netdev - Re: [PATCH] net: dsa: mv88e6xxx: egress all frames

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, 22 Nov 2016 16:03:30 +0100
From:   Andrew Lunn <andrew@...n.ch>
To:     Stefan Eichenberger <eichest@...il.com>
Cc:     vivien.didelot@...oirfairelinux.com, f.fainelli@...il.com,
        netdev@...r.kernel.org,
        Stefan Eichenberger <stefan.eichenberger@...module.com>
Subject: Re: [PATCH] net: dsa: mv88e6xxx: egress all frames

On Tue, Nov 22, 2016 at 11:39:44AM +0100, Stefan Eichenberger wrote:
> Egress multicast and egress unicast is only enabled for CPU/DSA ports
> but for switching operation it seems it should be enabled for all ports.
> Do I miss something here?
> 
> I did the following test:
> brctl addbr br0
> brctl addif br0 lan0
> brctl addif br0 lan1
> 
> In this scenario the unicast and multicast packets were not forwarded,
> therefore ARP requests were not resolved, and no connection could be
> established.

Hi Stefan

This is probably specific to the 6097 family. It works fine without
this on other devices. Creating a bridge like above and pinging across
it is one of my standard tests. But i only test modern devices like
the 6165, 6352, 6351, 6390 families.

In fact, you might need to review all the code and look where
mv88e6xxx_6095_family(chip) is used and consider if you need to add
mv88e6xxx_6097_family(chip). e.g.

        if (mv88e6xxx_6095_family(chip) || mv88e6xxx_6185_family(chip)) {
                /* Set the upstream port this port should use */
                reg |= dsa_upstream_port(ds);
                /* enable forwarding of unknown multicast addresses to
                 * the upstream port
                 */
                if (port == dsa_upstream_port(ds))
                        reg |= PORT_CONTROL_2_FORWARD_UNKNOWN;
        }

Maybe this is your problem?

	Andrew