Add generated file

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

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

@@ -0,0 +1,64 @@
+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",
+        "disk_manager.go",
+        "doc.go",
+        "iscsi.go",
+        "iscsi_util.go",
+    ],
+    importpath = "k8s.io/kubernetes/pkg/volume/iscsi",
+    deps = [
+        "//pkg/features: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",
+        "//pkg/volume/util/volumepathhandler: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/apis/meta/v1:go_default_library",
+        "//vendor/k8s.io/apimachinery/pkg/types:go_default_library",
+        "//vendor/k8s.io/apiserver/pkg/util/feature:go_default_library",
+    ],
+)
+
+go_test(
+    name = "go_default_test",
+    srcs = [
+        "iscsi_test.go",
+        "iscsi_util_test.go",
+    ],
+    embed = [":go_default_library"],
+    deps = [
+        "//pkg/util/mount:go_default_library",
+        "//pkg/volume:go_default_library",
+        "//pkg/volume/testing: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/kubernetes/fake:go_default_library",
+        "//vendor/k8s.io/client-go/util/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/iscsi/OWNERS

@@ -0,0 +1,12 @@
+approvers:
+- pmorie
+- saad-ali
+- rootfs
+reviewers:
+- saad-ali
+- jsafrane
+- rootfs
+- humblec
+- jingxu97
+- msau42
+- mtanino 

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

@@ -0,0 +1,220 @@
+/*
+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 iscsi
+
+import (
+	"fmt"
+	"os"
+	"time"
+
+	"github.com/golang/glog"
+	"k8s.io/api/core/v1"
+	"k8s.io/apimachinery/pkg/types"
+	utilfeature "k8s.io/apiserver/pkg/util/feature"
+	"k8s.io/kubernetes/pkg/features"
+	"k8s.io/kubernetes/pkg/util/mount"
+	"k8s.io/kubernetes/pkg/volume"
+	volumeutil "k8s.io/kubernetes/pkg/volume/util"
+)
+
+type iscsiAttacher struct {
+	host    volume.VolumeHost
+	manager diskManager
+}
+
+var _ volume.Attacher = &iscsiAttacher{}
+
+var _ volume.AttachableVolumePlugin = &iscsiPlugin{}
+
+func (plugin *iscsiPlugin) NewAttacher() (volume.Attacher, error) {
+	return &iscsiAttacher{
+		host:    plugin.host,
+		manager: &ISCSIUtil{},
+	}, nil
+}
+
+func (plugin *iscsiPlugin) GetDeviceMountRefs(deviceMountPath string) ([]string, error) {
+	mounter := plugin.host.GetMounter(iscsiPluginName)
+	return mount.GetMountRefs(mounter, deviceMountPath)
+}
+
+func (attacher *iscsiAttacher) Attach(spec *volume.Spec, nodeName types.NodeName) (string, error) {
+	return "", nil
+}
+
+func (attacher *iscsiAttacher) 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
+	}
+
+	return volumesAttachedCheck, nil
+}
+
+func (attacher *iscsiAttacher) WaitForAttach(spec *volume.Spec, devicePath string, pod *v1.Pod, timeout time.Duration) (string, error) {
+	mounter, err := volumeSpecToMounter(spec, attacher.host, pod)
+	if err != nil {
+		glog.Warningf("failed to get iscsi mounter: %v", err)
+		return "", err
+	}
+	return attacher.manager.AttachDisk(*mounter)
+}
+
+func (attacher *iscsiAttacher) GetDeviceMountPath(
+	spec *volume.Spec) (string, error) {
+	mounter, err := volumeSpecToMounter(spec, attacher.host, nil)
+	if err != nil {
+		glog.Warningf("failed to get iscsi mounter: %v", err)
+		return "", err
+	}
+	if mounter.InitiatorName != "" {
+		// new iface name is <target portal>:<volume name>
+		mounter.Iface = mounter.Portals[0] + ":" + mounter.VolName
+	}
+	return attacher.manager.MakeGlobalPDName(*mounter.iscsiDisk), nil
+}
+
+func (attacher *iscsiAttacher) MountDevice(spec *volume.Spec, devicePath string, deviceMountPath string) error {
+	mounter := attacher.host.GetMounter(iscsiPluginName)
+	notMnt, err := mounter.IsLikelyNotMountPoint(deviceMountPath)
+	if err != nil {
+		if os.IsNotExist(err) {
+			if err := os.MkdirAll(deviceMountPath, 0750); err != nil {
+				return err
+			}
+			notMnt = true
+		} else {
+			return err
+		}
+	}
+	readOnly, fsType, err := getISCSIVolumeInfo(spec)
+	if err != nil {
+		return err
+	}
+
+	options := []string{}
+	if readOnly {
+		options = append(options, "ro")
+	}
+	if notMnt {
+		diskMounter := &mount.SafeFormatAndMount{Interface: mounter, Exec: attacher.host.GetExec(iscsiPluginName)}
+		mountOptions := volumeutil.MountOptionFromSpec(spec, options...)
+		err = diskMounter.FormatAndMount(devicePath, deviceMountPath, fsType, mountOptions)
+		if err != nil {
+			os.Remove(deviceMountPath)
+			return err
+		}
+	}
+	return nil
+}
+
+type iscsiDetacher struct {
+	host    volume.VolumeHost
+	mounter mount.Interface
+	manager diskManager
+}
+
+var _ volume.Detacher = &iscsiDetacher{}
+
+func (plugin *iscsiPlugin) NewDetacher() (volume.Detacher, error) {
+	return &iscsiDetacher{
+		host:    plugin.host,
+		mounter: plugin.host.GetMounter(iscsiPluginName),
+		manager: &ISCSIUtil{},
+	}, nil
+}
+
+func (detacher *iscsiDetacher) Detach(volumeName string, nodeName types.NodeName) error {
+	return nil
+}
+
+func (detacher *iscsiDetacher) UnmountDevice(deviceMountPath string) error {
+	unMounter := volumeSpecToUnmounter(detacher.mounter, detacher.host)
+	err := detacher.manager.DetachDisk(*unMounter, deviceMountPath)
+	if err != nil {
+		return fmt.Errorf("iscsi: failed to detach disk: %s\nError: %v", deviceMountPath, err)
+	}
+	glog.V(4).Infof("iscsi: %q is unmounted, deleting the directory", deviceMountPath)
+	err = os.RemoveAll(deviceMountPath)
+	if err != nil {
+		return fmt.Errorf("iscsi: failed to delete the directory: %s\nError: %v", deviceMountPath, err)
+	}
+	glog.V(4).Infof("iscsi: successfully detached disk: %s", deviceMountPath)
+	return nil
+}
+
+func volumeSpecToMounter(spec *volume.Spec, host volume.VolumeHost, pod *v1.Pod) (*iscsiDiskMounter, error) {
+	var secret map[string]string
+	readOnly, fsType, err := getISCSIVolumeInfo(spec)
+	if err != nil {
+		return nil, err
+	}
+	var podUID types.UID
+	if pod != nil {
+		secret, err = createSecretMap(spec, &iscsiPlugin{host: host}, pod.Namespace)
+		if err != nil {
+			return nil, err
+		}
+		podUID = pod.UID
+	}
+	iscsiDisk, err := createISCSIDisk(spec,
+		podUID,
+		&iscsiPlugin{host: host},
+		&ISCSIUtil{},
+		secret,
+	)
+	if err != nil {
+		return nil, err
+	}
+	exec := host.GetExec(iscsiPluginName)
+	// TODO: remove feature gate check after no longer needed
+	if utilfeature.DefaultFeatureGate.Enabled(features.BlockVolume) {
+		volumeMode, err := volumeutil.GetVolumeMode(spec)
+		if err != nil {
+			return nil, err
+		}
+		glog.V(5).Infof("iscsi: VolumeSpecToMounter volumeMode %s", volumeMode)
+		return &iscsiDiskMounter{
+			iscsiDisk:  iscsiDisk,
+			fsType:     fsType,
+			volumeMode: volumeMode,
+			readOnly:   readOnly,
+			mounter:    &mount.SafeFormatAndMount{Interface: host.GetMounter(iscsiPluginName), Exec: exec},
+			exec:       exec,
+			deviceUtil: volumeutil.NewDeviceHandler(volumeutil.NewIOHandler()),
+		}, nil
+	}
+	return &iscsiDiskMounter{
+		iscsiDisk:  iscsiDisk,
+		fsType:     fsType,
+		readOnly:   readOnly,
+		mounter:    &mount.SafeFormatAndMount{Interface: host.GetMounter(iscsiPluginName), Exec: exec},
+		exec:       exec,
+		deviceUtil: volumeutil.NewDeviceHandler(volumeutil.NewIOHandler()),
+	}, nil
+}
+
+func volumeSpecToUnmounter(mounter mount.Interface, host volume.VolumeHost) *iscsiDiskUnmounter {
+	exec := host.GetExec(iscsiPluginName)
+	return &iscsiDiskUnmounter{
+		iscsiDisk: &iscsiDisk{
+			plugin: &iscsiPlugin{},
+		},
+		mounter: mounter,
+		exec:    exec,
+	}
+}

vendor/k8s.io/kubernetes/pkg/volume/iscsi/disk_manager.go

@@ -0,0 +1,101 @@
+/*
+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 iscsi
+
+import (
+	"os"
+
+	"github.com/golang/glog"
+	"k8s.io/kubernetes/pkg/util/mount"
+	"k8s.io/kubernetes/pkg/volume"
+	"k8s.io/kubernetes/pkg/volume/util"
+)
+
+// Abstract interface to disk operations.
+type diskManager interface {
+	MakeGlobalPDName(disk iscsiDisk) string
+	MakeGlobalVDPDName(disk iscsiDisk) string
+	// Attaches the disk to the kubelet's host machine.
+	AttachDisk(b iscsiDiskMounter) (string, error)
+	// Detaches the disk from the kubelet's host machine.
+	DetachDisk(disk iscsiDiskUnmounter, mntPath string) error
+	// Detaches the block disk from the kubelet's host machine.
+	DetachBlockISCSIDisk(disk iscsiDiskUnmapper, mntPath string) error
+}
+
+// utility to mount a disk based filesystem
+// globalPDPath: global mount path like, /var/lib/kubelet/plugins/kubernetes.io/iscsi/{ifaceName}/{portal-some_iqn-lun-lun_id}
+// volPath: pod volume dir path like, /var/lib/kubelet/pods/{podUID}/volumes/kubernetes.io~iscsi/{volumeName}
+func diskSetUp(manager diskManager, b iscsiDiskMounter, volPath string, mounter mount.Interface, fsGroup *int64) error {
+	notMnt, err := mounter.IsLikelyNotMountPoint(volPath)
+	if err != nil && !os.IsNotExist(err) {
+		glog.Errorf("cannot validate mountpoint: %s", volPath)
+		return err
+	}
+	if !notMnt {
+		return nil
+	}
+
+	if err := os.MkdirAll(volPath, 0750); err != nil {
+		glog.Errorf("failed to mkdir:%s", volPath)
+		return err
+	}
+	// Perform a bind mount to the full path to allow duplicate mounts of the same disk.
+	options := []string{"bind"}
+	if b.readOnly {
+		options = append(options, "ro")
+	}
+	if b.iscsiDisk.InitiatorName != "" {
+		// new iface name is <target portal>:<volume name>
+		b.iscsiDisk.Iface = b.iscsiDisk.Portals[0] + ":" + b.iscsiDisk.VolName
+	}
+	globalPDPath := manager.MakeGlobalPDName(*b.iscsiDisk)
+	mountOptions := util.JoinMountOptions(b.mountOptions, options)
+	err = mounter.Mount(globalPDPath, volPath, "", mountOptions)
+	if err != nil {
+		glog.Errorf("Failed to bind mount: source:%s, target:%s, err:%v", globalPDPath, volPath, err)
+		noMnt, mntErr := b.mounter.IsLikelyNotMountPoint(volPath)
+		if mntErr != nil {
+			glog.Errorf("IsLikelyNotMountPoint check failed: %v", mntErr)
+			return err
+		}
+		if !noMnt {
+			if mntErr = b.mounter.Unmount(volPath); mntErr != nil {
+				glog.Errorf("Failed to unmount: %v", mntErr)
+				return err
+			}
+			noMnt, mntErr = b.mounter.IsLikelyNotMountPoint(volPath)
+			if mntErr != nil {
+				glog.Errorf("IsLikelyNotMountPoint check failed: %v", mntErr)
+				return err
+			}
+			if !noMnt {
+				//  will most likely retry on next sync loop.
+				glog.Errorf("%s is still mounted, despite call to unmount().  Will try again next sync loop.", volPath)
+				return err
+			}
+		}
+		os.Remove(volPath)
+		return err
+	}
+
+	if !b.readOnly {
+		volume.SetVolumeOwnership(&b, fsGroup)
+	}
+
+	return nil
+}

vendor/k8s.io/kubernetes/pkg/volume/iscsi/doc.go

@@ -0,0 +1,19 @@
+/*
+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 iscsi contains the internal representation of Internet Small
+// Computer System Interface (iSCSI) volumes.
+package iscsi // import "k8s.io/kubernetes/pkg/volume/iscsi"

