From: Stephen Hemminger <shemminger@vyatta.com>
To: Claude Robitaille <clauder@accedian.com>
Cc: Mark Smith <ipng@69706e6720323030352d30312d31340a.nosense.org>,
netdev@vger.kernel.org
Subject: Re: sk_buff handling in packet handler
Date: Sun, 17 May 2009 22:38:47 -0700 [thread overview]
Message-ID: <20090517223847.168d9ebd@nehalam> (raw)
In-Reply-To: <4A104825.4000201@accedian.com>
On Sun, 17 May 2009 13:23:49 -0400
Claude Robitaille <clauder@accedian.com> wrote:
> Thanks Mark.
>
> very interesting
>
> this helped me but just to get to next problem....
>
> what I am trying to do is to receive frame using a packet handler,
> manipulate it and send a portion of it over a UDP channel. I am using
> sock_sendmsg. Things sort of work but I get some warnings while in
> net_tx_action (via the sendmsg I am guessing) about doing scheduling
> while in atomic and sometime the kernel simply completely crashes. All
> this probably means that using kernel socket functions cannot be used
> from any context.... Any suggestion on how to properly do this?
> Ultimately, I'd like to avoid copying the data so if I could simply send
> an skb to some UDP TX handler would be ideal but if not, what is the
> best approach?
>
Write a netfilter module, it is easier to do what you are trying to
do with iptables rules.
>
--
next prev parent reply other threads:[~2009-05-18 5:38 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-05-17 0:55 sk_buff handling in packet handler Mark Smith
2009-05-17 17:23 ` Claude Robitaille
2009-05-18 5:38 ` Stephen Hemminger [this message]
2009-05-19 22:41 ` Claude Robitaille
-- strict thread matches above, loose matches on Subject: below --
2009-05-16 16:31 Claude Robitaille
2009-05-16 20:19 ` Evgeniy Polyakov
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