From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:46939) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1X7434-00034G-1M for qemu-devel@nongnu.org; Tue, 15 Jul 2014 10:49:50 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1X742v-00050V-FC for qemu-devel@nongnu.org; Tue, 15 Jul 2014 10:49:41 -0400 Received: from garlic.mail.virginia.edu ([128.143.2.118]:52594) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1X742v-0004zs-Ac for qemu-devel@nongnu.org; Tue, 15 Jul 2014 10:49:33 -0400 Received: from localhost (localhost [127.0.0.1]) by garlic.mail.virginia.edu (Postfix) with ESMTP id 57499226078 for ; Tue, 15 Jul 2014 10:49:32 -0400 (EDT) Received: from garlic.mail.virginia.edu ([127.0.0.1]) by localhost (garlic-f.mail.virginia.edu [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id pPnYh7kgeqIN for ; Tue, 15 Jul 2014 10:49:32 -0400 (EDT) Received: from iron4.mail.virginia.edu (iron4-s.mail.virginia.edu [10.250.200.114]) by garlic.mail.virginia.edu (Postfix) with ESMTP id 3F54422602E for ; Tue, 15 Jul 2014 10:49:32 -0400 (EDT) Received: by mail-qa0-f49.google.com with SMTP id dc16so4536507qab.8 for ; Tue, 15 Jul 2014 07:49:32 -0700 (PDT) MIME-Version: 1.0 Sender: wor6c@virginia.edu Date: Tue, 15 Jul 2014 10:49:31 -0400 Message-ID: From: Wolfgang Richter Content-Type: multipart/alternative; boundary=001a113a304ef0e75304fe3c8379 Subject: [Qemu-devel] Current State of Block Filter List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel , Stefan Hajnoczi , benoit.canet@irqsave.net, Paolo Bonzini , Kevin Wolf --001a113a304ef0e75304fe3c8379 Content-Type: text/plain; charset=UTF-8 The way I see block filter currently implemented is as a special block device with `is_filter` set to true. Is this a correct characterization of the current incarnation? If so, I was wondering if it is possible to "insert" a block filter layer on top of an existing block device once QEMU is executing (via QMP commands)? It seems possible to add block filter managed block devices, but I don't think I see a way of adding a block filter to an existing block device. -- Wolf --001a113a304ef0e75304fe3c8379 Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: quoted-printable
The way I see block filter currently implemented is a= s a special block device
with `is_filter` set to true.
=
Is this a correct characterization of the current incarnatio= n?

If so, I was wondering if it is possible to "inser= t" a block filter layer on top
of an existing block device o= nce QEMU is executing (via QMP commands)?

It seems= possible to add block filter managed block devices, but I don't think<= /div>
I see a way of adding a block filter to an existing block device.

--
Wolf
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