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

@@ -0,0 +1,654 @@
+/*
+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 iscsi
+
+import (
+	"fmt"
+	"os"
+	"path/filepath"
+	"strconv"
+	"strings"
+
+	"github.com/golang/glog"
+	"k8s.io/api/core/v1"
+	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+	"k8s.io/apimachinery/pkg/types"
+	"k8s.io/kubernetes/pkg/util/mount"
+	utilstrings "k8s.io/kubernetes/pkg/util/strings"
+	"k8s.io/kubernetes/pkg/volume"
+	ioutil "k8s.io/kubernetes/pkg/volume/util"
+	"k8s.io/kubernetes/pkg/volume/util/volumepathhandler"
+)
+
+// This is the primary entrypoint for volume plugins.
+func ProbeVolumePlugins() []volume.VolumePlugin {
+	return []volume.VolumePlugin{&iscsiPlugin{nil}}
+}
+
+type iscsiPlugin struct {
+	host volume.VolumeHost
+}
+
+var _ volume.VolumePlugin = &iscsiPlugin{}
+var _ volume.PersistentVolumePlugin = &iscsiPlugin{}
+var _ volume.BlockVolumePlugin = &iscsiPlugin{}
+
+const (
+	iscsiPluginName = "kubernetes.io/iscsi"
+)
+
+func (plugin *iscsiPlugin) Init(host volume.VolumeHost) error {
+	plugin.host = host
+	return nil
+}
+
+func (plugin *iscsiPlugin) GetPluginName() string {
+	return iscsiPluginName
+}
+
+func (plugin *iscsiPlugin) GetVolumeName(spec *volume.Spec) (string, error) {
+	tp, _, iqn, lun, err := getISCSITargetInfo(spec)
+	if err != nil {
+		return "", err
+	}
+
+	return fmt.Sprintf("%v:%v:%v", tp, iqn, lun), nil
+}
+
+func (plugin *iscsiPlugin) CanSupport(spec *volume.Spec) bool {
+	return (spec.Volume != nil && spec.Volume.ISCSI != nil) || (spec.PersistentVolume != nil && spec.PersistentVolume.Spec.ISCSI != nil)
+}
+
+func (plugin *iscsiPlugin) RequiresRemount() bool {
+	return false
+}
+
+func (plugin *iscsiPlugin) SupportsMountOption() bool {
+	return true
+}
+
+func (plugin *iscsiPlugin) SupportsBulkVolumeVerification() bool {
+	return false
+}
+
+func (plugin *iscsiPlugin) GetAccessModes() []v1.PersistentVolumeAccessMode {
+	return []v1.PersistentVolumeAccessMode{
+		v1.ReadWriteOnce,
+		v1.ReadOnlyMany,
+	}
+}
+
+func (plugin *iscsiPlugin) NewMounter(spec *volume.Spec, pod *v1.Pod, _ volume.VolumeOptions) (volume.Mounter, error) {
+	if pod == nil {
+		return nil, fmt.Errorf("nil pod")
+	}
+	secret, err := createSecretMap(spec, plugin, pod.Namespace)
+	if err != nil {
+		return nil, err
+	}
+	return plugin.newMounterInternal(spec, pod.UID, &ISCSIUtil{}, plugin.host.GetMounter(plugin.GetPluginName()), plugin.host.GetExec(plugin.GetPluginName()), secret)
+}
+
+func (plugin *iscsiPlugin) newMounterInternal(spec *volume.Spec, podUID types.UID, manager diskManager, mounter mount.Interface, exec mount.Exec, secret map[string]string) (volume.Mounter, error) {
+	readOnly, fsType, err := getISCSIVolumeInfo(spec)
+	if err != nil {
+		return nil, err
+	}
+	iscsiDisk, err := createISCSIDisk(spec, podUID, plugin, manager, secret)
+	if err != nil {
+		return nil, err
+	}
+
+	if iscsiDisk != nil {
+
+		//Add volume metrics
+		iscsiDisk.MetricsProvider = volume.NewMetricsStatFS(iscsiDisk.GetPath())
+	}
+	return &iscsiDiskMounter{
+		iscsiDisk:    iscsiDisk,
+		fsType:       fsType,
+		readOnly:     readOnly,
+		mounter:      &mount.SafeFormatAndMount{Interface: mounter, Exec: exec},
+		exec:         exec,
+		deviceUtil:   ioutil.NewDeviceHandler(ioutil.NewIOHandler()),
+		mountOptions: ioutil.MountOptionFromSpec(spec),
+	}, nil
+}
+
+// NewBlockVolumeMapper creates a new volume.BlockVolumeMapper from an API specification.
+func (plugin *iscsiPlugin) NewBlockVolumeMapper(spec *volume.Spec, pod *v1.Pod, _ volume.VolumeOptions) (volume.BlockVolumeMapper, error) {
+	// If this is called via GenerateUnmapDeviceFunc(), pod is nil.
+	// Pass empty string as dummy uid since uid isn't used in the case.
+	var uid types.UID
+	var secret map[string]string
+	var err error
+	if pod != nil {
+		uid = pod.UID
+		secret, err = createSecretMap(spec, plugin, pod.Namespace)
+		if err != nil {
+			return nil, err
+		}
+	}
+	return plugin.newBlockVolumeMapperInternal(spec, uid, &ISCSIUtil{}, plugin.host.GetMounter(plugin.GetPluginName()), plugin.host.GetExec(plugin.GetPluginName()), secret)
+}
+
+func (plugin *iscsiPlugin) newBlockVolumeMapperInternal(spec *volume.Spec, podUID types.UID, manager diskManager, mounter mount.Interface, exec mount.Exec, secret map[string]string) (volume.BlockVolumeMapper, error) {
+	readOnly, _, err := getISCSIVolumeInfo(spec)
+	if err != nil {
+		return nil, err
+	}
+	iscsiDisk, err := createISCSIDisk(spec, podUID, plugin, manager, secret)
+	if err != nil {
+		return nil, err
+	}
+	return &iscsiDiskMapper{
+		iscsiDisk:  iscsiDisk,
+		readOnly:   readOnly,
+		exec:       exec,
+		deviceUtil: ioutil.NewDeviceHandler(ioutil.NewIOHandler()),
+	}, nil
+}
+
+func (plugin *iscsiPlugin) NewUnmounter(volName string, podUID types.UID) (volume.Unmounter, error) {
+	return plugin.newUnmounterInternal(volName, podUID, &ISCSIUtil{}, plugin.host.GetMounter(plugin.GetPluginName()), plugin.host.GetExec(plugin.GetPluginName()))
+}
+
+func (plugin *iscsiPlugin) newUnmounterInternal(volName string, podUID types.UID, manager diskManager, mounter mount.Interface, exec mount.Exec) (volume.Unmounter, error) {
+	return &iscsiDiskUnmounter{
+		iscsiDisk: &iscsiDisk{
+			podUID:          podUID,
+			VolName:         volName,
+			manager:         manager,
+			plugin:          plugin,
+			MetricsProvider: volume.NewMetricsStatFS(plugin.host.GetPodVolumeDir(podUID, utilstrings.EscapeQualifiedNameForDisk(iscsiPluginName), volName)),
+		},
+		mounter: mounter,
+		exec:    exec,
+	}, nil
+}
+
+// NewBlockVolumeUnmapper creates a new volume.BlockVolumeUnmapper from recoverable state.
+func (plugin *iscsiPlugin) NewBlockVolumeUnmapper(volName string, podUID types.UID) (volume.BlockVolumeUnmapper, error) {
+	return plugin.newUnmapperInternal(volName, podUID, &ISCSIUtil{}, plugin.host.GetExec(plugin.GetPluginName()))
+}
+
+func (plugin *iscsiPlugin) newUnmapperInternal(volName string, podUID types.UID, manager diskManager, exec mount.Exec) (volume.BlockVolumeUnmapper, error) {
+	return &iscsiDiskUnmapper{
+		iscsiDisk: &iscsiDisk{
+			podUID:  podUID,
+			VolName: volName,
+			manager: manager,
+			plugin:  plugin,
+		},
+		exec:       exec,
+		deviceUtil: ioutil.NewDeviceHandler(ioutil.NewIOHandler()),
+	}, nil
+}
+
+func (plugin *iscsiPlugin) ConstructVolumeSpec(volumeName, mountPath string) (*volume.Spec, error) {
+	// Find globalPDPath from pod volume directory(mountPath)
+	var globalPDPath string
+	mounter := plugin.host.GetMounter(plugin.GetPluginName())
+	paths, err := mount.GetMountRefs(mounter, mountPath)
+	if err != nil {
+		return nil, err
+	}
+	for _, path := range paths {
+		if strings.Contains(path, plugin.host.GetPluginDir(iscsiPluginName)) {
+			globalPDPath = path
+			break
+		}
+	}
+	// Couldn't fetch globalPDPath
+	if len(globalPDPath) == 0 {
+		return nil, fmt.Errorf("couldn't fetch globalPDPath. failed to obtain volume spec")
+	}
+
+	// Obtain iscsi disk configurations from globalPDPath
+	device, _, err := extractDeviceAndPrefix(globalPDPath)
+	if err != nil {
+		return nil, err
+	}
+	bkpPortal, iqn, err := extractPortalAndIqn(device)
+	if err != nil {
+		return nil, err
+	}
+	iface, _ := extractIface(globalPDPath)
+	iscsiVolume := &v1.Volume{
+		Name: volumeName,
+		VolumeSource: v1.VolumeSource{
+			ISCSI: &v1.ISCSIVolumeSource{
+				TargetPortal:   bkpPortal,
+				IQN:            iqn,
+				ISCSIInterface: iface,
+			},
+		},
+	}
+	return volume.NewSpecFromVolume(iscsiVolume), nil
+}
+
+func (plugin *iscsiPlugin) ConstructBlockVolumeSpec(podUID types.UID, volumeName, mapPath string) (*volume.Spec, error) {
+	pluginDir := plugin.host.GetVolumeDevicePluginDir(iscsiPluginName)
+	blkutil := volumepathhandler.NewBlockVolumePathHandler()
+	globalMapPathUUID, err := blkutil.FindGlobalMapPathUUIDFromPod(pluginDir, mapPath, podUID)
+	if err != nil {
+		return nil, err
+	}
+	glog.V(5).Infof("globalMapPathUUID: %v, err: %v", globalMapPathUUID, err)
+	// Retrieve volume information from globalMapPathUUID
+	// globalMapPathUUID example:
+	// plugins/kubernetes.io/{PluginName}/{DefaultKubeletVolumeDevicesDirName}/{volumePluginDependentPath}/{pod uuid}
+	// plugins/kubernetes.io/iscsi/volumeDevices/iface-default/192.168.0.10:3260-iqn.2017-05.com.example:test-lun-0/{pod uuid}
+	globalMapPath := filepath.Dir(globalMapPathUUID)
+	return getVolumeSpecFromGlobalMapPath(volumeName, globalMapPath)
+}
+
+type iscsiDisk struct {
+	VolName        string
+	podUID         types.UID
+	Portals        []string
+	Iqn            string
+	Lun            string
+	Iface          string
+	chap_discovery bool
+	chap_session   bool
+	secret         map[string]string
+	InitiatorName  string
+	plugin         *iscsiPlugin
+	// Utility interface that provides API calls to the provider to attach/detach disks.
+	manager diskManager
+	volume.MetricsProvider
+}
+
+func (iscsi *iscsiDisk) GetPath() string {
+	name := iscsiPluginName
+	// safe to use PodVolumeDir now: volume teardown occurs before pod is cleaned up
+	return iscsi.plugin.host.GetPodVolumeDir(iscsi.podUID, utilstrings.EscapeQualifiedNameForDisk(name), iscsi.VolName)
+}
+
+func (iscsi *iscsiDisk) iscsiGlobalMapPath(spec *volume.Spec) (string, error) {
+	mounter, err := volumeSpecToMounter(spec, iscsi.plugin.host, nil /* pod */)
+	if err != nil {
+		glog.Warningf("failed to get iscsi mounter: %v", err)
+		return "", err
+	}
+	return iscsi.manager.MakeGlobalVDPDName(*mounter.iscsiDisk), nil
+}
+
+func (iscsi *iscsiDisk) iscsiPodDeviceMapPath() (string, string) {
+	name := iscsiPluginName
+	return iscsi.plugin.host.GetPodVolumeDeviceDir(iscsi.podUID, utilstrings.EscapeQualifiedNameForDisk(name)), iscsi.VolName
+}
+
+type iscsiDiskMounter struct {
+	*iscsiDisk
+	readOnly     bool
+	fsType       string
+	volumeMode   v1.PersistentVolumeMode
+	mounter      *mount.SafeFormatAndMount
+	exec         mount.Exec
+	deviceUtil   ioutil.DeviceUtil
+	mountOptions []string
+}
+
+var _ volume.Mounter = &iscsiDiskMounter{}
+
+func (b *iscsiDiskMounter) GetAttributes() volume.Attributes {
+	return volume.Attributes{
+		ReadOnly:        b.readOnly,
+		Managed:         !b.readOnly,
+		SupportsSELinux: true,
+	}
+}
+
+// Checks prior to mount operations to verify that the required components (binaries, etc.)
+// to mount the volume are available on the underlying node.
+// If not, it returns an error
+func (b *iscsiDiskMounter) CanMount() error {
+	return nil
+}
+
+func (b *iscsiDiskMounter) SetUp(fsGroup *int64) error {
+	return b.SetUpAt(b.GetPath(), fsGroup)
+}
+
+func (b *iscsiDiskMounter) SetUpAt(dir string, fsGroup *int64) error {
+	// diskSetUp checks mountpoints and prevent repeated calls
+	err := diskSetUp(b.manager, *b, dir, b.mounter, fsGroup)
+	if err != nil {
+		glog.Errorf("iscsi: failed to setup")
+	}
+	return err
+}
+
+type iscsiDiskUnmounter struct {
+	*iscsiDisk
