Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  1) /* SPDX-License-Identifier: GPL-2.0 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  2) #ifndef DM_STATS_H
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  3) #define DM_STATS_H
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  4) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  5) #include <linux/types.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  6) #include <linux/mutex.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  7) #include <linux/list.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  8) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  9) int dm_statistics_init(void);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) void dm_statistics_exit(void);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) struct dm_stats {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) 	struct mutex mutex;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) 	struct list_head list;	/* list of struct dm_stat */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) 	struct dm_stats_last_position __percpu *last;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) 	sector_t last_sector;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) 	unsigned last_rw;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) struct dm_stats_aux {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) 	bool merged;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) 	unsigned long long duration_ns;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) void dm_stats_init(struct dm_stats *st);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) void dm_stats_cleanup(struct dm_stats *st);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) struct mapped_device;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) int dm_stats_message(struct mapped_device *md, unsigned argc, char **argv,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) 		     char *result, unsigned maxlen);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) void dm_stats_account_io(struct dm_stats *stats, unsigned long bi_rw,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) 			 sector_t bi_sector, unsigned bi_sectors, bool end,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) 			 unsigned long duration_jiffies,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) 			 struct dm_stats_aux *aux);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) static inline bool dm_stats_used(struct dm_stats *st)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) 	return !list_empty(&st->list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) #endif