Re: [PATCH v4 0/3] Avoid abort on QMP attempt to add an object with duplicate id

[Paolo Bonzini <pbonzini@redhat.com>]

On 29/06/20 13:23, Eric Auger wrote:
> Attempting to add an object through QMP with an id that is
> already used leads to a qemu abort. This is a regression since
> d2623129a7de ("qom: Drop parameter @errp of object_property_add()
> & friends").
> 
> The first patch fixes the issue and the second patch adds a test
> to check the error is gracefully returned to the QMP client.
> 
> The last patch can be considered independently. It merges all the
> object-add tests into a single test function and cover new failure
> cases.
> 
> Best Regards
> 
> Eric
> 
> This series can be found at:
> https://github.com/eauger/qemu/tree/qom-graceful-v4
> 
> History:
> - v3 -> v4:
>   - addressed style comment from Markus
>   - added patch 3
> 
> - v2 -> v3:
>   - don't take the object reference on failure in
>     object_property_try_add_child
>   - add g_assert_nonnull(resp) in 2/2 while keeping
>     Thomas A-b
> 
> - v1 -> v2:
>   - use the try terminology.
>   - turn object_property_try_add() into a non-static function
>   - add the test
> 
> 
> Eric Auger (3):
>   qom: Introduce object_property_try_add_child()
>   tests/qmp-cmd-test: Add qmp/object-add-duplicate-id
>   tests/qmp-cmd-test: Add qmp/object-add-failure-modes
> 
>  include/qom/object.h       | 26 +++++++++-
>  qom/object.c               | 21 ++++++--
>  qom/object_interfaces.c    |  7 ++-
>  tests/qtest/qmp-cmd-test.c | 99 ++++++++++++++++++++++++++++++++++++--
>  4 files changed, 140 insertions(+), 13 deletions(-)
> 

Very nice.  I see a failure reported by Patchew, I'll look into it as
well if you don't have time.

Paolo