[IPV6]: Per-interface statistics support.

For IP MIB (RFC4293).

Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>

1 files changed, 18 insertions, 3 deletions

diff --git a/include/net/ipv6.h b/include/net/ipv6.h
index 0b8c9b990ac4..3c266ad99a02 100644
--- a/include/net/ipv6.h
+++ b/include/net/ipv6.h
@@ -113,9 +113,24 @@ extern int sysctl_mld_max_msf;
 
 /* MIBs */
 DECLARE_SNMP_STAT(struct ipstats_mib, ipv6_statistics);
-#define IP6_INC_STATS(field)            SNMP_INC_STATS(ipv6_statistics, field)
-#define IP6_INC_STATS_BH(field)         SNMP_INC_STATS_BH(ipv6_statistics, field)
-#define IP6_INC_STATS_USER(field)       SNMP_INC_STATS_USER(ipv6_statistics, field)
+#define IP6_INC_STATS(idev,field)               ({                      \
+        struct inet6_dev *_idev = (idev);                               \
+        if (likely(_idev != NULL))                                      \
+                SNMP_INC_STATS(_idev->stats.ipv6, field);               \
+        SNMP_INC_STATS(ipv6_statistics, field);                         \
+})
+#define IP6_INC_STATS_BH(idev,field)            ({                      \
+        struct inet6_dev *_idev = (idev);                               \
+        if (likely(_idev != NULL))                                      \
+                SNMP_INC_STATS_BH(_idev->stats.ipv6, field);            \
+        SNMP_INC_STATS_BH(ipv6_statistics, field);                      \
+})
+#define IP6_INC_STATS_USER(idev,field)          ({                      \
+        struct inet6_dev *_idev = (idev);                               \
+        if (likely(_idev != NULL))                                      \
+                SNMP_INC_STATS_USER(_idev->stats.ipv6, field);          \
+        SNMP_INC_STATS_USER(ipv6_statistics, field);                    \
+})
 DECLARE_SNMP_STAT(struct icmpv6_mib, icmpv6_statistics);
 #define ICMP6_INC_STATS(idev, field)            ({                      \
         struct inet6_dev *_idev = (idev);                               \