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Date:   Tue, 10 Aug 2021 16:11:25 +0200
From:   Christian Brauner <>
To:     "Michael Kerrisk (man-pages)" <>
Cc:     Alejandro Colomar <>,
        linux-fsdevel <>,
        lkml <>,
        linux-man <>,
        Christoph Hellwig <>
Subject: Re: Questions re the new mount_setattr(2) manual page

On Tue, Aug 10, 2021 at 09:12:14AM +0200, Michael Kerrisk (man-pages) wrote:
> Hi Christian,
> One more question...
> >>       The propagation field is used to specify the propagation typ
> >>       of the mount or mount tree.  Mount propagation options are
> >>       mutually exclusive; that is, the propagation values behave
> >>       like an enum.  The supported mount propagation types are:
> The manual page text doesn't actually say it, but if the 'propagation'
> field is 0, then this means leave the propagation type unchanged, 
> right? This of course should be mentioned in the manual page.

Yes, if none of the documented values is set the propagation is unchanged.


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