eib_vnic_modify_enter
eib_vnic_modify_enter(ss, EIB_VN_BEING_MODIFIED);
eib_vnic_modify_enter(ss, EIB_VN_BEING_DELETED);
static void eib_vnic_modify_enter(eib_t *, uint_t);
eib_vnic_modify_enter(ss, EIB_VN_BEING_CREATED);