--- zzzz-none-000/linux-4.4.271/net/ipv4/ip_forward.c	2021-06-03 06:22:09.000000000 +0000
+++ hawkeye-5590-750/linux-4.4.271/net/ipv4/ip_forward.c	2023-04-19 10:22:30.000000000 +0000
@@ -39,6 +39,11 @@
 #include <net/route.h>
 #include <net/xfrm.h>
 
+#include <avm/pa/avm_pa.h>
+
+int sysctl_ip_use_legacy_tos __read_mostly = 1;
+EXPORT_SYMBOL(sysctl_ip_use_legacy_tos);
+
 static bool ip_exceeds_mtu(const struct sk_buff *skb, unsigned int mtu)
 {
 	if (skb->len <= mtu)
@@ -72,6 +77,7 @@
 		ip_forward_options(skb);
 
 	skb_sender_cpu_clear(skb);
+	avm_pa_mark_routed(skb);
 	return dst_output(net, sk, skb);
 }
 
@@ -143,7 +149,11 @@
 	    !skb_sec_path(skb))
 		ip_rt_send_redirect(skb);
 
-	skb->priority = rt_tos2priority(iph->tos);
+	/*
+	 * Set skb priority using legacy ToS method if required.
+	 */
+	if (sysctl_ip_use_legacy_tos != 0)
+		skb->priority = rt_tos2priority(iph->tos);
 
 	return NF_HOOK(NFPROTO_IPV4, NF_INET_FORWARD,
 		       net, NULL, skb, skb->dev, rt->dst.dev,