linux-ext4 - Re: [PATCH v2 00/39] fs: idmapped mounts

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Message-ID: <20201120091247.GA14894@infradead.org>
Date:   Fri, 20 Nov 2020 09:12:47 +0000
From:   Christoph Hellwig <hch@...radead.org>
To:     Christian Brauner <christian.brauner@...ntu.com>
Cc:     "Darrick J. Wong" <darrick.wong@...cle.com>,
        Alexander Viro <viro@...iv.linux.org.uk>,
        Christoph Hellwig <hch@...radead.org>,
        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 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.