Merge tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost
[cris-mirror.git] / include / linux / task_io_accounting_ops.h
blobbb5498bcdd961d2a998dd302b03074adc5ce29ef
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
8 #include <linux/sched.h>
10 #ifdef CONFIG_TASK_IO_ACCOUNTING
11 static inline void task_io_account_read(size_t bytes)
13 current->ioac.read_bytes += bytes;
17 * We approximate number of blocks, because we account bytes only.
18 * A 'block' is 512 bytes
20 static inline unsigned long task_io_get_inblock(const struct task_struct *p)
22 return p->ioac.read_bytes >> 9;
25 static inline void task_io_account_write(size_t bytes)
27 current->ioac.write_bytes += bytes;
31 * We approximate number of blocks, because we account bytes only.
32 * A 'block' is 512 bytes
34 static inline unsigned long task_io_get_oublock(const struct task_struct *p)
36 return p->ioac.write_bytes >> 9;
39 static inline void task_io_account_cancelled_write(size_t bytes)
41 current->ioac.cancelled_write_bytes += bytes;
44 static inline void task_io_accounting_init(struct task_io_accounting *ioac)
46 memset(ioac, 0, sizeof(*ioac));
49 static inline void task_blk_io_accounting_add(struct task_io_accounting *dst,
50 struct task_io_accounting *src)
52 dst->read_bytes += src->read_bytes;
53 dst->write_bytes += src->write_bytes;
54 dst->cancelled_write_bytes += src->cancelled_write_bytes;
57 #else
59 static inline void task_io_account_read(size_t bytes)
63 static inline unsigned long task_io_get_inblock(const struct task_struct *p)
65 return 0;
68 static inline void task_io_account_write(size_t bytes)
72 static inline unsigned long task_io_get_oublock(const struct task_struct *p)
74 return 0;
77 static inline void task_io_account_cancelled_write(size_t bytes)
81 static inline void task_io_accounting_init(struct task_io_accounting *ioac)
85 static inline void task_blk_io_accounting_add(struct task_io_accounting *dst,
86 struct task_io_accounting *src)
90 #endif /* CONFIG_TASK_IO_ACCOUNTING */
92 #ifdef CONFIG_TASK_XACCT
93 static inline void task_chr_io_accounting_add(struct task_io_accounting *dst,
94 struct task_io_accounting *src)
96 dst->rchar += src->rchar;
97 dst->wchar += src->wchar;
98 dst->syscr += src->syscr;
99 dst->syscw += src->syscw;
101 #else
102 static inline void task_chr_io_accounting_add(struct task_io_accounting *dst,
103 struct task_io_accounting *src)
106 #endif /* CONFIG_TASK_XACCT */
108 static inline void task_io_accounting_add(struct task_io_accounting *dst,
109 struct task_io_accounting *src)
111 task_chr_io_accounting_add(dst, src);
112 task_blk_io_accounting_add(dst, src);
114 #endif /* __TASK_IO_ACCOUNTING_OPS_INCLUDED */