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

[Michal Prívozník]

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.


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

Michal