linux-kernel - Re: [IPV6]: Audit all ip6_dst_lookup/ip6_dst

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Date:	Sun, 30 Jul 2006 15:44:16 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	herbert@...dor.apana.org.au
Cc:	yoshfuji@...ux-ipv6.org, Matt_Domsch@...l.com,
	linux-kernel@...r.kernel.org, netdev@...r.kernel.org
Subject: Re: [IPV6]: Audit all ip6_dst_lookup/ip6_dst_store calls

From: Herbert Xu <herbert@...dor.apana.org.au>
Date: Sat, 29 Jul 2006 14:33:25 +1000

> [IPV6]: Audit all ip6_dst_lookup/ip6_dst_store calls
> 
> The current users of ip6_dst_lookup can be divided into two classes:
> 
> 1) The caller holds no locks and is in user-context (UDP).
> 2) The caller does not want to lookup the dst cache at all.
> 
> The second class covers everyone except UDP because most people do
> the cache lookup directly before calling ip6_dst_lookup.  This patch
> adds ip6_sk_dst_lookup for the first class.
> 
> Similarly ip6_dst_store users can be divded into those that need to
> take the socket dst lock and those that don't.  This patch adds
> __ip6_dst_store for those (everyone except UDP/datagram) that don't
> need an extra lock.
> 
> Signed-off-by: Herbert Xu <herbert@...dor.apana.org.au>

Applied, thanks Herbert.
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