diff options
Diffstat (limited to 'pkg/cgroups/cgroups.go')
| -rw-r--r-- | pkg/cgroups/cgroups.go | 25 |
1 files changed, 9 insertions, 16 deletions
diff --git a/pkg/cgroups/cgroups.go b/pkg/cgroups/cgroups.go index 3cf736bdc..0d7ed05b2 100644 --- a/pkg/cgroups/cgroups.go +++ b/pkg/cgroups/cgroups.go @@ -2,6 +2,7 @@ package cgroups import ( "bufio" + "bytes" "fmt" "io/ioutil" "math" @@ -155,23 +156,15 @@ func (c *CgroupControl) getCgroupv1Path(name string) string { // createCgroupv2Path creates the cgroupv2 path and enables all the available controllers func createCgroupv2Path(path string) (deferredError error) { - content, err := ioutil.ReadFile("/sys/fs/cgroup/cgroup.controllers") - if err != nil { - return err - } - if !strings.HasPrefix(path, "/sys/fs/cgroup/") { + if !strings.HasPrefix(path, cgroupRoot+"/") { return fmt.Errorf("invalid cgroup path %s", path) } - - res := "" - for i, c := range strings.Split(strings.TrimSpace(string(content)), " ") { - if i == 0 { - res = fmt.Sprintf("+%s", c) - } else { - res += fmt.Sprintf(" +%s", c) - } + content, err := ioutil.ReadFile(cgroupRoot + "/cgroup.controllers") + if err != nil { + return err } - resByte := []byte(res) + ctrs := bytes.Fields(content) + res := append([]byte("+"), bytes.Join(ctrs, []byte(" +"))...) current := "/sys/fs" elements := strings.Split(path, "/") @@ -194,8 +187,8 @@ func createCgroupv2Path(path string) (deferredError error) { // We enable the controllers for all the path components except the last one. It is not allowed to add // PIDs if there are already enabled controllers. if i < len(elements[3:])-1 { - if err := ioutil.WriteFile(filepath.Join(current, "cgroup.subtree_control"), resByte, 0755); err != nil { - return errors.Wrapf(err, "write %s", filepath.Join(current, "cgroup.subtree_control")) + if err := ioutil.WriteFile(filepath.Join(current, "cgroup.subtree_control"), res, 0755); err != nil { + return err } } } |