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NetworkManager/src/devices/nm-device-vlan.c
Thomas Haller 850c977953 device: track system interface state in NMDevice 
When deciding whether to touch a device we sometimes look at whether
the active connection is external/assumed. In many cases however,
there is no active connection around (e.g. while moving the device
from state unmanaged to disconnected before assuming).
So in most cases we instead look at the device-state-reason to decide
whether to touch the interface (see nm_device_state_reason_check()).

Often it's desirable to have no state and passing data as function
arguments. However, the state reason has to be passed along several hops
(e.g. a queued state change). Or a change to a master/slave can affect
the slave/master, where we pass on the state reason. Or an intermediate
event might invalidate a previous state reason. Passing the state
whether to touch a device or not as a state-reason is cumbersome
and limited.

Instead, the device should be aware of whats going on. Add a
sys-iface-state with:
  - SYS_IFACE_STATE_EXTERNAL: meaning, NM should not touch it
  - SYS_IFACE_STATE_ASSUME: meaning, NM is gracefully taking over
  - SYS_IFACE_STATE_MANAGED: meaning, the device is managed by NM
  - SYS_IFACE_STATE_REMOVED: the device no longer exists

This replaces most checks of nm_device_state_reason_check() and
nm_active_connection_get_activation_type() by instead looking at
the sys-iface-state of the device.

This patch probably has still issues, but the previous behavior was
not very clear either. We will need to identify those issues in future
tests and tweak the behavior. At least, now there is one flag that
describes how to behave.
2017-03-16 18:27:33 +01:00

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/* -*- Mode: C; tab-width: 4; indent-tabs-mode: t; c-basic-offset: 4 -*- */
/* NetworkManager -- Network link manager
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Copyright 2011 - 2012 Red Hat, Inc.
*/
#include "nm-default.h"
#include "nm-device-vlan.h"
#include <sys/socket.h>
#include "nm-manager.h"
#include "nm-utils.h"
#include "NetworkManagerUtils.h"
#include "nm-device-private.h"
#include "settings/nm-settings.h"
#include "nm-act-request.h"
#include "nm-ip4-config.h"
#include "platform/nm-platform.h"
#include "nm-device-factory.h"
#include "nm-manager.h"
#include "nm-core-internal.h"
#include "platform/nmp-object.h"
#include "introspection/org.freedesktop.NetworkManager.Device.Vlan.h"
#include "nm-device-logging.h"
_LOG_DECLARE_SELF(NMDeviceVlan);
/*****************************************************************************/
NM_GOBJECT_PROPERTIES_DEFINE (NMDeviceVlan,
PROP_VLAN_ID,
);
typedef struct {
gulong parent_state_id;
gulong parent_hwaddr_id;
guint vlan_id;
} NMDeviceVlanPrivate;
struct _NMDeviceVlan {
NMDevice parent;
NMDeviceVlanPrivate _priv;
};
struct _NMDeviceVlanClass {
NMDeviceClass parent;
};
G_DEFINE_TYPE (NMDeviceVlan, nm_device_vlan, NM_TYPE_DEVICE)
#define NM_DEVICE_VLAN_GET_PRIVATE(self) _NM_GET_PRIVATE (self, NMDeviceVlan, NM_IS_DEVICE_VLAN)
/*****************************************************************************/
static void
parent_state_changed (NMDevice *parent,
NMDeviceState new_state,
NMDeviceState old_state,
NMDeviceStateReason reason,
gpointer user_data)
{
NMDeviceVlan *self = NM_DEVICE_VLAN (user_data);
/* We'll react to our own carrier state notifications. Ignore the parent's. */
if (nm_device_state_reason_check (reason) == NM_DEVICE_STATE_REASON_CARRIER)
return;
nm_device_set_unmanaged_by_flags (NM_DEVICE (self), NM_UNMANAGED_PARENT, !nm_device_get_managed (parent, FALSE), reason);
}
static void
parent_hwaddr_maybe_changed (NMDevice *parent,
GParamSpec *pspec,
gpointer user_data)
{
NMDevice *device = NM_DEVICE (user_data);
NMDeviceVlan *self = NM_DEVICE_VLAN (device);
NMConnection *connection;
const char *new_mac, *old_mac;
NMSettingIPConfig *s_ip6;
/* Never touch assumed devices */
if (nm_device_sys_iface_state_is_external_or_assume (device))
return;
connection = nm_device_get_applied_connection ((NMDevice *) self);
if (!connection)
return;
/* Update the VLAN MAC only if configuration does not specify one */
if (nm_device_hw_addr_is_explict ((NMDevice *) self))
return;
old_mac = nm_device_get_hw_address ((NMDevice *) self);
new_mac = nm_device_get_hw_address (parent);
if (nm_streq0 (old_mac, new_mac))
return;
_LOGD (LOGD_VLAN, "parent hardware address changed to %s%s%s",
NM_PRINT_FMT_QUOTE_STRING (new_mac));
if (new_mac) {
nm_device_hw_addr_set ((NMDevice *) self, new_mac, "vlan-parent", TRUE);
/* When changing the hw address the interface is taken down,
* removing the IPv6 configuration; reapply it.
