debug prints

net/ipv4/udp.c

@@ -1774,9 +1774,21 @@ int __udp4_lib_rcv(struct sk_buff *skb, struct udp_table *udptable,
 	saddr = ip_hdr(skb)->saddr;
 	daddr = ip_hdr(skb)->daddr;
 
+#ifdef CONFIG_XEN_SME
+	memset(dbg_buff, 0, DBG_BUF_SIZE);
+	sprintf(dbg_buff, "%s:%d caller: %pS", __func__, __LINE__,
+			__builtin_return_address(0));
+	xsl_print_sk_buff(skb, dbg_buff);
+#endif
 	if (ulen > skb->len)
 		goto short_packet;
 
+#ifdef CONFIG_XEN_SME
+	memset(dbg_buff, 0, DBG_BUF_SIZE);
+	sprintf(dbg_buff, "%s:%d caller: %pS", __func__, __LINE__,
+			__builtin_return_address(0));
+	xsl_print_sk_buff(skb, dbg_buff);
+#endif
 	if (proto == IPPROTO_UDP) {
 		/* UDP validates ulen. */
 		if (ulen < sizeof(*uh) || pskb_trim_rcsum(skb, ulen))
@@ -1784,10 +1796,22 @@ int __udp4_lib_rcv(struct sk_buff *skb, struct udp_table *udptable,
 		uh = udp_hdr(skb);
 	}
 
+#ifdef CONFIG_XEN_SME
+	memset(dbg_buff, 0, DBG_BUF_SIZE);
+	sprintf(dbg_buff, "%s:%d caller: %pS", __func__, __LINE__,
+			__builtin_return_address(0));
+	xsl_print_sk_buff(skb, dbg_buff);
+#endif
 	if (udp4_csum_init(skb, uh, proto))
 		goto csum_error;
 
 	sk = skb_steal_sock(skb);
+#ifdef CONFIG_XEN_SME
+	memset(dbg_buff, 0, DBG_BUF_SIZE);
+	sprintf(dbg_buff, "%s:%d caller: %pS, STEAL SK: %p", __func__, __LINE__,
+			__builtin_return_address(0), sk);
+	xsl_print_sk_buff(skb, dbg_buff);
+#endif
 	if (sk) {
 		struct dst_entry *dst = skb_dst(skb);
 		int ret;
@@ -1810,6 +1834,12 @@ int __udp4_lib_rcv(struct sk_buff *skb, struct udp_table *udptable,
 						saddr, daddr, udptable, proto);
 
 	sk = __udp4_lib_lookup_skb(skb, uh->source, uh->dest, udptable);
+#ifdef CONFIG_XEN_SME
+	memset(dbg_buff, 0, DBG_BUF_SIZE);
+	sprintf(dbg_buff, "%s:%d caller: %pS, LOOKUP SK: %p", __func__, __LINE__,
+			__builtin_return_address(0), sk);
+	xsl_print_sk_buff(skb, dbg_buff);
+#endif
 	if (sk) {
 		int ret;