linux-kernel - Re: [PATCH 12/15] tools lib api: Add configured support for fs

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Date:	Wed, 2 Sep 2015 10:39:31 -0300
From:	Arnaldo Carvalho de Melo <acme@...nel.org>
To:	Jiri Olsa <jolsa@...nel.org>
Cc:	lkml <linux-kernel@...r.kernel.org>,
	David Ahern <dsahern@...il.com>,
	Ingo Molnar <mingo@...nel.org>,
	Namhyung Kim <namhyung@...nel.org>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Matt Fleming <matt@...eblueprint.co.uk>,
	Raphaël Beamonte <raphael.beamonte@...il.com>,
	Steven Rostedt <rostedt@...dmis.org>
Subject: Re: [PATCH 12/15] tools lib api: Add configured support for fs

Em Wed, Sep 02, 2015 at 09:56:42AM +0200, Jiri Olsa escreveu:
> Adding name__mount (where name is in sysfs,procfs,debugfs,tracefs)
> interface that returns bool state of the filesystem mount:
>   true - mounted, false - not mounted

Well, why not take the opportunity and call it... name__mounted()?
"__configured()" is too vague...

Also there was some cut'n'pasting mistake here... if you agree I can fix
it all up and make this change, well, I'm doing it on my local tree,
holler if you have any objection :)

- Arnaldo
 
> It will not try to mount the filesystem.

No FSTYPE__configured() (to-be FSTYPE__mounted()) doesn't mount
anything, that is what FSTYPE__mount() does :-) 

- Arnaldo
 
> Link: http://lkml.kernel.org/n/tip-csvlq2hr43ys3u7nfs2up9y9@git.kernel.org
> Signed-off-by: Jiri Olsa <jolsa@...nel.org>
> ---
>  tools/lib/api/fs/fs.c | 23 ++++++++++++++---------
>  tools/lib/api/fs/fs.h |  5 ++++-
>  2 files changed, 18 insertions(+), 10 deletions(-)
> 
> diff --git a/tools/lib/api/fs/fs.c b/tools/lib/api/fs/fs.c
> index bc93baf33fff..8afe08a99bc6 100644
> --- a/tools/lib/api/fs/fs.c
> +++ b/tools/lib/api/fs/fs.c
> @@ -244,15 +244,20 @@ static const char *fs__mount(int idx)
>  	return fs__check_mounts(fs) ? fs->path : NULL;
>  }
>  
> -#define FS(name, idx)			\
> -const char *name##__mountpoint(void)	\
> -{					\
> -	return fs__mountpoint(idx);	\
> -}					\
> -					\
> -const char *name##__mount(void)		\
> -{					\
> -	return fs__mount(idx);		\
> +#define FS(name, idx)				\
> +const char *name##__mountpoint(void)		\
> +{						\
> +	return fs__mountpoint(idx);		\
> +}						\
> +						\
> +const char *name##__mount(void)			\
> +{						\
> +	return fs__mount(idx);			\
> +}						\
> +						\
> +bool name##__configured(void)			\
> +{						\
> +	return name##__mountpoint() != NULL;	\
>  }
>  
>  FS(sysfs,   FS__SYSFS);
> diff --git a/tools/lib/api/fs/fs.h b/tools/lib/api/fs/fs.h
> index a9627ea5e6ae..f654bcb99d1e 100644
> --- a/tools/lib/api/fs/fs.h
> +++ b/tools/lib/api/fs/fs.h
> @@ -1,6 +1,8 @@
>  #ifndef __API_FS__
>  #define __API_FS__
>  
> +#include <stdbool.h>
> +
>  /*
>   * On most systems <limits.h> would have given us this, but  not on some systems
>   * (e.g. GNU/Hurd).
> @@ -11,7 +13,8 @@
>  
>  #define FS(name)				\
>  	const char *name##__mountpoint(void);	\
> -	const char *name##__mount(void);
> +	const char *name##__mount(void);	\
> +	bool name##__configured(void);		\
>  
>  FS(sysfs)
>  FS(procfs)
> -- 
> 2.4.3
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