DMZ_OFFLINE
set_bit(DMZ_OFFLINE, &zone->flags);
set_bit(DMZ_OFFLINE, &zone->flags);
set_bit(DMZ_OFFLINE, &zone->flags);
clear_bit(DMZ_OFFLINE, &zone->flags);
set_bit(DMZ_OFFLINE, &zone->flags);
#define dmz_is_offline(z) test_bit(DMZ_OFFLINE, &(z)->flags)