1. 根目录:
2. include
3. net
4. gen_stats.h

#ifndef __NET_GEN_STATS_H
#define __NET_GEN_STATS_H

#include <linux/gen_stats.h>
#include <linux/socket.h>
#include <linux/rtnetlink.h>
#include <linux/pkt_sched.h>

struct gnet_dump {
	spinlock_t *      lock;
	struct sk_buff *  skb;
	struct nlattr *   tail;

	/* Backward compatibility */
	int               compat_tc_stats;
	int               compat_xstats;
	void *            xstats;
	int               xstats_len;
	struct tc_stats   tc_stats;
};

extern int gnet_stats_start_copy(struct sk_buff *skb, int type,
				 spinlock_t *lock, struct gnet_dump *d);

extern int gnet_stats_start_copy_compat(struct sk_buff *skb, int type,
					int tc_stats_type,int xstats_type,
					spinlock_t *lock, struct gnet_dump *d);

extern int gnet_stats_copy_basic(struct gnet_dump *d,
				 struct gnet_stats_basic_packed *b);
extern int gnet_stats_copy_rate_est(struct gnet_dump *d,
				    const struct gnet_stats_basic_packed *b,
				    struct gnet_stats_rate_est *r);
extern int gnet_stats_copy_queue(struct gnet_dump *d,
				 struct gnet_stats_queue *q);
extern int gnet_stats_copy_app(struct gnet_dump *d, void *st, int len);

extern int gnet_stats_finish_copy(struct gnet_dump *d);

extern int gen_new_estimator(struct gnet_stats_basic_packed *bstats,
			     struct gnet_stats_rate_est *rate_est,
			     spinlock_t *stats_lock, struct nlattr *opt);
extern void gen_kill_estimator(struct gnet_stats_basic_packed *bstats,
			       struct gnet_stats_rate_est *rate_est);
extern int gen_replace_estimator(struct gnet_stats_basic_packed *bstats,
				 struct gnet_stats_rate_est *rate_est,
				 spinlock_t *stats_lock, struct nlattr *opt);
extern bool gen_estimator_active(const struct gnet_stats_basic_packed *bstats,
				 const struct gnet_stats_rate_est *rate_est);
#endif