Add generated file

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

vendor/k8s.io/kubernetes/pkg/util/iptables/iptables_linux.go

@@ -0,0 +1,100 @@
+// +build linux
+
+/*
+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 iptables
+
+import (
+	"fmt"
+	"net"
+	"os"
+	"time"
+
+	"golang.org/x/sys/unix"
+	utilerrors "k8s.io/apimachinery/pkg/util/errors"
+	"k8s.io/apimachinery/pkg/util/wait"
+)
+
+type locker struct {
+	lock16 *os.File
+	lock14 *net.UnixListener
+}
+
+func (l *locker) Close() error {
+	errList := []error{}
+	if l.lock16 != nil {
+		if err := l.lock16.Close(); err != nil {
+			errList = append(errList, err)
+		}
+	}
+	if l.lock14 != nil {
+		if err := l.lock14.Close(); err != nil {
+			errList = append(errList, err)
+		}
+	}
+	return utilerrors.NewAggregate(errList)
+}
+
+func grabIptablesLocks(lockfilePath string) (iptablesLocker, error) {
+	var err error
+	var success bool
+
+	l := &locker{}
+	defer func(l *locker) {
+		// Clean up immediately on failure
+		if !success {
+			l.Close()
+		}
+	}(l)
+
+	// Grab both 1.6.x and 1.4.x-style locks; we don't know what the
+	// iptables-restore version is if it doesn't support --wait, so we
+	// can't assume which lock method it'll use.
+
+	// Roughly duplicate iptables 1.6.x xtables_lock() function.
+	l.lock16, err = os.OpenFile(lockfilePath, os.O_CREATE, 0600)
+	if err != nil {
+		return nil, fmt.Errorf("failed to open iptables lock %s: %v", lockfilePath, err)
+	}
+
+	if err := wait.PollImmediate(200*time.Millisecond, 2*time.Second, func() (bool, error) {
+		if err := grabIptablesFileLock(l.lock16); err != nil {
+			return false, nil
+		}
+		return true, nil
+	}); err != nil {
+		return nil, fmt.Errorf("failed to acquire new iptables lock: %v", err)
+	}
+
+	// Roughly duplicate iptables 1.4.x xtables_lock() function.
+	if err := wait.PollImmediate(200*time.Millisecond, 2*time.Second, func() (bool, error) {
+		l.lock14, err = net.ListenUnix("unix", &net.UnixAddr{Name: "@xtables", Net: "unix"})
+		if err != nil {
+			return false, nil
+		}
+		return true, nil
+	}); err != nil {
+		return nil, fmt.Errorf("failed to acquire old iptables lock: %v", err)
+	}
+
+	success = true
+	return l, nil
+}
+
+func grabIptablesFileLock(f *os.File) error {
+	return unix.Flock(int(f.Fd()), unix.LOCK_EX|unix.LOCK_NB)
+}