[mirror_ubuntu-jammy-kernel.git] / include / linux / part_stat.h

/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _LINUX_PART_STAT_H
#define _LINUX_PART_STAT_H

#include <linux/genhd.h>

struct disk_stats {
	u64 nsecs[NR_STAT_GROUPS];
	unsigned long sectors[NR_STAT_GROUPS];
	unsigned long ios[NR_STAT_GROUPS];
	unsigned long merges[NR_STAT_GROUPS];
	unsigned long io_ticks;
	local_t in_flight[2];
};

/*
 * Macros to operate on percpu disk statistics:
 *
 * {disk|part|all}_stat_{add|sub|inc|dec}() modify the stat counters and should
 * be called between disk_stat_lock() and disk_stat_unlock().
 *
 * part_stat_read() can be called at any time.
 */
#define part_stat_lock()	preempt_disable()
#define part_stat_unlock()	preempt_enable()

#define part_stat_get_cpu(part, field, cpu)				\
	(per_cpu_ptr((part)->bd_stats, (cpu))->field)

#define part_stat_get(part, field)					\
	part_stat_get_cpu(part, field, smp_processor_id())

#define part_stat_read(part, field)					\
({									\
	typeof((part)->bd_stats->field) res = 0;			\
	unsigned int _cpu;						\
	for_each_possible_cpu(_cpu)					\
		res += per_cpu_ptr((part)->bd_stats, _cpu)->field; \
	res;								\
})

static inline void part_stat_set_all(struct block_device *part, int value)
{
	int i;

	for_each_possible_cpu(i)
		memset(per_cpu_ptr(part->bd_stats, i), value,
				sizeof(struct disk_stats));
}

#define part_stat_read_accum(part, field)				\
	(part_stat_read(part, field[STAT_READ]) +			\
	 part_stat_read(part, field[STAT_WRITE]) +			\
	 part_stat_read(part, field[STAT_DISCARD]))

#define __part_stat_add(part, field, addnd)				\
	__this_cpu_add((part)->bd_stats->field, addnd)

#define part_stat_add(part, field, addnd)	do {			\
	__part_stat_add((part), field, addnd);				\
	if ((part)->bd_partno)						\
		__part_stat_add(bdev_whole(part), field, addnd);	\
} while (0)

#define part_stat_dec(part, field)					\
	part_stat_add(part, field, -1)
#define part_stat_inc(part, field)					\
	part_stat_add(part, field, 1)
#define part_stat_sub(part, field, subnd)				\
	part_stat_add(part, field, -subnd)

#define part_stat_local_dec(part, field)				\
	local_dec(&(part_stat_get(part, field)))
#define part_stat_local_inc(part, field)				\
	local_inc(&(part_stat_get(part, field)))
#define part_stat_local_read(part, field)				\
	local_read(&(part_stat_get(part, field)))
#define part_stat_local_read_cpu(part, field, cpu)			\
	local_read(&(part_stat_get_cpu(part, field, cpu)))

#endif /* _LINUX_PART_STAT_H */
Commit	Line	Data
c6a564ff CH	1	/* SPDX-License-Identifier: GPL-2.0 */
	2	#ifndef _LINUX_PART_STAT_H
	3	#define _LINUX_PART_STAT_H
	4
	5	#include <linux/genhd.h>
	6
58d4f14f CH	7	struct disk_stats {
	8	u64 nsecs[NR_STAT_GROUPS];
	9	unsigned long sectors[NR_STAT_GROUPS];
	10	unsigned long ios[NR_STAT_GROUPS];
	11	unsigned long merges[NR_STAT_GROUPS];
	12	unsigned long io_ticks;
	13	local_t in_flight[2];
	14	};
	15
c6a564ff CH	16	/*
	17	* Macros to operate on percpu disk statistics:
	18	*
58d4f14f CH	19	* {disk\|part\|all}_stat_{add\|sub\|inc\|dec}() modify the stat counters and should
58d4f14f CH	20	* be called between disk_stat_lock() and disk_stat_unlock().
c6a564ff CH	21	*
c6a564ff CH	22	* part_stat_read() can be called at any time.
c6a564ff	23	*/
8ab1d40a KK	24	#define part_stat_lock() preempt_disable()
8ab1d40a KK	25	#define part_stat_unlock() preempt_enable()
c6a564ff CH	26
c6a564ff CH	27	#define part_stat_get_cpu(part, field, cpu) \
8446fe92	28	(per_cpu_ptr((part)->bd_stats, (cpu))->field)
c6a564ff CH	29
	30	#define part_stat_get(part, field) \
	31	part_stat_get_cpu(part, field, smp_processor_id())
	32
	33	#define part_stat_read(part, field) \
	34	({ \
8446fe92	35	typeof((part)->bd_stats->field) res = 0; \
c6a564ff CH	36	unsigned int _cpu; \
c6a564ff CH	37	for_each_possible_cpu(_cpu) \
8446fe92	38	res += per_cpu_ptr((part)->bd_stats, _cpu)->field; \
c6a564ff CH	39	res; \
	40	})
	41
8446fe92	42	static inline void part_stat_set_all(struct block_device *part, int value)
c6a564ff CH	43	{
	44	int i;
	45
	46	for_each_possible_cpu(i)
8446fe92	47	memset(per_cpu_ptr(part->bd_stats, i), value,
c6a564ff CH	48	sizeof(struct disk_stats));
	49	}
	50
c6a564ff CH	51	#define part_stat_read_accum(part, field) \
	52	(part_stat_read(part, field[STAT_READ]) + \
	53	part_stat_read(part, field[STAT_WRITE]) + \
	54	part_stat_read(part, field[STAT_DISCARD]))
	55
	56	#define __part_stat_add(part, field, addnd) \
8446fe92	57	__this_cpu_add((part)->bd_stats->field, addnd)
c6a564ff CH	58
	59	#define part_stat_add(part, field, addnd) do { \
	60	__part_stat_add((part), field, addnd); \
8446fe92 CH	61	if ((part)->bd_partno) \
8446fe92 CH	62	__part_stat_add(bdev_whole(part), field, addnd); \
c6a564ff CH	63	} while (0)
c6a564ff CH	64
15e3d2c5 CH	65	#define part_stat_dec(part, field) \
	66	part_stat_add(part, field, -1)
	67	#define part_stat_inc(part, field) \
	68	part_stat_add(part, field, 1)
	69	#define part_stat_sub(part, field, subnd) \
	70	part_stat_add(part, field, -subnd)
c6a564ff	71
15e3d2c5 CH	72	#define part_stat_local_dec(part, field) \
	73	local_dec(&(part_stat_get(part, field)))
	74	#define part_stat_local_inc(part, field) \
	75	local_inc(&(part_stat_get(part, field)))
	76	#define part_stat_local_read(part, field) \
	77	local_read(&(part_stat_get(part, field)))
	78	#define part_stat_local_read_cpu(part, field, cpu) \
	79	local_read(&(part_stat_get_cpu(part, field, cpu)))
c6a564ff CH	80
c6a564ff CH	81	#endif /* _LINUX_PART_STAT_H */