From: Oleg <lego12239@yandex.ru>
To: Florian Westphal <fw@strlen.de>
Cc: netfilter-devel@vger.kernel.org
Subject: Re: libnetfilter_queue & multithreading & 1 queue freezing
Date: Sun, 27 Aug 2017 15:19:00 +0300 [thread overview]
Message-ID: <20170827121900.GA25231@legohost> (raw)
In-Reply-To: <20170826192625.GD29355@breakpoint.cc>
On Sat, Aug 26, 2017 at 09:26:25PM +0200, Florian Westphal wrote:
> Oleg <lego12239@yandex.ru> wrote:
> > Hi, all.
> >
> > My program process multiple NFQUEUEs by creating a separate thread
> > for every NFQUEUE. An each thread do recv() and nfq_set_verdict2():
> >
> > But i catch a strange behaviour when more than 1 thread(queue) are
> > used. In those cases one queue "freeze" while others works right.
> > For example, for 5 queues(here a queue with id 1 "freeze"):
>
> If you use libnetfilter_queue you might need
>
> commit 4ca06bc967d94b7b7b5a6efc76e870f0efc77e24
> src: make nfq_open_nfnl thread-safe
>
> (or protect nfq_open_nfnl calls with a mutex).
A mutex around nfq_open() seems to work. At least, 30 restarts
didn't show a frozen on recvfrom() queue.
Thanks!
--
Олег Неманов (Oleg Nemanov)
prev parent reply other threads:[~2017-08-27 12:16 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-08-26 15:07 libnetfilter_queue & multithreading & 1 queue freezing Oleg
2017-08-26 19:26 ` Florian Westphal
2017-08-27 12:19 ` Oleg [this message]
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