Hello Andrea, or anyone else affected,

Accepted iproute2 into oracular-proposed. The package will build now and
be available at
https://launchpad.net/ubuntu/+source/iproute2/6.10.0-2ubuntu1 in a few
hours, and then in the -proposed repository.

Please help us by testing this new package.  See
https://wiki.ubuntu.com/Testing/EnableProposed for documentation on how
to enable and use -proposed.  Your feedback will aid us getting this
update out to other Ubuntu users.

If this package fixes the bug for you, please add a comment to this bug,
mentioning the version of the package you tested, what testing has been
performed on the package and change the tag from verification-needed-
oracular to verification-done-oracular. If it does not fix the bug for
you, please add a comment stating that, and change the tag to
verification-failed-oracular. In either case, without details of your
testing we will not be able to proceed.

Further information regarding the verification process can be found at
https://wiki.ubuntu.com/QATeam/PerformingSRUVerification .  Thank you in
advance for helping!

N.B. The updated package will be released to -updates after the bug(s)
fixed by this package have been verified and the package has been in
-proposed for a minimum of 7 days.

** Changed in: iproute2 (Ubuntu Oracular)
       Status: In Progress => Fix Committed

** Tags added: verification-needed verification-needed-oracular

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https://bugs.launchpad.net/bugs/2064508

Title:
  re-enable Ubuntu FAN in the Noble kernel

Status in iproute2 package in Ubuntu:
  Fix Committed
Status in linux package in Ubuntu:
  In Progress
Status in iproute2 source package in Noble:
  Invalid
Status in linux source package in Noble:
  Fix Released
Status in iproute2 source package in Oracular:
  Fix Committed
Status in linux source package in Oracular:
  In Progress

Bug description:
  [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 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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