Date: Mon, 29 Mar 2004 12:45:42 +0300
From: Pavel Mironchik <p.mironchik@sam-solutions.net>
To: karim@opersys.com
Cc: linux-kernel@vger.kernel.org
Subject: Re: Kernel / Userspace Data Transfer
Message-Id: <20040329124542.019edd8b.p.mironchik@sam-solutions.net>
In-Reply-To: <406799F3.1020508@opersys.com>
References: <1080528430.40678e2e9eb3a@www.beonline.com.au>
	<406799F3.1020508@opersys.com>
Organization: Sam-Solutions
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The best Userspace-kernelspace-Userspace transfer thing is soket.
Unix or TCP/UDP sockets API is avaible from kernel space.
You should use it...

Pavel Mironchik


On Sun, 28 Mar 2004 22:37:23 -0500
Karim Yaghmour <karim@opersys.com> wrote:

> 
> lml@beonline.com.au wrote:
> > I have a set of counters in a Kernel module that i want to export to a
> > userspace application. I originally decided to use a /proc entry and parse
> > the output whenever the userspace application needed this data, however,
> > i need more than the 4096 that is allowed in /proc and i'm not too keen
> > on parsing large chunks of text anyway.
> > 
> > What i would like to do is copy these slabs of text from the kernel to my
> > userspace application (whenever the application requests it). I've seen the
> > 'copy_to_user' function and it looks usefull, but have no idea where to start
> > or how to use it :-/
> > 
> > Can someone provide and example or point me in the right direction? Or is there
> > a better place to ask this question?
> 
> relayfs has been designed with this type of requirements in mind:
> http://www.opersys.com/relayfs/index.html
> 
> Karim
> -- 
> Author, Speaker, Developer, Consultant
> Pushing Embedded and Real-Time Linux Systems Beyond the Limits
> http://www.opersys.com || karim@opersys.com || 1-866-677-4546
> 
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