Re: opening files in /proc, and modules

[Brian Gerst <bgerst@didntduck.org>]

Michael Rothwell wrote:
> 
> How can I detect that open() has been called on a file in procfs that a
> module provides? If I modprobe my module, open one or more if its proc
> entries, then rmmod the module while the proc files are still open, then
> the deletion of those entries is deferred. When I close the file(s), the
> kernel oopses. I need to be able to detect open() and close() in order
> to increment/decrement the reference count for my module, to prevent it
> from being rmmoded when in use. Any tips?
> 
> Thanks!

Really, the procfs needs a pointer to the module so it can do the
reference before calling the code in the module.

--

				Brian Gerst