From patchwork Tue Nov 14 21:16:16 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: 13455966 Received: from lindbergh.monkeyblade.net (lindbergh.monkeyblade.net [23.128.96.19]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 966682FC3F for ; Tue, 14 Nov 2023 21:18:37 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=none Received: from mail-pl1-f176.google.com (mail-pl1-f176.google.com [209.85.214.176]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 9612AF0; Tue, 14 Nov 2023 13:18:36 -0800 (PST) Received: by mail-pl1-f176.google.com with SMTP id d9443c01a7336-1cc2fc281cdso47167325ad.0; Tue, 14 Nov 2023 13:18:36 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1699996716; x=1700601516; 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=YVWi2Q1sV9spaxry37mpQP98JceOEq6IkdRxW6ewZhs=; b=QoQYuBFEoHVC4QE0z09vVrjHq9ybM9jAINOBhrDotJG1xijnOUUBkIPW3OvMSXmcN9 p3w6LJPQO5YhHOFJ3tuTQ2qyKLLrBz8h2pkyqh3/SlTDefjSC+p4PsV2Nnh5wG/y2DUL mSqrsZDlRhl83RRIk4OmsyScgtj4eJdesgmZut1ofuyFGTjvjw02f2tve+3wXnjUTHlE ay2yHoa2rSnXKGuxHiqtUm0/O0G2WOG+ztSnovsYR+WEftTCQxhSxCvSDcPNQZfNgg8g rSbXBeoXvyV8jFwZ9honwNI2dLRgF92GKubVweimaOejoaCipKyajYUuy0G6/6JDHuiG Fo5Q== X-Gm-Message-State: AOJu0YyQUo+7m89s8TQElkOcG0I7MS54Xgvg+f5SHjSLpHldaFWcMrib 3ICzb4rIgEprljmc0hOeD1M= X-Google-Smtp-Source: AGHT+IEp9+kqkeTpv4Xkg1juZDhsct2JPEvKd7Xw3fYoiyHC5+VwP3N5Q+HgdM1Q86Mj/INBMQF9vA== X-Received: by 2002:a17:902:8542:b0:1cc:ef37:664a with SMTP id d2-20020a170902854200b001ccef37664amr3088361plo.31.1699996716016; Tue, 14 Nov 2023 13:18:36 -0800 (PST) Received: from bvanassche-linux.mtv.corp.google.com ([2620:0:1000:8411:2278:ad72:cefb:4d49]) by smtp.gmail.com with ESMTPSA id ix7-20020a170902f80700b001c71ec1866fsm6169288plb.258.2023.11.14.13.18.35 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 14 Nov 2023 13:18:35 -0800 (PST) From: Bart Van Assche To: "Martin K . Petersen" Cc: linux-scsi@vger.kernel.org, linux-block@vger.kernel.org, Jens Axboe , Christoph Hellwig , Bart Van Assche , Damien Le Moal , Ming Lei , "James E.J. Bottomley" Subject: [PATCH v15 08/19] scsi: sd: Support sorting commands by LBA before resubmitting Date: Tue, 14 Nov 2023 13:16:16 -0800 Message-ID: <20231114211804.1449162-9-bvanassche@acm.org> X-Mailer: git-send-email 2.43.0.rc0.421.g78406f8d94-goog In-Reply-To: <20231114211804.1449162-1-bvanassche@acm.org> References: <20231114211804.1449162-1-bvanassche@acm.org> Precedence: bulk X-Mailing-List: linux-block@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Support sorting SCSI commands by LBA before the SCSI error handler resubmits these commands. This is necessary when resubmitting zoned writes (REQ_OP_WRITE) if multiple writes have been queued for a single zone. Reviewed-by: Damien Le Moal Cc: Martin K. Petersen Cc: Christoph Hellwig Cc: Ming Lei Signed-off-by: Bart Van Assche --- drivers/scsi/sd.c | 34 ++++++++++++++++++++++++++++++++++ 1 file changed, 34 insertions(+) diff --git a/drivers/scsi/sd.c b/drivers/scsi/sd.c index 530918cbfce2..63bb01ddadde 100644 --- a/drivers/scsi/sd.c +++ b/drivers/scsi/sd.c @@ -47,6 +47,7 @@ #include #include #include +#include #include #include #include @@ -2058,6 +2059,38 @@ static int sd_eh_action(struct scsi_cmnd *scmd, int eh_disp) return eh_disp; } +static int sd_cmp_sector(void *priv, const struct list_head *_a, + const struct list_head *_b) +{ + struct scsi_cmnd *a = list_entry(_a, typeof(*a), eh_entry); + struct scsi_cmnd *b = list_entry(_b, typeof(*b), eh_entry); + struct request *rq_a = scsi_cmd_to_rq(a); + struct request *rq_b = scsi_cmd_to_rq(b); + bool use_zwl_a = rq_a->q->limits.use_zone_write_lock; + bool use_zwl_b = rq_b->q->limits.use_zone_write_lock; + + /* + * Order the commands that need zone write locking after the commands + * that do not need zone write locking. Order the commands that do not + * need zone write locking by LBA. Do not reorder the commands that + * need zone write locking. See also the comment above the list_sort() + * definition. + */ + if (use_zwl_a || use_zwl_b) + return use_zwl_a > use_zwl_b; + return blk_rq_pos(rq_a) > blk_rq_pos(rq_b); +} + +static void sd_prepare_resubmit(struct list_head *cmd_list) +{ + /* + * Sort pending SCSI commands in starting sector order. This is + * important if one of the SCSI devices associated with @shost is a + * zoned block device for which zone write locking is disabled. + */ + list_sort(NULL, cmd_list, sd_cmp_sector); +} + static unsigned int sd_completed_bytes(struct scsi_cmnd *scmd) { struct request *req = scsi_cmd_to_rq(scmd); @@ -4014,6 +4047,7 @@ static struct scsi_driver sd_template = { .done = sd_done, .eh_action = sd_eh_action, .eh_reset = sd_eh_reset, + .eh_prepare_resubmit = sd_prepare_resubmit, }; /**