netfilter: flowtable: remove ipv4/ipv6 modules

Just place the structs and registration in the inet module.
nf_flow_table_ipv6, nf_flow_table_ipv4 and nf_flow_table_inet share
same module dependencies: nf_flow_table, nf_tables.

before:
   text	   data	    bss	    dec	    hex	filename
   2278	   1480	      0	   3758	    eae	nf_flow_table_inet.ko
   1159	   1352	      0	   2511	    9cf	nf_flow_table_ipv6.ko
   1154	   1352	      0	   2506	    9ca	nf_flow_table_ipv4.ko

after:
   2369	   1672	      0	   4041	    fc9	nf_flow_table_inet.ko
Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>

net/ipv4/netfilter/Kconfig

@@ -59,12 +59,8 @@ config NF_TABLES_ARP
 endif # NF_TABLES
 
 config NF_FLOW_TABLE_IPV4
-	tristate "Netfilter flow table IPv4 module"
-	depends on NF_FLOW_TABLE
-	help
-	  This option adds the flow table IPv4 support.
-
-	  To compile it as a module, choose M here.
+	tristate
+	select NF_FLOW_TABLE_INET
 
 config NF_DUP_IPV4
 	tristate "Netfilter IPv4 packet duplication to alternate destination"

net/ipv4/netfilter/Makefile

@@ -24,9 +24,6 @@ obj-$(CONFIG_NFT_REJECT_IPV4) += nft_reject_ipv4.o
 obj-$(CONFIG_NFT_FIB_IPV4) += nft_fib_ipv4.o
 obj-$(CONFIG_NFT_DUP_IPV4) += nft_dup_ipv4.o
 
-# flow table support
-obj-$(CONFIG_NF_FLOW_TABLE_IPV4) += nf_flow_table_ipv4.o
-
 # generic IP tables
 obj-$(CONFIG_IP_NF_IPTABLES) += ip_tables.o
 

net/ipv4/netfilter/nf_flow_table_ipv4.c

-// SPDX-License-Identifier: GPL-2.0-only
-#include <linux/kernel.h>
-#include <linux/init.h>
-#include <linux/module.h>
-#include <linux/netfilter.h>
-#include <net/netfilter/nf_flow_table.h>
-#include <net/netfilter/nf_tables.h>
-
-static struct nf_flowtable_type flowtable_ipv4 = {
-	.family		= NFPROTO_IPV4,
-	.init		= nf_flow_table_init,
-	.setup		= nf_flow_table_offload_setup,
-	.action		= nf_flow_rule_route_ipv4,
-	.free		= nf_flow_table_free,
-	.hook		= nf_flow_offload_ip_hook,
-	.owner		= THIS_MODULE,
-};
-
-static int __init nf_flow_ipv4_module_init(void)
-{
-	nft_register_flowtable_type(&flowtable_ipv4);
-
-	return 0;
-}
-
-static void __exit nf_flow_ipv4_module_exit(void)
-{
-	nft_unregister_flowtable_type(&flowtable_ipv4);
-}
-
-module_init(nf_flow_ipv4_module_init);
-module_exit(nf_flow_ipv4_module_exit);
-
-MODULE_LICENSE("GPL");
-MODULE_AUTHOR("Pablo Neira Ayuso <pablo@netfilter.org>");
-MODULE_ALIAS_NF_FLOWTABLE(AF_INET);
-MODULE_DESCRIPTION("Netfilter flow table support");

net/ipv6/netfilter/Kconfig

@@ -48,12 +48,8 @@ endif # NF_TABLES_IPV6
 endif # NF_TABLES
 
 config NF_FLOW_TABLE_IPV6
-	tristate "Netfilter flow table IPv6 module"
-	depends on NF_FLOW_TABLE
-	help
-	  This option adds the flow table IPv6 support.
-
-	  To compile it as a module, choose M here.
+	tristate
+	select NF_FLOW_TABLE_INET
 
 config NF_DUP_IPV6
 	tristate "Netfilter IPv6 packet duplication to alternate destination"

