On 05.07.2016 17:24, Colin Lord wrote:
> Isolates qcow2 probe as part of the modularization process.
> 
> Signed-off-by: Colin Lord <clord@redhat.com>
> ---
>  block/Makefile.objs   |  2 +-
>  block/probe/qcow2.c   | 16 ++++++++++++++++
>  block/qcow2.c         | 13 +------------
>  include/block/probe.h |  1 +
>  4 files changed, 19 insertions(+), 13 deletions(-)
>  create mode 100644 block/probe/qcow2.c

Reviewed-by: Max Reitz <mreitz@redhat.com>

> diff --git a/block/probe/qcow2.c b/block/probe/qcow2.c
> new file mode 100644
> index 0000000..56f4e82
> --- /dev/null
> +++ b/block/probe/qcow2.c
> @@ -0,0 +1,16 @@
> +#include "qemu/osdep.h"
> +#include "block/block_int.h"
> +#include "block/probe.h"
> +#include "block/qcow2.h"
> +
> +int qcow2_probe(const uint8_t *buf, int buf_size, const char *filename)
> +{
> +    const QCowHeader *cow_header = (const void *)buf;
> +
> +    if (buf_size >= sizeof(QCowHeader) &&
> +        be32_to_cpu(cow_header->magic) == QCOW_MAGIC &&
> +        be32_to_cpu(cow_header->version) >= 2)
> +        return 100;
> +    else
> +        return 0;

...aaand even more of this...

> +}