ipv4: add mc_count to in_device.

This patch add mc_count to struct in_device and updates
increment/decrement/initilaize of this field in IPv4 and in IPv6.

- Also printing the vfs /proc entry (/proc/net/igmp) is adjusted to
use the new mc_count.

Signed-off-by: Rami Rosen <ramirose@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 1 insertions, 0 deletions

diff --git a/include/linux/inetdevice.h b/include/linux/inetdevice.h
index c6f51ad52d5b..06fcdb45106b 100644
--- a/include/linux/inetdevice.h
+++ b/include/linux/inetdevice.h
@@ -25,6 +25,7 @@ struct in_device
         struct in_ifaddr        *ifa_list;      /* IP ifaddr chain              */
         rwlock_t                mc_list_lock;
         struct ip_mc_list       *mc_list;       /* IP multicast filter chain    */
+        int                     mc_count;                 /* Number of installed mcasts */
         spinlock_t              mc_tomb_lock;
         struct ip_mc_list       *mc_tomb;
         unsigned long           mr_v1_seen;