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Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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12345678910111213141516171819202122232425262728293031323334353637383940414243444546474849505152535455565758596061626364656667686970717273747576777879808182838485/* SPDX-License-Identifier: GPL-2.0 */#ifndef _LINUX_PART_STAT_H#define _LINUX_PART_STAT_H
#include <linux/blkdev.h>#include <asm/local.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: * * part_stat_{add|sub|inc|dec}() modify the stat counters and should * be called between part_stat_lock() and part_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_UNQUAL((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 (bdev_is_partition(part)) \ __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)))
unsigned int bdev_count_inflight(struct block_device *part);
#endif /* _LINUX_PART_STAT_H */