diff options
| -rw-r--r-- | include/qom/object_interfaces.h | 13 | ||||
| -rw-r--r-- | qmp.c | 5 | ||||
| -rw-r--r-- | qom/object_interfaces.c | 12 |
3 files changed, 30 insertions, 0 deletions
diff --git a/include/qom/object_interfaces.h b/include/qom/object_interfaces.h index b7922833e1..283ae0db4d 100644 --- a/include/qom/object_interfaces.h +++ b/include/qom/object_interfaces.h @@ -25,6 +25,8 @@ typedef struct UserCreatable { * UserCreatableClass: * @parent_class: the base class * @complete: callback to be called after @obj's properties are set. + * @can_be_deleted: callback to be called before an object is removed + * to check if @obj can be removed safely. * * Interface is designed to work with -object/object-add/object_add * commands. @@ -47,6 +49,7 @@ typedef struct UserCreatableClass { /* <public> */ void (*complete)(UserCreatable *uc, Error **errp); + bool (*can_be_deleted)(UserCreatable *uc, Error **errp); } UserCreatableClass; /** @@ -59,4 +62,14 @@ typedef struct UserCreatableClass { * nothing. */ void user_creatable_complete(Object *obj, Error **errp); + +/** + * user_creatable_can_be_deleted: + * @uc: the object whose can_be_deleted() method is called if implemented + * @errp: if an error occurs, a pointer to an area to store the error + * + * Wrapper to call can_be_deleted() method if one of types it's inherited + * from implements USER_CREATABLE interface. + */ +bool user_creatable_can_be_deleted(UserCreatable *uc, Error **errp); #endif @@ -711,6 +711,11 @@ void qmp_object_del(const char *id, Error **errp) error_setg(errp, "object id not found"); return; } + + if (!user_creatable_can_be_deleted(USER_CREATABLE(obj), errp)) { + error_setg(errp, "%s is in use, can not be deleted", id); + return; + } object_unparent(obj); } diff --git a/qom/object_interfaces.c b/qom/object_interfaces.c index 6360818397..a66cd6026c 100644 --- a/qom/object_interfaces.c +++ b/qom/object_interfaces.c @@ -18,6 +18,18 @@ void user_creatable_complete(Object *obj, Error **errp) } } +bool user_creatable_can_be_deleted(UserCreatable *uc, Error **errp) +{ + + UserCreatableClass *ucc = USER_CREATABLE_GET_CLASS(uc); + + if (ucc->can_be_deleted) { + return ucc->can_be_deleted(uc, errp); + } else { + return true; + } +} + static void register_types(void) { static const TypeInfo uc_interface_info = { |