github.com/ssdev-go/moby@v17.12.1-ce-rc2+incompatible/daemon/getsize_unix.go (about)

     1  // +build linux freebsd
     2  
     3  package daemon
     4  
     5  import (
     6  	"runtime"
     7  
     8  	"github.com/sirupsen/logrus"
     9  )
    10  
    11  // getSize returns the real size & virtual size of the container.
    12  func (daemon *Daemon) getSize(containerID string) (int64, int64) {
    13  	var (
    14  		sizeRw, sizeRootfs int64
    15  		err                error
    16  	)
    17  
    18  	rwlayer, err := daemon.stores[runtime.GOOS].layerStore.GetRWLayer(containerID)
    19  	if err != nil {
    20  		logrus.Errorf("Failed to compute size of container rootfs %v: %v", containerID, err)
    21  		return sizeRw, sizeRootfs
    22  	}
    23  	defer daemon.stores[runtime.GOOS].layerStore.ReleaseRWLayer(rwlayer)
    24  
    25  	sizeRw, err = rwlayer.Size()
    26  	if err != nil {
    27  		logrus.Errorf("Driver %s couldn't return diff size of container %s: %s",
    28  			daemon.GraphDriverName(runtime.GOOS), containerID, err)
    29  		// FIXME: GetSize should return an error. Not changing it now in case
    30  		// there is a side-effect.
    31  		sizeRw = -1
    32  	}
    33  
    34  	if parent := rwlayer.Parent(); parent != nil {
    35  		sizeRootfs, err = parent.Size()
    36  		if err != nil {
    37  			sizeRootfs = -1
    38  		} else if sizeRw != -1 {
    39  			sizeRootfs += sizeRw
    40  		}
    41  	}
    42  	return sizeRw, sizeRootfs
    43  }