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Date: Fri, 16 Jun 2006 16:58:00 -0700
From: Greg KH <greg@kroah.com>
To: Daniele orlandi <daniele@orlandi.com>
Cc: linux-kernel@vger.kernel.org
Subject: Re: Passing references to kobjects between userland and kernel
Message-ID: <20060616235800.GA29573@kroah.com>
References: <200606141626.39273.daniele@orlandi.com>
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On Wed, Jun 14, 2006 at 04:26:38PM +0200, Daniele orlandi wrote:
> 
> Hello,
> 
> I'm trying to figure out what is the correct way to pass references to 
> kobjects between userland and kernel space.

Use the kobject_uevent() call from kernelspace to let userspace know
whatever you want it to.  That is what it is there for :)

> 
> I have my big object hierarchy of kobjects representing a TDM interconnect 
> graph with channels, crossconnectors, physical ports and so on.
> The main objects are nodes and archs; archs connect two nodes together.
> 
> The hierarchy is exported to sysfs.
> 
> From userland I want to tell the kernel "Connect node X to node Y".

Then use the names of the kobjects within your subdirectory.  They have
to be unique so you should be safe.

Or use configfs :)

thanks,

greg k-h