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=-3.6 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS autolearn=no 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 AA686C433ED for ; Tue, 18 May 2021 13:56:39 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 8AB0A6117A for ; Tue, 18 May 2021 13:56:39 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S244164AbhERN54 (ORCPT ); Tue, 18 May 2021 09:57:56 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:47590 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S239681AbhERN54 (ORCPT ); Tue, 18 May 2021 09:57:56 -0400 Received: from mail-ua1-x936.google.com (mail-ua1-x936.google.com [IPv6:2607:f8b0:4864:20::936]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 061CBC061573 for ; Tue, 18 May 2021 06:56:38 -0700 (PDT) Received: by mail-ua1-x936.google.com with SMTP id f1so3236336uaj.10 for ; Tue, 18 May 2021 06:56:37 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=szeredi.hu; s=google; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=0218MIjV6sDk3GtBhJUUBoqbpznvnThNvXyXAl2dRdo=; b=cRL2w3zHWlxCUzo28Q5gSGrJRv38mw6NXXdLPG2CP2eZHhN5159XlXpc4TnJ74kX/1 kg8/NtknW1TWLEtB1XL9yfyrlnDrtBj3qRO4ARcBnSO+ZoHNNy6CUMo4J9451eOa3cY0 jSJ/yB9Ld6UNrUHjv7GP5lWg33y8WbC5pVsAc= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=0218MIjV6sDk3GtBhJUUBoqbpznvnThNvXyXAl2dRdo=; b=qCtn4lVpQLrYbdbbifXxAkNN+6315EWCtb+veaZ3ym9ebJFhwqdBrd54yn4hcTW25c b91ihFiTWcm0KajByNvVi8OGJa3EuTzQfpIwPW8JcTwDXcxBcjK/jTQ4jvG5+nAP7R5G PDBk5/bEpwqPR0d1yf2gzHFnLEtjy6mxxhAaJpS2GXSNI7nbIvpymwBuce7P+Nxq03el XgGFRtYx9pv+nCnnelmLWTFFHKK+7XiFulGyKGFO/HUHoIPYVE5axrQ6CIZAYYtY4MCt YxxU1laW5wTIdkfTWJjt9YIiGBJDFncJVZcsLCWyP8fYQpTAdMFJcls7jX5gEoQDBCVF cdxA== X-Gm-Message-State: AOAM533NyHcCc+EdR8ZV7IeLK/4u1lpFG1Y+mfV3VaI40wN20XZh0hBL n7dYOOkCtRk85kaZLtAklvCbGzVbES9pSoeAYGRpfXUohyg= X-Google-Smtp-Source: ABdhPJxte7giQP+HVI9f/B2gI531JC6jLeyS0GC1SRzloLPO6wRCAOAhyugLZlibpywStzpKhIzB6TLxKGXUlchCa8Y= X-Received: by 2002:ab0:2690:: with SMTP id t16mr6459810uao.9.1621346197241; Tue, 18 May 2021 06:56:37 -0700 (PDT) MIME-Version: 1.0 References: <20210512161848.3513818-1-rjones@redhat.com> <20210512161848.3513818-2-rjones@redhat.com> In-Reply-To: <20210512161848.3513818-2-rjones@redhat.com> From: Miklos Szeredi Date: Tue, 18 May 2021 15:56:25 +0200 Message-ID: Subject: Re: [PATCH v4] fuse: Allow fallocate(FALLOC_FL_ZERO_RANGE) To: "Richard W.M. Jones" Cc: linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, eblake@redhat.com, libguestfs@redhat.com, Shachar Sharon Content-Type: text/plain; charset="UTF-8" Precedence: bulk List-ID: X-Mailing-List: linux-fsdevel@vger.kernel.org On Wed, 12 May 2021 at 18:19, Richard W.M. Jones wrote: > > The current fuse module filters out fallocate(FALLOC_FL_ZERO_RANGE) > returning -EOPNOTSUPP. libnbd's nbdfuse would like to translate > FALLOC_FL_ZERO_RANGE requests into the NBD command > NBD_CMD_WRITE_ZEROES which allows NBD servers that support it to do > zeroing efficiently. > > This commit treats this flag exactly like FALLOC_FL_PUNCH_HOLE. Thanks, applied. Miklos