From: Tahsin Erdogan <tahsin@google.com>
Subject: Re: xattr hash error in 4.13-rc with overlayfs over ext4
Date: Thu, 27 Jul 2017 13:54:06 -0700
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Cc: "Theodore Ts'o" <tytso@mit.edu>,
        "linux-ext4@vger.kernel.org" <linux-ext4@vger.kernel.org>,
        linux-fsdevel@vger.kernel.org, lkml <linux-kernel@vger.kernel.org>,
        "linux-unionfs@vger.kernel.org" <linux-unionfs@vger.kernel.org>
To: Miklos Szeredi <miklos@szeredi.hu>
Return-path: <linux-unionfs-owner@vger.kernel.org>
In-Reply-To: <CAJfpegtLsnDFwMFMMxUf2yUcr2AG57PgUZSAR7M8gzbOEp16Mg@mail.gmail.com>
Sender: linux-unionfs-owner@vger.kernel.org
List-Id: linux-ext4.vger.kernel.org

Still no luck reproducing the error. I am using the test script below
at v4.13-rc2. Do you mind checking my script to see what I am missing?

#!/bin/bash
set -ex

while grep /dev/sdb /proc/mounts;do umount /dev/sdb; done
mke2fs -F -t ext4 /dev/sdb
mount /dev/sdb /mnt/sdb
cd /mnt/sdb

mkdir xattrhashtest
cd xattrhashtest/
mkdir upper lower work mnt
cd lower/
echo foo > bar
ln bar baz
cd ..
mount -t overlay overlay -olowerdir=lower,upperdir=upper,workdir=work mnt
cd mnt/
echo xxx >> bar

cd /root
umount overlay
umount /dev/sdb

e2fsck -f -n /dev/sdb
echo done