139 	dce_t	*dce, *nextdce;  in dcb_reclaim()  local
147 	for (dce = dcb->dcb_dce; dce != NULL; dce = nextdce) {  in dcb_reclaim()
148 		nextdce = dce->dce_next;  in dcb_reclaim()
150 		mutex_enter(&dce->dce_lock);  in dcb_reclaim()
151 		if ((dce->dce_flags & DCEF_PMTU) &&  in dcb_reclaim()
152 		    TICK_TO_SEC(ddi_get_lbolt64()) - dce->dce_last_change_time >  in dcb_reclaim()
154 			dce->dce_flags &= ~DCEF_PMTU;  in dcb_reclaim()
155 			mutex_exit(&dce->dce_lock);  in dcb_reclaim()
156 			dce_increment_generation(dce);  in dcb_reclaim()
158 			mutex_exit(&dce->dce_lock);  in dcb_reclaim()
162 			hash = RANDOM_HASH((uint64_t)((uintptr_t)dce | seed));  in dcb_reclaim()
164 			if (dce->dce_flags & DCEF_PMTU) {  in dcb_reclaim()
178 		dce_delete_locked(dcb, dce);  in dcb_reclaim()
179 		dce_refrele(dce);  in dcb_reclaim()
342 	dce_t	*dce, *nextdce;  in dce_bucket_clean()  local
346 	for (dce = dcb->dcb_dce; dce != NULL; dce = nextdce) {  in dce_bucket_clean()
347 		nextdce = dce->dce_next;  in dce_bucket_clean()
348 		if ((!specific_ifindex) || dce->dce_ifindex == ifindex) {  in dce_bucket_clean()
349 			dce_delete_locked(dcb, dce);  in dce_bucket_clean()
350 			dce_refrele(dce);  in dce_bucket_clean()
384 	dce_t		*dce;  in dce_get_default()  local
386 	dce = ipst->ips_dce_default;  in dce_get_default()
387 	dce_refhold(dce);  in dce_get_default()
388 	return (dce);  in dce_get_default()
439 	dce_t		*dce;  in dce_lookup_v4()  local
448 	for (dce = dcb->dcb_dce; dce != NULL; dce = dce->dce_next) {  in dce_lookup_v4()
449 		if (dce->dce_v4addr == dst) {  in dce_lookup_v4()
450 			mutex_enter(&dce->dce_lock);  in dce_lookup_v4()
451 			if (!DCE_IS_CONDEMNED(dce)) {  in dce_lookup_v4()
452 				dce_refhold(dce);  in dce_lookup_v4()
454 					*generationp = dce->dce_generation;  in dce_lookup_v4()
455 				mutex_exit(&dce->dce_lock);  in dce_lookup_v4()
457 				return (dce);  in dce_lookup_v4()
459 			mutex_exit(&dce->dce_lock);  in dce_lookup_v4()
464 	dce = ipst->ips_dce_default;  in dce_lookup_v4()
465 	dce_refhold(dce);  in dce_lookup_v4()
466 	return (dce);  in dce_lookup_v4()
480 	dce_t		*dce;  in dce_lookup_v6()  local
489 	for (dce = dcb->dcb_dce; dce != NULL; dce = dce->dce_next) {  in dce_lookup_v6()
490 		if (IN6_ARE_ADDR_EQUAL(&dce->dce_v6addr, dst) &&  in dce_lookup_v6()
491 		    dce->dce_ifindex == ifindex) {  in dce_lookup_v6()
492 			mutex_enter(&dce->dce_lock);  in dce_lookup_v6()
493 			if (!DCE_IS_CONDEMNED(dce)) {  in dce_lookup_v6()
494 				dce_refhold(dce);  in dce_lookup_v6()
496 					*generationp = dce->dce_generation;  in dce_lookup_v6()
497 				mutex_exit(&dce->dce_lock);  in dce_lookup_v6()
499 				return (dce);  in dce_lookup_v6()
501 			mutex_exit(&dce->dce_lock);  in dce_lookup_v6()
506 	dce = ipst->ips_dce_default;  in dce_lookup_v6()
507 	dce_refhold(dce);  in dce_lookup_v6()
508 	return (dce);  in dce_lookup_v6()
522 	dce_t		*dce;  in dce_lookup_and_add_v4()  local
533 	for (dce = dcb->dcb_dce; dce != NULL; dce = dce->dce_next) {  in dce_lookup_and_add_v4()
534 		if (dce->dce_v4addr == dst) {  in dce_lookup_and_add_v4()
