// 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 */ int (*stat_cmp)(void *p1, void *p2); /* 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 */