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=-2.2 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, USER_AGENT_SANE_1 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 384ACC432C0 for ; Mon, 18 Nov 2019 04:59:39 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id E749420727 for ; Mon, 18 Nov 2019 04:59:38 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=ryussi-com.20150623.gappssmtp.com header.i=@ryussi-com.20150623.gappssmtp.com header.b="XzKqzgTF" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726328AbfKRE7i (ORCPT ); Sun, 17 Nov 2019 23:59:38 -0500 Received: from mail-pl1-f196.google.com ([209.85.214.196]:42281 "EHLO mail-pl1-f196.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726314AbfKRE7i (ORCPT ); Sun, 17 Nov 2019 23:59:38 -0500 Received: by mail-pl1-f196.google.com with SMTP id j12so9035482plt.9 for ; Sun, 17 Nov 2019 20:59:37 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ryussi-com.20150623.gappssmtp.com; s=20150623; h=subject:to:cc:references:from:message-id:date:user-agent :mime-version:in-reply-to:content-transfer-encoding:content-language; bh=7CVKJX4iKY/TyW+AjcBFkCW+JCWb9TO+uAsM/3K11s0=; b=XzKqzgTFDiAjJsqjbko2C8EtVXoL9hlbcC4IzsRAXtyiFzdKvvRHI2BryEjrm4b2YO /S+0+QIdyQ4AkqXsugG4wCIAVVaoX1UtS2ruDuJjC+7mft1sj+0B4WMagWSf6xMmrdOJ dXLP81WTShGVAoRsUGhNTR6cPAqgeMEvnQbezcRZMKlgDYkrQFcgzV1w5E7ELsKwGZX2 2JQQEDFHf0UD6hQzTr3I4I0ctiiG2uZ2nJM8INyIniNUREPhNpul42Ks2MktoH/xUw6M 0irvj2TOi2DtKXHzHE67AgvBVrlxM/ZuUAXHikYzmObTovfxkEevexHk6Mo3BdNF26Rt vpBQ== 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:message-id:date :user-agent:mime-version:in-reply-to:content-transfer-encoding :content-language; bh=7CVKJX4iKY/TyW+AjcBFkCW+JCWb9TO+uAsM/3K11s0=; b=HYMvZ2XOywArjgUsrlk28c8HknffTtUkhX3bQo50sJqyIvPZTPk0lv8PWPEB1dIf65 KKzUAB0QLMiXdbu3ESVMtlIUSn2jqsw1kacxvYTjJN8+/RczlWzhaVL3Q/HEixi7UeFi RHcafYCslNV4PNVnRQHOMJOpGTzRCxk3njK0Bx5q0uksR3zRDuWdEjXzBbDVhFbz3vrc pigq7zZRKXW0XwAZRXg28AC4sW99RQ5FOdVYqUC+sf+uLxCx71usK9rCiZZ0LkUdRrFR eNJSP+PYz9TezZl8wJVMmUA9DsFTncBWotdRDWsxfGhnUjZIKo2EiUHqKprs2JwN/6d2 aoig== X-Gm-Message-State: APjAAAXeLEqCWC/wmqyo6Sup7AITf9E01uicz1ZumrE9nEKV4FSYGdYh o6ncyJd9//NKbVm5/UXhXvKCd5OE7jQ= X-Google-Smtp-Source: APXvYqyxO645VOu0HSClxidfDJSaXFFaUcHtuyt/g9x68hTallClJdTcATiab5fRVaiV+iRc9HfDJw== X-Received: by 2002:a17:90a:a58b:: with SMTP id b11mr37417244pjq.46.1574053176883; Sun, 17 Nov 2019 20:59:36 -0800 (PST) Received: from [172.31.254.84] ([182.73.204.74]) by smtp.gmail.com with ESMTPSA id p3sm20238000pfb.163.2019.11.17.20.59.34 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Sun, 17 Nov 2019 20:59:36 -0800 (PST) Subject: Re: [question] ibv_reg_mr() returning EACCESS To: Jason Gunthorpe Cc: linux-rdma@vger.kernel.org References: <141f4c07-b7f1-1355-7ff7-d62605ee63b5@ryussi.com> <20191115141210.GC4055@ziepe.ca> From: Vinit Agnihotri Message-ID: Date: Mon, 18 Nov 2019 10:29:33 +0530 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.9.0 MIME-Version: 1.0 In-Reply-To: <20191115141210.GC4055@ziepe.ca> Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 8bit Content-Language: en-US Sender: linux-rdma-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-rdma@vger.kernel.org Thank you Jason. I did went through archives for the same. Can you please provide pointer towards documentation or sample userspace usage for the same? Or which kernel version to be looked into? Thanks & Regards, Vinit. On 15/11/19 7:42 PM, Jason Gunthorpe wrote: > On Fri, Nov 15, 2019 at 09:27:40AM +0530, Vinit Agnihotri wrote: >> Hi, >> >> I am trying to use setfsgid()/setfssid() calls to ensure proper access check >> for linux users. >> >> However if user is non-root then ibv_reg_mr() returns EACCESS. While I am >> sure I am calling ibv_reg_mr() >> >> as root user, not sure why it still returns EACCESS. >> >> While going through libibverbs sources I realize EACCESS might be returned >> by this call: >> >> if (write(pd->context->cmd_fd, cmd, cmd_size) != cmd_size) >>         return errno; >> >> Can anyone provide any insight into this behavior? Does calling these >> systems calls in threads can affect >> >> entire process? I checked /dev/infiniband/* has appropriate privileges. > This is a security limitation, if you want do this flow you need a new > enough kernel and rdma-core to support the ioctl() scheme for calling > verbs > > Jason