Re: [Virtio-fs] [PATCH 08/12] qom: allow for properties to become "fixed"

[Markus Armbruster <armbru@redhat.com>]

Alex Bennée <alex.bennee@linaro.org> writes:

> When specialising general purpose objects it is sometimes useful to
> "fix" some of the properties that were configurable by the base
> classes. We will use this facility when specialising
> vhost-user-device.
>
> Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
> ---
>  qapi/qom.json           |  2 ++
>  include/qom/object.h    | 16 +++++++++++++++-
>  qom/object.c            | 14 ++++++++++++++
>  qom/object_interfaces.c |  9 ++++++---
>  qom/qom-qmp-cmds.c      |  1 +
>  softmmu/qdev-monitor.c  |  1 +
>  6 files changed, 39 insertions(+), 4 deletions(-)
>
> diff --git a/qapi/qom.json b/qapi/qom.json
> index a877b879b9..4cda191f00 100644
> --- a/qapi/qom.json
> +++ b/qapi/qom.json
> @@ -33,12 +33,14 @@
>  # @description: if specified, the description of the property.
>  #
>  # @default-value: the default value, if any (since 5.0)
> +# @fixed: if specified if value has been fixed (since 8.1)

Wat?

>  #
>  # Since: 1.2
>  ##
>  { 'struct': 'ObjectPropertyInfo',
>    'data': { 'name': 'str',
>              'type': 'str',
> +            'fixed': 'bool',
>              '*description': 'str',
>              '*default-value': 'any' } }
>  

qom-list and qom-list-properties return a list of this.  Use cases for
the new member?

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