[Bug 1570093] Re: multipath-tools update introduced syslog messages about partx

[Bug Watch Updater]

** Changed in: multipath-tools (Debian)
       Status: New => Fix Released

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Title:
  multipath-tools update introduced syslog messages about partx

Status in multipath-tools package in Ubuntu:
  Fix Released
Status in multipath-tools source package in Xenial:
  Incomplete
Status in multipath-tools package in Debian:
  Fix Released

Bug description:
  [Impact]

   * During "service multipath-tools start" /sbin/multipath is
     called on dm- devices that are filtered but due to a condition
     conf->dev_type == DEV_DEVNODE in filtering code multipath
     binary wasn't dropping out when hitting a dm- device. This
     was due to the fact that in this case conf->dev_type is
     set to DEV_UEVENT. It also happens during a fail-over event.

     This is causing the logs to be filled with following
     messages:

     multipath: dm-6: failed to get udev uid: Invalid argument
     multipath: dm-6: failed to get sysfs uid: Invalid argument
     multipath: dm-6: failed to get sgio uid: No such file or directory

   * Fix should be backported to xenial to avoid more support
     issues being filed.

   * This change alows the filtering to happen.

  [Test Case]

   * install multipath-tools, create a basic multipath.conf with
     dm- filtering rule. Run: "service multipath-tools start"
     and check the log

  [Regression Potential]

   * There should be no regression potential with this change, the filtering
     only allows the code to not traverse the error path.

  
  [Original Description]

  During a path loss event, the syslog is showing these messages where
  prior to the recent upgrade to multipath-tools I didn't see anything
  like this. To me this seems like either a problem or it seems like a
  print message that should go into a different log file.

  Apr 13 11:21:00 ICTM1618S01H4 systemd-udevd[14861]: Process '/usr/bin/partx -d --nr 1-1024 /dev/sdam' failed with exit code 1.
  ...
  Apr 13 11:21:00 ICTM1618S01H4 multipath: dm-15: failed to get udev uid: Invalid argument
  Apr 13 11:21:00 ICTM1618S01H4 multipath: dm-15: failed to get sysfs uid: Invalid argument
  Apr 13 11:21:00 ICTM1618S01H4 multipath: dm-15: failed to get sgio uid: No such file or directory

  ProblemType: Bug
  DistroRelease: Ubuntu 16.04
  Package: multipath-tools 0.5.0+git1.656f8865-5ubuntu2
  ProcVersionSignature: Ubuntu 4.4.0-18.34-generic 4.4.6
  Uname: Linux 4.4.0-18-generic x86_64
  ApportVersion: 2.20.1-0ubuntu1
  Architecture: amd64
  Date: Wed Apr 13 15:29:36 2016
  SourcePackage: multipath-tools
  UpgradeStatus: No upgrade log present (probably fresh install)

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