From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from lists.zx2c4.com (lists.zx2c4.com [165.227.139.114]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 17E07EB64DC for ; Fri, 14 Jul 2023 21:48:36 +0000 (UTC) Received: by lists.zx2c4.com (ZX2C4 Mail Server) with ESMTP id 3f7c1c7a; Fri, 14 Jul 2023 21:48:35 +0000 (UTC) Received: from mail-yw1-x1133.google.com (mail-yw1-x1133.google.com [2607:f8b0:4864:20::1133]) by lists.zx2c4.com (ZX2C4 Mail Server) with ESMTPS id e025483e (TLSv1.3:TLS_AES_256_GCM_SHA384:256:NO) for ; Fri, 14 Jul 2023 21:48:33 +0000 (UTC) Received: by mail-yw1-x1133.google.com with SMTP id 00721157ae682-5774335bb2aso24328657b3.0 for ; Fri, 14 Jul 2023 14:48:33 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20221208; t=1689371312; x=1691963312; h=content-transfer-encoding:in-reply-to:cc:from:references:to :content-language:subject:user-agent:mime-version:date:message-id :from:to:cc:subject:date:message-id:reply-to; bh=WvBOqcgV4pQy+o1De7+OIq25LQENzGHaJQ44F6EPSzU=; b=cvW1WBMQq7KUFG4UJqtqFWcThvLEV/aZrWLOmOCltOHHUfClUZ6p5ZgzC6PY4GayAI YePS7Kbv8h1nZ11w87QuovZgKLHioQ7L7XEkDSS4Qgz8ODSRz9tmGxYelHpnqEmv5ew1 y0qMIpuunanH1NaIiuuwDB9QYFhHHeK9Uxa1kK9ON67roa3D2sdE6S0dtNnAtZBjEERg iZJPbcZPKoe+9FF3TOlC+CxsC37SD5KfDkL3V2EH+DE1I1MjbE66p3vnR7DR3PTypfMo Qe+CjbiU4Xci1t7Pj7+bvWaqBuFnfaAoEW4Bkv4AGOzoU7WuewmGiJzJfZyb/LHaJMfK 2jWg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1689371312; x=1691963312; h=content-transfer-encoding:in-reply-to:cc:from:references:to :content-language:subject:user-agent:mime-version:date:message-id :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=WvBOqcgV4pQy+o1De7+OIq25LQENzGHaJQ44F6EPSzU=; b=ZdODRoxlyJDd9NslewIPQopnR4v6FgUhoJ9oy+37xwt8+/tSy5UYi4DJffy4loRz0E YJMJNzoL5zE+WoJXOTWuAE8ARzWZNk0ehUeS5fvF1q4DEz32Pt/jWgFoki7o7/FqXH7q m2j7/ThEEqHXy0tp3tFT+GVELwYyrDk/Ue3LaRQQ9Ubg4vakIUoLMCSGJcRjgIFbeApQ Bqi/vO0j6QwAExnHGRJWWqJrwnImSHi4bZMa/oLojOLYEBk2OFYmZ4RL8MzEJuAMN9Mz gZxx5DBRE88sBHPknx6BSwB7/+ivgRuYbe/sPE8AsTyOu25QOyLaESVwQzqDPwM+XUip EZBA== X-Gm-Message-State: ABy/qLbjlTKlwP2oKGp8vEzwrBOR98yl8L1PCMghrna5iUYNaPwCs27i R3wrrjVWwHoFyHph2DKR0reFy4Qnq7I= X-Google-Smtp-Source: APBJJlGVB2t97+44CrRWbP9wWVF4VQ0/CmOjZsMfzdTi64NR69s7FeHAHJd+hRMvc2gKBNuX/PAtwg== X-Received: by 2002:a81:6306:0:b0:570:899f:3a52 with SMTP id x6-20020a816306000000b00570899f3a52mr6274451ywb.35.1689371312146; Fri, 14 Jul 2023 14:48:32 -0700 (PDT) Received: from [10.12.114.193] ([208.38.235.124]) by smtp.gmail.com with ESMTPSA id i184-20020a0dc6c1000000b005771872a8dbsm2538855ywd.132.2023.07.14.14.48.31 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Fri, 14 Jul 2023 14:48:31 -0700 (PDT) Message-ID: <3a110fda-8fc0-d2d3-e866-2a975cce085b@gmail.com> Date: Fri, 14 Jul 2023 16:48:30 -0500 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:102.0) Gecko/20100101 Thunderbird/102.13.0 Subject: Re: ip netns del zaps wg link Content-Language: en-US To: wireguard@lists.zx2c4.com References: <4fd6c9cb-c2cf-7a16-ee62-d958790652ea@gmail.com> From: Harry G Coin Cc: maarten@de-vri.es In-Reply-To: Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit X-BeenThere: wireguard@lists.zx2c4.com X-Mailman-Version: 2.1.30rc1 Precedence: list List-Id: Development discussion of WireGuard List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: wireguard-bounces@lists.zx2c4.com Sender: "WireGuard" On 7/14/23 05:27, Maarten de Vries wrote: > On 18/05/2023 01:13, Harry G Coin wrote: >> First, Hi and thanks for all the effort! >> >> At least on Ubuntu latest LTS:  As advertised, if a wireguard link >> gets created by systemd/networkd, then set into a different net >> namespace, all works well. >> >> However, if that namespace is deleted, the link appears to be 'gone >> forever'.  Other link types reappear in the primary namespace when >> the namespace they are in gets deleted.   I'm not sure whether the >> link retains its 'up' or 'down' state when the namespace it's in gets >> deleted and reset to primary.  Not a big deal, doesn't happen often. >> >> This is 100% repeatable.   Some other answer than 'inaccessible until >> the next reboot' would be nice. >> >> > > Hi, > > This behavior is exactly what I would expect. I'm using namespaces to > restrict access to a wireguard link. If the namespace gets destroyed, > I absolutely do not want other programs to have access to the > wireguard link. > > You can simply re-create the wireguard link to use it again. This may > not be the most convenient for you, but your use case seems to be a > bit unconventional: you are moving and deleting a resource created by > systemd and/or networkd manually. You are mixing automatic and manual > management, so there is a risk of breaking the automatic management. > > Alternatively, you could move the interface back before deleting the > namespace. > > Kind regards, > > Maarten de Vries > Hi, It's worth thinking about the only means by which a namespace 'gets destroyed'. The point of systemd/networkd for most of us is similarity and convenience and uniformity in initialization across interface device types.  That frees later choices in nic management to involve only the detail specific to those choices.  Remember systemd/networkd (can be just one-and-done setup time management) is a very different thing than NetworkManager (Automatic active ongoing management).  Someday I hope systemd/networkd adds namespace comprehension. As wireguard and namespaces management are both limited to the root user, who presumably is aware of the security implications involved, and wireguard's birth in the initial namespace is a selling point no matter how it moves among namespaces later: allowing wireguard interfaces to behave like all other interfaces when a namespace is destroyed  (moving back to the namespace where it was born and to which it retains connection anyhow) avoids imposing further 'wireguard only' admin burden.   It might be convenient to automatically set the wireguard link 'down' as the interface transitions back from the namespace being destroyed to the primary so as to avoid any possibility of overlapping existing entries in the primary routing table.  But destroying the interface altogether generates admin burden beyond need. Thanks for all the wireguard work! Harry Coin