query dirty areas according to bitmap via QMP or qemu-nbd

[Fiona Ebner]

Hi,

sorry if I'm missing the obvious, but is there a way to get the dirty
areas according to a dirty bitmap via QMP? I mean as something like
offset + size + dirty-flag triples. In my case, the bitmap is also
exported via NBD, so same question for qemu-nbd being the client.

I can get the info with "nbdinfo --map", but would like to avoid
requiring a tool outside QEMU.

If it is not currently possible, would upstream be interested too in the
feature, either for QMP or qemu-nbd?

Best Regards,
Fiona