[libvirt] virStream: this function is not supported by the connection driver

[Michal Privoznik]

On 30.01.2016 19:59, Wido den Hollander wrote:
> Hi,
> 
> I'm trying to implement the volUpload and volDownload functions for the
> RBD storage driver but I keep getting this:
> 
> 2016-01-30 18:56:11.675+0000: 6447: debug :
> virStorageBackendRBDVolDownload:1395 : Read 4096 bytes at offset 0 from
> RBD image libvirt/wido1
> 
> 2016-01-30 18:56:11.675+0000: 6447: debug : virStreamSend:168 :
> stream=0x7fe780000930, data=0x7fe780062df0, nbytes=4096
> 
> 2016-01-30 18:56:11.675+0000: 6447: error : virStreamSend:186 : this
> function is not supported by the connection driver: virStreamSend
> 
> I reference to the stream with virStreamRef(stream); and then I use
> virStreamSend() to write data to the stream, but that fails.
> 
> I've looked through the source and couldn't find anything what might be
> the issue.
> 
> Libvirt is running locally on my system and I'm using qemu:///system to
> connect locally with virsh.
> 
> Do I need to initialize the stream in any way before I can write data to it?

Interesting, seems like all virStream drivers have implemented Send()
and Recv() (what's the point in having them if they haven't, right?).
How are you creating the stream? You know that you need to create the
stream on both client and server side, right?

Michal