) {
+	args := []string{"-m", pathname}
+	outBytes, err := ne.Exec("realpath", args).CombinedOutput()
+	if err != nil {
+		glog.Infof("failed to resolve symbolic links on %s: %v", pathname, err)
+		return "", err
+	}
+	return strings.TrimSpace(string(outBytes)), nil
+}
+
+// KubeletPath returns the path name that can be accessed by containerized
+// kubelet, after evaluating symlinks on the host.
+func (ne *Nsenter) KubeletPath(pathname string) (string, error) {
+	hostpath, err := ne.EvalSymlinks(pathname)
+	if err != nil {
+		return "", err
+	}
+	return filepath.Join(hostRootFsPath, hostpath), nil
+}

pkg/util/removeall/removeall_test.go

@@ -91,6 +91,14 @@ func (mounter *fakeMounter) SafeMakeDir(_, _ string, _ os.FileMode) error {
 	return nil
 }
 
+func (mounter *fakeMounter) GetMountRefs(pathname string) ([]string, error) {
+	return nil, errors.New("not implemented")
+}
+
+func (mounter *fakeMounter) GetFSGroup(pathname string) (int64, error) {
+	return -1, errors.New("not implemented")
+}
+
 func (mounter *fakeMounter) IsLikelyNotMountPoint(file string) (bool, error) {
 	name := path.Base(file)
 	if strings.HasPrefix(name, "mount") {

pkg/volume/host_path/host_path_test.go

@@ -17,6 +17,7 @@ limitations under the License.
 package host_path
 
 import (
+	"errors"
 	"fmt"
 	"os"
 	"testing"
@@ -388,6 +389,14 @@ func (fftc *fakeFileTypeChecker) SafeMakeDir(_, _ string, _ os.FileMode) error {
 	return nil
 }
 
+func (fftc *fakeFileTypeChecker) GetMountRefs(pathname string) ([]string, error) {
+	return nil, errors.New("not implemented")
+}
+
+func (fftc *fakeFileTypeChecker) GetFSGroup(pathname string) (int64, error) {
+	return -1, errors.New("not implemented")
+}
+
 func setUp() error {
 	err := os.MkdirAll("/tmp/ExistingFolder", os.FileMode(0755))
 	if err != nil {

pkg/volume/local/local.go

@@ -273,7 +273,7 @@ func (m *localVolumeMounter) SetUpAt(dir string, fsGroup *int64) error {
 	if !notMnt {
 		return nil
 	}
-	refs, err := mount.GetMountRefsByDev(m.mounter, m.globalPath)
+	refs, err := m.mounter.GetMountRefs(m.globalPath)
 	if fsGroup != nil {
 		if err != nil {
 			glog.Errorf("cannot collect mounting information: %s %v", m.globalPath, err)
@@ -282,11 +282,11 @@ func (m *localVolumeMounter) SetUpAt(dir string, fsGroup *int64) error {
 
 		if len(refs) > 0 {
 			fsGroupNew := int64(*fsGroup)
-			fsGroupSame, fsGroupOld, err := volume.IsSameFSGroup(m.globalPath, fsGroupNew)
+			fsGroupOld, err := m.mounter.GetFSGroup(m.globalPath)
 			if err != nil {
 				return fmt.Errorf("failed to check fsGroup for %s (%v)", m.globalPath, err)
 			}
-			if !fsGroupSame {
+			if fsGroupNew != fsGroupOld {
 				m.plugin.recorder.Eventf(m.pod, v1.EventTypeWarning, events.WarnAlreadyMountedVolume, "The requested fsGroup is %d, but the volume %s has GID %d. The volume may not be shareable.", fsGroupNew, m.volName, fsGroupOld)
 			}
 		}

pkg/volume/rbd/rbd.go

@@ -509,7 +509,7 @@ func (plugin *rbdPlugin) newUnmapperInternal(volName string, podUID types.UID, m
 }
 
 func (plugin *rbdPlugin) getDeviceNameFromOldMountPath(mounter mount.Interface, mountPath string) (string, error) {
-	refs, err := mount.GetMountRefsByDev(mounter, mountPath)
+	refs, err := mounter.GetMountRefs(mountPath)
 	if err != nil {
 		return "", err
 	}

