From patchwork Mon Oct 3 20:27:21 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dmitry Bogdanov X-Patchwork-Id: 612138 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id A01FAC4332F for ; Mon, 3 Oct 2022 20:27:51 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229730AbiJCU1t (ORCPT ); Mon, 3 Oct 2022 16:27:49 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:43258 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229495AbiJCU1s (ORCPT ); Mon, 3 Oct 2022 16:27:48 -0400 Received: from mta-01.yadro.com (mta-02.yadro.com [89.207.88.252]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 98A2A303EA; Mon, 3 Oct 2022 13:27:46 -0700 (PDT) Received: from localhost (unknown [127.0.0.1]) by mta-01.yadro.com (Postfix) with ESMTP id B27E241220; Mon, 3 Oct 2022 20:27:44 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=yadro.com; h= content-type:content-type:content-transfer-encoding:mime-version :references:in-reply-to:x-mailer:message-id:date:date:subject :subject:from:from:received:received:received:received; s= mta-01; t=1664828863; x=1666643264; bh=ZFc/bde9yLuE7HUIDHaFgyP5c k6fy8KYB1sxGMvL1+U=; b=SZTQjlDW3y7yhZfxQvAT4SDwO3zlIhci4MPDgcxvD pdfIe23NIpGeZwH9QPD2yEvkxbxtls9OryAmiSKWR2LkeFPH/s7z4ua+rWMM9reo jU56Jahxqk3wzHewbBkjDJJ1yigj/UPw5Xx3Ek8WXuKL0ZLfF+eS1PPMq2Gmn+lK 0M= X-Virus-Scanned: amavisd-new at yadro.com Received: from mta-01.yadro.com ([127.0.0.1]) by localhost (mta-01.yadro.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id D8mbbN7LCgmk; Mon, 3 Oct 2022 23:27:43 +0300 (MSK) Received: from T-EXCH-01.corp.yadro.com (T-EXCH-01.corp.yadro.com [172.17.10.101]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-SHA384 (256/256 bits)) (No client certificate requested) by mta-01.yadro.com (Postfix) with ESMTPS id E1F374120A; Mon, 3 Oct 2022 23:27:36 +0300 (MSK) Received: from T-EXCH-08.corp.yadro.com (172.17.11.58) by T-EXCH-01.corp.yadro.com (172.17.10.101) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384_P384) id 15.1.669.32; Mon, 3 Oct 2022 23:27:36 +0300 Received: from NB-591.corp.yadro.com (10.199.18.20) by T-EXCH-08.corp.yadro.com (172.17.11.58) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384) id 15.2.1118.9; Mon, 3 Oct 2022 23:27:35 +0300 From: Dmitry Bogdanov To: Martin Petersen , CC: , , Duoming Zhou , Dmitry Bogdanov Subject: [PATCH 1/3] target: iscsi: schedule close_session at timeout Date: Mon, 3 Oct 2022 23:27:21 +0300 Message-ID: <20221003202723.22714-2-d.bogdanov@yadro.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20221003202723.22714-1-d.bogdanov@yadro.com> References: <20221003202723.22714-1-d.bogdanov@yadro.com> MIME-Version: 1.0 X-Originating-IP: [10.199.18.20] X-ClientProxiedBy: T-EXCH-01.corp.yadro.com (172.17.10.101) To T-EXCH-08.corp.yadro.com (172.17.11.58) Precedence: bulk List-ID: X-Mailing-List: linux-scsi@vger.kernel.org iscsit_close_session in depth has sleepable dependencies, like: iscsit_close_session() iscsit_free_connection_recovery_entries() iscsit_free_cmd() transport_generic_free_cmd() target_wait_free_cmd() wait_for_completion_timeout() But iscsit_handle_time2retain_timeout calls it in timer-context that leads to WARN on might_sleep(); Schedule iscsit_close_session in work queue. Signed-off-by: Dmitry Bogdanov --- drivers/target/iscsi/iscsi_target.c | 8 ++++++++ drivers/target/iscsi/iscsi_target.h | 1 + drivers/target/iscsi/iscsi_target_erl0.c | 4 +++- drivers/target/iscsi/iscsi_target_login.c | 1 + include/target/iscsi/iscsi_target_core.h | 1 + 5 files changed, 14 insertions(+), 1 deletion(-) diff --git a/drivers/target/iscsi/iscsi_target.c b/drivers/target/iscsi/iscsi_target.c index baf4da7bb3b4..36166eabf595 100644 --- a/drivers/target/iscsi/iscsi_target.c +++ b/drivers/target/iscsi/iscsi_target.c @@ -4495,6 +4495,14 @@ int iscsit_close_connection( } } +void iscsit_session_close_worker(struct work_struct *workp) +{ + struct iscsit_session *sess = container_of(workp, struct iscsit_session, + session_close_worker); + + iscsit_close_session(sess, true); +} + /* * If the iSCSI Session for the iSCSI Initiator Node exists, * forcefully shutdown the iSCSI NEXUS. diff --git a/drivers/target/iscsi/iscsi_target.h b/drivers/target/iscsi/iscsi_target.h index 0c997a08adec..a529294a21ce 100644 --- a/drivers/target/iscsi/iscsi_target.h +++ b/drivers/target/iscsi/iscsi_target.h @@ -42,6 +42,7 @@ extern int iscsi_target_tx_thread(void *); extern int iscsi_target_rx_thread(void *); extern int iscsit_close_connection(struct iscsit_conn *); extern int iscsit_close_session(struct iscsit_session *, bool can_sleep); +extern void iscsit_session_close_worker(struct work_struct *workp); extern void iscsit_fail_session(struct iscsit_session *); extern void iscsit_stop_session(struct iscsit_session *, int, int); extern int iscsit_release_sessions_for_tpg(struct iscsi_portal_group *, int); diff --git a/drivers/target/iscsi/iscsi_target_erl0.c b/drivers/target/iscsi/iscsi_target_erl0.c index 07e9cf431edd..63890a72555b 100644 --- a/drivers/target/iscsi/iscsi_target_erl0.c +++ b/drivers/target/iscsi/iscsi_target_erl0.c @@ -764,8 +764,10 @@ void iscsit_handle_time2retain_timeout(struct timer_list *t) " iSCSI session.\n", sess->sid); iscsit_fill_cxn_timeout_err_stats(sess); + atomic_set(&sess->session_logout, 1); spin_unlock_bh(&se_tpg->session_lock); - iscsit_close_session(sess, false); + + schedule_work(&sess->session_close_worker); } void iscsit_start_time2retain_handler(struct iscsit_session *sess) diff --git a/drivers/target/iscsi/iscsi_target_login.c b/drivers/target/iscsi/iscsi_target_login.c index 27e448c2d066..cc1895c56dd9 100644 --- a/drivers/target/iscsi/iscsi_target_login.c +++ b/drivers/target/iscsi/iscsi_target_login.c @@ -288,6 +288,7 @@ static int iscsi_login_zero_tsih_s1( spin_lock_init(&sess->cr_i_lock); spin_lock_init(&sess->session_usage_lock); spin_lock_init(&sess->ttt_lock); + INIT_WORK(&sess->session_close_worker, iscsit_session_close_worker); timer_setup(&sess->time2retain_timer, iscsit_handle_time2retain_timeout, 0); diff --git a/include/target/iscsi/iscsi_target_core.h b/include/target/iscsi/iscsi_target_core.h index 94d06ddfd80a..92436b3dd17b 100644 --- a/include/target/iscsi/iscsi_target_core.h +++ b/include/target/iscsi/iscsi_target_core.h @@ -684,6 +684,7 @@ struct iscsit_session { struct completion session_wait_comp; struct completion session_waiting_on_uc_comp; struct timer_list time2retain_timer; + struct work_struct session_close_worker; struct iscsi_sess_ops *sess_ops; struct se_session *se_sess; struct iscsi_portal_group *tpg;