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Bug
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Resolution: Done-Errata
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Normal
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rhel-9.6
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qemu-kvm-9.1.0-15.el10_0.1
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No
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Moderate
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ZStream, 0day
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1
-
rhel-virt-networking-passt-pasta
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ssg_virtualization
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1
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False
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False
-
-
None
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Virtio-Net Sprint 11 - Mar
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Pass
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Automated
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Unspecified
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Unspecified
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Unspecified
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None
We need to add CONNECT and DISCONNECT events needed by libvirt to restart passt if it is killed
From RHEL-69455
One thing that doesn't currently work is restarting passt if its process somehow is killed - this was done with some stuff added automatically to the qemu commandline + watching for an event with normal passt, and vhost-user has a "reconnect" option, but I think that will only cause qemu to try to reconnect, I don't know if it will send the event that libvirt needs in order to start a new passt instance.
This is fixed by the following upstream commit:
commit 02fd9f8aeeb184276b283ae2f404bc3acf1e7b7a
Author: Laurent Vivier <lvivier@redhat.com>
Date: Mon Feb 17 10:25:50 2025 +0100
net: vhost-user: add QAPI events to report connection state
The netdev reports NETDEV_VHOST_USER_CONNECTED event when
the chardev is connected, and NETDEV_VHOST_USER_DISCONNECTED
when it is disconnected.
The NETDEV_VHOST_USER_CONNECTED event includes the chardev id.
This allows a system manager like libvirt to detect when the server
fails.
For instance with passt:
{ 'execute': 'qmp_capabilities' }
{ "return": { } }
[killing passt here]
{ "timestamp": { "seconds": 1739538634, "microseconds": 920450 },
"event": "NETDEV_VHOST_USER_DISCONNECTED",
"data": { "netdev-id": "netdev0" } }
[automatic reconnection with reconnect-ms]
{ "timestamp": { "seconds": 1739538638, "microseconds": 354181 },
"event": "NETDEV_VHOST_USER_CONNECTED",
"data": { "netdev-id": "netdev0", "chardev-id": "chr0" } }
Tested-by: Stefano Brivio <sbrivio@redhat.com>
Signed-off-by: Laurent Vivier <lvivier@redhat.com>
Message-Id: <20250217092550.1172055-1-lvivier@redhat.com>
Acked-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
- relates to
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RHEL-9945 vhost-user support for passt
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- Closed
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- links to
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RHBA-2025:147324
qemu-kvm update
