Re: [Qemu-devel] [PATCH v7 16/24] vhost user: add rarp sending after live migration for legacy guest

[Thibaut Collet <thibaut.collet@6wind.com>]

On Fri, Oct 2, 2015 at 4:02 PM, Michael S. Tsirkin <mst@redhat.com> wrote:
> On Fri, Oct 02, 2015 at 09:55:01AM -0400, Marc-André Lureau wrote:
>>
>>
>> ----- Original Message -----
>> > On Thu, Oct 01, 2015 at 07:24:00PM +0200, marcandre.lureau@redhat.com wrote:
>> > > diff --git a/hw/net/vhost_net.c b/hw/net/vhost_net.c
>> > > index 840f443..da66b64 100644
>> > > --- a/hw/net/vhost_net.c
>> > > +++ b/hw/net/vhost_net.c
>> > > @@ -388,6 +388,18 @@ void vhost_net_cleanup(struct vhost_net *net)
>> > >      g_free(net);
>> > >  }
>> > >
>> > > +int vhost_net_notify_migration_done(struct vhost_net *net, char* mac_addr)
>> > > +{
>> > > +    const VhostOps *vhost_ops = net->dev.vhost_ops;
>> > > +    int r = -1;
>> > > +
>> > > +    if (vhost_ops->vhost_migration_done) {
>> > > +        r = vhost_ops->vhost_migration_done(&net->dev, mac_addr);
>> > > +    }
>> > > +
>> > > +    return r;
>> > > +}
>> > > +
>> > >  bool vhost_net_virtqueue_pending(VHostNetState *net, int idx)
>> > >  {
>> > >      return vhost_virtqueue_pending(&net->dev, idx);
>> > > @@ -479,6 +491,11 @@ void vhost_net_virtqueue_mask(VHostNetState *net,
>> > > VirtIODevice *dev,
>> > >  {
>> > >  }
>> > >
>> > > +int vhost_net_notify_migration_done(struct vhost_net *net)
>> > > +{
>> > > +    return -1;
>> > > +}
>> > > +
>> > >  VHostNetState *get_vhost_net(NetClientState *nc)
>> > >  {
>> > >      return 0;
>> >
>> > This signature does not fit the one above.
>> > How was this tested?
>> >
>>
>> Good question, I totally missed that. It has been there since Thibaut v6 series.
>>
>> I guess we all compile with CONFIG_VHOST_NET, and adding the missing char* mac_addr is enough to fix this.
>
> You will catch this if you build and test all targets.
>
> --
> MST

Sorry for the omission.
I have tested some QEMU configuration but all of them to test my feature.
The add of the missing char* mac_addr is sufficient : in this case the
function will be compliant with its definition set in the
include/net/vhost_net.h file.

Next time I will build all targets to avoid this kind of errors.

Thibaut.