linux-kernel - Re: [PATCH] loop: Add LOOP_SET_FD_WITH

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Message-ID: <CAB0TPYEwOd-jYJTkq1DYp=c7uXMKvpSpgpcpZGMwW2QsYkOtSw@mail.gmail.com>
Date:   Tue, 31 Mar 2020 13:25:41 +0200
From:   Martijn Coenen <maco@...roid.com>
To:     Christoph Hellwig <hch@....de>
Cc:     Ming Lei <ming.lei@...hat.com>, Jens Axboe <axboe@...nel.dk>,
        Bart Van Assche <bvanassche@....org>,
        Chaitanya Kulkarni <Chaitanya.Kulkarni@....com>,
        linux-block <linux-block@...r.kernel.org>,
        LKML <linux-kernel@...r.kernel.org>, kernel-team@...roid.com
Subject: Re: [PATCH] loop: Add LOOP_SET_FD_WITH_OFFSET ioctl.

On Tue, Mar 31, 2020 at 9:48 AM Christoph Hellwig <hch@....de> wrote:
> I think the full blown set fd an status would seem a lot more useful,
> or even better a LOOP_CTL_ADD variant that sets up everything important
> on the character device so that we avoid the half set up block devices
> entirely.

Thanks for the feedback, I will work on that then. I think I could do
both - LOOP_SET_FD_AND_STATUS and a new variant of LOOP_CTL_ADD that
calls it - the former could still be useful if the kernel pre-created
a large amount of loop devices.

Martijn