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live update interface to delete the boot order setting succeed but no changes in xml

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    • rhel-9.5
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    • libvirt / General
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    • libvirt-10.3.0-1.el9
    • sst_virtualization
    • ssg_virtualization
    • 13
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    • 10.2.0

      Description of problem:
      live update interface to delete the boot order setting succeed but no changes in xml

      Version-Release number of selected component (if applicable):
      libvirt-10.0.0-2.el9.x86_64

      How reproducible:
      100%

      Steps to Reproduce:
      1. start a vm with interface as below with boot order setting:

      # virsh dumpxml test --xpath //interface
<interface type="network">
  <mac address="52:54:00:44:e1:cc"/>
  <source network="default"/>
  <model type="virtio"/>
<boot order="2"/>
  <address type="pci" domain="0x0000" bus="0x07" slot="0x00" function="0x0"/>
</interface>

# virsh start test
Domain 'test' started

      2. Try to live update the interface to delete the boot order setting:

      # virsh dumpxml test --xpath //interface | tee newinterface.xml
<interface type="network">
  <mac address="52:54:00:44:e1:cc"/>
  <source network="default" portid="f72867bf-9de0-4b21-b02a-900bcb7c8701" bridge="virbr0"/>
  <target dev="vnet17"/>
  <model type="virtio"/>
 <boot order="2"/>
  <alias name="net0"/>
  <address type="pci" domain="0x0000" bus="0x07" slot="0x00" function="0x0"/>
</interface>

      Edit the xml to delete the boot order setting:

      # # cat newinterface.xml
<interface type="network">
  <mac address="52:54:00:44:e1:cc"/>
  <source network="default" portid="f72867bf-9de0-4b21-b02a-900bcb7c8701" bridge="virbr0"/>
  <target dev="vnet17"/>
  <model type="virtio"/>
  <alias name="net0"/>
  <address type="pci" domain="0x0000" bus="0x07" slot="0x00" function="0x0"/>
</interface>

# virsh update-device test newinterface.xml
Device updated successfully

      3. The update succeed, but check the live xml, there is no changes, the boot order setting is still there:

      # # virsh dumpxml test --xpath //interface
<interface type="network">
  <mac address="52:54:00:44:e1:cc"/>
  <source network="default" portid="f72867bf-9de0-4b21-b02a-900bcb7c8701" bridge="virbr0"/>
  <target dev="vnet17"/>
  <model type="virtio"/>
*******<boot order="2"/> ********
  <alias name="net0"/>
  <address type="pci" domain="0x0000" bus="0x07" slot="0x00" function="0x0"/>
</interface>

      Actual results:
      Live update interface to delete the boot order setting succeed but no changes in the live xml

      Expected results:
      The update-device command should report error like:
      error: Failed to update device from newinterface.xml
      error: Operation not supported: cannot modify network device boot index setting

      Same issue when we use update-device to delete the boot order, mac, alias, rom, target dev, driver, it will always report succeed but no changes in the live xml.

            mprivozn@redhat.com Michal Privoznik
            yalzhang@redhat.com Yalan Zhang
            virt-maint virt-maint
            Yanqiu Zhang Yanqiu Zhang
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              Created:
              Updated: