From mboxrd@z Thu Jan  1 00:00:00 1970
From: =?UTF-8?Q?R=C3=A9mi_Denis-Courmont?= <remi@remlab.net>
Subject: Re: user-to-kernel shared memory with =?UTF-8?Q?net=5Fdevice?=
Date: Tue, 20 Oct 2009 08:47:56 +0200
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To: Chris Ross <chris@compilednetworks.com>
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On Mon, 19 Oct 2009 16:28:42 -0500, Chris Ross <chris@compilednetworks.=
com>=0D
wrote:=0D
> All of the mmap examples I can find seem to be for character devices.=
=0D
> Do I need a character device that implements mmap and proxies access=0D
> to the net_device's stats, or is there a way to mmap directly to a=0D
> net_device structure? Also, is this the excepted method when a=0D
> userspace process needs to read large tables from a driver?=0D
=0D
You cannot use mmap() directly on a network device as there are no file=
=0D
descriptors to network devices. In principle, you can still initiate a=0D
memory mapping using a network device ioctl(), but this is probably not=
=0D
such a great idea.=0D
=0D
-- =0D
R=C3=A9mi Denis-Courmont