--- zzzz-none-000/linux-4.4.271/net/netfilter/nf_conntrack_netlink.c	2021-06-03 06:22:09.000000000 +0000
+++ maple-fsgw-759/linux-4.4.271/net/netfilter/nf_conntrack_netlink.c	2023-12-20 10:37:40.000000000 +0000
@@ -28,6 +28,9 @@
 #include <linux/netlink.h>
 #include <linux/spinlock.h>
 #include <linux/interrupt.h>
+#ifdef CONFIG_NF_CONNTRACK_CHAIN_EVENTS
+#include <linux/notifier.h>
+#endif
 #include <linux/slab.h>
 #include <linux/siphash.h>
 
@@ -634,19 +637,27 @@
 }
 
 #ifdef CONFIG_NF_CONNTRACK_EVENTS
+#ifdef CONFIG_NF_CONNTRACK_CHAIN_EVENTS
+static int ctnetlink_conntrack_event(struct notifier_block *this,
+				     unsigned long events, void *ptr)
+#else
 static int
 ctnetlink_conntrack_event(unsigned int events, struct nf_ct_event *item)
+#endif
 {
 	const struct nf_conntrack_zone *zone;
 	struct net *net;
 	struct nlmsghdr *nlh;
 	struct nfgenmsg *nfmsg;
 	struct nlattr *nest_parms;
-	struct nf_conn *ct = item->ct;
 	struct sk_buff *skb;
 	unsigned int type;
 	unsigned int flags = 0, group;
 	int err;
+#ifdef CONFIG_NF_CONNTRACK_CHAIN_EVENTS
+	struct nf_ct_event *item = (struct nf_ct_event *)ptr;
+#endif
+	struct nf_conn *ct = item->ct;
 
 	/* ignore our fake conntrack entry */
 	if (nf_ct_is_untracked(ct))
@@ -3292,9 +3303,15 @@
 }
 
 #ifdef CONFIG_NF_CONNTRACK_EVENTS
+#ifdef CONFIG_NF_CONNTRACK_CHAIN_EVENTS
+static struct notifier_block ctnl_notifier = {
+	.notifier_call = ctnetlink_conntrack_event,
+};
+#else
 static struct nf_ct_event_notifier ctnl_notifier = {
 	.fcn = ctnetlink_conntrack_event,
 };
+#endif
 
 static struct nf_exp_event_notifier ctnl_notifier_exp = {
 	.fcn = ctnetlink_expect_event,