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=-5.8 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING, SPF_HELO_NONE,SPF_PASS autolearn=unavailable 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 A92F3C33CB1 for ; Fri, 17 Jan 2020 16:22:09 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 7C4B220684 for ; Fri, 17 Jan 2020 16:22:09 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=osandov-com.20150623.gappssmtp.com header.i=@osandov-com.20150623.gappssmtp.com header.b="DZers6f/" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729203AbgAQQWE (ORCPT ); Fri, 17 Jan 2020 11:22:04 -0500 Received: from mail-pg1-f195.google.com ([209.85.215.195]:45700 "EHLO mail-pg1-f195.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729148AbgAQQWE (ORCPT ); Fri, 17 Jan 2020 11:22:04 -0500 Received: by mail-pg1-f195.google.com with SMTP id b9so11880813pgk.12 for ; Fri, 17 Jan 2020 08:22:03 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=osandov-com.20150623.gappssmtp.com; s=20150623; h=date:from:to:cc:subject:message-id:references:mime-version :content-disposition:in-reply-to; bh=B/QRDv8e8iQEqDNCGkiiDK4fWPlSZEWb6aUg/XWFLNs=; b=DZers6f/bW85HgG9w6xwZ2W7ctE6cirUkp9BOXc4wzAQLJ8hbclatauI3Jbj0CHoK3 raCk5YguGXY7ntXQRwWygDUTHFX/ZCxFHtLg4MqKOtAOzrmkgYDKukHBZdsdmmARTe9Z fnLvAzVpSyJ56zmYkFOTG/DAmSwYrs/z+jBQ1/D2HMxFlX1/xxY0ZLvqOLtGkZa+yjv2 JKxSQ/w95eNIT6dgTUPizuLLgOKUIoJJnsLDEbahCyq0yKkwKH2o00mJJYXQ+FJr72DS G9izbKZMiUcKxaJ7+RA2zelE0AAv5k9TLUCWR8l0KG815UdhT9gTDuB7xezO08fHmJwl YLLg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:from:to:cc:subject:message-id:references :mime-version:content-disposition:in-reply-to; bh=B/QRDv8e8iQEqDNCGkiiDK4fWPlSZEWb6aUg/XWFLNs=; b=tZ072OZasdYreM0HHA1AEjMm08XHFiVZa+aqnSPx7cdNPSewF5kIBxVuaE9XOTRbEW myQOtlqo+99p0BmpJwIFCiPaCzAfBsohZ3FBr2QmVqLLtsThRg4FGnEDaDj1sfHbVA2i XEuco6+Pj/BcDZ+W6f3kf26xQzKrrOyHz9t1Pj/WfTFdQVASi2Y+XGv6hJyfmEOhPmv1 whYVStGJWMQm6dbS2GBJP32wCtEDbnABLR47lCFGLeISYiPk8ljEJ/iL/gQ/3jNhlDZX uoNIuc5qT3uRhohsVyNt4E4eUSknxFL+HOC/SmmsqHxdPfUEz8o7RGuNvZxFkVArhx6A 5+Uw== X-Gm-Message-State: APjAAAVkMcH/NldXDwoRBPZNe+i/UBz8kHPzO4uivHsKdkLo7IMpPZ0p nKzPs1Bucu8cBglBfCJnm7F9NQ== X-Google-Smtp-Source: APXvYqwcs87BORO66K1Fb2Q4UZMx1Tbzz2nRXGK4re5uWiRJWWTgWw8OWfntW6QesxVSMp+PIgbbIQ== X-Received: by 2002:a63:d00f:: with SMTP id z15mr45867227pgf.143.1579278123365; Fri, 17 Jan 2020 08:22:03 -0800 (PST) Received: from vader ([2601:602:8b80:8e0:e6a7:a0ff:fe0b:c9a8]) by smtp.gmail.com with ESMTPSA id b128sm28618425pga.43.2020.01.17.08.22.02 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 17 Jan 2020 08:22:02 -0800 (PST) Date: Fri, 17 Jan 2020 08:22:01 -0800 From: Omar Sandoval To: David Howells Cc: Colin Walters , Al Viro , linux-fsdevel@vger.kernel.org, Christoph Hellwig , Theodore Ts'o , adilger.kernel@dilger.ca, "Darrick J. Wong" , Chris Mason , josef@toxicpanda.com, dsterba@suse.com, linux-ext4 , xfs , linux-btrfs@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: Making linkat() able to overwrite the target Message-ID: <20200117162201.GA282012@vader> References: <2397bb4a-2ca2-4b44-8c79-64efba9aa04d@www.fastmail.com> <20200114170250.GA8904@ZenIV.linux.org.uk> <3326.1579019665@warthog.procyon.org.uk> <9351.1579025170@warthog.procyon.org.uk> <359591.1579261375@warthog.procyon.org.uk> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <359591.1579261375@warthog.procyon.org.uk> Sender: linux-ext4-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-ext4@vger.kernel.org On Fri, Jan 17, 2020 at 11:42:55AM +0000, David Howells wrote: > Hi Omar, > > Do you still have your AT_REPLACE patches? You said that you'd post a v4 > series, though I don't see it. I could make use of such a feature in > cachefiles inside the kernel. For my original question, see: > > https://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs.git/log/?h=fscache-iter > > And do you have ext4 support for it? Hi, Yes I still have those patches lying around and I'd be happy to dust them off and resend them. I don't have ext4 support. I'd be willing to take a stab at ext4 once Al is happy with the VFS part unless someone more familiar with ext4 wants to contribute that support. Thanks for reviving interesting in this!