Add generated file

This PR adds generated files under pkg/client and vendor folder.

vendor/k8s.io/kubernetes/pkg/volume/flexvolume/BUILD

@@ -0,0 +1,85 @@
+package(default_visibility = ["//visibility:public"])
+
+load(
+    "@io_bazel_rules_go//go:def.bzl",
+    "go_library",
+    "go_test",
+)
+
+go_library(
+    name = "go_default_library",
+    srcs = [
+        "attacher.go",
+        "attacher-defaults.go",
+        "detacher.go",
+        "detacher-defaults.go",
+        "driver-call.go",
+        "fake_watcher.go",
+        "mounter.go",
+        "mounter-defaults.go",
+        "plugin.go",
+        "plugin-defaults.go",
+        "probe.go",
+        "unmounter.go",
+        "unmounter-defaults.go",
+        "util.go",
+        "volume.go",
+    ],
+    importpath = "k8s.io/kubernetes/pkg/volume/flexvolume",
+    deps = [
+        "//pkg/util/filesystem:go_default_library",
+        "//pkg/util/mount:go_default_library",
+        "//pkg/util/strings:go_default_library",
+        "//pkg/volume:go_default_library",
+        "//pkg/volume/util:go_default_library",
+        "//vendor/github.com/fsnotify/fsnotify:go_default_library",
+        "//vendor/github.com/golang/glog:go_default_library",
+        "//vendor/k8s.io/api/core/v1:go_default_library",
+        "//vendor/k8s.io/apimachinery/pkg/types:go_default_library",
+        "//vendor/k8s.io/apimachinery/pkg/util/errors:go_default_library",
+        "//vendor/k8s.io/utils/exec:go_default_library",
+    ],
+)
+
+go_test(
+    name = "go_default_test",
+    srcs = [
+        "attacher_test.go",
+        "common_test.go",
+        "detacher_test.go",
+        "driver-call_test.go",
+        "flexvolume_test.go",
+        "mounter_test.go",
+        "plugin_test.go",
+        "probe_test.go",
+        "unmounter_test.go",
+    ],
+    embed = [":go_default_library"],
+    deps = [
+        "//pkg/util/filesystem:go_default_library",
+        "//pkg/util/mount:go_default_library",
+        "//pkg/volume:go_default_library",
+        "//pkg/volume/testing:go_default_library",
+        "//vendor/github.com/fsnotify/fsnotify:go_default_library",
+        "//vendor/github.com/stretchr/testify/assert:go_default_library",
+        "//vendor/k8s.io/api/core/v1:go_default_library",
+        "//vendor/k8s.io/apimachinery/pkg/apis/meta/v1:go_default_library",
+        "//vendor/k8s.io/apimachinery/pkg/types:go_default_library",
+        "//vendor/k8s.io/client-go/util/testing:go_default_library",
+        "//vendor/k8s.io/utils/exec:go_default_library",
+        "//vendor/k8s.io/utils/exec/testing:go_default_library",
+    ],
+)
+
+filegroup(
+    name = "package-srcs",
+    srcs = glob(["**"]),
+    tags = ["automanaged"],
+    visibility = ["//visibility:private"],
+)
+
+filegroup(
+    name = "all-srcs",
+    srcs = [":package-srcs"],
+    tags = ["automanaged"],
+)

vendor/k8s.io/kubernetes/pkg/volume/flexvolume/OWNERS

@@ -0,0 +1,15 @@
+approvers:
+- chakri-nelluri
+- saad-ali
+- MikaelCluseau
+reviewers:
+- ivan4th
+- rata
+- sjenning
+- saad-ali
+- jsafrane
+- rootfs
+- jingxu97
+- msau42
+- chakri-nelluri
+- MikaelCluseau

vendor/k8s.io/kubernetes/pkg/volume/flexvolume/attacher-defaults.go

@@ -0,0 +1,73 @@
+/*
+Copyright 2017 The Kubernetes Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package flexvolume
+
+import (
+	"time"
+
+	"github.com/golang/glog"
+
+	"k8s.io/apimachinery/pkg/types"
+	"k8s.io/kubernetes/pkg/util/mount"
+	"k8s.io/kubernetes/pkg/volume"
+)
+
+type attacherDefaults flexVolumeAttacher
+
+// Attach is part of the volume.Attacher interface
+func (a *attacherDefaults) Attach(spec *volume.Spec, hostName types.NodeName) (string, error) {
+	glog.Warning(logPrefix(a.plugin.flexVolumePlugin), "using default Attach for volume ", spec.Name, ", host ", hostName)
+	return "", nil
+}
+
+// WaitForAttach is part of the volume.Attacher interface
+func (a *attacherDefaults) WaitForAttach(spec *volume.Spec, devicePath string, timeout time.Duration) (string, error) {
+	glog.Warning(logPrefix(a.plugin.flexVolumePlugin), "using default WaitForAttach for volume ", spec.Name, ", device ", devicePath)
+	return devicePath, nil
+}
+
+// GetDeviceMountPath is part of the volume.Attacher interface
+func (a *attacherDefaults) GetDeviceMountPath(spec *volume.Spec, mountsDir string) (string, error) {
+	return a.plugin.getDeviceMountPath(spec)
+}
+
+// MountDevice is part of the volume.Attacher interface
+func (a *attacherDefaults) MountDevice(spec *volume.Spec, devicePath string, deviceMountPath string, mounter mount.Interface) error {
+	glog.Warning(logPrefix(a.plugin.flexVolumePlugin), "using default MountDevice for volume ", spec.Name, ", device ", devicePath, ", deviceMountPath ", deviceMountPath)
+
+	volSourceFSType, err := getFSType(spec)
+	if err != nil {
+		return err
+	}
+
+	readOnly, err := getReadOnly(spec)
+	if err != nil {
+		return err
+	}
+
+	options := make([]string, 0)
+
+	if readOnly {
+		options = append(options, "ro")
+	} else {
+		options = append(options, "rw")
+	}
+
+	diskMounter := &mount.SafeFormatAndMount{Interface: mounter, Exec: a.plugin.host.GetExec(a.plugin.GetPluginName())}
+
+	return diskMounter.FormatAndMount(devicePath, deviceMountPath, volSourceFSType, options)
+}

vendor/k8s.io/kubernetes/pkg/volume/flexvolume/attacher.go

@@ -0,0 +1,121 @@
+/*
+Copyright 2017 The Kubernetes Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package flexvolume
+
+import (
+	"time"
+
+	"github.com/golang/glog"
+	"k8s.io/api/core/v1"
+	"k8s.io/apimachinery/pkg/types"
+	"k8s.io/kubernetes/pkg/volume"
+)
+
+type flexVolumeAttacher struct {
+	plugin *flexVolumeAttachablePlugin
+}
+
+var _ volume.Attacher = &flexVolumeAttacher{}
+
+// Attach is part of the volume.Attacher interface
+func (a *flexVolumeAttacher) Attach(spec *volume.Spec, hostName types.NodeName) (string, error) {
+
+	call := a.plugin.NewDriverCall(attachCmd)
+	call.AppendSpec(spec, a.plugin.host, nil)
+	call.Append(string(hostName))
+
+	status, err := call.Run()
+	if isCmdNotSupportedErr(err) {
+		return (*attacherDefaults)(a).Attach(spec, hostName)
+	} else if err != nil {
+		return "", err
+	}
+	return status.DevicePath, err
+}
+
+// WaitForAttach is part of the volume.Attacher interface
+func (a *flexVolumeAttacher) WaitForAttach(spec *volume.Spec, devicePath string, _ *v1.Pod, timeout time.Duration) (string, error) {
+	call := a.plugin.NewDriverCallWithTimeout(waitForAttachCmd, timeout)
+	call.Append(devicePath)
+	call.AppendSpec(spec, a.plugin.host, nil)
+
+	status, err := call.Run()
+	if isCmdNotSupportedErr(err) {
+		return (*attacherDefaults)(a).WaitForAttach(spec, devicePath, timeout)
+	} else if err != nil {
+		return "", err
+	}
+	return status.DevicePath, nil
+}
+
+// GetDeviceMountPath is part of the volume.Attacher interface
+func (a *flexVolumeAttacher) GetDeviceMountPath(spec *volume.Spec) (string, error) {
+	return a.plugin.getDeviceMountPath(spec)
+}
+
+// MountDevice is part of the volume.Attacher interface
+func (a *flexVolumeAttacher) MountDevice(spec *volume.Spec, devicePath string, deviceMountPath string) error {
+	// Mount only once.
+	alreadyMounted, err := prepareForMount(a.plugin.host.GetMounter(a.plugin.GetPluginName()), deviceMountPath)
+	if err != nil {
+		return err
+	}
+	if alreadyMounted {
+		return nil
+	}
+
+	call := a.plugin.NewDriverCall(mountDeviceCmd)
+	call.Append(deviceMountPath)
+	call.Append(devicePath)
+	call.AppendSpec(spec, a.plugin.host, nil)
+
+	_, err = call.Run()
+	if isCmdNotSupportedErr(err) {
+		// Devicepath is empty if the plugin does not support attach calls. Ignore mountDevice calls if the
+		// plugin does not implement attach interface.
+		if devicePath != "" {
+			return (*attacherDefaults)(a).MountDevice(spec, devicePath, deviceMountPath, a.plugin.host.GetMounter(a.plugin.GetPluginName()))
+		} else {
+			return nil
+		}
+	}
+	return err
+}
+
+func (a *flexVolumeAttacher) VolumesAreAttached(specs []*volume.Spec, nodeName types.NodeName) (map[*volume.Spec]bool, error) {
+	volumesAttachedCheck := make(map[*volume.Spec]bool)
+	for _, spec := range specs {
+		volumesAttachedCheck[spec] = true
+
+		call := a.plugin.NewDriverCall(isAttached)
+		call.AppendSpec(spec, a.plugin.host, nil)
+		call.Append(string(nodeName))
+
+		status, err := call.Run()
+		if isCmdNotSupportedErr(err) {
+			return nil, nil
+		} else if err == nil {
+			if !status.Attached {
+				volumesAttachedCheck[spec] = false
+				glog.V(2).Infof("VolumesAreAttached: check volume (%q) is no longer attached", spec.Name())
+			}
+		} else {
+			return nil, err
+		}
+	}
+	return volumesAttachedCheck, nil
+}

vendor/k8s.io/kubernetes/pkg/volume/flexvolume/attacher_test.go

@@ -0,0 +1,76 @@
+/*
+Copyright 2017 The Kubernetes Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package flexvolume
+
+import (
+	"testing"
+	"time"
+
+	"k8s.io/api/core/v1"
+	"k8s.io/kubernetes/pkg/volume"
+)
+
+func TestAttach(t *testing.T) {
+	spec := fakeVolumeSpec()
+
+	plugin, _ := testPlugin()
+	plugin.runner = fakeRunner(
+		assertDriverCall(t, notSupportedOutput(), attachCmd,
+			specJson(plugin, spec, nil), "localhost"),
+	)
+
+	a, _ := plugin.NewAttacher()
+	a.Attach(spec, "localhost")
+}
+
+func TestWaitForAttach(t *testing.T) {
+	spec := fakeVolumeSpec()
+	var pod *v1.Pod
+	plugin, _ := testPlugin()
+	plugin.runner = fakeRunner(
+		assertDriverCall(t, notSupportedOutput(), waitForAttachCmd, "/dev/sdx",
+			specJson(plugin, spec, nil)),
+	)
+
+	a, _ := plugin.NewAttacher()
+	a.WaitForAttach(spec, "/dev/sdx", pod, 1*time.Second)
+}
+
+func TestMountDevice(t *testing.T) {
+	spec := fakeVolumeSpec()
+
+	plugin, rootDir := testPlugin()
+	plugin.runner = fakeRunner(
+		assertDriverCall(t, notSupportedOutput(), mountDeviceCmd, rootDir+"/mount-dir", "/dev/sdx",
+			specJson(plugin, spec, nil)),
+	)
+
+	a, _ := plugin.NewAttacher()
+	a.MountDevice(spec, "/dev/sdx", rootDir+"/mount-dir")
+}
+
+func TestIsVolumeAttached(t *testing.T) {
+	spec := fakeVolumeSpec()
+
+	plugin, _ := testPlugin()
+	plugin.runner = fakeRunner(
+		assertDriverCall(t, notSupportedOutput(), isAttached, specJson(plugin, spec, nil), "localhost"),
+	)
+	a, _ := plugin.NewAttacher()
+	specs := []*volume.Spec{spec}
+	a.VolumesAreAttached(specs, "localhost")
+}

