Re: [Qemu-devel] [Nbd] [PATCH v2] doc: Add NBD_CMD_BLOCK_STATUS extension

[Paolo Bonzini]

On 05/04/2016 17:01, Alex Bligh wrote:
>>> >> So qemu-nbdserver has some idea of 'dirtiness', and you want
>>> >> to publish that, and the consumer is qemu (and only qemu),
>>> >> because only qemu knows what 'dirtiness' means in the
>>> >> sense the server provides it?
>> > 
>> > The consumer is not QEMU; the consumer is backup software which is not
>> > part of QEMU (and could even be proprietary, ugh).
> I'm missing how the ugh-author can write the software without knowing
> exactly what the bit does. Or are you saying "that's a matter
> for the qemu spec, not the nbd spec"?

Yes, that's it.  NBD defines a safe default and a general idea of what
it should be used for.

Paolo