[IPV4] SNMP: Display new statistics at /proc/net/netstat

This displays the statistics specified in the updated IP-MIB RFC
(RFC4293) in /proc/net/netstat. The reason why these are not displayed
in /proc/net/snmp is that some existing utilities are developed under
the assumption which ipstat items in /proc/net/snmp is unchanged.

Signed-off-by: Mitsuru Chinen <mitch@linux.vnet.ibm.com>
Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 21 insertions, 0 deletions

diff --git a/net/ipv4/proc.c b/net/ipv4/proc.c
index 37ab5802ca08..cdbc6c135849 100644
--- a/net/ipv4/proc.c
+++ b/net/ipv4/proc.c
@@ -109,6 +109,17 @@ static const struct snmp_mib snmp4_ipstats_list[] = {
         SNMP_MIB_SENTINEL
 };
 
+/* Following RFC4293 items are displayed in /proc/net/netstat */
+static const struct snmp_mib snmp4_ipextstats_list[] = {
+        SNMP_MIB_ITEM("InNoRoutes", IPSTATS_MIB_INNOROUTES),
+        SNMP_MIB_ITEM("InTruncatedPkts", IPSTATS_MIB_INTRUNCATEDPKTS),
+        SNMP_MIB_ITEM("InMcastPkts", IPSTATS_MIB_INMCASTPKTS),
+        SNMP_MIB_ITEM("OutMcastPkts", IPSTATS_MIB_OUTMCASTPKTS),
+        SNMP_MIB_ITEM("InBcastPkts", IPSTATS_MIB_INBCASTPKTS),
+        SNMP_MIB_ITEM("OutBcastPkts", IPSTATS_MIB_OUTBCASTPKTS),
+        SNMP_MIB_SENTINEL
+};
+
 static const struct snmp_mib snmp4_icmp_list[] = {
         SNMP_MIB_ITEM("InMsgs", ICMP_MIB_INMSGS),
         SNMP_MIB_ITEM("InErrors", ICMP_MIB_INERRORS),
@@ -338,6 +349,16 @@ static int netstat_seq_show(struct seq_file *seq, void *v)
                            snmp_fold_field((void **)net_statistics,
                                            snmp4_net_list[i].entry));
 
+        seq_puts(seq, "\nIpExt:");
+        for (i = 0; snmp4_ipextstats_list[i].name != NULL; i++)
+                seq_printf(seq, " %s", snmp4_ipextstats_list[i].name);
+
+        seq_puts(seq, "\nIpExt:");
+        for (i = 0; snmp4_ipextstats_list[i].name != NULL; i++)
+                seq_printf(seq, " %lu",
+                           snmp_fold_field((void **)ip_statistics,
+                                           snmp4_ipextstats_list[i].entry));
+
         seq_putc(seq, '\n');
         return 0;
 }