vendor/k8s.io/kubernetes/pkg/volume/flexvolume/common_test.go

@@ -0,0 +1,142 @@
+/*
+Copyright 2017 The Kubernetes Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package flexvolume
+
+import (
+	"encoding/json"
+	"testing"
+
+	"k8s.io/api/core/v1"
+	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+	utiltesting "k8s.io/client-go/util/testing"
+	"k8s.io/kubernetes/pkg/volume"
+	volumetesting "k8s.io/kubernetes/pkg/volume/testing"
+	"k8s.io/utils/exec"
+	fakeexec "k8s.io/utils/exec/testing"
+)
+
+func testPlugin() (*flexVolumeAttachablePlugin, string) {
+	rootDir, err := utiltesting.MkTmpdir("flexvolume_test")
+	if err != nil {
+		panic("error creating temp dir: " + err.Error())
+	}
+	return &flexVolumeAttachablePlugin{
+		flexVolumePlugin: &flexVolumePlugin{
+			driverName:          "test",
+			execPath:            "/plugin",
+			host:                volumetesting.NewFakeVolumeHost(rootDir, nil, nil),
+			unsupportedCommands: []string{},
+		},
+	}, rootDir
+}
+
+func assertDriverCall(t *testing.T, output fakeexec.FakeCombinedOutputAction, expectedCommand string, expectedArgs ...string) fakeexec.FakeCommandAction {
+	return func(cmd string, args ...string) exec.Cmd {
+		if cmd != "/plugin/test" {
+			t.Errorf("Wrong executable called: got %v, expected %v", cmd, "/plugin/test")
+		}
+		if args[0] != expectedCommand {
+			t.Errorf("Wrong command called: got %v, expected %v", args[0], expectedCommand)
+		}
+		cmdArgs := args[1:]
+		if !sameArgs(cmdArgs, expectedArgs) {
+			t.Errorf("Wrong args for %s: got %v, expected %v", args[0], cmdArgs, expectedArgs)
+		}
+		return &fakeexec.FakeCmd{
+			Argv:                 args,
+			CombinedOutputScript: []fakeexec.FakeCombinedOutputAction{output},
+		}
+	}
+}
+
+func fakeRunner(fakeCommands ...fakeexec.FakeCommandAction) exec.Interface {
+	return &fakeexec.FakeExec{
+		CommandScript: fakeCommands,
+	}
+}
+
+func fakeResultOutput(result interface{}) fakeexec.FakeCombinedOutputAction {
+	return func() ([]byte, error) {
+		bytes, err := json.Marshal(result)
+		if err != nil {
+			panic("Unable to marshal result: " + err.Error())
+		}
+		return bytes, nil
+	}
+}
+
+func successOutput() fakeexec.FakeCombinedOutputAction {
+	return fakeResultOutput(&DriverStatus{StatusSuccess, "", "", "", true, nil})
+}
+
+func notSupportedOutput() fakeexec.FakeCombinedOutputAction {
+	return fakeResultOutput(&DriverStatus{StatusNotSupported, "", "", "", false, nil})
+}
+
+func sameArgs(args, expectedArgs []string) bool {
+	if len(args) != len(expectedArgs) {
+		return false
+	}
+	for i, v := range args {
+		if v != expectedArgs[i] {
+			return false
+		}
+	}
+	return true
+}
+
+func fakeVolumeSpec() *volume.Spec {
+	vol := &v1.Volume{
+		Name: "vol1",
+		VolumeSource: v1.VolumeSource{
+			FlexVolume: &v1.FlexVolumeSource{
+				Driver:   "kubernetes.io/fakeAttacher",
+				ReadOnly: false,
+			},
+		},
+	}
+	return volume.NewSpecFromVolume(vol)
+}
+
+func fakePersistentVolumeSpec() *volume.Spec {
+	vol := &v1.PersistentVolume{
+		ObjectMeta: metav1.ObjectMeta{
+			Name: "vol1",
+		},
+		Spec: v1.PersistentVolumeSpec{
+			PersistentVolumeSource: v1.PersistentVolumeSource{
+				FlexVolume: &v1.FlexPersistentVolumeSource{
+					Driver:   "kubernetes.io/fakeAttacher",
+					ReadOnly: false,
+				},
+			},
+		},
+	}
+	return volume.NewSpecFromPersistentVolume(vol, false)
+}
+
+func specJson(plugin *flexVolumeAttachablePlugin, spec *volume.Spec, extraOptions map[string]string) string {
+	o, err := NewOptionsForDriver(spec, plugin.host, extraOptions)
+	if err != nil {
+		panic("Failed to convert spec: " + err.Error())
+	}
+	bytes, err := json.Marshal(o)
+	if err != nil {
+		panic("Unable to marshal result: " + err.Error())
+	}
+	return string(bytes)
+}

vendor/k8s.io/kubernetes/pkg/volume/flexvolume/detacher-defaults.go

@@ -0,0 +1,45 @@
+/*
+Copyright 2017 The Kubernetes Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package flexvolume
+
+import (
+	"time"
+
+	"github.com/golang/glog"
+	"k8s.io/apimachinery/pkg/types"
+	"k8s.io/kubernetes/pkg/volume/util"
+)
+
+type detacherDefaults flexVolumeDetacher
+
+// Detach is part of the volume.Detacher interface.
+func (d *detacherDefaults) Detach(volumeName string, hostName types.NodeName) error {
+	glog.Warning(logPrefix(d.plugin.flexVolumePlugin), "using default Detach for volume ", volumeName, ", host ", hostName)
+	return nil
+}
+
+// WaitForDetach is part of the volume.Detacher interface.
+func (d *detacherDefaults) WaitForDetach(devicePath string, timeout time.Duration) error {
+	glog.Warning(logPrefix(d.plugin.flexVolumePlugin), "using default WaitForDetach for device ", devicePath)
+	return nil
+}
+
+// UnmountDevice is part of the volume.Detacher interface.
+func (d *detacherDefaults) UnmountDevice(deviceMountPath string) error {
+	glog.Warning(logPrefix(d.plugin.flexVolumePlugin), "using default UnmountDevice for device mount path ", deviceMountPath)
+	return util.UnmountPath(deviceMountPath, d.plugin.host.GetMounter(d.plugin.GetPluginName()))
+}

vendor/k8s.io/kubernetes/pkg/volume/flexvolume/detacher.go

@@ -0,0 +1,85 @@
+/*
+Copyright 2017 The Kubernetes Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package flexvolume
+
+import (
+	"fmt"
+	"os"
+
+	"github.com/golang/glog"
+	"k8s.io/apimachinery/pkg/types"
+	"k8s.io/kubernetes/pkg/volume"
+	"k8s.io/kubernetes/pkg/volume/util"
+)
+
+type flexVolumeDetacher struct {
+	plugin *flexVolumeAttachablePlugin
+}
+
+var _ volume.Detacher = &flexVolumeDetacher{}
+
+// Detach is part of the volume.Detacher interface.
+func (d *flexVolumeDetacher) Detach(volumeName string, hostName types.NodeName) error {
+
+	call := d.plugin.NewDriverCall(detachCmd)
+	call.Append(volumeName)
+	call.Append(string(hostName))
+
+	_, err := call.Run()
+	if isCmdNotSupportedErr(err) {
+		return (*detacherDefaults)(d).Detach(volumeName, hostName)
+	}
+	return err
+}
+
+// UnmountDevice is part of the volume.Detacher interface.
+func (d *flexVolumeDetacher) UnmountDevice(deviceMountPath string) error {
+
+	if pathExists, pathErr := util.PathExists(deviceMountPath); pathErr != nil {
+		return fmt.Errorf("Error checking if path exists: %v", pathErr)
+	} else if !pathExists {
+		glog.Warningf("Warning: Unmount skipped because path does not exist: %v", deviceMountPath)
+		return nil
+	}
+
+	notmnt, err := isNotMounted(d.plugin.host.GetMounter(d.plugin.GetPluginName()), deviceMountPath)
+	if err != nil {
+		return err
+	}
+	if notmnt {
+		glog.Warningf("Warning: Path: %v already unmounted", deviceMountPath)
+	} else {
+		call := d.plugin.NewDriverCall(unmountDeviceCmd)
+		call.Append(deviceMountPath)
+
+		_, err := call.Run()
+		if isCmdNotSupportedErr(err) {
+			err = (*detacherDefaults)(d).UnmountDevice(deviceMountPath)
+		}
+		if err != nil {
+			return err
+		}
+	}
+
+	// Flexvolume driver may remove the directory. Ignore if it does.
+	if pathExists, pathErr := util.PathExists(deviceMountPath); pathErr != nil {
+		return fmt.Errorf("Error checking if path exists: %v", pathErr)
+	} else if !pathExists {
+		return nil
+	}
+	return os.Remove(deviceMountPath)
+}

vendor/k8s.io/kubernetes/pkg/volume/flexvolume/detacher_test.go

@@ -0,0 +1,43 @@
+/*
+Copyright 2017 The Kubernetes Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package flexvolume
+
+import (
+	"testing"
+)
+
+func TestDetach(t *testing.T) {
+	plugin, _ := testPlugin()
+	plugin.runner = fakeRunner(
+		assertDriverCall(t, notSupportedOutput(), detachCmd,
+			"sdx", "localhost"),
+	)
+
+	d, _ := plugin.NewDetacher()
+	d.Detach("sdx", "localhost")
+}
+
+func TestUnmountDevice(t *testing.T) {
+	plugin, rootDir := testPlugin()
+	plugin.runner = fakeRunner(
+		assertDriverCall(t, notSupportedOutput(), unmountDeviceCmd,
+			rootDir+"/mount-dir"),
+	)
+
+	d, _ := plugin.NewDetacher()
+	d.UnmountDevice(rootDir + "/mount-dir")
+}

