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(No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id DB32E307D91E; Tue, 1 Oct 2019 00:24:31 +0000 (UTC) Received: from [10.18.17.165] (dhcp-17-165.bos.redhat.com [10.18.17.165]) by smtp.corp.redhat.com (Postfix) with ESMTP id 5B7B560BF1; Tue, 1 Oct 2019 00:24:31 +0000 (UTC) Subject: Re: Qemu Dirty Bitmap backup to encrypted target To: Craig Mull References: From: John Snow Autocrypt: addr=jsnow@redhat.com; prefer-encrypt=mutual; keydata= mQINBFTKefwBEAChvwqYC6saTzawbih87LqBYq0d5A8jXYXaiFMV/EvMSDqqY4EY6whXliNO IYzhgrPEe7ZmPxbCSe4iMykjhwMh5byIHDoPGDU+FsQty2KXuoxto+ZdrP9gymAgmyqdk3aV vzzmCa3cOppcqKvA0Kqr10UeX/z4OMVV390V+DVWUvzXpda45/Sxup57pk+hyY52wxxjIqef rj8u5BN93s5uCVTus0oiVA6W+iXYzTvVDStMFVqnTxSxlpZoH5RGKvmoWV3uutByQyBPHW2U 1Y6n6iEZ9MlP3hcDqlo0S8jeP03HaD4gOqCuqLceWF5+2WyHzNfylpNMFVi+Hp0H/nSDtCvQ ua7j+6Pt7q5rvqgHvRipkDDVsjqwasuNc3wyoHexrBeLU/iJBuDld5iLy+dHXoYMB3HmjMxj 3K5/8XhGrDx6BDFeO3HIpi3u2z1jniB7RtyVEtdupED6lqsDj0oSz9NxaOFZrS3Jf6z/kHIf 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Message-ID: Date: Mon, 30 Sep 2019 20:24:30 -0400 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.1.0 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8 Content-Language: en-US X-Scanned-By: MIMEDefang 2.79 on 10.5.11.12 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.48]); Tue, 01 Oct 2019 00:24:31 +0000 (UTC) Content-Transfer-Encoding: quoted-printable X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] [fuzzy] X-Received-From: 209.132.183.28 X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: qemu-devel@nongnu.org, Qemu-block , Leo Luan Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" On 9/30/19 3:26 PM, Craig Mull wrote: > How can have QEMU backup write the output=C2=A0to an encrypted target? > =C2=A0 > Blocks in the dirty bitmap are unencrypted, and as such when I write > them with QEMU backup they are written to the target unencrypted. > =C2=A0 > I've experimented with providing a json string as the target but with n= o > luck. > =C2=A0 >=20 > transaction=3D'{ "execute": "transaction",=C2=A0 >=20 > =C2=A0 "arguments": {=C2=A0 >=20 > =C2=A0 =C2=A0 "actions": [ >=20 > =C2=A0 =C2=A0 =C2=A0 {"type": "block-dirty-bitmap-add",=C2=A0 >=20 > =C2=A0=C2=A0 =C2=A0 =C2=A0 "data": {"node": "drive-virtio-disk0", "gran= ularity": 2097152, > "name": "mybitmap"} }, >=20 > =C2=A0 =C2=A0 =C2=A0 {"type": "drive-backup", >=20 > =C2=A0=C2=A0 =C2=A0 =C2=A0 "data": {"device": "drive-virtio-disk0", "ta= rget": > "json:{\"encrypt.format\": \"luks\", \"encrypt.key-secret\": > \"virtio-disk0-luks-secret0\", \"driver\": \"qcow2\", \"file\": > {\"driver\": \"file\", \"filename\": \"/tmp/target-encrypt-test.qcow2\"= }}", >=20 > =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 "sync": "full",= "format": "qcow2"} }=C2=A0 >=20 > =C2=A0 =C2=A0 ]=C2=A0 >=20 > =C2=A0 }=C2=A0 >=20 > }' >=20 > =C2=A0 >=20 > virsh -c qemu:///system qemu-monitor-command --pretty 28 $transaction >=20 > =C2=A0 >=20 > { >=20 > =C2=A0 "id": "libvirt-45", >=20 > =C2=A0 "error": { >=20 > =C2=A0 =C2=A0 "class": "GenericError", >=20 > =C2=A0 =C2=A0 "desc": "Unknown protocol 'json'" >=20 > =C2=A0 } >=20 > } >=20 > I'll be honest, I'm not very good at the json specifications and don't really know when they're appropriate to use. At the basic level, drive-backup expects a filename. Sometimes the filename can get fancy, but... I stay away from that. Try using qmp-blockdev-create to create the target node instead, and then using blockdev-backup to backup to that target. --js