From patchwork Fri Sep 1 09:41:13 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Wenchao Hao X-Patchwork-Id: 719859 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 027B9CA0FE8 for ; Fri, 1 Sep 2023 09:42:10 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1348930AbjIAJmM (ORCPT ); Fri, 1 Sep 2023 05:42:12 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:56356 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1348881AbjIAJmF (ORCPT ); Fri, 1 Sep 2023 05:42:05 -0400 Received: from szxga03-in.huawei.com (szxga03-in.huawei.com [45.249.212.189]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id A975610D7; Fri, 1 Sep 2023 02:41:56 -0700 (PDT) Received: from kwepemm600012.china.huawei.com (unknown [172.30.72.55]) by szxga03-in.huawei.com (SkyGuard) with ESMTP id 4RcXz35PtczQjKk; Fri, 1 Sep 2023 17:38:39 +0800 (CST) Received: from build.huawei.com (10.175.101.6) by kwepemm600012.china.huawei.com (7.193.23.74) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2507.31; Fri, 1 Sep 2023 17:41:53 +0800 From: Wenchao Hao To: "James E . J . Bottomley" , "Martin K . Petersen" , CC: Hannes Reinecke , , , , Wenchao Hao Subject: [RFC PATCH v2 05/19] scsi: scsi_error: Add helper scsi_eh_sdev_reset to do lun reset Date: Fri, 1 Sep 2023 17:41:13 +0800 Message-ID: <20230901094127.2010873-6-haowenchao2@huawei.com> X-Mailer: git-send-email 2.32.0 In-Reply-To: <20230901094127.2010873-1-haowenchao2@huawei.com> References: <20230901094127.2010873-1-haowenchao2@huawei.com> MIME-Version: 1.0 X-Originating-IP: [10.175.101.6] X-ClientProxiedBy: dggems702-chm.china.huawei.com (10.3.19.179) To kwepemm600012.china.huawei.com (7.193.23.74) X-CFilter-Loop: Reflected Precedence: bulk List-ID: X-Mailing-List: linux-scsi@vger.kernel.org Add helper function scsi_eh_sdev_reset() to perform lun reset and check if to finish some error commands. This is preparation for a genernal LUN/target based error handle strategy and did not change original logic. Signed-off-by: Wenchao Hao --- drivers/scsi/scsi_error.c | 54 +++++++++++++++++++++++---------------- 1 file changed, 32 insertions(+), 22 deletions(-) diff --git a/drivers/scsi/scsi_error.c b/drivers/scsi/scsi_error.c index 64eb616261ec..16888540b663 100644 --- a/drivers/scsi/scsi_error.c +++ b/drivers/scsi/scsi_error.c @@ -1635,6 +1635,34 @@ static int scsi_eh_stu(struct Scsi_Host *shost, return list_empty(work_q); } +static int scsi_eh_sdev_reset(struct scsi_cmnd *scmd, + struct list_head *work_q, + struct list_head *done_q) +{ + struct scsi_cmnd *next; + struct scsi_device *sdev = scmd->device; + enum scsi_disposition rtn; + + SCSI_LOG_ERROR_RECOVERY(3, sdev_printk(KERN_INFO, sdev, + "%s: Sending BDR\n", current->comm)); + + rtn = scsi_try_bus_device_reset(scmd); + if (rtn != SUCCESS && rtn != FAST_IO_FAIL) { + SCSI_LOG_ERROR_RECOVERY(3, + sdev_printk(KERN_INFO, sdev, + "%s: BDR failed\n", current->comm)); + return 0; + } + + if (!scsi_device_online(sdev) || rtn == FAST_IO_FAIL || + !scsi_eh_tur(scmd)) + list_for_each_entry_safe(scmd, next, work_q, eh_entry) + if (scmd->device == sdev && + scsi_eh_action(scmd, rtn) != FAILED) + scsi_eh_finish_cmd(scmd, done_q); + + return list_empty(work_q); +} /** * scsi_eh_bus_device_reset - send bdr if needed @@ -1652,9 +1680,8 @@ static int scsi_eh_bus_device_reset(struct Scsi_Host *shost, struct list_head *work_q, struct list_head *done_q) { - struct scsi_cmnd *scmd, *bdr_scmd, *next; + struct scsi_cmnd *scmd, *bdr_scmd; struct scsi_device *sdev; - enum scsi_disposition rtn; shost_for_each_device(sdev, shost) { if (scsi_host_eh_past_deadline(shost)) { @@ -1675,26 +1702,9 @@ static int scsi_eh_bus_device_reset(struct Scsi_Host *shost, if (!bdr_scmd) continue; - SCSI_LOG_ERROR_RECOVERY(3, - sdev_printk(KERN_INFO, sdev, - "%s: Sending BDR\n", current->comm)); - rtn = scsi_try_bus_device_reset(bdr_scmd); - if (rtn == SUCCESS || rtn == FAST_IO_FAIL) { - if (!scsi_device_online(sdev) || - rtn == FAST_IO_FAIL || - !scsi_eh_tur(bdr_scmd)) { - list_for_each_entry_safe(scmd, next, - work_q, eh_entry) { - if (scmd->device == sdev && - scsi_eh_action(scmd, rtn) != FAILED) - scsi_eh_finish_cmd(scmd, - done_q); - } - } - } else { - SCSI_LOG_ERROR_RECOVERY(3, - sdev_printk(KERN_INFO, sdev, - "%s: BDR failed\n", current->comm)); + if (scsi_eh_sdev_reset(bdr_scmd, work_q, done_q)) { + scsi_device_put(sdev); + break; } }