From patchwork Wed Oct 18 17:54:33 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Bart Van Assche X-Patchwork-Id: 13427630 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 8D409CDB47E for ; Wed, 18 Oct 2023 17:57:00 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232653AbjJRR47 (ORCPT ); Wed, 18 Oct 2023 13:56:59 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:41668 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232659AbjJRR4s (ORCPT ); Wed, 18 Oct 2023 13:56:48 -0400 Received: from mail-oo1-f48.google.com (mail-oo1-f48.google.com [209.85.161.48]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 3B63B12F; Wed, 18 Oct 2023 10:56:40 -0700 (PDT) Received: by mail-oo1-f48.google.com with SMTP id 006d021491bc7-581ed744114so750129eaf.0; Wed, 18 Oct 2023 10:56:40 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1697651799; x=1698256599; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=035k58Gc0xjZLYCOymyww+e8cIPTj80YBwmkGqX/6yA=; b=eNcF/r2oh/tJYcuiuzSjJhzm35WwfZPAYuX6UZxKpOgwzfYtd95/mqyZm6q0pANpFR ghzhJrwJpBTrwe/LIir/cmpDCYZv4tj8btRypMfYf0teKEkz8MfNSeLcHzRoQ1MblUqR uUBBviUakgjQsTKekBUbuOIG53hkqn2t3Nc3Jc9mYi9nO20rah2KLPduXeyNCWLm9RaH 2dEy27CSJzAeT9jMzSCpPJVEqF3YD94w30csk65VYenIKRyXpBLXog25lhCtAvlgsVOp XtS3MlpPqy+skcfQbaqZglHi74/vSbgZAkL23z9I8P7cTCmQOak2Dkd9P0ikvAhlb1Yw fmWQ== X-Gm-Message-State: AOJu0Yw9Zf/xwpAq1XNL97BxNEc4mNqPWX2H3IPpMRZCEFF+hhQnuySY KUVTxikwXKVrV9iUz2tfYbY= X-Google-Smtp-Source: AGHT+IFwoWBuwBEsyPNdpDkTWGLbT4dcp55zLUuEJdwLdyVStxzW14WP/OWThzFA3AheRDVR8JaA9g== X-Received: by 2002:a05:6358:3a0f:b0:166:f348:a8b3 with SMTP id g15-20020a0563583a0f00b00166f348a8b3mr1954618rwe.28.1697651799305; Wed, 18 Oct 2023 10:56:39 -0700 (PDT) Received: from bvanassche-linux.mtv.corp.google.com ([2620:15c:211:201:66c1:dd00:1e1e:add3]) by smtp.gmail.com with ESMTPSA id p15-20020aa7860f000000b00690cd981652sm3628612pfn.61.2023.10.18.10.56.38 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 18 Oct 2023 10:56:38 -0700 (PDT) From: Bart Van Assche To: Jens Axboe Cc: linux-block@vger.kernel.org, linux-scsi@vger.kernel.org, "Martin K . Petersen" , Christoph Hellwig , Bart Van Assche , Douglas Gilbert , Damien Le Moal , Ming Lei , "James E.J. Bottomley" Subject: [PATCH v13 11/18] scsi: scsi_debug: Add the preserves_write_order module parameter Date: Wed, 18 Oct 2023 10:54:33 -0700 Message-ID: <20231018175602.2148415-12-bvanassche@acm.org> X-Mailer: git-send-email 2.42.0.655.g421f12c284-goog In-Reply-To: <20231018175602.2148415-1-bvanassche@acm.org> References: <20231018175602.2148415-1-bvanassche@acm.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-block@vger.kernel.org Zone write locking is not used for zoned devices if the block driver reports that it preserves the order of write commands. Make it easier to test not using zone write locking by adding support for setting the driver_preserves_write_order flag. Acked-by: Douglas Gilbert Cc: Martin K. Petersen Cc: Damien Le Moal Cc: Christoph Hellwig Cc: Ming Lei Signed-off-by: Bart Van Assche --- drivers/scsi/scsi_debug.c | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/drivers/scsi/scsi_debug.c b/drivers/scsi/scsi_debug.c index 9c0af50501f9..1ea4925d2c2f 100644 --- a/drivers/scsi/scsi_debug.c +++ b/drivers/scsi/scsi_debug.c @@ -832,6 +832,7 @@ static int dix_reads; static int dif_errors; /* ZBC global data */ +static bool sdeb_preserves_write_order; static bool sdeb_zbc_in_use; /* true for host-aware and host-managed disks */ static int sdeb_zbc_zone_cap_mb; static int sdeb_zbc_zone_size_mb; @@ -5138,9 +5139,13 @@ static struct sdebug_dev_info *find_build_dev_info(struct scsi_device *sdev) static int scsi_debug_slave_alloc(struct scsi_device *sdp) { + struct request_queue *q = sdp->request_queue; + if (sdebug_verbose) pr_info("slave_alloc <%u %u %u %llu>\n", sdp->host->host_no, sdp->channel, sdp->id, sdp->lun); + if (sdeb_preserves_write_order) + q->limits.driver_preserves_write_order = true; return 0; } @@ -5755,6 +5760,8 @@ module_param_named(statistics, sdebug_statistics, bool, S_IRUGO | S_IWUSR); module_param_named(strict, sdebug_strict, bool, S_IRUGO | S_IWUSR); module_param_named(submit_queues, submit_queues, int, S_IRUGO); module_param_named(poll_queues, poll_queues, int, S_IRUGO); +module_param_named(preserves_write_order, sdeb_preserves_write_order, bool, + S_IRUGO); module_param_named(tur_ms_to_ready, sdeb_tur_ms_to_ready, int, S_IRUGO); module_param_named(unmap_alignment, sdebug_unmap_alignment, int, S_IRUGO); module_param_named(unmap_granularity, sdebug_unmap_granularity, int, S_IRUGO); @@ -5812,6 +5819,8 @@ MODULE_PARM_DESC(ndelay, "response delay in nanoseconds (def=0 -> ignore)"); MODULE_PARM_DESC(no_lun_0, "no LU number 0 (def=0 -> have lun 0)"); MODULE_PARM_DESC(no_rwlock, "don't protect user data reads+writes (def=0)"); MODULE_PARM_DESC(no_uld, "stop ULD (e.g. sd driver) attaching (def=0))"); +MODULE_PARM_DESC(preserves_write_order, + "Whether or not to inform the block layer that this driver preserves the order of WRITE commands (def=0)"); MODULE_PARM_DESC(num_parts, "number of partitions(def=0)"); MODULE_PARM_DESC(num_tgts, "number of targets per host to simulate(def=1)"); MODULE_PARM_DESC(opt_blks, "optimal transfer length in blocks (def=1024)");