From patchwork Mon Apr 8 01:41:06 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Damien Le Moal X-Patchwork-Id: 13620413 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 DD92F79F0; Mon, 8 Apr 2024 01:41:42 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1712540503; cv=none; b=YLF/kgSMkCgxpYuVlq1W+bxukydLPuWdIqSoKHbhwbf8IOkOiQeNXtyvNy/fez1d1ciLZAfbNhQn8dLNYx+lWF8cZz7SfgemXwtTuxmzIof5CvgnHzu8nFHhtMpZ6goyVRS7LcWgM6EwV75fyd9815KlRtOHvhoqgCNjneSkvaI= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1712540503; c=relaxed/simple; bh=Gc6R7atctZxWUBVqGdz/vSl7rTIqmg+BynQMw3AwliU=; h=From:To:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=XZDyU0/lXaBCTkUZ9qEBbswqMEFIrnfrGYakuccaY/X31h7pIchG7nmWQ52b1qq+wgACnyobmxwM3tgZdf6RQowUvFRhkNZ+TC9mIXH3U9d4n+sv4NScQvYLG6uzINh08FvddjxoirGrxilGk7vTl371f6Rw7RkkEc2rnLZeS5g= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=LDBmgvca; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="LDBmgvca" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 80173C43394; Mon, 8 Apr 2024 01:41:40 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1712540502; bh=Gc6R7atctZxWUBVqGdz/vSl7rTIqmg+BynQMw3AwliU=; h=From:To:Subject:Date:In-Reply-To:References:From; b=LDBmgvcaWNvNeG3+sAoZ7r5ke/FuuF9qn8gr0HFkh8YnKXsj+7g3+gCqCN6gkgWlS M0WEv8bdYT2VEkEFUYLi4I77xh4bLQfQQitsplX8smPvFGG+wlkVAQsHzaG0sHXYQp QqPQhfyqqGXA9/LJz2RnnC8ZDYml8boLnjrds9a5tuSkr6+kki0ty8O9lalvg7Rrn0 oayvW7+AJh3HOIBhOotDQl4jFH7MOh7aylTeTkD3mghl5jG3r6B2PcHUiezkCFzb9A XFcurA8w5ta/K+t71BD932LUgHsDWOUOLfhuvKP3sbhkWMUmNi3gNDmzMitrfF6pD5 gpedCsKps47Pg== From: Damien Le Moal To: linux-block@vger.kernel.org, Jens Axboe , linux-scsi@vger.kernel.org, "Martin K . Petersen" , dm-devel@lists.linux.dev, Mike Snitzer , linux-nvme@lists.infradead.org, Keith Busch , Christoph Hellwig Subject: [PATCH v7 06/28] block: Remember zone capacity when revalidating zones Date: Mon, 8 Apr 2024 10:41:06 +0900 Message-ID: <20240408014128.205141-7-dlemoal@kernel.org> X-Mailer: git-send-email 2.44.0 In-Reply-To: <20240408014128.205141-1-dlemoal@kernel.org> References: <20240408014128.205141-1-dlemoal@kernel.org> Precedence: bulk X-Mailing-List: linux-block@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 In preparation for adding zone write plugging, modify blk_revalidate_disk_zones() to get the capacity of zones of a zoned block device. This capacity value as a number of 512B sectors is stored in the gendisk zone_capacity field. Given that host-managed SMR disks (including zoned UFS drives) and all known NVMe ZNS devices have the same zone capacity for all zones blk_revalidate_disk_zones() returns an error if different capacities are detected for different zones. This also adds check to verify that the values reported by the device for zone capacities are correct, that is, that the zone capacity is never 0, does not exceed the zone size and is equal to the zone size for conventional zones. Signed-off-by: Damien Le Moal Reviewed-by: Christoph Hellwig Reviewed-by: Hannes Reinecke Reviewed-by: Bart Van Assche Tested-by: Hans Holmberg Tested-by: Dennis Maisenbacher Reviewed-by: Martin K. Petersen Reviewed-by: Johannes Thumshirn --- block/blk-zoned.c | 26 ++++++++++++++++++++++++++ include/linux/blkdev.h | 1 + 2 files changed, 27 insertions(+) diff --git a/block/blk-zoned.c b/block/blk-zoned.c index da0f4b2a8fa0..23d9bb21c459 100644 --- a/block/blk-zoned.c +++ b/block/blk-zoned.c @@ -438,6 +438,7 @@ struct blk_revalidate_zone_args { unsigned long *conv_zones_bitmap; unsigned long *seq_zones_wlock; unsigned int nr_zones; + unsigned int zone_capacity; sector_t sector; }; @@ -482,9 +483,20 @@ static int blk_revalidate_zone_cb(struct blk_zone *zone, unsigned int idx, return -ENODEV; } + if (!zone->capacity || zone->capacity > zone->len) { + pr_warn("%s: Invalid zone capacity\n", + disk->disk_name); + return -ENODEV; + } + /* Check zone type */ switch (zone->type) { case BLK_ZONE_TYPE_CONVENTIONAL: + if (zone->capacity != zone->len) { + pr_warn("%s: Invalid conventional zone capacity\n", + disk->disk_name); + return -ENODEV; + } if (!args->conv_zones_bitmap) { args->conv_zones_bitmap = blk_alloc_zone_bitmap(q->node, args->nr_zones); @@ -500,6 +512,18 @@ static int blk_revalidate_zone_cb(struct blk_zone *zone, unsigned int idx, if (!args->seq_zones_wlock) return -ENOMEM; } + + /* + * Remember the capacity of the first sequential zone and check + * if it is constant for all zones. + */ + if (!args->zone_capacity) + args->zone_capacity = zone->capacity; + if (zone->capacity != args->zone_capacity) { + pr_warn("%s: Invalid variable zone capacity\n", + disk->disk_name); + return -ENODEV; + } break; case BLK_ZONE_TYPE_SEQWRITE_PREF: default: @@ -595,6 +619,7 @@ int blk_revalidate_disk_zones(struct gendisk *disk, blk_mq_freeze_queue(q); if (ret > 0) { disk->nr_zones = args.nr_zones; + disk->zone_capacity = args.zone_capacity; swap(disk->seq_zones_wlock, args.seq_zones_wlock); swap(disk->conv_zones_bitmap, args.conv_zones_bitmap); if (update_driver_data) @@ -608,6 +633,7 @@ int blk_revalidate_disk_zones(struct gendisk *disk, kfree(args.seq_zones_wlock); kfree(args.conv_zones_bitmap); + return ret; } EXPORT_SYMBOL_GPL(blk_revalidate_disk_zones); diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h index 0380b7e6f818..7f3d85d5486b 100644 --- a/include/linux/blkdev.h +++ b/include/linux/blkdev.h @@ -191,6 +191,7 @@ struct gendisk { * blk_mq_unfreeze_queue(). */ unsigned int nr_zones; + unsigned int zone_capacity; unsigned long *conv_zones_bitmap; unsigned long *seq_zones_wlock; #endif /* CONFIG_BLK_DEV_ZONED */