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Message-ID: <ZH3o4BtG6ufXUnt1@infradead.org>
Date:   Mon, 5 Jun 2023 06:53:36 -0700
From:   Christoph Hellwig <hch@...radead.org>
To:     Christian Brauner <brauner@...nel.org>
Cc:     Alexander Mikhalitsyn <aleksandr.mikhalitsyn@...onical.com>,
        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 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.

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