1 /* SPDX-License-Identifier: GPL-2.0 */ 1
2 #ifndef _LINUX_PART_STAT_H
3 #define _LINUX_PART_STAT_H
4
5 #include <linux/blkdev.h>
6 #include <asm/local.h>
7
8 struct disk_stats {
9 u64 nsecs[NR_STAT_GROUPS];
10 unsigned long sectors[NR_STAT_GROUPS];
11 unsigned long ios[NR_STAT_GROUPS];
12 unsigned long merges[NR_STAT_GROUPS];
13 unsigned long io_ticks;
14 local_t in_flight[2];
15 };
16
17 /*
18 * Macros to operate on percpu disk statistics
19 *
20 * {disk|part|all}_stat_{add|sub|inc|dec}() mo
21 * be called between disk_stat_lock() and disk
22 *
23 * part_stat_read() can be called at any time.
24 */
25 #define part_stat_lock() preempt_disabl
26 #define part_stat_unlock() preempt_enable
27
28 #define part_stat_get_cpu(part, field, cpu)
29 (per_cpu_ptr((part)->bd_stats, (cpu))-
30
31 #define part_stat_get(part, field)
32 part_stat_get_cpu(part, field, smp_pro
33
34 #define part_stat_read(part, field)
35 ({
36 typeof((part)->bd_stats->field) res =
37 unsigned int _cpu;
38 for_each_possible_cpu(_cpu)
39 res += per_cpu_ptr((part)->bd_
40 res;
41 })
42
43 static inline void part_stat_set_all(struct bl
44 {
45 int i;
46
47 for_each_possible_cpu(i)
48 memset(per_cpu_ptr(part->bd_st
49 sizeof(struct
50 }
51
52 #define part_stat_read_accum(part, field)
53 (part_stat_read(part, field[STAT_READ]
54 part_stat_read(part, field[STAT_WRITE
55 part_stat_read(part, field[STAT_DISCA
56
57 #define __part_stat_add(part, field, addnd)
58 __this_cpu_add((part)->bd_stats->field
59
60 #define part_stat_add(part, field, addnd)
61 __part_stat_add((part), field, addnd);
62 if (bdev_is_partition(part))
63 __part_stat_add(bdev_whole(par
64 } while (0)
65
66 #define part_stat_dec(part, field)
67 part_stat_add(part, field, -1)
68 #define part_stat_inc(part, field)
69 part_stat_add(part, field, 1)
70 #define part_stat_sub(part, field, subnd)
71 part_stat_add(part, field, -subnd)
72
73 #define part_stat_local_dec(part, field)
74 local_dec(&(part_stat_get(part, field)
75 #define part_stat_local_inc(part, field)
76 local_inc(&(part_stat_get(part, field)
77 #define part_stat_local_read(part, field)
78 local_read(&(part_stat_get(part, field
79 #define part_stat_local_read_cpu(part, field,
80 local_read(&(part_stat_get_cpu(part, f
81
82 #endif /* _LINUX_PART_STAT_H */
83
Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.