[Bug 1497108] Re: Long paths are not handled correctly when deleting partition mappings

[Snappy Tarmac]

** Changed in: snapcraft
       Status: In Progress => Fix Committed

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https://bugs.launchpad.net/bugs/1497108

Title:
  Long paths are not handled correctly when deleting partition mappings

Status in Snapcraft:
  Fix Committed
Status in multipath-tools package in Ubuntu:
  New

Bug description:
  The bug seems to be in kpartx and long path handling
  sergiusens at lindon:~/source/launchpad.net/snapcraft$ cd /
  sergiusens at lindon:/$ sudo kpartx -avs ^C
  sergiusens at lindon:/$ sudo losetup -a
  [sudo] password for sergiusens: 
  sergiusens at lindon:/$ sudo kpartx -avs /home/sergiusens/source/launchpad.net/snapcraft/examples/godd/images/15.04.img 
  add map loop0p1 (252:0): 0 8192 linear /dev/loop0 8192
  add map loop0p2 (252:1): 0 131072 linear /dev/loop0 16384
  add map loop0p3 (252:2): 0 2097152 linear /dev/loop0 147456
  add map loop0p4 (252:3): 0 2097152 linear /dev/loop0 2244608
  add map loop0p5 (252:4): 0 3272704 linear /dev/loop0 4341760
  sergiusens at lindon:/$ sudo losetup -a
  /dev/loop0: [2050]:7872194 (/home/sergiusens/source/launchpad.net/snapcraft/examples/godd/images/15.04.img)
  sergiusens at lindon:/$ sudo kpartx -ds /home/sergiusens/source/launchpad.net/snapcraft/examples/godd/images/15.04.img 
  sergiusens at lindon:/$ sudo losetup -a
  /dev/loop0: [2050]:7872194 (/home/sergiusens/source/launchpad.net/snapcraft/examples/godd/images/15.04.img)

  
  What follows is the snapcraft specific report
  When I run snapcraft run, it boots the snappy kvm but leaves two loop devices behind:

  $ losetup -a
  /dev/loop0: []: (/home/elopio/workspace/canonical/snapcraft/trunk/examples/downloader-with-wiki-parts/image/15.04.img)
  /dev/loop1: []: (/home/elopio/workspace/canonical/snapcraft/trunk/examples/downloader-with-wiki-parts/image/15.04.img)

  Tested in vivid and wily

  To reproduce:
  bzr branch lp:snapcraft
  cd snapcraft
  cd examples/downloader-with-wiki-parts
  ./../../bin/snapcraft assemble
  ./../../bin/snapcraft run

  $ apt-cache policy ubuntu-device-flash
  ubuntu-device-flash:
    Instalita: 0.31-0ubuntu1
    Kandidato: 0.31-0ubuntu1
    Version table:
   *** 0.31-0ubuntu1 0
          500 http://ppa.launchpad.net/snappy-dev/tools-proposed/ubuntu/ vivid/main amd64 Packages
          500 http://ppa.launchpad.net/snappy-dev/tools/ubuntu/ vivid/main amd64 Packages
          100 /var/lib/dpkg/status
       0.20-0ubuntu1 0
          500 http://cr.archive.ubuntu.com/ubuntu/ vivid/universe amd64 Packages

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