[libvirt] [PATCHv2] qemu: Redundant listen address entry in quest xml

[Wang Rui]

On 2014/8/14 20:44, Erik Skultety wrote:
> When editing guest's XML (on QEMU), it was possible to add multiple
> listen elements into graphics parent element. However QEMU does not
> support listening on multiple addresses. Configuration is tested for
> multiple 'listen address' and if positive, an error is raised.
> ---
>  src/qemu/qemu_process.c | 8 ++++++++
>  1 file changed, 8 insertions(+)
> 
> diff --git a/src/qemu/qemu_process.c b/src/qemu/qemu_process.c
> index 9e6a9ae..1810e6c 100644
> --- a/src/qemu/qemu_process.c
> +++ b/src/qemu/qemu_process.c
> @@ -3934,6 +3934,14 @@ int qemuProcessStart(virConnectPtr conn,
>                  }
>                  graphics->listens[0].fromConfig = true;
>              }
> +            /* multiple listen addresses are unsupported configuration in qemu
> +             */
> +            else if (graphics->nListens > 1) {
> +                virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
> +                               _("QEMU does not support multiple listen "
> +                                 "addresses for a domain."));
> +                goto cleanup;
> +            }
>          }
>      }
>  

Think about the libvirt updating scenario.

VMs with such XMLs are already defined and running.
After the libvirt updating to a new version which this
patch works, the VMs can't be started after shutdown.

I have a question to confirm. Is this a regression
or taken as an improvement ?
(I'm inclined to accept it.)