+	mounter mount.Interface
+	exec    mount.Exec
+}
+
+var _ volume.Unmounter = &iscsiDiskUnmounter{}
+
+// Unmounts the bind mount, and detaches the disk only if the disk
+// resource was the last reference to that disk on the kubelet.
+func (c *iscsiDiskUnmounter) TearDown() error {
+	return c.TearDownAt(c.GetPath())
+}
+
+func (c *iscsiDiskUnmounter) TearDownAt(dir string) error {
+	return ioutil.UnmountPath(dir, c.mounter)
+}
+
+// Block Volumes Support
+type iscsiDiskMapper struct {
+	*iscsiDisk
+	readOnly   bool
+	exec       mount.Exec
+	deviceUtil ioutil.DeviceUtil
+}
+
+var _ volume.BlockVolumeMapper = &iscsiDiskMapper{}
+
+func (b *iscsiDiskMapper) SetUpDevice() (string, error) {
+	return "", nil
+}
+
+func (b *iscsiDiskMapper) MapDevice(devicePath, globalMapPath, volumeMapPath, volumeMapName string, podUID types.UID) error {
+	return ioutil.MapBlockVolume(devicePath, globalMapPath, volumeMapPath, volumeMapName, podUID)
+}
+
+type iscsiDiskUnmapper struct {
+	*iscsiDisk
+	exec       mount.Exec
+	deviceUtil ioutil.DeviceUtil
+}
+
+var _ volume.BlockVolumeUnmapper = &iscsiDiskUnmapper{}
+
+// Even though iSCSI plugin has attacher/detacher implementation, iSCSI plugin
+// needs volume detach operation during TearDownDevice(). This method is only
+// chance that operations are done on kubelet node during volume teardown sequences.
+func (c *iscsiDiskUnmapper) TearDownDevice(mapPath, _ string) error {
+	err := c.manager.DetachBlockISCSIDisk(*c, mapPath)
+	if err != nil {
+		return fmt.Errorf("iscsi: failed to detach disk: %s\nError: %v", mapPath, err)
+	}
+	glog.V(4).Infof("iscsi: %q is unmounted, deleting the directory", mapPath)
+	err = os.RemoveAll(mapPath)
+	if err != nil {
+		return fmt.Errorf("iscsi: failed to delete the directory: %s\nError: %v", mapPath, err)
+	}
+	glog.V(4).Infof("iscsi: successfully detached disk: %s", mapPath)
+	return nil
+}
+
+// GetGlobalMapPath returns global map path and error
+// path: plugins/kubernetes.io/{PluginName}/volumeDevices/{ifaceName}/{portal-some_iqn-lun-lun_id}
+func (iscsi *iscsiDisk) GetGlobalMapPath(spec *volume.Spec) (string, error) {
+	return iscsi.iscsiGlobalMapPath(spec)
+}
+
+// GetPodDeviceMapPath returns pod device map path and volume name
+// path: pods/{podUid}/volumeDevices/kubernetes.io~iscsi
+// volumeName: pv0001
+func (iscsi *iscsiDisk) GetPodDeviceMapPath() (string, string) {
+	return iscsi.iscsiPodDeviceMapPath()
+}
+
+func portalMounter(portal string) string {
+	if !strings.Contains(portal, ":") {
+		portal = portal + ":3260"
+	}
+	return portal
+}
+
+// get iSCSI volume info: readOnly and fstype
+func getISCSIVolumeInfo(spec *volume.Spec) (bool, string, error) {
+	// for volume source, readonly is in volume spec
+	// for PV, readonly is in PV spec. PV gets the ReadOnly flag indirectly through the PVC source
+	if spec.Volume != nil && spec.Volume.ISCSI != nil {
+		return spec.Volume.ISCSI.ReadOnly, spec.Volume.ISCSI.FSType, nil
+	} else if spec.PersistentVolume != nil &&
+		spec.PersistentVolume.Spec.ISCSI != nil {
+		return spec.ReadOnly, spec.PersistentVolume.Spec.ISCSI.FSType, nil
+	}
+
+	return false, "", fmt.Errorf("Spec does not reference an ISCSI volume type")
+}
+
+// get iSCSI target info: target portal, portals, iqn, and lun
+func getISCSITargetInfo(spec *volume.Spec) (string, []string, string, int32, error) {
+	if spec.Volume != nil && spec.Volume.ISCSI != nil {
+		return spec.Volume.ISCSI.TargetPortal, spec.Volume.ISCSI.Portals, spec.Volume.ISCSI.IQN, spec.Volume.ISCSI.Lun, nil
+	} else if spec.PersistentVolume != nil &&
+		spec.PersistentVolume.Spec.ISCSI != nil {
+		return spec.PersistentVolume.Spec.ISCSI.TargetPortal, spec.PersistentVolume.Spec.ISCSI.Portals, spec.PersistentVolume.Spec.ISCSI.IQN, spec.PersistentVolume.Spec.ISCSI.Lun, nil
+	}
+
+	return "", nil, "", 0, fmt.Errorf("Spec does not reference an ISCSI volume type")
+}
+
+// get iSCSI initiator info: iface and initiator name
+func getISCSIInitiatorInfo(spec *volume.Spec) (string, *string, error) {
+	if spec.Volume != nil && spec.Volume.ISCSI != nil {
+		return spec.Volume.ISCSI.ISCSIInterface, spec.Volume.ISCSI.InitiatorName, nil
+	} else if spec.PersistentVolume != nil &&
+		spec.PersistentVolume.Spec.ISCSI != nil {
+		return spec.PersistentVolume.Spec.ISCSI.ISCSIInterface, spec.PersistentVolume.Spec.ISCSI.InitiatorName, nil
+	}
+
+	return "", nil, fmt.Errorf("Spec does not reference an ISCSI volume type")
+}
+
+// get iSCSI Discovery CHAP boolean
+func getISCSIDiscoveryCHAPInfo(spec *volume.Spec) (bool, error) {
+	if spec.Volume != nil && spec.Volume.ISCSI != nil {
+		return spec.Volume.ISCSI.DiscoveryCHAPAuth, nil
+	} else if spec.PersistentVolume != nil &&
+		spec.PersistentVolume.Spec.ISCSI != nil {
+		return spec.PersistentVolume.Spec.ISCSI.DiscoveryCHAPAuth, nil
+	}
+
+	return false, fmt.Errorf("Spec does not reference an ISCSI volume type")
+}
+
+// get iSCSI Session CHAP boolean
+func getISCSISessionCHAPInfo(spec *volume.Spec) (bool, error) {
+	if spec.Volume != nil && spec.Volume.ISCSI != nil {
+		return spec.Volume.ISCSI.SessionCHAPAuth, nil
+	} else if spec.PersistentVolume != nil &&
+		spec.PersistentVolume.Spec.ISCSI != nil {
+		return spec.PersistentVolume.Spec.ISCSI.SessionCHAPAuth, nil
+	}
+
+	return false, fmt.Errorf("Spec does not reference an ISCSI volume type")
+}
+
+// get iSCSI CHAP Secret info: secret name and namespace
+func getISCSISecretNameAndNamespace(spec *volume.Spec, defaultSecretNamespace string) (string, string, error) {
+	if spec.Volume != nil && spec.Volume.ISCSI != nil {
+		if spec.Volume.ISCSI.SecretRef != nil {
+			return spec.Volume.ISCSI.SecretRef.Name, defaultSecretNamespace, nil
+		}
+		return "", "", nil
+	} else if spec.PersistentVolume != nil &&
+		spec.PersistentVolume.Spec.ISCSI != nil {
+		secretRef := spec.PersistentVolume.Spec.ISCSI.SecretRef
+		secretNs := defaultSecretNamespace
+		if secretRef != nil {
+			if len(secretRef.Namespace) != 0 {
+				secretNs = secretRef.Namespace
+			}
+			return secretRef.Name, secretNs, nil
+		}
+		return "", "", nil
+	}
+
+	return "", "", fmt.Errorf("Spec does not reference an ISCSI volume type")
+}
+
+func createISCSIDisk(spec *volume.Spec, podUID types.UID, plugin *iscsiPlugin, manager diskManager, secret map[string]string) (*iscsiDisk, error) {
+	tp, portals, iqn, lunStr, err := getISCSITargetInfo(spec)
+	if err != nil {
+		return nil, err
+	}
+
+	lun := strconv.Itoa(int(lunStr))
+	portal := portalMounter(tp)
+	var bkportal []string
+	bkportal = append(bkportal, portal)
+	for _, p := range portals {
+		bkportal = append(bkportal, portalMounter(string(p)))
+	}
+
+	iface, initiatorNamePtr, err := getISCSIInitiatorInfo(spec)
+	if err != nil {
+		return nil, err
+	}
+
+	var initiatorName string
+	if initiatorNamePtr != nil {
+		initiatorName = *initiatorNamePtr
+	}
+	chapDiscovery, err := getISCSIDiscoveryCHAPInfo(spec)
+	if err != nil {
+		return nil, err
+	}
+	chapSession, err := getISCSISessionCHAPInfo(spec)
+	if err != nil {
+		return nil, err
+	}
+
+	return &iscsiDisk{
+		podUID:         podUID,
+		VolName:        spec.Name(),
+		Portals:        bkportal,
+		Iqn:            iqn,
+		Lun:            lun,
+		Iface:          iface,
+		chap_discovery: chapDiscovery,
+		chap_session:   chapSession,
+		secret:         secret,
+		InitiatorName:  initiatorName,
+		manager:        manager,
+		plugin:         plugin}, nil
+}
+
+func createSecretMap(spec *volume.Spec, plugin *iscsiPlugin, namespace string) (map[string]string, error) {
+	var secret map[string]string
+	chapDiscover, err := getISCSIDiscoveryCHAPInfo(spec)
+	if err != nil {
+		return nil, err
+	}
+	chapSession, err := getISCSISessionCHAPInfo(spec)
+	if err != nil {
+		return nil, err
+	}
+	if chapDiscover || chapSession {
+		secretName, secretNamespace, err := getISCSISecretNameAndNamespace(spec, namespace)
+		if err != nil {
+			return nil, err
+		}
+
+		if len(secretName) > 0 && len(secretNamespace) > 0 {
+			// if secret is provideded, retrieve it
+			kubeClient := plugin.host.GetKubeClient()
+			if kubeClient == nil {
+				return nil, fmt.Errorf("Cannot get kube client")
+			}
+			secretObj, err := kubeClient.CoreV1().Secrets(secretNamespace).Get(secretName, metav1.GetOptions{})
+			if err != nil {
+				err = fmt.Errorf("Couldn't get secret %v/%v error: %v", secretNamespace, secretName, err)
+				return nil, err
+			}
+			secret = make(map[string]string)
+			for name, data := range secretObj.Data {
+				glog.V(4).Infof("retrieving CHAP secret name: %s", name)
+				secret[name] = string(data)
+			}
+		}
+	}
+	return secret, err
+}
+
+func createVolumeFromISCSIVolumeSource(volumeName string, iscsi v1.ISCSIVolumeSource) *v1.Volume {
+	return &v1.Volume{
+		Name: volumeName,
+		VolumeSource: v1.VolumeSource{
+			ISCSI: &iscsi,
+		},
+	}
+}
+
+func createPersistentVolumeFromISCSIPVSource(volumeName string, iscsi v1.ISCSIPersistentVolumeSource) *v1.PersistentVolume {
+	block := v1.PersistentVolumeBlock
+	return &v1.PersistentVolume{
+		ObjectMeta: metav1.ObjectMeta{
+			Name: volumeName,
+		},
+		Spec: v1.PersistentVolumeSpec{
+			PersistentVolumeSource: v1.PersistentVolumeSource{
+				ISCSI: &iscsi,
+			},
+			VolumeMode: &block,
+		},
+	}
+}
+
+func getVolumeSpecFromGlobalMapPath(volumeName, globalMapPath string) (*volume.Spec, error) {
+	// Retrieve volume spec information from globalMapPath
+	// globalMapPath example:
+	// plugins/kubernetes.io/{PluginName}/{DefaultKubeletVolumeDevicesDirName}/{volumePluginDependentPath}
+	// plugins/kubernetes.io/iscsi/volumeDevices/iface-default/192.168.0.10:3260-iqn.2017-05.com.example:test-lun-0
+
+	// device: 192.168.0.10:3260-iqn.2017-05.com.example:test-lun-0
+	device, _, err := extractDeviceAndPrefix(globalMapPath)
+	if err != nil {
+		return nil, err
+	}
+	bkpPortal, iqn, err := extractPortalAndIqn(device)
+	if err != nil {
+		return nil, err
+	}
+	arr := strings.Split(device, "-lun-")
+	if len(arr) < 2 {
+		return nil, fmt.Errorf("failed to retrieve lun from globalMapPath: %v", globalMapPath)
+	}
+	lun, err := strconv.Atoi(arr[1])
+	if err != nil {
+		return nil, err
+	}
+	iface, found := extractIface(globalMapPath)
+	if !found {
+		return nil, fmt.Errorf("failed to retrieve iface from globalMapPath: %v", globalMapPath)
+	}
+	iscsiPV := createPersistentVolumeFromISCSIPVSource(volumeName,
+		v1.ISCSIPersistentVolumeSource{
+			TargetPortal:   bkpPortal,
+			IQN:            iqn,
+			Lun:            int32(lun),
+			ISCSIInterface: iface,
+		},
+	)
+	glog.V(5).Infof("ConstructBlockVolumeSpec: TargetPortal: %v, IQN: %v, Lun: %v, ISCSIInterface: %v",
+		iscsiPV.Spec.PersistentVolumeSource.ISCSI.TargetPortal,
+		iscsiPV.Spec.PersistentVolumeSource.ISCSI.IQN,
+		iscsiPV.Spec.PersistentVolumeSource.ISCSI.Lun,
+		iscsiPV.Spec.PersistentVolumeSource.ISCSI.ISCSIInterface,
+	)
+	return volume.NewSpecFromPersistentVolume(iscsiPV, false), nil
+}