vendor/k8s.io/kubernetes/pkg/volume/flexvolume/driver-call.go

@@ -0,0 +1,263 @@
+/*
+Copyright 2017 The Kubernetes Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package flexvolume
+
+import (
+	"encoding/json"
+	"errors"
+	"fmt"
+	"time"
+
+	"github.com/golang/glog"
+
+	"k8s.io/kubernetes/pkg/volume"
+)
+
+const (
+	// Driver calls
+	initCmd          = "init"
+	getVolumeNameCmd = "getvolumename"
+
+	isAttached = "isattached"
+
+	attachCmd        = "attach"
+	waitForAttachCmd = "waitforattach"
+	mountDeviceCmd   = "mountdevice"
+
+	detachCmd        = "detach"
+	unmountDeviceCmd = "unmountdevice"
+
+	mountCmd   = "mount"
+	unmountCmd = "unmount"
+
+	// Option keys
+	optionFSType         = "kubernetes.io/fsType"
+	optionReadWrite      = "kubernetes.io/readwrite"
+	optionKeySecret      = "kubernetes.io/secret"
+	optionFSGroup        = "kubernetes.io/fsGroup"
+	optionMountsDir      = "kubernetes.io/mountsDir"
+	optionPVorVolumeName = "kubernetes.io/pvOrVolumeName"
+
+	optionKeyPodName      = "kubernetes.io/pod.name"
+	optionKeyPodNamespace = "kubernetes.io/pod.namespace"
+	optionKeyPodUID       = "kubernetes.io/pod.uid"
+
+	optionKeyServiceAccountName = "kubernetes.io/serviceAccount.name"
+)
+
+const (
+	// StatusSuccess represents the successful completion of command.
+	StatusSuccess = "Success"
+	// StatusNotSupported represents that the command is not supported.
+	StatusNotSupported = "Not supported"
+)
+
+var (
+	TimeoutError = fmt.Errorf("Timeout")
+)
+
+// DriverCall implements the basic contract between FlexVolume and its driver.
+// The caller is responsible for providing the required args.
+type DriverCall struct {
+	Command string
+	Timeout time.Duration
+	plugin  *flexVolumePlugin
+	args    []string
+}
+
+func (plugin *flexVolumePlugin) NewDriverCall(command string) *DriverCall {
+	return plugin.NewDriverCallWithTimeout(command, 0)
+}
+
+func (plugin *flexVolumePlugin) NewDriverCallWithTimeout(command string, timeout time.Duration) *DriverCall {
+	return &DriverCall{
+		Command: command,
+		Timeout: timeout,
+		plugin:  plugin,
+		args:    []string{command},
+	}
+}
+
+func (dc *DriverCall) Append(arg string) {
+	dc.args = append(dc.args, arg)
+}
+
+func (dc *DriverCall) AppendSpec(spec *volume.Spec, host volume.VolumeHost, extraOptions map[string]string) error {
+	optionsForDriver, err := NewOptionsForDriver(spec, host, extraOptions)
+	if err != nil {
+		return err
+	}
+
+	jsonBytes, err := json.Marshal(optionsForDriver)
+	if err != nil {
+		return fmt.Errorf("Failed to marshal spec, error: %s", err.Error())
+	}
+
+	dc.Append(string(jsonBytes))
+	return nil
+}
+
+func (dc *DriverCall) Run() (*DriverStatus, error) {
+	if dc.plugin.isUnsupported(dc.Command) {
+		return nil, errors.New(StatusNotSupported)
+	}
+	execPath := dc.plugin.getExecutable()
+
+	cmd := dc.plugin.runner.Command(execPath, dc.args...)
+
+	timeout := false
+	if dc.Timeout > 0 {
+		timer := time.AfterFunc(dc.Timeout, func() {
+			timeout = true
+			cmd.Stop()
+		})
+		defer timer.Stop()
+	}
+
+	output, execErr := cmd.CombinedOutput()
+	if execErr != nil {
+		if timeout {
+			return nil, TimeoutError
+		}
+		_, err := handleCmdResponse(dc.Command, output)
+		if err == nil {
+			glog.Errorf("FlexVolume: driver bug: %s: exec error (%s) but no error in response.", execPath, execErr)
+			return nil, execErr
+		}
+		if isCmdNotSupportedErr(err) {
+			dc.plugin.unsupported(dc.Command)
+		} else {
+			glog.Warningf("FlexVolume: driver call failed: executable: %s, args: %s, error: %s, output: %q", execPath, dc.args, execErr.Error(), output)
+		}
+		return nil, err
+	}
+
+	status, err := handleCmdResponse(dc.Command, output)
+	if err != nil {
+		if isCmdNotSupportedErr(err) {
+			dc.plugin.unsupported(dc.Command)
+		}
+		return nil, err
+	}
+
+	return status, nil
+}
+
+// OptionsForDriver represents the spec given to the driver.
+type OptionsForDriver map[string]string
+
+func NewOptionsForDriver(spec *volume.Spec, host volume.VolumeHost, extraOptions map[string]string) (OptionsForDriver, error) {
+
+	volSourceFSType, err := getFSType(spec)
+	if err != nil {
+		return nil, err
+	}
+
+	readOnly, err := getReadOnly(spec)
+	if err != nil {
+		return nil, err
+	}
+
+	volSourceOptions, err := getOptions(spec)
+	if err != nil {
+		return nil, err
+	}
+
+	options := map[string]string{}
+
+	options[optionFSType] = volSourceFSType
+
+	if readOnly {
+		options[optionReadWrite] = "ro"
+	} else {
+		options[optionReadWrite] = "rw"
+	}
+
+	options[optionPVorVolumeName] = spec.Name()
+
+	for key, value := range extraOptions {
+		options[key] = value
+	}
+
+	for key, value := range volSourceOptions {
+		options[key] = value
+	}
+
+	return OptionsForDriver(options), nil
+}
+
+// DriverStatus represents the return value of the driver callout.
+type DriverStatus struct {
+	// Status of the callout. One of "Success", "Failure" or "Not supported".
+	Status string `json:"status"`
+	// Reason for success/failure.
+	Message string `json:"message,omitempty"`
+	// Path to the device attached. This field is valid only for attach calls.
+	// ie: /dev/sdx
+	DevicePath string `json:"device,omitempty"`
+	// Cluster wide unique name of the volume.
+	VolumeName string `json:"volumeName,omitempty"`
+	// Represents volume is attached on the node
+	Attached bool `json:"attached,omitempty"`
+	// Returns capabilities of the driver.
+	// By default we assume all the capabilities are supported.
+	// If the plugin does not support a capability, it can return false for that capability.
+	Capabilities *DriverCapabilities `json:",omitempty"`
+}
+
+type DriverCapabilities struct {
+	Attach         bool `json:"attach"`
+	SELinuxRelabel bool `json:"selinuxRelabel"`
+}
+
+func defaultCapabilities() *DriverCapabilities {
+	return &DriverCapabilities{
+		Attach:         true,
+		SELinuxRelabel: true,
+	}
+}
+
+// isCmdNotSupportedErr checks if the error corresponds to command not supported by
+// driver.
+func isCmdNotSupportedErr(err error) bool {
+	if err != nil && err.Error() == StatusNotSupported {
+		return true
+	}
+
+	return false
+}
+
+// handleCmdResponse processes the command output and returns the appropriate
+// error code or message.
+func handleCmdResponse(cmd string, output []byte) (*DriverStatus, error) {
+	status := DriverStatus{
+		Capabilities: defaultCapabilities(),
+	}
+	if err := json.Unmarshal(output, &status); err != nil {
+		glog.Errorf("Failed to unmarshal output for command: %s, output: %q, error: %s", cmd, string(output), err.Error())
+		return nil, err
+	} else if status.Status == StatusNotSupported {
+		glog.V(5).Infof("%s command is not supported by the driver", cmd)
+		return nil, errors.New(status.Status)
+	} else if status.Status != StatusSuccess {
+		errMsg := fmt.Sprintf("%s command failed, status: %s, reason: %s", cmd, status.Status, status.Message)
+		glog.Errorf(errMsg)
+		return nil, fmt.Errorf("%s", errMsg)
+	}
+
+	return &status, nil
+}

vendor/k8s.io/kubernetes/pkg/volume/flexvolume/driver-call_test.go

@@ -0,0 +1,32 @@
+/*
+Copyright 2017 The Kubernetes Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package flexvolume
+
+import (
+	"testing"
+)
+
+func TestHandleResponseDefaults(t *testing.T) {
+	ds, err := handleCmdResponse("test", []byte(`{"status": "Success"}`))
+	if err != nil {
+		t.Error("error: ", err)
+	}
+
+	if *ds.Capabilities != *defaultCapabilities() {
+		t.Error("wrong default capabilities: ", *ds.Capabilities)
+	}
+}

vendor/k8s.io/kubernetes/pkg/volume/flexvolume/fake_watcher.go

@@ -0,0 +1,53 @@
+/*
+Copyright 2017 The Kubernetes Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package flexvolume
+
+import (
+	"github.com/fsnotify/fsnotify"
+	utilfs "k8s.io/kubernetes/pkg/util/filesystem"
+)
+
+// Mock filesystem watcher
+type fakeWatcher struct {
+	watches      []string // List of watches added by the prober, ordered from least recent to most recent.
+	eventHandler utilfs.FSEventHandler
+}
+
+var _ utilfs.FSWatcher = &fakeWatcher{}
+
+func NewFakeWatcher() *fakeWatcher {
+	return &fakeWatcher{
+		watches: nil,
+	}
+}
+
+func (w *fakeWatcher) Init(eventHandler utilfs.FSEventHandler, _ utilfs.FSErrorHandler) error {
+	w.eventHandler = eventHandler
+	return nil
+}
+
+func (w *fakeWatcher) Run() { /* no-op */ }
+
+func (w *fakeWatcher) AddWatch(path string) error {
+	w.watches = append(w.watches, path)
+	return nil
+}
+
+// Triggers a mock filesystem event.
+func (w *fakeWatcher) TriggerEvent(op fsnotify.Op, filename string) {
+	w.eventHandler(fsnotify.Event{Op: op, Name: filename})
+}

