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=-11.6 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,NICE_REPLY_A, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,USER_AGENT_SANE_1 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 C2B20C433E0 for ; Thu, 16 Jul 2020 20:18:33 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 8FBD72076A for ; Thu, 16 Jul 2020 20:18:33 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="gPyJXh21" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729010AbgGPUSd (ORCPT ); Thu, 16 Jul 2020 16:18:33 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:45254 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728788AbgGPUSc (ORCPT ); Thu, 16 Jul 2020 16:18:32 -0400 Received: from mail-wm1-x341.google.com (mail-wm1-x341.google.com [IPv6:2a00:1450:4864:20::341]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 1A653C061755; Thu, 16 Jul 2020 13:18:32 -0700 (PDT) Received: by mail-wm1-x341.google.com with SMTP id o8so11479216wmh.4; Thu, 16 Jul 2020 13:18:31 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=subject:to:cc:references:from:autocrypt:message-id:date:user-agent :mime-version:in-reply-to:content-language:content-transfer-encoding; bh=hT1ysO8UtcshQI1jXyBj8JCzEF++nOcaQlKMyGdyebI=; b=gPyJXh21xqwg6wi5lQgsCnsHNHIw9zktYFEeZM4/dwWJwAfEuNc0aXHghzkPptrEiu cAh9PlzMYLW0zPNTVC+VV8PCDQUjKDgyhyjllp/rVI5iLFzOi7t7aWFaFO8xCxODZEkU u8/Y+QJ5lc/6Ty/GTE/GXgFOZ/loWYpedar5hfUCbuagq5kvlrFQxbjpLbLzd4Zeyhw4 R81cod5MZcfun9atECCis6ywDNt9vo6LS0fiJx8oiusJNMeNe7us4GOjM5yrg9NPkNpl k/KDljEdwh3CfUFlMWz+dMFc4sdS7diIT8HcyIyDelxqrIAODpPXuPuzOI7w8a1Q9Xdz YJPA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:subject:to:cc:references:from:autocrypt :message-id:date:user-agent:mime-version:in-reply-to :content-language:content-transfer-encoding; bh=hT1ysO8UtcshQI1jXyBj8JCzEF++nOcaQlKMyGdyebI=; b=pTajQw3UbO56Wk5by9fQIIigUYtbc6TWmOO0s6DLBfh+QzyctO/78qsEZC/8DdUA7M KmnOvzngfMNZM2gX2V/A3sBUY1L3MPyyLI1MzvyQN/1q/HqvTG41ULV1pA2vFsnyiFRq 9Y3wVnntOowTIjO2Fn+DMf/0ND5A7zvTCSsihmEIZs261KrnUscIhX3BY/86u7cPy8tB bkLdduwodFoKe2ychd9jIeoEXIOkm9m5cxbUvVaa1/wm5KxHnzElOoUBfL/9DZ4c4+JX rmTFl6kDRP4zT0qyE9t0CDfbj/d7z15NLmVpv72xEYoblBdlSgo9kqtY5D+yBd0+ueEX vO6g== X-Gm-Message-State: AOAM530FmgkopV3Byn1dbNBz/uM8QpvMUkBQ51WJ8BbNbS7Z4ZljMYMH hdIb74TaqesI3SRl2SZ//grlDqSn6w8= X-Google-Smtp-Source: ABdhPJw8nV+8IAqaXqIGkoX8kBdfOHm2J50mIVqOpgcP41uZ6JJSTEB1svlXncB9MoytaJ+z1MBJWw== X-Received: by 2002:a7b:cc92:: with SMTP id p18mr6057089wma.4.1594930710261; Thu, 16 Jul 2020 13:18:30 -0700 (PDT) Received: from [192.168.43.238] ([5.100.193.69]) by smtp.gmail.com with ESMTPSA id k18sm10805024wrx.34.2020.07.16.13.18.27 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Thu, 16 Jul 2020 13:18:29 -0700 (PDT) Subject: Re: [PATCH RFC v2 