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=-18.7 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,MSGID_FROM_MTA_HEADER,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 BFD14C433B4 for ; Sat, 3 Apr 2021 23:24:50 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 9D56F61361 for ; Sat, 3 Apr 2021 23:24:50 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S236973AbhDCXYx (ORCPT ); Sat, 3 Apr 2021 19:24:53 -0400 Received: from aserp2130.oracle.com ([141.146.126.79]:45092 "EHLO aserp2130.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S236970AbhDCXYd (ORCPT ); Sat, 3 Apr 2021 19:24:33 -0400 Received: from pps.filterd (aserp2130.oracle.com [127.0.0.1]) by aserp2130.oracle.com (8.16.0.42/8.16.0.42) with SMTP id 133NKJiK097412; Sat, 3 Apr 2021 23:24:20 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=oracle.com; h=from : to : cc : subject : date : message-id : in-reply-to : references : content-transfer-encoding : content-type : mime-version; s=corp-2020-01-29; bh=UUD07z7QbguOgdelNpJw1RzE1qxtr9WjpkTD6DTLl/c=; b=sz93juKkzjxK9SPvyugq8WGhtMwPLz5f4FfDMcFIr5oqFyEM7jRrhzqGWX/RGiiefSO6 nQTuP7bQr7sn6sRcROM88a0jASKPX6nXa9jBK5GPv6FXlWK9V0wncY0MQvHWgxedg2q9 vk0OqH9jLcETAyD+frUqb9zu99ahVx4ZE0iApOGqfjZ0OJfsbdHrM9MZqwTB+cmxGmrW 95yryJF+9BlxTtCwMvQixjtCNiEYDJFbDvVZdIXEhvd1MKZYLSYq1BpZIYTwb2N/84Af MjnEPLa4pmmFMGLY/GR8wOeIUPsQB3Ws5ZhSgznnd2Eq1eXDc9EZfg5Zx7EPOU1nxCCH qw== Received: from userp3020.oracle.com (userp3020.oracle.com [156.151.31.79]) by aserp2130.oracle.com with ESMTP id 37pdvb8v6v-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Sat, 03 Apr 2021 23:24:20 +0000 Received: from pps.filterd (userp3020.oracle.com [127.0.0.1]) by userp3020.oracle.com (8.16.0.42/8.16.0.42) with SMTP id 133NKtWl117032; Sat, 3 Apr 2021 23:24:19 GMT Received: from nam11-co1-obe.outbound.protection.outlook.com (mail-co1nam11lp2175.outbound.protection.outlook.com [104.47.56.175]) by userp3020.oracle.com with ESMTP id 37pfpkbsrd-3 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Sat, 03 Apr 2021 23:24:19 +0000 ARC-Seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=m0DN113trwd+nUAvhksXjynoqtkUVSPm5vZj1l+PG85O2xEvqaZU+adZxW9y0pZxX9STViPhKBfk1ekn6CbkwoHfslAdaKK3g7m5qyArDkhpwpVgc82GFtIMFuIfL9d36TTxrh9jACUIy6GZX0rx5WuPNZXqChY+v4etCvL2aFmZSMdX7QcxwZ5FPOJ4B/CoNiFkaBJqUmQggU8zlcvlkVaK4r5tjcUqymgfo/ZpTusLWf/1IVEnYYHqCtm+7ogV5po3110qr/Hua108/rYTvWFjjpl4EwjAJT0dRg0L+75qsHKFCMfnIJ78yQy+MqchXPWsIF4zpeeOzLiPhGS3FA== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=microsoft.com; s=arcselector9901; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=UUD07z7QbguOgdelNpJw1RzE1qxtr9WjpkTD6DTLl/c=; b=XbcwgqzSv6ZhGBn7UBZVELxwtC7blUuo9ZWwVSNvmNzimRRKHq/eCLx+mnY8lSkhj2h5mzJGXO4XuNQwWO7S1u8TJLrzrZ37rTViNo/IzNpdntyJQ+zhH0yxnAqNLNxHv3ofS1qvgM7NZXPDZzS4v1DlfhQGcE7YxCoHWdRYC43bSqW64sd2+y2ofHWUtUIEmrtpCwIXpMLHbL95TTYMGzznuzgIIYniRp+LEcG50gxabezg4RUsUVOw1Cd+vh19kpPCTh4h0xiT2nsBrYwK1RJWBMIaIacV5llLMi0Y75Ro/ARTuDR7SYIn4XLK42XiUibSqVtg/yRDfQiJQXTAuw== 