I am looking to be able to check if a specific PCI device is allocated to a guest. An error is produced if a domain is started and the device is in use within another domain via this function. I cannot see a publicly available function to use to get this information, is there one available or is there another way to check the state of the PCI device. Regards Simon
On 5/17/21 8:36 PM, Simon Fairweather wrote:
I am looking to be able to check if a specific PCI device is allocated to a guest.
An error is produced if a domain is started and the device is in use within another domain via this function.
I cannot see a publicly available function to use to get this information, is there one available or is there another way to check the state of the PCI device.
Yeah, there's no public API. So far we recommended mgmt apps to track the usage themselves, however I don't see why we shouldn't have a new API, say: int virNodeDeviceGetUsed(virNodeDevicePtr dev, char **drvname, char **domname); Can you please open a gitlab issue for this? Or, are you willing to submit patches? Michal
Thanks, I will raise an issue and look to see if I can raise a patch. Regards Simon On Wed, May 19, 2021 at 11:38 AM Michal Prívozník <mprivozn@redhat.com> wrote:
On 5/17/21 8:36 PM, Simon Fairweather wrote:
I am looking to be able to check if a specific PCI device is allocated to a guest.
An error is produced if a domain is started and the device is in use within another domain via this function.
I cannot see a publicly available function to use to get this information, is there one available or is there another way to check the state of the PCI device.
Yeah, there's no public API. So far we recommended mgmt apps to track the usage themselves, however I don't see why we shouldn't have a new API, say:
int virNodeDeviceGetUsed(virNodeDevicePtr dev, char **drvname, char **domname);
Can you please open a gitlab issue for this? Or, are you willing to submit patches?
Michal
On 5/19/21 1:38 PM, Simon Fairweather wrote:
Thanks, I will raise an issue and look to see if I can raise a patch.
Regards Simon
On Wed, May 19, 2021 at 11:38 AM Michal Prívozník <mprivozn@redhat.com> wrote:
On 5/17/21 8:36 PM, Simon Fairweather wrote:
I am looking to be able to check if a specific PCI device is allocated to a guest.
An error is produced if a domain is started and the device is in use within another domain via this function.
I cannot see a publicly available function to use to get this information, is there one available or is there another way to check the state of the PCI device.
Yeah, there's no public API. So far we recommended mgmt apps to track the usage themselves, however I don't see why we shouldn't have a new API, say:
int virNodeDeviceGetUsed(virNodeDevicePtr dev, char **drvname, char **domname);
Just a note - of course I forgot the mandatory flags argument, so this can be: int virNodeDeviceGetUsed(virNodeDevicePtr dev, char **drvname, char **domname, unsigned int flags); Even though we don't have any flags to pass yet the argument needs to be there as it ensures future extension. In general this is a good start: https://libvirt.org/api_extension.html Michal
participants (2)
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Michal Prívozník -
Simon Fairweather