From patchwork Tue Apr 2 12:38:45 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: 786116 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 2C9BB78289; Tue, 2 Apr 2024 12:39:18 +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=1712061559; cv=none; b=oB5DgqxWbVO44v5Q4lT//sv6m4FqNw1svIL4aE1kYjf+kLqKbdgeHqE4xwEf8E/gyq/L+Wf5wWUul0kPSoSe0yGDEjen01w5CHFLg3XyTIuf1zfWNLvpyuHwOZZqZjBFo+omgR9vlHwI5Jn80djZQwWjJ3/wYv3vDre9YJj5PwU= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1712061559; c=relaxed/simple; bh=x5cFsMGD/lA3hPfk3eS2pT7dUwKOv8FM7clCI0JESDk=; h=From:To:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=DrdxJm/HnOBPL3dw9snr+TwXvDpJwHTyhIejmMEYFaHqm1pleEdLGAC1kTJ7z1c802/0f0YAU4y9R5ex+zAz4O/xS0Z8qRc6iaVYY0PLzTamdmFVrM1Lil6+L9Bbsu8vIBWe13XIcNiBOTZZiJMEdS/95w34sK4R+g3BPOuDh6g= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=pYyU8iRa; 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="pYyU8iRa" Received: by smtp.kernel.org (Postfix) with ESMTPSA id B1750C43390; Tue, 2 Apr 2024 12:39:17 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1712061558; bh=x5cFsMGD/lA3hPfk3eS2pT7dUwKOv8FM7clCI0JESDk=; h=From:To:Subject:Date:In-Reply-To:References:From; b=pYyU8iRa6dmkiKARx7QqPSKiM6djIDOKqzjFQkbHuwikj6PjmlnTFXrwQoL+TSn8u XUMM1asNZpMtkQxqKC6C4pNiVJojbiBJnVtzx7JSbEPagoPbJE8+7YglHuzu4nNvhl 1AExlmLWLIfYxnKr0dpWEDWEaBuY8kCcbWc25EKLybqM464isGH8/C1HyFzQE+p/Tj gDQ0qBSqV+pdMAiJ1njW/EMKmYQn9WXJQPLrMV/5RXx4nKD4hWPm0tLjYh42HR2wut 1bInqvXX8ReotnqL/0L5CsYKiPxP+pxfkIXUwvD4eOfPy7S8jf6U8v8GA6t82tAFoM 6xyyq7zgw7E8A== 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 v4 06/28] block: Remember zone capacity when revalidating zones Date: Tue, 2 Apr 2024 21:38:45 +0900 Message-ID: <20240402123907.512027-7-dlemoal@kernel.org> X-Mailer: git-send-email 2.44.0 In-Reply-To: <20240402123907.512027-1-dlemoal@kernel.org> References: <20240402123907.512027-1-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 */