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qdev: Prepare "realized" property

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Introduce the QOM realizefn suggested by Anthony.
Detailed documentation is supplied in the qdev header.

For now this implements a default DeviceClass::realize callback that
just wraps DeviceClass::init, which it deprecates.
Once all devices have been converted to DeviceClass::realize,
DeviceClass::init is to be removed.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Andreas Färber <afaerber@suse.de>
Cc: Anthony Liguori <anthony@codemonkey.ws>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
This commit is contained in:
Andreas Färber 2013-01-09 03:58:11 +01:00 • committed by Anthony Liguori
parent 7983c8a335
commit 249d41720b
2 changed files with 124 additions and 26 deletions
Download patch file Download diff file Expand all files Collapse all files

98
hw/qdev.c
View file

@ -148,39 +148,32 @@ DeviceState *qdev_try_create(BusState *bus, const char *type)
Return 0 on success. */
int qdev_init(DeviceState *dev)
{
DeviceClass *dc = DEVICE_GET_CLASS(dev);
int rc;
Error *local_err = NULL;
assert(!dev->realized);
rc = dc->init(dev);
if (rc < 0) {
object_property_set_bool(OBJECT(dev), true, "realized", &local_err);
if (local_err != NULL) {
error_free(local_err);
qdev_free(dev);
return rc;
}
if (!OBJECT(dev)->parent) {
static int unattached_count = 0;
gchar *name = g_strdup_printf("device[%d]", unattached_count++);
object_property_add_child(container_get(qdev_get_machine(),
"/unattached"),
name, OBJECT(dev), NULL);
g_free(name);
}
if (qdev_get_vmsd(dev)) {
vmstate_register_with_alias_id(dev, -1, qdev_get_vmsd(dev), dev,
dev->instance_id_alias,
dev->alias_required_for_version);
}
dev->realized = true;
if (dev->hotplugged) {
device_reset(dev);
return -1;
}
return 0;
}
static void device_realize(DeviceState *dev, Error **err)
{
DeviceClass *dc = DEVICE_GET_CLASS(dev);
if (dc->init) {
int rc = dc->init(dev);
if (rc < 0) {
error_setg(err, "Device initialization failed.");
return;
}
}
}
void qdev_set_legacy_instance_id(DeviceState *dev, int alias_id,
int required_for_version)
{
@ -641,6 +634,55 @@ void qdev_property_add_static(DeviceState *dev, Property *prop,
assert_no_error(local_err);
}
static bool device_get_realized(Object *obj, Error **err)
{
DeviceState *dev = DEVICE(obj);
return dev->realized;
}
static void device_set_realized(Object *obj, bool value, Error **err)
{
DeviceState *dev = DEVICE(obj);
DeviceClass *dc = DEVICE_GET_CLASS(dev);
Error *local_err = NULL;
if (value && !dev->realized) {
if (dc->realize) {
dc->realize(dev, &local_err);
}
if (!obj->parent && local_err == NULL) {
static int unattached_count;
gchar *name = g_strdup_printf("device[%d]", unattached_count++);
object_property_add_child(container_get(qdev_get_machine(),
"/unattached"),
name, obj, &local_err);
g_free(name);
}
if (qdev_get_vmsd(dev) && local_err == NULL) {
vmstate_register_with_alias_id(dev, -1, qdev_get_vmsd(dev), dev,
dev->instance_id_alias,
dev->alias_required_for_version);
}
if (dev->hotplugged && local_err == NULL) {
device_reset(dev);
}
} else if (!value && dev->realized) {
if (dc->unrealize) {
dc->unrealize(dev, &local_err);
}
}
if (local_err != NULL) {
error_propagate(err, local_err);
return;
}
dev->realized = value;
}
static void device_initfn(Object *obj)
{
DeviceState *dev = DEVICE(obj);
@ -655,6 +697,9 @@ static void device_initfn(Object *obj)
dev->instance_id_alias = -1;
dev->realized = false;
object_property_add_bool(obj, "realized",
device_get_realized, device_set_realized, NULL);
class = object_get_class(OBJECT(dev));
do {
for (prop = DEVICE_CLASS(class)->props; prop && prop->name; prop++) {
@ -714,7 +759,10 @@ static void device_unparent(Object *obj)
static void device_class_init(ObjectClass *class, void *data)
{
DeviceClass *dc = DEVICE_CLASS(class);
class->unparent = device_unparent;
dc->realize = device_realize;
}
void device_reset(DeviceState *dev)