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=-18.8 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, USER_AGENT_GIT 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 116E7C4361B for ; Tue, 8 Dec 2020 02:49:01 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id C7BC9233FD for ; Tue, 8 Dec 2020 02:49:00 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728191AbgLHCso (ORCPT ); Mon, 7 Dec 2020 21:48:44 -0500 Received: from us-smtp-delivery-124.mimecast.com ([216.205.24.124]:25168 "EHLO us-smtp-delivery-124.mimecast.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726830AbgLHCso (ORCPT ); Mon, 7 Dec 2020 21:48:44 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1607395638; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=xJW5IJGNOP6CMuFv2EzyZw9QmKSzTdQS44PAdYMNjXU=; b=g5upWyexM2bZOjnu5Iwc//jXTU29F7zMbcem0Qhl9c2aat8A+Huf6ni+d+J8OHgY+ysU+J NjZ/As3h2JskcUxEPmH1xnJuNsCgP/Sdmerpt+3hvZdCZJWSrQcIrZPQ0OpYC1mL3V67zo bsJ9ROebAft4oo+dn2rXMnidhuRvRmw= Received: from mail-qv1-f70.google.com (mail-qv1-f70.google.com [209.85.219.70]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-327-JbxSHN-YOrqRm2h0JPOhaA-1; Mon, 07 Dec 2020 21:47:17 -0500 X-MC-Unique: JbxSHN-YOrqRm2h0JPOhaA-1 Received: by mail-qv1-f70.google.com with SMTP id j5so3662055qvu.22 for ; Mon, 07 Dec 2020 18:47:17 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=xJW5IJGNOP6CMuFv2EzyZw9QmKSzTdQS44PAdYMNjXU=; b=lOzPlabN+d6Wj+WNugTXWBKxl7bjJQD7gwOIN80kMMtE2EnTxvrmBRdllSqnQHciII PMJ1k3Hlia1CaT7kmacIEvvKQuknWF/zUm4T+jp6dPfEBKf7AyGij/jyFZZKr/ddvygP XT+Hm4K4iTPoeyM+c7aGBjmQvlYda5FF+TS7BzqYi3/svuAVz+xAPi+C+g1e/7w7tAeY wh7lQrNNKNKNN4NbmHWwpKJugerxWeq3gfNfrqyHYcSDVe3t7H5tHjP9zda5+RYnS++l eiSzz87JGVBHGOqh+RVGfXt0EqoyyFf9eM/yQmdYMCfiDeuPTi0eNN+FGknIWE4BIRdO dKBw== X-Gm-Message-State: AOAM532WePv6pJz8MWmPghSmiP8XVIGk36TbcRA4FIHPQLwz0nntaARd bD7R3glNWmsq1P0zbNS5sOXaIRmj99cWHnKrnHsjH5GlWkLiIjvKfYsKmMbLzQV5vRu3lVaeHee UY2UJ97SMVdEyDb0qBlD6kZBjIq3t8NJviK82kNlCvSDR79RR4mkmNzqasQCB0u3zZWlYOeIcoQ == X-Received: by 2002:ac8:3594:: with SMTP id k20mr27520683qtb.18.1607395636390; Mon, 07 Dec 2020 18:47:16 -0800 (PST) X-Google-Smtp-Source: ABdhPJyK/+FRKLaJf67qFnojJEv5Ns9Slni9W1KgjcqTZnfv18RXlSVAdRnY1kJAEB1cQ1aYreeo1w== X-Received: by 2002:ac8:3594:: with SMTP id k20mr27520665qtb.18.1607395636145; Mon, 07 Dec 2020 18:47:16 -0800 (PST) Received: from localhost.localdomain ([142.126.83.202]) by smtp.gmail.com with ESMTPSA id n95sm13778744qte.43.2020.12.07.18.47.14 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 07 Dec 2020 18:47:15 -0800 (PST) From: Peter Xu To: linux-kernel@vger.kernel.org, linux-mm@kvack.org Cc: Andrea Arcangeli , Andrew Morton , peterx@redhat.com, Mike Rapoport Subject: [PATCH 3/3] userfaultfd/selftests: Hint the test runner on required privilege Date: Mon, 7 Dec 2020 21:47:09 -0500 Message-Id: <20201208024709.7701-4-peterx@redhat.com> X-Mailer: git-send-email 2.26.2 In-Reply-To: <20201208024709.7701-1-peterx@redhat.com> References: <20201208024709.7701-1-peterx@redhat.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Now userfaultfd test program requires either root or ptrace privilege due to the signal/event tests. When UFFDIO_API failed, hint the test runner about this fact verbosely. Signed-off-by: Peter Xu --- tools/testing/selftests/vm/userfaultfd.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/tools/testing/selftests/vm/userfaultfd.c b/tools/testing/selftests/vm/userfaultfd.c index f0647bfda366..27a1709099d0 100644 --- a/tools/testing/selftests/vm/userfaultfd.c +++ b/tools/testing/selftests/vm/userfaultfd.c @@ -755,7 +755,8 @@ static int userfaultfd_open(int features) uffdio_api.api = UFFD_API; uffdio_api.features = features; if (ioctl(uffd, UFFDIO_API, &uffdio_api)) { - fprintf(stderr, "UFFDIO_API\n"); + fprintf(stderr, "UFFDIO_API failed.\nPlease make sure to " + "run with either root or ptrace capability.\n"); return 1; } if (uffdio_api.api != UFFD_API) { -- 2.26.2