var (
	DefaultDataLoopbackSize     int64  = 100 * 1024 * 1024 * 1024
	DefaultMetaDataLoopbackSize int64  = 2 * 1024 * 1024 * 1024
	DefaultBaseFsSize           uint64 = 10 * 1024 * 1024 * 1024
	DefaultThinpBlockSize       uint32 = 128      // 64K = 128 512b sectors
	MaxDeviceId                 int    = 0xffffff // 24 bit, pool limit
	DeviceIdMapSz               int    = (MaxDeviceId + 1) / 8
)

type DevInfo struct {
	Hash          string `json:"-"`
	DeviceId      int    `json:"device_id"`
	Size          uint64 `json:"size"`
	TransactionId uint64 `json:"transaction_id"`
	Initialized   bool   `json:"initialized"`
	// contains filtered or unexported fields
}

type DevStatus struct {
	DeviceId            int
	Size                uint64
	TransactionId       uint64
	SizeInSectors       uint64
	MappedSectors       uint64
	HighestMappedSector uint64
}

type DeviceSet struct {
	MetaData   `json:"-"`
	sync.Mutex `json:"-"` // Protects Devices map and serializes calls into libdevmapper

	TransactionId uint64 `json:"-"`
	NextDeviceId  int    `json:"next_device_id"`

	Transaction `json:"-"`
	// contains filtered or unexported fields
}

type DiskUsage struct {
	Used      uint64
	Total     uint64
	Available uint64
}

type Driver struct {
	*DeviceSet
	// contains filtered or unexported fields
}

type MetaData struct {
	Devices map[string]*DevInfo `json:"Devices"`
	// contains filtered or unexported fields
}

type Status struct {
	PoolName          string
	DataFile          string // actual block device for data
	DataLoopback      string // loopback file, if used
	MetadataFile      string // actual block device for metadata
	MetadataLoopback  string // loopback file, if used
	Data              DiskUsage
	Metadata          DiskUsage
	SectorSize        uint64
	UdevSyncSupported bool
}

type Transaction struct {
	OpenTransactionId uint64 `json:"open_transaction_id"`
	DeviceIdHash      string `json:"device_hash"`
	DeviceId          int    `json:"device_id"`
}