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=UUD07z7QbguOgdelNpJw1RzE1qxtr9WjpkTD6DTLl/c=; b=uC0oKGfHjiw7n6cvss/b+1XRU1qpgqiKunfhAZWrYYGTb4MS1jmXARse3x8MQaxTd8OV74K6ueKD3y+6izYNJXjp763o98vmHVRBUZm3JmrhONNqJ3IYMaiFR2uQoL3VeZdiVjUiQQxiJiFv6HfNRkMvr4HdhYFUTRe2yyHFWeU= Authentication-Results: suse.com; dkim=none (message not signed) header.d=none;suse.com; dmarc=none action=none header.from=oracle.com; Received: from BYAPR10MB3573.namprd10.prod.outlook.com (2603:10b6:a03:11e::32) by BYAPR10MB3431.namprd10.prod.outlook.com (2603:10b6:a03:86::33) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.3999.28; Sat, 3 Apr 2021 23:24:17 +0000 Received: from BYAPR10MB3573.namprd10.prod.outlook.com ([fe80::50bb:7b66:35ee:4a4]) by BYAPR10MB3573.namprd10.prod.outlook.com ([fe80::50bb:7b66:35ee:4a4%7]) with mapi id 15.20.3999.032; Sat, 3 Apr 2021 23:24:17 +0000 From: Mike Christie To: lduncan@suse.com, cleech@redhat.com, njavali@marvell.com, mrangankar@marvell.com, GR-QLogic-Storage-Upstream@marvell.com, varun@chelsio.com, subbu.seetharaman@broadcom.com, ketan.mukadam@broadcom.com, jitendra.bhivare@broadcom.com, martin.petersen@oracle.com, linux-scsi@vger.kernel.org, jejb@linux.ibm.com Cc: Mike Christie Subject: [PATCH 25/40] scsi: iscsi: add mgmt lock Date: Sat, 3 Apr 2021 18:23:18 -0500 Message-Id: <20210403232333.212927-26-michael.christie@oracle.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20210403232333.212927-1-michael.christie@oracle.com> References: <20210403232333.212927-1-michael.christie@oracle.com> Content-Transfer-Encoding: 8bit Content-Type: text/plain X-Originating-IP: [73.88.28.6] X-ClientProxiedBy: DS7PR03CA0137.namprd03.prod.outlook.com (2603:10b6:5:3b4::22) To BYAPR10MB3573.namprd10.prod.outlook.com (2603:10b6:a03:11e::32) MIME-Version: 1.0 X-MS-Exchange-MessageSentRepresentingType: 1 Received: from localhost.localdomain (73.88.28.6) by DS7PR03CA0137.namprd03.prod.outlook.com (2603:10b6:5:3b4::22) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.3999.26 via Frontend Transport; Sat, 3 Apr 2021 23:24:16 +0000 X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-Correlation-Id: f45903a4-3d6b-41bf-e927-08d8f6f799be X-MS-TrafficTypeDiagnostic: BYAPR10MB3431: X-MS-Exchange-Transport-Forked: True