Expose the allocated information for the block device

Signed-off-by: mulhern <[email protected]>

src/engine/engine.rs

@@ -103,6 +103,9 @@ pub trait BlockDev: Debug {
 
     /// Get the status of whether a block device is encrypted or not.
     fn is_encrypted(&self) -> bool;
+
+    /// The total number of sectors allocated from this block device
+    fn allocated(&self) -> Sectors;
 }
 
 pub trait Pool: Debug {

src/engine/sim_engine/blockdev.rs

@@ -59,6 +59,10 @@ impl BlockDev for SimDev {
     fn is_encrypted(&self) -> bool {
         self.encryption_info.is_some()
     }
+
+    fn allocated(&self) -> Sectors {
+        Bytes::from(IEC::Mi).sectors()
+    }
 }
 
 impl SimDev {

src/engine/strat_engine/backstore/blockdev.rs

@@ -199,11 +199,6 @@ impl StratBlockDev {
         self.used.available()
     }
 
-    /// The number of Sectors on this device which have been allocated.
-    pub fn used(&self) -> Sectors {
-        self.used.used()
-    }
-
     /// The total size of the Stratis block device.
     pub fn total_size(&self) -> BlockdevSize {
         let size = self.used.size();
@@ -345,6 +340,10 @@ impl BlockDev for StratBlockDev {
     fn is_encrypted(&self) -> bool {
         self.encryption_info().is_some()
     }
+
+    fn allocated(&self) -> Sectors {
+        self.used.used()
+    }
 }
 
 impl Recordable<BaseBlockDevSave> for StratBlockDev {