[libvirt] [PATCH] storage: Fix capacity value for LUKS encrypted volumes

[Daniel P. Berrange]

On Fri, Mar 24, 2017 at 10:56:38AM -0400, John Ferlan wrote:
> https://bugzilla.redhat.com/show_bug.cgi?id=1371892
> 
> The 'capacity' value (e.g. guest logical size) for a LUKS volume is
> smaller than the 'physical' value of the file in the file system, so
> we need to account for that.
> 
> When peeking at the encryption information about the volume add a fetch
> of the payload_offset which is described as the offset to the start of
> the volume data (in 512 byte sectors) in QEMU's QCryptoBlockLUKSHeader.
> 
> Then adjust the ->capacity appropriately when we determine that the
> volume target encryption has a payload_offset value.
> 
> Signed-off-by: John Ferlan <jferlan at redhat.com>
> ---
>  src/storage/storage_util.c      |  3 +++
>  src/util/virstorageencryption.h |  1 +
>  src/util/virstoragefile.c       | 39 +++++++++++++++++++++++++++++++++++++++
>  3 files changed, 43 insertions(+)

ACK


Regards,
Daniel
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