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/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
* Copyright (C) 2013 Red Hat, Inc.
*/
#include "src/core/nm-default-daemon.h"
#include <stdlib.h>
#include "libnm-core-intern/nm-core-internal.h"
#include "nm-device-veth.h"
#include "nm-device-private.h"
#include "nm-manager.h"
#include "libnm-platform/nm-platform.h"
#include "nm-device-factory.h"
#include "nm-setting-veth.h"
#define _NMLOG_DEVICE_TYPE NMDeviceVeth
#include "nm-device-logging.h"
/*****************************************************************************/
struct _NMDeviceVeth {
NMDeviceEthernet parent;
};
struct _NMDeviceVethClass {
NMDeviceEthernetClass parent;
};
NM_GOBJECT_PROPERTIES_DEFINE(NMDeviceVeth, PROP_PEER, );
/*****************************************************************************/
G_DEFINE_TYPE(NMDeviceVeth, nm_device_veth, NM_TYPE_DEVICE_ETHERNET)
/*****************************************************************************/
static void
update_properties(NMDevice *device)
{
NMDevice *peer;
int ifindex, peer_ifindex;
ifindex = nm_device_get_ifindex(device);
if (ifindex <= 0
|| !nm_platform_link_veth_get_properties(nm_device_get_platform(device),
ifindex,
&peer_ifindex))
peer_ifindex = 0;
nm_device_parent_set_ifindex(device, peer_ifindex);
peer = nm_device_parent_get_device(device);
if (peer && NM_IS_DEVICE_VETH(peer) && nm_device_parent_get_ifindex(peer) <= 0)
update_properties(peer);
}
static gboolean
can_unmanaged_external_down(NMDevice *self)
{
/* Unless running in a container, an udev rule causes these to be
* unmanaged. If there's no udev then we're probably in a container
* and should IFF_UP and configure the veth ourselves even if we
* didn't create it. */
return FALSE;
}
static void
link_changed(NMDevice *device, const NMPlatformLink *pllink)
{
NM_DEVICE_CLASS(nm_device_veth_parent_class)->link_changed(device, pllink);
update_properties(device);
}
static gboolean
create_and_realize(NMDevice *device,
NMConnection *connection,
NMDevice *parent,
const NMPlatformLink **out_plink,
GError **error)
{
const char *iface = nm_device_get_iface(device);
const char *peer;
NMDevice *peer_device;
NMSettingVeth *s_veth;
int r;
s_veth = _nm_connection_get_setting(connection, NM_TYPE_SETTING_VETH);
if (!s_veth) {
g_set_error(error,
NM_DEVICE_ERROR,
NM_DEVICE_ERROR_CREATION_FAILED,
"Profile %s (%s) is not a suitable veth profile",
nm_connection_get_id(connection),
nm_connection_get_uuid(connection));
return FALSE;
}
peer = nm_setting_veth_get_peer(s_veth);
peer_device = nm_manager_get_device(NM_MANAGER_GET, peer, NM_DEVICE_TYPE_VETH);
if (peer_device) {
if (nm_device_parent_get_device(peer_device))
/* The veth device and its peer already exist. No need to create it again. */
return TRUE;
}
r = nm_platform_link_veth_add(nm_device_get_platform(device), iface, peer, out_plink);
if (r < 0) {
g_set_error(error,
NM_DEVICE_ERROR,
NM_DEVICE_ERROR_CREATION_FAILED,
"Failed to create veth interface '%s' for '%s': %s",
iface,
nm_connection_get_id(connection),
nm_strerror(r));
return FALSE;
}
return TRUE;
}
/*****************************************************************************/
static NMDeviceCapabilities
