linux-kernel - Re: network interfaces called "all", "default" or "config"

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Message-ID: <CAHA+R7MLQtYF5vBN0D66Wk8iyGZABf5=Az293gUH6w=4THv8Gw@mail.gmail.com>
Date:	Thu, 14 Aug 2014 11:37:53 -0700
From:	Cong Wang <cwang@...pensource.com>
To:	Stephane Chazelas <stephane.chazelas@...il.com>
Cc:	Randy Dunlap <rdunlap@...radead.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"netdev@...r.kernel.org" <netdev@...r.kernel.org>
Subject: Re: network interfaces called "all", "default" or "config"

On Thu, Aug 14, 2014 at 2:41 AM, Stephane Chazelas
<stephane.chazelas@...il.com> wrote:
> By the way, this is related:
>
> $ ip link add link eth0 eth0:123 type vlan id 123
> $ ip link del link eth0 eth0:123
> RTNETLINK answers: Operation not supported

Kernel reads "eth0:123" as an alias of "eth0", so it will just
truncate the dev name into "eth0":


        ifr.ifr_name[IFNAMSIZ-1] = 0;

        colon = strchr(ifr.ifr_name, ':');
        if (colon)
                *colon = 0;
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