SUNRPC: Trace server-side rpcbind registration events

Signed-off-by: Chuck Lever <[e-mail]>

include/trace/events/sunrpc.h

···
 DEFINE_CACHE_EVENT(cache_entry_make_negative);
 DEFINE_CACHE_EVENT(cache_entry_no_listener);
 
+DECLARE_EVENT_CLASS(register_class,
+	TP_PROTO(
+		const char *program,
+		const u32 version,
+		const int family,
+		const unsigned short protocol,
+		const unsigned short port,
+		int error
+	),
+
+	TP_ARGS(program, version, family, protocol, port, error),
+
+	TP_STRUCT__entry(
+		__field(u32, version)
+		__field(unsigned long, family)
+		__field(unsigned short, protocol)
+		__field(unsigned short, port)
+		__field(int, error)
+		__string(program, program)
+	),
+
+	TP_fast_assign(
+		__entry->version = version;
+		__entry->family = family;
+		__entry->protocol = protocol;
+		__entry->port = port;
+		__entry->error = error;
+		__assign_str(program, program);
+	),
+
+	TP_printk("program=%sv%u proto=%s port=%u family=%s error=%d",
+		__get_str(program), __entry->version,
+		__entry->protocol == IPPROTO_UDP ? "udp" : "tcp",
+		__entry->port, rpc_show_address_family(__entry->family),
+		__entry->error
+	)
+);
+
+#define DEFINE_REGISTER_EVENT(name) \
+	DEFINE_EVENT(register_class, svc_##name, \
+			TP_PROTO( \
+				const char *program, \
+				const u32 version, \
+				const int family, \
+				const unsigned short protocol, \
+				const unsigned short port, \
+				int error \
+			), \
+			TP_ARGS(program, version, family, protocol, \
+				port, error))
+
+DEFINE_REGISTER_EVENT(register);
+DEFINE_REGISTER_EVENT(noregister);
+
+TRACE_EVENT(svc_unregister,
+	TP_PROTO(
+		const char *program,
+		const u32 version,
+		int error
+	),
+
+	TP_ARGS(program, version, error),
+
+	TP_STRUCT__entry(
+		__field(u32, version)
+		__field(int, error)
+		__string(program, program)
+	),
+
+	TP_fast_assign(
+		__entry->version = version;
+		__entry->error = error;
+		__assign_str(program, program);
+	),
+
+	TP_printk("program=%sv%u error=%d",
+		__get_str(program), __entry->version, __entry->error
+	)
+);
+
 #endif /* _TRACE_SUNRPC_H */
 
 #include <trace/define_trace.h>

net/sunrpc/svc.c

···
 #endif
 	}
 
+	trace_svc_register(progname, version, protocol, port, family, error);
 	return error;
 }
 
···
 			    unsigned short proto,
 			    unsigned short port)
 {
-	dprintk("svc: svc_register(%sv%d, %s, %u, %u)\n",
-		progp->pg_name, version,
-		proto == IPPROTO_UDP?  "udp" : "tcp",
-		port, family);
-
 	return __svc_register(net, progp->pg_name, progp->pg_prog,
 				version, family, proto, port);
 
···
 		return 0;
 
 	if (vers->vs_hidden) {
-		dprintk("svc: svc_register(%sv%d, %s, %u, %u)"
-			" (but not telling portmap)\n",
-			progp->pg_name, version,
-			proto == IPPROTO_UDP?  "udp" : "tcp",
-			port, family);
+		trace_svc_noregister(progp->pg_name, version, proto,
+				     port, family, 0);
 		return 0;
 	}
 
···
 	if (error == -EPROTONOSUPPORT)
 		error = rpcb_register(net, program, version, 0, 0);
 
-	dprintk("svc: %s(%sv%u), error %d\n",
-			__func__, progname, version, error);
+	trace_svc_unregister(progname, version, error);
 }
 
 /*
···
 				continue;
 			if (progp->pg_vers[i]->vs_hidden)
 				continue;
-
-			dprintk("svc: attempting to unregister %sv%u\n",
-				progp->pg_name, i);
 			__svc_unregister(net, progp->pg_prog, i, progp->pg_name);
 		}
 	}