Re: Sending data between kernel module and user process

[John Levon <moz@compsoc.man.ac.uk>]

On Mon, Aug 06, 2001 at 12:19:49AM +0000, lam wai wm wrote:

> Hi all,
> 
> I have created a kernel module which hook the netfilter, and 
> I'd like a user process to communicate with that module(Sending 
> data between).  Can I use the netlink socket to do that?  If 
> not, what can I do.  Please give some advice to me.  

If you want a user process to communicate with part of the kernel, the simplest
and often best way is to create a misc. char device, and use read(2) and write(2)

alternatively, you might find sysctl() a good solution depending on what you need
to write.

other "less-approved" methods are using procfs or ioctl.

Check the available docs

john, who's thinking this question needs adding to the FAQ

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