pkg/volume/volume_linux.go

@@ -89,17 +89,3 @@ func SetVolumeOwnership(mounter Mounter, fsGroup *int64) error {
 		return nil
 	})
 }
-
-// IsSameFSGroup is called only for requests to mount an already mounted
-// volume. It checks if fsGroup of new mount request is the same or not.
-// It returns false if it not the same. It also returns current Gid of a path
-// provided for dir variable.
-func IsSameFSGroup(dir string, fsGroup int64) (bool, int, error) {
-	info, err := os.Stat(dir)
-	if err != nil {
-		glog.Errorf("Error getting stats for %s (%v)", dir, err)
-		return false, 0, err
-	}
-	s := info.Sys().(*syscall.Stat_t)
-	return int(s.Gid) == int(fsGroup), int(s.Gid), nil
-}

pkg/volume/volume_unsupported.go

@@ -21,7 +21,3 @@ package volume
 func SetVolumeOwnership(mounter Mounter, fsGroup *int64) error {
 	return nil
 }
-
-func IsSameFSGroup(dir string, fsGroup int64) (bool, int, error) {
-	return true, int(fsGroup), nil
-}

test/e2e/storage/persistent_volumes-local.go

@@ -63,26 +63,44 @@ type localVolumeType string
 const (
 	// default local volume type, aka a directory
 	DirectoryLocalVolumeType localVolumeType = "dir"
+	// like DirectoryLocalVolumeType but it's a symbolic link to directory
+	DirectoryLinkLocalVolumeType localVolumeType = "dir-link"
+	// like DirectoryLocalVolumeType but bind mounted
+	DirectoryBindMountedLocalVolumeType localVolumeType = "dir-bindmounted"
+	// like DirectoryLocalVolumeType but it's a symbolic link to self bind mounted directory
+	// Note that bind mounting at symbolic link actually mounts at directory it
+	// links to.
+	DirectoryLinkBindMountedLocalVolumeType localVolumeType = "dir-link-bindmounted"
 	// creates a tmpfs and mounts it
 	TmpfsLocalVolumeType localVolumeType = "tmpfs"
 	// tests based on local ssd at /mnt/disks/by-uuid/
 	GCELocalSSDVolumeType localVolumeType = "gce-localssd-scsi-fs"
 	// Creates a local file, formats it, and maps it as a block device.
 	BlockLocalVolumeType localVolumeType = "block"
+	// Creates a local file, formats it, and mounts it to use as local volume.
+	BlockFsLocalVolumeType localVolumeType = "blockfs"
 )
 
 var setupLocalVolumeMap = map[localVolumeType]func(*localTestConfig, *v1.Node) *localTestVolume{
-	GCELocalSSDVolumeType:    setupLocalVolumeGCELocalSSD,
-	TmpfsLocalVolumeType:     setupLocalVolumeTmpfs,
-	DirectoryLocalVolumeType: setupLocalVolumeDirectory,
-	BlockLocalVolumeType:     setupLocalVolumeBlock,
+	GCELocalSSDVolumeType:                   setupLocalVolumeGCELocalSSD,
+	TmpfsLocalVolumeType:                    setupLocalVolumeTmpfs,
+	DirectoryLocalVolumeType:                setupLocalVolumeDirectory,
+	DirectoryLinkLocalVolumeType:            setupLocalVolumeDirectoryLink,
+	DirectoryBindMountedLocalVolumeType:     setupLocalVolumeDirectoryBindMounted,
+	DirectoryLinkBindMountedLocalVolumeType: setupLocalVolumeDirectoryLinkBindMounted,
+	BlockLocalVolumeType:                    setupLocalVolumeBlock,
+	BlockFsLocalVolumeType:                  setupLocalVolumeBlockFs,
 }
 
