upgrade all dependencies

The dependabot does not update dependencies when they do not use a tag.
This patch upgrades all untagged depenencies if possible.

You can upgrade all dependencies with `go get -u ./... && make vendor`
in theory however this failed since the k8s changes do not compile on
go v1.16 so I only updated the other dependencies.

Signed-off-by: Paul Holzinger <pholzing@redhat.com>

vendor/github.com/opencontainers/runc/libcontainer/cgroups/utils.go

@@ -1,3 +1,5 @@
+// +build linux
+
 package cgroups
 
 import (
@@ -5,6 +7,7 @@ import (
 	"errors"
 	"fmt"
 	"io"
+	"io/ioutil"
 	"os"
 	"path/filepath"
 	"strconv"
@@ -20,14 +23,11 @@ import (
 const (
 	CgroupProcesses   = "cgroup.procs"
 	unifiedMountpoint = "/sys/fs/cgroup"
-	hybridMountpoint  = "/sys/fs/cgroup/unified"
 )
 
 var (
 	isUnifiedOnce sync.Once
 	isUnified     bool
-	isHybridOnce  sync.Once
-	isHybrid      bool
 )
 
 // IsCgroup2UnifiedMode returns whether we are running in cgroup v2 unified mode.
@@ -49,24 +49,6 @@ func IsCgroup2UnifiedMode() bool {
 	return isUnified
 }
 
-// IsCgroup2HybridMode returns whether we are running in cgroup v2 hybrid mode.
-func IsCgroup2HybridMode() bool {
-	isHybridOnce.Do(func() {
-		var st unix.Statfs_t
-		err := unix.Statfs(hybridMountpoint, &st)
-		if err != nil {
-			if os.IsNotExist(err) {
-				// ignore the "not found" error
-				isHybrid = false
-				return
-			}
-			panic(fmt.Sprintf("cannot statfs cgroup root: %s", err))
-		}
-		isHybrid = st.Type == unix.CGROUP2_SUPER_MAGIC
-	})
-	return isHybrid
-}
-
 type Mount struct {
 	Mountpoint string
 	Root       string
@@ -136,8 +118,8 @@ func GetAllSubsystems() ([]string, error) {
 	return subsystems, nil
 }
 
-func readProcsFile(dir string) ([]int, error) {
-	f, err := OpenFile(dir, CgroupProcesses, os.O_RDONLY)
+func readProcsFile(file string) ([]int, error) {
+	f, err := os.Open(file)
 	if err != nil {
 		return nil, err
 	}
@@ -228,7 +210,7 @@ func EnterPid(cgroupPaths map[string]string, pid int) error {
 
 func rmdir(path string) error {
 	err := unix.Rmdir(path)
-	if err == nil || err == unix.ENOENT { //nolint:errorlint // unix errors are bare
+	if err == nil || err == unix.ENOENT {
 		return nil
 	}
 	return &os.PathError{Op: "rmdir", Path: path, Err: err}
@@ -242,7 +224,7 @@ func RemovePath(path string) error {
 		return nil
 	}
 
-	infos, err := os.ReadDir(path)
+	infos, err := ioutil.ReadDir(path)
 	if err != nil {
 		if os.IsNotExist(err) {
 			err = nil
@@ -302,61 +284,40 @@ func RemovePaths(paths map[string]string) (err error) {
 	return fmt.Errorf("Failed to remove paths: %v", paths)
 }
 
-var (
-	hugePageSizes []string
-	initHPSOnce   sync.Once
-)
+func GetHugePageSize() ([]string, error) {
+	dir, err := os.OpenFile("/sys/kernel/mm/hugepages", unix.O_DIRECTORY|unix.O_RDONLY, 0)
+	if err != nil {
+		return nil, err
+	}
+	files, err := dir.Readdirnames(0)
+	dir.Close()
+	if err != nil {
+		return nil, err
+	}
 
