On 08/05/2016 01:10 AM, Cédric Bosdonnat wrote:
> libxl only has API to address the host USB devices by bus/device.
> Find the bus/device if the user only provided the vendor/product
> of the USB device.
> ---
> src/libxl/libxl_conf.c | 25 +++++++++++++++++--------
> 1 file changed, 17 insertions(+), 8 deletions(-)
>
> diff --git a/src/libxl/libxl_conf.c b/src/libxl/libxl_conf.c
> index 5202ca1..4b758f1 100644
> --- a/src/libxl/libxl_conf.c
> +++ b/src/libxl/libxl_conf.c
> @@ -1559,23 +1559,32 @@ int
> libxlMakeUSB(virDomainHostdevDefPtr hostdev, libxl_device_usbdev *usbdev)
> {
> virDomainHostdevSubsysUSBPtr usbsrc = &hostdev->source.subsys.u.usb;
> + virUSBDevicePtr usb;
Needs initialized to NULL. I encountered a libvirtd segfault without it.
> + int ret = -1;
>
> if (hostdev->mode != VIR_DOMAIN_HOSTDEV_MODE_SUBSYS)
> - return -1;
> + goto cleanup;
> if (hostdev->source.subsys.type != VIR_DOMAIN_HOSTDEV_SUBSYS_TYPE_USB)
> - return -1;
> + goto cleanup;
>
> - if (usbsrc->bus <= 0 || usbsrc->device <= 0) {
> - virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
> - _("libxenlight supports only USB device "
> - "specified by busnum:devnum"));
> - return -1;
> + if ((usbsrc->bus <= 0 || usbsrc->device <= 0) &&
> + (virHostdevFindUSBDevice(hostdev, true, &usb) < 0)) {
> + virReportError(VIR_ERR_OPERATION_FAILED,
> + _("failed to find USB device busnum:devnum "
> + "for %x:%x"),
> + usbsrc->vendor, usbsrc->product);
> + goto cleanup;
> }
>
> usbdev->u.hostdev.hostbus = usbsrc->bus;
> usbdev->u.hostdev.hostaddr = usbsrc->device;
I had to read virHostdevFindUSBDevice to understand how this would work :-). If
the device is found by vendor/product, virHostdevFindUSBDevice sets
hostdev->source.subsys.u.usb->{bus,device}. I don't think we should rely on that
internal behavior and instead set hostbus and hostaddr from usb->{bus,dev}.
Regards,
Jim
>
> - return 0;
> + ret = 0;
> +
> + cleanup:
> + virUSBDeviceFree(usb);
> +
> + return ret;
> }
>
> static int
--
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