4 #include <linux/types.h>
5 #include <linux/mutex.h>
6 #include <linux/list.h>
8 int dm_statistics_init(void);
9 void dm_statistics_exit(void);
13 struct list_head list; /* list of struct dm_stat */
14 struct dm_stats_last_position __percpu *last;
23 void dm_stats_init(struct dm_stats *st);
24 void dm_stats_cleanup(struct dm_stats *st);
28 int dm_stats_message(struct mapped_device *md, unsigned argc, char **argv,
29 char *result, unsigned maxlen);
31 void dm_stats_account_io(struct dm_stats *stats, unsigned long bi_rw,
32 sector_t bi_sector, unsigned bi_sectors, bool end,
33 unsigned long duration, struct dm_stats_aux *aux);
35 static inline bool dm_stats_used(struct dm_stats *st)
37 return !list_empty(&st->list);