linux-kernel - Re: [PATCH v2] vfs: prevent copy_file

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Date:   Thu, 18 Feb 2021 07:42:07 +0000
From:   Christoph Hellwig <hch@...radead.org>
To:     Luis Henriques <lhenriques@...e.de>
Cc:     Amir Goldstein <amir73il@...il.com>,
        Jeff Layton <jlayton@...nel.org>,
        Steve French <sfrench@...ba.org>,
        Miklos Szeredi <miklos@...redi.hu>,
        Trond Myklebust <trond.myklebust@...merspace.com>,
        Anna Schumaker <anna.schumaker@...app.com>,
        Alexander Viro <viro@...iv.linux.org.uk>,
        "Darrick J. Wong" <darrick.wong@...cle.com>,
        Dave Chinner <dchinner@...hat.com>,
        Greg KH <gregkh@...uxfoundation.org>,
        Nicolas Boichat <drinkcat@...omium.org>,
        Ian Lance Taylor <iant@...gle.com>,
        Luis Lozano <llozano@...omium.org>, ceph-devel@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-cifs@...r.kernel.org,
        samba-technical@...ts.samba.org, linux-fsdevel@...r.kernel.org,
        linux-nfs@...r.kernel.org
Subject: Re: [PATCH v2] vfs: prevent copy_file_range to copy across devices

Looks good:

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

This whole idea of cross-device copie has always been a horrible idea,
and I've been arguing against it since the patches were posted.