forked from Qortal/Brooklyn
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
43 lines
988 B
43 lines
988 B
/* SPDX-License-Identifier: GPL-2.0 */ |
|
#ifndef DM_STATS_H |
|
#define DM_STATS_H |
|
|
|
#include <linux/types.h> |
|
#include <linux/mutex.h> |
|
#include <linux/list.h> |
|
|
|
int dm_statistics_init(void); |
|
void dm_statistics_exit(void); |
|
|
|
struct dm_stats { |
|
struct mutex mutex; |
|
struct list_head list; /* list of struct dm_stat */ |
|
struct dm_stats_last_position __percpu *last; |
|
sector_t last_sector; |
|
unsigned last_rw; |
|
}; |
|
|
|
struct dm_stats_aux { |
|
bool merged; |
|
unsigned long long duration_ns; |
|
}; |
|
|
|
void dm_stats_init(struct dm_stats *st); |
|
void dm_stats_cleanup(struct dm_stats *st); |
|
|
|
struct mapped_device; |
|
|
|
int dm_stats_message(struct mapped_device *md, unsigned argc, char **argv, |
|
char *result, unsigned maxlen); |
|
|
|
void dm_stats_account_io(struct dm_stats *stats, unsigned long bi_rw, |
|
sector_t bi_sector, unsigned bi_sectors, bool end, |
|
unsigned long duration_jiffies, |
|
struct dm_stats_aux *aux); |
|
|
|
static inline bool dm_stats_used(struct dm_stats *st) |
|
{ |
|
return !list_empty(&st->list); |
|
} |
|
|
|
#endif
|
|
|