ipmr/ip6mr: advertise mfc stats via rtnetlink

These statistics can be checked only via /proc/net/ip_mr_cache or
SIOCGETSGCNT[_IN6] and thus only for the table RT_TABLE_DEFAULT.
Advertising them via rtnetlink allows to get statistics for all cache entries,
whatever the table is.

Signed-off-by: Nicolas Dichtel <nicolas.dichtel@6wind.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 7 insertions, 0 deletions

diff --git a/include/uapi/linux/rtnetlink.h b/include/uapi/linux/rtnetlink.h
index 3dee071770d..80abe27dc2a 100644
--- a/include/uapi/linux/rtnetlink.h
+++ b/include/uapi/linux/rtnetlink.h
@@ -288,6 +288,7 @@ enum rtattr_type_t {
         RTA_MP_ALGO, /* no longer used */
         RTA_TABLE,
         RTA_MARK,
+        RTA_MFC_STATS,
         __RTA_MAX
 };
 
@@ -408,6 +409,12 @@ struct rta_session {
         } u;
 };
 
+struct rta_mfc_stats {
+        __u64   mfcs_packets;
+        __u64   mfcs_bytes;
+        __u64   mfcs_wrong_if;
+};
+
 /****
  *              General form of address family dependent message.
  ****/