Add generated file

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

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

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