[Qemu-devel] [PATCH v6 0/6] block: allow commit active as top

[Fam Zheng <famz@redhat.com>]

Previously live commit of active block device is not supported, this series
implements it and updates corresponding qemu-iotests cases.

This series is based on BlockJobType enum QAPI series.

v6: Address comments from Stefan:

    [04/06] commit: support commit active layer
            Fix wording.
    [05/06] qemu-iotests: update test cases for commit active
            Drop is_active.

    Experimental for reviewers: the side by side diff against previous series:

        http://goo.gl/vgN6mc

v5: Address comments from Eric and Paolo:
    Add mirror_start_job and front end wrapper. [Paolo]
    Base on BlockJobType enum in QAPI. [Eric]
    Drop "common" sync mode. [Eric]

v4: Rewrite to reuse block/mirror.c.
    When committing the active layer, the job is internally a mirror job with
    type name faked to "commit".
    When the job completes, the BDSes are swapped, so the base image become
    active and [top, base) dropped.

Fam Zheng (6):
  mirror: don't close target
  mirror: move base to MirrorBlockJob
  block: add commit_active_start()
  commit: support commit active layer
  qemu-iotests: update test cases for commit active
  commit: remove unused check

 block/commit.c            |  8 +----
 block/mirror.c            | 77 +++++++++++++++++++++++++++++++++++++++--------
 blockdev.c                |  9 ++++--
 include/block/block_int.h | 22 ++++++++++++--
 qapi-schema.json          |  5 +--
 tests/qemu-iotests/040    | 74 ++++++++++++++++++++-------------------------
 6 files changed, 126 insertions(+), 69 deletions(-)

-- 
1.8.4.2