*/
s_ip6 = nm_connection_get_setting_ip6_config (connection);
if (s_ip6)
nm_device_reactivate_ip6_config (NM_DEVICE (self), s_ip6, s_ip6, FALSE);
}
}
static void
parent_changed_notify (NMDevice *device,
int old_ifindex,
NMDevice *old_parent,
int new_ifindex,
NMDevice *new_parent)
{
NMDeviceVlan *self = NM_DEVICE_VLAN (device);
NMDeviceVlanPrivate *priv = NM_DEVICE_VLAN_GET_PRIVATE (self);
NM_DEVICE_CLASS (nm_device_vlan_parent_class)->parent_changed_notify (device, old_ifindex, old_parent, new_ifindex, new_parent);
/* note that @self doesn't have to clear @parent_state_id on dispose,
* because NMDevice's dispose() will unset the parent, which in turn calls
* parent_changed_notify(). */
nm_clear_g_signal_handler (old_parent, &priv->parent_state_id);
nm_clear_g_signal_handler (old_parent, &priv->parent_hwaddr_id);
if (new_parent) {
priv->parent_state_id = g_signal_connect (new_parent,
NM_DEVICE_STATE_CHANGED,
G_CALLBACK (parent_state_changed),
device);
priv->parent_hwaddr_id = g_signal_connect (new_parent, "notify::" NM_DEVICE_HW_ADDRESS,
G_CALLBACK (parent_hwaddr_maybe_changed), device);
parent_hwaddr_maybe_changed (new_parent, NULL, self);
/* Set parent-dependent unmanaged flag */
nm_device_set_unmanaged_by_flags (device,
NM_UNMANAGED_PARENT,
!nm_device_get_managed (new_parent, FALSE),
NM_DEVICE_STATE_REASON_PARENT_MANAGED_CHANGED);
}
/* Recheck availability now that the parent has changed */
if (new_ifindex > 0) {
nm_device_queue_recheck_available (device,
NM_DEVICE_STATE_REASON_PARENT_CHANGED,
NM_DEVICE_STATE_REASON_PARENT_CHANGED);
}
}
static void
update_properties (NMDevice *device)
{
NMDeviceVlanPrivate *priv;
const NMPlatformLink *plink = NULL;
const NMPlatformLnkVlan *plnk = NULL;
int ifindex;
int parent_ifindex = 0;
guint vlan_id;
g_return_if_fail (NM_IS_DEVICE_VLAN (device));
priv = NM_DEVICE_VLAN_GET_PRIVATE ((NMDeviceVlan *) device);
ifindex = nm_device_get_ifindex (device);
if (ifindex > 0)
plnk = nm_platform_link_get_lnk_vlan (NM_PLATFORM_GET, ifindex, &plink);
if ( plnk
&& plink->parent > 0)
parent_ifindex = plink->parent;
g_object_freeze_notify ((GObject *) device);
nm_device_parent_set_ifindex (device, parent_ifindex);
vlan_id = plnk ? plnk->id : 0;
if (vlan_id != priv->vlan_id) {
priv->vlan_id = vlan_id;
_notify ((NMDeviceVlan *) device, PROP_VLAN_ID);
}
g_object_thaw_notify ((GObject *) device);
}
static void
link_changed (NMDevice *device,
const NMPlatformLink *pllink)
{
NM_DEVICE_CLASS (nm_device_vlan_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)
{
NMDeviceVlanPrivate *priv = NM_DEVICE_VLAN_GET_PRIVATE ((NMDeviceVlan *) device);
const char *iface = nm_device_get_iface (device);
