Re: [Xen-devel] [PATCH] xenbus: Add support for xenbus backend in stub domain

["Jan Beulich" <JBeulich@xxxxxxxx>]

>>> On 13.01.12 at 00:36, Daniel De Graaf <dgdegra@xxxxxxxxxxxxx> wrote:
> --- a/include/xen/xenbus_dev.h
> +++ b/include/xen/xenbus_dev.h
> @@ -38,4 +38,18 @@
>  #define IOCTL_XENBUS_BACKEND_EVTCHN                  \
>       _IOC(_IOC_NONE, 'B', 0, 0)
>  
> +#define IOCTL_XENBUS_ALLOC                           \
> +     _IOC(_IOC_NONE, 'B', 1, sizeof(struct ioctl_xenbus_alloc))
> +struct ioctl_xenbus_alloc {
> +     /* IN */
> +     /* The domain ID (must exist) for xenstore */
> +     uint16_t dom;
> +     uint16_t pad;
> +     /* OUT */
> +     /* The port allocated for xenbus communication */
> +     uint32_t port;
> +     /* Always set to GNTTAB_RESERVED_XENSTORE */
> +     uint32_t grant_ref;
> +};

As said in my reply to the previous patch version - if the functionality
differs, the number *and* name should be different from the legacy
implementation's. Otherwise, how should compatible user space code
be written?

Jan

> +
>  #endif /* __LINUX_XEN_XENBUS_DEV_H__ */



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