Re: [Qemu-devel] [PATCH v22 25/30] qmp: add x-debug-block-dirty-bitmap-sha256

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

On Fri, Jul 07, 2017 at 10:05:22AM +0200, Markus Armbruster wrote:
> Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com> writes:
> 
> > Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
> > ---
> >  block/dirty-bitmap.c         |  5 +++++
> >  blockdev.c                   | 25 +++++++++++++++++++++++++
> >  include/block/dirty-bitmap.h |  1 +
> >  include/qemu/hbitmap.h       |  8 ++++++++
> >  qapi/block-core.json         | 27 +++++++++++++++++++++++++++
> >  tests/Makefile.include       |  2 +-
> >  util/hbitmap.c               | 11 +++++++++++
> >  7 files changed, 78 insertions(+), 1 deletion(-)
> [...]
> > diff --git a/qapi/block-core.json b/qapi/block-core.json
> > index 5c42cc7790..6ad8585400 100644
> > --- a/qapi/block-core.json
> > +++ b/qapi/block-core.json
> > @@ -1644,6 +1644,33 @@
> >    'data': 'BlockDirtyBitmap' }
> >  
> >  ##
> > +# @BlockDirtyBitmapSha256:
> > +#
> > +# SHA256 hash of dirty bitmap data
> > +#
> > +# @sha256: ASCII representation of SHA256 bitmap hash
> 
> Spell it SHA-256, please.  The member name @sha256 can stay.
> 
> SHA-256 is 256 binary bits.  Please specify how they are represented in
> ASCII.  It better be base64 (RFC 4648), because we use that elsewhere.

It is filled later in this patch using qcrypto_hash_digest, so it is just
a hex string representing the hash, not base64. For the latter you can
use qcrypto_hash_base64


Regards,
Daniel
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