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-rw-r--r--plugins/udisks/udisks-plugin.c313
1 files changed, 313 insertions, 0 deletions
diff --git a/plugins/udisks/udisks-plugin.c b/plugins/udisks/udisks-plugin.c
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+++ b/plugins/udisks/udisks-plugin.c
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+/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*-
+ *
+ * Copyright (C) 2009 Pramod Dematagoda <[email protected]>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif /* HAVE_CONFIG_H */
+
+#include <stdio.h>
+#include <atasmart.h>
+#include <glib.h>
+#include <dbus/dbus-glib.h>
+#include "udisks-plugin.h"
+
+#define UDISKS_BUS_NAME "org.freedesktop.UDisks"
+#define UDISKS_DEVICE_INTERFACE_NAME "org.freedesktop.UDisks.Device"
+#define UDISKS_INTERFACE_NAME "org.freedesktop.UDisks"
+#define UDISKS_PROPERTIES_INTERFACE "org.freedesktop.DBus.Properties"
+#define UDISKS_OBJECT_PATH "/org/freedesktop/UDisks"
+
+
+/*
+ * Info about a single sensor
+ */
+typedef struct _DevInfo{
+ gchar *path;
+ gboolean changed;
+ gdouble temp;
+ DBusGProxy *sensor_proxy;
+} DevInfo;
+
+const gchar *plugin_name = "udisks";
+
+GHashTable *devices = NULL;
+
+/* This is a global variable for convenience */
+DBusGConnection *connection;
+
+
+/* This is the handler for the Changed() signal emitted by UDisks. */
+static void udisks_changed_signal_cb(DBusGProxy *sensor_proxy) {
+ const gchar *path = dbus_g_proxy_get_path(sensor_proxy);
+ DevInfo *info;
+
+ info = g_hash_table_lookup(devices, path);
+ if (info)
+ {
+ info->changed = TRUE;
+ }
+}
+
+static void udisks_plugin_get_sensors(GList **sensors) {
+ DBusGProxy *proxy, *sensor_proxy;
+ GError *error = NULL;
+ GPtrArray *paths;
+ guint i;
+ DevInfo *info;
+
+ g_type_init();
+
+ /* This connection will be used for everything, including the obtaining
+ * of sensor data
+ */
+ connection = dbus_g_bus_get(DBUS_BUS_SYSTEM, &error);
+ if (connection == NULL)
+ {
+ g_debug("Failed to open connection to DBUS: %s",
+ error->message);
+ g_error_free(error);
+ return;
+ }
+
+ /* This is the proxy which is only used once during the enumeration of
+ * the device object paths
+ */
+ proxy = dbus_g_proxy_new_for_name(connection,
+ UDISKS_BUS_NAME,
+ UDISKS_OBJECT_PATH,
+ UDISKS_INTERFACE_NAME);
+
+ /* The object paths of the disks are enumerated and placed in an array
+ * of object paths
+ */
+ if (!dbus_g_proxy_call(proxy, "EnumerateDevices", &error,
+ G_TYPE_INVALID,
+ dbus_g_type_get_collection("GPtrArray",
+ DBUS_TYPE_G_OBJECT_PATH),
+ &paths,
+ G_TYPE_INVALID))
+ {
+ g_debug("Failed to enumerate disk devices: %s",
+ error->message);
+ g_error_free(error);
+ g_object_unref(proxy);
+ dbus_g_connection_unref (connection);
+ return;
+ }
+
+ for (i = 0; i < paths->len; i++) {
+ /* This proxy is used to get the required data in order to build
+ * up the list of sensors
+ */
+ GValue model = {0, }, id = {0, }, smart_available = {0, };
+ gchar *path = (gchar *)g_ptr_array_index(paths, i);
+
+ sensor_proxy = dbus_g_proxy_new_for_name(connection,
+ UDISKS_BUS_NAME,
+ path,
+ UDISKS_PROPERTIES_INTERFACE);
+
+ if (dbus_g_proxy_call(sensor_proxy, "Get", &error,
+ G_TYPE_STRING,
+ UDISKS_BUS_NAME,
+ G_TYPE_STRING,
+ "DriveAtaSmartIsAvailable",
+ G_TYPE_INVALID,
+ G_TYPE_VALUE, &smart_available, G_TYPE_INVALID)) {
+ gchar *id_str, *model_str;
+ if (!g_value_get_boolean(&smart_available)) {
+ g_debug("Drive at path '%s' does not support Smart monitoring... ignoring",
+ path);
+ g_object_unref(sensor_proxy);
+ g_free (path);
+ continue;
+ }
+
+ dbus_g_proxy_call(sensor_proxy, "Get", NULL,
+ G_TYPE_STRING, UDISKS_BUS_NAME,
+ G_TYPE_STRING, "DriveModel",
+ G_TYPE_INVALID,
+ G_TYPE_VALUE, &model,
+ G_TYPE_INVALID);
+
+ dbus_g_proxy_call(sensor_proxy, "Get", NULL,
+ G_TYPE_STRING, UDISKS_BUS_NAME,
+ G_TYPE_STRING, "DeviceFile",
+ G_TYPE_INVALID,
+ G_TYPE_VALUE, &id,
+ G_TYPE_INVALID);
+
+ g_object_unref(sensor_proxy);
+
+ sensor_proxy = dbus_g_proxy_new_for_name(connection,
