netdev - Re: [PATCHv6 1/3] tun: export underlying socket

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Message-Id: <200911041909.06054.arnd@arndb.de>
Date:	Wed, 4 Nov 2009 19:09:05 +0100
From:	Arnd Bergmann <arnd@...db.de>
To:	virtualization@...ts.linux-foundation.org
Cc:	"Michael S. Tsirkin" <mst@...hat.com>, netdev@...r.kernel.org,
	kvm@...r.kernel.org, linux-kernel@...r.kernel.org, mingo@...e.hu,
	linux-mm@...ck.org, akpm@...ux-foundation.org, hpa@...or.com,
	gregory.haskins@...il.com, Rusty Russell <rusty@...tcorp.com.au>,
	s.hetze@...ux-ag.com
Subject: Re: [PATCHv6 1/3] tun: export underlying socket

On Tuesday 03 November 2009, Arnd Bergmann wrote:
> > index 3f5fd52..404abe0 100644
> > --- a/include/linux/if_tun.h
> > +++ b/include/linux/if_tun.h
> > @@ -86,4 +86,18 @@ struct tun_filter {
> >         __u8   addr[0][ETH_ALEN];
> >  };
> >  
> > +#ifdef __KERNEL__
> > +#if defined(CONFIG_TUN) || defined(CONFIG_TUN_MODULE)
> > +struct socket *tun_get_socket(struct file *);
> > +#else
> > +#include <linux/err.h>
> > +#include <linux/errno.h>
> > +struct file;
> > +struct socket;
> > +static inline struct socket *tun_get_socket(struct file *f)
> > +{
> > +       return ERR_PTR(-EINVAL);
> > +}
> > +#endif /* CONFIG_TUN */
> > +#endif /* __KERNEL__ */
> >  #endif /* __IF_TUN_H */
> 
> Is this a leftover from testing? Exporting the function for !__KERNEL__
> seems pointless.
> 

Michael, you didn't reply on this comment and the code is still there in v8.
Do you actually need this? What for?

	Arnd <><
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