rpcrdma: Introduce a simple cid tracepoint class

De-duplicate some code, making it easier to add new tracepoints that
report only a completion ID.
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>

include/trace/events/rpcrdma.h

@@ -22,47 +22,37 @@
  ** Event classes
  **/
 
-DECLARE_EVENT_CLASS(rpcrdma_completion_class,
+DECLARE_EVENT_CLASS(rpcrdma_simple_cid_class,
 	TP_PROTO(
-		const struct ib_wc *wc,
 		const struct rpc_rdma_cid *cid
 	),
 
-	TP_ARGS(wc, cid),
+	TP_ARGS(cid),
 
 	TP_STRUCT__entry(
 		__field(u32, cq_id)
 		__field(int, completion_id)
-		__field(unsigned long, status)
-		__field(unsigned int, vendor_err)
 	),
 
 	TP_fast_assign(
 		__entry->cq_id = cid->ci_queue_id;
 		__entry->completion_id = cid->ci_completion_id;
-		__entry->status = wc->status;
-		if (wc->status)
-			__entry->vendor_err = wc->vendor_err;
-		else
-			__entry->vendor_err = 0;
 	),
 
-	TP_printk("cq.id=%u cid=%d status=%s (%lu/0x%x)",
-		__entry->cq_id, __entry->completion_id,
-		rdma_show_wc_status(__entry->status),
-		__entry->status, __entry->vendor_err
+	TP_printk("cq.id=%d cid=%d",
+		__entry->cq_id, __entry->completion_id
 	)
 );
 
-#define DEFINE_COMPLETION_EVENT(name)					\
-		DEFINE_EVENT(rpcrdma_completion_class, name,		\
+#define DEFINE_SIMPLE_CID_EVENT(name)					\
+		DEFINE_EVENT(rpcrdma_simple_cid_class, name,		\
 				TP_PROTO(				\
-					const struct ib_wc *wc,		\
 					const struct rpc_rdma_cid *cid	\
 				),					\
-				TP_ARGS(wc, cid))
+				TP_ARGS(cid)				\
+		)
 
-DECLARE_EVENT_CLASS(rpcrdma_send_completion_class,
+DECLARE_EVENT_CLASS(rpcrdma_completion_class,
 	TP_PROTO(
 		const struct ib_wc *wc,
 		const struct rpc_rdma_cid *cid
@@ -73,20 +63,29 @@ DECLARE_EVENT_CLASS(rpcrdma_send_completion_class,
 	TP_STRUCT__entry(
 		__field(u32, cq_id)
 		__field(int, completion_id)
+		__field(unsigned long, status)
+		__field(unsigned int, vendor_err)
 	),
 
 	TP_fast_assign(
 		__entry->cq_id = cid->ci_queue_id;
 		__entry->completion_id = cid->ci_completion_id;
+		__entry->status = wc->status;
+		if (wc->status)
+			__entry->vendor_err = wc->vendor_err;
+		else
+			__entry->vendor_err = 0;
 	),
 
-	TP_printk("cq.id=%u cid=%d",
-		__entry->cq_id, __entry->completion_id
+	TP_printk("cq.id=%u cid=%d status=%s (%lu/0x%x)",
+		__entry->cq_id, __entry->completion_id,
+		rdma_show_wc_status(__entry->status),
+		__entry->status, __entry->vendor_err
 	)
 );
 
-#define DEFINE_SEND_COMPLETION_EVENT(name)				\
-		DEFINE_EVENT(rpcrdma_send_completion_class, name,	\
+#define DEFINE_COMPLETION_EVENT(name)					\
+		DEFINE_EVENT(rpcrdma_completion_class, name,		\
 				TP_PROTO(				\
 					const struct ib_wc *wc,		\
 					const struct rpc_rdma_cid *cid	\
@@ -978,27 +977,7 @@ TRACE_EVENT(xprtrdma_post_send_err,
 	)
 );
 
-TRACE_EVENT(xprtrdma_post_recv,
-	TP_PROTO(
-		const struct rpcrdma_rep *rep
-	),
-
-	TP_ARGS(rep),
-
-	TP_STRUCT__entry(
-		__field(u32, cq_id)
-		__field(int, completion_id)
-	),
-
-	TP_fast_assign(
-		__entry->cq_id = rep->rr_cid.ci_queue_id;
-		__entry->completion_id = rep->rr_cid.ci_completion_id;
-	),
-
-	TP_printk("cq.id=%d cid=%d",
-		__entry->cq_id, __entry->completion_id
-	)
-);
+DEFINE_SIMPLE_CID_EVENT(xprtrdma_post_recv);
 
