From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-19.5 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 3411CC4338F for ; Mon, 26 Jul 2021 16:01:49 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 1CA0960F6E for ; Mon, 26 Jul 2021 16:01:49 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S237156AbhGZPVR (ORCPT ); Mon, 26 Jul 2021 11:21:17 -0400 Received: from mail.kernel.org ([198.145.29.99]:52308 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S236401AbhGZPLa (ORCPT ); Mon, 26 Jul 2021 11:11:30 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id 9671D60F02; Mon, 26 Jul 2021 15:51:58 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1627314719; bh=1r/UUIxhZ95sgnExU30CyJM8Jv+Y+6Rk5Z5ULUsGPWM=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Ach2KW8Jd9RNs2yIUaj5XROhhH+OpApZNs6Ct70lDocvgspwCEXIQB10nKMealBPL 9n65z/SaHATERMxd2AK3ApVLFEUg6c/RZQxJ8PLWhwm/9YiIKo3l/ML8759EG+PBLj 4xKAG/raLLNF4RP9Debz3wV+vSJohWSgzEqKTX5A= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Wu Bo , John Garry , Jason Yan , Yufen Yu , "Martin K. Petersen" , Sasha Levin Subject: [PATCH 4.19 031/120] scsi: libsas: Add LUN number check in .slave_alloc callback Date: Mon, 26 Jul 2021 17:38:03 +0200 Message-Id: <20210726153833.389483607@linuxfoundation.org> X-Mailer: git-send-email 2.32.0 In-Reply-To: <20210726153832.339431936@linuxfoundation.org> References: <20210726153832.339431936@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Yufen Yu [ Upstream commit 49da96d77938db21864dae6b7736b71e96c1d203 ] Offlining a SATA device connected to a hisi SAS controller and then scanning the host will result in detecting 255 non-existent devices: # lsscsi [2:0:0:0] disk ATA Samsung SSD 860 2B6Q /dev/sda [2:0:1:0] disk ATA WDC WD2003FYYS-3 1D01 /dev/sdb [2:0:2:0] disk SEAGATE ST600MM0006 B001 /dev/sdc # echo "offline" > /sys/block/sdb/device/state # echo "- - -" > /sys/class/scsi_host/host2/scan # lsscsi [2:0:0:0] disk ATA Samsung SSD 860 2B6Q /dev/sda [2:0:1:0] disk ATA WDC WD2003FYYS-3 1D01 /dev/sdb [2:0:1:1] disk ATA WDC WD2003FYYS-3 1D01 /dev/sdh ... [2:0:1:255] disk ATA WDC WD2003FYYS-3 1D01 /dev/sdjb After a REPORT LUN command issued to the offline device fails, the SCSI midlayer tries to do a sequential scan of all devices whose LUN number is not 0. However, SATA does not support LUN numbers at all. Introduce a generic sas_slave_alloc() handler which will return -ENXIO for SATA devices if the requested LUN number is larger than 0 and make libsas drivers use this function as their .slave_alloc callback. Link: https://lore.kernel.org/r/20210622034037.1467088-1-yuyufen@huawei.com Reported-by: Wu Bo Suggested-by: John Garry Reviewed-by: John Garry Reviewed-by: Jason Yan Signed-off-by: Yufen Yu Signed-off-by: Martin K. Petersen Signed-off-by: Sasha Levin --- drivers/scsi/aic94xx/aic94xx_init.c | 1 + drivers/scsi/hisi_sas/hisi_sas_v1_hw.c | 1 + drivers/scsi/hisi_sas/hisi_sas_v2_hw.c | 1 + drivers/scsi/hisi_sas/hisi_sas_v3_hw.c | 1 + drivers/scsi/isci/init.c | 1 + drivers/scsi/libsas/sas_scsi_host.c | 9 +++++++++ drivers/scsi/mvsas/mv_init.c | 1 + drivers/scsi/pm8001/pm8001_init.c | 1 + 8 files changed, 16 insertions(+) diff --git a/drivers/scsi/aic94xx/aic94xx_init.c b/drivers/scsi/aic94xx/aic94xx_init.c index 702da909cee5..ad8a65ab489c 100644 --- a/drivers/scsi/aic94xx/aic94xx_init.c +++ b/drivers/scsi/aic94xx/aic94xx_init.c @@ -71,6 +71,7 @@ static struct scsi_host_template aic94xx_sht = { .use_clustering = ENABLE_CLUSTERING, .eh_device_reset_handler = sas_eh_device_reset_handler, .eh_target_reset_handler = sas_eh_target_reset_handler, + .slave_alloc = sas_slave_alloc, .target_destroy = sas_target_destroy, .ioctl = sas_ioctl, .track_queue_depth = 1, diff --git a/drivers/scsi/hisi_sas/hisi_sas_v1_hw.c b/drivers/scsi/hisi_sas/hisi_sas_v1_hw.c index 8aa3222fe486..fea26edd505e 100644 --- a/drivers/scsi/hisi_sas/hisi_sas_v1_hw.c +++ b/drivers/scsi/hisi_sas/hisi_sas_v1_hw.c @@ -1814,6 +1814,7 @@ static struct scsi_host_template sht_v1_hw = { .use_clustering = ENABLE_CLUSTERING, .eh_device_reset_handler = sas_eh_device_reset_handler, .eh_target_reset_handler = sas_eh_target_reset_handler, + .slave_alloc = sas_slave_alloc, .target_destroy = sas_target_destroy, .ioctl = sas_ioctl, .shost_attrs = host_attrs, diff --git a/drivers/scsi/hisi_sas/hisi_sas_v2_hw.c b/drivers/scsi/hisi_sas/hisi_sas_v2_hw.c index ebc984ffe6a2..7be943197604 100644 --- a/drivers/scsi/hisi_sas/hisi_sas_v2_hw.c +++ b/drivers/scsi/hisi_sas/hisi_sas_v2_hw.c @@ -3565,6 +3565,7 @@ static struct scsi_host_template sht_v2_hw = { .use_clustering = ENABLE_CLUSTERING, .eh_device_reset_handler = sas_eh_device_reset_handler, .eh_target_reset_handler = sas_eh_target_reset_handler, + .slave_alloc = sas_slave_alloc, .target_destroy = sas_target_destroy, .ioctl = sas_ioctl, .shost_attrs = host_attrs, diff --git a/drivers/scsi/hisi_sas/hisi_sas_v3_hw.c b/drivers/scsi/hisi_sas/hisi_sas_v3_hw.c index ce2f232b3df3..16b7ea556118 100644 --- a/drivers/scsi/hisi_sas/hisi_sas_v3_hw.c +++ b/drivers/scsi/hisi_sas/hisi_sas_v3_hw.c @@ -2115,6 +2115,7 @@ static struct scsi_host_template sht_v3_hw = { .use_clustering = ENABLE_CLUSTERING, .eh_device_reset_handler = sas_eh_device_reset_handler, .eh_target_reset_handler = sas_eh_target_reset_handler, + .slave_alloc = sas_slave_alloc, .target_destroy = sas_target_destroy, .ioctl = sas_ioctl, .shost_attrs = host_attrs, diff --git a/drivers/scsi/isci/init.c b/drivers/scsi/isci/init.c index dde84f744313..07de94ea3819 100644 --- a/drivers/scsi/isci/init.c +++ b/drivers/scsi/isci/init.c @@ -167,6 +167,7 @@ static struct scsi_host_template isci_sht = { .eh_abort_handler = sas_eh_abort_handler, .eh_device_reset_handler = sas_eh_device_reset_handler, .eh_target_reset_handler = sas_eh_target_reset_handler, + .slave_alloc = sas_slave_alloc, .target_destroy = sas_target_destroy, .ioctl = sas_ioctl, .shost_attrs = isci_host_attrs, diff --git a/drivers/scsi/libsas/sas_scsi_host.c b/drivers/scsi/libsas/sas_scsi_host.c index 33229348dcb6..316a11183555 100644 --- a/drivers/scsi/libsas/sas_scsi_host.c +++ b/drivers/scsi/libsas/sas_scsi_host.c @@ -942,6 +942,14 @@ void sas_task_abort(struct sas_task *task) } } +int sas_slave_alloc(struct scsi_device *sdev) +{ + if (dev_is_sata(sdev_to_domain_dev(sdev)) && sdev->lun) + return -ENXIO; + + return 0; +} + void sas_target_destroy(struct scsi_target *starget) { struct domain_device *found_dev = starget->hostdata; @@ -988,5 +996,6 @@ EXPORT_SYMBOL_GPL(sas_task_abort); EXPORT_SYMBOL_GPL(sas_phy_reset); EXPORT_SYMBOL_GPL(sas_eh_device_reset_handler); EXPORT_SYMBOL_GPL(sas_eh_target_reset_handler); +EXPORT_SYMBOL_GPL(sas_slave_alloc); EXPORT_SYMBOL_GPL(sas_target_destroy); EXPORT_SYMBOL_GPL(sas_ioctl); diff --git a/drivers/scsi/mvsas/mv_init.c b/drivers/scsi/mvsas/mv_init.c index 8c91637cd598..98d6608068ab 100644 --- a/drivers/scsi/mvsas/mv_init.c +++ b/drivers/scsi/mvsas/mv_init.c @@ -62,6 +62,7 @@ static struct scsi_host_template mvs_sht = { .use_clustering = ENABLE_CLUSTERING, .eh_device_reset_handler = sas_eh_device_reset_handler, .eh_target_reset_handler = sas_eh_target_reset_handler, + .slave_alloc = sas_slave_alloc, .target_destroy = sas_target_destroy, .ioctl = sas_ioctl, .shost_attrs = mvst_host_attrs, diff --git a/drivers/scsi/pm8001/pm8001_init.c b/drivers/scsi/pm8001/pm8001_init.c index 1d59d7447a1c..9547cf516d39 100644 --- a/drivers/scsi/pm8001/pm8001_init.c +++ b/drivers/scsi/pm8001/pm8001_init.c @@ -87,6 +87,7 @@ static struct scsi_host_template pm8001_sht = { .use_clustering = ENABLE_CLUSTERING, .eh_device_reset_handler = sas_eh_device_reset_handler, .eh_target_reset_handler = sas_eh_target_reset_handler, + .slave_alloc = sas_slave_alloc, .target_destroy = sas_target_destroy, .ioctl = sas_ioctl, .shost_attrs = pm8001_host_attrs, -- 2.30.2