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-rw-r--r--backends/cryptodev.c19
1 files changed, 19 insertions, 0 deletions
diff --git a/backends/cryptodev.c b/backends/cryptodev.c
index 4a49f9762f..6a66c27d68 100644
--- a/backends/cryptodev.c
+++ b/backends/cryptodev.c
@@ -197,6 +197,22 @@ out:
     error_propagate(errp, local_err);
 }
 
+void cryptodev_backend_set_used(CryptoDevBackend *backend, bool used)
+{
+    backend->is_used = used;
+}
+
+bool cryptodev_backend_is_used(CryptoDevBackend *backend)
+{
+    return backend->is_used;
+}
+
+static bool
+cryptodev_backend_can_be_deleted(UserCreatable *uc, Error **errp)
+{
+    return !cryptodev_backend_is_used(CRYPTODEV_BACKEND(uc));
+}
+
 static void cryptodev_backend_instance_init(Object *obj)
 {
     object_property_add(obj, "queues", "int",
@@ -209,7 +225,9 @@ static void cryptodev_backend_instance_init(Object *obj)
 
 static void cryptodev_backend_finalize(Object *obj)
 {
+    CryptoDevBackend *backend = CRYPTODEV_BACKEND(obj);
 
+    cryptodev_backend_cleanup(backend, NULL);
 }
 
 static void
@@ -218,6 +236,7 @@ cryptodev_backend_class_init(ObjectClass *oc, void *data)
     UserCreatableClass *ucc = USER_CREATABLE_CLASS(oc);
 
     ucc->complete = cryptodev_backend_complete;
+    ucc->can_be_deleted = cryptodev_backend_can_be_deleted;
 
     QTAILQ_INIT(&crypto_clients);
 }