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Bug 2103526 - Update the interface trustGuestRxFilters and backend setting return succeed but no changes
Summary: Update the interface trustGuestRxFilters and backend setting return succeed b...
Keywords:
Status: CLOSED MIGRATED
Alias: None
Product: Red Hat Enterprise Linux 9
Classification: Red Hat
Component: libvirt
Version: 9.1
Hardware: Unspecified
OS: Unspecified
low
low
Target Milestone: rc
: ---
Assignee: Virtualization Maintenance
QA Contact: yalzhang@redhat.com
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2022-07-04 01:43 UTC by yalzhang@redhat.com
Modified: 2023-07-07 19:21 UTC (History)
2 users (show)

Fixed In Version:
Doc Type: If docs needed, set a value
Doc Text:
Clone Of:
Environment:
Last Closed: 2023-07-07 19:20:55 UTC
Type: Bug
Target Upstream Version:
Embargoed:
pm-rhel: mirror+

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Links
System ID Private Priority Status Summary Last Updated
Red Hat Issue Tracker   RHEL-735 0 None None None 2023-07-07 19:20:54 UTC
Red Hat Issue Tracker RHELPLAN-126901 0 None None None 2022-07-04 01:46:31 UTC

Description yalzhang@redhat.com 2022-07-04 01:43:23 UTC 
Description of problem:
Update the interface trustGuestRxFilters and backend setting return succeed but no changes

Version-Release number of selected component (if applicable):
libvirt-8.5.0-1.el9.x86_64

How reproducible:
100%

Steps to Reproduce:
1. Start a vm with direct type interface as below:
# virsh start vm2
Domain 'vm2' started
# virsh dumpxml vm2 | grep /interface -B7
    <interface type='direct' trustGuestRxFilters='yes'>
      <mac address='52:54:00:65:52:cb'/>
      <source dev='eno2' mode='bridge'/>
      <target dev='macvtap0'/>
      <model type='virtio'/>
      <alias name='net0'/>
      <address type='pci' domain='0x0000' bus='0x01' slot='0x00' function='0x0'/>
    </interface>
2. update the trustGuestRxFilters setting from "yes" to "no" by update-device:
# cat direct.xml
 <interface type='direct' trustGuestRxFilters='no'>
      <mac address='52:54:00:65:52:cb'/>
      <source dev='eno2' mode='bridge'/>
      <target dev='macvtap0'/>
      <model type='virtio'/>
      <alias name='net0'/>
      <address type='pci' domain='0x0000' bus='0x01' slot='0x00' function='0x0'/>
    </interface>
# virsh update-device vm2 direct.xml
Device updated successfully

3. the update-device command succeed, but the live xml do not changes:
# virsh dumpxml vm2 | grep /interface -B7
    <interface type='direct' trustGuestRxFilters='yes'>
      <mac address='52:54:00:65:52:cb'/>
      <source dev='eno2' mode='bridge'/>
      <target dev='macvtap0'/>
      <model type='virtio'/>
      <alias name='net0'/>
      <address type='pci' domain='0x0000' bus='0x01' slot='0x00' function='0x0'/>
    </interface>

Another scenario for backend:
# virsh dumpxml vm2 | grep /interface -B8
    <interface type='network'>
      <mac address='52:54:00:cf:af:c6'/>
      <source network='default' portid='1c06f82e-fa6c-4de9-9cac-8973b1db1eec' bridge='virbr0'/>
      <target dev='vnet1'/>
      <model type='virtio'/>
      <backend tap='/dev/net/tun' vhost='/dev/vhost-net'/>
      <alias name='net0'/>
      <address type='pci' domain='0x0000' bus='0x01' slot='0x00' function='0x0'/>
    </interface>
# cat backend.xml
 <interface type='network'>
      <mac address='52:54:00:cf:af:c6'/>
      <source network='default' portid='1c06f82e-fa6c-4de9-9cac-8973b1db1eec' bridge='virbr0'/>
      <target dev='vnet1'/>
      <model type='virtio'/>
      <backend tap='/dev/net/tun1' vhost='/dev/vhost-net2'/>
      <alias name='net0'/>
      <address type='pci' domain='0x0000' bus='0x01' slot='0x00' function='0x0'/>
    </interface>
# virsh update-device vm2 backend.xml
Device updated successfully
# virsh dumpxml vm2 | grep backend
      <backend tap='/dev/net/tun' vhost='/dev/vhost-net'/>

Actual results:
Use update-device to update trustGuestRxFilters attribute or backend elements, the command returns succeed, but the live xml does not update accordingly.

Expected results:
libvirt should return unsupported error if such elements can not be live updated

Additional info:
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