netdev - Re: [net:master 21/30] net/netfilter/xt_socket.c:224:3: error: implicit declaration of function 'nf_defrag_ipv6

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Date:   Fri, 11 Feb 2022 18:43:45 -0800
From:   Eric Dumazet <edumazet@...gle.com>
To:     kernel test robot <lkp@...el.com>
Cc:     llvm@...ts.linux.dev, kbuild-all@...ts.01.org,
        netdev <netdev@...r.kernel.org>,
        Pablo Neira Ayuso <pablo@...filter.org>,
        Florian Westphal <fw@...len.de>
Subject: Re: [net:master 21/30] net/netfilter/xt_socket.c:224:3: error:
 implicit declaration of function 'nf_defrag_ipv6_disable'

On Fri, Feb 11, 2022 at 1:55 PM kernel test robot <lkp@...el.com> wrote:
>
> tree:   https://git.kernel.org/pub/scm/linux/kernel/git/davem/net.git master
> head:   85d24ad38bc4658ce9a16b85b9c8dc0577d66c71
> commit: 75063c9294fb239bbe64eb72141b6871fe526d29 [21/30] netfilter: xt_socket: fix a typo in socket_mt_destroy()
> config: hexagon-randconfig-r045-20220211 (https://download.01.org/0day-ci/archive/20220212/202202120509.FMR7TEL1-lkp@intel.com/config)
> compiler: clang version 15.0.0 (https://github.com/llvm/llvm-project f6685f774697c85d6a352dcea013f46a99f9fe31)
> reproduce (this is a W=1 build):
>         wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
>         chmod +x ~/bin/make.cross
>         # https://git.kernel.org/pub/scm/linux/kernel/git/davem/net.git/commit/?id=75063c9294fb239bbe64eb72141b6871fe526d29
>         git remote add net https://git.kernel.org/pub/scm/linux/kernel/git/davem/net.git
>         git fetch --no-tags net master
>         git checkout 75063c9294fb239bbe64eb72141b6871fe526d29
>         # save the config file to linux build tree
>         mkdir build_dir
>         COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=hexagon SHELL=/bin/bash net/netfilter/
>
> If you fix the issue, kindly add following tag as appropriate
> Reported-by: kernel test robot <lkp@...el.com>
>
> All errors (new ones prefixed by >>):
>
> >> net/netfilter/xt_socket.c:224:3: error: implicit declaration of function 'nf_defrag_ipv6_disable' [-Werror,-Wimplicit-function-declaration]
>                    nf_defrag_ipv6_disable(par->net);
>                    ^
>    net/netfilter/xt_socket.c:224:3: note: did you mean 'nf_defrag_ipv4_disable'?
>    include/net/netfilter/ipv4/nf_defrag_ipv4.h:7:6: note: 'nf_defrag_ipv4_disable' declared here
>    void nf_defrag_ipv4_disable(struct net *net);
>         ^
>    1 error generated.
>

I guess something like this is needed ?

diff --git a/net/netfilter/xt_socket.c b/net/netfilter/xt_socket.c
index 662e5eb1cc39e544191b3aab388c3762674d9251..7013f55f05d1ebca3b13d29934d8f6abc1ef36f0
100644
--- a/net/netfilter/xt_socket.c
+++ b/net/netfilter/xt_socket.c
@@ -220,8 +220,10 @@ static void socket_mt_destroy(const struct
xt_mtdtor_param *par)
 {
        if (par->family == NFPROTO_IPV4)
                nf_defrag_ipv4_disable(par->net);
+#if IS_ENABLED(CONFIG_IP6_NF_IPTABLES)
        else if (par->family == NFPROTO_IPV6)
                nf_defrag_ipv6_disable(par->net);
+#endif
 }

 static struct xt_match socket_mt_reg[] __read_mostly = {