From nobody Fri Dec 19 21:47:55 2025 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 933E3C04A95 for ; Sat, 22 Oct 2022 08:53:11 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235017AbiJVIxI (ORCPT ); Sat, 22 Oct 2022 04:53:08 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:51398 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234998AbiJVIwa (ORCPT ); Sat, 22 Oct 2022 04:52:30 -0400 Received: from ams.source.kernel.org (ams.source.kernel.org [IPv6:2604:1380:4601:e00::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id CAF542F1429; Sat, 22 Oct 2022 01:12:01 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ams.source.kernel.org (Postfix) with ESMTPS id 4F7EFB82E1C; Sat, 22 Oct 2022 07:56:43 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 9F207C433D6; Sat, 22 Oct 2022 07:56:41 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1666425402; bh=FimAQjt8rxHycJrSJpJ2hpiNp5LRScxtbelMosB/6Po=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=UsPkMC/gd2gH2lyUHrTE3EFF++mLGl0rIes3mPqkPEwCtp277QO63javXiSJgFZtB 04Pqu8CMt7uMP0yLt1yAae4giHJBTbq64+PxKCU9YvNUtnBQnjOfeU9IlEb9y1Gx1D gXRvYRCuXc0Qwsfa0tiXd4DHwZhPm8K28GbD2yVc= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Lee Duncan , Mike Christie , "Martin K. Petersen" , Sasha Levin Subject: [PATCH 5.19 459/717] scsi: iscsi: Add recv workqueue helpers Date: Sat, 22 Oct 2022 09:25:38 +0200 Message-Id: <20221022072518.601109896@linuxfoundation.org> X-Mailer: git-send-email 2.38.1 In-Reply-To: <20221022072415.034382448@linuxfoundation.org> References: <20221022072415.034382448@linuxfoundation.org> User-Agent: quilt/0.67 MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" From: Mike Christie [ Upstream commit 8af809966c0b34cfacd8da9a412689b8e9910354 ] Add helpers to allow the drivers to run their recv paths from libiscsi's workqueue. Link: https://lore.kernel.org/r/20220616224557.115234-3-michael.christie@or= acle.com Reviewed-by: Lee Duncan Signed-off-by: Mike Christie Signed-off-by: Martin K. Petersen Stable-dep-of: 57569c37f0ad ("scsi: iscsi: iscsi_tcp: Fix null-ptr-deref wh= ile calling getpeername()") Signed-off-by: Sasha Levin --- drivers/scsi/libiscsi.c | 29 +++++++++++++++++++++++++++-- include/scsi/libiscsi.h | 4 ++++ 2 files changed, 31 insertions(+), 2 deletions(-) diff --git a/drivers/scsi/libiscsi.c b/drivers/scsi/libiscsi.c index 1bd772d9b804..8f73c8d6ef22 100644 --- a/drivers/scsi/libiscsi.c +++ b/drivers/scsi/libiscsi.c @@ -93,6 +93,16 @@ inline void iscsi_conn_queue_xmit(struct iscsi_conn *con= n) } EXPORT_SYMBOL_GPL(iscsi_conn_queue_xmit); =20 +inline void iscsi_conn_queue_recv(struct iscsi_conn *conn) +{ + struct Scsi_Host *shost =3D conn->session->host; + struct iscsi_host *ihost =3D shost_priv(shost); + + if (ihost->workq && !test_bit(ISCSI_CONN_FLAG_SUSPEND_RX, &conn->flags)) + queue_work(ihost->workq, &conn->recvwork); +} +EXPORT_SYMBOL_GPL(iscsi_conn_queue_recv); + static void __iscsi_update_cmdsn(struct iscsi_session *session, uint32_t exp_cmdsn, uint32_t max_cmdsn) { @@ -1943,7 +1953,7 @@ EXPORT_SYMBOL_GPL(iscsi_suspend_queue); =20 /** * iscsi_suspend_tx - suspend iscsi_data_xmit - * @conn: iscsi conn tp stop processing IO on. + * @conn: iscsi conn to stop processing IO on. * * This function sets the suspend bit to prevent iscsi_data_xmit * from sending new IO, and if work is queued on the xmit thread @@ -1956,7 +1966,7 @@ void iscsi_suspend_tx(struct iscsi_conn *conn) =20 set_bit(ISCSI_CONN_FLAG_SUSPEND_TX, &conn->flags); if (ihost->workq) - flush_workqueue(ihost->workq); + flush_work(&conn->xmitwork); } EXPORT_SYMBOL_GPL(iscsi_suspend_tx); =20 @@ -1966,6 +1976,21 @@ static void iscsi_start_tx(struct iscsi_conn *conn) iscsi_conn_queue_xmit(conn); } =20 +/** + * iscsi_suspend_rx - Prevent recvwork from running again. + * @conn: iscsi conn to stop. + */ +void iscsi_suspend_rx(struct iscsi_conn *conn) +{ + struct Scsi_Host *shost =3D conn->session->host; + struct iscsi_host *ihost =3D shost_priv(shost); + + set_bit(ISCSI_CONN_FLAG_SUSPEND_RX, &conn->flags); + if (ihost->workq) + flush_work(&conn->recvwork); +} +EXPORT_SYMBOL_GPL(iscsi_suspend_rx); + /* * We want to make sure a ping is in flight. It has timed out. * And we are not busy processing a pdu that is making diff --git a/include/scsi/libiscsi.h b/include/scsi/libiscsi.h index 51fb0c17815e..5a10e5acfad2 100644 --- a/include/scsi/libiscsi.h +++ b/include/scsi/libiscsi.h @@ -213,6 +213,8 @@ struct iscsi_conn { struct list_head cmdqueue; /* data-path cmd queue */ struct list_head requeue; /* tasks needing another run */ struct work_struct xmitwork; /* per-conn. xmit workqueue */ + /* recv */ + struct work_struct recvwork; unsigned long flags; /* ISCSI_CONN_FLAGs */ =20 /* negotiated params */ @@ -452,8 +454,10 @@ extern int iscsi_conn_get_param(struct iscsi_cls_conn = *cls_conn, extern int iscsi_conn_get_addr_param(struct sockaddr_storage *addr, enum iscsi_param param, char *buf); extern void iscsi_suspend_tx(struct iscsi_conn *conn); +extern void iscsi_suspend_rx(struct iscsi_conn *conn); extern void iscsi_suspend_queue(struct iscsi_conn *conn); extern void iscsi_conn_queue_xmit(struct iscsi_conn *conn); +extern void iscsi_conn_queue_recv(struct iscsi_conn *conn); =20 #define iscsi_conn_printk(prefix, _c, fmt, a...) \ iscsi_cls_conn_printk(prefix, ((struct iscsi_conn *)_c)->cls_conn, \ --=20 2.35.1