+ UDISKS_BUS_NAME,
+ path,
+ UDISKS_DEVICE_INTERFACE_NAME);
+
+ /* Use the Changed() signal emitted from UDisks to
+ * get the temperature without always polling
+ */
+ dbus_g_proxy_add_signal(sensor_proxy, "Changed",
+ G_TYPE_INVALID);
+
+ dbus_g_proxy_connect_signal(sensor_proxy, "Changed",
+ G_CALLBACK(udisks_changed_signal_cb),
+ path, NULL);
+
+ info = g_malloc(sizeof(DevInfo));
+ if (devices == NULL)
+ {
+ devices = g_hash_table_new(g_str_hash,
+ g_str_equal);
+ }
+ info->path = g_strdup(path);
+ info->sensor_proxy = sensor_proxy;
+ /* Set the device status changed as TRUE because we need
+ * to get the initial temperature reading
+ */
+ info->changed = TRUE;
+ g_hash_table_insert(devices, info->path, info);
+
+ /* Write the sensor data */
+ id_str = g_value_get_string(&id);
+ model_str = g_value_get_string(&model);
+ sensors_applet_plugin_add_sensor(sensors,
+ path,
+ id_str,
+ model_str,
+ TEMP_SENSOR,
+ FALSE,
+ HDD_ICON,
+ DEFAULT_GRAPH_COLOR);
+ g_free(id_str);
+ g_free(model_str);
+ } else {
+ g_debug ("Cannot obtain data for device: %s\n"
+ "Error: %s\n",
+ path,
+ error->message);
+ g_error_free (error);
+ error = NULL;
+ g_object_unref(sensor_proxy);
+ }
+ g_free(path);
+ }
+ g_ptr_array_free(paths, TRUE);
+ g_object_unref(proxy);
+ if (devices == NULL)
+ dbus_g_connection_unref (connection);
+}
+
+static gdouble udisks_plugin_get_sensor_value(const gchar *path,
+ const gchar *id,
+ SensorType type,
+ GError **error) {
+ GValue smart_blob_val = { 0, };
+ GArray *smart_blob;
+ gdouble temperature;
+ guint64 temperature_placer;
+ DBusGProxy *sensor_proxy;
+ guint count;
+ DevInfo *info;
+ SkDisk *sk_disk;
+
+ info = (DevInfo *)g_hash_table_lookup(devices, path);
+ if (info == NULL)
+ {
+ g_set_error(error, SENSORS_APPLET_PLUGIN_ERROR, 0,
+ "Error finding disk with path %s", path);
+ return 0.0;
+ }
+
+ /* If the device has changed, we find the new temperature and return
+ * it
+ */
+ if (info->changed)
+ {
+ GValue smart_time = { 0, };
+ sensor_proxy = dbus_g_proxy_new_for_name(connection,
+ UDISKS_BUS_NAME,
+ path,
+ UDISKS_PROPERTIES_INTERFACE);
+ if (!dbus_g_proxy_call(sensor_proxy, "Get", error,
+ G_TYPE_STRING, UDISKS_BUS_NAME,
+ G_TYPE_STRING, "DriveAtaSmartTimeCollected", G_TYPE_INVALID,
+ G_TYPE_VALUE, &smart_time,
+ G_TYPE_INVALID) ||
+ !g_value_get_uint64(&smart_time))
+ {
+ g_debug("Smart data has not been collected yet... returning 0.0 temp for now to avoid waking drive up unnecessarily");
+ g_object_unref(sensor_proxy);
+ return 0.0;
+ }
+
+ if (dbus_g_proxy_call(sensor_proxy, "Get", error,
+ G_TYPE_STRING, UDISKS_BUS_NAME,
+ G_TYPE_STRING, "DriveAtaSmartBlob", G_TYPE_INVALID,
+ G_TYPE_VALUE, &smart_blob_val,
+ G_TYPE_INVALID))
+ {
+ smart_blob = g_value_get_boxed(&smart_blob_val);
+
+ sk_disk_open(NULL, &sk_disk);
+ sk_disk_set_blob (sk_disk, smart_blob->data, smart_blob->len);
+ /* Note: A gdouble cannot be passed in through a cast as it is likely that the
+ * temperature is placed in it purely through memory functions, hence a guint64
+ * is passed and the number is then placed in a gdouble manually
+ */
+ sk_disk_smart_get_temperature (sk_disk, &temperature_placer);
+ temperature = temperature_placer;
+
+ /* Temperature is in mK, so convert it to K first */
+ temperature /= 1000;
+ info->temp = temperature - 273.15;
+ info->changed = FALSE;
+
+ g_free (sk_disk);
+ g_array_free(smart_blob, TRUE);
+ }
+ g_object_unref(sensor_proxy);
+ }
+ return info->temp;
+}
+
+static GList *udisks_plugin_init(void) {
+ GList *sensors = NULL;
+
+ udisks_plugin_get_sensors(&sensors);
+
+ return sensors;
+}
+
+const gchar *sensors_applet_plugin_name(void)
+{
+ return plugin_name;
+}
+
+GList *sensors_applet_plugin_init(void)
+{
+ return udisks_plugin_init();
+}
+
+gdouble sensors_applet_plugin_get_sensor_value(const gchar *path,
+ const gchar *id,
+ SensorType type,
+ GError **error) {
+ return udisks_plugin_get_sensor_value(path, id, type, error);
+}
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