 var cleanupLocalVolumeMap = map[localVolumeType]func(*localTestConfig, *localTestVolume){
-	GCELocalSSDVolumeType:    cleanupLocalVolumeGCELocalSSD,
-	TmpfsLocalVolumeType:     cleanupLocalVolumeTmpfs,
-	DirectoryLocalVolumeType: cleanupLocalVolumeDirectory,
-	BlockLocalVolumeType:     cleanupLocalVolumeBlock,
+	GCELocalSSDVolumeType:                   cleanupLocalVolumeGCELocalSSD,
+	TmpfsLocalVolumeType:                    cleanupLocalVolumeTmpfs,
+	DirectoryLocalVolumeType:                cleanupLocalVolumeDirectory,
+	DirectoryLinkLocalVolumeType:            cleanupLocalVolumeDirectoryLink,
+	DirectoryBindMountedLocalVolumeType:     cleanupLocalVolumeDirectoryBindMounted,
+	DirectoryLinkBindMountedLocalVolumeType: cleanupLocalVolumeDirectoryLinkBindMounted,
+	BlockLocalVolumeType:                    cleanupLocalVolumeBlock,
+	BlockFsLocalVolumeType:                  cleanupLocalVolumeBlockFs,
 }
 
 type localTestVolume struct {
@@ -186,8 +204,7 @@ var _ = utils.SIGDescribe("PersistentVolumes-local ", func() {
 		}
 	})
 
-	localVolumeTypes := []localVolumeType{DirectoryLocalVolumeType, TmpfsLocalVolumeType, GCELocalSSDVolumeType, BlockLocalVolumeType}
-	for _, tempTestVolType := range localVolumeTypes {
+	for tempTestVolType := range setupLocalVolumeMap {
 
 		// New variable required for gingko test closures
 		testVolType := tempTestVolType
@@ -266,8 +283,21 @@ var _ = utils.SIGDescribe("PersistentVolumes-local ", func() {
 			})
 
 			Context("Set fsGroup for local volume", func() {
+				BeforeEach(func() {
+					if testVolType == BlockLocalVolumeType {
+						framework.Skipf("We don't set fsGroup on block device, skipped.")
+					}
+				})
 
 				It("should set fsGroup for one pod", func() {
+					skipTypes := sets.NewString(
+						string(DirectoryBindMountedLocalVolumeType),
+						string(DirectoryLinkBindMountedLocalVolumeType),
+					)
+					if skipTypes.Has(string(testVolType)) {
+						// TODO(cofyc): Test it when bug is fixed.
+						framework.Skipf("Skipped when volume type is %v", testVolType)
+					}
 					By("Checking fsGroup is set")
 					pod := createPodWithFsGroupTest(config, testVol, 1234, 1234)
 					By("Deleting pod")
@@ -275,6 +305,14 @@ var _ = utils.SIGDescribe("PersistentVolumes-local ", func() {
 				})
 
 				It("should set same fsGroup for two pods simultaneously", func() {
+					skipTypes := sets.NewString(
+						string(DirectoryBindMountedLocalVolumeType),
+						string(DirectoryLinkBindMountedLocalVolumeType),
+					)
+					if skipTypes.Has(string(testVolType)) {
+						// TODO(cofyc): Test it when bug is fixed.
+						framework.Skipf("Skipped when volume type is %v", testVolType)
+					}
 					fsGroup := int64(1234)
 					By("Create first pod and check fsGroup is set")
 					pod1 := createPodWithFsGroupTest(config, testVol, fsGroup, fsGroup)
@@ -287,6 +325,14 @@ var _ = utils.SIGDescribe("PersistentVolumes-local ", func() {
 				})
 
 				It("should set different fsGroup for second pod if first pod is deleted", func() {
+					skipTypes := sets.NewString(
+						string(DirectoryBindMountedLocalVolumeType),
+						string(DirectoryLinkBindMountedLocalVolumeType),
+					)
+					if skipTypes.Has(string(testVolType)) {
+						// TODO(cofyc): Test it when bug is fixed.
+						framework.Skipf("Skipped when volume type is %v", testVolType)
+					}
 					fsGroup1, fsGroup2 := int64(1234), int64(4321)
 					By("Create first pod and check fsGroup is set")
 					pod1 := createPodWithFsGroupTest(config, testVol, fsGroup1, fsGroup1)
@@ -300,7 +346,13 @@ var _ = utils.SIGDescribe("PersistentVolumes-local ", func() {
 				})
 
