[libvirt] [PATCH 4/6] libxl: check available controller and port when hotplugging USB device
When hotplug a USB device, check if there is available controller
and port, if not, automatically create a USB controller of version
2.0 and 8 ports.
Signed-off-by: Chunyan Liu <cyliu(a)suse.com>
---
src/libxl/libxl_driver.c | 32 ++++++++++++++++++++++++++++++++
1 file changed, 32 insertions(+)
diff --git a/src/libxl/libxl_driver.c b/src/libxl/libxl_driver.c
index d1dd160..d95aa8d 100644
--- a/src/libxl/libxl_driver.c
+++ b/src/libxl/libxl_driver.c
@@ -3091,6 +3091,8 @@ libxlDomainAttachHostUSBDevice(libxlDriverPrivatePtr driver,
libxl_device_usbdev usbdev;
virHostdevManagerPtr hostdev_mgr = driver->hostdevMgr;
int ret = -1;
+ size_t i;
+ int ports = 0, usbdevs = 0;
libxl_device_usbdev_init(&usbdev);
@@ -3098,6 +3100,36 @@ libxlDomainAttachHostUSBDevice(libxlDriverPrivatePtr driver,
hostdev->source.subsys.type != VIR_DOMAIN_HOSTDEV_SUBSYS_TYPE_USB)
goto cleanup;
+ /* search for available controller:port */
+ for (i = 0; i < vm->def->ncontrollers; i++)
+ ports += vm->def->controllers[i]->opts.usbopts.ports;
+
+ for (i = 0; i < vm->def->nhostdevs; i++) {
+ if (hostdev->mode == VIR_DOMAIN_HOSTDEV_MODE_SUBSYS &&
+ hostdev->source.subsys.type == VIR_DOMAIN_HOSTDEV_SUBSYS_TYPE_USB)
+ usbdevs++;
+ }
+
+ if (ports <= usbdevs) {
+ /* no free ports, we will create a new usb controller */
+ virDomainControllerDefPtr controller;
+
+ if (!(controller = virDomainControllerDefNew(VIR_DOMAIN_CONTROLLER_TYPE_USB)))
+ goto cleanup;
+
+ controller->model = VIR_DOMAIN_CONTROLLER_MODEL_USB_QUSB2;
+ controller->idx = -1;
+ controller->opts.usbopts.ports = 8;
+
+ if (libxlDomainAttachControllerDevice(driver, vm, controller) < 0) {
+ virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
+ _("No available USB controller and port, and "
+ "failed to attach a new USB controller"));
+ virDomainControllerDefFree(controller);
+ goto cleanup;
+ }
+ }
+
if (VIR_REALLOC_N(vm->def->hostdevs, vm->def->nhostdevs + 1) < 0)
goto cleanup;
--
2.1.4