--- zzzz-none-000/linux-4.4.271/include/net/netfilter/nf_conntrack_ecache.h	2021-06-03 06:22:09.000000000 +0000
+++ hawkeye-5590-750/linux-4.4.271/include/net/netfilter/nf_conntrack_ecache.h	2023-04-19 10:22:30.000000000 +0000
@@ -63,6 +63,12 @@
 	int report;
 };
 
+#ifdef CONFIG_NF_CONNTRACK_CHAIN_EVENTS
+extern int nf_conntrack_register_notifier(struct net *net,
+					  struct notifier_block *nb);
+extern int nf_conntrack_unregister_notifier(struct net *net,
+					    struct notifier_block *nb);
+#else
 struct nf_ct_event_notifier {
 	int (*fcn)(unsigned int events, struct nf_ct_event *item);
 };
@@ -71,17 +77,20 @@
 				   struct nf_ct_event_notifier *nb);
 void nf_conntrack_unregister_notifier(struct net *net,
 				      struct nf_ct_event_notifier *nb);
+#endif
 
 void nf_ct_deliver_cached_events(struct nf_conn *ct);
 
 static inline void
 nf_conntrack_event_cache(enum ip_conntrack_events event, struct nf_conn *ct)
 {
-	struct net *net = nf_ct_net(ct);
 	struct nf_conntrack_ecache *e;
+#ifndef CONFIG_NF_CONNTRACK_CHAIN_EVENTS
+	struct net *net = nf_ct_net(ct);
 
 	if (!rcu_access_pointer(net->ct.nf_conntrack_event_cb))
 		return;
+#endif
 
 	e = nf_ct_ecache_find(ct);
 	if (e == NULL)
@@ -90,6 +99,39 @@
 	set_bit(event, &e->cache);
 }
 
+#ifdef CONFIG_NF_CONNTRACK_CHAIN_EVENTS
+static inline int
+nf_conntrack_eventmask_report(unsigned int eventmask,
+			      struct nf_conn *ct,
+			      u32 portid,
+			      int report)
+{
+	struct nf_conntrack_ecache *e;
+	struct net *net = nf_ct_net(ct);
+
+	e = nf_ct_ecache_find(ct);
+	if (e == NULL)
+		return 0;
+
+	if (nf_ct_is_confirmed(ct) && !nf_ct_is_dying(ct)) {
+		struct nf_ct_event item = {
+			.ct = ct,
+			.portid = e->portid ? e->portid : portid,
+			.report = report
+		};
+		/* This is a resent of a destroy event? If so, skip missed */
+		unsigned long missed = e->portid ? 0 : e->missed;
+
+		if (!((eventmask | missed) & e->ctmask))
+			return 0;
+
+		atomic_notifier_call_chain(&net->ct.nf_conntrack_chain,
+					   eventmask | missed, &item);
+	}
+
+	return 0;
+}
+#else
 static inline int
 nf_conntrack_eventmask_report(unsigned int eventmask,
 			      struct nf_conn *ct,
@@ -143,6 +185,7 @@
 	rcu_read_unlock();
 	return ret;
 }
+#endif
 
 static inline int
 nf_conntrack_event_report(enum ip_conntrack_events event, struct nf_conn *ct,