Re: [libvirt] How to use a Virtio-serial port
On 15.05.2012 09:06, Pankaj Rawat wrote:
Hi all,
I want to use virtio-serial
For this I changes my guest xml
<channel type='pty'>
<target type='virtio'
name='arbitrary.virtio.serial.port.name'/>
</channel>
This create a virtio port in guest as follow
# ls -l /dev/virtio-ports/
lrwxrwxrwx. 1 root root 11 May 15 02:59
arbitrary.virtio.serial.port.name -> ../vport0p1
Now I want to use this port
What type of application use this port for communication and how can I
use it ?
When you start your domain and then dump its XML it will look like this:
<channel type='pty'>
<source path='/dev/pts/12'/>
<target type='virtio'
name='arbitrary.virtio.serial.port.name'/>
<alias name='channel0'/>
<address type='virtio-serial' controller='0' bus='0'
port='2'/>
</channel>
So one end of the channel is inside the domain under
/dev/virtio-ports/arbitrary.virtio.serial.port.name and the other one is
under /dev/pts/12 in the host. Therefore running:
(guest) cat /dev/virtio-ports/arbitrary.virtio.serial.port.name
(host) echo "Hello world" > /dev/pts/12
will do all the magic. You can use any tool that is able to work with
unix domain sockets. I personally use socat [1].
1: http://www.dest-unreach.org/socat/
Regards
Pankaj Rawat
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