linux-kernel - Re: Read-only `slaves` with shared subtrees?

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Message-ID: <CAOEu9U4enX21nxF1C3tZGFJ8zb0WKCVt_14rps4LPjJ53GQqHA@mail.gmail.com>
Date:   Wed, 20 Sep 2017 20:00:57 -0700
From:   Dawid Ciezarkiewicz <dawid.ciezarkiewicz@...rik.com>
To:     Ram Pai <linuxram@...ibm.com>
Cc:     "Eric W. Biederman" <ebiederm@...ssion.com>,
        linux-kernel@...r.kernel.org, linux-fsdevel@...r.kernel.org
Subject: Re: Read-only `slaves` with shared subtrees?

On Wed, Sep 20, 2017 at 5:39 PM, Ram Pai <linuxram@...ibm.com> wrote:
> Anyway; so something like this should be possible without breaking
> existing semantics.
>
> mount -o bind,remount,ro /mnt
> mount --make-pass-on-access  /mnt
>
> anything that gets mounted under /mnt will inherit the
> 'ro' attribute from its parent.  And when a mount-event propagates
> to a read-only-slave-mount, that new mount will automatically
> inherit the read-only attribute from its slave-parent.
>
> Dawid: will that work for you?


Yes. It is even more universal.

Regards,
Dawid Ciezarkiewicz