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[Bug 1774225] Re: netns: unable to follow an interface that moves to another netns

To: group.of.nepali.translators@xxxxxxxxxxxxxxxxxxx
From: Joseph Salisbury <joseph.salisbury@xxxxxxxxxxxxx>
Date: Wed, 23 Jan 2019 01:09:12 -0000
Reply-to: Bug 1774225 <1774225@xxxxxxxxxxxxxxxxxx>
Sender: bounces@xxxxxxxxxxxxx

** Changed in: linux (Ubuntu Xenial)
       Status: In Progress => Confirmed

** Changed in: linux (Ubuntu)
       Status: In Progress => Fix Released

** Changed in: linux (Ubuntu Xenial)
     Assignee: Joseph Salisbury (jsalisbury) => (unassigned)

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https://bugs.launchpad.net/bugs/1774225

Title:
  netns: unable to follow an interface that moves to another netns

Status in linux package in Ubuntu:
  Fix Released
Status in linux source package in Xenial:
  Confirmed
Status in linux source package in Bionic:
  Fix Released

Bug description:

  == SRU Justification ==
  6Wind is requesting these three patches. The patches fix a bug that prevents a user
  from following an interface that moves to another netns.

  These commits are also needed in Xenial.  However, they will be sent in
  a separate SRU request due to additional prereq commits being needed for
  Xenial.

  == Fixes ==
  b2d3bcfa26a7 ("net: core: Expose number of link up/down transitions")
  c36ac8e23073 ("dev: always advertise the new nsid when the netns iface changes")
  38e01b30563a ("dev: advertise the new ifindex when the netns iface changes")

  == Regression Potential ==
  Medium due to three patches needed and the changes to core networking. 

  == Test Case ==
  A test kernel was built with these patches and tested by the original bug reporter.
  The bug reporter states the test kernel resolved the bug.





  The following upstream patches are missing (v4.16):

  6621dd29eb9b ("dev: advertise the new nsid when the netns iface changes")
  c36ac8e23073 ("dev: always advertise the new nsid when the netns iface changes")
  38e01b30563a ("dev: advertise the new ifindex when the netns iface changes")

  https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=6621dd29eb9b
  https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=c36ac8e23073
  https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=38e01b30563a

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