535 			mutex_enter(&dce->dce_lock);  in dce_lookup_and_add_v4()
536 			if (!DCE_IS_CONDEMNED(dce)) {  in dce_lookup_and_add_v4()
537 				dce_refhold(dce);  in dce_lookup_and_add_v4()
538 				mutex_exit(&dce->dce_lock);  in dce_lookup_and_add_v4()
540 				return (dce);  in dce_lookup_and_add_v4()
542 			mutex_exit(&dce->dce_lock);  in dce_lookup_and_add_v4()
545 	dce = kmem_cache_alloc(dce_cache, KM_NOSLEEP);  in dce_lookup_and_add_v4()
546 	if (dce == NULL) {  in dce_lookup_and_add_v4()
550 	bzero(dce, sizeof (dce_t));  in dce_lookup_and_add_v4()
551 	dce->dce_ipst = ipst;	/* No netstack_hold */  in dce_lookup_and_add_v4()
552 	dce->dce_v4addr = dst;  in dce_lookup_and_add_v4()
553 	dce->dce_generation = DCE_GENERATION_INITIAL;  in dce_lookup_and_add_v4()
554 	dce->dce_ipversion = IPV4_VERSION;  in dce_lookup_and_add_v4()
555 	dce->dce_last_change_time = TICK_TO_SEC(ddi_get_lbolt64());  in dce_lookup_and_add_v4()
556 	dce_refhold(dce);	/* For the hash list */  in dce_lookup_and_add_v4()
560 		dcb->dcb_dce->dce_ptpn = &dce->dce_next;  in dce_lookup_and_add_v4()
561 	dce->dce_next = dcb->dcb_dce;  in dce_lookup_and_add_v4()
562 	dce->dce_ptpn = &dcb->dcb_dce;  in dce_lookup_and_add_v4()
563 	dcb->dcb_dce = dce;  in dce_lookup_and_add_v4()
564 	dce->dce_bucket = dcb;  in dce_lookup_and_add_v4()
566 	dce_refhold(dce);	/* For the caller */  in dce_lookup_and_add_v4()
570 	dce->dce_ident = ipst->ips_dce_default->dce_ident + 1;  in dce_lookup_and_add_v4()
573 	return (dce);  in dce_lookup_and_add_v4()
588 	dce_t		*dce;  in dce_lookup_and_add_v6()  local
602 	for (dce = dcb->dcb_dce; dce != NULL; dce = dce->dce_next) {  in dce_lookup_and_add_v6()
603 		if (IN6_ARE_ADDR_EQUAL(&dce->dce_v6addr, dst) &&  in dce_lookup_and_add_v6()
604 		    dce->dce_ifindex == ifindex) {  in dce_lookup_and_add_v6()
605 			mutex_enter(&dce->dce_lock);  in dce_lookup_and_add_v6()
606 			if (!DCE_IS_CONDEMNED(dce)) {  in dce_lookup_and_add_v6()
607 				dce_refhold(dce);  in dce_lookup_and_add_v6()
608 				mutex_exit(&dce->dce_lock);  in dce_lookup_and_add_v6()
610 				return (dce);  in dce_lookup_and_add_v6()
612 			mutex_exit(&dce->dce_lock);  in dce_lookup_and_add_v6()
616 	dce = kmem_cache_alloc(dce_cache, KM_NOSLEEP);  in dce_lookup_and_add_v6()
617 	if (dce == NULL) {  in dce_lookup_and_add_v6()
621 	bzero(dce, sizeof (dce_t));  in dce_lookup_and_add_v6()
622 	dce->dce_ipst = ipst;	/* No netstack_hold */  in dce_lookup_and_add_v6()
623 	dce->dce_v6addr = *dst;  in dce_lookup_and_add_v6()
624 	dce->dce_ifindex = ifindex;  in dce_lookup_and_add_v6()
625 	dce->dce_generation = DCE_GENERATION_INITIAL;  in dce_lookup_and_add_v6()
626 	dce->dce_ipversion = IPV6_VERSION;  in dce_lookup_and_add_v6()
627 	dce->dce_last_change_time = TICK_TO_SEC(ddi_get_lbolt64());  in dce_lookup_and_add_v6()
628 	dce_refhold(dce);	/* For the hash list */  in dce_lookup_and_add_v6()
632 		dcb->dcb_dce->dce_ptpn = &dce->dce_next;  in dce_lookup_and_add_v6()
633 	dce->dce_next = dcb->dcb_dce;  in dce_lookup_and_add_v6()
634 	dce->dce_ptpn = &dcb->dcb_dce;  in dce_lookup_and_add_v6()
635 	dcb->dcb_dce = dce;  in dce_lookup_and_add_v6()
