On Sat, 28 Mar 2015 00:55:29 +0800
Lin Ma <address@hidden> wrote:
If backends implement the can_be_deleted and it returns false,
Then the qmp_object_del won't delete the given backends.
Signed-off-by: Lin Ma <address@hidden>
---
include/qom/object_interfaces.h | 14 ++++++++++++++
qmp.c | 5 +++++
qom/object_interfaces.c | 14 ++++++++++++++
3 files changed, 33 insertions(+)
diff --git a/include/qom/object_interfaces.h b/include/qom/object_interfaces.h
index b792283..012b653 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 +62,15 @@ typedef struct UserCreatableClass {
* nothing.
*/
void user_creatable_complete(Object *obj, Error **errp);
+
+/**
+ * user_creatable_can_be_deleted:
+ * @obj: the object whose can_be_deleted() method is called if defined
s/obj/uc/
s/defined/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, otherwise the call does
+ * nothing.
drop ", otherwise the call does nothing"
+bool user_creatable_can_be_deleted(Object *obj, Error **errp);
[...]
+bool user_creatable_can_be_deleted(Object *obj, Error **errp)
+{
+
+ UserCreatableClass *ucc;
+ UserCreatable *uc = USER_CREATABLE(obj);
Function description doesn't match what it does, I mean part
"otherwise the call does nothing."
How about changing prototype to:
bool user_creatable_can_be_deleted(UserCreatable *uc, Error **errp)
and calling it in qmp.c like:
user_creatable_can_be_deleted(USER_CREATABLE(obj), errp);