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libnm: merge branch 'th/libnm-client-async-revert'

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Revert the change to initialize the GDBusObjectManager
synchronously. I still maintain that GDBusObjectManager's
async initialization is severely broken on it's own, but this
change broke

  $ systemctl restart NetworkManager
  $ nmcli connection up "$NAME"

leaving nmcli hanging, as libnm fails to process some D-Bus signals.
I think that hints to another bug, but apparently the previous
version was less broken. So revert for now.

https://bugzilla.redhat.com/show_bug.cgi?id=1450075
This commit is contained in:
Thomas Haller 2017-06-29 09:59:13 +02:00
commit 95ff2b8e8a
1 changed files with 58 additions and 60 deletions
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118
libnm/nm-client.c
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@ -91,6 +91,13 @@ G_DEFINE_TYPE_WITH_CODE (NMClient, nm_client, G_TYPE_OBJECT,
#define NM_CLIENT_GET_PRIVATE(o) (G_TYPE_INSTANCE_GET_PRIVATE ((o), NM_TYPE_CLIENT, NMClientPrivate))
typedef struct {
NMClient *client;
GCancellable *cancellable;
GSimpleAsyncResult *result;
int pending_init;
} NMClientInitData;
typedef struct {
NMManager *manager;
NMRemoteSettings *settings;
@ -2267,13 +2274,23 @@ objects_created (NMClient *client, GDBusObjectManager *object_manager, GError **
static void name_owner_changed (GObject *object, GParamSpec *pspec, gpointer user_data);
static gboolean
_om_has_name_owner (GDBusObjectManager *object_manager)
{
gs_free char *name_owner = NULL;
nm_assert (G_IS_DBUS_OBJECT_MANAGER_CLIENT (object_manager));
name_owner = g_dbus_object_manager_client_get_name_owner (G_DBUS_OBJECT_MANAGER_CLIENT (object_manager));
return !!name_owner;
}
static gboolean
init_sync (GInitable *initable, GCancellable *cancellable, GError **error)
{
NMClient *client = NM_CLIENT (initable);
NMClientPrivate *priv = NM_CLIENT_GET_PRIVATE (client);
GList *objects, *iter;
gchar *name_owner;
priv->object_manager = g_dbus_object_manager_client_new_for_bus_sync (_nm_dbus_bus_type (),
G_DBUS_OBJECT_MANAGER_CLIENT_FLAGS_DO_NOT_AUTO_START,
@ -2285,9 +2302,7 @@ init_sync (GInitable *initable, GCancellable *cancellable, GError **error)
if (!priv->object_manager)
return FALSE;
name_owner = g_dbus_object_manager_client_get_name_owner (G_DBUS_OBJECT_MANAGER_CLIENT (priv->object_manager));
if (name_owner) {
g_free (name_owner);
if (_om_has_name_owner (priv->object_manager)) {
if (!objects_created (client, priv->object_manager, error))
return FALSE;
@ -2316,21 +2331,14 @@ init_sync (GInitable *initable, GCancellable *cancellable, GError **error)
/* Asynchronous initialization. */
typedef struct {
NMClient *client;
GCancellable *cancellable;
GSimpleAsyncResult *result;
int pending_init;
guint idle_init_id;
} NMClientInitData;
static void
init_async_complete (NMClientInitData *init_data)
{
if (init_data->pending_init > 0)
return;
g_simple_async_result_complete (init_data->result);
g_object_unref (init_data->result);
g_clear_object (&init_data->cancellable);
nm_clear_g_source (&init_data->idle_init_id);
g_slice_free (NMClientInitData, init_data);
}
@ -2340,14 +2348,13 @@ async_inited_obj_nm (GObject *object, GAsyncResult *result, gpointer user_data)
NMClientInitData *init_data = user_data;
GError *error = NULL;
nm_assert (init_data && init_data->pending_init > 0);
if (!g_async_initable_init_finish (G_ASYNC_INITABLE (object), result, &error))
g_simple_async_result_take_error (init_data->result, error);
if (init_data) {
init_data->pending_init--;
if (init_data->pending_init == 0)
init_async_complete (init_data);
}
init_data->pending_init--;
init_async_complete (init_data);
}
static void
@ -2407,48 +2414,40 @@ unhook_om (NMClient *self)
static void
new_object_manager (GObject *source_object, GAsyncResult *res, gpointer user_data)
{
NMClientPrivate *priv = NM_CLIENT_GET_PRIVATE (source_object);
