From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:52748) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ZaS1K-0002ik-R6 for qemu-devel@nongnu.org; Fri, 11 Sep 2015 13:21:55 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1ZaS1J-0002Tj-PK for qemu-devel@nongnu.org; Fri, 11 Sep 2015 13:21:54 -0400 References: <1be64a26c9a89ff0af4c2b1299d6c8b58361644a.1441890725.git.berto@igalia.com> From: Max Reitz Message-ID: <55F30DA8.4070502@redhat.com> Date: Fri, 11 Sep 2015 19:21:44 +0200 MIME-Version: 1.0 In-Reply-To: <1be64a26c9a89ff0af4c2b1299d6c8b58361644a.1441890725.git.berto@igalia.com> Content-Type: multipart/signed; micalg=pgp-sha256; protocol="application/pgp-signature"; boundary="LHHNLjCmR3O6h86K7NTKaeH22rQS6EEjk" Subject: Re: [Qemu-devel] [PATCH v3 2/4] block: Add 'ignore-backing' field to BlockdevOptionsGenericCOWFormat List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Alberto Garcia , qemu-devel@nongnu.org Cc: Kevin Wolf , Stefan Hajnoczi , qemu-block@nongnu.org This is an OpenPGP/MIME signed message (RFC 4880 and 3156) --LHHNLjCmR3O6h86K7NTKaeH22rQS6EEjk Content-Type: text/plain; charset=iso-8859-15 Content-Transfer-Encoding: quoted-printable On 10.09.2015 15:39, Alberto Garcia wrote: > If set to true, the image will be opened with the BDRV_O_NO_BACKING > flag. This is useful for creating snapshots using images opened with > blockdev-add, since they are not supposed to have a backing image > before the operation. >=20 > Signed-off-by: Alberto Garcia > --- > block.c | 5 +++++ > qapi/block-core.json | 6 +++++- > 2 files changed, 10 insertions(+), 1 deletion(-) Ignorant of any possible previous discussion that might have taken place: The documentation for @backing says it may be set to the empty string in order to achieve exactly that. So why do we need the new flag? Because "backing: ''" is ugly? Max --LHHNLjCmR3O6h86K7NTKaeH22rQS6EEjk Content-Type: application/pgp-signature; name="signature.asc" Content-Description: OpenPGP digital signature Content-Disposition: attachment; filename="signature.asc" -----BEGIN PGP SIGNATURE----- Version: GnuPG v2 iQEcBAEBCAAGBQJV8w2oAAoJEDuxQgLoOKytXL0H/3m3waPKjMID2A1soJk1n1IK OYkFaYPNrWY9KFGh/H4V6TLy1ad6ucWSXo6QfasFQ2rH5wnP6/Mrk7OUNospb6e/ LVwMOPqaTlVFMC3YTn5FTAfwZn9JKKWVTra0axI1FEV2Z29UOeseXrkgCl9ynWb5 h+sncQMuiWld0M3tw04w1GdZTSmJI6ZjwkavzfqLcCBm3uL9XRsPieTNVJnIua9F rkzSeaHBzZinghu1eoYBiVY9C5aDE2iUjjebGqBpLL/d2r3A4QDzqItyise+sLOj 76uT3N6wh7qPGPGF+pxGFnxJm7UyBn8mqvxPD/iMiJyw6JMaQEH4/hgS/ILh4aU= =janG -----END PGP SIGNATURE----- --LHHNLjCmR3O6h86K7NTKaeH22rQS6EEjk--