From owner-freebsd-arch@FreeBSD.ORG  Tue Dec  2 19:47:24 2014
Return-Path: <owner-freebsd-arch@FreeBSD.ORG>
Delivered-To: arch@freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org
 [IPv6:2001:1900:2254:206a::19:1])
 (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits))
 (No client certificate requested)
 by hub.freebsd.org (Postfix) with ESMTPS id 36AE2835
 for <arch@freebsd.org>; Tue,  2 Dec 2014 19:47:24 +0000 (UTC)
Received: from mail-pd0-x230.google.com (mail-pd0-x230.google.com
 [IPv6:2607:f8b0:400e:c02::230])
 (using TLSv1 with cipher ECDHE-RSA-RC4-SHA (128/128 bits))
 (Client CN "smtp.gmail.com",
 Issuer "Google Internet Authority G2" (verified OK))
 by mx1.freebsd.org (Postfix) with ESMTPS id 02D489EE
 for <arch@freebsd.org>; Tue,  2 Dec 2014 19:47:24 +0000 (UTC)
Received: by mail-pd0-f176.google.com with SMTP id y10so13790142pdj.21
 for <arch@freebsd.org>; Tue, 02 Dec 2014 11:47:23 -0800 (PST)
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113;
 h=content-type:mime-version:subject:from:in-reply-to:date:cc
 :content-transfer-encoding:message-id:references:to;
 bh=v3XYCwQOlp36pvzXOtlNIO5ewk1II5G8IQh+wgs77PM=;
 b=sxDiPjmXJzgYqR3eUBjjbssktyImbDoHjuDT+lBkW1CuX7WIsxZEE3MNmabeAcoczc
 on+TMp2a14x0oec6uOyqX5YGf2HrDTxtFOdwsae2QY/QE2/ItR2k7ydXWNmyg0cEPsdC
 P1FPOycnul7z2WIIWmAHjdv+No46sdTxUBn6uHWHgtcZ9cdp1R+2LCeeCyMNgTlaHODg
 FBJ4wjxY8RXLH4aEcpT9Dpo06upZSM5ZfDhBDwAup0rdGeU9vU3z9dNwnEwzjc+ibBLd
 yZ5b/3RD0nsWM+lpdSQ5rGe2zkMNpBFBGYlOyDcsOLOKRB0BaF32TYGxwUaTjZnj8IwF
 pLEA==
X-Received: by 10.70.92.45 with SMTP id cj13mr1529374pdb.65.1417549643322;
 Tue, 02 Dec 2014 11:47:23 -0800 (PST)
Received: from ?IPv6:2601:8:ab80:7d6:e55f:8148:485b:490e?
 ([2601:8:ab80:7d6:e55f:8148:485b:490e])
 by mx.google.com with ESMTPSA id fb7sm21143811pab.10.2014.12.02.11.47.22
 for <multiple recipients>
 (version=TLSv1 cipher=ECDHE-RSA-RC4-SHA bits=128/128);
 Tue, 02 Dec 2014 11:47:22 -0800 (PST)
Content-Type: text/plain; charset=windows-1252
Mime-Version: 1.0 (Mac OS X Mail 7.3 \(1878.6\))
Subject: Re: Remove ccd(4), et al?
From: Garrett Cooper <yanegomi@gmail.com>
In-Reply-To: <547E16CC.8080207@delphij.net>
Date: Tue, 2 Dec 2014 11:47:21 -0800
Content-Transfer-Encoding: quoted-printable
Message-Id: <93AA63B1-C18F-46B0-8987-A1029F16EB85@gmail.com>
References: <1B813BAD-907D-4087-A384-47B80C503ED9@gmail.com>
 <547E16CC.8080207@delphij.net>
To: d@delphij.net
X-Mailer: Apple Mail (2.1878.6)
Cc: "freebsd-arch@freebsd.org" <arch@FreeBSD.org>
X-BeenThere: freebsd-arch@freebsd.org
X-Mailman-Version: 2.1.18-1
Precedence: list
List-Id: Discussion related to FreeBSD architecture <freebsd-arch.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/options/freebsd-arch>,
 <mailto:freebsd-arch-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-arch/>
List-Post: <mailto:freebsd-arch@freebsd.org>
List-Help: <mailto:freebsd-arch-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-arch>,
 <mailto:freebsd-arch-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Tue, 02 Dec 2014 19:47:24 -0000

On Dec 2, 2014, at 11:45, Xin Li <delphij@delphij.net> wrote:

> Signed PGP part
> On 12/02/14 11:25, Garrett Cooper wrote:
> > Hi, I was doing some poking around, and it appears that ccd(4) is
> > currently disconnected from the kernel build but the utilities are
> > always built in userland. I was wondering if the driver is still
> > relevant, given other more flexible block-layer implementations
> > like geom_mirror, geom_raid*, zfs, etc.
>=20
> Isn't it supported via geom_ccd(4) [no manual page here]?

You=92re right, I forgot that geom modules are an additional layer =
deeper than most:

$ find /sys/modules/geom/geom_ccd/
/sys/modules/geom/geom_ccd/
/sys/modules/geom/geom_ccd/Makefile

I=92ll just add another knob in the build system for it.

Sorry for the noise / thanks for the clarity :)!=