[Bug 1686784] Re: no predictable names for platform (non-PCI) NICs

[Adam Conrad]

Hello dann, or anyone else affected,

Accepted systemd into xenial-proposed. The package will build now and be
available at https://launchpad.net/ubuntu/+source/systemd/229-4ubuntu19
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 and change the tag from
verification-needed-xenial to verification-done-xenial. If it does not
fix the bug for you, please add a comment stating that, and change the
tag to verification-failed-xenial. In either case, details of your
testing will help us make a better decision.

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

** Tags removed: verification-done verification-done-xenial
** Tags added: verification-needed verification-needed-xenial

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https://bugs.launchpad.net/bugs/1686784

Title:
  no predictable names for platform (non-PCI) NICs

Status in systemd package in Ubuntu:
  Fix Released
Status in systemd source package in Xenial:
  Fix Committed
Status in systemd source package in Yakkety:
  In Progress
Status in systemd source package in Zesty:
  Fix Released

Bug description:
  [Impact]
  Systems may have NICs attached to the "platform" bus. These are NICs that are onboard, but not attached to a PCI(-like) bus. Rather, they are described by firmware directly. None of the naming policies enabled by Ubuntu by default matches these NICs, so they end up having unpredictable names. In the case where other NICs are attached (e.g. PCIe cards), the ethN enumeration race occurs, making it impossible to have an interface name that is persistent across reboots. That is, if you do a network install over "eth0", on reboot that NIC now maybe "eth3", which causes it to fail to start the network on boot.

  The HiSilicon D05 boards are an example of this. It has 4 onboard NICs
  that are described by ACPI directly, and may also have other PCIe NICs
  plugged in.

  [Test Case]
  Boot a system with the characteristics described above, and check to see if any "ethN" interfaces exist.

  [Regression Risk]
  Unless one fixed the names locally with .netlink / .rules files the interface names will change for the ACPI/platform bus network interfaces, from random ethX names to stable names named like enaVENDORMODELiX. Thus we should check that this update doesn't negatively break certified ARM64 platforms with: ARM, NVIDIA, HISILICON platform bus ethernet devices.

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