[Bug 280421] Re: ethtool not available in post-ifup script

[Serge Hallyn]

** Description changed:

+ =======================================================
+ SRU Justification:
+ 
+ 1. Impact: users who have /usr on a separate, remote, slow filesystem, may find that ethtool does not exist when ethtool's ifup.d rules fire.
+ 2. How bug was addressed: ethtool was moved from /usr/sbin to /sbin
+ 3. Minimal patch: http://bazaar.launchpad.net/~ubuntu-branches/ubuntu/maverick/ethtool/maverick/revision/12
+ 4. To reproduce: put /usr on a slow (i.e. remote NFS mounted) filesystem, install ethtool on a system using it.
+ 5. Regression potential: This fix has been applied in maverick and natty with no ill effects.  If users have custom scripts calling /usr/sbin/ethtool by its full path, those might now fail since we do not provide an automatic link.
+ 
+ =======================================================
+ 
  Binary package hint: ethtool
  
  PROBLEM:
  
  I am running Ubuntu 8.04 in a Xen DomU.
  
  To fix network performance issues, the line "post-up  /usr/sbin/ethtool
  -K eth0 tx off" is needed for the virtual ethernet device within the
  /etc/network/intefaces file.
  
  Usually this works fine, however if /usr is stored on its own partition
  this command fails, as /usr is not yet mounted when udev executes ifup
  for the ethernet device.
  
  Unfortunately this causes some very strange errors like
  "/etc/init.d/networking stop" to fail bacause the eth0 interface is
  brought up but not correctly registered in the state file.
  
  The only workaround at the moment is to disable the ifup / ifdown hooks
  in /etc/udev/rules.d/85-ifupdown.rules.
  
  PROPOSED SOLUTION:
  
  The best solution would be moving /usr/sbin/ethtool to /sbin/ethtool so
  that it is available on startup before /usr has been mounted.

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https://bugs.launchpad.net/bugs/280421

Title:
  ethtool not available in post-ifup script