Re: [Qemu-devel] [PATCH v11 1/3] bdrv_query_image_info Error parameter added

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

On Fri, Feb 01, 2019 at 02:42:10PM +0000, Vladimir Sementsov-Ogievskiy wrote:
> 31.01.2019 16:46, Andrey Shinkevich wrote:
> > Inform a user in case qcow2_get_specific_info fails to obtain
> > QCOW2 image specific information. This patch is preliminary to
> > the print of bitmap information in the 'qemu-img info' output.
> > 
> > Signed-off-by: Andrey Shinkevich <andrey.shinkevich@virtuozzo.com>
> > Reviewed-by: Eric Blake <eblake@redhat.com>
> > ---
> 
> 
> [...]
> 
> > --- a/block/crypto.c
> > +++ b/block/crypto.c
> > @@ -594,13 +594,13 @@ static int block_crypto_get_info_luks(BlockDriverState *bs,
> >   }
> >   
> >   static ImageInfoSpecific *
> > -block_crypto_get_specific_info_luks(BlockDriverState *bs)
> > +block_crypto_get_specific_info_luks(BlockDriverState *bs, Error **errp)
> >   {
> >       BlockCrypto *crypto = bs->opaque;
> >       ImageInfoSpecific *spec_info;
> >       QCryptoBlockInfo *info;
> >   
> > -    info = qcrypto_block_get_info(crypto->block, NULL);
> > +    info = qcrypto_block_get_info(crypto->block, errp);
> >       if (!info) {
> >           return NULL;
> >       }
> 
> more context:
> 
>        if (info->format != Q_CRYPTO_BLOCK_FORMAT_LUKS) {
>            qapi_free_QCryptoBlockInfo(info);
>            return NULL;
>        }
> 
> for a fast look, I think it should be assertion, not if, Daniel, am I right?

Sure, it could be an assertion. In practice it should never trigger
eitherway.

> Also, I think we don't have block/crypto.c in Cryptography section of MAINTAINERS
> by mistake, so you were not CC'ed.

I tend to let the block maintainers merge patches under block/,
since that's largely block layer integration. The guts of the
block crypto stuff is under crypto/


Regards,
Daniel
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