qcacld-3.0: Limit concurrency of STA(WAPI)

When STA role is coexisting with other sessions(P2P, SAP or IBSS),
WAPI encryption mode is not allowed.
Add a new API to check if the connection/start request should
be rejected when:
1) A STA with WAPI encryption is to be connected while there
   is at least one concurrent session already running.
2) A new session is to be started while there is already a STA
   connection with WAPI encryption enabled.

Change-Id: Id3cc90a63a1b502a3a0783ebbc1af33f96620559
CRs-Fixed: 2271280

core/hdd/src/wlan_hdd_cfg80211.c

@@ -19606,7 +19606,20 @@ static int __wlan_hdd_cfg80211_connect(struct wiphy *wiphy,
 		return -EALREADY;
 	}
 
-	/* Check for max concurrent connections after doing disconnect if any */
+	/*initialise security parameters */
+	status = wlan_hdd_cfg80211_set_privacy(adapter, req);
+
+	if (status < 0) {
+		hdd_err("Failed to set security params");
+		return status;
+	}
+
+	/*
+	 * Check for max concurrent connections after doing disconnect if any,
+	 * must be called after the invocation of wlan_hdd_cfg80211_set_privacy
+	 * so privacy is already set for the current adapter before it's
+	 * checked against concurrency.
+	 */
 	if (req->channel) {
 		bool ok = false;
 
@@ -19659,14 +19672,6 @@ static int __wlan_hdd_cfg80211_connect(struct wiphy *wiphy,
 		}
 	}
 
-	/*initialise security parameters */
-	status = wlan_hdd_cfg80211_set_privacy(adapter, req);
-
-	if (0 > status) {
-		hdd_err("Failed to set security params");
-		return status;
-	}
-
 	if (req->channel)
 		channel = req->channel->hw_value;
 	else

core/hdd/src/wlan_hdd_main.c

@@ -2658,6 +2658,34 @@ static void hdd_update_ipa_component_config(struct hdd_context *hdd_ctx)
 }
 #endif
 
+#ifdef FEATURE_WLAN_WAPI
+/**
+ * hdd_wapi_security_sta_exist() - return wapi security sta exist or not
+ *
+ * This API returns the wapi security station exist or not
+ *
+ * Return: true - wapi security station exist
+ */
+static bool hdd_wapi_security_sta_exist(void)
+{
+	struct hdd_adapter *adapter = NULL;
+	struct hdd_context *hdd_ctx = cds_get_context(QDF_MODULE_ID_HDD);
+
+	hdd_for_each_adapter(hdd_ctx, adapter) {
+		if ((adapter->device_mode == QDF_STA_MODE) &&
+		    adapter->wapi_info.wapi_mode &&
+		    (adapter->wapi_info.wapi_auth_mode != WAPI_AUTH_MODE_OPEN))
+			return true;
+	}
+	return false;
+}
+#else
+static bool hdd_wapi_security_sta_exist(void)
+{
+	return false;
+}
+#endif
+
 #ifdef FEATURE_WLAN_MCC_TO_SCC_SWITCH
 static enum policy_mgr_con_mode wlan_hdd_get_mode_for_non_connected_vdev(
 			struct wlan_objmgr_psoc *psoc, uint8_t vdev_id)
@@ -2680,6 +2708,7 @@ static void hdd_register_policy_manager_callback(
 {
 	struct policy_mgr_hdd_cbacks hdd_cbacks;
 
+	qdf_mem_zero(&hdd_cbacks, sizeof(hdd_cbacks));
 	hdd_cbacks.sap_restart_chan_switch_cb =
 		hdd_sap_restart_chan_switch_cb;
 	hdd_cbacks.wlan_hdd_get_channel_for_sap_restart =
@@ -2687,7 +2716,8 @@ static void hdd_register_policy_manager_callback(
 	hdd_cbacks.get_mode_for_non_connected_vdev =
 		wlan_hdd_get_mode_for_non_connected_vdev;
 	hdd_cbacks.hdd_get_device_mode = hdd_get_device_mode;
-
+	hdd_cbacks.hdd_wapi_security_sta_exist =
+		hdd_wapi_security_sta_exist;
 	if (QDF_STATUS_SUCCESS !=
 	    policy_mgr_register_hdd_cb(psoc, &hdd_cbacks)) {
 		hdd_err("HDD callback registration with policy manager failed");