[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: NHerbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

include/net/ipv6.h

@@ -164,15 +164,6 @@ DECLARE_SNMP_STAT(struct icmpv6msg_mib, icmpv6msg_statistics);
 #define ICMP6MSGIN_INC_STATS_USER(idev, field) \
 	_DEVINC(icmpv6msg, _USER, idev, field)
 
-DECLARE_SNMP_STAT(struct udp_mib, udp_stats_in6);
-DECLARE_SNMP_STAT(struct udp_mib, udplite_stats_in6);
-#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)
-
 struct ip6_ra_chain
 {
 	struct ip6_ra_chain	*next;

include/net/udp.h

@@ -139,6 +139,12 @@ extern int 	udp_lib_setsockopt(struct sock *sk, int level, int optname,
 				   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 @@ DECLARE_SNMP_STAT(struct udp_mib, udp_statistics);
 	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;

include/net/udplite.h

@@ -13,9 +13,6 @@
 extern struct proto 		udplite_prot;
 extern struct hlist_head 	udplite_hash[UDP_HTABLE_SIZE];
 
-/* UDP-Lite does not have a standardized MIB yet, so we inherit from UDP */
-DECLARE_SNMP_STAT(struct udp_mib, udplite_statistics);
-
 /*
  *	Checksum computation is all in software, hence simpler getfrag.
  */

net/ipv4/udp.c

@@ -110,6 +110,7 @@
  */
 
 DEFINE_SNMP_STAT(struct udp_mib, udp_statistics) __read_mostly;
+EXPORT_SYMBOL(udp_statistics);
 
 struct hlist_head udp_hash[UDP_HTABLE_SIZE];
 DEFINE_RWLOCK(udp_hash_lock);
@@ -969,8 +970,11 @@ int udp_queue_rcv_skb(struct sock * sk, struct sk_buff *skb)
 			int ret;
 
 			ret = (*up->encap_rcv)(sk, skb);
-			if (ret <= 0)
+			if (ret <= 0) {
+				UDP_INC_STATS_BH(UDP_MIB_INDATAGRAMS,
+						 is_udplite);
 				return -ret;
+			}
 		}
 
 		/* FALLTHROUGH -- it's a UDP Packet */

net/ipv6/proc.c

@@ -27,6 +27,7 @@
 #include <net/ip.h>
 #include <net/sock.h>
 #include <net/tcp.h>
+#include <net/udp.h>
 #include <net/transp_v6.h>
 #include <net/ipv6.h>
 

net/ipv6/udp.c

@@ -34,6 +34,7 @@
 #include <linux/ipv6.h>
 #include <linux/icmpv6.h>
 #include <linux/init.h>
+#include <linux/module.h>
 #include <linux/skbuff.h>
 #include <asm/uaccess.h>
 
@@ -51,6 +52,7 @@
 #include "udp_impl.h"
 
 DEFINE_SNMP_STAT(struct udp_mib, udp_stats_in6) __read_mostly;
+EXPORT_SYMBOL(udp_stats_in6);
 
 static inline int udp_v6_get_port(struct sock *sk, unsigned short snum)
 {

net/rxrpc/ar-input.c

@@ -20,6 +20,7 @@
 #include <net/sock.h>
 #include <net/af_rxrpc.h>
 #include <net/ip.h>
+#include <net/udp.h>
 #include "ar-internal.h"
 
 unsigned long rxrpc_ack_timeout = 1;
@@ -707,10 +708,13 @@ void rxrpc_data_ready(struct sock *sk, int count)
 	if (skb_checksum_complete(skb)) {
 		rxrpc_free_skb(skb);
 		rxrpc_put_local(local);
+		UDP_INC_STATS_BH(UDP_MIB_INERRORS, 0);
 		_leave(" [CSUM failed]");
 		return;
 	}
 
+	UDP_INC_STATS_BH(UDP_MIB_INDATAGRAMS, 0);
+
 	/* the socket buffer we have is owned by UDP, with UDP's data all over
 	 * it, but we really want our own */
 	skb_orphan(skb);

net/sunrpc/xprtsock.c

@@ -838,8 +838,12 @@ static void xs_udp_data_ready(struct sock *sk, int len)
 		copied = repsize;
 
 	/* Suck it into the iovec, verify checksum if not done by hw. */
-	if (csum_partial_copy_to_xdr(&rovr->rq_private_buf, skb))
+	if (csum_partial_copy_to_xdr(&rovr->rq_private_buf, skb)) {
+		UDPX_INC_STATS_BH(sk, UDP_MIB_INERRORS);
 		goto out_unlock;
+	}
+
+	UDPX_INC_STATS_BH(sk, UDP_MIB_INDATAGRAMS);
 
 	/* Something worked... */
 	dst_confirm(skb->dst);