Move stats api types into api/types package

Move the stats structs from the api/stats package into a new package
api/types that will contain all the api structs for docker's api request
and responses.

Signed-off-by: Michael Crosby <crosbymichael@gmail.com>

types/stats.go

@@ -0,0 +1,87 @@
+// This package is used for API stability in the types and response to the
+// consumers of the API stats endpoint.
+package types
+
+import "time"
+
+type ThrottlingData struct {
+	// Number of periods with throttling active
+	Periods uint64 `json:"periods"`
+	// Number of periods when the container hit its throttling limit.
+	ThrottledPeriods uint64 `json:"throttled_periods"`
+	// Aggregate time the container was throttled for in nanoseconds.
+	ThrottledTime uint64 `json:"throttled_time"`
+}
+
+// All CPU stats are aggregated since container inception.
+type CpuUsage struct {
+	// Total CPU time consumed.
+	// Units: nanoseconds.
+	TotalUsage uint64 `json:"total_usage"`
+	// Total CPU time consumed per core.
+	// Units: nanoseconds.
+	PercpuUsage []uint64 `json:"percpu_usage"`
+	// Time spent by tasks of the cgroup in kernel mode.
+	// Units: nanoseconds.
+	UsageInKernelmode uint64 `json:"usage_in_kernelmode"`
+	// Time spent by tasks of the cgroup in user mode.
+	// Units: nanoseconds.
+	UsageInUsermode uint64 `json:"usage_in_usermode"`
+}
+
+type CpuStats struct {
+	CpuUsage       CpuUsage       `json:"cpu_usage"`
+	SystemUsage    uint64         `json:"system_cpu_usage"`
+	ThrottlingData ThrottlingData `json:"throttling_data,omitempty"`
+}
+
+type MemoryStats struct {
+	// current res_counter usage for memory
+	Usage uint64 `json:"usage"`
+	// maximum usage ever recorded.
+	MaxUsage uint64 `json:"max_usage"`
+	// TODO(vishh): Export these as stronger types.
+	// all the stats exported via memory.stat.
+	Stats map[string]uint64 `json:"stats"`
+	// number of times memory usage hits limits.
+	Failcnt uint64 `json:"failcnt"`
+	Limit   uint64 `json:"limit"`
+}
+
+type BlkioStatEntry struct {
+	Major uint64 `json:"major"`
+	Minor uint64 `json:"minor"`
+	Op    string `json:"op"`
+	Value uint64 `json:"value"`
+}
+
+type BlkioStats struct {
+	// number of bytes tranferred to and from the block device
+	IoServiceBytesRecursive []BlkioStatEntry `json:"io_service_bytes_recursive"`
+	IoServicedRecursive     []BlkioStatEntry `json:"io_serviced_recursive"`
+	IoQueuedRecursive       []BlkioStatEntry `json:"io_queue_recursive"`
+	IoServiceTimeRecursive  []BlkioStatEntry `json:"io_service_time_recursive"`
+	IoWaitTimeRecursive     []BlkioStatEntry `json:"io_wait_time_recursive"`
+	IoMergedRecursive       []BlkioStatEntry `json:"io_merged_recursive"`
+	IoTimeRecursive         []BlkioStatEntry `json:"io_time_recursive"`
+	SectorsRecursive        []BlkioStatEntry `json:"sectors_recursive"`
+}
+
+type Network struct {
+	RxBytes   uint64 `json:"rx_bytes"`
+	RxPackets uint64 `json:"rx_packets"`
+	RxErrors  uint64 `json:"rx_errors"`
+	RxDropped uint64 `json:"rx_dropped"`
+	TxBytes   uint64 `json:"tx_bytes"`
+	TxPackets uint64 `json:"tx_packets"`
+	TxErrors  uint64 `json:"tx_errors"`
+	TxDropped uint64 `json:"tx_dropped"`
+}
+
+type Stats struct {
+	Read        time.Time   `json:"read"`
+	Network     Network     `json:"network,omitempty"`
+	CpuStats    CpuStats    `json:"cpu_stats,omitempty"`
+	MemoryStats MemoryStats `json:"memory_stats,omitempty"`
+	BlkioStats  BlkioStats  `json:"blkio_stats,omitempty"`
+}