From owner-freebsd-fs@freebsd.org  Sat Jun 30 20:19:36 2018
Return-Path: <owner-freebsd-fs@freebsd.org>
Delivered-To: freebsd-fs@mailman.ysv.freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1])
 by mailman.ysv.freebsd.org (Postfix) with ESMTP id EDEBBFDA9D7
 for <freebsd-fs@mailman.ysv.freebsd.org>; Sat, 30 Jun 2018 20:19:35 +0000 (UTC)
 (envelope-from paul@mueller-blockhaus.de)
Received: from wp188.webpack.hosteurope.de (wp188.webpack.hosteurope.de
 [IPv6:2a01:488:42:1000:50ed:84c3::])
 (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits))
 (Client did not present a certificate)
 by mx1.freebsd.org (Postfix) with ESMTPS id 89B1A8B711
 for <freebsd-fs@freebsd.org>; Sat, 30 Jun 2018 20:19:35 +0000 (UTC)
 (envelope-from paul@mueller-blockhaus.de)
Received: from p54af4f56.dip0.t-ipconnect.de ([84.175.79.86]
 helo=[192.168.1.26]); authenticated
 by wp188.webpack.hosteurope.de running ExIM with esmtpsa
 (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128)
 id 1fZMLE-0003a6-0f; Sat, 30 Jun 2018 22:19:32 +0200
To: freebsd-fs@freebsd.org
From: Paul Blockhaus <paul@mueller-blockhaus.de>
Subject: Question to zfs scrub code
Message-ID: <5d2ccda7-e306-2b1b-090a-27f7ec564296@mueller-blockhaus.de>
Date: Sat, 30 Jun 2018 22:19:31 +0200
User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:52.0) Gecko/20100101
 Thunderbird/52.8.0
MIME-Version: 1.0
Content-Type: text/plain; charset=utf-8
Content-Transfer-Encoding: 7bit
X-bounce-key: webpack.hosteurope.de; paul@mueller-blockhaus.de; 1530389975;
 30a95cca; 
X-HE-SMSGID: 1fZMLE-0003a6-0f
X-BeenThere: freebsd-fs@freebsd.org
X-Mailman-Version: 2.1.27
Precedence: list
List-Id: Filesystems <freebsd-fs.freebsd.org>
List-Unsubscribe: <https://lists.freebsd.org/mailman/options/freebsd-fs>,
 <mailto:freebsd-fs-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-fs/>
List-Post: <mailto:freebsd-fs@freebsd.org>
List-Help: <mailto:freebsd-fs-request@freebsd.org?subject=help>
List-Subscribe: <https://lists.freebsd.org/mailman/listinfo/freebsd-fs>,
 <mailto:freebsd-fs-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Sat, 30 Jun 2018 20:19:36 -0000

Hello folks,

I'm not entirely shure wether this is the right place to ask, but maybe
someone can help my anyway.
I'm trying to understand how the zfs scrub code works, but I'm stuck at
dsl_scan in dsl_scan.c, it just looks like a dead end in the code.
All called functions don't seem to traverse any data blocks and just
magically end in a scrubbed pool.

What am I missing?
Is there any documentation where the scrub continues?
Or does anyone of you can explain, what happens in and after the
dsl_scan function?

Thanks in advance,
Paul