[sheepdog] [PATCH 3/6] sheep: add vdi_copy tree to store copies number for every VDI

[Liu Yuan]

On 08/06/2012 01:59 PM, levin li wrote:
> The normal requests from QEMU include the copies number in its header,
> QEMU stores the nr_copies the first time it reads the inode data, but
> many other local requests such as read_copy_from_replica and
> recover_object_from_replica don't know the copies number for every object,
> so this tree is necessary to keep the copies number
> 
> Signed-off-by: levin li <xingke.lwp at taobao.com>
> ---
>  sheep/Makefile.am         |    2 +-
>  sheep/object_list_cache.c |    1 +
>  sheep/ops.c               |    4 +-
>  sheep/sheep_priv.h        |    5 ++
>  sheep/vdi_copies.c        |  115 +++++++++++++++++++++++++++++++++++++++++++++

Fold vdi_copies.c into vdi.c. We should follow the general practice:
 1 standalone file for internal object concept, such as request.c,
object_cache.c, etc. So all vdi related should be placed in vdi.c. If
the concept can't be explained by one file, such as Farm, trace, we can
create a directory for it.

Thanks,
Yuan