Re: [Qemu-devel] [PATCH] qdev-properties-system.c: Allow vlan or netdev for -device, not both

[Jason Wang <jasowang@redhat.com>]

On 11/08/2013 10:13 AM, Vlad Yasevich wrote:
> It is currently possible to specify things like:
> 	-device e1000,netdev=foo,vlan=1
> With this usage, whichever argument was specified last (vlan or netdev)
> overwrites what was previousely set and results in a non-working
> configuration.  Even worse, when used with multiqueue devices,
> it causes a segmentation fault on exit in qemu_free_net_client.
>
> That patch treates the above command line options as invalid and
> generates an error at start-up.
>
> Signed-off-by: Vlad Yasevich <vyasevic@redhat.com>
> ---
>  hw/core/qdev-properties-system.c | 9 +++++++++
>  1 file changed, 9 insertions(+)
>
> diff --git a/hw/core/qdev-properties-system.c b/hw/core/qdev-properties-system.c
> index 0eada32..729efa8 100644
> --- a/hw/core/qdev-properties-system.c
> +++ b/hw/core/qdev-properties-system.c
> @@ -205,6 +205,11 @@ static int parse_netdev(DeviceState *dev, const char *str, void **ptr)
>              goto err;
>          }
>  
> +        if (ncs[i]) {
> +            ret = -EINVAL;
> +            goto err;
> +        }
> +
>          ncs[i] = peers[i];
>          ncs[i]->queue_index = i;
>      }
> @@ -301,6 +306,10 @@ static void set_vlan(Object *obj, Visitor *v, void *opaque,
>          *ptr = NULL;
>          return;
>      }
> +    if (*ptr) {
> +        error_set_from_qdev_prop_error(errp, -EINVAL, dev, prop, name);
> +        return;
> +    }
>  
>      hubport = net_hub_port_find(id);
>      if (!hubport) {

Acked-by: Jason Wang <jasowang@redhat.com>