FSS_ACTIVE
if (isset(sc->sc_copied, cl) || sc->sc_state != FSS_ACTIVE) {
is_valid = (sc->sc_state == FSS_ACTIVE);
is_valid = (sc->sc_state == FSS_ACTIVE);
if (write || sc->sc_state != FSS_ACTIVE) {
KASSERT(sc->sc_state == FSS_ACTIVE);
} else if (sc->sc_state != FSS_ACTIVE) {
if (sc->sc_state != FSS_ACTIVE) {
sc->sc_state = FSS_ACTIVE;
sc->sc_state = FSS_ACTIVE;