[Qemu-devel] [PATCH V12 0/6] add-cow file format

[Dong Xu Wang <wdongxu@linux.vnet.ibm.com>]

This will introduce a new file format: add-cow. 

add-cow can benefit from other available functions, such as path_has_protocol and
qed_read_string, so we will make them public. 

Now add-cow is still using QEMUOptionParameter, not QemuOpts,  I will send a
separate patch series to convert.

snapshot_blkdev are not supported now for add-cow, after converting QEMUOptionParameter
to QemuOpts, will add related code.


v11->v12:
1) Removed un-used feature bit.
2) Share cache code with qcow2.c.
3) Remove snapshot_blkdev support, will add it in another patch.
5) COW Bitmap field in add-cow file will be multiple of 65536.
6) fix grammer and typo.

Dong Xu Wang (6):
  docs: document for add cow file format
  make path_has_protocol non-static
  qed_read_string to bdrv_read_string
  rename qcow2-cache.c to block-cache.c
  add-cow file format
  qemu-iotests

 block.c                      |   29 ++-
 block.h                      |    6 +
 block/Makefile.objs          |    4 +-
 block/add-cow.c              |  613 ++++++++++++++++++++++++++++++++++++++++++
 block/add-cow.h              |   85 ++++++
 block/qcow2-cache.c          |  323 ----------------------
 block/qcow2-cluster.c        |   66 +++--
 block/qcow2-refcount.c       |   66 +++--
 block/qcow2.c                |   36 ++--
 block/qcow2.h                |   24 +--
 block/qed.c                  |   29 +--
 block_int.h                  |    2 +
 docs/specs/add-cow.txt       |  123 +++++++++
 tests/qemu-iotests/017       |    2 +-
 tests/qemu-iotests/020       |    2 +-
 tests/qemu-iotests/check     |    4 +-
 tests/qemu-iotests/common    |    6 +
 tests/qemu-iotests/common.rc |   19 ++
 trace-events                 |   13 +-
 19 files changed, 994 insertions(+), 458 deletions(-)
 create mode 100644 block/add-cow.c
 create mode 100644 block/add-cow.h
 delete mode 100644 block/qcow2-cache.c
 create mode 100644 docs/specs/add-cow.txt