mib: put udp statistics on struct net

Similar to... ouch, I repeat myself.
Signed-off-by: Pavel Emelyanov <xemul@openvz.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

include/net/netns/mib.h

@@ -7,6 +7,7 @@ struct netns_mib {
 	DEFINE_SNMP_STAT(struct tcp_mib, tcp_statistics);
 	DEFINE_SNMP_STAT(struct ipstats_mib, ip_statistics);
 	DEFINE_SNMP_STAT(struct linux_mib, net_statistics);
+	DEFINE_SNMP_STAT(struct udp_mib, udp_statistics);
 };
 
 #endif

include/net/udp.h

@@ -148,7 +148,6 @@ extern int 	udp_lib_setsockopt(struct sock *sk, int level, int optname,
 				   char __user *optval, int optlen,
 				   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 */
@@ -158,12 +157,12 @@ DECLARE_SNMP_STAT(struct udp_mib, udplite_stats_in6);
 /*
  * 	SNMP statistics for UDP and UDP-Lite
  */
-#define UDP_INC_STATS_USER(net, field, is_udplite)	      do { (void)net; \
+#define UDP_INC_STATS_USER(net, field, is_udplite)	      do { \
 	if (is_udplite) SNMP_INC_STATS_USER(udplite_statistics, field);       \
-	else		SNMP_INC_STATS_USER(udp_statistics, field);  }  while(0)
-#define UDP_INC_STATS_BH(net, field, is_udplite) 	      do { (void)net; \
+	else		SNMP_INC_STATS_USER((net)->mib.udp_statistics, field);  }  while(0)
+#define UDP_INC_STATS_BH(net, field, is_udplite) 	      do { \
 	if (is_udplite) SNMP_INC_STATS_BH(udplite_statistics, field);         \
-	else		SNMP_INC_STATS_BH(udp_statistics, field);    }  while(0)
+	else		SNMP_INC_STATS_BH((net)->mib.udp_statistics, field);    }  while(0)
 
 #define UDP6_INC_STATS_BH(net, field, is_udplite) 	    do { (void)net;  \
 	if (is_udplite) SNMP_INC_STATS_BH(udplite_stats_in6, field);         \

net/ipv4/af_inet.c

@@ -1349,10 +1349,15 @@ static __net_init int ipv4_mib_init_net(struct net *net)
 	if (snmp_mib_init((void **)net->mib.net_statistics,
 			  sizeof(struct linux_mib)) < 0)
 		goto err_net_mib;
+	if (snmp_mib_init((void **)net->mib.udp_statistics,
+			  sizeof(struct udp_mib)) < 0)
+		goto err_udp_mib;
 
 	tcp_mib_init(net);
 	return 0;
 
+err_udp_mib:
+	snmp_mib_free((void **)net->mib.net_statistics);
 err_net_mib:
 	snmp_mib_free((void **)net->mib.ip_statistics);
 err_ip_mib:
@@ -1363,6 +1368,7 @@ static __net_init int ipv4_mib_init_net(struct net *net)
 
 static __net_exit void ipv4_mib_exit_net(struct net *net)
 {
+	snmp_mib_free((void **)net->mib.udp_statistics);
 	snmp_mib_free((void **)net->mib.net_statistics);
 	snmp_mib_free((void **)net->mib.ip_statistics);
 	snmp_mib_free((void **)net->mib.tcp_statistics);
@@ -1381,9 +1387,6 @@ static int __init init_ipv4_mibs(void)
 	if (snmp_mib_init((void **)icmpmsg_statistics,
 			  sizeof(struct icmpmsg_mib)) < 0)
 		goto err_icmpmsg_mib;
-	if (snmp_mib_init((void **)udp_statistics,
-			  sizeof(struct udp_mib)) < 0)
-		goto err_udp_mib;
 	if (snmp_mib_init((void **)udplite_statistics,
 			  sizeof(struct udp_mib)) < 0)
 		goto err_udplite_mib;
@@ -1396,8 +1399,6 @@ static int __init init_ipv4_mibs(void)
 err_net:
 	snmp_mib_free((void **)udplite_statistics);
 err_udplite_mib:
-	snmp_mib_free((void **)udp_statistics);
-err_udp_mib:
 	snmp_mib_free((void **)icmpmsg_statistics);
 err_icmpmsg_mib:
 	snmp_mib_free((void **)icmp_statistics);

net/ipv4/proc.c

@@ -374,7 +374,7 @@ static int snmp_seq_show(struct seq_file *seq, void *v)
 	seq_puts(seq, "\nUdp:");
 	for (i = 0; snmp4_udp_list[i].name != NULL; i++)
 		seq_printf(seq, " %lu",
-			   snmp_fold_field((void **)udp_statistics,
+			   snmp_fold_field((void **)init_net.mib.udp_statistics,
 					   snmp4_udp_list[i].entry));
 
 	/* the UDP and UDP-Lite MIBs are the same */

net/ipv4/udp.c

@@ -108,9 +108,6 @@
  *	Snmp MIB for the UDP layer
  */
 
-DEFINE_SNMP_STAT(struct udp_mib, udp_statistics) __read_mostly;
-EXPORT_SYMBOL(udp_statistics);
-
 DEFINE_SNMP_STAT(struct udp_mib, udp_stats_in6) __read_mostly;
 EXPORT_SYMBOL(udp_stats_in6);