fix remote err && lock err

Signed-off-by: junxiang Mu <1948535941@qq.com>

ecstore/src/disk/mod.rs

@@ -1561,7 +1561,7 @@ impl Reader for RemoteFileReader {
             path: self.path.to_string(),
             offset: offset.try_into().unwrap(),
             // length: length.try_into().unwrap(),
-            length: 0,
+            length: buf.len().try_into().unwrap(),
         };
         self.tx.send(request).await?;