Commit | Line | Data |
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7c3ab738 AM |
1 | /* |
2 | * Task I/O accounting operations | |
3 | */ | |
4 | #ifndef __TASK_IO_ACCOUNTING_OPS_INCLUDED | |
5 | #define __TASK_IO_ACCOUNTING_OPS_INCLUDED | |
6 | ||
e8edc6e0 AD |
7 | #include <linux/sched.h> |
8 | ||
7c3ab738 AM |
9 | #ifdef CONFIG_TASK_IO_ACCOUNTING |
10 | static inline void task_io_account_read(size_t bytes) | |
11 | { | |
12 | current->ioac.read_bytes += bytes; | |
13 | } | |
14 | ||
6eaeeaba ED |
15 | /* |
16 | * We approximate number of blocks, because we account bytes only. | |
17 | * A 'block' is 512 bytes | |
18 | */ | |
19 | static inline unsigned long task_io_get_inblock(const struct task_struct *p) | |
20 | { | |
21 | return p->ioac.read_bytes >> 9; | |
22 | } | |
23 | ||
7c3ab738 AM |
24 | static inline void task_io_account_write(size_t bytes) |
25 | { | |
26 | current->ioac.write_bytes += bytes; | |
27 | } | |
28 | ||
6eaeeaba ED |
29 | /* |
30 | * We approximate number of blocks, because we account bytes only. | |
31 | * A 'block' is 512 bytes | |
32 | */ | |
33 | static inline unsigned long task_io_get_oublock(const struct task_struct *p) | |
34 | { | |
35 | return p->ioac.write_bytes >> 9; | |
36 | } | |
37 | ||
7c3ab738 AM |
38 | static inline void task_io_account_cancelled_write(size_t bytes) |
39 | { | |
40 | current->ioac.cancelled_write_bytes += bytes; | |
41 | } | |
42 | ||
43 | static inline void task_io_accounting_init(struct task_struct *tsk) | |
44 | { | |
45 | memset(&tsk->ioac, 0, sizeof(tsk->ioac)); | |
46 | } | |
47 | ||
48 | #else | |
49 | ||
50 | static inline void task_io_account_read(size_t bytes) | |
51 | { | |
52 | } | |
53 | ||
6eaeeaba ED |
54 | static inline unsigned long task_io_get_inblock(const struct task_struct *p) |
55 | { | |
56 | return 0; | |
57 | } | |
58 | ||
7c3ab738 AM |
59 | static inline void task_io_account_write(size_t bytes) |
60 | { | |
61 | } | |
62 | ||
6eaeeaba ED |
63 | static inline unsigned long task_io_get_oublock(const struct task_struct *p) |
64 | { | |
65 | return 0; | |
66 | } | |
67 | ||
7c3ab738 AM |
68 | static inline void task_io_account_cancelled_write(size_t bytes) |
69 | { | |
70 | } | |
71 | ||
72 | static inline void task_io_accounting_init(struct task_struct *tsk) | |
73 | { | |
74 | } | |
75 | ||
76 | #endif /* CONFIG_TASK_IO_ACCOUNTING */ | |
77 | #endif /* __TASK_IO_ACCOUNTING_OPS_INCLUDED */ |