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=-2.1 required=3.0 tests=DKIM_INVALID,DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_PASS,USER_AGENT_MUTT 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 034E6C65BD0 for ; Sat, 6 Oct 2018 10:41:37 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id AFF882148C for ; Sat, 6 Oct 2018 10:41:36 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b="Ubcspm8q" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org AFF882148C Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=infradead.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-btrfs-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727813AbeJFRoV (ORCPT ); Sat, 6 Oct 2018 13:44:21 -0400 Received: from bombadil.infradead.org ([198.137.202.133]:33834 "EHLO bombadil.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726838AbeJFRoV (ORCPT ); Sat, 6 Oct 2018 13:44:21 -0400 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=bombadil.20170209; h=In-Reply-To:Content-Type:MIME-Version :References:Message-ID:Subject:Cc:To:From:Date:Sender:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Id: List-Help:List-Unsubscribe:List-Subscribe:List-Post:List-Owner:List-Archive; bh=VgAczyPVElIZf4Z4AYIxma9rBLPt7lRvQ+NbAMyAeG0=; b=Ubcspm8qkvnj6+KENEba2q++u o1xpDSTo0OprGY0ZLrbBQ1LW8mfX7XS4m1dDX5L5wkIGatpJY21WaS96soBTOYtZmiFW8vPu/eWCc s27zAl47os0cwwi96f10DiqdenvSdqd42Pwm+PzW5ToBvGtrBkeern0wWKkhk3m4IFvrUWK7JcMBP clI8XUePcDeTydwXgm3iOO+II30OPckMRabCr1GeCgJEXBeFWta921OBM5SYJTrAZ1s+ZlqPPNYg4 oXYNR6SlIpu7ElwJW5SIwVqbHAZfCFY5uTe8oGBHjI+Bu2IGjkrfbH2fjPWKU6OL2xtai9vaRKCp+ rUXTJ21Vg==; Received: from hch by bombadil.infradead.org with local (Exim 4.90_1 #2 (Red Hat Linux)) id 1g8k1e-0002jj-M6; Sat, 06 Oct 2018 10:41:34 +0000 Date: Sat, 6 Oct 2018 03:41:34 -0700 From: Christoph Hellwig To: "Darrick J. Wong" Cc: david@fromorbit.com, linux-xfs@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-btrfs@vger.kernel.org, ocfs2-devel@oss.oracle.com, sandeen@redhat.com Subject: Re: [PATCH 08/15] vfs: change clone and dedupe range function pointers to return bytes completed Message-ID: <20181006104134.GF25747@infradead.org> References: <153870027422.29072.7433543674436957232.stgit@magnolia> <153870033496.29072.3660384210745578982.stgit@magnolia> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <153870033496.29072.3660384210745578982.stgit@magnolia> User-Agent: Mutt/1.9.2 (2017-12-15) X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org. See http://www.infradead.org/rpr.html Sender: linux-btrfs-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-btrfs@vger.kernel.org On Thu, Oct 04, 2018 at 05:45:35PM -0700, Darrick J. Wong wrote: > From: Darrick J. Wong > > Change the clone_file_range and dedupe_file_range functions to return > the number of bytes they operated on. This is the precursor to allowing > fs implementations to return short clone/dedupe results to the user, > which will enable us to obey resource limits in a graceful manner. For clone this doesn't make any sense, as we don't allow 'short clones'.