[Bug 1866792] [NEW] formating vdi-disk over nbd fails

From: Eilert <1866792@bugs.launchpad.net>
To: qemu-devel@nongnu.org
Subject: [Bug 1866792] [NEW] formating vdi-disk over nbd fails
Date: Tue, 10 Mar 2020 09:57:12 -0000	[thread overview]
Message-ID: <158383423277.12441.11625227963369015627.malonedeb@soybean.canonical.com> (raw)

Public bug reported:

Hi,
after creating a vdi-image with qemu-vdi and attaching it with qemu-nbd partitioning works fine, but the system hangs up during formating with mkfs.ext4.

Same procedure with qcow2-image works fine 
Tested on Fedora 31 kernel  5.5.7-200.fc31.x86_64

-----------------
#! /bin/sh

qemu-img create -f qcow2 ~/test.qcow2 32G
#qemu-img version 4.1.1 (qemu-4.1.1-1.fc31)

modprobe nbd max_part=8
qemu-nbd --connect=/dev/nbd2 ~/test.qcow2
#qemu-nbd 4.1.1 (qemu-4.1.1-1.fc31)

parted -s /dev/nbd2 "mklabel gpt"
parted -s -a optimal /dev/nbd2 "mkpart test ext4 2048 32G "
parted  -s -a optimal /dev/nbd2 "p"

mkfs.ext4 /dev/nbd2p1
#Format hangs up due to IO errors.
#Tested on Fedora 31, kernel 5.5.7-200.fc31.x86_64

mkdir /mnt/test_qcow2

mount /dev/nbd2p1 /mnt/test_qcow2
df -H

-------------------
#! /bin/sh

qemu-img create -f vdi ~/test.vdi 32G

modprobe nbd max_part=8
qemu-nbd --connect=/dev/nbd4 ~/test.vdi

parted -s /dev/nbd4 "mklabel gpt"
parted -s -a optimal /dev/nbd4 "mkpart test ext4 2048 32G "
parted  -s -a optimal /dev/nbd4 "p"

mkfs.ext4 /dev/nbd4p1
#Format hangs up due to IO errors 
#Tested on Fedora 31 kernel  5.5.7-200.fc31.x86_64

mkdir /mnt/test_vdi

mount /dev/nbd4p1 /mnt/test_vdi
df -H
----------------------

Kind regards
  Eilert

PS.: There may be a connection to this bug:

#1661758 qemu-nbd causes data corruption in VDI-format disk images

** Affects: qemu
     Importance: Undecided
         Status: New

** Attachment added: "virtual_disk_vdi.sh"
   https://bugs.launchpad.net/bugs/1866792/+attachment/5335236/+files/virtual_disk_vdi.sh

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https://bugs.launchpad.net/bugs/1866792

Title:
  formating vdi-disk over nbd fails

Status in QEMU:
  New

Bug description:
  Hi,
  after creating a vdi-image with qemu-vdi and attaching it with qemu-nbd partitioning works fine, but the system hangs up during formating with mkfs.ext4.

  Same procedure with qcow2-image works fine 
  Tested on Fedora 31 kernel  5.5.7-200.fc31.x86_64

  -----------------
  #! /bin/sh

  qemu-img create -f qcow2 ~/test.qcow2 32G
  #qemu-img version 4.1.1 (qemu-4.1.1-1.fc31)

  modprobe nbd max_part=8
  qemu-nbd --connect=/dev/nbd2 ~/test.qcow2
  #qemu-nbd 4.1.1 (qemu-4.1.1-1.fc31)

  parted -s /dev/nbd2 "mklabel gpt"
  parted -s -a optimal /dev/nbd2 "mkpart test ext4 2048 32G "
  parted  -s -a optimal /dev/nbd2 "p"

  mkfs.ext4 /dev/nbd2p1
  #Format hangs up due to IO errors.
  #Tested on Fedora 31, kernel 5.5.7-200.fc31.x86_64

  mkdir /mnt/test_qcow2

  mount /dev/nbd2p1 /mnt/test_qcow2
  df -H

  -------------------
  #! /bin/sh

  qemu-img create -f vdi ~/test.vdi 32G

  modprobe nbd max_part=8
  qemu-nbd --connect=/dev/nbd4 ~/test.vdi

  parted -s /dev/nbd4 "mklabel gpt"
  parted -s -a optimal /dev/nbd4 "mkpart test ext4 2048 32G "
  parted  -s -a optimal /dev/nbd4 "p"

  mkfs.ext4 /dev/nbd4p1
  #Format hangs up due to IO errors 
  #Tested on Fedora 31 kernel  5.5.7-200.fc31.x86_64

  mkdir /mnt/test_vdi

  mount /dev/nbd4p1 /mnt/test_vdi
  df -H
  ----------------------

  Kind regards
    Eilert

  PS.: There may be a connection to this bug:

  #1661758 qemu-nbd causes data corruption in VDI-format disk images

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