From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mx0a-00069f02.pphosted.com (mx0a-00069f02.pphosted.com [205.220.165.32]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id BB1232C0F8C for ; Wed, 15 Apr 2026 10:41:35 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=fail smtp.client-ip=205.220.165.32 ARC-Seal:i=2; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1776249697; cv=fail; b=jvU2cEA6uf6j8XB9hDxHESUsuMTqkDKKMsN2IyUeM3gdlekLYuY4E3GDy/MRmBwLS8VCcwkU3F6mL/pQJfZY7a4Cuv+2p+mPRCa2P5bcbsFN/tX4Da74YFOv5aGgXLjLhaTNX3CBH7qjbmjDopMnUSOYGa63409d2yDE4UATjV4= ARC-Message-Signature:i=2; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1776249697; c=relaxed/simple; bh=GTiv6lzQsswsqk59ZSp9e6krl19geSih4X5QIsYf3K0=; h=From:To:Cc:Subject:Date:Message-ID:Content-Type:MIME-Version; b=k0+M+enxYcI6roIxEkrBPxrv0oZsWHYoW4iXXgENk2S7L5G8lojwF+kSP3Fs3B2yd4N5SRfRGmATqOotCp76z9V5FZDbguizICqCK/U34N9j8o0w25jnA9rlAe7nSG+nWMGxIH+m7/3o7Iz9gihMfsxW82MVkhMnVfUBL98Jae4= ARC-Authentication-Results:i=2; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=oracle.com; spf=pass smtp.mailfrom=oracle.com; dkim=pass (2048-bit key) header.d=oracle.com header.i=@oracle.com header.b=hbnehhlx; dkim=pass (1024-bit key) header.d=oracle.onmicrosoft.com header.i=@oracle.onmicrosoft.com header.b=Q1VLaXV9; arc=fail smtp.client-ip=205.220.165.32 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=oracle.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=oracle.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=oracle.com header.i=@oracle.com header.b="hbnehhlx"; dkim=pass (1024-bit key) header.d=oracle.onmicrosoft.com header.i=@oracle.onmicrosoft.com header.b="Q1VLaXV9" Received: from pps.filterd (m0246629.ppops.net [127.0.0.1]) by mx0b-00069f02.pphosted.com (8.18.1.11/8.18.1.11) with ESMTP id 63F9Bbvr270459; Wed, 15 Apr 2026 10:41:30 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=oracle.com; h=cc :content-transfer-encoding:content-type:date:from:message-id :mime-version:subject:to; s=corp-2025-04-25; bh=hoW5JkPs6XiM+Wzt yqT4VbTVvefKVn9/yUuXGilWKmY=; b=hbnehhlxR9byk+OnzS/mOTAj+lk6wrF/ LBvg7WuNTir2UkcphP8vOlbrS9o4v/CQtk2C6RNrx10EfxnNOfWm88ZZgA3UGHo/ 9NCEOEI1/Unq30QBukPSmK5RMVQ+pdWYs/xLLgTX9LYxKkUxCtiX4ZTGhfp+Gkhu 8oZuzcJnQUOQba9IxnpueDa6gT0722zzVVKtpF7Bxr69eIHrIQd5DOHH/3yIKdGJ G5akaJb20kISwpbSnYJQUqB4/PQEa4BWG46Qdi+1sjObMu7Tuz9b78rPvNE1HIS9 682rIUCuaoHV5Pi5n9ItDJxWOqMbeirPi7CvkzyzsSLegVKNtFpZCw== Received: from iadpaimrmta01.imrmtpd1.prodappiadaev1.oraclevcn.com (iadpaimrmta01.appoci.oracle.com [130.35.100.223]) by mx0b-00069f02.pphosted.com (PPS) with ESMTPS id 4dh87h4r6y-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Wed, 15 Apr 2026 10:41:29 +0000 (GMT) Received: from pps.filterd (iadpaimrmta01.imrmtpd1.prodappiadaev1.oraclevcn.com [127.0.0.1]) by iadpaimrmta01.imrmtpd1.prodappiadaev1.oraclevcn.com (8.18.1.7/8.18.1.7) with ESMTP id 63FAdSlt017172; Wed, 15 Apr 2026 10:41:28 GMT Received: from ch4pr04cu002.outbound.protection.outlook.com (mail-northcentralusazon11013036.outbound.protection.outlook.com [40.107.201.36]) by iadpaimrmta01.imrmtpd1.prodappiadaev1.oraclevcn.com (PPS) with ESMTPS id 4dh7nnrhuj-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Wed, 15 Apr 2026 10:41:28 +0000 (GMT) ARC-Seal: i=1; a=rsa-sha256; s=arcselector10001; d=microsoft.com; cv=none; b=UldpE97q5THVsbGJ2a60vXB53U5o3ODBYa7v449EqAw+xsM+qAdKX3vz77tt3MFiQKn3FHzZsJ2qUO+lJ9x5b5y0T3PZddYLpmPT/0VRB1DS1NL1Hp0/cXaOEqSIRqY8zZ3HuegsPXGI2gtyLvUib3d+WE+E0atMwemFtOZ4Z/XOFFBY59ib6y98tGDu+E2iu6JQD6vhyAJ3gx4AmJzZ+2CUbUy+eVMG/+Z4fdEPsvgookReiDsXw5kfwTnfMC6eRodLxkU99b8nIyYeV2HJd3sGlbue6g5+d8gy1MkpSiFjflRl4PTiUEutBtpDb9IGkysFwiEYgfa6A+kL5K12Pw== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=microsoft.com; s=arcselector10001; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-AntiSpam-MessageData-ChunkCount:X-MS-Exchange-AntiSpam-MessageData-0:X-MS-Exchange-AntiSpam-MessageData-1; bh=hoW5JkPs6XiM+WztyqT4VbTVvefKVn9/yUuXGilWKmY=; b=bGxZ/nsuLsvQ3texhVXCxRv/Nb1b2jMVW2x9kLnZV7sBWGiSDeqfknfcxuWv6TiskUWoEJf0GTZgs0PE5+VV1k4cj9cZvL2eBqYJv1ksfFFekBpKBE4nAGrEO627YxI7oEdXlbrAR3s8XK2guG0Qr2765ZPsk9sIXNggQHwUHP4cXYOV9sEnWt4EGNTqP6DfWa64IIfJ8jaqMCMf2VDhnaVsJfWFt0uNTRYYNDRQi4ARcPOucnlGF20KeusY7f2AOF/BjqrALsePMF+tTkQfk/0Bxrv5eg6pWYqdiAzBuVjWPJghez/XG6gp9hL2jOTeaWN+5GbKMUjn3/eVJNaF7A== ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=pass smtp.mailfrom=oracle.com; dmarc=pass action=none header.from=oracle.com; dkim=pass header.d=oracle.com; arc=none DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=oracle.onmicrosoft.com; s=selector2-oracle-onmicrosoft-com; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=hoW5JkPs6XiM+WztyqT4VbTVvefKVn9/yUuXGilWKmY=; b=Q1VLaXV91Vp+j/6Tyr4Zhc+nUZjGvRXLcJGiEn3FiilwlZpR7jo9o7c24E/GBruHnPhypsy6BuHRlZHkng+h6SQ554dV8abi1hJ7BT3tciM1+4qZw0Y/XdV+aDYmvXBC17NMEco7uQ/uc4k3359r4WygSuh1qOdx6VEghETt3mw= Received: from DS4PPFEAFA21C69.namprd10.prod.outlook.com (2603:10b6:f:fc00::d54) by PH7PR10MB5813.namprd10.prod.outlook.com (2603:10b6:510:132::7) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.9769.48; Wed, 15 Apr 2026 10:41:25 +0000 Received: from DS4PPFEAFA21C69.namprd10.prod.outlook.com ([fe80::5266:1601:5598:3f0a]) by DS4PPFEAFA21C69.namprd10.prod.outlook.com ([fe80::5266:1601:5598:3f0a%5]) with mapi id 15.20.9769.046; Wed, 15 Apr 2026 10:41:25 +0000 From: John Garry To: shinichiro.kawasaki@wdc.com, linux-block@vger.kernel.org Cc: linux-nvme@lists.infradead.org, nilay@linux.ibm.com, John Garry Subject: [PATCH blktests] nvme/068: add a test for multipath delayed removal Date: Wed, 15 Apr 2026 10:41:11 +0000 Message-ID: <20260415104111.1439459-1-john.g.garry@oracle.com> X-Mailer: git-send-email 2.43.5 Content-Transfer-Encoding: 8bit Content-Type: text/plain X-ClientProxiedBy: PH7P220CA0082.NAMP220.PROD.OUTLOOK.COM (2603:10b6:510:32c::17) To DS4PPFEAFA21C69.namprd10.prod.outlook.com (2603:10b6:f:fc00::d54) Precedence: bulk X-Mailing-List: linux-block@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: DS4PPFEAFA21C69:EE_|PH7PR10MB5813:EE_ X-MS-Office365-Filtering-Correlation-Id: e1b42e2c-f925-470c-6632-08de9adb8ae8 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|366016|1800799024|376014|18002099003|56012099003; X-Microsoft-Antispam-Message-Info: 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 X-Forefront-Antispam-Report: CIP:255.255.255.255;CTRY:;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:DS4PPFEAFA21C69.namprd10.prod.outlook.com;PTR:;CAT:NONE;SFS:(13230040)(366016)(1800799024)(376014)(18002099003)(56012099003);DIR:OUT;SFP:1101; X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: =?us-ascii?Q?9JQ3pBeNotPLkxxji/8qCbY/55kVEfpOP+YNUzf7jwCVaFIqL7gwbFeVGtkF?= =?us-ascii?Q?I7AAM8yr0L1t1E6zV4ydIAWtwY7Zisj2E42T/3ST1kLOgx+oDyguMdn1yG12?= =?us-ascii?Q?3s7LniTWk83iqlWCvBEMA9tcIauhTogiN1L+aCgvNaruwcz/pzcKyuAhDpF7?= =?us-ascii?Q?rwCR8r1U5lJoazpAu3sLr1aV8wRtVoovr7ha8FvRRmWQxvsC/GBfm7wScoP5?= =?us-ascii?Q?cYVlZH4d0aBojkkNPuj0Ntsv5/codr5Idm9AAzGZMUDwKf/721tq1weP4Or2?= =?us-ascii?Q?PHaHgnFAbZwW4Ht4ncRSXYamyYDRXb7WoIo9r6wj53WyFFMeY02W1y1wX3Km?= =?us-ascii?Q?KV/RbeHecsnYCvhDNT5nTS8vdxEgzaFHDC+GcK8jTvsolu8IJXX8QYl8I5GT?= =?us-ascii?Q?H3fUWFg2bxEb8tHlLzWz97BwCyGdTalwFdB+9qi04Olm99gysED7QniZEbL1?= =?us-ascii?Q?rSC1JyLLg9tolsFqvCrhryHNiDA9KdEIrEvgqfwyAD7rm56mYZXSKUpi4lUD?= =?us-ascii?Q?mS3Shap76K2nJTfRVa2os3XKAPPlaYZX2hYaQ4FVhrReUpUZZSBeIrK+OU5y?= =?us-ascii?Q?RBnN526PX0mIqnXnTaAoSASry17z5NV2bsQaRzvoqP3pNDQiRTN8/fQP7n/9?= =?us-ascii?Q?85Yqk+mxgZMx9+2Kd1brkXgPJYPTX4RcP7iyrkRY+eUXFxmOzf0rZuOmHVDb?