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[23.128.96.33]) by mx.google.com with ESMTPS id lc3-20020a17090b158300b002773d013d02si6774949pjb.140.2023.11.18.04.02.56 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 18 Nov 2023 04:03:06 -0800 (PST) Received-SPF: pass (google.com: domain of linux-nfs-owner@vger.kernel.org designates 23.128.96.33 as permitted sender) client-ip=23.128.96.33; Authentication-Results: mx.google.com; dkim=pass header.i=@kernel.org header.s=k20201202 header.b=PhFkLK0J; spf=pass (google.com: domain of linux-nfs-owner@vger.kernel.org designates 23.128.96.33 as permitted sender) smtp.mailfrom=linux-nfs-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=kernel.org Received: from out1.vger.email (depot.vger.email [IPv6:2620:137:e000::3:0]) by lipwig.vger.email (Postfix) with ESMTP id 2A6E380212D8; Sat, 18 Nov 2023 04:02:53 -0800 (PST) X-Virus-Status: Clean X-Virus-Scanned: clamav-milter 0.103.11 at lipwig.vger.email Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229842AbjKRMBR (ORCPT + 99 others); Sat, 18 Nov 2023 07:01:17 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:53946 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229510AbjKRMBQ (ORCPT ); Sat, 18 Nov 2023 07:01:16 -0500 Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 38E38E5 for ; Sat, 18 Nov 2023 04:01:13 -0800 (PST) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 80B83C433C8; Sat, 18 Nov 2023 12:01:12 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1700308872; bh=1zhhwa1ybC7HrDvnLpCpHLmoYrtPf+wR1N9qxMBbNzg=; h=Subject:From:To:Date:In-Reply-To:References:From; b=PhFkLK0JhllXIWlW7jkbF+p5y0TcmnaOX8Cyac2BTBbUOby+HYFAl7PfH/Ed79iH0 3QfRf06Xm2ErIGUBuxUc1jv/s5ouOpakPnywE/JkClpYFAc6UNc7V3fHknn/auuvgs Wl/sUoqmvBrVyZecVklG7MHjMUG00W3RXhMaiBsB0ohYrUk+OkuPuHo8efOUyPtIHf gNzlOcs0a+yaV2wV4GFadxqceVrwdxL2Lbla9EGQeMeWWJWwHExRZ+bhiA5ZJEqxug e2NrofNWpTDvQcyLc4Q4bci6da/yQw3xu5/nALdBMJEa0jGJpeHSUag9lUGC56sTO/ Z2T2iwOj4z4Vg== Message-ID: Subject: Re: NFSv4.1 --> NFSv4.2 client implementation? From: Jeff Layton To: Cedric Blancher , Linux NFS Mailing List Date: Sat, 18 Nov 2023 07:01:11 -0500 In-Reply-To: References: Autocrypt: addr=jlayton@kernel.org; prefer-encrypt=mutual; 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kZWuOsJdJQdmwlWC5L5ln9xgfr/4mOY38B0U= Content-Type: text/plain; charset="ISO-8859-15" Content-Transfer-Encoding: quoted-printable User-Agent: Evolution 3.50.1 (3.50.1-1.fc39) MIME-Version: 1.0 X-Spam-Status: No, score=-1.2 required=5.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS,T_SCC_BODY_TEXT_LINE autolearn=unavailable autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lipwig.vger.email Precedence: bulk List-ID: X-Mailing-List: linux-nfs@vger.kernel.org X-Greylist: Sender passed SPF test, not delayed by milter-greylist-4.6.4 (lipwig.vger.email [0.0.0.0]); Sat, 18 Nov 2023 04:02:53 -0800 (PST) On Sat, 2023-11-18 at 08:53 +0100, Cedric Blancher wrote: > Good morning! >=20 > What are the differences between NFSv4.1 and NFSv4.2 for a NFSv4 > client, if we ignore server-side copy and READ_PLUS support? > Can a NFSv4.1 client then identify itself als NFSv4.2 client? >=20 Yes. I believe that NFSv4.2 consists entirely of optional features over NFSv4.1, so it's legitimate for a client or server to advertise itself as a v4.2 capable, but support none of the features. --=20 Jeff Layton