636 	dce->dce_bucket = dcb;  in dce_lookup_and_add_v6()
638 	dce_refhold(dce);	/* For the caller */  in dce_lookup_and_add_v6()
642 	dce->dce_ident = ipst->ips_dce_default->dce_ident + 1;  in dce_lookup_and_add_v6()
644 	return (dce);  in dce_lookup_and_add_v6()
656 dce_setuinfo(dce_t *dce, iulp_t *uinfo)  in dce_setuinfo()  argument
664 	mutex_enter(&dce->dce_lock);  in dce_setuinfo()
671 		if (dce->dce_uinfo.iulp_rtt != 0) {  in dce_setuinfo()
672 			dce->dce_uinfo.iulp_rtt = (dce->dce_uinfo.iulp_rtt +  in dce_setuinfo()
675 			dce->dce_uinfo.iulp_rtt = uinfo->iulp_rtt +  in dce_setuinfo()
678 		if (dce->dce_uinfo.iulp_rtt_sd != 0) {  in dce_setuinfo()
679 			dce->dce_uinfo.iulp_rtt_sd =  in dce_setuinfo()
680 			    (dce->dce_uinfo.iulp_rtt_sd +  in dce_setuinfo()
683 			dce->dce_uinfo.iulp_rtt_sd = uinfo->iulp_rtt_sd +  in dce_setuinfo()
688 		if (dce->dce_flags & DCEF_PMTU) {  in dce_setuinfo()
689 			dce->dce_pmtu = MIN(uinfo->iulp_mtu, dce->dce_pmtu);  in dce_setuinfo()
691 			dce->dce_pmtu = MIN(uinfo->iulp_mtu, IP_MAXPACKET);  in dce_setuinfo()
692 			dce->dce_flags |= DCEF_PMTU;  in dce_setuinfo()
694 		dce->dce_last_change_time = TICK_TO_SEC(ddi_get_lbolt64());  in dce_setuinfo()
697 		if (dce->dce_uinfo.iulp_ssthresh != 0)  in dce_setuinfo()
698 			dce->dce_uinfo.iulp_ssthresh =  in dce_setuinfo()
700 			    dce->dce_uinfo.iulp_ssthresh) >> 1;  in dce_setuinfo()
702 			dce->dce_uinfo.iulp_ssthresh = uinfo->iulp_ssthresh;  in dce_setuinfo()
705 	dce->dce_flags |= DCEF_UINFO;  in dce_setuinfo()
706 	mutex_exit(&dce->dce_lock);  in dce_setuinfo()
713 	dce_t *dce;  in dce_update_uinfo_v4()  local
715 	dce = dce_lookup_and_add_v4(dst, ipst);  in dce_update_uinfo_v4()
716 	if (dce == NULL)  in dce_update_uinfo_v4()
719 	dce_setuinfo(dce, uinfo);  in dce_update_uinfo_v4()
720 	dce_refrele(dce);  in dce_update_uinfo_v4()
728 	dce_t *dce;  in dce_update_uinfo_v6()  local
730 	dce = dce_lookup_and_add_v6(dst, ifindex, ipst);  in dce_update_uinfo_v6()
731 	if (dce == NULL)  in dce_update_uinfo_v6()
734 	dce_setuinfo(dce, uinfo);  in dce_update_uinfo_v6()
735 	dce_refrele(dce);  in dce_update_uinfo_v6()
755 dce_make_condemned(dce_t *dce)  in dce_make_condemned()  argument
757 	ip_stack_t	*ipst = dce->dce_ipst;  in dce_make_condemned()
759 	mutex_enter(&dce->dce_lock);  in dce_make_condemned()
760 	ASSERT(!DCE_IS_CONDEMNED(dce));  in dce_make_condemned()
761 	dce->dce_generation = DCE_GENERATION_CONDEMNED;  in dce_make_condemned()
762 	mutex_exit(&dce->dce_lock);  in dce_make_condemned()
771 dce_increment_generation(dce_t *dce)  in dce_increment_generation()  argument
775 	mutex_enter(&dce->dce_lock);  in dce_increment_generation()
776 	if (!DCE_IS_CONDEMNED(dce)) {  in dce_increment_generation()
777 		generation = dce->dce_generation + 1;  in dce_increment_generation()
781 		dce->dce_generation = generation;  in dce_increment_generation()
783 	mutex_exit(&dce->dce_lock);  in dce_increment_generation()
795 	dce_t		*dce;  in dce_increment_all_generations()  local
803 		for (dce = dcb->dcb_dce; dce != NULL; dce = dce->dce_next) {  in dce_increment_all_generations()
