[PATCH net-next,v2] netfilter: nf_conntrack_bridge: fix CONFIG_IPV6=y

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This patch fixes a few problems with CONFIG_IPV6=y and
CONFIG_NF_CONNTRACK_BRIDGE=m:

In file included from net/netfilter/utils.c:5:
include/linux/netfilter_ipv6.h: In function 'nf_ipv6_br_defrag':
include/linux/netfilter_ipv6.h:110:9: error: implicit declaration of function 'nf_ct_frag6_gather'; did you mean 'nf_ct_attach'? [-Werror=implicit-function-declaration]

And these too:

net/ipv6/netfilter.c:242:2: error: unknown field 'br_defrag' specified in initializer
net/ipv6/netfilter.c:243:2: error: unknown field 'br_fragment' specified in initializer

This patch includes an original chunk from wenxu.

Fixes: 764dd163ac92 ("netfilter: nf_conntrack_bridge: add support for IPv6")
Reported-by: Stephen Rothwell <sfr@xxxxxxxxxxxxxxxx>
Reported-by: Yuehaibing <yuehaibing@xxxxxxxxxx>
Reported-by: kbuild test robot <lkp@xxxxxxxxx>
Reported-by: wenxu <wenxu@xxxxxxxxx>
Signed-off-by: Pablo Neira Ayuso <pablo@xxxxxxxxxxxxx>
---
v2: Forgot to include "net-next" and added Reported-by to all people that have
    reported problems.

 include/linux/netfilter_ipv6.h | 2 ++
 net/ipv6/netfilter.c           | 2 +-
 2 files changed, 3 insertions(+), 1 deletion(-)

diff --git a/include/linux/netfilter_ipv6.h b/include/linux/netfilter_ipv6.h
index a21b8c9623ee..3a3dc4b1f0e7 100644
--- a/include/linux/netfilter_ipv6.h
+++ b/include/linux/netfilter_ipv6.h
@@ -96,6 +96,8 @@ static inline int nf_ip6_route(struct net *net, struct dst_entry **dst,
 #endif
 }
 
+#include <net/netfilter/ipv6/nf_defrag_ipv6.h>
+
 static inline int nf_ipv6_br_defrag(struct net *net, struct sk_buff *skb,
 				    u32 user)
 {
diff --git a/net/ipv6/netfilter.c b/net/ipv6/netfilter.c
index c6665382acb5..9530cc280953 100644
--- a/net/ipv6/netfilter.c
+++ b/net/ipv6/netfilter.c
@@ -238,7 +238,7 @@ static const struct nf_ipv6_ops ipv6ops = {
 	.route_input		= ip6_route_input,
 	.fragment		= ip6_fragment,
 	.reroute		= nf_ip6_reroute,
-#if IS_MODULE(CONFIG_NF_CONNTRACK_BRIDGE)
+#if IS_MODULE(CONFIG_IPV6)
 	.br_defrag		= nf_ct_frag6_gather,
 	.br_fragment		= br_ip6_fragment,
 #endif
-- 
2.11.0




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