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[Bug 1761646] Re: Can't mount kvm image file on new kernel of 16.04(linux 4.4.0-119)

To: group.of.nepali.translators@xxxxxxxxxxxxxxxxxxx
From: Joseph Salisbury <joseph.salisbury@xxxxxxxxxxxxx>
Date: Fri, 06 Apr 2018 17:48:33 -0000
Reply-to: Bug 1761646 <1761646@xxxxxxxxxxxxxxxxxx>
Sender: bounces@xxxxxxxxxxxxx
Would it be possible for you to test the proposed kernel and post back if it resolves this bug?
See https://wiki.ubuntu.com/Testing/EnableProposed for documentation how to enable and use -proposed. 

Thank you in advance!

** Changed in: linux (Ubuntu)
   Importance: Undecided => Medium

** Also affects: linux (Ubuntu Xenial)
   Importance: Undecided
       Status: New

** Changed in: linux (Ubuntu Xenial)
   Importance: Undecided => Medium

** Changed in: linux (Ubuntu Xenial)
       Status: New => Incomplete

** Tags added: kernel-da-key

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https://bugs.launchpad.net/bugs/1761646

Title:
  Can't mount kvm image file on  new kernel of 16.04(linux 4.4.0-119)

Status in linux package in Ubuntu:
  Incomplete
Status in linux source package in Xenial:
  Incomplete

Bug description:
  When I use 4.4.0-62-generic　kernel, I can mount kvm image file.
  But when I use 4.4.0-116-generic or 119　kernel, I can't mount the kvm image file.
  Is there some way to mount the kvm image file on 4.4.0-116-generic later kernel?

  - release

  root@ofaci1:~# lsb_release -a
  No LSB modules are available.
  Distributor ID: Ubuntu
  Description:    Ubuntu 16.04.4 LTS
  Release:        16.04
  Codename:       xenial
  root@ofaci1:~#

  
  - packages

  root@ofaci1:~# dpkg -l | egrep "qemu|mount|linux-image-4.4.0-11"
  ii  cgroupfs-mount                      1.2                                        all          Light-weight package to set up cgroupfs mounts
  ii  ipxe-qemu                           1.0.0+git-20150424.a25a16d-1ubuntu1.2      all          PXE boot firmware - ROM images for qemu
  ii  libmount1:amd64                     2.27.1-6ubuntu3.4                          amd64        device mounting library
  ii  linux-image-4.4.0-116-generic       4.4.0-116.140                              amd64        Linux kernel image for version 4.4.0 on 64 bit x86 SMP
  ii  linux-image-4.4.0-119-generic       4.4.0-119.143                              amd64        Linux kernel image for version 4.4.0 on 64 bit x86 SMP
  ii  mount                               2.27.1-6ubuntu3.4                          amd64        tools for mounting and manipulating filesystems
  ii  qemu-block-extra:amd64              1:2.5+dfsg-5ubuntu10.24                    amd64        extra block backend modules for qemu-system and qemu-utils
  ii  qemu-kvm                            1:2.5+dfsg-5ubuntu10.24                    amd64        QEMU Full virtualization
  ii  qemu-system-common                  1:2.5+dfsg-5ubuntu10.24                    amd64        QEMU full system emulation binaries (common files)
  ii  qemu-system-x86                     1:2.5+dfsg-5ubuntu10.24                    amd64        QEMU full system emulation binaries (x86)
  ii  qemu-utils                          1:2.5+dfsg-5ubuntu10.24                    amd64        QEMU utilities
  root@ofaci1:~#

  
  - Use 4.4.0-62-generic

  root@ofaci1:~# uname -a
  Linux ofaci1 4.4.0-62-generic #83-Ubuntu SMP Wed Jan 18 14:10:15 UTC 2017 x86_64 x86_64 x86_64 GNU/Linux
  root@ofaci1:~# qemu-nbd --connect /dev/nbd1 /opt/ci-pool/slave1.qcow2
  root@ofaci1:~# fdisk /dev/nbd1

  Welcome to fdisk (util-linux 2.27.1).
  Changes will remain in memory only, until you decide to write them.
  Be careful before using the write command.

  
  Command (m for help): p
  Disk /dev/nbd1: 40 GiB, 42949672960 bytes, 83886080 sectors
  Units: sectors of 1 * 512 = 512 bytes
  Sector size (logical/physical): 512 bytes / 512 bytes
  I/O size (minimum/optimal): 512 bytes / 512 bytes
  Disklabel type: dos
  Disk identifier: 0x000dfd65

  Device      Boot   Start      End  Sectors  Size Id Type
  /dev/nbd1p1         2048  3905535  3903488  1.9G 82 Linux swap / Solaris
  /dev/nbd1p2 *    3905536 83884031 79978496 38.1G 83 Linux

  Command (m for help): q

  root@ofaci1:~# mount /dev/nbd1p2 /mnt/d1
  root@ofaci1:~# ls /mnt/d1
  bin   etc         initrd.img.old  lost+found  opt   run   sys  var
  boot  home        lib             media       proc  sbin  tmp  vmlinuz
  dev   initrd.img  lib64           mnt         root  srv   usr  vmlinuz.old
  root@ofaci1:~# umount /mnt/d1

  
  - Use 4.4.0-119-generic

  root@ofaci1:~# uname -a
  Linux ofaci1 4.4.0-119-generic #143-Ubuntu SMP Mon Apr 2 16:08:24 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux
  root@ofaci1:~# qemu-nbd --connect /dev/nbd1 /opt/ci-pool/slave1.qcow2
  root@ofaci1:~# echo $?
  0
  root@ofaci1:~# fdisk /dev/nbd1

  Welcome to fdisk (util-linux 2.27.1).
  Changes will remain in memory only, until you decide to write them.
  Be careful before using the write command.

  
  Command (m for help): p
  Disk /dev/nbd1: 40 GiB, 42949672960 bytes, 83886080 sectors
  Units: sectors of 1 * 512 = 512 bytes
  Sector size (logical/physical): 512 bytes / 512 bytes
  I/O size (minimum/optimal): 512 bytes / 512 bytes
  Disklabel type: dos
  Disk identifier: 0x000dfd65

  Device      Boot   Start      End  Sectors  Size Id Type
  /dev/nbd1p1         2048  3905535  3903488  1.9G 82 Linux swap / Solaris
  /dev/nbd1p2 *    3905536 83884031 79978496 38.1G 83 Linux

  Command (m for help): q

  root@ofaci1:~# mount /dev/nbd1p2 /mnt/d1
  mount: special device /dev/nbd1p2 does not exist
  root@ofaci1:~# ls /dev/nbd1*
  /dev/nbd1   /dev/nbd11  /dev/nbd13  /dev/nbd15
  /dev/nbd10  /dev/nbd12  /dev/nbd14
  root@ofaci1:~#

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