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NetworkManager/src/devices/nm-device-vlan.c
Beniamino Galvani d2e4a2f639 device: deduplicate match_hwaddr()
2017-09-28 10:54:01 +02:00

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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_device_get_platform (device), 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_MISSING_DEPENDENCIES,
"VLAN devices can not be created without a parent interface");
return FALSE;
}
parent_ifindex = nm_device_get_ifindex (parent);
if (parent_ifindex <= 0) {
g_set_error (error, NM_DEVICE_ERROR, NM_DEVICE_ERROR_MISSING_DEPENDENCIES,
"cannot retrieve ifindex of interface %s (%s)",
nm_device_get_iface (parent),
nm_device_get_type_desc (parent));
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;
}
vlan_id = nm_setting_vlan_get_id (s_vlan);
plerr = nm_platform_link_vlan_add (nm_device_get_platform (device),
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_a (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
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 (!nm_device_match_parent (device, parent))
return FALSE;
} else {
/* Parent could be a MAC address in an NMSettingWired */
if (!nm_device_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_device_get_platform (device),
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)
&& !nm_device_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_device_get_platform (device), 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_device_get_platform (device),
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_device_get_platform (NM_DEVICE (self)), ifindex);
return mtu;
}
/*****************************************************************************/
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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