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[Qemu-devel] [Bug 1817268] [NEW] Input/output error during migration

From: Mathieu Corbin
Subject: [Qemu-devel] [Bug 1817268] [NEW] Input/output error during migration
Date: Fri, 22 Feb 2019 08:21:09 -0000 
Public bug reported:

Operating system: Ubuntu 18.04.2 LTS
qemu version: 2.11.1, but also reproduced with 3.1.0 (compiled manually).
virsh --version: 4.0.0

Hello,

I am having an issue with migration of UEFI virtual machines. If the
--copy-storage-inc and the --tunnelled libvirt flags are used together,
the migration fails. The same command for non-uefi virtual machines (e.g
the same libvirt xml without the <nvram> and <loader> tags) works.

The command/output error is:

virsh migrate --verbose --live --p2p --tunnelled --copy-storage-inc 
--change-protection --abort-on-error testuefi qemu+tcp://<ip>/system
error: internal error: qemu unexpectedly closed the monitor: Receiving block 
device images
2019-02-21T16:20:15.263261Z qemu-system-x86_64: error while loading state 
section id 2(block)
2019-02-21T16:20:15.263996Z qemu-system-x86_64: load of migration failed: 
Input/output error

If I remove one of the --tunnelled or the --copy-storage-inc flag, it
works, for example:

virsh migrate --verbose --live --p2p --copy-storage-inc --change-protection 
--abort-on-error testuefi qemu+tcp://<ip>/system
Migration: [100 %]

virsh migrate --verbose --live --p2p --tunnelled --change-protection 
--abort-on-error testuefi qemu+tcp://<ip>/system
Migration: [100 %]

I have no idea why those two flags combined together produce an error,
and only for UEFI virtual machines.

here is the libvirt xml definition:

<domain type='kvm' id='4'>
  <name>testuefi</name>
  <uuid>ce12de05-ec09-4b4b-a27a-47003a511bda</uuid>
  <description>CentOS 4.5 (32-bit)</description>
  <memory unit='KiB'>2097152</memory>
  <currentMemory unit='KiB'>1048576</currentMemory>
  <vcpu placement='static'>2</vcpu>
  <cputune>
    <shares>878</shares>
  </cputune>
  <resource>
    <partition>/machine</partition>
  </resource>
  <sysinfo type='smbios'>
    <system>
      <entry name='manufacturer'>Apache Software Foundation</entry>
      <entry name='product'>CloudStack KVM Hypervisor</entry>
      <entry name='uuid'>ce12de05-ec09-4b4b-a27a-47003a511bda</entry>
    </system>
  </sysinfo>
  <os>
    <type arch='x86_64' machine='pc-i440fx-2.11'>hvm</type>
    <loader readonly='yes' type='pflash'>/usr/share/OVMF/OVMF_CODE.fd</loader>
    <nvram>/var/lib/libvirt/qemu/nvram/testuefi_VARS.fd</nvram>
    <boot dev='cdrom'/>
    <boot dev='hd'/>
    <smbios mode='sysinfo'/>
  </os>
  <features>
    <acpi/>
    <apic/>
    <pae/>
  </features>
  <cpu mode='custom' match='exact' check='full'>
    <model fallback='forbid'>Westmere</model>
    <feature policy='require' name='vmx'/>
    <feature policy='require' name='vme'/>
    <feature policy='require' name='pclmuldq'/>
    <feature policy='require' name='x2apic'/>
    <feature policy='require' name='hypervisor'/>
    <feature policy='require' name='arat'/>
  </cpu>
  <clock offset='utc'/>
  <on_poweroff>destroy</on_poweroff>
  <on_reboot>restart</on_reboot>
  <on_crash>destroy</on_crash>
  <devices>
    <emulator>/usr/bin/kvm-spice</emulator>
    <disk type='file' device='disk'>
      <driver name='qemu' type='qcow2' cache='none'/>
      <source file='/var/lib/libvirt/images/testmigration.qcow2'/>
      <backingStore type='file' index='1'>
        <format type='raw'/>
        <source 
file='/var/lib/libvirt/images/b3e4b880-0611-43bc-9d71-9cdac138f6e2'/>
        <backingStore/>
      </backingStore>
      <target dev='vda' bus='virtio'/>
      <alias name='virtio-disk0'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x04' 
function='0x0'/>
    </disk>
    <disk type='file' device='cdrom'>
      <driver cache='none'/>
      <target dev='hdc' bus='ide'/>
      <readonly/>
      <alias name='ide0-1-0'/>
      <address type='drive' controller='0' bus='1' target='0' unit='0'/>
    </disk>
    <controller type='usb' index='0' model='piix3-uhci'>
      <alias name='usb'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x01' 
function='0x2'/>
    </controller>
    <controller type='pci' index='0' model='pci-root'>
            <alias name='pci.0'/>
    </controller>
    <controller type='ide' index='0'>
      <alias name='ide'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x01' 
function='0x1'/>
    </controller>
    <interface type='bridge'>
      <mac address='06:6a:20:00:00:55'/>
      <source bridge='public'/>
      <target dev='vnet4'/>
      <model type='virtio'/>
      <driver queues='2'/>
      <alias name='net0'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x03' 
function='0x0'/>
    </interface>
    <serial type='pty'>
      <source path='/dev/pts/2'/>
      <target type='isa-serial' port='0'>
        <model name='isa-serial'/>
      </target>
      <alias name='serial0'/>
    </serial>
    <console type='pty' tty='/dev/pts/2'>
      <source path='/dev/pts/2'/>
      <target type='serial' port='0'/>
      <alias name='serial0'/>
    </console>
    <input type='tablet' bus='usb'>
      <alias name='input0'/>
      <address type='usb' bus='0' port='1'/>
    </input>
    <input type='mouse' bus='ps2'>
      <alias name='input1'/>
    </input>
    <input type='keyboard' bus='ps2'>
      <alias name='input2'/>
    </input>
    <video>
      <model type='cirrus' vram='16384' heads='1' primary='yes'/>
      <alias name='video0'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x02' 
function='0x0'/>
    </video>
    <memballoon model='virtio'>
      <alias name='balloon0'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x05' 
function='0x0'/>
    </memballoon>
  </devices>
</domain>