-func HugePageSizes() []string {
-	initHPSOnce.Do(func() {
-		dir, err := os.OpenFile("/sys/kernel/mm/hugepages", unix.O_DIRECTORY|unix.O_RDONLY, 0)
-		if err != nil {
-			return
-		}
-		files, err := dir.Readdirnames(0)
-		dir.Close()
-		if err != nil {
-			return
-		}
-
-		hugePageSizes, err = getHugePageSizeFromFilenames(files)
-		if err != nil {
-			logrus.Warn("HugePageSizes: ", err)
-		}
-	})
-
-	return hugePageSizes
+	return getHugePageSizeFromFilenames(files)
 }
 
 func getHugePageSizeFromFilenames(fileNames []string) ([]string, error) {
 	pageSizes := make([]string, 0, len(fileNames))
-	var warn error
 
 	for _, file := range fileNames {
 		// example: hugepages-1048576kB
 		val := strings.TrimPrefix(file, "hugepages-")
 		if len(val) == len(file) {
-			// Unexpected file name: no prefix found, ignore it.
+			// unexpected file name: no prefix found
 			continue
 		}
-		// The suffix is always "kB" (as of Linux 5.13). If we find
-		// something else, produce an error but keep going.
+		// The suffix is always "kB" (as of Linux 5.9)
 		eLen := len(val) - 2
 		val = strings.TrimSuffix(val, "kB")
 		if len(val) != eLen {
-			// Highly unlikely.
-			if warn == nil {
-				warn = errors.New(file + `: invalid suffix (expected "kB")`)
-			}
+			logrus.Warnf("GetHugePageSize: %s: invalid filename suffix (expected \"kB\")", file)
 			continue
 		}
 		size, err := strconv.Atoi(val)
 		if err != nil {
-			// Highly unlikely.
-			if warn == nil {
-				warn = fmt.Errorf("%s: %w", file, err)
-			}
-			continue
+			return nil, err
 		}
 		// Model after https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/mm/hugetlb_cgroup.c?id=eff48ddeab782e35e58ccc8853f7386bbae9dec4#n574
 		// but in our case the size is in KB already.
@@ -370,12 +331,34 @@ func getHugePageSizeFromFilenames(fileNames []string) ([]string, error) {
 		pageSizes = append(pageSizes, val)
 	}
 
-	return pageSizes, warn
+	return pageSizes, nil
 }
 
 // GetPids returns all pids, that were added to cgroup at path.
 func GetPids(dir string) ([]int, error) {
-	return readProcsFile(dir)
+	return readProcsFile(filepath.Join(dir, CgroupProcesses))
+}
+
+// GetAllPids returns all pids, that were added to cgroup at path and to all its
+// subcgroups.
+func GetAllPids(path string) ([]int, error) {
+	var pids []int
+	// collect pids from all sub-cgroups
+	err := filepath.Walk(path, func(p string, info os.FileInfo, iErr error) error {
+		if iErr != nil {
+			return iErr
+		}
+		if info.IsDir() || info.Name() != CgroupProcesses {
+			return nil
+		}
+		cPids, err := readProcsFile(p)
+		if err != nil {
+			return err
+		}
+		pids = append(pids, cPids...)
+		return nil
+	})
+	return pids, err
 }
 
 // WriteCgroupProc writes the specified pid into the cgroup's cgroup.procs file
@@ -393,7 +376,7 @@ func WriteCgroupProc(dir string, pid int) error {
 
 	file, err := OpenFile(dir, CgroupProcesses, os.O_WRONLY)
 	if err != nil {
-		return fmt.Errorf("failed to write %v: %w", pid, err)
+		return fmt.Errorf("failed to write %v to %v: %v", pid, CgroupProcesses, err)
 	}
 	defer file.Close()
 
@@ -410,7 +393,7 @@ func WriteCgroupProc(dir string, pid int) error {
 			continue
 		}
 
-		return fmt.Errorf("failed to write %v: %w", pid, err)
+		return fmt.Errorf("failed to write %v to %v: %v", pid, CgroupProcesses, err)
 	}
 	return err
 }
@@ -463,5 +446,5 @@ func ConvertBlkIOToIOWeightValue(blkIoWeight uint16) uint64 {
 	if blkIoWeight == 0 {
 		return 0
 	}
-	return 1 + (uint64(blkIoWeight)-10)*9999/990
+	return uint64(1 + (uint64(blkIoWeight)-10)*9999/990)
 }