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From: "Bjørn Mork" <bjorn@mork.no>
To: Tom Gundersen <teg@jklm.no>
Cc: netdev@vger.kernel.org, linux-kernel@vger.kernel.org,
	David Miller <davem@davemloft.net>,
	David Herrmann <dh.herrmann@gmail.com>,
	Kay Sievers <kay@vrfy.org>,
	dingtianhong <dingtianhong@huawei.com>,
	Tan Xiaojun <tanxiaojun@huawei.com>,
	WANG Cong <xiyou.wangcong@gmail.com>
Subject: Re: [PATCH v7 10/33] net: dummy - set name assign type
Date: Thu, 10 Jul 2014 11:31:29 +0200	[thread overview]
Message-ID: <87pphdh85q.fsf@nemi.mork.no> (raw)
In-Reply-To: <1404980258-30853-11-git-send-email-teg@jklm.no> (Tom Gundersen's message of "Thu, 10 Jul 2014 10:17:15 +0200")

Tom Gundersen <teg@jklm.no> writes:

> A fixed number of indistinguishable dummy devices are allocated at module init time,
> the names are therefore PREDICTABLE rather than ENUM.

OK?  So if I go do

 modprobe dummy numdummies=2
 ip link add type dummy
 ip link add type dummy

then I'd have dummy0 and dummy1 with NET_NAME_PREDICTABLE, but dummy2 and
dummy3 with NET_NAME_ENUM (from your rtnetlink patch).

I think this just demonstrates that there aren't that many different
name types.  There is no real difference between your NET_NAME_ENUM and
NET_NAME_PREDICTABLE, resulting in arbitrary choices like this one.

The same goes for NET_NAME_USER and NET_NAME_RENAMED. These are the same
from a kernel point of view.  If userspace wants to keep track of device
name history then it is free to do so without any need for a RENAMED
type.


Bjørn

  reply	other threads:[~2014-07-10  9:33 UTC|newest]

Thread overview: 68+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2014-07-10  8:17 [PATCH v7 00/33] Provide netdev naming-policy via sysfs Tom Gundersen
2014-07-10  8:17 ` [PATCH v7 01/33] net: add name_assign_type netdev attribute Tom Gundersen
2014-07-10 15:53   ` Nicolas Dichtel
2014-07-10 20:00     ` Tom Gundersen
2014-07-10 19:58   ` Arend van Spriel
2014-07-10 20:01     ` Tom Gundersen
2014-07-10  8:17 ` [PATCH v7 02/33] net: set name assign type for renamed devices Tom Gundersen
2014-07-10  8:17 ` [PATCH v7 03/33] net: set name_assign_type in alloc_netdev() Tom Gundersen
2014-07-10  9:16   ` Bjørn Mork
2014-07-10 10:21     ` Tom Gundersen
2014-07-10 11:29       ` Bjørn Mork
2014-07-10 13:02         ` Tom Gundersen
2014-07-10 13:27           ` Bjørn Mork
2014-07-10  8:17 ` [PATCH v7 04/33] net: set name assign type for names assigned using a static template Tom Gundersen
2014-07-10  8:52   ` Marc Kleine-Budde
2014-07-10  8:17 ` [PATCH v7 05/33] net: set name assign type for names assigned using a static string Tom Gundersen
2014-07-10  8:17 ` [PATCH v7 06/33] net: set name assign type for names passed directly from userspace Tom Gundersen
2014-07-10  8:17 ` [PATCH v7 07/33] net: rtnetlink - make create_link take name_assign_type Tom Gundersen
2014-07-10  8:17 ` [PATCH v7 08/33] net: nl80211 - make rdev_add_virtual_intf " Tom Gundersen
2014-07-21  9:40   ` Johannes Berg
2014-07-21 17:03     ` Tom Gundersen
2014-07-10  8:17 ` [PATCH v7 09/33] net: nl802154 - make add_iface take name assign type Tom Gundersen
2014-07-10 10:52   ` Alexander Aring
2014-07-10  8:17 ` [PATCH v7 10/33] net: dummy - set " Tom Gundersen
2014-07-10  9:31   ` Bjørn Mork [this message]
2014-07-10 10:12     ` Tom Gundersen
2014-07-10 10:26       ` David Herrmann
2014-07-10 10:33         ` Tom Gundersen
2014-07-10 11:44       ` Bjørn Mork
2014-07-10 12:18         ` Tom Gundersen
2014-07-10  8:17 ` [PATCH v7 11/33] net: af_netrom " Tom Gundersen
2014-07-10  8:17 ` [PATCH v7 12/33] net: af_rose " Tom Gundersen
2014-07-10  8:17 ` [PATCH v7 13/33] net: mrt " Tom Gundersen
2014-07-10  8:17 ` [PATCH v7 14/33] net: caif_serial " Tom Gundersen
2014-07-10  8:17 ` [PATCH v7 15/33] net: xen-netback " Tom Gundersen
2014-07-10  8:25   ` Varka Bhadram
2014-07-10  9:01   ` Ian Campbell
2014-07-10 10:46     ` Tom Gundersen
2014-07-10 12:13       ` Ian Campbell
2014-07-10  8:17 ` [PATCH v7 16/33] net: gdm_lte " Tom Gundersen
2014-07-10  8:17 ` [PATCH v7 17/33] net: airo " Tom Gundersen
2014-07-10  8:17 ` [PATCH v7 18/33] net: arcdev - label alloc_arcdev names Tom Gundersen
2014-07-10  8:17 ` [PATCH v7 19/33] net: isdn - set name assign type Tom Gundersen
2014-07-10  8:17 ` [PATCH v7 20/33] net: irlan " Tom Gundersen
2014-07-10  8:17 ` [PATCH v7 21/33] net: batman-adv " Tom Gundersen
2014-07-10  8:17 ` [PATCH v7 22/33] net: hamradio " Tom Gundersen
2014-07-10  8:17 ` [PATCH v7 23/33] net: openvswitch " Tom Gundersen
2014-07-10  8:17 ` [PATCH v7 24/33] net: vlan " Tom Gundersen
2014-07-10  8:17 ` [PATCH v7 25/33] net: infiniband - steal ifname label Tom Gundersen
2014-07-10  8:17 ` [PATCH v7 26/33] net: ipoib - set name assign type Tom Gundersen
2014-07-10  8:17 ` [PATCH v7 27/33] net: tile " Tom Gundersen
2014-07-16 17:49   ` Chris Metcalf
2014-07-10  8:17 ` [PATCH v7 28/33] net: dsa " Tom Gundersen
2014-07-10  8:17 ` [PATCH v7 29/33] net: brcmfmac " Tom Gundersen
2014-07-10 20:08   ` Arend van Spriel
2014-07-10 20:24     ` Tom Gundersen
2014-07-11  7:45       ` Arend van Spriel
2014-07-15 19:39   ` John W. Linville
2014-07-15 19:57     ` Tom Gundersen
2014-07-10  8:17 ` [PATCH v7 30/33] net: ppp " Tom Gundersen
2014-07-10  8:17 ` [PATCH v7 31/33] net: slcan " Tom Gundersen
2014-07-10  8:51   ` Marc Kleine-Budde
2014-07-10  8:17 ` [PATCH v7 32/33] net: x25_asy " Tom Gundersen
2014-07-10  8:17 ` [PATCH v7 33/33] net: slip " Tom Gundersen
2014-07-10  8:43 ` [PATCH v7 00/33] Provide netdev naming-policy via sysfs David Miller
2014-07-10  9:19   ` Tom Gundersen
2014-07-10 19:11     ` Tom Gundersen
2014-07-10 19:19     ` David Miller

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