linux-kernel - Re: Setting mount propagation type in new mount API

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Message-ID: <909768.1589812234@warthog.procyon.org.uk>
Date:   Mon, 18 May 2020 15:30:34 +0100
From:   David Howells <dhowells@...hat.com>
To:     mtk.manpages@...il.com
Cc:     dhowells@...hat.com, Miklos Szeredi <mszeredi@...hat.com>,
        Christian Brauner <christian.brauner@...ntu.com>,
        lkml <linux-kernel@...r.kernel.org>,
        "linux-fsdevel@...r.kernel.org" <linux-fsdevel@...r.kernel.org>,
        Petr Vorel <pvorel@...e.cz>,
        linux-man <linux-man@...r.kernel.org>
Subject: Re: Setting mount propagation type in new mount API

Michael Kerrisk (man-pages) <mtk.manpages@...il.com> wrote:

> I've been looking at the new mount API (fsopen(), fsconfig(),
> fsmount(), move_mount(), etc.) and among the details that remain
> mysterious to me is this: how does one set the propagation type
> (private/shared/slave/unbindable) of a new mount and change the
> propagation type of an existing mount?

Christian said he was going to have a go at writing mount_setattr().  It's not
trivial as it has to be able to handle AT_RECURSIVE.

David