[Libosinfo] [osinfo-db PATCH] RFC: schema: Add support to Guest Features

[Cole Robinson]

On 11/15/2018 06:04 AM, Fabiano Fidêncio wrote:
> One of the requests that came from KubeVirt is that would be really nice
> if we could expose Guest supported features.
> 
> In order to do so, I came up with this *prototype* and I'd like to ask
> for some review of the schema before I actually start implementing
> something on libosinfo side.
> 
> One example of how it'll look like is:
> <os>
>    <features>
>      <feature removed="true">device-hotplug</feature>
>      <feature>cpu-hotplug</feature>
>      <feature>NUMA</feature>
>    </features>
> </os>
> 
>>From the start:
> - features *will* be inrited between OSes, by default.
> - the feature element has an optional "removed" attribute which, by
> default, is "false".
> 
> Is this approach okay?
> 

ACK, this looks like what I imagined as well. It will work like 
<devices> but just advertises unique string values. The main thing for 
us will be to thoroughly document the semantics of each string value.

The term 'feature' is kinda misleading because I can see this 
functionality being used to advertise anti-features, like an OS bug that 
affects guest config. I listed some cases here[1]. But I can't think of 
anything better, and I doubt there's any single term that can cover all 
possible usages of this functionality without being meaningless, so I'm 
cool with 'feature'

[1]: https://www.redhat.com/archives/libosinfo/2018-September/msg00002.html

- Cole