kernel-packages team mailing list archive

[Chris Valean <cvalean@xxxxxxxxxxxxxxxxxxxxxx>]

Public bug reported:

Problem statement:
Wily (and probably other previous releases with the updated kernels) return a multipath error for vFC (virtual Fibre Channel).

Symptoms:
The following messages are in the dmesg log during booting:
    device-mapper: table: 252:4: multipath: error getting device
    device-mapper: IOCtl: error adding target to table

After logging in, run the command: multipath -ll

The multipath command does not return any errors, and no new messages
are added to the dmesg log or syslog after running the multipath
command.


Steps to repro
============
Tested with the released Wily (15.10), kernel 4.2.0-16-generic.

 1. Create a Wily VM.
 2. Boot and install the multipath-tools package.
 3. Shutdown and attach a Virtual Fiber Channel adapter and connect it to a virtual SAN.
    Note: The host must have a Fiber Channel adapter. Use Hyper-V managers Virtual SAN Manager to create a Virtual Fiber Channel Storage Area Network.
 4. Boot the VM.
 5. Issue the following command to see any errors were reported during the boot.
        dmesg | grep -i error
    You should see the following two error:
        device-mapper: table: 252:4: multipath: error getting device
        device-mapper: IOCtl: error adding target to table

Otherwise, the vFC disks are usable and show no issues at a use test
case.

** Affects: linux (Ubuntu)
     Importance: Undecided
         Status: Confirmed


** Tags: hyper-v

-- 
You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/1511534

Title:
  [Hyper-V] Fibre Channel multipath error message

Status in linux package in Ubuntu:
  Confirmed

Bug description:
  Problem statement:
  Wily (and probably other previous releases with the updated kernels) return a multipath error for vFC (virtual Fibre Channel).

  Symptoms:
  The following messages are in the dmesg log during booting:
      device-mapper: table: 252:4: multipath: error getting device
      device-mapper: IOCtl: error adding target to table

  After logging in, run the command: multipath -ll

  The multipath command does not return any errors, and no new messages
  are added to the dmesg log or syslog after running the multipath
  command.

  
  Steps to repro
  ============
  Tested with the released Wily (15.10), kernel 4.2.0-16-generic.

   1. Create a Wily VM.
   2. Boot and install the multipath-tools package.
   3. Shutdown and attach a Virtual Fiber Channel adapter and connect it to a virtual SAN.
      Note: The host must have a Fiber Channel adapter. Use Hyper-V managers Virtual SAN Manager to create a Virtual Fiber Channel Storage Area Network.
   4. Boot the VM.
   5. Issue the following command to see any errors were reported during the boot.
          dmesg | grep -i error
      You should see the following two error:
          device-mapper: table: 252:4: multipath: error getting device
          device-mapper: IOCtl: error adding target to table

  Otherwise, the vFC disks are usable and show no issues at a use test
  case.

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1511534/+subscriptions