X-Microsoft-Antispam-PRVS: X-MS-Oob-TLC-OOBClassifiers: OLM:8273; X-MS-Exchange-SenderADCheck: 1 X-Microsoft-Antispam: BCL:0; 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:BYAPR10MB3573.namprd10.prod.outlook.com;PTR:;CAT:NONE;SFS:(39860400002)(396003)(346002)(366004)(376002)(136003)(38100700001)(69590400012)(316002)(7416002)(478600001)(2616005)(921005)(4326008)(66476007)(6506007)(66556008)(86362001)(2906002)(6512007)(107886003)(956004)(186003)(8676002)(8936002)(6486002)(52116002)(36756003)(66946007)(1076003)(5660300002)(26005)(16526019)(83380400001);DIR:OUT;SFP:1101; X-MS-Exchange-AntiSpam-MessageData: =?us-ascii?Q?ndc8ll45rayiNaZJQ6MtUdgMG0KoZnqQoWhIaFkZ9OjzSjKosMMRF7oAVdfH?= =?us-ascii?Q?rzvYn+TNqE7nok8qkk9Bj79bsTnIwW633s+pPk+hthaZ0vpqCYYTH5bU1E2J?= =?us-ascii?Q?S1rmm/XWYZ1Ls7peKYbekihw3O8JsAqoy2gXspIt2DyV0W9r7puaNUS5z4O1?= =?us-ascii?Q?0swG5o1n5iMvIlhj6q1w6u0nLZac1WowIgrVChPMlgF/h2iH0MJhYHFVOSWD?= =?us-ascii?Q?2Bado7hmJwCz1CgDlGVwROqo8ipxeydmxsUaaFZVDo2YSWgGKUIU5dI7hZWX?= =?us-ascii?Q?iaepYdCf2MKW7EEjdlk6mrwTX0Z1UHdVflGvDEavpLByNYOSxhJjiDgRogU7?= =?us-ascii?Q?Fkm5odJfCBx+WJXIv884tUUNNclOPwu2BjYur8ctX7dwLwV9vvc/JmESABvp?= =?us-ascii?Q?rpWVw/Fkv6udaG0C3ItlmzfExyrbpYLBc9PkvSzuMmfn8ZhFnSDuUbnBwLj1?= =?us-ascii?Q?etVAQe4j/8t/BNtZqSf9c3aHAi2q2jdrvyEYTfgOP57xpU4p6W6SW1n53rNd?= =?us-ascii?Q?/o0AaOtyc4ZXL1gwNMRI5hB7764sMebeMXG/LRsaJqJEgsub83O/EKA/m2ZT?= =?us-ascii?Q?Lij3UiXqNKad/7zhQEiXVs2S/i42wrqizufYRWPgIVU5YHFKqOMormK60as3?= =?us-ascii?Q?B67phLSi2EeuQ3Pp5VMo5PlmH4bon6/ZU5ZpHQiyZjQWl1RBySwnZGTvp6Tg?= =?us-ascii?Q?ZNRNpxH8wxlS+OeCBaraU0/xnM4UScUod6OYKNpz9Q09Bk+c/reTGQw5fZwp?= =?us-ascii?Q?s70tE1ZNOX7ybkUmLZzBUlu563WHKh1BUvh/WBJ2ctfgsGop8r9yASZ93JTQ?= =?us-ascii?Q?swxG6ds4omhB6KOxVm+sREPhPpjjLg2tD6vcQaj2kmuHAMXotQq3potx0mKO?= =?us-ascii?Q?xp1btAHtOl1OPVb8ITHRhmH61OGTq0sWc6ErL6tmxVz733ByjUeml/HYUHbu?= =?us-ascii?Q?Q5qa1AF/hJTXXMS3I12xHu4CUBm8gxSWlySPxMmQX5gGnoo71wX+BOpbzUS8?= =?us-ascii?Q?uvZCOQHLyVcHV5P6N7lj9wxfCKJg/UaDLIR19aMWSr2FNaiRpDf5TDBdwN/m?= =?us-ascii?Q?Xqpo53XkG7Nuxb7zuO104p7v9tst/+k0fudauC2uEVovL7zTEbyKCt0aOw/A?= =?us-ascii?Q?6YyuYNgxoH636jFgrDLLlVR4dlspfNAIAYZQmV0cy0CxTNk4DbHxoxcLgfFy?= =?us-ascii?Q?a80T65FYNQV3HlWv/ixBKbrK6/YhANpXAGA3kpR3Q7WMW8LkACLckjbbacyF?= =?us-ascii?Q?NDq7pp0b3D4cgfGw6siJqjZNdUk8V14tInucgUK/V4a2YgCCE7Cm7I67cxOV?= =?us-ascii?Q?RtzZEOGNI2Vq2C1+KmJeUtwG?= X-OriginatorOrg: oracle.com X-MS-Exchange-CrossTenant-Network-Message-Id: f45903a4-3d6b-41bf-e927-08d8f6f799be X-MS-Exchange-CrossTenant-AuthSource: BYAPR10MB3573.namprd10.