parted will generate two devices when adding one partition on mpath device
Affects | Status | Importance | Assigned to | Milestone | |
---|---|---|---|---|---|
multipath-tools (Ubuntu) |
Fix Released
|
High
|
Mathieu Trudel-Lapierre | ||
Trusty |
Won't Fix
|
High
|
Mathieu Trudel-Lapierre | ||
parted (Ubuntu) |
Invalid
|
High
|
Mathieu Trudel-Lapierre | ||
Trusty |
Invalid
|
High
|
Mathieu Trudel-Lapierre |
Bug Description
[Impact]
Admins who use parted to partition a multipath device after installation will find that more than one device may be generated for the same partition: one in the form XXXXpN, and one in the form XXXX-partN.
[Test case]
See below; use parted to partition a multipath device.
[Regression Potential]
Scripted tools which deal with the partitioning via parted and would depend on the devices from multipath being named "XXXXpN" will find that the device node is no longer available, since it was chosen to align with general udev rules for multipath coming from udev and multipath-tools, using the "XXXX-partN" form.
---
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/
device-mapper: table ioctl on failed: No such device or address
Device /dev/mapper/
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/
%
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/
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/
> 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/
device-mapper: table ioctl on failed: No such device or address
Device /dev/mapper/
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/
%
> 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://
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://
>
> Thank you.
The latest 3.2 version doesn't have this problem on dilllp1.
summary: |
- ISST-LTE: parted will generate two devices when adding one partition on - mpath device + parted will generate two devices when adding one partition on mpath + device |
affects: | ubuntu → parted (Ubuntu) |
Changed in multipath-tools (Ubuntu): | |
status: | New → Invalid |
assignee: | Mathieu Trudel-Lapierre (mathieu-tl) → nobody |
Changed in parted (Ubuntu): | |
status: | New → Triaged |
importance: | Undecided → High |
Changed in parted (Ubuntu): | |
status: | Triaged → Fix Released |
Changed in parted (Ubuntu Trusty): | |
status: | Triaged → In Progress |
Changed in multipath-tools (Ubuntu Trusty): | |
status: | Fix Released → Triaged |
Changed in parted (Ubuntu Trusty): | |
status: | Fix Committed → Invalid |
Changed in parted (Ubuntu): | |
status: | Triaged → Invalid |
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