kubernetes/vendor/github.com/opencontainers/runc/libcontainer/cgroups/fs2/freezer.go

func setFreezer(dirPath string, state configs.FreezerState) error { … }

func getFreezer(dirPath string) (configs.FreezerState, error) { … }

func readFreezer(dirPath string, fd *os.File) (configs.FreezerState, error) { … }

// waitFrozen polls cgroup.events until it sees "frozen 1" in it.
func waitFrozen(dirPath string) (configs.FreezerState, error) { … }