netdev - Re: Query on usage of Netlink

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Date:	Fri, 08 Oct 2010 12:14:44 +0200
From:	Rémi Denis-Courmont <remi@...lab.net>
To:	Kumar SANGHVI <kumar.sanghvi@...ricsson.com>
Cc:	netdev@...r.kernel.org, srinidhi.kasagar@...ricsson.com,
	linus.walleij@...ricsson.com, sudeep.divakaran@...ricsson.com,
	gulshan.karmani@...ricsson.com
Subject: Re: Query on usage of Netlink


On Fri, 8 Oct 2010 14:21:28 +0530, Kumar SANGHVI
<kumar.sanghvi@...ricsson.com> wrote:
> We have a requirement where-in we want to communicate the status of
> modem (whether modem is online or offline) from linux driver to
> user-space components. So that user-space components stop sending data
> to linux driver for communicating with modem, in case modem goes
> offline.

Is the modem control state machine in kernel space, as for say, 802.11
devices?

> We have decided to use the netlink mechanism to achieve this. We intend
> to send an integer value, defined in enum, to user-space indicating the
> current modem status.
(...)
> Or should we define a custom Netlink type in include/linux/netlink.h?

Did you consider using kobject and uevents (which are internally running on
top of Netlink)?

-- 
Rémi Denis-Courmont
http://www.remlab.net
http://fi.linkedin.com/in/remidenis

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