Re: [PATCH v3 3/6] trace-cmd: Add tracecmd_create_recorder_virt function

[Steven Rostedt <rostedt@goodmis.org>]

On Mon, 14 Jan 2019 17:27:57 +0200
Slavomir Kaslev <kaslevs@vmware.com> wrote:


> @@ -194,8 +196,9 @@ tracecmd_create_buffer_recorder_fd(int fd, int cpu, unsigned flags, const char *
>  	return tracecmd_create_buffer_recorder_fd2(fd, -1, cpu, flags, buffer, 0);
>  }
>  
> -struct tracecmd_recorder *
> -tracecmd_create_buffer_recorder(const char *file, int cpu, unsigned flags, const char *buffer)
> +static struct tracecmd_recorder *
> +__tracecmd_create_buffer_recorder(const char *file, int cpu, unsigned flags,
> +				  const char *buffer)
>  {
>  	struct tracecmd_recorder *recorder;
>  	int fd;
> @@ -258,6 +261,26 @@ tracecmd_create_buffer_recorder_maxkb(const char *file, int cpu, unsigned flags,
>  	goto out;
>  }
>  
> +struct tracecmd_recorder *
> +tracecmd_create_buffer_recorder(const char *file, int cpu, unsigned flags,
> +				const char *buffer)
> +{
> +	return __tracecmd_create_buffer_recorder(file, cpu, flags, buffer);
> +}
> +
> +struct tracecmd_recorder *
> +tracecmd_create_recorder_virt(const char *file, int cpu, int trace_fd)

As this looks to be something that may be a library call someday, I
would keep flags as a parameter.

> +{
> +	struct tracecmd_recorder *recorder;
> +
> +	recorder = __tracecmd_create_buffer_recorder(
> +		file, cpu, TRACECMD_RECORD_NOSPLICE, NULL);

Then you could pass this as:

	recorder = __tracecmd_create_buffer_recorder(file, cpu,
			flags | TRACECMD_RECORD_NOSPLICE, NULL);

-- Steve

> +	if (recorder)
> +		recorder->trace_fd = trace_fd;
> +
> +	return recorder;
> +}
> +
>  struct tracecmd_recorder *tracecmd_create_recorder_fd(int fd, int cpu, unsigned flags)
>  {
>  	const char *tracing;