[Qemu-devel] [PATCH v1 0/4] -object/object-add add 2nd stage initialization

[Igor Mammedov]

Adds UserCreatable interface that objects must inherit from
If they need to be created with help of -object/object-add
commands.

Interface also provides an optional complete() callback,
that is called after object properties are set. Which allows
 * replace custom backend APIs to initialize them with generic
   object_new(); set object properties; object.complete();
   sequence.
 * bail out/report error early (at backend creation time)
   instead of failing later when adding device that uses
   that backend.

Reference to RFC:
https://lists.gnu.org/archive/html/qemu-devel/2014-01/msg00877.html

Changes since RFC:
* rename object_realize interface to UserCreatable
* make UserCreatable interface mandatory for -object/object-add
* drop custom location patch

Git tree for testing:
https://github.com/imammedo/qemu/commits/extend-object-add-v1

Igor Mammedov (4):
  object_add: consolidate error handling
  vl.c: -object: don't ingnore duplicate 'id'
  add optional 2nd stage initialization to -object/object-add commands
  virtio_rng: replace custom backend API with UserCreatable.complete()
    callback

 backends/rng.c                  |   17 +++++++++-
 hw/virtio/virtio-rng.c          |   15 +++++----
 include/qom/object_interfaces.h |   62 +++++++++++++++++++++++++++++++++++++++
 include/sysemu/rng.h            |   11 -------
 qmp.c                           |   22 +++++++++++--
 qom/Makefile.objs               |    1 +
 qom/object_interfaces.c         |   32 ++++++++++++++++++++
 vl.c                            |   22 +++++++++++++-
 8 files changed, 158 insertions(+), 24 deletions(-)
 create mode 100644 include/qom/object_interfaces.h
 create mode 100644 qom/object_interfaces.c