vendor/k8s.io/kubernetes/pkg/volume/iscsi/iscsi_test.go

@@ -0,0 +1,553 @@
+/*
+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 iscsi
+
+import (
+	"fmt"
+	"os"
+	"strings"
+	"testing"
+
+	"k8s.io/api/core/v1"
+	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+	"k8s.io/apimachinery/pkg/types"
+	"k8s.io/client-go/kubernetes/fake"
+	utiltesting "k8s.io/client-go/util/testing"
+	"k8s.io/kubernetes/pkg/util/mount"
+	"k8s.io/kubernetes/pkg/volume"
+	volumetest "k8s.io/kubernetes/pkg/volume/testing"
+)
+
+func TestCanSupport(t *testing.T) {
+	tmpDir, err := utiltesting.MkTmpdir("iscsi_test")
+	if err != nil {
+		t.Fatalf("error creating temp dir: %v", err)
+	}
+	defer os.RemoveAll(tmpDir)
+
+	plugMgr := volume.VolumePluginMgr{}
+	plugMgr.InitPlugins(ProbeVolumePlugins(), nil /* prober */, volumetest.NewFakeVolumeHost(tmpDir, nil, nil))
+
+	plug, err := plugMgr.FindPluginByName("kubernetes.io/iscsi")
+	if err != nil {
+		t.Errorf("Can't find the plugin by name")
+	}
+	if plug.GetPluginName() != "kubernetes.io/iscsi" {
+		t.Errorf("Wrong name: %s", plug.GetPluginName())
+	}
+	if plug.CanSupport(&volume.Spec{Volume: &v1.Volume{VolumeSource: v1.VolumeSource{}}}) {
+		t.Errorf("Expected false")
+	}
+	if plug.CanSupport(&volume.Spec{}) {
+		t.Errorf("Expected false")
+	}
+	if !plug.CanSupport(&volume.Spec{Volume: &v1.Volume{VolumeSource: v1.VolumeSource{ISCSI: &v1.ISCSIVolumeSource{}}}}) {
+		t.Errorf("Expected true")
+	}
+	if plug.CanSupport(&volume.Spec{PersistentVolume: &v1.PersistentVolume{Spec: v1.PersistentVolumeSpec{}}}) {
+		t.Errorf("Expected false")
+	}
+	if plug.CanSupport(&volume.Spec{PersistentVolume: &v1.PersistentVolume{Spec: v1.PersistentVolumeSpec{PersistentVolumeSource: v1.PersistentVolumeSource{}}}}) {
+		t.Errorf("Expected false")
+	}
+	if !plug.CanSupport(&volume.Spec{PersistentVolume: &v1.PersistentVolume{Spec: v1.PersistentVolumeSpec{PersistentVolumeSource: v1.PersistentVolumeSource{ISCSI: &v1.ISCSIPersistentVolumeSource{}}}}}) {
+		t.Errorf("Expected true")
+	}
+}
+
+func TestGetAccessModes(t *testing.T) {
+	tmpDir, err := utiltesting.MkTmpdir("iscsi_test")
+	if err != nil {
+		t.Fatalf("error creating temp dir: %v", err)
+	}
+	defer os.RemoveAll(tmpDir)
+
+	plugMgr := volume.VolumePluginMgr{}
+	plugMgr.InitPlugins(ProbeVolumePlugins(), nil /* prober */, volumetest.NewFakeVolumeHost(tmpDir, nil, nil))
+
+	plug, err := plugMgr.FindPersistentPluginByName("kubernetes.io/iscsi")
+	if err != nil {
+		t.Errorf("Can't find the plugin by name")
+	}
+	if !volumetest.ContainsAccessMode(plug.GetAccessModes(), v1.ReadWriteOnce) || !volumetest.ContainsAccessMode(plug.GetAccessModes(), v1.ReadOnlyMany) {
+		t.Errorf("Expected two AccessModeTypes:  %s and %s", v1.ReadWriteOnce, v1.ReadOnlyMany)
+	}
+}
+
+type fakeDiskManager struct {
+	tmpDir       string
+	attachCalled bool
+	detachCalled bool
+}
+
+func NewFakeDiskManager() *fakeDiskManager {
+	return &fakeDiskManager{
+		tmpDir: utiltesting.MkTmpdirOrDie("iscsi_test"),
+	}
+}
+
+func (fake *fakeDiskManager) Cleanup() {
+	os.RemoveAll(fake.tmpDir)
+}
+
+func (fake *fakeDiskManager) MakeGlobalPDName(disk iscsiDisk) string {
+	return fake.tmpDir
+}
+
+func (fake *fakeDiskManager) MakeGlobalVDPDName(disk iscsiDisk) string {
+	return fake.tmpDir
+}
+
+func (fake *fakeDiskManager) AttachDisk(b iscsiDiskMounter) (string, error) {
+	globalPath := b.manager.MakeGlobalPDName(*b.iscsiDisk)
+	err := os.MkdirAll(globalPath, 0750)
+	if err != nil {
+		return "", err
+	}
+	// Simulate the global mount so that the fakeMounter returns the
+	// expected number of mounts for the attached disk.
+	b.mounter.Mount(globalPath, globalPath, b.fsType, nil)
+
+	return "/dev/sdb", nil
+}
+
+func (fake *fakeDiskManager) DetachDisk(c iscsiDiskUnmounter, mntPath string) error {
+	globalPath := c.manager.MakeGlobalPDName(*c.iscsiDisk)
+	err := os.RemoveAll(globalPath)
+	if err != nil {
+		return err
+	}
+	return nil
+}
+
+func (fake *fakeDiskManager) DetachBlockISCSIDisk(c iscsiDiskUnmapper, mntPath string) error {
+	globalPath := c.manager.MakeGlobalVDPDName(*c.iscsiDisk)
+	err := os.RemoveAll(globalPath)
+	if err != nil {
+		return err
+	}
+	return nil
+}
+
+func doTestPlugin(t *testing.T, spec *volume.Spec) {
+	tmpDir, err := utiltesting.MkTmpdir("iscsi_test")
+	if err != nil {
+		t.Fatalf("error creating temp dir: %v", err)
+	}
+	defer os.RemoveAll(tmpDir)
+
+	plugMgr := volume.VolumePluginMgr{}
+	plugMgr.InitPlugins(ProbeVolumePlugins(), nil /* prober */, volumetest.NewFakeVolumeHost(tmpDir, nil, nil))
+
+	plug, err := plugMgr.FindPluginByName("kubernetes.io/iscsi")
+	if err != nil {
+		t.Errorf("Can't find the plugin by name")
+	}
+	fakeManager := NewFakeDiskManager()
+	defer fakeManager.Cleanup()
+	fakeMounter := &mount.FakeMounter{}
+	fakeExec := mount.NewFakeExec(nil)
+	mounter, err := plug.(*iscsiPlugin).newMounterInternal(spec, types.UID("poduid"), fakeManager, fakeMounter, fakeExec, nil)
+	if err != nil {
+		t.Errorf("Failed to make a new Mounter: %v", err)
+	}
+	if mounter == nil {
+		t.Error("Got a nil Mounter")
+	}
+
+	path := mounter.GetPath()
+	expectedPath := fmt.Sprintf("%s/pods/poduid/volumes/kubernetes.io~iscsi/vol1", tmpDir)
+	if path != expectedPath {
+		t.Errorf("Unexpected path, expected %q, got: %q", expectedPath, path)
+	}
+
+	if err := mounter.SetUp(nil); err != nil {
+		t.Errorf("Expected success, got: %v", err)
+	}
+	if _, err := os.Stat(path); err != nil {
+		if os.IsNotExist(err) {
+			t.Errorf("SetUp() failed, volume path not created: %s", path)
+		} else {
+			t.Errorf("SetUp() failed: %v", err)
+		}
+	}
+
+	fakeManager2 := NewFakeDiskManager()
+	defer fakeManager2.Cleanup()
+	unmounter, err := plug.(*iscsiPlugin).newUnmounterInternal("vol1", types.UID("poduid"), fakeManager2, fakeMounter, fakeExec)
+	if err != nil {
+		t.Errorf("Failed to make a new Unmounter: %v", err)
+	}
+	if unmounter == nil {
+		t.Error("Got a nil Unmounter")
+	}
+
+	if err := unmounter.TearDown(); err != nil {
+		t.Errorf("Expected success, got: %v", err)
+	}
+	if _, err := os.Stat(path); err == nil {
+		t.Errorf("TearDown() failed, volume path still exists: %s", path)
+	} else if !os.IsNotExist(err) {
+		t.Errorf("TearDown() failed: %v", err)
+	}
+}
+
+func TestPluginVolume(t *testing.T) {
+	vol := &v1.Volume{
+		Name: "vol1",
+		VolumeSource: v1.VolumeSource{
+			ISCSI: &v1.ISCSIVolumeSource{
+				TargetPortal: "127.0.0.1:3260",
+				IQN:          "iqn.2014-12.server:storage.target01",
+				FSType:       "ext4",
+				Lun:          0,
+			},
+		},
+	}
+	doTestPlugin(t, volume.NewSpecFromVolume(vol))
+}
+
+func TestPluginPersistentVolume(t *testing.T) {
+	vol := &v1.PersistentVolume{
+		ObjectMeta: metav1.ObjectMeta{
+			Name: "vol1",
+		},
+		Spec: v1.PersistentVolumeSpec{
+			PersistentVolumeSource: v1.PersistentVolumeSource{
+				ISCSI: &v1.ISCSIPersistentVolumeSource{
+					TargetPortal: "127.0.0.1:3260",
+					IQN:          "iqn.2014-12.server:storage.target01",
+					FSType:       "ext4",
+					Lun:          0,
+				},
+			},
+		},
+	}
+	doTestPlugin(t, volume.NewSpecFromPersistentVolume(vol, false))
+}
+
+func TestPersistentClaimReadOnlyFlag(t *testing.T) {
+	tmpDir, err := utiltesting.MkTmpdir("iscsi_test")
+	if err != nil {
+		t.Fatalf("error creating temp dir: %v", err)
+	}
+	defer os.RemoveAll(tmpDir)
+
+	pv := &v1.PersistentVolume{
+		ObjectMeta: metav1.ObjectMeta{
+			Name: "pvA",
+		},
+		Spec: v1.PersistentVolumeSpec{
+			PersistentVolumeSource: v1.PersistentVolumeSource{
+				ISCSI: &v1.ISCSIPersistentVolumeSource{
+					TargetPortal: "127.0.0.1:3260",
+					IQN:          "iqn.2014-12.server:storage.target01",
+					FSType:       "ext4",
+					Lun:          0,
+				},
+			},
+			ClaimRef: &v1.ObjectReference{
+				Name: "claimA",
+			},
+		},
+	}
+
+	claim := &v1.PersistentVolumeClaim{
+		ObjectMeta: metav1.ObjectMeta{
+			Name:      "claimA",
+			Namespace: "nsA",
+		},
+		Spec: v1.PersistentVolumeClaimSpec{
+			VolumeName: "pvA",
+		},
+		Status: v1.PersistentVolumeClaimStatus{
+			Phase: v1.ClaimBound,
+		},
+	}
+
+	client := fake.NewSimpleClientset(pv, claim)
+
+	plugMgr := volume.VolumePluginMgr{}
+	plugMgr.InitPlugins(ProbeVolumePlugins(), nil /* prober */, volumetest.NewFakeVolumeHost(tmpDir, client, nil))
+	plug, _ := plugMgr.FindPluginByName(iscsiPluginName)
+
+	// readOnly bool is supplied by persistent-claim volume source when its mounter creates other volumes
