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libxl: check available controller and port when hotplugging USB device

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When hotplugging a USB device, check if there is an available controller
and port, if not, automatically create a USB controller of version
2.0 and 8 ports.

Signed-off-by: Chunyan Liu <cyliu@suse.com>
This commit is contained in:
Chunyan Liu 2016-06-15 14:00:11 +08:00 committed by Cédric Bosdonnat
parent 44304c6eb7
commit f5359e55ec
1 changed files with 32 additions and 0 deletions
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32
src/libxl/libxl_driver.c
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@ -3119,6 +3119,8 @@ 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);
@ -3126,6 +3128,36 @@ 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 one"));
virDomainControllerDefFree(controller);
goto cleanup;
}
}
if (VIR_REALLOC_N(vm->def->hostdevs, vm->def->nhostdevs + 1) < 0)
goto cleanup;