vendor update for E2E framework

Signed-off-by: Madhu Rajanna <madhupr007@gmail.com>

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

@@ -0,0 +1,93 @@
+// +build linux
+
+/*
+Copyright 2016 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 volume
+
+import (
+	"path/filepath"
+	"syscall"
+
+	"os"
+
+	"k8s.io/klog"
+)
+
+const (
+	rwMask   = os.FileMode(0660)
+	roMask   = os.FileMode(0440)
+	execMask = os.FileMode(0110)
+)
+
+// SetVolumeOwnership modifies the given volume to be owned by
+// fsGroup, and sets SetGid so that newly created files are owned by
+// fsGroup. If fsGroup is nil nothing is done.
+func SetVolumeOwnership(mounter Mounter, fsGroup *int64) error {
+
+	if fsGroup == nil {
+		return nil
+	}
+
+	return filepath.Walk(mounter.GetPath(), func(path string, info os.FileInfo, err error) error {
+		if err != nil {
+			return err
+		}
+
+		// chown and chmod pass through to the underlying file for symlinks.
+		// Symlinks have a mode of 777 but this really doesn't mean anything.
+		// The permissions of the underlying file are what matter.
+		// However, if one reads the mode of a symlink then chmods the symlink
+		// with that mode, it changes the mode of the underlying file, overridden
+		// the defaultMode and permissions initialized by the volume plugin, which
+		// is not what we want; thus, we skip chown/chmod for symlinks.
+		if info.Mode()&os.ModeSymlink != 0 {
+			return nil
+		}
+
+		stat, ok := info.Sys().(*syscall.Stat_t)
+		if !ok {
+			return nil
+		}
+
+		if stat == nil {
+			klog.Errorf("Got nil stat_t for path %v while setting ownership of volume", path)
+			return nil
+		}
+
+		err = os.Chown(path, int(stat.Uid), int(*fsGroup))
+		if err != nil {
+			klog.Errorf("Chown failed on %v: %v", path, err)
+		}
+
+		mask := rwMask
+		if mounter.GetAttributes().ReadOnly {
+			mask = roMask
+		}
+
+		if info.IsDir() {
+			mask |= os.ModeSetgid
+			mask |= execMask
+		}
+
+		err = os.Chmod(path, info.Mode()|mask)
+		if err != nil {
+			klog.Errorf("Chmod failed on %v: %v", path, err)
+		}
+
+		return nil
+	})
+}