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