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 X-Spam-Level: X-Spam-Status: No, score=-12.2 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, MENTIONS_GIT_HOSTING,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_SANE_1 autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 84945C433ED for ; Fri, 23 Apr 2021 18:13:47 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 44FA76121D for ; Fri, 23 Apr 2021 18:13:47 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231400AbhDWSOX (ORCPT ); Fri, 23 Apr 2021 14:14:23 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:35700 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229549AbhDWSOW (ORCPT ); Fri, 23 Apr 2021 14:14:22 -0400 Received: from fieldses.org (fieldses.org [IPv6:2600:3c00:e000:2f7::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 0552DC061574 for ; Fri, 23 Apr 2021 11:13:45 -0700 (PDT) Received: by fieldses.org (Postfix, from userid 2815) id 6FC5072B6; Fri, 23 Apr 2021 14:13:45 -0400 (EDT) DKIM-Filter: OpenDKIM Filter v2.11.0 fieldses.org 6FC5072B6 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=fieldses.org; s=default; t=1619201625; bh=VDGScNMt8YSsBjppsorWazd/XLOqA14J/qrZcgK7jY0=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=HYBD6LDMK0lkICFC5weCMWQFGTrJlPLtFIQzu1vnYDxaT+hA+mmQn7fL+IqoymPst rKjK7yfW0xHikyK2HdJpmE/QeJ6dyfP+XFjHhVG15StOhS2HEsrYXQLHUg9g8YXUqR JWu/2EjQqAI2B1FdS4gV6IUNTmE+bGhvOhZ5WbOs= Date: Fri, 23 Apr 2021 14:13:45 -0400 From: "J . Bruce Fields" To: Petr Vorel Cc: linux-nfs@vger.kernel.org, Steve Dickson , NeilBrown , Chuck Lever , Alexey Kodanev Subject: Re: [RFC PATCH 1/1] mount.nfs: Fix mounting on tmpfs Message-ID: <20210423181345.GE10457@fieldses.org> References: <20210422191803.31511-1-pvorel@suse.cz> <20210422202334.GB25415@fieldses.org> <20210423142329.GB10457@fieldses.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.5.21 (2010-09-15) Precedence: bulk List-ID: X-Mailing-List: linux-nfs@vger.kernel.org On Fri, Apr 23, 2021 at 07:04:41PM +0200, Petr Vorel wrote: > Hi Bruce, > > > On Fri, Apr 23, 2021 at 04:17:52AM +0200, Petr Vorel wrote: > > > Hi, > > > > > On Thu, Apr 22, 2021 at 09:18:03PM +0200, Petr Vorel wrote: > > > > > LTP NFS tests (which use netns) fails on tmpfs since d4066486: > > > > > > mount -t nfs -o proto=tcp,vers=4.2 10.0.0.2:/tmp/ltp.nfs01.nfs-4.2/LTP_nfs01.UF6gRZCy3O/4.2/tcp /tmp/ltp.nfs01.nfs-4.2/LTP_nfs01.UF6gRZCy3O/4.2/0 > > > > > mount.nfs: mounting 10.0.0.2:/tmp/ltp.nfs01.nfs-4.2/LTP_nfs01.UF6gRZCy3O/4.2/tcp failed, reason given by server: No such file or directory > > > > > We should figure out the reason for the failure. A network trace might > > > > help. > > > > Anything specific you're looking for? > > > Actually I was thinking of capturing the network traffic, something > > like: > > tcpdump -s0 -wtmp.pcap -i > > > then try the mount, then kill tcpdump and look at tmp.pcap. > > I don't see anything suspicious, can you please have a look? > https://gitlab.com/pevik/tmp/-/raw/master/nfs.v3.pcap > https://gitlab.com/pevik/tmp/-/raw/master/nfs.v4.pcap > https://gitlab.com/pevik/tmp/-/raw/master/nfs.v4.1.pcap > https://gitlab.com/pevik/tmp/-/raw/master/nfs.v4.2.pcap It might be the "hide" option, that's odd: > exportfs -v > /tmp/LTP_nfs01.xkKpqpRikV/4.2/tcp > (sync,wdelay,hide,no_subtree_check,fsid=7239,sec=sys,rw,secure,no_root_squash,no_all_squash) --b.