From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mx0a-001b2d01.pphosted.com ([148.163.156.1]:56784 "EHLO mx0a-001b2d01.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729994AbfJYQNC (ORCPT ); Fri, 25 Oct 2019 12:13:02 -0400 Received: from pps.filterd (m0098399.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.16.0.27/8.16.0.27) with SMTP id x9PG8xY7073489 for ; Fri, 25 Oct 2019 12:13:01 -0400 Received: from e06smtp03.uk.ibm.com (e06smtp03.uk.ibm.com [195.75.94.99]) by mx0a-001b2d01.pphosted.com with ESMTP id 2vv20ap5n8-1 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=NOT) for ; Fri, 25 Oct 2019 12:13:01 -0400 Received: from localhost by e06smtp03.uk.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted for from ; Fri, 25 Oct 2019 17:12:59 +0100 From: Benjamin Block Subject: [PATCH v2 08/11] zfcp: implicitly refresh config-data diagnostics when reading SysFS Date: Fri, 25 Oct 2019 18:12:50 +0200 In-Reply-To: References: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Message-Id: <60a94f55f2630b74b468fed5f39880208abb2679.1572018132.git.bblock@linux.ibm.com> Sender: linux-s390-owner@vger.kernel.org List-ID: To: "James E . J . Bottomley" , "Martin K . Petersen" Cc: Benjamin Block , Steffen Maier , Jens Remus , Fedor Loshakov , Peter Oberparleiter , Heiko Carstens , Vasily Gorbik , Christian Borntraeger , linux-scsi@vger.kernel.org, linux-s390@vger.kernel.org Adds implicit updates of cached diagnostics via Exchange Config Data when reading SysFS attributes interfacing them. Right now this only affects the new B2B-Credit diagnostic attribute. This uses the same mechanism previously also used for cached diagnostics of Exchange Port Data. Reviewed-by: Steffen Maier Signed-off-by: Benjamin Block --- drivers/s390/scsi/zfcp_diag.c | 30 ++++++++++++++++++++++++++++++ drivers/s390/scsi/zfcp_diag.h | 1 + drivers/s390/scsi/zfcp_sysfs.c | 5 +++++ 3 files changed, 36 insertions(+) diff --git a/drivers/s390/scsi/zfcp_diag.c b/drivers/s390/scsi/zfcp_diag.c index 9c5a0f3431ca..5ef7b3288c6f 100644 --- a/drivers/s390/scsi/zfcp_diag.c +++ b/drivers/s390/scsi/zfcp_diag.c @@ -176,6 +176,36 @@ int zfcp_diag_update_port_data_buffer(struct zfcp_adapter *const adapter) return rc; } +/** + * zfcp_diag_update_config_data_buffer() - Implementation of + * &typedef zfcp_diag_update_buffer_func + * to collect and update Config Data. + * @adapter: Adapter to collect Config Data from. + * + * This call is SYNCHRONOUS ! It blocks till the respective command has + * finished completely, or has failed in some way. + * + * Return: + * * 0 - Successfully retrieved new Diagnostics and Updated the buffer; + * this also includes cases where data was retrieved, but + * incomplete; you'll have to check the flag ``incomplete`` + * of &struct zfcp_diag_header. + * * see zfcp_fsf_exchange_config_data_sync() for possible error-codes ( + * excluding -EAGAIN) + */ +int zfcp_diag_update_config_data_buffer(struct zfcp_adapter *const adapter) +{ + int rc; + + rc = zfcp_fsf_exchange_config_data_sync(adapter->qdio, NULL); + if (rc == -EAGAIN) + rc = 0; /* signaling incomplete via struct zfcp_diag_header */ + + /* buffer-data was updated in zfcp_fsf_exchange_config_data_handler() */ + + return rc; +} + static int __zfcp_diag_update_buffer(struct zfcp_adapter *const adapter, struct zfcp_diag_header *const hdr, zfcp_diag_update_buffer_func buffer_update, diff --git a/drivers/s390/scsi/zfcp_diag.h b/drivers/s390/scsi/zfcp_diag.h index 7ff8fb0bb735..cf2947cd8c8f 100644 --- a/drivers/s390/scsi/zfcp_diag.h +++ b/drivers/s390/scsi/zfcp_diag.h @@ -77,6 +77,7 @@ void zfcp_diag_update_xdata(struct zfcp_diag_header *const hdr, */ typedef int (*zfcp_diag_update_buffer_func)(struct zfcp_adapter *const adapter); +int zfcp_diag_update_config_data_buffer(struct zfcp_adapter *const adapter); int zfcp_diag_update_port_data_buffer(struct zfcp_adapter *const adapter); int zfcp_diag_update_buffer_limited(struct zfcp_adapter *const adapter, struct zfcp_diag_header *const hdr, diff --git a/drivers/s390/scsi/zfcp_sysfs.c b/drivers/s390/scsi/zfcp_sysfs.c index 376d76b9f337..ae8e9137f448 100644 --- a/drivers/s390/scsi/zfcp_sysfs.c +++ b/drivers/s390/scsi/zfcp_sysfs.c @@ -687,6 +687,11 @@ static ssize_t zfcp_sysfs_adapter_diag_b2b_credit_show( diag_hdr = &adapter->diagnostics->config_data.header; + rc = zfcp_diag_update_buffer_limited( + adapter, diag_hdr, zfcp_diag_update_config_data_buffer); + if (rc != 0) + goto out; + spin_lock_irqsave(&diag_hdr->access_lock, flags); /* nport_serv_param doesn't contain the ELS_Command code */ nsp = (struct fc_els_flogi *)((unsigned long) -- 2.21.0