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// +build linux freebsd
package images // import "github.com/docker/docker/daemon/images"
import (
"runtime"
"github.com/sirupsen/logrus"
)
// GetContainerLayerSize returns the real size & virtual size of the container.
func (i *ImageService) GetContainerLayerSize(containerID string) (int64, int64) {
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.layerStores[runtime.GOOS].GetRWLayer(containerID)
if err != nil {
logrus.Errorf("Failed to compute size of container rootfs %v: %v", containerID, err)
return sizeRw, sizeRootfs
}
defer i.layerStores[runtime.GOOS].ReleaseRWLayer(rwlayer)
sizeRw, err = rwlayer.Size()
if err != nil {
logrus.Errorf("Driver %s couldn't return diff size of container %s: %s",
i.layerStores[runtime.GOOS].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, err = parent.Size()
if err != nil {
sizeRootfs = -1
} else if sizeRw != -1 {
sizeRootfs += sizeRw
}
}
return sizeRw, sizeRootfs
}
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