// can be applied to directories?
func (*VolumeProvider) GetQuotaApplier(mountpoint string, backingDev string) LinuxVolumeQuotaApplier {
	for _, fsType := range linuxSupportedFilesystems {
		if isFilesystemOfType(mountpoint, backingDev, fsType.typeMagic) {
			return linuxVolumeQuotaApplier{mountpoint: mountpoint,
				maxQuota:         fsType.maxQuota,
				allowEmptyOutput: fsType.allowEmptyOutput,
			}
		}
	}

			writeableSeparateFromReadOnly: false,
		},
		{
			name:                          "images and containers",
			imageFs:                       []*runtimeapi.FilesystemUsage{{FsId: &runtimeapi.FilesystemIdentifier{Mountpoint: "image"}}},
			containerFs:                   []*runtimeapi.FilesystemUsage{{FsId: &runtimeapi.FilesystemIdentifier{Mountpoint: "container"}}},

	// Get mount point data for the path
	mountPoints, err := mounter.List()
	if err != nil {
		return nil, fmt.Errorf("error listing mount points: %v", err)
	}
	// Find mount point for the path
	mountPoint, err := func(mps []mount.MountPoint, mpPath string) (*mount.MountPoint, error) {
		for _, mp := range mps {
			if mp.Path == mpPath {
				return &mp, nil
			}
		}

	m := mount.New("" /* default mount path */)
	mountPoints, err := m.List()
	if err != nil {
		logger.Error(err, "Failed to list mount points")
		return false, err
	}

	for _, mountPoint := range mountPoints {
		if mountPoint.Type != sysfsDevice {
			continue
		}
		// Check whether sysfs is 'rw'
		if len(mountPoint.Opts) > 0 && mountPoint.Opts[0] == permWritable {
			return true, nil
		}

			device := match[1]
			mount := match[2]
			if mount == mountpoint {
				return device, nil
			}
		}
	}
	return "", fmt.Errorf("couldn't find backing device for %s", mountpoint)
}

// detectBackingDev assumes that the mount point provided is valid
func detectBackingDev(_ mount.Interface, mountpoint string) (string, error) {
	return detectBackingDevInternal(mountpoint, common.MountsFile)
}

			},
		})
	_, err := validateSystemRequirements(mountInt)
	assert.Error(t, err)
}

func TestCgroupMountValidationMultipleSubsystem(t *testing.T) {
	if cgroups.IsCgroup2UnifiedMode() {
		t.Skip("skipping cgroup v1 test on a cgroup v2 system")
	}
	mountInt := mount.NewFakeMounter(
		[]mount.MountPoint{
			{
				Device: "cgroup",
				Type:   "cgroup",

        detector.detectUnsupportedFileSystems()
            .collect(Collectors.toList())
    }

    private static FileSystemInfo fs(String deviceName, String mountPoint, String type, boolean remote = false) {
        return new DefaultFileSystemInfo(Paths.get(mountPoint).toFile(), type, deviceName, remote, null)
    }

		},
	}
	for name, testcase := range testcasesMount {
		mountpoint, err := detectMountpointInternal(testcase.mounter, testcase.path)
		if err == nil && testcase.expectFailure {
			t.Errorf("Case %s expected failure, but succeeded, returning mountpoint %s", name, mountpoint)
		} else if err != nil {
			t.Errorf("Case %s failed: %s", name, err.Error())
		} else if mountpoint != testcase.expectedResult {

	testContainer = "container0"
	testSubpath   = 1
)

func setupFakeMounter(testMounts []string) *mount.FakeMounter {
	mounts := []mount.MountPoint{}
	for _, mountPoint := range testMounts {
		mounts = append(mounts, mount.MountPoint{Device: "/foo", Path: mountPoint})
	}
	return mount.NewFakeMounter(mounts)
}

func getTestPaths(base string) (string, string) {
	return filepath.Join(base, testVol),

	expectedNumFieldsPerLine = 6
	// Location of the mount file to use
	procMountsPath = "/proc/mounts"
)

// IsLikelyMountPoint determines if a directory is a mountpoint.
func IsLikelyMountPoint(path string) bool {
	s1, err := os.Lstat(path)
	if err != nil {
		return false
	}

	// A symlink can never be a mount point
	if s1.Mode()&os.ModeSymlink != 0 {
		return false
	}