= =?us-ascii?Q?NXBn+k2SRXFFfgcvFQG4kz49sa1/8Hyf8j5F74AmuxL43YYbkoTjLoPHzxB5?= =?us-ascii?Q?4FEMlvAtxksSDbNHd5kO6echyuZlQp/OelrSFXCirnSw7II54DnuKJobYRBy?= =?us-ascii?Q?xjWMfGypcj5OVrH5Mt9+P82GgKmGRD2C6gAF2eBtwVfE89ijjkVkr04WLZXl?= =?us-ascii?Q?d+GyFnRjNwN8TJm0W0KueGxSYg6BboMhjahIrh3i0hq66CBzCN69ZSoFOv5G?= =?us-ascii?Q?O3L97NwQ+FLJKq6+SYzVFEa2kMhVGZv6oswaEyRoCO/9OAvLmhXddUjLMB9d?= =?us-ascii?Q?NtXiQzcuTRmRh7bz9SoEwke2LE3jmPh52s6k+kNZbeBjJNNO4RFFe46jpNs+?= =?us-ascii?Q?z65LQrW/mmE9eK+qDWEZoXUNjoAzh7vpB6ISseGCLCIvJGVL1PAeQNbX/xe9?= =?us-ascii?Q?4gXL5jw0jsToohtT8DVD36TeoHsldK6nl4nbPskcMrXcRLzRw+jgveno15bV?= =?us-ascii?Q?QZuoP9NXvthiV14kuH0KC0iZmhsP0AY0Dc0mHlZM4X5dV2bL/36SJNcySMvC?= =?us-ascii?Q?YM35pYRNwXH6LkOTl1i4LDA8PBgWvwTKUDDYV82Yi4cMFaBohtjEAtbn0U1B?= =?us-ascii?Q?6BeqYp/cpv8GtaBUaV28m9fUqTC3EKKafkf/HIG+/1QUdD/K0Bqaq6S9pvA6?= =?us-ascii?Q?yqwJhVAkTkjI9a0EyxnlVZLedzeiWtGDUS3aheWtfgFJ8Kx8CtU7qdC1WZYj?= =?us-ascii?Q?vm+vwd2lTtLW2sKXxgyzeUWN1hqi9EX4g+QXereyLA+UPahCBksO4fUAX1iJ?= =?us-ascii?Q?aySskzXwZ6NDcqEK5wTJ1i+4STJYD73wQRGupXU0BbhCYlSGOoQ/taz7FIGN?= =?us-ascii?Q?Bk31/sdOlh4FtNHNDhrsUPq0fDQK4w+TjwAp144J5jVNzHrOe3rAQJGlAeAR?= =?us-ascii?Q?IBJjGeDwHZduhLBWrF+v1CiqI1F9yNfNy/TOFfqUwU89qV8Jhcn+Do2FMf3c?= =?us-ascii?Q?SSvgpdZEtfN3IdZZdnFr/HwTkINOj+pOsu0oHSGcfiWgxPQEiuu2fpINlp+Z?= =?us-ascii?Q?oAAFHTDdpQ=3D=3D?= X-Exchange-RoutingPolicyChecked: ADwFrPfS46u0S61BGMDr89um2N/ogBgF0Z8Oxv1r7d4Y+hG67uqRXXUIfP438u2gZY1qbIeMExcGGLYAJdUf6mAhGMMfx6/IHf0Sd8WyJbIQXHv/cCRvZh8HTS0xUZ9l6fd/yp9ptD1Zzmk8A2SpZCha/B2DLS/J2VGXG3sx4WVG+q28/Twp+TCpvpYinGCHXiXxXA7A11M8kF78fX9PYRBUA2NWC0BUQJ7L7Eu/PBZlNsVrzLhXSIQf4mzP8PFv9/bl9c6DdiAGA/qy9xrcutwd6KeFW7tn10sRDHly5uGjrqcDcY/4Xvo/E85dzQhj7mP8TONqbqKC1pp2SfkWlg== X-MS-Exchange-AntiSpam-ExternalHop-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-ExternalHop-MessageData-0: ZsDbIfQZCUG9nlwuq3L2KfxEdZYIF01XXmALvzWaLOGUDjRh6z2Z8GYvM09egWunGhJULLotH6il6DZ62WSt1NAg8DnZaRTHbjtfgjpNix2qHmJVfUtvpO2p+yJPbjZYv97FIJGk2UjThn/SmH7ojt4wpc+s8UDfv6m/vCcIsvrwGFkCOnx1eHpivYJYNMOsRtCdBYavheXRO9At/+pq4YnY4lFvB5/JTyFieEcwjj1IdGTFYVi8aIWX46/An2owGxdM4pOPCEy4KuMY/ZVm/q6h8P51sg5Q/YZfhzSnEbVTfmWLaSEMyQIlaQunHEDQOWHKBttK2ISTI1VGnvg+70jbEpCweWAl7r7Xb5pF6N3kGhzEp7DIUHFqnljvdyS4D+PSeeUdU6DxIfjxfKFiqglMu4wdYgMjGcyc2oTVZiWbHotDCouSTyZJBle/TU1U2nmZ7hsv/V2EAvYsWwcvrSar3gkL+e/PGuCAYfVqWs063XFMOSZOKRoUcvGXy8gQc37j58wLyPwIEQd/Gr5kuGsES1c97AE7acuAHESl3e+dhpYRkx3Nb1AXxTLuIdZSOhpehPRUaDZiTqxwfmUwo92oebj6isSvKAwc2U1ID2s= X-OriginatorOrg: oracle.com X-MS-Exchange-CrossTenant-Network-Message-Id: e1b42e2c-f925-470c-6632-08de9adb8ae8 X-MS-Exchange-CrossTenant-AuthSource: DS4PPFEAFA21C69.namprd10.