Function node_reclaim

freebsd/net80211/ieee80211_node.c:2210–2238

* Reclaim a node. If this is the last reference count then * do the normal free work. Otherwise remove it from the node * table and mark it gone by clearing the back-reference. */

 * table and mark it gone by clearing the back-reference.
 */
static void
node_reclaim(struct ieee80211_node_table *nt, struct ieee80211_node *ni)
{

	IEEE80211_NODE_LOCK_ASSERT(nt);

	IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE,
		"%s: remove %p<%s> from %s table, refcnt %d\n",
		__func__, ni, ether_sprintf(ni->ni_macaddr),
		nt->nt_name, ieee80211_node_refcnt(ni)-1);
	/*
	 * Clear any entry in the unicast key mapping table.
	 * We need to do it here so rx lookups don't find it
	 * in the mapping table even if it's not in the hash
	 * table.  We cannot depend on the mapping table entry
	 * being cleared because the node may not be free'd.
	 */
	(void)node_clear_keyixmap(nt, ni);
	if (!ieee80211_node_dectestref(ni)) {
		/*
		 * Other references are present, just remove the
		 * node from the table so it cannot be found.  When
		 * the references are dropped storage will be
		 * reclaimed.
		 */
		ieee80211_del_node_nt(nt, ni);
	} else
		_ieee80211_free_node(ni);
}

/*
 * Node table support.