+#ifdef CONFIG_COMPAT
+#include <net/compat.h>
+
+struct compat_xt_entry_match
+{
+ union {
+ struct {
+ u_int16_t match_size;
+ char name[XT_FUNCTION_MAXNAMELEN - 1];
+ u_int8_t revision;
+ } user;
+ struct {
+ u_int16_t match_size;
+ compat_uptr_t match;
+ } kernel;
+ u_int16_t match_size;
+ } u;
+ unsigned char data[0];
+};
+
+struct compat_xt_entry_target
+{
+ union {
+ struct {
+ u_int16_t target_size;
+ char name[XT_FUNCTION_MAXNAMELEN - 1];
+ u_int8_t revision;
+ } user;
+ struct {
+ u_int16_t target_size;
+ compat_uptr_t target;
+ } kernel;
+ u_int16_t target_size;
+ } u;
+ unsigned char data[0];
+};
+
+/* FIXME: this works only on 32 bit tasks
+ * need to change whole approach in order to calculate align as function of
+ * current task alignment */
+
+struct compat_xt_counters
+{
+#if defined(CONFIG_X86_64) || defined(CONFIG_IA64)
+ u_int32_t cnt[4];
+#else
+ u_int64_t cnt[2];
+#endif
+};
+
+struct compat_xt_counters_info
+{
+ char name[XT_TABLE_MAXNAMELEN];
+ compat_uint_t num_counters;
+ struct compat_xt_counters counters[0];
+};
+
+#define COMPAT_XT_ALIGN(s) (((s) + (__alignof__(struct compat_xt_counters)-1)) \
+ & ~(__alignof__(struct compat_xt_counters)-1))
+
+extern void xt_compat_lock(int af);
+extern void xt_compat_unlock(int af);
+
+extern int xt_compat_add_offset(int af, unsigned int offset, short delta);
+extern void xt_compat_flush_offsets(int af);
+extern short xt_compat_calc_jump(int af, unsigned int offset);
+
+extern int xt_compat_match_offset(struct xt_match *match);
+extern int xt_compat_match_from_user(struct xt_entry_match *m,
+ void **dstptr, int *size);
+extern int xt_compat_match_to_user(struct xt_entry_match *m,
+ void __user **dstptr, int *size);
+
+extern int xt_compat_target_offset(struct xt_target *target);
+extern void xt_compat_target_from_user(struct xt_entry_target *t,
+ void **dstptr, int *size);
+extern int xt_compat_target_to_user(struct xt_entry_target *t,
+ void __user **dstptr, int *size);
+
+#endif /* CONFIG_COMPAT */