vendor/k8s.io/kubernetes/pkg/volume/flexvolume/flexvolume_test.go

@@ -0,0 +1,214 @@
+/*
+Copyright 2015 The Kubernetes Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package flexvolume
+
+import (
+	"bytes"
+	"fmt"
+	"os"
+	"path"
+	"testing"
+	"text/template"
+
+	"k8s.io/api/core/v1"
+	utiltesting "k8s.io/client-go/util/testing"
+	"k8s.io/kubernetes/pkg/volume"
+	volumetest "k8s.io/kubernetes/pkg/volume/testing"
+)
+
+const execScriptTempl1 = `#!/usr/bin/env bash
+if [ "$1" == "init" -a $# -eq 1 ]; then
+  echo -n '{
+    "status": "Success"
+  }'
+  exit 0
+fi
+
+PATH=$2
+if [ "$1" == "attach" -a $# -eq 2 ]; then
+  echo -n '{
+    "device": "{{.DevicePath}}",
+    "status": "Success"
+  }'
+  exit 0
+elif [ "$1" == "detach" -a $# -eq 2 ]; then
+  echo -n '{
+    "status": "Success"
+  }'
+  exit 0
+elif [ "$1" == "getvolumename" -a $# -eq 4 ]; then
+  echo -n '{
+    "status": "Success",
+    "volume": "fakevolume"
+  }'
+  exit 0
+elif [ "$1" == "isattached" -a $# -eq 2 ]; then
+  echo -n '{
+    "status": "Success",
+    "attached": true
+  }'
+  exit 0
+fi
+
+echo -n '{
+  "status": "Not supported"
+}'
+exit 1
+
+# Direct the arguments to a file to be tested against later
+echo -n $@ &> {{.OutputFile}}
+`
+
+const execScriptTempl2 = `#!/usr/bin/env bash
+if [ "$1" == "init" -a $# -eq 1 ]; then
+  echo -n '{
+    "status": "Success"
+  }'
+  exit 0
+fi
+
+if [ "$1" == "getvolumename" -a $# -eq 2 ]; then
+  echo -n '{
+    "status": "Success",
+    "volumeName": "fakevolume"
+  }'
+  exit 0
+elif [ "$1" == "mount" -a $# -eq 4 ]; then
+  PATH=$2
+  /bin/mkdir -p $PATH
+  if [ $? -ne 0 ]; then
+    echo -n '{
+      "status": "Failure",
+      "reason": "Failed to create $PATH"
+    }'
+    exit 1
+  fi
+  echo -n '{
+    "status": "Success"
+  }'
+  exit 0
+elif [ "$1" == "unmount" -a $# -eq 2 ]; then
+  PATH=$2
+  /bin/rm -r $PATH
+  if [ $? -ne 0 ]; then
+    echo -n '{
+      "status": "Failure",
+      "reason": "Failed to cleanup $PATH"
+    }'
+    exit 1
+  fi
+  echo -n '{
+    "status": "Success"
+  }'
+  exit 0
+fi
+
+echo -n '{
+  "status": "Not Supported"
+}'
+exit 1
+
+# Direct the arguments to a file to be tested against later
+echo -n $@ &> {{.OutputFile}}
+`
+
+func installPluginUnderTest(t *testing.T, vendorName, plugName, tmpDir string, execScriptTempl string, execTemplateData *map[string]interface{}) {
+	vendoredName := plugName
+	if vendorName != "" {
+		vendoredName = fmt.Sprintf("%s~%s", vendorName, plugName)
+	}
+	pluginDir := path.Join(tmpDir, vendoredName)
+	err := os.MkdirAll(pluginDir, 0777)
+	if err != nil {
+		t.Errorf("Failed to create plugin: %v", err)
+	}
+	pluginExec := path.Join(pluginDir, plugName)
+	f, err := os.Create(pluginExec)
+	if err != nil {
+		t.Errorf("Failed to install plugin")
+	}
+	err = f.Chmod(0777)
+	if err != nil {
+		t.Errorf("Failed to set exec perms on plugin")
+	}
+	if execTemplateData == nil {
+		execTemplateData = &map[string]interface{}{
+			"DevicePath": "/dev/sdx",
+			"OutputFile": path.Join(pluginDir, plugName+".out"),
+		}
+	}
+
+	tObj := template.Must(template.New("test").Parse(execScriptTempl))
+	buf := &bytes.Buffer{}
+	if err := tObj.Execute(buf, *execTemplateData); err != nil {
+		t.Errorf("Error in executing script template - %v", err)
+	}
+	execScript := buf.String()
+	_, err = f.WriteString(execScript)
+	if err != nil {
+		t.Errorf("Failed to write plugin exec")
+	}
+	f.Close()
+}
+
+func TestCanSupport(t *testing.T) {
+	tmpDir, err := utiltesting.MkTmpdir("flexvolume_test")
+	if err != nil {
+		t.Fatalf("error creating temp dir: %v", err)
+	}
+	defer os.RemoveAll(tmpDir)
+
+	plugMgr := volume.VolumePluginMgr{}
+	installPluginUnderTest(t, "kubernetes.io", "fakeAttacher", tmpDir, execScriptTempl1, nil)
+	plugMgr.InitPlugins(nil, GetDynamicPluginProber(tmpDir), volumetest.NewFakeVolumeHost("fake", nil, nil))
+	plugin, err := plugMgr.FindPluginByName("flexvolume-kubernetes.io/fakeAttacher")
+	if err != nil {
+		t.Fatalf("Can't find the plugin by name")
+	}
+	if plugin.GetPluginName() != "flexvolume-kubernetes.io/fakeAttacher" {
+		t.Errorf("Wrong name: %s", plugin.GetPluginName())
+	}
+	if !plugin.CanSupport(&volume.Spec{Volume: &v1.Volume{VolumeSource: v1.VolumeSource{FlexVolume: &v1.FlexVolumeSource{Driver: "kubernetes.io/fakeAttacher"}}}}) {
+		t.Errorf("Expected true")
+	}
+	if !plugin.CanSupport(&volume.Spec{PersistentVolume: &v1.PersistentVolume{Spec: v1.PersistentVolumeSpec{PersistentVolumeSource: v1.PersistentVolumeSource{FlexVolume: &v1.FlexPersistentVolumeSource{Driver: "kubernetes.io/fakeAttacher"}}}}}) {
+		t.Errorf("Expected true")
+	}
+	if plugin.CanSupport(&volume.Spec{Volume: &v1.Volume{VolumeSource: v1.VolumeSource{}}}) {
+		t.Errorf("Expected false")
+	}
+}
+
+func TestGetAccessModes(t *testing.T) {
+	tmpDir, err := utiltesting.MkTmpdir("flexvolume_test")
+	if err != nil {
+		t.Fatalf("error creating temp dir: %v", err)
+	}
+	defer os.RemoveAll(tmpDir)
+
+	plugMgr := volume.VolumePluginMgr{}
+	installPluginUnderTest(t, "kubernetes.io", "fakeAttacher", tmpDir, execScriptTempl1, nil)
+	plugMgr.InitPlugins(nil, GetDynamicPluginProber(tmpDir), volumetest.NewFakeVolumeHost(tmpDir, nil, nil))
+
+	plugin, err := plugMgr.FindPersistentPluginByName("flexvolume-kubernetes.io/fakeAttacher")
+	if err != nil {
+		t.Fatalf("Can't find the plugin by name")
+	}
+	if !volumetest.ContainsAccessMode(plugin.GetAccessModes(), v1.ReadWriteOnce) || !volumetest.ContainsAccessMode(plugin.GetAccessModes(), v1.ReadOnlyMany) {
+		t.Errorf("Expected two AccessModeTypes:  %s and %s", v1.ReadWriteOnce, v1.ReadOnlyMany)
+	}
+}

vendor/k8s.io/kubernetes/pkg/volume/flexvolume/mounter-defaults.go

@@ -0,0 +1,56 @@
+/*
+Copyright 2017 The Kubernetes Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package flexvolume
+
+import (
+	"github.com/golang/glog"
+
+	"k8s.io/kubernetes/pkg/volume"
+)
+
+type mounterDefaults flexVolumeMounter
+
+// SetUpAt is part of the volume.Mounter interface.
+// This implementation relies on the attacher's device mount path and does a bind mount to dir.
+func (f *mounterDefaults) SetUpAt(dir string, fsGroup *int64) error {
+	glog.Warning(logPrefix(f.plugin), "using default SetUpAt to ", dir)
+
+	src, err := f.plugin.getDeviceMountPath(f.spec)
+	if err != nil {
+		return err
+	}
+
+	if err := doMount(f.mounter, src, dir, "auto", []string{"bind"}); err != nil {
+		return err
+	}
+
+	return nil
+}
+
+// Returns the default volume attributes.
+func (f *mounterDefaults) GetAttributes() volume.Attributes {
+	glog.V(5).Infof(logPrefix(f.plugin), "using default GetAttributes")
+	return volume.Attributes{
+		ReadOnly:        f.readOnly,
+		Managed:         !f.readOnly,
+		SupportsSELinux: f.flexVolume.plugin.capabilities.SELinuxRelabel,
+	}
+}
+
+func (f *mounterDefaults) CanMount() error {
+	return nil
+}

vendor/k8s.io/kubernetes/pkg/volume/flexvolume/mounter.go

@@ -0,0 +1,110 @@
+/*
+Copyright 2017 The Kubernetes Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package flexvolume
+
+import (
+	"os"
+	"strconv"
+
+	"k8s.io/kubernetes/pkg/volume"
+	"k8s.io/utils/exec"
+)
+
+// FlexVolumeMounter is the disk that will be exposed by this plugin.
+type flexVolumeMounter struct {
+	*flexVolume
+	// Runner used to setup the volume.
+	runner exec.Interface
+	// the considered volume spec
+	spec     *volume.Spec
+	readOnly bool
+	volume.MetricsNil
+}
+
+var _ volume.Mounter = &flexVolumeMounter{}
+
+// Mounter interface
+
+// SetUp creates new directory.
+func (f *flexVolumeMounter) SetUp(fsGroup *int64) error {
+	return f.SetUpAt(f.GetPath(), fsGroup)
+}
+
+// SetUpAt creates new directory.
+func (f *flexVolumeMounter) SetUpAt(dir string, fsGroup *int64) error {
+	// Mount only once.
+	alreadyMounted, err := prepareForMount(f.mounter, dir)
+	if err != nil {
+		return err
+	}
+	if alreadyMounted {
+		return nil
+	}
+
+	call := f.plugin.NewDriverCall(mountCmd)
+
+	// Interface parameters
+	call.Append(dir)
+
+	extraOptions := make(map[string]string)
+
+	// pod metadata
+	extraOptions[optionKeyPodName] = f.podName
+	extraOptions[optionKeyPodNamespace] = f.podNamespace
+	extraOptions[optionKeyPodUID] = string(f.podUID)
+	// service account metadata
+	extraOptions[optionKeyServiceAccountName] = f.podServiceAccountName
+
+	// Extract secret and pass it as options.
+	if err := addSecretsToOptions(extraOptions, f.spec, f.podNamespace, f.driverName, f.plugin.host); err != nil {
+		os.Remove(dir)
+		return err
+	}
+
+	// Implicit parameters
+	if fsGroup != nil {
+		extraOptions[optionFSGroup] = strconv.FormatInt(int64(*fsGroup), 10)
+	}
+
+	call.AppendSpec(f.spec, f.plugin.host, extraOptions)
+
+	_, err = call.Run()
+	if isCmdNotSupportedErr(err) {
+		err = (*mounterDefaults)(f).SetUpAt(dir, fsGroup)
+	}
+
+	if err != nil {
+		os.Remove(dir)
+		return err
+	}
+
+	if !f.readOnly {
+		volume.SetVolumeOwnership(f, fsGroup)
+	}
+
+	return nil
+}
+
+// GetAttributes get the flex volume attributes. The attributes will be queried
+// using plugin callout after we finalize the callout syntax.
+func (f *flexVolumeMounter) GetAttributes() volume.Attributes {
+	return (*mounterDefaults)(f).GetAttributes()
+}
+
+func (f *flexVolumeMounter) CanMount() error {
+	return nil
+}

vendor/k8s.io/kubernetes/pkg/volume/flexvolume/mounter_test.go

@@ -0,0 +1,72 @@
+/*
+Copyright 2017 The Kubernetes Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package flexvolume
+
+import (
+	"testing"
+
+	"k8s.io/api/core/v1"
+	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+	"k8s.io/apimachinery/pkg/types"
+	"k8s.io/kubernetes/pkg/util/mount"
+)
+
+func TestSetUpAt(t *testing.T) {
+	spec := fakeVolumeSpec()
+	pod := &v1.Pod{
+		ObjectMeta: metav1.ObjectMeta{
+			Name:      "my-pod",
+			Namespace: "my-ns",
+			UID:       types.UID("my-uid"),
+		},
+		Spec: v1.PodSpec{
+			ServiceAccountName: "my-sa",
+		},
+	}
+	mounter := &mount.FakeMounter{}
+
+	plugin, rootDir := testPlugin()
+	plugin.unsupportedCommands = []string{"unsupportedCmd"}
+	plugin.runner = fakeRunner(
+		// first call without fsGroup
+		assertDriverCall(t, successOutput(), mountCmd, rootDir+"/mount-dir",
+			specJson(plugin, spec, map[string]string{
+				optionKeyPodName:            "my-pod",
+				optionKeyPodNamespace:       "my-ns",
+				optionKeyPodUID:             "my-uid",
+				optionKeyServiceAccountName: "my-sa",
+			})),
+
+		// second test has fsGroup
+		assertDriverCall(t, notSupportedOutput(), mountCmd, rootDir+"/mount-dir",
+			specJson(plugin, spec, map[string]string{
+				optionFSGroup:               "42",
+				optionKeyPodName:            "my-pod",
+				optionKeyPodNamespace:       "my-ns",
+				optionKeyPodUID:             "my-uid",
+				optionKeyServiceAccountName: "my-sa",
+			})),
+		assertDriverCall(t, fakeVolumeNameOutput("sdx"), getVolumeNameCmd,
+			specJson(plugin, spec, nil)),
+	)
+
+	m, _ := plugin.newMounterInternal(spec, pod, mounter, plugin.runner)
+	m.SetUpAt(rootDir+"/mount-dir", nil)
+
+	fsGroup := int64(42)
+	m.SetUpAt(rootDir+"/mount-dir", &fsGroup)
+}

