This bug was fixed in the package libnl3 - 3.2.21-1ubuntu4
---------------
libnl3 (3.2.21-1ubuntu4) trusty; urgency=high
[ Jorge Niedbalski ]
* d/p/lib-nl-Increase-receive-buffer-size-to-4-pages.patch: Increase
receive buffer size to 4 pages by default. (LP: #1567578).
-- Louis Bouchard <louis.bouch...@ubuntu.com> Mon, 24 Oct 2016
16:26:30 +0200
** Changed in: libnl3 (Ubuntu Trusty)
Status: Fix Committed => Fix Released
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https://bugs.launchpad.net/bugs/1567578
Title:
libnl should be updated to support up to 63 VFs per single PF
Status in libnl3 package in Ubuntu:
Fix Released
Status in libnl3 source package in Precise:
New
Status in libnl3 source package in Trusty:
Fix Released
Bug description:
[Impact]
libnl can only enable up to 30 VFs even if the PF supports up to 63
VFs in an Openstack SRIOV configuration.
As already documented in https://bugs.launchpad.net/mos/+bug/1501738
there is a bug in the default libnl library release installed on
Ubuntu 14.04.4.
When trying to enable a guest with more than 30 VFs attached, the
following error is returned:
error: Failed to start domain guest1
error: internal error: missing IFLA_VF_INFO in netlink response
[Test Case]
1) Edit /etc/default/grub.
GRUB_CMDLINE_LINUX="intel_iommu=on ixgbe.max_vfs=63"
2) Update grub and reboot the machine.
$ sudo update-grub
3) Check that the virtual functions are available.
$ sudo lspci|grep -i eth | grep -i virtual | wc -l
126
4) Create a KVM guest.
$ sudo uvt-kvm create guest1 release=trusty
5) List the VF devices.
$ sudo lspci|grep -i eth | grep -i virtual | awk '{print $1}' | sed
's/\:/\_/g' | sed 's/\./\_/g' > devices.txt
6) Get the libvirt node device.
$ sudo for device in $(cat ./devices.txt); do virsh nodedev-list |
grep $device; done > pci_devices.txt
7) Generate the XML config for each device.
$ sudo mkdir devices && for d in $(cat pci_devices.txt); do virsh
nodedev-dumpxml $d > devices/$d.xml; done
8) Save and Run the following script.
(http://pastebin.ubuntu.com/23374186/)
$ sudo python generate-interfaces.py |grep address | wc -l
9) Finally attach the devices to the guest.
$ sudo for i in $(seq 0 63); do virsh attach-device guest1
./interfaces/$i.xml --config; done
Device attached successfully
[...]
Device attached successfully
Device attached successfully
10) Then destroy/start the guest again, at this point the error is
reproduced.
$ sudo virsh destroy guest1
Domain guest1 destroyed
$ sudo virsh start guest1
error: Failed to start domain guest1
error: internal error: missing IFLA_VF_INFO in netlink response
[Regression Potential]
* None identified.
[Other Info]
* Redhat Bug: https://bugzilla.redhat.com/show_bug.cgi?id=1040626
* A workaround is to install a newer library release.
$ wget
https://launchpad.net/ubuntu/+archive/primary/+files/libnl-3-200_3.2.24-2_amd64.deb
$ wget
https://launchpad.net/ubuntu/+archive/primary/+files/libnl-genl-3-200_3.2.24-2_amd64.deb
$ wget
https://launchpad.net/ubuntu/+archive/primary/+files/libnl-route-3-200_3.2.24-2_amd64.deb
$ dpkg -i libnl-3-200_3.2.24-2_amd64.deb
$ dpkg -i libnl-genl-3-200_3.2.24-2_amd64.deb
$ dpkg -i libnl-route-3-200_3.2.24-2_amd64.deb
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