From mboxrd@z Thu Jan 1 00:00:00 1970 From: Stephen Hemminger Subject: Re: [PATCH] iproute2: hide devices starting with period by default Date: Thu, 23 Feb 2017 16:30:35 -0800 Message-ID: <20170223163035.0a49f04d@xeon-e3> References: <20170223195028.16388-1-stephen@networkplumber.org> <027775d1-ef98-deda-1f8d-bb058d1e4c2f@cumulusnetworks.com> Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Cc: netdev@vger.kernel.org To: David Ahern Return-path: Received: from mail-pf0-f179.google.com ([209.85.192.179]:33793 "EHLO mail-pf0-f179.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751342AbdBXAai (ORCPT ); Thu, 23 Feb 2017 19:30:38 -0500 Received: by mail-pf0-f179.google.com with SMTP id p185so562177pfb.1 for ; Thu, 23 Feb 2017 16:30:37 -0800 (PST) In-Reply-To: <027775d1-ef98-deda-1f8d-bb058d1e4c2f@cumulusnetworks.com> Sender: netdev-owner@vger.kernel.org List-ID: On Thu, 23 Feb 2017 16:39:52 -0700 David Ahern wrote: > On 2/23/17 12:50 PM, Stephen Hemminger wrote: > > Some use cases create Linux networking devices which are not intended for use > > by normal networking. This is an enhancement to ip command to hide network > > devices starting with period (like files in normal directory). Interfaces whose > > name start with "." are not shown by default, and the -a (or -all) flag must > > be used to show these devices. > > Agree that some devices need to be hidden by default -- not just from > users but also other processes. > > This solution is very narrow, only affecting iproute2 users. Any other > programs that use netlink or /proc files will continue to see those devices. I want solution that works broadly. And this works for sysfs already. > I started a patch a year ago that allows devices to marked as invisible > (attribute can be toggled at any time). Invisible devices do not show up > in netlink dumps, proc files or notifications. Netlink dumps can request > invisible devices to be included in a link dump. While it is more > intrusive, it is also more complete covering all of the paths in which > the device is shows up. > > Also, changing the default behavior for iproute2 could break existing > users that have such device names. I am less worried about this. The only people using . in name already are probably Brocade, and they have similar thing in CLI to hide these devices.