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Subject: Re: [PATCH 1/7] block: add a ->get_unique_id method
To:     Christoph Hellwig <hch@lst.de>, Jens Axboe <axboe@kernel.dk>,
        "Martin K. Petersen" <martin.petersen@oracle.com>
Cc:     "J. Bruce Fields" <bfields@fieldses.org>,
        Chuck Lever <chuck.lever@oracle.com>,
        linux-block@vger.kernel.org, linux-scsi@vger.kernel.org,
        target-devel@vger.kernel.org, linux-nfs@vger.kernel.org
References: <20211021060607.264371-1-hch@lst.de>
 <20211021060607.264371-2-hch@lst.de>
From:   Hannes Reinecke <hare@suse.de>
Message-ID: <0acbd09c-6c31-3413-2fb1-9d15f2ee6201@suse.de>
Date:   Thu, 21 Oct 2021 15:34:27 +0200
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On 10/21/21 8:06 AM, Christoph Hellwig wrote:
> Add a method to query unique IDs from block devices.  It will be used to
> remove code that deeply pokes into SCSI internals in the NFS server.
> The implementation in the sd driver itself is also much nicer as it can
> use the cached VPD page instead of always sending a command as the
> current NFS code does.
> 
> For now the interface is kept very minimal but could be easily
> extended when other users like a block-layer sysfs interface for
> uniquue IDs shows up.
> 
> Signed-off-by: Christoph Hellwig <hch@lst.de>
> ---
>   include/linux/blkdev.h | 11 +++++++++++
>   1 file changed, 11 insertions(+)
> 
Reviewed-by: Hannes Reinecke <hare@suse.de>

Cheers,

Hannes
-- 
Dr. Hannes Reinecke                Kernel Storage Architect
hare@suse.de                              +49 911 74053 688
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