From patchwork Fri Oct 2 19:39:36 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Stefan Haberland X-Patchwork-Id: 11814525 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 1B14C13B2 for ; Fri, 2 Oct 2020 19:39:49 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id F2F9F2085B for ; Fri, 2 Oct 2020 19:39:48 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=ibm.com header.i=@ibm.com header.b="WVVHzWIx" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2388374AbgJBTjs (ORCPT ); Fri, 2 Oct 2020 15:39:48 -0400 Received: from mx0b-001b2d01.pphosted.com ([148.163.158.5]:20476 "EHLO mx0b-001b2d01.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2388358AbgJBTjr (ORCPT ); Fri, 2 Oct 2020 15:39:47 -0400 Received: from pps.filterd (m0098421.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.16.0.42/8.16.0.42) with SMTP id 092JWJM0187393; Fri, 2 Oct 2020 15:39:46 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ibm.com; h=from : to : cc : subject : date : message-id : in-reply-to : references : mime-version : content-type : content-transfer-encoding; s=pp1; bh=M4kR2JhUM8XQnVN1kJ9WagYtU5PF3BlcmiwXDgUtBSc=; b=WVVHzWIxlLhZkM9zjIsUweU54wHyYYjqcouiMPxD+ZKqF8s4HLjF5YYpi9uGgVusZgYQ b60Xok30eTMq2vsfjGVR7F4zeSyPyOdc1/lHg3269nqdu8D0IrfIyM9FpLuCa6HWDQJC o3o2EpB9sDOiQRCp68uRwMiiNd8LPf+5ueAA4kHFvowh5IDvWMElx62WtfS7vAkVzlwi I/bAzb96W7Qp91Jn3w1HQF/k3MR+c9Vn7o42xEkw56hRlBUNCE3XR/oNHcPqx5eMY8qw Zo1julSE7q9wHQlwtoCJJFWrAdEHXF5Z4xc7C8+wSApznA7aL0KB1cYlirwlgsTwtzwG +w== Received: from ppma03ams.nl.ibm.com (62.31.33a9.ip4.static.sl-reverse.com [169.51.49.98]) by mx0a-001b2d01.pphosted.com with ESMTP id 33x7ha513m-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Fri, 02 Oct 2020 15:39:46 -0400 Received: from pps.filterd (ppma03ams.nl.ibm.com [127.0.0.1]) by ppma03ams.nl.ibm.com (8.16.0.42/8.16.0.42) with SMTP id 092Jbg0p030618; Fri, 2 Oct 2020 19:39:44 GMT Received: from b06cxnps4075.portsmouth.uk.ibm.com (d06relay12.portsmouth.uk.ibm.com [9.149.109.197]) by ppma03ams.nl.ibm.com with ESMTP id 33sw986vmm-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Fri, 02 Oct 2020 19:39:44 +0000 Received: from d06av21.portsmouth.uk.ibm.com (d06av21.portsmouth.uk.ibm.com [9.149.105.232]) by b06cxnps4075.portsmouth.uk.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 092JdfsW28311914 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Fri, 2 Oct 2020 19:39:41 GMT Received: from d06av21.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 6A81352052; Fri, 2 Oct 2020 19:39:41 +0000 (GMT) Received: from tuxmaker.boeblingen.de.ibm.com (unknown [9.152.85.9]) by d06av21.portsmouth.uk.ibm.com (Postfix) with ESMTPS id 6282552050; Fri, 2 Oct 2020 19:39:41 +0000 (GMT) Received: by tuxmaker.boeblingen.de.ibm.com (Postfix, from userid 20191) id B0107E0338; Fri, 2 Oct 2020 21:39:40 +0200 (CEST) From: Stefan Haberland To: axboe@kernel.dk Cc: linux-block@vger.kernel.org, hoeppner@linux.ibm.com, linux-s390@vger.kernel.org, heiko.carstens@de.ibm.com, gor@linux.ibm.com, borntraeger@de.ibm.com Subject: [PATCH 06/10] s390/dasd: Store path configuration data during path handling Date: Fri, 2 Oct 2020 21:39:36 +0200 Message-Id: <20201002193940.24012-7-sth@linux.ibm.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20201002193940.24012-1-sth@linux.ibm.com> References: <20201002193940.24012-1-sth@linux.ibm.com> MIME-Version: 1.0 X-TM-AS-GCONF: 00 X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.235,18.0.687 definitions=2020-10-02_14:2020-10-02,2020-10-02 signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 impostorscore=0 bulkscore=0 spamscore=0 priorityscore=1501 mlxlogscore=999 adultscore=0 lowpriorityscore=0 clxscore=1015 malwarescore=0 phishscore=0 mlxscore=0 suspectscore=1 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2006250000 definitions=main-2010020137 Precedence: bulk List-ID: X-Mailing-List: linux-block@vger.kernel.org From: Jan Höppner Currently, the configuration data for a path is retrieved during a path verification and used only temporarily. If a path is newly added to the I/O setup after a boot, no configuration data will be stored for this particular path. However, this data is required for later use and should be present for a valid I/O path anyway. Store this data during the path verification so that newly added paths can provide all information necessary. Reference-ID: IO1812 Signed-off-by: Jan Höppner Reviewed-by: Stefan Haberland Signed-off-by: Stefan Haberland --- drivers/s390/block/dasd_eckd.c | 11 ++++++++++- 1 file changed, 10 insertions(+), 1 deletion(-) diff --git a/drivers/s390/block/dasd_eckd.c b/drivers/s390/block/dasd_eckd.c index 497aa81778b6..274f79869b7c 100644 --- a/drivers/s390/block/dasd_eckd.c +++ b/drivers/s390/block/dasd_eckd.c @@ -1263,9 +1263,10 @@ static void do_path_verification_work(struct work_struct *work) struct dasd_uid *uid; __u8 path_rcd_buf[DASD_ECKD_RCD_DATA_SIZE]; __u8 lpm, opm, npm, ppm, epm, hpfpm, cablepm; + struct dasd_conf_data *conf_data; unsigned long flags; char print_uid[60]; - int rc; + int rc, pos; data = container_of(work, struct path_verification_work_data, worker); device = data->device; @@ -1395,6 +1396,14 @@ static void do_path_verification_work(struct work_struct *work) } } + conf_data = kzalloc(DASD_ECKD_RCD_DATA_SIZE, GFP_KERNEL); + if (conf_data) { + memcpy(conf_data, data->rcd_buffer, + DASD_ECKD_RCD_DATA_SIZE); + } + pos = pathmask_to_pos(lpm); + dasd_eckd_store_conf_data(device, conf_data, pos); + /* * There is a small chance that a path is lost again between * above path verification and the following modification of