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usb: Add QOM property "attached". 

USB devices in attached state are visible to the guest.  This patch adds
a QOM property for this.  Write access is opt-in per device.  Some
devices manage attached state automatically (usb-host, usb-serial,
usb-redir), so we can't enable write access universally but have to do
it on a case by case base.  So far, no device opts in.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Reviewed-by: Markus Armbruster <armbru@redhat.com>
Message-id: 1465984019-28963-4-git-send-email-kraxel@redhat.com

[ minor codestyle fix ]

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
This commit is contained in:
Gerd Hoffmann 2016-06-15 11:46:57 +02:00
parent eb19d2b9d1
commit 1e351dc373
2 changed files with 44 additions and 0 deletions
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43
hw/usb/bus.c
View File

@ -736,6 +736,48 @@ USBDevice *usbdevice_create(const char *cmdline)
return dev;
}
static bool usb_get_attached(Object *obj, Error **errp)
{
USBDevice *dev = USB_DEVICE(obj);
return dev->attached;
}
static void usb_set_attached(Object *obj, bool value, Error **errp)
{
USBDevice *dev = USB_DEVICE(obj);
Error *err = NULL;
if (dev->attached == value) {
return;
}
if (value) {
usb_device_attach(dev, &err);
if (err) {
error_propagate(errp, err);
}
} else {
usb_device_detach(dev);
}
}
static void usb_device_instance_init(Object *obj)
{
USBDevice *dev = USB_DEVICE(obj);
USBDeviceClass *klass = USB_DEVICE_GET_CLASS(dev);
if (klass->attached_settable) {
object_property_add_bool(obj, "attached",
usb_get_attached, usb_set_attached,
NULL);
} else {
object_property_add_bool(obj, "attached",
usb_get_attached, NULL,
NULL);
}
}
static void usb_device_class_init(ObjectClass *klass, void *data)
{
DeviceClass *k = DEVICE_CLASS(klass);
@ -749,6 +791,7 @@ static const TypeInfo usb_device_type_info = {
.name = TYPE_USB_DEVICE,
.parent = TYPE_DEVICE,
.instance_size = sizeof(USBDevice),
.instance_init = usb_device_instance_init,
.abstract = true,
.class_size = sizeof(USBDeviceClass),
.class_init = usb_device_class_init,

1
include/hw/usb.h
View File

@ -347,6 +347,7 @@ typedef struct USBDeviceClass {
const char *product_desc;
const USBDesc *usb_desc;
bool attached_settable;
} USBDeviceClass;
typedef struct USBPortOps {