NMSettingVlan *s_vlan;
int parent_ifindex;
guint vlan_id;
NMPlatformError plerr;
s_vlan = nm_connection_get_setting_vlan (connection);
g_assert (s_vlan);
if (!parent) {
g_set_error (error, NM_DEVICE_ERROR, NM_DEVICE_ERROR_FAILED,
"VLAN devices can not be created without a parent interface");
return FALSE;
}
if (!nm_device_supports_vlans (parent)) {
g_set_error (error, NM_DEVICE_ERROR, NM_DEVICE_ERROR_FAILED,
"no support for VLANs on interface %s of type %s",
nm_device_get_iface (parent),
nm_device_get_type_desc (parent));
return FALSE;
}
parent_ifindex = nm_device_get_ifindex (parent);
g_warn_if_fail (parent_ifindex > 0);
vlan_id = nm_setting_vlan_get_id (s_vlan);
plerr = nm_platform_link_vlan_add (NM_PLATFORM_GET,
iface,
parent_ifindex,
vlan_id,
nm_setting_vlan_get_flags (s_vlan),
out_plink);
if (plerr != NM_PLATFORM_ERROR_SUCCESS) {
g_set_error (error, NM_DEVICE_ERROR, NM_DEVICE_ERROR_CREATION_FAILED,
"Failed to create VLAN interface '%s' for '%s': %s",
iface,
nm_connection_get_id (connection),
nm_platform_error_to_string (plerr));
return FALSE;
}
nm_device_parent_set_ifindex (device, parent_ifindex);
if (vlan_id != priv->vlan_id) {
priv->vlan_id = vlan_id;
_notify ((NMDeviceVlan *) device, PROP_VLAN_ID);
}
return TRUE;
}
static void
unrealize_notify (NMDevice *device)
{
NMDeviceVlan *self = NM_DEVICE_VLAN (device);
NMDeviceVlanPrivate *priv = NM_DEVICE_VLAN_GET_PRIVATE (self);
NM_DEVICE_CLASS (nm_device_vlan_parent_class)->unrealize_notify (device);
if (priv->vlan_id != 0) {
priv->vlan_id = 0;
_notify (self, PROP_VLAN_ID);
}
}
/*****************************************************************************/
static NMDeviceCapabilities
get_generic_capabilities (NMDevice *device)
{
/* We assume VLAN interfaces always support carrier detect */
return NM_DEVICE_CAP_CARRIER_DETECT | NM_DEVICE_CAP_IS_SOFTWARE;
}
/*****************************************************************************/
static gboolean
is_available (NMDevice *device, NMDeviceCheckDevAvailableFlags flags)
{
if (!nm_device_parent_get_device (device))
return FALSE;
return NM_DEVICE_CLASS (nm_device_vlan_parent_class)->is_available (device, flags);
}
/*****************************************************************************/
static gboolean
match_parent (NMDeviceVlan *self, const char *parent)
{
NMDevice *parent_device;
g_return_val_if_fail (parent != NULL, FALSE);
parent_device = nm_device_parent_get_device (NM_DEVICE (self));
if (!parent_device)
return FALSE;
if (nm_utils_is_uuid (parent)) {
NMActRequest *parent_req;
NMConnection *parent_connection;
/* If the parent is a UUID, the connection matches if our parent
* device has that connection activated.
