[Bug 1929184] Re: [21.10 FEAT] RoCE: Predictable Interface Names - systemd part

[bugproxy]

------- Comment From Boris.mail at de.ibm.com 2021-08-19 06:35 EDT-------
Despite the initial concern because of the amount of fixes, Canonical managed to get this feature (systemd part) into Impish 21.10.
This way, we will have the full functionality of this feature and don't have to add a release note regarding limitations.
Therefore, changing Target Milestone back from 22.04 -> 21.10

** Tags removed: targetmilestone-inin2204
** Tags added: targetmilestone-inin2110

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Title:
  [21.10 FEAT] RoCE: Predictable Interface Names - systemd part

Status in Ubuntu on IBM z Systems:
  Fix Committed
Status in systemd package in Ubuntu:
  Fix Committed

Bug description:
  Feature Description: 	
  - Interface names for RoCE Express adapters are currently very hard to predict, causing problems with the installer which requires knowledge of the interface name
  - Interface names can change between re-boots, invalidating any previously stored network card configuration
  To fix this requires changes in the Linux kernel to indicate whether UIDs are unique (and therefore usable), and in systemd to generate an interface name based on UIDs all the time.

  Business Case: 	
  Increase usability, lower service efforts.

  The code is in the upstream repository and should eventually be
  contained in the upcoming systemd release 249

  a496a23 udev: fix slot based network names on s390
  b08c3fb udev: add missing initialization to fix freeing invalid address
  5a7eb46 udev: allow onboard index up to 65535

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