** Changed in: linux (Ubuntu)
Status: Invalid => Triaged
** Changed in: linux (Ubuntu)
Status: Triaged => In Progress
** Description changed:
[Impact]
In LP: #2063298, we have opted to deprecate Ubuntu FAN support because
of the maintenance overhead and the possibility of regressions /
conflicts with the new networking eBPF APIs in kernels >= 6.8.
However, we cannot disable this feature in HWE/backport kernels, so it
seems safer to adjust the Ubuntu FAN kernel patch set to ensure proper
co-existence with the updated vxlan policy requirements in newer 6.8
kernels.
The re-introduction of Ubuntu FAN should be considered as a temporary
measure, aimed at facilitating a smooth transition during its
deprecation without disrupting existing users (specifically Juju), and
enabling the backporting of 6.8 kernels to older releases.
- The main plan is still to deprecate Ubuntu FAN in newer releases.
+ The main plan is still to deprecate Ubuntu FAN at some point in the
+ future.
[Test case]
Rely on the specific Ubuntu FAN regression test to validate the proper
kernel support of this feature:
https://git.launchpad.net/~canonical-kernel-team/+git/autotest-client-
tests/tree/ubuntu_fan_smoke_test?h=autotest3
[Fix]
Re-apply the Ubuntu FAN patch set to the latest Noble kernel 6.8 and
integrate the IFLA_VXLAN_FAN_MAP attribute type in vxlan_policy to
satisfy the strict length validation check.
[Regression potential]
We may experience regressions with eBPF vxlan capabilities and
potentially specific use cases of the Ubuntu FAN technology (Juju
installations).
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https://bugs.launchpad.net/bugs/2064508
Title:
re-enable Ubuntu FAN in the Noble kernel
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