c.trace = &tracer{
		Publisher: p,
		TraceType: madmin.TraceInternal,
		Prefix:    "grid",
		Local:     c.Local,
		Remote:    c.Remote,
		Subroute:  "",
	}
}

// subroute adds a specific subroute to the request.
func (c *tracer) subroute(subroute string) *tracer {
	if c == nil {
		return nil
	}
	c2 := *c
	c2.Subroute = subroute