** Description changed:

+ [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
+ 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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https://bugs.launchpad.net/bugs/1570093

Title:
  multipath-tools update introduced syslog messages about partx

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