def METHOD_NAME(self):
    """
    Validate existance of cgroup component dirs.
    Return True if all the components dir exist and have good permission,
    otherwise return False.
    """
    for comp in self.required_comps():
        if comp not in self.compdirs:
            return False
        compdir = self.compdirs[comp]
        fullpath = os.path.join(self.mount_point, comp, compdir, 'gpdb')
        if not os.access(fullpath, os.R_OK | os.W_OK | os.X_OK):
            return False
    return True