cas_control_data
CTASSERT((offsetof(struct cas_control_data, m) & ((a) - 1)) == 0)
sizeof(struct cas_control_data), 1,
sizeof(struct cas_control_data), 0,
sc->sc_control_data, sizeof(struct cas_control_data),
struct cas_control_data *sc_control_data;
#define CAS_CDOFF(x) offsetof(struct cas_control_data, x)