linux-kernel - Re: [PATCH] net: set default DEVTYPE for all ethernet based devices

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Message-ID: <CAG-2HqVH5akkCY_d7=v-EECFzYTfT531t4g6zG9euC4+VgFLWw@mail.gmail.com>
Date:	Fri, 31 Jan 2014 01:54:03 +0100
From:	Tom Gundersen <teg@...m.no>
To:	Veaceslav Falico <vfalico@...hat.com>
Cc:	netdev <netdev@...r.kernel.org>,
	LKML <linux-kernel@...r.kernel.org>,
	Stephen Hemminger <stephen@...workplumber.org>,
	Avinash Kumar <avi.kp.137@...il.com>,
	Simon Horman <horms@...ge.net.au>,
	Marcel Holtmann <marcel@...tmann.org>,
	Greg KH <gregkh@...uxfoundation.org>,
	Kay Sievers <kay@...y.org>
Subject: Re: [PATCH] net: set default DEVTYPE for all ethernet based devices

Hi Veaceslav,

Thanks for your quick reply.

On Thu, Jan 30, 2014 at 4:05 PM, Veaceslav Falico <vfalico@...hat.com> wrote:
> On Thu, Jan 30, 2014 at 02:20:02PM +0100, Tom Gundersen wrote:
>>
>> In systemd's networkd and udevd, we would like to give the administrator a
>> simple way to filter net devices by their DEVTYPE [0][1]. Other software
>> such as ConnMan and NetworkManager uses a similar filtering already.
>>
>> Currently, plain ethernet devices have DEVTYPE=(null). This patch sets the
>> devtype to "ethernet" instead. This avoids the need for special-casing the
>> DEVTYPE=(null) case in userspace, and also avoids false positives, as
>> there
>> are several other types of netdevs that also have DEVTYPE=(null).
>
>
> There are quite a few users at least in usb and wireless drivers:
>
> net#git grep alloc_etherdev drivers/net/wireless/ drivers/net/usb | wc -l
> 18
>
> In usb, though, there might be some false positives of this grep, as
> there are a few devices which might be considered ethernet.

Ah, yes I missed the #define of alloc_etherdev(). Looking through
these, it shouldn't be too hard to keep this patch and additionally
fix up the false positives to opt-out of setting the DEVTYPE. Does
that sound like something that would be acceptable?

Cheers,

Tom
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