+	spec := volume.NewSpecFromPersistentVolume(pv, true)
+	pod := &v1.Pod{ObjectMeta: metav1.ObjectMeta{UID: types.UID("poduid")}}
+	mounter, _ := plug.NewMounter(spec, pod, volume.VolumeOptions{})
+	if mounter == nil {
+		t.Fatalf("Got a nil Mounter")
+	}
+
+	if !mounter.GetAttributes().ReadOnly {
+		t.Errorf("Expected true for mounter.IsReadOnly")
+	}
+}
+
+func TestPortalMounter(t *testing.T) {
+	if portal := portalMounter("127.0.0.1"); portal != "127.0.0.1:3260" {
+		t.Errorf("wrong portal: %s", portal)
+	}
+	if portal := portalMounter("127.0.0.1:3260"); portal != "127.0.0.1:3260" {
+		t.Errorf("wrong portal: %s", portal)
+	}
+}
+
+type testcase struct {
+	name      string
+	defaultNs string
+	spec      *volume.Spec
+	// Expected return of the test
+	expectedName          string
+	expectedNs            string
+	expectedIface         string
+	expectedError         error
+	expectedDiscoveryCHAP bool
+	expectedSessionCHAP   bool
+}
+
+func TestGetSecretNameAndNamespaceForPV(t *testing.T) {
+	tests := []testcase{
+		{
+			name:      "persistent volume source",
+			defaultNs: "default",
+			spec: &volume.Spec{
+				PersistentVolume: &v1.PersistentVolume{
+					Spec: v1.PersistentVolumeSpec{
+						PersistentVolumeSource: v1.PersistentVolumeSource{
+							ISCSI: &v1.ISCSIPersistentVolumeSource{
+								TargetPortal: "127.0.0.1:3260",
+								IQN:          "iqn.2014-12.server:storage.target01",
+								FSType:       "ext4",
+								Lun:          0,
+								SecretRef: &v1.SecretReference{
+									Name:      "name",
+									Namespace: "ns",
+								},
+							},
+						},
+					},
+				},
+			},
+			expectedName:  "name",
+			expectedNs:    "ns",
+			expectedError: nil,
+		},
+		{
+			name:      "persistent volume source without namespace",
+			defaultNs: "default",
+			spec: &volume.Spec{
+				PersistentVolume: &v1.PersistentVolume{
+					Spec: v1.PersistentVolumeSpec{
+						PersistentVolumeSource: v1.PersistentVolumeSource{
+							ISCSI: &v1.ISCSIPersistentVolumeSource{
+								TargetPortal: "127.0.0.1:3260",
+								IQN:          "iqn.2014-12.server:storage.target01",
+								FSType:       "ext4",
+								Lun:          0,
+								SecretRef: &v1.SecretReference{
+									Name: "name",
+								},
+							},
+						},
+					},
+				},
+			},
+			expectedName:  "name",
+			expectedNs:    "default",
+			expectedError: nil,
+		},
+		{
+			name:      "pod volume source",
+			defaultNs: "default",
+			spec: &volume.Spec{
+				Volume: &v1.Volume{
+					VolumeSource: v1.VolumeSource{
+						ISCSI: &v1.ISCSIVolumeSource{
+							TargetPortal: "127.0.0.1:3260",
+							IQN:          "iqn.2014-12.server:storage.target01",
+							FSType:       "ext4",
+							Lun:          0,
+						},
+					},
+				},
+			},
+			expectedName:  "",
+			expectedNs:    "",
+			expectedError: nil,
+		},
+	}
+	for _, testcase := range tests {
+		resultName, resultNs, err := getISCSISecretNameAndNamespace(testcase.spec, testcase.defaultNs)
+		if err != testcase.expectedError || resultName != testcase.expectedName || resultNs != testcase.expectedNs {
+			t.Errorf("%s failed: expected err=%v ns=%q name=%q, got %v/%q/%q", testcase.name, testcase.expectedError, testcase.expectedNs, testcase.expectedName,
+				err, resultNs, resultName)
+		}
+	}
+
+}
+
+func TestGetISCSIInitiatorInfo(t *testing.T) {
+	tests := []testcase{
+		{
+			name: "persistent volume source",
+			spec: &volume.Spec{
+				PersistentVolume: &v1.PersistentVolume{
+					Spec: v1.PersistentVolumeSpec{
+						PersistentVolumeSource: v1.PersistentVolumeSource{
+							ISCSI: &v1.ISCSIPersistentVolumeSource{
+								TargetPortal:   "127.0.0.1:3260",
+								IQN:            "iqn.2014-12.server:storage.target01",
+								FSType:         "ext4",
+								Lun:            0,
+								ISCSIInterface: "tcp",
+							},
+						},
+					},
+				},
+			},
+			expectedIface: "tcp",
+			expectedError: nil,
+		},
+		{
+			name: "pod volume source",
+			spec: &volume.Spec{
+				Volume: &v1.Volume{
+					VolumeSource: v1.VolumeSource{
+						ISCSI: &v1.ISCSIVolumeSource{
+							TargetPortal:   "127.0.0.1:3260",
+							IQN:            "iqn.2014-12.server:storage.target01",
+							FSType:         "ext4",
+							Lun:            0,
+							ISCSIInterface: "tcp",
+						},
+					},
+				},
+			},
+			expectedIface: "tcp",
+			expectedError: nil,
+		},
+	}
+	for _, testcase := range tests {
+		resultIface, _, err := getISCSIInitiatorInfo(testcase.spec)
+		if err != testcase.expectedError || resultIface != testcase.expectedIface {
+			t.Errorf("%s failed: expected err=%v iface=%s, got %v/%s", testcase.name, testcase.expectedError, testcase.expectedIface,
+				err, resultIface)
+		}
+	}
+}
+
+func TestGetISCSICHAP(t *testing.T) {
+	tests := []testcase{
+		{
+			name: "persistent volume source",
+			spec: &volume.Spec{
+				PersistentVolume: &v1.PersistentVolume{
+					Spec: v1.PersistentVolumeSpec{
+						PersistentVolumeSource: v1.PersistentVolumeSource{
+							ISCSI: &v1.ISCSIPersistentVolumeSource{
+								DiscoveryCHAPAuth: true,
+								SessionCHAPAuth:   true,
+							},
+						},
+					},
+				},
+			},
+			expectedDiscoveryCHAP: true,
+			expectedSessionCHAP:   true,
+			expectedError:         nil,
+		},
+		{
+			name: "pod volume source",
+			spec: &volume.Spec{
+				Volume: &v1.Volume{
+					VolumeSource: v1.VolumeSource{
+						ISCSI: &v1.ISCSIVolumeSource{
+							DiscoveryCHAPAuth: true,
+							SessionCHAPAuth:   true,
+						},
+					},
+				},
+			},
+			expectedDiscoveryCHAP: true,
+			expectedSessionCHAP:   true,
+			expectedError:         nil,
+		},
+		{
+			name: "no volume",
+			spec: &volume.Spec{},
+			expectedDiscoveryCHAP: false,
+			expectedSessionCHAP:   false,
+			expectedError:         fmt.Errorf("Spec does not reference an ISCSI volume type"),
+		},
+	}
+	for _, testcase := range tests {
+		resultDiscoveryCHAP, err := getISCSIDiscoveryCHAPInfo(testcase.spec)
+		resultSessionCHAP, err := getISCSISessionCHAPInfo(testcase.spec)
+		switch testcase.name {
+		case "no volume":
+			if err.Error() != testcase.expectedError.Error() || resultDiscoveryCHAP != testcase.expectedDiscoveryCHAP || resultSessionCHAP != testcase.expectedSessionCHAP {
+				t.Errorf("%s failed: expected err=%v DiscoveryCHAP=%v SessionCHAP=%v, got %v/%v/%v",
+					testcase.name, testcase.expectedError, testcase.expectedDiscoveryCHAP, testcase.expectedSessionCHAP,
+					err, resultDiscoveryCHAP, resultSessionCHAP)
+			}
+		default:
+			if err != testcase.expectedError || resultDiscoveryCHAP != testcase.expectedDiscoveryCHAP || resultSessionCHAP != testcase.expectedSessionCHAP {
+				t.Errorf("%s failed: expected err=%v DiscoveryCHAP=%v SessionCHAP=%v, got %v/%v/%v", testcase.name, testcase.expectedError, testcase.expectedDiscoveryCHAP, testcase.expectedSessionCHAP,
+					err, resultDiscoveryCHAP, resultSessionCHAP)
+			}
+		}
+	}
+}
+
+func TestGetVolumeSpec(t *testing.T) {
+	path := "plugins/kubernetes.io/iscsi/volumeDevices/iface-default/127.0.0.1:3260-iqn.2014-12.server:storage.target01-lun-0"
+	spec, _ := getVolumeSpecFromGlobalMapPath("test", path)
+
+	portal := spec.PersistentVolume.Spec.PersistentVolumeSource.ISCSI.TargetPortal
+	if portal != "127.0.0.1:3260" {
+		t.Errorf("wrong portal: %v", portal)
+	}
+	iqn := spec.PersistentVolume.Spec.PersistentVolumeSource.ISCSI.IQN
+	if iqn != "iqn.2014-12.server:storage.target01" {
+		t.Errorf("wrong iqn: %v", iqn)
+	}
+	lun := spec.PersistentVolume.Spec.PersistentVolumeSource.ISCSI.Lun
+	if lun != 0 {
+		t.Errorf("wrong lun: %v", lun)
+	}
+	iface := spec.PersistentVolume.Spec.PersistentVolumeSource.ISCSI.ISCSIInterface
+	if iface != "default" {
+		t.Errorf("wrong ISCSIInterface: %v", iface)
+	}
+}
+
+func TestGetVolumeSpec_no_lun(t *testing.T) {
+	path := "plugins/kubernetes.io/iscsi/volumeDevices/iface-default/127.0.0.1:3260-iqn.2014-12.server:storage.target01"
+	_, err := getVolumeSpecFromGlobalMapPath("test", path)
+	if !strings.Contains(err.Error(), "malformatted mnt path") {
+		t.Errorf("should get error: malformatted mnt path")
+	}
+}
+
+func TestGetVolumeSpec_no_iface(t *testing.T) {
+	path := "plugins/kubernetes.io/iscsi/volumeDevices/default/127.0.0.1:3260-iqn.2014-12.server:storage.target01-lun-0"
+	_, err := getVolumeSpecFromGlobalMapPath("test", path)
+	if !strings.Contains(err.Error(), "failed to retrieve iface") {
+		t.Errorf("should get error: failed to retrieve iface")
+	}
+}

