netdev - user-to-kernel shared memory with net

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Date:	Mon, 19 Oct 2009 16:28:42 -0500
From:	Chris Ross <chris@...pilednetworks.com>
To:	netdev <netdev@...r.kernel.org>
Subject: user-to-kernel shared memory with net_device

I have a net_device driver that has a fairly large (1-2MB) set of
stats that a user space process needs to read from time to time. I had
assumed the optimal ipc mechanism would be shared memory. Now that I'm
getting around to implementation of this side of the project I'm
getting a bit stuck.

All of the mmap examples I can find seem to be for character devices.
Do I need a character device that implements mmap and proxies access
to the net_device's stats, or is there a way to mmap directly to a
net_device structure? Also, is this the excepted method when a
userspace process needs to read large tables from a driver?

thanks,

-chris
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