linux-kernel - Re: BUG: Mount ignores mount options

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Message-ID: <alpine.LRH.2.21.1808140458040.23296@namei.org>
Date:   Tue, 14 Aug 2018 05:00:41 +1000 (AEST)
From:   James Morris <jmorris@...ei.org>
To:     Al Viro <viro@...IV.linux.org.uk>
cc:     Andy Lutomirski <luto@...nel.org>,
        Alan Cox <gnomes@...rguk.ukuu.org.uk>,
        "Theodore Y. Ts'o" <tytso@....edu>,
        David Howells <dhowells@...hat.com>,
        "Eric W. Biederman" <ebiederm@...ssion.com>,
        John Johansen <john.johansen@...onical.com>,
        Tejun Heo <tj@...nel.org>, SELinux-NSA <selinux@...ho.nsa.gov>,
        Paul Moore <paul@...l-moore.com>,
        Li Zefan <lizefan@...wei.com>,
        Linux API <linux-api@...r.kernel.org>,
        apparmor@...ts.ubuntu.com,
        Casey Schaufler <casey@...aufler-ca.com>,
        Fenghua Yu <fenghua.yu@...el.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Eric Biggers <ebiggers@...gle.com>,
        LSM List <linux-security-module@...r.kernel.org>,
        Tetsuo Handa <penguin-kernel@...ove.sakura.ne.jp>,
        Johannes Weiner <hannes@...xchg.org>,
        Stephen Smalley <sds@...ho.nsa.gov>,
        tomoyo-dev-en@...ts.sourceforge.jp,
        "open list:CONTROL GROUP (CGROUP)" <cgroups@...r.kernel.org>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        Linux FS Devel <linux-fsdevel@...r.kernel.org>,
        LKML <linux-kernel@...r.kernel.org>,
        Miklos Szeredi <miklos@...redi.hu>
Subject: Re: BUG: Mount ignores mount options

On Mon, 13 Aug 2018, Al Viro wrote:

> On Mon, Aug 13, 2018 at 09:48:53AM -0700, Andy Lutomirski wrote:

> > Are there cases I'm missing?  It sounds like the API could be improved
> > to fully model the last case, and everything will work nicely.
> 
> 	You know, that's starting to remind of this little gem of Borges:
> http://www.alamut.com/subj/artiface/language/johnWilkins.html
> Especially the delightful (fake) quote contained in there:
> [...] it is written that the animals are divided into:
> 	(a) belonging to the emperor,
> 	(b) embalmed,
> 	(c) tame,
> 	(d) sucking pigs,
> 	(e) sirens,
> 	(f) fabulous,
> 	(g) stray dogs,
> 	(h) included in the present classification,
> 	(i) frenzied,
> 	(j) innumerable,
> 	(k) drawn with a very fine camelhair brush,
> 	(l) et cetera,
> 	(m) having just broken the water pitcher,
> 	(n) that from a long way off look like flies.


Coincidentally, this was also the model for Linux capabilities.


-- 
James Morris
<jmorris@...ei.org>