[PATCH 2/4] netfilter: avoid build error if TPROXY/SOCKET=y && NF_DEFRAG_IPV6=m

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From: Florian Westphal <fw@xxxxxxxxx>

With TPROXY=y but DEFRAG_IPV6=m we get build failure:

net/built-in.o: In function `tproxy_tg_init':
net/netfilter/xt_TPROXY.c:588: undefined reference to `nf_defrag_ipv6_enable'

If DEFRAG_IPV6 is modular, TPROXY must be too.
(or both must be builtin).

This enforces =m for both.

Reported-and-tested-by: Liu Hua <liusdu@xxxxxxx>
Signed-off-by: Florian Westphal <fw@xxxxxxxxx>
Signed-off-by: Pablo Neira Ayuso <pablo@xxxxxxxxxxxxx>
---
 net/netfilter/Kconfig |    2 ++
 1 file changed, 2 insertions(+)

diff --git a/net/netfilter/Kconfig b/net/netfilter/Kconfig
index f70e34a..a0f3e6a3 100644
--- a/net/netfilter/Kconfig
+++ b/net/netfilter/Kconfig
@@ -863,6 +863,7 @@ config NETFILTER_XT_TARGET_TPROXY
 	depends on NETFILTER_XTABLES
 	depends on NETFILTER_ADVANCED
 	depends on (IPV6 || IPV6=n)
+	depends on (IP6_NF_IPTABLES || IP6_NF_IPTABLES=n)
 	depends on IP_NF_MANGLE
 	select NF_DEFRAG_IPV4
 	select NF_DEFRAG_IPV6 if IP6_NF_IPTABLES
@@ -1356,6 +1357,7 @@ config NETFILTER_XT_MATCH_SOCKET
 	depends on NETFILTER_ADVANCED
 	depends on !NF_CONNTRACK || NF_CONNTRACK
 	depends on (IPV6 || IPV6=n)
+	depends on (IP6_NF_IPTABLES || IP6_NF_IPTABLES=n)
 	select NF_DEFRAG_IPV4
 	select NF_DEFRAG_IPV6 if IP6_NF_IPTABLES
 	help
-- 
1.7.10.4

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