Re: [Qemu-block] [Qemu-devel] [PATCH v1 08/15] block: add generic full disk encryption driver

[Eric Blake]

On 01/12/2016 11:56 AM, Daniel P. Berrange wrote:
> Add a block driver that is capable of supporting any full disk
> encryption format. This utilizes the previously added block
> encryption code, and at this time supports the LUKS format.
> 
> The driver code is capable of supporting any format supported
> by the QCryptoBlock module, so it registers one block driver
> for each format.
> 
> At this time, the "luks" driver is registered. New LUKS
> compatible volume can be formatted using qemu-img
> 
> $ qemu-img create --object secret,data=123456,id=sec0 \
>       -f luks -o key-id=sec0,cipher-alg=aes-256,\
>           cipher-mode=cbc,ivgen-alg=plain64,hash-alg=sha256 \
>       demo.luks 10G
> 

> @@ -1664,6 +1664,21 @@
>    'data': { 'file': 'BlockdevRef' } }
>  
>  ##
> +# @BlockdevOptionsLUKS
> +#
> +# Driver specific block device options for LUKS.
> +#
> +# @key-id:  #optional the ID of a QCryptoSecret object providing
> +#           the decryption key (since 2.6)
> +#
> +# Since: 2.6
> +##
> +{ 'struct': 'BlockdevOptionsLUKS',
> +  'base': 'BlockdevOptionsGenericFormat',
> +  'data': { '*key-id': 'str' } }

And if key-id is omitted, how does it work?

-- 
Eric Blake   eblake redhat com    +1-919-301-3266
Libvirt virtualization library http://libvirt.org

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