def _hasdev(devclass):
"""check for existence of device, attempting to load kernel
module if not present"""
devname = '%s0' % devclass
rth = getrth()
if rth.getlink(devname):
return True
if util.modprobe(devclass) and rth.getlink(devname):
return True
return False
def setup(self):
"""install Remus plug on VIF outbound traffic"""
self.bufdev = self.pool.get()
devname = self.bufdev.devname
bufdev = self.rth.getlink(devname)
if not bufdev:
raise BufferedNICException('could not find device %s' % devname)
self.bufdev.install(self.vif)
self.bufdevno = bufdev['index']
self.handle = qdisc.TC_H_ROOT
self.q = qdisc.PlugQdisc()
if not util.modprobe('sch_plug'):
raise BufferedNICException('could not load sch_plug module')