linux-kernel - Re: [PATCH 0/8] MUSE: Userspace backed MTD v3

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Date:   Wed, 10 Feb 2021 12:12:03 +0100
From:   Richard Weinberger <richard.weinberger@...il.com>
To:     Miklos Szeredi <miklos@...redi.hu>
Cc:     Richard Weinberger <richard@....at>,
        Vignesh Raghavendra <vigneshr@...com>,
        fuse-devel <fuse-devel@...ts.sourceforge.net>,
        Miquel Raynal <miquel.raynal@...tlin.com>,
        linux-kernel <linux-kernel@...r.kernel.org>,
        Boris Brezillon <boris.brezillon@...labora.com>,
        linux-mtd <linux-mtd@...ts.infradead.org>,
        Ron Minnich <rminnich@...gle.com>, sven <sven@...fation.org>
Subject: Re: [PATCH 0/8] MUSE: Userspace backed MTD v3

On Wed, Feb 10, 2021 at 11:18 AM Miklos Szeredi <miklos@...redi.hu> wrote:
> > Does this more or less what you had in mind?
>
> Just moving the whole internal header file is not nice.  I did a
> mechanical public/private separation of the interface based on what
> CUSE uses.   Incremental patch attached.
>
> But this is just a start.  From the big structures still left in
> <net/fuse.h> CUSE only uses the following fields:
>
> fc: .minor, max_read, max_write, rcu, release, initialized, num_waiting
> fm: .fc
> ff: .fm
> fud: .fc
>
> Dealing with the last 3 is trivial:  create and alloc function for the
> fm, and create accessor functions for the accessed fields.

Ah, ok. So the goal is that <net/fuse.h> provides the bare minimum such that
CUSE and MUSE can reside outside of fs/fuse?

> Dealing with fc properly is probably a bit more involved, but does not
> seem to be too compex at first glance.
>
> Do you want to take a stab at cleaning this up further?

Yes. I guess for MUSE the interface needs little adaptations as well.
But I won't be able to do this for the 5.12 merge window.

-- 
Thanks,
//richard