213 	struct ip_moptions      imo;                    /* ip_moptions */  member
272     struct ip_moptions *imo, struct ip_out_args *ipoa)  in ip_output()  argument
274 	return ip_output_list(m0, 0, opt, ro, flags, imo, ipoa);  in ip_output()
292     struct route *ro, int flags, struct ip_moptions *imo,  in ip_output_list()  argument
400 		imo = NULL;  in ip_output_list()
678 	    imo != NULL && (ifp = imo->imo_multicast_ifp) != NULL) {  in ip_output_list()
923 		if (imo != NULL) {  in ip_output_list()
924 			IMO_LOCK(imo);  in ip_output_list()
925 			vif = imo->imo_multicast_vif;  in ip_output_list()
926 			ttl = imo->imo_multicast_ttl;  in ip_output_list()
927 			loop = imo->imo_multicast_loop;  in ip_output_list()
931 			if (imo->imo_multicast_ifp != NULL) {  in ip_output_list()
932 				ifp = imo->imo_multicast_ifp;  in ip_output_list()
934 			IMO_UNLOCK(imo);  in ip_output_list()
942 		if (imo == NULL || vif == -1) {  in ip_output_list()
978 		if (inm != NULL && (imo == NULL || loop)) {  in ip_output_list()
992 				if (imo != NULL) {  in ip_output_list()
2894 imo_addref(struct ip_moptions *imo, int locked)  in imo_addref()  argument
2897 		IMO_LOCK(imo);  in imo_addref()
2899 		IMO_LOCK_ASSERT_HELD(imo);  in imo_addref()
2902 	if (++imo->imo_refcnt == 0) {  in imo_addref()
2903 		panic("%s: imo %p wraparound refcnt", __func__, imo);  in imo_addref()
2905 	} else if (imo->imo_trace != NULL) {  in imo_addref()
2906 		(*imo->imo_trace)(imo, TRUE);  in imo_addref()
2910 		IMO_UNLOCK(imo);  in imo_addref()
2915 imo_remref(struct ip_moptions *imo)  in imo_remref()  argument
2917 	IMO_LOCK(imo);  in imo_remref()
2918 	if (imo->imo_refcnt == 0) {  in imo_remref()
2919 		panic("%s: imo %p negative refcnt", __func__, imo);  in imo_remref()
2921 	} else if (imo->imo_trace != NULL) {  in imo_remref()
2922 		(*imo->imo_trace)(imo, FALSE);  in imo_remref()
2925 	--imo->imo_refcnt;  in imo_remref()
2926 	if (imo->imo_refcnt > 0) {  in imo_remref()
2927 		IMO_UNLOCK(imo);  in imo_remref()
2931 	IMO_PURGE_LOCKED(imo);  in imo_remref()
2933 	IMO_UNLOCK(imo);  in imo_remref()
2935 	kfree_type_counted_by(struct in_multi *, imo->imo_max_memberships, imo->imo_membership);  in imo_remref()
2936 	kfree_type_counted_by(struct in_mfilter, imo->imo_max_filters, imo->imo_mfilters);  in imo_remref()
2938 	lck_mtx_destroy(&imo->imo_lock, &ifa_mtx_grp);  in imo_remref()
2940 	if (!(imo->imo_debug & IFD_ALLOC)) {  in imo_remref()
2941 		panic("%s: imo %p cannot be freed", __func__, imo);  in imo_remref()
2944 	zfree(imo_zone, imo);  in imo_remref()
2948 imo_trace(struct ip_moptions *imo, int refhold)  in imo_trace()  argument
2950 	struct ip_moptions_dbg *imo_dbg = (struct ip_moptions_dbg *)imo;  in imo_trace()
2955 	if (!(imo->imo_debug & IFD_DEBUG)) {  in imo_trace()
2956 		panic("%s: imo %p has no debug structure", __func__, imo);  in imo_trace()
2974 	struct ip_moptions *imo;  in ip_allocmoptions()  local
2976 	imo = zalloc_flags(imo_zone, how | Z_ZERO);  in ip_allocmoptions()
2977 	if (imo != NULL) {  in ip_allocmoptions()
2978 		lck_mtx_init(&imo->imo_lock, &ifa_mtx_grp, &ifa_mtx_attr);  in ip_allocmoptions()
2979 		imo->imo_debug |= IFD_ALLOC;  in ip_allocmoptions()
2981 			imo->imo_debug |= IFD_DEBUG;  in ip_allocmoptions()
2982 			imo->imo_trace = imo_trace;  in ip_allocmoptions()
2984 		IMO_ADDREF(imo);  in ip_allocmoptions()
2987 	return imo;  in ip_allocmoptions()