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 mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 3A80BC433EF for ; Fri, 29 Oct 2021 15:16:49 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 19D7861165 for ; Fri, 29 Oct 2021 15:16:49 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229610AbhJ2PTR (ORCPT ); Fri, 29 Oct 2021 11:19:17 -0400 Received: from mout.gmx.net ([212.227.15.19]:57509 "EHLO mout.gmx.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229527AbhJ2PTQ (ORCPT ); Fri, 29 Oct 2021 11:19:16 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=gmx.net; s=badeba3b8450; t=1635520606; bh=J2VEsNhC4V/NyE9M4ez//6e3kjcM6JxeE/FpC6QjRs0=; h=X-UI-Sender-Class:Date:Subject:To:Cc:References:From:In-Reply-To; b=TyR03GA1gLsHzYw3PXQuGkeRpppdf1rdeNRyILZw0jLw4KwQ/MopYIC1Q06688RSQ 2sNgn9250EBAzT9OZEttX3iXukTRmy3mM3UIlWNcAY0X1JK2jBsfBM7XFdH+/Zkvsc /9MgPd2m+rqKQ54Im1GOnwRpqn8QQp8kPiJva1C0= X-UI-Sender-Class: 01bb95c1-4bf8-414a-932a-4f6e2808ef9c Received: from [10.54.0.166] ([87.167.93.4]) by mail.gmx.net (mrgmx005 [212.227.17.190]) with ESMTPSA (Nemesis) id 1MNt0M-1mIL1Z3uIq-00OCUK; Fri, 29 Oct 2021 17:16:45 +0200 Message-ID: <24940d86-e279-8586-7be7-52dab9215ead@gmx.net> Date: Fri, 29 Oct 2021 17:16:45 +0200 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:91.0) Gecko/20100101 Thunderbird/91.1.0 Subject: Re: overlayfs: supporting O_TMPFILE Content-Language: en-US To: Miklos Szeredi , Amir Goldstein Cc: overlayfs References: <951c68ed-3f0e-8d9b-6c10-690df778ecc2@gmx.net> From: =?UTF-8?Q?Georg_M=c3=bcller?= In-Reply-To: Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: quoted-printable X-Provags-ID: V03:K1:SOn5saGGbbRUg6OGcBfheSyr2YSjfoGiCpfG0GlU7msz9k0fN9Q FWmiVk+UuBs5WQsmwxxlOY31fY0bu/hoNdD0owd0yROh6Y3Onp+72VZEFQb53wnWFV4gyO+ v9Xbi2BCY4gdQuIezsCdIQu8HMqpXOy0vKeHT+nH6ApQtvT+NCdtVLqLeaUEu6lnszl1edi e76bWQvhAxnOwNDdxhLGw== X-UI-Out-Filterresults: notjunk:1;V03:K0:aZtoD2qwMeo=:gJdJDayFfrVLG2F5Lg+oyT 2yrWccjQp+fKY+Oewh5dYDzNjmcgw31ZhFjdgrLXA8/ccXojUSd6DmrmF67wBeHWnGj7cn4Lm nIcWnwqzbHgeEgS2p7AVGqKqGorm1CAMA2jQyN+xBATDg+1NaESyWxLDA8pjcR/VIfHhMMdm2 UIjKxvTmC7AGcu9041NUv6vFSfcpgLNEEROCoSCZA1FFjjNAJQ7iW/xO5gxwIcJu86f2VPvGx ufA8yPGwd0AUXflmg7O+eZ5KRXhAzrmga32llXqONyssbEOwt0cp5jeOU7glZJepRUY0dvva0 c9H1Rrqjl6P6PWTnMKngXD0ImdSC/OdvHr0FCzGdkjmo5VKJeftn7eq2ITiQ/kMktIcLrWXk1 SID/uZ3cWTuGGjjKhjieNv7BxdRtuATd5KUomKBAKsKVfdL/X/LU7J8lBX/ClzUwriCYFuRHI /aod/pueiiwZae9/A3kUL8eMvNPqOOQA7T6ksuMLtsbRRytWMU/cOlaUr299zLeaICh/HgJax BA/LWBd4UUFy/dmuARvT34/BbkSutxVaYzaJ3Lk12KlplYfqkDhDNef+MeCNcSBe4dCPZ16T3 A3j6Hwvf+NOg/QbLnu55JUO0cw9e9vB8NLFJw2PCLnqld9Vsb4oBtBdPojdvvVxubbnOAqsuF 0cvaDaHw4SAHo9n6oTEKKLKidX1Ik/b2LAI5XrsKjsPScoRz8CLraeJNMdhy/wIGroKoLWblm wLV0KsoGUl6QFD5t4ROwrqMeOJ3Isbv8oxqwT6uW0cMrsSSf/GEGjCE6W5GWmU9yB58e6nye9 rHXFZ4mNXs/kkwTMzvFdrS4uG1CYciy+Kr2Zo1/8Fzf8dmeSbzqB3vbOJhxLQ6Eqc7PzSRo6H tAYxjYghwHHZ0h2p7quIF6unb9SPl5aFYvcGmqKp4LfyxSp7SpVmC+r7UP1ui97pzGeI3nKIo yWBG0pnFzDIzsJL+KgXyUk0jbMzKNhQPguHkjWXPGXbPAtC2KCNaU/al7+8JZNYMKCeOBM8LJ a4zpT6HpP2lUa95KFMmXGJag/a93W0QXUKflWyAPVdW5yNFRqsW31+OgS5H4jnToIFkfmZ/j+ KDdZdI4wveC93g= Precedence: bulk List-ID: X-Mailing-List: linux-unionfs@vger.kernel.org Am 29.10.21 um 14:54 schrieb Miklos Szeredi: > Here's something I prepared earlier;) > > Don't know why it got stuck, quite possibly I realized some fatal flaw t= hat I > can't remember anymore... > > Seems to work though, so getting this out for review and testing. The code looks good to me. I have a small test program which writes 100MB to a tmpfile and then check= s its contents: https://github.com/georgmu/overlaytest I have tested manual overlayfs creation (make overlaytest) and docker (mak= e dockertest). For docker: `docker info | grep "Storage Driver"` should be "overlay2". I may enhance the test to create multiple tmpfiles in parallel. Thank you very much for the code. I would add my tested-by. Best regards, Georg