Re: Fwd: [PATCH] [-mm] ACPI: export ACPI events via netlink

Zhang Rui
2007-06-15T01:00:12Z

On Thu, 2007-06-14 at 07:28 -0400, jamal wrote:
> On Thu, 2007-14-06 at 16:59 +0800, Zhang Rui wrote:
> > Hi, Jamal,
> >
> > Now the genl utility can find the acpi event genetlink family.
> > And a simple user space demo is finished for handling acpi event.
> > I really appreciate your help. :)
>
> np.
>
> > I think the patch which exposes ACPI events via netlink is ok.
> > But I still have some problems on
> > how to listen to specified genetlink family in user space?
> >
> > I can get the dynamic id for "acpi_event" genl family.
> > But I don't know how to use this to receive messages from
> > specified genl family.
> > It seems that "#genl ctrl monitor" has something to do with this,
> > IMO, rtnl_open_byproto(&rth, nl_mgrp(GENL_ID_CTRL), NETLINK_GENERIC) is
> > used to receive messages from the nlctrl(controller) only, but
> > unfortunately it never works for me. :(
> >
>
> I dont have much time to look at your code given travel, but did you
> try to use your group id instead of the controller's?
> i.e:
> rtnl_open_byproto(&rth, nl_mgrp(mydiscoveredacpiid), NETLINK_GENERIC)
>
Yes. It doesn't work if I use my group id here.
In fact, I'm using rtnl_open_byproto(&rth, 1, NETLINK_GENERIC) now.
That's why I said that this demo receives all the broadcasted genetlink
messages.
> If this doesnt work, ping me and i will take a look - just expect some
> latency in response.
>
That's great. Thanks.

Best regards,
Rui