new version for device_manager persis.

Signed-off-by: Egor Lazarchuk <[email protected]>

Author: ShadowCurse

src/vmm/src/device_manager/persist.rs

@@ -199,6 +199,7 @@ pub struct DeviceStates {
     /// Virtio block device states.
     pub virtio_block_devices: Vec<ConnectedVirtioBlockState>,
     /// Vhost-user block device states.
+    #[version(start = 5, de_fn = "de_vhost_user_block")]
     pub vhost_user_block_devices: Vec<ConnectedVhostUserBlockState>,
     /// Net device states.
     pub net_devices: Vec<ConnectedNetState>,
@@ -258,6 +259,14 @@ impl DeviceStates {
 
         Ok(())
     }
+
+    fn de_vhost_user_block(&mut self, source_version: u16) -> VersionizeResult<()> {
+        if source_version < 5 {
+            self.vhost_user_block_devices = vec![];
+        }
+
+        Ok(())
+    }
 }
 
 pub struct MMIODevManagerConstructorArgs<'a> {

src/vmm/src/version_map.rs

@@ -86,6 +86,7 @@ lazy_static! {
         version_map.new_version();
 
         version_map.set_type_version(VirtioDeviceState::type_id(), 2);
+        version_map.set_type_version(DeviceStates::type_id(), 5);
 
         version_map
     };