From a0165a64b9efc3201bda69e4271ecf0f149bc59c Mon Sep 17 00:00:00 2001 From: "dependabot[bot]" <49699333+dependabot[bot]@users.noreply.github.com> Date: Wed, 19 Jan 2022 12:09:54 +0000 Subject: Bump github.com/opencontainers/runc from 1.0.3 to 1.1.0 Bumps [github.com/opencontainers/runc](https://github.com/opencontainers/runc) from 1.0.3 to 1.1.0. - [Release notes](https://github.com/opencontainers/runc/releases) - [Changelog](https://github.com/opencontainers/runc/blob/master/CHANGELOG.md) - [Commits](https://github.com/opencontainers/runc/compare/v1.0.3...v1.1.0) --- updated-dependencies: - dependency-name: github.com/opencontainers/runc dependency-type: direct:production update-type: version-update:semver-minor ... Signed-off-by: dependabot[bot] --- .../runc/libcontainer/cgroups/utils.go | 115 ++++++++++++--------- 1 file changed, 66 insertions(+), 49 deletions(-) (limited to 'vendor/github.com/opencontainers/runc/libcontainer/cgroups/utils.go') diff --git a/vendor/github.com/opencontainers/runc/libcontainer/cgroups/utils.go b/vendor/github.com/opencontainers/runc/libcontainer/cgroups/utils.go index 92606525b..13ebf52ab 100644 --- a/vendor/github.com/opencontainers/runc/libcontainer/cgroups/utils.go +++ b/vendor/github.com/opencontainers/runc/libcontainer/cgroups/utils.go @@ -1,5 +1,3 @@ -// +build linux - package cgroups import ( @@ -7,7 +5,6 @@ import ( "errors" "fmt" "io" - "io/ioutil" "os" "path/filepath" "strconv" @@ -23,11 +20,14 @@ 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. @@ -49,6 +49,24 @@ 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 @@ -118,8 +136,8 @@ func GetAllSubsystems() ([]string, error) { return subsystems, nil } -func readProcsFile(file string) ([]int, error) { - f, err := os.Open(file) +func readProcsFile(dir string) ([]int, error) { + f, err := OpenFile(dir, CgroupProcesses, os.O_RDONLY) if err != nil { return nil, err } @@ -210,7 +228,7 @@ func EnterPid(cgroupPaths map[string]string, pid int) error { func rmdir(path string) error { err := unix.Rmdir(path) - if err == nil || err == unix.ENOENT { + if err == nil || err == unix.ENOENT { //nolint:errorlint // unix errors are bare return nil } return &os.PathError{Op: "rmdir", Path: path, Err: err} @@ -224,7 +242,7 @@ func RemovePath(path string) error { return nil } - infos, err := ioutil.ReadDir(path) + infos, err := os.ReadDir(path) if err != nil { if os.IsNotExist(err) { err = nil @@ -284,40 +302,61 @@ func RemovePaths(paths map[string]string) (err error) { return fmt.Errorf("Failed to remove paths: %v", paths) } -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 - } +var ( + hugePageSizes []string + initHPSOnce sync.Once +) - return getHugePageSizeFromFilenames(files) +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 } 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 + // Unexpected file name: no prefix found, ignore it. continue } - // The suffix is always "kB" (as of Linux 5.9) + // The suffix is always "kB" (as of Linux 5.13). If we find + // something else, produce an error but keep going. eLen := len(val) - 2 val = strings.TrimSuffix(val, "kB") if len(val) != eLen { - logrus.Warnf("GetHugePageSize: %s: invalid filename suffix (expected \"kB\")", file) + // Highly unlikely. + if warn == nil { + warn = errors.New(file + `: invalid suffix (expected "kB")`) + } continue } size, err := strconv.Atoi(val) if err != nil { - return nil, err + // Highly unlikely. + if warn == nil { + warn = fmt.Errorf("%s: %w", file, err) + } + continue } // 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. @@ -331,34 +370,12 @@ func getHugePageSizeFromFilenames(fileNames []string) ([]string, error) { pageSizes = append(pageSizes, val) } - return pageSizes, nil + return pageSizes, warn } // GetPids returns all pids, that were added to cgroup at path. func GetPids(dir string) ([]int, error) { - 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 + return readProcsFile(dir) } // WriteCgroupProc writes the specified pid into the cgroup's cgroup.procs file @@ -376,7 +393,7 @@ 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 to %v: %v", pid, CgroupProcesses, err) + return fmt.Errorf("failed to write %v: %w", pid, err) } defer file.Close() @@ -393,7 +410,7 @@ func WriteCgroupProc(dir string, pid int) error { continue } - return fmt.Errorf("failed to write %v to %v: %v", pid, CgroupProcesses, err) + return fmt.Errorf("failed to write %v: %w", pid, err) } return err } @@ -446,5 +463,5 @@ func ConvertBlkIOToIOWeightValue(blkIoWeight uint16) uint64 { if blkIoWeight == 0 { return 0 } - return uint64(1 + (uint64(blkIoWeight)-10)*9999/990) + return 1 + (uint64(blkIoWeight)-10)*9999/990 } -- cgit v1.2.3-54-g00ecf