net/ipv6/netfilter/nf_flow_table_ipv6.c

-// SPDX-License-Identifier: GPL-2.0-only
-#include <linux/kernel.h>
-#include <linux/init.h>
-#include <linux/module.h>
-#include <linux/netfilter.h>
-#include <linux/rhashtable.h>
-#include <net/netfilter/nf_flow_table.h>
-#include <net/netfilter/nf_tables.h>
-
-static struct nf_flowtable_type flowtable_ipv6 = {
-	.family		= NFPROTO_IPV6,
-	.init		= nf_flow_table_init,
-	.setup		= nf_flow_table_offload_setup,
-	.action		= nf_flow_rule_route_ipv6,
-	.free		= nf_flow_table_free,
-	.hook		= nf_flow_offload_ipv6_hook,
-	.owner		= THIS_MODULE,
-};
-
-static int __init nf_flow_ipv6_module_init(void)
-{
-	nft_register_flowtable_type(&flowtable_ipv6);
-
-	return 0;
-}
-
-static void __exit nf_flow_ipv6_module_exit(void)
-{
-	nft_unregister_flowtable_type(&flowtable_ipv6);
-}
-
-module_init(nf_flow_ipv6_module_init);
-module_exit(nf_flow_ipv6_module_exit);
-
-MODULE_LICENSE("GPL");
-MODULE_AUTHOR("Pablo Neira Ayuso <pablo@netfilter.org>");
-MODULE_ALIAS_NF_FLOWTABLE(AF_INET6);
-MODULE_DESCRIPTION("Netfilter flow table IPv6 module");

net/netfilter/nf_flow_table_inet.c

@@ -54,8 +54,30 @@ static struct nf_flowtable_type flowtable_inet = {
 	.owner		= THIS_MODULE,
 };
 
+static struct nf_flowtable_type flowtable_ipv4 = {
+	.family		= NFPROTO_IPV4,
+	.init		= nf_flow_table_init,
+	.setup		= nf_flow_table_offload_setup,
+	.action		= nf_flow_rule_route_ipv4,
+	.free		= nf_flow_table_free,
+	.hook		= nf_flow_offload_ip_hook,
+	.owner		= THIS_MODULE,
+};
+
+static struct nf_flowtable_type flowtable_ipv6 = {
+	.family		= NFPROTO_IPV6,
+	.init		= nf_flow_table_init,
+	.setup		= nf_flow_table_offload_setup,
+	.action		= nf_flow_rule_route_ipv6,
+	.free		= nf_flow_table_free,
+	.hook		= nf_flow_offload_ipv6_hook,
+	.owner		= THIS_MODULE,
+};
+
 static int __init nf_flow_inet_module_init(void)
 {
+	nft_register_flowtable_type(&flowtable_ipv4);
+	nft_register_flowtable_type(&flowtable_ipv6);
 	nft_register_flowtable_type(&flowtable_inet);
 
 	return 0;
@@ -64,6 +86,8 @@ static int __init nf_flow_inet_module_init(void)
 static void __exit nf_flow_inet_module_exit(void)
 {
 	nft_unregister_flowtable_type(&flowtable_inet);
+	nft_unregister_flowtable_type(&flowtable_ipv6);
+	nft_unregister_flowtable_type(&flowtable_ipv4);
 }
 
 module_init(nf_flow_inet_module_init);
@@ -71,5 +95,7 @@ module_exit(nf_flow_inet_module_exit);
 
 MODULE_LICENSE("GPL");
 MODULE_AUTHOR("Pablo Neira Ayuso <pablo@netfilter.org>");
+MODULE_ALIAS_NF_FLOWTABLE(AF_INET);
+MODULE_ALIAS_NF_FLOWTABLE(AF_INET6);
 MODULE_ALIAS_NF_FLOWTABLE(1); /* NFPROTO_INET */
 MODULE_DESCRIPTION("Netfilter flow table mixed IPv4/IPv6 module");