var errStr string
	if err != nil {
		errStr = err.Error()
	}
	return madmin.TraceInfo{
		TraceType: madmin.TraceOS,
		Time:      startTime,
		NodeName:  globalLocalNodeName,
		FuncName:  "os." + s.String(),
		Duration:  duration,
		Path:      path,
		Error:     errStr,
	}
}

func updateOSMetrics(s osMetric, paths ...string) func(err error) {

	// Add tracing to the prom. handler
	tracedHandler := http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		tc, ok := r.Context().Value(mcontext.ContextTraceKey).(*mcontext.TraceCtxt)
		if ok {
			tc.FuncName = "handler.MetricsV3"
			tc.ResponseRecorder.LogErrBody = true
		}

		innerHandler.ServeHTTP(w, r)
	})

	// Add authentication
	h.auth(tracedHandler).ServeHTTP(w, r)

}

// healTrace sends healing results to trace output.
func healTrace(funcName healingMetric, startTime time.Time, bucket, object string, opts *madmin.HealOpts, err error, result *madmin.HealResultItem) {
	tr := madmin.TraceInfo{
		TraceType: madmin.TraceHealing,
		Time:      startTime,
		NodeName:  globalLocalNodeName,
		FuncName:  "heal." + funcName.String(),
		Duration:  time.Since(startTime),

	var errStr string
	if err != nil {
		errStr = err.Error()
	}
	return madmin.TraceInfo{
		TraceType: madmin.TraceFTP,
		Time:      startTime,
		NodeName:  globalLocalNodeName,
		FuncName:  s.Method,
		Duration:  time.Since(startTime),
		Path:      s.Filepath,
		Error:     errStr,
		Bytes:     sz,
		Custom: map[string]string{
			"user":   user,
			"cmd":    s.Method,
			"param":  s.Filepath,

	var errStr string
	if err != nil {
		errStr = err.Error()
	}
	return madmin.TraceInfo{
		TraceType: madmin.TraceFTP,
		Time:      startTime,
		NodeName:  globalLocalNodeName,
		FuncName:  s.Cmd,
		Duration:  time.Since(startTime),
		Path:      objPath,
		Error:     errStr,
		Bytes:     sz,
		Custom: map[string]string{
			"user":   s.Sess.LoginUser(),
			"cmd":    s.Cmd,

		if pool == nil {
			globalHTTPStats.addRequestsInQueue(-1)
			f.ServeHTTP(w, r)
			return
		}

		if tc, ok := r.Context().Value(mcontext.ContextTraceKey).(*mcontext.TraceCtxt); ok {
			tc.FuncName = "s3.MaxClients"
		}

		w.Header().Set("X-RateLimit-Limit", strconv.Itoa(cap(pool)))
		w.Header().Set("X-RateLimit-Remaining", strconv.Itoa(cap(pool)-len(pool)))

		ctx := r.Context()
		select {

	return madmin.TraceInfo{
		TraceType: madmin.TraceStorage,
		Time:      startTime,
		NodeName:  globalLocalNodeName,
		FuncName:  "storage." + s.String(),
		Duration:  duration,
		Bytes:     size,
		Path:      path,
		Error:     err,
		Custom:    custom,
	}
}

		registry,
	}

	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		tc, ok := r.Context().Value(mcontext.ContextTraceKey).(*mcontext.TraceCtxt)
		if ok {
			tc.FuncName = funcName
			tc.ResponseRecorder.LogErrBody = true
		}

		mfs, err := gatherers.Gather()
		if err != nil && len(mfs) == 0 {
			writeErrorResponseJSON(r.Context(), w, toAdminAPIErr(r.Context(), err), r.URL)

		notInitialized
}

func bootstrapTraceMsg(msg string) {
	info := madmin.TraceInfo{
		TraceType: madmin.TraceBootstrap,
		Time:      UTCNow(),
		NodeName:  globalLocalNodeName,
		FuncName:  "BOOTSTRAP",
		Message:   fmt.Sprintf("%s %s", getSource(2), msg),
	}
	globalBootstrapTracer.Record(info)

	if serverDebugLog {

	var errStr string
	if err != nil {
		errStr = err.Error()
	}
	return madmin.TraceInfo{
		TraceType: madmin.TraceRebalance,
		Time:      startTime,
		NodeName:  globalLocalNodeName,
		FuncName:  fmt.Sprintf("rebalance.%s (pool-id=%d)", r.String(), poolIdx),
		Duration:  duration,
		Path:      path,
		Error:     errStr,
		Bytes:     sz,
	}
}