netdev - Re: [RFC] netlink: add socket destruction notification

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Date:	Fri, 06 Nov 2009 16:26:44 +0100
From:	Johannes Berg <johannes@...solutions.net>
To:	Patrick McHardy <kaber@...sh.net>
Cc:	netdev <netdev@...r.kernel.org>, Jouni Malinen <j@...fi>,
	Thomas Graf <tgraf@...g.ch>
Subject: Re: [RFC] netlink: add socket destruction notification

On Fri, 2009-11-06 at 16:21 +0100, Patrick McHardy wrote:
> Johannes Berg wrote:
> > When we want to keep track of resources associated with applications, we
> > need to know when an app is going away. Add a notification function to
> > netlink that tells us that, and also hook it up to generic netlink so
> > generic netlink can notify the families. Due to the way generic netlink
> > works though, we need to notify all families and they have to sort out
> > whatever resources some commands associated with the socket themselves.


> This seems pretty similar to the NETLINK_URELEASE notifier invoked
> in netlink_release(). Wouldn't that one work as well?

Hmm, it does seem similar, thanks for pointing it out. What exactly does
the condition
	if (nlk->pid && !nlk->subscriptions) {

mean though?

johannes


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