netdev - Re: [PATCH net-next v2] bridge: vlan: allow to suppress local mac install for all vlans

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, 25 Aug 2015 17:56:27 -0700
From:	Stephen Hemminger <stephen@...workplumber.org>
To:	Nikolay Aleksandrov <razor@...ckwall.org>
Cc:	netdev@...r.kernel.org, vyasevic@...hat.com,
	toshiaki.makita1@...il.com, bridge@...ts.linux-foundation.org,
	wkok@...ulusnetworks.com, davem@...emloft.net,
	Nikolay Aleksandrov <nikolay@...ulusnetworks.com>
Subject: Re: [PATCH net-next v2] bridge: vlan: allow to suppress local mac
 install for all vlans

On Tue, 25 Aug 2015 17:34:55 -0700
Nikolay Aleksandrov <razor@...ckwall.org> wrote:

> From: Nikolay Aleksandrov <nikolay@...ulusnetworks.com>
> 
> This patch adds a new knob that, when enabled, allows to suppress the
> installation of local fdb entries in newly created vlans. This could
> pose a big scalability issue if we have a large number of ports and a
> large number of vlans, e.g. in a 48 port device with 2000 vlans these
> entries easily go up to 96000.
> Note that packets for these macs are still received properly because they
> are added in vlan 0 as "own" macs and referenced when fdb lookup by vlan
> results in a miss.
> Also note that vlan membership of ingress port and the bridge device
> as egress are still being correctly enforced.
> 
> The default (0/off) is keeping the current behaviour.
> 
> Based on a patch by Wilson Kok (wkok@...ulusnetworks.com).


This is getting messy, but then again the bridge seems to have become
a ghetto for a long time. I would rather see the lookup code fixed so
that the fdb was correct.
--
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