func (devices *DeviceSet) poolStatus() (totalSizeInSectors, transactionId, dataUsed, dataTotal, metadataUsed, metadataTotal uint64, err error) {
var params string
if _, totalSizeInSectors, _, params, err = devicemapper.GetStatus(devices.getPoolName()); err == nil {
_, err = fmt.Sscanf(params, "%d %d/%d %d/%d", &transactionId, &metadataUsed, &metadataTotal, &dataUsed, &dataTotal)
}
return
}
func (devices *DeviceSet) deviceStatus(devName string) (sizeInSectors, mappedSectors, highestMappedSector uint64, err error) {
var params string
_, sizeInSectors, _, params, err = devicemapper.GetStatus(devName)
if err != nil {
return
}
if _, err = fmt.Sscanf(params, "%d %d", &mappedSectors, &highestMappedSector); err == nil {
return
}
return
}
func (devices *DeviceSet) initMetaData() error {
_, _, _, params, err := devicemapper.GetStatus(devices.getPoolName())
if err != nil {
return err
}
if _, err := fmt.Sscanf(params, "%d", &devices.TransactionId); err != nil {
return err
}
devices.NewTransactionId = devices.TransactionId
// Migrate old metadatafile
jsonData, err := ioutil.ReadFile(devices.oldMetadataFile())
if err != nil && !os.IsNotExist(err) {
return err
}
if jsonData != nil {
m := MetaData{Devices: make(map[string]*DevInfo)}
if err := json.Unmarshal(jsonData, &m); err != nil {
return err
}
for hash, info := range m.Devices {
info.Hash = hash
// If the transaction id is larger than the actual one we lost the device due to some crash
if info.TransactionId <= devices.TransactionId {
devices.saveMetadata(info)
}
}
if err := os.Rename(devices.oldMetadataFile(), devices.oldMetadataFile()+".migrated"); err != nil {
return err
}
}
return nil
}