Here is the qemu command on the destination host:

LC_ALL=C
PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin
QEMU_AUDIO_DRV=none /usr/bin/kvm-spice -name guest=testuefi-VM,debug-
threads=on -S -object
secret,id=masterKey0,format=raw,file=/var/lib/libvirt/qemu/domain-14
-testuefi-VM/master-key.aes -machine pc-i440fx-2.11,accel=kvm,usb=off
,dump-guest-core=off -cpu Skylake-
Server,vmx=on,pcid=on,ssbd=on,hypervisor=on -drive
file=/usr/share/OVMF/OVMF_CODE.fd,if=pflash,format=raw,unit=0,readonly=on
-drive file=/var/lib/libvirt/qemu/nvram/testuefi-
VM_VARS.fd,if=pflash,format=raw,unit=1 -m 1024 -realtime mlock=off -smp
1,sockets=1,cores=1,threads=1 -uuid b340b117-1704-4ccf-93a7-21303b12dd7f
-smbios 'type=1,manufacturer=Apache Software
Foundation,product=CloudStack KVM Hypervisor,uuid=b340b117-1704-4ccf-
93a7-21303b12dd7f' -no-user-config -nodefaults -chardev
socket,id=charmonitor,path=/var/lib/libvirt/qemu/domain-14-testuefi-
VM/monitor.sock,server,nowait -mon
chardev=charmonitor,id=monitor,mode=control -rtc base=utc -no-shutdown
-boot strict=on -device piix3-usb-uhci,id=usb,bus=pci.0,addr=0x1.0x2
-drive
file=/var/lib/libvirt/images/testmigration.qcow2,format=qcow2,if=none,id
=drive-virtio-disk0,cache=none -device virtio-blk-
pci,scsi=off,bus=pci.0,addr=0x5,drive=drive-virtio-disk0,id=virtio-
disk0,bootindex=2 -drive if=none,id=drive-
ide0-1-0,readonly=on,cache=none -device ide-cd,bus=ide.1,unit=0,drive
=drive-ide0-1-0,id=ide0-1-0,bootindex=1 -netdev
tap,fd=35,id=hostnet0,vhost=on,vhostfd=37 -device virtio-net-
pci,netdev=hostnet0,id=net0,mac=06:a0:66:00:00:0c,bus=pci.0,addr=0x3
-chardev pty,id=charserial0 -device isa-
serial,chardev=charserial0,id=serial0 -device usb-
tablet,id=input0,bus=usb.0,port=1 -vnc
vnc=unix:/var/run/qemu/b340b117-1704-4ccf-93a7-21303b12dd7f.sock -device
cirrus-vga,id=video0,bus=pci.0,addr=0x2 -incoming defer -msg
timestamp=on

Thanks,

** Affects: qemu
     Importance: Undecided
         Status: New

-- 
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https://bugs.launchpad.net/bugs/1817268

Title:
  Input/output error during migration

Status in QEMU:
  New

Bug description:
  Operating system: Ubuntu 18.04.2 LTS
  qemu version: 2.11.1, but also reproduced with 3.1.0 (compiled manually).
  virsh --version: 4.0.0

  Hello,

  I am having an issue with migration of UEFI virtual machines. If the
  --copy-storage-inc and the --tunnelled libvirt flags are used
  together, the migration fails. The same command for non-uefi virtual
  machines (e.g the same libvirt xml without the <nvram> and <loader>
  tags) works.