 TRACE_EVENT(xprtrdma_post_recvs,
 	TP_PROTO(
@@ -2020,31 +1999,11 @@ TRACE_EVENT(svcrdma_post_send,
 	)
 );
 
-DEFINE_SEND_COMPLETION_EVENT(svcrdma_wc_send);
+DEFINE_SIMPLE_CID_EVENT(svcrdma_wc_send);
 DEFINE_SEND_FLUSH_EVENT(svcrdma_wc_send_flush);
 DEFINE_SEND_FLUSH_EVENT(svcrdma_wc_send_err);
 
-TRACE_EVENT(svcrdma_post_recv,
-	TP_PROTO(
-		const struct svc_rdma_recv_ctxt *ctxt
-	),
-
-	TP_ARGS(ctxt),
-
-	TP_STRUCT__entry(
-		__field(u32, cq_id)
-		__field(int, completion_id)
-	),
-
-	TP_fast_assign(
-		__entry->cq_id = ctxt->rc_cid.ci_queue_id;
-		__entry->completion_id = ctxt->rc_cid.ci_completion_id;
-	),
-
-	TP_printk("cq.id=%d cid=%d",
-		__entry->cq_id, __entry->completion_id
-	)
-);
+DEFINE_SIMPLE_CID_EVENT(svcrdma_post_recv);
 
 DEFINE_RECEIVE_SUCCESS_EVENT(svcrdma_wc_recv);
 DEFINE_RECEIVE_FLUSH_EVENT(svcrdma_wc_recv_flush);
@@ -2153,7 +2112,7 @@ TRACE_EVENT(svcrdma_wc_read,
 DEFINE_SEND_FLUSH_EVENT(svcrdma_wc_read_flush);
 DEFINE_SEND_FLUSH_EVENT(svcrdma_wc_read_err);
 
-DEFINE_SEND_COMPLETION_EVENT(svcrdma_wc_write);
+DEFINE_SIMPLE_CID_EVENT(svcrdma_wc_write);
 DEFINE_SEND_FLUSH_EVENT(svcrdma_wc_write_flush);
 DEFINE_SEND_FLUSH_EVENT(svcrdma_wc_write_err);
 

net/sunrpc/xprtrdma/svc_rdma_recvfrom.c

@@ -264,7 +264,7 @@ static bool svc_rdma_refresh_recvs(struct svcxprt_rdma *rdma,
 		if (!ctxt)
 			break;
 
-		trace_svcrdma_post_recv(ctxt);
+		trace_svcrdma_post_recv(&ctxt->rc_cid);
 		ctxt->rc_recv_wr.next = recv_chain;
 		recv_chain = &ctxt->rc_recv_wr;
 		rdma->sc_pending_recvs++;

net/sunrpc/xprtrdma/svc_rdma_rw.c

@@ -282,7 +282,7 @@ static void svc_rdma_write_done(struct ib_cq *cq, struct ib_wc *wc)
 
 	switch (wc->status) {
 	case IB_WC_SUCCESS:
-		trace_svcrdma_wc_write(wc, &cc->cc_cid);
+		trace_svcrdma_wc_write(&cc->cc_cid);
 		break;
 	case IB_WC_WR_FLUSH_ERR:
 		trace_svcrdma_wc_write_flush(wc, &cc->cc_cid);

net/sunrpc/xprtrdma/svc_rdma_sendto.c

@@ -305,7 +305,7 @@ static void svc_rdma_wc_send(struct ib_cq *cq, struct ib_wc *wc)
 	if (unlikely(wc->status != IB_WC_SUCCESS))
 		goto flushed;
 
-	trace_svcrdma_wc_send(wc, &ctxt->sc_cid);
+	trace_svcrdma_wc_send(&ctxt->sc_cid);
 	svc_rdma_send_ctxt_put(rdma, ctxt);
 	return;
 

net/sunrpc/xprtrdma/verbs.c

@@ -1364,7 +1364,7 @@ void rpcrdma_post_recvs(struct rpcrdma_xprt *r_xprt, int needed, bool temp)
 		}
 
 		rep->rr_cid.ci_queue_id = ep->re_attr.recv_cq->res.id;
-		trace_xprtrdma_post_recv(rep);
+		trace_xprtrdma_post_recv(&rep->rr_cid);
 		rep->rr_recv_wr.next = wr;
 		wr = &rep->rr_recv_wr;
 		--needed;