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