 				It("should not set different fsGroups for two pods simultaneously", func() {
-					if testVolType == DirectoryLocalVolumeType {
+					skipTypes := sets.NewString(
+						string(DirectoryLocalVolumeType),
+						string(DirectoryLinkLocalVolumeType),
+						string(DirectoryBindMountedLocalVolumeType),
+						string(DirectoryLinkBindMountedLocalVolumeType),
+					)
+					if skipTypes.Has(string(testVolType)) {
 						// TODO(cofyc): Test it when bug is fixed.
 						framework.Skipf("Skipped when volume type is %v", testVolType)
 					}
@@ -899,6 +951,39 @@ func setupLocalVolumeDirectory(config *localTestConfig, node *v1.Node) *localTes
 	return setupWriteTestFile(hostDir, config, DirectoryLocalVolumeType, node)
 }
 
+func setupLocalVolumeDirectoryLink(config *localTestConfig, node *v1.Node) *localTestVolume {
+	testDirName := "local-volume-test-" + string(uuid.NewUUID())
+	hostDir := filepath.Join(hostBase, testDirName)
+	hostDirBackend := hostDir + "-backend"
+	cmd := fmt.Sprintf("mkdir %s && ln -s %s %s", hostDirBackend, hostDirBackend, hostDir)
+	_, err := framework.IssueSSHCommandWithResult(cmd, framework.TestContext.Provider, node)
+	Expect(err).NotTo(HaveOccurred())
+	// Populate volume with testFile containing testFileContent.
+	return setupWriteTestFile(hostDir, config, DirectoryLinkLocalVolumeType, node)
+}
+
+func setupLocalVolumeDirectoryBindMounted(config *localTestConfig, node *v1.Node) *localTestVolume {
+	testDirName := "local-volume-test-" + string(uuid.NewUUID())
+	hostDir := filepath.Join(hostBase, testDirName)
+	cmd := fmt.Sprintf("mkdir %s && sudo mount --bind %s %s", hostDir, hostDir, hostDir)
+	_, err := framework.IssueSSHCommandWithResult(cmd, framework.TestContext.Provider, node)
+	Expect(err).NotTo(HaveOccurred())
+	// Populate volume with testFile containing testFileContent.
+	return setupWriteTestFile(hostDir, config, DirectoryBindMountedLocalVolumeType, node)
+}
+
+func setupLocalVolumeDirectoryLinkBindMounted(config *localTestConfig, node *v1.Node) *localTestVolume {
+	testDirName := "local-volume-test-" + string(uuid.NewUUID())
+	hostDir := filepath.Join(hostBase, testDirName)
+	hostDirBackend := hostDir + "-backend"
+	cmd := fmt.Sprintf("mkdir %s && sudo mount --bind %s %s && ln -s %s %s",
+		hostDirBackend, hostDirBackend, hostDirBackend, hostDirBackend, hostDir)
+	_, err := framework.IssueSSHCommandWithResult(cmd, framework.TestContext.Provider, node)
+	Expect(err).NotTo(HaveOccurred())
+	// Populate volume with testFile containing testFileContent.
+	return setupWriteTestFile(hostDir, config, DirectoryLinkBindMountedLocalVolumeType, node)
+}
+
 func setupLocalVolumeBlock(config *localTestConfig, node *v1.Node) *localTestVolume {
 	testDirName := "local-volume-test-" + string(uuid.NewUUID())
 	hostDir := filepath.Join(hostBase, testDirName)
@@ -911,6 +996,23 @@ func setupLocalVolumeBlock(config *localTestConfig, node *v1.Node) *localTestVol
 	return volume
 }
 
