Symbol: HFSC_DEL_FILTER
sys/altq/altq_hfsc.c
1985
case HFSC_DEL_FILTER:
usr.sbin/altq/libaltq/qop_hfsc.c
1170
if (ioctl(hfsc_fd, HFSC_DEL_FILTER, &fltr_del) < 0)