linux-kernel - Re: include/linux/netfilter.h after make headers

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Date:	Tue, 20 May 2008 14:21:21 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	greg@...t.cx
Cc:	linux-kernel@...r.kernel.org, netfilter-devel@...r.kernel.org
Subject: Re: include/linux/netfilter.h after make headers_install is
 incomplete

From: "Greg Steuck" <greg@...t.cx>
Date: Tue, 20 May 2008 11:44:56 -0700

> I asked this on netfilter list, but it doesn't seem to be generating any
> interest there. Maybe the question belongs on this list?

No, it does not.  netfilter-devel@...r.kernel.org is the correct place
to discuss this, added to CC:.

Perhaps you sent this to plain "netfilter@...r.kernel.org" or the
older lists which are no longer in use.

> I ran make headers_install in 2.6.25 tree and the installed netfilter.h is
> not complete. Namely, it declares
> union nf_inet_addr {
>       __u32           all[4];
>       __be32          ip;
>       __be32          ip6[4];
> ...
> }
> 
> The __u32, __be32 types are declared in <linux/types.h> and the #include
> directive is removed by the installation process. This in turn makes some
> applications unbuildable against such an exported tree, e.g.
> 
> busybox-1.10.1/networking/tcpudp.c:#include <linux/netfilter_ipv4.h>
> 
> If I correctly understand the purpose of make headers_install, it is
> supposed to generate an API for applications. I could certainly
> make tcpudp.c include linux/types.h, but given that the application
> does not even use nf_inet_addr, this would be the wrong place for
> the fix.
> 
> Is kernel the right place then?
> 
> Thanks
> Greg
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