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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 | { | |
940389b8 | 12 | current->ioac.read_bytes += bytes; |
7c3ab738 AM |
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 | { | |
940389b8 | 21 | return p->ioac.read_bytes >> 9; |
6eaeeaba ED |
22 | } |
23 | ||
7c3ab738 AM |
24 | static inline void task_io_account_write(size_t bytes) |
25 | { | |
940389b8 | 26 | current->ioac.write_bytes += bytes; |
7c3ab738 AM |
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 | { | |
940389b8 | 35 | return p->ioac.write_bytes >> 9; |
6eaeeaba ED |
36 | } |
37 | ||
7c3ab738 AM |
38 | static inline void task_io_account_cancelled_write(size_t bytes) |
39 | { | |
940389b8 | 40 | current->ioac.cancelled_write_bytes += bytes; |
7c3ab738 AM |
41 | } |
42 | ||
940389b8 | 43 | static inline void task_io_accounting_init(struct task_io_accounting *ioac) |
7c3ab738 | 44 | { |
5995477a AR |
45 | memset(ioac, 0, sizeof(*ioac)); |
46 | } | |
47 | ||
940389b8 AR |
48 | static inline void task_blk_io_accounting_add(struct task_io_accounting *dst, |
49 | struct task_io_accounting *src) | |
5995477a | 50 | { |
940389b8 AR |
51 | dst->read_bytes += src->read_bytes; |
52 | dst->write_bytes += src->write_bytes; | |
53 | dst->cancelled_write_bytes += src->cancelled_write_bytes; | |
7c3ab738 AM |
54 | } |
55 | ||
56 | #else | |
57 | ||
58 | static inline void task_io_account_read(size_t bytes) | |
59 | { | |
60 | } | |
61 | ||
6eaeeaba ED |
62 | static inline unsigned long task_io_get_inblock(const struct task_struct *p) |
63 | { | |
64 | return 0; | |
65 | } | |
66 | ||
7c3ab738 AM |
67 | static inline void task_io_account_write(size_t bytes) |
68 | { | |
69 | } | |
70 | ||
6eaeeaba ED |
71 | static inline unsigned long task_io_get_oublock(const struct task_struct *p) |
72 | { | |
73 | return 0; | |
74 | } | |
75 | ||
7c3ab738 AM |
76 | static inline void task_io_account_cancelled_write(size_t bytes) |
77 | { | |
78 | } | |
79 | ||
940389b8 | 80 | static inline void task_io_accounting_init(struct task_io_accounting *ioac) |
5995477a AR |
81 | { |
82 | } | |
83 | ||
940389b8 AR |
84 | static inline void task_blk_io_accounting_add(struct task_io_accounting *dst, |
85 | struct task_io_accounting *src) | |
7c3ab738 AM |
86 | { |
87 | } | |
88 | ||
5995477a AR |
89 | #endif /* CONFIG_TASK_IO_ACCOUNTING */ |
90 | ||
91 | #ifdef CONFIG_TASK_XACCT | |
940389b8 AR |
92 | static inline void task_chr_io_accounting_add(struct task_io_accounting *dst, |
93 | struct task_io_accounting *src) | |
5995477a | 94 | { |
940389b8 AR |
95 | dst->rchar += src->rchar; |
96 | dst->wchar += src->wchar; | |
97 | dst->syscr += src->syscr; | |
98 | dst->syscw += src->syscw; | |
5995477a AR |
99 | } |
100 | #else | |
940389b8 AR |
101 | static inline void task_chr_io_accounting_add(struct task_io_accounting *dst, |
102 | struct task_io_accounting *src) | |
5995477a AR |
103 | { |
104 | } | |
105 | #endif /* CONFIG_TASK_XACCT */ | |
106 | ||
940389b8 AR |
107 | static inline void task_io_accounting_add(struct task_io_accounting *dst, |
108 | struct task_io_accounting *src) | |
5995477a AR |
109 | { |
110 | task_chr_io_accounting_add(dst, src); | |
111 | task_blk_io_accounting_add(dst, src); | |
112 | } | |
113 | #endif /* __TASK_IO_ACCOUNTING_OPS_INCLUDED */ |