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
