pmaports/temp/modemmanager/0026-base-bearer-synchronize-state-when-resuming.patch

From a293dcb53274119799d079152b894ce4f660776c Mon Sep 17 00:00:00 2001
From: Dylan Van Assche <me@dylanvanassche.be>
Date: Sat, 20 Mar 2021 16:23:14 +0100
Subject: [PATCH 26/39] base-bearer: synchronize state when resuming

Refresh connection status on resume to confirm
that the connection bearers are still valid.
---
 src/mm-base-bearer.c | 124 +++++++++++++++++++++++++++++++++++++++++++
 src/mm-base-bearer.h |  24 +++++++++
 src/mm-iface-modem.c |  25 +++++++++
 3 files changed, 173 insertions(+)

diff --git a/src/mm-base-bearer.c b/src/mm-base-bearer.c
index 7510fe19..1ce6e49c 100644
--- a/src/mm-base-bearer.c
+++ b/src/mm-base-bearer.c
@@ -1399,6 +1399,130 @@ mm_base_bearer_report_connection_status (MMBaseBearer             *self,
 
 /*****************************************************************************/
 
+#if defined WITH_SYSTEMD_SUSPEND_RESUME
+
+typedef struct _SyncingContext SyncingContext;
+static void interface_syncing_step (GTask *task);
+
+typedef enum {
+    SYNCING_STEP_FIRST,
+    SYNCING_STEP_REFRESH_CONNECTION,
+    SYNCING_STEP_LAST
+} SyncingStep;
+
+struct _SyncingContext {
+    SyncingStep step;
+};
+
+gboolean
+mm_base_bearer_sync_finish (MMBaseBearer  *self,
+                            GAsyncResult  *res,
+                            GError       **error)
+{
+    return g_task_propagate_boolean (G_TASK (res), error);
+}
+
+static gboolean
+reload_connection_status_finish (MMBaseBearer  *self,
+                                 GAsyncResult  *res,
+                                 GError       **error)
+{
+    return g_task_propagate_boolean (G_TASK (res), error);
+}
+
+static void
+reload_connection_status_ready (MMBaseBearer *self,
+                                GAsyncResult *res,
+                                GTask        *task)
+{
+    SyncingContext    *ctx;
+    g_autoptr(GError)  error = NULL;
+
+    ctx = g_task_get_task_data (task);
+
+    reload_connection_status_finish (self, res, &error);
+    if (error)
+        mm_obj_warn (self, "reloading connection status failed: %s", error->message);
+
+    /* Go on to the next step */
+    ctx->step++;
+    interface_syncing_step (task);
+}
+
+static void
+interface_syncing_step (GTask *task)
+{
+    MMBaseBearer   *self;
+    SyncingContext *ctx;
+
+    /* Don't run new steps if we're cancelled */
+    if (g_task_return_error_if_cancelled (task)) {
+        g_object_unref (task);
+        return;
+    }
+
+    self = g_task_get_source_object (task);
+    ctx = g_task_get_task_data (task);
+
+    switch (ctx->step) {
+    case SYNCING_STEP_FIRST:
+        ctx->step++;
+        /* fall through */
+
+    case SYNCING_STEP_REFRESH_CONNECTION:
+        /*
+         * AT+PPP based connections should not be synced.
+         * When a AT+PPP connection bearer is connected, the 'ignore_disconnection_reports' flag is set.
+         */
+        if (!self->priv->ignore_disconnection_reports) {
+            if (!MM_BASE_BEARER_GET_CLASS (self)->reload_connection_status)
+                mm_obj_warn (self, "unable to reload connection status, method not implemented");
+            else {
+                mm_obj_dbg (self, "refreshing connection status");
+                MM_BASE_BEARER_GET_CLASS (self)->reload_connection_status (self,
+                                                                           (GAsyncReadyCallback) reload_connection_status_ready,
+                                                                           task);
+                return;
+            }
+        }
+        ctx->step++;
+        /* fall through */
+
+    case SYNCING_STEP_LAST:
+        /* We are done without errors! */
+        g_task_return_boolean (task, TRUE);
+        g_object_unref (task);
+        return;
+
+    default:
+        break;
+    }
+
+    g_assert_not_reached ();
+}
+
+void
+mm_base_bearer_sync (MMBaseBearer        *self,
+                     GAsyncReadyCallback  callback,
+                     gpointer             user_data)
+{
+    SyncingContext *ctx;
+    GTask          *task;
+
+    /* Create SyncingContext */
+    ctx = g_new0 (SyncingContext, 1);
+    ctx->step = SYNCING_STEP_FIRST;
+
+    /* Create sync steps task and execute it */
+    task = g_task_new (self, NULL, callback, user_data);
+    g_task_set_task_data (task, ctx, (GDestroyNotify)g_free);
+    interface_syncing_step (task);
+}
+
+#endif
+
+/*****************************************************************************/
+
 static gchar *
 log_object_build_id (MMLogObject *_self)
 {
diff --git a/src/mm-base-bearer.h b/src/mm-base-bearer.h
index 1c1f96ea..a2a00166 100644
--- a/src/mm-base-bearer.h
+++ b/src/mm-base-bearer.h
@@ -123,6 +123,18 @@ struct _MMBaseBearerClass {
                                                                 GAsyncResult *res,
                                                                 GError **error);
 
