[ovs-dev] Cannot open /dev/vfio/noiommu-0: Permission denied
Aaron Conole
aconole at redhat.com
Mon May 7 13:39:26 UTC 2018
Leon Goldberg <lgoldber at redhat.com> writes:
> On Fri, May 4, 2018 at 10:19 PM, Aaron Conole <aconole at redhat.com> wrote:
>
> Leon Goldberg <lgoldber at redhat.com> writes:
>
> > Hi list,
> >
> > I'm trying to integrate ovs-dpdk into oVirt. For testing purposes, I'm
> > writing a test that looks to run a VM on top of a dpdk port.
> >
> > The testing environment consists of nested virtualization:
> >
> > Physical machine -> Jenkins CI VM -> Target VM
> >
> > The test merely looks to see that the various components are properly
> > configured for the real world. For that purpose, I'm using NOIOMMU mode of
> > VFIO.
> >
> > The select virtio device fails to to be attached to dpdk, and I suspect it
> > is due to $subject.
> >
> > Here are the CI logs[1]. I see some other red lights, but $subject seems
> > the brightest.
>
> Can you provide:
>
> $ ps aux | grep ovs-vswitchd
> $ ls -lah /dev/vfio
>
> Hey Aaron,
>
> Here it is:
>
> [root at lago-network-suite-master-host-0 ~]# ps aux | grep ovs-vswitchd
> openvsw+ 840 0.6 6.2 1273732 116716 ? S<Lsl 07:28 0:10 ovs-vswitchd
> unix:/var/run/openvswitch/db.sock -vconsole:emer -vsyslog:err -vfile:info --mlockall --user
> openvswitch:hugetlbfs --no-chdir --log-file=/var/log/openvswitch/ovs-vswitchd.log
> --pidfile=/var/run/openvswitch/ovs-vswitchd.pid --detach
> root 4425 0.0 0.0 112660 976 pts/0 R+ 07:55 0:00 grep --color=auto ovs-vswitchd
>
> [root at lago-network-suite-master-host-0 ~]# ls -lah /dev/vfio
> total 0
> drwxr-xr-x. 2 root root 80 May 6 07:28 .
> drwxr-xr-x. 19 root root 3.2K May 6 07:28 ..
> crw-rw----. 1 root hugetlbfs 244, 0 May 6 07:28 noiommu-0
> crw-rw-rw-. 1 root root 10, 196 May 6 07:28 vfio
Okay - that looks like it should be okay.
Can you check if there are any selinux violations in audit.log
(specifically from the openvswitch_t domain)? Maybe there is a missing
selinux policy directive.
> Just want to see if there's a disconnect between the userid for ovs
> and the permissions on the vfio file. If that's the case, we may need
> to update the vfio rules.
>
> > Any tips will be greatly appreciated!
> >
> > Thanks,
> > Leon
> >
> > [1]
> >
> http://jenkins.ovirt.org/job/ovirt-system-tests_standard-check-patch/642/artifact/exported-artifacts/check-patch.network_suite_master.el7.x86_64/tests.test_dpdk/lago-network-suite-master-host-0/_var_log/openvswitch/ovs-vswitchd.log
>
> >
> <http://jenkins.ovirt.org/job/ovirt-system-tests_standard-check-patch/642/artifact/exported-artifacts/check-patch.network_suite_master.el7.x86_64/tests.test_dpdk/lago-network-suite-master-host-0/_var_log/openvswitch/ovs-vswitchd.log>
>
> > _______________________________________________
> > dev mailing list
> > dev at openvswitch.org
> > https://mail.openvswitch.org/mailman/listinfo/ovs-dev
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