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cli: wait for changed signal after updating a connection

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In editor_menu_main(), after saving a connection we wait that the
Update2() D-Bus call returns and then we copy the NMRemoteConnection
instance over to @connection.

This assumes that when Update2() returns the remote connection
instance is already updated with new settings. Indeed, on server side
the NMSettingsConnection first emits the "Updated" signal and then
returns to Update2(). However, the Updated signal doesn't include the
new setting values and so libnm has to fire an asynchronous
nmdbus_settings_connection_call_get_setting() to fetch the new
settings, which terminates after the Update2().

So, to be sure that the remote connection got updated we have also to
listen to the connection-changed signal, which is always emitted after
an update.

https://bugzilla.redhat.com/show_bug.cgi?id=1546805
(cherry picked from commit a370faeb59)
This commit is contained in:
Beniamino Galvani 2018-11-02 11:32:27 +01:00
parent d09e33f38c
commit 3af068a5de
1 changed files with 43 additions and 2 deletions
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45
clients/cli/connections.c
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@ -6534,6 +6534,12 @@ static gboolean nmc_editor_cb_called;
static GError *nmc_editor_error;
static MonitorACInfo *nmc_editor_monitor_ac;
static void
editor_connection_changed_cb (NMConnection *connection, gboolean *changed)
{
*changed = TRUE;
}
/*
* Store 'error' to shared 'nmc_editor_error' and monitoring info to
* 'nmc_editor_monitor_ac' and signal the condition so that
@ -7127,6 +7133,16 @@ menu_switch_to_level1 (const NmcConfig *nmc_config,
menu_ctx->valid_props_str = g_strjoinv (", ", menu_ctx->valid_props);
}
static gboolean
editor_save_timeout (gpointer user_data)
{
gboolean *timeout = user_data;
*timeout = TRUE;
return G_SOURCE_REMOVE;
}
static gboolean
editor_menu_main (NmCli *nmc, NMConnection *connection, const char *connection_type)
{
@ -7646,6 +7662,10 @@ editor_menu_main (NmCli *nmc, NMConnection *connection, const char *connection_t
/* Save the connection */
if (nm_connection_verify (connection, &err1)) {
gboolean persistent = TRUE;
gboolean connection_changed;
nm_auto_unref_gsource GSource *source = NULL;
gboolean timeout = FALSE;
gulong handler_id = 0;
/* parse argument */
if (cmd_arg) {
@ -7674,23 +7694,44 @@ editor_menu_main (NmCli *nmc, NMConnection *connection, const char *connection_t
connection,
add_connection_editor_cb,
info);
connection_changed = TRUE;
} else {
/* Save/update already saved (existing) connection */
nm_connection_replace_settings_from_connection (NM_CONNECTION (rem_con),
connection);
update_connection (persistent, rem_con, update_connection_editor_cb, NULL);
handler_id = g_signal_connect (rem_con,
NM_CONNECTION_CHANGED,
G_CALLBACK (editor_connection_changed_cb),
&connection_changed);
connection_changed = FALSE;
}
//FIXME: add also a timeout for cases the callback is not called
while (!nmc_editor_cb_called)
source = g_timeout_source_new (10 * NM_UTILS_MSEC_PER_SECOND);
g_source_set_callback (source, editor_save_timeout, &timeout, NULL);
g_source_attach (source, g_main_loop_get_context (loop));
while (!nmc_editor_cb_called && !timeout)
g_main_context_iteration (NULL, TRUE);
while (!connection_changed && !timeout)
g_main_context_iteration (NULL, TRUE);
if (handler_id)
g_signal_handler_disconnect (rem_con, handler_id);
g_source_destroy (source);
if (nmc_editor_error) {
g_print (_("Error: Failed to save '%s' (%s) connection: %s\n"),
nm_connection_get_id (connection),
nm_connection_get_uuid (connection),
nmc_editor_error->message);
g_error_free (nmc_editor_error);
} else if (timeout) {
g_print (_("Error: Timeout saving '%s' (%s) connection\n"),
nm_connection_get_id (connection),
nm_connection_get_uuid (connection));
} else {
g_print (!rem_con ?
_("Connection '%s' (%s) successfully saved.\n") :