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core: add version-id to NMActiveConnection

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This field will be later used by NMDevice's Reapply and
GetAppliedConnection methods. The usecase is to first fetch
the currently applied connection, adjust it and reapply it.
Using the version-id, a concurrent modification can be detected
and Reapply can reject the invocation.
This commit is contained in:
Thomas Haller 2016-02-11 08:36:39 +01:00
parent 4b76d86698
commit b96a40c2ec
3 changed files with 54 additions and 5 deletions
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17
src/devices/nm-device.c
View file

@ -7181,6 +7181,7 @@ reapply_connection (NMDevice *self,
NMConnection *con_old, *con_new;
NMSettingIPConfig *s_ip4_old, *s_ip4_new;
NMSettingIPConfig *s_ip6_old, *s_ip6_new;
guint64 version_id;
if (priv->state != NM_DEVICE_STATE_ACTIVATED) {
g_set_error_literal (error,
@ -7212,12 +7213,17 @@ reapply_connection (NMDevice *self,
NM_SETTING_CONNECTION_METERED))
return FALSE;
_LOGD (LOGD_DEVICE, "reapply");
/**************************************************************************
* Update applied connection
*************************************************************************/
if (diffs)
nm_active_connection_version_id_bump ((NMActiveConnection *) priv->act_request);
_LOGD (LOGD_DEVICE, "reapply (version-id %llu%s)",
(long long unsigned) nm_active_connection_version_id_get (((NMActiveConnection *) priv->act_request)),
diffs ? "" : " (unmodified)");
if (diffs) {
con_old = applied_clone = nm_simple_connection_new_clone (applied);
con_new = applied;
@ -9218,6 +9224,7 @@ nm_device_reapply_settings_immediately (NMDevice *self)
NMSettingConnection *s_con_applied;
const char *zone;
NMMetered metered;
guint64 version_id;
g_return_if_fail (NM_IS_DEVICE (self));
@ -9240,7 +9247,8 @@ nm_device_reapply_settings_immediately (NMDevice *self)
if (g_strcmp0 ((zone = nm_setting_connection_get_zone (s_con_settings)),
nm_setting_connection_get_zone (s_con_applied)) != 0) {
_LOGD (LOGD_DEVICE, "reapply setting: zone = %s%s%s", NM_PRINT_FMT_QUOTE_STRING (zone));
version_id = nm_active_connection_version_id_bump ((NMActiveConnection *) self->priv->act_request);
_LOGD (LOGD_DEVICE, "reapply setting: zone = %s%s%s (version-id %llu)", NM_PRINT_FMT_QUOTE_STRING (zone), (long long unsigned) version_id);
g_object_set (G_OBJECT (s_con_applied),
NM_SETTING_CONNECTION_ZONE, zone,
@ -9251,7 +9259,8 @@ nm_device_reapply_settings_immediately (NMDevice *self)
if ((metered = nm_setting_connection_get_metered (s_con_settings)) != nm_setting_connection_get_metered (s_con_applied)) {
_LOGD (LOGD_DEVICE, "reapply setting: metered = %d", (int) metered);
version_id = nm_active_connection_version_id_bump ((NMActiveConnection *) self->priv->act_request);
_LOGD (LOGD_DEVICE, "reapply setting: metered = %d (version-id %llu)", (int) metered, (long long unsigned) version_id);
g_object_set (G_OBJECT (s_con_applied),
NM_SETTING_CONNECTION_METERED, metered,

39
src/nm-active-connection.c
View file

@ -46,6 +46,8 @@ typedef struct {
char *specific_object;
NMDevice *device;
guint64 version_id;
char *pending_activation_id;
gboolean is_default;
@ -796,10 +798,45 @@ nm_active_connection_authorize (NMActiveConnection *self,
/****************************************************************/
static guint64
_version_id_new (void)
{
static guint64 id = 0;
return ++id;
}
guint64
nm_active_connection_version_id_get (NMActiveConnection *self)
{
g_return_val_if_fail (NM_IS_ACTIVE_CONNECTION (self), 0);
return NM_ACTIVE_CONNECTION_GET_PRIVATE (self)->version_id;
}
guint64
nm_active_connection_version_id_bump (NMActiveConnection *self)
{
NMActiveConnectionPrivate *priv;
g_return_val_if_fail (NM_IS_ACTIVE_CONNECTION (self), 0);
priv = NM_ACTIVE_CONNECTION_GET_PRIVATE (self);
priv->version_id = _version_id_new ();
_LOGT ("new version-id %llu", (long long unsigned) priv->version_id);
return priv->version_id;
}
/****************************************************************/
static void
nm_active_connection_init (NMActiveConnection *self)
{
NMActiveConnectionPrivate *priv = NM_ACTIVE_CONNECTION_GET_PRIVATE (self);
_LOGT ("creating");
priv->version_id = _version_id_new ();
}
static void
@ -810,7 +847,7 @@ constructed (GObject *object)
G_OBJECT_CLASS (nm_active_connection_parent_class)->constructed (object);
_LOGD ("constructed (%s)", G_OBJECT_TYPE_NAME (self));
_LOGD ("constructed (%s, version-id %llu)", G_OBJECT_TYPE_NAME (self), (long long unsigned) priv->version_id);
g_return_if_fail (priv->subject);
}

3
src/nm-active-connection.h
View file

@ -83,6 +83,9 @@ typedef struct {
NMMetered new_value);
} NMActiveConnectionClass;
guint64 nm_active_connection_version_id_get (NMActiveConnection *self);
guint64 nm_active_connection_version_id_bump (NMActiveConnection *self);
GType nm_active_connection_get_type (void);
typedef void (*NMActiveConnectionAuthResultFunc) (NMActiveConnection *self,