From: Eric Dumazet <eric.dumazet@gmail.com>
Date: Mon, 18 Jul 2011 14:08:07 +0000 (+0200)
Subject: netfilter: nfnetlink: add RCU in nfnetlink_rcv_msg()
X-Git-Tag: v3.1-rc1~316^2~70^2~6
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=6b75e3e8d664a9a1b99d31a7f4976ae70d1d090a;p=pandora-kernel.git

netfilter: nfnetlink: add RCU in nfnetlink_rcv_msg()

Goal of this patch is to permit nfnetlink providers not mandate
nfnl_mutex being held while nfnetlink_rcv_msg() calls them.

If struct nfnl_callback contains a non NULL call_rcu(), then
nfnetlink_rcv_msg() will use it instead of call() field, holding
rcu_read_lock instead of nfnl_mutex

Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
CC: Florian Westphal <fw@strlen.de>
CC: Eric Leblond <eric@regit.org>
Signed-off-by: Patrick McHardy <kaber@trash.net>
---

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