1// SPDX-License-Identifier: GPL-2.0
 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 */
12struct tracer_stat {
13	/* The name of your stat file */
14	const char		*name;
15	/* Iteration over statistic entries */
16	void			*(*stat_start)(struct tracer_stat *trace);
17	void			*(*stat_next)(void *prev, int idx);
18	/* Compare two entries for stats sorting */
19	cmp_func_t		stat_cmp;
20	/* Print a stat entry */
21	int			(*stat_show)(struct seq_file *s, void *p);
22	/* Release an entry */
23	void			(*stat_release)(void *stat);
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 */
31extern int register_stat_tracer(struct tracer_stat *trace);
32extern void unregister_stat_tracer(struct tracer_stat *trace);
33
34#endif /* __TRACE_STAT_H */

 
 1#ifndef __TRACE_STAT_H
 2#define __TRACE_STAT_H
 3
 4#include <linux/seq_file.h>
 5
 6/*
 7 * If you want to provide a stat file (one-shot statistics), fill
 8 * an iterator with stat_start/stat_next and a stat_show callbacks.
 9 * The others callbacks are optional.
10 */
11struct tracer_stat {
12	/* The name of your stat file */
13	const char		*name;
14	/* Iteration over statistic entries */
15	void			*(*stat_start)(struct tracer_stat *trace);
16	void			*(*stat_next)(void *prev, int idx);
17	/* Compare two entries for stats sorting */
18	int			(*stat_cmp)(void *p1, void *p2);
19	/* Print a stat entry */
20	int			(*stat_show)(struct seq_file *s, void *p);
21	/* Release an entry */
22	void			(*stat_release)(void *stat);
23	/* Print the headers of your stat entries */
24	int			(*stat_headers)(struct seq_file *s);
25};
26
27/*
28 * Destroy or create a stat file
29 */
30extern int register_stat_tracer(struct tracer_stat *trace);
31extern void unregister_stat_tracer(struct tracer_stat *trace);
32
33#endif /* __TRACE_STAT_H */