Re: [PATCH v2] vfio-user: reject failover during init

On 13/08/2026 12:08, Hugo Komatsu wrote:

> Virtio-net failover is a networking feature that relies on a primary
> and standby device pair. This is not currently supported for vfio-user.
> Refuse initialization if this property is set.
> 
> Signed-off-by: Hugo Komatsu <[email protected]>
> Reviewed-by: John Levon <[email protected]>
> ---
>   hw/vfio-user/pci.c | 5 +++++
>   1 file changed, 5 insertions(+)
> 
> diff --git a/hw/vfio-user/pci.c b/hw/vfio-user/pci.c
> index 8e7ce5a92e..975d754597 100644
> --- a/hw/vfio-user/pci.c
> +++ b/hw/vfio-user/pci.c
> @@ -251,6 +251,11 @@ static void vfio_user_pci_realize(PCIDevice *pdev, Error **errp)
>           return;
>       }
>   
> +    if (pdev->failover_pair_id) {
> +        error_setg(errp, "vfio-user: failover is not supported");
> +        return;
> +    }
> +
>       sock_name = udev->socket->u.q_unix.path;
>   
>       vbasedev->name = g_strdup_printf("vfio-user:%s", sock_name);

Reviewed-by: Mark Cave-Ayland <[email protected]>


ATB,

Mark.