ImageService: rename GraphDriverName to StorageDriver

Make the function name more generic, as it's no longer used only
for graphdrivers but also for snapshotters.

Signed-off-by: Sebastiaan van Stijn <github@gone.nl>

daemon/container.go

@@ -154,7 +154,7 @@ func (daemon *Daemon) newContainer(name string, operatingSystem string, config *
 	base.ImageID = imgID
 	base.NetworkSettings = &network.Settings{IsAnonymousEndpoint: noExplicitName}
 	base.Name = name
-	base.Driver = daemon.imageService.GraphDriverName()
+	base.Driver = daemon.imageService.StorageDriver()
 	base.OS = operatingSystem
 	return base, err
 }

daemon/containerd/service.go

@@ -78,10 +78,9 @@ func (i *ImageService) Cleanup() error {
 	return nil
 }
 
-// GraphDriverName returns the name of the graph drvier
-// moved from Daemon.GraphDriverName, used by:
-// - newContainer
-func (i *ImageService) GraphDriverName() string {
+// StorageDriver returns the name of the default storage-driver (snapshotter)
+// used by the ImageService.
+func (i *ImageService) StorageDriver() string {
 	return ""
 }
 

daemon/image_service.go

@@ -72,6 +72,6 @@ type ImageService interface {
 	DistributionServices() images.DistributionServices
 	Children(id image.ID) []image.ID
 	Cleanup() error
-	GraphDriverName() string
+	StorageDriver() string
 	UpdateConfig(maxDownloads, maxUploads int)
 }

daemon/images/service.go

@@ -172,10 +172,8 @@ func (i *ImageService) Cleanup() error {
 	return nil
 }
 
-// GraphDriverName returns the name of the graph drvier
-// moved from Daemon.GraphDriverName, used by:
-// - newContainer
-func (i *ImageService) GraphDriverName() string {
+// StorageDriver returns the name of the storage driver used by the ImageService.
+func (i *ImageService) StorageDriver() string {
 	return i.layerStore.DriverName()
 }