Re: [Qemu-devel] [PATCH v2 04/12] qcow2/overlaps: Protect image header

[Eric Blake]

On 11/24/2014 08:56 AM, Max Reitz wrote:
> Enter the image header into the metadata list to protect it against
> accidental modifications.
> 
> Signed-off-by: Max Reitz <address@hidden>
> ---
>  block/qcow2.c | 2 ++
>  1 file changed, 2 insertions(+)

Reviewed-by: Eric Blake <address@hidden>

> 
> diff --git a/block/qcow2.c b/block/qcow2.c
> index f80f9ed..19ac2df 100644
> --- a/block/qcow2.c
> +++ b/block/qcow2.c
> @@ -751,6 +751,8 @@ static int qcow2_open(BlockDriverState *bs, QDict 
> *options, int flags,
>          }
>      }
>  
> +    qcow2_metadata_list_enter(bs, 0, 1, QCOW2_OL_MAIN_HEADER);
> +
>      s->l2_bits = s->cluster_bits - 3; /* L2 is always one cluster */
>      s->l2_size = 1 << s->l2_bits;
>      /* 2^(s->refcount_order - 3) is the refcount width in bytes */
> 

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

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