mib: put tcp statistics on struct net
Pavel Emelyanov [Fri, 18 Jul 2008 11:02:08 +0000 (04:02 -0700)]
Proc temporary uses stats from init_net.

BTW, TCP_XXX_STATS are beautiful (w/o do { } while (0) facing) again :)

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

include/net/netns/mib.h
include/net/tcp.h
net/ipv4/af_inet.c
net/ipv4/proc.c
net/ipv4/tcp.c

index 9f4b31e..8f96079 100644 (file)
@@ -4,6 +4,7 @@
 #include <net/snmp.h>
 
 struct netns_mib {
+       DEFINE_SNMP_STAT(struct tcp_mib, tcp_statistics);
 };
 
 #endif
index 60e5be8..92d7b55 100644 (file)
@@ -265,11 +265,10 @@ static inline int tcp_too_many_orphans(struct sock *sk, int num)
 
 extern struct proto tcp_prot;
 
-DECLARE_SNMP_STAT(struct tcp_mib, tcp_statistics);
-#define TCP_INC_STATS(net, field)      do { (void)net; SNMP_INC_STATS(tcp_statistics, field); } while (0)
-#define TCP_INC_STATS_BH(net, field)   do { (void)net; SNMP_INC_STATS_BH(tcp_statistics, field); } while (0)
-#define TCP_DEC_STATS(net, field)      do { (void)net; SNMP_DEC_STATS(tcp_statistics, field); } while (0)
-#define TCP_ADD_STATS_USER(net, field, val) do { (void)net; SNMP_ADD_STATS_USER(tcp_statistics, field, val); } while (0)
+#define TCP_INC_STATS(net, field)      SNMP_INC_STATS((net)->mib.tcp_statistics, field)
+#define TCP_INC_STATS_BH(net, field)   SNMP_INC_STATS_BH((net)->mib.tcp_statistics, field)
+#define TCP_DEC_STATS(net, field)      SNMP_DEC_STATS((net)->mib.tcp_statistics, field)
+#define TCP_ADD_STATS_USER(net, field, val) SNMP_ADD_STATS_USER((net)->mib.tcp_statistics, field, val)
 
 extern void                    tcp_v4_err(struct sk_buff *skb, u32);
 
index b4b77aa..c1a3e98 100644 (file)
@@ -1342,11 +1342,20 @@ static struct net_protocol icmp_protocol = {
 
 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;
+
+       tcp_mib_init(net);
        return 0;
+
+err_tcp_mib:
+       return -ENOMEM;
 }
 
 static __net_exit void ipv4_mib_exit_net(struct net *net)
 {
+       snmp_mib_free((void **)net->mib.tcp_statistics);
 }
 
 static __net_initdata struct pernet_operations ipv4_mib_ops = {
@@ -1368,9 +1377,6 @@ 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 **)tcp_statistics,
-                         sizeof(struct tcp_mib)) < 0)
-               goto err_tcp_mib;
        if (snmp_mib_init((void **)udp_statistics,
                          sizeof(struct udp_mib)) < 0)
                goto err_udp_mib;
@@ -1378,8 +1384,6 @@ static int __init init_ipv4_mibs(void)
                          sizeof(struct udp_mib)) < 0)
                goto err_udplite_mib;
 
-       tcp_mib_init(&init_net);
-
        if (register_pernet_subsys(&ipv4_mib_ops))
                goto err_net;
 
@@ -1390,8 +1394,6 @@ err_net:
 err_udplite_mib:
        snmp_mib_free((void **)udp_statistics);
 err_udp_mib:
-       snmp_mib_free((void **)tcp_statistics);
-err_tcp_mib:
        snmp_mib_free((void **)icmpmsg_statistics);
 err_icmpmsg_mib:
        snmp_mib_free((void **)icmp_statistics);
index eb5cee2..19e1d8e 100644 (file)
@@ -359,11 +359,11 @@ static int snmp_seq_show(struct seq_file *seq, void *v)
                /* MaxConn field is signed, RFC 2012 */
                if (snmp4_tcp_list[i].entry == TCP_MIB_MAXCONN)
                        seq_printf(seq, " %ld",
-                                  snmp_fold_field((void **)tcp_statistics,
+                                  snmp_fold_field((void **)init_net.mib.tcp_statistics,
                                                   snmp4_tcp_list[i].entry));
                else
                        seq_printf(seq, " %lu",
-                                  snmp_fold_field((void **)tcp_statistics,
+                                  snmp_fold_field((void **)init_net.mib.tcp_statistics,
                                                   snmp4_tcp_list[i].entry));
        }
 
index eec8cf7..827e613 100644 (file)
 
 int sysctl_tcp_fin_timeout __read_mostly = TCP_FIN_TIMEOUT;
 
-DEFINE_SNMP_STAT(struct tcp_mib, tcp_statistics) __read_mostly;
-
 atomic_t tcp_orphan_count = ATOMIC_INIT(0);
 
 EXPORT_SYMBOL_GPL(tcp_orphan_count);
@@ -2802,4 +2800,3 @@ EXPORT_SYMBOL(tcp_splice_read);
 EXPORT_SYMBOL(tcp_sendpage);
 EXPORT_SYMBOL(tcp_setsockopt);
 EXPORT_SYMBOL(tcp_shutdown);
-EXPORT_SYMBOL(tcp_statistics);