  The command/output error is:

  virsh migrate --verbose --live --p2p --tunnelled --copy-storage-inc 
--change-protection --abort-on-error testuefi qemu+tcp://<ip>/system
  error: internal error: qemu unexpectedly closed the monitor: Receiving block 
device images
  2019-02-21T16:20:15.263261Z qemu-system-x86_64: error while loading state 
section id 2(block)
  2019-02-21T16:20:15.263996Z qemu-system-x86_64: load of migration failed: 
Input/output error

  If I remove one of the --tunnelled or the --copy-storage-inc flag, it
  works, for example:

  virsh migrate --verbose --live --p2p --copy-storage-inc --change-protection 
--abort-on-error testuefi qemu+tcp://<ip>/system
  Migration: [100 %]

  virsh migrate --verbose --live --p2p --tunnelled --change-protection 
--abort-on-error testuefi qemu+tcp://<ip>/system
  Migration: [100 %]

  I have no idea why those two flags combined together produce an error,
  and only for UEFI virtual machines.

  here is the libvirt xml definition:

  <domain type='kvm' id='4'>
    <name>testuefi</name>
    <uuid>ce12de05-ec09-4b4b-a27a-47003a511bda</uuid>
    <description>CentOS 4.5 (32-bit)</description>
    <memory unit='KiB'>2097152</memory>
    <currentMemory unit='KiB'>1048576</currentMemory>
    <vcpu placement='static'>2</vcpu>
    <cputune>
      <shares>878</shares>
    </cputune>
    <resource>
      <partition>/machine</partition>
    </resource>
    <sysinfo type='smbios'>
      <system>
        <entry name='manufacturer'>Apache Software Foundation</entry>
        <entry name='product'>CloudStack KVM Hypervisor</entry>
        <entry name='uuid'>ce12de05-ec09-4b4b-a27a-47003a511bda</entry>
      </system>
    </sysinfo>
    <os>
      <type arch='x86_64' machine='pc-i440fx-2.11'>hvm</type>
      <loader readonly='yes' type='pflash'>/usr/share/OVMF/OVMF_CODE.fd</loader>
      <nvram>/var/lib/libvirt/qemu/nvram/testuefi_VARS.fd</nvram>
      <boot dev='cdrom'/>
      <boot dev='hd'/>
      <smbios mode='sysinfo'/>
    </os>
    <features>
      <acpi/>
      <apic/>
      <pae/>
    </features>
    <cpu mode='custom' match='exact' check='full'>
      <model fallback='forbid'>Westmere</model>
      <feature policy='require' name='vmx'/>
      <feature policy='require' name='vme'/>
      <feature policy='require' name='pclmuldq'/>
      <feature policy='require' name='x2apic'/>
      <feature policy='require' name='hypervisor'/>
      <feature policy='require' name='arat'/>
    </cpu>
    <clock offset='utc'/>
    <on_poweroff>destroy</on_poweroff>
    <on_reboot>restart</on_reboot>
    <on_crash>destroy</on_crash>
    <devices>
      <emulator>/usr/bin/kvm-spice</emulator>
      <disk type='file' device='disk'>
        <driver name='qemu' type='qcow2' cache='none'/>
        <source file='/var/lib/libvirt/images/testmigration.qcow2'/>
        <backingStore type='file' index='1'>
          <format type='raw'/>
          <source 
file='/var/lib/libvirt/images/b3e4b880-0611-43bc-9d71-9cdac138f6e2'/>
          <backingStore/>
        </backingStore>
        <target dev='vda' bus='virtio'/>
        <alias name='virtio-disk0'/>
        <address type='pci' domain='0x0000' bus='0x00' slot='0x04' 
function='0x0'/>
      </disk>
      <disk type='file' device='cdrom'>
        <driver cache='none'/>
        <target dev='hdc' bus='ide'/>
        <readonly/>
        <alias name='ide0-1-0'/>
        <address type='drive' controller='0' bus='1' target='0' unit='0'/>
      </disk>
      <controller type='usb' index='0' model='piix3-uhci'>
        <alias name='usb'/>
        <address type='pci' domain='0x0000' bus='0x00' slot='0x01' 
function='0x2'/>
      </controller>
      <controller type='pci' index='0' model='pci-root'>
            <alias name='pci.0'/>
      </controller>
      <controller type='ide' index='0'>
        <alias name='ide'/>
        <address type='pci' domain='0x0000' bus='0x00' slot='0x01' 
function='0x1'/>
      </controller>
      <interface type='bridge'>
        <mac address='06:6a:20:00:00:55'/>
        <source bridge='public'/>
        <target dev='vnet4'/>
        <model type='virtio'/>
        <driver queues='2'/>
        <alias name='net0'/>
        <address type='pci' domain='0x0000' bus='0x00' slot='0x03' 
function='0x0'/>
      </interface>
      <serial type='pty'>
        <source path='/dev/pts/2'/>
        <target type='isa-serial' port='0'>
          <model name='isa-serial'/>
        </target>
        <alias name='serial0'/>
      </serial>
      <console type='pty' tty='/dev/pts/2'>
        <source path='/dev/pts/2'/>
        <target type='serial' port='0'/>
        <alias name='serial0'/>
      </console>
      <input type='tablet' bus='usb'>
        <alias name='input0'/>
        <address type='usb' bus='0' port='1'/>
      </input>
      <input type='mouse' bus='ps2'>
        <alias name='input1'/>
      </input>
      <input type='keyboard' bus='ps2'>
        <alias name='input2'/>
      </input>
      <video>
        <model type='cirrus' vram='16384' heads='1' primary='yes'/>
        <alias name='video0'/>
        <address type='pci' domain='0x0000' bus='0x00' slot='0x02' 
function='0x0'/>
      </video>
      <memballoon model='virtio'>
        <alias name='balloon0'/>
        <address type='pci' domain='0x0000' bus='0x00' slot='0x05' 
function='0x0'/>
      </memballoon>
    </devices>
  </domain>