get_generic_capabilities(NMDevice *device)
{
return NM_DEVICE_CAP_CARRIER_DETECT | NM_DEVICE_CAP_IS_SOFTWARE;
}
/*****************************************************************************/
static void
nm_device_veth_init(NMDeviceVeth *self)
{}
static void
parent_changed_notify(NMDevice *device,
int old_ifindex,
NMDevice *old_parent,
int new_ifindex,
NMDevice *new_parent)
{
NM_DEVICE_CLASS(nm_device_veth_parent_class)
->parent_changed_notify(device, old_ifindex, old_parent, new_ifindex, new_parent);
_notify(NM_DEVICE_VETH(device), PROP_PEER);
}
static void
get_property(GObject *object, guint prop_id, GValue *value, GParamSpec *pspec)
{
NMDeviceVeth *self = NM_DEVICE_VETH(object);
NMDevice *peer;
switch (prop_id) {
case PROP_PEER:
peer = nm_device_parent_get_device(NM_DEVICE(self));
if (peer && !NM_IS_DEVICE_VETH(peer))
peer = NULL;
nm_dbus_utils_g_value_set_object_path(value, peer);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID(object, prop_id, pspec);
break;
}
}
static const NMDBusInterfaceInfoExtended interface_info_device_veth = {
.parent = NM_DEFINE_GDBUS_INTERFACE_INFO_INIT(
NM_DBUS_INTERFACE_DEVICE_VETH,
.properties = NM_DEFINE_GDBUS_PROPERTY_INFOS(
NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE("Peer", "o", NM_DEVICE_VETH_PEER), ), ),
};
static void
nm_device_veth_class_init(NMDeviceVethClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS(klass);
NMDBusObjectClass *dbus_object_class = NM_DBUS_OBJECT_CLASS(klass);
NMDeviceClass *device_class = NM_DEVICE_CLASS(klass);
object_class->get_property = get_property;
dbus_object_class->interface_infos = NM_DBUS_INTERFACE_INFOS(&interface_info_device_veth);
device_class->connection_type_supported = NULL;
device_class->link_types = NM_DEVICE_DEFINE_LINK_TYPES(NM_LINK_TYPE_VETH);
device_class->can_unmanaged_external_down = can_unmanaged_external_down;
device_class->link_changed = link_changed;
device_class->parent_changed_notify = parent_changed_notify;
device_class->create_and_realize = create_and_realize;
device_class->get_generic_capabilities = get_generic_capabilities;
obj_properties[PROP_PEER] = g_param_spec_string(NM_DEVICE_VETH_PEER,
"",
"",
NULL,
G_PARAM_READABLE | G_PARAM_STATIC_STRINGS);
g_object_class_install_properties(object_class, _PROPERTY_ENUMS_LAST, obj_properties);
}
/*****************************************************************************/
#define NM_TYPE_VETH_DEVICE_FACTORY (nm_veth_device_factory_get_type())
#define NM_VETH_DEVICE_FACTORY(obj) \
(_NM_G_TYPE_CHECK_INSTANCE_CAST((obj), NM_TYPE_VETH_DEVICE_FACTORY, NMVethDeviceFactory))
static NMDevice *
create_device(NMDeviceFactory *factory,
const char *iface,
const NMPlatformLink *plink,
NMConnection *connection,
gboolean *out_ignore)
{
return g_object_new(NM_TYPE_DEVICE_VETH,
NM_DEVICE_IFACE,
iface,
NM_DEVICE_TYPE_DESC,
"Veth",
NM_DEVICE_DEVICE_TYPE,
NM_DEVICE_TYPE_VETH,
NM_DEVICE_LINK_TYPE,
NM_LINK_TYPE_VETH,
NULL);
}
NM_DEVICE_FACTORY_DEFINE_INTERNAL(
VETH,
Veth,
veth,
NM_DEVICE_FACTORY_DECLARE_LINK_TYPES(NM_LINK_TYPE_VETH)
NM_DEVICE_FACTORY_DECLARE_SETTING_TYPES(NM_SETTING_VETH_SETTING_NAME),
factory_class->create_device = create_device;);
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