Re: [Qemu-devel] [PATCH v2 37/36] qdev: device_del: search for to be unplugged device in 'peripheral' container

[Igor Mammedov <imammedo@redhat.com>]

On Tue, 7 Oct 2014 19:59:51 +0800
Zhu Guihua <zhugh.fnst@cn.fujitsu.com> wrote:

> On Thu, 2014-10-02 at 10:08 +0000, Igor Mammedov wrote:
> > device_add puts every device with 'id' inside of 'peripheral'
> > container using id's value as the last component name.
> > Use it by replacing recursive search on sysbus with path
> > lookup in 'peripheral' container, which could handle both
> > BUS and BUS-less device cases.
> > 
> 
> If I want to delete device without id inside of 'peripheral-anon'
> container, the command 'device_del' does not work. 
> My suggestion is deleting device by the last component name, is this
> feasiable?
So far device_del was designed to work only with id-ed devices.

What's a use-case for unplugging unnamed device from peripheral-anon?

> Thanks.
> 
> Zhu
> 
> > Signed-off-by: Igor Mammedov <imammedo@redhat.com>
> > ---
> >  qdev-monitor.c | 13 +++++++++----
> >  1 file changed, 9 insertions(+), 4 deletions(-)
> > 
> > diff --git a/qdev-monitor.c b/qdev-monitor.c
> > index c721451..754437b 100644
> > --- a/qdev-monitor.c
> > +++ b/qdev-monitor.c
> > @@ -686,15 +686,20 @@ int do_device_add(Monitor *mon, const QDict *qdict, QObject **ret_data)
> >  
> >  void qmp_device_del(const char *id, Error **errp)
> >  {
> > -    DeviceState *dev;
> > +    Object *obj;
> > +    char *root_path = object_get_canonical_path(qdev_get_peripheral());
> > +    char *path = g_strdup_printf("%s/%s", root_path, id);
> >  
> > -    dev = qdev_find_recursive(sysbus_get_default(), id);
> > -    if (!dev) {
> > +    g_free(root_path);
> > +    obj = object_resolve_path_type(path, TYPE_DEVICE, NULL);
> > +    g_free(path);
> > +
> > +    if (!obj) {
> >          error_set(errp, QERR_DEVICE_NOT_FOUND, id);
> >          return;
> >      }
> >  
> > -    qdev_unplug(dev, errp);
> > +    qdev_unplug(DEVICE(obj), errp);
> >  }
> >  
> >  void qdev_machine_init(void)
> 
>