[NETFILTER]: Clean up table initialization

- move arp_tables initial table structure definitions to arp_tables.h
  similar to ip_tables and ip6_tables

- use C99 initializers

- use initializer macros where possible

Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>

include/linux/netfilter/x_tables.h

@@ -54,6 +54,14 @@ struct xt_entry_target
 	unsigned char data[0];
 };
 
+#define XT_TARGET_INIT(__name, __size)					       \
+{									       \
+	.target.u.user = {						       \
+		.target_size	= XT_ALIGN(__size),			       \
+		.name		= __name,				       \
+	},								       \
+}
+
 struct xt_standard_target
 {
 	struct xt_entry_target target;

include/linux/netfilter_arp/arp_tables.h

@@ -238,6 +238,47 @@ static __inline__ struct arpt_entry_target *arpt_get_target(struct arpt_entry *e
  */
 #ifdef __KERNEL__
 
+/* Standard entry. */
+struct arpt_standard
+{
+	struct arpt_entry entry;
+	struct arpt_standard_target target;
+};
+
+struct arpt_error_target
+{
+	struct arpt_entry_target target;
+	char errorname[ARPT_FUNCTION_MAXNAMELEN];
+};
+
+struct arpt_error
+{
+	struct arpt_entry entry;
+	struct arpt_error_target target;
+};
+
+#define ARPT_ENTRY_INIT(__size)						       \
+{									       \
+	.target_offset	= sizeof(struct arpt_entry),			       \
+	.next_offset	= (__size),					       \
+}
+
+#define ARPT_STANDARD_INIT(__verdict)					       \
+{									       \
+	.entry		= ARPT_ENTRY_INIT(sizeof(struct arpt_standard)),       \
+	.target		= XT_TARGET_INIT(ARPT_STANDARD_TARGET,		       \
+					 sizeof(struct arpt_standard_target)), \
+	.target.verdict	= -(__verdict) - 1,				       \
+}
+
+#define ARPT_ERROR_INIT							       \
+{									       \
+	.entry		= ARPT_ENTRY_INIT(sizeof(struct arpt_error)),	       \
+	.target		= XT_TARGET_INIT(ARPT_ERROR_TARGET,		       \
+					 sizeof(struct arpt_error_target)),    \
+	.target.errorname = "ERROR",					       \
+}
+
 #define arpt_register_target(tgt) 	\
 ({	(tgt)->family = NF_ARP;		\
  	xt_register_target(tgt); })

include/linux/netfilter_ipv4/ip_tables.h

@@ -295,6 +295,28 @@ struct ipt_error
 	struct ipt_error_target target;
 };
 
+#define IPT_ENTRY_INIT(__size)						       \
+{									       \
+	.target_offset	= sizeof(struct ipt_entry),			       \
+	.next_offset	= (__size),					       \
+}
+
+#define IPT_STANDARD_INIT(__verdict)					       \
+{									       \
+	.entry		= IPT_ENTRY_INIT(sizeof(struct ipt_standard)),	       \
+	.target		= XT_TARGET_INIT(IPT_STANDARD_TARGET,		       \
+					 sizeof(struct xt_standard_target)),   \
+	.target.verdict	= -(__verdict) - 1,				       \
+}
+
+#define IPT_ERROR_INIT							       \
+{									       \
+	.entry		= IPT_ENTRY_INIT(sizeof(struct ipt_error)),	       \
+	.target		= XT_TARGET_INIT(IPT_ERROR_TARGET,		       \
+					 sizeof(struct ipt_error_target)),     \
+	.target.errorname = "ERROR",					       \
+}
+
 extern unsigned int ipt_do_table(struct sk_buff **pskb,
 				 unsigned int hook,
 				 const struct net_device *in,

include/linux/netfilter_ipv6/ip6_tables.h

@@ -123,6 +123,28 @@ struct ip6t_error
 	struct ip6t_error_target target;
 };
 
+#define IP6T_ENTRY_INIT(__size)						       \
+{									       \
+	.target_offset	= sizeof(struct ip6t_entry),			       \
+	.next_offset	= (__size),					       \
+}
+
+#define IP6T_STANDARD_INIT(__verdict)					       \
+{									       \
+	.entry		= IP6T_ENTRY_INIT(sizeof(struct ip6t_standard)),       \
+	.target		= XT_TARGET_INIT(IP6T_STANDARD_TARGET,		       \
+					 sizeof(struct ip6t_standard_target)), \
+	.target.verdict	= -(__verdict) - 1,				       \
+}
+
+#define IP6T_ERROR_INIT							       \
+{									       \
+	.entry		= IP6T_ENTRY_INIT(sizeof(struct ip6t_error)),	       \
+	.target		= XT_TARGET_INIT(IP6T_ERROR_TARGET,		       \
+					 sizeof(struct ip6t_error_target)),    \
+	.target.errorname = "ERROR",					       \
+}
+
 /*
  * New IP firewall options for [gs]etsockopt at the RAW IP level.
  * Unlike BSD Linux inherits IP options so you don't have to use