*/
parent_req = nm_device_get_act_request (parent_device);
if (!parent_req)
return FALSE;
parent_connection = nm_active_connection_get_applied_connection (NM_ACTIVE_CONNECTION (parent_req));
if (!parent_connection)
return FALSE;
if (g_strcmp0 (parent, nm_connection_get_uuid (parent_connection)) != 0)
return FALSE;
} else {
/* interface name */
if (g_strcmp0 (parent, nm_device_get_ip_iface (parent_device)) != 0)
return FALSE;
}
return TRUE;
}
static gboolean
match_hwaddr (NMDevice *device, NMConnection *connection, gboolean fail_if_no_hwaddr)
{
NMSettingWired *s_wired;
NMDevice *parent_device;
const char *setting_mac;
const char *parent_mac;
s_wired = nm_connection_get_setting_wired (connection);
if (!s_wired)
return !fail_if_no_hwaddr;
setting_mac = nm_setting_wired_get_mac_address (s_wired);
if (!setting_mac)
return !fail_if_no_hwaddr;
parent_device = nm_device_parent_get_device (device);
if (!parent_device)
return !fail_if_no_hwaddr;
parent_mac = nm_device_get_permanent_hw_address (parent_device);
return parent_mac && nm_utils_hwaddr_matches (setting_mac, -1, parent_mac, -1);
}
static gboolean
check_connection_compatible (NMDevice *device, NMConnection *connection)
{
NMDeviceVlanPrivate *priv = NM_DEVICE_VLAN_GET_PRIVATE ((NMDeviceVlan *) device);
NMSettingVlan *s_vlan;
const char *parent = NULL;
if (!NM_DEVICE_CLASS (nm_device_vlan_parent_class)->check_connection_compatible (device, connection))
return FALSE;
s_vlan = nm_connection_get_setting_vlan (connection);
if (!s_vlan)
return FALSE;
/* Before the device is realized some properties will not be set */
if (nm_device_is_real (device)) {
if (nm_setting_vlan_get_id (s_vlan) != priv->vlan_id)
return FALSE;
/* Check parent interface; could be an interface name or a UUID */
parent = nm_setting_vlan_get_parent (s_vlan);
if (parent) {
if (!match_parent (NM_DEVICE_VLAN (device), parent))
return FALSE;
} else {
/* Parent could be a MAC address in an NMSettingWired */
if (!match_hwaddr (device, connection, TRUE))
return FALSE;
}
}
return TRUE;
}
static gboolean
check_connection_available (NMDevice *device,
NMConnection *connection,
NMDeviceCheckConAvailableFlags flags,
const char *specific_object)
{
if (!nm_device_is_real (device))
return TRUE;
return NM_DEVICE_CLASS (nm_device_vlan_parent_class)->check_connection_available (device, connection, flags, specific_object);
}
static gboolean
complete_connection (NMDevice *device,
NMConnection *connection,
const char *specific_object,
const GSList *existing_connections,
GError **error)
{
NMSettingVlan *s_vlan;
nm_utils_complete_generic (NM_PLATFORM_GET,
connection,
NM_SETTING_VLAN_SETTING_NAME,
existing_connections,
NULL,
_("VLAN connection"),
NULL,
TRUE);
s_vlan = nm_connection_get_setting_vlan (connection);
if (!s_vlan) {
g_set_error_literal (error, NM_DEVICE_ERROR, NM_DEVICE_ERROR_INVALID_CONNECTION,
"A 'vlan' setting is required.");
return FALSE;
}
/* If there's no VLAN interface, no parent, and no hardware address in the
* settings, then there's not enough information to complete the setting.
*/
if ( !nm_setting_vlan_get_parent (s_vlan)
&& !match_hwaddr (device, connection, TRUE)) {
g_set_error_literal (error, NM_DEVICE_ERROR, NM_DEVICE_ERROR_INVALID_CONNECTION,
"The 'vlan' setting had no interface name, parent, or hardware address.");
return FALSE;
}
return TRUE;
}
static void
update_connection (NMDevice *device, NMConnection *connection)
{
NMDeviceVlanPrivate *priv = NM_DEVICE_VLAN_GET_PRIVATE ((NMDeviceVlan *) device);
NMSettingVlan *s_vlan = nm_connection_get_setting_vlan (connection);
int ifindex = nm_device_get_ifindex (device);
const char *setting_parent, *new_parent;
const NMPlatformLink *plink;
const NMPObject *polnk;
NMDevice *parent_device;
guint vlan_id;
guint vlan_flags;
if (!s_vlan) {
s_vlan = (NMSettingVlan *) nm_setting_vlan_new ();
nm_connection_add_setting (connection, (NMSetting *) s_vlan);
}
