linux-kernel - Re: [RFC] AT_NO_JUMPS/LOOKUP_NO

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Message-ID: <20170502204913.GE29622@ZenIV.linux.org.uk>
Date:   Tue, 2 May 2017 21:49:13 +0100
From:   Al Viro <viro@...IV.linux.org.uk>
To:     Pavel Machek <pavel@....cz>
Cc:     Linus Torvalds <torvalds@...ux-foundation.org>,
        linux-kernel@...r.kernel.org, linux-fsdevel@...r.kernel.org
Subject: Re: [RFC] AT_NO_JUMPS/LOOKUP_NO_JUMPS

On Tue, May 02, 2017 at 09:57:40PM +0200, Pavel Machek wrote:
> On Sun 2017-03-19 17:24:15, Al Viro wrote:
> > 	Bringing back an old conversation - what do you think about the
> > potential usefulness of the following ...at() option:
> > 	* no mountpoint crossings allowed (mount --bind included)
> 
> Returning error or returning the object that should be hidden by the
> mount?

Error, obviously - as clearly said a few lines below...