[openstack-dev] [zun][unit test] Any python utils can collect pci info?

Hongbin Lu hongbin.lu at huawei.com
Wed Sep 20 16:07:41 UTC 2017


Hi Eric,

Thanks for pointing this out. This BP (https://blueprints.launchpad.net/zun/+spec/use-privsep) was created to track the introduction of privsep.

Best regards,
Hongbin

> -----Original Message-----
> From: Eric Fried [mailto:openstack at fried.cc]
> Sent: September-18-17 10:51 AM
> To: OpenStack Development Mailing List (not for usage questions)
> Subject: Re: [openstack-dev] [zun][unit test] Any python utils can
> collect pci info?
> 
> You may get a little help from the methods in nova.pci.utils.
> 
> If you're calling out to lspci or accessing sysfs, be aware of this
> series [1] and do it via the new privsep mechanisms.
> 
> [1]
> https://review.openstack.org/#/q/status:open+project:openstack/nova+bra
> nch:master+topic:hurrah-for-privsep
> 
> On 09/17/2017 09:41 PM, Hongbin Lu wrote:
> > Hi Shunli,
> >
> >
> >
> > I am not aware of any prevailing python utils for this. An
> alternative
> > is to shell out Linux commands to collect the information. After a
> > quick search, it looks xenapi [1] uses “lspci -vmmnk” to collect PCI
> > device detail info and “ls /sys/bus/pci/devices/<pci_device>/” to
> > detect the PCI device type (PF or VF). FWIW, you might find it
> helpful
> > to refer the implementation of Nova’s xenapi driver for gettiing PCI
> resources [2].
> > Hope it helps.
> >
> >
> >
> > [1]
> > https://github.com/openstack/os-
> xenapi/blob/master/os_xenapi/dom0/etc/
> > xapi.d/plugins/xenhost.py#L593
> >
> > [2]
> >
> https://github.com/openstack/nova/blob/master/nova/virt/xenapi/host.py
> > #L154
> >
> >
> >
> > Best regards,
> >
> > Hongbin
> >
> >
> >
> > *From:*Shunli Zhou [mailto:shunli6658 at gmail.com]
> > *Sent:* September-17-17 9:35 PM
> > *To:* openstack-dev at lists.openstack.org
> > *Subject:* [openstack-dev] [zun][unit test] Any python utils can
> > collect pci info?
> >
> >
> >
> > Hi all,
> >
> >
> >
> > For
> > https://blueprints.launchpad.net/zun/+spec/support-
> pcipassthroughfilte
> > r this BP, Nova use the libvirt to collect the PCI device info. But
> > for zun, libvirt seems is a heavy dependecies. Is there a python
> utils
> > that can be used to collect the PCI device detail info? Such as the
> > whether it's a PF of network pci device of VF, the device
> > capabilities, etc.
> >
> >
> >
> > Note: For 'lspci -D -nnmm' , there are some info can not get.
> >
> >
> >
> >
> >
> > Thanks
> >
> >
> >
> >
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