[Bug 1784347] Comment bridged from LTC Bugzilla

Wed Oct 17 14:19:37 UTC 2018

------- Comment From Kyle.Mahlkuch at ibm.com 2018-10-17 10:12 EDT-------
Thank you for for sponsoring the patch.
I agree that this is not the best fix as there may exist other partition separators but it's the best I could come up with. These were the most common three separators I found so it's at least "better" than the previous code.

-- 
You received this bug notification because you are a member of Ubuntu
Foundations Bugs, which is subscribed to util-linux in Ubuntu.
https://bugs.launchpad.net/bugs/1784347

Title:
  ISST-LTE: KVM:UBUNTU1804: BostonLC: fdisk -l shows the conflicting
  partitions name for the mpath

Status in The Ubuntu-power-systems project:
  Fix Committed
Status in util-linux package in Ubuntu:
  Fix Released
Status in util-linux source package in Bionic:
  Fix Committed

Bug description:

  [Impact]
  Any user of Ubuntu on multipath, where the default path separator has been changed to something else. This possibly affects other scenarios where the partition separator can be changed.

  [Test case]
  1) Install Ubuntu on multipath system
  2) Change /etc/multipath.conf to set "path_separator" to "" or "p".
  3) Reboot
  4) Run 'sudo fdisk -l /dev/mapper/mpathX', to display a device's partitions where the path separator would be visible.

  [Regression potential]
  Minimal. This only affects display. Default separator on Ubuntu remains "-part". If the separator is not one of "", "p", or "-part", then "-part" would be used, as is already the case.

  == Comment: #0 - Chanh H. Nguyen <chnguyen at us.ibm.com> - 2018-01-09 11:14:07 ==
  We have the Ubuntu1804 installed on our BostonLC system. Create a SAN via the Emulex adapter to have the mpath disk.
  Running the fdisk -l and ls -l showing the conflict name for the mpath.

  :~# uname -a
  Linux boslcp4 4.13.0-17-generic #20-Ubuntu SMP Mon Nov 6 10:03:08 UTC 2017 ppc64le ppc64le ppc64le GNU/Linux
  root at boslcp4:~# cat /etc/os-release
  NAME="Ubuntu"
  VERSION="18.04 LTS (Bionic Beaver)"
  ID=ubuntu
  ID_LIKE=debian
  PRETTY_NAME="Ubuntu Bionic Beaver (development branch)"
  VERSION_ID="18.04"
  HOME_URL="https://www.ubuntu.com/"
  SUPPORT_URL="https://help.ubuntu.com/"
  BUG_REPORT_URL="https://bugs.launchpad.net/ubuntu/"
  PRIVACY_POLICY_URL="https://www.ubuntu.com/legal/terms-and-policies/privacy-policy"
  VERSION_CODENAME=bionic
  UBUNTU_CODENAME=bionic

  :~# fdisk -l /dev/mapper/mpatha
  Disk /dev/mapper/mpatha: 600 GiB, 644245094400 bytes, 1258291200 sectors
  Units: sectors of 1 * 512 = 512 bytes
  Sector size (logical/physical): 512 bytes / 512 bytes
  I/O size (minimum/optimal): 32768 bytes / 32768 bytes
  Disklabel type: dos
  Disk identifier: 0xa5be904b

  Device                   Boot     Start        End   Sectors  Size Id Type
  /dev/mapper/mpatha-part1           2048  419432447 419430400  200G 83 Linux
  /dev/mapper/mpatha-part2      419432448  838862847 419430400  200G 83 Linux
  /dev/mapper/mpatha-part3      838862848 1258291199 419428352  200G 83 Linux

  :~# ls -l /dev/mapper/mpatha*
  lrwxrwxrwx 1 root root 7 Jan  9 04:04 /dev/mapper/mpatha -> ../dm-0
  lrwxrwxrwx 1 root root 7 Jan  9 04:03 /dev/mapper/mpatha1 -> ../dm-1
  lrwxrwxrwx 1 root root 7 Jan  9 04:03 /dev/mapper/mpatha2 -> ../dm-2
  lrwxrwxrwx 1 root root 7 Jan  9 04:03 /dev/mapper/mpatha3 -> ../dm-3

  == Comment: #2 - Chanh H. Nguyen <chnguyen at us.ibm.com> - 2018-01-09 11:35:04 ==
  I just modify the partitions and it is still showing the conflicting name on partitions.

  :~# ls -l /dev/mapper/mpatha*
  lrwxrwxrwx 1 root root 7 Jan  9 04:33 /dev/mapper/mpatha -> ../dm-0
  lrwxrwxrwx 1 root root 7 Jan  9 04:33 /dev/mapper/mpatha1 -> ../dm-1
  lrwxrwxrwx 1 root root 7 Jan  9 04:33 /dev/mapper/mpatha2 -> ../dm-2
  lrwxrwxrwx 1 root root 7 Jan  9 04:33 /dev/mapper/mpatha3 -> ../dm-3
  lrwxrwxrwx 1 root root 7 Jan  9 04:33 /dev/mapper/mpatha4 -> ../dm-4
  lrwxrwxrwx 1 root root 7 Jan  9 04:33 /dev/mapper/mpatha5 -> ../dm-5
  lrwxrwxrwx 1 root root 7 Jan  9 04:33 /dev/mapper/mpatha6 -> ../dm-6
  lrwxrwxrwx 1 root root 7 Jan  9 04:33 /dev/mapper/mpatha7 -> ../dm-7
  lrwxrwxrwx 1 root root 7 Jan  9 04:33 /dev/mapper/mpatha8 -> ../dm-8

  :~# fdisk -l /dev/mapper/mpatha
  Disk /dev/mapper/mpatha: 600 GiB, 644245094400 bytes, 1258291200 sectors
  Units: sectors of 1 * 512 = 512 bytes
  Sector size (logical/physical): 512 bytes / 512 bytes
  I/O size (minimum/optimal): 32768 bytes / 32768 bytes
  Disklabel type: dos
  Disk identifier: 0xa5be904b

  Device                   Boot      Start        End   Sectors  Size Id Type
  /dev/mapper/mpatha-part1            2048  419432447 419430400  200G 83 Linux
  /dev/mapper/mpatha-part2       419432448  838862847 419430400  200G 83 Linux
  /dev/mapper/mpatha-part3       838862848  964691967 125829120   60G 83 Linux
  /dev/mapper/mpatha-part4       964691968 1258291199 293599232  140G  5 Extended
  /dev/mapper/mpatha-part5       964694016 1006637055  41943040   20G 83 Linux
  /dev/mapper/mpatha-part6      1006639104 1048582143  41943040   20G 83 Linux
  /dev/mapper/mpatha-part7      1048584192 1090527231  41943040   20G 83 Linux
  /dev/mapper/mpatha-part8      1090529280 1132472319  41943040   20G 83 Linux

  == Comment: #5 - Kyle Mahlkuch <Kyle.Mahlkuch at ibm.com> - 2018-06-26 13:50:12 ==
  I have created and submitted a patch that should help with this bug. I will update when/if the patch is accepted.

  == Comment: #9 - Kyle Mahlkuch <Kyle.Mahlkuch at ibm.com> - 2018-07-27 09:10:44 ==
  Here is the patch:
  https://github.com/karelzak/util-linux/commit/73775189767195f1d9f5b6b6f6a54e51f61c4356

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu-power-systems/+bug/1784347/+subscriptions