linux-kernel - Re: [PATCH] nvmet: preserve controller serial number between reboots

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Message-ID: <20170713151633.GA993@lst.de>
Date:   Thu, 13 Jul 2017 17:16:33 +0200
From:   Christoph Hellwig <hch@....de>
To:     Martin Wilck <mwilck@...e.de>
Cc:     Johannes Thumshirn <jthumshirn@...e.de>,
        Christoph Hellwig <hch@....de>,
        Sagi Grimberg <sagi@...mberg.me>,
        Keith Busch <keith.busch@...el.com>,
        Linux Kernel Mailinglist <linux-kernel@...r.kernel.org>,
        Linux NVMe Mailinglist <linux-nvme@...ts.infradead.org>
Subject: Re: [PATCH] nvmet: preserve controller serial number between
        reboots

On Thu, Jul 13, 2017 at 05:08:25PM +0200, Martin Wilck wrote:
> I'm wondering if this should be a write-once attribute. Also,
> Once the serial number has been passed on to some host (or maybe only:
> while the device is in use by some host), the attribute should probably
> be read-only.

In practive it should.  But I don't think it's worth the extra code
just to prevent people from shooting themselves into the foot.