linux-kernel - Re: [RFC][PATCH 05/10] f2fs: Export the enums in the tracepoints to userspace

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Message-ID: <20150330024701.GC32033@sejong>
Date:	Mon, 30 Mar 2015 11:47:01 +0900
From:	Namhyung Kim <namhyung@...nel.org>
To:	Steven Rostedt <rostedt@...dmis.org>
Cc:	linux-kernel@...r.kernel.org, Ingo Molnar <mingo@...nel.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Masami Hiramatsu <masami.hiramatsu.pt@...achi.com>,
	Mathieu Desnoyers <mathieu.desnoyers@...icios.com>,
	Namjae Jeon <namjae.jeon@...sung.com>,
	Pankaj Kumar <pankaj.km@...sung.com>,
	Jaegeuk Kim <jaegeuk@...nel.org>
Subject: Re: [RFC][PATCH 05/10] f2fs: Export the enums in the tracepoints to
 userspace

On Fri, Mar 27, 2015 at 05:37:09PM -0400, Steven Rostedt wrote:
> From: "Steven Rostedt (Red Hat)" <rostedt@...dmis.org>
> 
> The tracepoints that use __print_symbolic() use enums as the value
> to convert to strings. Unfortunately, the format files for these
> tracepoints show the enum name and not their value. This causes some
> userspace tools not to know how to convert __print_symbolic() to
> their strings.
> 
> Add TRACE_DEFINE_ENUM() macros to export the enums used to userspace
> to let those tools know what those enum values are.
> 
> Cc: Namjae Jeon <namjae.jeon@...sung.com>
> Cc: Pankaj Kumar <pankaj.km@...sung.com>
> Cc: Jaegeuk Kim <jaegeuk.kim@...sung.com>

AFAIK Jaegeuk's samsung email is not valid anymore..

  $ grep -a Jaegeuk MAINTAINERS
  M:  Jaegeuk Kim <jaegeuk@...nel.org>


Thanks,
Namhyung


> Signed-off-by: Steven Rostedt <rostedt@...dmis.org>
> ---
>  include/trace/events/f2fs.h | 21 +++++++++++++++++++++
>  1 file changed, 21 insertions(+)
> 
> diff --git a/include/trace/events/f2fs.h b/include/trace/events/f2fs.h
> index 5422dbfaf97d..a0074dd8d140 100644
> --- a/include/trace/events/f2fs.h
> +++ b/include/trace/events/f2fs.h
> @@ -9,6 +9,27 @@
>  #define show_dev(entry)		MAJOR(entry->dev), MINOR(entry->dev)
>  #define show_dev_ino(entry)	show_dev(entry), (unsigned long)entry->ino
>  
> +TRACE_DEFINE_ENUM(NODE);
> +TRACE_DEFINE_ENUM(DATA);
> +TRACE_DEFINE_ENUM(META_FLUSH);
> +TRACE_DEFINE_ENUM(CURSEG_HOT_DATA);
> +TRACE_DEFINE_ENUM(CURSEG_WARM_DATA);
> +TRACE_DEFINE_ENUM(CURSEG_COLD_DATA);
> +TRACE_DEFINE_ENUM(CURSEG_HOT_NODE);
> +TRACE_DEFINE_ENUM(CURSEG_WARM_NODE);
> +TRACE_DEFINE_ENUM(CURSEG_COLD_NODE);
> +TRACE_DEFINE_ENUM(NO_CHECK_TYPE);
> +TRACE_DEFINE_ENUM(GC_GREEDY);
> +TRACE_DEFINE_ENUM(GC_CB);
> +TRACE_DEFINE_ENUM(__REQ_RAHEAD);
> +TRACE_DEFINE_ENUM(__REQ_WRITE);
> +TRACE_DEFINE_ENUM(__REQ_SYNC);
> +TRACE_DEFINE_ENUM(__REQ_NOIDLE);
> +TRACE_DEFINE_ENUM(__REQ_FLUSH);
> +TRACE_DEFINE_ENUM(__REQ_FUA);
> +TRACE_DEFINE_ENUM(__REQ_PRIO);
> +TRACE_DEFINE_ENUM(__REQ_META);
> +
>  #define show_block_type(type)						\
>  	__print_symbolic(type,						\
>  		{ NODE,		"NODE" },				\
> -- 
> 2.1.4
> 
> 
> --
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