Add generated file

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

vendor/k8s.io/kubernetes/pkg/util/oom/oom_linux.go

@@ -0,0 +1,130 @@
+// +build linux
+
+/*
+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 oom
+
+import (
+	"fmt"
+	"io/ioutil"
+	"os"
+	"path"
+	"path/filepath"
+	"strconv"
+	"time"
+
+	cmutil "k8s.io/kubernetes/pkg/kubelet/cm/util"
+
+	"github.com/golang/glog"
+)
+
+func NewOOMAdjuster() *OOMAdjuster {
+	oomAdjuster := &OOMAdjuster{
+		pidLister:        getPids,
+		ApplyOOMScoreAdj: applyOOMScoreAdj,
+	}
+	oomAdjuster.ApplyOOMScoreAdjContainer = oomAdjuster.applyOOMScoreAdjContainer
+	return oomAdjuster
+}
+
+func getPids(cgroupName string) ([]int, error) {
+	return cmutil.GetPids(filepath.Join("/", cgroupName))
+}
+
+// Writes 'value' to /proc/<pid>/oom_score_adj. PID = 0 means self
+// Returns os.ErrNotExist if the `pid` does not exist.
+func applyOOMScoreAdj(pid int, oomScoreAdj int) error {
+	if pid < 0 {
+		return fmt.Errorf("invalid PID %d specified for oom_score_adj", pid)
+	}
+
+	var pidStr string
+	if pid == 0 {
+		pidStr = "self"
+	} else {
+		pidStr = strconv.Itoa(pid)
+	}
+
+	maxTries := 2
+	oomScoreAdjPath := path.Join("/proc", pidStr, "oom_score_adj")
+	value := strconv.Itoa(oomScoreAdj)
+	glog.V(4).Infof("attempting to set %q to %q", oomScoreAdjPath, value)
+	var err error
+	for i := 0; i < maxTries; i++ {
+		err = ioutil.WriteFile(oomScoreAdjPath, []byte(value), 0700)
+		if err != nil {
+			if os.IsNotExist(err) {
+				glog.V(2).Infof("%q does not exist", oomScoreAdjPath)
+				return os.ErrNotExist
+			}
+
+			glog.V(3).Info(err)
+			time.Sleep(100 * time.Millisecond)
+			continue
+		}
+		return nil
+	}
+	if err != nil {
+		glog.V(2).Infof("failed to set %q to %q: %v", oomScoreAdjPath, value, err)
+	}
+	return err
+}
+
+// Writes 'value' to /proc/<pid>/oom_score_adj for all processes in cgroup cgroupName.
+// Keeps trying to write until the process list of the cgroup stabilizes, or until maxTries tries.
+func (oomAdjuster *OOMAdjuster) applyOOMScoreAdjContainer(cgroupName string, oomScoreAdj, maxTries int) error {
+	adjustedProcessSet := make(map[int]bool)
+	for i := 0; i < maxTries; i++ {
+		continueAdjusting := false
+		pidList, err := oomAdjuster.pidLister(cgroupName)
+		if err != nil {
+			if os.IsNotExist(err) {
+				// Nothing to do since the container doesn't exist anymore.
+				return os.ErrNotExist
+			}
+			continueAdjusting = true
+			glog.V(10).Infof("Error getting process list for cgroup %s: %+v", cgroupName, err)
+		} else if len(pidList) == 0 {
+			glog.V(10).Infof("Pid list is empty")
+			continueAdjusting = true
+		} else {
+			for _, pid := range pidList {
+				if !adjustedProcessSet[pid] {
+					glog.V(10).Infof("pid %d needs to be set", pid)
+					if err = oomAdjuster.ApplyOOMScoreAdj(pid, oomScoreAdj); err == nil {
+						adjustedProcessSet[pid] = true
+					} else if err == os.ErrNotExist {
+						continue
+					} else {
+						glog.V(10).Infof("cannot adjust oom score for pid %d - %v", pid, err)
+						continueAdjusting = true
+					}
+					// Processes can come and go while we try to apply oom score adjust value. So ignore errors here.
+				}
+			}
+		}
+		if !continueAdjusting {
+			return nil
+		}
+		// There's a slight race. A process might have forked just before we write its OOM score adjust.
+		// The fork might copy the parent process's old OOM score, then this function might execute and
+		// update the parent's OOM score, but the forked process id might not be reflected in cgroup.procs
+		// for a short amount of time. So this function might return without changing the forked process's
+		// OOM score. Very unlikely race, so ignoring this for now.
+	}
+	return fmt.Errorf("exceeded maxTries, some processes might not have desired OOM score")
+}