[linux.git] / kernel / trace / trace_stat.h

// SPDX-License-Identifier: GPL-2.0
#ifndef __TRACE_STAT_H
#define __TRACE_STAT_H

#include <linux/seq_file.h>

/*
 * If you want to provide a stat file (one-shot statistics), fill
 * an iterator with stat_start/stat_next and a stat_show callbacks.
 * The others callbacks are optional.
 */
struct tracer_stat {
	/* The name of your stat file */
	const char		*name;
	/* Iteration over statistic entries */
	void			*(*stat_start)(struct tracer_stat *trace);
	void			*(*stat_next)(void *prev, int idx);
	/* Compare two entries for stats sorting */
	cmp_func_t		stat_cmp;
	/* Print a stat entry */
	int			(*stat_show)(struct seq_file *s, void *p);
	/* Release an entry */
	void			(*stat_release)(void *stat);
	/* Print the headers of your stat entries */
	int			(*stat_headers)(struct seq_file *s);
};

/*
 * Destroy or create a stat file
 */
extern int register_stat_tracer(struct tracer_stat *trace);
extern void unregister_stat_tracer(struct tracer_stat *trace);

#endif /* __TRACE_STAT_H */
Commit	Line	Data
bb730b58	1	// SPDX-License-Identifier: GPL-2.0
002bb86d FW	2	#ifndef __TRACE_STAT_H
	3	#define __TRACE_STAT_H
	4
	5	#include <linux/seq_file.h>
	6
	7	/*
	8	* If you want to provide a stat file (one-shot statistics), fill
	9	* an iterator with stat_start/stat_next and a stat_show callbacks.
	10	* The others callbacks are optional.
	11	*/
	12	struct tracer_stat {
	13	/* The name of your stat file */
	14	const char *name;
	15	/* Iteration over statistic entries */
42548008	16	void (stat_start)(struct tracer_stat *trace);
002bb86d FW	17	void (stat_next)(void *prev, int idx);
002bb86d FW	18	/* Compare two entries for stats sorting */
80042c8f	19	cmp_func_t stat_cmp;
002bb86d FW	20	/* Print a stat entry */
002bb86d FW	21	int (stat_show)(struct seq_file s, void *p);
d8ea37d5 LJ	22	/* Release an entry */
d8ea37d5 LJ	23	void (stat_release)(void stat);
002bb86d FW	24	/* Print the headers of your stat entries */
	25	int (stat_headers)(struct seq_file s);
	26	};
	27
	28	/*
	29	* Destroy or create a stat file
	30	*/
	31	extern int register_stat_tracer(struct tracer_stat *trace);
	32	extern void unregister_stat_tracer(struct tracer_stat *trace);
	33
	34	#endif /* __TRACE_STAT_H */