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Fri, 18 Oct 2019 15:02:38 +0000 (UTC) Received: from dresden.str.redhat.com (unknown [10.36.118.46]) by smtp.corp.redhat.com (Postfix) with ESMTPS id 3DE011001DC0; Fri, 18 Oct 2019 15:02:37 +0000 (UTC) Subject: Re: [PATCH] blockdev: modify blockdev-change-medium to change non-removable device To: Denis Plotnikov , qemu-block@nongnu.org References: <20191018120950.26849-1-dplotnikov@virtuozzo.com> From: Max Reitz Autocrypt: addr=mreitz@redhat.com; prefer-encrypt=mutual; keydata= mQENBFXOJlcBCADEyyhOTsoa/2ujoTRAJj4MKA21dkxxELVj3cuILpLTmtachWj7QW+TVG8U /PsMCFbpwsQR7oEy8eHHZwuGQsNpEtNC2G/L8Yka0BIBzv7dEgrPzIu+W3anZXQW4702+uES U29G8TP/NGfXRRHGlbBIH9KNUnOSUD2vRtpOLXkWsV5CN6vQFYgQfFvmp5ZpPeUe6xNplu8V mcTw8OSEDW/ZnxJc8TekCKZSpdzYoxfzjm7xGmZqB18VFwgJZlIibt1HE0EB4w5GsD7x5ekh awIe3RwoZgZDLQMdOitJ1tUc8aqaxvgA4tz6J6st8D8pS//m1gAoYJWGwwIVj1DjTYLtABEB AAG0HU1heCBSZWl0eiA8bXJlaXR6QHJlZGhhdC5jb20+iQFTBBMBCAA9AhsDBQkSzAMABQsJ CAcCBhUICQoLAgQWAgMBAh4BAheABQJVzie5FRhoa3A6Ly9rZXlzLmdudXBnLm5ldAAKCRD0 B9sAYdXPQDcIB/9uNkbYEex1rHKz3mr12uxYMwLOOFY9fstP5aoVJQ1nWQVB6m2cfKGdcRe1 2/nFaHSNAzT0NnKz2MjhZVmcrpyd2Gp2QyISCfb1FbT82GMtXFj1wiHmPb3CixYmWGQUUh+I AvUqsevLA+WihgBUyaJq/vuDVM1/K9Un+w+Tz5vpeMidlIsTYhcsMhn0L9wlCjoucljvbDy/ 8C9L2DUdgi3XTa0ORKeflUhdL4gucWoAMrKX2nmPjBMKLgU7WLBc8AtV+84b9OWFML6NEyo4 4cP7cM/07VlJK53pqNg5cHtnWwjHcbpGkQvx6RUx6F1My3y52vM24rNUA3+ligVEgPYBuQEN BFXOJlcBCADAmcVUNTWT6yLWQHvxZ0o47KCP8OcLqD+67T0RCe6d0LP8GsWtrJdeDIQk+T+F xO7DolQPS6iQ6Ak2/lJaPX8L0BkEAiMuLCKFU6Bn3lFOkrQeKp3u05wCSV1iKnhg0UPji9V2 W5eNfy8F4ZQHpeGUGy+liGXlxqkeRVhLyevUqfU0WgNqAJpfhHSGpBgihUupmyUg7lfUPeRM DzAN1pIqoFuxnN+BRHdAecpsLcbR8sQddXmDg9BpSKozO/JyBmaS1RlquI8HERQoe6EynJhd 64aICHDfj61rp+/0jTIcevxIIAzW70IadoS/y3DVIkuhncgDBvGbF3aBtjrJVP+5ABEBAAGJ ASUEGAEIAA8FAlXOJlcCGwwFCRLMAwAACgkQ9AfbAGHVz0CbFwf9F/PXxQR9i4N0iipISYjU sxVdjJOM2TMut+ZZcQ6NSMvhZ0ogQxJ+iEQ5OjnIputKvPVd5U7WRh+4lF1lB/NQGrGZQ1ic alkj6ocscQyFwfib+xIe9w8TG1CVGkII7+TbS5pXHRxZH1niaRpoi/hYtgzkuOPp35jJyqT/ /ELbqQTDAWcqtJhzxKLE/ugcOMK520dJDeb6x2xVES+S5LXby0D4juZlvUj+1fwZu+7Io5+B bkhSVPb/QdOVTpnz7zWNyNw+OONo1aBUKkhq2UIByYXgORPFnbfMY7QWHcjpBVw9MgC4tGeF R4bv+1nAMMxKmb5VvQCExr0eFhJUAHAhVg== Message-ID: <2b6cc2fe-5269-71ab-9f0b-1ab36d4dc050@redhat.com> Date: