One-way dbus properties

[Deepak Kodihalli]

On 24/04/19 8:47 PM, Adriana Kobylak wrote:
> Wanted to get thoughts on how attempting to clear one-way dbus 
> properties should be handled.
> 
> There are some properties like Field Mode that are intended to be 
> one-way, meaning that you can set them but not clear them:
> 
> - 
> https://github.com/openbmc/phosphor-dbus-interfaces/blob/master/xyz/openbmc_project/Control/FieldMode.interface.yaml 
> 
>        description: >
>            Keeps track of whether the BMC is in field mode. Enabling 
> field mode
>            is intended to be a one-way operation.
> 
> If there's a call to clear the property value, currently this is a no-op 
> and the REST call returns success but the value is not changed.
> Should an error be returned to the user?

I think an error (NotAllowed) should be thrown back.

Thanks,
Deepak