SUNRPC: Replace connect dprintk call sites with a tracepoint

This trace event can be used to audit transport connections from the
client.
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>

include/trace/events/sunrpc.h

@@ -983,6 +983,7 @@ DECLARE_EVENT_CLASS(rpc_xprt_lifetime_class,
 			TP_ARGS(xprt))
 
 DEFINE_RPC_XPRT_LIFETIME_EVENT(create);
+DEFINE_RPC_XPRT_LIFETIME_EVENT(connect);
 DEFINE_RPC_XPRT_LIFETIME_EVENT(disconnect_auto);
 DEFINE_RPC_XPRT_LIFETIME_EVENT(disconnect_done);
 DEFINE_RPC_XPRT_LIFETIME_EVENT(disconnect_force);

net/sunrpc/clnt.c

@@ -2055,10 +2055,6 @@ call_connect(struct rpc_task *task)
 		return;
 	}
 
-	dprintk("RPC: %5u call_connect xprt %p %s connected\n",
-			task->tk_pid, xprt,
-			(xprt_connected(xprt) ? "is" : "is not"));
-
 	task->tk_action = call_connect_status;
 	if (task->tk_status < 0)
 		return;

net/sunrpc/xprt.c

@@ -834,8 +834,7 @@ void xprt_connect(struct rpc_task *task)
 {
 	struct rpc_xprt	*xprt = task->tk_rqstp->rq_xprt;
 
-	dprintk("RPC: %5u xprt_connect xprt %p %s connected\n", task->tk_pid,
-			xprt, (xprt_connected(xprt) ? "is" : "is not"));
+	trace_xprt_connect(xprt);
 
 	if (!xprt_bound(xprt)) {
 		task->tk_status = -EAGAIN;