[gvfs] daemon: New logic to the backend to block requests

[Christian Kellner <gicmo src gnome org>]

commit 66bbe38a1329616e6313b6bd41b98e1b77d1306d
Author: Christian Kellner <gicmo gnome org>
Date:   Wed May 25 15:27:33 2011 +0200

    daemon: New logic to the backend to block requests
    
    When the backend is set to block requests it will answer all
    incoming requets with G_IO_ERROR_NOT_MOUNTED. This will later
    be used by the unmount code to bridge the time while we are
    unregistering the mount but have not finished doing so.

 daemon/gvfsbackend.c |   22 ++++++++++++++++++++++
 daemon/gvfsbackend.h |    2 ++
 2 files changed, 24 insertions(+), 0 deletions(-)
---
diff --git a/daemon/gvfsbackend.c b/daemon/gvfsbackend.c
index ee32108..1c2fb8a 100644
--- a/daemon/gvfsbackend.c
+++ b/daemon/gvfsbackend.c
@@ -80,6 +80,7 @@ struct _GVfsBackendPrivate
   gboolean user_visible;
   char *default_location;
   GMountSpec *mount_spec;
+  gboolean block_requests;
 };
 
 
@@ -509,6 +510,12 @@ g_vfs_backend_add_auto_info (GVfsBackend *backend,
   
 }
 
+void
+g_vfs_backend_set_block_requests (GVfsBackend *backend)
+{
+  backend->priv->block_requests = TRUE;
+}
+
 static DBusHandlerResult
 backend_dbus_handler (DBusConnection  *connection,
 		      DBusMessage     *message,
@@ -522,6 +529,21 @@ backend_dbus_handler (DBusConnection  *connection,
   g_debug ("backend_dbus_handler %s:%s\n",
 	   dbus_message_get_interface (message),
 	   dbus_message_get_member (message));
+
+  if (backend->priv->block_requests)
+    {
+      DBusMessage *reply;
+
+      reply = _dbus_message_new_gerror (message,
+					G_IO_ERROR,
+					G_IO_ERROR_NOT_MOUNTED,
+					"%s", "Backend currently unmounting");
+
+      g_assert (reply != NULL);
+
+      dbus_connection_send (connection, reply, NULL);
+      return DBUS_HANDLER_RESULT_HANDLED;
+    }
   
   if (dbus_message_is_method_call (message,
 				   G_VFS_DBUS_MOUNT_INTERFACE,
diff --git a/daemon/gvfsbackend.h b/daemon/gvfsbackend.h
index 4734f36..6c152ac 100644
--- a/daemon/gvfsbackend.h
+++ b/daemon/gvfsbackend.h
@@ -498,6 +498,8 @@ void        g_vfs_backend_add_auto_info                  (GVfsBackend
 							  GFileInfo             *info,
 							  const char            *uri);
 
+void        g_vfs_backend_set_block_requests             (GVfsBackend           *backend);
+
 gboolean    g_vfs_backend_has_blocking_processes         (GVfsBackend           *backend);
 
 gboolean    g_vfs_backend_unmount_with_operation_finish (GVfsBackend  *backend,