polnk = nm_platform_link_get_lnk (NM_PLATFORM_GET, ifindex, NM_LINK_TYPE_VLAN, &plink);
if (polnk)
vlan_id = polnk->lnk_vlan.id;
else
vlan_id = priv->vlan_id;
if (vlan_id != nm_setting_vlan_get_id (s_vlan))
g_object_set (s_vlan, NM_SETTING_VLAN_ID, vlan_id, NULL);
/* Update parent in the connection; default to parent's interface name */
parent_device = nm_device_parent_get_device (device);
if ( parent_device
&& polnk
&& plink->parent > 0
&& nm_device_get_ifindex (parent_device) == plink->parent) {
new_parent = nm_device_get_iface (parent_device);
setting_parent = nm_setting_vlan_get_parent (s_vlan);
if (setting_parent && nm_utils_is_uuid (setting_parent)) {
NMConnection *parent_connection;
/* Don't change a parent specified by UUID if it's still valid */
parent_connection = (NMConnection *) nm_settings_get_connection_by_uuid (nm_device_get_settings (device), setting_parent);
if (parent_connection && nm_device_check_connection_compatible (parent_device, parent_connection))
new_parent = NULL;
}
if (new_parent)
g_object_set (s_vlan, NM_SETTING_VLAN_PARENT, new_parent, NULL);
} else
g_object_set (s_vlan, NM_SETTING_VLAN_PARENT, NULL, NULL);
if (polnk)
vlan_flags = polnk->lnk_vlan.flags;
else
vlan_flags = NM_VLAN_FLAG_REORDER_HEADERS;
if (vlan_flags != nm_setting_vlan_get_flags (s_vlan))
g_object_set (s_vlan, NM_SETTING_VLAN_FLAGS, (NMVlanFlags) vlan_flags, NULL);
if (polnk) {
_nm_setting_vlan_set_priorities (s_vlan, NM_VLAN_INGRESS_MAP,
polnk->_lnk_vlan.ingress_qos_map,
polnk->_lnk_vlan.n_ingress_qos_map);
_nm_setting_vlan_set_priorities (s_vlan, NM_VLAN_EGRESS_MAP,
polnk->_lnk_vlan.egress_qos_map,
polnk->_lnk_vlan.n_egress_qos_map);
} else {
_nm_setting_vlan_set_priorities (s_vlan, NM_VLAN_INGRESS_MAP, NULL, 0);
_nm_setting_vlan_set_priorities (s_vlan, NM_VLAN_EGRESS_MAP, NULL, 0);
}
}
static NMActStageReturn
act_stage1_prepare (NMDevice *device, NMDeviceStateReason *out_failure_reason)
{
NMDevice *parent_device;
NMSettingVlan *s_vlan;
NMActStageReturn ret;
ret = NM_DEVICE_CLASS (nm_device_vlan_parent_class)->act_stage1_prepare (device, out_failure_reason);
if (ret != NM_ACT_STAGE_RETURN_SUCCESS)
return ret;
if (!nm_device_hw_addr_set_cloned (device, nm_device_get_applied_connection (device), FALSE))
return NM_ACT_STAGE_RETURN_FAILURE;
/* Change MAC address to parent's one if needed */
parent_device = nm_device_parent_get_device (device);
if (parent_device)
parent_hwaddr_maybe_changed (parent_device, NULL, device);
s_vlan = (NMSettingVlan *) nm_device_get_applied_setting (device, NM_TYPE_SETTING_VLAN);
if (s_vlan) {
gs_free NMVlanQosMapping *ingress_map = NULL;
gs_free NMVlanQosMapping *egress_map = NULL;
guint n_ingress_map = 0, n_egress_map = 0;
_nm_setting_vlan_get_priorities (s_vlan,
NM_VLAN_INGRESS_MAP,
&ingress_map,
&n_ingress_map);
_nm_setting_vlan_get_priorities (s_vlan,
NM_VLAN_EGRESS_MAP,
&egress_map,
&n_egress_map);
nm_platform_link_vlan_change (NM_PLATFORM_GET,
nm_device_get_ifindex (device),
NM_VLAN_FLAGS_ALL,
nm_setting_vlan_get_flags (s_vlan),
TRUE,
ingress_map,
n_ingress_map,
TRUE,
egress_map,
n_egress_map);
}
return ret;
}
static guint32
get_configured_mtu (NMDevice *self, gboolean *out_is_user_config)
{
guint32 mtu = 0;
int ifindex;
mtu = nm_device_get_configured_mtu_for_wired (self, out_is_user_config);
if (*out_is_user_config)
return mtu;
/* Inherit the MTU from parent device, if any */
ifindex = nm_device_parent_get_ifindex (self);
if (ifindex > 0)
mtu = nm_platform_link_get_mtu (NM_PLATFORM_GET, ifindex);
return mtu ?: NM_DEVICE_DEFAULT_MTU_WIRED;
}
/*****************************************************************************/
static void
get_property (GObject *object, guint prop_id,
GValue *value, GParamSpec *pspec)
{
NMDeviceVlanPrivate *priv = NM_DEVICE_VLAN_GET_PRIVATE ((NMDeviceVlan *) object);
switch (prop_id) {
case PROP_VLAN_ID:
g_value_set_uint (value, priv->vlan_id);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
