diff options
Diffstat (limited to 'block/blk-stat.h')
| -rw-r--r-- | block/blk-stat.h | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/block/blk-stat.h b/block/blk-stat.h new file mode 100644 index 000000000..376a6ccd9 --- /dev/null +++ b/block/blk-stat.h @@ -0,0 +1,18 @@ +#ifndef BLK_STAT_H +#define BLK_STAT_H + +/* + * ~0.13s window as a power-of-2 (2^27 nsecs) + */ +#define BLK_STAT_NSEC 134217728ULL +#define BLK_STAT_MASK ~(BLK_STAT_NSEC - 1) + +void blk_stat_add(struct blk_rq_stat *, struct request *); +void blk_hctx_stat_get(struct blk_mq_hw_ctx *, struct blk_rq_stat *); +void blk_queue_stat_get(struct request_queue *, struct blk_rq_stat *); +void blk_stat_clear(struct request_queue *q); +void blk_stat_init(struct blk_rq_stat *); +void blk_stat_sum(struct blk_rq_stat *, struct blk_rq_stat *); +bool blk_stat_is_current(struct blk_rq_stat *); + +#endif |