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 98803C43215 for ; Fri, 15 Nov 2019 03:57:46 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 5D4A92072B for ; Fri, 15 Nov 2019 03:57:46 +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="JciRtdm/" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726674AbfKOD5p (ORCPT ); Thu, 14 Nov 2019 22:57:45 -0500 Received: from mail-pl1-f178.google.com ([209.85.214.178]:46543 "EHLO mail-pl1-f178.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727004AbfKOD5p (ORCPT ); Thu, 14 Nov 2019 22:57:45 -0500 Received: by mail-pl1-f178.google.com with SMTP id l4so3706972plt.13 for ; Thu, 14 Nov 2019 19:57:45 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ryussi-com.20150623.gappssmtp.com; s=20150623; h=from:subject:to:message-id:date:user-agent:mime-version :content-transfer-encoding:content-language; bh=+K2ll8VHrzw8g7HSAa+mTDd2lbmDbwQQkL7WgmTkqMA=; b=JciRtdm/8Luv52rfYFzsfBZKeFsubbUFGg/8AawKh4E1igwOcoDGHcaMEZHrqk2brh /si3o9Hg3fw1JHYxGPTB89D8QE3PJbUu7ts8Bi0117JFOJrcGrTll0EA6j/TqmiRspaA cK+lvm+McTRIkVzNDvqysan3K8NKmgrUF5ulGt9G4iyU1ItuB1wccX3vDhq6wDfdxhv5 9jrgtPC65ICT/jLmHSzkeo7aESSRuOn1pHPmwDDZ6O48Dw1UIPjBCvXeVsMua1LtA7a8 z2ggXrBcaKwl7WCm15Q3cFLvlApdzJ9eS1iTFtH3bzJxBbFTe7fqKWLNRg9BtpZlaYps dgFg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:subject:to:message-id:date:user-agent :mime-version:content-transfer-encoding:content-language; bh=+K2ll8VHrzw8g7HSAa+mTDd2lbmDbwQQkL7WgmTkqMA=; b=FRy+lcEEh0PkhXsAplXNXLrU75iVVMy5Z0yiinN8B1jSYwe2QL1rTX5rX6SrI4WC+w UmCgVhp+vC/RexwJl/HcTS9/j7KnBmKXOLQFp0C0RGfviKeH4N79hq7UnDsN1qxz0eAJ KbqUd3MgRTtlI7ikOiJV8D8NMZJCbyHMD8o0HLXA4hvdSAEb+0kS+LGWKpoeM/A4qzzm /PrusxoCZarJaXNFhMQq2na9kgKCiVBmZTQencxQT3NgCscgYcz038yPV3ipeQu4ZNP0 CKSjz074jEW4aPrynSX4Bg85fT0kbJlMRaV1VhHS/RHZibJwxOmTThWfd+7FXMIZGNy+ xLUA== X-Gm-Message-State: APjAAAVCjWN9z5Tf/ar8GxtqeW+KhgRYb8B/PrgjJ1VHsKCtLhYd2IkL z8nzgfR+DvqgwrqYI+3nnn6MIegbk08= X-Google-Smtp-Source: APXvYqyv6obhucOhH2cZvKzuXjjiNGAVaFC9K7oDl2KHuBfoEeOqHDZ/ghLfFOyQYAn6n6I0zt4oBA== X-Received: by 2002:a17:902:b482:: with SMTP id y2mr13352507plr.128.1573790264331; Thu, 14 Nov 2019 19:57:44 -0800 (PST) Received: from [172.31.254.84] ([182.73.204.74]) by smtp.gmail.com with ESMTPSA id k66sm4691730pgk.16.2019.11.14.19.57.42 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Thu, 14 Nov 2019 19:57:43 -0800 (PST) From: Vinit Agnihotri Subject: [question] ibv_reg_mr() returning EACCESS To: linux-rdma@vger.kernel.org Message-ID: <141f4c07-b7f1-1355-7ff7-d62605ee63b5@ryussi.com> Date: Fri, 15 Nov 2019 09:27:40 +0530 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.9.0 MIME-Version: 1.0 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 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. Thanks & Regards, Vinit.