From: Vivien Didelot <vivien.didelot@savoirfairelinux.com>
To: Jiri Pirko <jiri@resnulli.us>
Cc: netdev@vger.kernel.org, linux-kernel@vger.kernel.org,
kernel@savoirfairelinux.com,
"David S. Miller" <davem@davemloft.net>,
"Florian Fainelli" <f.fainelli@gmail.com>,
"Andrew Lunn" <andrew@lunn.ch>,
"Uwe Kleine-König" <uwe@kleine-koenig.org>,
"Andrey Smirnov" <andrew.smirnov@gmail.com>
Subject: Re: [PATCH net-next v2] net: dsa: make "label" property optional for dsa2
Date: Mon, 09 Jan 2017 10:04:50 -0500 [thread overview]
Message-ID: <877f6446lp.fsf@weeman.i-did-not-set--mail-host-address--so-tickle-me> (raw)
In-Reply-To: <20170109073236.GA1862@nanopsycho>
Hi Jiri,
Jiri Pirko <jiri@resnulli.us> writes:
>> # cat /etc/udev/rules.d/90-net-dsa.rules
>> SUBSYSTEM=="net", ACTION=="add", ENV{DEVTYPE}=="dsa", PROGRAM="/lib/udev/dsanitizer $attr{phys_switch_id} $attr{phys_port_id}", NAME="$result"
>
> I know this is kind of confusing, but phys_port_id is to be used to
> indicate same physical port that is shared by multiple netdevices- for
> example sr-iov usecase. For switchdev usecase, you should use
> phys_port_name.
>
> I will add some documentation to kernel regarding this. But I see that
> net/dsa/slave.c already implements .ndo_get_phys_port_id :(
>
> I recently made changes in udev so it names the switch ports according
> to phys_port_name, out of the box, without need for any rules:
> https://github.com/systemd/systemd/pull/4506/commits/c960caa0c2a620fc506c6f0f7b6c40eeace48e4d
Thanks for the details. So if I understand correctly, what will be found
in phys_port_name will be used as is by udev to name the interface?
Extra question: shouldn't phys_port_{id,name} be switchdev attributes in
addition to SWITCHDEV_ATTR_ID_PORT_PARENT_ID?
> I guess that it should be enough for you to implement
> ndo_get_phys_port_name.
Well, if this name must be unique on a system, it's not likely to happen
until we agree that we use an ugly tXsYpZ template where X is a tree ID,
or we assign system-wide unique IDs to switches, which requires a bit of
changes.
I'm thinking, since DSA slaves are switchdev users, can't we all use a
switchdev helper to optionally get a system-wide unique name for a given
switch port? e.g. a template such as "swp%d"? I'd prefer that switchdev
and DSA do not diverge much when it comes to implement such attributes.
But again, this is not related to this patch ;-)
Thanks,
Vivien
next prev parent reply other threads:[~2017-01-09 15:05 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-01-08 23:15 [PATCH net-next v2] net: dsa: make "label" property optional for dsa2 Vivien Didelot
2017-01-08 23:30 ` Andrew Lunn
2017-01-09 2:56 ` Vivien Didelot
2017-01-09 7:32 ` Jiri Pirko
2017-01-09 15:04 ` Vivien Didelot [this message]
2017-01-09 15:11 ` Jiri Pirko
2017-01-09 15:45 ` Vivien Didelot
2017-01-09 16:00 ` Andrew Lunn
2017-01-09 16:07 ` Jiri Pirko
2017-01-09 16:06 ` Jiri Pirko
2017-01-09 17:42 ` Florian Fainelli
2017-01-09 17:58 ` Jiri Pirko
2017-01-09 18:06 ` Florian Fainelli
2017-01-10 9:55 ` Jiri Pirko
2017-01-10 17:58 ` Florian Fainelli
2017-01-11 7:26 ` Jiri Pirko
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