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0005 #ifndef __TASK_IO_ACCOUNTING_OPS_INCLUDED
0006 #define __TASK_IO_ACCOUNTING_OPS_INCLUDED
0007
0008 #include <linux/sched.h>
0009
0010 #ifdef CONFIG_TASK_IO_ACCOUNTING
0011 static inline void task_io_account_read(size_t bytes)
0012 {
0013 current->ioac.read_bytes += bytes;
0014 }
0015
0016
0017
0018
0019
0020 static inline unsigned long task_io_get_inblock(const struct task_struct *p)
0021 {
0022 return p->ioac.read_bytes >> 9;
0023 }
0024
0025 static inline void task_io_account_write(size_t bytes)
0026 {
0027 current->ioac.write_bytes += bytes;
0028 }
0029
0030
0031
0032
0033
0034 static inline unsigned long task_io_get_oublock(const struct task_struct *p)
0035 {
0036 return p->ioac.write_bytes >> 9;
0037 }
0038
0039 static inline void task_io_account_cancelled_write(size_t bytes)
0040 {
0041 current->ioac.cancelled_write_bytes += bytes;
0042 }
0043
0044 static inline void task_io_accounting_init(struct task_io_accounting *ioac)
0045 {
0046 memset(ioac, 0, sizeof(*ioac));
0047 }
0048
0049 static inline void task_blk_io_accounting_add(struct task_io_accounting *dst,
0050 struct task_io_accounting *src)
0051 {
0052 dst->read_bytes += src->read_bytes;
0053 dst->write_bytes += src->write_bytes;
0054 dst->cancelled_write_bytes += src->cancelled_write_bytes;
0055 }
0056
0057 #else
0058
0059 static inline void task_io_account_read(size_t bytes)
0060 {
0061 }
0062
0063 static inline unsigned long task_io_get_inblock(const struct task_struct *p)
0064 {
0065 return 0;
0066 }
0067
0068 static inline void task_io_account_write(size_t bytes)
0069 {
0070 }
0071
0072 static inline unsigned long task_io_get_oublock(const struct task_struct *p)
0073 {
0074 return 0;
0075 }
0076
0077 static inline void task_io_account_cancelled_write(size_t bytes)
0078 {
0079 }
0080
0081 static inline void task_io_accounting_init(struct task_io_accounting *ioac)
0082 {
0083 }
0084
0085 static inline void task_blk_io_accounting_add(struct task_io_accounting *dst,
0086 struct task_io_accounting *src)
0087 {
0088 }
0089
0090 #endif
0091
0092 #ifdef CONFIG_TASK_XACCT
0093 static inline void task_chr_io_accounting_add(struct task_io_accounting *dst,
0094 struct task_io_accounting *src)
0095 {
0096 dst->rchar += src->rchar;
0097 dst->wchar += src->wchar;
0098 dst->syscr += src->syscr;
0099 dst->syscw += src->syscw;
0100 }
0101 #else
0102 static inline void task_chr_io_accounting_add(struct task_io_accounting *dst,
0103 struct task_io_accounting *src)
0104 {
0105 }
0106 #endif
0107
0108 static inline void task_io_accounting_add(struct task_io_accounting *dst,
0109 struct task_io_accounting *src)
0110 {
0111 task_chr_io_accounting_add(dst, src);
0112 task_blk_io_accounting_add(dst, src);
0113 }
0114 #endif