netdev - Re: [PATCH net-next-2.6] netfilter: allow nf_tproxy

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Date:	Wed, 23 Jun 2010 11:55:58 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	fw@...len.de
Cc:	jpirko@...hat.com, netdev@...r.kernel.org, kaber@...sh.net
Subject: Re: [PATCH net-next-2.6] netfilter: allow nf_tproxy_core module to
 be removed

From: Florian Westphal <fw@...len.de>
Date: Wed, 23 Jun 2010 20:46:11 +0200

> tproxy assigns skb->destructor, what prevents module unload while such skbs may
> still be around?

The only reference to nf_tproxy_core.ko is for the symbol, "nf_tproxy_assign_sock".
xt_TPROXY.c, which references this symbol, thus creates a symbol dependency on this
module, so xt_TPROXY.o needs to unload before nf_tproxy_core.ko can unload, and
xt_TPROXY.o has it's own manner for handling module references properly.
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