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Date:   Tue, 16 Jun 2020 15:47:41 +0200
From:   Daniel Wagner <dwagner@suse.de>
To:     Keith Busch <keith.busch@wdc.com>
Cc:     linux-nvme@lists.infradead.org, linux-block@vger.kernel.org,
        Jens Axboe <axboe@kernel.dk>,
        Damien Le Moal <damien.lemoal@wdc.com>,
        Christoph Hellwig <hch@lst.de>,
        Matias =?utf-8?B?QmrDuHJsaW5n?= <matias.bjorling@wdc.com>,
        Sagi Grimberg <sagi@grimberg.me>
Subject: Re: [PATCH 1/5] block: add capacity field to zone descriptors
Message-ID: <20200616134741.zvs55r6pga5w2pvo@beryllium.lan>
References: <20200615233424.13458-1-keith.busch@wdc.com>
 <20200615233424.13458-2-keith.busch@wdc.com>
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On Tue, Jun 16, 2020 at 08:34:20AM +0900, Keith Busch wrote:
> From: Matias Bjørling <matias.bjorling@wdc.com>
> 
> In the zoned storage model, the sectors within a zone are typically all
> writeable. With the introduction of the Zoned Namespace (ZNS) Command
> Set in the NVM Express organization, the model was extended to have a
> specific writeable capacity.
> 
> Extend the zone descriptor data structure with a zone capacity field to
> indicate to the user how many sectors in a zone are writeable.
> 
> Introduce backward compatibility in the zone report ioctl by extending
> the zone report header data structure with a flags field to indicate if
> the capacity field is available.
> 
> Signed-off-by: Matias Bjørling <matias.bjorling@wdc.com>

Reviewed-by: Daniel Wagner <dwagner@suse.de>