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[23.128.96.18]) by mx.google.com with ESMTP id c26si12262940eds.33.2020.04.15.15.48.57; Wed, 15 Apr 2020 15:49:31 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-nfs-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18; Authentication-Results: mx.google.com; dkim=pass header.i=@desy.de header.s=default header.b=ywWnH99X; spf=pass (google.com: domain of linux-nfs-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-nfs-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2895710AbgDOJjX (ORCPT + 99 others); Wed, 15 Apr 2020 05:39:23 -0400 Received: from smtp-o-2.desy.de ([131.169.56.155]:48188 "EHLO smtp-o-2.desy.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2895690AbgDOJjV (ORCPT ); Wed, 15 Apr 2020 05:39:21 -0400 Received: from smtp-buf-2.desy.de (smtp-buf-2.desy.de [IPv6:2001:638:700:1038::1:a5]) by smtp-o-2.desy.de (Postfix) with ESMTP id D4283160778 for ; Wed, 15 Apr 2020 11:39:16 +0200 (CEST) DKIM-Filter: OpenDKIM Filter v2.11.0 smtp-o-2.desy.de D4283160778 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=desy.de; s=default; t=1586943556; bh=xrURf8aMpSJGTGLubuCcf69I263xbUFCf/wrrboNeNE=; h=Date:From:To:Subject:From; b=ywWnH99Xp3RIZ7EFjgwzRhwcGLZD6IaklrTBQKbciOmZa4SW/b9yzz9YhmHY9F7dy Ur9aN5f7HzIvdptLSvfFAFCAQl8zat22e80eZZgWJIfWnMHQlmuJLrUEIdKrC5CZWq ll5dQrR8/vNHIeKq3Wx3f7Ti59CGJpL/U3SHck1c= Received: from smtp-m-2.desy.de (smtp-m-2.desy.de [IPv6:2001:638:700:1038::1:82]) by smtp-buf-2.desy.de (Postfix) with ESMTP id D039E1A0101 for ; Wed, 15 Apr 2020 11:39:16 +0200 (CEST) X-Virus-Scanned: amavisd-new at desy.de Received: from z-mbx-2.desy.de (z-mbx-2.desy.de [131.169.55.140]) by smtp-intra-1.desy.de (Postfix) with ESMTP id A93A4C008A for ; Wed, 15 Apr 2020 11:39:16 +0200 (CEST) Date: Wed, 15 Apr 2020 11:39:16 +0200 (CEST) From: "Mkrtchyan, Tigran" To: linux-nfs Message-ID: <563971101.12407489.1586943556660.JavaMail.zimbra@desy.de> Subject: multiple EXCHANGE_ID diring a mount. MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable X-Mailer: Zimbra 8.8.15_GA_3901 (ZimbraWebClient - FF75 (Linux)/8.8.15_GA_3895) Thread-Index: noP7bN9i69FFVyqBi2IgCdXjpu5SMA== Thread-Topic: multiple EXCHANGE_ID diring a mount. Sender: linux-nfs-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-nfs@vger.kernel.org Dear NFS (client) developers, Today I notice, that during mount nfs client sends two EXCHANGE_ID operati= ons: 4 0.000380551 131.169.185.213 =E2=86=92 131.169.191.144 NFS V4 NULL Cal= l 6 0.001052087 131.169.191.144 =E2=86=92 131.169.185.213 NFS V4 NULL Rep= ly (Call In 4) 8 0.001501687 131.169.185.213 =E2=86=92 131.169.191.144 NFS V4 Call EXC= HANGE_ID 9 0.002105356 131.169.191.144 =E2=86=92 131.169.185.213 NFS V4 Reply (C= all In 8) EXCHANGE_ID 11 0.002489297 131.169.185.213 =E2=86=92 131.169.191.144 NFS V4 Call EXC= HANGE_ID <----------------------------------- A second one 12 0.003422630 131.169.191.144 =E2=86=92 131.169.185.213 NFS V4 Reply (C= all In 11) EXCHANGE_ID 14 0.003569542 131.169.185.213 =E2=86=92 131.169.191.144 NFS V4 Call CRE= ATE_SESSION 17 0.004701642 131.169.191.144 =E2=86=92 131.169.185.213 NFS V4 Reply (C= all In 14) CREATE_SESSION 18 0.004822235 131.169.185.213 =E2=86=92 131.169.191.144 NFS V4 Call REC= LAIM_COMPLETE 19 0.005317324 131.169.191.144 =E2=86=92 131.169.185.213 NFS V4 Reply (C= all In 18) RECLAIM_COMPLETE 20 0.005489908 131.169.185.213 =E2=86=92 131.169.191.144 NFS V4 Call SEC= INFO_NO_NAME 21 0.006648815 131.169.191.144 =E2=86=92 131.169.185.213 NFS V4 Reply (C= all In 20) SECINFO_NO_NAME I observe this with kernel 5.6 and 5.5. On opposite, the older kernels, lik= e in RHEL7 don't do this Older kernel (3.10.0-1062.12.1.el7.x86_64) $ tshark -r ex_id_el7.pcap -Y nfs 8 0.006731652 131.169.240.106 -> 131.169.240.145 NFS 336 V4 Call EXCHANGE= _ID 9 0.008812988 131.169.240.145 -> 131.169.240.106 NFS 224 V4 Reply (Call I= n 8) EXCHANGE_ID 10 0.009127689 131.169.240.106 -> 131.169.240.145 NFS 292 V4 Call CREATE_S= ESSION 13 0.012583411 131.169.240.145 -> 131.169.240.106 NFS 196 V4 Reply (Call I= n 10) CREATE_SESSION 14 0.012805867 131.169.240.106 -> 131.169.240.145 NFS 208 V4 Call RECLAIM_= COMPLETE 15 0.013716790 131.169.240.145 -> 131.169.240.106 NFS 160 V4 Reply (Call I= n 14) RECLAIM_COMPLETE 16 0.013981538 131.169.240.106 -> 131.169.240.145 NFS 216 V4 Call SECINFO_= NO_NAME 17 0.019359329 131.169.240.145 -> 131.169.240.106 NFS 176 V4 Reply (Call I= n 16) SECINFO_NO_NAME This is of course not a big problem, but can point to an unintended change = or error. The capture file available at: https://sas.desy.de/index.php/s/3sRA9WD5BEpZH7z Regards, Tigran.