804 			if (DCE_IS_CONDEMNED(dce))  in dce_increment_all_generations()
806 			dce_increment_generation(dce);  in dce_increment_all_generations()
818 dce_delete_locked(dcb_t *dcb, dce_t *dce)  in dce_delete_locked()  argument
820 	dce->dce_bucket = NULL;  in dce_delete_locked()
821 	*dce->dce_ptpn = dce->dce_next;  in dce_delete_locked()
822 	if (dce->dce_next != NULL)  in dce_delete_locked()
823 		dce->dce_next->dce_ptpn = dce->dce_ptpn;  in dce_delete_locked()
824 	dce->dce_ptpn = NULL;  in dce_delete_locked()
825 	dce->dce_next = NULL;  in dce_delete_locked()
827 	dce_make_condemned(dce);  in dce_delete_locked()
831 dce_inactive(dce_t *dce)  in dce_inactive()  argument
833 	ip_stack_t	*ipst = dce->dce_ipst;  in dce_inactive()
835 	ASSERT(!(dce->dce_flags & DCEF_DEFAULT));  in dce_inactive()
836 	ASSERT(dce->dce_ptpn == NULL);  in dce_inactive()
837 	ASSERT(dce->dce_bucket == NULL);  in dce_inactive()
840 	if (DCE_IS_CONDEMNED(dce))  in dce_inactive()
843 	kmem_cache_free(dce_cache, dce);  in dce_inactive()
847 dce_refrele(dce_t *dce)  in dce_refrele()  argument
849 	ASSERT(dce->dce_refcnt != 0);  in dce_refrele()
850 	if (atomic_dec_32_nv(&dce->dce_refcnt) == 0)  in dce_refrele()
851 		dce_inactive(dce);  in dce_refrele()
855 dce_refhold(dce_t *dce)  in dce_refhold()  argument
857 	atomic_inc_32(&dce->dce_refcnt);  in dce_refhold()
858 	ASSERT(dce->dce_refcnt != 0);  in dce_refhold()
863 dce_refrele_notr(dce_t *dce)  in dce_refrele_notr()  argument
865 	ASSERT(dce->dce_refcnt != 0);  in dce_refrele_notr()
866 	if (atomic_dec_32_nv(&dce->dce_refcnt) == 0)  in dce_refrele_notr()
867 		dce_inactive(dce);  in dce_refrele_notr()
871 dce_refhold_notr(dce_t *dce)  in dce_refhold_notr()  argument
873 	atomic_inc_32(&dce->dce_refcnt);  in dce_refhold_notr()
874 	ASSERT(dce->dce_refcnt != 0);  in dce_refhold_notr()
885 	dce_t			*dce;  in ip_snmp_get_mib2_ip_dce()  local
906 		for (dce = dcb->dcb_dce; dce != NULL; dce = dce->dce_next) {  in ip_snmp_get_mib2_ip_dce()
907 			dest_cache.DestIpv4Address = dce->dce_v4addr;  in ip_snmp_get_mib2_ip_dce()
908 			dest_cache.DestFlags = dce->dce_flags;  in ip_snmp_get_mib2_ip_dce()
909 			if (dce->dce_flags & DCEF_PMTU)  in ip_snmp_get_mib2_ip_dce()
910 				dest_cache.DestPmtu = dce->dce_pmtu;  in ip_snmp_get_mib2_ip_dce()
913 			dest_cache.DestIdent = dce->dce_ident;  in ip_snmp_get_mib2_ip_dce()
916 			    dce->dce_last_change_time;  in ip_snmp_get_mib2_ip_dce()
948 		for (dce = dcb->dcb_dce; dce != NULL; dce = dce->dce_next) {  in ip_snmp_get_mib2_ip_dce()
949 			dest_cache.DestIpv6Address = dce->dce_v6addr;  in ip_snmp_get_mib2_ip_dce()
950 			dest_cache.DestFlags = dce->dce_flags;  in ip_snmp_get_mib2_ip_dce()
951 			if (dce->dce_flags & DCEF_PMTU)  in ip_snmp_get_mib2_ip_dce()
952 				dest_cache.DestPmtu = dce->dce_pmtu;  in ip_snmp_get_mib2_ip_dce()
955 			dest_cache.DestIdent = dce->dce_ident;  in ip_snmp_get_mib2_ip_dce()
956 			if (IN6_IS_ADDR_LINKSCOPE(&dce->dce_v6addr))  in ip_snmp_get_mib2_ip_dce()
957 				dest_cache.DestIfindex = dce->dce_ifindex;  in ip_snmp_get_mib2_ip_dce()
961 			    dce->dce_last_change_time;  in ip_snmp_get_mib2_ip_dce()