Public bug reported:
in pci utils the is_physical_function function check it based on existing
virtfn* symbolic link. The check is incorrect because
if the PF doen't enable SR-IOV meaning sriov_numvfs is set to zero there are no
virtfn* ljnks and the nova-compute recognize it as VF.
see:
root@r-ufm160:/opt/stack/logs# ls /sys/bus/pci/devices/0000\:03\:00.0/
broken_parity_status d3cold_allowed enable iommu_group
modalias pools reset sriov_numvfs uevent
class device infiniband irq
msi_bus power resource sriov_totalvfs vendor
commands_cache dma_mask_bits infiniband_cm local_cpulist
msi_irqs real_miss resource0 subsystem vpd
config driver infiniband_mad local_cpus net
remove resource0_wc subsystem_device
consistent_dma_mask_bits driver_override infiniband_verbs mlx5_num_vfs
numa_node rescan sriov subsystem_vendor
root@r-ufm160:/opt/stack/logs# cat
/sys/bus/pci/devices/0000\:03\:00.0/sriov_numvfs
0
root@r-ufm160:/opt/stack/logs# echo 4 >
/sys/bus/pci/devices/0000\:03\:00.0/sriov_numvfs
root@r-ufm160:/opt/stack/logs# ls /sys/bus/pci/devices/0000\:03\:00.0/
broken_parity_status d3cold_allowed enable iommu_group
modalias pools reset sriov_numvfs uevent virtfn3
class device infiniband irq
msi_bus power resource sriov_totalvfs vendor vpd
commands_cache dma_mask_bits infiniband_cm local_cpulist
msi_irqs real_miss resource0 subsystem virtfn0
config driver infiniband_mad local_cpus net
remove resource0_wc subsystem_device virtfn1
consistent_dma_mask_bits driver_override infiniband_verbs mlx5_num_vfs
numa_node rescan sriov subsystem_vendor virtfn2
** Affects: nova
Importance: Undecided
Assignee: Moshe Levi (moshele)
Status: In Progress
** Tags: passthrough pci
** Tags added: pci-passthogth
** Tags removed: pci-passthogth
** Tags added: passthrough pci
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https://bugs.launchpad.net/bugs/1499204
Title:
wrong check for physical function in pci utils
Status in OpenStack Compute (nova):
In Progress
Bug description:
in pci utils the is_physical_function function check it based on existing
virtfn* symbolic link. The check is incorrect because
if the PF doen't enable SR-IOV meaning sriov_numvfs is set to zero there are
no virtfn* ljnks and the nova-compute recognize it as VF.
see:
root@r-ufm160:/opt/stack/logs# ls /sys/bus/pci/devices/0000\:03\:00.0/
broken_parity_status d3cold_allowed enable iommu_group
modalias pools reset sriov_numvfs uevent
class device infiniband irq
msi_bus power resource sriov_totalvfs vendor
commands_cache dma_mask_bits infiniband_cm local_cpulist
msi_irqs real_miss resource0 subsystem vpd
config driver infiniband_mad local_cpus
net remove resource0_wc subsystem_device
consistent_dma_mask_bits driver_override infiniband_verbs mlx5_num_vfs
numa_node rescan sriov subsystem_vendor
root@r-ufm160:/opt/stack/logs# cat
/sys/bus/pci/devices/0000\:03\:00.0/sriov_numvfs
0
root@r-ufm160:/opt/stack/logs# echo 4 >
/sys/bus/pci/devices/0000\:03\:00.0/sriov_numvfs
root@r-ufm160:/opt/stack/logs# ls /sys/bus/pci/devices/0000\:03\:00.0/
broken_parity_status d3cold_allowed enable iommu_group
modalias pools reset sriov_numvfs uevent virtfn3
class device infiniband irq
msi_bus power resource sriov_totalvfs vendor vpd
commands_cache dma_mask_bits infiniband_cm local_cpulist
msi_irqs real_miss resource0 subsystem virtfn0
config driver infiniband_mad local_cpus
net remove resource0_wc subsystem_device virtfn1
consistent_dma_mask_bits driver_override infiniband_verbs mlx5_num_vfs
numa_node rescan sriov subsystem_vendor virtfn2
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https://bugs.launchpad.net/nova/+bug/1499204/+subscriptions
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