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=-2.6 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,FAKE_REPLY_C,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,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 EC687C04AAF for ; Thu, 16 May 2019 18:58:02 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id C6A352082E for ; Thu, 16 May 2019 18:58:02 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="p0u9IeHa" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728024AbfEPS6C (ORCPT ); Thu, 16 May 2019 14:58:02 -0400 Received: from mail-wr1-f68.google.com ([209.85.221.68]:42309 "EHLO mail-wr1-f68.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727998AbfEPS57 (ORCPT ); Thu, 16 May 2019 14:57:59 -0400 Received: by mail-wr1-f68.google.com with SMTP id l2so4526513wrb.9; Thu, 16 May 2019 11:57:58 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=date:from:to:cc:subject:message-id:mime-version:content-disposition :user-agent; bh=4Mod0w+FblAyMcQEjnQi2LEp2GvI/rgCxO2rN911/JQ=; b=p0u9IeHaeL0IXuaE2OqW0lMXODaKkgs4K4WIJeoZq5PwlAkEW8iYzmS+IGQJJdCLrB Ogtl4LZYRKZifbaedBOZG+NoPgPuyndNkxOgNVWrCkQQQ3NdttqAW3CQlS4z1krFyKPU HQRSShHBtvYrmd7aGBDq1Phw3vEk4jBEWwTsBUfpH4KrZX0LGTOH4GiMT37p3smtiCZC EBSLYXOL35i0Nqv1veRvkze3B9z9HM5OWXFQnlaEvFS2fBpqYeES26jiW85PfIIVLftj /fumhtoC016Ox4D5ynOnogCLC3BWdCRR+Bj5XKrmcFmVKKacUjgEuo5BjUuRrLsXhYFV 5XMA== 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:mime-version :content-disposition:user-agent; bh=4Mod0w+FblAyMcQEjnQi2LEp2GvI/rgCxO2rN911/JQ=; b=JoiPjXkb9KiODCsrez15uio3T4MPtIw9+ewDIV1RUSi1KIj8938LMyC+Nd9KjLLX1N 1D//sh+HvQHext2WXQgnicgGp450XW4RCMeF7N1KgJNZzQxWaAc3r9QcfajYR+dmEvq2 G2Pda2gy5czBdlv/Jc98ibyKAnOqX2HrunKWBpEsC/9KFRYoDPw8EWbxxGPqywlO18f/ 2SYySnOrlUKfBgbTmqkXBCmwL64Ioq5ASUHoA+bUZdhSpA+gqEezNwC1Dt45uqIbDrn/ 1CaoKk/jPu08fpeTmk057ZwVRiFNfHzPSZMBieENxmV+DEYhnjaQcjLP5efdHOTZxkqU isMA== X-Gm-Message-State: APjAAAUrlOJuDYp4g9nOtPaYl08EPf00ZxwSKbTb4AesSbOe1a4scEFv +Endmwj+ULm4ruSHpHKH8g== X-Google-Smtp-Source: APXvYqxuNzzHHmXNKHk5zRo9ksI0vdF5MVWpEvA/CeD1EWGNHKQxPIroglRzqbwei99YOQVgE7edPQ== X-Received: by 2002:adf:b6a5:: with SMTP id j37mr27592391wre.4.1558033078012; Thu, 16 May 2019 11:57:58 -0700 (PDT) Received: from avx2 ([46.53.251.158]) by smtp.gmail.com with ESMTPSA id a5sm5334361wrt.10.2019.05.16.11.57.56 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Thu, 16 May 2019 11:57:57 -0700 (PDT) Date: Thu, 16 May 2019 21:57:54 +0300 From: Alexey Dobriyan To: viro@zeniv.linux.org.uk Cc: linux-kernel@vger.kernel.org, linux-abi@vger.kernel.org, christian@brauner.io, dhowells@redhat.com Subject: Re: [PATCH 0/4] uapi, vfs: Change the mount API UAPI [ver #2] Message-ID: <20190516185754.GA23402@avx2> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline User-Agent: Mutt/1.10.1 (2018-07-13) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org > unshare(CLONE_FILES); > /* we don't want anything past stderr here */ > close_range(3, ~0U); > execve(....); Yes please. nextfd(2) https://lkml.org/lkml/2012/4/1/71 fdmap(2) https://marc.info/?t=150628366900006&r=1&w=4 I like fdmap more.