Bug 1289136

Summary:	launch a vm with macvtap port is not working with kernel < 3.13
Product:	Red Hat OpenStack	Reporter:	Brent Eagles <beagles>
Component:	openstack-neutron	Assignee:	Hynek Mlnarik <hmlnarik>
Status:	CLOSED ERRATA	QA Contact:	Eran Kuris <ekuris>
Severity:	unspecified	Docs Contact:
Priority:	unspecified
Version:	7.0 (Kilo)	CC:	amichayp, amuller, chrisw, ekuris, hmlnarik, mlopes, moshele, nyechiel, srevivo, tfreger
Target Milestone:	---	Keywords:	ZStream
Target Release:	7.0 (Kilo)
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:
Fixed In Version:	openstack-neutron-2015.1.4-4.el7ost	Doc Type:	Bug Fix
Doc Text:	When you create a MacVTap passthrough to SR-IOV VF in Kernel >= 3.13 an `upper_macvtap` symbolic link is created. Previously, for kernel versions < 3.13 the only way to detect the link was by parsing the `ip link show` output. As a result, the MacVTap-assigned VF was not detected on kernel versions < 3.13. With this update, the `ip link show` command now detects MacVTap-assigned VFs, and detection of MacVTap-assigned VFs will work on all kernels.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2016-10-05 19:15:32 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:

Description Brent Eagles 2015-12-07 14:10:16 UTC

Cloned from launchpad bug 1523083.

Description:

the sriov agent check if vf is assigned to macvtap by the exists of upper_macvtap symbolic

https://github.com/openstack/neutron/blob/master/neutron/plugins/ml2/drivers/mech_sriov/agent/eswitch_manager.py#L85-L86

The upper_macvtap symbolic exists only in kernel 3.13 and above
see http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/drivers/net/macvlan.c?id=5831d66e8097aedfa3bc35941cf265ada2352317
"net: create sysfs symlinks for neighbour devices".

This is a problem when using rhel 7.1 which comes with kernel 3.10

Specification URL (additional information):

https://bugs.launchpad.net/neutron/+bug/1523083

Comment 2 Brent Eagles 2015-12-08 20:26:48 UTC

Undoing mistaken version change. This does first occur in OSP 7 (kilo).

Comment 4 Eran Kuris 2016-10-05 06:15:33 UTC

verified on rhos 7 
 [root@compute1 ~]# rpm -qa |grep neutron 
openstack-neutron-openvswitch-2015.1.4-4.el7ost.noarch
openstack-neutron-2015.1.4-4.el7ost.noarch
python-neutronclient-2.4.0-2.el7ost.noarch
openstack-neutron-common-2015.1.4-4.el7ost.noarch
openstack-neutron-lbaas-2015.1.4-1.el7ost.noarch
python-neutron-fwaas-2015.1.2-1.el7ost.noarch
openstack-neutron-fwaas-2015.1.2-1.el7ost.noarch
python-neutron-2015.1.4-4.el7ost.noarch
python-neutron-lbaas-2015.1.4-1.el7ost.noarch

Comment 6 errata-xmlrpc 2016-10-05 19:15:32 UTC

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://rhn.redhat.com/errata/RHBA-2016-2029.html