tipc: make cluster size threshold for monitoring configurable

In this commit, we introduce support to configure the minimum
threshold to activate the new link monitoring algorithm.

Reviewed-by: Jon Maloy <jon.maloy@ericsson.com>
Signed-off-by: Parthasarathy Bhuvaragan <parthasarathy.bhuvaragan@ericsson.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/tipc/netlink.c b/net/tipc/netlink.c
index 56935df2..1e43ac0 100644
--- a/net/tipc/netlink.c
+++ b/net/tipc/netlink.c
@@ -52,7 +52,8 @@
 	[TIPC_NLA_MEDIA]	= { .type = NLA_NESTED, },
 	[TIPC_NLA_NODE]		= { .type = NLA_NESTED, },
 	[TIPC_NLA_NET]		= { .type = NLA_NESTED, },
-	[TIPC_NLA_NAME_TABLE]	= { .type = NLA_NESTED, }
+	[TIPC_NLA_NAME_TABLE]	= { .type = NLA_NESTED, },
+	[TIPC_NLA_MON]		= { .type = NLA_NESTED, },
 };
 
 const struct nla_policy
@@ -61,6 +62,11 @@
 	[TIPC_NLA_NAME_TABLE_PUBL]	= { .type = NLA_NESTED }
 };
 
+const struct nla_policy tipc_nl_monitor_policy[TIPC_NLA_MON_MAX + 1] = {
+	[TIPC_NLA_MON_UNSPEC]			= { .type = NLA_UNSPEC },
+	[TIPC_NLA_MON_ACTIVATION_THRESHOLD]	= { .type = NLA_U32 },
+};
+
 const struct nla_policy tipc_nl_sock_policy[TIPC_NLA_SOCK_MAX + 1] = {
 	[TIPC_NLA_SOCK_UNSPEC]		= { .type = NLA_UNSPEC },
 	[TIPC_NLA_SOCK_ADDR]		= { .type = NLA_U32 },
@@ -214,7 +220,12 @@
 		.cmd	= TIPC_NL_NAME_TABLE_GET,
 		.dumpit	= tipc_nl_name_table_dump,
 		.policy = tipc_nl_policy,
-	}
+	},
+	{
+		.cmd	= TIPC_NL_MON_SET,
+		.doit	= tipc_nl_node_set_monitor,
+		.policy = tipc_nl_policy,
+	},
 };
 
 int tipc_nlmsg_parse(const struct nlmsghdr *nlh, struct nlattr ***attr)