NSF_ZONE_CREATE
nts->nts_flags = NSF_ZONE_CREATE;
nts->nts_flags &= ~NSF_ZONE_CREATE;
ns->netstack_flags |= NSF_ZONE_CREATE;
ASSERT(ns->netstack_flags & NSF_ZONE_CREATE);
ns->netstack_flags &= ~NSF_ZONE_CREATE;
while (ns->netstack_flags & NSF_ZONE_CREATE) {
(NSF_ZONE_CREATE|NSF_ZONE_SHUTDOWN|NSF_ZONE_DESTROY)