rebase: update replaced k8s.io modules to v0.33.0

Signed-off-by: Niels de Vos <ndevos@ibm.com>

e2e/vendor/github.com/opencontainers/cgroups/fs2/cpu.go

@@ -0,0 +1,117 @@
+package fs2
+
+import (
+	"bufio"
+	"errors"
+	"os"
+	"strconv"
+
+	"golang.org/x/sys/unix"
+
+	"github.com/opencontainers/cgroups"
+	"github.com/opencontainers/cgroups/fscommon"
+)
+
+func isCPUSet(r *cgroups.Resources) bool {
+	return r.CpuWeight != 0 || r.CpuQuota != 0 || r.CpuPeriod != 0 || r.CPUIdle != nil || r.CpuBurst != nil
+}
+
+func setCPU(dirPath string, r *cgroups.Resources) error {
+	if !isCPUSet(r) {
+		return nil
+	}
+
+	if r.CPUIdle != nil {
+		if err := cgroups.WriteFile(dirPath, "cpu.idle", strconv.FormatInt(*r.CPUIdle, 10)); err != nil {
+			return err
+		}
+	}
+
+	// NOTE: .CpuShares is not used here. Conversion is the caller's responsibility.
+	if r.CpuWeight != 0 {
+		if err := cgroups.WriteFile(dirPath, "cpu.weight", strconv.FormatUint(r.CpuWeight, 10)); err != nil {
+			return err
+		}
+	}
+
+	var burst string
+	if r.CpuBurst != nil {
+		burst = strconv.FormatUint(*r.CpuBurst, 10)
+		if err := cgroups.WriteFile(dirPath, "cpu.max.burst", burst); err != nil {
+			// Sometimes when the burst to be set is larger
+			// than the current one, it is rejected by the kernel
+			// (EINVAL) as old_quota/new_burst exceeds the parent
+			// cgroup quota limit. If this happens and the quota is
+			// going to be set, ignore the error for now and retry
+			// after setting the quota.
+			if !errors.Is(err, unix.EINVAL) || r.CpuQuota == 0 {
+				return err
+			}
+		} else {
+			burst = ""
+		}
+	}
+	if r.CpuQuota != 0 || r.CpuPeriod != 0 {
+		str := "max"
+		if r.CpuQuota > 0 {
+			str = strconv.FormatInt(r.CpuQuota, 10)
+		}
+		period := r.CpuPeriod
+		if period == 0 {
+			// This default value is documented in
+			// https://www.kernel.org/doc/html/latest/admin-guide/cgroup-v2.html
+			period = 100000
+		}
+		str += " " + strconv.FormatUint(period, 10)
+		if err := cgroups.WriteFile(dirPath, "cpu.max", str); err != nil {
+			return err
+		}
+		if burst != "" {
+			if err := cgroups.WriteFile(dirPath, "cpu.max.burst", burst); err != nil {
+				return err
+			}
+		}
+	}
+
+	return nil
+}
+
+func statCpu(dirPath string, stats *cgroups.Stats) error {
+	const file = "cpu.stat"
+	f, err := cgroups.OpenFile(dirPath, file, os.O_RDONLY)
+	if err != nil {
+		return err
+	}
+	defer f.Close()
+
+	sc := bufio.NewScanner(f)
+	for sc.Scan() {
+		t, v, err := fscommon.ParseKeyValue(sc.Text())
+		if err != nil {
+			return &parseError{Path: dirPath, File: file, Err: err}
+		}
+		switch t {
+		case "usage_usec":
+			stats.CpuStats.CpuUsage.TotalUsage = v * 1000
+
+		case "user_usec":
+			stats.CpuStats.CpuUsage.UsageInUsermode = v * 1000
+
+		case "system_usec":
+			stats.CpuStats.CpuUsage.UsageInKernelmode = v * 1000
+
+		case "nr_periods":
+			stats.CpuStats.ThrottlingData.Periods = v
+
+		case "nr_throttled":
+			stats.CpuStats.ThrottlingData.ThrottledPeriods = v
+
+		case "throttled_usec":
+			stats.CpuStats.ThrottlingData.ThrottledTime = v * 1000
+		}
+	}
+	if err := sc.Err(); err != nil {
+		return &parseError{Path: dirPath, File: file, Err: err}
+	}
+	return nil
+}