Release 4.7 include/linux/task_io_accounting_ops.h
/*
* Task I/O accounting operations
*/
#ifndef __TASK_IO_ACCOUNTING_OPS_INCLUDED
#define __TASK_IO_ACCOUNTING_OPS_INCLUDED
#include <linux/sched.h>
#ifdef CONFIG_TASK_IO_ACCOUNTING
static inline void task_io_account_read(size_t bytes)
{
current->ioac.read_bytes += bytes;
}
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/*
* We approximate number of blocks, because we account bytes only.
* A 'block' is 512 bytes
*/
static inline unsigned long task_io_get_inblock(const struct task_struct *p)
{
return p->ioac.read_bytes >> 9;
}
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static inline void task_io_account_write(size_t bytes)
{
current->ioac.write_bytes += bytes;
}
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/*
* We approximate number of blocks, because we account bytes only.
* A 'block' is 512 bytes
*/
static inline unsigned long task_io_get_oublock(const struct task_struct *p)
{
return p->ioac.write_bytes >> 9;
}
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static inline void task_io_account_cancelled_write(size_t bytes)
{
current->ioac.cancelled_write_bytes += bytes;
}
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static inline void task_io_accounting_init(struct task_io_accounting *ioac)
{
memset(ioac, 0, sizeof(*ioac));
}
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static inline void task_blk_io_accounting_add(struct task_io_accounting *dst,
struct task_io_accounting *src)
{
dst->read_bytes += src->read_bytes;
dst->write_bytes += src->write_bytes;
dst->cancelled_write_bytes += src->cancelled_write_bytes;
}
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#else
static inline void task_io_account_read(size_t bytes)
{
}
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static inline unsigned long task_io_get_inblock(const struct task_struct *p)
{
return 0;
}
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static inline void task_io_account_write(size_t bytes)
{
}
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static inline unsigned long task_io_get_oublock(const struct task_struct *p)
{
return 0;
}
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static inline void task_io_account_cancelled_write(size_t bytes)
{
}
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static inline void task_io_accounting_init(struct task_io_accounting *ioac)
{
}
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static inline void task_blk_io_accounting_add(struct task_io_accounting *dst,
struct task_io_accounting *src)
{
}
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#endif /* CONFIG_TASK_IO_ACCOUNTING */
#ifdef CONFIG_TASK_XACCT
static inline void task_chr_io_accounting_add(struct task_io_accounting *dst,
struct task_io_accounting *src)
{
dst->rchar += src->rchar;
dst->wchar += src->wchar;
dst->syscr += src->syscr;
dst->syscw += src->syscw;
}
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#else
static inline void task_chr_io_accounting_add(struct task_io_accounting *dst,
struct task_io_accounting *src)
{
}
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#endif /* CONFIG_TASK_XACCT */
static inline void task_io_accounting_add(struct task_io_accounting *dst,
struct task_io_accounting *src)
{
task_chr_io_accounting_add(dst, src);
task_blk_io_accounting_add(dst, src);
}
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#endif /* __TASK_IO_ACCOUNTING_OPS_INCLUDED */
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