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Re: [Qemu-devel] Re: [PATCH 9/9] Introduce VLANClientState::cleanup()

From: Anthony Liguori
Subject: Re: [Qemu-devel] Re: [PATCH 9/9] Introduce VLANClientState::cleanup()
Date: Tue, 28 Apr 2009 12:25:41 -0500
User-agent: Thunderbird (X11/20090320)

Paul Brook wrote:
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?

Roughly, VLANClientState would be the backend. There are too many details about VLAN though in VLANClientState today beyond the name.

Ideally, the network backend would just consistent of an interface to submit packets, register buffers to receive packets, an interface to negotiate/enable features (GSO, checksum offload), and a means to get configuration information (MAC address).

Today, you're given a VLAN and then you create a VLANClient from the VLAN. That's too much implementation detail to live in the devices IMHO.


Anthony Liguori

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