  Here is the qemu command on the destination host:

  LC_ALL=C
  PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin
  QEMU_AUDIO_DRV=none /usr/bin/kvm-spice -name guest=testuefi-VM,debug-
  threads=on -S -object
  secret,id=masterKey0,format=raw,file=/var/lib/libvirt/qemu/domain-14
  -testuefi-VM/master-key.aes -machine pc-i440fx-2.11,accel=kvm,usb=off
  ,dump-guest-core=off -cpu Skylake-
  Server,vmx=on,pcid=on,ssbd=on,hypervisor=on -drive
  file=/usr/share/OVMF/OVMF_CODE.fd,if=pflash,format=raw,unit=0,readonly=on
  -drive file=/var/lib/libvirt/qemu/nvram/testuefi-
  VM_VARS.fd,if=pflash,format=raw,unit=1 -m 1024 -realtime mlock=off
  -smp 1,sockets=1,cores=1,threads=1 -uuid b340b117-1704-4ccf-
  93a7-21303b12dd7f -smbios 'type=1,manufacturer=Apache Software
  Foundation,product=CloudStack KVM Hypervisor,uuid=b340b117-1704-4ccf-
  93a7-21303b12dd7f' -no-user-config -nodefaults -chardev
  socket,id=charmonitor,path=/var/lib/libvirt/qemu/domain-14-testuefi-
  VM/monitor.sock,server,nowait -mon
  chardev=charmonitor,id=monitor,mode=control -rtc base=utc -no-shutdown
  -boot strict=on -device piix3-usb-uhci,id=usb,bus=pci.0,addr=0x1.0x2
  -drive
  file=/var/lib/libvirt/images/testmigration.qcow2,format=qcow2,if=none,id
  =drive-virtio-disk0,cache=none -device virtio-blk-
  pci,scsi=off,bus=pci.0,addr=0x5,drive=drive-virtio-disk0,id=virtio-
  disk0,bootindex=2 -drive if=none,id=drive-
  ide0-1-0,readonly=on,cache=none -device ide-cd,bus=ide.1,unit=0,drive
  =drive-ide0-1-0,id=ide0-1-0,bootindex=1 -netdev
  tap,fd=35,id=hostnet0,vhost=on,vhostfd=37 -device virtio-net-
  pci,netdev=hostnet0,id=net0,mac=06:a0:66:00:00:0c,bus=pci.0,addr=0x3
  -chardev pty,id=charserial0 -device isa-
  serial,chardev=charserial0,id=serial0 -device usb-
  tablet,id=input0,bus=usb.0,port=1 -vnc
  vnc=unix:/var/run/qemu/b340b117-1704-4ccf-93a7-21303b12dd7f.sock
  -device cirrus-vga,id=video0,bus=pci.0,addr=0x2 -incoming defer -msg
  timestamp=on

  Thanks,

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