linux-kernel - Re: [PATCH v2 01/13] fs: export mnt_idmap_get/mnt_idmap

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Message-ID: <CAEivzxfxjWnzuVjp_Ow_ewC_MbK=wkOGbLhCbJf=GExAs2h+_w@mail.gmail.com>
Date:   Mon, 5 Jun 2023 16:06:40 +0200
From:   Aleksandr Mikhalitsyn <aleksandr.mikhalitsyn@...onical.com>
To:     Christoph Hellwig <hch@...radead.org>
Cc:     Christian Brauner <brauner@...nel.org>, xiubli@...hat.com,
        stgraber@...ntu.com, linux-fsdevel@...r.kernel.org,
        Ilya Dryomov <idryomov@...il.com>,
        Jeff Layton <jlayton@...nel.org>,
        Alexander Viro <viro@...iv.linux.org.uk>,
        Seth Forshee <sforshee@...nel.org>, ceph-devel@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 01/13] fs: export mnt_idmap_get/mnt_idmap_put

On Mon, Jun 5, 2023 at 3:53 PM Christoph Hellwig <hch@...radead.org> wrote:
>
> On Fri, Jun 02, 2023 at 02:40:27PM +0200, Christian Brauner wrote:
> > On Wed, May 24, 2023 at 05:33:03PM +0200, Alexander Mikhalitsyn wrote:
> > > These helpers are required to support idmapped mounts in the Cephfs.
> > >
> > > Signed-off-by: Alexander Mikhalitsyn <aleksandr.mikhalitsyn@...onical.com>
> > > ---
> >
> > It's fine by me to export them. The explicit contract is that _nothing
> > and absolutely nothing_ outside of core VFS code can directly peak into
> > struct mnt_idmap internals. That's the only invariant we care about.o
>
> It would be good if we could keep all these somewhat internal exports
> as EXPORT_SYMBOL_GPL, though.

Dear Christoph,

Well noticed! Thanks, I will do it.

Kind regards,
Alex

>