[Bug 655145] Re: net-device-added ($INTERFACE=lo) event missed

[Ricardo Salveti]

** Changed in: upstart (Ubuntu)
       Status: New => Confirmed

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https://bugs.launchpad.net/bugs/655145

Title:
  net-device-added ($INTERFACE=lo) event missed

Status in “upstart” package in Ubuntu:
  Confirmed

Bug description:
  Binary package hint: upstart

  This bug report was originally posted as a comment to bug #497299
  (https://bugs.launchpad.net/ubuntu/+source/ifupdown/+bug/497299/comments/98).

  Problem exists on one of machines with Lucid 10.04.1.

  upstart 0.6.5-7
  ifupdown 0.6.8ubuntu29.1

  It seams that the "net-device-added" event that should have come from
  upstart-udev-bridge (caused by a udev event) gets lost somewhere.

  In a udev logfile there is:
  KERNEL[1285595950.929353] add /devices/virtual/net/lo (net)
  UDEV_LOG=3
  ACTION=add
  DEVPATH=/devices/virtual/net/lo
  SUBSYSTEM=net
  INTERFACE=lo
  IFINDEX=1
  SEQNUM=1477

  UDEV [1285595951.133203] add /devices/virtual/net/lo (net)
  UDEV_LOG=3
  ACTION=add
  DEVPATH=/devices/virtual/net/lo
  SUBSYSTEM=net
  INTERFACE=lo
  IFINDEX=1
  SEQNUM=1477

  But system load hangs at network-interface.conf waiting for net-
  device-added.

  As it was said (for example bug #543506), one can do one of at least 3 things to continue the process:
  1) telinit 2
  2) initctl emit -n net-device-up IFACE=lo LOGICAL=lo ADDRFAM=inet METHOD=loopback
  3) initctl emit net-device-added INTERFACE=lo

  But there is one more thing that works:
  udevadm trigger
  This one seams to replay udev events and net-device-added is noticed.

  So for me the most interesting part is to find out why upstart-udev-
  bridge or upstart loses some events.

  As an additional project I've created an upstart start map generator: https://bitbucket.org/wodny/upstart-map
  Results attached.

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