| Kyle Swenson | 8d8f654 | 2021-03-15 11:02:55 -0600 | [diff] [blame] | 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 | */ |
| 11 | struct 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 | */ |
| 30 | extern int register_stat_tracer(struct tracer_stat *trace); |
| 31 | extern void unregister_stat_tracer(struct tracer_stat *trace); |
| 32 | |
| 33 | #endif /* __TRACE_STAT_H */ |