Before back porting commit bd1903b7c4596 ("net: openvswitch: add hash info to upcall"), a couple points should be addressed: - xenial backport is skipping one netlink attribute, which will introduce an ABI incompatibility - Needs a test case
Submission and conversation on the kernel mailing list can be found here: https://lists.ubuntu.com/archives/kernel-team/2020-May/109666.html ** Changed in: linux (Ubuntu Xenial) Status: New => Incomplete ** Changed in: linux (Ubuntu Bionic) Status: New => Incomplete ** Changed in: linux (Ubuntu Eoan) Status: New => Incomplete ** Changed in: linux (Ubuntu Focal) Status: New => Incomplete -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1860986 Title: openvswitch: same tcp session encapsulated with different udp src port for ovs vxlan tunnel Status in linux package in Ubuntu: Incomplete Status in linux source package in Xenial: Incomplete Status in linux source package in Bionic: Incomplete Status in linux source package in Eoan: Incomplete Status in linux source package in Focal: Incomplete Bug description: [SRU Justification] [Impact] Packets encapsulated into a vxlan tunnel with openvswitch don't have the same udp source port for the first packet and the following ones of the same TCP flow in a DOCKER scenario usecase. In fact, when using the kernel datapath, the upcall don't include skb hash info relatived. As VXLAN module uses the skb hash to select UDP src port, the source port is different for the first packet. More information can be found here: https://mail.openvswitch.org/pipermail/ovs-dev/2019-October/364062.html This has been fixed in v5.5 by the following upstream commit: bd1903b7c4596 ("net: openvswitch: add hash info to upcall") https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/net/openvswitch?id=bd1903b7c4596ba6f7677d0dfefd05ba5876707d The bug exists since the beginning of vxlan support in openvswitch. == Fix == Backport the requested patches to Focal (5.4), Eoan (5.3), Bionic (4.15) and Xenial (4.4). == Risk of Regression == This patch only add hash information when we do upcall, thus the risk should be low. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1860986/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp