linux/include/trace/events/skb.h

#undef TRACE_SYSTEM
#define TRACE_SYSTEM skb

#if !defined(_TRACE_SKB_H) || defined(TRACE_HEADER_MULTI_READ)
#define _TRACE_SKB_H

#include <linux/skbuff.h>
#include <linux/tracepoint.h>

/*
 * Tracepoint for free an sk_buff:
 */
TRACE_EVENT(kfree_skb,

	TP_PROTO(struct sk_buff *skb, void *location),

	TP_ARGS(skb, location),

	TP_STRUCT__entry(
		__field(	void *,		skbaddr		)
		__field(	unsigned short,	protocol	)
		__field(	void *,		location	)
	),

	TP_fast_assign(
		__entry->skbaddr = skb;
		if (skb) {
			__entry->protocol = ntohs(skb->protocol);
		}
		__entry->location = location;
	),

	TP_printk("skbaddr=%p protocol=%u location=%p",
		__entry->skbaddr, __entry->protocol, __entry->location)
);

#endif /* _TRACE_SKB_H */

/* This part must be outside protection */
#include <trace/define_trace.h>