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Re: [Xen-devel] Q on ioctl support in netfront/netback

from [ravi kerur] [Permanent Link][Original]
To: Paul Durrant <paul.durrant@xxxxxxxxxx>
Subject: Re: [Xen-devel] Q on ioctl support in netfront/netback
From: ravi kerur <rkerur@xxxxxxxxx>
Date: Mon, 15 Feb 2010 07:54:02 -0800
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Paul,

Registers are not in netback, they are h/w registers on NIC and the driver supports reads/writes via ioctl calls. Driver is in dom0 and application which reads/writes registers is run in domU.

-RK

On Mon, Feb 15, 2010 at 1:40 AM, Paul Durrant <paul.durrant@xxxxxxxxxx> wrote:
ravi kerur wrote:

Our network driver support ioctl calls from applications for register reads/writes. I am wondering can ioctl calls be supported from domU to dom0? i.e call flow will be

application invokes ioctl ---> netfront ioctl ----->via xenbus ------> netback ioctl ------> to actual driver in dom0

with the return path in similar fashion.


I'm wondering precisely what register in netback you wish to access?

--
===============================
Paul Durrant, Software Engineer

Citrix Systems (R&D) Ltd.
First Floor, Building 101
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United Kingdom
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