linux-kernel - Re: [PATCH net-next] netfilter: ipv6: Fix build error without CONFIG

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Message-ID: <20190620155016.6kk7xi4wldm5ijyh@salvia>
Date:   Thu, 20 Jun 2019 17:50:16 +0200
From:   Pablo Neira Ayuso <pablo@...filter.org>
To:     Yuehaibing <yuehaibing@...wei.com>
Cc:     kadlec@...ckhole.kfki.hu, fw@...len.de, davem@...emloft.net,
        rdunlap@...radead.org, linux-kernel@...r.kernel.org,
        coreteam@...filter.org, netfilter-devel@...r.kernel.org,
        netdev@...r.kernel.org
Subject: Re: [PATCH net-next] netfilter: ipv6: Fix build error without
 CONFIG_IPV6

On Thu, Jun 20, 2019 at 11:26:01PM +0800, Yuehaibing wrote:
> Friendly ping...
> 
> On 2019/6/12 16:47, YueHaibing wrote:
> > If CONFIG_IPV6 is not set, building fails:
> > 
> > net/bridge/netfilter/nf_conntrack_bridge.o: In function `nf_ct_bridge_pre':
> > nf_conntrack_bridge.c:(.text+0x41c): undefined symbol `nf_ct_frag6_gather'
> > net/bridge/netfilter/nf_conntrack_bridge.o: In function `nf_ct_bridge_post':
> > nf_conntrack_bridge.c:(.text+0x820): undefined symbol `br_ip6_fragment'

Is this one enough to fix this problem?

https://git.kernel.org/pub/scm/linux/kernel/git/pablo/nf-next.git/commit/?id=16e6427c88c5b7e7b6612f6c286d5f71d659e5be

Thanks.

> > Reported-by: Hulk Robot <hulkci@...wei.com>
> > Reported-by: Randy Dunlap <rdunlap@...radead.org>
> > Fixes: c9bb6165a16e ("netfilter: nf_conntrack_bridge: fix CONFIG_IPV6=y")
> > Signed-off-by: YueHaibing <yuehaibing@...wei.com>
> > ---
> >  include/linux/netfilter_ipv6.h | 10 ++++++++--
> >  1 file changed, 8 insertions(+), 2 deletions(-)
> > 
> > diff --git a/include/linux/netfilter_ipv6.h b/include/linux/netfilter_ipv6.h
> > index 3a3dc4b..0e1febc 100644
> > --- a/include/linux/netfilter_ipv6.h
> > +++ b/include/linux/netfilter_ipv6.h
> > @@ -108,8 +108,11 @@ static inline int nf_ipv6_br_defrag(struct net *net, struct sk_buff *skb,
> >  		return 1;
> >  
> >  	return v6_ops->br_defrag(net, skb, user);
> > -#else
> > +#endif
> > +#if IS_BUILTIN(CONFIG_IPV6)
> >  	return nf_ct_frag6_gather(net, skb, user);
> > +#else
> > +	return 1;
> >  #endif
> >  }
> >  
> > @@ -133,8 +136,11 @@ static inline int nf_br_ip6_fragment(struct net *net, struct sock *sk,
> >  		return 1;
> >  
> >  	return v6_ops->br_fragment(net, sk, skb, data, output);
> > -#else
> > +#endif
> > +#if IS_BUILTIN(CONFIG_IPV6)
> >  	return br_ip6_fragment(net, sk, skb, data, output);
> > +#else
> > +	return 1;
> >  #endif
> >  }
> >  
> > 
>