[libvirt-users] Virtio serial exposition

[Jean-Pierre Ribeauville]

Hi,



In fact it works fine .

The issue is the following :



Having a look to the source path , via Virtual Machine Manager , I got nothing .





But if I dump the xml file , then I got the pts/x reference :





<channel type='pty'>

      <source path='/dev/pts/2'/>

      <target type='virtio' name='omnivision.virtio.serial.port.name'/>

      <alias name='channel0'/>

      <address type='virtio-serial' controller='0' bus='0' port='1'/>

    </channel>





By using a newer stuff on my second host (  RHEL7 instead of RHEL5) , then , it’s correct also via Virtual Machine  Manager.



Thx for help.



J.P.



-----Message d'origine-----
De : Daniel P. Berrange [mailto:berrange at redhat.com]
Envoyé : jeudi 27 août 2015 12:13
À : Jean-Pierre Ribeauville
Cc : libvirt-users at redhat.com<mailto:libvirt-users at redhat.com>
Objet : Re: [libvirt-users] Virtio serial exposition



On Wed, Aug 26, 2015 at 12:17:20PM +0000, Jean-Pierre Ribeauville wrote:

> Hi,

>

> I try to exchange datas  between host and Guest  by adding these lines in a guest .xml conf file :

>

> <channel type='pty'>

>       <target type='virtio' name='arbitrary.virtio.serial.port.name'/>

>       <address type='virtio-serial' controller='0' bus='0' port='1'/>

>     </channel>

>

>

> Then  /dev/virtio-ports/arbitrary.virtio.serial.port.name is exposed in the guest and a /dev/pts/x  is seen as source path on the host.

>

> I checked that on two Linux hosts :

>

> 1)

>

> libvirt-daemon-driver-qemu-1.2.8-16.el7_1.3.x86_64

> qemu-kvm-1.5.3-86.el7_1.5.x86_64

> qemu-kvm-common-1.5.3-86.el7_1.5.x86_64

> qemu-guest-agent-2.1.0-4.el7.x86_64

> ipxe-roms-qemu-20130517-6.gitc4bce43.el7.noarch

> qemu-img-1.5.3-86.el7_1.5.x86_64

> Linux sparring 3.10.0-229.el7.x86_64 #1 SMP Thu Jan 29 18:37:38 EST

> 2015 x86_64 x86_64 x86_64 GNU/Linux

>

>

> 2)

>

> qemu-img-0.12.1.2-2.415.el6.x86_64

> qemu-kvm-0.12.1.2-2.415.el6.x86_64

> gpxe-roms-qemu-0.9.7-6.10.el6.noarch

>

>

> Linux orion 2.6.32-431.el6.x86_64 #1 SMP Sun Nov 10 22:19:54 EST 2013

> x86_64 x86_64 x86_64 GNU/Linux

>

>

>

> The device is only exposed on the guest of the first host .

>

> Is it due to a too old version of qemu and/or Linux  on the second

> host or some packages  missing on this second host ?



Libvirt should tell you if qemu / host is too old, so sounds like a guest issue instead. Perhaps the guest kernel-module has not been loaded for the second guest ?





Regards,

Daniel

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