Re: [Qemu-devel] [PATCH v3 12/16] block/qcow2: Add qcow2_refcount_area()

[Stefan Hajnoczi <stefanha@gmail.com>]

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On Fri, May 26, 2017 at 06:55:14PM +0200, Max Reitz wrote:
> This function creates a collection of self-describing refcount
> structures (including a new refcount table) at the end of a qcow2 image
> file. Optionally, these structures can also describe a number of
> additional clusters beyond themselves; this will be important for
> preallocated truncation, which will place the data clusters and L2
> tables there.
> 
> For now, we can use this function to replace the part of
> alloc_refcount_block() that grows the refcount table (from which it is
> actually derived).
> 
> Signed-off-by: Max Reitz <mreitz@redhat.com>
> ---
>  block/qcow2.h              |   4 +
>  block/qcow2-refcount.c     | 267 +++++++++++++++++++++++++++++++--------------
>  block/qcow2.c              |  20 +++-
>  tests/qemu-iotests/044.out |   2 +-
>  4 files changed, 204 insertions(+), 89 deletions(-)

Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>

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