[PATCH skeleton] Support for stop watchdog

[OpenBMC Patches]

From: Adriana Kobylak <anoo at us.ibm.com>

Add interface to stop the currently running watchdog if any.
---
 bin/ipmi_example.py         |  4 ++++
 objects/host_watchdog_obj.c | 25 +++++++++++++++++++++++--
 2 files changed, 27 insertions(+), 2 deletions(-)

diff --git a/bin/ipmi_example.py b/bin/ipmi_example.py
index ba13b60..f8b921e 100755
--- a/bin/ipmi_example.py
+++ b/bin/ipmi_example.py
@@ -120,8 +120,12 @@ if __name__ == '__main__':
 	elif (cmd == "statewatchdog"):
 		intf = getWatchdog()
 		intf.start()
+	elif (cmd == "stopwatchdog"):
+		intf = getWatchdog()
+		intf.stop()
 	elif (cmd == "setwatchdog"):
 		count = int(sys.argv[2])
+		intf = getWatchdog()
 		intf.set(count)
 	else:
 		print "Unsupported command"
diff --git a/objects/host_watchdog_obj.c b/objects/host_watchdog_obj.c
index e4e4bab..b1c8f2b 100644
--- a/objects/host_watchdog_obj.c
+++ b/objects/host_watchdog_obj.c
@@ -8,7 +8,7 @@ static const gchar* dbus_object_path = "/org/openbmc/watchdog";
 static const gchar* dbus_name        = "org.openbmc.watchdog.Host";
 
 static GDBusObjectManagerServer *manager = NULL;
-
+static guint watchdogid = 0;
 
 static gboolean
 poll_watchdog(gpointer user_data)
@@ -21,6 +21,7 @@ poll_watchdog(gpointer user_data)
 	if (count == 0)
 	{
 		//watchdog error, emit error and stop watchdog
+		watchdogid = 0;
 		watchdog_emit_watchdog_error(watchdog);
 		return FALSE;
 	}
@@ -49,7 +50,7 @@ on_start        (Watchdog  *wd,
   	watchdog_set_watchdog(wd,1);
 	guint poll_interval = watchdog_get_poll_interval(wd);
     g_print("Starting watchdog with poll interval: %d\n", poll_interval);
-  	g_timeout_add(poll_interval, poll_watchdog, user_data);
+  	watchdogid = g_timeout_add(poll_interval, poll_watchdog, user_data);
 	watchdog_complete_start(wd,invocation);
 	return TRUE;
 }
@@ -64,7 +65,22 @@ on_poke         (Watchdog  *wd,
 	return TRUE;
 }
 
+static gboolean
+on_stop         (Watchdog  *wd,
+                GDBusMethodInvocation  *invocation,
+                gpointer                user_data)
+{
+    g_print("Stopping watchdog\n");
+
+    if (watchdogid)
+    {
+        g_source_remove(watchdogid);
+        watchdogid = 0;
+    }
 
+    watchdog_complete_stop(wd,invocation);
+    return TRUE;
+}
 
 static void 
 on_bus_acquired (GDBusConnection *connection,
@@ -107,6 +123,11 @@ on_bus_acquired (GDBusConnection *connection,
                     object); /* user_data */
 
         g_signal_connect (wd,
+                    "handle-stop",
+                    G_CALLBACK (on_stop),
+                    object); /* user_data */
+
+        g_signal_connect (wd,
                     "handle-set",
                     G_CALLBACK (set_poll_interval),
                     object); /* user_data */
-- 
2.6.0