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  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:	Sat, 26 Nov 2011 23:17:50 -0800
From:	Justin Pettit <>
Cc:	Jesse Gross <>,,, "David S. Miller" <>
Subject: Re: [ovs-dev] [PATCH net-next 4/4] net: Add Open vSwitch kernel components.

On Nov 24, 2011, at 5:25 AM, jamal wrote:

> The most basic IMO is to use netlink if you are doing
> it from a programmatic interface. You seem to be doing that
> already for other items (eg HTB) in the setup. There are
> a few libraries out there you could use but i realize
> that they may not match your license requirements.
> Maybe you could isolate your netlink code and make it 
> standalone based on the license you use and people who 
> need that could use it.

You're right--calling tc directly through system() is kind of ugly.  That code was written a *long* time ago when we wanted a quick QoS story.  As you mentioned, we use netlink to configure traffic shaping, so we have all the pieces at this point.  I just think no one ever bothered to clean up that little wart in userspace.  I'll put that on my to-do list.  Obviously, this doesn't affect the kernel portions.  Thanks for bringing it to our attention.

> The other thing, is you match every flow on the specific
> virtual port - this may be design intent but it appears
> very inflexible.

We encourage users to use shaping, since it generally provides better results (and we do expose per-flow granularity there).  As a result, we haven't seen a need to improve support for policing.


To unsubscribe from this list: send the line "unsubscribe netdev" in
the body of a message to
More majordomo info at

Powered by blists - more mailing lists