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

On 08/14/2014 02:44 PM, 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.

We have a public bug open for this issue. It's nice to add those in the commit
message, if someone wants to know why the commit was added in the future.

> ---
>  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
> +             */

This comment is redundant - it basically repeats the error message.

> +            else if (graphics->nListens > 1) {

We prefer putting 'else' on the same line as the closing brace of the 'if' block:

> +                virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
> +                               _("QEMU does not support multiple listen "
> +                                 "addresses for a domain."));

This is not true. For example: you can use one VNC and one SPICE graphics,
both with different listen addresses. How about 'QEMU does not support
multiple listen addresses for one graphics device'?


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