netdev - RE: [PATCH 05/20] netfilter: nft_hash: add support for timeouts

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Message-ID: <063D6719AE5E284EB5DD2968C1650D6D1CB17C7C@AcuExch.aculab.com>
Date:	Thu, 9 Apr 2015 13:39:18 +0000
From:	David Laight <David.Laight@...LAB.COM>
To:	'Pablo Neira Ayuso' <pablo@...filter.org>,
	"netfilter-devel@...r.kernel.org" <netfilter-devel@...r.kernel.org>
CC:	"davem@...emloft.net" <davem@...emloft.net>,
	"netdev@...r.kernel.org" <netdev@...r.kernel.org>
Subject: RE: [PATCH 05/20] netfilter: nft_hash: add support for timeouts

From: Pablo Neira Ayuso
> Sent: 09 April 2015 12:35
...
> Add support for element timeouts to nft_hash. The lookup and walking
> functions are changed to ignore timed out elements, a periodic garbage
> collection task cleans out expired entries.

You probably want to delete timed out entries during insert.
If you do that you don't really need a garbage collector.

I'd also worry about re-adding a timed out entry.

	David

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