krata: work on parallel reconciliation

crates/runtime/src/autoloop.rs

@@ -1,17 +1,25 @@
+use std::{sync::Arc, time::Duration};
+
 use anyhow::{anyhow, Result};
+use log::debug;
 use loopdev::{LoopControl, LoopDevice};
+use tokio::time::sleep;
 use xenclient::BlockDeviceRef;
 
+#[derive(Clone)]
 pub struct AutoLoop {
-    control: LoopControl,
+    control: Arc<LoopControl>,
 }
 
 impl AutoLoop {
     pub fn new(control: LoopControl) -> AutoLoop {
-        AutoLoop { control }
+        AutoLoop {
+            control: Arc::new(control),
+        }
     }
 
     pub fn loopify(&self, file: &str) -> Result<BlockDeviceRef> {
+        debug!("creating loop for file {}", file);
         let device = self.control.next_free()?;
         device.with().read_only(true).attach(file)?;
         let path = device
@@ -25,9 +33,10 @@ impl AutoLoop {
         Ok(BlockDeviceRef { path, major, minor })
     }
 
-    pub fn unloop(&self, device: &str) -> Result<()> {
+    pub async fn unloop(&self, device: &str) -> Result<()> {
         let device = LoopDevice::open(device)?;
         device.detach()?;
+        sleep(Duration::from_millis(200)).await;
         Ok(())
     }
 }