+func setupLocalVolumeBlockFs(config *localTestConfig, node *v1.Node) *localTestVolume {
+	testDirName := "local-volume-test-" + string(uuid.NewUUID())
+	hostDir := filepath.Join(hostBase, testDirName)
+	createAndMapBlockLocalVolume(config, hostDir, node)
+	loopDev := getBlockLoopDev(hostDir, node)
+	// format and mount at hostDir
+	// give others rwx for read/write testing
+	cmd := fmt.Sprintf("sudo mkfs -t ext4 %s && sudo mount -t ext4 %s %s && sudo chmod o+rwx %s", loopDev, loopDev, hostDir, hostDir)
+	_, err := framework.IssueSSHCommandWithResult(cmd, framework.TestContext.Provider, node)
+	Expect(err).NotTo(HaveOccurred())
+	// Populate block volume with testFile containing testFileContent.
+	volume := setupWriteTestFile(hostDir, config, BlockFsLocalVolumeType, node)
+	volume.hostDir = hostDir
+	volume.loopDevDir = loopDev
+	return volume
+}
+
 // Determine the /dev/loopXXX device associated with this test, via its hostDir.
 func getBlockLoopDev(hostDir string, node *v1.Node) string {
 	loopDevCmd := fmt.Sprintf("E2E_LOOP_DEV=$(sudo losetup | grep %s/file | awk '{ print $1 }') 2>&1 > /dev/null && echo ${E2E_LOOP_DEV}", hostDir)
@@ -956,6 +1058,35 @@ func cleanupLocalVolumeDirectory(config *localTestConfig, volume *localTestVolum
 	Expect(err).NotTo(HaveOccurred())
 }
 
+// Deletes the PVC/PV, and launches a pod with hostpath volume to remove the test directory.
+func cleanupLocalVolumeDirectoryLink(config *localTestConfig, volume *localTestVolume) {
+	By("Removing the test directory")
+	hostDir := volume.hostDir
+	hostDirBackend := hostDir + "-backend"
+	removeCmd := fmt.Sprintf("rm -r %s && rm -r %s", hostDir, hostDirBackend)
+	err := framework.IssueSSHCommand(removeCmd, framework.TestContext.Provider, volume.node)
+	Expect(err).NotTo(HaveOccurred())
+}
+
+// Deletes the PVC/PV, and launches a pod with hostpath volume to remove the test directory.
+func cleanupLocalVolumeDirectoryBindMounted(config *localTestConfig, volume *localTestVolume) {
+	By("Removing the test directory")
+	hostDir := volume.hostDir
+	removeCmd := fmt.Sprintf("sudo umount %s && rm -r %s", hostDir, hostDir)
+	err := framework.IssueSSHCommand(removeCmd, framework.TestContext.Provider, volume.node)
+	Expect(err).NotTo(HaveOccurred())
+}
+
+// Deletes the PVC/PV, and launches a pod with hostpath volume to remove the test directory.
+func cleanupLocalVolumeDirectoryLinkBindMounted(config *localTestConfig, volume *localTestVolume) {
+	By("Removing the test directory")
+	hostDir := volume.hostDir
+	hostDirBackend := hostDir + "-backend"
+	removeCmd := fmt.Sprintf("rm %s && sudo umount %s && rm -r %s", hostDir, hostDirBackend, hostDirBackend)
+	err := framework.IssueSSHCommand(removeCmd, framework.TestContext.Provider, volume.node)
+	Expect(err).NotTo(HaveOccurred())
+}
+
 // Deletes the PVC/PV and removes the test directory holding the block file.
 func cleanupLocalVolumeBlock(config *localTestConfig, volume *localTestVolume) {
 	volume.hostDir = volume.loopDevDir
@@ -966,6 +1097,19 @@ func cleanupLocalVolumeBlock(config *localTestConfig, volume *localTestVolume) {
 	Expect(err).NotTo(HaveOccurred())
 }
 
+// Deletes the PVC/PV and removes the test directory holding the block file.
+func cleanupLocalVolumeBlockFs(config *localTestConfig, volume *localTestVolume) {
+	// umount first
+	By("Umount blockfs mountpoint")
+	umountCmd := fmt.Sprintf("sudo umount %s", volume.hostDir)
+	err := framework.IssueSSHCommand(umountCmd, framework.TestContext.Provider, volume.node)
+	unmapBlockLocalVolume(config, volume.hostDir, volume.node)
+	By("Removing the test directory")
+	removeCmd := fmt.Sprintf("rm -r %s", volume.hostDir)
+	err = framework.IssueSSHCommand(removeCmd, framework.TestContext.Provider, volume.node)
+	Expect(err).NotTo(HaveOccurred())
+}
+
 func makeLocalPVCConfig(config *localTestConfig, volumeType localVolumeType) framework.PersistentVolumeClaimConfig {
 	pvcConfig := framework.PersistentVolumeClaimConfig{
 		AccessModes:      []v1.PersistentVolumeAccessMode{v1.ReadWriteOnce},