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 03 Apr 2021 23:24:17.1554 (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: Ebe7GfzeSjunINbttPzp4c4G+1MDVRwr5Y9rpp9mUzrYPEy0NLl88JyXd9HaoLN/JPI9NyWFpvFxVp7O7ikNZDcp7ojoIqlaLtQsgiBt+7k= X-MS-Exchange-Transport-CrossTenantHeadersStamped: BYAPR10MB3431 X-Proofpoint-Virus-Version: vendor=nai engine=6200 definitions=9943 signatures=668683 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 mlxlogscore=999 malwarescore=0 mlxscore=0 spamscore=0 adultscore=0 bulkscore=0 suspectscore=0 phishscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2103310000 definitions=main-2104030165 X-Proofpoint-GUID: eY4qI32CPpMRWyvDOKIKeyt61qcM1ywb X-Proofpoint-ORIG-GUID: eY4qI32CPpMRWyvDOKIKeyt61qcM1ywb X-Proofpoint-Virus-Version: vendor=nai engine=6200 definitions=9943 signatures=668683 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 bulkscore=0 clxscore=1015 priorityscore=1501 phishscore=0 spamscore=0 impostorscore=0 mlxscore=0 suspectscore=0 lowpriorityscore=0 adultscore=0 mlxlogscore=999 malwarescore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2103310000 definitions=main-2104030165 Precedence: bulk List-ID: X-Mailing-List: linux-scsi@vger.kernel.org This patch adds a new lock around the mgmt pool, so we only need the back lock for the task state which will be fixed in the next patches. Signed-off-by: Mike Christie --- drivers/scsi/libiscsi.c | 30 +++++++++++++++++++++--------- include/scsi/libiscsi.h | 8 ++++---- 2 files changed, 25 insertions(+), 13 deletions(-) diff --git a/drivers/scsi/libiscsi.c b/drivers/scsi/libiscsi.c index 00a25af9eb98..f822c0cd5927 100644 --- a/drivers/scsi/libiscsi.c +++ b/drivers/scsi/libiscsi.c @@ -462,8 +462,12 @@ static void __iscsi_free_task(struct iscsi_task *task) if (conn->login_task == task) return; - if (!sc) - kfifo_in(&session->mgmt_pool.queue, (void *)&task, sizeof(void *)); + if (sc) + return; + + spin_lock_bh(&session->mgmt_lock); + kfifo_in(&session->mgmt_pool.queue, (void *)&task, sizeof(void *)); + spin_unlock_bh(&session->mgmt_lock); } static void iscsi_free_task(struct iscsi_task *task) @@ -716,9 +720,13 @@ __iscsi_conn_send_pdu(struct iscsi_conn *conn, struct iscsi_hdr *hdr, BUG_ON(conn->c_stage == ISCSI_CONN_INITIAL_STAGE); BUG_ON(conn->c_stage == ISCSI_CONN_STOPPED); + spin_lock_bh(&session->mgmt_lock); if (!kfifo_out(&session->mgmt_pool.queue, (void *)&task, - sizeof(void *))) + sizeof(void *))) { + spin_unlock_bh(&session->mgmt_lock); return NULL; + } + spin_unlock_bh(&session->mgmt_lock); } /* * released in complete pdu for task we expect a response for, and @@ -3017,6 +3025,7 @@ iscsi_session_setup(struct iscsi_transport *iscsit, struct Scsi_Host *shost, session->dd_data = cls_session->dd_data + sizeof(*session); mutex_init(&session->eh_mutex); + spin_lock_init(&session->mgmt_lock); spin_lock_init(&session->frwd_lock); spin_lock_init(&session->back_lock); @@ -3144,13 +3153,13 @@ iscsi_conn_setup(struct iscsi_cls_session *cls_session, int dd_size, INIT_WORK(&conn->xmitwork, iscsi_xmitworker); /* allocate login_task used for the login/text sequences */ - spin_lock_bh(&session->frwd_lock); + spin_lock_bh(&session->mgmt_lock); if (!kfifo_out(&session->mgmt_pool.queue, (void *)&conn->login_task, sizeof(void *))) { - spin_unlock_bh(&session->frwd_lock); + spin_unlock_bh(&session->mgmt_lock); goto login_task_alloc_fail; } - spin_unlock_bh(&session->frwd_lock); + spin_unlock_bh(&session->mgmt_lock); data = (char *) __get_free_pages(GFP_KERNEL, get_order(ISCSI_DEF_MAX_RECV_SEG_LEN)); @@ -3164,8 +3173,10 @@ iscsi_conn_setup(struct iscsi_cls_session *cls_session, int dd_size, return cls_conn; login_task_data_alloc_fail: + spin_lock_bh(&session->mgmt_lock); kfifo_in(&session->mgmt_pool.queue, (void *)&conn->login_task, sizeof(void *)); + spin_unlock_bh(&session->mgmt_lock); login_task_alloc_fail: iscsi_destroy_conn(cls_conn); return NULL; @@ -3206,11 +3217,12 @@ void iscsi_conn_teardown(struct iscsi_cls_conn *cls_conn) get_order(ISCSI_DEF_MAX_RECV_SEG_LEN)); kfree(conn->persistent_address); kfree(conn->local_ipaddr); - /* regular RX path uses back_lock */ - spin_lock_bh(&session->back_lock); + + spin_lock_bh(&session->mgmt_lock); kfifo_in(&session->mgmt_pool.queue, (void *)&conn->login_task, sizeof(void *)); - spin_unlock_bh(&session->back_lock); + spin_unlock_bh(&session->mgmt_lock); + if (session->leadconn == conn) session->leadconn = NULL; spin_unlock_bh(&session->frwd_lock); diff --git a/include/scsi/libiscsi.h b/include/scsi/libiscsi.h index ceb01ef12002..8d1918590aa6 100644 --- a/include/scsi/libiscsi.h +++ b/include/scsi/libiscsi.h @@ -348,10 +348,9 @@ struct iscsi_session { spinlock_t frwd_lock; /* protects queued_cmdsn, * * cmdsn, suspend_bit, * * leadconn, _stage, * - * tmf_state and mgmt * - * queues */ - spinlock_t back_lock; /* protects cmdsn_exp * - * cmdsn_max, mgmt queues */ + * tmf_state and queues */ + spinlock_t back_lock; /* protects cmdsn_exp and * + * cmdsn_max */ /* * frwd_lock must be held when transitioning states, but not needed * if just checking the state in the scsi-ml or iscsi callouts. @@ -363,6 +362,7 @@ struct iscsi_session { int cmds_max; /* Total number of tasks */ struct iscsi_task **mgmt_cmds; struct iscsi_pool mgmt_pool; /* mgmt task pool */ + spinlock_t mgmt_lock; /* protects mgmt pool/arr */ void *dd_data; /* LLD private data */ }; -- 2.25.1