linux-kernel - Re: [PATCH v6 02/16] chardev: introduce cdev_get_by

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Message-ID: <a4bb9e66-9165-3557-ae43-02a916b4fa0e@deltatee.com>
Date:   Thu, 25 Jul 2019 13:31:20 -0600
From:   Logan Gunthorpe <logang@...tatee.com>
To:     Matthew Wilcox <willy@...radead.org>
Cc:     Sagi Grimberg <sagi@...mberg.me>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Jens Axboe <axboe@...com>,
        Chaitanya Kulkarni <Chaitanya.Kulkarni@....com>,
        linux-kernel@...r.kernel.org, linux-nvme@...ts.infradead.org,
        Stephen Bates <sbates@...thlin.com>,
        linux-block@...r.kernel.org, Keith Busch <kbusch@...nel.org>,
        Alexander Viro <viro@...iv.linux.org.uk>,
        linux-fsdevel@...r.kernel.org, Max Gurtovoy <maxg@...lanox.com>,
        Christoph Hellwig <hch@....de>
Subject: Re: [PATCH v6 02/16] chardev: introduce cdev_get_by_path()



On 2019-07-25 1:26 p.m., Matthew Wilcox wrote:
> On Thu, Jul 25, 2019 at 01:24:22PM -0600, Logan Gunthorpe wrote:
>>>> Assuming that there is a open handle somewhere out there...
>>
>> Yes, that would be a step backwards from an interface. The user would
>> then need a special process to open the fd and pass it through configfs.
>> They couldn't just do it with basic bash commands.
> 
> echo 3 3</dev/nvme3 >/configfs/foor/bar/whatever

Neat. I didn't know you could do that.

Logan