linux-kernel - Re: [patch 3/8] procfs: Add ability to plug in auxiliary fdinfo providers

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Date:	Thu, 16 Aug 2012 01:34:49 +0400
From:	Cyrill Gorcunov <gorcunov@...nvz.org>
To:	Al Viro <viro@...IV.linux.org.uk>
Cc:	linux-kernel@...r.kernel.org, linux-fsdevel@...r.kernel.org,
	Alexey Dobriyan <adobriyan@...il.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Pavel Emelyanov <xemul@...allels.com>,
	James Bottomley <jbottomley@...allels.com>,
	Matthew Helsley <matt.helsley@...il.com>
Subject: Re: [patch 3/8] procfs: Add ability to plug in auxiliary fdinfo
 providers

On Wed, Aug 15, 2012 at 10:29:27PM +0100, Al Viro wrote:
> 
> This, BTW, is too convoluted for its own good.  What you need is
> something like
> struct whatever {
> 	struct seq_file *m;
> 	struct file *f;
> 	int flags;
> };
> with single allocation of that sucker in your ->open().  Set
> file->private_data to address of seq_file field in your object *before*
> calling seq_open() and don't bother with m->private at all - just use
> container_of(m, struct whatever, m) in your ->show() to get to that
> structure...

I will try and post results, thanks!

	Cyrill
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