netfilter: nf_tables: merge ipv4 and ipv6 nat chain types

Merge the ipv4 and ipv6 nat chain type. This is the last
missing piece which allows to provide inet family support
for nat in a follow patch.

The kconfig knobs for ipv4/ipv6 nat chain are removed, the
nat chain type will be built unconditionally if NFT_NAT
expression is enabled.

Before:
   text	   data	    bss	    dec	    hex	filename
   1576     896       0    2472     9a8 nft_chain_nat_ipv4.ko
   1697     896       0    2593     a21 nft_chain_nat_ipv6.ko

After:
   text	   data	    bss	    dec	    hex	filename
   1832     896       0    2728     aa8 nft_chain_nat.ko

Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>

1 files changed, 0 insertions, 85 deletions

diff --git a/net/ipv4/netfilter/nft_chain_nat_ipv4.c b/net/ipv4/netfilter/nft_chain_nat_ipv4.c
deleted file mode 100644
index 0d1ad5901aff..000000000000
--- a/net/ipv4/netfilter/nft_chain_nat_ipv4.c
+++ /dev/null
@@ -1,85 +0,0 @@
-/*
- * Copyright (c) 2008-2009 Patrick McHardy <kaber@trash.net>
- * Copyright (c) 2012 Pablo Neira Ayuso <pablo@netfilter.org>
- * Copyright (c) 2012 Intel Corporation
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- *
- * Development of this code funded by Astaro AG (http://www.astaro.com/)
- */
-
-#include <linux/module.h>
-#include <linux/init.h>
-#include <linux/list.h>
-#include <linux/skbuff.h>
-#include <linux/ip.h>
-#include <linux/netfilter.h>
-#include <linux/netfilter_ipv4.h>
-#include <linux/netfilter/nf_tables.h>
-#include <net/netfilter/nf_conntrack.h>
-#include <net/netfilter/nf_nat.h>
-#include <net/netfilter/nf_tables.h>
-#include <net/netfilter/nf_tables_ipv4.h>
-#include <net/ip.h>
-
-static unsigned int nft_nat_do_chain(void *priv,
-				     struct sk_buff *skb,
-				     const struct nf_hook_state *state)
-{
-	struct nft_pktinfo pkt;
-
-	nft_set_pktinfo(&pkt, skb, state);
-	nft_set_pktinfo_ipv4(&pkt, skb);
-
-	return nft_do_chain(&pkt, priv);
-}
-
-static int nft_nat_ipv4_reg(struct net *net, const struct nf_hook_ops *ops)
-{
-	return nf_nat_ipv4_register_fn(net, ops);
-}
-
-static void nft_nat_ipv4_unreg(struct net *net, const struct nf_hook_ops *ops)
-{
-	nf_nat_ipv4_unregister_fn(net, ops);
-}
-
-static const struct nft_chain_type nft_chain_nat_ipv4 = {
-	.name		= "nat",
-	.type		= NFT_CHAIN_T_NAT,
-	.family		= NFPROTO_IPV4,
-	.owner		= THIS_MODULE,
-	.hook_mask	= (1 << NF_INET_PRE_ROUTING) |
-			  (1 << NF_INET_POST_ROUTING) |
-			  (1 << NF_INET_LOCAL_OUT) |
-			  (1 << NF_INET_LOCAL_IN),
-	.hooks		= {
-		[NF_INET_PRE_ROUTING]	= nft_nat_do_chain,
-		[NF_INET_POST_ROUTING]	= nft_nat_do_chain,
-		[NF_INET_LOCAL_OUT]	= nft_nat_do_chain,
-		[NF_INET_LOCAL_IN]	= nft_nat_do_chain,
-	},
-	.ops_register = nft_nat_ipv4_reg,
-	.ops_unregister = nft_nat_ipv4_unreg,
-};
-
-static int __init nft_chain_nat_init(void)
-{
-	nft_register_chain_type(&nft_chain_nat_ipv4);
-
-	return 0;
-}
-
-static void __exit nft_chain_nat_exit(void)
-{
-	nft_unregister_chain_type(&nft_chain_nat_ipv4);
-}
-
-module_init(nft_chain_nat_init);
-module_exit(nft_chain_nat_exit);
-
-MODULE_LICENSE("GPL");
-MODULE_AUTHOR("Patrick McHardy <kaber@trash.net>");
-MODULE_ALIAS_NFT_CHAIN(AF_INET, "nat");