netdev - Re: [RFC PATCH 1/4] net: port mirroring: add tracepoints to appropriate network paths

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	Tue, 15 Dec 2009 15:41:55 -0500
From:	Neil Horman <nhorman@...driver.com>
To:	Stephen Hemminger <shemminger@...tta.com>
Cc:	netdev@...r.kernel.org, davem@...emloft.net
Subject: Re: [RFC PATCH 1/4] net: port mirroring: add tracepoints to
	appropriate network paths

On Tue, Dec 15, 2009 at 09:54:06AM -0800, Stephen Hemminger wrote:
> On Tue, 15 Dec 2009 12:49:56 -0500
> Neil Horman <nhorman@...driver.com> wrote:
> 
> > On Tue, Dec 15, 2009 at 09:22:22AM -0800, Stephen Hemminger wrote:
> > > On Tue, 15 Dec 2009 12:02:49 -0500
> > > Neil Horman <nhorman@...driver.com> wrote:
> > > 
> > > > On Tue, Dec 15, 2009 at 08:44:24AM -0800, Stephen Hemminger wrote:
> > > > > On Tue, 15 Dec 2009 11:36:04 -0500
> > > > > Neil Horman <nhorman@...driver.com> wrote:
> > > > > 
> > > > > > Add net_dev_xmit & net_dev_receive tracepoints
> > > > > > 
> > > > > > Add tracepoints at the end of the network stack xmit path and the start of the
> > > > > > stack receive path.  Among other uses, these tracepoints can be used to tap the
> > > > > > raw input and output streams for any given network device for the purposes of
> > > > > > mirroring that traffic to other ports.
> > > > > > 
> > > > > 
> > > > > There already is a mirroring solution but people don't know how to use it.
> > > > > Using mirred on ingress qdisc does that.
> > > > > 
> > > > I wish that had been easier to find.  That only appears to mirror inbound frames
> > > > though, what about outbound frames? can you attach mirred to an outbound qdisc?
> > > 
> > > It works for outbound frames as well.
> > *Sigh*, well there goes a weeks worth of tinkering.  Stupid of me.  Rescinded
> > Thanks
> > Neil
> 
> The tracepoints are still useful, and all is not wasted.
Yeah, but it would be nice to have a recognized feature to go with them, so we
don't just have random tracepoints laying about.  Can you think of a good
alternative use for them?
Regards
Neil

--
To unsubscribe from this list: send the line "unsubscribe netdev" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html