bsd/netinet6/nd6_nbr.c

1541 	struct dadq *dp;
1544 	for (dp = dadq.tqh_first; dp; dp = dp->dad_list.tqe_next) {
1545 		DAD_LOCK_SPIN(dp);
1546 		if (dp->dad_ifa == ifa) {
1547 			DAD_ADDREF_LOCKED(dp);
1548 			DAD_UNLOCK(dp);
1550 			return (dp);
1552 		DAD_UNLOCK(dp);
1575 	struct dadq *dp;
1605 	if ((dp = nd6_dad_find(ifa)) != NULL) {
1606 		DAD_REMREF(dp);
1611 	dp = zalloc(dad_zone);
1612 	if (dp == NULL) {
1619 	bzero(dp, dad_size);
1620 	lck_mtx_init(&dp->dad_lock, ifa_mtx_grp, ifa_mtx_attr);
1623 	dp = nd6_dad_attach(dp, ifa);
1640 		nd6_dad_ns_output(dp, ifa);
1661 	DAD_REMREF(dp);		/* drop our reference */
1665 nd6_dad_attach(struct dadq *dp, struct ifaddr *ifa)
1668 	DAD_LOCK(dp);
1669 	dp->dad_ifa = ifa;
1671 	dp->dad_count = ip6_dad_count;
1672 	dp->dad_ns_icount = dp->dad_na_icount = 0;
1673 	dp->dad_ns_ocount = dp->dad_ns_tcount = 0;
1674 	dp->dad_na_ixcount = 0;
1675 	VERIFY(!dp->dad_attached);
1676 	dp->dad_attached = 1;
1677 	DAD_ADDREF_LOCKED(dp);	/* for caller */
1678 	DAD_ADDREF_LOCKED(dp);	/* for dadq_head list */
1679 	TAILQ_INSERT_TAIL(&dadq, (struct dadq *)dp, dad_list);
1680 	DAD_UNLOCK(dp);
1683 	return (dp);
1687 nd6_dad_detach(struct dadq *dp, struct ifaddr *ifa)
1692 	DAD_LOCK(dp);
1693 	if ((detached = dp->dad_attached)) {
1694 		VERIFY(dp->dad_ifa == ifa);
1695 		TAILQ_REMOVE(&dadq, (struct dadq *)dp, dad_list);
1696 		dp->dad_list.tqe_next = NULL;
1697 		dp->dad_list.tqe_prev = NULL;
1698 		dp->dad_attached = 0;
1700 	DAD_UNLOCK(dp);
1703 		DAD_REMREF(dp);		/* drop dadq_head reference */
1713 	struct dadq *dp;
1715 	dp = nd6_dad_find(ifa);
1716 	if (!dp) {
1723 	nd6_dad_detach(dp, ifa);
1724 	DAD_REMREF(dp);		/* drop our reference */
1759 	struct dadq *dp = NULL;
1766 	dp = nd6_dad_find(ifa);
1767 	if (dp == NULL) {
1791 	DAD_LOCK(dp);
1792 	if (dp->dad_ns_tcount > dad_maxtry) {
1793 		DAD_UNLOCK(dp);
1797 		nd6_dad_detach(dp, ifa);
1802 	if (dp->dad_ns_ocount < dp->dad_count) {
1806 		DAD_UNLOCK(dp);
1810 		nd6_dad_ns_output(dp, ifa);
1828 		if (dp->dad_na_icount) {
1836 		if (dp->dad_ns_icount) {
1840 		DAD_UNLOCK(dp);
1843 			/* (*dp) will be freed in nd6_dad_duplicated() */
1865 			nd6_dad_detach(dp, ifa);
1870 	if (dp != NULL)
1871 		DAD_REMREF(dp);		/* drop our reference */
1878 	struct dadq *dp;
1882 	dp = nd6_dad_find(ifa);
1883 	if (dp == NULL) {
1889 	DAD_LOCK(dp);
1893 	    dp->dad_ns_icount, dp->dad_ns_ocount, dp->dad_na_icount,
1894 	    dp->dad_na_ixcount);
1895 	hwdupposs = dp->dad_na_ixcount;
1896 	DAD_UNLOCK(dp);
1927 	nd6_dad_detach(dp, ifa);
1928 	DAD_REMREF(dp);		/* drop our reference */
1932 nd6_dad_ns_output(struct dadq *dp, struct ifaddr *ifa)
1938 	DAD_LOCK(dp);
1939 	dp->dad_ns_tcount++;
1941 		DAD_UNLOCK(dp);
1945 		DAD_UNLOCK(dp);
1949 	dp->dad_ns_ocount++;
1950 	DAD_UNLOCK(dp);
1960 	struct dadq *dp;
1969 	dp = nd6_dad_find(ifa);
1987 	if (dp != NULL)
1988 		DAD_LOCK(dp);
1989 	if (dp == NULL || dp->dad_ns_ocount == 0)
1995 		if (dp != NULL) {
1996 			DAD_UNLOCK(dp);
1997 			DAD_REMREF(dp);
1998 			dp = NULL;
2001 	} else if (dp != NULL) {
2006 		dp->dad_ns_icount++;
2007 		DAD_UNLOCK(dp);
2008 		DAD_REMREF(dp);
2016 	struct dadq *dp;
2022 	dp = nd6_dad_find(ifa);
2023 	if (dp == NULL) {
2103 	DAD_LOCK_SPIN(dp);
2104 	dp->dad_na_icount++;
2106 		dp->dad_na_ixcount++;
2107 	DAD_UNLOCK(dp);
2108 	DAD_REMREF(dp);
2115 dad_addref(struct dadq *dp, int locked)
2118 		DAD_LOCK_SPIN(dp);
2120 		DAD_LOCK_ASSERT_HELD(dp);
2122 	if (++dp->dad_refcount == 0) {
2123 		panic("%s: dad %p wraparound refcnt\n", __func__, dp);
2127 		DAD_UNLOCK(dp);
2131 dad_remref(struct dadq *dp)
2135 	DAD_LOCK_SPIN(dp);
2136 	if (dp->dad_refcount == 0)
2137 		panic("%s: dad %p negative refcnt\n", __func__, dp);
2138 	--dp->dad_refcount;
2139 	if (dp->dad_refcount > 0) {
2140 		DAD_UNLOCK(dp);
2143 	DAD_UNLOCK(dp);
2145 	if (dp->dad_attached ||
2146 	    dp->dad_list.tqe_next != NULL || dp->dad_list.tqe_prev != NULL) {
2147 		panic("%s: attached dad=%p is being freed", __func__, dp);
2151 	if ((ifa = dp->dad_ifa) != NULL) {
2153 		dp->dad_ifa = NULL;
2156 	lck_mtx_destroy(&dp->dad_lock, ifa_mtx_grp);
2157 	zfree(dad_zone, dp);