Comment 0 for bug 1473903

Problem Description
=============================
Two deivce created when creating 1 partition on a mpath device:

% sudo parted /dev/mapper/mpath2
GNU Parted 2.3
Using /dev/mapper/mpath2
Welcome to GNU Parted! Type 'help' to view a list of commands.
(parted) p
Model: Linux device-mapper (multipath) (dm)
Disk /dev/mapper/mpath2: 284GB
Sector size (logical/physical): 512B/4096B
Partition Table: msdos

Number Start End Size Type File system Flags

(parted) mkpart
mkpart mkpartfs
(parted) mkpart
Partition type? primary/extended? primary
File system type? [ext2]?
Start? 0%
End? 10%
Device /dev/mapper/mpath2p1 not found
device-mapper: table ioctl on failed: No such device or address
Device /dev/mapper/mpath2p1 not found
device-mapper: table ioctl on failed: No such device or address
(parted) p
Model: Linux device-mapper (multipath) (dm)
Disk /dev/mapper/mpath2: 284GB
Sector size (logical/physical): 512B/4096B
Partition Table: msdos

Number Start End Size Type File system Flags
 1 1049kB 28.4GB 28.4GB primary

(parted) q
Information: You may need to update /etc/fstab.

% ls /dev/mapper/mpath2*
/dev/mapper/mpath2 /dev/mapper/mpath2p1 /dev/mapper/mpath2-part1
%

Steps to Reproduce
===================================
1. install ubuntu 14.04.3 on a system which has mpath device
2. try to partition the mpath device, add one partition

---uname output---
Linux dilllp1 3.19.0-22-generic #22~14.04.1-Ubuntu SMP Wed Jun 17 10:03:39 UTC 2015 ppc64le ppc64le ppc64le GNU/Linux

Userspace tool common name: parted
Userspace rpm: parted, version: 2.3-19ubuntu1
The userspace tool has the following bit modes: 64-bit

== Comment: #2 - David Heller <email address hidden> - 2015-07-09 20:16:11 ==
Hi Ping,

Are you sure that /dev/mapper/mpath2p1 device was not left over from install, and perhaps existed before you did the parted? Remember there were some changes to multipath in the installer, and the installer now uses mpathXpX, and the running os uses mpathX-partX.. I think that is right?

If the two devices truly were created in the same parted operation, if you can reproduce it, can you run "udevadm monitor -p" during the operation, and provide the output? thx.

== Comment: #3 - Ping Tian Han <email address hidden> - 2015-07-09 22:03:53 ==
(In reply to comment #2)
> Hi Ping,
>
> Are you sure that /dev/mapper/mpath2p1 device was not left over from
> install, and perhaps existed before you did the parted? Remember there were
Yes, I'm pretty sure the device wasn't left over from install:

% ls /dev/mapper/mpath4*
/dev/mapper/mpath4
% sudo parted /dev/mapper/mpath4*
GNU Parted 2.3
Using /dev/mapper/mpath4
Welcome to GNU Parted! Type 'help' to view a list of commands.
(parted) p
Error: /dev/mapper/mpath4: unrecognised disk label
(parted) mklabel msdos
(parted) p
Model: Linux device-mapper (multipath) (dm)
Disk /dev/mapper/mpath4: 284GB
Sector size (logical/physical): 512B/4096B
Partition Table: msdos

Number Start End Size Type File system Flags

(parted) mkpart 1
parted: invalid token: 1
Partition type? primary/extended? primary
File system type? [ext2]?
Start? 0%
End? 10%
Device /dev/mapper/mpath4p1 not found
device-mapper: table ioctl on failed: No such device or address
Device /dev/mapper/mpath4p1 not found
device-mapper: table ioctl on failed: No such device or address
(parted) p
Model: Linux device-mapper (multipath) (dm)
Disk /dev/mapper/mpath4: 284GB
Sector size (logical/physical): 512B/4096B
Partition Table: msdos

Number Start End Size Type File system Flags
 1 1049kB 28.4GB 28.4GB primary

(parted) q
Information: You may need to update /etc/fstab.

% ls /dev/mapper/mpath4*
/dev/mapper/mpath4 /dev/mapper/mpath4p1 /dev/mapper/mpath4-part1
%
> some changes to multipath in the installer, and the installer now uses
> mpathXpX, and the running os uses mpathX-partX.. I think that is right?
>
> If the two devices truly were created in the same parted operation, if you
> can reproduce it, can you run "udevadm monitor -p" during the operation, and
> provide the output? thx.
No problem, I'll upload the result.

== Comment: #5 - Ping Tian Han <email address hidden> - 2015-07-09 22:09:59 ==
(In reply to comment #4)
> Created attachment 100079 [details]
> udevadm monitor -p outputs when bug reproduced

This is the outputs when creating mpath4-part2.

== Comment: #6 - Vaishnavi Bhat <email address hidden> - 2015-07-10 11:08:42 ==
Hi Ping Tian Han,

Can you please try to install the latest parted package from http://ftp.gnu.org/gnu/parted/ and check if the issue is reproduced ?

Thank you.

== Comment: #7 - Ping Tian Han <email address hidden> - 2015-07-12 22:05:17 ==
(In reply to comment #6)
> Hi Ping Tian Han,
>
> Can you please try to install the latest parted package from
> http://ftp.gnu.org/gnu/parted/ and check if the issue is reproduced ?
>
> Thank you.

The latest 3.2 version doesn't have this problem on dilllp1.