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Date: Fri, 6 Mar 2009 17:10:28 +0100
From: Luigi Rizzo <rizzo@iet.unipi.it>
To: Vadim Goncharov <vadim_nuclight@mail.ru>
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Cc: freebsd-arch@freebsd.org
Subject: Re: spliting kernel ipfw source ? (also involves sctp)
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On Fri, Mar 06, 2009 at 12:40:47PM +0000, Vadim Goncharov wrote:
> Hi Luigi Rizzo! 
> 
> On Mon, 2 Mar 2009 20:01:57 +0100; Luigi Rizzo wrote about 'Re: spliting kernel ipfw source ? (also involves sctp)':
> 
> >>>>>Hi, I am planning to split netinet/ip_fw2.c in a number of smaller files 
> >>>>>to make it more manageable, and while i do this I would also like to 
> >>>>>move the files related to ipfw2 (namely ip_fw*c) to a better place. Any 
> >>>>>objection to moving them to sys/netinet/ipfw2 ? Also, I can't help 
> 
> [...]
> 
> > To further clarify, my plan is the following:
> 
> > - leave ip_fw.h and ip_dummynet.h in /sys/netinet in case
> >   userland code is dependent on their location;
> > - create /sys/netinet/ipfw/ to hold the kernel .c files related to
> >   ipfw and possibly dummynet (and also their private headers if any);
> 
> Exactly that and nothing more? I'm currently working on extending ipfw for
> Foundation with userland interface will be changed (and I thinking about
> introducing modules), what else do you plan to do?

Generally speaking, the kernel/userland interface will remain
unchanged both at binary and source level, which means no
backward incompatible changes in the sockopt numbers and messages,
and no changes in the location and userland-visible parts of
the headers.

In practical terms, ip_fw.h might lose the definition of
struct ip_fw_args, or the prototypes for the various kernel
functions. The #ifdef _KERNEL part of ip_dummynet.h should
also go to some other file.

If you want to contact me, on the list or offline, to discuss what
you want to do or what kind of 'modules' (kernel or userland ?) are
you thinking about, i'd be more than happy to help.

	cheers
	luigi