[libvirt PATCH 1/9] qemu: start the D-Bus daemon as needed

[Marc-André Lureau]

On Mon, Nov 29, 2021 at 9:20 PM Michal Prívozník <mprivozn at redhat.com> wrote:
>
> On 11/5/21 11:51, marcandre.lureau at redhat.com wrote:
> > From: Marc-André Lureau <marcandre.lureau at redhat.com>
> >
> > The daemon is started on daemon in external devices and hotplug code.
> > Add a mechanism to start it before qemu, if qemu itself needs it. (it is
> > already stopped in qemuProcessStop)
> >
> > Signed-off-by: Marc-André Lureau <marcandre.lureau at redhat.com>
> > ---
> >  src/qemu/qemu_domain.h  | 1 +
> >  src/qemu/qemu_process.c | 4 ++++
> >  2 files changed, 5 insertions(+)
> >
> > diff --git a/src/qemu/qemu_domain.h b/src/qemu/qemu_domain.h
> > index 6728ab047ed0..575fb8393b83 100644
> > --- a/src/qemu/qemu_domain.h
> > +++ b/src/qemu/qemu_domain.h
> > @@ -237,6 +237,7 @@ struct _qemuDomainObjPrivate {
> >      /* running backup job */
> >      virDomainBackupDef *backup;
> >
> > +    bool dbusDaemonWanted;
> >      bool dbusDaemonRunning;
> >
> >      /* list of Ids to migrate */
> > diff --git a/src/qemu/qemu_process.c b/src/qemu/qemu_process.c
> > index d5f8a47ac293..4ca9b100a802 100644
> > --- a/src/qemu/qemu_process.c
> > +++ b/src/qemu/qemu_process.c
> > @@ -7284,6 +7284,10 @@ qemuProcessLaunch(virConnectPtr conn,
> >                                       &nnicindexes, &nicindexes, 0)))
> >          goto cleanup;
> >
> > +    if (QEMU_DOMAIN_PRIVATE(vm)->dbusDaemonWanted &&
> > +        qemuDBusStart(driver, vm) < 0)
> > +        goto cleanup;
> > +
>
> We already have priv variable, so s/QEMU_DOMAIN_PRIVATE(vm)/priv/.
> However, we already have qemuExtDevicesStart() which I believe can be
> used to check whether dbus graphics was defined and thus whether dbus
> daemon needs to be started.

indeed, done.
thanks

>
>
> >      if (incoming && incoming->fd != -1)
> >          virCommandPassFD(cmd, incoming->fd, 0);
> >
> >
>
> Michal
>