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/*
* 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;
}
/*
* 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;
}
static inline void task_io_account_write(size_t bytes)
{
current->ioac.write_bytes += bytes;
}
/*
* 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;
}
static inline void task_io_account_cancelled_write(size_t bytes)
{
current->ioac.cancelled_write_bytes += bytes;
}
static inline void task_io_accounting_init(struct task_struct *tsk)
{
memset(&tsk->ioac, 0, sizeof(tsk->ioac));
}
#else
static inline void task_io_account_read(size_t bytes)
{
}
static inline unsigned long task_io_get_inblock(const struct task_struct *p)
{
return 0;
}
static inline void task_io_account_write(size_t bytes)
{
}
static inline unsigned long task_io_get_oublock(const struct task_struct *p)
{
return 0;
}
static inline void task_io_account_cancelled_write(size_t bytes)
{
}
static inline void task_io_accounting_init(struct task_struct *tsk)
{
}
#endif /* CONFIG_TASK_IO_ACCOUNTING */
#endif /* __TASK_IO_ACCOUNTING_OPS_INCLUDED */
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