netdev - Re: [PATCH net-next v2 5/9] net: openvswitch: add emit

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Date: Wed, 5 Jun 2024 21:06:02 +0100
From: Simon Horman <horms@...nel.org>
To: Adrián Moreno <amorenoz@...hat.com>
Cc: kernel test robot <lkp@...el.com>, netdev@...r.kernel.org,
	llvm@...ts.linux.dev, oe-kbuild-all@...ts.linux.dev,
	aconole@...hat.com, echaudro@...hat.com, i.maximets@....org,
	dev@...nvswitch.org, Donald Hunter <donald.hunter@...il.com>,
	Jakub Kicinski <kuba@...nel.org>,
	Eric Dumazet <edumazet@...gle.com>, Paolo Abeni <pabeni@...hat.com>,
	Pravin B Shelar <pshelar@....org>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH net-next v2 5/9] net: openvswitch: add emit_sample action

On Wed, Jun 05, 2024 at 07:31:55PM +0000, Adrián Moreno wrote:
> On Wed, Jun 05, 2024 at 08:29:22AM GMT, kernel test robot wrote:
> > Hi Adrian,
> >
> > kernel test robot noticed the following build errors:
> >
> > [auto build test ERROR on net-next/main]
> >
> > url:    https://github.com/intel-lab-lkp/linux/commits/Adrian-Moreno/net-psample-add-user-cookie/20240604-030055
> > base:   net-next/main
> > patch link:    https://lore.kernel.org/r/20240603185647.2310748-6-amorenoz%40redhat.com
> > patch subject: [PATCH net-next v2 5/9] net: openvswitch: add emit_sample action
> > config: s390-randconfig-002-20240605 (https://download.01.org/0day-ci/archive/20240605/202406050852.hDtfskO0-lkp@intel.com/config)
> > compiler: clang version 19.0.0git (https://github.com/llvm/llvm-project d7d2d4f53fc79b4b58e8d8d08151b577c3699d4a)
> > reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240605/202406050852.hDtfskO0-lkp@intel.com/reproduce)
> >
> > If you fix the issue in a separate patch/commit (i.e. not just a new version of
> > the same patch/commit), kindly add following tags
> > | Reported-by: kernel test robot <lkp@...el.com>
> > | Closes: https://lore.kernel.org/oe-kbuild-all/202406050852.hDtfskO0-lkp@intel.com/
> >
> > All errors (new ones prefixed by >>):
> >
> >    s390x-linux-ld: net/openvswitch/actions.o: in function `do_execute_actions':
> > >> actions.c:(.text+0x1d5c): undefined reference to `psample_sample_packet'
> >
> 
> Thanks robot!
> 
> OK, I think I know what's wrong. There is an optional dependency with
> PSAMPLE. Openvswitch module does compile without PSAMPLE but there is a
> link error if OPENVSWITCH=y and PSAMPLE=m.
> 
> Looking into how to express this in the Kconfig, I'm planning to add the
> following to the next version of the series.
> 
> diff --git a/net/openvswitch/Kconfig b/net/openvswitch/Kconfig
> index 29a7081858cd..2535f3f9f462 100644
> --- a/net/openvswitch/Kconfig
> +++ b/net/openvswitch/Kconfig
> @@ -10,6 +10,7 @@ config OPENVSWITCH
>  		   (NF_CONNTRACK && ((!NF_DEFRAG_IPV6 || NF_DEFRAG_IPV6) && \
>  				     (!NF_NAT || NF_NAT) && \
>  				     (!NETFILTER_CONNCOUNT || NETFILTER_CONNCOUNT)))
> +	depends on PSAMPLE || !PSAMPLE
>  	select LIBCRC32C
>  	select MPLS
>  	select NET_MPLS_GSO
> 

Thanks Adrián,

I both agree that should work, and tested with the config at the link above
and found that it does work.