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

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Message-ID: <20190725192613.GF30641@bombadil.infradead.org>
Date:   Thu, 25 Jul 2019 12:26:17 -0700
From:   Matthew Wilcox <willy@...radead.org>
To:     Logan Gunthorpe <logang@...tatee.com>
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 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