fix orphan storage compatibility

src/mail/incoming.rs

@@ -77,7 +77,7 @@ async fn incoming_mail_watch_process_internal(
 
             tokio::select! {
                 inc_k = wait_new_mail => Some(inc_k),
-                _     = tokio::time::sleep(MAIL_CHECK_INTERVAL) => Some(k2v.from_orphan(incoming_key.to_orphan())),
+                _     = tokio::time::sleep(MAIL_CHECK_INTERVAL) => Some(k2v.from_orphan(incoming_key.to_orphan()).expect("Incompatible source & target storage")),
                 _     = lock_held.changed() => None,
                 _     = rx_inbox_id.changed() => None,
             }
@@ -358,7 +358,7 @@ async fn k2v_lock_loop_internal(
             ));
             lock[8..].copy_from_slice(&our_pid.0);
             let row = match ct {
-                Some(orphan) => k2v.from_orphan(orphan),
+                Some(orphan) => k2v.from_orphan(orphan).expect("Source & target must be storage compatible"),
                 None => k2v.row(pk, sk),
             };
             if let Err(e) = row.set_value(lock).push().await {
@@ -387,7 +387,7 @@ async fn k2v_lock_loop_internal(
         _ => None,
     };
     if let Some(ct) = release {
-        let row = k2v.from_orphan(ct);
+        let row = k2v.from_orphan(ct).expect("Incompatible source & target storage");
         let _ = row.rm().await;
     }
 }

src/mail/user.rs

@@ -306,7 +306,7 @@ impl User {
     ) -> Result<()> {
         let list_blob = seal_serialize(list, &self.creds.keys.master)?;
         let rref = match ct {
-            Some(x) => self.k2v.from_orphan(x),
+            Some(x) => self.k2v.from_orphan(x).expect("Source & target must be same storage"),
             None => self.k2v.row(MAILBOX_LIST_PK, MAILBOX_LIST_SK),
         };
         rref.set_value(list_blob).push().await?;

src/storage/garage.rs

@@ -36,7 +36,7 @@ impl IRowStore for GrgStore {
         unimplemented!();
     }
 
-    fn from_orphan(&self, orphan: OrphanRowRef) -> RowRef {
+    fn from_orphan(&self, orphan: OrphanRowRef) -> Result<RowRef, StorageError> {
         unimplemented!();
     }
 }

src/storage/in_memory.rs

@@ -37,7 +37,7 @@ impl IRowStore for MemStore {
         unimplemented!();
     }
 
-    fn from_orphan(&self, orphan: OrphanRowRef) -> RowRef {
+    fn from_orphan(&self, orphan: OrphanRowRef) -> Result<RowRef, StorageError> {
         unimplemented!();
     }
 }

src/storage/mod.rs

@@ -36,6 +36,7 @@ pub enum Selector<'a> {
 pub enum StorageError {
     NotFound,
     Internal,
+    IncompatibleOrphan,
 }
 impl std::fmt::Display for StorageError {
     fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
@@ -87,7 +88,7 @@ pub trait IRowStore
     fn row(&self, partition: &str, sort: &str) -> RowRef;
     fn select(&self, selector: Selector) -> AsyncResult<Vec<RowValue>>;
     fn rm(&self, selector: Selector) -> AsyncResult<()>;
-    fn from_orphan(&self, orphan: OrphanRowRef) -> RowRef;
+    fn from_orphan(&self, orphan: OrphanRowRef) -> Result<RowRef, StorageError>;
 }
 pub type RowStore = Box<dyn IRowStore + Sync + Send>;