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virtio_rng: replace custom backend API with UserCreatable.complete() callback 

in addition fix default backend leak by releasing it if its
initialization failed.

Signed-off-by: Igor Mammedov <imammedo@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
This commit is contained in:
Igor Mammedov 2014-01-16 17:34:39 +01:00 committed by Luiz Capitulino
parent 269e09f3fc
commit 57d3e1b3f5
3 changed files with 19 additions and 19 deletions
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12
backends/rng.c
View File

@ -41,9 +41,9 @@ static bool rng_backend_prop_get_opened(Object *obj, Error **errp)
return s->opened;
}
void rng_backend_open(RngBackend *s, Error **errp)
static void rng_backend_complete(UserCreatable *uc, Error **errp)
{
object_property_set_bool(OBJECT(s), true, "opened", errp);
object_property_set_bool(OBJECT(uc), true, "opened", errp);
}
static void rng_backend_prop_set_opened(Object *obj, bool value, Error **errp)
@ -77,12 +77,20 @@ static void rng_backend_init(Object *obj)
NULL);
}
static void rng_backend_class_init(ObjectClass *oc, void *data)
{
UserCreatableClass *ucc = USER_CREATABLE_CLASS(oc);
ucc->complete = rng_backend_complete;
}
static const TypeInfo rng_backend_info = {
.name = TYPE_RNG_BACKEND,
.parent = TYPE_OBJECT,
.instance_size = sizeof(RngBackend),
.instance_init = rng_backend_init,
.class_size = sizeof(RngBackendClass),
.class_init = rng_backend_class_init,
.abstract = true,
.interfaces = (InterfaceInfo[]) {
{ TYPE_USER_CREATABLE },

15
hw/virtio/virtio-rng.c
View File

@ -15,6 +15,7 @@
#include "hw/virtio/virtio.h"
#include "hw/virtio/virtio-rng.h"
#include "sysemu/rng.h"
#include "qom/object_interfaces.h"
static bool is_guest_ready(VirtIORNG *vrng)
{
@ -148,6 +149,14 @@ static void virtio_rng_device_realize(DeviceState *dev, Error **errp)
if (vrng->conf.rng == NULL) {
vrng->conf.default_backend = RNG_RANDOM(object_new(TYPE_RNG_RANDOM));
user_creatable_complete(OBJECT(vrng->conf.default_backend),
&local_err);
if (local_err) {
error_propagate(errp, local_err);
object_unref(OBJECT(vrng->conf.default_backend));
return;
}
object_property_add_child(OBJECT(dev),
"default-backend",
OBJECT(vrng->conf.default_backend),
@ -166,12 +175,6 @@ static void virtio_rng_device_realize(DeviceState *dev, Error **errp)
return;
}
rng_backend_open(vrng->rng, &local_err);
if (local_err) {
error_propagate(errp, local_err);
return;
}
vrng->vq = virtio_add_queue(vdev, 8, handle_input);
assert(vrng->conf.max_bytes <= INT64_MAX);

11
include/sysemu/rng.h
View File

@ -79,15 +79,4 @@ void rng_backend_request_entropy(RngBackend *s, size_t size,
* to stop tracking any request.
*/
void rng_backend_cancel_requests(RngBackend *s);
/**
* rng_backend_open:
* @s: the backend to open
* @errp: a pointer to return the #Error object if an error occurs.
*
* This function will open the backend if it is not already open. Calling this
* function on an already opened backend will not result in an error.
*/
void rng_backend_open(RngBackend *s, Error **errp);
#endif