--- /dev/null
+#ifndef _TC_CORE_H_
+#define _TC_CORE_H_ 1
+
+#include <asm/types.h>
+#include <linux/pkt_sched.h>
+
+long tc_core_usec2tick(long usec);
+long tc_core_tick2usec(long tick);
+unsigned tc_calc_xmittime(unsigned rate, unsigned size);
+int tc_calc_rtable(unsigned bps, __u32 *rtab, int cell_log, unsigned mtu, unsigned mpu);
+
+int tc_setup_estimator(unsigned A, unsigned time_const, struct tc_estimator *est);
+
+int tc_core_init(void);
+
+extern struct rtnl_handle g_rth;
+extern int is_batch_mode;
+
+#endif