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265b578c58
A link property can be set during creation, with object_property_add_link() and later with object_property_set_link(). add_link() doesn't add a reference to the target object, while set_link() does. Furthemore, OBJ_PROP_LINK_UNREF_ON_RELEASE flags, set during add_link, says whether a reference must be released when the property is destroyed. This can lead to leaks if the property was later set_link(), as the added reference is never released. Instead, rename OBJ_PROP_LINK_UNREF_ON_RELEASE to OBJ_PROP_LINK_STRONG and use that has an indication on how the link handle reference management in set_link(). Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com> Message-id: 20180531195119.22021-3-marcandre.lureau@redhat.com Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
113 lines
3.3 KiB
C
113 lines
3.3 KiB
C
/*
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* CAN generic CAN host connection support
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*
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* Copyright (c) 2013-2014 Jin Yang
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* Copyright (c) 2014-2018 Pavel Pisa
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*
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* Initial development supported by Google GSoC 2013 from RTEMS project slot
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include "qemu/osdep.h"
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#include "chardev/char.h"
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#include "qemu/sockets.h"
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#include "qapi/error.h"
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#include "qom/object_interfaces.h"
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#include "net/can_emu.h"
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#include "net/can_host.h"
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struct CanBusState {
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Object object;
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QTAILQ_HEAD(, CanBusClientState) clients;
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};
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static void can_host_disconnect(CanHostState *ch)
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{
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CanHostClass *chc = CAN_HOST_GET_CLASS(ch);
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can_bus_remove_client(&ch->bus_client);
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chc->disconnect(ch);
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}
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static void can_host_connect(CanHostState *ch, Error **errp)
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{
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CanHostClass *chc = CAN_HOST_GET_CLASS(ch);
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Error *local_err = NULL;
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chc->connect(ch, &local_err);
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if (local_err) {
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error_propagate(errp, local_err);
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return;
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}
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can_bus_insert_client(ch->bus, &ch->bus_client);
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}
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static void can_host_unparent(Object *obj)
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{
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can_host_disconnect(CAN_HOST(obj));
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}
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static void can_host_complete(UserCreatable *uc, Error **errp)
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{
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can_host_connect(CAN_HOST(uc), errp);
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}
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static void can_host_instance_init(Object *obj)
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{
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CanHostState *ch = CAN_HOST(obj);
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object_property_add_link(obj, "canbus", TYPE_CAN_BUS,
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(Object **)&ch->bus,
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object_property_allow_set_link,
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OBJ_PROP_LINK_STRONG,
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&error_abort);
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}
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static void can_host_class_init(ObjectClass *klass,
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void *class_data G_GNUC_UNUSED)
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{
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UserCreatableClass *uc_klass = USER_CREATABLE_CLASS(klass);
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klass->unparent = can_host_unparent;
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uc_klass->complete = can_host_complete;
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}
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static const TypeInfo can_host_info = {
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.parent = TYPE_OBJECT,
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.name = TYPE_CAN_HOST,
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.instance_size = sizeof(CanHostState),
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.class_size = sizeof(CanHostClass),
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.abstract = true,
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.instance_init = can_host_instance_init,
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.class_init = can_host_class_init,
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.interfaces = (InterfaceInfo[]) {
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{ TYPE_USER_CREATABLE },
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{ }
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}
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};
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static void can_host_register_types(void)
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{
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type_register_static(&can_host_info);
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}
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type_init(can_host_register_types);
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