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[2620:137:e000::1:20]) by mx.google.com with ESMTP id i13-20020a170902c94d00b0014f797b6ea7si10841618pla.89.2022.02.28.09.46.13; Mon, 28 Feb 2022 09:46:31 -0800 (PST) Received-SPF: pass (google.com: domain of linux-nfs-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20; Authentication-Results: mx.google.com; dkim=pass header.i=@redhat.com header.s=mimecast20190719 header.b=QMt7PDGC; spf=pass (google.com: domain of linux-nfs-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-nfs-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=redhat.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S237567AbiB1Pe2 (ORCPT + 99 others); Mon, 28 Feb 2022 10:34:28 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:56274 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S237217AbiB1Pe1 (ORCPT ); Mon, 28 Feb 2022 10:34:27 -0500 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.129.124]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id CB88D3BBFC for ; Mon, 28 Feb 2022 07:33:48 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1646062427; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=ozv258jxbTEl9R1jaOd101OO92B/s4cqsl1sObYtu+c=; b=QMt7PDGCg+EparTHHdfB/27ufB0W/Pa8z0BdMvqpu5SS4dF8awojAFBwus8jANHtwuR9Q+ 86HA4kWjXo8pOo5RE9BAaCDikpRkN6/mOFjNZxyRvF615PL7eRL16iKN/XUUbAa5yLhrcw J3k00M/Wx2q6W8JPjL9lOaFPR+71jOo= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-319-dKWGPRITOS6NMX1vB9mQ2g-1; Mon, 28 Feb 2022 10:33:44 -0500 X-MC-Unique: dKWGPRITOS6NMX1vB9mQ2g-1 Received: from smtp.corp.redhat.com (int-mx06.intmail.prod.int.phx2.redhat.com [10.5.11.16]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 26D441854E27; Mon, 28 Feb 2022 15:33:43 +0000 (UTC) Received: from [10.10.66.2] (ovpn-66-2.rdu2.redhat.com [10.10.66.2]) by smtp.corp.redhat.com (Postfix) with ESMTPS id 909EB7D3E4; Mon, 28 Feb 2022 15:33:42 +0000 (UTC) From: "Benjamin Coddington" To: "Trond Myklebust" Cc: neilb@suse.de, linux-nfs@vger.kernel.org, anna.schumaker@netapp.com Subject: Re: [PATCH] NFSv4: use unique client identifiers in network namespaces Date: Mon, 28 Feb 2022 10:33:41 -0500 Message-ID: <786D4105-B1D4-47B9-9B0B-166F6C0E6ABD@redhat.com> In-Reply-To: <88a6445c7d7cde971479cae70ca0eb62f68ff96e.camel@hammerspace.com> References: <6e05bf321ff50785360e6c339d111db368e7dfda.1644349990.git.bcodding@redhat.com> <189aba691b341f64f653817c9cdf018ef34ac257.camel@hammerspace.com> <7CDAEA98-3A8D-459A-80FE-82AA58A4EDA2@redhat.com> <164600585213.15631.6635814364853064416@noble.neil.brown.name> <88a6445c7d7cde971479cae70ca0eb62f68ff96e.camel@hammerspace.com> MIME-Version: 1.0 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 8bit X-Scanned-By: MIMEDefang 2.79 on 10.5.11.16 X-Spam-Status: No, score=-3.2 required=5.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_LOW, RCVD_IN_MSPIKE_H5,RCVD_IN_MSPIKE_WL,SPF_HELO_NONE,SPF_NONE, T_SCC_BODY_TEXT_LINE autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-nfs@vger.kernel.org On 28 Feb 2022, at 10:16, Trond Myklebust wrote: > On Mon, 2022-02-28 at 09:43 -0500, Benjamin Coddington wrote: >> On 27 Feb 2022, at 18:50, NeilBrown wrote: >>> I liked this patch at first, but I no longer think it is a good >>> idea. >>> >>> It is quite possible today for containers to provide sufficient >>> uniqueness simply by setting a unique hostname before the first NFS >>> mount. >>> Quite possibly some containers already do this, and are working >>> perfectly. >>> >>> If we add new randomness, the they will get a different identifier >>> on >>> each boot.  This is bad for exactly the same reason that it is bad >>> for >>> "net == &init_net". >>> >>> i.e.  I believe this patch could cause a regression for working >>> sites. >>> The regression may not be immediately obvious, but it may still be >>> there. >>> For this reason, I think this patch should be dropped. >> >> I agree, Trond please drop this patch. >> >> > Since it was already pushed to linux-next, it will have to be reverted. > I'm not seeing it on any branch on linux-next. I presume no one's pulled your linux-next branch. Are you not able to drop it from your linux-next branch? Ben