From patchwork Tue Aug 28 17:26:08 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Thiago Jung Bauermann X-Patchwork-Id: 10578909 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 7116A175A for ; Tue, 28 Aug 2018 17:26:47 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 53C332A92E for ; Tue, 28 Aug 2018 17:26:47 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 465D92A934; Tue, 28 Aug 2018 17:26:47 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-7.9 required=2.0 tests=BAYES_00,MAILING_LIST_MULTI, RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id BDEBA2A92E for ; Tue, 28 Aug 2018 17:26:46 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727067AbeH1VTZ (ORCPT ); Tue, 28 Aug 2018 17:19:25 -0400 Received: from mx0a-001b2d01.pphosted.com ([148.163.156.1]:37752 "EHLO mx0a-001b2d01.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727624AbeH1VTV (ORCPT ); Tue, 28 Aug 2018 17:19:21 -0400 Received: from pps.filterd (m0098396.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.16.0.22/8.16.0.22) with SMTP id w7SHIr5d143563 for ; Tue, 28 Aug 2018 13:26:40 -0400 Received: from e14.ny.us.ibm.com (e14.ny.us.ibm.com [129.33.205.204]) by mx0a-001b2d01.pphosted.com with ESMTP id 2m586xq0xm-1 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=NOT) for ; Tue, 28 Aug 2018 13:26:40 -0400 Received: from localhost by e14.ny.us.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! 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Violators will be prosecuted; (version=TLSv1/SSLv3 cipher=AES256-GCM-SHA384 bits=256/256) Tue, 28 Aug 2018 13:26:36 -0400 Received: from b01ledav004.gho.pok.ibm.com (b01ledav004.gho.pok.ibm.com [9.57.199.109]) by b01cxnp23034.gho.pok.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id w7SHQZ4t22282272 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=FAIL); Tue, 28 Aug 2018 17:26:35 GMT Received: from b01ledav004.gho.pok.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 62C46112063; Tue, 28 Aug 2018 13:26:10 -0400 (EDT) Received: from b01ledav004.gho.pok.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 6FFDC112066; Tue, 28 Aug 2018 13:26:08 -0400 (EDT) Received: from morokweng.localdomain.com (unknown [9.80.236.98]) by b01ledav004.gho.pok.ibm.com (Postfix) with ESMTP; Tue, 28 Aug 2018 13:26:08 -0400 (EDT) From: Thiago Jung Bauermann To: linux-kselftest@vger.kernel.org Cc: linux-kernel@vger.kernel.org, Shuah Khan , Andrea Arcangeli , Mike Rapoport , Prakash Sangappa , Thiago Jung Bauermann Subject: [PATCH v3 4/4] userfaultfd: selftest: make supported range ioctl verification more robust Date: Tue, 28 Aug 2018 14:26:08 -0300 X-Mailer: git-send-email 2.14.4 In-Reply-To: <20180828172608.30075-1-bauerman@linux.ibm.com> References: <20180828172608.30075-1-bauerman@linux.ibm.com> X-TM-AS-GCONF: 00 x-cbid: 18082817-0052-0000-0000-000003275028 X-IBM-SpamModules-Scores: X-IBM-SpamModules-Versions: BY=3.00009627; HX=3.00000242; KW=3.00000007; PH=3.00000004; SC=3.00000266; SDB=6.01080161; UDB=6.00557147; IPR=6.00860145; MB=3.00022981; MTD=3.00000008; XFM=3.00000015; UTC=2018-08-28 17:26:38 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 18082817-0053-0000-0000-00005DE25E1B Message-Id: <20180828172608.30075-5-bauerman@linux.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:,, definitions=2018-08-28_07:,, signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 malwarescore=0 suspectscore=1 phishscore=0 bulkscore=0 spamscore=0 clxscore=1015 lowpriorityscore=0 mlxscore=0 impostorscore=0 mlxlogscore=999 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1807170000 definitions=main-1808280173 Sender: linux-kselftest-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kselftest@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP From: Mike Rapoport When userfaultfd tests runs on older kernel that does not support UFFDIO_ZEROPAGE for shared memory it fails at the ioctl verification. Split out the verification that supported ioctls are superset of the expected ioctls and relax the checks for UFFDIO_ZEROPAGE for shared memory areas. Signed-off-by: Mike Rapoport Signed-off-by: Thiago Jung Bauermann --- tools/testing/selftests/vm/userfaultfd.c | 63 +++++++++++++++++--------------- 1 file changed, 34 insertions(+), 29 deletions(-) diff --git a/tools/testing/selftests/vm/userfaultfd.c b/tools/testing/selftests/vm/userfaultfd.c index c84e44ddf314..676cbedff3db 100644 --- a/tools/testing/selftests/vm/userfaultfd.c +++ b/tools/testing/selftests/vm/userfaultfd.c @@ -271,6 +271,32 @@ static int my_bcmp(char *str1, char *str2, size_t n) return 0; } +static int verify_ioctls(unsigned long supported_ioctls) +{ + unsigned long expected_ioctls = uffd_test_ops->expected_ioctls; + + if ((supported_ioctls & expected_ioctls) == expected_ioctls) + return 0; + + /* + * For older kernels shared memory may not have UFFDIO_ZEROPAGE. + * In this case we just mask it out from the + * expected_ioctls. The userfaultfd_zeropage_test will then + * verify that an attempt to use UFFDIO_ZEROPAGE returns + * EINVAL + */ + if (test_type == TEST_SHMEM) { + expected_ioctls &= ~(1 << _UFFDIO_ZEROPAGE); + if ((supported_ioctls & expected_ioctls) == expected_ioctls) { + uffd_test_ops->expected_ioctls = expected_ioctls; + return 0; + } + } + + fprintf(stderr, "unexpected missing ioctl\n"); + return 1; +} + static void *locking_thread(void *arg) { unsigned long cpu = (unsigned long) arg; @@ -856,7 +882,6 @@ static int uffdio_zeropage(int ufd, unsigned long offset) static int userfaultfd_zeropage_test(void) { struct uffdio_register uffdio_register; - unsigned long expected_ioctls; int err; printf("testing UFFDIO_ZEROPAGE: "); @@ -875,12 +900,8 @@ static int userfaultfd_zeropage_test(void) if (ioctl(uffd, UFFDIO_REGISTER, &uffdio_register)) fprintf(stderr, "register failure\n"), exit(1); - expected_ioctls = uffd_test_ops->expected_ioctls; - if ((uffdio_register.ioctls & expected_ioctls) != - expected_ioctls) - fprintf(stderr, - "unexpected missing ioctl for anon memory\n"), - exit(1); + if (verify_ioctls(uffdio_register.ioctls)) + return 1; if (uffdio_zeropage(uffd, 0)) { if (my_bcmp(area_dst, zeropage, page_size)) @@ -895,7 +916,6 @@ static int userfaultfd_zeropage_test(void) static int userfaultfd_events_test(void) { struct uffdio_register uffdio_register; - unsigned long expected_ioctls; unsigned long userfaults; pthread_t uffd_mon; int err, features; @@ -922,12 +942,8 @@ static int userfaultfd_events_test(void) if (ioctl(uffd, UFFDIO_REGISTER, &uffdio_register)) fprintf(stderr, "register failure\n"), exit(1); - expected_ioctls = uffd_test_ops->expected_ioctls; - if ((uffdio_register.ioctls & expected_ioctls) != - expected_ioctls) - fprintf(stderr, - "unexpected missing ioctl for anon memory\n"), - exit(1); + if (verify_ioctls(uffdio_register.ioctls)) + return 1; if (pthread_create(&uffd_mon, &attr, uffd_poll_thread, NULL)) perror("uffd_poll_thread create"), exit(1); @@ -957,7 +973,6 @@ static int userfaultfd_events_test(void) static int userfaultfd_sig_test(void) { struct uffdio_register uffdio_register; - unsigned long expected_ioctls; unsigned long userfaults; pthread_t uffd_mon; int err, features; @@ -982,12 +997,8 @@ static int userfaultfd_sig_test(void) if (ioctl(uffd, UFFDIO_REGISTER, &uffdio_register)) fprintf(stderr, "register failure\n"), exit(1); - expected_ioctls = uffd_test_ops->expected_ioctls; - if ((uffdio_register.ioctls & expected_ioctls) != - expected_ioctls) - fprintf(stderr, - "unexpected missing ioctl for anon memory\n"), - exit(1); + if (verify_ioctls(uffdio_register.ioctls)) + return 1; if (faulting_process(1)) fprintf(stderr, "faulting process failed\n"), exit(1); @@ -1088,8 +1099,6 @@ static int userfaultfd_stress(void) err = 0; while (bounces--) { - unsigned long expected_ioctls; - printf("bounces: %d, mode:", bounces); if (bounces & BOUNCE_RANDOM) printf(" rnd"); @@ -1115,13 +1124,9 @@ static int userfaultfd_stress(void) fprintf(stderr, "register failure\n"); return 1; } - expected_ioctls = uffd_test_ops->expected_ioctls; - if ((uffdio_register.ioctls & expected_ioctls) != - expected_ioctls) { - fprintf(stderr, - "unexpected missing ioctl for anon memory\n"); + + if (verify_ioctls(uffdio_register.ioctls)) return 1; - } if (area_dst_alias) { uffdio_register.range.start = (unsigned long)