[PATCH v6 04/24] tracing: Add reset to trace remotes

[Vincent Donnefort]

On Mon, Sep 08, 2025 at 07:37:57PM -0400, Steven Rostedt wrote:
> On Thu, 21 Aug 2025 09:13:52 +0100
> Vincent Donnefort <vdonnefort at google.com> wrote:
> 
> > @@ -400,7 +436,9 @@ static int trace_remote_init_tracefs(const char *name, struct trace_remote *remo
> >  	    !trace_create_file("buffer_size_kb", TRACEFS_MODE_WRITE, remote_d, remote,
> >  			       &buffer_size_kb_fops) ||
> >  	    !trace_create_file("trace_pipe", TRACEFS_MODE_READ, remote_d, remote,
> > -			       &trace_pipe_fops))
> > +			       &trace_pipe_fops) ||
> > +	    !trace_create_file("trace", 0200, remote_d, remote,
> > +			       &trace_fops))
> >  		goto err;
> >  
> >  	percpu_d = tracefs_create_dir("per_cpu", remote_d);
> > @@ -422,7 +460,9 @@ static int trace_remote_init_tracefs(const char *name, struct trace_remote *remo
> >  		}
> >  
> >  		if (!trace_create_cpu_file("trace_pipe", TRACEFS_MODE_READ, cpu_d, remote, cpu,
> > -					   &trace_pipe_fops))
> > +					   &trace_pipe_fops) ||
> > +		    !trace_create_cpu_file("trace", 0200, cpu_d, remote, cpu,
> > +					   &trace_fops))
> >  			goto err;
> >  	}
> 
> I wonder if we should name the file "reset" to not be confusing to users
> when they cat the file and it doesn't produce any output.

My idea was to keep the exact same interface as the rest of the tracing. I could
keep that /trace file for compatibility and add /reset?

"cat trace" could also just returns a text like *** not supported *** ?

> 
> -- Steve