Re: [Qemu-devel] [PATCH v5 7/7] block: drop support for using qcow[2] encryption with system emulators

["Daniel P. Berrange" <berrange@redhat.com>]

On Fri, Mar 18, 2016 at 01:11:27PM +0100, Kevin Wolf wrote:
> Am 17.03.2016 um 18:51 hat Daniel P. Berrange geschrieben:
> > For a couple of releases we have been warning
> > 
> >   Encrypted images are deprecated
> >   Support for them will be removed in a future release.
> >   You can use 'qemu-img convert' to convert your image to an unencrypted one.
> > 
> > This warning was issued by system emulators, qemu-img, qemu-nbd
> > and qemu-io. Such a broad warning was issued because the original
> > intention was to rip out all the code for dealing with encryption
> > inside the QEMU block layer APIs.
> > 
> > The new block encryption framework used for the LUKS driver does
> > not rely on the unloved block layer API for encryption keys,
> > instead using the QOM 'secret' object type. It is thus no longer
> > appropriate to warn about encryption unconditionally.
> > 
> > When the qcow/qcow2 drivers are converted to use the new encryption
> > framework too, it will be practical to keep AES-CBC support present
> > for use in qemu-img, qemu-io & qemu-nbd to allow for interoperability
> > with older QEMU versions and liberation of data from existing encrypted
> > qcow2 files.
> > 
> > Thus this change, removes the deprecation warning, in its place adding
> > a fatal error preventing use of qcow[2] built-in encryption inside the
> > system emulators. Use of qcow[2] encryption in qemu-img, qemu-io, qemu-nbd
> > no longer triggers any warning message, since that support is now expected
> > to remain available long term, given the maint burden has been eliminated.
> > 
> > Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
> 
> Let's do this only after the qcow2 LUKS support has been merged so that
> users have an alternative to switch to.

Ok, I'll need to respin this to just move the deprecation warning
then

Regards,
Daniel
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