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Bug
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Resolution: Unresolved
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Undefined
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None
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rhel-9.5
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None
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None
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rhel-sst-virtualization
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ssg_virtualization
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5
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False
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-
None
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None
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None
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None
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None
What were you trying to do that didn't work?
The capability of updating a mdev node device can be done on the persisted state, on the active state or on both(got this information from its patch series). But now it updates failed in active state.
Please provide the package NVR for which bug is seen:
libvirt-10.4.0-1.el9.x86_64
qemu-kvm-9.0.0-3.el9.x86_64
mdevctl-1.3.0-4.el10.x86_64
How reproducible:
100%
Steps to reproduce
1. Prepare a mdev device in active state.
virsh nodedev-info mdev_1742c362_9874_4ce3_a38c_1fe992a7a635_0000_b1_02_0 Name: mdev_1742c362_9874_4ce3_a38c_1fe992a7a635_0000_b1_02_0 Parent: pci_0000_b1_02_0 Active: yes Persistent: yes Autostart: no # virsh nodedev-dumpxml mdev_1742c362_9874_4ce3_a38c_1fe992a7a635_0000_b1_02_0 <device> <name>mdev_1742c362_9874_4ce3_a38c_1fe992a7a635_0000_b1_02_0</name> <path>/sys/devices/pci0000:b0/0000:b0:02.0/0000:b1:02.0/1742c362-9874-4ce3-a38c-1fe992a7a635</path> <parent>pci_0000_b1_02_0</parent> <driver> <name>nvidia-vgpu-vfio</name> </driver> <capability type='mdev'> <type id='nvidia-747'/> <uuid>1742c362-9874-4ce3-a38c-1fe992a7a635</uuid> <parent_addr>0000:b1:02.0</parent_addr> <iommuGroup number='259'/> </capability> </device>
2. Prepare a updated mdev device xml with new added attrs.
# virsh nodedev-dumpxml mdev_1742c362_9874_4ce3_a38c_1fe992a7a635_0000_b1_02_0 >update.xml # cat update.xml <device> <name>mdev_1742c362_9874_4ce3_a38c_1fe992a7a635_0000_b1_02_0</name> <path>/sys/devices/pci0000:b0/0000:b0:02.0/0000:b1:02.0/1742c362-9874-4ce3-a38c-1fe992a7a635</path> <parent>pci_0000_b1_02_0</parent> <driver> <name>nvidia-vgpu-vfio</name> </driver> <capability type='mdev'> <type id='nvidia-747'/> <uuid>1742c362-9874-4ce3-a38c-1fe992a7a635</uuid> <parent_addr>0000:b1:02.0</parent_addr> <iommuGroup number='259'/> <attr name='assign_adapter' value='0x01'/> <attr name='assign_domain' value='0x002c'/> </capability> </device>
3. Update the mdev node device.
# virsh nodedev-update mdev_1742c362_9874_4ce3_a38c_1fe992a7a635_0000_b1_02_0 update.xml
error: Failed to update node device mdev_1742c362_9874_4ce3_a38c_1fe992a7a635_0000_b1_02_0 from 'update.xml'
error: internal error: Unable to modify mediated device: Error: No callout script with version support found that supports live modify
4. Destroy the node device to change it to only persistent and then update.
# virsh nodedev-update mdev_1742c362_9874_4ce3_a38c_1fe992a7a635_0000_b1_02_0 update.xml Updated node device mdev_1742c362_9874_4ce3_a38c_1fe992a7a635_0000_b1_02_0 persistent config
Expected results:
Can update node device successfully in step 3.
Actual results
Filed update node device in active state.
