From patchwork Fri Feb 12 08:25:42 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Hannes Reinecke X-Patchwork-Id: 8288471 Return-Path: X-Original-To: patchwork-linux-scsi@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork2.web.kernel.org (Postfix) with ESMTP id 585E1BEEE5 for ; Fri, 12 Feb 2016 08:26:43 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 68F62203E1 for ; Fri, 12 Feb 2016 08:26:42 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 668F1203DA for ; Fri, 12 Feb 2016 08:26:41 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751578AbcBLI0f (ORCPT ); Fri, 12 Feb 2016 03:26:35 -0500 Received: from mx2.suse.de ([195.135.220.15]:52126 "EHLO mx2.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751456AbcBLIZx (ORCPT ); Fri, 12 Feb 2016 03:25:53 -0500 X-Virus-Scanned: by amavisd-new at test-mx.suse.de Received: from relay2.suse.de (charybdis-ext.suse.de [195.135.220.254]) by mx2.suse.de (Postfix) with ESMTP id 3688FADA9; Fri, 12 Feb 2016 08:25:49 +0000 (UTC) From: Hannes Reinecke To: "Martin K. Petersen" Cc: Christoph Hellwig , Bart van Assche , James Bottomley , linux-scsi@vger.kernel.org, Ewan Milne , Johannes Thumshirn , Hannes Reinecke Subject: [PATCHv6 19/23] scsi_dh: add 'rescan' callback Date: Fri, 12 Feb 2016 09:25:42 +0100 Message-Id: <1455265546-44470-20-git-send-email-hare@suse.de> X-Mailer: git-send-email 1.8.5.6 In-Reply-To: <1455265546-44470-1-git-send-email-hare@suse.de> References: <1455265546-44470-1-git-send-email-hare@suse.de> Sender: linux-scsi-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-scsi@vger.kernel.org X-Spam-Status: No, score=-7.0 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=ham version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP If a device needs to be rescanned the device_handler might need to be rechecked, too. So add a 'rescan' callback to the device handler and call it upon scsi_rescan_device(). The rescan callback will be invoked from the Unit Attention handling of ASC/ASCQ 3F 03 (INQUIRY DATA HAS CHANGED). Reviewed-by: Christoph Hellwig Signed-off-by: Hannes Reinecke --- drivers/scsi/device_handler/scsi_dh_alua.c | 8 ++++++++ drivers/scsi/scsi_lib.c | 1 + drivers/scsi/scsi_scan.c | 8 +++++++- include/scsi/scsi_dh.h | 1 + 4 files changed, 17 insertions(+), 1 deletion(-) diff --git a/drivers/scsi/device_handler/scsi_dh_alua.c b/drivers/scsi/device_handler/scsi_dh_alua.c index 35ad81f..c2841c4 100644 --- a/drivers/scsi/device_handler/scsi_dh_alua.c +++ b/drivers/scsi/device_handler/scsi_dh_alua.c @@ -1037,6 +1037,13 @@ static int alua_prep_fn(struct scsi_device *sdev, struct request *req) } +static void alua_rescan(struct scsi_device *sdev) +{ + struct alua_dh_data *h = sdev->handler_data; + + alua_initialize(sdev, h); +} + /* * alua_bus_attach - Attach device handler * @sdev: device to be attached to @@ -1097,6 +1104,7 @@ static struct scsi_device_handler alua_dh = { .prep_fn = alua_prep_fn, .check_sense = alua_check_sense, .activate = alua_activate, + .rescan = alua_rescan, .set_params = alua_set_params, }; diff --git a/drivers/scsi/scsi_lib.c b/drivers/scsi/scsi_lib.c index fa6b2c4..d46193a 100644 --- a/drivers/scsi/scsi_lib.c +++ b/drivers/scsi/scsi_lib.c @@ -2699,6 +2699,7 @@ static void scsi_evt_emit(struct scsi_device *sdev, struct scsi_event *evt) envp[idx++] = "SDEV_MEDIA_CHANGE=1"; break; case SDEV_EVT_INQUIRY_CHANGE_REPORTED: + scsi_rescan_device(&sdev->sdev_gendev); envp[idx++] = "SDEV_UA=INQUIRY_DATA_HAS_CHANGED"; break; case SDEV_EVT_CAPACITY_CHANGE_REPORTED: diff --git a/drivers/scsi/scsi_scan.c b/drivers/scsi/scsi_scan.c index 420239c..97074c9 100644 --- a/drivers/scsi/scsi_scan.c +++ b/drivers/scsi/scsi_scan.c @@ -43,6 +43,7 @@ #include #include #include +#include #include #include "scsi_priv.h" @@ -1524,9 +1525,14 @@ EXPORT_SYMBOL(scsi_add_device); void scsi_rescan_device(struct device *dev) { + struct scsi_device *sdev = to_scsi_device(dev); + device_lock(dev); - scsi_attach_vpd(to_scsi_device(dev)); + scsi_attach_vpd(sdev); + + if (sdev->handler && sdev->handler->rescan) + sdev->handler->rescan(sdev); if (dev->driver && try_module_get(dev->driver->owner)) { struct scsi_driver *drv = to_scsi_driver(dev->driver); diff --git a/include/scsi/scsi_dh.h b/include/scsi/scsi_dh.h index 7e184c6..c7bba2b 100644 --- a/include/scsi/scsi_dh.h +++ b/include/scsi/scsi_dh.h @@ -71,6 +71,7 @@ struct scsi_device_handler { int (*activate)(struct scsi_device *, activate_complete, void *); int (*prep_fn)(struct scsi_device *, struct request *); int (*set_params)(struct scsi_device *, const char *); + void (*rescan)(struct scsi_device *); }; #ifdef CONFIG_SCSI_DH