vendor/k8s.io/kubernetes/pkg/volume/flexvolume/plugin-defaults.go

@@ -0,0 +1,34 @@
+/*
+Copyright 2017 The Kubernetes Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package flexvolume
+
+import (
+	"github.com/golang/glog"
+
+	"k8s.io/kubernetes/pkg/volume"
+)
+
+type pluginDefaults flexVolumePlugin
+
+func logPrefix(plugin *flexVolumePlugin) string {
+	return "flexVolume driver " + plugin.driverName + ": "
+}
+
+func (plugin *pluginDefaults) GetVolumeName(spec *volume.Spec) (string, error) {
+	glog.Warning(logPrefix((*flexVolumePlugin)(plugin)), "using default GetVolumeName for volume ", spec.Name())
+	return spec.Name(), nil
+}

vendor/k8s.io/kubernetes/pkg/volume/flexvolume/plugin.go

@@ -0,0 +1,279 @@
+/*
+Copyright 2017 The Kubernetes Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package flexvolume
+
+import (
+	"fmt"
+	"path"
+	"runtime"
+	"strings"
+	"sync"
+
+	"github.com/golang/glog"
+
+	api "k8s.io/api/core/v1"
+	"k8s.io/apimachinery/pkg/types"
+	"k8s.io/kubernetes/pkg/util/mount"
+	utilstrings "k8s.io/kubernetes/pkg/util/strings"
+	"k8s.io/kubernetes/pkg/volume"
+	"k8s.io/kubernetes/pkg/volume/util"
+	"k8s.io/utils/exec"
+)
+
+const (
+	flexVolumePluginName       = "kubernetes.io/flexvolume"
+	flexVolumePluginNamePrefix = "flexvolume-"
+)
+
+// FlexVolumePlugin object.
+type flexVolumePlugin struct {
+	driverName string
+	execPath   string
+	host       volume.VolumeHost
+	runner     exec.Interface
+
+	sync.Mutex
+	unsupportedCommands []string
+	capabilities        DriverCapabilities
+}
+
+type flexVolumeAttachablePlugin struct {
+	*flexVolumePlugin
+}
+
+var _ volume.AttachableVolumePlugin = &flexVolumeAttachablePlugin{}
+var _ volume.PersistentVolumePlugin = &flexVolumePlugin{}
+
+type PluginFactory interface {
+	NewFlexVolumePlugin(pluginDir, driverName string) (volume.VolumePlugin, error)
+}
+
+type pluginFactory struct{}
+
+func (pluginFactory) NewFlexVolumePlugin(pluginDir, name string) (volume.VolumePlugin, error) {
+	execPath := path.Join(pluginDir, name)
+
+	driverName := utilstrings.UnescapePluginName(name)
+
+	flexPlugin := &flexVolumePlugin{
+		driverName:          driverName,
+		execPath:            execPath,
+		runner:              exec.New(),
+		unsupportedCommands: []string{},
+	}
+
+	// Initialize the plugin and probe the capabilities
+	call := flexPlugin.NewDriverCall(initCmd)
+	ds, err := call.Run()
+	if err != nil {
+		return nil, err
+	}
+	flexPlugin.capabilities = *ds.Capabilities
+
+	if flexPlugin.capabilities.Attach {
+		// Plugin supports attach/detach, so return flexVolumeAttachablePlugin
+		return &flexVolumeAttachablePlugin{flexVolumePlugin: flexPlugin}, nil
+	} else {
+		return flexPlugin, nil
+	}
+}
+
+// Init is part of the volume.VolumePlugin interface.
+func (plugin *flexVolumePlugin) Init(host volume.VolumeHost) error {
+	plugin.host = host
+	// Hardwired 'success' as any errors from calling init() will be caught by NewFlexVolumePlugin()
+	return nil
+}
+
+func (plugin *flexVolumePlugin) getExecutable() string {
+	parts := strings.Split(plugin.driverName, "/")
+	execName := parts[len(parts)-1]
+	execPath := path.Join(plugin.execPath, execName)
+	if runtime.GOOS == "windows" {
+		execPath = util.GetWindowsPath(execPath)
+	}
+	return execPath
+}
+
+// Name is part of the volume.VolumePlugin interface.
+func (plugin *flexVolumePlugin) GetPluginName() string {
+	return flexVolumePluginNamePrefix + plugin.driverName
+}
+
+// GetVolumeName is part of the volume.VolumePlugin interface.
+func (plugin *flexVolumePlugin) GetVolumeName(spec *volume.Spec) (string, error) {
+	call := plugin.NewDriverCall(getVolumeNameCmd)
+	call.AppendSpec(spec, plugin.host, nil)
+
+	_, err := call.Run()
+	if isCmdNotSupportedErr(err) {
+		return (*pluginDefaults)(plugin).GetVolumeName(spec)
+	} else if err != nil {
+		return "", err
+	}
+
+	name, err := (*pluginDefaults)(plugin).GetVolumeName(spec)
+	if err != nil {
+		return "", err
+	}
+
+	glog.Warning(logPrefix(plugin), "GetVolumeName is not supported yet. Defaulting to PV or volume name: ", name)
+
+	return name, nil
+}
+
+// CanSupport is part of the volume.VolumePlugin interface.
+func (plugin *flexVolumePlugin) CanSupport(spec *volume.Spec) bool {
+	sourceDriver, err := getDriver(spec)
+	if err != nil {
+		return false
+	}
+	return sourceDriver == plugin.driverName
+}
+
+// RequiresRemount is part of the volume.VolumePlugin interface.
+func (plugin *flexVolumePlugin) RequiresRemount() bool {
+	return false
+}
+
+// GetAccessModes gets the allowed access modes for this plugin.
+func (plugin *flexVolumePlugin) GetAccessModes() []api.PersistentVolumeAccessMode {
+	return []api.PersistentVolumeAccessMode{
+		api.ReadWriteOnce,
+		api.ReadOnlyMany,
+	}
+}
+
+// NewMounter is part of the volume.VolumePlugin interface.
+func (plugin *flexVolumePlugin) NewMounter(spec *volume.Spec, pod *api.Pod, _ volume.VolumeOptions) (volume.Mounter, error) {
+	return plugin.newMounterInternal(spec, pod, plugin.host.GetMounter(plugin.GetPluginName()), plugin.runner)
+}
+
+// newMounterInternal is the internal mounter routine to build the volume.
+func (plugin *flexVolumePlugin) newMounterInternal(spec *volume.Spec, pod *api.Pod, mounter mount.Interface, runner exec.Interface) (volume.Mounter, error) {
+	sourceDriver, err := getDriver(spec)
+	if err != nil {
+		return nil, err
+	}
+
+	readOnly, err := getReadOnly(spec)
+	if err != nil {
+		return nil, err
+	}
+
+	return &flexVolumeMounter{
+		flexVolume: &flexVolume{
+			driverName:            sourceDriver,
+			execPath:              plugin.getExecutable(),
+			mounter:               mounter,
+			plugin:                plugin,
+			podName:               pod.Name,
+			podUID:                pod.UID,
+			podNamespace:          pod.Namespace,
+			podServiceAccountName: pod.Spec.ServiceAccountName,
+			volName:               spec.Name(),
+		},
+		runner:   runner,
+		spec:     spec,
+		readOnly: readOnly,
+	}, nil
+}
+
+// NewUnmounter is part of the volume.VolumePlugin interface.
+func (plugin *flexVolumePlugin) NewUnmounter(volName string, podUID types.UID) (volume.Unmounter, error) {
+	return plugin.newUnmounterInternal(volName, podUID, plugin.host.GetMounter(plugin.GetPluginName()), plugin.runner)
+}
+
+// newUnmounterInternal is the internal unmounter routine to clean the volume.
+func (plugin *flexVolumePlugin) newUnmounterInternal(volName string, podUID types.UID, mounter mount.Interface, runner exec.Interface) (volume.Unmounter, error) {
+	return &flexVolumeUnmounter{
+		flexVolume: &flexVolume{
+			driverName: plugin.driverName,
+			execPath:   plugin.getExecutable(),
+			mounter:    mounter,
+			plugin:     plugin,
+			podUID:     podUID,
+			volName:    volName,
+		},
+		runner: runner,
+	}, nil
+}
+
+// NewAttacher is part of the volume.AttachableVolumePlugin interface.
+func (plugin *flexVolumeAttachablePlugin) NewAttacher() (volume.Attacher, error) {
+	return &flexVolumeAttacher{plugin}, nil
+}
+
+// NewDetacher is part of the volume.AttachableVolumePlugin interface.
+func (plugin *flexVolumeAttachablePlugin) NewDetacher() (volume.Detacher, error) {
+	return &flexVolumeDetacher{plugin}, nil
+}
+
+// ConstructVolumeSpec is part of the volume.AttachableVolumePlugin interface.
+func (plugin *flexVolumePlugin) ConstructVolumeSpec(volumeName, mountPath string) (*volume.Spec, error) {
+	flexVolume := &api.Volume{
+		Name: volumeName,
+		VolumeSource: api.VolumeSource{
+			FlexVolume: &api.FlexVolumeSource{
+				Driver: plugin.driverName,
+			},
+		},
+	}
+	return volume.NewSpecFromVolume(flexVolume), nil
+}
+
+func (plugin *flexVolumePlugin) SupportsMountOption() bool {
+	return false
+}
+
+// Mark the given commands as unsupported.
+func (plugin *flexVolumePlugin) unsupported(commands ...string) {
+	plugin.Lock()
+	defer plugin.Unlock()
+	plugin.unsupportedCommands = append(plugin.unsupportedCommands, commands...)
+}
+
+func (plugin *flexVolumePlugin) SupportsBulkVolumeVerification() bool {
+	return false
+}
+
+// Returns true iff the given command is known to be unsupported.
+func (plugin *flexVolumePlugin) isUnsupported(command string) bool {
+	plugin.Lock()
+	defer plugin.Unlock()
+	for _, unsupportedCommand := range plugin.unsupportedCommands {
+		if command == unsupportedCommand {
+			return true
+		}
+	}
+	return false
+}
+
+func (plugin *flexVolumePlugin) GetDeviceMountRefs(deviceMountPath string) ([]string, error) {
+	mounter := plugin.host.GetMounter(plugin.GetPluginName())
+	return mount.GetMountRefs(mounter, deviceMountPath)
+}
+
+func (plugin *flexVolumePlugin) getDeviceMountPath(spec *volume.Spec) (string, error) {
+	volumeName, err := plugin.GetVolumeName(spec)
+	if err != nil {
+		return "", fmt.Errorf("GetVolumeName failed from getDeviceMountPath: %s", err)
+	}
+
+	mountsDir := path.Join(plugin.host.GetPluginDir(flexVolumePluginName), plugin.driverName, "mounts")
+	return path.Join(mountsDir, volumeName), nil
+}