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 15 Apr 2026 10:41:25.3978 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: 4e2c6054-71cb-48f1-bd6c-3a9705aca71b X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: EksfGSVlzTkrhNdhjWlZEJktJpB44Esrn8xe+V71sOVQ62KCDU6fu9qjC3vpv7kHoET7IKg69C5pfZNE3MMwhw== X-MS-Exchange-Transport-CrossTenantHeadersStamped: PH7PR10MB5813 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1143,Hydra:6.1.51,FMLib:17.12.100.49 definitions=2026-04-14_04,2026-04-13_04,2025-10-01_01 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 malwarescore=0 phishscore=0 lowpriorityscore=0 suspectscore=0 mlxlogscore=999 bulkscore=0 mlxscore=0 adultscore=0 spamscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.19.0-2604070000 definitions=main-2604150098 X-Authority-Analysis: v=2.4 cv=eJUjSnp1 c=1 sm=1 tr=0 ts=69df6b59 b=1 cx=c_pps a=zPCbziy225d3KhSqZt3L1A==:117 a=zPCbziy225d3KhSqZt3L1A==:17 a=6eWqkTHjU83fiwn7nKZWdM+Sl24=:19 a=z/mQ4Ysz8XfWz/Q5cLBRGdckG28=:19 a=lCpzRmAYbLLaTzLvsPZ7Mbvzbb8=:19 a=xqWC_Br6kY4A:10 a=A5OVakUREuEA:10 a=GoEa3M9JfhUA:10 a=VkNPw1HP01LnGYTKEx00:22 a=jiCTI4zE5U7BLdzWsZGv:22 a=EIcjfB9IiI4px24ztqRk:22 a=yPCof4ZbAAAA:8 a=AyUperUMAjGy_iXkiYIA:9 cc=ntf awl=host:12291 X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwNDE1MDA5OCBTYWx0ZWRfXzQSjRGKG/XnT 0bGEfuk7+xcqa9erE+DzVhEc2UnAj6fzN8Y6DFWRCScsKRoA+CWmjJT2O0rxfVJJnJvDndnrF/V WzWEabaFcyjzxZd+Hlnx7zPuyS9WbA41Lbm49/iputSM92ZCD8JQIjzUbEsbB8e/PW4fnVfEud1 s0lZUMopRrACNFP9dYhfOaS+wTFA+ulcZjUxrnJAv9jGwn5RS/qOJQVck7lPwN+CboNqTiPUljV YLJsHhxV4nqzy8+9CQVRNrVngzgt+EoqPwFFc6+btxl9tN/qffoXGkIwhwoIzbU1ojm43PRigk2 /KKOOO102+IXRbPNkvLFmsZ/XUXQraahdjtxCrWfwf7ZqAoKriaGmDlDiXcCeS3m5Yp0Gy+sDAZ 8REp3UfglFu+PDtAf+Cn1cWTMLA+wDcfmVZ+81LknrFRygwki567io/Z9oYVBoJZNM83CIAnhiv 6aApe7nNCQ8zlZBT31egCewYr/5waz6K0M1GBwyk= X-Proofpoint-ORIG-GUID: XmR6DBiZk97qlDT6kBY7SSScqYrPdVUE X-Proofpoint-GUID: XmR6DBiZk97qlDT6kBY7SSScqYrPdVUE For NVMe multipath, the delayed removal feature allows the multipath gendisk to remain present when all available paths are gone. The purpose of this feature is to ensure that we keep the gendisk for intermittent path failures. The delayed removal works on a timer - when all paths are gone, a timer is kicked off; once the timer expires and no paths have returned, the gendisk is removed. When all paths are gone and the gendisk is still present, all reads and writes to the disk are queued. If a