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Date:   Fri, 22 Jan 2021 18:34:40 +0100
From:   Christoph Hellwig <hch@lst.de>
To:     Christian Brauner <christian.brauner@ubuntu.com>
Cc:     Alexander Viro <viro@zeniv.linux.org.uk>,
        Christoph Hellwig <hch@lst.de>, linux-fsdevel@vger.kernel.org,
        John Johansen <john.johansen@canonical.com>,
        James Morris <jmorris@namei.org>,
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        Dmitry Kasatkin <dmitry.kasatkin@gmail.com>,
        Stephen Smalley <stephen.smalley.work@gmail.com>,
        Casey Schaufler <casey@schaufler-ca.com>,
        Arnd Bergmann <arnd@arndb.de>,
        Andreas Dilger <adilger.kernel@dilger.ca>,
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        Josh Triplett <josh@joshtriplett.org>,
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        Mauricio =?iso-8859-1?Q?V=E1squez?= Bernal 
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Subject: Re: [PATCH v6 35/40] fs: introduce MOUNT_ATTR_IDMAP
Message-ID: <20210122173440.GA20821@lst.de>
References: <20210121131959.646623-1-christian.brauner@ubuntu.com> <20210121131959.646623-36-christian.brauner@ubuntu.com> <20210122173340.GA20658@lst.de>
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On Fri, Jan 22, 2021 at 06:33:40PM +0100, Christoph Hellwig wrote:
> >  /*
> >   * mount_setattr()
> > @@ -127,9 +128,10 @@ struct mount_attr {
> >  	__u64 attr_set;
> >  	__u64 attr_clr;
> >  	__u64 propagation;
> > +	__u64 userns_fd;
> >  };
> >  
> >  /* List of all mount_attr versions. */
> > -#define MOUNT_ATTR_SIZE_VER0	24 /* sizeof first published struct */
> > +#define MOUNT_ATTR_SIZE_VER0	32 /* sizeof first published struct */
> 
> I think this hunk needs to go into the patch adding the structure.

But except for that the patch looks fine:

Reviewed-by: Christoph Hellwig <hch@lst.de>