From patchwork Thu Mar 28 00:43:46 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: 13607815 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 0563CDDBD; Thu, 28 Mar 2024 00:44:25 +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=1711586666; cv=none; b=apjuYlBIpfniBW1pyhZAXFEoeYFMLUjWbpVqIk84NPc30gusUqMWl2fDRdMHmhyt8/NUV9vksag9svzlJdPuHhQ13D4QKApznFWfB0KvnDDcvIYZDGJVIFh51nobz6E6bZkKEHO4qq5pUXFuqKa3p9ztlx/BV0rztyxdPsOoIVA= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1711586666; c=relaxed/simple; bh=x5cFsMGD/lA3hPfk3eS2pT7dUwKOv8FM7clCI0JESDk=; h=From:To:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=mEaQYDjrMcrML4l8GfTtmY/bqxaV5LQG+0oY2VjGZtZReUi6tqKf4OdkkN1vL7fOU87TQo0ZshtT8oF30Azp2XQ4Fat+72HYiGW01MIo4LCGs77n0D2Txyju2x6xU40aMeBaDIAo60RRoRwjIPmkCYd2/EKwehpOZNh9U/6p4Sk= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=Kl7NLyGO; 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="Kl7NLyGO" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 3A2E4C433F1; Thu, 28 Mar 2024 00:44:24 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1711586665; bh=x5cFsMGD/lA3hPfk3eS2pT7dUwKOv8FM7clCI0JESDk=; h=From:To:Subject:Date:In-Reply-To:References:From; b=Kl7NLyGOO/xKcL1L7YwAon0eO0A4UPWb9yYip3bwAPJ27IdfvcbMeWVxEjwSYnebI st1W5oboQZrFXYBF9QRakc4gfDWkW4qsDZQbkFByAe8Pfy6MI0IianrA1WqZGqS/nA IEPYoKcpgV/Ta2ECQq5e9dgiv+HRYplxY+GkgvEIy//3ypL6YnUFtl6xvJq2Q+KCBb Fy5/A9Toi29qcz5qa0pvhkeASBS3mCzoU2QhOXRrS9VG5Frmk1ur9liK27CZ7+67Xs EyGlV6yFZxAu/laBpktoHcBEnIoD++DmyM0FBaGTq4ACkNgY96F2n0215aYAVlWamG bos450OHuWdUQ== 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 v3 07/30] block: Remember zone capacity when revalidating zones Date: Thu, 28 Mar 2024 09:43:46 +0900 Message-ID: <20240328004409.594888-8-dlemoal@kernel.org> X-Mailer: git-send-email 2.44.0 In-Reply-To: <20240328004409.594888-1-dlemoal@kernel.org> References: <20240328004409.594888-1-dlemoal@kernel.org> Precedence: bulk X-Mailing-List: linux-scsi@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 --- 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 ec7bd7091467..4e81f714cca7 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 */