linux-kernel - Re: [PATCH] nvme: Mark external NVMe devices as removable

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Message-ID: <CAAd53p4+WjhPM6VKZOZKQ4WcgNWjR7Eh_7Kjs1HZ_wiKov6Ctw@mail.gmail.com>
Date:   Wed, 12 Jan 2022 20:50:33 +0800
From:   Kai-Heng Feng <kai.heng.feng@...onical.com>
To:     Christoph Hellwig <hch@....de>
Cc:     kbusch@...nel.org, axboe@...com, sagi@...mberg.me,
        Rajat Jain <rajatja@...gle.com>,
        linux-nvme@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] nvme: Mark external NVMe devices as removable

On Wed, Jan 12, 2022 at 3:17 PM Christoph Hellwig <hch@....de> wrote:
>
> On Wed, Jan 12, 2022 at 09:31:54AM +0800, Kai-Heng Feng wrote:
> > Commit c037b6c818c3 ("PCI: Add sysfs "removable" attribute") can mark
> > entire Thunderbolt hierarchy as removable, if system firmware provides
> > correct attribute.
> >
> > So apply GENHD_FL_REMOVABLE for NVMe if removable bit is set, to make
> > userspace daemon like Udisks knows it can be automount.
>
> GENHD_FL_REMOVABLE means removable media as in floppies or CD-ROMs,
> which does not apply to NVMe at all.

USB thumb drives also use this flag, so I am not sure why it's not
applicable to NVMe?

Kai-Heng