vendor/k8s.io/kubernetes/pkg/volume/flexvolume/plugin_test.go

@@ -0,0 +1,56 @@
+/*
+Copyright 2017 The Kubernetes Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package flexvolume
+
+import (
+	"testing"
+
+	exec "k8s.io/utils/exec/testing"
+)
+
+func TestInit(t *testing.T) {
+	plugin, _ := testPlugin()
+	plugin.runner = fakeRunner(
+		assertDriverCall(t, successOutput(), "init"),
+	)
+	plugin.Init(plugin.host)
+}
+
+func fakeVolumeNameOutput(name string) exec.FakeCombinedOutputAction {
+	return fakeResultOutput(&DriverStatus{
+		Status:     StatusSuccess,
+		VolumeName: name,
+	})
+}
+
+func TestGetVolumeName(t *testing.T) {
+	spec := fakeVolumeSpec()
+	plugin, _ := testPlugin()
+	plugin.runner = fakeRunner(
+		assertDriverCall(t, fakeVolumeNameOutput(spec.Name()), getVolumeNameCmd,
+			specJson(plugin, spec, nil)),
+	)
+
+	name, err := plugin.GetVolumeName(spec)
+	if err != nil {
+		t.Errorf("GetVolumeName() failed: %v", err)
+	}
+	expectedName := spec.Name()
+	if name != expectedName {
+		t.Errorf("GetVolumeName() returned %v instead of %v", name, expectedName)
+	}
+}

vendor/k8s.io/kubernetes/pkg/volume/flexvolume/probe.go

@@ -0,0 +1,285 @@
+/*
+Copyright 2017 The Kubernetes Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package flexvolume
+
+import (
+	"github.com/golang/glog"
+	"k8s.io/kubernetes/pkg/volume"
+
+	"os"
+
+	"fmt"
+	"path/filepath"
+	"sync"
+
+	"github.com/fsnotify/fsnotify"
+	"k8s.io/apimachinery/pkg/util/errors"
+	utilfs "k8s.io/kubernetes/pkg/util/filesystem"
+	utilstrings "k8s.io/kubernetes/pkg/util/strings"
+	"strings"
+)
+
+type flexVolumeProber struct {
+	mutex          sync.Mutex
+	pluginDir      string // Flexvolume driver directory
+	watcher        utilfs.FSWatcher
+	factory        PluginFactory
+	fs             utilfs.Filesystem
+	probeAllNeeded bool
+	eventsMap      map[string]volume.ProbeOperation // the key is the driver directory path, the value is the coresponding operation
+}
+
+func GetDynamicPluginProber(pluginDir string) volume.DynamicPluginProber {
+	return &flexVolumeProber{
+		pluginDir: pluginDir,
+		watcher:   utilfs.NewFsnotifyWatcher(),
+		factory:   pluginFactory{},
+		fs:        &utilfs.DefaultFs{},
+	}
+}
+
+func (prober *flexVolumeProber) Init() error {
+	prober.testAndSetProbeAllNeeded(true)
+	prober.eventsMap = map[string]volume.ProbeOperation{}
+
+	if err := prober.createPluginDir(); err != nil {
+		return err
+	}
+	if err := prober.initWatcher(); err != nil {
+		return err
+	}
+
+	return nil
+}
+
+// If probeAllNeeded is true, probe all pluginDir
+// else probe events in eventsMap
+func (prober *flexVolumeProber) Probe() (events []volume.ProbeEvent, err error) {
+	if prober.probeAllNeeded {
+		prober.testAndSetProbeAllNeeded(false)
+		return prober.probeAll()
+	}
+
+	return prober.probeMap()
+}
+
+func (prober *flexVolumeProber) probeMap() (events []volume.ProbeEvent, err error) {
+	// TODO use a concurrent map to avoid Locking the entire map
+	prober.mutex.Lock()
+	defer prober.mutex.Unlock()
+	probeEvents := []volume.ProbeEvent{}
+	allErrs := []error{}
+	for driverDirPathAbs, op := range prober.eventsMap {
+		driverDirName := filepath.Base(driverDirPathAbs) // e.g. driverDirName = vendor~cifs
+		probeEvent, pluginErr := prober.newProbeEvent(driverDirName, op)
+		if pluginErr != nil {
+			allErrs = append(allErrs, pluginErr)
+			continue
+		}
+		probeEvents = append(probeEvents, probeEvent)
+
+		delete(prober.eventsMap, driverDirPathAbs)
+	}
+	return probeEvents, errors.NewAggregate(allErrs)
+}
+
+func (prober *flexVolumeProber) probeAll() (events []volume.ProbeEvent, err error) {
+	probeEvents := []volume.ProbeEvent{}
+	allErrs := []error{}
+	files, err := prober.fs.ReadDir(prober.pluginDir)
+	if err != nil {
+		return nil, fmt.Errorf("Error reading the Flexvolume directory: %s", err)
+	}
+	for _, f := range files {
+		// only directories with names that do not begin with '.' are counted as plugins
+		// and pluginDir/dirname/dirname should be an executable
+		// unless dirname contains '~' for escaping namespace
+		// e.g. dirname = vendor~cifs
+		// then, executable will be pluginDir/dirname/cifs
+		if f.IsDir() && filepath.Base(f.Name())[0] != '.' {
+			probeEvent, pluginErr := prober.newProbeEvent(f.Name(), volume.ProbeAddOrUpdate)
+			if pluginErr != nil {
+				allErrs = append(allErrs, pluginErr)
+				continue
+			}
+			probeEvents = append(probeEvents, probeEvent)
+		}
+	}
+	return probeEvents, errors.NewAggregate(allErrs)
+}
+
+func (prober *flexVolumeProber) newProbeEvent(driverDirName string, op volume.ProbeOperation) (volume.ProbeEvent, error) {
+	probeEvent := volume.ProbeEvent{
+		Op: op,
+	}
+	if op == volume.ProbeAddOrUpdate {
+		plugin, pluginErr := prober.factory.NewFlexVolumePlugin(prober.pluginDir, driverDirName)
+		if pluginErr != nil {
+			pluginErr = fmt.Errorf(
+				"Error creating Flexvolume plugin from directory %s, skipping. Error: %s",
+				driverDirName, pluginErr)
+			return probeEvent, pluginErr
+		}
+		probeEvent.Plugin = plugin
+		probeEvent.PluginName = plugin.GetPluginName()
+	} else if op == volume.ProbeRemove {
+		driverName := utilstrings.UnescapePluginName(driverDirName)
+		probeEvent.PluginName = flexVolumePluginNamePrefix + driverName
+
+	} else {
+		return probeEvent, fmt.Errorf("Unknown Operation on directory: %s. ", driverDirName)
+	}
+	return probeEvent, nil
+}
+
+func (prober *flexVolumeProber) handleWatchEvent(event fsnotify.Event) error {
+	// event.Name is the watched path.
+	if filepath.Base(event.Name)[0] == '.' {
+		// Ignore files beginning with '.'
+		return nil
+	}
+
+	eventPathAbs, err := filepath.Abs(event.Name)
+	if err != nil {
+		return err
+	}
+	parentPathAbs := filepath.Dir(eventPathAbs)
+	pluginDirAbs, err := filepath.Abs(prober.pluginDir)
+	if err != nil {
+		return err
+	}
+
+	// event of pluginDirAbs
+	if eventPathAbs == pluginDirAbs {
+		// If the Flexvolume plugin directory is removed, need to recreate it
+		// in order to keep it under watch.
+		if eventOpIs(event, fsnotify.Remove) {
+			if err := prober.createPluginDir(); err != nil {
+				return err
+			}
+			if err := prober.addWatchRecursive(pluginDirAbs); err != nil {
+				return err
+			}
+		}
+		return nil
+	}
+
+	// watch newly added subdirectories inside a driver directory
+	if eventOpIs(event, fsnotify.Create) {
+		if err := prober.addWatchRecursive(eventPathAbs); err != nil {
+			return err
+		}
+	}
+
+	eventRelPathToPluginDir, err := filepath.Rel(pluginDirAbs, eventPathAbs)
+	if err != nil {
+		return err
+	}
+
+	// event inside specific driver dir
+	if len(eventRelPathToPluginDir) > 0 {
+		driverDirName := strings.Split(eventRelPathToPluginDir, string(os.PathSeparator))[0]
+		driverDirAbs := filepath.Join(pluginDirAbs, driverDirName)
+		// executable is removed, will trigger ProbeRemove event
+		if eventOpIs(event, fsnotify.Remove) && (eventRelPathToPluginDir == getExecutablePathRel(driverDirName) || parentPathAbs == pluginDirAbs) {
+			prober.updateEventsMap(driverDirAbs, volume.ProbeRemove)
+		} else {
+			prober.updateEventsMap(driverDirAbs, volume.ProbeAddOrUpdate)
+		}
+	}
+
+	return nil
+}
+
+// getExecutableName returns the executableName of a flex plugin
+func getExecutablePathRel(driverDirName string) string {
+	parts := strings.Split(driverDirName, "~")
+	return filepath.Join(driverDirName, parts[len(parts)-1])
+}
+
+func (prober *flexVolumeProber) updateEventsMap(eventDirAbs string, op volume.ProbeOperation) {
+	prober.mutex.Lock()
+	defer prober.mutex.Unlock()
+	if prober.probeAllNeeded {
+		return
+	}
+	prober.eventsMap[eventDirAbs] = op
+}
+
+// Recursively adds to watch all directories inside and including the file specified by the given filename.
+// If the file is a symlink to a directory, it will watch the symlink but not any of the subdirectories.
+//
+// Each file or directory change triggers two events: one from the watch on itself, another from the watch
+// on its parent directory.
+func (prober *flexVolumeProber) addWatchRecursive(filename string) error {
+	addWatch := func(path string, info os.FileInfo, err error) error {
+		if err == nil && info.IsDir() {
+			if err := prober.watcher.AddWatch(path); err != nil {
+				glog.Errorf("Error recursively adding watch: %v", err)
+			}
+		}
+		return nil
+	}
+	return prober.fs.Walk(filename, addWatch)
+}
+
+// Creates a new filesystem watcher and adds watches for the plugin directory
+// and all of its subdirectories.
+func (prober *flexVolumeProber) initWatcher() error {
+	err := prober.watcher.Init(func(event fsnotify.Event) {
+		if err := prober.handleWatchEvent(event); err != nil {
+			glog.Errorf("Flexvolume prober watch: %s", err)
+		}
+	}, func(err error) {
+		glog.Errorf("Received an error from watcher: %s", err)
+	})
+	if err != nil {
+		return fmt.Errorf("Error initializing watcher: %s", err)
+	}
+
+	if err := prober.addWatchRecursive(prober.pluginDir); err != nil {
+		return fmt.Errorf("Error adding watch on Flexvolume directory: %s", err)
+	}
+
+	prober.watcher.Run()
+
+	return nil
+}
+
+// Creates the plugin directory, if it doesn't already exist.
+func (prober *flexVolumeProber) createPluginDir() error {
+	if _, err := prober.fs.Stat(prober.pluginDir); os.IsNotExist(err) {
+		glog.Warningf("Flexvolume plugin directory at %s does not exist. Recreating.", prober.pluginDir)
+		err := prober.fs.MkdirAll(prober.pluginDir, 0755)
+		if err != nil {
+			return fmt.Errorf("Error (re-)creating driver directory: %s", err)
+		}
+	}
+
+	return nil
+}
+
+func (prober *flexVolumeProber) testAndSetProbeAllNeeded(newval bool) (oldval bool) {
+	prober.mutex.Lock()
+	defer prober.mutex.Unlock()
+	oldval, prober.probeAllNeeded = prober.probeAllNeeded, newval
+	return
+}
+
+func eventOpIs(event fsnotify.Event, op fsnotify.Op) bool {
+	return event.Op&op == op
+}