Fri, 18 Oct 2019 17:02:35 +0200 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: <20191018120950.26849-1-dplotnikov@virtuozzo.com> Content-Type: multipart/signed; micalg=pgp-sha256; protocol="application/pgp-signature"; boundary="hhfUkfj6PAJ6o5XSgRXU4vczXvU0zvYwM" X-Scanned-By: MIMEDefang 2.84 on 10.5.11.22 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.6.2 (mx1.redhat.com [10.5.110.67]); Fri, 18 Oct 2019 15:02:38 +0000 (UTC) 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: kwolf@redhat.com, den@virtuozzo.com, armbru@redhat.com, qemu-devel@nongnu.org, dgilbert@redhat.com Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" This is an OpenPGP/MIME signed message (RFC 4880 and 3156) --hhfUkfj6PAJ6o5XSgRXU4vczXvU0zvYwM Content-Type: multipart/mixed; boundary="KtkVnOUoHcpNObfhPBBICctpbTba2DSXn" --KtkVnOUoHcpNObfhPBBICctpbTba2DSXn Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: quoted-printable On 18.10.19 14:09, Denis Plotnikov wrote: > The modification is useful to workaround exclusive file access restrict= ions, > e.g. to implement VM migration with shared disk stored on a storage wit= h > the exclusive file opening model: a destination VM is started waiting f= or > incomming migration with a fake image drive, and later, on the last mig= ration > phase, the fake image file is replaced with the real one. >=20 > Signed-off-by: Denis Plotnikov Isn=E2=80=99t this what we would want to use reopen for? Max --KtkVnOUoHcpNObfhPBBICctpbTba2DSXn-- --hhfUkfj6PAJ6o5XSgRXU4vczXvU0zvYwM Content-Type: application/pgp-signature; name="signature.asc" Content-Description: OpenPGP digital signature Content-Disposition: attachment; filename="signature.asc" -----BEGIN PGP SIGNATURE----- iQEzBAEBCAAdFiEEkb62CjDbPohX0Rgp9AfbAGHVz0AFAl2p1AsACgkQ9AfbAGHV z0ANQQgAkf/lBcf1MpfXv8Z2D/EZnKhzxBCPTOiqzG4sIVKt/778Wgt1SUD8pcJm p5X65DTNuBPnR60jvMddR+w4YHAXdeFA55sOyN6PW6cecSM1hJufyCWaVSTt2hZa YmOFhDCYub31ZXvELLYhLEtShfaYWwWEP1HC7cusE7ApTy7Z3asP2te8PcSEpR4U EKGySUmIhN+hsUHtjYMvVsfGAjFr0KK19TH518krbBsACMPkcc3a12rmBTp9fdHt 7+ao+Ug4hP6YQZY3G2hZaB4PNE4rEYubaknool7yw5Q9MjRTOMMam2S/8oh30mSd m2rRnD7dOvPSkK2RraBCw0H2GKfoDA== =vUPz -----END PGP SIGNATURE----- --hhfUkfj6PAJ6o5XSgRXU4vczXvU0zvYwM--