[PATCH 4/4] qrtrqmi: Manage main netdev as part of .set_online

The mhi_hwipX interface is created with IFF_UP not set.  It must be set
IFF_UP when the modem is brought into online state, otherwise packets
will not flow properly.  Similarly, when bring the modem into offline
state, bring down the main network device for consistency.
---
 plugins/qrtrqmi.c | 73 +++++++++++++++++++++++++++++++++++++++++------
 1 file changed, 65 insertions(+), 8 deletions(-)

diff --git a/plugins/qrtrqmi.c b/plugins/qrtrqmi.c
index 8bfbb11d167e..7065419c34f7 100644
--- a/plugins/qrtrqmi.c
+++ b/plugins/qrtrqmi.c
@@ -61,6 +61,7 @@ struct qrtrqmi_data {
 	struct rmnet_ifinfo rmnet_interfaces[MAX_CONTEXTS];
 	uint8_t n_premux;
 	int rmnet_id;
+	uint32_t set_powered_id;
 	bool have_voice : 1;
 };
 
@@ -152,6 +153,12 @@ static void qrtrqmi_remove(struct ofono_modem *modem)
 	}
 
 	qrtrqmi_deinit(data);
+
+	if (data->set_powered_id) {
+		l_netlink_cancel(l_rtnl_get(), data->set_powered_id);
+		data->set_powered_id = 0;
+	}
+
 	l_free(data);
 }
 
@@ -390,25 +397,75 @@ static void set_online_cb(struct qmi_result *result, void *user_data)
 		CALLBACK_WITH_SUCCESS(cb, cbd->data);
 }
 
-static void qrtrqmi_set_online(struct ofono_modem *modem, ofono_bool_t online,
-				ofono_modem_online_cb_t cb, void *user_data)
+static void powered_common_cb(int error, bool online, struct cb_data *cbd)
 {
-	struct qrtrqmi_data *data = ofono_modem_get_data(modem);
-	struct cb_data *cbd = cb_data_new(cb, user_data);
+	struct qrtrqmi_data *data = cbd->user;
 	struct qmi_param *param;
+	ofono_modem_online_cb_t cb = cbd->cb;
 
-	DBG("%p %s", modem, online ? "online" : "offline");
+	data->set_powered_id = 0;
+
+	if (error)
+		goto error;
 
 	param = qmi_param_new_uint8(QMI_DMS_PARAM_OPER_MODE,
 					online ? QMI_DMS_OPER_MODE_ONLINE :
 						QMI_DMS_OPER_MODE_LOW_POWER);
 
-	if (qmi_service_send(data->dms, QMI_DMS_SET_OPER_MODE, param,
-				set_online_cb, cbd, l_free) > 0)
+	if (qmi_service_send(data->dms, QMI_DMS_SET_OPER_MODE,
+					param, set_online_cb,
+					cb_data_ref(cbd), cb_data_unref) > 0)
 		return;
 
 	qmi_param_free(param);
-	l_free(cbd);
+	cb_data_unref(cbd);
+error:
+	CALLBACK_WITH_FAILURE(cb, cbd->data);
+}
+
+static void powered_up_cb(int error, uint16_t type, const void *msg,
+				uint32_t len, void *user_data)
+{
+	struct cb_data *cbd = user_data;
+
+	DBG("error: %d: %s", error, strerror(-error));
+	powered_common_cb(error, true, cbd);
+}
+
+static void powered_down_cb(int error, uint16_t type, const void *msg,
+				uint32_t len, void *user_data)
+{
+	struct cb_data *cbd = user_data;
+
+	DBG("error: %d: %s", error, strerror(-error));
+	powered_common_cb(error, false, cbd);
+}
+
+static void qrtrqmi_set_online(struct ofono_modem *modem, ofono_bool_t online,
+				ofono_modem_online_cb_t cb, void *user_data)
+{
+	struct qrtrqmi_data *data = ofono_modem_get_data(modem);
+	struct l_netlink *rtnl = l_rtnl_get();
+	struct cb_data *cbd = cb_data_new(cb, user_data);
+	l_netlink_command_func_t powered_cb;
+
+	DBG("%p %s", modem, online ? "online" : "offline");
+
+	cbd->user = data;
+
+	if (online)
+		powered_cb = powered_up_cb;
+	else
+		powered_cb = powered_down_cb;
+
+	data->set_powered_id = l_rtnl_set_powered(rtnl, data->main_net_ifindex,
+							online, powered_cb,
+							cbd, cb_data_unref);
+	if (data->set_powered_id)
+		return;
+
+	cb_data_unref(cbd);
+	CALLBACK_WITH_FAILURE(cb, user_data);
 }
 
 static void qrtrqmi_pre_sim(struct ofono_modem *modem)
-- 
2.47.0