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

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Date:	Wed, 2 Sep 2015 10:41:26 -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 10:39:31AM -0300, Arnaldo Carvalho de Melo escreveu:
> 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 :-) 

Argh, now it was me confused, right, __configured() or __mounted()
doesn'try to mount anything, as you said, it is just the "Adding
name__mount() that in the beginning that needs fixing, the rest of my
comment stands.

- Arnaldo

> 
> - 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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