Re: [Xen-devel] [PATCH V3 3/6] libxl: add pvusb API

[George Dunlap <George.Dunlap@xxxxxxxxxxxxx>]

On Sun, Apr 19, 2015 at 4:50 AM, Chunyan Liu <cyliu@xxxxxxxx> wrote:
> +int libxl_device_usbctrl_getinfo(libxl_ctx *ctx, uint32_t domid,
> +                                libxl_device_usbctrl *usbctrl,
> +                                libxl_usbctrlinfo *usbctrlinfo)
> +{
> +    GC_INIT(ctx);
> +    char *dompath, *usbctrlpath;
> +    char *val;
> +    int rc = 0;
> +
> +    usbctrlinfo->devid = usbctrl->devid;
> +    usbctrlinfo->ports = usbctrl->ports;
> +    usbctrlinfo->version = usbctrl->version;

...and following on from the previous mail, it looks like the other
device_*_getinfo() functions *only* read devid -- which means you just
have to make the struct and fill in devid, and getinfo() will tell
*you* the ports, the version, and so on.

 -George

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