github.com/containers/libpod@v1.9.4-0.20220419124438-4284fd425507/libpod/driver/driver.go (about)

     1  package driver
     2  
     3  import (
     4  	cstorage "github.com/containers/storage"
     5  )
     6  
     7  // Data handles the data for a storage driver
     8  type Data struct {
     9  	Name string            `json:"Name"`
    10  	Data map[string]string `json:"Data"`
    11  }
    12  
    13  // GetDriverName returns the name of the driver for the given store
    14  func GetDriverName(store cstorage.Store) (string, error) {
    15  	driver, err := store.GraphDriver()
    16  	if err != nil {
    17  		return "", err
    18  	}
    19  	return driver.String(), nil
    20  }
    21  
    22  // GetDriverMetadata returns the metadata regarding the driver for the layer in the given store
    23  func GetDriverMetadata(store cstorage.Store, layerID string) (map[string]string, error) {
    24  	driver, err := store.GraphDriver()
    25  	if err != nil {
    26  		return nil, err
    27  	}
    28  	return driver.Metadata(layerID)
    29  }
    30  
    31  // GetDriverData returns the Data struct with information of the driver used by the store
    32  func GetDriverData(store cstorage.Store, layerID string) (*Data, error) {
    33  	name, err := GetDriverName(store)
    34  	if err != nil {
    35  		return nil, err
    36  	}
    37  	metaData, err := GetDriverMetadata(store, layerID)
    38  	if err != nil {
    39  		return nil, err
    40  	}
    41  	if mountTimes, err := store.Mounted(layerID); mountTimes == 0 || err != nil {
    42  		delete(metaData, "MergedDir")
    43  	}
    44  
    45  	return &Data{
    46  		Name: name,
    47  		Data: metaData,
    48  	}, nil
    49  }