[libvirt-users] host to VM serial device configuration

[Daniel P. Berrange]

On Sat, Jan 15, 2011 at 01:09:07AM +1100, Justin Clift wrote:
> On 14/01/2011, at 9:39 PM, Daniel P. Berrange wrote:
> > On Fri, Jan 14, 2011 at 11:50:01AM +0800, Osier Yang wrote:
> >> 于 2011年01月12日 23:11, John Paul Walters 写道:
> >>> Hi,
> >>> 
> >>> I'm trying to get a virtual serial device up and running between my host
> >>> and virtual machine with a device name on the host. I'm using libvirt
> >>> 0.8.3 and qemu 0.13.0. The challenge that I'm running into is that I'm
> >>> able to get a serial device, but I cannot fix it to a pre-defined device
> >>> name. For example, I'm using the following in my VM's xml file:
> >>> 
> >>> <serial type='pty'>
> >>> <source path='/dev/pts/19' />
> >>> <target port='0' />
> >>> </serial>
> >>> 
> >>> As I said this works, but it doesn't set the host side to /dev/pts/19.
> >>> Is there any way to do this?
> >> 
> >> I could reproduce it, trying to find out why.
> > 
> > When using type='type', the source path is an output only
> > attribute. You can't control it yourself, it is autoassigned
> > by the kernel as it sees fit.
> 
> Any idea if it's the kind of thing whose name could be selected or changed
> using udev rules?

No, these aren't normal devices. This is a magic filesystem
which creates entries on the fly.

Daniel