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

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Message-ID: <4833F1E7.5050700@trash.net>
Date:	Wed, 21 May 2008 11:56:55 +0200
From:	Patrick McHardy <kaber@...sh.net>
To:	David Miller <davem@...emloft.net>
CC:	greg@...t.cx, linux-kernel@...r.kernel.org,
	netfilter-devel@...r.kernel.org, Sam Ravnborg <sam@...nborg.org>
Subject: Re: include/linux/netfilter.h after make headers_install is incomplete

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

These types are used by countless header files. I don't know
why types.h is stripped, I guess this question can be best
answered by whoever maintains the header-install stuff (Sam?
I don't know).

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