NMClient *self = NM_CLIENT (user_data);
NMClientPrivate *priv = NM_CLIENT_GET_PRIVATE (self);
g_object_notify (G_OBJECT (user_data), NM_CLIENT_NM_RUNNING);
g_clear_object (&priv->new_object_manager_cancellable);
g_object_notify (G_OBJECT (user_data), NM_CLIENT_NM_RUNNING);
}
static gboolean
got_object_manager (gpointer user_data)
static void
got_object_manager (GObject *object, GAsyncResult *result, gpointer user_data)
{
NMClientInitData *init_data = user_data;
NMClient *client;
NMClientPrivate *priv;
GList *objects, *iter;
gchar *name_owner;
GError *error = NULL;
GDBusObjectManager *object_manager;
init_data->idle_init_id = 0;
if (g_cancellable_set_error_if_cancelled (init_data->cancellable,
&error))
goto out_take_error;
object_manager = g_dbus_object_manager_client_new_for_bus_sync (_nm_dbus_bus_type (),
G_DBUS_OBJECT_MANAGER_CLIENT_FLAGS_DO_NOT_AUTO_START,
"org.freedesktop.NetworkManager",
"/org/freedesktop",
proxy_type, NULL, NULL,
init_data->cancellable,
&error);
if (!object_manager)
goto out_take_error;
object_manager = g_dbus_object_manager_client_new_for_bus_finish (result, &error);
if (object_manager == NULL) {
g_simple_async_result_take_error (init_data->result, error);
init_async_complete (init_data);
return;
}
client = init_data->client;
priv = NM_CLIENT_GET_PRIVATE (client);
priv->object_manager = object_manager;
name_owner = g_dbus_object_manager_client_get_name_owner (G_DBUS_OBJECT_MANAGER_CLIENT (priv->object_manager));
if (name_owner) {
g_free (name_owner);
if (!objects_created (client, priv->object_manager, &error))
goto out_take_error;
if (_om_has_name_owner (priv->object_manager)) {
if (!objects_created (client, priv->object_manager, &error)) {
g_simple_async_result_take_error (init_data->result, error);
init_async_complete (init_data);
return;
}
objects = g_dbus_object_manager_get_objects (priv->object_manager);
for (iter = objects; iter; iter = iter->next) {
@ -2464,18 +2463,12 @@ got_object_manager (gpointer user_data)
async_inited_obj_nm, init_data);
}
g_list_free_full (objects, g_object_unref);
}
} else
init_async_complete (init_data);
init_async_complete (init_data);
g_signal_connect (priv->object_manager, "notify::name-owner",
G_CALLBACK (name_owner_changed), client);
return G_SOURCE_REMOVE;
out_take_error:
g_simple_async_result_take_error (init_data->result, error);
init_async_complete (init_data);
return G_SOURCE_REMOVE;
}
static void
@ -2493,7 +2486,14 @@ prepare_object_manager (NMClient *client,
user_data, init_async);
g_simple_async_result_set_op_res_gboolean (init_data->result, TRUE);
init_data->idle_init_id = g_idle_add (got_object_manager, init_data);
g_dbus_object_manager_client_new_for_bus (_nm_dbus_bus_type (),
G_DBUS_OBJECT_MANAGER_CLIENT_FLAGS_DO_NOT_AUTO_START,
"org.freedesktop.NetworkManager",
"/org/freedesktop",
proxy_type, NULL, NULL,
init_data->cancellable,
got_object_manager,
init_data);
}
static void
@ -2502,17 +2502,15 @@ name_owner_changed (GObject *object, GParamSpec *pspec, gpointer user_data)
NMClient *self = user_data;
NMClientPrivate *priv = NM_CLIENT_GET_PRIVATE (self);
GDBusObjectManager *object_manager = G_DBUS_OBJECT_MANAGER (object);
gchar *name_owner;
name_owner = g_dbus_object_manager_client_get_name_owner (G_DBUS_OBJECT_MANAGER_CLIENT (object));
if (name_owner) {
g_free (name_owner);
g_object_unref (object_manager);
if (priv->new_object_manager_cancellable)
g_cancellable_cancel (priv->new_object_manager_cancellable);
nm_assert (object_manager == priv->object_manager);
if (_om_has_name_owner (object_manager)) {
g_clear_object (&priv->object_manager);
nm_clear_g_cancellable (&priv->new_object_manager_cancellable);
priv->new_object_manager_cancellable = g_cancellable_new ();
prepare_object_manager (self, priv->new_object_manager_cancellable,
new_object_manager, user_data);
new_object_manager, self);
} else {
g_signal_handlers_disconnect_by_func (object_manager, object_added, self);
unhook_om (self);