mib: put ip statistics on struct net

Similar to tcp one.
Signed-off-by: Pavel Emelyanov <xemul@openvz.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

include/net/ip.h

@@ -156,10 +156,9 @@ struct ipv4_config
 };
 
 extern struct ipv4_config ipv4_config;
-DECLARE_SNMP_STAT(struct ipstats_mib, ip_statistics);
-#define IP_INC_STATS(net, field)	do { (void)net; SNMP_INC_STATS(ip_statistics, field); } while (0)
-#define IP_INC_STATS_BH(net, field)	do { (void)net; SNMP_INC_STATS_BH(ip_statistics, field); } while (0)
-#define IP_ADD_STATS_BH(net, field, val) SNMP_ADD_STATS_BH(ip_statistics, field, val)
+#define IP_INC_STATS(net, field)	SNMP_INC_STATS((net)->mib.ip_statistics, field)
+#define IP_INC_STATS_BH(net, field)	SNMP_INC_STATS_BH((net)->mib.ip_statistics, field)
+#define IP_ADD_STATS_BH(net, field, val) SNMP_ADD_STATS_BH((net)->mib.ip_statistics, field, val)
 DECLARE_SNMP_STAT(struct linux_mib, net_statistics);
 #define NET_INC_STATS(net, field)	do { (void)net; SNMP_INC_STATS(net_statistics, field); } while (0)
 #define NET_INC_STATS_BH(net, field)	do { (void)net; SNMP_INC_STATS_BH(net_statistics, field); } while (0)

include/net/netns/mib.h

@@ -5,6 +5,7 @@
 
 struct netns_mib {
 	DEFINE_SNMP_STAT(struct tcp_mib, tcp_statistics);
+	DEFINE_SNMP_STAT(struct ipstats_mib, ip_statistics);
 };
 
 #endif

net/ipv4/af_inet.c

@@ -1345,16 +1345,22 @@ static __net_init int ipv4_mib_init_net(struct net *net)
 	if (snmp_mib_init((void **)net->mib.tcp_statistics,
 			  sizeof(struct tcp_mib)) < 0)
 		goto err_tcp_mib;
+	if (snmp_mib_init((void **)net->mib.ip_statistics,
+			  sizeof(struct ipstats_mib)) < 0)
+		goto err_ip_mib;
 
 	tcp_mib_init(net);
 	return 0;
 
+err_ip_mib:
+	snmp_mib_free((void **)net->mib.tcp_statistics);
 err_tcp_mib:
 	return -ENOMEM;
 }
 
 static __net_exit void ipv4_mib_exit_net(struct net *net)
 {
+	snmp_mib_free((void **)net->mib.ip_statistics);
 	snmp_mib_free((void **)net->mib.tcp_statistics);
 }
 
@@ -1368,9 +1374,6 @@ static int __init init_ipv4_mibs(void)
 	if (snmp_mib_init((void **)net_statistics,
 			  sizeof(struct linux_mib)) < 0)
 		goto err_net_mib;
-	if (snmp_mib_init((void **)ip_statistics,
-			  sizeof(struct ipstats_mib)) < 0)
-		goto err_ip_mib;
 	if (snmp_mib_init((void **)icmp_statistics,
 			  sizeof(struct icmp_mib)) < 0)
 		goto err_icmp_mib;
@@ -1398,8 +1401,6 @@ err_udp_mib:
 err_icmpmsg_mib:
 	snmp_mib_free((void **)icmp_statistics);
 err_icmp_mib:
-	snmp_mib_free((void **)ip_statistics);
-err_ip_mib:
 	snmp_mib_free((void **)net_statistics);
 err_net_mib:
 	return -ENOMEM;

net/ipv4/ip_input.c

@@ -144,12 +144,6 @@
 #include <linux/mroute.h>
 #include <linux/netlink.h>
 
-/*
- *	SNMP management statistics
- */
-
-DEFINE_SNMP_STAT(struct ipstats_mib, ip_statistics) __read_mostly;
-
 /*
  *	Process Router Attention IP option
  */
@@ -447,5 +441,3 @@ drop:
 out:
 	return NET_RX_DROP;
 }
-
-EXPORT_SYMBOL(ip_statistics);

net/ipv4/proc.c

@@ -344,7 +344,7 @@ static int snmp_seq_show(struct seq_file *seq, void *v)
 
 	for (i = 0; snmp4_ipstats_list[i].name != NULL; i++)
 		seq_printf(seq, " %lu",
-			   snmp_fold_field((void **)ip_statistics,
+			   snmp_fold_field((void **)init_net.mib.ip_statistics,
 					   snmp4_ipstats_list[i].entry));
 
 	icmp_put(seq);	/* RFC 2011 compatibility */
@@ -431,7 +431,7 @@ static int netstat_seq_show(struct seq_file *seq, void *v)
 	seq_puts(seq, "\nIpExt:");
 	for (i = 0; snmp4_ipextstats_list[i].name != NULL; i++)
 		seq_printf(seq, " %lu",
-			   snmp_fold_field((void **)ip_statistics,
+			   snmp_fold_field((void **)init_net.mib.ip_statistics,
 					   snmp4_ipextstats_list[i].entry));
 
 	seq_putc(seq, '\n');