Re: [Xen-devel] [PATCH] Paravirt framebuffer frontend kernel support [1/5]

[Markus Armbruster <armbru@xxxxxxxxxx>]

Ewan Mellor <ewan@xxxxxxxxxxxxx> writes:

> On Thu, Nov 02, 2006 at 11:10:12AM +0100, Markus Armbruster wrote:
>
>> I'm now looking into a conversion to xenbus_driver API.  I started
>> with copying some voodoo from blkfront.c.  My
>> xenbus_register_frontend() succeeds.  Stupid question: what triggers
>> running of the probe function?  Because mine doesn't.
>
> Either the watch firing when the correct entries in the store are written (for
> hotplugging) or it probes those paths at startup.
>
> xenbus/xenbus_probe.c:
>
> frontend_changed ->
> dev_changed ->
> xenbus_probe_node ->
> device_register
>
> or
>
> xenbus_probe_init ->
> xenbus_probe ->
> xenbus_probe_devices ->
> xenbus_probe_device_type ->
> bus->probe ->
> xenbus_probe_frontend ->
> xenbus_probe_node ->
> device_register
>
> The device_register causes a the specific frontend device to be registered,
> which triggers the probe.
>
> HTH,
>
> Ewan.

Okay, thanks.  Next stupid question: I'm looking for a *user space*
xenbus_register_backend().  Where is it?

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