Accessing a user space variable from a kernel module

[Jeremy Andrus <jeremy@jeremya.com>]

Hello,
  I have written a custom netfilter target that sends a small amount of 
data out over the PCI bus. To get this to work I also wrote an 
associated iptables shared library. Both the kernel netfilter module 
and the user space shared library have "entry" functions that run when 
the kernel module is mod-probed. 
  Here is my dilemma: I can discover the host computer's IP address in 
the user-space function, but I want to send that data out to the PCI 
card. In order to do this, it needs the kernel-mapped, base IO address 
of the card. This is stored in the kernel module. How can I either send 
(make available?) the IP address to the kernel module, or send (make 
available?) the base IO address of the PCI card to the user space 
library function?

Thanks,

	-Jeremy

-- 
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Jeremy C. Andrus
http://www.jeremya.com/
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