vendor/k8s.io/kubernetes/pkg/volume/iscsi/iscsi_util.go

@@ -0,0 +1,694 @@
+/*
+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 iscsi
+
+import (
+	"encoding/json"
+	"fmt"
+	"os"
+	"path"
+	"path/filepath"
+	"regexp"
+	"strings"
+	"time"
+
+	"github.com/golang/glog"
+	"k8s.io/api/core/v1"
+	utilfeature "k8s.io/apiserver/pkg/util/feature"
+	"k8s.io/kubernetes/pkg/features"
+	"k8s.io/kubernetes/pkg/util/mount"
+	"k8s.io/kubernetes/pkg/volume"
+	volumeutil "k8s.io/kubernetes/pkg/volume/util"
+	"k8s.io/kubernetes/pkg/volume/util/volumepathhandler"
+)
+
+var (
+	chap_st = []string{
+		"discovery.sendtargets.auth.username",
+		"discovery.sendtargets.auth.password",
+		"discovery.sendtargets.auth.username_in",
+		"discovery.sendtargets.auth.password_in"}
+	chap_sess = []string{
+		"node.session.auth.username",
+		"node.session.auth.password",
+		"node.session.auth.username_in",
+		"node.session.auth.password_in"}
+	ifaceTransportNameRe = regexp.MustCompile(`iface.transport_name = (.*)\n`)
+	ifaceRe              = regexp.MustCompile(`.+/iface-([^/]+)/.+`)
+)
+
+func updateISCSIDiscoverydb(b iscsiDiskMounter, tp string) error {
+	if !b.chap_discovery {
+		return nil
+	}
+	out, err := b.exec.Run("iscsiadm", "-m", "discoverydb", "-t", "sendtargets", "-p", tp, "-I", b.Iface, "-o", "update", "-n", "discovery.sendtargets.auth.authmethod", "-v", "CHAP")
+	if err != nil {
+		return fmt.Errorf("iscsi: failed to update discoverydb with CHAP, output: %v", string(out))
+	}
+
+	for _, k := range chap_st {
+		v := b.secret[k]
+		if len(v) > 0 {
+			out, err := b.exec.Run("iscsiadm", "-m", "discoverydb", "-t", "sendtargets", "-p", tp, "-I", b.Iface, "-o", "update", "-n", k, "-v", v)
+			if err != nil {
+				return fmt.Errorf("iscsi: failed to update discoverydb key %q with value %q error: %v", k, v, string(out))
+			}
+		}
+	}
+	return nil
+}
+
+func updateISCSINode(b iscsiDiskMounter, tp string) error {
+	if !b.chap_session {
+		return nil
+	}
+
+	out, err := b.exec.Run("iscsiadm", "-m", "node", "-p", tp, "-T", b.Iqn, "-I", b.Iface, "-o", "update", "-n", "node.session.auth.authmethod", "-v", "CHAP")
+	if err != nil {
+		return fmt.Errorf("iscsi: failed to update node with CHAP, output: %v", string(out))
+	}
+
+	for _, k := range chap_sess {
+		v := b.secret[k]
+		if len(v) > 0 {
+			out, err := b.exec.Run("iscsiadm", "-m", "node", "-p", tp, "-T", b.Iqn, "-I", b.Iface, "-o", "update", "-n", k, "-v", v)
+			if err != nil {
+				return fmt.Errorf("iscsi: failed to update node session key %q with value %q error: %v", k, v, string(out))
+			}
+		}
+	}
+	return nil
+}
+
+// stat a path, if not exists, retry maxRetries times
+// when iscsi transports other than default are used,  use glob instead as pci id of device is unknown
+type StatFunc func(string) (os.FileInfo, error)
+type GlobFunc func(string) ([]string, error)
+
+func waitForPathToExist(devicePath *string, maxRetries int, deviceTransport string) bool {
+	// This makes unit testing a lot easier
+	return waitForPathToExistInternal(devicePath, maxRetries, deviceTransport, os.Stat, filepath.Glob)
+}
+
+func waitForPathToExistInternal(devicePath *string, maxRetries int, deviceTransport string, osStat StatFunc, filepathGlob GlobFunc) bool {
+	if devicePath == nil {
+		return false
+	}
+
+	for i := 0; i < maxRetries; i++ {
+		var err error
+		if deviceTransport == "tcp" {
+			_, err = osStat(*devicePath)
+		} else {
+			fpath, _ := filepathGlob(*devicePath)
+			if fpath == nil {
+				err = os.ErrNotExist
+			} else {
+				// There might be a case that fpath contains multiple device paths if
+				// multiple PCI devices connect to same iscsi target. We handle this
+				// case at subsequent logic. Pick up only first path here.
+				*devicePath = fpath[0]
+			}
+		}
+		if err == nil {
+			return true
+		}
+		if !os.IsNotExist(err) {
+			return false
+		}
+		if i == maxRetries-1 {
+			break
+		}
+		time.Sleep(time.Second)
+	}
+	return false
+}
+
+// getDevicePrefixRefCount: given a prefix of device path, find its reference count from /proc/mounts
+// returns the reference count to the device and error code
+// for services like iscsi construct multiple device paths with the same prefix pattern.
+// this function aggregates all references to a service based on the prefix pattern
+// More specifically, this prefix semantics is to aggregate disk paths that belong to the same iSCSI target/iqn pair.
+// an iSCSI target could expose multiple LUNs through the same IQN, and Linux iSCSI initiator creates disk paths that start the same prefix but end with different LUN number
+// When we decide whether it is time to logout a target, we have to see if none of the LUNs are used any more.
+// That's where the prefix based ref count kicks in. If we only count the disks using exact match, we could log other disks out.
+func getDevicePrefixRefCount(mounter mount.Interface, deviceNamePrefix string) (int, error) {
+	mps, err := mounter.List()
+	if err != nil {
+		return -1, err
+	}
+
+	// Find the number of references to the device.
+	refCount := 0
+	for i := range mps {
+		if strings.HasPrefix(mps[i].Path, deviceNamePrefix) {
+			refCount++
+		}
+	}
+	return refCount, nil
+}
+
+// make a directory like /var/lib/kubelet/plugins/kubernetes.io/iscsi/iface_name/portal-some_iqn-lun-lun_id
+func makePDNameInternal(host volume.VolumeHost, portal string, iqn string, lun string, iface string) string {
+	return path.Join(host.GetPluginDir(iscsiPluginName), "iface-"+iface, portal+"-"+iqn+"-lun-"+lun)
+}
+
+// make a directory like /var/lib/kubelet/plugins/kubernetes.io/iscsi/volumeDevices/iface_name/portal-some_iqn-lun-lun_id
+func makeVDPDNameInternal(host volume.VolumeHost, portal string, iqn string, lun string, iface string) string {
+	return path.Join(host.GetVolumeDevicePluginDir(iscsiPluginName), "iface-"+iface, portal+"-"+iqn+"-lun-"+lun)
+}
+
+type ISCSIUtil struct{}
+
+// MakeGlobalPDName returns path of global plugin dir
+func (util *ISCSIUtil) MakeGlobalPDName(iscsi iscsiDisk) string {
+	return makePDNameInternal(iscsi.plugin.host, iscsi.Portals[0], iscsi.Iqn, iscsi.Lun, iscsi.Iface)
+}
+
+// MakeGlobalVDPDName returns path of global volume device plugin dir
+func (util *ISCSIUtil) MakeGlobalVDPDName(iscsi iscsiDisk) string {
+	return makeVDPDNameInternal(iscsi.plugin.host, iscsi.Portals[0], iscsi.Iqn, iscsi.Lun, iscsi.Iface)
+}
+
+func (util *ISCSIUtil) persistISCSI(conf iscsiDisk, mnt string) error {
+	file := path.Join(mnt, "iscsi.json")
+	fp, err := os.Create(file)
+	if err != nil {
+		return fmt.Errorf("iscsi: create %s err %s", file, err)
+	}
+	defer fp.Close()
+	encoder := json.NewEncoder(fp)
+	if err = encoder.Encode(conf); err != nil {
+		return fmt.Errorf("iscsi: encode err: %v.", err)
+	}
+	return nil
+}
+
+func (util *ISCSIUtil) loadISCSI(conf *iscsiDisk, mnt string) error {
+	file := path.Join(mnt, "iscsi.json")
+	fp, err := os.Open(file)
+	if err != nil {
+		return fmt.Errorf("iscsi: open %s err %s", file, err)
+	}
+	defer fp.Close()
+	decoder := json.NewDecoder(fp)
+	if err = decoder.Decode(conf); err != nil {
+		return fmt.Errorf("iscsi: decode err: %v.", err)
+	}
+	return nil
+}
+
+// AttachDisk returns devicePath of volume if attach succeeded otherwise returns error
+func (util *ISCSIUtil) AttachDisk(b iscsiDiskMounter) (string, error) {
+	var devicePath string
+	var devicePaths []string
+	var iscsiTransport string
+	var lastErr error
+
+	out, err := b.exec.Run("iscsiadm", "-m", "iface", "-I", b.Iface, "-o", "show")
+	if err != nil {
+		glog.Errorf("iscsi: could not read iface %s error: %s", b.Iface, string(out))
+		return "", err
+	}
+
+	iscsiTransport = extractTransportname(string(out))
+
+	bkpPortal := b.Portals
+
+	// create new iface and copy parameters from pre-configured iface to the created iface
+	if b.InitiatorName != "" {
+		// new iface name is <target portal>:<volume name>
+		newIface := bkpPortal[0] + ":" + b.VolName
+		err = cloneIface(b, newIface)
+		if err != nil {
+			glog.Errorf("iscsi: failed to clone iface: %s error: %v", b.Iface, err)
+			return "", err
+		}
+		// update iface name
+		b.Iface = newIface
+	}
+
+	for _, tp := range bkpPortal {
+		// Rescan sessions to discover newly mapped LUNs. Do not specify the interface when rescanning
+		// to avoid establishing additional sessions to the same target.
+		out, err := b.exec.Run("iscsiadm", "-m", "node", "-p", tp, "-T", b.Iqn, "-R")
+		if err != nil {
+			glog.Errorf("iscsi: failed to rescan session with error: %s (%v)", string(out), err)
+		}
+
+		if iscsiTransport == "" {
+			glog.Errorf("iscsi: could not find transport name in iface %s", b.Iface)
+			return "", fmt.Errorf("Could not parse iface file for %s", b.Iface)
+		}
+		if iscsiTransport == "tcp" {
+			devicePath = strings.Join([]string{"/dev/disk/by-path/ip", tp, "iscsi", b.Iqn, "lun", b.Lun}, "-")
+		} else {
+			devicePath = strings.Join([]string{"/dev/disk/by-path/pci", "*", "ip", tp, "iscsi", b.Iqn, "lun", b.Lun}, "-")
+		}
+
+		if exist := waitForPathToExist(&devicePath, 1, iscsiTransport); exist {
+			glog.V(4).Infof("iscsi: devicepath (%s) exists", devicePath)
+			devicePaths = append(devicePaths, devicePath)
+			continue
+		}
+		// build discoverydb and discover iscsi target
+		b.exec.Run("iscsiadm", "-m", "discoverydb", "-t", "sendtargets", "-p", tp, "-I", b.Iface, "-o", "new")
+		// update discoverydb with CHAP secret
+		err = updateISCSIDiscoverydb(b, tp)
+		if err != nil {
+			lastErr = fmt.Errorf("iscsi: failed to update discoverydb to portal %s error: %v", tp, err)
+			continue
+		}
+		out, err = b.exec.Run("iscsiadm", "-m", "discoverydb", "-t", "sendtargets", "-p", tp, "-I", b.Iface, "--discover")
+		if err != nil {
+			// delete discoverydb record
+			b.exec.Run("iscsiadm", "-m", "discoverydb", "-t", "sendtargets", "-p", tp, "-I", b.Iface, "-o", "delete")
+			lastErr = fmt.Errorf("iscsi: failed to sendtargets to portal %s output: %s, err %v", tp, string(out), err)
+			continue
+		}
+		err = updateISCSINode(b, tp)
+		if err != nil {
+			// failure to update node db is rare. But deleting record will likely impact those who already start using it.
+			lastErr = fmt.Errorf("iscsi: failed to update iscsi node to portal %s error: %v", tp, err)
+			continue
+		}
+		// login to iscsi target
+		out, err = b.exec.Run("iscsiadm", "-m", "node", "-p", tp, "-T", b.Iqn, "-I", b.Iface, "--login")
+		if err != nil {
+			// delete the node record from database
+			b.exec.Run("iscsiadm", "-m", "node", "-p", tp, "-I", b.Iface, "-T", b.Iqn, "-o", "delete")
+			lastErr = fmt.Errorf("iscsi: failed to attach disk: Error: %s (%v)", string(out), err)
+			continue
+		}
+		// in case of node failure/restart, explicitly set to manual login so it doesn't hang on boot
+		out, err = b.exec.Run("iscsiadm", "-m", "node", "-p", tp, "-T", b.Iqn, "-o", "update", "node.startup", "-v", "manual")
+		if err != nil {
+			// don't fail if we can't set startup mode, but log warning so there is a clue
+			glog.Warningf("Warning: Failed to set iSCSI login mode to manual. Error: %v", err)
+		}
+		if exist := waitForPathToExist(&devicePath, 10, iscsiTransport); !exist {
+			glog.Errorf("Could not attach disk: Timeout after 10s")
+			// update last error
+			lastErr = fmt.Errorf("Could not attach disk: Timeout after 10s")
+			continue
+		} else {
+			devicePaths = append(devicePaths, devicePath)
+		}
+	}
+
+	if len(devicePaths) == 0 {
+		// delete cloned iface
+		b.exec.Run("iscsiadm", "-m", "iface", "-I", b.Iface, "-o", "delete")
+		glog.Errorf("iscsi: failed to get any path for iscsi disk, last err seen:\n%v", lastErr)
+		return "", fmt.Errorf("failed to get any path for iscsi disk, last err seen:\n%v", lastErr)
+	}
+	if lastErr != nil {
+		glog.Errorf("iscsi: last error occurred during iscsi init:\n%v", lastErr)
+	}
+
+	//Make sure we use a valid devicepath to find mpio device.
+	devicePath = devicePaths[0]
+	for _, path := range devicePaths {
+		// There shouldnt be any empty device paths. However adding this check
+		// for safer side to avoid the possibility of an empty entry.
+		if path == "" {
+			continue
+		}
+		// check if the dev is using mpio and if so mount it via the dm-XX device
+		if mappedDevicePath := b.deviceUtil.FindMultipathDeviceForDevice(path); mappedDevicePath != "" {
+			devicePath = mappedDevicePath
+			break
+		}
+	}
+	glog.V(5).Infof("iscsi: AttachDisk devicePath: %s", devicePath)
+	// run global mount path related operations based on volumeMode
+	return globalPDPathOperation(b)(b, devicePath, util)
+}
+
+// globalPDPathOperation returns global mount path related operations based on volumeMode.
+// If the volumeMode is 'Filesystem' or not defined, plugin needs to create a dir, persist
+// iscsi configurations, and then format/mount the volume.
+// If the volumeMode is 'Block', plugin creates a dir and persists iscsi configurations.
+// Since volume type is block, plugin doesn't need to format/mount the volume.
+func globalPDPathOperation(b iscsiDiskMounter) func(iscsiDiskMounter, string, *ISCSIUtil) (string, error) {
+	// TODO: remove feature gate check after no longer needed
+	if utilfeature.DefaultFeatureGate.Enabled(features.BlockVolume) {
+		glog.V(5).Infof("iscsi: AttachDisk volumeMode: %s", b.volumeMode)