vendor/k8s.io/kubernetes/pkg/volume/flexvolume/probe_test.go

@@ -0,0 +1,327 @@
+/*
+Copyright 2017 The Kubernetes Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package flexvolume
+
+import (
+	"fmt"
+	"path"
+	"testing"
+
+	"github.com/fsnotify/fsnotify"
+	"github.com/stretchr/testify/assert"
+	utilfs "k8s.io/kubernetes/pkg/util/filesystem"
+	"k8s.io/kubernetes/pkg/volume"
+)
+
+const (
+	pluginDir  = "/flexvolume"
+	driverName = "fake-driver"
+)
+
+// Probes a driver installed before prober initialization.
+func TestProberExistingDriverBeforeInit(t *testing.T) {
+	// Arrange
+	driverPath, _, watcher, prober := initTestEnvironment(t)
+
+	// Act
+	events, err := prober.Probe()
+
+	// Assert
+	// Probe occurs, 1 plugin should be returned, and 2 watches (pluginDir and all its
+	// current subdirectories) registered.
+	assert.Equal(t, 1, len(events))
+	assert.Equal(t, volume.ProbeAddOrUpdate, events[0].Op)
+	assert.Equal(t, pluginDir, watcher.watches[0])
+	assert.Equal(t, driverPath, watcher.watches[1])
+	assert.NoError(t, err)
+
+	// Should no longer probe.
+
+	// Act
+	events, err = prober.Probe()
+	// Assert
+	assert.Equal(t, 0, len(events))
+	assert.NoError(t, err)
+}
+
+// Probes newly added drivers after prober is running.
+func TestProberAddRemoveDriver(t *testing.T) {
+	// Arrange
+	_, fs, watcher, prober := initTestEnvironment(t)
+	prober.Probe()
+	events, err := prober.Probe()
+	assert.Equal(t, 0, len(events))
+
+	// Call probe after a file is added. Should return 1 event.
+
+	// add driver
+	const driverName2 = "fake-driver2"
+	driverPath := path.Join(pluginDir, driverName2)
+	executablePath := path.Join(driverPath, driverName2)
+	installDriver(driverName2, fs)
+	watcher.TriggerEvent(fsnotify.Create, driverPath)
+	watcher.TriggerEvent(fsnotify.Create, executablePath)
+
+	// Act
+	events, err = prober.Probe()
+
+	// Assert
+	assert.Equal(t, 1, len(events))
+	assert.Equal(t, volume.ProbeAddOrUpdate, events[0].Op)               // 1 newly added
+	assert.Equal(t, driverPath, watcher.watches[len(watcher.watches)-1]) // Checks most recent watch
+	assert.NoError(t, err)
+
+	// Call probe again, should return 0 event.
+
+	// Act
+	events, err = prober.Probe()
+	// Assert
+	assert.Equal(t, 0, len(events))
+	assert.NoError(t, err)
+
+	// Call probe after a non-driver file is added in a subdirectory. should return 1 event.
+	fp := path.Join(driverPath, "dummyfile")
+	fs.Create(fp)
+	watcher.TriggerEvent(fsnotify.Create, fp)
+
+	// Act
+	events, err = prober.Probe()
+
+	// Assert
+	assert.Equal(t, 1, len(events))
+	assert.Equal(t, volume.ProbeAddOrUpdate, events[0].Op)
+	assert.NoError(t, err)
+
+	// Call probe again, should return 0 event.
+	// Act
+	events, err = prober.Probe()
+	// Assert
+	assert.Equal(t, 0, len(events))
+	assert.NoError(t, err)
+
+	// Call probe after a subdirectory is added in a driver directory. should return 1 event.
+	subdirPath := path.Join(driverPath, "subdir")
+	fs.Create(subdirPath)
+	watcher.TriggerEvent(fsnotify.Create, subdirPath)
+
+	// Act
+	events, err = prober.Probe()
+
+	// Assert
+	assert.Equal(t, 1, len(events))
+	assert.Equal(t, volume.ProbeAddOrUpdate, events[0].Op)
+	assert.NoError(t, err)
+
+	// Call probe again, should return 0 event.
+	// Act
+	events, err = prober.Probe()
+	// Assert
+	assert.Equal(t, 0, len(events))
+	assert.NoError(t, err)
+
+	// Call probe after a subdirectory is removed in a driver directory. should return 1 event.
+	fs.Remove(subdirPath)
+	watcher.TriggerEvent(fsnotify.Remove, subdirPath)
+
+	// Act
+	events, err = prober.Probe()
+
+	// Assert
+	assert.Equal(t, 1, len(events))
+	assert.Equal(t, volume.ProbeAddOrUpdate, events[0].Op)
+	assert.NoError(t, err)
+
+	// Call probe again, should return 0 event.
+	// Act
+	events, err = prober.Probe()
+	// Assert
+	assert.Equal(t, 0, len(events))
+	assert.NoError(t, err)
+
+	// Call probe after a driver executable and driver directory is remove. should return 1 event.
+	fs.Remove(executablePath)
+	fs.Remove(driverPath)
+	watcher.TriggerEvent(fsnotify.Remove, executablePath)
+	watcher.TriggerEvent(fsnotify.Remove, driverPath)
+	// Act and Assert: 1 ProbeRemove event
+	events, err = prober.Probe()
+	assert.Equal(t, 1, len(events))
+	assert.Equal(t, volume.ProbeRemove, events[0].Op)
+	assert.NoError(t, err)
+
+	// Act and Assert: 0 event
+	events, err = prober.Probe()
+	assert.Equal(t, 0, len(events))
+	assert.NoError(t, err)
+}
+
+// Tests the behavior when no drivers exist in the plugin directory.
+func TestEmptyPluginDir(t *testing.T) {
+	// Arrange
+	fs := utilfs.NewFakeFs()
+	watcher := NewFakeWatcher()
+	prober := &flexVolumeProber{
+		pluginDir: pluginDir,
+		watcher:   watcher,
+		fs:        fs,
+		factory:   fakePluginFactory{error: false},
+	}
+	prober.Init()
+
+	// Act
+	events, err := prober.Probe()
+
+	// Assert
+	assert.Equal(t, 0, len(events))
+	assert.NoError(t, err)
+}
+
+// Issue an event to remove plugindir. New directory should still be watched.
+func TestRemovePluginDir(t *testing.T) {
+	// Arrange
+	driverPath, fs, watcher, _ := initTestEnvironment(t)
+	fs.RemoveAll(pluginDir)
+	watcher.TriggerEvent(fsnotify.Remove, path.Join(driverPath, driverName))
+	watcher.TriggerEvent(fsnotify.Remove, driverPath)
+	watcher.TriggerEvent(fsnotify.Remove, pluginDir)
+
+	// Act: The handler triggered by the above events should have already handled the event appropriately.
+
+	// Assert
+	assert.Equal(t, 3, len(watcher.watches)) // 2 from initial setup, 1 from new watch.
+	assert.Equal(t, pluginDir, watcher.watches[len(watcher.watches)-1])
+}
+
+// Issue an event to remove plugindir. New directory should still be watched.
+func TestNestedDriverDir(t *testing.T) {
+	// Arrange
+	_, fs, watcher, _ := initTestEnvironment(t)
+	// Assert
+	assert.Equal(t, 2, len(watcher.watches)) // 2 from initial setup
+
+	// test add testDriverName
+	testDriverName := "testDriverName"
+	testDriverPath := path.Join(pluginDir, testDriverName)
+	fs.MkdirAll(testDriverPath, 0666)
+	watcher.TriggerEvent(fsnotify.Create, testDriverPath)
+	// Assert
+	assert.Equal(t, 3, len(watcher.watches)) // 2 from initial setup, 1 from new watch.
+	assert.Equal(t, testDriverPath, watcher.watches[len(watcher.watches)-1])
+
+	// test add nested subdir inside testDriverName
+	basePath := testDriverPath
+	for i := 0; i < 10; i++ {
+		subdirName := "subdirName"
+		subdirPath := path.Join(basePath, subdirName)
+		fs.MkdirAll(subdirPath, 0666)
+		watcher.TriggerEvent(fsnotify.Create, subdirPath)
+		// Assert
+		assert.Equal(t, 4+i, len(watcher.watches)) // 3 + newly added
+		assert.Equal(t, subdirPath, watcher.watches[len(watcher.watches)-1])
+		basePath = subdirPath
+	}
+}
+
+// Issue multiple events and probe multiple times.
+func TestProberMultipleEvents(t *testing.T) {
+	const iterations = 5
+
+	// Arrange
+	_, fs, watcher, prober := initTestEnvironment(t)
+	for i := 0; i < iterations; i++ {
+		newDriver := fmt.Sprintf("multi-event-driver%d", 1)
+		installDriver(newDriver, fs)
+		driverPath := path.Join(pluginDir, newDriver)
+		watcher.TriggerEvent(fsnotify.Create, driverPath)
+		watcher.TriggerEvent(fsnotify.Create, path.Join(driverPath, newDriver))
+	}
+
+	// Act
+	events, err := prober.Probe()
+
+	// Assert
+	assert.Equal(t, 2, len(events))
+	assert.Equal(t, volume.ProbeAddOrUpdate, events[0].Op)
+	assert.Equal(t, volume.ProbeAddOrUpdate, events[1].Op)
+	assert.NoError(t, err)
+	for i := 0; i < iterations-1; i++ {
+		events, err = prober.Probe()
+		assert.Equal(t, 0, len(events))
+		assert.NoError(t, err)
+	}
+}
+
+func TestProberError(t *testing.T) {
+	fs := utilfs.NewFakeFs()
+	watcher := NewFakeWatcher()
+	prober := &flexVolumeProber{
+		pluginDir: pluginDir,
+		watcher:   watcher,
+		fs:        fs,
+		factory:   fakePluginFactory{error: true},
+	}
+	installDriver(driverName, fs)
+	prober.Init()
+
+	_, err := prober.Probe()
+	assert.Error(t, err)
+}
+
+// Installs a mock driver (an empty file) in the mock fs.
+func installDriver(driverName string, fs utilfs.Filesystem) {
+	driverPath := path.Join(pluginDir, driverName)
+	fs.MkdirAll(driverPath, 0666)
+	fs.Create(path.Join(driverPath, driverName))
+}
+
+// Initializes mocks, installs a single driver in the mock fs, then initializes prober.
+func initTestEnvironment(t *testing.T) (
+	driverPath string,
+	fs utilfs.Filesystem,
+	watcher *fakeWatcher,
+	prober volume.DynamicPluginProber) {
+	fs = utilfs.NewFakeFs()
+	watcher = NewFakeWatcher()
+	prober = &flexVolumeProber{
+		pluginDir: pluginDir,
+		watcher:   watcher,
+		fs:        fs,
+		factory:   fakePluginFactory{error: false},
+	}
+	driverPath = path.Join(pluginDir, driverName)
+	installDriver(driverName, fs)
+	prober.Init()
+
+	assert.NotNilf(t, watcher.eventHandler,
+		"Expect watch event handler to be registered after prober init, but is not.")
+	return
+}
+
+// Fake Flexvolume plugin
+type fakePluginFactory struct {
+	error bool // Indicates whether an error should be returned.
+}
+
+var _ PluginFactory = fakePluginFactory{}
+
+func (m fakePluginFactory) NewFlexVolumePlugin(_, driverName string) (volume.VolumePlugin, error) {
+	if m.error {
+		return nil, fmt.Errorf("Flexvolume plugin error")
+	}
+	// Dummy Flexvolume plugin. Prober never interacts with the plugin.
+	return &flexVolumePlugin{driverName: driverName}, nil
+}