path returns before the timer expiration, the timer canceled and the queued IO is submitted; otherwise they fail when the timer expires. This testcase covers two scenarios in separate parts: a. test that IOs submitted after all paths are removed (and do not return) fail b. test that IOs submitted between all paths removed and a path returning succeed During the period of the timer being active, it must be ensured that the nvme-core module is not removed. Otherwise the driver may not be present to handle the timeout expiry. The kernel ensures this by taking a reference to the module. Ideally, we would try to remove the module during this test to prove that this is not possible (and the kernel behaves as expected), but that module will probably not be removable anyway due to many references. To test this feature, check that the refcount of the nvme-core module is incremented when the delayed timer is active. Signed-off-by: John Garry diff --git a/common/rc b/common/rc index 5350057..6eae0e2 100644 --- a/common/rc +++ b/common/rc @@ -117,6 +117,16 @@ _module_not_in_use() { fi } +_module_use_count() { + local refcnt + if [ -f "/sys/module/$1/refcnt" ]; then + refcnt="$(cat /sys/module/"$1"/refcnt)" + echo $refcnt + return + fi + echo "" +} + _have_module_param() { _have_driver "$1" || return diff --git a/tests/nvme/068 b/tests/nvme/068 new file mode 100644 index 0000000..e06fd6b --- /dev/null +++ b/tests/nvme/068 @@ -0,0 +1,118 @@ +#!/bin/bash +# SPDX-License-Identifier: GPL-3.0+ +# Copyright (C) 2026 John Garry +# +# Test NVMe multipath delayed removal works as expected + +. tests/nvme/rc +. common/xfs + +DESCRIPTION="NVMe multipath delayed removal test" +QUICK=1 + +requires() { + _nvme_requires + _have_loop + _have_module_param_value nvme_core multipath Y + _require_nvme_trtype_is_fabrics +} + +set_conditions() { + _set_nvme_trtype "$@" +} + +_delayed_nvme_reconnect_ctrl() { + sleep 5 + _nvme_connect_subsys +} + +test() { + echo "Running ${TEST_NAME}" + + _setup_nvmet + + local nvmedev + local ns + local bytes_written + local refcnt_orig + local refcnt + _nvmet_target_setup + + _nvme_connect_subsys + + # Part a: Prove that writes fail when no path returns. Any reads or + # writes are queued during the delayed removal period. If no + # paths return before the timer expires, then those IOs should + # fail. + # During the delayed removal period, ensure that the module + # refcnt is incremented, to prove that we cannot remove the + # driver during this period. + nvmedev=$(_find_nvme_dev "${def_subsysnqn}") + ns=$(_find_nvme_ns "${def_subsys_uuid}") + refcnt=$(_module_use_count nvme_core) + echo 10 > "/sys/block/"$ns"/delayed_removal_secs" + refcnt_orig=$(_module_use_count nvme_core) + _nvme_disconnect_ctrl "${nvmedev}" + sleep 1 + ns=$(_find_nvme_ns "${def_subsys_uuid}") + if [[ "${ns}" = "" ]]; then + echo "could not find ns after disconnect" + fi + refcnt=$(_module_use_count nvme_core) + if [ "$refcnt" != "" ] && [ "$refcnt" -le "$refcnt_orig" ]; then + echo "module refcount did not increase" + fi + bytes_written=$(run_xfs_io_pwritev2 /dev/"$ns" 4096) + if [ "$bytes_written" == 4096 ]; then + echo "wrote successfully after disconnect" + fi + sleep 10 + ns=$(_find_nvme_ns "${def_subsys_uuid}") + if [[ !"${ns}" = "" ]]; then + echo "found ns after delayed removal" + fi + refcnt=$(_module_use_count nvme_core) + if [ "$refcnt" != "" ] && [ "$refcnt" -ne "$refcnt_orig" ]; then + echo "module refcount not as original" + fi + + # Part b: Ensure writes for an intermittent disconnect are successful. + # During an intermittent disconnect, any reads or writes + # queued should succeed after a path returns. + # Also ensure module refcount behaviour is as expected, as + # above. + _nvme_connect_subsys + + nvmedev=$(_find_nvme_dev "${def_subsysnqn}") + ns=$(_find_nvme_ns "${def_subsys_uuid}") + refcnt_orig=$(_module_use_count nvme_core) + echo 10 > "/sys/block/"$ns"/delayed_removal_secs" + _nvme_disconnect_ctrl "${nvmedev}" + sleep 1 + ns=$(_find_nvme_ns "${def_subsys_uuid}") + if [[ "${ns}" = "" ]]; then + echo "could not find ns after disconnect" + fi + _delayed_nvme_reconnect_ctrl "${nvmedev}" & + bytes_written=$(run_xfs_io_pwritev2 /dev/"$ns" 4096) + if [ "$bytes_written" != 4096 ]; then + echo "could not write successfully with reconnect" + fi + sleep 10 + ns=$(_find_nvme_ns "${def_subsys_uuid}") + if [[ "${ns}" = "" ]]; then + echo "could not find ns after delayed reconnect" + fi + refcnt=$(_module_use_count nvme_core) + if [ "$refcnt" != "" ] && [ "$refcnt" -ne "$refcnt_orig" ]; then + echo "module refcount not as original" + fi + + # Final tidy-up + echo 0 > /sys/block/"$ns"/delayed_removal_secs + nvmedev=$(_find_nvme_dev "${def_subsysnqn}") + _nvme_disconnect_ctrl "${nvmedev}" + _nvmet_target_cleanup + + echo "Test complete" +} diff --git a/tests/nvme/068.out b/tests/nvme/068.out new file mode 100644 index 0000000..b913d19 --- /dev/null +++ b/tests/nvme/068.out @@ -0,0 +1,3 @@ +Running nvme/068 +pwrite: Input/output error +Test complete -- 2.43.5