tipc: add ability to order and receive topology events in driver

As preparation for introducing communication groups, we add the ability
to issue topology subscriptions and receive topology events from kernel
space. This will make it possible for group member sockets to keep track
of other group members.

Signed-off-by: Jon Maloy <jon.maloy@ericsson.com>
Acked-by: Ying Xue <ying.xue@windriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 5 insertions, 0 deletions

diff --git a/net/tipc/core.h b/net/tipc/core.h
index 5cc5398be722..964342689f2c 100644
--- a/net/tipc/core.h
+++ b/net/tipc/core.h
@@ -132,6 +132,11 @@ static inline struct list_head *tipc_nodes(struct net *net)
         return &tipc_net(net)->node_list;
 }
 
+static inline struct tipc_server *tipc_topsrv(struct net *net)
+{
+        return tipc_net(net)->topsrv;
+}
+
 static inline unsigned int tipc_hashfn(u32 addr)
 {
         return addr & (NODE_HTABLE_SIZE - 1);