Timer is a complex struct, allow adding it to a struct that
uses #[derive(ToMigrationState)]; similar to vmstate_timer, only
the expiration time has to be preserved.
Signed-off-by: Paolo Bonzini <pbonz...@redhat.com>
---
rust/migration/src/migratable.rs | 31 +++++++++++++++++++++++++++++++
1 file changed, 31 insertions(+)
diff --git a/rust/migration/src/migratable.rs b/rust/migration/src/migratable.rs
index fa25317eea8..c4ad4f73d5c 100644
--- a/rust/migration/src/migratable.rs
+++ b/rust/migration/src/migratable.rs
@@ -202,6 +202,37 @@ fn restore_migrated_state(
) -> Result<(), InvalidError>;
}
+impl ToMigrationState for util::timer::Timer {
+ type Migrated = i64;
+
+ fn snapshot_migration_state(&self, target: &mut i64) -> Result<(),
InvalidError> {
+ // SAFETY: as_ptr() is unsafe to ensure that the caller reasons about
+ // the pinning of the data inside the Opaque<>. Here all we do is
+ // access a field.
+ *target = unsafe { &*self.as_ptr() }.expire_time;
+ Ok(())
+ }
+
+ fn restore_migrated_state_mut(
+ &mut self,
+ source: Self::Migrated,
+ version_id: u8,
+ ) -> Result<(), InvalidError> {
+ self.restore_migrated_state(source, version_id)
+ }
+}
+
+impl ToMigrationStateShared for util::timer::Timer {
+ fn restore_migrated_state(&self, source: i64, _version_id: u8) ->
Result<(), InvalidError> {
+ if source >= 0 {
+ self.modify(source as u64);
+ } else {
+ self.delete();
+ }
+ Ok(())
+ }
+}
+
impl<T: ToMigrationStateShared, const N: usize> ToMigrationStateShared for [T;
N]
where
[T::Migrated; N]: Default,
--
2.51.0
