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Date:   Fri, 20 Nov 2020 12:58:44 +0100
From:   Christian Brauner <christian.brauner@...ntu.com>
To:     Christoph Hellwig <hch@...radead.org>
Cc:     "Darrick J. Wong" <darrick.wong@...cle.com>,
        Alexander Viro <viro@...iv.linux.org.uk>,
        linux-fsdevel@...r.kernel.org,
        John Johansen <john.johansen@...onical.com>,
        James Morris <jmorris@...ei.org>,
        Mimi Zohar <zohar@...ux.ibm.com>,
        Dmitry Kasatkin <dmitry.kasatkin@...il.com>,
        Stephen Smalley <stephen.smalley.work@...il.com>,
        Casey Schaufler <casey@...aufler-ca.com>,
        Arnd Bergmann <arnd@...db.de>,
        Andreas Dilger <adilger.kernel@...ger.ca>,
        OGAWA Hirofumi <hirofumi@...l.parknet.co.jp>,
        Geoffrey Thomas <geofft@...reload.com>,
        Mrunal Patel <mpatel@...hat.com>,
        Josh Triplett <josh@...htriplett.org>,
        Andy Lutomirski <luto@...nel.org>,
        Theodore Tso <tytso@....edu>, Alban Crequy <alban@...volk.io>,
        Tycho Andersen <tycho@...ho.ws>,
        David Howells <dhowells@...hat.com>,
        James Bottomley <James.Bottomley@...senpartnership.com>,
        Jann Horn <jannh@...gle.com>,
        Seth Forshee <seth.forshee@...onical.com>,
        St??phane Graber <stgraber@...ntu.com>,
        Aleksa Sarai <cyphar@...har.com>,
        Lennart Poettering <lennart@...ttering.net>,
        "Eric W. Biederman" <ebiederm@...ssion.com>, smbarber@...omium.org,
        Phil Estes <estesp@...il.com>, Serge Hallyn <serge@...lyn.com>,
        Kees Cook <keescook@...omium.org>,
        Todd Kjos <tkjos@...gle.com>, Jonathan Corbet <corbet@....net>,
        containers@...ts.linux-foundation.org,
        linux-security-module@...r.kernel.org, linux-api@...r.kernel.org,
        linux-ext4@...r.kernel.org, linux-audit@...hat.com,
        linux-integrity@...r.kernel.org, selinux@...r.kernel.org
Subject: Re: [PATCH v2 00/39] fs: idmapped mounts

On Fri, Nov 20, 2020 at 09:12:47AM +0000, Christoph Hellwig wrote:
> On Fri, Nov 20, 2020 at 10:10:44AM +0100, Christian Brauner wrote:
> > Maybe you didn't see this or you're referring to xfstests but this
> > series contains a >=4000 lines long test-suite that validates all core
> > features with and without idmapped mounts. It's the last patch in this
> > version of the series and it's located in:
> > tools/testing/selftests/idmap_mounts.
> > 
> > Everytime a filesystem is added this test-suite will be updated. We
> > would perfer if this test would be shipped with the kernel itself and
> > not in a separate test-suite such as xfstests. But we're happy to add
> > patches for the latter at some point too.
> 
> selftests is a complete pain to use, partialy because it is not
> integrated with the framework we file system developers use (xfstests)
> and partially because having the test suite in the kernel tree really
> breaks a lot of the typical use cases.  So I think we'll need to wire
> this up in the proper place instead.

Ok, I think I can basically port the test-suite at the end of this patch
series so that it can be carried in xfstests/src/idmapped_mounts.c

I'll start doing that now.
It would make it a bit easier if we could carry it as a single file for
now.

Christian

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