+		if b.volumeMode == v1.PersistentVolumeBlock {
+			// If the volumeMode is 'Block', plugin don't need to format the volume.
+			return func(b iscsiDiskMounter, devicePath string, util *ISCSIUtil) (string, error) {
+				globalPDPath := b.manager.MakeGlobalVDPDName(*b.iscsiDisk)
+				// Create dir like /var/lib/kubelet/plugins/kubernetes.io/iscsi/volumeDevices/{ifaceName}/{portal-some_iqn-lun-lun_id}
+				if err := os.MkdirAll(globalPDPath, 0750); err != nil {
+					glog.Errorf("iscsi: failed to mkdir %s, error", globalPDPath)
+					return "", err
+				}
+				// Persist iscsi disk config to json file for DetachDisk path
+				util.persistISCSI(*(b.iscsiDisk), globalPDPath)
+
+				return devicePath, nil
+			}
+		}
+	}
+	// If the volumeMode is 'Filesystem', plugin needs to format the volume
+	// and mount it to globalPDPath.
+	return func(b iscsiDiskMounter, devicePath string, util *ISCSIUtil) (string, error) {
+		globalPDPath := b.manager.MakeGlobalPDName(*b.iscsiDisk)
+		notMnt, err := b.mounter.IsLikelyNotMountPoint(globalPDPath)
+		if err != nil && !os.IsNotExist(err) {
+			return "", fmt.Errorf("Heuristic determination of mount point failed:%v", err)
+		}
+		// Return confirmed devicePath to caller
+		if !notMnt {
+			glog.Infof("iscsi: %s already mounted", globalPDPath)
+			return devicePath, nil
+		}
+		// Create dir like /var/lib/kubelet/plugins/kubernetes.io/iscsi/{ifaceName}/{portal-some_iqn-lun-lun_id}
+		if err := os.MkdirAll(globalPDPath, 0750); err != nil {
+			glog.Errorf("iscsi: failed to mkdir %s, error", globalPDPath)
+			return "", err
+		}
+		// Persist iscsi disk config to json file for DetachDisk path
+		util.persistISCSI(*(b.iscsiDisk), globalPDPath)
+
+		err = b.mounter.FormatAndMount(devicePath, globalPDPath, b.fsType, nil)
+		if err != nil {
+			glog.Errorf("iscsi: failed to mount iscsi volume %s [%s] to %s, error %v", devicePath, b.fsType, globalPDPath, err)
+		}
+
+		return devicePath, nil
+	}
+}
+
+// DetachDisk unmounts and detaches a volume from node
+func (util *ISCSIUtil) DetachDisk(c iscsiDiskUnmounter, mntPath string) error {
+	if pathExists, pathErr := volumeutil.PathExists(mntPath); 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", mntPath)
+		return nil
+	}
+	if err := c.mounter.Unmount(mntPath); err != nil {
+		glog.Errorf("iscsi detach disk: failed to unmount: %s\nError: %v", mntPath, err)
+		return err
+	}
+	// if device is no longer used, see if need to logout the target
+	device, prefix, err := extractDeviceAndPrefix(mntPath)
+	if err != nil {
+		return err
+	}
+	refCount, err := getDevicePrefixRefCount(c.mounter, prefix)
+	if err != nil || refCount != 0 {
+		return nil
+	}
+
+	var bkpPortal []string
+	var volName, iqn, iface, initiatorName string
+	found := true
+
+	// load iscsi disk config from json file
+	if err := util.loadISCSI(c.iscsiDisk, mntPath); err == nil {
+		bkpPortal, iqn, iface, volName = c.iscsiDisk.Portals, c.iscsiDisk.Iqn, c.iscsiDisk.Iface, c.iscsiDisk.VolName
+		initiatorName = c.iscsiDisk.InitiatorName
+	} else {
+		// If the iscsi disk config is not found, fall back to the original behavior.
+		// This portal/iqn/iface is no longer referenced, log out.
+		// Extract the portal and iqn from device path.
+		bkpPortal = make([]string, 1)
+		bkpPortal[0], iqn, err = extractPortalAndIqn(device)
+		if err != nil {
+			return err
+		}
+		// Extract the iface from the mountPath and use it to log out. If the iface
+		// is not found, maintain the previous behavior to facilitate kubelet upgrade.
+		// Logout may fail as no session may exist for the portal/IQN on the specified interface.
+		iface, found = extractIface(mntPath)
+	}
+	portals := removeDuplicate(bkpPortal)
+	if len(portals) == 0 {
+		return fmt.Errorf("iscsi detach disk: failed to detach iscsi disk. Couldn't get connected portals from configurations")
+	}
+
+	err = util.detachISCSIDisk(c.exec, portals, iqn, iface, volName, initiatorName, found)
+	if err != nil {
+		return fmt.Errorf("failed to finish detachISCSIDisk, err: %v", err)
+	}
+	return nil
+}
+
+// DetachBlockISCSIDisk removes loopback device for a volume and detaches a volume from node
+func (util *ISCSIUtil) DetachBlockISCSIDisk(c iscsiDiskUnmapper, mapPath string) error {
+	if pathExists, pathErr := volumeutil.PathExists(mapPath); pathErr != nil {
+		return fmt.Errorf("Error checking if path exists: %v", pathErr)
+	} else if !pathExists {
+		glog.Warningf("Warning: Unmap skipped because path does not exist: %v", mapPath)
+		return nil
+	}
+	// If we arrive here, device is no longer used, see if need to logout the target
+	// device: 192.168.0.10:3260-iqn.2017-05.com.example:test-lun-0
+	device, _, err := extractDeviceAndPrefix(mapPath)
+	if err != nil {
+		return err
+	}
+	var bkpPortal []string
+	var volName, iqn, lun, iface, initiatorName string
+	found := true
+	// load iscsi disk config from json file
+	if err := util.loadISCSI(c.iscsiDisk, mapPath); err == nil {
+		bkpPortal, iqn, lun, iface, volName = c.iscsiDisk.Portals, c.iscsiDisk.Iqn, c.iscsiDisk.Lun, c.iscsiDisk.Iface, c.iscsiDisk.VolName
+		initiatorName = c.iscsiDisk.InitiatorName
+	} else {
+		// If the iscsi disk config is not found, fall back to the original behavior.
+		// This portal/iqn/iface is no longer referenced, log out.
+		// Extract the portal and iqn from device path.
+		bkpPortal = make([]string, 1)
+		bkpPortal[0], iqn, err = extractPortalAndIqn(device)
+		if err != nil {
+			return err
+		}
+		arr := strings.Split(device, "-lun-")
+		if len(arr) < 2 {
+			return fmt.Errorf("failed to retrieve lun from mapPath: %v", mapPath)
+		}
+		lun = arr[1]
+		// Extract the iface from the mountPath and use it to log out. If the iface
+		// is not found, maintain the previous behavior to facilitate kubelet upgrade.
+		// Logout may fail as no session may exist for the portal/IQN on the specified interface.
+		iface, found = extractIface(mapPath)
+	}
+	portals := removeDuplicate(bkpPortal)
+	if len(portals) == 0 {
+		return fmt.Errorf("iscsi detach disk: failed to detach iscsi disk. Couldn't get connected portals from configurations")
+	}
+
+	devicePath := getDevByPath(portals[0], iqn, lun)
+	glog.V(5).Infof("iscsi: devicePath: %s", devicePath)
+	if _, err = os.Stat(devicePath); err != nil {
+		return fmt.Errorf("failed to validate devicePath: %s", devicePath)
+	}
+	// check if the dev is using mpio and if so mount it via the dm-XX device
+	if mappedDevicePath := c.deviceUtil.FindMultipathDeviceForDevice(devicePath); mappedDevicePath != "" {
+		devicePath = mappedDevicePath
+	}
+	// Get loopback device which takes fd lock for devicePath before detaching a volume from node.
+	// TODO: This is a workaround for issue #54108
+	// Currently local attach plugins such as FC, iSCSI, RBD can't obtain devicePath during
+	// GenerateUnmapDeviceFunc() in operation_generator. As a result, these plugins fail to get
+	// and remove loopback device then it will be remained on kubelet node. To avoid the problem,
+	// local attach plugins needs to remove loopback device during TearDownDevice().
+	blkUtil := volumepathhandler.NewBlockVolumePathHandler()
+	loop, err := volumepathhandler.BlockVolumePathHandler.GetLoopDevice(blkUtil, devicePath)
+	if err != nil {
+		if err.Error() != volumepathhandler.ErrDeviceNotFound {
+			return fmt.Errorf("failed to get loopback for device: %v, err: %v", devicePath, err)
+		}
+		glog.Warning("iscsi: loopback for device: %s not found", device)
+	}
+	// Detach a volume from kubelet node
+	err = util.detachISCSIDisk(c.exec, portals, iqn, iface, volName, initiatorName, found)
+	if err != nil {
+		return fmt.Errorf("failed to finish detachISCSIDisk, err: %v", err)
+	}
+	if len(loop) != 0 {
+		// The volume was successfully detached from node. We can safely remove the loopback.
+		err = volumepathhandler.BlockVolumePathHandler.RemoveLoopDevice(blkUtil, loop)
+		if err != nil {
+			return fmt.Errorf("failed to remove loopback :%v, err: %v", loop, err)
+		}
+	}
+	return nil
+}
+
+func (util *ISCSIUtil) detachISCSIDisk(exec mount.Exec, portals []string, iqn, iface, volName, initiatorName string, found bool) error {
+	for _, portal := range portals {
+		logoutArgs := []string{"-m", "node", "-p", portal, "-T", iqn, "--logout"}
+		deleteArgs := []string{"-m", "node", "-p", portal, "-T", iqn, "-o", "delete"}
+		if found {
+			logoutArgs = append(logoutArgs, []string{"-I", iface}...)
+			deleteArgs = append(deleteArgs, []string{"-I", iface}...)
+		}
+		glog.Infof("iscsi: log out target %s iqn %s iface %s", portal, iqn, iface)
+		out, err := exec.Run("iscsiadm", logoutArgs...)
+		if err != nil {
+			glog.Errorf("iscsi: failed to detach disk Error: %s", string(out))
+		}
+		// Delete the node record
+		glog.Infof("iscsi: delete node record target %s iqn %s", portal, iqn)
+		out, err = exec.Run("iscsiadm", deleteArgs...)
+		if err != nil {
+			glog.Errorf("iscsi: failed to delete node record Error: %s", string(out))
+		}
+	}
+	// Delete the iface after all sessions have logged out
+	// If the iface is not created via iscsi plugin, skip to delete
+	if initiatorName != "" && found && iface == (portals[0]+":"+volName) {
+		deleteArgs := []string{"-m", "iface", "-I", iface, "-o", "delete"}
+		out, err := exec.Run("iscsiadm", deleteArgs...)
+		if err != nil {
+			glog.Errorf("iscsi: failed to delete iface Error: %s", string(out))
+		}
+	}
+
+	return nil
+}
+
+func getDevByPath(portal, iqn, lun string) string {
+	return "/dev/disk/by-path/ip-" + portal + "-iscsi-" + iqn + "-lun-" + lun
+}
+
+func extractTransportname(ifaceOutput string) (iscsiTransport string) {
+	rexOutput := ifaceTransportNameRe.FindStringSubmatch(ifaceOutput)
+	if rexOutput == nil {
+		return ""
+	}
+	iscsiTransport = rexOutput[1]
+
+	// While iface.transport_name is a required parameter, handle it being unspecified anyways
+	if iscsiTransport == "<empty>" {
+		iscsiTransport = "tcp"
+	}
+	return iscsiTransport
+}
+
+func extractDeviceAndPrefix(mntPath string) (string, string, error) {
+	ind := strings.LastIndex(mntPath, "/")
+	if ind < 0 {
+		return "", "", fmt.Errorf("iscsi detach disk: malformatted mnt path: %s", mntPath)
+	}
+	device := mntPath[(ind + 1):]
+	// strip -lun- from mount path
+	ind = strings.LastIndex(mntPath, "-lun-")
+	if ind < 0 {
+		return "", "", fmt.Errorf("iscsi detach disk: malformatted mnt path: %s", mntPath)
+	}
+	prefix := mntPath[:ind]
+	return device, prefix, nil
+}
+
+func extractIface(mntPath string) (string, bool) {
+	reOutput := ifaceRe.FindStringSubmatch(mntPath)
+	if reOutput != nil {
+		return reOutput[1], true
+	}
+
+	return "", false
+}
+
+func extractPortalAndIqn(device string) (string, string, error) {
+	ind1 := strings.Index(device, "-")
+	if ind1 < 0 {
+		return "", "", fmt.Errorf("iscsi detach disk: no portal in %s", device)
+	}
+	portal := device[0:ind1]
+	ind2 := strings.Index(device, "iqn.")
+	if ind2 < 0 {
+		ind2 = strings.Index(device, "eui.")
+	}
+	if ind2 < 0 {
+		return "", "", fmt.Errorf("iscsi detach disk: no iqn in %s", device)
+	}
+	ind := strings.LastIndex(device, "-lun-")
+	iqn := device[ind2:ind]
+	return portal, iqn, nil
+}
+
+// Remove duplicates or string
+func removeDuplicate(s []string) []string {
+	m := map[string]bool{}
+	for _, v := range s {
+		if v != "" && !m[v] {
+			s[len(m)] = v
+			m[v] = true
+		}
+	}
+	s = s[:len(m)]
+	return s
+}
+
+func parseIscsiadmShow(output string) (map[string]string, error) {
+	params := make(map[string]string)
+	slice := strings.Split(output, "\n")
+	for _, line := range slice {
+		if !strings.HasPrefix(line, "iface.") || strings.Contains(line, "<empty>") {
+			continue
+		}
+		iface := strings.Fields(line)
+		if len(iface) != 3 || iface[1] != "=" {
+			return nil, fmt.Errorf("Error: invalid iface setting: %v", iface)
+		}
+		// iscsi_ifacename is immutable once the iface is created
+		if iface[0] == "iface.iscsi_ifacename" {
+			continue
+		}
+		params[iface[0]] = iface[2]
+	}
+	return params, nil
+}
+
+func cloneIface(b iscsiDiskMounter, newIface string) error {
+	var lastErr error
+	// get pre-configured iface records
+	out, err := b.exec.Run("iscsiadm", "-m", "iface", "-I", b.Iface, "-o", "show")
+	if err != nil {
+		lastErr = fmt.Errorf("iscsi: failed to show iface records: %s (%v)", string(out), err)
+		return lastErr
+	}
+	// parse obtained records
+	params, err := parseIscsiadmShow(string(out))
+	if err != nil {
+		lastErr = fmt.Errorf("iscsi: failed to parse iface records: %s (%v)", string(out), err)
+		return lastErr
+	}
+	// update initiatorname
+	params["iface.initiatorname"] = b.InitiatorName
+	// create new iface
+	out, err = b.exec.Run("iscsiadm", "-m", "iface", "-I", newIface, "-o", "new")
+	if err != nil {
+		lastErr = fmt.Errorf("iscsi: failed to create new iface: %s (%v)", string(out), err)
+		return lastErr
+	}
+	// update new iface records
+	for key, val := range params {
+		_, err = b.exec.Run("iscsiadm", "-m", "iface", "-I", newIface, "-o", "update", "-n", key, "-v", val)
+		if err != nil {
+			b.exec.Run("iscsiadm", "-m", "iface", "-I", newIface, "-o", "delete")
+			lastErr = fmt.Errorf("iscsi: failed to update iface records: %s (%v). iface(%s) will be used", string(out), err, b.Iface)
+			break
+		}
+	}
+	return lastErr
+}

