Re: [Qemu-devel] [PATCH 0/4] Split qcow2 driver

[Anthony Liguori]

Kevin Wolf wrote:
> The current qcow2 code is a monster of 3000 lines of code. This is hardly
> manageable and doesn't exactly improve the driver's structure.
>
> This patch series tries to split the driver in smaller modules. It doesn't
> contain changes to functionality or structure, especially the latter might 
> come
> later as this series makes it much clearer what the internal interfaces used 
> by
> the qcow2 driver actually are.
>
> The first three patches mainly move code around. They also build up a qcow2.h
> header file which contains the common structs and functions used by several
> modules. Some functions need to become global to keep things compilable.
>
> The fourth patch cleans up the global namespace by adding a qcow2_ prefix to
> all of the new global functions introduced by the first patches.
>
> Kevin Wolf (4):
>   qcow2: Split out refcount handling
>   qcow2: Split out guest cluster functions
>   qcow2: Split out snapshot functions
>   qcow2: Rename global functions
>   

Could you introduce a new qcow2 directory?  Perhaps add a README too
that we can use to start trying to store some information about how the
qcow2 driver works to help other people dive into it.

I think markmc had started a document at one point, right?

>  Makefile               |    4 +-
>  block/qcow2-cluster.c  |  755 ++++++++++++++++++
>  block/qcow2-refcount.c |  836 +++++++++++++++++++
>  block/qcow2-snapshot.c |  405 ++++++++++
>  block/qcow2.c          | 2081 
> +-----------------------------------------------
>  block/qcow2.h          |  203 +++++
>  6 files changed, 2233 insertions(+), 2051 deletions(-)
>  create mode 100644 block/qcow2-cluster.c
>  create mode 100644 block/qcow2-refcount.c
>  create mode 100644 block/qcow2-snapshot.c
>  create mode 100644 block/qcow2.h
>
>
>
>   
Regards,

Anthony Liguori