@@ -49,6 +49,7 @@ will display something like:

 	Storage Driver: devicemapper

 	 Pool Name: docker-253:1-17538953-pool

 	 Pool Blocksize: 65.54 kB

+	 Base Device Size: 107.4 GB

 	 Data file: /dev/loop4

 	 Metadata file: /dev/loop4

 	 Data Space Used: 2.536 GB

@@ -69,6 +70,7 @@ Each item in the indented section under `Storage Driver: devicemapper` are

 status information about the driver.

  *  `Pool Name` name of the devicemapper pool for this driver.

  *  `Pool Blocksize` tells the blocksize the thin pool was initialized with. This only changes on creation.

+ *  `Base Device Size` tells the maximum size of a container and image

  *  `Data file` blockdevice file used for the devicemapper data

  *  `Metadata file` blockdevice file used for the devicemapper metadata

  *  `Data Space Used` tells how much of `Data file` is currently used

@@ -146,6 +146,8 @@ type Status struct {

 	Data DiskUsage

 	// Metadata is the disk used for meta data.

 	Metadata DiskUsage

+	// BaseDeviceSize is base size of container and image

+	BaseDeviceSize uint64

 	// SectorSize size of the vector.

 	SectorSize uint64

 	// UdevSyncSupported is true if sync is supported.

@@ -833,6 +835,14 @@ func getDeviceUUID(device string) (string, error) {

 	return uuid, nil

 }

+func (devices *DeviceSet) getBaseDeviceSize() uint64 {

+	info, _ := devices.lookupDevice("")

+	if info == nil {

+		return 0

+	}

+	return info.Size

+}

+

 func (devices *DeviceSet) verifyBaseDeviceUUID(baseInfo *devInfo) error {

 	devices.Lock()

 	defer devices.Unlock()

@@ -2198,6 +2208,7 @@ func (devices *DeviceSet) Status() *Status {

 	status.DeferredRemoveEnabled = devices.deferredRemove

 	status.DeferredDeleteEnabled = devices.deferredDelete

 	status.DeferredDeletedDeviceCount = devices.nrDeletedDevices

+	status.BaseDeviceSize = devices.getBaseDeviceSize()

 	totalSizeInSectors, _, dataUsed, dataTotal, metadataUsed, metadataTotal, err := devices.poolStatus()

 	if err == nil {

@@ -79,6 +79,7 @@ func (d *Driver) Status() [][2]string {

 	status := [][2]string{

 		{"Pool Name", s.PoolName},

 		{"Pool Blocksize", fmt.Sprintf("%s", units.HumanSize(float64(s.SectorSize)))},

+		{"Base Device Size", fmt.Sprintf("%s", units.HumanSize(float64(s.BaseDeviceSize)))},

 		{"Backing Filesystem", backingFs},

 		{"Data file", s.DataFile},

 		{"Metadata file", s.MetadataFile},