group.of.nepali.translators team mailing list archive

[Martin Pitt <martin.pitt@xxxxxxxxxx>]

Public bug reported:

Originally from https://bugs.debian.org/812575: Our current
/lib/systemd/network/90-mac-for-usb.link assigns MAC-based names to all
USB devices. However, this is wrong and pointless for locally
administered MAC addresses (with the second bit set to '1', see
https://en.wikipedia.org/wiki/MAC_address#Address_details).

The old 75-persistent-net generator had this rule:

   ENV{MATCHADDR}=="?[2367abef]:*",        ENV{MATCHADDR}=""

which ignored these devices. We need to adjust 90-mac-for-usb.link to do
the same, and only apply to universally administered MAC addresses (at
least until https://lists.ubuntu.com/archives/ubuntu-
devel/2016-April/039302.html gets concluded).

We should simply fall through the default policy of assigning location
based names. The kernel assigned ones have no meaning whatsoever, so
this at least provides name stability for use cases where you can rely
on plugging the device into the same port.

** Affects: systemd (Ubuntu)
     Importance: High
     Assignee: Martin Pitt (pitti)
         Status: Triaged

** Affects: systemd (Ubuntu Xenial)
     Importance: High
     Assignee: Martin Pitt (pitti)
         Status: Triaged

** Affects: systemd (Ubuntu Yakkety)
     Importance: High
     Assignee: Martin Pitt (pitti)
         Status: Triaged

** Affects: systemd (Debian)
     Importance: Unknown
         Status: Unknown

** Changed in: systemd (Ubuntu)
     Assignee: (unassigned) => Martin Pitt (pitti)

** Changed in: systemd (Ubuntu)
       Status: New => Triaged

** Changed in: systemd (Ubuntu)
   Importance: Undecided => High

** Also affects: systemd (Ubuntu Yakkety)
   Importance: High
     Assignee: Martin Pitt (pitti)
       Status: Triaged

** Also affects: systemd (Ubuntu Xenial)
   Importance: Undecided
       Status: New

** Changed in: systemd (Ubuntu Xenial)
       Status: New => Triaged

** Changed in: systemd (Ubuntu Xenial)
   Importance: Undecided => High

** Changed in: systemd (Ubuntu Xenial)
     Assignee: (unassigned) => Martin Pitt (pitti)

** Bug watch added: Debian Bug tracker #812575
   http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=812575

** Also affects: systemd (Debian) via
   http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=812575
   Importance: Unknown
       Status: Unknown

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https://bugs.launchpad.net/bugs/1574483

Title:
  assigns MAC-based names for devices with locally administered MAC
  address

Status in systemd package in Ubuntu:
  Triaged
Status in systemd source package in Xenial:
  Triaged
Status in systemd source package in Yakkety:
  Triaged
Status in systemd package in Debian:
  Unknown

Bug description:
  Originally from https://bugs.debian.org/812575: Our current
  /lib/systemd/network/90-mac-for-usb.link assigns MAC-based names to
  all USB devices. However, this is wrong and pointless for locally
  administered MAC addresses (with the second bit set to '1', see
  https://en.wikipedia.org/wiki/MAC_address#Address_details).

  The old 75-persistent-net generator had this rule:

     ENV{MATCHADDR}=="?[2367abef]:*",        ENV{MATCHADDR}=""

  which ignored these devices. We need to adjust 90-mac-for-usb.link to
  do the same, and only apply to universally administered MAC addresses
  (at least until https://lists.ubuntu.com/archives/ubuntu-
  devel/2016-April/039302.html gets concluded).

  We should simply fall through the default policy of assigning location
  based names. The kernel assigned ones have no meaning whatsoever, so
  this at least provides name stability for use cases where you can rely
  on plugging the device into the same port.

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