vendor/k8s.io/kubernetes/pkg/volume/flexvolume/unmounter-defaults.go

@@ -0,0 +1,29 @@
+/*
+Copyright 2017 The Kubernetes Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package flexvolume
+
+import (
+	"github.com/golang/glog"
+	"k8s.io/kubernetes/pkg/volume/util"
+)
+
+type unmounterDefaults flexVolumeUnmounter
+
+func (f *unmounterDefaults) TearDownAt(dir string) error {
+	glog.Warning(logPrefix(f.plugin), "using default TearDownAt for ", dir)
+	return util.UnmountPath(dir, f.mounter)
+}

vendor/k8s.io/kubernetes/pkg/volume/flexvolume/unmounter.go

@@ -0,0 +1,71 @@
+/*
+Copyright 2017 The Kubernetes Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package flexvolume
+
+import (
+	"fmt"
+	"os"
+
+	"github.com/golang/glog"
+	"k8s.io/kubernetes/pkg/volume"
+	"k8s.io/kubernetes/pkg/volume/util"
+	"k8s.io/utils/exec"
+)
+
+// FlexVolumeUnmounter is the disk that will be cleaned by this plugin.
+type flexVolumeUnmounter struct {
+	*flexVolume
+	// Runner used to teardown the volume.
+	runner exec.Interface
+	volume.MetricsNil
+}
+
+var _ volume.Unmounter = &flexVolumeUnmounter{}
+
+// Unmounter interface
+func (f *flexVolumeUnmounter) TearDown() error {
+	path := f.GetPath()
+	return f.TearDownAt(path)
+}
+
+func (f *flexVolumeUnmounter) TearDownAt(dir string) error {
+
+	if pathExists, pathErr := util.PathExists(dir); pathErr != nil {
+		return fmt.Errorf("Error checking if path exists: %v", pathErr)
+	} else if !pathExists {
+		glog.Warningf("Warning: Unmount skipped because path does not exist: %v", dir)
+		return nil
+	}
+
+	call := f.plugin.NewDriverCall(unmountCmd)
+	call.Append(dir)
+	_, err := call.Run()
+	if isCmdNotSupportedErr(err) {
+		err = (*unmounterDefaults)(f).TearDownAt(dir)
+	}
+	if err != nil {
+		return err
+	}
+
+	// Flexvolume driver may remove the directory. Ignore if it does.
+	if pathExists, pathErr := util.PathExists(dir); pathErr != nil {
+		return fmt.Errorf("Error checking if path exists: %v", pathErr)
+	} else if !pathExists {
+		return nil
+	}
+	return os.Remove(dir)
+}

vendor/k8s.io/kubernetes/pkg/volume/flexvolume/unmounter_test.go

@@ -0,0 +1,37 @@
+/*
+Copyright 2017 The Kubernetes Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package flexvolume
+
+import (
+	"testing"
+
+	"k8s.io/apimachinery/pkg/types"
+	"k8s.io/kubernetes/pkg/util/mount"
+)
+
+func TestTearDownAt(t *testing.T) {
+	mounter := &mount.FakeMounter{}
+
+	plugin, rootDir := testPlugin()
+	plugin.runner = fakeRunner(
+		assertDriverCall(t, notSupportedOutput(), unmountCmd,
+			rootDir+"/mount-dir"),
+	)
+
+	u, _ := plugin.newUnmounterInternal("volName", types.UID("poduid"), mounter, plugin.runner)
+	u.TearDownAt(rootDir + "/mount-dir")
+}

vendor/k8s.io/kubernetes/pkg/volume/flexvolume/util.go

@@ -0,0 +1,157 @@
+/*
+Copyright 2017 The Kubernetes Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package flexvolume
+
+import (
+	"encoding/base64"
+	"fmt"
+	"os"
+
+	"github.com/golang/glog"
+	"k8s.io/kubernetes/pkg/util/mount"
+	"k8s.io/kubernetes/pkg/volume"
+	"k8s.io/kubernetes/pkg/volume/util"
+)
+
+func addSecretsToOptions(options map[string]string, spec *volume.Spec, namespace string, driverName string, host volume.VolumeHost) error {
+	secretName, secretNamespace, err := getSecretNameAndNamespace(spec, namespace)
+	if err != nil {
+		return err
+	}
+
+	if len(secretName) == 0 || len(secretNamespace) == 0 {
+		return nil
+	}
+
+	kubeClient := host.GetKubeClient()
+	if kubeClient == nil {
+		return fmt.Errorf("Cannot get kube client")
+	}
+
+	secrets, err := util.GetSecretForPV(secretNamespace, secretName, driverName, host.GetKubeClient())
+	if err != nil {
+		err = fmt.Errorf("Couldn't get secret %v/%v err: %v", secretNamespace, secretName, err)
+		return err
+	}
+	for name, data := range secrets {
+		options[optionKeySecret+"/"+name] = base64.StdEncoding.EncodeToString([]byte(data))
+		glog.V(1).Infof("found flex volume secret info: %s", name)
+	}
+
+	return nil
+}
+
+var notFlexVolume = fmt.Errorf("not a flex volume")
+
+func getDriver(spec *volume.Spec) (string, error) {
+	if spec.Volume != nil && spec.Volume.FlexVolume != nil {
+		return spec.Volume.FlexVolume.Driver, nil
+	}
+	if spec.PersistentVolume != nil && spec.PersistentVolume.Spec.FlexVolume != nil {
+		return spec.PersistentVolume.Spec.FlexVolume.Driver, nil
+	}
+	return "", notFlexVolume
+}
+
+func getFSType(spec *volume.Spec) (string, error) {
+	if spec.Volume != nil && spec.Volume.FlexVolume != nil {
+		return spec.Volume.FlexVolume.FSType, nil
+	}
+	if spec.PersistentVolume != nil && spec.PersistentVolume.Spec.FlexVolume != nil {
+		return spec.PersistentVolume.Spec.FlexVolume.FSType, nil
+	}
+	return "", notFlexVolume
+}
+
+func getSecretNameAndNamespace(spec *volume.Spec, podNamespace string) (string, string, error) {
+	if spec.Volume != nil && spec.Volume.FlexVolume != nil {
+		if spec.Volume.FlexVolume.SecretRef == nil {
+			return "", "", nil
+		}
+		return spec.Volume.FlexVolume.SecretRef.Name, podNamespace, nil
+	}
+	if spec.PersistentVolume != nil && spec.PersistentVolume.Spec.FlexVolume != nil {
+		if spec.PersistentVolume.Spec.FlexVolume.SecretRef == nil {
+			return "", "", nil
+		}
+		secretName := spec.PersistentVolume.Spec.FlexVolume.SecretRef.Name
+		secretNamespace := spec.PersistentVolume.Spec.FlexVolume.SecretRef.Namespace
+		if len(secretNamespace) == 0 {
+			secretNamespace = podNamespace
+		}
+		return secretName, secretNamespace, nil
+	}
+	return "", "", notFlexVolume
+}
+
+func getReadOnly(spec *volume.Spec) (bool, error) {
+	if spec.Volume != nil && spec.Volume.FlexVolume != nil {
+		return spec.Volume.FlexVolume.ReadOnly, nil
+	}
+	if spec.PersistentVolume != nil && spec.PersistentVolume.Spec.FlexVolume != nil {
+		// ReadOnly is specified at the PV level
+		return spec.ReadOnly, nil
+	}
+	return false, notFlexVolume
+}
+
+func getOptions(spec *volume.Spec) (map[string]string, error) {
+	if spec.Volume != nil && spec.Volume.FlexVolume != nil {
+		return spec.Volume.FlexVolume.Options, nil
+	}
+	if spec.PersistentVolume != nil && spec.PersistentVolume.Spec.FlexVolume != nil {
+		return spec.PersistentVolume.Spec.FlexVolume.Options, nil
+	}
+	return nil, notFlexVolume
+}
+
+func prepareForMount(mounter mount.Interface, deviceMountPath string) (bool, error) {
+
+	notMnt, err := mounter.IsLikelyNotMountPoint(deviceMountPath)
+	if err != nil {
+		if os.IsNotExist(err) {
+			if err := os.MkdirAll(deviceMountPath, 0750); err != nil {
+				return false, err
+			}
+			notMnt = true
+		} else {
+			return false, err
+		}
+	}
+
+	return !notMnt, nil
+}
+
+// Mounts the device at the given path.
+// It is expected that prepareForMount has been called before.
+func doMount(mounter mount.Interface, devicePath, deviceMountPath, fsType string, options []string) error {
+	err := mounter.Mount(devicePath, deviceMountPath, fsType, options)
+	if err != nil {
+		glog.Errorf("Failed to mount the volume at %s, device: %s, error: %s", deviceMountPath, devicePath, err.Error())
+		return err
+	}
+	return nil
+}
+
+func isNotMounted(mounter mount.Interface, deviceMountPath string) (bool, error) {
+	notmnt, err := mounter.IsLikelyNotMountPoint(deviceMountPath)
+	if err != nil {
+		glog.Errorf("Error checking mount point %s, error: %v", deviceMountPath, err)
+		return false, err
+	}
+	return notmnt, nil
+}

vendor/k8s.io/kubernetes/pkg/volume/flexvolume/volume.go

@@ -0,0 +1,52 @@
+/*
+Copyright 2017 The Kubernetes Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package flexvolume
+
+import (
+	"k8s.io/apimachinery/pkg/types"
+	"k8s.io/kubernetes/pkg/util/mount"
+	utilstrings "k8s.io/kubernetes/pkg/util/strings"
+)
+
+type flexVolume struct {
+	// driverName is the name of the plugin driverName.
+	driverName string
+	// Driver executable used to setup the volume.
+	execPath string
+	// mounter provides the interface that is used to mount the actual
+	// block device.
+	mounter mount.Interface
+	// podName is the name of the pod, if available.
+	podName string
+	// podUID is the UID of the pod.
+	podUID types.UID
+	// podNamespace is the namespace of the pod, if available.
+	podNamespace string
+	// podServiceAccountName is the service account name of the pod, if available.
+	podServiceAccountName string
+	// volName is the name of the pod's volume.
+	volName string
+	// the underlying plugin
+	plugin *flexVolumePlugin
+}
+
+// volume.Volume interface
+
+func (f *flexVolume) GetPath() string {
+	name := f.driverName
+	return f.plugin.host.GetPodVolumeDir(f.podUID, utilstrings.EscapeQualifiedNameForDisk(name), f.volName)
+}