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qdev: Create qdev_get_device_class() function 

Extract the DeviceClass lookup from qdev_device_add() to a separate
function.

Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
Signed-off-by: Andreas Färber <afaerber@suse.de>
This commit is contained in:
Eduardo Habkost 2014-11-01 13:56:09 -02:00 committed by Andreas Färber
parent 1bc8dae31b
commit 43c95d782d
1 changed files with 42 additions and 28 deletions
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70
qdev-monitor.c
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@ -180,6 +180,44 @@ static const char *find_typename_by_alias(const char *alias)
return NULL;
}
static DeviceClass *qdev_get_device_class(const char **driver, Error **errp)
{
ObjectClass *oc;
DeviceClass *dc;
oc = object_class_by_name(*driver);
if (!oc) {
const char *typename = find_typename_by_alias(*driver);
if (typename) {
*driver = typename;
oc = object_class_by_name(*driver);
}
}
if (!object_class_dynamic_cast(oc, TYPE_DEVICE)) {
error_setg(errp, "'%s' is not a valid device model name", *driver);
return NULL;
}
if (object_class_is_abstract(oc)) {
error_set(errp, QERR_INVALID_PARAMETER_VALUE, "driver",
"non-abstract device type");
return NULL;
}
dc = DEVICE_CLASS(oc);
if (dc->cannot_instantiate_with_device_add_yet ||
(qdev_hotplug && !dc->hotpluggable)) {
error_set(errp, QERR_INVALID_PARAMETER_VALUE, "driver",
"pluggable device type");
return NULL;
}
return dc;
}
int qdev_device_help(QemuOpts *opts)
{
Error *local_err = NULL;
@ -455,7 +493,6 @@ static BusState *qbus_find(const char *path)
DeviceState *qdev_device_add(QemuOpts *opts)
{
ObjectClass *oc;
DeviceClass *dc;
const char *driver, *path, *id;
DeviceState *dev;
@ -469,33 +506,10 @@ DeviceState *qdev_device_add(QemuOpts *opts)
}
/* find driver */
oc = object_class_by_name(driver);
if (!oc) {
const char *typename = find_typename_by_alias(driver);
if (typename) {
driver = typename;
oc = object_class_by_name(driver);
}
}
if (!object_class_dynamic_cast(oc, TYPE_DEVICE)) {
qerror_report(ERROR_CLASS_GENERIC_ERROR,
"'%s' is not a valid device model name", driver);
return NULL;
}
if (object_class_is_abstract(oc)) {
qerror_report(QERR_INVALID_PARAMETER_VALUE, "driver",
"non-abstract device type");
return NULL;
}
dc = DEVICE_CLASS(oc);
if (dc->cannot_instantiate_with_device_add_yet ||
(qdev_hotplug && !dc->hotpluggable)) {
qerror_report(QERR_INVALID_PARAMETER_VALUE, "driver",
"pluggable device type");
dc = qdev_get_device_class(&driver, &err);
if (err) {
qerror_report_err(err);
error_free(err);
return NULL;
}