1/3] io_uring: use an enumeration for io_uring_register(2) opcodes To: Stefano Garzarella , Jens Axboe Cc: Alexander Viro , Kernel Hardening , Kees Cook , Aleksa Sarai , Stefan Hajnoczi , Christian Brauner , Sargun Dhillon , Jann Horn , io-uring@vger.kernel.org, linux-fsdevel@vger.kernel.org, Jeff Moyer , linux-kernel@vger.kernel.org References: <20200716124833.93667-1-sgarzare@redhat.com> <20200716124833.93667-2-sgarzare@redhat.com> From: Pavel Begunkov Autocrypt: addr=asml.silence@gmail.com; prefer-encrypt=mutual; keydata= mQINBFmKBOQBEAC76ZFxLAKpDw0bKQ8CEiYJRGn8MHTUhURL02/7n1t0HkKQx2K1fCXClbps bdwSHrhOWdW61pmfMbDYbTj6ZvGRvhoLWfGkzujB2wjNcbNTXIoOzJEGISHaPf6E2IQx1ik9 6uqVkK1OMb7qRvKH0i7HYP4WJzYbEWVyLiAxUj611mC9tgd73oqZ2pLYzGTqF2j6a/obaqha +hXuWTvpDQXqcOZJXIW43atprH03G1tQs7VwR21Q1eq6Yvy2ESLdc38EqCszBfQRMmKy+cfp W3U9Mb1w0L680pXrONcnlDBCN7/sghGeMHjGKfNANjPc+0hzz3rApPxpoE7HC1uRiwC4et83 CKnncH1l7zgeBT9Oa3qEiBlaa1ZCBqrA4dY+z5fWJYjMpwI1SNp37RtF8fKXbKQg+JuUjAa9 Y6oXeyEvDHMyJYMcinl6xCqCBAXPHnHmawkMMgjr3BBRzODmMr+CPVvnYe7BFYfoajzqzq+h EyXSl3aBf0IDPTqSUrhbmjj5OEOYgRW5p+mdYtY1cXeK8copmd+fd/eTkghok5li58AojCba jRjp7zVOLOjDlpxxiKhuFmpV4yWNh5JJaTbwCRSd04sCcDNlJj+TehTr+o1QiORzc2t+N5iJ NbILft19Izdn8U39T5oWiynqa1qCLgbuFtnYx1HlUq/HvAm+kwARAQABtDFQYXZlbCBCZWd1 bmtvdiAoc2lsZW5jZSkgPGFzbWwuc2lsZW5jZUBnbWFpbC5jb20+iQJOBBMBCAA4FiEE+6Ju PTjTbx479o3OWt5b1Glr+6UFAlmKBOQCGwMFCwkIBwIGFQgJCgsCBBYCAwECHgECF4AACgkQ Wt5b1Glr+6WxZA//QueaKHzgdnOikJ7NA/Vq8FmhRlwgtP0+E+w93kL+ZGLzS/cUCIjn2f4Q Mcutj2Neg0CcYPX3b2nJiKr5Vn0rjJ/suiaOa1h1KzyNTOmxnsqE5fmxOf6C6x+NKE18I5Jy xzLQoktbdDVA7JfB1itt6iWSNoOTVcvFyvfe5ggy6FSCcP+m1RlR58XxVLH+qlAvxxOeEr/e aQfUzrs7gqdSd9zQGEZo0jtuBiB7k98t9y0oC9Jz0PJdvaj1NZUgtXG9pEtww3LdeXP/TkFl HBSxVflzeoFaj4UAuy8+uve7ya/ECNCc8kk0VYaEjoVrzJcYdKP583iRhOLlZA6HEmn/+Gh9 4orG67HNiJlbFiW3whxGizWsrtFNLsSP1YrEReYk9j1SoUHHzsu+ZtNfKuHIhK0sU07G1OPN 2rDLlzUWR9Jc22INAkhVHOogOcc5ajMGhgWcBJMLCoi219HlX69LIDu3Y34uIg9QPZIC2jwr 24W0kxmK6avJr7+n4o8m6sOJvhlumSp5TSNhRiKvAHB1I2JB8Q1yZCIPzx+w1ALxuoWiCdwV M/azguU42R17IuBzK0S3hPjXpEi2sK/k4pEPnHVUv9Cu09HCNnd6BRfFGjo8M9kZvw360gC1 reeMdqGjwQ68o9x0R7NBRrtUOh48TDLXCANAg97wjPoy37dQE7e5Ag0EWYoE5AEQAMWS+aBV IJtCjwtfCOV98NamFpDEjBMrCAfLm7wZlmXy5I6o7nzzCxEw06P2rhzp1hIqkaab1kHySU7g dkpjmQ7Jjlrf6KdMP87mC/Hx4+zgVCkTQCKkIxNE76Ff3O9uTvkWCspSh9J0qPYyCaVta2D1 Sq5HZ8WFcap71iVO1f2/FEHKJNz/YTSOS/W7dxJdXl2eoj3gYX2UZNfoaVv8OXKaWslZlgqN jSg9wsTv1K73AnQKt4fFhscN9YFxhtgD/SQuOldE5Ws4UlJoaFX/yCoJL3ky2kC0WFngzwRF Yo6u/KON/o28yyP+alYRMBrN0Dm60FuVSIFafSqXoJTIjSZ6olbEoT0u17Rag8BxnxryMrgR dkccq272MaSS0eOC9K2rtvxzddohRFPcy/8bkX+t2iukTDz75KSTKO+chce62Xxdg62dpkZX xK+HeDCZ7gRNZvAbDETr6XI63hPKi891GeZqvqQVYR8e+V2725w+H1iv3THiB1tx4L2bXZDI DtMKQ5D2RvCHNdPNcZeldEoJwKoA60yg6tuUquvsLvfCwtrmVI2rL2djYxRfGNmFMrUDN1Xq F3xozA91q3iZd9OYi9G+M/OA01husBdcIzj1hu0aL+MGg4Gqk6XwjoSxVd4YT41kTU7Kk+/I 