[UDP]: Restore missing inDatagrams increments

The previous move of the the UDP inDatagrams counter caused the
counting of encapsulated packets, SUNRPC data (as opposed to call)
packets and RXRPC packets to go missing.

This patch restores all of these.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/include/net/udp.h b/include/net/udp.h
index 98755eb..98cb09c 100644
--- a/include/net/udp.h
+++ b/include/net/udp.h
@@ -139,6 +139,12 @@
 				   int (*push_pending_frames)(struct sock *));
 
 DECLARE_SNMP_STAT(struct udp_mib, udp_statistics);
+DECLARE_SNMP_STAT(struct udp_mib, udp_stats_in6);
+
+/* UDP-Lite does not have a standardized MIB yet, so we inherit from UDP */
+DECLARE_SNMP_STAT(struct udp_mib, udplite_statistics);
+DECLARE_SNMP_STAT(struct udp_mib, udplite_stats_in6);
+
 /*
  * 	SNMP statistics for UDP and UDP-Lite
  */
@@ -149,6 +155,25 @@
 	if (is_udplite) SNMP_INC_STATS_BH(udplite_statistics, field);         \
 	else		SNMP_INC_STATS_BH(udp_statistics, field);    }  while(0)
 
+#define UDP6_INC_STATS_BH(field, is_udplite) 			      do  {  \
+	if (is_udplite) SNMP_INC_STATS_BH(udplite_stats_in6, field);         \
+	else		SNMP_INC_STATS_BH(udp_stats_in6, field);    } while(0)
+#define UDP6_INC_STATS_USER(field, is_udplite)			       do {    \
+	if (is_udplite) SNMP_INC_STATS_USER(udplite_stats_in6, field);         \
+	else		SNMP_INC_STATS_USER(udp_stats_in6, field);    } while(0)
+
+#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
+#define UDPX_INC_STATS_BH(sk, field) \
+	do { \
+		if ((sk)->sk_family == AF_INET) \
+			UDP_INC_STATS_BH(field, 0); \
+		else \
+			UDP6_INC_STATS_BH(field, 0); \
+	} while (0);
+#else
+#define UDPX_INC_STATS_BH(sk, field) UDP_INC_STATS_BH(field, 0)
+#endif
+
 /* /proc */
 struct udp_seq_afinfo {
 	struct module		*owner;