vendor/k8s.io/kubernetes/pkg/volume/iscsi/iscsi_util_test.go

@@ -0,0 +1,362 @@
+/*
+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 iscsi
+
+import (
+	"errors"
+	"fmt"
+	"os"
+	"path/filepath"
+	"reflect"
+	"testing"
+
+	"k8s.io/kubernetes/pkg/util/mount"
+	"k8s.io/kubernetes/pkg/volume"
+)
+
+func TestGetDevicePrefixRefCount(t *testing.T) {
+	fm := &mount.FakeMounter{
+		MountPoints: []mount.MountPoint{
+			{Device: "/dev/sdb",
+				Path: "/127.0.0.1:3260-iqn.2014-12.com.example:test.tgt00-lun-0"},
+			{Device: "/dev/sdb",
+				Path: "/127.0.0.1:3260-iqn.2014-12.com.example:test.tgt00-lun-1"},
+			{Device: "/dev/sdb",
+				Path: "/127.0.0.1:3260-iqn.2014-12.com.example:test.tgt00-lun-2"},
+			{Device: "/dev/sdb",
+				Path: "/127.0.0.1:3260-iqn.2014-12.com.example:test.tgt00-lun-3"},
+		},
+	}
+
+	tests := []struct {
+		devicePrefix string
+		expectedRefs int
+	}{
+		{
+			"/127.0.0.1:3260-iqn.2014-12.com.example:test.tgt00",
+			4,
+		},
+	}
+
+	for i, test := range tests {
+		if refs, err := getDevicePrefixRefCount(fm, test.devicePrefix); err != nil || test.expectedRefs != refs {
+			t.Errorf("%d. GetDevicePrefixRefCount(%s) = %d, %v; expected %d, nil", i, test.devicePrefix, refs, err, test.expectedRefs)
+		}
+	}
+}
+
+func TestExtractDeviceAndPrefix(t *testing.T) {
+	devicePath := "127.0.0.1:3260-iqn.2014-12.com.example:test.tgt00"
+	mountPrefix := "/var/lib/kubelet/plugins/kubernetes.io/iscsi/iface-default/" + devicePath
+	lun := "-lun-0"
+	device, prefix, err := extractDeviceAndPrefix(mountPrefix + lun)
+	if err != nil || device != (devicePath+lun) || prefix != mountPrefix {
+		t.Errorf("extractDeviceAndPrefix: expected %s and %s, got %v %s and %s", devicePath+lun, mountPrefix, err, device, prefix)
+	}
+}
+
+func TestExtractIface(t *testing.T) {
+	ifaceName := "default"
+	devicePath := "127.0.0.1:3260-iqn.2014-12.com.example:test.tgt00-lun-0"
+	iface, found := extractIface("/var/lib/kubelet/plugins/kubernetes.io/iscsi/iface-" + ifaceName + "/" + devicePath)
+	if !found || iface != ifaceName {
+		t.Errorf("extractIface: expected %s and %t, got %s and %t", ifaceName, true, iface, found)
+	}
+	iface, found = extractIface("/var/lib/kubelet/plugins/kubernetes.io/iscsi/" + devicePath)
+	if found || iface != "" {
+		t.Errorf("extractIface: expected %s and %t, got %s and %t", "", false, iface, found)
+	}
+}
+
+func TestExtractPortalAndIqn(t *testing.T) {
+	devicePath := "127.0.0.1:3260-iqn.2014-12.com.example:test.tgt00-lun-0"
+	portal, iqn, err := extractPortalAndIqn(devicePath)
+	if err != nil || portal != "127.0.0.1:3260" || iqn != "iqn.2014-12.com.example:test.tgt00" {
+		t.Errorf("extractPortalAndIqn: got %v %s %s", err, portal, iqn)
+	}
+	devicePath = "127.0.0.1:3260-eui.02004567A425678D-lun-0"
+	portal, iqn, err = extractPortalAndIqn(devicePath)
+	if err != nil || portal != "127.0.0.1:3260" || iqn != "eui.02004567A425678D" {
+		t.Errorf("extractPortalAndIqn: got %v %s %s", err, portal, iqn)
+	}
+}
+
+func TestRemoveDuplicate(t *testing.T) {
+	dupPortals := []string{"127.0.0.1:3260", "127.0.0.1:3260", "127.0.0.100:3260"}
+	portals := removeDuplicate(dupPortals)
+	want := []string{"127.0.0.1:3260", "127.0.0.100:3260"}
+	if reflect.DeepEqual(portals, want) == false {
+		t.Errorf("removeDuplicate: want: %s, got: %s", want, portals)
+	}
+}
+
+func fakeOsStat(devicePath string) (fi os.FileInfo, err error) {
+	var cmd os.FileInfo
+	return cmd, nil
+}
+
+func fakeFilepathGlob(devicePath string) (globs []string, err error) {
+	return []string{devicePath}, nil
+}
+
+func fakeFilepathGlob2(devicePath string) (globs []string, err error) {
+	return []string{
+		"/dev/disk/by-path/pci-0000:00:00.0-ip-127.0.0.1:3260-iqn.2014-12.com.example:test.tgt00-lun-0",
+	}, nil
+}
+
+func TestExtractTransportname(t *testing.T) {
+	fakeIscsiadmOutput := []string{
+		"# BEGIN RECORD 2.0-873\n" +
+			"iface.iscsi_ifacename = default\n" +
+			"iface.transport_name = tcp\n" +
+			"iface.initiatorname = <empty>\n" +
+			"# END RECORD",
+		"# BEGIN RECORD 2.0-873\n" +
+			"iface.iscsi_ifacename = default\n" +
+			"iface.transport_name = cxgb4i\n" +
+			"iface.initiatorname = <empty>\n" +
+			"# END RECORD",
+		"# BEGIN RECORD 2.0-873\n" +
+			"iface.iscsi_ifacename = default\n" +
+			"iface.transport_name = <empty>\n" +
+			"iface.initiatorname = <empty>\n" +
+			"# END RECORD",
+		"# BEGIN RECORD 2.0-873\n" +
+			"iface.iscsi_ifacename = default\n" +
+			"iface.initiatorname = <empty>\n" +
+			"# END RECORD"}
+	transportName := extractTransportname(fakeIscsiadmOutput[0])
+	if transportName != "tcp" {
+		t.Errorf("extractTransportname: Could not extract correct iface.transport_name 'tcp', got %s", transportName)
+	}
+	transportName = extractTransportname(fakeIscsiadmOutput[1])
+	if transportName != "cxgb4i" {
+		t.Errorf("extractTransportname: Could not extract correct iface.transport_name 'cxgb4i', got %s", transportName)
+	}
+	transportName = extractTransportname(fakeIscsiadmOutput[2])
+	if transportName != "tcp" {
+		t.Errorf("extractTransportname: Could not extract correct iface.transport_name 'tcp', got %s", transportName)
+	}
+	transportName = extractTransportname(fakeIscsiadmOutput[3])
+	if transportName != "" {
+		t.Errorf("extractTransportname: Could not extract correct iface.transport_name '', got %s", transportName)
+	}
+}
+
+func TestWaitForPathToExist(t *testing.T) {
+	devicePath := []string{"/dev/disk/by-path/ip-127.0.0.1:3260-iqn.2014-12.com.example:test.tgt00-lun-0",
+		"/dev/disk/by-path/pci-*-ip-127.0.0.1:3260-iqn.2014-12.com.example:test.tgt00-lun-0"}
+	fpath := "/dev/disk/by-path/pci-0000:00:00.0-ip-127.0.0.1:3260-iqn.2014-12.com.example:test.tgt00-lun-0"
+
+	exist := waitForPathToExistInternal(&devicePath[0], 1, "tcp", fakeOsStat, filepath.Glob)
+	if exist == false {
+		t.Errorf("waitForPathToExist: could not find path %s", devicePath[0])
+	}
+	exist = waitForPathToExistInternal(&devicePath[0], 1, "fake_iface", fakeOsStat, filepath.Glob)
+	if exist != false {
+		t.Errorf("waitForPathToExist: wrong code path called for %s", devicePath[0])
+	}
+
+	exist = waitForPathToExistInternal(&devicePath[1], 1, "fake_iface", os.Stat, fakeFilepathGlob)
+	if exist == false {
+		t.Errorf("waitForPathToExist: could not find path %s", devicePath[1])
+	}
+	exist = waitForPathToExistInternal(&devicePath[1], 1, "tcp", os.Stat, fakeFilepathGlob)
+	if exist != false {
+		t.Errorf("waitForPathToExist: wrong code path called for %s", devicePath[1])
+	}
+
+	exist = waitForPathToExistInternal(&devicePath[1], 1, "fake_iface", os.Stat, fakeFilepathGlob2)
+	if devicePath[1] != fpath {
+		t.Errorf("waitForPathToExist: wrong code path called for %s", devicePath[1])
+	}
+}
+
+func TestParseIscsiadmShow(t *testing.T) {
+	fakeIscsiadmOutput1 := "# BEGIN RECORD 2.0-873\n" +
+		"iface.iscsi_ifacename = default\n" +
+		"iface.transport_name = tcp\n" +
+		"iface.initiatorname = <empty>\n" +
+		"iface.mtu = 0\n" +
+		"# END RECORD"
+
+	fakeIscsiadmOutput2 := "# BEGIN RECORD 2.0-873\n" +
+		"iface.iscsi_ifacename = default\n" +
+		"iface.transport_name = cxgb4i\n" +
+		"iface.initiatorname = <empty>\n" +
+		"iface.mtu = 0\n" +
+		"# END RECORD"
+
+	fakeIscsiadmOutput3 := "# BEGIN RECORD 2.0-873\n" +
+		"iface.iscsi_ifacename = custom\n" +
+		"iface.transport_name = <empty>\n" +
+		"iface.initiatorname = <empty>\n" +
+		"iface.mtu = 0\n" +
+		"# END RECORD"
+
+	fakeIscsiadmOutput4 := "iface.iscsi_ifacename=error"
+	fakeIscsiadmOutput5 := "iface.iscsi_ifacename + error"
+
+	expectedIscsiadmOutput1 := map[string]string{
+		"iface.transport_name": "tcp",
+		"iface.mtu":            "0"}
+
+	expectedIscsiadmOutput2 := map[string]string{
+		"iface.transport_name": "cxgb4i",
+		"iface.mtu":            "0"}
+
+	expectedIscsiadmOutput3 := map[string]string{
+		"iface.mtu": "0"}
+
+	params, _ := parseIscsiadmShow(fakeIscsiadmOutput1)
+	if !reflect.DeepEqual(params, expectedIscsiadmOutput1) {
+		t.Errorf("parseIscsiadmShow: Fail to parse iface record: %s", params)
+	}
+	params, _ = parseIscsiadmShow(fakeIscsiadmOutput2)
+	if !reflect.DeepEqual(params, expectedIscsiadmOutput2) {
+		t.Errorf("parseIscsiadmShow: Fail to parse iface record: %s", params)
+	}
+	params, _ = parseIscsiadmShow(fakeIscsiadmOutput3)
+	if !reflect.DeepEqual(params, expectedIscsiadmOutput3) {
+		t.Errorf("parseIscsiadmShow: Fail to parse iface record: %s", params)
+	}
+	_, err := parseIscsiadmShow(fakeIscsiadmOutput4)
+	if err == nil {
+		t.Errorf("parseIscsiadmShow: Fail to handle invalid record: iface %s", fakeIscsiadmOutput4)
+	}
+	_, err = parseIscsiadmShow(fakeIscsiadmOutput5)
+	if err == nil {
+		t.Errorf("parseIscsiadmShow: Fail to handle invalid record: iface %s", fakeIscsiadmOutput5)
+	}
+}
+
+func TestClonedIface(t *testing.T) {
+	cmdCount := 0
+	fakeExec := mount.NewFakeExec(func(cmd string, args ...string) ([]byte, error) {
+		cmdCount++
+		if cmd != "iscsiadm" {
+			t.Errorf("iscsiadm command expected, got %q", cmd)
+		}
+		switch cmdCount {
+		case 1:
+			// iscsiadm -m iface -I <iface> -o show
+			return []byte("iface.ipaddress = <empty>\niface.transport_name = tcp\niface.initiatorname = <empty>\n"), nil
+
+		case 2:
+			// iscsiadm -m iface -I <newIface> -o new
+			return []byte("New interface 192.168.1.10:pv0001 added"), nil
+		case 3:
+			// iscsiadm -m iface -I <newIface> -o update -n <key> -v <val>
+			return []byte(""), nil
+		case 4:
+			return []byte(""), nil
+		}
+		return nil, fmt.Errorf("Unexpected exec call nr %d: %s", cmdCount, cmd)
+	})
+	plugins := []volume.VolumePlugin{
+		&iscsiPlugin{
+			host: nil,
+		},
+	}
+	plugin := plugins[0]
+	fakeMounter := iscsiDiskMounter{
+		iscsiDisk: &iscsiDisk{
+			plugin: plugin.(*iscsiPlugin)},
+		exec: fakeExec,
+	}
+	newIface := "192.168.1.10:pv0001"
+	cloneIface(fakeMounter, newIface)
+	if cmdCount != 4 {
+		t.Errorf("expected 4 CombinedOutput() calls, got %d", cmdCount)
+	}
+
+}
+
+func TestClonedIfaceShowError(t *testing.T) {
+	cmdCount := 0
+	fakeExec := mount.NewFakeExec(func(cmd string, args ...string) ([]byte, error) {
+		cmdCount++
+		if cmd != "iscsiadm" {
+			t.Errorf("iscsiadm command expected, got %q", cmd)
+		}
+		// iscsiadm -m iface -I <iface> -o show, return test error
+		return []byte(""), errors.New("test error")
+	})
+	plugins := []volume.VolumePlugin{
+		&iscsiPlugin{
+			host: nil,
+		},
+	}
+	plugin := plugins[0]
+	fakeMounter := iscsiDiskMounter{
+		iscsiDisk: &iscsiDisk{
+			plugin: plugin.(*iscsiPlugin)},
+		exec: fakeExec,
+	}
+	newIface := "192.168.1.10:pv0001"
+	cloneIface(fakeMounter, newIface)
+	if cmdCount != 1 {
+		t.Errorf("expected 1 CombinedOutput() calls, got %d", cmdCount)
+	}
+
+}
+
+func TestClonedIfaceUpdateError(t *testing.T) {
+	cmdCount := 0
+	fakeExec := mount.NewFakeExec(func(cmd string, args ...string) ([]byte, error) {
+		cmdCount++
+		if cmd != "iscsiadm" {
+			t.Errorf("iscsiadm command expected, got %q", cmd)
+		}
+		switch cmdCount {
+		case 1:
+			// iscsiadm -m iface -I <iface> -o show
+			return []byte("iface.ipaddress = <empty>\niface.transport_name = tcp\niface.initiatorname = <empty>\n"), nil
+
+		case 2:
+			// iscsiadm -m iface -I <newIface> -o new
+			return []byte("New interface 192.168.1.10:pv0001 added"), nil
+		case 3:
+			// iscsiadm -m iface -I <newIface> -o update -n <key> -v <val>
+			return []byte(""), nil
+		case 4:
+			return []byte(""), errors.New("test error")
+		case 5:
+			// iscsiadm -m iface -I <newIface> -o delete
+			return []byte(""), nil
+		}
+		return nil, fmt.Errorf("Unexpected exec call nr %d: %s", cmdCount, cmd)
+	})
+	plugins := []volume.VolumePlugin{
+		&iscsiPlugin{
+			host: nil,
+		},
+	}
+	plugin := plugins[0]
+	fakeMounter := iscsiDiskMounter{
+		iscsiDisk: &iscsiDisk{
+			plugin: plugin.(*iscsiPlugin)},
+		exec: fakeExec,
+	}
+	newIface := "192.168.1.10:pv0001"
+	cloneIface(fakeMounter, newIface)
+	if cmdCount != 5 {
+		t.Errorf("expected 5 CombinedOutput() calls, got %d", cmdCount)
+	}
+
+}