5/Nf+i88ULt6HanBYcY/+Daeo/XFABEBAAGJAjYEGAEIACAWIQT7om49ONNvHjv2jc5a3lvU aWv7pQUCWYoE5AIbDAAKCRBa3lvUaWv7pfmcEACKTRQ28b1y5ztKuLdLr79+T+LwZKHjX++P 4wKjEOECCcB6KCv3hP+J2GCXDOPZvdg/ZYZafqP68Yy8AZqkfa4qPYHmIdpODtRzZSL48kM8 LRzV8Rl7J3ItvzdBRxf4T/Zseu5U6ELiQdCUkPGsJcPIJkgPjO2ROG/ZtYa9DvnShNWPlp+R uPwPccEQPWO/NP4fJl2zwC6byjljZhW5kxYswGMLBwb5cDUZAisIukyAa8Xshdan6C2RZcNs rB3L7vsg/R8UCehxOH0C+NypG2GqjVejNZsc7bgV49EOVltS+GmGyY+moIzxsuLmT93rqyII 5rSbbcTLe6KBYcs24XEoo49Zm9oDA3jYvNpeYD8rDcnNbuZh9kTgBwFN41JHOPv0W2FEEWqe JsCwQdcOQ56rtezdCJUYmRAt3BsfjN3Jn3N6rpodi4Dkdli8HylM5iq4ooeb5VkQ7UZxbCWt UVMKkOCdFhutRmYp0mbv2e87IK4erwNHQRkHUkzbsuym8RVpAZbLzLPIYK/J3RTErL6Z99N2 m3J6pjwSJY/zNwuFPs9zGEnRO4g0BUbwGdbuvDzaq6/3OJLKohr5eLXNU3JkT+3HezydWm3W OPhauth7W0db74Qd49HXK0xe/aPrK+Cp+kU1HRactyNtF8jZQbhMCC8vMGukZtWaAwpjWiiH bA== Message-ID: Date: Thu, 16 Jul 2020 23:16:41 +0300 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.3.0 MIME-Version: 1.0 In-Reply-To: <20200716124833.93667-2-sgarzare@redhat.com> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit Sender: io-uring-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: io-uring@vger.kernel.org On 16/07/2020 15:48, Stefano Garzarella wrote: > The enumeration allows us to keep track of the last > io_uring_register(2) opcode available. > > Behaviour and opcodes names don't change. > > Signed-off-by: Stefano Garzarella > --- > include/uapi/linux/io_uring.h | 27 ++++++++++++++++----------- > 1 file changed, 16 insertions(+), 11 deletions(-) > > diff --git a/include/uapi/linux/io_uring.h b/include/uapi/linux/io_uring.h > index 7843742b8b74..efc50bd0af34 100644 > --- a/include/uapi/linux/io_uring.h > +++ b/include/uapi/linux/io_uring.h > @@ -253,17 +253,22 @@ struct io_uring_params { > /* > * io_uring_register(2) opcodes and arguments > */ > -#define IORING_REGISTER_BUFFERS 0 > -#define IORING_UNREGISTER_BUFFERS 1 > -#define IORING_REGISTER_FILES 2 > -#define IORING_UNREGISTER_FILES 3 > -#define IORING_REGISTER_EVENTFD 4 > -#define IORING_UNREGISTER_EVENTFD 5 > -#define IORING_REGISTER_FILES_UPDATE 6 > -#define IORING_REGISTER_EVENTFD_ASYNC 7 > -#define IORING_REGISTER_PROBE 8 > -#define IORING_REGISTER_PERSONALITY 9 > -#define IORING_UNREGISTER_PERSONALITY 10 > +enum { > + IORING_REGISTER_BUFFERS, > + IORING_UNREGISTER_BUFFERS, > + IORING_REGISTER_FILES, > + IORING_UNREGISTER_FILES, > + IORING_REGISTER_EVENTFD, > + IORING_UNREGISTER_EVENTFD, > + IORING_REGISTER_FILES_UPDATE, > + IORING_REGISTER_EVENTFD_ASYNC, > + IORING_REGISTER_PROBE, > + IORING_REGISTER_PERSONALITY, > + IORING_UNREGISTER_PERSONALITY, > + > + /* this goes last */ > + IORING_REGISTER_LAST > +}; It breaks userspace API. E.g. #ifdef IORING_REGISTER_BUFFERS > > struct io_uring_files_update { > __u32 offset; > -- Pavel Begunkov