netdev - Re: [PATCH] net: Default UDP and UNIX diag to 'n'.

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Date:	Tue, 7 Feb 2012 14:51:20 +0100
From:	Anisse Astier <anisse@...ier.eu>
To:	Pavel Emelyanov <xemul@...allels.com>
Cc:	David Miller <davem@...emloft.net>,
	"netdev@...r.kernel.org" <netdev@...r.kernel.org>,
	Eric Dumazet <eric.dumazet@...il.com>
Subject: Re: [PATCH] net: Default UDP and UNIX diag to 'n'.

On Tue, 07 Feb 2012 17:37:51 +0400, Pavel Emelyanov <xemul@...allels.com> wrote :

> >> diff --git a/net/ipv4/Kconfig b/net/ipv4/Kconfig
> >> index 1a8f93b..43e1439 100644
> >> --- a/net/ipv4/Kconfig
> >> +++ b/net/ipv4/Kconfig
> >> @@ -410,8 +410,12 @@ config INET_TCP_DIAG
> >>  	def_tristate INET_DIAG
> >>  
> >>  config INET_UDP_DIAG
> >> +	tristate "UDP: socket monitoring interface"
> >>  	depends on INET_DIAG
> >> -	def_tristate INET_DIAG && IPV6
> > This broke earlier patch 
> > b872a2371ffd13e6d83423ef621a707df4c158ac "udp_diag: Make it module when ipv6 is a module",
> > which brings back the compilation error when compiling linus master (v3.3-rc2+):
> > 
> > net/built-in.o: In function `udp_dump_one':
> > udp_diag.c:(.text+0x59852): undefined reference to `__udp6_lib_lookup'
> > 
> > 
> >> +	default n
> >> +	---help---
> >> +	  Support for UDP socket monitoring interface used by the ss tool.
> >> +	  If unsure, say Y.
> >>  
> 
> I assume you have CONFIG_IPV6=m and CONFIG_INET_UDP_DIAG=y, right?

That's correct.

> This one should fix the issue, you'll not be able to set it to Y when
> IPV6 is M.

Indeed, it fixes the issue, but it also prevents using UDP_DIAG without
IPv6 (just like the previous patch I guess.). Not a problem for me.

> 
> 
> [PATCH] udp_diag: Add dependency on IPV6
> 
> Signed-off-by: Pavel Emelyanov <xemul@...allels.com>
> 
> diff --git a/net/ipv4/Kconfig b/net/ipv4/Kconfig
> index aa2a2c7..55d39a4 100644
> --- a/net/ipv4/Kconfig
> +++ b/net/ipv4/Kconfig
> @@ -409,7 +409,7 @@ config INET_TCP_DIAG
>  
>  config INET_UDP_DIAG
>  	tristate "UDP: socket monitoring interface"
> -	depends on INET_DIAG
> +	depends on INET_DIAG && IPV6
>  	default n
>  	---help---
>  	  Support for UDP socket monitoring interface used by the ss tool.
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