[usbip-devel] USBIP as a audio card server

[James G. <ja...@ma...>]

I'm experimenting with USBIP as a server for USB audio interfaces for virtual machines running on XenServer.

As a proof of concept I loaded up a laptop with Ubuntu Server 16.04 and created a XenServer VM running Ubuntu 16.04 desktop.  Both systems are running USBIP-tools 2.0  (Kernel version 4.4.0-21).  On the "server" I plugged a cheap USB sound card (Bus 003 Device 002: ID 1b3f:2007 Generalplus Technology Inc.) which I was able to export and connect to from the XenServer VM.  This technically works which is promising.  Unfortunately the guest VM is spewing an obscene amount of logs:

rw-r----- 1 syslog            adm  207259334 Jul 12 08:46 syslog

That's less than an hour and the log file contains the same line over and over.

Jul 12 07:53:13 streambox kernel: [219069.566757] vhci_hcd: Not yet implemented
Jul 12 07:53:13 streambox kernel: [219069.571845] vhci_hcd: Not yet implemented
Jul 12 07:53:13 streambox kernel: [219069.571850] vhci_hcd: Not yet implemented
Jul 12 07:53:13 streambox kernel: [219069.576857] vhci_hcd: Not yet implemented
Jul 12 07:53:13 streambox kernel: [219069.576864] vhci_hcd: Not yet implemented
Jul 12 07:53:13 streambox kernel: [219069.581840] vhci_hcd: Not yet implemented
Jul 12 07:53:13 streambox kernel: [219069.581843] vhci_hcd: Not yet implemented
Jul 12 07:53:13 streambox kernel: [219069.581844] vhci_hcd: Not yet implemented


This is obviously not a good thing.

On the server side, I need the USBIPD server to start on boot and always export the same group of devices. To do so should be something like a script in /etc/init.d but it seems that USBIPD needs to be run as root?

Any ideas on what's going on with the logging or how I can properly startup USBIPD?

Thanks,

James