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From: Paul Brook <paul@codesourcery.com>
Subject: Re: [Qemu-devel] Re: [PATCH 9/9] Introduce VLANClientState::cleanup()
Date: Tue, 28 Apr 2009 18:17:55 +0100
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To: qemu-devel@nongnu.org
Cc: Mark McLoughlin <markmc@redhat.com>, Anthony Liguori <aliguori@us.ibm.com>, Marcelo Tosatti <mtosatti@redhat.com>, Markus Armbruster <armbru@redhat.com>

> 1) Network backend is created.  As part of the configuration of the
> backend, a unique device identifier is associated with it.
> 2) A PCI device is created.
>   a) The PCI device creates one or more Network frontends.  Each
> frontend carries the device identifier and perhaps something like a port
> id. b) When the PCI device is destroyed, it destroys any frontends it owns.

This sounds about right, though I'm not entirely sure what you mean 
by "network backend". backend ~= vlan in the current implementation?

Paul