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//go:build linux || freebsd
package images // import "github.com/docker/docker/daemon/images"
import (
"context"
"github.com/containerd/log"
"github.com/docker/docker/image"
"github.com/docker/docker/layer"
)
// GetLayerFolders returns the layer folders from an image RootFS
func (i *ImageService) GetLayerFolders(img *image.Image, rwLayer layer.RWLayer, containerID string) ([]string, error) {
// Windows specific
panic("not implemented")
}
// GetContainerLayerSize returns the real size & virtual size of the container.
func (i *ImageService) GetContainerLayerSize(ctx context.Context, containerID string) (int64, int64, error) {
var (
sizeRw, sizeRootfs int64
err error
)
// Safe to index by runtime.GOOS as Unix hosts don't support multiple
// container operating systems.
rwlayer, err := i.layerStore.GetRWLayer(containerID)
if err != nil {
log.G(ctx).Errorf("Failed to compute size of container rootfs %v: %v", containerID, err)
return sizeRw, sizeRootfs, nil
}
defer i.layerStore.ReleaseRWLayer(rwlayer)
sizeRw, err = rwlayer.Size()
if err != nil {
log.G(ctx).Errorf("Driver %s couldn't return diff size of container %s: %s",
i.layerStore.DriverName(), containerID, err)
// FIXME: GetSize should return an error. Not changing it now in case
// there is a side-effect.
sizeRw = -1
}
if parent := rwlayer.Parent(); parent != nil {
sizeRootfs = parent.Size()
if sizeRw != -1 {
sizeRootfs += sizeRw
}
}
return sizeRw, sizeRootfs, nil
}
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