[Spice-devel] [PATCH v6 07/14] UsbDeviceManager: Track device redirection operations in progress

[Dmitry Fleytman]

From: Kirill Moizik <kmoizik at redhat.com>

During device connection, unwanted hotplug events may happen.
We need to ignore those therefore we track redirection operations
in progress.

See also comment to commit
"Do not process USB hotplug events while redirection is in progress"
that introduces corresponding filtering out logic.

Signed-off-by: Kirill Moizik <kmoizik at redhat.com>
Signed-off-by: Dmitry Fleytman <dfleytma at redhat.com>
---
 src/usb-device-manager.c | 69 +++++++++++++++++++++++++++++++++++++++---------
 1 file changed, 56 insertions(+), 13 deletions(-)

diff --git a/src/usb-device-manager.c b/src/usb-device-manager.c
index 4d376b6..fc0f15f 100644
--- a/src/usb-device-manager.c
+++ b/src/usb-device-manager.c
@@ -122,6 +122,7 @@ struct _SpiceUsbDeviceManagerPrivate {
     GUdevClient *udev;
     libusb_device **coldplug_list; /* Avoid needless reprobing during init */
 #else
+    gboolean redirecting; /* Handled by GUdevClient in the gudev case */
     libusb_hotplug_callback_handle hp_handle;
 #endif
 #ifdef G_OS_WIN32
@@ -208,10 +209,25 @@ _spice_usb_device_manager_connect_device_async(SpiceUsbDeviceManager *self,
                                                GAsyncReadyCallback callback,
                                                gpointer user_data);
 
+static
+void _connect_device_async_cb(GObject *gobject,
+                              GAsyncResult *channel_res,
+                              gpointer user_data);
+
 G_DEFINE_BOXED_TYPE(SpiceUsbDevice, spice_usb_device,
                     (GBoxedCopyFunc)spice_usb_device_ref,
                     (GBoxedFreeFunc)spice_usb_device_unref)
 
+static void
+_set_redirecting(SpiceUsbDeviceManager *self, gboolean is_redirecting)
+{
+#ifdef USE_GUDEV
+    g_object_set(self->priv->udev, "redirecting", is_redirecting, NULL);
+#else
+    self->priv->redirecting = is_redirecting;
+#endif
+}
+
 #else
 G_DEFINE_BOXED_TYPE(SpiceUsbDevice, spice_usb_device, g_object_ref, g_object_unref)
 #endif
@@ -1135,7 +1151,7 @@ static void spice_usb_device_manager_drv_install_cb(GObject *gobject,
     SpiceUsbDevice *device;
     UsbInstallCbInfo *cbinfo;
     GCancellable *cancellable;
-    GAsyncReadyCallback callback;
+    gpointer data;
 
     g_return_if_fail(user_data != NULL);
 
@@ -1144,8 +1160,7 @@ static void spice_usb_device_manager_drv_install_cb(GObject *gobject,
     device      = cbinfo->device;
     installer   = cbinfo->installer;
     cancellable = cbinfo->cancellable;
-    callback    = cbinfo->callback;
-    user_data   = cbinfo->user_data;
+    data        = cbinfo->user_data;
 
     g_free(cbinfo);
 
@@ -1167,8 +1182,8 @@ static void spice_usb_device_manager_drv_install_cb(GObject *gobject,
     _spice_usb_device_manager_connect_device_async(self,
                                                    device,
                                                    cancellable,
-                                                   callback,
-                                                   user_data);
+                                                   _connect_device_async_cb,
+                                                   data);
 
     spice_usb_device_unref(device);
 }
@@ -1496,6 +1511,8 @@ _spice_usb_device_manager_uninstall_driver_async(SpiceUsbDeviceManager *self,
 
 #endif
 
+#ifdef USE_USBREDIR
+
 static void
 _spice_usb_device_manager_connect_device_async(SpiceUsbDeviceManager *self,
                                                SpiceUsbDevice *device,
@@ -1513,7 +1530,6 @@ _spice_usb_device_manager_connect_device_async(SpiceUsbDeviceManager *self,
     result = g_simple_async_result_new(G_OBJECT(self), callback, user_data,
                                spice_usb_device_manager_connect_device_async);
 
-#ifdef USE_USBREDIR
     SpiceUsbDeviceManagerPrivate *priv = self->priv;
     libusb_device *libdev;
     guint i;
@@ -1559,18 +1575,17 @@ _spice_usb_device_manager_connect_device_async(SpiceUsbDeviceManager *self,
         libusb_unref_device(libdev);
         return;
     }
-#endif
 
     g_simple_async_result_set_error(result,
                             SPICE_CLIENT_ERROR, SPICE_CLIENT_ERROR_FAILED,
                             _("No free USB channel"));
-#ifdef USE_USBREDIR
 done:
-#endif
     g_simple_async_result_complete_in_idle(result);
     g_object_unref(result);
 }
 
+#endif
+
 /**
  * spice_usb_device_manager_connect_device_async:
  * @self: a #SpiceUsbDeviceManager.
@@ -1589,11 +1604,20 @@ void spice_usb_device_manager_connect_device_async(SpiceUsbDeviceManager *self,
                                              GAsyncReadyCallback callback,
                                              gpointer user_data)
 {
+    g_return_if_fail(SPICE_IS_USB_DEVICE_MANAGER(self));
 
-#if defined(USE_USBREDIR) && defined(G_OS_WIN32)
+#ifdef USE_USBREDIR
+
+    GSimpleAsyncResult *result =
+        g_simple_async_result_new(G_OBJECT(self), callback, user_data,
+                                  spice_usb_device_manager_connect_device_async);
+
+    _set_redirecting(self, TRUE);
+
+#ifdef G_OS_WIN32
     if (self->priv->use_usbclerk) {
         _spice_usb_device_manager_install_driver_async(self, device, cancellable,
-                                                       callback, user_data);
+                                                       callback, result);
         return;
     }
 #endif
@@ -1601,10 +1625,13 @@ void spice_usb_device_manager_connect_device_async(SpiceUsbDeviceManager *self,
     _spice_usb_device_manager_connect_device_async(self,
                                                    device,
                                                    cancellable,
-                                                   callback,
-                                                   user_data);
+                                                   _connect_device_async_cb,
+                                                   result);
+
+#endif
 }
 
+
 /**
  * spice_usb_device_manager_connect_device_finish:
  * @self: a #SpiceUsbDeviceManager.
@@ -1630,6 +1657,22 @@ gboolean spice_usb_device_manager_connect_device_finish(
     return TRUE;
 }
 
+#ifdef USE_USBREDIR
+static
+void _connect_device_async_cb(GObject *gobject,
+                              GAsyncResult *channel_res,
+                              gpointer user_data)
+{
+    SpiceUsbDeviceManager *self = SPICE_USB_DEVICE_MANAGER(gobject);
+    GSimpleAsyncResult *result = user_data;
+
+    _set_redirecting(self, FALSE);
+
+    g_simple_async_result_complete(result);
+    g_object_unref(result);
+}
+#endif
+
 /**
  * spice_usb_device_manager_disconnect_device:
  * @manager: the #SpiceUsbDeviceManager manager
-- 
2.5.0