/*****************************************************************************/
static void
nm_device_vlan_init (NMDeviceVlan * self)
{
}
static void
nm_device_vlan_class_init (NMDeviceVlanClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
NMDeviceClass *parent_class = NM_DEVICE_CLASS (klass);
NM_DEVICE_CLASS_DECLARE_TYPES (klass, NM_SETTING_VLAN_SETTING_NAME, NM_LINK_TYPE_VLAN)
object_class->get_property = get_property;
parent_class->create_and_realize = create_and_realize;
parent_class->link_changed = link_changed;
parent_class->unrealize_notify = unrealize_notify;
parent_class->get_generic_capabilities = get_generic_capabilities;
parent_class->act_stage1_prepare = act_stage1_prepare;
parent_class->get_configured_mtu = get_configured_mtu;
parent_class->is_available = is_available;
parent_class->parent_changed_notify = parent_changed_notify;
parent_class->check_connection_compatible = check_connection_compatible;
parent_class->check_connection_available = check_connection_available;
parent_class->complete_connection = complete_connection;
parent_class->update_connection = update_connection;
obj_properties[PROP_VLAN_ID] =
g_param_spec_uint (NM_DEVICE_VLAN_ID, "", "",
0, 4095, 0,
G_PARAM_READABLE
| G_PARAM_STATIC_STRINGS);
g_object_class_install_properties (object_class, _PROPERTY_ENUMS_LAST, obj_properties);
nm_exported_object_class_add_interface (NM_EXPORTED_OBJECT_CLASS (klass),
NMDBUS_TYPE_DEVICE_VLAN_SKELETON,
NULL);
}
/*****************************************************************************/
#define NM_TYPE_VLAN_DEVICE_FACTORY (nm_vlan_device_factory_get_type ())
#define NM_VLAN_DEVICE_FACTORY(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), NM_TYPE_VLAN_DEVICE_FACTORY, NMVlanDeviceFactory))
static NMDevice *
create_device (NMDeviceFactory *factory,
const char *iface,
const NMPlatformLink *plink,
NMConnection *connection,
gboolean *out_ignore)
{
return (NMDevice *) g_object_new (NM_TYPE_DEVICE_VLAN,
NM_DEVICE_IFACE, iface,
NM_DEVICE_DRIVER, "8021q",
NM_DEVICE_TYPE_DESC, "VLAN",
NM_DEVICE_DEVICE_TYPE, NM_DEVICE_TYPE_VLAN,
NM_DEVICE_LINK_TYPE, NM_LINK_TYPE_VLAN,
NULL);
}
static const char *
get_connection_parent (NMDeviceFactory *factory, NMConnection *connection)
{
NMSettingVlan *s_vlan;
NMSettingWired *s_wired;
const char *parent = NULL;
g_return_val_if_fail (nm_connection_is_type (connection, NM_SETTING_VLAN_SETTING_NAME), NULL);
s_vlan = nm_connection_get_setting_vlan (connection);
g_assert (s_vlan);
parent = nm_setting_vlan_get_parent (s_vlan);
if (parent)
return parent;
/* Try the hardware address from the VLAN connection's hardware setting */
s_wired = nm_connection_get_setting_wired (connection);
if (s_wired)
return nm_setting_wired_get_mac_address (s_wired);
return NULL;
}
static char *
get_connection_iface (NMDeviceFactory *factory,
NMConnection *connection,
const char *parent_iface)
{
const char *ifname;
NMSettingVlan *s_vlan;
g_return_val_if_fail (nm_connection_is_type (connection, NM_SETTING_VLAN_SETTING_NAME), NULL);
s_vlan = nm_connection_get_setting_vlan (connection);
g_assert (s_vlan);
if (!parent_iface)
return NULL;
ifname = nm_connection_get_interface_name (connection);
if (ifname)
return g_strdup (ifname);
/* If the connection doesn't specify the interface name for the VLAN
* device, we create one for it using the VLAN ID and the parent
* interface's name.
*/
return nm_utils_new_vlan_name (parent_iface, nm_setting_vlan_get_id (s_vlan));
}
NM_DEVICE_FACTORY_DEFINE_INTERNAL (VLAN, Vlan, vlan,
NM_DEVICE_FACTORY_DECLARE_LINK_TYPES (NM_LINK_TYPE_VLAN)
NM_DEVICE_FACTORY_DECLARE_SETTING_TYPES (NM_SETTING_VLAN_SETTING_NAME),
factory_class->create_device = create_device;
factory_class->get_connection_parent = get_connection_parent;
factory_class->get_connection_iface = get_connection_iface;
);
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