implement proposal 34058: hostPath volume type

pkg/volume/host_path/host_path_unix.go

@@ -0,0 +1,40 @@
+// +build linux darwin
+
+/*
+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 host_path
+
+import (
+	"fmt"
+	"os"
+	"syscall"
+
+	"k8s.io/api/core/v1"
+)
+
+func (dftc *defaultFileTypeChecker) getFileType(info os.FileInfo) (v1.HostPathType, error) {
+	mode := info.Sys().(*syscall.Stat_t).Mode
+	switch mode & syscall.S_IFMT {
+	case syscall.S_IFSOCK:
+		return v1.HostPathSocket, nil
+	case syscall.S_IFBLK:
+		return v1.HostPathBlockDev, nil
+	case syscall.S_IFCHR:
+		return v1.HostPathCharDev, nil
+	}
+	return "", fmt.Errorf("only recognise socket, block device and character device")
+}