netdev - Re: [PATCH net-next RFC v2] switchdev: bridge: drop hardware forwarded packets

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:	Fri, 27 Mar 2015 16:19:23 -0700
From:	Scott Feldman <sfeldma@...il.com>
To:	Jiri Pirko <jiri@...nulli.us>
Cc:	roopa <roopa@...ulusnetworks.com>,
	Florian Fainelli <f.fainelli@...il.com>,
	Guenter Roeck <linux@...ck-us.net>,
	John Fastabend <john.fastabend@...il.com>,
	Andrew Lunn <andrew@...n.ch>,
	David Miller <davem@...emloft.net>,
	"Arad, Ronen" <ronen.arad@...el.com>,
	Netdev <netdev@...r.kernel.org>
Subject: Re: [PATCH net-next RFC v2] switchdev: bridge: drop hardware
 forwarded packets

On Fri, Mar 27, 2015 at 12:01 AM, Jiri Pirko <jiri@...nulli.us> wrote:
> Fri, Mar 27, 2015 at 07:43:35AM CET, sfeldma@...il.com wrote:
>>On Thu, Mar 26, 2015 at 7:49 AM, Jiri Pirko <jiri@...nulli.us> wrote:
>>> Thu, Mar 26, 2015 at 03:28:28PM CET, sfeldma@...il.com wrote:
>>
>>>>What is the argument for not allowing stacked version of swdev_parent_id_get()?
>>>
>>> That was suppose wo identify a switch port. "ip link" will show you that
>>> and you see right away what is going on. If bond implements that, that
>>> brigs a mess. I don't like that.
>>
>>A bond is an aggregator of ports and showing switch_id for bond is no
>>more messy than showing link speed for bond, derived from link speed
>>on member ports.
>
> Well, I don't think so. I think the switchid should be showed on port
> devices only.

That's doable by making switchid sysfs and netlink interfaces (the
user-visible interfaces) not recurse, and for internal usage, to get
switchid of aggregate device, allow recursion.  I'll be posting
patches soon so you'll see what I mean from code.

> Please remind me why exactly you need this?

Central theme of this thread: to know if bcast/mcast/unknown ucast
pkts should be flooded by bridge or not on ports hardware may have
already flooded.

> Also should switch id be showed on other devices? Like bridges, vlans,
> macvlans, etc?
> For bond it sometimes will be shown (2ports of the same switch)
> sometimes not (2ports each of the different switch).
> That looks messy to me. I might be wrong of course...

No problem, we'll make only the base port device show switchid.

-scott
--
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