netdev - Re: [v1 PATCH 7/14] netfilter: Use rhashtable_lookup instead of lookup

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Message-ID: <20150320092216.GE21258@acer.localdomain>
Date:	Fri, 20 Mar 2015 09:22:17 +0000
From:	Patrick McHardy <kaber@...sh.net>
To:	Herbert Xu <herbert@...dor.apana.org.au>
Cc:	Thomas Graf <tgraf@...g.ch>, David Miller <davem@...emloft.net>,
	netdev@...r.kernel.org, Eric Dumazet <eric.dumazet@...il.com>
Subject: Re: [v1 PATCH 7/14] netfilter: Use rhashtable_lookup instead of
 lookup_compare

On 20.03, Herbert Xu wrote:
> On Mon, Mar 16, 2015 at 11:13:46AM +0000, Patrick McHardy wrote:
> >
> > An upcoming patchset will add transaction support to sets, which needs
> > the callback. So please leave it for know since it will only cause
> > unnecessary churn.
> 
> Patrick, can you explain what you mean by the callback?

I need the compare functions for transaction support to decide whether
an element is already activated or has been deactivated and, with a
further patch, for timeouts. Inactive and timed out elements are treated
as non-existant but are in case of transactions present in the hash
until the transaction is committed, in case of timeouts until GC.
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