1 /* SPDX-License-Identifier: GPL-2.0 */
2 /*
3 * Task I/O accounting operations
4 */
5 #ifndef __TASK_IO_ACCOUNTING_OPS_INCLUDED
6 #define __TASK_IO_ACCOUNTING_OPS_INCLUDED
7
8 #include <linux/sched.h>
9
10 #ifdef CONFIG_TASK_IO_ACCOUNTING
task_io_account_read(size_t bytes)11 static inline void task_io_account_read(size_t bytes)
12 {
13 current->ioac.read_bytes += bytes;
14 }
15
16 /*
17 * We approximate number of blocks, because we account bytes only.
18 * A 'block' is 512 bytes
19 */
task_io_get_inblock(const struct task_struct * p)20 static inline unsigned long task_io_get_inblock(const struct task_struct *p)
21 {
22 return p->ioac.read_bytes >> 9;
23 }
24
task_io_account_write(size_t bytes)25 static inline void task_io_account_write(size_t bytes)
26 {
27 current->ioac.write_bytes += bytes;
28 }
29
30 /*
31 * We approximate number of blocks, because we account bytes only.
32 * A 'block' is 512 bytes
33 */
task_io_get_oublock(const struct task_struct * p)34 static inline unsigned long task_io_get_oublock(const struct task_struct *p)
35 {
36 return p->ioac.write_bytes >> 9;
37 }
38
task_io_account_cancelled_write(size_t bytes)39 static inline void task_io_account_cancelled_write(size_t bytes)
40 {
41 current->ioac.cancelled_write_bytes += bytes;
42 }
43
task_io_accounting_init(struct task_io_accounting * ioac)44 static inline void task_io_accounting_init(struct task_io_accounting *ioac)
45 {
46 memset(ioac, 0, sizeof(*ioac));
47 }
48
task_blk_io_accounting_add(struct task_io_accounting * dst,struct task_io_accounting * src)49 static inline void task_blk_io_accounting_add(struct task_io_accounting *dst,
50 struct task_io_accounting *src)
51 {
52 dst->read_bytes += src->read_bytes;
53 dst->write_bytes += src->write_bytes;
54 dst->cancelled_write_bytes += src->cancelled_write_bytes;
55 }
56
57 #else
58
task_io_account_read(size_t bytes)59 static inline void task_io_account_read(size_t bytes)
60 {
61 }
62
task_io_get_inblock(const struct task_struct * p)63 static inline unsigned long task_io_get_inblock(const struct task_struct *p)
64 {
65 return 0;
66 }
67
task_io_account_write(size_t bytes)68 static inline void task_io_account_write(size_t bytes)
69 {
70 }
71
task_io_get_oublock(const struct task_struct * p)72 static inline unsigned long task_io_get_oublock(const struct task_struct *p)
73 {
74 return 0;
75 }
76
task_io_account_cancelled_write(size_t bytes)77 static inline void task_io_account_cancelled_write(size_t bytes)
78 {
79 }
80
task_io_accounting_init(struct task_io_accounting * ioac)81 static inline void task_io_accounting_init(struct task_io_accounting *ioac)
82 {
83 }
84
task_blk_io_accounting_add(struct task_io_accounting * dst,struct task_io_accounting * src)85 static inline void task_blk_io_accounting_add(struct task_io_accounting *dst,
86 struct task_io_accounting *src)
87 {
88 }
89
90 #endif /* CONFIG_TASK_IO_ACCOUNTING */
91
92 #ifdef CONFIG_TASK_XACCT
task_chr_io_accounting_add(struct task_io_accounting * dst,struct task_io_accounting * src)93 static inline void task_chr_io_accounting_add(struct task_io_accounting *dst,
94 struct task_io_accounting *src)
95 {
96 dst->rchar += src->rchar;
97 dst->wchar += src->wchar;
98 dst->syscr += src->syscr;
99 dst->syscw += src->syscw;
100 }
101 #else
task_chr_io_accounting_add(struct task_io_accounting * dst,struct task_io_accounting * src)102 static inline void task_chr_io_accounting_add(struct task_io_accounting *dst,
103 struct task_io_accounting *src)
104 {
105 }
106 #endif /* CONFIG_TASK_XACCT */
107
task_io_accounting_add(struct task_io_accounting * dst,struct task_io_accounting * src)108 static inline void task_io_accounting_add(struct task_io_accounting *dst,
109 struct task_io_accounting *src)
110 {
111 task_chr_io_accounting_add(dst, src);
112 task_blk_io_accounting_add(dst, src);
113 }
114 #endif /* __TASK_IO_ACCOUNTING_OPS_INCLUDED */
115