linux-kernel - Re: [PATCH] Implement uhook(call kernel func from userspace) driver

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Message-ID: <20120623150757.GB2515@kroah.com>
Date:	Sat, 23 Jun 2012 08:07:57 -0700
From:	Greg KH <gregkh@...uxfoundation.org>
To:	Peiyong Feng <peiyong.feng.kernel@...il.com>
Cc:	devel@...verdev.osuosl.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] Implement uhook(call kernel func from userspace) driver

On Sat, Jun 23, 2012 at 02:01:59PM +0800, Peiyong Feng wrote:
> 2012/6/23 Greg KH <gregkh@...uxfoundation.org>:
> > On Sat, Jun 23, 2012 at 12:18:29PM +0800, Peiyong Feng wrote:
> >> 2012/6/23 Greg KH <gregkh@...uxfoundation.org>:
> >> > On Sat, Jun 23, 2012 at 11:20:35AM +0800, Peiyong Feng wrote:
> >> >> Hi all,
> >> >>
> >> >> This patch implement the uhook kernel driver. Here are some ideals and
> >> >> explanations:
> >> >>
> >> >> 1. What is uhook
> >> >>
> >> >> uhook(userspace kernel hook) means call kernel function from
> >> >> userspace. That is to say, we can
> >> >>
> >> >> write a function in kernel space and call it in userspace while the
> >> >> kernel Image is running. For example:
> >> >
> >> > That's, um, "interesting", but is of course, nothing we can accept into
> >> > the main kernel tree, as I'm sure you can understand.  Otherwise, you
> >> > just created a few thousand undocumented system calls whose behavior
> >> > changes every release which is not something we can accept.
> >> >
> >> > But it is a great hack, very nicely done.  I'm sure that some people
> >> > will like it for debugging, although I'm not quite sure you got all of
> >>
> >> Well, is there some other tree I can commit the patch?
> >
> > What do you mean by this?
> 
> I mean that although the main line kernel cannot accept this patch, and
> uhook is very useful to play a rule as a debug tool. Is there some where else
> that can hold this tool, and let more people use the uhook?

Not that I know of.  As someone pointed out, use github to host it on
your own if you want, that is probably the best.

greg k-h
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