+#if defined WITH_SYSTEMD_SUSPEND_RESUME
+
+    /* Reload connection status */
+    void (* reload_connection_status) (MMBaseBearer *bearer,
+                                       GAsyncReadyCallback callback,
+                                       gpointer user_data);
+    gboolean (* reload_connection_status_finish) (MMBaseBearer *bearer,
+                                                  GAsyncResult *res,
+                                                  GError **error);
+
+#endif
+
     /* Reload statistics */
     void (* reload_stats) (MMBaseBearer *bearer,
                            GAsyncReadyCallback callback,
@@ -169,4 +181,16 @@ void mm_base_bearer_disconnect_force (MMBaseBearer *self);
 void mm_base_bearer_report_connection_status (MMBaseBearer *self,
                                               MMBearerConnectionStatus status);
 
+#if defined WITH_SYSTEMD_SUSPEND_RESUME
+
+/* Sync Broadband Bearer (async) */
+void     mm_base_bearer_sync        (MMBaseBearer *self,
+                                     GAsyncReadyCallback callback,
+                                     gpointer user_data);
+gboolean mm_base_bearer_sync_finish (MMBaseBearer *self,
+                                     GAsyncResult *res,
+                                     GError **error);
+
+#endif
+
 #endif /* MM_BASE_BEARER_H */
diff --git a/src/mm-iface-modem.c b/src/mm-iface-modem.c
index b298eb89..1fe1feff 100644
--- a/src/mm-iface-modem.c
+++ b/src/mm-iface-modem.c
@@ -4220,6 +4220,7 @@ typedef enum {
     SYNCING_STEP_DETECT_SIM_SWAP,
     SYNCING_STEP_REFRESH_SIM_LOCK,
     SYNCING_STEP_REFRESH_SIGNAL_STRENGTH,
+    SYNCING_STEP_REFRESH_BEARERS,
     SYNCING_STEP_LAST
 } SyncingStep;
 
@@ -4271,6 +4272,22 @@ sync_detect_sim_swap_ready (MMIfaceModem *self,
     interface_syncing_step (task);
 }
 
+static void
+reload_bearers (MMIfaceModem *self)
+{
+    g_autoptr(MMBearerList) list = NULL;
+
+    g_object_get (self,
+                  MM_IFACE_MODEM_BEARER_LIST, &list,
+                  NULL);
+
+    if (list) {
+        mm_bearer_list_foreach (list,
+                               (MMBearerListForeachFunc)mm_base_bearer_sync,
+                                NULL);
+    }
+}
+
 static void
 interface_syncing_step (GTask *task)
 {
@@ -4317,6 +4334,14 @@ interface_syncing_step (GTask *task)
         ctx->step++;
         /* fall through */
 
+    case SYNCING_STEP_REFRESH_BEARERS:
+        /*
+         * Refresh bearers.
+         */
+        reload_bearers (self);
+        ctx->step++;
+        /* fall through */
+
     case SYNCING_STEP_LAST:
         /* We are done without errors! */
         g_task_return_boolean (task, TRUE);
-- 
2.31.1