snmp: add missing counters for RFC 4293

The IP MIB (RFC 4293) defines stats for InOctets, OutOctets, InMcastOctets and
OutMcastOctets:
http://tools.ietf.org/html/rfc4293
But it seems we don't track those in any way that easy to separate from other
protocols.  This patch adds those missing counters to the stats file. Tested
successfully by me

With help from Eric Dumazet.

Signed-off-by: Neil Horman <nhorman@tuxdriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 14 insertions, 1 deletions

diff --git a/include/net/ipv6.h b/include/net/ipv6.h
index c1f16fc49ade..f27fd83d67d8 100644
--- a/include/net/ipv6.h
+++ b/include/net/ipv6.h
@@ -126,15 +126,28 @@ extern struct ctl_path net_ipv6_ctl_path[];
         SNMP_ADD_STATS##modifier((net)->mib.statname##_statistics, (field), (val));\
 })
 
+#define _DEVUPD(net, statname, modifier, idev, field, val)              \
+({                                                                      \
+        struct inet6_dev *_idev = (idev);                               \
+        if (likely(_idev != NULL))                                      \
+                SNMP_UPD_PO_STATS##modifier((_idev)->stats.statname, field, (val)); \
+        SNMP_UPD_PO_STATS##modifier((net)->mib.statname##_statistics, field, (val));\
+})
+
 /* MIBs */
 
 #define IP6_INC_STATS(net, idev,field)          \
                 _DEVINC(net, ipv6, , idev, field)
 #define IP6_INC_STATS_BH(net, idev,field)       \
                 _DEVINC(net, ipv6, _BH, idev, field)
+#define IP6_ADD_STATS(net, idev,field,val)      \
+                _DEVADD(net, ipv6, , idev, field, val)
 #define IP6_ADD_STATS_BH(net, idev,field,val)   \
                 _DEVADD(net, ipv6, _BH, idev, field, val)
-
+#define IP6_UPD_PO_STATS(net, idev,field,val)   \
+                _DEVUPD(net, ipv6, , idev, field, val)
+#define IP6_UPD_PO_STATS_BH(net, idev,field,val)   \
+                _DEVUPD(net, ipv6, _BH, idev, field, val)
 #define ICMP6_INC_STATS(net, idev, field)       \
                 _DEVINC(net, icmpv6, , idev, field)
 #define ICMP6_INC_STATS_BH(net, idev, field)    \