[sheepdog] [PATCH v3] sheepdog: selectable object size support

[Hitoshi Mitake]

At Fri, 23 Jan 2015 17:24:00 +0900,
Teruaki Ishizaki wrote:
> 
> Previously, qemu block driver of sheepdog used hard-coded VDI object size.
> This patch enables users to handle "block_size_shift" value for
> calculating VDI object size.
> 
> When you start qemu, you don't need to specify additional command option.
> 
> But when you create the VDI which doesn't have default object size
> with qemu-img command, you specify block_size_shift option.
> 
> If you want to create a VDI of 8MB(1 << 23) object size,
> you need to specify following command option.
> 
>  # qemu-img create -o block_size_shift=23 sheepdog:test1 100M
> 
> In addition, when you don't specify qemu-img command option,
> a default value of sheepdog cluster is used for creating VDI.
> 
>  # qemu-img create sheepdog:test2 100M
> 
> Signed-off-by: Teruaki Ishizaki <ishizaki.teruaki at lab.ntt.co.jp>
> ---
> V3:
>  - Delete the needless operation of buffer.
>  - Delete the needless operations of request header
>    for SD_OP_GET_CLUSTER_DEFAULT.
>  - Fix coding style problems.
> 
> V2:
>  - Fix coding style problem (white space).
>  - Add members, store_policy and block_size_shift to struct SheepdogVdiReq
>  - Initialize request header to use block_size_shift specified by user.
> ---
>  block/sheepdog.c          |  140 ++++++++++++++++++++++++++++++++++++++-------
>  include/block/block_int.h |    1 +
>  2 files changed, 119 insertions(+), 22 deletions(-)

Looks good to me.
Acked-by: Hitoshi Mitake <mitake.hitoshi at lab.ntt.co.jp>

Thanks,
Hitoshi