linux-kernel - Re: [PATCH v27 00/10] NTFS read-write driver GPL implementation by Paragon Software

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Date:   Thu, 12 Aug 2021 20:03:26 +0300
From:   Kari Argillander <kari.argillander@...il.com>
To:     Theodore Ts'o <tytso@....edu>,
        Konstantin Komarov <almaz.alexandrovich@...agon-software.com>
Cc:     "Darrick J. Wong" <djwong@...nel.org>,
        linux-fsdevel@...r.kernel.org, viro@...iv.linux.org.uk,
        linux-kernel@...r.kernel.org, pali@...nel.org, dsterba@...e.cz,
        aaptel@...e.com, willy@...radead.org, rdunlap@...radead.org,
        joe@...ches.com, mark@...mstone.com, nborisov@...e.com,
        linux-ntfs-dev@...ts.sourceforge.net, anton@...era.com,
        dan.carpenter@...cle.com, hch@....de, ebiggers@...nel.org,
        andy.lavr@...il.com, oleksandr@...alenko.name
Subject: Re: [PATCH v27 00/10] NTFS read-write driver GPL implementation by
 Paragon Software

On Sun, Aug 01, 2021 at 11:23:16PM -0400, Theodore Ts'o wrote:
> On Thu, Jul 29, 2021 at 09:24:59AM -0700, Darrick J. Wong wrote:
> > 
> > I have the same (still unanswered) questions as last time:
> > 
> > 1. What happens when you run ntfs3 through fstests with '-g all'?  I get
> > that the pass rate isn't going to be as high with ntfs3 as it is with
> > ext4/xfs/btrfs, but fstests can be adapted (see the recent attempts to
> > get exfat under test).
> 
> Indeed, it's not that hard at all.  I've included a patch to
> xfstests-bld[1] so that you can just run "kvm-xfstests -c ntfs3 -g
> auto".
> 
> Konstantin, I would *strongly* encourage you to try running fstests,
> about 60 seconds into a run, we discover that generic/013 will trigger
> locking problems that could lead to deadlocks.

It seems at least at my testing that if acl option is used then
generic/013 will pass. I have tested this with old linux-next commit
5a4cee98ea757e1a2a1354b497afdf8fafc30a20 I have still some of my own
code in it but I will test this tomorrow so I can be sure.

It also seems that acl support is broken. I also suspect ntfs-3g mkfs in
some failure cases. So maybe ntfs-3g mkfs will give different result than
Paragons mkfs. It would be nice to test with Paragons mkfs software or
that Paragon will test with ntfs-3g.