85 def fail(cond, msg):  function
99 def cmd(cmd, shell=True, include_stderr=False, background=False, fail=True):  argument
114 def cmd_result(proc, include_stderr=False, fail=False):  argument
146 def tool(name, args, flags, JSON=True, ns="", fail=True, include_stderr=False):  argument
173 def bpftool(args, JSON=True, ns="", fail=True, include_stderr=False):  argument
220                       fail=True, include_stderr=False, dev_bind=None):  argument
236 def ip(args, force=False, JSON=True, ns="", fail=True, include_stderr=False):  argument
242 def tc(args, JSON=True, ns="", fail=True, include_stderr=False):  argument
246 def ethtool(dev, opt, args, fail=True):  argument
415     def set_mtu(self, mtu, fail=True):  argument
420                 fail=True, include_stderr=False):  argument
428                   fail=True, include_stderr=False):  argument
488                       fail=True, include_stderr=False):  argument
505                            fail=True, include_stderr=False):  argument
522     def set_ethtool_tc_offloads(self, enable, fail=True):  argument